A device and process for recovering and utilizing waste gas from non-ferrous metal production to prepare high-purity manganese sulfate.

Abstract

This invention relates to the technical field of waste gas utilization, specifically to an apparatus and process for preparing high-purity manganese sulfate from waste gas generated in non-ferrous metal production. The apparatus includes a filtration device, a purification mechanism, an evaporation mechanism, and a purification mechanism. Operators first obtain hot sulfur dioxide gas using the filtration device, then use the liquid collection tank in the purification mechanism to mix materials to obtain an aqueous manganese sulfate solution. High-purity manganese sulfate is then prepared through evaporation by the evaporation mechanism and purification by the purification mechanism. This equipment has a simple structure, effectively utilizes the heat-containing sulfur dioxide gas to facilitate the high-purity crystallization and production of manganese sulfate, effectively purifies sulfur dioxide waste gas emissions, and simultaneously generates by-products, thus possessing good practicality and economic efficiency, and is beneficial for the promotion and use of the equipment.

Description

Technical Field

[0001] This invention relates to the technical field of waste gas utilization, specifically to an apparatus and process for preparing high-purity manganese sulfate from waste gas generated in non-ferrous metal production. Background Technology

[0002] The manufacturing process of non-ferrous metals usually generates a large amount of waste gas, and direct discharge may be harmful to environmental safety. At the same time, sulfur dioxide accounts for a high proportion of this waste gas. Existing purification methods usually adopt mixed absorption, which is costly and produces negligible by-products.

[0003] In recent years, the demand for manganese sulfate in new energy battery materials has increased, and there are also high requirements for the purity of manganese sulfate. Since some sulfur dioxide needs to be added during the preparation of manganese sulfate, there is an urgent need for a device that can use sulfur dioxide in the waste gas of non-ferrous metals to prepare high-purity, high-net-value manganese sulfate. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the existing technology, the present invention aims to provide a device and process for the production of high-purity manganese sulfate by utilizing non-ferrous metal production waste gas. This device and process is simple in structure and can effectively recover sulfur dioxide from non-ferrous metal waste gas.

[0005] The technical solution adopted in this invention is: a device for preparing high-purity manganese sulfate by utilizing waste gas from non-ferrous metal production, comprising:

[0006] The impurity removal mechanism includes a liquid receiving tank, a filter device on one side of the liquid receiving tank, the filter device being connected to the liquid receiving tank via a gas guide pipe for receiving purified gas, and a sediment collection device inside the impurity removal mechanism to assist the liquid receiving tank in collecting the impurity-removed sediment.

[0007] An evaporation mechanism, comprising an evaporation tank located on the first side of the impurity removal mechanism, the evaporation tank having a through-flow liquid extraction pipe for introducing liquid into the liquid receiving tank, and the evaporation mechanism for discharging water vapor from the liquid in the impurity removal mechanism;

[0008] A purification mechanism is located on one side of the evaporation mechanism. The purification mechanism includes several crystallization tubes. A bottom sealing column is provided at the bottom end of each crystallization tube, and the bottom sealing column is slidably connected to the crystallization tube. A sealing sliding column is provided at the end of each crystallization tube away from the bottom sealing column. The sealing sliding column and the bottom sealing column are connected by a connecting frame. A heating element is provided on the outer periphery of the crystallization tube near the sealing sliding column to heat the liquid portion of the crystallization tube near the sealing sliding column. A temperature-changing element is provided on the outer periphery of the crystallization tube near the bottom sealing column to assist in changing the temperature of the liquid portion of the crystallization tube near the bottom sealing column. A conical funnel is provided at the bottom end of each crystallization tube near the bottom sealing column. A leakage mesh is provided in the middle of the conical funnel. A liquid collection pipe is provided at the bottom of the conical funnel, and the liquid collection pipe is connected to the liquid receiving tank. A return pump is provided in the middle of the liquid collection pipe.

[0009] In one embodiment, the sediment collection device includes a bent plate with its inner end facing the bottom surface of the liquid receiving tank. The two sides of the bent plate do not abut against the inner cavity of the liquid receiving tank. The bottom of the liquid receiving tank is provided with several vertically arranged lifting guide rods. The bent plate is slidably connected to the bent plate through the bent plate. The sediment collection device also includes two sets of triangular guide blocks. The triangular guide blocks are located in the corner areas of the liquid receiving tank near the two sides of the bent plate. The inclined surfaces of the triangular guide blocks are close to the bending side of the bent plate. The liquid receiving tank is provided with a stirring rod along the inner cavity side of the central axis of the bent plate. The two ends of the stirring rod are rotatably connected to the liquid receiving tank. The stirring rod is located between the bent plate and the bottom plate of the liquid receiving tank. The liquid receiving tank is also provided with a drive motor, which drives the stirring rod to rotate.

[0010] In one embodiment, the bending plate is provided with a plurality of floats, which are used to assist the bending plate in suspending in the middle of the liquid in the liquid receiving tank.

[0011] In one embodiment, a telescopic tube is provided on the side of the liquid extraction tube near the bending plate, and an extension connecting rod is provided on the side of the telescopic tube away from the outlet end of the liquid extraction tube. The extension connecting rod is fixedly connected to the outside of the bending plate, and a liquid extraction pump is also provided in the middle of the liquid extraction tube.

[0012] In one embodiment, the evaporator is equipped with a rotating auger and a rotating motor, which drives the rotating auger to rotate and stir the material inside the evaporator. The evaporator is also equipped with a negative pressure pump to create a negative pressure environment inside the evaporator. The evaporator is also equipped with a through steam output pipe, and the end of the steam output pipe away from the evaporator is connected to a cooling tank.

[0013] In one embodiment, a suction pipe is provided at one end of the crystallizing tube near the sealing sliding column, and the other end of the suction pipe away from the crystallizing tube is connected to the inner cavity of the evaporator. A pump is provided at the end of the suction pipe on the side of the inner cavity of the evaporator, and the suction pipe is used to pump the liquid in the evaporator.

[0014] In one embodiment, the heating element includes a plurality of heating fins, which are disposed on the outer periphery of the crystallizing tube near the sealing sliding post. A threaded tube is provided on the outer periphery of the crystallizing tube, which is wound around the crystallizing tube and passes through the middle of the plurality of heating fins. The temperature-changing element includes a plurality of temperature-changing fins, which are arranged in a ring array on one end of the outer periphery of the crystallizing tube near the bottom sealing post. A threaded temperature-changing tube is also provided on the outer periphery of the crystallizing tube, which is wound around the crystallizing tube and passes through the plurality of temperature-changing fins.

[0015] In one embodiment, the purification mechanism further includes a venting component, which includes a temperature-changing tank. A rotating shaft is located along the central axis of the temperature-changing tank. A rotary drive motor is also provided on the temperature-changing tank, driving the rotating shaft to rotate. A rotating block is located in the middle of the rotating shaft, and baffles are provided on both sides of the rotating block. The outer sides of the baffles abut against the inner cavity of the temperature-changing tank. One end of the temperature-changing tank is provided with an outlet pipe and a liquid outlet pipe, symmetrically arranged on the end side of the temperature-changing tank. The outlet pipe and the liquid outlet pipe are located between the abutting surfaces of the two sets of baffles through the through-hole of the temperature-changing tank. One end of the threaded pipe is provided with a gas supply pipe, which is connected to the outlet pipe. One end of the threaded temperature-changing pipe… A water inlet pipe is provided, which is connected to the liquid outlet pipe. A drain pipe is provided at the end of the threaded variable temperature tube away from the water inlet pipe. A gas outlet pipe is connected to a gas supply pipe on the projected side of the other end face of the variable temperature tank where there is no gas outlet pipe. The end of the gas supply pipe away from the variable temperature tank is connected to a gas guide pipe. A liquid replenishment pipe and a coolant outlet pipe are provided in the middle of the outer side of the variable temperature tank. A control valve is provided in the middle of the coolant outlet pipe. A spiral heating tube is provided on the outer side of the evaporator. One end of the spiral heating tube is connected to a recovery heating tube. The recovery heating tube is connected to a vent pipe. The vent pipe is connected to the end of the threaded tube away from the gas replenishment pipe. A heat recovery pipe is provided at the end of the spiral heating tube away from the vent pipe. The heat recovery pipe is connected to the middle of the gas guide pipe.

[0016] In one embodiment, the bottom sealing post is provided with a cross sliding groove at one end near the sealing sliding post. The cross sliding groove is provided with four sets of triangular sliders that abut against each other in a cubic shape. A sliding spring is provided between the triangular sliders and the radial end face of the cross sliding groove. A quarter trapezoidal platform slider is provided on the triangular slider. The four sets of quarter trapezoidal platform sliders abut against each other in a trapezoidal platform.

[0017] In one embodiment, a process for preparing high-purity manganese sulfate by utilizing waste gas from non-ferrous metal production is further included, the specific implementation process being as follows:

[0018] S1. The production waste gas is filtered through a filtration device to generate high-heat sulfur dioxide;

[0019] S2. A mineral slurry is prepared by passing ore material into the liquid receiving tank, and sulfur dioxide is then introduced for a certain period of time.

[0020] S3. After adding other chemicals and waiting for impurities in the solution to precipitate, introduce the solution into the evaporation unit to evaporate the water vapor;

[0021] S4. Add the evaporated supersaturated solution into the crystallizer tube, and use the heating element and the temperature-changing element to create a temperature difference in the crystallizer tube to promote the crystallization of manganese sulfate.

[0022] S5. Repeatedly change the temperature of the variable temperature element to promote high-purity crystallization of manganese sulfate, and then fall through the bottom sealing column into the leakage net in the middle of the conical funnel to complete the collection.

[0023] The beneficial effects of this invention are as follows: This invention provides a simple structure that effectively recovers sulfur dioxide from non-ferrous metal waste gas and simultaneously produces high-purity manganese sulfate from non-ferrous metal production waste gas. The specific implementation method is as follows:

[0024] The operator first passes the exhaust gas through the filter device, which filters out sulfur dioxide. Then, the gas is discharged through the gas pipe. Usually, the exhaust gas temperature is high during the filtration process, so the discharged sulfur dioxide gas retains a certain temperature, which basically meets the needs of subsequent heating and temperature change.

[0025] Next, water and manganese sulfate ore slurry, such as pyrolusite, are added to the receiving tank. Sulfur dioxide is then slowly introduced into the slurry through a gas pipe to ensure full contact. The reaction is allowed to proceed for a certain period of time until the solution turns into a light pink manganese sulfate solution. Then, a stirring rod is driven by a motor to rotate. At the same time, other chemicals are added or the pH value is adjusted to precipitate mineral impurities in the solution. The stirring rod accelerates the mixing process. After the rotation is stopped, the precipitated impurities are guided by the bending plate and flow into the space between two sets of triangular guide blocks for collection. Then, the pumping pipe is started to pump the manganese sulfate aqueous solution into the evaporator. As the aqueous solution in the receiving tank descends, the floats on the bending plate are lowered by the buoyancy of the water until the two sides of the bending plate abut against the inclined surfaces of the triangular guide blocks, and a new round of solution preparation can begin.

[0026] Meanwhile, since the water content of the solution pumped into the evaporator is high, it is necessary to reduce the water content. After hot air is introduced through the spiral heating tube, the aqueous solution in the evaporator is added. At the same time, the pressure inside the evaporator is reduced by the negative pressure pump, which lowers the boiling point of the aqueous solution. The water vapor flows into the cooling tank through the steam output pipe for collection. The rotating auger is started by the rotary motor to stir the aqueous solution to prevent uneven heating in some areas and generate a highly saturated manganese sulfate aqueous solution.

[0027] Afterwards, the connecting frame is raised to remove the sealing sliding column from the crystallization tube. The attached diagram shows the equipment used to raise the connecting frame. Any structure that enables the vertical movement of the connecting frame can be used, so it will not be described in detail. The aqueous solution is pumped into the crystallization tube using the extraction pipe. Then, the connecting frame is lowered so that the sealing sliding column and the bottom sealing column seal both ends of the crystallization tube. Hot air is then introduced into the gas guide pipe through the gas supply pipe. The gas supply pipe is then introduced between the two sets of baffles in the temperature-changing tank. This allows the hot air to flow through the gas outlet pipe and liquid outlet pipe into the threaded temperature-changing tube and the threaded pipe connected by the gas supply pipe and the water inlet pipe. This further heats the heating fins and temperature-changing fins until they reach the temperature inside the crystallization tube. At the same time, the liquid supply pipe is introduced into the area near the temperature-changing tank and the baffles. The liquid is then discharged through the coolant outlet pipe, causing the temperature of the hot air between the two baffles to drop.

[0028] Meanwhile, the hot gas from the threaded tube flows into the hot gas recovery pipe through the vent pipe and then continues into the spiral heating pipe to assist in heating the evaporator. After that, it flows into the hot gas recovery pipe through the spiral heating pipe and then into the gas guide pipe for recovery. The hot gas flowing into the threaded variable temperature pipe can be directly discharged through the drain pipe for collection or connected to the gas guide pipe. The attached diagram does not show the collection system after discharge.

[0029] In the above process, after the manganese sulfate aqueous solution in the crystallization tube is heated to a certain temperature range, crystals begin to precipitate and fall above the slider of the quarter trapezoidal platform under the action of gravity. Then, the rotating shaft of the rotating drive motor is started to rotate a portion of the angle, which further drives the baffle to rotate, causing the outlet pipe and liquid outlet pipe openings to separate from the two sets of baffles. The baffles further divide the inner cavity of the variable temperature tank, so that the outlet pipe and liquid outlet pipe openings are located on both sides of the two sets of baffles. After completion, the hot gas in the gas pipe will not be affected by the cooling water and will only flow into the threaded pipe through the outlet pipe. The coolant in the threaded variable temperature pipe is then discharged through the drain pipe. At this time, the replenishment pipe is used to connect the two sets of baffles in the variable temperature tank. Cooling water is distributed in another area separated by a baffle. The cooling water is discharged into the threaded variable temperature tube through the outlet pipe, causing the liquid below the crystallizer to cool down slowly. A large temperature difference is generated in the crystallizer. During the cooling process, the solubility of the liquid begins to increase, which dissolves some crystals. The liquid above is heated and crystallizes faster, falling to the bottom. The crystals below dissolve on the surface as the liquid temperature drops. Afterward, as the intermolecular interaction decreases, no dissolution occurs, and the crystals are fixed in a crystalline state. This achieves a situation where the crystallizer is partially at low temperature and partially at high temperature. Then, the rotation is driven by a rotary motor to return to the original position, and the crystallizer continues to crystallize all the high-temperature solution in the crystallizer. After repeating this process multiple times, manganese sulfate crystallizes into large crystal particles, thus achieving a high degree of crystallization of manganese sulfate.

[0030] After crystallization, the connecting frame continues to descend, causing the bottom sealing column to detach from the crystallization tube. The lack of constraint from the crystallization tube on the quarter trapezoidal platform slider causes the triangular slider to expand outward under the pulling force of the sliding spring. This allows the crystals attached to the surface of the quarter trapezoidal platform slider to detach and fall into the liquid leakage net in the conical funnel for collection. Excess liquid in the crystallization tube also falls into the collection liquid pipe through the liquid leakage net and is pumped into the receiving tank by the return liquid pump for recovery.

[0031] This equipment has a simple structure and effectively utilizes sulfur dioxide and its heat in industrial waste gas to assist in the production of manganese sulfate. At the same time, it utilizes different heating zones of the heat source to achieve high crystallization of manganese sulfate. It has good practicality and economy, which is beneficial to the promotion and use of the equipment. Attached Figure Description

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0035] Figure 3 This is a three-dimensional cross-sectional structural diagram of the impurity removal mechanism of the present invention;

[0036] Figure 4 This is a three-dimensional cross-sectional structural diagram of the evaporation mechanism of the present invention;

[0037] Figure 5 This is a three-dimensional structural diagram of the purification mechanism of the present invention;

[0038] Figure 6 This is a three-dimensional structural diagram of the purification mechanism of the present invention;

[0039] Figure 7 This is a partial three-dimensional structural schematic diagram of the purification mechanism of the present invention;

[0040] Figure 8 This is the second three-dimensional structural schematic diagram of the purification mechanism of the present invention;

[0041] Figure 9 This is the third three-dimensional structural schematic diagram of the purification mechanism of the present invention;

[0042] Figure 10 This is the fourth three-dimensional structural schematic diagram of the purification mechanism of the present invention;

[0043] Figure 11 This is a partial three-dimensional structural schematic diagram of the purification mechanism of the present invention;

[0044] Figure 12 This is a three-dimensional structural diagram of the pipeline connection of the purification mechanism of the present invention.

[0045] Figure Descriptions: 1. Filtering device; 12. Air guide pipe; 2. Impurity removal mechanism; 21. Liquid receiving tank; 22. Bending plate; 221. Lifting guide rod; 23. Float; 24. Stirring rod; 241. Drive motor; 25. Triangular guide block; 3. Evaporation mechanism; 31. Liquid extraction pipe; 311. Telescopic pipe; 312. Extension connecting rod; 32. Liquid extraction pump; 33. Evaporation tank; 34. Rotary auger; 341. Rotary motor; 35. Negative pressure pump; 36. Steam output pipe; 361. Cooling tank; 4. Purification mechanism; 41. Material extraction pipe; 42. Crystallization tube; 421. Heating fins; 422. Threaded pipe; 4221. Air supply pipe; 4222. Liquid discharge pipe; 4223. Vent pipe; 423. Variable temperature fins; 424. Threaded variable temperature tube; 425. Water inlet pipe; 43. Connecting frame; 44. Sealing sliding column; 45. Bottom sealing column; 451. Quarter trapezoidal platform slider; 452. Cross sliding groove; 453. Triangular slider; 454. Sliding spring; 46. Conical funnel; 461. Leakage net; 462. Liquid collection pipe; 463. Return pump; 47. Variable temperature tank; 471. Gas supply pipe; 472. Liquid replenishment pipe; 473. Coolant outlet pipe; 474. Control valve; 475. Gas outlet pipe; 476. Liquid outlet pipe; 477. Barrier baffle; 478. Rotating block; 479. Rotating shaft; 4791. Rotary drive motor; 48. Recovery heating tube; 481. Spiral heating tube; 482. Heat recovery tube. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] The following is combined with Figure 1-12 This invention describes a specific embodiment of a device for preparing high-purity manganese sulfate from waste gas from non-ferrous metal production, comprising:

[0049] The impurity removal mechanism 2 includes a liquid receiving tank 21. A filter device 1 is provided on one side of the liquid receiving tank 21. Specifically, the filter device 1 uses molecular sieves or the like to filter, absorb and discharge sulfur dioxide in the production waste gas. This is existing technology and will not be described in detail. The attached drawings are simplified and are only used to show the implementation method. The filter device 1 is connected to the liquid receiving tank 21 by a gas guide pipe 12 to receive the purified gas. The impurity removal mechanism 2 is provided with a sedimentation collection device to assist the liquid receiving tank 21 in collecting the impurity-removed sediment.

[0050] Evaporation mechanism 3 includes evaporation tank 33, which is located on the first side of impurity removal mechanism 2. Evaporation tank 33 is provided with a through liquid extraction pipe 31, which is used to introduce liquid into liquid receiving tank 21. Evaporation mechanism 3 is used to discharge liquid water vapor from impurity removal mechanism 2.

[0051] Purification mechanism 4 is located on one side of evaporation mechanism 3. Purification mechanism 4 includes several crystallization tubes 42. A bottom sealing column 45 is provided at the bottom end of each crystallization tube 42, and the bottom sealing column 45 is slidably connected to the crystallization tube 42. A sealing sliding column 44 is provided at the end of the crystallization tube 42 away from the bottom sealing column 45. The sealing sliding column 44 and the bottom sealing column 45 are connected by a connecting frame 43. A heating element is provided on the outer periphery of the crystallization tube 42 near the sealing sliding column 44 to heat the liquid inside the crystallization tube 42 near the sealing sliding column 44. A temperature-changing element is provided on the outer periphery of the crystallization tube 42 near the bottom sealing column 45 to assist in changing the temperature of the liquid inside the crystallization tube 42 near the bottom sealing column 45. Specifically, the heating element includes several heating fins 421. 21 is located on the outer side of the crystallizing tube 42 near the sealing sliding column 44. The outer side of the crystallizing tube 42 is provided with a threaded tube 422 that winds around the crystallizing tube 42 and passes through the middle of several heating fins 421. The temperature-changing component includes several temperature-changing fins 423. The several temperature-changing fins 423 are arranged in a ring array at one end of the outer side of the crystallizing tube 42 near the bottom sealing column 45. The outer side of the crystallizing tube 42 is also provided with a threaded temperature-changing tube 424 that winds around the crystallizing tube 42 and passes through several temperature-changing fins 423. The bottom end of the crystallizing tube 42 near the bottom sealing column 45 is provided with a conical funnel 46. The middle of the conical funnel 46 is provided with a liquid leakage net 461. The bottom of the conical funnel 46 is provided with a liquid collection pipe 462. The liquid collection pipe 462 is connected to the liquid receiving tank 21. The middle of the liquid collection pipe 462 is provided with a return pump 463.

[0052] Beneficially, the sediment collection component includes a bent plate 22, with its inner end facing the bottom of the liquid receiving tank 21. The sides of the bent plate 22 do not abut against the inner cavity of the liquid receiving tank 21. The bottom of the liquid receiving tank 21 is provided with several vertically arranged lifting guide rods 221 through which the bent plate 22 is observed and slidably connected. The sediment collection component also includes two sets of triangular guide blocks 25, located in the angled areas of the liquid receiving tank 21 near the sides of the bent plate 22. The inclined surfaces of the triangular guide blocks 25 are close to the bending sides of the bent plate 22. The inner cavity of the liquid receiving tank 21 along the central axis of the bent plate 22 is provided with a stirring rod 24, whose two ends are rotatably connected to the liquid receiving tank 21. The stirring rod 24 is located on the bent plate 22. Between the bottom plate of the liquid receiving tank 21 and the base plate of the liquid receiving tank 21, a drive motor 241 is also provided on the liquid receiving tank 21. The drive motor 241 drives the stirring rod 24 to rotate. At the same time, several floats 23 are provided on the bending plate 22. The floats 23 are used to assist the bending plate 22 in suspending in the middle of the liquid in the liquid receiving tank 21. The attached drawing adopts a simplified drawing method and is not the actual structure. It is just to make the bending plate 22 suspend in the liquid. It is beneficial that the liquid extraction pipe 31 is provided with a telescopic pipe 311 on the side near the bending plate 22. The telescopic pipe 311 is provided with an extension connecting rod 312 on the side away from the outlet end of the liquid extraction pipe 31. The extension connecting rod 312 is fixedly connected to the outside of the bending plate 22. A liquid extraction pump 32 is also provided in the middle of the liquid extraction pipe 31.

[0053] Beneficially, the evaporator 33 is equipped with a rotating auger 34 and a rotating motor 341. The rotating motor 341 drives the rotating auger 34 to rotate and stir the material inside the evaporator 33. The evaporator 33 is also equipped with a negative pressure pump 35 to create a negative pressure environment inside the evaporator 33. The evaporator 33 is also equipped with a through steam output pipe 36. The end of the steam output pipe 36 away from the evaporator 33 is connected to a cooling tank 361. The cooling tank 361 can cool the water vapor inside the tank into liquid through air cooling or water cooling, which is existing technology, so it is not shown in the attached figure.

[0054] In practice, a rotary motor 341 is used to start a rotary auger 34 to stir the aqueous solution, preventing uneven heating in some areas and generating a highly saturated manganese sulfate aqueous solution.

[0055] Beneficially, a material extraction pipe 41 is provided at one end of the crystallization tube 42 near the sealing sliding column 44. The end of the material extraction pipe 41 away from the crystallization tube 42 is connected to the inner cavity of the evaporator 33. A pump is provided at the end of the material extraction pipe 41 on the inner cavity side of the evaporator 33. The material extraction pipe 41 is used to pump the liquid in the evaporator 33.

[0056] Beneficially, the purification mechanism 4 also includes a venting component, which includes a temperature-controlled tank 47. A rotating shaft 479 is located along the central axis of the temperature-controlled tank 47. A rotary drive motor 4791 is also provided on the temperature-controlled tank 47, driving the rotating shaft 479 to rotate. A rotating block 478 is located in the middle of the rotating shaft 479, and baffles 477 are provided on both sides of the rotating block 478. The outer sides of the baffles 477 abut against the inner cavity of the temperature-controlled tank 47. One end of the 7 is provided with an air outlet pipe 475 and a liquid outlet pipe 476, which are symmetrically arranged on the end side of the temperature-changing tank 47. The air outlet pipe 475 and the liquid outlet pipe 476 are located between the abutting surfaces of two sets of baffles 477 through the through hole of the temperature-changing tank 47. One end of the threaded pipe 422 is provided with a gas supply pipe 4221, which is connected to the air outlet pipe 475. One end of the threaded temperature-changing pipe 424 is provided with a water inlet pipe 425, which is connected to the water inlet pipe 424. Pipe 425 is connected to liquid outlet pipe 476. The threaded variable temperature pipe 424 has a drain pipe 4222 at the end furthest from the water inlet pipe 425. Gas outlet pipe 475 is connected to a gas supply pipe 471 on the projected side of the other end face of the variable temperature tank 47 where no gas outlet pipe 475 is located. The end of gas supply pipe 471 furthest from the variable temperature tank 47 is connected to a gas guide pipe 12. A liquid replenishment pipe 472 and a coolant outlet pipe 473 are located in the middle of the outer periphery of the variable temperature tank 47. The coolant outlet pipe 473 has a... There is a control valve 474. The outer side of the evaporator 33 is provided with a spiral heating tube 481. One end of the spiral heating tube 481 is connected to the recovery heating tube 48. The recovery heating tube 48 is connected to a vent pipe 4223. The vent pipe 4223 is connected to the end of the threaded pipe 422 away from the gas supply pipe 4221. The end of the spiral heating tube 481 away from the vent pipe 4223 is provided with a heat recovery pipe 482. The heat recovery pipe 482 is connected to the middle of the gas guide pipe 12.

[0057] Beneficially, the bottom sealing post 45 is provided with a cross sliding groove 452 at one end near the sealing sliding post 44. In the middle of the cross sliding groove 452, there are four sets of triangular sliders 453 that abut against each other in a cubic shape. A sliding spring 454 is provided between the triangular sliders 453 and the radial end face of the cross sliding groove 452. A quarter trapezoidal platform slider 451 is provided on the triangular slider 453. The four sets of quarter trapezoidal platform sliders 451 abut against each other in a trapezoidal platform.

[0058] All of the above pipelines are unidirectional and are equipped with pumps, valves, check valves, etc., which are conventional means of connecting existing pipelines. They are not shown in the attached diagram, so they will not be described in detail.

[0059] In practice, the connecting frame 43 continues to descend, causing the bottom sealing column 45 to detach from the crystallizing tube 42. The quarter trapezoidal platform slider 451 lacks the constraint effect of the crystallizing tube 42. Under the pulling force of the sliding spring 454, the triangular slider 453 causes the quarter trapezoidal platform slider 451 to expand in all directions, causing the crystals attached to the surface of the quarter trapezoidal platform slider 451 to detach and fall into the leakage net 461 in the conical funnel 46 for collection. The excess liquid in the crystallizing tube 42 also falls into the collection liquid pipe 462 through the leakage net 461 and is pumped into the receiving tank 21 by the return pump 463 for recycling.

[0060] Beneficially, it also includes a process for preparing high-purity manganese sulfate from waste gas generated during non-ferrous metal production. The specific implementation process is as follows:

[0061] S1. The production waste gas is filtered through filter device 1 to generate high-heat sulfur dioxide;

[0062] S2. A mineral slurry is prepared by introducing ore material into the liquid receiving tank 21, and sulfur dioxide is introduced for a certain period of time.

[0063] S3. After adding other chemicals and waiting for impurities in the solution to precipitate, introduce the solution into the evaporation unit 3 to evaporate water vapor;

[0064] S4. Add the evaporated supersaturated solution into the crystallizer tube 42, and use the heating element and the temperature-changing element to create a temperature difference in the crystallizer tube 42 to promote the crystallization of manganese sulfate.

[0065] S5. Repeatedly change the temperature of the variable temperature element to promote high-purity crystallization of manganese sulfate, and then fall through the bottom sealing column 45 into the leakage net 461 in the middle of the conical funnel 46 to complete the collection.

[0066] Working principle of this invention:

[0067] The operator first passes the exhaust gas through the filter device 1, which filters out sulfur dioxide. Then, the exhaust gas continues to pass through the gas guide pipe 12 and waits to be discharged. Usually, the exhaust gas temperature is high during the filtration process, so the discharged sulfur dioxide gas retains a certain temperature, which basically meets the subsequent heating and temperature change requirements.

[0068] Next, water and manganese sulfate ore slurry, such as pyrolusite, are added to the receiving tank 21. Then, sulfur dioxide is slowly introduced into the slurry through the gas pipe 12 to ensure full contact. The reaction is allowed to proceed for a certain period of time until the solution becomes a light pink manganese sulfate solution. Then, the stirring rod 24 is driven to rotate by the drive motor 241. At the same time, other chemicals are added or the pH value is adjusted to precipitate mineral impurities in the solution. The mixing is accelerated by the stirring rod 24. After the rotation is stopped, the precipitated impurities are guided by the bending plate 22 and flow into the space between the two sets of triangular guide blocks 25 for collection. Then, the liquid extraction pipe 31 is started and the liquid extraction pump 32 is used to pump the aqueous solution of manganese sulfate into the evaporator 33. At the same time, as the aqueous solution in the receiving tank 21 descends, the float 23 on the bending plate 22 is lowered by the buoyancy of the water until the two sides of the bending plate 22 abut against the inclined surface of the triangular guide block 25, and a new wave of solution preparation process can begin.

[0069] Meanwhile, since the solution pumped into the evaporator 33 has a high water content, it is necessary to reduce the water content. After hot air is introduced through the spiral heating tube 481, the aqueous solution in the evaporator 33 is added. At the same time, the negative pressure pump 35 reduces the pressure inside the evaporator 33, lowering the boiling point of the aqueous solution. The water vapor flows into the cooling tank 361 through the steam output pipe 36 for collection. The rotating auger 34 is started by the rotating motor 341 to stir the aqueous solution, preventing uneven heating in some areas and generating a highly saturated manganese sulfate aqueous solution.

[0070] Afterwards, the connecting frame 43 is raised to detach the sealing sliding column 44 from the crystallization tube 42. The attached diagram shows the equipment used to raise the connecting frame 43. Any structure can achieve the vertical movement of the connecting frame 43, so it will not be described in detail. The aqueous solution is pumped into the crystallization tube 42 using the extraction pipe 41. Then, the connecting frame 43 is lowered so that the sealing sliding column 44 and the bottom sealing column 45 seal both ends of the crystallization tube 42. After hot air is introduced into the gas guide pipe 12 through the gas supply pipe 471, the gas supply pipe 471 is connected to the two sets of barriers in the temperature-changing tank 47. Between the plates 477, hot air flows through the air outlet pipe 475 and the liquid outlet pipe 476 into the threaded variable temperature pipe 424 and the threaded pipe 422 connected to the air supply pipe 4221 and the water inlet pipe 425, further heating the heating fins 421 and the variable temperature fins 423 until the temperature inside the heating crystallizer 42 is reached. At the same time, the liquid supply pipe 472 is passed into the area near the temperature change tank 47 and the barrier baffle 477, and then discharged through the coolant outlet pipe 473, causing the temperature of the hot air between the two barrier baffles 477 to drop.

[0071] Meanwhile, the hot gas from the threaded pipe 422 flows into the hot gas recovery pipe 482 through the vent pipe 4223 and then continues to flow into the spiral heating pipe 481 to assist in heating the evaporator 33. After that, it flows into the hot gas recovery pipe 482 through the spiral heating pipe 481 and then into the gas guide pipe 12 for recovery. The hot gas flowing into the threaded variable temperature pipe 424 can be directly discharged through the drain pipe 4222 for collection or connected to the gas guide pipe 12. The collection system after discharge is not shown in the attached figure.

[0072] In the above implementation process, after the manganese sulfate aqueous solution in the crystallization tube 42 is heated to a certain temperature range, crystals begin to precipitate and fall under the action of gravity onto the quarter trapezoidal platform slider 451. Then, the rotary drive motor 4791 is started to rotate the rotating shaft 479 of a certain angle, which further drives the baffle 477 to rotate, so that the outlet pipe 475 and the liquid outlet pipe 476 are separated from the two sets of baffles 477. The baffles 477 are then used to further divide the inner cavity area of ​​the variable temperature tank 47, so that the outlet pipe 475 and the liquid outlet pipe 476 are located on both sides of the two sets of baffles 477. After completion, the hot gas in the gas pipe 471 will not be affected by the cooling water and will only flow into the threaded pipe 422 through the outlet pipe 475. Then, the coolant in the threaded variable temperature tube 424 is discharged through the drain pipe 4222. At this time, the... Cooling water is introduced into another area separated by two sets of baffles 477 inside the variable temperature tank 47 through the replenishment pipe 472. The cooling water is discharged into the threaded variable temperature tube 424 through the outlet pipe 476, causing the liquid below the crystallizer tube 42 to cool down slowly. A large temperature difference is generated in the crystallizer tube 42. During the cooling process, the solubility of the liquid begins to increase, which will dissolve some crystals. The liquid above is heated and crystallizes faster, falling to the bottom. The crystals below dissolve on the surface as the liquid temperature drops. Afterward, as the liquid temperature drops, the intermolecular interaction decreases, so no dissolution occurs and the crystals are fixed in a crystalline state. This achieves a situation where part of the crystallizer tube 42 is at a low temperature and part at a high temperature. Then, the rotary drive motor 4791 is used to rotate and return to the original position, and the crystallizer tube 42 continues to crystallize all the high-temperature solution. After repeating this process many times, manganese sulfate crystallizes into large crystal particles, thus achieving a high degree of crystallization of manganese sulfate.

[0073] After crystallization, the connecting frame 43 continues to descend, causing the bottom sealing column 45 to detach from the crystallization tube 42. The quarter trapezoidal platform slider 451, lacking the constraint effect of the crystallization tube 42, causes the triangular slider 453 to expand outward under the pulling force of the sliding spring 454. This causes the crystals attached to the surface of the quarter trapezoidal platform slider 451 to detach and fall into the drip net 461 in the conical funnel 46 for collection. Excess liquid in the crystallization tube 42 also falls into the collection liquid pipe 462 through the drip net 461 and is pumped into the receiving tank 21 by the return pump 463 for recovery.

[0074] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0075] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A device for preparing high-purity manganese sulfate from waste gas from non-ferrous metal production, characterized in that: include The impurity removal mechanism (2) includes a liquid receiving tank (21), and a filter device (1) is provided on one side of the liquid receiving tank (21). The filter device (1) is connected to the liquid receiving tank (21) by a gas guide pipe (12) to receive purified gas. The impurity removal mechanism (2) is provided with a sediment collection device to assist the liquid receiving tank (21) in collecting the impurity-removed sediment. Evaporation mechanism (3), the evaporation mechanism (3) includes an evaporation tank (33), the evaporation tank (33) is located on the first side of the impurity removal mechanism (2), the evaporation tank (33) is provided with a through liquid extraction pipe (31), the liquid extraction pipe (31) is used to introduce liquid into the liquid receiving tank (21), and the evaporation mechanism (3) is used to discharge liquid water vapor in the impurity removal mechanism (2); A purification mechanism (4) is located on one side of the evaporation mechanism (3). The purification mechanism (4) includes several crystallization tubes (42). The bottom end of each crystallization tube (42) is provided with a bottom sealing column (45). The bottom sealing column (45) is slidably connected to the crystallization tube (42). A sealing sliding column (44) is provided at the end of the crystallization tube (42) away from the bottom sealing column (45). The sealing sliding column (44) and the bottom sealing column (45) are connected by a connecting frame (43). The outer periphery of the crystallization tube (42) near the sealing sliding column (44) is provided with... A heating element is provided to heat the liquid in the crystallizer (42) near the sealing sliding column (44). A temperature-changing element is provided on the outer side of the crystallizer (42) near the bottom sealing column (45) to assist in changing the temperature of the liquid in the crystallizer (42) near the bottom sealing column (45). A conical funnel (46) is provided at the bottom end of the crystallizer (42) near the bottom sealing column (45). A liquid leakage net (461) is provided in the middle of the conical funnel (46). A liquid collection pipe (462) is provided at the bottom of the conical funnel (46). The liquid collection pipe (462) is connected to the... The liquid receiving tank (21) is provided with a return pump (463) in the middle of the liquid collection pipe (462); the sediment collection component includes a bent plate (22), the inner end of the bent plate (22) faces the bottom surface of the liquid receiving tank (21), the two sides of the bent plate (22) do not abut against the inner cavity of the liquid receiving tank (21), the bottom of the liquid receiving tank (21) is provided with several vertically arranged lifting guide rods (221), the bent plate (22) is observed to pass through and slide connected to the bent plate (22), the sediment collection component also includes two sets of triangular guide blocks (25), the triangular guide blocks (25) are located on the The liquid receiving tank (21) is located near the corner area on both sides of the bending plate (22). The inclined surface of the triangular guide block (25) is close to the bending side of the bending plate (22). The liquid receiving tank (21) is provided with a stirring rod (24) along the inner cavity side of the central axis of the bending plate (22). The two ends of the stirring rod (24) are rotatably connected to the liquid receiving tank (21). The stirring rod (24) is located between the bending plate (22) and the bottom plate of the liquid receiving tank (21). The liquid receiving tank (21) is also provided with a drive motor (241). The drive motor (241) drives the stirring rod (24) to rotate.

2. The apparatus for preparing high-purity manganese sulfate from non-ferrous metal production waste gas according to claim 1, characterized in that: The bending plate (22) is provided with several floats (23), which are used to assist the bending plate (22) in suspending in the middle of the liquid in the liquid receiving tank (21).

3. The apparatus for preparing high-purity manganese sulfate from non-ferrous metal production waste gas according to claim 2, characterized in that: The liquid extraction tube (31) is provided with a telescopic tube (311) on the side near the bending plate (22), and an extension connecting rod (312) is provided on the side of the telescopic tube (311) away from the outlet end of the liquid extraction tube (31). The extension connecting rod (312) is fixedly connected to the outside of the bending plate (22). The liquid extraction tube (31) is also provided with a liquid extraction pump (32) in the middle.

4. The apparatus for preparing high-purity manganese sulfate from non-ferrous metal production waste gas according to claim 2, characterized in that: The evaporator (33) is equipped with a rotating auger (34) and a rotating motor (341). The rotating motor (341) drives the rotating auger (34) to rotate and stir the material inside the evaporator (33). The evaporator (33) is also equipped with a negative pressure pump (35) to create a negative pressure environment inside the evaporator (33). The evaporator (33) is also equipped with a through steam output pipe (36). The end of the steam output pipe (36) away from the evaporator (33) is connected to a cooling tank (361).

5. The apparatus for preparing high-purity manganese sulfate from non-ferrous metal production waste gas according to claim 1, characterized in that: The crystallizing tube (42) is provided with a suction pipe (41) at one end near the sealing sliding column (44). The end of the suction pipe (41) away from the crystallizing tube (42) is connected to the inner cavity of the evaporator (33). The suction pipe (41) is provided with a pump at the inner cavity side end of the evaporator (33). The suction pipe (41) is used to pump the liquid in the evaporator (33).

6. The apparatus for preparing high-purity manganese sulfate from non-ferrous metal production waste gas according to claim 5, characterized in that: The heating element includes several heating fins (421), which are disposed on the outer periphery of the crystallizing tube (42) near the sealing sliding post (44). The outer periphery of the crystallizing tube (42) is provided with a threaded tube (422) that winds around the crystallizing tube (42) and passes through the middle of the several heating fins (421). The temperature-changing element includes several temperature-changing fins (423), which are arranged in a ring array on the outer periphery of the crystallizing tube (42) near the bottom sealing post (45). The outer periphery of the crystallizing tube (42) is also provided with a threaded temperature-changing tube (424) that winds around the crystallizing tube (42) and passes through the several temperature-changing fins (423).

7. The apparatus for preparing high-purity manganese sulfate from non-ferrous metal production waste gas according to claim 6, characterized in that: The purification mechanism (4) further includes a venting component, which includes a temperature-controlled tank (47). A rotating shaft (479) is provided along the central axis of the temperature-controlled tank (47). A rotary drive motor (4791) is also provided on the temperature-controlled tank (47). The rotary drive motor (4791) drives the rotating shaft (479) to rotate. A rotating block (478) is provided in the middle of the rotating shaft (479). Barrier baffles (477) are provided on both sides of the rotating block (478). The outer periphery of the barrier baffles (477) abuts against the inner cavity of the temperature-controlled tank (47). One end is provided with an outlet pipe (475) and a liquid outlet pipe (476). The outlet pipe (475) and the liquid outlet pipe (476) are symmetrically arranged on the end side of the temperature-changing tank (47). The outlet pipe (475) and the liquid outlet pipe (476) are located between the contact surfaces of two sets of baffles (477) in the through hole of the temperature-changing tank (47). One end of the threaded pipe (422) is provided with a gas supply pipe (4221), which is connected to the outlet pipe (475). One end of the threaded temperature-changing pipe (424) is provided with a water inlet pipe (425). A water inlet pipe (425) is connected to the liquid outlet pipe (476). A drain pipe (4222) is provided at the end of the threaded variable temperature pipe (424) away from the water inlet pipe (425). A gas outlet pipe (475) is connected to a gas delivery pipe (471) on the projected side of the other end face of the variable temperature tank (47) where no gas outlet pipe (475) is provided. A gas delivery pipe (12) is connected at the end of the gas delivery pipe (471) away from the variable temperature tank (47). A liquid replenishment pipe (472) and a coolant outlet pipe (473) are provided in the middle of the outer periphery of the variable temperature tank (47). A coolant outlet pipe (473) is provided in the middle of... There is a control valve (474). The outer side of the evaporator (33) is provided with a spiral heating tube (481) that fits closely. One end of the spiral heating tube (481) is connected to a recovery heating tube (48). The recovery heating tube (48) is connected to a vent pipe (4223). The vent pipe (4223) is connected to the end of the threaded pipe (422) away from the gas supply pipe (4221). The end of the spiral heating tube (481) away from the vent pipe (4223) is provided with a heat recovery pipe (482). The heat recovery pipe (482) is connected to the middle of the gas guide pipe (12).

8. The apparatus for preparing high-purity manganese sulfate from non-ferrous metal production waste gas according to claim 6, characterized in that: The bottom sealing post (45) is provided with a cross sliding groove (452) at one end near the sealing sliding post (44). The cross sliding groove (452) is provided with four sets of triangular sliders (453) that abut against each other in a cubic shape. A sliding spring (454) is provided between the triangular slider (453) and the radial end face of the cross sliding groove (452). A quarter trapezoidal platform slider (451) is provided on the triangular slider (453). The four sets of quarter trapezoidal platform sliders (451) abut against each other in a trapezoidal shape.

9. A process for preparing high-purity manganese sulfate from waste gas generated during non-ferrous metal production, using the apparatus for preparing high-purity manganese sulfate from waste gas generated during non-ferrous metal production as described in any one of claims 1-8, characterized in that: The specific implementation process is as follows: S1. The production waste gas is filtered through a filter device (1) to generate high-heat sulfur dioxide; S2. The ore material is introduced into the liquid receiving tank (21) to make slurry, and sulfur dioxide is introduced for a certain period of time; S3. After adding other drugs and waiting for impurities in the solution to precipitate, introduce them into the evaporation mechanism (3) to evaporate water vapor; S4. The supersaturated solution after evaporation is added into the crystallization tube (42), and the temperature difference inside the crystallization tube (42) is created by heating with a heating element and a temperature-changing element to promote the crystallization of manganese sulfate. S5. Repeatedly change the temperature of the variable temperature element to promote high-purity crystallization of manganese sulfate, and then fall through the bottom sealing column (45) into the leakage net (461) in the middle of the conical funnel (46) to complete the collection.

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