CN117326735A - Sodium sulfate solution recovery device and process - Google Patents
Sodium sulfate solution recovery device and process Download PDFInfo
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- CN117326735A CN117326735A CN202311310895.4A CN202311310895A CN117326735A CN 117326735 A CN117326735 A CN 117326735A CN 202311310895 A CN202311310895 A CN 202311310895A CN 117326735 A CN117326735 A CN 117326735A
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- sodium sulfate
- liquid
- cylinder
- discharge
- centrifugal mechanism
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- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 title claims abstract description 195
- 229910052938 sodium sulfate Inorganic materials 0.000 title claims abstract description 133
- 235000011152 sodium sulphate Nutrition 0.000 title claims abstract description 133
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title description 10
- 239000007788 liquid Substances 0.000 claims abstract description 159
- 238000007599 discharging Methods 0.000 claims abstract description 74
- 238000002425 crystallisation Methods 0.000 claims abstract description 68
- 230000008025 crystallization Effects 0.000 claims abstract description 66
- 230000008014 freezing Effects 0.000 claims abstract description 52
- 238000007710 freezing Methods 0.000 claims abstract description 52
- 239000013078 crystal Substances 0.000 claims description 96
- 239000002351 wastewater Substances 0.000 claims description 93
- 239000010446 mirabilite Substances 0.000 claims description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 52
- 238000002844 melting Methods 0.000 claims description 48
- 230000008018 melting Effects 0.000 claims description 48
- 238000000926 separation method Methods 0.000 claims description 41
- 238000001704 evaporation Methods 0.000 claims description 39
- 230000008020 evaporation Effects 0.000 claims description 33
- 230000002457 bidirectional effect Effects 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- 238000007790 scraping Methods 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims 4
- 241001330002 Bambuseae Species 0.000 claims 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 4
- 239000011425 bamboo Substances 0.000 claims 4
- 239000000155 melt Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/22—Treatment of water, waste water, or sewage by freezing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The invention relates to the technical field of sodium sulfate solution recovery, and provides a sodium sulfate solution recovery device and a sodium sulfate solution recovery process, wherein the sodium sulfate solution recovery device comprises a fixed support, multi-stage freezing crystallization equipment, the multi-stage freezing crystallization equipment is arranged on the fixed support, the top of the multi-stage freezing crystallization equipment is communicated with a liquid inlet pipe, the bottom of the multi-stage freezing crystallization equipment is communicated with a liquid discharging component I, a centrifugal mechanism I and a centrifugal mechanism II, both the centrifugal mechanism I and the centrifugal mechanism II are arranged on the fixed support, a discharging component with a lifting function is arranged on the fixed support, the tops of the centrifugal mechanism I and the centrifugal mechanism II are both provided with a discharging component, the liquid discharging component is arranged on the centrifugal mechanism I and the centrifugal mechanism II, and the liquid discharging component arranged on the centrifugal mechanism I is communicated with the liquid inlet pipe. Through the technical scheme, the problem that the sodium sulfate solution is inconvenient to separate and then is directly recycled in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of sodium sulfate solution recovery, in particular to a sodium sulfate solution recovery device and a sodium sulfate solution recovery process.
Background
In the salt chemical production process, a large amount of industrial wastewater is generated, and the industrial wastewater contains high-concentration sodium sulfate, so that the wastewater is also called sodium sulfate solution, and if the sodium sulfate solution wastewater is directly discharged, firstly, because the high-concentration sodium sulfate component in the wastewater can cause certain pollution to the environment, the sodium sulfate component in the wastewater also has certain recovery value, the wastewater produced in the salt chemical industry needs to be separated, and the sodium sulfate component contained in the wastewater is separated and recovered, so that the sodium sulfate solution wastewater is conveniently discharged.
The existing methods for separating sodium sulfate solution comprise a membrane filtration method, a precipitation filtration method and an evaporation crystallization method, and because the membrane filtration method and the precipitation filtration method have a relatively low treatment speed for the sodium sulfate solution, in real life, when a large amount of sodium sulfate solution is separated, the sodium sulfate solution is mostly treated by adopting an evaporation crystallization method, and the sodium sulfate solution is heated in the working principle of evaporation crystallization, a hot solvent is added into the sodium sulfate solution to saturate the sodium sulfate solution, so that sodium sulfate components in the solution are coagulated into crystals to be separated out, a user can conveniently separate the sodium sulfate components, but the sodium sulfate solution is doped with some other solid substances, a large amount of solid impurities are doped in the sodium sulfate crystals separated by the evaporation crystallization operation, the direct recycling of the sodium sulfate crystals is inconvenient for the user, and the subsequent continuous treatment of the sodium sulfate is required for the user, so that the sodium sulfate can be used, and the recycling efficiency of the sodium sulfate solution is affected for the user.
Disclosure of Invention
The invention provides a sodium sulfate solution recovery device and a process, which solve the problem that the sodium sulfate solution is inconvenient to directly recover and use after being separated in the related technology.
The technical scheme of the invention is as follows: a sodium sulfate solution recovery device comprising:
a fixed support;
the multistage freezing and crystallizing device is arranged on the fixed support, the top of the multistage freezing and crystallizing device is communicated with a liquid inlet pipe, and the bottom of the multistage freezing and crystallizing device is communicated with a liquid discharging component I;
the centrifugal mechanism I and the centrifugal mechanism II are both arranged on the fixed support, the centrifugal mechanism I and the centrifugal mechanism II have the same structure, the centrifugal mechanism I and the centrifugal mechanism II comprise fixed cylinders, centrifugal cylinders and stabilizing blocks, the fixed cylinders are arranged on the fixed support, the centrifugal cylinders are rotatably arranged in the fixed cylinders through rotating seats, a rotation driving part is arranged between the rotating seats and the fixed cylinders, a plurality of stabilizing blocks are arranged in the fixed cylinders, and the centrifugal cylinders are rotatably arranged among the stabilizing blocks;
The centrifugal mechanism I and the centrifugal mechanism II are both provided with at the top thereof with a discharging assembly, the discharging assembly comprises a spiral discharging cylinder, a lifting frame, a sliding frame and a lifting ring, a discharging pipe is communicated with the spiral discharging cylinder and is close to the centrifugal mechanism I, the discharging pipe is communicated with the melting cylinder, the lifting frame is arranged at the top of the fixed cylinder, a lifting screw is arranged in the lifting frame in a rotating manner, a first motor is arranged on the lifting frame, the output end of the first motor is fixedly connected with the lifting screw, the sliding frame is arranged on the fixed cylinder, the lifting ring is slidably connected between the lifting frame and the sliding frame, the spiral discharging cylinder is fixedly connected with the lifting ring through a fixed plate, and the lifting ring is in threaded connection with the lifting screw.
The liquid discharge assembly is arranged on the first centrifugal mechanism and the second centrifugal mechanism, the liquid discharge assembly arranged on the first centrifugal mechanism is communicated with the liquid inlet pipe, the liquid discharge assembly comprises a discharge water tank, a liquid suction pipe, a liquid discharge water pump and a discharge cylinder, the two fixed cylinders are respectively provided with the discharge water tank, the liquid suction pipe is arranged on the fixed plate, the liquid suction pipe and the fixed cylinders are connected in a penetrating way, the liquid suction pipe is communicated with the discharge water tank, the liquid discharge water pump is arranged on the discharge water tank, the input end of the liquid discharge water pump is communicated with the discharge water tank, the discharge cylinder is provided with a control valve, the output end of the liquid discharge water pump is communicated with the discharge cylinder, and the discharge cylinder is communicated with the liquid inlet pipe or the liquid supply pipe.
The multistage evaporation crystallization device is arranged on the fixed support, the top of the multistage evaporation crystallization device is communicated with a liquid supply pipe, the bottom of the multistage evaporation crystallization device is communicated with a liquid discharge component II, and the liquid discharge component arranged on the centrifugal mechanism II is communicated with the liquid supply pipe;
the device comprises a fixed support, a melt return cylinder, a mixing discharge assembly, a liquid supply pump and a centrifugal mechanism, wherein the melt return cylinder is arranged on the fixed support, the melt return cylinder is provided with the mixing discharge assembly, the mixing discharge assembly comprises a rotating shaft, a plurality of stirring rods, a plurality of scraping plates and the liquid supply pump, the rotating shaft is rotationally arranged in the melt return cylinder, the melt return cylinder is provided with a second motor, the output end of the second motor is fixedly connected with the rotating shaft, the rotating shaft is provided with a plurality of stirring rods and a plurality of scraping plates, the liquid supply pump is arranged on the melt return cylinder, the input end of the liquid supply pump is communicated with the melt return cylinder, and the output end of the liquid supply pump is communicated with the fixed cylinder which is arranged in the centrifugal mechanism II;
the separation box body is arranged on the melting return cylinder, a crystal discharge cavity and a liquid discharge cavity are formed in the separation box body through a partition plate, the liquid discharge assembly I is communicated with the liquid discharge cavity, and the crystal discharge cavity is communicated with the melting return cylinder;
And the separation assembly is arranged in the separation box body.
The sodium sulfate solution recovery process comprises the sodium sulfate solution recovery device and further comprises the following steps:
s1, freezing and crystallizing, namely filling sodium sulfate solution wastewater to be subjected to freezing and crystallizing into multi-stage freezing and crystallizing equipment through a liquid inlet pipe, condensing sodium sulfate components and moisture in the sodium sulfate solution wastewater into mirabilite through the multi-stage freezing and crystallizing equipment, and finally discharging the wastewater containing the mirabilite into a separation box through a liquid discharge assembly I arranged on the multi-stage freezing and crystallizing equipment;
s2, primary separation, after the solution is discharged into the liquid discharge cavity, the solution is firstly contacted with a filter sieve plate arranged on the mounting frame, the doped mirabilite crystals in the solution are separated through the filter sieve plate, the separated wastewater continuously enters into a first centrifugal mechanism, when a large amount of mirabilite crystals are remained on one filter sieve plate to influence the filtering efficiency, a fourth motor is started to drive a rotating shaft to rotate, a plurality of mounting frames and the filter sieve plate are made to rotate, the separated mirabilite crystals are moved into the crystal discharge cavity, when the rotating shaft rotates, a bidirectional screw is driven to rotate through a linkage assembly, two thread sections with opposite threads are arranged on the bidirectional screw, a thread sleeve in threaded connection with the thread sections is driven to move in a rotating cylinder, and the mirabilite crystals in the crystal discharge cavity are pushed into a melting cylinder by a scraper;
S3, secondary separation, namely discharging the wastewater containing mirabilite crystals into a centrifugal barrel included in a first centrifugal mechanism, rotating the centrifugal barrel in a fixed barrel under the drive of a rotation driving part, so as to separate the mirabilite crystals in the wastewater from the wastewater, starting a first motor on a lifting frame arranged on the first centrifugal mechanism, driving a transmission screw to rotate, enabling a lifting ring to drive a spiral discharging barrel to descend between the lifting frame and a sliding frame, entering the centrifugal barrel, driving a fixed plate and a liquid suction pipe to move into the centrifugal barrel together by the lifting ring, discharging liquid in the centrifugal barrel into a discharge water tank through the liquid suction pipe by starting a liquid discharge water pump, finally discharging the wastewater into the discharge barrel through the liquid discharge water pump, opening a control valve on the discharge barrel to directly discharge the wastewater or continuously conveying the wastewater into a multi-stage freezing crystallization device, and discharging the mirabilite crystals into a melting return barrel through the spiral discharging barrel and the liquid discharge pipe after the wastewater is discharged;
s4, back melting, namely after the separated mirabilite crystals and the wastewater containing sodium sulfate crystals after being heated by the multistage evaporation crystallization equipment are filled into a back melting cylinder, starting a second motor to drive a rotating shaft to rotate, fully contacting sodium sulfate solution with the mirabilite crystals through a plurality of stirring rods and scraping plates, and after the mirabilite is dissolved into the sodium sulfate solution, starting a liquid supply pump to convey the dissolved sodium sulfate solution into a second centrifugal mechanism;
S5, thoroughly separating, namely discharging sodium sulfate solution wastewater into a centrifugal mechanism II, discharging sodium sulfate crystals through a discharging component on the centrifugal mechanism II after separating the sodium sulfate crystals, directly recycling the separated sodium sulfate crystals, discharging the separated wastewater into a multistage evaporation crystallization device through a liquid discharging component on the centrifugal mechanism II again, and continuing to perform evaporation crystallization operation on the residual sodium sulfate crystals in the wastewater.
In order to drain the solution processed in the multi-stage freezing crystallization equipment and the multi-stage evaporating crystallization equipment to the appointed position, further, the first liquid draining component and the second liquid draining component have the same structure, the first liquid draining component and the second liquid draining component respectively comprise a water draining pump and a draining pipe, the multi-stage freezing crystallization equipment and the multi-stage evaporating crystallization equipment are respectively provided with the water draining pump, the input ends of the two water draining pumps are respectively communicated with the multi-stage freezing crystallization equipment and the multi-stage evaporating crystallization equipment, the output ends of the two water draining pumps are respectively communicated with the draining pipe, and the two draining pipes are respectively communicated with the melting back cylinder and the liquid draining cavity.
In order to separate the solution after freezing crystallization, the first separation efficiency of centrifugal mechanism is accelerated, further, separation subassembly includes pivot, mounting frame and a rotary drum, the pivot rotates and sets up on the baffle, be provided with the fourth motor on the separation box, the output of fourth motor with pivot fixed connection, be provided with a plurality of in the pivot mounting frame, be provided with the filter screen board on the mounting frame, a rotary drum sets up in the crystal discharge chamber, rotary drum internal rotation is provided with the bi-directional screw rod, threaded connection has the thread bush on the bi-directional screw rod, be provided with the scraper blade on the thread bush, bi-directional screw rod with be provided with the interlock subassembly between the pivot.
In order to control the driving relation of the rotating shaft to the bidirectional screw, on the basis of the scheme, the linkage assembly comprises a meshing sleeve and a driving wheel, the meshing sleeve is slidably arranged on the rotating shaft, a meshing block is arranged on the meshing sleeve, the driving wheel is slidably arranged on the meshing sleeve, the driving wheel is rotatably arranged on the separation box body, the driving wheel is also arranged on the bidirectional screw, and a driving belt is arranged between the two driving wheels.
In order to drive the centrifugal cylinder to rotate in the fixed cylinder, the rotary driving part further comprises two driving wheels on the basis of the scheme, wherein one driving wheel is arranged on the rotary seat, a third motor is arranged on the fixed cylinder, the other driving wheel is arranged on the third motor, and a driving belt is arranged between the two driving wheels.
The working principle and the beneficial effects of the invention are as follows:
1. in the invention, when sodium sulfate solution wastewater generated in salt chemical industry is required to be separated and recovered, firstly, the wastewater is discharged into a multi-stage freezing crystallization device through a liquid inlet pipe, sodium sulfate components and partial moisture in the sodium sulfate solution wastewater are condensed into mirabilite crystals, firstly, the wastewater mixed with the mirabilite crystals is discharged into a separation box body through a liquid discharge assembly, most of mirabilite in the wastewater is directly filled into a return melting cylinder through the separation assembly, the rest of wastewater mixed with a small amount of mirabilite crystals is discharged into a centrifugal mechanism I, mirabilite in the wastewater is separated out through the centrifugal mechanism I, then, the separated mirabilite is discharged into a return melting cylinder through a liquid discharge assembly arranged on the centrifugal mechanism I, the separated wastewater is conveyed and discharged or re-discharged into the multi-stage freezing crystallization device for continuous crystallization operation, and the sodium sulfate components separated out in the wastewater can be directly recycled by separating and discharging other solid impurities in the wastewater before evaporating and crystallizing the sodium sulfate solution wastewater;
2. In the invention, after the separated mirabilite crystals are discharged into a return melting cylinder and reprocessed into a solution through a mixing and discharging assembly, the solution is then filled into a second centrifugal mechanism, sodium sulfate components in the solution are separated and discharged, in order to thoroughly separate and recycle the residual sodium sulfate components in the separated solution, the solution is discharged into a multistage evaporation crystallization device again through a liquid discharging assembly arranged on the second centrifugal mechanism, the residual sodium sulfate components in the solution are condensed again, the solution with the condensed sodium sulfate crystals is discharged into the return melting cylinder, and the dissolution speed of the mirabilite crystals filled into the return melting cylinder is accelerated, so that the sodium sulfate crystals and the mirabilite crystals doped in the solution are thoroughly separated and recycled;
3. therefore, when the sodium sulfate solution recovery device and the process can separate and recover the sodium sulfate component in the sodium sulfate solution wastewater, the solid impurities doped in the sodium sulfate solution wastewater can be separated at first, so that the sodium sulfate component recovered by subsequent separation can be directly recycled, and meanwhile, the heat energy of the multistage evaporation crystallization equipment is effectively utilized, so that the recovery of the sodium sulfate solution is more thorough and efficient.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of a structure with portions broken away in the present invention;
FIG. 2 is a schematic diagram of the overall structure of the present invention;
FIG. 3 is a schematic view of a centrifugal mechanism I, a multi-stage freezing and crystallizing device and a liquid discharging assembly I of the present invention, partially in section;
FIG. 4 is a schematic diagram of the structure of the centrifugal mechanism II, the liquid draining assembly II and the multistage evaporative crystallization device in the invention;
FIG. 5 is a schematic view in partial cross-section of the cooperation of the discharge assembly and the liquid discharge assembly of the present invention;
FIG. 6 is a schematic view of the stationary drum, the centrifugal drum, the stabilizing block and the driving wheel of the present invention in partial cross section;
FIG. 7 is a schematic view of the configuration of the combination of the return melting cylinder and the mixing and discharging assembly of the present invention;
FIG. 8 is a schematic view in partial cross-section of the mating of the separator housing and separator assembly of the present invention;
FIG. 9 is a schematic view of the cooperation of the separating assembly and the linking assembly according to the present invention;
FIG. 10 is an enlarged schematic view of the structure of FIG. 9A according to the present invention;
FIG. 11 is a schematic view of the present invention showing the structure of the separator housing and separator plate in cooperation with each other, partially in section.
Reference numerals in the drawings represent respectively: 100. a first centrifugal mechanism; 200. a centrifugal mechanism II; 300. a first liquid discharging component; 400. a liquid discharging component II; 500. a discharge assembly; 600. a liquid discharge assembly; 700. a mixing and discharging assembly; 800. a separation assembly; 900. a linkage assembly;
1. A fixed support; 2. a multi-stage freeze crystallization device; 3. a liquid inlet pipe; 4. a multi-stage evaporative crystallization device; 5. a liquid supply pipe; 6. a return melting cylinder; 7. separating the box body; 8. a partition plate; 9. a fixed cylinder; 10. a centrifugal barrel; 11. a stabilizing block; 12. a discharge water pump; 13. a discharge pipe; 14. a spiral discharging cylinder; 15. a discharge pipe; 16. a lifting frame; 17. lifting screw rods; 18. a first motor; 19. a sliding frame; 20. a lifting ring; 21. a fixing plate; 22. discharging the water tank; 23. a liquid suction pipe; 24. a liquid discharge water pump; 25. a discharge cylinder; 26. a rotating shaft; 27. a second motor; 28. a stirring rod; 29. scraping a wall plate; 30. a liquid supply pump; 31. a rotating shaft; 32. a fourth motor; 33. a mounting frame; 34. filtering the sieve plate; 35. a rotating cylinder; 36. a bidirectional screw; 37. a thread sleeve; 38. a scraper; 39. a meshing sleeve; 40. a driving wheel; 41. a transmission belt; 42. driving wheels; 43. a third motor; 44. a drive belt; 45. a screw conveying shaft; 46. and driving the motor.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 11, this embodiment proposes a sodium sulfate solution recycling apparatus, which comprises a fixed support 1, a multi-stage freezing crystallization device 2 is arranged on the fixed support 1, the top of the multi-stage freezing crystallization device 2 is communicated with a liquid inlet pipe 3, the bottom of the multi-stage freezing crystallization device 2 is communicated with a liquid discharge component 300, the liquid discharge component 300 and the liquid discharge component 400 have the same structure, the liquid discharge component 300 and the liquid discharge component 400 both comprise a discharge water pump 12 and a discharge pipe 13, the multi-stage freezing crystallization device 2 and the multi-stage evaporation crystallization device 4 are both provided with discharge water pumps 12, the input ends of the two discharge water pumps 12 are respectively communicated with the multi-stage freezing crystallization device 2 and the multi-stage evaporation crystallization device 4, the output ends of the two discharge water pumps 12 are respectively communicated with a discharge pipe 13, the two discharge pipes 13 are respectively communicated with a melting cylinder 6 and a liquid discharge cavity, the multi-stage freezing and crystallizing device 2 is a conventional device for providing a cooling effect on liquid in real life, and performs freezing and crystallizing operation on sodium sulfate solution wastewater by arranging a refrigerating unit, so that sodium sulfate components and partial moisture in the sodium sulfate solution wastewater are condensed into mirabilite crystals, in order to avoid the problem of condensation of other solid impurities in the sodium sulfate solution, the multi-stage freezing and crystallizing device 2 can freeze the sodium sulfate solution stage by stage, because the crystallization temperature of the sodium sulfate solution is lower, the sodium sulfate components in the sodium sulfate solution are quickly crystallized into mirabilite by cooling the sodium sulfate solution, the subsequent separation of mirabilite crystals is facilitated, and after the freezing and crystallizing of the sodium sulfate solution wastewater is finished, by a discharge water pump 12 communicated with the multi-stage freezing and crystallizing device 2, the wastewater mixed with the mirabilite crystals is discharged into the separation tank 7 through the discharge pipe 13.
As shown in fig. 1 to 6, the centrifugal mechanism one 100 and the centrifugal mechanism two 200 are both arranged on the fixed support 1, the centrifugal mechanism one 100 and the centrifugal mechanism two 200 have the same structure, the centrifugal mechanism one 100 and the centrifugal mechanism two 200 comprise a fixed cylinder 9, a centrifugal cylinder 10 and a stabilizing block 11, the fixed cylinder 9 is arranged on the fixed support 1, the centrifugal cylinder 10 is rotationally arranged in the fixed cylinder 9 through a rotating seat, a rotation driving part is arranged between the rotating seat and the fixed cylinder 9, a plurality of stabilizing blocks 11 are arranged in the fixed cylinder 9, the centrifugal cylinder 10 is rotationally arranged between the plurality of stabilizing blocks 11, the rotation driving part comprises two driving wheels 42, one driving wheel 42 is arranged on the rotating seat, a third motor 43 is arranged on the fixed cylinder 9, the other driving wheel 42 is arranged on the third motor 43, a driving belt 44 is arranged between the two driving wheels 42, after the wastewater is discharged into the corresponding centrifugal cylinder 10, the rotating seat and the centrifugal cylinder 10 is driven to rotate in the fixed cylinder 9 through a transmission relation between the two driving wheels 42 and the driving belt 44, because the centrifugal cylinder 10 is rotationally arranged in the centrifugal cylinder 10, and the problem that the centrifugal cylinder 10 can be prevented from being obliquely inclined in the centrifugal cylinder 10 due to the fact that the centrifugal cylinder 10 is obliquely arranged in the centrifugal cylinder 10.
As shown in fig. 1 to 6, the top of the centrifugal mechanism one 100 and the centrifugal mechanism two 200 are respectively provided with a discharging assembly 500, the discharging assembly 500 comprises a spiral discharging cylinder 14, a lifting frame 16, a sliding frame 19 and a lifting ring 20, the spiral discharging cylinder 14 is rotationally provided with a spiral conveying shaft 45, the spiral discharging cylinder 14 is provided with a driving motor 46, the output end of the driving motor 46 is fixedly connected with the spiral conveying shaft 45, the spiral discharging cylinder 14 is communicated with a discharging pipe 15, the discharging pipe 15 close to the centrifugal mechanism one 100 is communicated with a melting return cylinder 6, the top of the fixed cylinder 9 is provided with a lifting frame 16, the lifting frame 16 is rotationally provided with a lifting screw 17, the lifting frame 16 is provided with a first motor 18, the output end of the first motor 18 is fixedly connected with the lifting screw 17, the sliding frame 19 is arranged on the fixed cylinder 9, the lifting ring 20 is slidingly connected between the lifting frame 16 and the sliding frame 19, the spiral discharging cylinder 14 is fixedly connected with the lifting ring 20 through the fixed plate 21, the lifting ring 20 is in threaded connection with the lifting screw 17, after the first centrifugal mechanism 100 and the second centrifugal mechanism 200 separate crystals in wastewater, when the separated crystals are required to be discharged, the first motor 18 is started to drive the lifting screw 17 to rotate, the lifting ring 20 is enabled to descend between the lifting frame 16 and the sliding frame 19, the spiral discharging cylinder 14 is driven to enter the fixed cylinder 9, the bottom of the spiral discharging cylinder 14 enters the centrifugal cylinder 10, after the liquid discharging assembly 600 finishes pumping and discharging the wastewater floating on the upper side, the driving motor 46 is started to drive the spiral conveying shaft 45 to rotate, the separated crystals are enabled to move in the spiral discharging cylinder 14 and finally discharged through the discharging pipe 15, and the discharging pipe 15 of the spiral discharging cylinder 14 arranged on the first centrifugal mechanism 100 is communicated with the melting return cylinder 6, the discharge pipe 15 of the spiral discharge cylinder 14 arranged on the centrifugal mechanism two 200 is used for discharging thoroughly separated sodium sulfate crystals.
As shown in fig. 1 to 5, the centrifugal mechanism one 100 and the centrifugal mechanism two 200 are respectively provided with a liquid discharge assembly 600, the liquid discharge assembly 600 arranged on the centrifugal mechanism one 100 is communicated with the liquid inlet pipe 3, the liquid discharge assembly 600 comprises a discharge water tank 22, a liquid suction pipe 23, a liquid discharge water pump 24 and a discharge cylinder 25, the two fixed cylinders 9 are respectively provided with the discharge water tank 22, the liquid suction pipe 23 is arranged on the fixed plate 21, the liquid suction pipe 23 and the fixed cylinders 9 are connected in a penetrating way, the liquid suction pipe 23 is communicated with the discharge water tank 22, the liquid discharge water pump 24 is arranged on the discharge water tank 22, the input end of the liquid discharge water pump 24 is communicated with the discharge water tank 22, the discharge cylinder 25 is provided with a control valve, the output end of the liquid discharge water pump 24 is communicated with the discharge cylinder 25, the discharge cylinder 25 is communicated with the liquid inlet pipe 3 or the liquid supply pipe 5, the centrifugal mechanism one 100 and the centrifugal mechanism two 200 are used for separating waste water containing crystals, along with the descending of the lifting ring 20, the fixing plate 21 and the liquid suction pipe 23 are descended together, the liquid suction pipe 23 enters the centrifugal barrel 10, the liquid discharge water pump 24 is started, the liquid in the centrifugal barrel 10 is discharged into the discharge water tank 22 through the liquid suction pipe 23, finally, the waste water is discharged into the discharge barrel 25 through the liquid discharge water pump 24, the control valve on the discharge barrel 25 can be selectively opened to directly discharge the waste water, in order to thoroughly separate and recycle sodium sulfate components in the waste water, the discharge barrel 25 for extracting the waste water in the centrifugal mechanism I100 can continuously convey the waste water into the multi-stage freezing crystallization equipment 2, freezing crystallization operation is continuously carried out, the waste water is screened for a plurality of times, the discharge barrel 25 for extracting the waste water in the centrifugal mechanism II 200 can discharge the waste water into the multi-stage evaporation crystallization equipment 4, and the residual sodium sulfate components in the waste water are crystallized, so that after the wastewater is discharged into the melting cylinder 6, mirabilite crystals are changed into solution again, the separation operation is continued, and the sodium sulfate component in the wastewater is thoroughly separated and recovered.
As shown in fig. 1 to 6, the multistage evaporation crystallization device 4 is arranged on the fixed support 1, the top of the multistage evaporation crystallization device 4 is communicated with the liquid supply pipe 5, the bottom of the multistage evaporation crystallization device 4 is communicated with the liquid discharge component two 400, the liquid discharge component 600 arranged on the centrifugal mechanism two 200 is communicated with the liquid supply pipe 5, the multistage evaporation crystallization device 4 is common MVR evaporation crystallization device for treating sodium sulfate solution wastewater in real life, and the sodium sulfate substance in the sodium sulfate solution wastewater is saturated and crystallized by heating the sodium sulfate solution wastewater filled with a hot solvent, so that sodium sulfate crystals can be conveniently separated from the wastewater in the follow-up process, the speed of crystallizing sodium sulfate solution with overhigh sodium sulfate component content is slower by the multistage evaporation crystallization device 4, and the sodium sulfate component content in the wastewater is lower by the liquid discharge component two 200 after the centrifugal mechanism two 200 is separated by the multistage evaporation crystallization device 4.
As shown in fig. 1 to 4 and 7, the return melting drum 6 is arranged on the fixed support 1, the return melting drum 6 is provided with a mixed discharge assembly 700, the mixed discharge assembly 700 comprises a rotating shaft 26, a plurality of stirring rods 28, a plurality of scraping wall plates 29 and a liquid supply pump 30, the rotating shaft 26 is rotatably arranged in the return melting drum 6, the return melting drum 6 is provided with a second motor 27, the output end of the second motor 27 is fixedly connected with the rotating shaft 26, the rotating shaft 26 is provided with a plurality of stirring rods 28 and a plurality of scraping wall plates 29, the liquid supply pump 30 is arranged on the return melting drum 6, the input end of the liquid supply pump 30 is communicated with the return melting drum 6, the output end of the liquid supply pump 30 is communicated with a fixed drum 9 included in the centrifugal mechanism 200, after the separated mirabilite crystals and the waste water containing sodium sulfate crystals are filled into the return melting drum 6 after being heated by the multi-stage evaporation crystallization device 4, the return melting drum 6 has a certain heating function, the sodium sulfate solution can be improved to become the motor after the return melting drum 6 is filled with the sodium sulfate solution, the second motor is started, the second motor is provided with a plurality of stirring rods 28 and the sodium sulfate crystals are driven by the stirring rods 29, the sodium sulfate solution is fully contacted with the sodium sulfate solution, and the sodium sulfate solution is fully dissolved by the stirring rod 29 and the sodium sulfate solution is prevented from being dissolved by the stirring rod and the sodium sulfate solution and the stirring rod is fully contacted with the wall plate 29 after the sodium sulfate solution is dissolved by the stirring rod 29.
As shown in fig. 1 to 4 and 8 to 11, the separation tank 7 is disposed on the return melting cylinder 6, a crystal discharge cavity and a liquid discharge cavity are formed in the separation tank 7 through the partition 8, the liquid discharge assembly 300 is communicated with the liquid discharge cavity, the crystal discharge cavity is communicated with the return melting cylinder 6, the separation assembly 800 is disposed in the separation tank 7, the separation assembly 800 comprises a rotating shaft 31, a mounting frame 33 and a rotating cylinder 35, the rotating shaft 31 is rotatably disposed on the partition 8, a fourth motor 32 is disposed on the separation tank 7, an output end of the fourth motor 32 is fixedly connected with the rotating shaft 31, a plurality of mounting frames 33 are disposed on the rotating shaft 31, a filtering screen 34 is disposed on the mounting frame 33, the rotating cylinder 35 is disposed in the crystal discharge cavity, a bidirectional screw 36 is rotatably disposed on the rotating cylinder 35, a thread sleeve 37 is threadedly connected with the thread sleeve 37, a scraper 38 is disposed between the bidirectional screw 36 and the rotating shaft 31, the linkage assembly 900 comprises a meshing sleeve 39 and a driving wheel 40, the meshing sleeve 39 is slidably arranged on the rotating shaft 31, a meshing block is arranged on the meshing sleeve 39, the driving wheel 40 is arranged on the meshing block in a meshing manner, the driving wheel 40 is slidably arranged on the meshing sleeve 39, the driving wheel 40 is rotatably arranged on the separation box 7, the driving wheel 40 is also arranged on the bidirectional screw 36, a driving belt 41 is arranged between the two driving wheels 40, before the solution containing mirabilite crystals frozen by the multi-stage freezing crystallization equipment 2 is discharged into the centrifugal mechanism one 100, in order to improve the efficiency of separating the mirabilite crystals by the centrifugal mechanism one 100, the solution is firstly discharged into a liquid discharge cavity of the separation box 7, and most of sodium sulfate crystals contained in the solution are separated by the separation assembly 800 arranged between the crystal discharge cavity and the liquid discharge cavity, after the solution is discharged into the liquid discharge cavity, the solution is firstly contacted with the filter sieve plate 34 arranged on the mounting frame 33, the mirabilite crystals doped in the solution are separated through the filter sieve plate 34, the separated waste water continuously enters into the first centrifugal mechanism 100, when a large amount of mirabilite crystals are remained on one filter sieve plate 34 to influence the filtering efficiency, the fourth motor 32 is started to drive the rotating shaft 31 to rotate, so that the plurality of mounting frames 33 and the filter sieve plate 34 rotate, the separated mirabilite crystals are moved into the crystal discharge cavity, because only the middle position of the crystal discharge cavity is communicated with the return melting cylinder 6, the mirabilite crystals filled into the crystal discharge cavity need to be moved, the mirabilite crystals can enter into the return melting cylinder 6, and the meshing block and the driving wheel 40 on the meshing sleeve 39 are meshed through the meshing sleeve 39 which is slidably arranged on the moving rotating shaft 31, so that when the rotating shaft 31 rotates, the two driving screw thread sections which are opposite to the threads are arranged on the two driving screw rods 36 are driven to drive the two driving screw thread sections which are connected with the driving belt 41 to drive the two driving screw sections 40 to rotate the driving wheel 40 to drive the two opposite threads of the driving screw sections to drive the two threads of the driving wheel 40 to drive the driving wheel 40 to rotate the driving wheel 40 to drive the mirabilite crystals to move into the crystal in the screw cylinder 35 into the threaded cylinder 35.
The use process of the sodium sulfate solution recovery device comprises the following steps: freezing and crystallizing, namely, filling sodium sulfate solution wastewater to be subjected to freezing and crystallizing into a multi-stage freezing and crystallizing device 2 through a liquid inlet pipe 3, condensing sodium sulfate components and moisture in the sodium sulfate solution wastewater into mirabilite through the multi-stage freezing and crystallizing device 2, and finally discharging the wastewater containing the mirabilite into a separation box 7 through a liquid discharge assembly 300 arranged on the multi-stage freezing and crystallizing device 2;
after the solution is discharged into the liquid discharge cavity, the solution is firstly contacted with a filter sieve plate 34 arranged on a mounting frame 33, the doped mirabilite crystals in the solution are separated through the filter sieve plate 34, the separated wastewater continuously enters a first centrifugal mechanism 100, when a large amount of mirabilite crystals are remained on one filter sieve plate 34 to influence the filtering efficiency, a fourth motor 32 is started to drive a rotating shaft 31 to rotate, a plurality of mounting frames 33 and the filter sieve plate 34 are made to rotate, the separated mirabilite crystals are moved into the crystal discharge cavity, when the rotating shaft 31 rotates, a linkage assembly 900 is used to drive a bidirectional screw 36 to rotate, two thread sections with opposite threads are arranged on the bidirectional screw 36, a thread sleeve 37 in threaded connection with the thread sections is driven to move in a rotating cylinder 35, and a scraper 38 is made to push the mirabilite crystals in the crystal discharge cavity into a return melting cylinder 6;
In the secondary separation, the wastewater containing mirabilite crystals is discharged into a centrifugal barrel 10 included in a first centrifugal mechanism 100, the centrifugal barrel 10 rotates in a fixed barrel 9 under the drive of a rotation driving part, so that the mirabilite crystals in the wastewater are separated from the wastewater, then a first motor 18 on a lifting frame 16 arranged on the first centrifugal mechanism 100 is started, a transmission screw is driven to rotate, a lifting ring 20 drives a spiral discharging barrel 14 to descend between the lifting frame 16 and a sliding frame 19 and enter the centrifugal barrel 10, the lifting ring 20 drives a fixed plate 21 and a liquid suction pipe 23 to move into the centrifugal barrel 10 together, liquid in the centrifugal barrel 10 is discharged into a discharge water tank 22 through the liquid suction pipe 23 by starting a liquid discharge water pump 24, finally the wastewater is discharged into a discharge barrel 25 through the liquid discharge water pump 24, the control valve on the discharge barrel 25 is opened, the wastewater is directly discharged or the wastewater is continuously conveyed into a multi-stage freezing crystallization device 2 for freezing crystallization, and after the wastewater is discharged, the mirabilite crystals are discharged into a melting barrel 6 through the spiral discharging barrel 14 and the liquid discharge pipe 15;
after the separated mirabilite crystals and the wastewater containing sodium sulfate crystals after being heated by the multi-stage evaporation crystallization equipment 4 are filled into the melting return cylinder 6, a second motor 27 is started to drive a rotating shaft 26 to rotate, sodium sulfate solution and the mirabilite crystals are fully contacted through a plurality of stirring rods 28 and a scraping plate 29, the dissolution speed of the mirabilite crystals is accelerated, the scraping plate 29 can prevent the solution from being adhered to the inner wall of the melting return cylinder 6, after the mirabilite is dissolved into the sodium sulfate solution, a liquid supply pump 30 is started, and the dissolved sodium sulfate solution is conveyed into a centrifugal mechanism II 200;
Thoroughly separates, and after discharging sodium sulfate solution wastewater into the centrifugal mechanism II 200 and separating sodium sulfate crystals, the sodium sulfate crystals are discharged through the discharging component 500 on the centrifugal mechanism II 200, so that the separated sodium sulfate crystals can be directly recycled, and the separated wastewater can be discharged into the multistage evaporation crystallization equipment 4 through the liquid discharging component 600 on the centrifugal mechanism II 200 again, so that the residual sodium sulfate crystals in the wastewater can be continuously subjected to evaporation crystallization operation.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. A sodium sulfate solution recovery device, comprising:
a fixed support (1);
the multi-stage freezing and crystallizing device (2), the multi-stage freezing and crystallizing device (2) is arranged on the fixed support (1), the top of the multi-stage freezing and crystallizing device (2) is communicated with a liquid inlet pipe (3), and the bottom of the multi-stage freezing and crystallizing device (2) is communicated with a liquid discharging component I (300);
The centrifugal mechanism I (100) and the centrifugal mechanism II (200) are arranged on the fixed support (1);
the centrifugal mechanism I (100) and the centrifugal mechanism II (200) are respectively provided with the discharging component (500) at the top;
the liquid discharge assembly (600) is arranged on the first centrifugal mechanism (100) and the second centrifugal mechanism (200), the liquid discharge assembly (600) is arranged on the first centrifugal mechanism (100), and the liquid discharge assembly (600) and the liquid inlet pipe (3) are communicated;
the multistage evaporation crystallization device (4), the multistage evaporation crystallization device (4) is arranged on the fixed support (1), a liquid supply pipe (5) is communicated with the top of the multistage evaporation crystallization device (4), a liquid discharge component II (400) is communicated with the bottom of the multistage evaporation crystallization device (4), and a liquid discharge component (600) arranged on the centrifugal mechanism II (200) is communicated with the liquid supply pipe (5);
a return melting cylinder (6), wherein the return melting cylinder (6) is arranged on the fixed support (1), and a mixed discharge assembly (700) is arranged on the return melting cylinder (6);
The separation box body (7), the separation box body (7) is arranged on the melting back cylinder (6), a crystal discharge cavity and a liquid discharge cavity are formed in the separation box body (7) through a partition plate (8), the liquid discharge component I (300) is communicated with the liquid discharge cavity, and the crystal discharge cavity is communicated with the melting back cylinder (6);
-a separation assembly (800), the separation assembly (800) being arranged within the separation housing (7).
2. The sodium sulfate solution recovery device according to claim 1, wherein the first centrifugal mechanism (100) and the second centrifugal mechanism (200) have the same structure, and the first centrifugal mechanism (100) and the second centrifugal mechanism (200) each comprise:
a fixed cylinder (9), wherein the fixed cylinder (9) is arranged on the fixed support (1);
the centrifugal cylinder (10) is rotationally arranged in the fixed cylinder (9) through a rotating seat, and a rotation driving part is arranged between the rotating seat and the fixed cylinder (9);
the stabilizing blocks (11) are arranged in the fixed cylinder (9), and the centrifugal cylinder (10) is rotatably arranged among the stabilizing blocks (11).
3. The sodium sulfate solution recovery device according to claim 2, wherein the first drainage assembly (300) and the second drainage assembly (400) have the same structure, and the first drainage assembly (300) and the second drainage assembly (400) each comprise:
the multi-stage freezing crystallization equipment (2) and the multi-stage evaporating crystallization equipment (4) are respectively provided with a discharge water pump (12), and the input ends of the two discharge water pumps (12) are respectively communicated with the multi-stage freezing crystallization equipment (2) and the multi-stage evaporating crystallization equipment (4);
the two output ends of the two discharge water pumps (12) are respectively communicated with the discharge pipes (13), and the two discharge pipes (13) are respectively communicated with the melting return cylinder (6) and the liquid discharge cavity.
4. A sodium sulfate solution recovery device according to claim 3, wherein the discharge assembly (500) comprises:
the spiral discharging barrel (14) is communicated with a discharging pipe (15), and the discharging pipe (15) close to the centrifugal mechanism I (100) is communicated with the melting return barrel (6);
the lifting frame (16), the top of the fixed cylinder (9) is provided with the lifting frame (16), the lifting frame (16) is rotationally provided with a lifting screw (17), the lifting frame (16) is provided with a first motor (18), and the output end of the first motor (18) is fixedly connected with the lifting screw (17);
A sliding frame (19), the sliding frame (19) being arranged on the fixed cylinder (9);
lifting ring (20), lifting ring (20) sliding connection be in lifting frame (16) with between sliding frame (19), spiral ejection of compact section of thick bamboo (14) pass through fixed plate (21) with lifting ring (20) fixed connection, lifting ring (20) with lifting screw (17) threaded connection.
5. A sodium sulphate solution recovery apparatus according to claim 4 wherein the liquid draining assembly (600) comprises:
a discharge water tank (22), wherein the discharge water tank (22) is arranged on both the fixed cylinders (9);
the liquid suction pipe (23) is arranged on the fixed plate (21), the liquid suction pipe (23) is connected with the fixed cylinder (9) in a penetrating way, and the liquid suction pipe (23) is communicated with the discharge water tank (22);
a drain water pump (24), wherein the drain water pump (24) is arranged on the drain water tank (22), and the input end of the drain water pump (24) is communicated with the drain water tank (22);
the liquid discharge device comprises a liquid discharge tube (25), wherein a control valve is arranged on the liquid discharge tube (25), the output end of the liquid discharge water pump (24) is communicated with the liquid discharge tube (25), and the liquid discharge tube (25) is communicated with the liquid inlet tube (3) or the liquid supply tube (5).
6. A sodium sulfate solution recovery device according to claim 5, wherein the mixing and draining assembly (700) comprises:
the rotary shaft (26) is rotatably arranged in the melting return cylinder (6), a second motor (27) is arranged on the melting return cylinder (6), and the output end of the second motor (27) is fixedly connected with the rotary shaft (26);
a plurality of stirring rods (28) and a plurality of scraping plates (29), wherein a plurality of stirring rods (28) and a plurality of scraping plates (29) are arranged on the rotating shaft (26);
the liquid supply pump (30), liquid supply pump (30) set up return on the section of thick bamboo (6), the input of liquid supply pump (30) with return a section of thick bamboo (6) intercommunication, the output of liquid supply pump (30) with one of them fixed section of thick bamboo (9) intercommunication.
7. A sodium sulphate solution recovery apparatus according to claim 6, wherein the separation assembly (800) comprises:
the rotating shaft (31) is rotatably arranged on the partition plate (8), a fourth motor (32) is arranged on the separation box body (7), and the output end of the fourth motor (32) is fixedly connected with the rotating shaft (31);
A plurality of mounting frames (33) are arranged on the rotating shaft (31), and a filtering screen plate (34) is arranged on the mounting frames (33);
the crystal discharge device comprises a rotary cylinder (35), wherein the rotary cylinder (35) is arranged in a crystal discharge cavity, a bidirectional screw rod (36) is rotationally arranged in the rotary cylinder (35), a threaded sleeve (37) is connected to the bidirectional screw rod (36) in a threaded mode, a scraping plate (38) is arranged on the threaded sleeve (37), and a linkage assembly (900) is arranged between the bidirectional screw rod (36) and the rotating shaft (31).
8. The sodium sulfate solution recovery device according to claim 7, wherein the linkage assembly (900) comprises:
the meshing sleeve (39) is arranged on the rotating shaft (31) in a sliding manner;
the device comprises a driving wheel (40), wherein a meshing block is arranged on a meshing sleeve (39), the driving wheel (40) is arranged on the meshing block in a meshing manner, the driving wheel (40) is arranged on the meshing sleeve (39) in a sliding manner, the driving wheel (40) is rotatably arranged on a separation box body (7), the driving wheel (40) is also arranged on a bidirectional screw rod (36), and a driving belt (41) is arranged between the two driving wheels (40).
9. A sodium sulfate solution recovery process, characterized in that a sodium sulfate solution recovery device according to claim 8 is used, comprising the steps of:
s1, freezing and crystallizing, namely adding sodium sulfate solution wastewater to be subjected to freezing and crystallizing into a multi-stage freezing and crystallizing device (2) through a liquid inlet pipe (3), condensing sodium sulfate components and moisture in the sodium sulfate solution wastewater into mirabilite through the multi-stage freezing and crystallizing device (2), and finally discharging the wastewater containing the mirabilite into a separation box body (7) through a liquid discharging component I (300) arranged on the multi-stage freezing and crystallizing device (2);
s2, primary separation, after solution is discharged into a liquid discharge cavity, the solution is firstly contacted with a filter sieve plate (34) arranged on a mounting frame (33), the doped mirabilite crystals in the solution are separated through the filter sieve plate (34), the separated wastewater can continuously enter a first centrifugal mechanism (100), when a large amount of mirabilite crystals are remained on one filter sieve plate (34) to influence the filtering efficiency, a fourth motor (32) is started to drive a rotating shaft (31) to rotate, a plurality of mounting frames (33) and the filter sieve plate (34) are enabled to rotate, the separated mirabilite crystals are moved into a crystal discharge cavity, when the rotating shaft (31) rotates, a bidirectional screw rod (36) is driven to rotate through a linkage assembly (900), two threaded sections with opposite threads are arranged on the bidirectional screw rod (36), a threaded sleeve (37) in threaded connection with the threaded sections is driven to move in a rotating cylinder (35), and the mirabilite crystals in the crystal discharge cavity are pushed into a melting cylinder (6) by a scraper (38);
S3, secondary separation, in a centrifugal barrel (10) comprising a first centrifugal mechanism (100) for discharging wastewater containing mirabilite crystals, the centrifugal barrel (10) rotates in a fixed barrel (9) under the drive of a rotation driving part, so that mirabilite crystals in the wastewater are separated from the wastewater, then a first motor (18) on a lifting frame (16) arranged on the first centrifugal mechanism (100) is started, a driving screw is driven to rotate, a lifting ring (20) drives a spiral discharging barrel (14) to descend between the lifting frame (16) and a sliding frame (19) and enter the centrifugal barrel (10), the lifting ring (20) drives a fixed plate (21) and a liquid suction pipe (23) to move into the centrifugal barrel (10) together, liquid in the centrifugal barrel (10) is discharged into a discharge water tank (22) through the liquid suction pipe (24), finally the wastewater is discharged into a discharge barrel (25) through the liquid suction pump (24), a control valve on the discharge barrel (25) is opened, the crystallization wastewater is directly discharged or the wastewater is discharged into the spiral discharging barrel (14) through the liquid suction pump (24), and the wastewater is frozen after the crystallization wastewater is discharged into the discharge barrel (6) and the wastewater is returned to the freezing equipment (6);
S4, back melting, namely after the separated mirabilite crystals and the wastewater containing sodium sulfate crystals are heated by the multi-stage evaporation crystallization equipment (4) are filled into a back melting cylinder (6), starting a second motor (27) to drive a rotating shaft (26) to rotate, enabling sodium sulfate solution and the mirabilite crystals to fully contact through a plurality of stirring rods (28) and a scraping plate (29), accelerating the dissolution speed of the mirabilite crystals, and after the mirabilite is dissolved into sodium sulfate solution, starting a liquid supply pump (30), and conveying the dissolved sodium sulfate solution into a centrifugal mechanism II (200);
s5, thoroughly separating, namely discharging sodium sulfate solution wastewater into a centrifugal mechanism II (200), separating sodium sulfate crystals, discharging the sodium sulfate crystals through a discharging assembly (500) on the centrifugal mechanism II (200), and discharging the separated wastewater into a multistage evaporation crystallization device (4) through a liquid discharging assembly (600) on the centrifugal mechanism II (200) again, so as to continuously perform evaporation crystallization operation on the residual sodium sulfate crystals in the wastewater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311310895.4A CN117326735A (en) | 2023-10-11 | 2023-10-11 | Sodium sulfate solution recovery device and process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311310895.4A CN117326735A (en) | 2023-10-11 | 2023-10-11 | Sodium sulfate solution recovery device and process |
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