CN105820874B

CN105820874B - Modular annular extractor

Info

Publication number: CN105820874B
Application number: CN201610342608.1A
Authority: CN
Inventors: 尹越峰; 刘新旗; 沈阳; 黄文攀
Original assignee: Myande Group Co Ltd
Current assignee: Myande Group Co Ltd
Priority date: 2016-05-23
Filing date: 2016-05-23
Publication date: 2022-12-02
Anticipated expiration: 2036-05-23
Also published as: WO2017202268A1; CN105820874A

Abstract

The invention relates to a modularized annular leacher, wherein a leacher shell is formed by mutually splicing a head box body, a feeding section, an upper leaching section, a lower leaching section, a draining section and a tail box body, the upper layer of an annular chain is positioned in the feeding section and the upper leaching section, the lower layer of the annular chain is positioned in the lower leaching section and the draining section, and a plurality of scraping plates are uniformly arranged along the circumferential direction of the annular chain; the right port of the feeding section and the right port of the draining section are respectively connected with the upper end and the lower end of the head box body through flanges, the left port of the upper leaching section and the left port of the lower leaching section are respectively connected with the upper end and the lower end of the tail box body through flanges, the left port of the feeding section and the right port of the upper leaching section are connected through flanges, and the right port of the lower leaching section and the left port of the draining section are connected through flanges; the upper part of the right end of the feeding section is connected with a storage box, the top of the storage box is provided with a feeding hole, and the bottom of the head box is provided with a discharging hole. The annular leacher has the advantages of large daily leaching yield, convenient transportation and installation and less faults.

Description

Modular annular extractor

Technical Field

The invention relates to vegetable oil leaching equipment, in particular to a modular annular leacher, and belongs to the technical field of grease processing machinery.

Background

The leaching is the most critical process in the oil refining process, and the principle is that the solvent permeates into the solid oil to dissolve the oil to form thick mixed oil by utilizing the intersolubility of the oil and the solvent, and the thick mixed oil in the solid oil is diffused into the thin mixed oil outside to extract the oil due to the concentration difference. The main equipment in the leaching process is a leacher, and a tank set type leacher, a horizontal rotation type leacher or a ring type leacher and the like are generally adopted according to the material characteristics and the yield.

Traditional annular leaches ware includes the annular chain, the head lower extreme of annular chain adopts the drive of single drive axle, the head upper end adopts the arc track to turn to, afterbody bending segment adopts semi-circular track to supply upper chain to slide and turn to the lower floor, the below of upper chain is equipped with upper grid tray, lower floor's scraper blade below is equipped with lower floor's grid tray, the below of upper grid tray is equipped with upper oil fill, the below of lower floor's grid tray is equipped with lower floor's oil fill, on, the top of lower floor's grid tray is equipped with the bed of material respectively, evenly install heavy big scraper blade along the circumference of chain, on, the top of the bed of material is equipped with spray set respectively down, soak the extraction to the material, the grease that leaches falls into in the oil fill of below.

The chain length of the ultra-large annular leacher with the production capacity of 10000 tons/day is more than 130 meters, the weight of equipment reaches hundreds of tons, and the production line is interrupted every time a fault occurs, so that huge loss is caused, and the requirement on the reliability of the equipment is particularly high. The traditional annular leacher has the following defects:

1. the stress at the meshing part of the chain wheel on the driving shaft and the chain is large, and the abrasion is heavy; the chain is simultaneously under the action of tension and bending moment, the stress is large, and the chain is broken.

2. The heavy scraper has extremely high requirement on the wear resistance of a rail, wear-resistant steel with the hardness of more than HB600 is required to be used as a sliding rail, the rail is difficult to purchase, the rail has poor weldability, the rail is required to be connected by bolts, the bolt penetrating hole is difficult to process and has poor tightness, and the sealing gasket can be loosened due to vibration, impact and other reasons in the operation process, so that the solvent is leaked.

3. The head section and the tail arc section of the traditional annular leacher have large structural sizes, and particularly, the road transportation is difficult after the equipment is large-sized; in order to reduce resistance, the tail semicircular track is preferably in a shape of a regular arc, but the friction resistance is further increased because the transportation condition limit is exceeded and a part of large arc is in a shape of an ellipse in sections.

4. At the semicircular track upset department of afterbody, the material between the scraper blade is tubaeform and scatters, and when the scraper blade move lower floor's horizontal segment department back, close up to the parallel state each other between the adjacent scraper blade, the material that loosens and collapse between the scraper blade is extruded by the scraper blade and is become closely knit relatively, leads to the increase of stress of scraper blade and chain, has deformation and chain rupture risk, and maintenance intensity and safety risk are big.

5. The tail semicircular track section is a cavity filled with wet meal, no technological processes such as soaking, leaching and the like exist, and the wet meal and the oil can only be statically stored in the tail semicircular track section.

6. In order to ensure the first-in first-out of materials of the tail semicircular track section, the bottom of the heavy type large scraper is held tightly on the track along with the chain, and the upper edge of the heavy type large scraper is attached to the inner wall of the outer circular arc of the shell for scraping materials, so that the height of the heavy type large scraper is higher. When the heavy large scraper plate is transferred to the lower layer, the abrasion is increased due to scraping between the lower edge of the scraper plate and the grid plate, the friction force is increased due to large-area friction, and the abrasion is increased; the grid plate needs to be checked and replaced frequently after being worn, and the running cost is high.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provide a modular annular leacher which is high in daily leaching yield and convenient to transport and install.

In order to solve the technical problems, the modular annular leacher comprises a leacher shell and an annular chain positioned in the leacher shell, wherein a plurality of scrapers are uniformly arranged on the annular chain; the right port of the feeding section and the right port of the draining section are respectively connected with the upper end and the lower end of the head box body through flanges, the left port of the upper leaching section and the left port of the lower leaching section are respectively connected with the upper end and the lower end of the tail box body through flanges, the left port of the feeding section and the right port of the upper leaching section are connected through flanges, and the right port of the lower leaching section and the left port of the draining section are connected through flanges; the upper part of the right end of the feeding section is connected with a material storage box, the top of the material storage box is provided with a feeding hole, and the bottom of the head box body is provided with a discharging hole; and tail gas outlets are respectively arranged at the tops of the head box body, the feeding section, the upper leaching section and the tail box body.

Compared with the prior art, the invention has the following beneficial effects: after the annular chain starts, the oil material embryo gets into from the feed inlet at storage tank top, lay on upper material bed under the feeding device drive, upper scraper blade promotes the material and leaches the section from the feeding section upwards from right left side and gos forward, the oil material embryo becomes wet dregs by the miscella after spraying, wet dregs get into the afterbody box from the left end of last leaching section, the material falls on lower floor's material bed in the afterbody box, lower floor's scraper blade promotes the material and leaches section and the driping section through down from the bottom of afterbody box right side in proper order, reach the head box at last and discharge from the discharge gate. In the process of advancing the materials, the extract liquid continuously sprays, soaks and extracts the materials, and the leached grease falls into an oil hopper below. The invention divides the huge leacher into a plurality of independent modules, is convenient for preassembly and unit transportation in a manufacturing workshop, can be conveniently connected into a whole when arriving at an installation site, and greatly reduces the installation workload and the construction period on the site.

As an improvement of the invention, the lower part of the head box body is provided with a lower driving shaft, a lower chain wheel is arranged on the lower driving shaft, and the upper part of the head box body is provided with an upper guide device; an upper driving shaft is arranged at the upper part of the tail box body, an upper chain wheel is installed on the upper driving shaft, a lower tensioning shaft is arranged at the lower part of the tail box body, a lower tensioning chain wheel is installed on the lower tensioning shaft, and the annular chain is sequentially wound on the lower chain wheel, the upper guide device, the upper chain wheel and the lower tensioning chain wheel; the upper guide device is a slide rail or an upper tension chain wheel. The lower driving shaft is arranged at the right lower part of the annular chain, the upper driving shaft is arranged at the left upper part of the annular chain, the upper driving shaft drives the upper-layer chain, the lower driving shaft drives the lower-layer chain, and the two driving shafts synchronously run with the same torque and are reduced by more than half compared with the driving load of a single driving shaft. When single-shaft driving is avoided, the main driving shaft drives the chain and plays a role in tensioning the chain, and translation adjustment of a large-scale driving mechanism is avoided. A huge tail semicircular track is cancelled, so that the friction of the chain tightly held on the long semicircular track is avoided; the chain and the chain wheel are uniformly distributed, the stress is small, the abrasion is reduced by more than half, the chain only stretches the load and has no bending moment, the chain tension of the extractor in the same specification is only 50% of that of the original structure, the stress condition is fundamentally improved, and the reliability is greatly improved.

As a further improvement of the present invention, the upper driving shaft is driven by an upper hydraulic driving device, the lower driving shaft is driven by a lower hydraulic driving device, the upper hydraulic driving device and the lower hydraulic driving device are controlled by the same hydraulic pump station, the oil inlets of the upper hydraulic driving device and the lower hydraulic driving device are respectively connected with a hydraulic oil supply main pipe through an oil supply branch pipe, and the oil return ports of the upper hydraulic driving device and the lower hydraulic driving device are respectively connected with a hydraulic oil return main pipe through an oil return branch pipe; the hydraulic power unit includes hydraulic tank, hydraulic oil pump and tribit four-way reversing valve, the hydraulic oil pump is by hydraulic oil pump motor drive, the meso position function of tribit four-way reversing valve is the M type, the suction inlet of hydraulic oil pump with the oil-out of hydraulic oil tank links to each other and hydraulic oil tank's oil-out department installs the oil absorption filter, the export of hydraulic oil pump pass through the check valve with the P mouth of tribit four-way reversing valve links to each other, the T mouth of tribit four-way reversing valve with hydraulic oil tank's oil return opening links to each other, the A mouth of tribit four-way reversing valve with the hydraulic oil supply main pipe links to each other, the B mouth of tribit four-way reversing valve with the hydraulic oil return main pipe links to each other. The three-position four-way reversing valve is switched to the middle position through the handle, the hydraulic oil pump is started, hydraulic oil in the hydraulic oil tank enters the hydraulic oil pump after being filtered by the oil absorption filter, at the moment, the P port and the T port of the three-position four-way reversing valve are directly communicated for returning oil, and the hydraulic oil output by the hydraulic oil pump returns to the hydraulic oil tank to realize the no-load starting of the hydraulic oil pump motor. When the hydraulic oil tank works normally, the three-position four-way reversing valve is switched to a right station through the handle, hydraulic oil enters the hydraulic oil supply main pipe from the port A of the three-position four-way reversing valve, enters the upper hydraulic driving device and the lower hydraulic driving device simultaneously through the hydraulic oil supply main pipe, drives the upper driving shaft and the lower driving shaft to rotate synchronously, return oil of the upper hydraulic driving device and return oil of the lower hydraulic driving device enter the hydraulic oil return main pipe respectively, enter the port B of the three-position four-way reversing valve from the hydraulic oil return main pipe, and then return to the hydraulic oil tank from the port T. After the leacher is started and debugged for a small amount of feeding, the three-position four-way reversing valve can be switched to the left station through the handle, so that the reverse rotation of the upper driving shaft and the lower driving shaft is realized, and the materials can be discharged from the discharge port of the head box body as soon as possible. The hydraulic oil output by the hydraulic oil pump is distributed to the two oil supply branch pipes by the hydraulic oil supply main pipe, then respectively enters the upper hydraulic driving device and the lower hydraulic driving device, and then is converged into the hydraulic oil return main pipe by the two oil return branch pipes and then returns to the hydraulic oil tank; because the pressure of the hydraulic oil input by the upper hydraulic driving device and the pressure of the hydraulic oil input by the lower hydraulic driving device are equal, the output torques of the upper driving shaft and the lower driving shaft are theoretically the same, and the pressure is automatically balanced by a hydraulic system, so that the synchronous and stable operation of the two shafts is ensured.

As a further improvement of the present invention, a plurality of material shifting devices are respectively and uniformly installed on the upper driving shaft and the lower driving shaft along the axial direction, each material shifting device respectively comprises a clamping shell which is encircled and connected on the periphery of the upper driving shaft or the lower driving shaft, the periphery of each clamping shell is respectively and symmetrically provided with a shifting rod which extends outwards along the radial direction, and the end part of each shifting rod is respectively connected with a blade which is perpendicular to the axis of the shifting rod. The thickness of a material layer is usually 1 meter, the self weight is large, the material layer is extruded in the process of being pushed by a scraper and is continuously soaked by a solvent, the material layer is more compact when the material layer moves forwards, the surface of wet meal is rough, the wet meal is easy to agglomerate and arch, the wet meal can freely fall under the action of the self weight when entering a tail box body from an upper leaching section, and once the material layer is arched, bridging is easy to generate, a suspended material column is formed, the material column falls in a large block shape, so that the material layer with the same height is difficult to form on a lower material bed, and subsequent leaching is influenced; the material poking device is arranged on the upper driving shaft, and rotates along with the upper driving shaft, if a suspended material column is generated, the suspended material column can be forcibly poked down by the paddle of the material poking device, so that continuous falling is realized, and a stable and equal-height material layer can be formed on a lower material bed. In a similar way, the material stirring device is arranged on the lower driving shaft, so that the discharge of the material from the discharge port of the head box body can be continuously and stably realized, and the stable feeding of the subsequent evaporation process is ensured.

As a further improvement of the invention, the scraper extends along the breadth direction of the extractor, two ends of the scraper are respectively and fixedly connected to outer chain plates of the annular chain, the outer chain plates are hinged to the outer sides of the inner chain plates through chain pins, chain rollers are respectively sleeved in the middle of the chain pins, and wear-resistant sliding blocks are respectively fixed on the top of the scraper and the corresponding parts of the chain rollers; an upper grid plate is arranged below the upper layer of the annular chain, and an upper sliding rail which is in contact with the chain roller is embedded in the upper grid plate; and a lower grid plate is arranged below the lower scraper plate, and a lower sliding rail in contact with the wear-resistant sliding block is embedded on the lower grid plate. The top of the scraper is fixed with a wear-resistant slide block which is supported on the lower slide rail, so that a small gap is formed between the top of the lower scraper and the lower grid plate; the chain has small advancing friction, no damage to the grid plate, long service life of the grid plate and low operation cost; the scraper plate and the grid plate are free of contact and zero abrasion, the gap between the grid plate and the grid plate is prevented from being enlarged due to abrasion, excessive cake blank powder enters mixed oil, harm or adverse effect is caused to a leaching system, the service life of a leaching device is prolonged, frequent inspection and replacement of the grid plate after abrasion are also avoided, and the running cost is high.

As a further improvement of the invention, the lower drive shaft is located right below the upper guide device, and the lower tensioning shaft is located left below the upper drive shaft; the right side of the upper driving shaft is provided with a slide carriage which is butted with the left end of the upper grid plate, the lower end of the slide carriage inclines leftwards, a material baffle which inclines rightwards is arranged between the lower end of the slide carriage and the lower tensioning shaft, and a blind plate which is horizontally butted with the lower grid plate is arranged under the lower end of the material baffle. The annular chain is trapezoidal, so that the wrap angle and the resistance of the upper guide device are reduced, the wrap angle of the lower tensioning chain wheel is increased, a space is provided for a slide carriage in the tail box body, wet meal slides down along the inclined plane of the slide carriage, slides out of the bottom of the slide carriage and then hits a material baffle to turn, and then falls on the blind plate; the striker plate not only plays a role in steering, but also slows down the impact generated by the free falling of the wet meal; the lower layer material bed in the tail box body adopts the blind plate to bear falling wet meal, so that the impact resistance is improved, the blind plate removes impact energy and then drags the lower layer grid plate to be soaked through the strip-shaped scraper plate, the blind plate and the lower layer grid plate jointly form the lower layer material bed, and the wet meal is prevented from impacting and entering gaps of the lower layer grid plate to cause material leakage and influence the cleanliness of mixed oil. Compared with the tail part of the semicircular track, the structure of the slide carriage and the striker plate greatly saves space and is convenient to transport; the slide carriage and the material blocking plate do not generate any friction on the chain, and can be made of common materials, so that the solvent leakage at the bolt hole due to the adoption of bolt connection is avoided. Compared with the traditional structure that the chain is tightly held on the tail semicircular track to slide, the tail box body has the advantages that the stress condition of the upper driving shaft and the lower tensioning shaft in the tail box body is good, and the running resistance is small. The tail part of the scraper does not need to be turned from top to bottom to scrape materials, the scraper can adopt a light strip scraper, a heavy large scraper is not needed, the surfaces of oil material blanks and wet meal are rough, the binding force between the oil material blanks and the wet meal is very large, and the material layer which is several times of the height of the scraper can move forwards only by adopting the light strip scraper with lower height. The tail part of the traditional semicircular track pushes materials to descend and turn by virtue of a heavy scraper, and soaking and leaching of wet meal are interrupted in the descending process of turning; the material of the invention slides downwards by gravity, and does not contact with the scraper at the falling section, so that the soaking and leaching can be continuously carried out in the descending process, and the leaching capacity and efficiency are greatly improved.

As a further improvement of the invention, a new solvent spray tank is arranged below the middle top wall of the draining section, the inlet of the new solvent spray tank is connected with a new solvent pipe, a draining section spray tank is arranged below the left top wall of the draining section, a draining section oil hopper is arranged below a grid plate of the draining section, the bottom of the draining section oil hopper is connected with the inlet of a draining section circulating pump, and the outlet of the draining section circulating pump is connected with the inlet of the draining section spray tank; a plurality of lower leaching section oil hoppers are sequentially arranged below the grid plate of the lower leaching section, a plurality of lower leaching section spraying grooves are arranged below the top wall of the lower leaching section, the bottom of each lower leaching section oil hopper is respectively connected with an inlet of a lower leaching section circulating pump, and an outlet of each lower leaching section circulating pump is respectively connected with an inlet of a corresponding upper lower leaching section spraying groove; the bottom of the tail box body is provided with a tail box body oil hopper, an upper self-circulation spraying groove is arranged above the upper end of the slide carriage, a lower self-circulation spraying groove is arranged above a lower-layer material of the tail box body, an offline spraying groove is arranged below the left top wall of the upper leaching section, the bottom of the tail box body oil hopper is connected with an inlet of a tail box body circulating pump, and an outlet of the tail box body circulating pump is respectively connected with inlets of the upper self-circulation spraying groove, the lower self-circulation spraying groove and the offline spraying groove through valves; a plurality of upper leaching section oil hoppers are sequentially arranged below the grid plate of the upper leaching section, a plurality of stages of upper leaching section spraying grooves are arranged below the top wall of the upper leaching section, the bottom of each upper leaching section oil hopper is respectively connected with an inlet of an upper leaching section circulating pump, and an outlet of each upper leaching section circulating pump is respectively connected with an inlet of the corresponding upper leaching section spraying groove above; the upper part of the left side wall of the upper leaching section oil hopper is connected with an over-line oil supplementing pipe, and the inlet of the over-line oil supplementing pipe is connected with the outlet of the tail box body circulating pump; the left side of the oil hopper of the draining section overflows to the lower leaching section oil hopper at the rightmost side, the oil hopper of the lower leaching section overflows step by step from right to left, and the oil hopper of the lower leaching section at the leftmost side overflows to the oil hopper of the tail box body; and the upper leaching section oil hopper overflows step by step from left to right. And in the middle of the draining section, the new solvent enters a new solvent spraying groove through a new solvent pipe to be sprayed downwards, the wet meal of the draining section with the lowest oil content is subjected to final soaking and rinsing to obtain meal with the oil content lower than 0.8% (dry basis), then the meal continuously moves rightwards to enter a non-spraying section to be drained, and the drained meal enters a head box body rightwards and is discharged from a discharge hole. The new solvent is used for soaking and leaching the wet meal to form mixed oil with extremely low concentration, the mixed oil falls into an oil bucket of a draining section, is pumped out by a circulating pump of the draining section and is sent to a spraying groove of the draining section to spray the left part of the draining section, the wet meal of the draining section with the second-lower oil content is soaked and leached, and the obtained mixed oil with the lower concentration falls into the oil bucket of the draining section and is pumped out by a circulating pump of the draining section to be circularly sprayed. And the mixed oil overflowing from the oil bucket at the draining section flows to the oil bucket at the lower leaching section, is pumped out by a circulating pump at the lower leaching section and is sent to a spray tank at the lower leaching section for spraying downwards, wet meal at the lower leaching section with slightly high oil content is soaked and leached, the obtained mixed oil with slightly high concentration falls back to the oil bucket at the lower leaching section, and is pumped out by the circulating pump at the lower leaching section for circulating spraying. The lower leaching section oil hopper, the lower leaching section circulating pump and the lower leaching section spray tank are provided with multiple stages from right to left, and the lower leaching section oil hopper on the right side overflows to the lower leaching section oil hopper on the left side in sequence. The mixed oil overflowing from the leftmost lower leaching section oil bucket flows to the tail box body oil bucket, is pumped out by the tail box body circulating pump and is sent to the upper self-circulation spraying groove, the lower self-circulation spraying groove and the cross-line spraying groove to be sprayed downwards, wherein the upper self-circulation spraying groove sprays wet meal on the slide carriage, and the lower self-circulation spraying groove sprays wet meal on the lower layer of the tail box body; the line-crossing spraying groove sprays the left material layer of the upper leaching section, and the falling mixed oil enters the oil hopper of the upper leaching section, so that the lower-layer mixed oil is conveyed to the upper layer. The tail box body oil hopper plays a role in transferring the mixed oil to an upper layer, is usually maintained in a half-empty state, and the extraction amount of the tail box body oil hopper is equal to the new dissolution amount and the extraction amount. If the maximum spraying and permeating amount of the cross-line spraying groove cannot meet the requirement of upper-layer extraction, the corresponding valve can be opened to directly supply oil to the oil hopper of the upward leaching section through the cross-line oil supplementing pipe. And the mixed oil with higher oil content in the upper leaching section oil hopper is pumped out by the upper leaching section circulating pump and is sent to the upper leaching section spray tank to be sprayed downwards, wet meal of the upper leaching section with higher oil content is soaked and leached, and the obtained mixed oil with higher concentration falls back into the upper leaching section oil hopper and is pumped out by the upper leaching section circulating pump to be sprayed circularly. The upper leaching section oil hopper, the upper leaching section circulating pump and the upper leaching section spraying groove are provided with multiple stages from left to right, and the upper leaching section oil hopper on the left side overflows to the upper leaching section oil hopper on the right side in sequence. The invention realizes the reverse flow of materials and the solvent, the fresest solvent soaks the wet meal with the lowest oil content, the mixed oil with lower concentration soaks the wet meal with higher oil content, the mixed oil with higher concentration soaks the wet meal with higher oil content, the larger concentration difference between the extraction liquid and the wet meal is always kept, and the extraction effect is ensured.

As a further improvement of the invention, a left feeding section oil hopper and a right feeding section oil hopper are arranged below a grid plate of the feeding section, a left feeding section spraying groove and a right feeding section spraying groove are arranged below the top wall of the feeding section, the rightmost upper leaching section oil hopper overflows to the right feeding section oil hopper through a aqueduct, and the right feeding section oil hopper overflows to the left feeding section oil hopper; the bottom of the right feeding section oil hopper is connected with an inlet of a right feeding section circulating pump, and an outlet of the right feeding section circulating pump is connected with an inlet of the left feeding section spray tank; the bottom of the left feeding section oil hopper is connected with the inlet of the left feeding section circulating pump, and the outlet of the left feeding section circulating pump is connected with the inlet of the right feeding section spray tank. High-concentration mixed oil overflowing from the oil bucket of the upper leaching section on the rightmost side enters the oil bucket of the right feeding section through the aqueduct, is pumped out by the circulating pump of the right feeding section and is sent to the spraying tank of the left feeding section to be sprayed downwards, wet meal at the left part of the feeding section is soaked and leached, the obtained high-concentration mixed oil falls back into the oil bucket of the left feeding section, is pumped out by the circulating pump of the left feeding section and is sent to the spraying tank of the right feeding section to be sprayed downwards, and oil embryos which just enter at the right part of the feeding section are soaked and leached, so that the obtained high-concentration mixed oil falls back into the oil bucket of the right feeding section; and the redundant mixed oil in the right feeding section oil hopper overflows leftwards into the left feeding section oil hopper. Because the mixed oil falling into the right feeding section oil hopper contains a large amount of meal powder after the right part of the feeding section oil blank which just enters is soaked and leached for the first time, pipelines, pumps and equipment are easy to block after sedimentation, the mixed oil is pumped out by the right feeding section circulating pump and is sent to the left feeding section spraying groove for spraying, and after a wet meal material layer at the left part of the feeding section is filtered, the concentrated mixed oil with less impurities can be obtained from the left feeding section oil hopper, so that the subsequent separation and evaporation are facilitated. The mixed oil with the highest concentration can extract the oil embryos with the highest oil content, and a good extraction effect can be kept.

As a further improvement of the invention, an upper overflow port of the left feeding section oil hopper is connected with an inlet of an oil outlet pump of the leacher through an overflow pipeline, an outlet of the oil outlet pump of the leacher is connected with an inlet of a primary hydrocyclone separator, an outlet of the primary hydrocyclone separator is connected with an inlet of a secondary hydrocyclone separator, an outlet of the secondary hydrocyclone separator is connected with an inlet at the top of a temporary storage tank, an oil outlet at the lower part of the temporary storage tank is connected with an inlet of a mixed oil extraction pump, and an outlet of the mixed oil extraction pump is connected with an inlet of an evaporation system; the bottom emptying ports of the primary hydrocyclone separator, the secondary hydrocyclone separator and the temporary storage tank are respectively connected with a backflow header pipe, an overflow port of the temporary storage tank is also connected with the backflow header pipe, and an outlet of the backflow header pipe is connected with an inlet of the right feeding section spray groove. The thick mixed oil overflowing from the upper part of the left feeding section oil hopper is pumped out by an oil pump of the leacher, enters a primary hydrocyclone separator to remove coarse impurities, then enters a secondary hydrocyclone separator to remove fine impurities, then the clean thick mixed oil enters a temporary storage tank, is pumped out by the mixed oil pump from the temporary storage tank and enters a subsequent evaporation process. The mixed oil containing impurities and discharged from the bottoms of the primary hydrocyclone separator, the secondary hydrocyclone separator and the temporary storage tank returns to the right feeding section spraying groove through the reflux main pipe, and the oil blanks which just enter the spraying groove are sprayed, so that the graded circulation and the whole recycling of the concentrated mixed oil are realized.

As a further improvement of the invention, rake devices for scraping the top surface of the material layer are respectively arranged below the top walls of the feeding section, the upper leaching section, the lower leaching section and the draining section, each rake device comprises a rake body, the rake body is provided with a horizontal lower edge inclined towards the incoming material direction, a plurality of rake teeth inserted into the material layer are uniformly connected to the horizontal lower edge, the upper end of the rake body is hung on a rake horizontal shaft, two ends of the rake horizontal shaft are hinged to rake supports, and the rake supports are fixed on the leacher shell. The rake body is hung on a rake horizontal shaft, the top of a material layer is strickled off by the horizontal lower edge of the rake body, the thrust of the material layer overcomes the dead weight of the rake body and lifts the lower edge of the rake body to a certain height to reach a balanced state, rake teeth are inserted into the material layer to form a plurality of grooves which are parallel to each other on the surface of the material layer, the flow and the uniform distribution of mixed oil are facilitated, fresh solvent or mixed oil is sprayed on the surface of the material layer to permeate downwards, when the spraying amount of the mixed oil is slightly larger than the permeation amount, the surface of the material layer can form a liquid level, the circulation amount of the mixed oil reaches the maximum at the moment, and the rake body is also in a proper state for process setting, the horizontal lower edge of the rake body can avoid the mixed oil from channeling along the top surface of the material layer, and the effect of countercurrent extraction is ensured.

As a further improvement of the invention, the hydraulic oil pump motor M1 is driven by a frequency converter VFD, the frequency converter VFD is controlled by a control loop, a start button SB1, a stop button SB2, a fault disconnection contact of the frequency converter VFD, a delay disconnection normally closed contact KT1-1 of a stall alarm delay relay and a coil of a main motor control relay K1 are sequentially connected in series between a live wire and a zero line of the control loop, two ends of the start button SB1 are connected in parallel with a self-protection contact K1-1 of the main motor control relay, and a second normally open contact K1-2 of the main motor control relay is connected in series with a start signal input end of the frequency converter VFD; the material level signal output end of the material level transmitter LT is connected with the analog signal input end AI of the frequency converter VFD, and the analog signal output end AO of the frequency converter VFD is connected with the first signal source input end AI1 of the comparison relay SSR; the signal end output end of a speed measuring switch ZS for detecting the advancing speed of the leacher chain is connected with the signal input end of a speed transmitter SST, and the signal output end of the speed transmitter SST is connected with a second signal source input end AI2 of a comparison relay SSR; a comparison signal fault contact of the comparison relay SSR is connected in series with a third normally open contact K1-3 of a main motor control relay and a coil of the stall alarm delay relay KT1 and then is connected between a live wire and a zero wire of a control loop; a high material level switch LT-H of the material level transmitter LT is connected in series with a coil of a high material level alarm relay KT2 and then connected between a live wire and a zero line of a control loop, and a normally open contact KT2-1 of the high material level alarm relay KT2 is connected in series with a coil of a feeding prohibition relay K2 and then connected between the live wire and the zero line of the control loop; a low material level switch LT-L of the material level transmitter LT is connected between a live wire and a zero wire of a control loop after being connected with a coil of a low material level alarm relay KT3 in series, and a normally closed contact KT3-1 of the low material level alarm relay KT3 is connected between a delay disconnection normally closed contact KT1-1 of a stall alarm delay relay and a coil of a main motor control relay K1 in series. The starting button SB1 is pressed, a coil of the main motor control relay K1 is electrified, a self-protection contact K1-1 of the main motor control relay attracts self-protection, a second normally-open contact K1-2 of the main motor control relay is closed, a frequency converter VFD starts to drive a hydraulic oil pump motor M1 to rotate, and a hydraulic pump station drives a chain to advance through a hydraulic driving system; the frequency converter adjusts the rotating speed of a motor M1 of the hydraulic oil pump according to the material level signal detected by the material level transmitter LT and provides a driving speed signal to a first signal source input end of a comparison relay SSR; the speed measurement switch ZS detects the actual advancing speed of the leacher chain and provides an actual speed signal of the chain to the second signal source input end of the comparison relay SSR through the speed transmitter SST; if the driving speed signal and the actual speed signal of the chain have larger errors, a fault contact of a comparison signal of the comparison relay SSR is closed, a coil of the stall alarm time-delay relay KT1 is electrified, a normally closed delay-off contact KT1-1 of the stall alarm time-delay relay is in delay-off, a coil of the main motor control relay K1 is in power-off, a self-protection contact K1-1 of the main motor control relay, a second normally open contact K1-2 of the main motor control relay and a third normally open contact K1-3 of the main motor control relay are simultaneously disconnected, and the frequency converter VFD stops working to stop the forward movement of the annular chain. When the frequency converter VFD breaks down, the fault disconnection contact of the frequency converter VFD is disconnected, so that the hydraulic oil pump motor M1 is stopped. When the material layer height in the leaching device is too high, the high material level switch LT-H is triggered to be closed, the coil of the high material level alarm relay KT2 is electrified, the normally open contact KT2-1 of the high material level alarm relay KT2 is closed, the coil of the incoming material forbidden relay K2 is electrified, and a feeding stopping signal is sent to the feeding circuit. When the feeding mechanism breaks down to enable the material layer height in the leacher to be too low, the low material level switch LT-L is triggered to be closed, the coil of the low material level alarm relay KT3 is electrified, the normally closed contact KT3-1 of the low material level alarm relay KT3 is in delayed disconnection, the coil of the main motor control relay K1 is in power loss, and the frequency converter VFD stops working to enable the annular chain to stop advancing.

As a further improvement of the invention, the SSR comprises a power supply module, a CPU, a communication module, an input module and a relay driving module; the power supply module converts DC24V into DC 5V working voltage and provides the working voltage to each module; the CPU converts the two paths of analog signals transmitted by the input module into digital signals, then compares and judges the calculation results, and outputs low level to the relay driving module to drive the fault contact of the comparison signal to act if the error of the two paths of signal values exceeds an allowable value; the communication module downloads a program into the CPU or uploads data and working states in the CPU to an upper computer; the input module respectively converts the received two paths of current signals of 4 to 20mA into voltage signals of 0 to 5V, and sends the voltage signals to two paths of analog signal input ends of a CPU (central processing unit) to play a role in signal isolation; and the relay driving module receives a low-level control signal sent by the CPU and performs excitation amplification, so that the fault contact of the comparison signal generates closing action. The communication module downloads a program into a CPU, a first signal source input end AI1 of an input module receives an analog signal, namely a driving analog signal, output by a frequency converter VFD, a second signal source input end AI2 of the input module receives the analog signal and an actual chain advancing speed analog signal, which are sent by a speed transmitter SST, the input module converts two received current signals of 4 to 20mA into voltage signals of 0 to 5V respectively and sends the voltage signals to two analog signal input ends P1.1 and P1.2 of the CPU; the CPU converts two DC 0-5V analog signals transmitted by the input module into 10-bit digital signals, calculates according to respective measuring ranges, then compares and judges the calculation results, if the error of the two signal values exceeds an allowable value, P0.5 outputs low level to be transmitted to the relay driving module, and the relay driving module drives a comparison signal fault contact to be closed; the communication module can upload data and working states in the CPU to the upper computer.

Drawings

The invention will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

FIG. 1 is a front view of a modular annular extractor of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a perspective view of fig. 1.

FIG. 4 is a feed solvent flow diagram of the modular annular extractor of the present invention.

FIG. 5 is a schematic view of the drive system of the modular annular extractor of the present invention.

Fig. 6 is a perspective view of the drive system of the modular annular extractor of the present invention.

FIG. 7 is a piping diagram of the hydraulic system of the modular annular extractor of the present invention.

Fig. 8 is a perspective view of the drive train of the modular annular extractor of the present invention.

Fig. 9 is an enlarged view of a portion a in fig. 8.

FIG. 10 is a block diagram of the rear box of the modular annular extractor of the present invention.

Fig. 11 is a perspective view of fig. 10.

Fig. 12 is a perspective view of the upper drive shaft in the modular annular extractor of the present invention.

Fig. 13 is a perspective view of the setting device in fig. 12.

Figure 14 is a perspective view of an off-line spray tank in a modular annular extractor of the present invention.

Fig. 15 is a perspective view of a rake assembly in the modular annular extractor of the present invention.

Figure 16 is a system diagram of a modular annular extractor of the present invention.

Fig. 17 is a hydraulic schematic of a modular annular extractor of the present invention.

Fig. 18 is a control circuit diagram of a modular annular extractor of the present invention.

Fig. 19 is a schematic diagram of the comparison relay in fig. 18.

In the figure: 1. a material storage box; 1a, a feed inlet; 2. a feeding section; 2a. Aqueduct; 2b, a left feeding section spray tank; 2c, a right feeding section spray tank; 2d, a left feeding section oil hopper; 2e, a right feeding section oil hopper; 2f, a tail gas outlet of the feeding section; 3. an upper leaching section; 3a, crossing the line to spray the trough; 3b, spraying a tank on the upper leaching section; 3c, an upper leaching section oil hopper; 3d, discharging tail gas of the upper leaching section; 4. a lower leaching section; 4a, a lower leaching section spray tank; 4b, an oil hopper at a lower leaching section; 5. a draining section; 5a, a new solvent spraying groove; 5b, a draining section spray tank; 5c, draining the oil bucket of the section; 6. a head box body; 6a, a discharge hole; 6b, a tail gas outlet of the head box body; 7. a tail box body; 7a, arranging a self-circulation spraying groove; 7b, arranging a self-circulation spraying groove; 7c, a tail box body oil hopper; 7d, a slide carriage; 7e, a striker plate; 7f, a blind plate; 7g, a tail gas outlet of the head box body; 8. an upper grid plate; 8a, an upper sliding rail; 9. a lower grid plate; 9a, a lower sliding rail; 10. an upper drive shaft; 10a, an upper hydraulic driving device; 10b, an upper chain wheel; 11. a lower drive shaft; 11a, a lower hydraulic driving device; 11b, a lower chain wheel; 12. an upper guide device; 13. a lower tensioning shaft; 13a, a lower tension sprocket; 14. a hydraulic pump station; 14a. A hydraulic tank; 14a1. An air filter; 14a2, a liquid level thermometer; 14b, an oil absorption filter; 14c, a manual ball valve; 14d, shock absorbing throat; 14e. a hydraulic oil pump; m1. Hydraulic oil pump motor; 14f, a one-way valve; 14g. Pressure oil filter; 14h, a three-position four-way reversing valve; 15. an endless chain; 15a, an outer chain plate; 15b, inner chain plate; 15c, chain rollers; 15d, wear-resisting sliding blocks; 16. a squeegee; 17. a rake device; 17a, a rake body; 17b, rake teeth; 17c rake horizontal axis; 17d, a rake support; 18. a material poking device; 18a, a card shell; 18b, a deflector rod; 18c, a deflector rod rib plate; 18d. A paddle; 19. a support leg; 20. a support bar; 21. a shell rib; B1. a draining section circulating pump; B2. a lower leaching section circulating pump; B3. an upper leaching section circulating pump; B4. a tail tank circulating pump; B5. a right feed section circulation pump; B6. a left feed section circulating pump; B7. an oil outlet pump of the leacher; B8. a mixed oil pump; G1. a new solvent tube; G2. repairing the oil pipe by crossing the line; G3. a return header pipe; G4. an oil discharge header pipe; H1. a primary hydrocyclone separator; H2. a secondary hydrocyclone separator; t1, temporary storage tank; zf. Evaporation system; C1. and a tail gas condenser.

Qm1, a circuit breaker; fc1, thermal relay; vfd, frequency converter; SB1. Start button; sb2. Stop button; K1. a main motor control relay; K2. forbidding a feeding relay; KT1. Stall warning delay relay; KT2. High material level alarm relay; KT3. Low material level alarm relay; LT, material level transmitter; zs, speed measuring switch; sst. A speed transmitter; SSR. Comparison relay; PT-H, super oil pressure alarm switch; PT-L. low oil pressure alarm switch; H1. a stall warning indicator light; H2. a high level alarm indicator light; H3. a low level alarm indicator light; H4. a hydraulic system fault indicator light; H5. and forbidding the incoming material indicating lamp.

Detailed Description

As shown in fig. 1 to 16, the modular annular extractor of the present invention comprises an extractor casing and an annular chain 15 located in the extractor casing, wherein a plurality of scrapers 16 are uniformly installed on the annular chain 15, the extractor casing is formed by mutually splicing a head box 6, a feeding section 2, an upper extraction section 3, a lower extraction section 4, a draining section 5 and a tail box 7, the upper layer of the annular chain 15 is located in the feeding section 2 and the upper extraction section 3, and the lower layer of the annular chain 15 is located in the lower extraction section 4 and the draining section 5; the right port of the feeding section 2 and the right port of the draining section 5 are respectively connected with the upper end and the lower end of the head box 6 through flanges, the left port of the upper leaching section 3 and the left port of the lower leaching section 4 are respectively connected with the upper end and the lower end of the tail box 7 through flanges, the left port of the feeding section 2 and the right port of the upper leaching section 3 are connected through flanges, and the right port of the lower leaching section 4 and the left port of the draining section 5 are connected through flanges; the upper part of the right end of the feeding section 2 is connected with a storage box 1, the top of the storage box 1 is provided with a feeding hole 1a, and the bottom of the head box body 6 is provided with a discharging hole 6a.

The upper leaching section 3 and the feeding section 2 are respectively supported on the lower leaching section 4 and the draining section 5 through supporting rods 20, and the lower leaching section 4, the draining section 5 and the tail box body 7 are respectively supported on the ground through supporting legs 19.

The top of head box 6 is equipped with head box tail gas outlet 6b, and the top of feeding section 2 is equipped with feeding section tail gas outlet 2f, and the top of going up leaching section 3 is equipped with and leaches section tail gas outlet 3d, and the top of afterbody box 7 is equipped with head box tail gas outlet 7g, and each tail gas outlet all is connected with tail gas condenser C1's entry.

After the annular chain 15 starts, the oil blank enters from a feed inlet 1a at the top of the storage box 1, the oil blank is laid on an upper material bed under the drive of a feeding device, an upper scraper plate pushes the material to upwards leach the section 3 from the feeding section 2 from right to left, the oil blank is sprayed by the mixed oil to form wet meal, the wet meal enters the tail box 7 from the left end of the upper leaching section 3, the material falls onto a lower material bed in the tail box 7, the lower scraper plate pushes the material to pass through the lower leaching section 4 and the draining section 5 from the bottom layer of the tail box 7 to the right in sequence, and finally the material reaches the head box 6 and is discharged from a discharge outlet 6a. In the process of advancing the materials, the extraction liquid continuously sprays, soaks and extracts the materials, and the leached grease falls into an oil hopper below the materials. The invention divides the huge leacher into a plurality of independent modules, is convenient for preassembly and unit transportation in a manufacturing workshop, can be conveniently connected into a whole when arriving at an installation site, and greatly reduces the installation workload and the construction period on the site.

A lower driving shaft 11 is arranged at the lower part of the head box body 6, a lower chain wheel 11b is arranged on the lower driving shaft 11, and an upper guide device 12 is arranged at the upper part of the head box body 6; an upper driving shaft 10 is arranged at the upper part of the tail box body 7, an upper chain wheel 10b is installed on the upper driving shaft 10, a lower tensioning shaft 13 is arranged at the lower part of the tail box body 7, a lower tensioning chain wheel 13a is installed on the lower tensioning shaft 13, and an annular chain 15 is sequentially wound on the lower chain wheel 11b, the upper guide device 12, the upper chain wheel 10b and the lower tensioning chain wheel 13 a; the upper guide 12 is a slide rail or an upper tension sprocket. The invention arranges a lower driving shaft 11 at the right lower part of an annular chain 15, arranges an upper driving shaft 10 at the left upper part of the annular chain 15, the upper driving shaft 10 drives an upper layer chain, the lower driving shaft 11 drives a lower layer chain, the two driving shafts synchronously run with the same torque, and the driving load is reduced by more than half compared with the driving load of a single driving shaft. When single-shaft driving is avoided, the main driving shaft drives the chain and plays a role in tensioning the chain, and translation adjustment of a large-scale driving mechanism is avoided. A huge tail semicircular track is cancelled, so that the chain is prevented from being tightly held on the long semicircular track to rub; the chain and the chain wheel are uniformly distributed, the stress is small, the abrasion is reduced by more than half, the chain only stretches the load and has no bending moment, the chain tension of the extractor in the same specification is only 50% of that of the original structure, the stress condition is fundamentally improved, and the reliability is greatly improved.

The upper driving shaft 10 and the lower driving shaft 11 are respectively and uniformly provided with a plurality of material shifting devices 18 along the axial direction, each material shifting device 18 respectively comprises a clamping shell 18a which surrounds and embraces the periphery of the upper driving shaft 10 or the lower driving shaft 11, the periphery of each clamping shell 18a is respectively and symmetrically provided with a shifting rod 18b which extends outwards along the radial direction, the shifting rod 18b is provided with a shifting rod rib plate 18c to improve the strength, and the end part of each shifting rod 18b is respectively connected with a paddle 18d which is vertical to the axis of the shifting rod.

The thickness of the material layer is usually 1 meter, the dead weight is large, the material layer is extruded in the process of being pushed by the scraper 16 to move forwards, and is continuously soaked by the solvent, the material layer is more compact when the material layer moves forwards, the surface of wet meal is rough, the wet meal is easy to agglomerate and arch, the wet meal can freely fall under the action of the dead weight when entering the tail box body 7 from the upper leaching section 3, and bridging is easy to generate once the arch is formed, a suspended material column is formed, the material column falls in a large block shape, so that the material layer at the lower layer is difficult to form a stable and same-height material layer, and subsequent leaching is influenced; according to the invention, the material stirring device 18 is arranged on the upper driving shaft 10, and the material stirring device 18 rotates along with the upper driving shaft 10, so that if a suspended material column is generated, the suspended material column can be forcibly stirred down by the paddle 18d of the material stirring device 18, and the material column can continuously fall off, thereby being beneficial to forming a stable and equal-height material layer on a lower material bed. In a similar way, the material stirring device 18 is arranged on the lower driving shaft 11, so that the continuous and stable discharging to the discharge hole 6a of the head box body 6 can be realized, and the stable feeding of the subsequent evaporation process is ensured.

As shown in fig. 8 and 9, the scraper 16 extends along the breadth direction of the extractor, two ends of the scraper 16 are respectively and fixedly connected to the outer chain plates 15a of the endless chain 15, the outer chain plates 15a are hinged to the outer sides of the inner chain plates 15b through chain pins, chain rollers 15c are respectively sleeved in the middle of the chain pins, and wear-resistant sliders 15d are respectively fixed at the top of the scraper 16 and the corresponding positions of the chain rollers 15 c; an upper grid plate 8 is arranged below the upper layer of the annular chain 15, and an upper sliding rail 8a which is contacted with a chain roller 15c is embedded on the upper grid plate 8; the lower grid plate 9 is arranged below the lower scraper, and the lower slide rail 9a which is contacted with the wear-resistant slide block 15d is embedded on the lower grid plate 9.

The upper layer chain rolls on the upper layer slide rail 8a through the chain roller 15c, when the chain rotates to the lower layer, the chain roller 15c cannot be supported on the lower layer slide rail 9a because the upper edge of the scraper is downward, and the wear-resistant slide block 15d is fixed at the top of the scraper and supported on the lower layer slide rail 9a through the wear-resistant slide block 15d, so that a small gap is formed between the top of the lower layer scraper and the lower layer grid plate 9; the chain has small advancing friction, no damage to the grid plate, long service life of the grid plate and low operation cost; the scraper plate and the grid plate are free of contact and zero abrasion, the grid plate is prevented from being abraded to increase gaps, excessive cake blank powder enters mixed oil, harm or adverse effect is caused to a leaching system, the service life of the leaching device is prolonged, frequent inspection and replacement of the grid plate after abrasion are avoided, and operation cost is high.

The lower driving shaft 11 is positioned right below the upper guide device 12, and the lower tensioning shaft 13 is positioned left below the upper driving shaft 10; the right side of the upper driving shaft 10 is provided with a slide carriage 7d butted with the left end of the upper grid plate 8, the lower end of the slide carriage 7d inclines leftwards, a material baffle plate 7e inclining rightwards is arranged between the lower end of the slide carriage 7d and the lower tensioning shaft 13, and a blind plate 7f horizontally butted with the lower grid plate 9 is arranged right below the lower end of the material baffle plate 7e.

The annular chain 15 is trapezoidal, so that the wrap angle and the resistance of the upper guide device 12 are reduced, the wrap angle of the lower tensioning chain wheel 13a is increased, a space is provided for a slide carriage 7d in the tail box body 7, wet meal slides along the inclined plane of the slide carriage 7d, slides out of the bottom of the slide carriage 7d, then hits a material baffle 7e to turn, and then falls on a blind plate 7 f; the material baffle 7e not only plays a role in steering, but also slows down the impact generated by the free falling of the wet meal; the lower layer material bed in the tail box body 7 adopts the blind plate 7f to bear the falling wet meal, and the support piece is added below the blind plate 7f, so that the shock resistance is improved, the blind plate 7f is used for eliminating the impact energy and then is dragged to the lower layer grid plate 9 through the strip-shaped scraper plate for immersion cleaning, the blind plate and the lower layer grid plate jointly form the lower layer material bed, and the wet meal is prevented from impacting and entering the gap of the lower layer grid plate 9 to cause material leakage and influence the cleanliness of the mixed oil.

Compared with the tail part of a semicircular track, the structure of the slide carriage 7d and the material baffle 7e greatly saves space and is convenient to transport; the slide carriage 7d and the material baffle 7e do not generate any friction on the chain, and can be made of common materials, so that the solvent leakage at the bolt hole caused by the connection of bolts is avoided.

Compared with the traditional structure that the chain is tightly held on the tail semicircular track to slide, the tail box body 7 has the advantages that the upper driving shaft 10 and the lower tensioning shaft 13 in the tail box body are good in stress condition and small in running resistance. The tail part does not need to scrape materials in a turning way from top to bottom, so that the scraping plate can adopt a light strip-shaped scraping plate, a heavy large scraping plate is not needed, the surfaces of oil blanks and wet meal are rough, the bonding force between the oil blanks and the wet meal is very large, and the material layer which is several times higher than the scraping plate can move forwards only by adopting the light strip-shaped scraping plate with lower height.

The material of the invention slides downwards by gravity, and does not contact with the scraper at the falling section, so that the soaking and leaching can be continuously carried out in the descending process, and the leaching capacity and efficiency are greatly improved.

The middle top wall of the draining section 5 is provided with a new solvent spray groove 5a, the inlet of the new solvent spray groove 5a is connected with a new solvent pipe G1, the left top wall of the draining section 5 is provided with a draining section spray groove 5B, the grid plate of the draining section 5 is provided with a draining section oil hopper 5c, the bottom of the draining section oil hopper 5c is connected with the inlet of a draining section circulating pump B1, and the outlet of the draining section circulating pump B1 is connected with the inlet of the draining section spray groove 5B.

A plurality of lower leaching section oil hoppers 4B are sequentially arranged below the grid plate of the lower leaching section 4, a plurality of lower leaching section spraying grooves 4a are arranged below the top wall of the lower leaching section 4, the bottoms of the lower leaching section oil hoppers 4B are respectively connected with the inlets of lower leaching section circulating pumps B2, and the outlets of the lower leaching section circulating pumps B2 are respectively connected with the inlets of the corresponding lower leaching section spraying grooves 4a above.

The bottom of afterbody box 7 is equipped with afterbody box oil fill 7c, the top of slide carriage 7d upper end is equipped with self-loopa spray tank 7a, the lower floor material top of afterbody box 7 is equipped with down self-loopa spray tank 7B, the below of 3 left parts roofs of upper leaching section is equipped with line-crossing spray tank 3a, afterbody box oil fill 7 c's bottom and afterbody box circulating pump B4's entry linkage, afterbody box circulating pump B4's export is respectively through valve and last self-loopa spray tank 7a, it is continuous to reach line-crossing spray tank 3 a's entry from self-loopa spray tank 7B down.

A plurality of upper leaching section oil hoppers 3c are sequentially arranged below the grid plate of the upper leaching section 3, a plurality of stages of upper leaching section spraying grooves 3B are arranged below the top wall of the upper leaching section 3, the bottoms of the upper leaching section oil hoppers 3c are respectively connected with the inlets of upper leaching section circulating pumps B3, and the outlets of the upper leaching section circulating pumps B3 are respectively connected with the inlets of the corresponding upper leaching section spraying grooves 3B above; the upper part of the left side wall of the upper leaching section oil hopper 3c is connected with an off-line oil supplementing pipe G2, and the inlet of the off-line oil supplementing pipe G2 is connected with the outlet of a tail box body circulating pump B4.

The left side of the oil hopper 5c of the draining section overflows to the lower leaching section oil hopper 4b at the rightmost side, the oil hopper 4b of the lower leaching section overflows from right to left step by step, and the lower leaching section oil hopper 4b at the leftmost side overflows to the oil hopper 7c of the tail box body; the upper leaching section oil hopper 3c overflows step by step from left to right.

In the middle of the draining section 5, a new solvent enters a new solvent spraying groove 5a through a new solvent pipe G1 to be sprayed downwards, wet meal of the draining section with the lowest oil content is subjected to final soaking and rinsing to obtain cake meal with the oil content lower than 0.8% (dry basis), then the cake meal continuously moves rightwards to enter a non-spraying section to be drained, and the drained cake meal enters a head box body 6 rightwards and is discharged from a discharge hole 6a.

The new solvent is used for soaking and leaching the wet meal to form mixed oil with extremely low concentration, the mixed oil falls into the oil hopper 5c of the draining section, is pumped out by the circulating pump B1 of the draining section and is sent to the spraying groove 5B of the draining section to spray the left part of the draining section 5, the wet meal of the draining section with the next low oil content is soaked and leached, the obtained mixed oil with the relatively low concentration falls into the oil hopper 5c of the draining section, and the mixed oil is pumped out by the circulating pump B1 of the draining section to be circularly sprayed.

The mixed oil overflowing from the oil bucket 5c of the draining section flows to the oil bucket 4B of the lower leaching section, is pumped out by a circulating pump B2 of the lower leaching section and is sent to a spray tank 4a of the lower leaching section to be sprayed downwards, wet meal of the lower leaching section with slightly high oil content is soaked and leached, the obtained mixed oil with slightly high concentration falls back to the oil bucket 4B of the lower leaching section, and is pumped out by the circulating pump B2 of the lower leaching section to be sprayed circularly. The lower leaching section oil hopper 4B, the lower leaching section circulating pump B2 and the lower leaching section spraying groove 4a are provided with multiple stages from right to left, and the lower leaching section oil hopper 4B on the right side overflows to the lower leaching section oil hopper 4B on the left side in sequence.

The mixed oil overflowing from the leftmost lower leaching section oil hopper 4B flows to the tail box body oil hopper 7c, is pumped out by the tail box body circulating pump B4 and is sent to the upper self-circulation spray tank 7a, the lower self-circulation spray tank 7B and the cross-line spray tank 3a to be sprayed downwards, wherein the upper self-circulation spray tank 7a sprays wet meal on the slide carriage 7d, and the lower self-circulation spray tank 7B sprays wet meal on the lower layer of the tail box body 7, so that compared with the traditional semicircular track tail, the soaking and leaching of the tail are increased, and the leaching capacity and efficiency are greatly improved; the line-crossing spraying groove 3a sprays the left material layer of the upper leaching section 3, and the falling mixed oil enters the oil hopper 3c of the upper leaching section, so that the lower-layer mixed oil is conveyed to the upper layer. The tail tank oil hopper 7c serves as a circulation function for transporting the mixed oil to the upper layer, and is normally maintained in a half-empty state, and the extraction amount thereof is equal to the new dissolution amount + the extraction amount. If the maximum spraying and permeating amount of the line-crossing spraying groove 3a cannot meet the requirement of upper-layer extraction, the corresponding valve can be opened to directly supply oil to the upper leaching section oil hopper 3c through the line-crossing oil supplementing pipe G2.

The mixed oil with higher oil content in the upper leaching section oil hopper 3c is pumped out by the upper leaching section circulating pump B3 and sent to the upper leaching section spray tank 3B for spraying downwards, the wet meal of the upper leaching section with higher oil content is soaked and leached, the obtained mixed oil with higher concentration falls back into the upper leaching section oil hopper 3c and is pumped out by the upper leaching section circulating pump B3 for circulating spraying. The upper leaching section oil hopper 3c, the upper leaching section circulating pump B3 and the upper leaching section spraying groove 3B are provided with multiple stages from left to right, and the upper leaching section oil hopper 3c on the left side overflows to the upper leaching section oil hopper 3c on the right side in sequence.

The invention realizes the reverse flow of materials and solvents, the fresest solvent soaks the wet meal with the lowest oil content, the mixed oil with the lower concentration soaks the wet meal with the higher oil content, the mixed oil with the higher concentration soaks the wet meal with the higher oil content, the larger concentration difference between the extraction liquid and the wet meal is always kept, and the extraction effect is ensured.

A left feeding section oil hopper 2e and a right feeding section oil hopper 2e are arranged below a grid plate of the feeding section 2, a left feeding section spraying groove 2c and a right feeding section spraying groove 2c are arranged below the top wall of the feeding section 2, the upper leaching section oil hopper 3c on the rightmost side overflows to the right feeding section oil hopper 2e through a aqueduct 2a, and the right feeding section oil hopper 2e overflows to the left feeding section oil hopper 2 d; the bottom of the right feeding section oil hopper 2e is connected with the inlet of a right feeding section circulating pump B5, and the outlet of the right feeding section circulating pump B5 is connected with the inlet of the left feeding section spray tank 2B; the bottom of the left feeding section oil hopper 2d is connected with the inlet of a left feeding section circulating pump B6, and the outlet of the left feeding section circulating pump B6 is connected with the inlet of a right feeding section spray groove 2c.

The high-concentration mixed oil overflowing from the oil hopper 3c at the rightmost upper leaching section enters a right feeding section oil hopper 2e through a aqueduct 2a, is pumped out by a right feeding section circulating pump B5 and is sent to a left feeding section spray tank 2B to be sprayed downwards, wet meal at the left part of the feeding section 2 is soaked and leached, the high-concentration mixed oil is obtained and falls back into the left feeding section oil hopper 2d, then is pumped out by a left feeding section circulating pump B6 and is sent to the right feeding section spray tank 2c to be sprayed downwards, oil embryos entering the right part of the feeding section 2 are soaked and leached, and the high-concentration mixed oil is obtained and falls back into the right feeding section oil hopper 2 e; the redundant mixed oil in the right feeding section oil hopper 2e overflows to the left and enters the left feeding section oil hopper 2d.

Because the mixed oil falling into the right feeding section oil hopper 2e contains a large amount of meal powder after the right part of the feeding section just enters the oil embryo is soaked and rinsed for the first time, the mixed oil is easy to cause the blockage of pipelines, pumps and equipment after being settled, the mixed oil is pumped by the right feeding section circulating pump B5 and sent to the left feeding section spraying groove 2B for spraying, and after being filtered by the wet meal material layer at the left part of the feeding section, the concentrated mixed oil containing less impurities can be obtained from the left feeding section oil hopper 2d, thereby being beneficial to subsequent separation and evaporation. The mixed oil with the highest concentration can extract the oil material embryo with the highest oil content, and a good extraction effect can be kept.

An upper overflow port of the left feeding section oil hopper 2d is connected with an inlet of an extractor oil outlet pump B7 through an overflow pipeline, an outlet of the extractor oil outlet pump B7 is connected with an inlet of a primary hydrocyclone H1, an outlet of the primary hydrocyclone H1 is connected with an inlet of a secondary hydrocyclone H2, an outlet of the secondary hydrocyclone H2 is connected with a top inlet of a temporary storage tank T1, a lower oil outlet of the temporary storage tank T1 is connected with an inlet of a mixed oil extraction pump B8, and an outlet of the mixed oil extraction pump B8 is connected with an inlet of an evaporation system ZF; the bottom emptying ports of the primary hydrocyclone H1, the secondary hydrocyclone H2 and the temporary storage tank T1 are respectively connected with a backflow main pipe G3, the overflow port of the temporary storage tank T1 is also connected with the backflow main pipe G3, and the outlet of the backflow main pipe G3 is connected with the inlet of the right feeding section spray groove 2c.

The thick mixed oil overflowing from the upper part of the left feeding section oil hopper 2d is pumped out by an oil outlet pump B7 of the leacher, enters a primary hydrocyclone H1 to remove coarse impurities, then enters a secondary hydrocyclone H2 to remove fine impurities, then the clean thick mixed oil enters a temporary storage tank T1, and is pumped out by a mixed oil pump B8 from the temporary storage tank T1 to enter a subsequent evaporation process. The mixed oil containing impurities and discharged from the bottoms of the first-stage hydrocyclone H1, the second-stage hydrocyclone H2 and the temporary storage tank T1 returns to the right feeding section spraying groove 2c through the backflow header pipe G3, and the oil blanks which just enter are sprayed, so that the graded circulation and the complete recycling of the concentrated mixed oil are realized.

The inlets of the draining section circulating pump B1, the lower leaching section circulating pump B2, the upper leaching section circulating pump B3, the tail box body circulating pump B4, the right feeding section circulating pump B5, the left feeding section circulating pump B6 and the leaching device oil outlet pump B7 are respectively connected with an oil discharge header pipe G4.

The lower parts of the top walls of the feeding section 2, the upper leaching section 3, the lower leaching section 4 and the draining section 5 are respectively provided with a rake device 17 for scraping the top surface of the material layer, the rake device 17 comprises a rake body 17a, the rake body 17a is provided with a horizontal lower edge inclined towards the material direction, the horizontal lower edge is uniformly connected with a plurality of rake teeth 17b inserted into the material layer, the upper end of the rake body 17a is hung on a rake horizontal shaft 17c, the two ends of the rake horizontal shaft 17c are hinged on a rake support 17d, and the rake support 17d is fixed on the leacher shell. The rake body 17a is hung on a rake horizontal shaft 17c, the top of the material layer is scraped by the horizontal lower edge of the rake body 17a, the thrust of the material layer overcomes the dead weight of the rake body 17a to lift the lower edge to a certain height to reach a balanced state, rake teeth 17b are inserted into the material layer to form a plurality of grooves which are parallel to each other on the surface of the material layer, so that the flow and the uniform distribution of mixed oil are facilitated, fresh solvent or mixed oil is sprayed on the surface of the material layer to permeate downwards, when the spraying amount of the mixed oil is slightly larger than the permeation amount, the surface of the material layer can form a liquid level, the circulating amount of the mixed oil reaches the maximum at the moment, and the process is also in a proper state, the mixed oil can be prevented from flowing along the top surface of the material layer by the horizontal lower edge of the rake body 17a, and the effect of countercurrent extraction is ensured.

The surface of leaching the ware casing evenly is provided with many outside convex casing ribs 21, and each casing rib 21 separates the surface of leaching the ware casing into a plurality of square spaces, inlays respectively in each square space and is equipped with insulation material, and casing rib 21 has both improved the intensity of casing, and the installation of insulation material of being convenient for again is fixed, still is convenient for the fixed of outward appearance covering. The shell ribs in the middle of the top surface of the shell are higher than the two sides, and the high middle and low two sides are formed after covering, so that water cannot be accumulated on the top surface of the shell.

As shown in fig. 7 and 17, the upper driving shaft 10 is driven by an upper hydraulic driving device 10a, the lower driving shaft 11 is driven by a lower hydraulic driving device 11a, the upper hydraulic driving device 10a and the lower hydraulic driving device 11a are controlled by the same hydraulic pump station 14, oil inlets of the upper hydraulic driving device 10a and the lower hydraulic driving device 11a are respectively connected with a hydraulic oil supply main pipe through an oil supply branch pipe, and oil return ports of the upper hydraulic driving device 10a and the lower hydraulic driving device 11a are respectively connected with a hydraulic oil return main pipe through an oil return branch pipe.

The hydraulic pump station 14 comprises a hydraulic oil tank 14a, a hydraulic oil pump and a three-position four-way reversing valve 14h, the hydraulic oil pump is driven by a hydraulic oil pump motor, the middle position of the three-position four-way reversing valve 14h can be M-shaped, a suction port of the hydraulic oil pump is connected with an oil outlet of the hydraulic oil tank 14a, an oil suction filter is arranged at the oil outlet of the hydraulic oil tank 14a, an outlet of the hydraulic oil pump is connected with a port P of the three-position four-way reversing valve 14h through a one-way valve 14f, a port T of the three-position four-way reversing valve is connected with an oil return port of the hydraulic oil tank 14a, a port A of the three-position four-way reversing valve is connected with a hydraulic oil supply main pipe, and a port B of the three-position four-way reversing valve is connected with a hydraulic oil return main pipe.

A manual ball valve 14c and a shock absorption throat 14d are arranged between a suction port of the hydraulic oil pump and an oil outlet of the hydraulic oil tank 14 a; and a pressure oil filter 14g is arranged between the check valve 14f and the port P of the three-position four-way reversing valve 14h.

The top of the hydraulic oil tank 14a is communicated with the atmosphere through an air filter 14a1, and a liquid level thermometer 14a2 is installed on the side wall of the hydraulic oil tank 14a.

The three-position four-way reversing valve 14h is switched to the middle position through the handle, the hydraulic oil pump is started, hydraulic oil in the hydraulic oil tank enters the hydraulic oil pump after being filtered by the oil absorption filter 14b, at the moment, the P port and the T port of the three-position four-way reversing valve are directly conducted for oil return, and the hydraulic oil output by the hydraulic oil pump returns to the hydraulic oil tank to realize the no-load starting of the hydraulic oil pump motor.

When the three-position four-way reversing valve works normally, the three-position four-way reversing valve 14h is switched to the right station through the handle, hydraulic oil enters the hydraulic oil supply main pipe from the port A of the three-position four-way reversing valve, enters the upper hydraulic driving device 11a and the lower hydraulic driving device 11a through the hydraulic oil supply main pipe simultaneously, drives the upper driving shaft 10 and the lower driving shaft 11 to rotate synchronously, return oil of the upper hydraulic driving device 10a and return oil of the lower hydraulic driving device 11a enter the hydraulic oil return main pipe respectively, enters the port B of the three-position four-way reversing valve from the hydraulic oil return main pipe, and returns to a hydraulic oil tank from the port T.

After the extractor is started and a small amount of feeding is carried out, the three-position four-way reversing valve 14h can be switched to the left station through the handle, so that the reverse rotation of the upper driving shaft 10 and the lower driving shaft 11 is realized, and the materials can be discharged from the discharge hole of the head box body as soon as possible.

As shown in fig. 18, the hydraulic oil pump motor M1 is controlled by the inverter VFD, the circuit breaker QM1 and the thermal relay FC1 are connected in series in the main circuit, and the inverter VFD is controlled by the control circuit. The control circuit adopts 24V direct current, a start button SB1, a stop button SB2, a fault disconnection contact of the frequency converter VFD, a delay disconnection normally closed contact KT1-1 of the stall warning delay relay and a coil of the main motor control relay K1 are sequentially connected in series between the positive electrode and the negative electrode of the control circuit, the two ends of the start button SB1 are connected in parallel with a self-protection contact K1-1 of the main motor control relay, and a second normally open contact K1-2 of the main motor control relay is connected in series with the start signal input end of the frequency converter VFD.

The material level signal output of the material level transmitter LT is connected to the analog signal input AI of the frequency converter VFD, the analog signal output AO of the frequency converter VFD is connected to the first signal source input AI1 of the comparison relay SSR. The signal end output end of a speed measuring switch ZS for detecting the advancing speed of the extractor chain is connected with the signal input end of a speed transmitter SST, and the signal output end of the speed transmitter SST is connected with a second signal source input end AI2 of a comparison relay SSR; and a comparison signal fault contact of the comparison relay SSR is connected in series with a third normally open contact K1-3 of the main motor control relay and a coil of the stall alarm time-delay relay KT1 and then is connected between the positive electrode and the negative electrode of the control loop. Two ends of a coil of the stall alarm delay relay KT1 are connected with a stall alarm indicator lamp H1 in parallel.

When the start button SB1 is pressed, the coil of the main motor control relay K1 is electrified, the self-protection contact K1-1 of the main motor control relay attracts self-protection, the second normally-open contact K1-2 of the main motor control relay is closed, the frequency converter VFD starts to drive the hydraulic oil pump motor M1 to rotate, and the hydraulic pump station drives the chain to move forward through the hydraulic drive system.

The frequency converter adjusts the rotating speed of the hydraulic oil pump motor M1 according to the material level signal detected by the material level transmitter LT, and provides a driving speed signal to the first signal source input end of the comparison relay SSR. The speed measurement switch ZS detects the actual advancing speed of the leacher chain and provides an actual speed signal of the chain to the second signal source input end of the comparison relay SSR through the speed transmitter SST; if the driving speed signal and the actual speed signal of the chain have larger errors, a comparison signal fault contact of the comparison relay SSR is closed, a stall alarm indicator lamp H1 is lightened, a coil of the stall alarm delay relay KT1 is electrified, a delay disconnection normally-closed contact KT1-1 of the stall alarm delay relay is in delay disconnection, a coil of a main motor control relay K1 is in power failure, a self-protection contact K1-1 of the main motor control relay, a second normally-open contact K1-2 of the main motor control relay and a third normally-open contact K1-3 of the main motor control relay are simultaneously disconnected, and the frequency converter VFD stops working to stop the annular chain from advancing.

When the frequency converter VFD has a fault, the fault disconnection contact of the frequency converter VFD is disconnected, so that the hydraulic oil pump motor M1 is stopped.

A high material level switch LT-H of the material level transmitter LT is connected in series with a coil of a high material level alarm relay KT2 and then connected between the positive electrode and the negative electrode of a control loop, two ends of the coil of the high material level alarm relay KT2 are connected in parallel with a high material level alarm indicator lamp H2, and a normally open contact KT2-1 of the high material level alarm relay KT2 is connected in series with a coil of a material incoming forbidding relay K2 and then connected between the positive electrode and the negative electrode of the control loop. And two ends of the coil of the incoming material forbidding relay K2 are connected with an incoming material forbidding indicator lamp H5 in parallel. When the material bed height in the leacher is too high, the high material level switch LT-H is triggered to be closed, the high material level alarm indicator lamp H2 is lightened, meanwhile, the coil of the high material level alarm relay KT2 is electrified, the normally-open contact KT2-1 of the high material level alarm relay KT2 is closed, the coil of the incoming material forbidding relay K2 is electrified, the incoming material forbidding indicator lamp H5 is lightened, and a feeding stopping signal is sent to the feeding circuit.

A low material level switch LT-L of the material level transmitter LT is connected in series with a coil of a low material level alarm relay KT3 and then is connected between the positive and negative poles of a control loop, and two ends of the coil of the low material level alarm relay KT3 are connected in parallel with a low material level alarm indicator lamp H3. The normally closed contact KT3-1 of the low material level alarm relay KT3 is connected in series between the delay disconnection normally closed contact KT1-1 of the stall alarm delay relay and a coil of the main motor control relay K1. When the feeding mechanism breaks down to enable the material layer height in the leaching device to be too low, the low material level switch LT-L is triggered to be closed, the low material level alarm indicator lamp H3 is lightened, meanwhile, the coil of the low material level alarm relay KT3 is electrified, the normally closed contact KT3-1 of the low material level alarm relay KT3 is in delayed disconnection, the coil of the main motor control relay K1 is powered off, and the frequency converter VFD stops working to enable the annular chain to stop advancing.

And the low oil pressure alarm switch PT-L is connected in series with a fourth normally open contact K1-4 of a main motor control relay and then connected in parallel with the super oil pressure alarm switch PT-H. When the hydraulic oil supply main pipe is over-pressurized, the over-oil pressure alarm switch PT-H is closed to enable the hydraulic system fault indicator lamp H4 to be lightened; when the fourth normally open contact K1-4 of the main motor control relay is in a suction state, namely the hydraulic oil pump motor M1 is in a working state, if the pressure of the hydraulic oil supply main pipe is too low, the low oil pressure alarm switch PT-L is closed, and the hydraulic system fault indicator lamp H4 is also lightened.

As shown in fig. 19, the comparison relay SSR includes a power module, a CPU, a communication module, an input module, and a relay driving module; the power supply module converts DC24V into DC 5V working voltage and provides the working voltage for each module; the CPU converts the two paths of analog signals transmitted by the input module into digital signals, then compares and judges the calculation results, and outputs low level to the relay driving module to drive the fault contact of the comparison signal to act if the error of the two paths of signal values exceeds an allowable value; the communication module downloads the program into the CPU or uploads the data and the working state in the CPU to the upper computer; the input module converts the received two paths of current signals of 4-20mA into voltage signals of 0-5V respectively, and sends the voltage signals to two paths of analog signal input ends of a CPU (central processing unit), and the signal isolation function is achieved; and the relay driving module receives the low-level control signal sent by the CPU and enables the comparison signal fault contact to generate a closing action after excitation amplification.

The communication module downloads a program into a CPU, a first signal source input end AI1 of the input module receives an analog signal output by a frequency converter VFD, namely a driving analog signal, a second signal source input end AI2 of the input module receives the analog signal sent by a speed transmitter SST and an actual chain advancing speed analog signal, the input module respectively converts two received current signals of 4 to 20mA into voltage signals of 0 to 5V and sends the voltage signals to two analog signal input ends P1.1 and P1.2 of the CPU; the CPU converts two DC 0-5V analog signals transmitted by the input module into 10-bit digital signals, calculates according to respective measuring ranges, then compares and judges the calculation results, if the error of the two signal values exceeds an allowable value, P0.5 outputs low level to be transmitted to the relay driving module, and the relay driving module drives a comparison signal fault contact to be closed; the communication module can upload data and working states in the CPU to the upper computer.

The power module adopts an LM7805 voltage-stabilizing block, the CPU adopts an STC15F2K60S2 single chip microcomputer, the communication module adopts an MAX485 chip, and the input module adopts a WS1521 signal isolator. The velocity transmitter SST can adopt KFU8-FSSP-1 type, and the brand is Beijiafu P + F.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.

Claims

1. The utility model provides a modularization annular leaches ware, includes leaches ware casing and is located the annular chain that leaches in the ware casing, evenly install a plurality of scraper blades on the annular chain, its characterized in that: the extractor shell is formed by mutually splicing a head box body, a feeding section, an upper extraction section, a lower extraction section, a draining section and a tail box body, wherein the upper layer of the annular chain is positioned in the feeding section and the upper extraction section, and the lower layer of the annular chain is positioned in the lower extraction section and the draining section; the right port of the feeding section and the right port of the draining section are respectively connected with the upper end and the lower end of the head box body through flanges, the left port of the upper leaching section and the left port of the lower leaching section are respectively connected with the upper end and the lower end of the tail box body through flanges, the left port of the feeding section and the right port of the upper leaching section are connected through flanges, and the right port of the lower leaching section and the left port of the draining section are connected through flanges; the upper part of the right end of the feeding section is connected with a material storage box, the top of the material storage box is provided with a feeding hole, and the bottom of the head box body is provided with a discharging hole; and the top parts of the head box body, the feeding section, the upper leaching section and the tail box body are respectively provided with a tail gas outlet.

2. The modular annular extractor of claim 1, wherein: a lower driving shaft is arranged at the lower part of the head box body, a lower chain wheel is arranged on the lower driving shaft, and an upper guide device is arranged at the upper part of the head box body; an upper driving shaft is arranged at the upper part of the tail box body, an upper chain wheel is arranged on the upper driving shaft, a lower tensioning shaft is arranged at the lower part of the tail box body, a lower tensioning chain wheel is arranged on the lower tensioning shaft, and the annular chain is sequentially wound on the lower chain wheel, the upper guide device, the upper chain wheel and the lower tensioning chain wheel; the upper guide device is a slide rail or an upper tensioning chain wheel.

3. The modular annular extractor of claim 2, wherein: the upper driving shaft is driven by an upper hydraulic driving device, the lower driving shaft is driven by a lower hydraulic driving device, the upper hydraulic driving device and the lower hydraulic driving device are controlled by the same hydraulic pump station, oil inlets of the upper hydraulic driving device and the lower hydraulic driving device are respectively connected with a hydraulic oil supply main pipe through oil supply branch pipes, and oil return ports of the upper hydraulic driving device and the lower hydraulic driving device are respectively connected with a hydraulic oil return main pipe through oil return branch pipes; hydraulic power unit includes hydraulic tank, hydraulic oil pump and tribit four-way reversing valve, the hydraulic oil pump is by hydraulic oil pump motor drive, the meso-position function of tribit four-way reversing valve is the M type, the suction inlet of hydraulic oil pump with hydraulic oil tank's oil-out links to each other and hydraulic oil tank's oil-out department installs the oil absorption filter, the export of hydraulic oil pump pass through the check valve with the P mouth of tribit four-way reversing valve links to each other, the T mouth of tribit four-way reversing valve with hydraulic oil tank's oil return opening links to each other, the A mouth of tribit four-way reversing valve with the hydraulic oil supply oil house steward links to each other, the B mouth of tribit four-way reversing valve with the hydraulic oil return oil house steward links to each other.

4. The modular annular extractor of claim 2, wherein: the material stirring device comprises an upper driving shaft, a lower driving shaft and a stirring rod, wherein the upper driving shaft and the lower driving shaft are respectively and uniformly provided with a plurality of material stirring devices along the axial direction, each material stirring device comprises a clamping shell which is encircled and connected to the periphery of the upper driving shaft or the lower driving shaft, the periphery of each clamping shell is respectively and symmetrically provided with the stirring rod which extends outwards along the radial direction, and the end part of each stirring rod is respectively connected with a blade which is perpendicular to the axial line of the stirring rod.

5. The modular annular extractor of claim 1, wherein: the scraper extends along the breadth direction of the leacher, two ends of the scraper are respectively and fixedly connected to outer chain plates of the annular chain, the outer chain plates are hinged to the outer sides of the inner chain plates through chain pins, chain rollers are respectively sleeved in the middle of the chain pins, and wear-resistant sliding blocks are respectively fixed at the top parts of the scraper and the corresponding parts of the chain rollers; an upper grid plate is arranged below the upper layer of the annular chain, and an upper sliding rail which is in contact with the chain roller is embedded in the upper grid plate; and a lower grid plate is arranged below the lower scraper plate, and a lower sliding rail in contact with the wear-resistant sliding block is embedded on the lower grid plate.

6. The modular annular extractor of claim 2, wherein: the lower drive shaft is located on the right side directly below the upper guide device, and the lower tensioning shaft is located on the left side directly below the upper drive shaft; the right side of the upper driving shaft is provided with a slide carriage which is butted with the left end of the upper grid plate, the lower end of the slide carriage inclines leftwards, a material baffle which inclines rightwards is arranged between the lower end of the slide carriage and the lower tensioning shaft, and a blind plate which is horizontally butted with the lower grid plate is arranged under the lower end of the material baffle.

7. The modular annular extractor of claim 6, wherein: a new solvent spraying groove is arranged below the top wall of the middle part of the draining section, the inlet of the new solvent spraying groove is connected with a new solvent pipe, a draining section spraying groove is arranged below the top wall of the left part of the draining section, a draining section oil hopper is arranged below a grid plate of the draining section, the bottom of the draining section oil hopper is connected with the inlet of a draining section circulating pump, and the outlet of the draining section circulating pump is connected with the inlet of the draining section spraying groove; a plurality of lower leaching section oil hoppers are sequentially arranged below the grid plate of the lower leaching section, a multi-stage lower leaching section spraying groove is arranged below the top wall of the lower leaching section, the bottom of each lower leaching section oil hopper is respectively connected with the inlet of a lower leaching section circulating pump, and the outlet of each lower leaching section circulating pump is respectively connected with the inlet of the corresponding upper lower leaching section spraying groove; the bottom of the tail box body is provided with a tail box body oil hopper, an upper self-circulation spraying groove is arranged above the upper end of the slide carriage, a lower self-circulation spraying groove is arranged above a lower layer material of the tail box body, an off-line spraying groove is arranged below the left top wall of the upper leaching section, the bottom of the tail box body oil hopper is connected with an inlet of a tail box body circulating pump, and an outlet of the tail box body circulating pump is respectively connected with inlets of the upper self-circulation spraying groove, the lower self-circulation spraying groove and the off-line spraying groove through valves; a plurality of upper leaching section oil hoppers are sequentially arranged below the grid plate of the upper leaching section, a multi-stage upper leaching section spraying groove is arranged below the top wall of the upper leaching section, the bottom of each upper leaching section oil hopper is respectively connected with the inlet of an upper leaching section circulating pump, and the outlet of each upper leaching section circulating pump is respectively connected with the inlet of the corresponding upper leaching section spraying groove above the upper leaching section circulating pump; the upper part of the left side wall of the upper leaching section oil hopper is connected with an over-line oil supplementing pipe, and the inlet of the over-line oil supplementing pipe is connected with the outlet of the tail box body circulating pump; the left side of the oil bucket of the draining section overflows to the lower leaching section oil bucket at the rightmost side, the lower leaching section oil bucket overflows step by step from the right to the left, and the lower leaching section oil bucket at the leftmost side overflows to the oil bucket of the tail box body; and the upper leaching section oil hopper overflows step by step from left to right.

8. The modular annular extractor of claim 7, wherein: a left feeding section oil hopper and a right feeding section oil hopper are arranged below a grid plate of the feeding section, a left feeding section spraying groove and a right feeding section spraying groove are arranged below the top wall of the feeding section, the upper leaching section oil hopper on the rightmost side overflows to the right feeding section oil hopper through a aqueduct, and the right feeding section oil hopper overflows to the left feeding section oil hopper; the bottom of the right feeding section oil hopper is connected with an inlet of a right feeding section circulating pump, and an outlet of the right feeding section circulating pump is connected with an inlet of the left feeding section spray tank; the bottom of the left feeding section oil hopper is connected with the inlet of the left feeding section circulating pump, and the outlet of the left feeding section circulating pump is connected with the inlet of the right feeding section spray tank.

9. The modular annular extractor of claim 8, wherein: an upper overflow port of the left feeding section oil hopper is connected with an inlet of an oil outlet pump of the leacher through an overflow pipeline, an outlet of the oil outlet pump of the leacher is connected with an inlet of a primary hydrocyclone separator, an outlet of the primary hydrocyclone separator is connected with an inlet of a secondary hydrocyclone separator, an outlet of the secondary hydrocyclone separator is connected with an inlet at the top of a temporary storage tank, an oil outlet at the lower part of the temporary storage tank is connected with an inlet of a mixed oil extraction pump, and an outlet of the mixed oil extraction pump is connected with an inlet of an evaporation system; the bottom emptying ports of the primary hydrocyclone separator, the secondary hydrocyclone separator and the temporary storage tank are respectively connected with a backflow header pipe, an overflow port of the temporary storage tank is also connected with the backflow header pipe, and an outlet of the backflow header pipe is connected with an inlet of the right feeding section spray groove.

10. The modular annular extractor of any of claims 1 to 9, wherein: the material rake device is characterized in that rake devices for scraping the top surface of a material layer are respectively arranged below the top walls of the feeding section, the upper leaching section, the lower leaching section and the draining section, each rake device comprises a rake body, the rake body is provided with a horizontal lower edge inclined towards the incoming material direction, a plurality of rake teeth inserted into the material layer are uniformly connected to the horizontal lower edge, the upper end of the rake body is hung on a rake horizontal shaft, two ends of the rake horizontal shaft are hinged to a rake support, and the rake support is fixed to the leacher shell.

11. The modular annular extractor of claim 3, wherein: the hydraulic oil pump motor (M1) is driven by a frequency converter (VFD), the frequency converter (VFD) is controlled by a control loop, a start button (SB 1) and a stop button (SB 2) are sequentially connected in series between a live wire and a zero line of the control loop, a fault disconnection contact of the frequency converter (VFD), a delay disconnection normally-closed contact (KT 1-1) of a stall alarm delay relay and a coil of a main motor control relay (K1), two ends of the start button (SB 1) are connected in parallel with a self-protection contact (K1-1) of the main motor control relay, and a second normally-open contact (K1-2) of the main motor control relay is connected in series with a start signal input end of the frequency converter (VFD); the material level signal output end of the material Level Transmitter (LT) is connected with the analog signal input end (AI) of the frequency converter (VFD), and the analog signal output end (AO) of the frequency converter (VFD) is connected with the first signal source input end (AI 1) of the comparison relay (SSR); the signal end output end of a speed measuring switch (ZS) for detecting the advancing speed of the leacher chain is connected with the signal input end of a speed transmitter (SST), and the signal output end of the speed transmitter (SST) is connected with a second signal source input end (AI 2) of a comparison relay (SSR); a comparison signal fault contact of the comparison relay (SSR) is connected in series with a third normally open contact (K1-3) of a main motor control relay and a coil of the stall alarm delay relay (KT 1) and then is connected between a live wire and a zero wire of a control loop; a high material level switch (LT-H) of the material Level Transmitter (LT) is connected in series with a coil of a high material level alarm relay (KT 2) and then is connected between a live wire and a zero line of a control loop, and a normally open contact (KT 2-1) of the high material level alarm relay (KT 2) is connected in series with a coil of a feeding forbidding relay (K2) and then is connected between the live wire and the zero line of the control loop; the low material level switch (LT-L) of the material Level Transmitter (LT) is connected between a live wire and a zero line of a control loop after being connected with a coil of the low material level alarm relay (KT 3) in series, and a normally closed contact (KT 3-1) of the low material level alarm relay (KT 3) is connected between a delay disconnection normally closed contact (KT 1-1) of the stall alarm delay relay and a coil of the main motor control relay (K1) in series.

12. The modular annular extractor of claim 11, wherein: the comparison relay (SSR) comprises a power supply module, a CPU, a communication module, an input module and a relay driving module; the power supply module converts DC24V into DC 5V working voltage and provides the working voltage for each module; the CPU converts the two paths of analog signals transmitted by the input module into digital signals, then compares and judges the calculation results, and outputs low level to the relay driving module to drive the fault contact of the comparison signal to act if the error of the two paths of signal values exceeds an allowable value; the communication module downloads a program into the CPU or uploads data and working states in the CPU to an upper computer; the input module converts the received two paths of current signals of 4-20mA into voltage signals of 0-5V respectively, and sends the voltage signals to two paths of analog signal input ends of a CPU (central processing unit), and the signal isolation function is achieved; and the relay driving module receives a low-level control signal sent by the CPU and enables the comparison signal fault contact to generate a closing action after excitation amplification.