CN104773509A - System and method for conveying fluidized parallel storehouse pumps - Google Patents
System and method for conveying fluidized parallel storehouse pumps Download PDFInfo
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- CN104773509A CN104773509A CN201510170972.XA CN201510170972A CN104773509A CN 104773509 A CN104773509 A CN 104773509A CN 201510170972 A CN201510170972 A CN 201510170972A CN 104773509 A CN104773509 A CN 104773509A
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Abstract
The invention discloses a system and a method for conveying fluidized parallel storehouse pumps. Through the system, the problem that coarse particle pulverized fuel ash is difficult to convey is solved, the conveying efficiency is increased, and the system is stable and reliable. The method is efficient and economic in conveying conventional particles. The system for conveying the fluidized parallel storehouse pumps comprises multiple parallel conveying units, wherein each conveying unit comprises two to four warehouse pumps, an air inlet main valve (30), a compressed air main pipe (90), a conveying main pipe (51) and a material outlet main valve (26); each warehouse pump comprises a body (20), a material inlet valve (21), a level gage (22) and an air bleeding valve (25); the system is characterized in that the warehouse pumps of each conveying unit are mutually connected in parallel; the upper part of each warehouse pump is provided with a pressurizing valve (23), and the bottom part of each warehouse pump is provided with a fluidization valve (24); the pressurizing valve and the fluidization valve are connected in parallel from the compressed air main pipe (90); a material outlet elbow pipe (27) is inserted in each warehouse pump; an upper opening of the material outlet elbow pipe (27) is horizontally connected into a conveying pipeline.
Description
technical field:
The present invention relates to Geldart-D particle field, particularly relate to a kind of thermal power plant fly ash positive pneumatic conveying system and method.
background technology:
Geldart-D particle is the principle utilizing Dual-Phrase Distribution of Gas olid, using pressurized air as carrier and power, by powder (grain) shape mass transport to object storage container.Pneumatic Conveying Technology is mainly divided into negative-pressure pneumatic conveying, pressure-fired Geldart-D particle, positive pneumatic transport etc., and fluidization storehouse in parallel transport pump system is a kind of form of malleation conveying.The advantages such as positive pneumatic conveying system is low with its air consumption, conveying output capacity is large, fed distance is far away, pipe wear is little, are used widely in industries such as thermoelectricity generating, chemical industry, medicine and food.
The air-transport system of prior art, adopts the mode of multiple stage storehouse series connection of pumps.For positive pneumatic conveying system under thermal powerplant electric duster ash bucket, as shown in Figure 1, its operating procedure is: the access valve 21 ' of storehouse pump 20 ' is opened, material loads storehouse pump 20 ' from electric duster ash bucket 10 ' by gravity, level-sensing device 22 ' is provided with in storehouse pump 20 ', after storehouse pump 20 ' is filled, level-sensing device 22 ' triggers, access valve 21 ' cuts out, conveying air is dispensed to the laggard pump 20 ' that puts in storage of each function tracheae by master air suction valve 30 ', and the material in storehouse pump 20 ' is transported to distant place Hui Ku by delivery duct 50 '.Delivery duct 50 ' top is equipped with pressure transformer, and after in pipeline, delivery pressure reduces, current delivery cycle completes.Then storehouse pump 20 ' is feeded again, starts next delivery cycle.
Geldart-D particle is to the granularity and the concentration sensitive that are transferred material.For the cinder that Boiler Electrostatic Precipitator produces, prior art needs to reduce conveying output capacity, increases gas consumption amount and maintains operation; Fallout after stopping transport for electric dust collector fault and the cinder in economizer region, prior art delivery ratio is more difficult, poor to various adaptability for working condition.
summary of the invention:
The invention provides a kind of fluidization storehouse in parallel transport pump system, system solves the problem the problem of coarse particle fly ash difficulty conveying, improve transport efficiency, and system stability is reliable.
Another object of the present invention is to provide the carrying method of above-mentioned fluidization storehouse in parallel transport pump system, and the method is high-efficiency and economic when carrying conventional granulates.
Concrete technical scheme of the present invention is as follows:
Fluidization of the present invention storehouse in parallel transport pump system, this system comprises multiple supply units in parallel, each supply unit comprises 2-4 platform storehouse pump, air inlet main valve (30), pressurized air mother's pipe (90), the female pipe of conveying (51) and discharging main valve (26), every platform storehouse pump comprises body (20), inlet valve (21), level-sensing device (22), blow off valve (25), parallel with one another between each storehouse pump of each supply unit, pump top, every platform storehouse establishes pressurizing valve (23) and bottom to establish fluidisation valve (24), pressurizing valve and the parallel connection of fluidisation valve are drawn from pressurized air mother's pipe (90), discharging elbow (27) is also fitted with in the pump of every platform storehouse, discharging elbow (27) level access suitable for reading transfer line.
Further design of the present invention is, described discharging elbow end opening is positioned at directly over the pump fluidized disk of storehouse, and leaves gap (being commonly called as water chestnut height) between, and the internal diameter of this clearance height to be 0.8 ~ 1.2D, D be discharging elbow, controls initialization concentration; Discharging elbow upper and lower is bend pipe, and their radius of curvature is 12-18D, and D is the internal diameter of discharging elbow.
Further design of the present invention is, the fluidized disk bottom the pump of storehouse comprises middle fluidisation felt, up-hole plate and orifice plate, is formed by stacking by three layers.
Further design of the present invention is, in this system, air inlet main valve (30) upstream connects source of the gas through gas source and flow amount allocation component (40), and downstream connects pressurized air mother pipe, controls the air feed to each supply unit; Gas source and flow amount allocation component (40) comprises the Self-driven pressure-adjusting valve (41) be successively set on pipeline, compression indicator (43) and breaker plate (42).
Further design of the present invention is, concentration stabilize valve group (70) is installed at the ash pipeline top of this system, and the material bolt in adjustment delivery duct is to optimum length.
Further design of the present invention is, this system is also provided with blows stifled valve group (60), and its upstream connects source of the gas, when there is serious material bolt blocking in delivery duct, passes into pressurized air and forces broken block.
This system is also provided with back suction valve group (80), its connecting conveying pipe road, upstream, and its downstream is through connecting electric duster ash bucket.Blow stifled valve group (60) blow stifled obstructed time, back suction valve group (80) will expect bolt suction dust collector ash hopper, realize forcing broken bolt.
The a set of delivery system according to setting logic operation of multiple supply unit composition parallel with one another.
The carrying method of above-mentioned fluidization storehouse in parallel transport pump system, the method comprises following process:
1) charging stage:
Open the blow off valve of supply unit each storehouse pump, time delay 2-7 opens inlet valve (21) afterwards and feed in the multiple stage storehouse pump of parallel connection second, treats that the full signal of level-sensing device (22) issuance of materials or charge time arrive, closes inlet valve (21) simultaneously;
2) stage is waited in line:
During multiple supply unit combination transfer, then alternately need to queue up conveying according to the principle of " transmission exert oneself largest unit priority queue ";
3) delivery phase:
Open air inlet main valve (30) and be pressurized to setting value to storehouse pump and subsidiary pipeline 91;
Open the bleeder valve 26 on delivery duct, carry out mass transport;
Close air inlet main valve (30) when line pressure drops to setting value at the end of carrying, the several seconds 2-7 of unlatching delay simultaneously closes bleeder valve (23) after second;
4) the unimpeded stage:
All valves of system closing supply unit, open conveying female pipe (51) back suction valve group (80), back suction and the loose material be blocked in pipeline, open after line pressure drops to null value and blow stifled valve group (60) pressure purging, if drop to setting value in the female pipe of setting-up time (about 30 ~ 60 seconds) conveying (51) force value, then close after postponing 2-7 second and blow stifled valve group (60) and exit unimpeded step; If do not declined in the female pipe of setting-up time (about 60 ~ 90 seconds) conveying (51) force value, then continue unlatching conveying female pipe (51) back suction valve group (80) and carry out back suction and loosen, repeat just to blow and back suction step.
10, carrying method according to claim 9, wherein, above-mentioned steps 3) in delivery phase, concentration stabilize valve group (70) is according to Cemented filling fluidised form with getting involved and exiting, and when there is the phenomenon of plugging, system proceeds to above-mentioned steps 4) the unimpeded stage.
In the present invention, the transmission principle brief description of storehouse pump is: inlet point (21) is opened, material falls in the pump housing because of Action of Gravity Field, after inlet point is closed, material pressurization is fluidised to setup pressure value by pressurized air, bleeder valve (23) triggers and opens, material is realized material by the discharge nozzle press-in transporting elbow from fluidized disk and carries in order, from delivery duct pressure visual supervisory control feed status.The feature of fluidized pump comprises (1) storehouse pump has fluidisation and pressurization two pressurized airs to get involved point, can carry out fully " disturbance " to material, avoid " dead band " problem that conventional storehouse pump easily occurs; (2) fluosolids bottom the pump of storehouse is one deck breaker plate to folder highly-breathable fluidisation felt, when pressurized air blows over fluosolids from bottom evenly loose to powder in the pump of storehouse, suspend and abundant aeration; (3) pump discharging opening in storehouse is positioned at directly over fluidized disk, and height (being commonly called as water chestnut height) between the two controls initialization concentration; (4) storehouse pump discharging elbow radius of curvature is about 12-18D, is not only conducive to static pressure lifting material bolt and contributes to there is initial velocity when material proceeds to levelling pipe, avoiding the phenomenon of discharging plugging.
the present invention compared to existing technology tool has the following advantages:
1, the present invention devises gas source and flow amount allocation component, avoids the interference of robbing gas He collaborating when many supply units share same source of the gas.Total source of the gas being carried out rationed according to the air consumption requirement of each supply unit, between each supply unit, the not smooth and over worn problem of conveying can not be caused because collaborating;
2, devise can in bottom by the fluid tank pump configuration of abundant for material fluidisation in the present invention, and the discharge nozzle of multiple stage storehouse pump is connected in parallel on a female pipe of conveying and sends simultaneously, gives full play to the maximum transmission capacity of pipeline;
3, devise concentration stabilize valve group in system, carry out appropriate tonifying Qi automatically in the conveying thick material stage according to ash pipe force value, stablize transportation concentration;
4, stifled valve group is blown in system, in the unexpected big ups and downs of material characteristic, when in pipeline there is plugging problem in conveying fluidised form unstability, system automatically switches to blows stifled mould pattern, blow the step dredging pipeline of stifled valve according to " first blow and take out afterwards ", and judge whether that whether pipeline is unobstructed according to line pressure, proceed to normal delivery mode after pipe-dredging.Such as when carrying the coarse particle flying dust in electric dust collector fallout and economizer region, delivery system is equipped with this valve group can avoid plugging in course of conveying and erosive wear problem.
5, in present system, the quantity of storehouse in parallel pump is two to four, and the parallel units be made up of multiple storehouses pump is connected on the female pipe of conveying, can be connected on a upper Alternating Transportation of female pipe by multiple supply unit, give full play to the maximum transmission capacity of pipeline.
6, method of the present invention, unimpeded pattern will be switched to when there is serious pipeline jam accident in automated system operation, open after system closes all valves automatically and blow stifled valve pressure purging, if line pressure does not decline after setting purge time, then close and blow stifled valve, open the negative pressure suck-back pipe choking material that back suction valve utilizes ash bucket, two, three circulations at most that circulate can be blown logical at least, blow logical rear system at pipeline and proceed to automatic transport pattern, reduce manual operation.
accompanying drawing illustrates:
Fig. 1 is the structural representation of existing a kind of positive pneumatic conveying system.
Fig. 2 is fluidization of the present invention storehouse in parallel transport pump system typical structure schematic diagram.
Fig. 3 a is fluidization of the present invention pump storehouse, storehouse in parallel pump birds-eye view.
Fig. 3 b is that material constitution diagram is pumped in storehouse.
Fig. 3 c is storehouse pump pressurization fluidisation constitution diagram.
Fig. 3 d is the local structure schematic diagram of Fig. 3 b storehouse pump fluidized disk.
Fig. 3 e is the structural representation of discharging elbow.
Fig. 4 a is gas source and flow amount allocation component structural representation of the present invention.
Fig. 4 b is the structural representation of breaker plate in gas source and flow amount allocation component.
Fig. 5 is the system architecture schematic diagram that of the present invention pair of storehouse parallel connection of pumps two unit share a female pipe conveying of conveying;
Fig. 6 is the system architecture schematic diagram of four storehouse parallel connection of pumps conveyings of the present invention;
Fig. 7 is the system architecture schematic diagram that of the present invention pair of storehouse parallel connection of pumps simplifies the conveying of concentration stabilize valve group;
Inlet point, pressurization mouth, exhausr port, level-sensing device mouth and discharging opening are arranged at pump top, storehouse, and fluidisation interface is arranged at bottom, docks with relevant device or pipeline according to function.
Each gas point breaker plate controls flow, breaker plate area more about than actual demand 10%, shutoff aperture microcall gas point flow during enforcement.
In figure: 10-dust collector ash hopper; 11-pressurizes interface; 12-fluidisation interface; 13-charging interface; 14-discharging interface; 15-material level interface; 16-exhaust port; 20-body; 21-inlet valve; 22-level-sensing device; 23-pressurizing valve; 24-fluidisation valve; 25-blow off valve; 26-bleeder valve; 27-discharging elbow; 28-fluidized disk; 281-up-hole plate; 282-fluidisation felt; 283-orifice plate; 30-air inlet main valve; 40-gas source and flow amount allocation component; 41-pressure regulating valve; 42-compression indicator; 43-breaker plate; 50-transfer line; The female pipe of 51-conveying; 60-blows stifled valve group; 70-concentration stabilize valve group; 80-back suction valve group; 90-pressurized air mother pipe; 91-subsidiary pipeline.
detailed description of the invention:
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Air-transport system is all very sensitive to being transferred the granularity of material, concentration and proportion, especially for material that is remote and coarseness, very high to the stability requirement of delivery system.Such as use high grey thermal coal generating at Southwestern China and the Northeast, flying dust granularity after this kind of coal combustion is comparatively thick and granularity is unstable, delivery system is made to be easy to blocking accident occurs, cause the severe accident that a large amount of dust stratification of ash bucket even collapses, therefore the requirement of this kind of engineering to the stability of delivery system is higher.
embodiment one:
As shown in Figure 2, the invention provides a kind of fluidization storehouse in parallel transport pump system, this system comprises many groups supply unit in parallel, each supply unit comprises two storehouse pumps, air inlet main valve 30, the female pipe 90 of pressurized air, carries female pipe 51 and discharging main valve 26, (giving a supply unit structure in figure) parallel with one another between two storehouse pumps of each supply unit.
Every platform storehouse pump comprises body 20, inlet valve 21, level-sensing device 22, blow off valve 25, pump top, every platform storehouse establishes pressurizing valve 23 and bottom to establish fluidisation valve 24, pressurizing valve and fluidisation valve 24 parallel connection are drawn from the female pipe 90 of pressurized air, discharging elbow 27 is also fitted with, discharging elbow 27 level access suitable for reading transfer line in the pump of every platform storehouse.
As Fig. 3 a, storehouse pump is provided with pressurization interface 11, fluidisation interface 12, charging interface 13, discharging interface 14, material level interface 15, exhaust port 16.As Fig. 3 d, the fluidized disk bottom the pump of storehouse comprises middle fluidisation felt 282, up-hole plate 281 and orifice plate 283, is formed by stacking by three layers.The needling structure of fluidisation felt has good permeability, pressurized air evenly can be passed into bottom the bed of material, make it abundant fluidisation, but the compactness of fluidisation felt also can stop trickle material to enter the air-purifying chamber of storehouse pump simultaneously.The uniform breather hole of upper orifice plate has good permeability to air, and the rigid construction simultaneously going up orifice plate can support and protect fluidisation felt.Be " labyrinth " hermetically-sealed construction between fluidized disk and storehouse pump interface flange, also effectively stop material to enter the possibility of air-purifying chamber from periphery " string ".
As shown in Fig. 3 b, 3c, 3e, in the present invention, discharging elbow end opening is positioned at directly over the pump fluidized disk of storehouse, and leaves gap (being commonly called as water chestnut height) between, and clearance height is 0.8 ~ 1.2D, and to control initialization concentration, D is the internal diameter of discharging elbow; Discharging elbow upper and lower is bend pipe, and their radius of curvature is 12-18D, and D is the internal diameter of discharging elbow.Discharging elbow bottom-to-top-height is greater than storehouse pump body height and is generally 3.5-5 rice, wherein epimere a arc length: stage casing (linear portion) b length: the proportionate relationship of hypomere c arc length is: 4 ~ 5:4:1, discharging elbow can adopt two sectional type to assemble.
This system also comprises gas source and flow amount allocation component 40, and its structure is as shown in Fig. 4 a, 4b, and source of the gas is dispensed to the admission port of each storehouse pump by air inlet main valve (30); Delivery duct 50 and storehouse pump, gas source pipe, blow blocked pipeline and be connected; The upper end interface of multiple stage storehouse in parallel pump is connected with delivery duct 50; Blow block apparatus 60 to be arranged on the delivery duct 50 in pump downstream, all storehouses.
Often overlap air-transport system and can arrange a gas source and flow amount allocation component 40, this assembly is made up of pressure regulating valve 41, compression indicator 42 and current plate 43.Pressure regulating valve 41 is Self-driven pressure-adjusting valves, and the actuating unit that it needs mensuration line pressure to feed back to self just can adjust valve opening, to ensure the pressure stability of breaker plate 42 upstream after contrast.Theoretical according to compressible fluid, when the upstream and downstream pressure ratio of breaker plate is greater than 1.83, be directly proportional to area by the flow of orifice plate.Therefore the pressure of orifice plate upstream can be set needed for system and after utilizing control cock lock pressure, the breaker plate that the supply unit required for difference arranges different area just can distribute corresponding charge air.This assembly is that positive feed back regulates, pressure regulating valve contrasts the line pressure value and setting value adjustment aperture that record, to lock the force value of the source of the gas of orifice plate upstream, when the pressure ratio of breaker plate upstream and downstream is greater than theoretical value, tolerance is directly proportional to flow area, and this regulative mode avoids mutual collaborating when multiple-unit shares the conveying of a set of source of the gas.
Fluidisation felt material special bottom the pump of storehouse and structure ensure pressurized air evenly through and leak without fly ash, bottom fluidization air and top compression air jointly disturb fly ash and suspend, realize low flow velocity static pressure bolt shape mode to send, the clear headroom of inner discharge nozzle and fluidisation felt controls the transmission concentration of material.
Concentration stabilize valve group is two groups of control cock groups in parallel, this valve group one end is communicated with compressed air gas source, one end is communicated with the female pipe top of conveying, one group is manually-operated gate, keep after adjusting aperture, another road is automatic valve, when there is plugging trend after material particular diameter is deteriorated, automatically open tonifying Qi, dilution tunnel concentration avoids the pipeline jam accident occurred.The coarse particle that this stabiliser can adapt to produce when using ash-rich coal, high specific gravity fly ash carry needs, have and adapt to very by force and self-regulation ability.
In the charging stage, first storehouse pump is feeded.Opened by storehouse pump inlet valve 21, material loads storehouse pump by gravity from dust collector ash hopper 10, is provided with level-sensing device in the pump of storehouse, when material is full or feed time arrive inlet valve closedown.After charging terminates, air inlet main valve (30) is opened pressurized air and simultaneously to be entered in the pump housing the abundant fluidisation of material and suspension in the pump of many storehouses through the pressurizing valve 23 at pump top, storehouse and the fluidisation valve 24 of bottom, opens defeated ash female pipe top discharge valve 26 convey materials when storehouse pump pressure rises to setting value.Load in the pump of storehouse carries out fine adjustment by the aperture proportioning of pressurizing valve 23 and fluidisation valve 24, and fluctuate less material under the condition of stable delivery duct pressure for conveying characteristic, strengthen load as far as possible, raising system is exerted oneself.
In the conveying starting stage, fluidized pump utilizes fluidized gas and adds to calm the anger and acts on coarse particle fly ash simultaneously, and make it and carry gas fully " stirring ", the bubble of fly ash surface adhesion reduces floating velocity.When discharging, fly ash and pressurized air suspended matter promote 4 ~ 5m under a static pressure to discharging mother pipe, and ash in this process/gas two-phase once fully stirs and fly ash has certain initial velocity, is conducive to long distance delivery in horizontal pipe.
Pneumatic conveying method of the present invention, comprises the following steps: in the pump of multiple stage storehouse in parallel, load fly ash; In the pump of storehouse, pouring pressurized air, carrying when arriving setting pressure, concentration stabilize valve group 70 stablizes the fly ash concentration in ash pipeline until conveying terminates.
This delivery system can comprise 2-4 supply unit, in parallel mutually between each supply unit, can share an air inlet main valve and gas source and flow amount allocation component between each unit.
embodiment two:
According to one embodiment of present invention (Fig. 5), under the dust exhaustor of Generator Set, there are 2 supply units, parallel with one another between two storehouse pumps of each supply unit, by two female pipes of the public conveying of supply unit, Alternating Transportation can be realized.When a unit terminates conveying, another unit starts conveying, has played the maximum transmission capacity of pipeline.Also supply unit can be increased as the case may be.
According to one embodiment of present invention (Fig. 5), an electric field carries cinder and ash quantity is comparatively large, and the ash of subsequent electric field is thin and ash quantity is less, and a corresponding electric field supply unit air demand is comparatively large, and all the other are then less.The breaker plate of source of the gas allocation component and different area can divide distribution capacity according to the air consumption of theory calculate to each supply unit automatically, and the air demand both having met supply unit requires and do not interfere with each other.
embodiment three:
According to one embodiment of present invention, but the delivery system of conveying moderate distance comparatively large for the demand of exerting oneself, the storehouse in parallel pump list group of each supply unit can reach four (Fig. 6), can to combine use by multiple supply unit, carry the fly ash in four storehouse pumps when opening bleeder valve simultaneously, decrease and carry switching time, played the maximum transmission capacity of storehouse pump and pipeline.
embodiment four:
According to one embodiment of present invention, material ingredient stability and be easy to conveying time, concentration stabilize device can be optimized for a manual modulation valve (Fig. 7), the aperture of valve locks in delivery phase by the feature according to material, supplement the maximum concentration that appropriate tolerance just can maintain pipeline, this optimization reduces complexity and and the cost of system when ensureing reliability.
embodiment five:
For the storehouse in parallel transport pump system of Fig. 2, illustrate that the carrying method process of fluidization of the present invention storehouse in parallel transport pump system is as follows: this delivery system also comprises PLC or DCS controller, and each valve is connected with PLC or DCS controller, realizes automatically controlling.
1) charging stage:
Open the blow off valve of supply unit each storehouse pump, the time delay several seconds (2-7 second) opens inlet valve (21) afterwards and feeds in the multiple stage storehouse pump of parallel connection simultaneously, treats that the full signal of level-sensing device (22) issuance of materials or charge time arrive, closes inlet valve (21);
2) stage is waited in line:
Multiple supply unit need according to the principle Alternating Transportation of " transmission exert oneself largest unit priority queue ";
3) delivery phase:
Open air inlet main valve (30) and be pressurized to setting value to storehouse pump and subsidiary pipeline;
Open the bleeder valve 26 on delivery duct, carry out mass transport;
Close air inlet main valve (30) when line pressure drops to setting value at the end of carrying, open delay several seconds (2-7 second) simultaneously and close bleeder valve (23) afterwards;
4) the unimpeded stage:
All valves of system closing supply unit, open conveying female pipe (51) back suction valve group (80), back suction and the loose material be blocked in pipeline, open after line pressure drops to null value and blow stifled valve group (60) pressure purging, if drop to setting value in the female pipe of setting-up time (about 30 ~ 60 seconds) conveying (51) force value, then postponing the several seconds (2-7 second) closes afterwards and blows stifled valve group (60) and exit unimpeded step; If do not declined in the female pipe of setting-up time (about 60 ~ 90 seconds) conveying (51) force value, then continue unlatching conveying female pipe (51) back suction valve group (80) and carry out back suction and loosen, repeat just to blow and back suction step.
8, carrying method according to claim 7, wherein, above-mentioned 3), in delivery phase, concentration stabilize valve group 70 is according to Cemented filling fluidised form with getting involved and exiting, and when there is the phenomenon of plugging, system proceeds to the unimpeded stage.
application example:
Be that high ash is low in calories in the coal source feature of Yunnan Province of China high altitude region, the fly ash grain that the burning of these coals generates is thick, than great.In the fed distance of 600MW unit equivalent distance more than 800, adopt the storehouse in parallel transport pump system of Fig. 2 of the present invention, fly ash flowing power after the fluidization period of fluidized pump strengthens, and the starting velocity of conveying reduces a lot, reduces long distance delivery difficulty; The pressure change tread tonifying Qi of concentration stabilize device all the time according to delivery duct in course of conveying, maintains the most economical failure-free transportation concentration that pipeline begins, and the cinder achieving very difficult Geldart-D particle realizes continuous print and to exert oneself greatly conveying.
Claims (10)
1. a fluidization storehouse in parallel transport pump system, this system comprises multiple supply units in parallel, each supply unit comprises 2-4 platform storehouse pump, air inlet main valve (30), pressurized air mother's pipe (90), the female pipe of conveying (51) and discharging main valve (26), every platform storehouse pump comprises body (20), inlet valve (21), level-sensing device (22), blow off valve (25), it is characterized in that: parallel with one another between each storehouse pump of each supply unit, pump top, every platform storehouse establishes pressurizing valve (23) and bottom to establish fluidisation valve (24), pressurizing valve and the parallel connection of fluidisation valve are drawn from pressurized air mother's pipe (90), discharging elbow (27) is also fitted with in the pump of every platform storehouse, discharging elbow (27) level access suitable for reading transfer line.
2. fluidization storehouse in parallel transport pump system according to claim 1, it is characterized in that: described discharging elbow end opening is positioned at directly over the pump fluidized disk of storehouse, and leave gap (being commonly called as water chestnut height) between, this clearance height is 0.8 ~ 1.2D, D is the internal diameter of discharging elbow, controls initialization concentration; Discharging elbow upper and lower is bend pipe, and their radius of curvature is 12-18D, and D is the internal diameter of discharging elbow.
3. fluidization storehouse in parallel transport pump system according to claim 1, is characterized in that: the fluidized disk bottom the pump of storehouse comprises middle fluidisation felt, up-hole plate and orifice plate, is formed by stacking by three layers.
4. fluidization storehouse in parallel transport pump system according to claim 1, it is characterized in that: in this system, air inlet main valve (30) upstream connects source of the gas through gas source and flow amount allocation component (40), downstream connects pressurized air mother pipe, controls the air feed to each supply unit; Gas source and flow amount allocation component (40) comprises the Self-driven pressure-adjusting valve (41) be successively set on pipeline, compression indicator (43) and breaker plate (42).
5. fluidization storehouse in parallel transport pump system according to claim 1, it is characterized in that: concentration stabilize valve group (70) is installed at the ash pipeline top of this system, the material bolt in adjustment delivery duct is to optimum length.
6. fluidization storehouse in parallel transport pump system according to claim 1, it is characterized in that: this system is also provided with blows stifled valve group (60), its upstream connects source of the gas, when there is serious material bolt blocking in delivery duct, passes into pressurized air and forces broken block.
7. fluidization storehouse in parallel transport pump system according to claim 1, it is characterized in that: this system is also provided with back suction valve group (80), its connecting conveying pipe road, upstream, its downstream is through connecting electric duster ash bucket;
Blow stifled valve group (60) blow stifled obstructed time, back suction valve group (80) will expect bolt suction dust collector ash hopper, realize forcing broken bolt.
8. fluidization storehouse in parallel transport pump system according to claim 1, is characterized in that: a set of delivery system according to setting logic operation of multiple supply unit composition parallel with one another.
9. the carrying method of the storehouse in parallel of fluidization described in claim 1 transport pump system, the method comprises following process:
1) charging stage:
Open the blow off valve of supply unit each storehouse pump, time delay 2-7 opens inlet valve (21) afterwards and feed in the multiple stage storehouse pump of parallel connection second, treats that the full signal of level-sensing device (22) issuance of materials or charge time arrive, closes inlet valve (21) simultaneously;
2) stage is waited in line:
During multiple supply unit combination transfer, then alternately need to queue up conveying according to the principle of " transmission exert oneself largest unit priority queue ";
3) delivery phase:
Open air inlet main valve (30) and be pressurized to setting value to storehouse pump and subsidiary pipeline 91;
Open the bleeder valve 26 on delivery duct, carry out mass transport;
Close air inlet main valve (30) when line pressure drops to setting value at the end of carrying, the several seconds 2-7 of unlatching delay simultaneously closes bleeder valve (23) after second;
4) the unimpeded stage:
All valves of system closing supply unit, open conveying female pipe (51) back suction valve group (80), back suction and the loose material be blocked in pipeline, open after line pressure drops to null value and blow stifled valve group (60) pressure purging, if drop to setting value in the female pipe of setting-up time (about 30 ~ 60 seconds) conveying (51) force value, then close after postponing 2-7 second and blow stifled valve group (60) and exit unimpeded step; If do not declined in the female pipe of setting-up time (about 60 ~ 90 seconds) conveying (51) force value, then continue unlatching conveying female pipe (51) back suction valve group (80) and carry out back suction and loosen, repeat just to blow and back suction step.
10. carrying method according to claim 9, wherein, above-mentioned steps 3) in delivery phase, concentration stabilize valve group (70) is according to Cemented filling fluidised form with getting involved and exiting, and when there is the phenomenon of plugging, system proceeds to above-mentioned steps 4) the unimpeded stage.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105173742A (en) * | 2015-09-09 | 2015-12-23 | 上海隆麦机械设备工程有限公司 | Novel large bin pump for pneumatic material conveying system |
| CN107138282A (en) * | 2017-06-13 | 2017-09-08 | 中国华电科工集团有限公司 | A kind of dust collector ash hopper communication apparatus |
| CN107816635A (en) * | 2017-12-01 | 2018-03-20 | 中国电力工程顾问集团西北电力设计院有限公司 | Become the anti-blocking making-up air device of absolute altitude ash conveying pipe and anti-blocking supplementing method for air over long distances |
| CN111703900A (en) * | 2020-07-02 | 2020-09-25 | 华东理工大学 | Pneumatic conveying method |
| CN112794082A (en) * | 2021-01-26 | 2021-05-14 | 福建龙净环保股份有限公司 | Cabin pump, pneumatic conveying system and method for measuring mass of materials in cabin pump |
| CN112830260A (en) * | 2020-12-31 | 2021-05-25 | 江苏久晟环保设备有限公司 | Positive-blowing reverse-pumping type blockage removing system |
| CN114035517A (en) * | 2021-10-21 | 2022-02-11 | 中石化宁波工程有限公司 | Control system and method for conveying materials by multiple bin pumps |
| CN114348668A (en) * | 2022-01-05 | 2022-04-15 | 国家能源集团国源电力有限公司 | Ash conveying control method and control device |
| CN115815246A (en) * | 2022-12-05 | 2023-03-21 | 核工业理化工程研究院 | Reverse purging method and device for blocking of negative pressure vacuum pipeline |
| CN116081309A (en) * | 2023-04-11 | 2023-05-09 | 常州伊泽博格粉体设备有限公司 | Energy-saving dense-phase pneumatic conveying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105173742A (en) * | 2015-09-09 | 2015-12-23 | 上海隆麦机械设备工程有限公司 | Novel large bin pump for pneumatic material conveying system |
| CN107138282A (en) * | 2017-06-13 | 2017-09-08 | 中国华电科工集团有限公司 | A kind of dust collector ash hopper communication apparatus |
| CN107816635A (en) * | 2017-12-01 | 2018-03-20 | 中国电力工程顾问集团西北电力设计院有限公司 | Become the anti-blocking making-up air device of absolute altitude ash conveying pipe and anti-blocking supplementing method for air over long distances |
| CN111703900A (en) * | 2020-07-02 | 2020-09-25 | 华东理工大学 | Pneumatic conveying method |
| CN111703900B (en) * | 2020-07-02 | 2021-07-16 | 华东理工大学 | Pneumatic conveying method |
| CN112830260A (en) * | 2020-12-31 | 2021-05-25 | 江苏久晟环保设备有限公司 | Positive-blowing reverse-pumping type blockage removing system |
| CN112794082A (en) * | 2021-01-26 | 2021-05-14 | 福建龙净环保股份有限公司 | Cabin pump, pneumatic conveying system and method for measuring mass of materials in cabin pump |
| CN114035517A (en) * | 2021-10-21 | 2022-02-11 | 中石化宁波工程有限公司 | Control system and method for conveying materials by multiple bin pumps |
| CN114348668A (en) * | 2022-01-05 | 2022-04-15 | 国家能源集团国源电力有限公司 | Ash conveying control method and control device |
| CN115815246A (en) * | 2022-12-05 | 2023-03-21 | 核工业理化工程研究院 | Reverse purging method and device for blocking of negative pressure vacuum pipeline |
| CN116081309A (en) * | 2023-04-11 | 2023-05-09 | 常州伊泽博格粉体设备有限公司 | Energy-saving dense-phase pneumatic conveying system |
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