MVR (mechanical vapor recompression) evaporative crystallization equipment for zero-discharge sewage treatment plant

Abstract

The invention discloses MVR (mechanical vapor recompression) evaporative crystallization equipment of a zero-discharge sewage treatment plant, and belongs to the technical field of sewage treatment devices.The MVR evaporative crystallization equipment comprises a sewage flocculation separation mechanism, the sewage flocculation separation mechanism comprises a first box, and the periphery of the bottom end of the first box is connected with a bottom plate through compression springs; a first motor is installed at the center of the bottom of the first box body, an output shaft of the first motor is connected to a bidirectional telescopic rod arranged in the first box body, and first blades are installed at the telescopic end of the bidirectional telescopic rod; the two sides of the bottom end of the first box body are connected with the movable blocks through swing rods. The invention can solve the problems that suspended particulate matters and a flocculating agent cannot be fully fused, and when large-particle flocculates are formed, an independent structure is often needed for cleaning and discharging, so that the production cost is increased, and peculiar smell generated in the sewage treatment process cannot be effectively solved, so that corresponding environmental pollution is generated.

Description

Technical Field

[0001] This invention belongs to the technical field of wastewater treatment devices, specifically relating to MVR evaporation crystallization equipment for zero-discharge wastewater treatment plants. Background Technology

[0002] MVR stands for Mechanical Steam Recompression. MVR is an energy-saving technology that reuses the energy of the secondary steam it generates, thereby reducing the need for external energy sources. The evaporator works by compressing low-temperature steam through a compressor, increasing its temperature, pressure, and enthalpy, before it enters a heat exchanger for condensation, fully utilizing the latent heat of the steam. Except for startup, no live steam is required during the entire evaporation process.

[0003] The specific working process is as follows: The solution circulates within the heating tubes in a falling film evaporator via a material circulation pump. Initial steam is supplied to the outside of the tubes with fresh steam, heating the solution to boiling and generating secondary steam. This secondary steam is drawn in by a turbocharger fan, pressurized, and its temperature increases, then it enters the heating chamber for continuous evaporation. After normal startup, the turbo compressor draws in the secondary steam, pressurizes it, and converts it into heating steam, thus continuously circulating and evaporating the solution.

[0004] During the evaporation and crystallization process of wastewater, pretreatment of larger suspended particles and odors is generally required. However, during the treatment of suspended particles, the suspended particles and flocculants cannot be fully integrated, and when large flocs are formed, they often need to be swept and discharged independently, which reduces work efficiency. The odors generated during the wastewater treatment process cannot be effectively resolved, which in turn leads to corresponding environmental pollution problems. Summary of the Invention

[0005] The purpose of this invention is to provide an MVR evaporation crystallization device for zero-discharge wastewater treatment plants to solve the technical problems that, in the process of treating suspended particulate matter, suspended particulate matter and flocculant cannot be fully integrated, and when large flocs are formed, they often need to be cleaned and discharged by a separate structure, which reduces work efficiency. Furthermore, the odor generated during the wastewater treatment process cannot be effectively resolved, which in turn leads to corresponding environmental pollution problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The MVR evaporation crystallization equipment for zero-discharge wastewater treatment plants includes: A wastewater flocculation separation mechanism includes a first box, the bottom of which is connected to a bottom plate by compression springs on all four sides. A first motor is installed at the center of the bottom of the first box, and the output shaft of the first motor is connected to a bidirectional telescopic rod placed inside the first box. A first blade is installed on the telescopic end of the bidirectional telescopic rod. The bottom sides of the first housing and the movable block are connected by swing rods. Limiting blocks are installed on both sides of the movable block along the length of the bottom plate. One end of the movable block passes through the battery box and extends to the tapered insert at the gap between the battery packs. The battery packs are electrically connected to a first motor and an electric push rod. The lifting rod on the electric push rod extends to the filter plate on the inner wall of the first housing. One end of the filter plate is connected to the telescopic end of the bidirectional telescopic rod through a bearing.

[0007] Furthermore, both sides of the swing rod are mounted on the first housing and the movable block by means of rotational connection. The outer edge of the telescopic end of the bidirectional telescopic rod is provided with an annular groove for connection with the bearing, and the outer wall of the bearing is connected to the filter plate by means of limiting and fixing. The filter plate is provided with filter holes that are adapted to it.

[0008] Furthermore, the top end of the bidirectional telescopic rod is connected to the first bevel gear, and the outer wall of the first bevel gear meshes with a second bevel gear fixed on the first rotating shaft. One end of the first rotating shaft is connected to a first rotating tooth, and the outer wall of the first rotating tooth meshes with a second rotating tooth fixed on the second rotating shaft. The first bevel gear, the second bevel gear, the first rotating tooth, and the second rotating tooth are all placed in the cover, and one end of the cover is fixed to the inner wall of the first box by a crossbeam.

[0009] Furthermore, one end of each of the first and second rotating shafts is connected to a movable shaft via a conveyor belt. The outer wall of the movable shaft is provided with a ring array of baffles. One end of each baffle is connected to a collection box via an opening on the first housing. The collection box is detachably connected to the outer wall of the first housing.

[0010] Furthermore, it also includes an odor treatment mechanism, which includes a second housing. The second housing and the first housing are connected by an air pump. A second motor is installed at the bottom of the second housing. The output shaft of the second motor extends to a second blade. A photocatalytic component is placed inside the second housing directly above the second blade.

[0011] Furthermore, the photocatalytic component includes a spiral air guide plate forming a swirling air duct. Both the spiral air guide plate and the swirling air duct are coated with a photocatalyst, and an ultraviolet irradiation lamp is provided at the center of the swirling air duct. The photocatalytic component is connected to the contact part of the side wall of the second housing by a snap-fit ​​limiting and fixing method.

[0012] Furthermore, a sound-absorbing component is provided between the photocatalytic component and the top of the inner wall of the second chamber. The sound-absorbing component is a set of sound-absorbing plates arranged directly on the side wall of the second chamber. The end of the sound-absorbing plate facing the air inlet of the photocatalytic component is arc-shaped, and a sound-absorbing cavity is formed between the sound-absorbing plates. Air outlets connected to the sound-absorbing cavity are provided on both sides of the outer wall of the second chamber.

[0013] Furthermore, a preheater is connected to the bottom of the first housing via a water pump, and the conduit on the preheater extends to the evaporator. A closed loop is formed between the air outlet at one end of the evaporator and the compressor.

[0014] Furthermore, the outer edge of the output shaft of the first motor is provided with an movable opening that connects to the first housing. The movable opening is fitted with a sealing gasket by adhesive fixation. The vertical central axis of the output shaft of the first motor and the vertical central axis of the bidirectional telescopic rod are both kept on the same axis. The top of the first housing is provided with a sewage inlet and a flocculant inlet.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In this invention, the flocculant promotes the aggregation of tiny particles in water into large flocs, thereby achieving efficient solid-liquid separation. Furthermore, when the weight of the wastewater and flocculant reaches a certain standard, they move downwards under the influence of gravitational potential energy. Utilizing the rotational connection of the swing rod, the movable blocks at both ends can move horizontally outwards. During this movement, the movable blocks can separate from the battery pack through the conical insert, allowing the battery pack to supply power to the first motor and electric push rod. No manual operation is required; the electronic components can be automatically activated. During the rotation of the first motor, the first blade can be driven to rotate, causing the flocculant and wastewater to separate. The water is effectively mixed, and the electric push rod can drive the telescopic end of the bidirectional telescopic rod to move up and down, thereby pushing the large flocs to the surface of the sewage. Moreover, during the pushing process, the electric push rod can drive the first blade to rotate at different depths, further enabling the flocculant and sewage to fully mix. Under the mechanical transmission, the reverse meshing of gears and the conveyor belt drive can cause the baffles on the two movable shafts at both ends to rotate in opposite directions. Under the action of water flow, the large flocs are pushed into the collection box, which can effectively remove and collect fine particulate matter in sewage, ensuring the stability of the device operation.

[0016] In this invention, the compression spring on the first housing ensures that the first housing can move freely up and down. During the up and down movement of the first housing, the power can be converted and the moving block can be moved. When the sewage and flocculant reach a certain volume, the conical rod will separate from the battery pack, and the battery pack can then supply power to the driver normally. In addition, the power drive components are set in two sets, which can play a good backup role and prevent the entire device from failing to function properly if one electrical component is damaged, thus effectively improving the practicality of the device.

[0017] In this invention, ultraviolet light is used to excite a photocatalyst, generating strong oxidizing free radicals that decompose odor molecules, thereby effectively deodorizing them. At the same time, the spiral guide vanes in the vortex duct can effectively expand the contact area and increase the contact time between the gas and the photocatalyst, allowing odor molecules to effectively contact the photocatalyst. In addition, the noise generated when the second blade rotates can be absorbed by the sound-absorbing material. Moreover, when the airflow passes through the annular sound-absorbing plate, it can ensure the smooth passage of airflow while reducing wind resistance, thus achieving a good noise reduction effect and providing a comfortable working environment.

[0018] In this invention, the temperature and pressure of secondary steam are increased by compressing it, and it is reused as a heat source to achieve the evaporation and crystallization of materials, thus realizing the reuse of resources and benefiting the environment. Attached Figure Description

[0019] 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 of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to the present invention. Figure 2 ; Figure 3 This is a front view of the MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to the present invention; Figure 4 This is a schematic diagram of the structure of a first box body according to the present invention; Figure 5 This is a front view of the interior of the first housing according to another aspect of the present invention; Figure 6This is a schematic diagram showing the connection between the filter plate and the lifting rod in the second embodiment of the present invention; Figure 7 This is a schematic diagram showing the connection between the conical insert and the battery pack of the present invention; Figure 8 This is a schematic diagram of the meshing transmission of the first bevel gear and the second bevel gear of the present invention; Figure 9 This is a schematic diagram of the odor treatment mechanism of the present invention.

[0021] Reference numerals: 1. Wastewater flocculation separation mechanism; 2. First housing; 3. Compression spring; 4. First motor; 5. Bidirectional telescopic rod; 6. First blade; 7. Movable block; 8. Swinging rod; 9. Limiting block; 10. Battery box; 11. Battery pack; 12. Conical insert rod; 13. Electric push rod; 14. Lifting rod; 15. Filter plate; 16. Bearing; 17. Telescopic end; 18. Filter hole; 19. First bevel gear; 20. First rotating shaft; 21. Second bevel gear; 22. First rotating gear; 23. Second... 24. Rotating shaft; 25. Second rotating gear; 26. Cover; 27. Conveyor belt; 28. Movable shaft; 29. ​​Baffle plate; 30. Collection box; 31. Odor treatment mechanism; 32. Second housing; 33. Air pump; 34. Second motor; 35. Second blade; 36. Photocatalytic component; 37. Spiral air guide plate; 38. Ultraviolet lamp; 39. Contact part; 40. Silencing component; 41. Silencing plate; 42. Water pump; 43. Preheater; 44. Evaporator; 45. Compressor; 46. Gear plate; 47. Third rotating gear. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0023] Reference manual attached Figure 1 Appendix Figure 2 and attached Figure 4 As shown, the MVR evaporation crystallization equipment of the zero-discharge wastewater treatment plant includes: a wastewater flocculation separation mechanism 1, which includes a first box 2. The bottom of the first box 2 is connected to the bottom plate by compression springs 3 around its perimeter. A first motor 4 is installed at the center of the bottom of the first box 2. The output shaft of the first motor 4 is connected to a bidirectional telescopic rod 5 placed inside the first box 2. A first blade 6 is installed on the telescopic end 17 of the bidirectional telescopic rod 5. The bottom sides of the first housing 2 and the movable block 7 are connected by swing rods 8. Limiting blocks 9 are installed on both sides of the movable block 7 along the length of the bottom plate. One end of the movable block 7 passes through the battery box 10 and extends to the tapered insert 12 at the gap between the battery packs 11. The battery pack 11 is electrically connected to the first motor 4 and the electric push rod 13. The lifting rod 14 on the electric push rod 13 extends to the filter plate 15 on the inner wall of the first housing 2. One end of the filter plate 15 is connected to the telescopic end 17 on the bidirectional telescopic rod 5 through the bearing 16.

[0024] The power drive assembly includes a compression spring 3 on the first housing 2, which ensures that the first housing 2 can move freely up and down. During the up and down movement of the first housing 2, the power can be converted and the moving block 7 can be moved. When the sewage and flocculant reach a certain volume, the conical rod 12 will separate from the battery pack 11, so that the battery pack 11 can supply power to the driver normally. In addition, the power drive assembly is set in two sets, which can play a good backup role and prevent the entire device from failing to work properly if one electrical component is damaged, thus effectively improving the practicality of the device.

[0025] Specifically, if the battery pack 11, battery box 10, and swing rod 8 are directly set at a vertical angle, although the tapered rod 12 can be pulled out and separated from the gap of the battery pack 11 during the downward movement of the first box 2, the battery pack 11 needs to be set at a certain height inside the battery box 10, and the battery pack 11 needs to be clamped to a certain degree by a corresponding limiting clamping mechanism to ensure effective separation or insertion between the tapered rod 12 and the battery pack 11. However, an additional limiting clamping mechanism is required. The technical solution of this invention replaces the above-mentioned limiting clamping mechanism by directly adding the swing rod 8. With the movable block 7, it can prevent the movable block 7 from deviating in position when it moves on the side wall of the limiting block 9. The transmission component design is simple and reasonable, which facilitates subsequent maintenance work, and the transmission is stable, which helps to improve the reliability of the device.

[0026] A wastewater flocculation separation mechanism 1 is set up. The flocculant causes tiny particles in the water to aggregate into large flocs, thereby achieving efficient solid-liquid separation. When the weight of the wastewater and flocculant reaches a certain standard, they move downwards under the action of gravitational potential energy. With the help of the rotational connection of the swing rod 8, the movable blocks 7 at both ends can move horizontally outwards. During the movement, the movable blocks 7 can separate from the battery pack 11 through the gap of the conical insert rod 12, thereby allowing the battery pack 11 to supply power to the first motor 4 and the electric push rod 13 normally. Without manual operation, the electronic components can be automatically activated. During the rotation of the first motor 4, it can drive the rotation of the first blade 6, so that the flocculant... The flocculant effectively blends with the wastewater, and the electric push rod 13 can drive the telescopic end 17 on the bidirectional telescopic rod 5 to move up and down, thereby pushing the large flocculants to the surface of the wastewater. During the pushing process, the electric push rod 13 can drive the first blade 6 to rotate at different depths, further enabling the flocculant and wastewater to fully blend. Under the mechanical transmission, the reverse meshing of gears and the transmission of the conveyor belt 26 can cause the baffles 28 on the two movable shafts 27 to rotate in opposite directions. Under the action of water flow, the large flocculants are pushed into the collection box 29, which can effectively remove and collect fine particles in the wastewater, ensuring the stability of the device operation. Example 2

[0027] refer to Figure 1 , Figure 4 , Figure 5 , Figure 7 and Figure 8 Both sides of the swing rod 8 are mounted on the first housing 2 and the movable block 7 by means of rotational connection. The outer edge of the telescopic end 17 of the bidirectional telescopic rod 5 is provided with an annular groove that is connected to the bearing 16. The outer wall of the bearing 16 is connected to the filter plate 15 by means of limiting and fixing. The filter plate 15 is provided with filter holes 18 that are adapted to it.

[0028] The top end of the bidirectional telescopic rod 5 is connected to the first bevel gear 19. The outer wall of the first bevel gear 19 meshes with the second bevel gear 21 fixed on the first rotating shaft 20. One end of the first rotating shaft 20 is connected to the first rotating tooth 22. The outer wall of the first rotating tooth 22 meshes with the second rotating tooth 24 fixed on the second rotating shaft 23. The first bevel gear 19, the second bevel gear 21, the first rotating tooth 22 and the second rotating tooth 24 are all placed in the cover 25. One end of the cover 25 is fixed to the inner wall of the first box 2 by a crossbeam.

[0029] The aforementioned bevel gear meshing transmission can effectively achieve power reversal adjustment, and through the reverse meshing transmission of the rotating teeth, it can drive the baffles 28 on the movable shafts 27 at both ends to rotate in the opposite direction, thereby achieving reverse rotation cleaning work.

[0030] Specifically, the telescopic end 17 of the bidirectional telescopic rod 5 is provided with a first blade 6. During the up-and-down movement of the telescopic end 17, it can not only move normally, but also drive the first blade 6 to rotate at different depths, thereby allowing the flocculant and sewage to fully mix. The filter holes 18 on the filter plate 15 have a good solid-liquid separation effect between the flocculent and the water. During the lifting and lowering adjustment of the filter plate 15 by the electric push rod 13, since the filter plate 15 and the telescopic end 17 are provided with a bearing 16, and the bearing 16 is set in the annular groove recessed inward on the telescopic end 17, the filter plate 15 can ensure the synchronous lifting and lowering of the telescopic end 17, and also ensure the normal rotation of the telescopic end 17. The protrusions at both ends of the telescopic end 17 are provided with concave grooves on both sides of the inner wall of the bidirectional telescopic rod 5. After the first motor 4 is started, it can ensure the normal rotation of the telescopic end 17, and also allow it to move freely up and down. The above-mentioned protrusions and concave grooves are conventional technical means for those skilled in the art to ensure free movement of rotation and lifting, so they will not be described in detail here.

[0031] When the filter plate 15 conveys the flocs to the sewage surface, the flocs are pushed into the collection box 29 by the reverse rotation of the baffles 28 on the mechanical transmission mechanism. This can be adapted to application scenarios where there are not many flocs underwater, and can quickly remove the flocs. Example 3

[0032] refer to Figure 1 , Figure 4 and Figure 6 When there are many particles in the sewage, the cleaning mechanism in Example 1 often cannot perform the cleaning work quickly, and there may be accumulation and compression, which will lead to blockage at the discharge port of the first box 2 and affect the normal discharge of flocs. By setting the filter plate 15 into a triangular shape, the flocs can be pushed to the height of the discharge port by the lifting rod 14 on the electric push rod 13. During the upward movement of the electric push rod 13, the gear plate 45 connected to the lifting rod 14 meshes with the third rotating tooth 46 for transmission.

[0033] In addition, the top of the gear plate 45 is provided with an movable opening that connects to the inner wall of the first housing 2, thereby ensuring the normal up and down movement of the gear plate 45. Moreover, during the meshing transmission between the gear plate 45 and the third rotating tooth 46, the baffle 28 connected to the third rotating tooth 46 can rotate towards the discharge port. In turn, under the action of gravity, the flocs can be removed into the collection box 29 in conjunction with the rotation of the baffle 28, thereby achieving a better removal effect.

[0034] One end of the first rotating shaft 20 and the second rotating shaft 23 are connected to a movable shaft 27 via a conveyor belt 26. The outer wall of the movable shaft 27 is provided with a ring array of baffles 28. One end of the baffles 28 is connected to a collection box 29 through an opening on the first housing 2. The collection box 29 is detachably connected to the outer wall of the first housing 2. Example 4

[0035] refer to Figure 1 , Figure 3 and Figure 9 The MVR evaporation crystallization equipment of the zero-discharge wastewater treatment plant also includes an odor treatment mechanism 30. The odor treatment mechanism 30 includes a second box 31. The second box 31 and the first box 2 are connected by an air pump 32. A second motor 33 is installed at the bottom of the second box 31. The output shaft of the second motor 33 extends to the second blade 34. A photocatalytic component 35 is placed inside the second box 31 directly above the second blade 34.

[0036] The odor treatment mechanism 30 utilizes ultraviolet light to excite a photocatalyst, generating strong oxidizing free radicals that decompose odor molecules, thus effectively deodorizing. Simultaneously, the spiral guide vanes 36 in the vortex duct effectively expand the contact area and increase the contact time between the gas and the photocatalyst, allowing odor molecules to effectively contact the photocatalyst. Furthermore, the noise generated by the rotation of the second blade 34 can be absorbed by the sound-absorbing material. Moreover, when the airflow passes through the annular sound-absorbing plate 40, it reduces wind resistance and ensures smooth airflow, thereby achieving a good noise reduction effect and providing a comfortable working environment.

[0037] The photocatalytic component 35 includes a spiral air guide plate 36 forming a swirling air duct. Both the spiral air guide plate 36 and the swirling air duct are coated with photocatalyst, and an ultraviolet irradiation lamp 37 is provided at the center of the swirling air duct. The photocatalytic component 35 is connected to the contact portion 38 on the side wall of the second housing 31 by a snap-fit ​​limiting and fixing method.

[0038] Specifically, a sound-absorbing component 39 is provided between the top of the inner wall of the photocatalytic component 35 and the second housing 31. The sound-absorbing component 39 is a group of sound-absorbing plates 40 arranged directly on the side wall of the second housing 31. The end of the sound-absorbing plate 40 facing the air inlet of the photocatalytic component 35 is arc-shaped, and a sound-absorbing cavity is formed between the sound-absorbing plates 40. Air outlets connected to the sound-absorbing cavity are provided on both sides of the outer wall of the second housing 31.

[0039] The sound-absorbing sheet 40 can be made of sound-absorbing material, such as polyester fiber, gypsum board, etc. The bottom of the first housing 2 is connected to the preheater 42 via the water pump 41. The conduit on the preheater 42 extends to the evaporator 43. The air outlet at one end of the evaporator 43 forms a closed loop with the compressor 44.

[0040] The crystallization process in the MVR evaporation crystallization equipment is as follows: After the material is heated in evaporator 43, a large amount of steam is generated. As the steam rises, the solute in the material gradually concentrates. The concentrated solution is cooled to saturation by a cooler, causing the solute to crystallize out. The crystallized product is separated by equipment such as a filter to obtain the desired crystalline product. The outer edge of the output shaft of the first motor 4 is provided with an movable opening that connects to the first housing 2. The movable opening is fitted with a sealing gasket by adhesive fixation. The vertical central axis of the output shaft of the first motor 4 and the vertical central axis of the bidirectional telescopic rod 5 are both kept on the same axis. The top of the first housing 2 is provided with a sewage inlet and a flocculant inlet.

[0041] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0042] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An MVR evaporation crystallization device for a zero-discharge wastewater treatment plant, characterized in that, include: Wastewater flocculation separation mechanism (1), the wastewater flocculation separation mechanism (1) includes a first box (2), the bottom of the first box (2) is connected to the bottom plate by compression springs (3) around the bottom, a first motor (4) is installed at the center of the bottom of the first box (2), the output shaft of the first motor (4) is connected to a bidirectional telescopic rod (5) placed inside the first box (2), and a first blade (6) is installed on the telescopic end (17) of the bidirectional telescopic rod (5); The bottom sides of the first housing (2) and the movable block (7) are connected by a swing rod (8). Limiting blocks (9) are installed on both sides of the movable block (7) along the length of the bottom plate. One end of the movable block (7) passes through the battery box (10) and extends to the tapered insert (12) at the gap between the battery packs (11). The battery packs (11) are equipped with a first motor (4) and an electric push rod (13) by electrical connection. The lifting rod (14) on the electric push rod (13) extends to the filter plate (15) on the inner wall of the first housing (2). One end of the filter plate (15) is connected to the telescopic end (17) on the bidirectional telescopic rod (5) by a bearing (16).

2. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 1, characterized in that, Both sides of the swing rod (8) are mounted on the first housing (2) and the movable block (7) by means of rotational connection. The outer edge of the telescopic end (17) of the bidirectional telescopic rod (5) is provided with an annular groove connected to the bearing (16), and the outer wall of the bearing (16) is connected to the filter plate (15) by means of limiting and fixing. The filter plate (15) is provided with filter holes (18) that are compatible with it.

3. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 2, characterized in that, The top end of the bidirectional telescopic rod (5) is connected to the first bevel gear (19). The outer wall of the first bevel gear (19) meshes with the second bevel gear (21) fixed on the first rotating shaft (20). One end of the first rotating shaft (20) is connected to the first rotating tooth (22). The outer wall of the first rotating tooth (22) meshes with the second rotating tooth (24) fixed on the second rotating shaft (23). The first bevel gear (19), the second bevel gear (21), the first rotating tooth (22) and the second rotating tooth (24) are all placed in the cover (25). One end of the cover (25) is fixed on the inner wall of the first box (2) by a crossbeam.

4. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 3, characterized in that, One end of the first rotating shaft (20) and the second rotating shaft (23) is connected to a movable shaft (27) via a conveyor belt (26). The outer wall of the movable shaft (27) is distributed with a ring array of baffles (28). One end of the baffles (28) is connected to a collection box (29) through an opening on the first box (2). The collection box (29) is connected to the outer wall of the first box (2) in a detachable manner.

5. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 1, characterized in that, It also includes an odor treatment mechanism (30), which includes a second housing (31). The second housing (31) and the first housing (2) are connected by an air pump (32). A second motor (33) is installed at the bottom of the second housing (31). The output shaft of the second motor (33) extends to the second blade (34). A photocatalytic component (35) is placed inside the second housing (31) directly above the second blade (34).

6. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 5, characterized in that, The photocatalytic component (35) includes a spiral air guide plate (36) forming a swirling air duct. Both the spiral air guide plate (36) and the swirling air duct are coated with photocatalyst, and an ultraviolet irradiation lamp (37) is provided at the center of the swirling air duct. The photocatalytic component (35) is connected to the contact part (38) on the side wall of the second housing (31) by a snap-fit ​​limiting and fixing method.

7. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 6, characterized in that, A silencing component (39) is provided between the top of the inner wall of the photocatalytic component (35) and the second housing (31). The silencing component (39) is a set of silencing plates (40) arranged directly on the side wall of the second housing (31). The end of each silencing plate (40) facing the air inlet of the photocatalytic component (35) is arc-shaped, and a silencing cavity is formed between the silencing plates (40). An air outlet connected to the silencing cavity is provided on both sides of the outer wall of the second housing (31).

8. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 1, characterized in that, The bottom of the first housing (2) is connected to a preheater (42) via a water pump (41). The conduit on the preheater (42) extends to the evaporator (43). The outlet of one end of the evaporator (43) forms a closed loop with the compressor (44).

9. The MVR evaporation crystallization equipment for a zero-discharge wastewater treatment plant according to claim 1, characterized in that, The outer edge of the output shaft of the first motor (4) is provided with an movable port that connects to the first housing (2). The movable port is fitted with a sealing gasket by adhesive fixation. The vertical central axis of the output shaft of the first motor (4) and the vertical central axis of the bidirectional telescopic rod (5) are both on the same axis. The top of the first housing (2) is provided with a sewage inlet and a flocculant inlet.

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