CN114602224A - Intrinsic safety type filtering and washing dual-purpose machine for energetic materials - Google Patents
Intrinsic safety type filtering and washing dual-purpose machine for energetic materials Download PDFInfo
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- CN114602224A CN114602224A CN202210078295.9A CN202210078295A CN114602224A CN 114602224 A CN114602224 A CN 114602224A CN 202210078295 A CN202210078295 A CN 202210078295A CN 114602224 A CN114602224 A CN 114602224A
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- filter disc
- lower cylinder
- washing
- filtering
- energetic material
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- 239000000463 material Substances 0.000 title claims abstract description 56
- 238000005406 washing Methods 0.000 title claims abstract description 37
- 238000001914 filtration Methods 0.000 title claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 51
- 239000012452 mother liquor Substances 0.000 claims abstract description 38
- 238000005507 spraying Methods 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000012065 filter cake Substances 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 8
- 230000008021 deposition Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000005245 sintering Methods 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- 229910017604 nitric acid Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 1
- SPSSULHKWOKEEL-UHFFFAOYSA-N 2,4,6-trinitrotoluene Chemical compound CC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O SPSSULHKWOKEEL-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 239000000028 HMX Substances 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
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- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- UZGLIIJVICEWHF-UHFFFAOYSA-N octogen Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)CN([N+]([O-])=O)C1 UZGLIIJVICEWHF-UHFFFAOYSA-N 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000000015 trinitrotoluene Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/085—Funnel filters; Holders therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/78—Handling the filter cake in the filter for purposes other than for regenerating for washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of energetic material treatment, in particular to an intrinsically safe energetic material filtering and washing dual-purpose machine. The invention comprises a lower cylinder and an upper cylinder, wherein the upper cylinder and the lower cylinder enclose together to form a filtering and washing cavity; a filter disc is arranged at the lower cylinder body, so that a filtering and washing cavity is divided into a working cavity positioned at the upper part of the filter disc and a mother liquor collecting cavity positioned at the lower part of the filter disc; the filter disc is in a bell mouth shape with a large caliber at the top and a small caliber at the bottom, a small port positioned at the axle center of the filter disc forms a discharge port for discharging solid slurry, the discharge port is communicated with external material collecting equipment, and a switch valve for opening and closing the discharge port is arranged on the discharge port; the dual-purpose machine also comprises a stirring component with a stirring function and a spraying component for spraying the cleaning solution into the working cavity. The invention can realize the function of filtering and washing the energetic material, and simultaneously can effectively avoid the problem of deposition of filter cake particles, and has the advantages of safe and reliable work.
Description
Technical Field
The invention relates to the technical field of energetic material treatment, in particular to an intrinsically safe energetic material filtering and washing dual-purpose machine.
Background
The high-performance energetic materials comprise trinitrotoluene, hexogen, octogen, nitrogen-rich compounds and derivatives thereof and the like, and are the premise for improving the performance of advanced weapons. Different from common explosive substances, the material property is more sensitive, contains explosive groups, can react quickly, and has extremely strong destructive power; with some carelessness, it is a catastrophic result. The production process of the high-performance energetic material mainly adopts concentrated nitric acid to directly nitrate and hydrolyze urotropine, obtains the required energetic material crystal suspension through the procedures of nitric acid cooking, crystallization, deacidification, recrystallization and the like, obtains a crystal filter cake with certain moisture content through washing and filtering, and then obtains the final product through drying and grading. Washing and filtering are indispensable in the energetic material production process and are important processes related to the quality of final products. The crystal forms of the energetic materials are various, such as alpha crystal form, beta crystal form, gamma crystal form and the like, and different crystal forms show different physical properties, such as viscosity, fluidity, crystal volume, strength, explosion performance, stability and the like, and have great influence on the quality of the energetic materials. In the process of washing the energetic material, the washed mother liquor has certain viscosity, and crystals are easily separated out to form a wall hanging phenomenon; the filter cake crystals have different crystal forms, the particle size distribution is wider, and the coarse-particle-size crystal particles are easy to deposit, so that local solid accumulation is caused, and potential safety hazards are formed; in addition, in the washing and filtering process, the materials comprise concentrated nitric acid, water or organic solvents such as acetone, ethyl acetate and the like, the temperature is generally controlled to be below 100 ℃, equipment needs to have high temperature and pressure-bearing conditions, and the materials comprise hazardous chemical substances such as nitric acid, organic solvents such as acetone, ethyl acetate and the like, and also comprise various energetic materials with unstable performance and explosiveness in mixed crystal form. Therefore, the following requirements are required for the filtration and washing apparatus: firstly, the equipment needs to be closed, pressure-bearing and temperature-resistant. Secondly, the equipment needs to be intrinsically safe; if the contact part with the material cannot have the hidden troubles of extrusion or impact and the like, and cannot have hard friction, extrusion and the like; the full-automatic operation can be realized, no humanization in the production process is achieved, and the injury to people caused by accidents is avoided. Thirdly, the volume of the mother liquor collecting cavity is large, and the washed mother liquor flows smoothly to form a certain speed and is not easy to stop. Fourthly, coarse crystal particles in the filter cake are not easy to deposit, and a certain deposition space is provided. Finally, the traditional filter screen structure is flat-bottom type, and filter cake particles are easy to deposit due to the fact that the linear velocity at the center of a blade is small, so that a solid accumulation area is formed at the center of a filter disc; the mother liquor collecting cavity is small, and the bottom of the cavity is of a flat-bottom structure, so that the mother liquor is poor in liquidity and small in volume, and stagnation or dead angles of the mother liquor are easily formed, and crystals are separated out. The above situation is not suitable for the current needs and the technical development, and needs to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an intrinsically safe energetic material filtering and washing dual-purpose machine, which can effectively avoid the problem of deposition of filter cake particles while realizing the filtering and washing functions of the energetic materials and has the advantages of safe and reliable work.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a dual-purpose machine of intrinsic safety type energetic material filtration washing which characterized in that: the filter washing device comprises a lower barrel and an upper barrel which is detachably matched with the lower barrel, wherein the upper barrel and the lower barrel jointly enclose to form a filter washing cavity; a filter disc is arranged at the lower cylinder body, so that a filtering and washing cavity is divided into a working cavity positioned at the upper part of the filter disc and a mother liquor collecting cavity positioned at the lower part of the filter disc, and a liquid discharge port is correspondingly arranged at the lower cylinder body so as to be communicated with the mother liquor collecting cavity; the filter disc is in a bell mouth shape with a large caliber at the top and a small caliber at the bottom, a small port positioned at the axle center of the filter disc forms a discharge port for discharging solid slurry, the discharge port is communicated with external material collecting equipment, and a switch valve for opening and closing the discharge port is arranged on the discharge port; the dual-purpose machine also comprises a stirring component with a stirring function and a spraying component for spraying the cleaning solution into the working cavity.
Preferably, the stirring subassembly is including installing the agitator motor in last barrel top department, and agitator motor's (mixing) shaft is coaxial to run through again and to stretch into the work intracavity behind the barrel roof, and is located the radial concave cooperation groove that is equipped with of (mixing) shaft body department in the work intracavity, and the stirring rake welds admittedly after radially inserting the cooperation groove to make stirring rake and (mixing) shaft form integrative welding structure.
Preferably, in the axial direction of the stirring shaft, the distance between the stirring paddle and the filter disc is equal to 50 mm.
Preferably, the spraying assembly comprises a spraying pipe horizontally arranged in the working cavity, and an inlet of the spraying pipe penetrates through the upper cylinder body so as to be connected with external liquid inlet equipment; the spraying pipe is provided with a spraying ball, and the spraying direction of the spraying ball points to the direction of the filter disc.
Preferably, the lower cylinder body is a revolving body, and the axial section of the lower cylinder body is W-shaped; flange holes are uniformly distributed at the top cylinder opening and the middle crown of the lower cylinder body, and pull rods are correspondingly arranged at the top edge and the bottom edge of the filter disc; a lifting ring convenient for lifting the filter disc is arranged at the top end of the pull rod, and lead vertically penetrates through the lower cylinder body through the matched flange hole at the bottom end of the pull rod and is fixed by a screw cap; the switch valve is an upward-extending discharge valve, and the valve port of the switch valve is flush with the small port of the filter disc.
Preferably, the bottom surface of the lower cylinder is spherical, and a liquid discharge port communicated with the mother liquor collecting cavity is positioned at the lowest end of the W-shaped lower cylinder.
Preferably, the lower surface of the filter disc is coaxially and downwardly convexly provided with reinforcing rings, and the reinforcing rings are coaxial with each other to form a concentric ring-shaped layout; the reinforcing rings are connected with each other through radial rib plates, so that a latticed reinforcing structure is formed on the bottom surface of the filter disc; a gap for mother liquor to flow is reserved between the reinforcing structure and the bottom surface of the lower cylinder body.
Preferably, the outer cylindrical surface of the filter disc is a conical surface with a large diameter at the top and a small diameter at the bottom, and a matching counter bore with a large diameter at the top is correspondingly arranged at the top opening and forms coaxial splicing matching between the two.
Preferably, the outer wall of the lower cylinder body is coaxially and convexly provided with an outer ring body, and the bottom end of the upper cylinder body is inserted into the outer wall of the lower cylinder body from top to bottom and forms a spigot type sealing fit with the outer ring body; the outer wall of the upper cylinder is fixedly connected with a rack, and two ends of the vertical piston cylinder are respectively hinged with the outer ring body and the rack, so that the lower cylinder and the filter disc are pushed to generate vertical approaching and separating actions relative to the lead of the upper cylinder.
Preferably, a jacket and/or a coil pipe are arranged at the outer wall of the lower barrel body, and the arrangement position of the jacket and/or the coil pipe and the arrangement position of the outer ring body are in space avoidance with each other.
The invention has the beneficial effects that:
1) according to the scheme, on one hand, the filter disc and the lower cylinder body form a detachable structure, so that the filter disc and the lower cylinder body are matched to form the mother liquor collecting cavity in working, the filter disc can be detached at any time during cleaning, all mother liquor contact parts are completely exposed, thorough cleaning is achieved, and potential safety hazard conditions such as flowing short circuit and the like caused by crystal precipitation and accumulation are avoided. On the other hand, for the problem of solid slurry accumulation of the conventional filter disc, the invention not only ensures the convergence effect of the solid slurry to the middle part through the cone-hopper-shaped filter disc structure; meanwhile, the discharge port arranged in the middle part also realizes the timely discharge function of the solid slurry, thereby avoiding the potential hazards of explosion and the like possibly caused by excessive collection of the solid slurry. The arrangement of the stirring component and the spraying component provides the functions of stirring materials and online spraying and washing so as to realize the filtering and washing purposes.
Therefore, potential safety hazards such as deposition risk of coarse crystal particles of filter cakes are avoided, and equipment safety is improved; the invention can effectively avoid the problem of deposition of filter cake particles while realizing the function of filtering and washing the energetic material, and has the advantage of safe and reliable work.
2) For the stirring component, the first safety is high, so that a conventional exposed bolt fastening mode needing to be screwed cannot be adopted; in view of this, the invention adopts an integral welding mode to form the stirring paddle and the stirring shaft, thereby ensuring the safety of the energetic material during filtering and washing. In addition, in the axial direction of the stirring shaft, the distance between the stirring paddle and the filter disc is equal to 50mm, because when the energetic materials are accumulated and crystallized at the filter disc, the stirring paddle higher than 50mm can avoid the condition of collision and even detonation of the possibly crystallized crystals, and the excessively high stirring paddle can influence the maximum stirring efficiency. Therefore, the selection of 50mm in the invention can ensure the stirring effect with maximum efficiency, and can not generate collision or even detonation conditions on crystals which can be crystallized, thereby seeking a balance point between practicality and safety and having remarkable effect.
3) The W-shaped lower cylinder can realize the quick drainage effect of the mother liquor, avoid the long-time stay of the mother liquor in the mother liquor collecting cavity and reduce the possibility of crystal precipitation and accumulation as much as possible. More noteworthy, the cooperation of the filter disc and the lower cylinder body is realized by the flange structures at the inner ring and the outer ring, on one hand, the cooperation positions of the flanges are independent and far away from the mother liquor collecting cavity and the working cavity above the filter disc, compared with the conventional threaded fastener exposed in the working cavity or the mother liquor collecting cavity, the safety is higher, and the conditions of energetic material explosion and the like possibly caused by actions such as threaded fastening and the like are further avoided. On the other hand, the switch valve also adopts a specific upward-expanding discharge valve so as to reduce the influence on explosive solid slurry and even crystallization as much as possible, and the use safety can be obviously improved.
4) The setting of additional strengthening has not only guaranteed the working strength of filter disc self, and this additional strengthening still has the clearance that can supply the mother liquor to flow with the section of thick bamboo bottom surface of lower barrel simultaneously to guarantee that the mother liquor collects the quick flow function of intracavity mother liquor, kill many birds with one stone.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is a schematic cross-sectional structural view of a filter disc;
FIG. 3 is a schematic sectional view of the structure of the lower cylinder;
FIG. 4 is a schematic structural view of the on-off valve;
FIG. 5 is a schematic view of the arrangement of the reinforcing structure;
FIG. 6 is a schematic view of the arrangement of the fixing structure;
FIG. 7 is a longitudinal section velocity vector diagram when the distance from the stirring paddle to the filter disc is 50 mm;
FIG. 8 is a longitudinal section turbulence energy diagram at a paddle-to-filter disc distance of 50 mm.
The actual correspondence between each label and the part name of the invention is as follows:
10-filter disc 11-discharge port 12-switch valve
13-pull rod 14-lifting ring 15-nut 16-reinforcing ring 17-radial rib plate
20-lower cylinder 20 a-top cylinder mouth 20 b-middle crown
21-liquid discharge port 22-outer ring body 23-transverse rib plate 24-longitudinal rib plate
30-upper cylinder 40-stirring assembly
41-stirring motor 42-stirring shaft 43-stirring paddle
50-spray assembly 51-spray pipe 52-spray ball
60-frame 70-plumb piston cylinder 80-jacket 90-coil pipe
Detailed Description
For ease of understanding, the specific construction and operation of the invention is described further herein as follows:
the specific implementation structure of the present invention can be seen in fig. 1-6, which includes a cylinder portion, a stirring assembly 40, a spraying assembly 50, a frame 60, etc. Wherein:
the barrel body part is a pressure-bearing container, and the design pressure, the design temperature, the equipment material and the like meet the specific requirements of the energetic material process. The upper cylinder 30 and the lower cylinder 20 form a closed pressure-bearing container through the seam allowance, which is a material working space, namely a filtering washing cavity. Concentrated nitric acid, water or organic solvents such as acetone, ethyl acetate and the like and energetic materials are stirred, mixed, washed and filtered in the material working space. The upper cylinder 30 generally comprises a cylinder straight section, a jacket 80 and/or a coil 90, a seal head, a flange and the like, wherein the seal head is generally provided with a material inlet, a cleaning solution inlet, a pressure gauge port, a safety valve port, an air inlet, an air outlet and the like, which are not described one by one.
During operation, the outer ring 22 of the lower cylinder 20 is pushed by the vertical piston cylinder 70, so that the lower cylinder 20 and the filter disc 10 move downward relative to the upper cylinder 30, and the whole base can be exposed.
The stirring component 40 is erected on the sealing head of the upper cylinder 30, and the output shaft of the stirring component is coaxial with the upper cylinder 30. The stirring assembly 40 generally comprises a stirring motor 41 and a speed reducer, so as to output a rotating speed and a torque within a certain range, and meet the requirements of stirring, mixing and scraping in the slag discharging process in the washing and filtering process. The stirring shaft 42 is also arranged coaxially with the upper cylinder 30 and penetrates out of the upper cylinder 30 through the seal head, and the stirring shaft 42 synchronously receives the rotating speed and the torque output by the stirring motor 41. The bottom end of the stirring shaft 42 is provided with a stirring paddle 43, and the distance between the bottommost surface of the stirring paddle 43 and the upper surface of the circular truncated cone-shaped filter disc 10 is a certain distance, generally more than 50mm, so that hard friction and extrusion between the stirring paddle 43 and a filter cake are avoided.
Referring to fig. 1, a spray assembly 50, specifically including a spray pipe 51 and a spray ball 52 for washing, disposed at the spray pipe 51, is further disposed at the upper cylinder 30. The number and size of the spray balls 52 are rotated according to the diameter and height of the upper cylinder 30. The spraying ball 52 is not suitable for being made of metal, so that potential safety hazards caused by metal friction are avoided; polytetrafluoroethylene or nozzle types may be used. When the filter disc works, the upper surface of the filter disc 10 and the inner surface of the upper cylinder 30 form a closed cavity which is a section for stirring, mixing, washing and filtering materials and is a working cavity. And designing the effective volume and the slag containing area of the working cavity according to the technological parameters of solid content, liquid content and the like of the energetic material.
Further, as shown in fig. 1-2, the shape of the filter disc 10 is a truncated cone shape, i.e. a funnel shape or a bell mouth shape, the center is the lowest point, and is the discharge port 11 of the solid slurry; the design avoids the potential safety hazard that slurry solids are easy to accumulate due to the minimum central stirring linear velocity of the existing equipment. The filter disc 10 is integral, can be integrally lifted by a lifting ring, and completely exposes all mother liquor contact parts, so that thorough cleaning is realized.
The specific structure of the filter disc 10 is as follows: according to the material process requirements, a plurality of layers of metal sintering nets made of appropriate metal materials and appropriate filtering precision are selected to be manufactured into a circular truncated cone shape, the large end of each metal sintering net is welded with an outer ring flange, and the small end of each metal sintering net is welded with an outer ring flange. For the convenience of hoisting, the outer cylindrical surface of the outer ring flange is provided with a taper which is big-end-up and small-end-down. Meanwhile, the upper surface of the outer ring flange is provided with three lifting rings 14; the lower surfaces of the outer ring flange and the inner ring flange are fixedly provided with pull rods 13 so as to be fixedly connected with matched screw caps 15; flange holes are correspondingly arranged at the top nozzle 20a and the middle crown 20b of the lower cylinder 20 so as to correspond one-to-one with the matched pull rods 13. The pull rod 13 and the nut 15 are completely independent, i.e. do not contact the material, so that the screw thread does not press the material to cause safety accidents, and therefore possible safety risks are avoided. During actual assembly, the corresponding part matching position needs to be provided with a seal. In order to ensure the strength, a reinforcing ring can be arranged at the flange of the inner ring according to the pressure requirement.
The lower cylinder 20 cooperates with the filter disc 10 to form a mother liquor collection chamber. Under the action of pressure, the mother liquor in the material permeates through the multi-layer metal sintering net of the filter disc 10 and is collected into the mother liquor collecting cavity. Because of the mother liquor collection cavity volume is great, the great slope that barrel 20 self "W" form design produced under the cooperation, consequently the mother liquor is difficult for the stagnation, and mother liquor mobility is better, has solved the poor crystal of causing of mother liquor mobility that flat bed formula structure leads to and has precipitated the difficult problem. And when the filter disc 10 is integrally lifted, the mother liquor collecting cavity is completely exposed, manual regular intervention can be performed, the mother liquor collecting cavity is thoroughly cleaned, and flowing short circuit caused by crystal precipitation and accumulation is avoided.
In order to solve the problem of the supporting strength of the metal sintering net, as shown in fig. 5-6, a series of spoke rib plates can be arranged in the mother liquor collecting cavity, and the number, the wall thickness and the like of the spoke rib plates are related to the diameter, the pressure and the like of the lower cylinder body 20. Specifically, referring to fig. 5, a reinforcing ring 16 and a radial rib plate 17 are arranged on the bottom surface of the filter disc 10, so as to form a reinforcing structure; meanwhile, the reinforcing structure is not in contact with the inner bottom surface of the lower barrel 20 and has a certain distance, which is a mother liquor flowing channel. Through the design, the reinforcing structure presents the square grid shape of a certain size, the metal sintering net is well supported, and the metal sintering net is prevented from being deformed greatly and being damaged by pressure under the action of pressure. In fig. 6, a transverse rib 23 and a longitudinal rib 24 are arranged on the outer bottom surface of the lower cylinder 20, so as to form a well-lattice type fixing structure, so as to further reinforce the lower cylinder 20.
Further, in order to ensure the smooth flowing of the mother liquor, the lowest position of the mother liquor collecting cavity is provided with a series of mother liquor outlets, namely a liquor drainage port 21, and the number, the diameter and the like of the mother liquor outlet are related to the diameter, the material characteristics and the like of the lower barrel body 20.
In actual assembly, the on-off valve 12 shown in fig. 3 needs to be installed at the inner ring flange of the filter disc 10 and abutted with the discharge port 11 for discharging the solid slurry. The switch valve 12 is generally an upward-extending discharge valve, and in order to prevent hard friction to energetic materials, a valve core of the switch valve 12 needs to be sprayed with a plastic material, such as F40 or F30; the plastic guide sleeve is needed to be added at the joint of the valve rod and the valve body, the plastic guide sleeve is generally made of polytetrafluoroethylene, and the situation that materials are brought into the valve body by the valve rod and safety accidents are caused by extrusion is avoided.
In fig. 7-8, a longitudinal section velocity vector diagram and a longitudinal section turbulence energy diagram are disclosed for a distance of 50mm from the paddle 43 to the disc 10. In actual operation, the following results are found: the height of the stirring paddle 43 is increased, the change of the fluid flowing state in the cylinder body part is not large, and the fluid at the bottom of the paddle flows, but the effect is not obvious; when the distance from the stirring paddle 43 to the filter disc 10 is increased, the low-turbulence kinetic energy area at the center of the bottom of the paddle is obviously enlarged; this shows that, the increase of the height of the stirring paddle can cause a certain adverse effect on the stirring effect of the materials at the bottom of the tank; the study finds that the optimal distance is 50mm when the device is used specifically.
It will, of course, be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (10)
1. The utility model provides a dual-purpose machine of intrinsic safety type energetic material filtration washing which characterized in that: comprises a lower cylinder (20) and an upper cylinder (30) which is detachably matched with the lower cylinder (20), wherein the upper cylinder (30) and the lower cylinder (20) are enclosed together to form a filtering and washing cavity; a filter disc (10) is arranged at the lower cylinder body (20), so that a filtering and washing cavity is divided into a working cavity positioned at the upper part of the filter disc (10) and a mother liquid collecting cavity positioned at the lower part of the filter disc (10), and a liquid discharge port (21) is correspondingly arranged at the lower cylinder body (20) so as to be communicated with the mother liquid collecting cavity; the filter disc (10) is in a bell mouth shape with a big-end-up caliber, a small port positioned at the axis of the filter disc (10) forms a discharge port (11) for discharging solid slurry, the discharge port (11) is communicated with external material collecting equipment, and a switch valve (12) capable of opening and closing the discharge port (11) is arranged on the discharge port (11); the dual-purpose machine also comprises a stirring component (40) with a stirring function and a spraying component (50) for spraying the cleaning solution into the working cavity.
2. The intrinsically safe energetic material filtering and washing machine as claimed in claim 1, wherein: stirring subassembly (40) is including installing agitator motor (41) of last barrel (30) top department, and agitator shaft (42) of agitator motor (41) are coaxial to run through again and stretch into the working chamber behind barrel (30) roof, and lie in radial concave cooperation groove that is equipped with of (mixing) shaft (42) shaft body department in the working chamber, and weld after the cooperation groove is radially inserted to stirring rake (43) to make stirring rake (43) and (mixing) shaft (42) form integrative welding structure.
3. The intrinsically safe energetic material filtering and washing machine as claimed in claim 2, wherein: in the axial direction of the stirring shaft (42), the distance between the stirring paddle (43) and the filter disc (10) is equal to 50 mm.
4. The intrinsically safe energetic material filtering and washing machine as claimed in claim 1, wherein: the spraying assembly (50) comprises a spraying pipe (51) horizontally arranged in the working cavity, and the inlet of the spraying pipe (51) penetrates through the upper cylinder body (30) so as to be connected with external liquid inlet equipment; spray balls (52) are arranged on the spray pipes (51), and the spray direction of the spray balls (52) points to the direction of the filter disc (10).
5. The machine of claim 1, 2, 3 or 4, wherein the machine comprises: the lower cylinder (20) is a revolving body, and the axial section of the lower cylinder is W-shaped; flange holes are uniformly distributed at the top barrel mouth (20a) and the middle crown (20b) of the lower barrel (20), and pull rods (13) are correspondingly arranged at the top edge and the bottom edge of the filter disc (10); a lifting ring (14) convenient for lifting the filter disc (10) is arranged at the top end of the pull rod (13), and lead vertically penetrates through the lower cylinder body (20) through a matched flange hole at the bottom end of the pull rod (13) and is fixed by a screw cap (15); the switch valve (12) is an upward-spreading type discharge valve, and the valve port of the switch valve (12) is flush with the small port of the filter disc (10).
6. The intrinsically safe energetic material filtering and washing machine as claimed in claim 5, wherein: the bottom surface of the lower cylinder body (20) is spherical, and a liquid discharge port (21) communicated with the mother liquid collecting cavity is positioned at the lowest end of the W-shaped lower cylinder body (20).
7. The intrinsically safe energetic material filtering and washing machine as claimed in claim 5, wherein: the lower surface of the filter disc (10) is coaxially and downwards convexly provided with reinforcing rings (16), and the reinforcing rings (16) are coaxial with each other to form a concentric annular layout; the reinforcing rings (16) are connected with each other through radial rib plates (17), so that a grid-shaped reinforcing structure is formed on the bottom surface of the filter disc (10); a gap for mother liquor to flow is reserved between the reinforcing structure and the bottom surface of the lower cylinder body (20).
8. The intrinsically safe energetic material filtering and washing machine as claimed in claim 5, wherein: the outer cylindrical surface of the filter disc (10) is a conical surface with a large diameter at the top and a small diameter at the bottom, and matching counter bores with a large diameter at the top and a small diameter at the bottom are correspondingly arranged at the top cylinder opening (20a) and form coaxial splicing matching between the two.
9. The intrinsically safe energetic material filtering and washing machine as claimed in claim 5, wherein: the outer ring body (22) is coaxially and convexly arranged on the outer wall of the lower barrel body (20), and the bottom end of the upper barrel body (30) is inserted into the outer wall of the lower barrel body (20) from top to bottom and forms a spigot type sealing fit with the outer ring body (22); the outer wall of the upper cylinder (30) is fixedly connected with a rack (60), and two ends of the vertical piston cylinder (70) are respectively hinged with the outer ring body (22) and the rack (60), so that the lower cylinder (20) and the filter disc (10) are pushed to generate vertical approaching and separating actions relative to the lead of the upper cylinder (30).
10. The intrinsically safe energetic material filtering and washing machine as claimed in claim 9, wherein: the outer wall of the lower cylinder (20) is provided with a jacket (80) and/or a coil (90), and the arrangement position of the jacket (80) and/or the coil (90) and the arrangement position of the outer ring body (22) are in space avoidance with each other.
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