MVR evaporation system for ammonium sulfate wastewater treatment

Abstract

The application discloses an MVR evaporation system for ammonium sulfate wastewater treatment, which comprises a first shell, a biological purification assembly matched with the first shell body, and a first shell body integrally formed in the inside of the first shell body, a plurality of uniformly distributed first through holes are formed in the side wall of the first shell body, a filtering structure matched with the first through hole is installed on the first shell body, and a first cavity is formed between the first shell body and the first shell body, the biological purification assembly comprises a second sealing cover, the upper end of the second sealing cover is fixedly connected with a support, the support is fixedly connected with a second motor, a first threaded rod matched with the third cavity is installed on the third connecting rod, and a biological carrier is detachably installed on the first threaded rod. Compared with the prior art, the application can save labor cost, the product of the biological purification assembly can be used in the purification tank, secondary utilization of resources is realized, sustainable development and environmental protection requirements are met, and stable operation of the MVR evaporation system is ensured.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to an MVR evaporation system for treating ammonium sulfate wastewater. Background Technology

[0002] In wastewater treatment, MVR (Mechanical Vapor Recompression) thickeners are widely used because they can effectively recover useful substances from wastewater and reduce final emissions. However, to ensure stable operation of MVR thickeners and improve treatment efficiency, wastewater must first be pretreated to remove solid impurities.

[0003] While current pretreatment technologies can remove most particulate impurities from wastewater, their effectiveness in treating specific types of wastewater, such as ammonium sulfate wastewater, still needs improvement. Although some existing pretreatment devices can remove impurities to a certain extent, their operating costs are high and they require frequent manual intervention, such as replacing filter media. This not only increases equipment maintenance costs but also leads to low water and energy utilization efficiency, failing to meet the needs of sustainable development and environmental protection goals, and affecting the operational stability of MVR concentration equipment.

[0004] Therefore, developing more efficient, low-cost, and environmentally friendly pretreatment equipment has become an urgent problem to be solved.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an MVR evaporation system for treating ammonium sulfate wastewater, which can solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0008] An MVR evaporation system for treating ammonium sulfate wastewater includes a first shell and a biological purification component that matches the first cylinder. The first cylinder is integrally formed inside the first shell. The first cylinder has a second opening and a third opening. Multiple evenly distributed first through holes are formed on the side wall of the first cylinder. A filter structure matching the first through holes is installed on the first cylinder. A first opening is provided at the lower end of the first shell, and a first cavity is formed between the first shell and the first cylinder. The biological purification component includes a second sealing cover. A bracket is fixedly connected to the upper end of the second sealing cover, and a second... The first motor has a third connecting rod fixedly connected to its output shaft. The third connecting rod has a wastewater conveying channel and a third cavity inside. A first rotary joint and a second rotary joint, matching the wastewater conveying channel and the third cavity, are fixedly connected to the third connecting rod. Wastewater conveying pipes and bacterial liquid conveying pipes are respectively installed on the first and second rotary joints. A first threaded rod, matching the third cavity, is installed on the third connecting rod. A biological carrier is detachably installed on the first threaded rod, and microorganisms for purifying ammonium sulfate wastewater are attached to the biological carrier. A first through hole is fixedly connected to the outer wall of the first cylinder. A matching hole position control mechanism is provided, which is used to open, close, and adjust the opening degree of the first through hole. The hole position control mechanism includes a second cylinder with a second through hole matching the first through hole. A limit stop is fixedly connected to the upper end of the second cylinder, and a limit plate matching the limit stop is fixedly connected to the upper end of the first housing facing the first cylinder. The second cylinder is mounted on the limit plate via the limit stop, and multiple rotatable ball bearings are fixedly connected to the limit plate. A gear ring is fixedly connected to the outer wall of the second cylinder, and a first motor is mounted on the first housing. The output shaft of the first motor passes through the first housing, and a helical gear matching the gear ring is fixedly connected to the output shaft of the first motor; the second cylinder has a mounting hole located on one side of the second through hole, and an aeration assembly matching the mounting hole is installed on the second cylinder. The aeration assembly includes a main air supply pipe, and a branch air supply pipe matching the mounting hole is fixedly connected to the main air supply pipe. A nozzle is installed on the branch air supply pipe; a first electromagnetic block is fixedly connected to the bottom wall of the mounting hole, and a second electromagnetic block matching the first electromagnetic block is fixedly connected to the nozzle. The first electromagnetic block and the second electromagnetic block cooperate to control the nozzle to slide in the mounting hole.

[0009] In one or more embodiments of the present invention, a first valve matching the third opening is fixedly connected to the first cylinder, and a drain port is fixedly connected to the end of the first valve away from the first cylinder. The drain port extends out from the first opening. A first sealing cover matching the first opening is installed on the first housing. The first sealing cover is threadedly connected to the first housing. A protrusion is provided on the first sealing cover. The protrusion is located between the first housing and the drain port and seals the gap formed between the first housing and the drain port. A mesh plate is provided at the upper end of the protrusion. A second cavity is opened on the protrusion. A water outlet pipe matching the second cavity is fixedly connected to the first sealing cover.

[0010] In one or more embodiments of the present invention, the first cavity is filled with filter packing material, which can be discharged from the gap between the first housing and the drain port, and the first housing is provided with a feeding port that matches the first cavity.

[0011] In one or more embodiments of the present invention, the hole position control mechanism includes a second cylinder, the second cylinder having a second through hole matching the second opening, a limiting flange fixedly connected to the upper end of the second cylinder, a limiting plate matching the limiting flange fixedly connected to the upper end of the first housing facing the first cylinder, the second cylinder being mounted on the limiting plate via the limiting flange, a plurality of rotatable balls fixedly connected to the limiting plate, a gear ring fixedly connected to the outer wall of the second cylinder, a first motor mounted on the first housing, the output shaft of the first motor penetrating the first housing, and a helical gear matching the gear ring fixedly connected to the output shaft of the first motor.

[0012] In one or more embodiments of the present invention, the second cylinder is provided with an installation hole located on one side of the second through hole. An aeration assembly matching the installation hole is installed on the second cylinder. The aeration assembly includes a main air supply pipe, a branch air supply pipe matching the installation hole is fixedly connected to the main air supply pipe, and a nozzle is installed on the branch air supply pipe. A first electromagnetic block is fixedly connected to the bottom wall of the installation hole, and a second electromagnetic block matching the first electromagnetic block is fixedly connected to the nozzle. The first electromagnetic block and the second electromagnetic block cooperate to control the nozzle to slide in the installation hole.

[0013] In one or more embodiments of the present invention, the nozzle has a plurality of spray holes, and an anti-clogging ball is movably connected inside the nozzle. The outer diameter of the anti-clogging ball is larger than the inner diameter of the air supply pipe. A first connecting rod is fixedly connected to the anti-clogging ball, and the first connecting rod passes through the middle of the nozzle. The first connecting rod is used to limit the movement direction of the anti-clogging ball inside the nozzle. A spring is sleeved on the first connecting rod, and the spring is located between the anti-clogging ball and the nozzle. One end of the first connecting rod protrudes from the outer wall of the nozzle. A second connecting rod is fixedly connected to the end of the first connecting rod protruding from the outer wall of the nozzle. A plug matching the spray hole is fixedly connected to the second connecting rod.

[0014] In one or more embodiments of the present invention, a circulating air supply component for supplying air to the aeration component is further included. The circulating air supply component includes a pump, the air inlet of the pump is fixedly connected to a first air supply pipe, the air outlet of the pump is fixedly connected to a second air supply pipe, the end of the second air supply pipe away from the pump is fixedly connected to a gas treatment component, and the end of the gas treatment component away from the second air supply pipe is fixedly connected to a fourth air supply pipe, the fourth air supply pipe being connected to the main air supply pipe.

[0015] In one or more embodiments of the present invention, a third gas supply pipe is fixedly connected to the second gas supply pipe, and a fifth gas supply pipe is fixedly connected to the fourth gas supply pipe. A second valve for controlling the passage is provided on the second gas supply pipe, the third gas supply pipe, the fourth gas supply pipe, and the fifth gas supply pipe.

[0016] In one or more embodiments of the present invention, the biological carrier includes a first carrier and an isolation net. The first carrier is disposed inside the isolation net. The interior of the first carrier is a porous structure with a porosity of 60% to 80%. Multiple storage slots are formed on the surface of the first carrier. Multiple protruding posts are fixedly connected to the first carrier. The isolation net is a mesh structure. Multiple turbulence grooves are formed on the surface of the isolation net. A fourth cavity is formed between the first carrier and the isolation net.

[0017] In one or more embodiments of the present invention, a connecting cylinder is fixedly connected to one end of the isolation net, and a second threaded rod is fixedly connected to the end of the first threaded rod away from the third connecting rod. The second threaded rod and the connecting cylinder are threaded together. External threads are provided on the outer wall of the first threaded rod and the outer wall of the connecting cylinder. A nut that matches the external thread is threadedly connected to the first threaded rod.

[0018] Compared with the prior art, the MVR evaporation system for ammonium sulfate wastewater treatment of the present invention has the following advantages:

[0019] 1) As a pretreatment device for the MVR evaporation system, it can adsorb and filter particulate impurities in ammonium sulfate wastewater. Biological treatment can be achieved through the biological purification component. Moreover, the biological purification component does not require frequent manual replacement and cleaning of the filter components, saving labor costs. The products of the biological purification component can also be used in the purification tank to realize the secondary utilization of resources, meet the needs of sustainable development and environmental protection, and ensure the stable operation of the MVR evaporation system.

[0020] 2) The detachable biological purification components can be replaced as a whole or as individual biological carriers. Both replacement methods have their advantages and disadvantages. Operators can choose according to actual needs to meet the construction requirements of the MVR evaporation system.

[0021] 3) A gel network formed by sodium alginate, chitosan and other substances is attached to microorganisms. When the gel network is reused, the microorganisms continuously decompose the organic matter in the gel network, thus achieving sustainable treatment.

[0022] 4) Form a closed-loop system of "wastewater treatment → gas circulation → energy recovery" to improve the integration and energy efficiency of the overall process. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an MVR evaporation system for treating ammonium sulfate wastewater according to one embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of an MVR evaporation system for treating ammonium sulfate wastewater according to one embodiment of the present invention. Figure 2 ;

[0026] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle;

[0027] Figure 4 This is a cross-sectional view of an MVR evaporation system for treating ammonium sulfate wastewater according to an embodiment of the present invention. Figure 1 ;

[0028] Figure 5 for Figure 4 Schematic diagram of the structure at point B;

[0029] Figure 6 for Figure 4 Schematic diagram of the structure at point C;

[0030] Figure 7 for Figure 4 Schematic diagram of the structure at point D;

[0031] Figure 8 This is a cross-sectional view of the first cylinder and the second cylinder in one embodiment of the present invention;

[0032] Figure 9 This is a cross-sectional view of the second cylinder and aeration assembly in one embodiment of the present invention;

[0033] Figure 10 for Figure 9 Schematic diagram of the structure at point E in the middle;

[0034] Figure 11 This is a schematic diagram of the structure of a biological purification component in one embodiment of the present invention;

[0035] Figure 12 for Figure 11 Schematic diagram of the structure at point F;

[0036] Figure 13 This is a cross-sectional view of a biological purification component in one embodiment of the present invention;

[0037] Figure 14 for Figure 13 Schematic diagram of the structure at point G in the middle;

[0038] Figure 15 for Figure 13 Schematic diagram of the structure at point H;

[0039] Figure 16 This is a partial cross-sectional view of a biological carrier in one embodiment of the present invention.

[0040] Explanation of key figure labels:

[0041] 1. First housing; 101. First opening; 2. First cylinder; 201. First through hole; 202. Second opening; 203. Third opening; 3. First cavity; 4. Limiting plate; 5. Ball bearing; 6. Second cylinder; 601. Limiting flange; 602. Mounting hole; 603. Second through hole; 7. Gear ring; 8. First motor; 9. Helical gear; 10. First valve; 11. Drain outlet; 12. Mesh plate; 13. Water outlet pipe; 14. First seal 1401. Cover; 1402. Protrusion; 1403. Second cavity; 15. Aeration assembly; 16. Main air supply pipe; 17. Branch air supply pipe; 18. Nozzle; 1801. Nozzle hole; 19. Anti-clogging ball; 20. First connecting rod; 21. Spring; 22. Second connecting rod; 23. Plug; 24. Pressure sensor; 25. First electromagnetic block; 26. Second electromagnetic block; 27. Circulating air supply assembly; 28. First air delivery pipe; 29. ​​Pump; 30. Second air delivery pipe 31. Air pipe; 32. Third air supply pipe; 33. Demister; 34. Cooler; 35. Fourth air supply pipe; 36. Fifth air supply pipe; 37. Biological purification component; 38. Second sealing cover; 39. Support; 40. Second motor; 40. Third connecting rod; 4001. Wastewater conveying channel; 4002. Third cavity; 4003. Connecting hole; 41. First rotary joint; 4101. Wastewater conveying pipe; 42. Second rotary joint; 4201. 43. Bacterial liquid delivery pipe; 44. First threaded rod; 45. Second threaded rod; 46. Biological carrier; 47. First carrier; 48. Storage tank; 49. Protruding column; 40. Isolation net; 41. Turbulence channel; 42. Fourth cavity; 43. Connecting cylinder; 54. Nut; 55. Connecting frame; 56. Placement plate; 57. L-shaped connecting plate; 58. Hydraulic cylinder; 58. Support leg; 59. Aeration plate; 50. Connecting pipe; 51. Flushing mechanism. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0043] An MVR evaporation system for treating ammonium sulfate wastewater, as described in one embodiment of the present invention, is a device used in the preliminary steps of the MVR evaporation process. It is mainly used to purify ammonium sulfate wastewater to prevent impurities in the wastewater from damaging the equipment required in subsequent steps.

[0044] like Figures 1-4As shown, the MVR evaporation system includes a first shell 1 and a first cylinder 2. The first cylinder 2 is integrally formed inside the first shell 1, and the upper ends of the first shell 1 and the first cylinder 2 are also integrally formed. A first opening 101 is provided at the lower end of the first shell 1, a second opening 202 is provided at the upper end of the first cylinder 2, and a third opening 203 is provided at the lower end of the first cylinder 2. A filter structure (not shown) matching the second opening 202 is installed on the first cylinder 2. The filter structure is a micron-level filter, which retains particulate impurities in the ammonium sulfate wastewater inside the first cylinder 2, while the ammonium sulfate wastewater flows through the filter structure to the outside of the first cylinder 2. That is, it flows into the first cavity 3 formed between the first shell 1 and the first cylinder 2, and finally flows out from the first opening 101.

[0045] The filter structure can be a rigid filter such as a filter screen, zeolite filter, or activated carbon filter. Rigid filter structures can be cleaned through backflushing or similar methods, reducing the need for manual intervention. In other words, this filter structure is primarily self-cleaning through backflushing and similar processes.

[0046] like Figures 1-4 As shown, a first valve 10 matching the third opening 203 is installed on the first cylinder 2. A drain port 11 is fixedly connected to the end of the first valve 10 away from the first cylinder 2, and the drain port 11 extends out from the first opening 101. That is, impurities that have not passed through the filtration structure are retained in the first cylinder 2, and whether they are discharged is controlled by the first valve 10. After the first valve 10 is opened, they are finally discharged through the drain port 11. An orifice position control mechanism matching the first through hole 201 is installed on the outside of the first cylinder 2. The orifice position control mechanism is used to realize the opening, closing and adjustment of the degree of opening and closing of the second opening 202.

[0047] like Figures 4-5As shown, a first sealing cover 14 matching the first opening 101 is installed on the first housing 1. The first sealing cover 14 is threadedly connected to the first housing 1. A protrusion 1401 is provided on the first sealing cover 14, which is located between the first housing 1 and the drain outlet 11, sealing the gap formed between the first housing 1 and the drain outlet 11. A mesh plate 12 is provided at the upper end of the protrusion 1401. A protrusion 1401 matching the mesh plate 12 is opened inside the first sealing cover 14. A second cavity 1402 is opened on the protrusion 1401. A water outlet pipe 13 matching the second cavity 1402 is fixedly connected to the first sealing cover 14. The first cavity 3 is filled with filter media (not shown in the figure). After the ammonium sulfate wastewater is treated by the biological purification component 36, it is discharged into the first cavity 3 through the first through hole 201. It still needs to be filtered a second time by the filter media to avoid impurities from entering the main equipment of MVR evaporation as much as possible. Replacing the packing is also quite simple; just unscrew the first sealing cap 14, and the packing will fall down under gravity. In addition, the first housing 1 is equipped with a feeding port that matches the first cavity 3.

[0048] like Figures 4-8 As shown, the hole position control mechanism includes a second cylinder 6, with a limiting flange 601 fixedly connected to its upper end. A limiting plate 4, matching the limiting flange 601, is fixedly connected to the end of the first housing 1 facing the first cylinder 2, and the limiting plate 4 is located inside the first cavity 3. The second cylinder 6 overlaps the limiting plate 4 via the limiting flange 601. The inner wall of the second cylinder 6 is tightly fitted to the outer wall of the first cylinder 2, allowing them to withstand significant pressure and achieve a seal. A gear ring 7 is fixedly connected to the outer wall of the second cylinder 6, and a first motor 8 is fixedly connected to the first housing 1. The output shaft of the first motor 8 passes through the first housing 1, and a helical gear 9 meshing with the gear ring 7 is fixedly connected to the output shaft of the first motor 8. When the first motor 8 starts, it rotates the helical gear 9, which in turn rotates the gear ring 7, causing the second cylinder 6 to rotatably connect to the outer wall of the first cylinder 2.

[0049] Specifically, the second cylinder 6 has a second through hole 603. The size and shape of the second through hole 603 match those of the first through hole 201. When the second through hole 603 and the first through hole 201 are completely misaligned, the first cylinder 2 is in a closed state, and the ammonium sulfate wastewater will not flow out from the first through hole 201. When the second through hole 603 and the first through hole 201 are not completely misaligned, the ammonium sulfate wastewater passes through the first through hole 201 and the second through hole 603 in sequence, and finally flows into the first cavity 3 and flows out from the first opening 101.

[0050] To reduce the friction between the limiting plate 4 and the limiting stop 601, such as Figure 8As shown, multiple balls 5 are installed on the limiting plate 4. The balls 5 rotate on the limiting plate 4 and are in contact with the second cylinder 6 to improve the smoothness of the rotation of the second cylinder 6.

[0051] The aforementioned equipment can achieve relatively simple filtration of ammonium sulfate wastewater. However, as the first step in an MVR evaporation system for ammonium sulfate wastewater treatment, impurities will still enter the subsequent equipment of the MVR evaporation system, leading to a significant decrease in the heat transfer efficiency, wear, or jamming of the subsequent equipment, which may increase the maintenance costs of the subsequent MVR equipment.

[0052] To avoid the above problems as much as possible, such as Figures 1-4 As shown, a biological purification component 36 is also provided on the first cylinder 2. The biological purification component 36 can pre-degrade some organic pollutants through biological treatment. Compared with chemical pretreatment, such as adding flocculants, which may introduce new impurities, biological treatment converts pollutants into CO2, H2O and harmless biomass through microbial metabolism, without producing chemical sludge. The ammonium sulfate crystallized by subsequent MVR has higher purity.

[0053] For example, 11~ Figure 16 As shown, the biological purification component 36 includes a second sealing cover 37, the size of which matches the size of the second opening 202, and the second sealing cover 37 can seal the second opening 202. A bracket 38 is fixedly connected to the upper end of the second sealing cover 37, and a second motor 39 is fixedly connected to the bracket 38. A third connecting rod 40, matching the output shaft of the second motor 39, is rotatably connected to the second sealing cover 37. When the second motor 39 is started, the output shaft of the second motor 39 can rotate within the first cylinder 2, carrying the third connecting rod 40.

[0054] like Figures 11-16 As shown, the third connecting rod 40 has a wastewater conveying channel 4001 and a third cavity 4002 inside. The lower end of the wastewater conveying channel 4001 is close to the first valve 10 and is open. The third cavity 4002 is a closed cavity outside the wastewater conveying channel 4001. A first rotary joint 41 and a second rotary joint 42 are fixedly connected to the third connecting rod 40. A wastewater conveying pipe 4101 is fixedly connected to the first rotary joint 41, and a bacterial liquid conveying pipe 4201 is fixedly connected to the second rotary joint 42. The first rotary joint 41 communicates with the wastewater conveying channel 4001. A connecting hole 4003 is provided between the second rotary joint 42 and the third cavity 4002 on the third connecting rod 40. That is, after the second rotary joint 42 conveys microorganisms into the second rotary joint 42, the microorganisms are conveyed to the third cavity 4002 through the connecting hole 4003.

[0055] Furthermore, such as Figures 11-16As shown, a first threaded rod 43, matching the third cavity 4002, is fixedly connected to the third connecting rod 40. A biological carrier 45 is installed on the first threaded rod 43. That is, microorganisms in the third cavity 4002 can be transported to the biological carrier 45 through the first threaded rod 43, and the microorganisms can attach to the biological carrier 45. When ammonium sulfate wastewater is transported from the wastewater transport channel 4001 to the first cylinder 2, the microorganisms on the biological carrier 45 react with the ammonium sulfate wastewater, converting the organic matter in the wastewater into CO2, H2O, etc.

[0056] like Figures 13-15 As shown, the outer wall of the third chamber 4002 can be made of a material with good heat exchange performance, while the outer wall of the wastewater conveying channel 4001 can be made of a material with poor thermal conductivity. This design allows the microorganisms in the third chamber 4002 to come into contact with the ammonium sulfate wastewater in the first cylinder 2, exchanging heat and bringing the temperature of the microorganisms in the third chamber 4002 closer to that of the ammonium sulfate wastewater. This avoids temperature differences that could irritate the microorganisms and affect their activity. The third chamber 4002 serves as a transfer station, ensuring that the temperatures of the two chambers are similar, thereby enhancing the role of the microorganisms in purification.

[0057] In the biological purification of ammonium sulfate wastewater, the core microorganisms must possess the characteristics of high salt tolerance and efficient ammonia nitrogen metabolism, while also being able to synergistically degrade any small-molecule organic matter that may coexist in the wastewater. The core microorganisms are salt-tolerant ammonia-oxidizing bacteria, nitrite-oxidizing bacteria, and salt-tolerant heterotrophic bacteria. Through the nitrification process of "ammonia nitrogen → nitrite → nitrate," NH3 volatilization is reduced at the source, thereby reducing exhaust gas pollution and nitrogen loss. Simultaneously, the synergistic degradation of organic matter reduces the load and scaling risk of subsequent MVR systems. Its advantage lies in the fact that the nitrate produced by microbial metabolism has no adverse effect on ammonium sulfate crystallization.

[0058] Under normal circumstances, the microorganisms adhere to the biological carrier 45 through substances such as sodium alginate and chitosan, forming a gel network that provides an attachment framework for the microorganisms. Thus, when ammonium sulfate wastewater is in the biological carrier 45, impurities in the wastewater can be adhered to by the gel network or decomposed by the microorganisms. Particulate matter that is difficult for the microorganisms to decompose can also be adsorbed onto the gel network, achieving the filtration of tiny impurity particles.

[0059] like Figure 16As shown, the biological carrier 45 includes a first carrier 46, on which multiple protrusions 4602 are fixedly connected. A storage groove 4601 is formed on the outer surface of the first carrier 46. The overall microporous structure of the first carrier 46 is not shown in the diagram. This allows the gel network and microorganisms to appear on the outer surface of the first carrier 46 through the porous structure. The storage groove 4601 increases the friction area on the outer surface of the first carrier 46, providing an adhesion surface for the gel network, allowing it to adhere to the first carrier 46. The porosity of the first carrier 46 is controlled at 60%–80%, and the pore size is 50–500 μm. Microorganisms and the gel network can enter the pores to colonize, while the gel network can be ejected from the pores during centrifugation.

[0060] like Figure 16 As shown, an isolation net 47 matching the first carrier 46 is fixedly connected to the outside of the first carrier 46. The first carrier 46 and the isolation net 47 are integrally formed, and a fourth cavity 4702 is formed between the first carrier 46 and the isolation net 47. The gel network and most of the microorganisms reside in the fourth cavity 4702. The isolation net 47 has a mesh structure (not shown in the diagram), which also allows the gel network to adhere. Its main function is that during centrifugation, the isolation net 47 allows most of the gel network to be ejected, while some gel network remains within the isolation net 47. When the external gel network has excessive particulate impurities, centrifugation separates the gel network from the biological carrier 45, and then new gel networks are transported into the biological carrier 45, achieving gel network alternation. This also reduces the loss of microorganisms and the wear and tear of the gel network, which helps reduce the treatment cost of ammonium sulfate wastewater.

[0061] like Figure 16 As shown, the outer surface of the isolation net 47 is provided with a turbulence groove 4701. The main purpose of the turbulence groove 4701 is to agitate the ammonium sulfate wastewater during rotation, so that the ammonium sulfate wastewater can fully contact the gel network.

[0062] like Figures 12-16 As shown, one end of the isolation net 47 is fixedly connected to a connecting cylinder 48, and the end of the first threaded rod 43 away from the third connecting rod 40 is fixedly connected to a second threaded rod 44. The second threaded rod 44 and the connecting cylinder 48 are threadedly connected. In other words, the biological carrier 45 is detachably installed on the second threaded rod 44. When the biological carrier 45 ages, only one biological carrier 45 can be replaced, instead of replacing all of them, which greatly saves the operating cost of the equipment. The outer walls of the first threaded rod 43 and the connecting cylinder 48 are both provided with external threads, and a nut 49 that matches the external thread is threadedly connected to the first threaded rod 43. The nut 49 can strengthen the stability of the threaded connection between the first threaded rod 43 and the connecting cylinder 48.

[0063] In the above scheme, by attaching the gel network and microorganisms to the biological carrier 45, and stirring the biological carrier 45 in the ammonium sulfate wastewater with the support 38, the gel network and microorganisms are used to treat the organic and inorganic matter in the ammonium sulfate wastewater to purify the ammonium sulfate wastewater, reduce particulate impurities in the ammonium sulfate wastewater, and minimize the blockage of the MVR evaporation equipment by particulate impurities in the subsequent MVR evaporation process. At the same time, it can also improve the efficiency of obtaining ammonium sulfate crystals by MVR evaporation.

[0064] In the above scheme, during the separation of the gel network, the first through hole 201 needs to be completely blocked by the second cylinder 6, allowing the support 38 to output at high speed. This causes the biological carrier 45 to rotate at high speed within the first cylinder 2, and part of the gel network is thrown out by centrifugation. After separation, the first valve 10 needs to be opened, and the separated impurities are discharged through the drain port 11. The discharged impurities still contain microorganisms and have a certain adsorption effect. These impurities can be added to the ammonium sulfate wastewater treatment tank to achieve secondary utilization of waste, reduce the treatment cost of ammonium sulfate wastewater, and improve the treatment effect of ammonium sulfate wastewater in the treatment tank stage.

[0065] To further improve the treatment effect of ammonium sulfate wastewater in the first cylinder 2, such as Figures 1-10 As shown, the MVR evaporation system also includes an aeration assembly 15 and a circulating air supply assembly 27 for supplying gas to the aeration assembly 15. The aeration assembly 15 includes a main air supply pipe 16. The second cylinder 6 has multiple mounting holes 602 that match the first through hole 201. The mounting holes 602 are located on one side of the second through hole 603, and the mounting holes 602 and the second through hole 603 can be aligned with the second opening 202, respectively. Several branch air supply pipes 17 that match the mounting holes 602 are fixedly connected to the main air supply pipe 16, and nozzles 18 that match the mounting holes 602 are fixedly connected to the branch air supply pipes 17, with the nozzles 18 slidably connected in the mounting holes 602.

[0066] Specifically, such as Figures 9-10As shown, the nozzle 18 has multiple evenly distributed nozzle holes 1801. An anti-clogging ball 19 is slidably connected inside the nozzle 18, completely blocking the branch air supply pipe 17. A first connecting rod 20 is fixedly connected to the anti-clogging ball 19, with one end of the first connecting rod 20 extending through the middle of the nozzle 18. A spring 21 is sleeved on the first connecting rod 20, located between the anti-clogging ball 19 and the nozzle 18. That is, when the branch air supply pipe 17 is not venting, the anti-clogging ball 19 blocks the branch air supply pipe 17. When the branch air supply pipe 17 vents, the spring 21 deforms due to pressure, causing the anti-clogging ball 19 to move away from the branch air supply pipe 17, allowing the gas inside the branch air supply pipe 17 to be discharged smoothly. This design minimizes the risk of impurities or ammonium sulfate wastewater entering the branch gas supply pipe 17 from the nozzle 1801 under high pressure, thus preventing pipe blockage and corrosion caused by the entry of ammonium sulfate wastewater into the branch gas supply pipe 17.

[0067] Furthermore, a second connecting rod 22 is fixedly connected to the first connecting rod 20. The second connecting rod 22 is distributed on each nozzle 1801. A plug 23 matching the nozzle 1801 is installed on the second connecting rod 22. When the anti-clogging ball 19 blocks the air supply pipe 17, the plug 23 can also block the nozzle 1801, preventing ammonium sulfate wastewater from entering the nozzle 18 from the nozzle 1801 and extending the service life of the nozzle 18.

[0068] like Figure 10 As shown, a pressure sensor 24, matching the anti-clogging ball 19, is fixedly connected to the inner wall of the air supply pipe 17. A first electromagnetic block 25 is fixedly connected to the bottom wall of the mounting hole 602, and a second electromagnetic block 26 is fixedly connected to the nozzle 18. When the anti-clogging ball 19 is disengaged from the pressure sensor 24, the pressure sensor 24 sends signals to the first electromagnetic block 25 and the second electromagnetic block 26, causing them to repel each other. The nozzle 18 can then move towards the first through hole 201 and partially reside within it. The outer wall of the nozzle 18 is provided with sealing rubber, thus the contact surface between the nozzle 18 and the first through hole 201 is also sealed. This arrangement reduces gas leakage, allowing the gas to fully fill the first cylinder 2. The microorganisms in the first cylinder 2 come into full contact with oxygen to maintain their activity, enabling them to fully treat the ammonium sulfate wastewater within the first cylinder 2.

[0069] like Figures 1-2As shown, the circulating air supply assembly 27 includes a pump 29. The inlet of the pump 29 is connected to a first air supply pipe 28, and the other end of the first air supply pipe 28 is fixedly connected to the top of the first cylinder 2 to achieve gas recovery. The outlet of the pump 29 is connected to a second air supply pipe 30, and the other end of the second air supply pipe 30 is fixedly connected to a demister 32. One end of the demister 32 is connected to a cooler 33, and the outlet of the cooler 33 is fixedly connected to a fourth air supply pipe 34, which is connected to the main air supply pipe 16. That is, the exhaust gas can be circulated, and during the circulation process, the exhaust gas is treated by the demister 32 and the cooler 33, which can avoid water accumulation and corrosion in the pipes and partially alleviate the exhaust gas treatment problem. Of course, the demister 32 and the cooler 33 can also be installed on the first air supply pipe 28.

[0070] like Figure 2 As shown, a third air supply pipe 31 is provided on the second air supply pipe 30, and a fifth air supply pipe 35 is provided on the fourth air supply pipe 34. Valves are provided on the second air supply pipe 30, the third air supply pipe 31, the fourth air supply pipe 34, and the fifth air supply pipe 35, which control the amount of air entering and the amount of exhaust gas emitted.

[0071] By circulating the waste gas within the first cylinder 2, the recirculated gas contains trace amounts of ammonia. After recirculation, this ammonia can be further degraded into nitrates or nitrogen by microorganisms within the aeration system, avoiding odor complaints or environmental exceedance risks caused by direct discharge. This eliminates the need for additional ammonia waste gas treatment equipment, simplifying the waste gas treatment process. The CO2 in the recirculated gas can be utilized as a carbon source by heterotrophic microorganisms within the aeration system, reducing the amount of CO2 discharged and indirectly lowering the process's carbon footprint. Combined with the MVR evaporation system, the gas recirculation aligns with the "recycling" logic of MVR, forming a closed-loop system of "wastewater treatment → gas circulation → energy recovery," improving the overall process integration and energy efficiency.

[0072] In short, gas recycling reduces operating costs and resource consumption by recovering oxygen, ammonia, and CO2 from the gas, simplifies environmental protection treatment and stabilizes process operation by reducing exhaust emissions, and ultimately synergizes with the energy-saving concept of the MVR system to improve the overall economic efficiency and environmental friendliness of the process.

[0073] like Figure 4 As shown, an aeration plate 55 is also provided at the bottom of the first cylinder 2. A connecting pipe 56 matching the main air supply pipe 16 is provided on the aeration plate 55. When the main air supply pipe 16 outputs gas, gas is supplied to the aeration plate 55 through the connecting pipe 56, and aeration is carried out from the lower end of the ammonium sulfate wastewater upward.

[0074] like Figure 4As shown, the first cylinder 2 is also equipped with a flushing mechanism 57. The flushing mechanism 57 flushes the biological purification component 36 and the inner wall of the first cylinder 2 by high-pressure water spraying. The impurities flushed are discharged through the drain port 11. The biological purification component 36 and the inner wall of the first cylinder 2 can be self-cleaned without manual intervention.

[0075] like Figure 1 As shown, the aforementioned device is mounted on a placement plate 51 via support legs 54. An L-connecting plate 52 is fixedly connected to one side of the placement plate 51, and a hydraulic cylinder 53 is fixedly connected to the L-connecting plate 52. A connecting frame 50 is fixedly connected to the biological purification component 36. The output end of the hydraulic cylinder 53 is fixedly connected to the connecting frame 50 on the biological purification component 36. That is, the biological purification component 36 can be removed from the first cylinder 2 via the hydraulic cylinder 53 to replace the biological carrier 45. With this configuration, either the biological purification component 36 or the biological carrier 45 can be replaced directly, and a replacement mode can be selected according to actual usage requirements.

[0076] In operation, this invention first transports ammonium sulfate wastewater to the first cylinder 2 via the third connecting rod 40. The biological purification component 36 then treats the wastewater, adsorbing fine particles and decomposing organic matter. During this process, the aeration component 15 and the circulating air supply component 27 work together to circulate aeration within the first cylinder 2, ensuring the activity of microorganisms and sufficient contact between the ammonium sulfate wastewater and the biological purification component 36. After the biological purification component 36 completes its treatment, the first motor 8, helical gear 9, and gear ring 7 drive the second cylinder 6 to rotate, aligning the first through-hole 201 and the second through-hole 603. The ammonium sulfate wastewater then passes through the first through-hole 201 and the second through-hole 603 and is discharged from the device, entering the subsequent MVR evaporation equipment. Impurities located within the first cylinder 2 are directly discharged through the drain port 11. These impurities can be reused, saving energy and protecting the environment, thus reducing the cost of treating ammonium sulfate wastewater using the MVR system.

[0077] This invention enables the treatment of ammonium sulfate wastewater in the early stages of MVR evaporation equipment, improving the efficiency of removing minute impurities and organic matter. It also reduces manual intervention, eliminating the need for frequent filter media replacement and lowering equipment maintenance costs. Furthermore, the byproducts of ammonium sulfate wastewater treatment can be reused, meeting the requirements of sustainable development and environmental protection, and contributing to improved operational efficiency and stability of the MVR evaporation equipment.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A MVR evaporation system for ammonium sulfate wastewater treatment, characterized in that, include: The first housing has an integrally formed first cylinder inside the first housing. The first cylinder has a second opening and a third opening. The side wall of the first cylinder has a plurality of evenly distributed first through holes. The first cylinder is equipped with a filter structure that matches the first through holes. The lower end of the first housing has a first opening, and a first cavity is formed between the first housing and the first cylinder. A biological purification assembly that matches the first cylinder includes a second sealing cover, a bracket fixedly connected to the upper end of the second sealing cover, a second motor fixedly connected to the bracket, and a third connecting rod fixedly connected to the output shaft of the second motor. The third connecting rod has a wastewater conveying channel and a third cavity inside. A first rotary joint and a second rotary joint that match the wastewater conveying channel and the third cavity are fixedly connected to the third connecting rod. A wastewater conveying pipe and a bacterial liquid conveying pipe are respectively installed on the first rotary joint and the second rotary joint. A first threaded rod that matches the third cavity is installed on the third connecting rod. A biological carrier is detachably installed on the first threaded rod. Microorganisms for purifying ammonium sulfate wastewater are attached to the biological carrier. A hole position control mechanism matching the first through hole is fixedly connected to the outer wall of the first cylinder. The hole position control mechanism is used to realize the opening, closing and opening degree adjustment of the first through hole. The hole position control mechanism includes a second cylinder, on which a second through hole is provided that matches the first through hole; The upper end of the second cylinder is fixedly connected to a limiting flange, and the upper end of the first shell is fixedly connected to a limiting plate that matches the limiting flange. The second cylinder is mounted on the limiting plate through the limiting flange, and a plurality of rotatable balls are fixedly connected to the limiting plate. A gear ring is fixedly connected to the outer wall of the second cylinder, a first motor is installed on the first housing, the output shaft of the first motor passes through the first housing, and a helical gear matching the gear ring is fixedly connected to the output shaft of the first motor. The second cylinder has an installation hole located on one side of the second through hole. An aeration assembly matching the installation hole is installed on the second cylinder. The aeration assembly includes a main air supply pipe and a branch air supply pipe matching the installation hole is fixedly connected to the main air supply pipe. A nozzle is installed on the branch air supply pipe. A first electromagnetic block is fixedly connected to the bottom wall of the mounting hole, and a second electromagnetic block matching the first electromagnetic block is fixedly connected to the nozzle. The first electromagnetic block and the second electromagnetic block work together to control the nozzle to slide in the mounting hole.

2. The MVR evaporation system for ammonium sulfate wastewater treatment according to claim 1, characterized in that, A first valve matching the third opening is fixedly connected to the first cylinder. A drain port is fixedly connected to the end of the first valve away from the first cylinder. The drain port extends out from the first opening. The first housing is equipped with a first sealing cover that matches the first opening. The first sealing cover is threadedly connected to the first housing. The first sealing cover is provided with a protrusion located between the first housing and the drain outlet, and seals the gap formed between the first housing and the drain outlet. A mesh plate is provided at the upper end of the protrusion, and a second cavity is opened on the protrusion. A water outlet pipe that matches the second cavity is fixedly connected to the first sealing cover.

3. The MVR evaporation system for ammonium sulfate wastewater treatment according to claim 2, characterized in that, The first cavity is filled with filter media, which can be discharged from the gap between the first housing and the drain port. The first housing is provided with a feed port that matches the first cavity.

4. The MVR evaporation system for ammonium sulfate wastewater treatment according to claim 1, characterized in that, The nozzle has multiple spray holes, and an anti-clogging ball is movably connected inside the nozzle. The outer diameter of the anti-clogging ball is larger than the inner diameter of the branch air supply pipe. A first connecting rod is fixedly connected to the anti-clogging ball. The first connecting rod passes through the middle of the nozzle and is used to limit the movement direction of the anti-clogging ball inside the nozzle. A spring is sleeved on the first connecting rod and the spring is located between the anti-clogging ball and the nozzle. One end of the first connecting rod protrudes from the outer wall of the nozzle, and a second connecting rod is fixedly connected to the end of the first connecting rod protruding from the outer wall of the nozzle. A plug matching the nozzle orifice is fixedly connected to the second connecting rod.

5. The MVR evaporation system for ammonium sulfate wastewater treatment according to claim 4, characterized in that, It also includes a circulating air supply component for supplying air to the aeration components. The circulating air supply component includes a pump, the air inlet of which is fixedly connected to a first air supply pipe, the air outlet of which is fixedly connected to a second air supply pipe, the end of the second air supply pipe away from the pump being fixedly connected to a gas treatment component, and the end of the gas treatment component away from the second air supply pipe being fixedly connected to a fourth air supply pipe, which is connected to the main air supply pipe.

6. The MVR evaporation system for ammonium sulfate wastewater treatment according to claim 5, characterized in that, A third gas supply pipe is fixedly connected to the second gas supply pipe, and a fifth gas supply pipe is fixedly connected to the fourth gas supply pipe. A second valve for controlling the passage is provided on the second and third gas supply pipes, as well as the fourth and fifth gas supply pipes.

7. The MVR evaporation system for ammonium sulfate wastewater treatment according to claim 1, characterized in that, The biological carrier includes a first carrier and an isolation net. The first carrier is disposed inside the isolation net. The interior of the first carrier has a porous structure with a porosity of 60% to 80%. Multiple storage slots are formed on the surface of the first carrier. Multiple protrusions are fixedly connected to the first carrier. The isolation net has a mesh structure, and multiple turbulence grooves are formed on the surface of the isolation net, forming a fourth cavity between the first carrier and the isolation net.

8. The MVR evaporation system for ammonium sulfate wastewater treatment according to claim 7, characterized in that, One end of the isolation net is fixedly connected to a connecting cylinder, and the end of the first threaded rod away from the third connecting rod is fixedly connected to a second threaded rod. The second threaded rod and the connecting cylinder are threaded together. The outer wall of the first threaded rod and the outer wall of the connecting cylinder are both provided with external threads. A nut that matches the external threads is threaded onto the first threaded rod.

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