MVR (Mechanical Vapor Recompression) evaporating crystallizer

Abstract

The invention discloses an MVR (mechanical vapor recompression) evaporation crystallizer, which belongs to the technical field of evaporation crystallizers, and comprises an evaporation crystallizer body, a discharge pipe is inserted on the bottom wall of the evaporation crystallizer body, and a preheating assembly is arranged on the top wall of the evaporation crystallizer body; the preheating assembly comprises a heating box fixedly installed on the evaporation crystallizer body, a water inlet pipe is inserted into the heating box, a communicating pipe communicated with the evaporation crystallizer body is inserted into the bottom wall of the heating box, a spiral pipe is fixedly installed on the inner wall of the heating box, and a water outlet pipe is inserted into the spiral pipe. And a compressor is fixedly mounted on the side wall of the evaporation crystallizer body. According to the scheme, an impeller is arranged, water vapor can drive the impeller to rotate in the process of passing through the impeller, then a first cleaning rod and a second cleaning rod can be driven to rotate through a rotating rod in the rotating process of the impeller, and bristles are driven to clean dirt on the surface of a spiral coil, so that the preheating efficiency of waste water is improved; therefore, the wastewater evaporation efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of evaporation crystallizers, and more specifically to an MVR evaporation crystallizer. Background Art

[0002] Evaporation crystallization technology is an important separation process widely used in chemical, pharmaceutical, food and other fields. It removes solvents or solutes through evaporation and concentration, thereby achieving purification and concentration of the target product.

[0003] Although traditional evaporation devices such as single-effect or multi-effect evaporators can achieve basic purification and concentration goals, they generally have problems such as high energy consumption, low thermal efficiency, and limited evaporation capacity, which limit their application efficiency and economic benefits in large-scale industrial production. With the improvement of scientific and technological level, people have begun to improve traditional evaporation devices, among which MVR (mechanical vapor recompression) evaporation crystallizer has attracted much attention due to its energy saving and high efficiency.

[0004] In order to achieve more efficient evaporation and crystallization effects, wastewater needs to be preheated before entering the MVR evaporator crystallizer. In existing MVR evaporator crystallizers, wastewater preheating is usually achieved through an external heating device. Although this method can effectively increase the wastewater temperature to the required level, the additional heating equipment increases energy consumption, which not only increases operating costs, but also increases the environmental burden of the entire treatment process.

[0005] In view of the above problems, some solutions are also provided in the prior art. For example, the Chinese invention patent with announcement number CN118289871A discloses an MVR evaporation crystallizer and a method of using the same. By setting a steam preheating component and utilizing the spiral pipe in the steam preheating component, the high-temperature steam can be transported to the inside of the spiral pipe through the input pipe, so that the wastewater can be preheated through the spiral pipe, thereby optimizing the evaporation crystallization process and improving the wastewater treatment efficiency. Although the prior art can preheat the wastewater through steam, the spiral pipe is in contact with the wastewater for a long time and the wastewater contains a large amount of impurities, so that the surface of the spiral pipe is prone to dirt. As the dirt accumulates for a long time, it will affect the heat conduction effect of the steam into the wastewater, thereby seriously affecting the preheating effect, and then affecting the evaporation efficiency of the wastewater. Summary of the invention

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide an MVR evaporation crystallizer, which can improve the evaporation efficiency.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] An MVR evaporation crystallizer comprises an evaporation crystallizer body, a discharge pipe is inserted on the bottom wall of the evaporation crystallizer body, and a preheating component is arranged on the top wall of the evaporation crystallizer body;

[0009] The preheating assembly includes a heating box fixedly mounted on the evaporator crystallizer body, the heating box is provided with a water inlet pipe, a connecting pipe connected to the evaporator crystallizer body is inserted on the bottom wall of the heating box, a spiral coil is fixedly mounted on the inner wall of the heating box, a compressor whose input end is connected to the evaporator crystallizer body is fixedly mounted on the side wall of the evaporator crystallizer body, a steam pipe connected to the spiral coil is fixedly mounted on the output end of the compressor body, a mounting disk is fixedly mounted on the spiral coil, a rotating rod is rotatably mounted on the mounting disk, a first cleaning rod and a second cleaning rod for cleaning the spiral coil are respectively fixedly mounted on the rotating rod, bristles are fixedly mounted on the side walls adjacent to the first cleaning rod and the second cleaning rod, a driving assembly for driving the rotating rod to rotate is provided on the heating box, and an exhaust pipe connected to the spiral coil through the driving assembly is inserted in the heating box.

[0010] Furthermore, the driving assembly includes a mounting plate fixedly mounted on the top wall of the heating box, and the mounting plate is rotatably cooperated with the rotating rod, the mounting plate is provided with a cavity connected to the exhaust pipe, the rotating rod is fixedly mounted with a mounting frame, the mounting frame is fixedly mounted with an impeller, the rotating rod is provided with a first air groove connected to the cavity, the mounting plate is provided with an air cavity connected to the spiral coil, and the air cavity is connected to the first air groove.

[0011] Furthermore, a filter plate is installed in the vertical slide groove in the heating box, a mounting frame is fixedly installed on the inner wall of the heating box, an elastic pad is fixedly installed between the mounting frame and the filter plate, a push rod is fixedly installed on the bottom wall of the filter plate, and the bottom wall of the push rod is an inclined surface.

[0012] Furthermore, a linkage cavity is provided on the elastic pad, a first one-way valve whose input end is connected to the heating box is inserted on the bottom wall of the linkage cavity, a second one-way valve whose input end is connected to the linkage cavity is inserted on the linkage cavity, a first water pipe is inserted on the output end of the second one-way valve, an annular plate is rotatably installed on the rotating rod, and the annular plate is fixedly connected to the mounting frame through the first water pipe, an annular cavity connected to the first water pipe is provided on the annular plate, a second water pipe connected to the annular cavity is inserted on the rotating rod, cleaning cavities connected to the second water pipe are provided on the first cleaning rod and the second cleaning rod, and cleaning holes matching with the bristles are evenly provided on the cleaning cavities.

[0013] Furthermore, a scraper is rotatably mounted on the top wall of the filter plate, and a linkage groove is provided on the rotating rod for vertically sliding cooperation with the scraper. An impurity box for collecting impurities is installed on the side wall of the heating box, and a waste port connected to the impurity box is provided on the heating box.

[0014] Furthermore, a slide groove is provided on the top wall of the waste port, a sealing plate is slidably installed in the slide groove, and a first spring is fixedly installed between the top wall of the sealing plate and the slide groove, a sleeve is fixedly installed on the sealing plate, a piston rod with an inclined bottom wall is slidably installed in the sleeve, a second spring is installed in the common fixed groove between the top wall of the piston rod and the sleeve, and the bottom end of the piston rod is an inclined surface, a push block cooperating with the piston rod is fixedly installed on the scraper, and a fixing component cooperating with the sealing plate is provided on the impurity box.

[0015] Furthermore, the fixing assembly includes a groove opened on the top wall of the impurity box, a fixing rod is slidably installed in the groove, a third spring is fixedly installed between the fixing rod and the groove, an electric telescopic rod with an output end fixedly connected to the fixing rod is installed in the groove, a fixing hole matching the output end of the electric telescopic rod is opened on the sealing plate, and a waste valve is inserted into the bottom wall of the impurity box.

[0016] Furthermore, the elastic coefficient of the second spring is greater than the elastic coefficient of the first spring, and the elastic coefficient of the elastic pad is greater than the elastic coefficient of the second spring.

[0017] Furthermore, a sealing ring which is slidably matched with the rotating rod is fixedly mounted on the top wall of the scraper.

[0018] Furthermore, balls are rotatably mounted on both the air cavity and the hollow cavity.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) In this scheme, an impeller is provided, and when water vapor passes through the impeller, the impeller is driven to rotate. Then, during the rotation of the impeller, the first cleaning rod and the second cleaning rod are driven to rotate by the rotating rod, and the bristles are driven to clean the dirt on the surface of the spiral coil, thereby improving the preheating efficiency of the wastewater, and further improving the evaporation efficiency of the wastewater;

[0021] (2) This solution can filter large particles of impurities in the wastewater by setting a filter plate, thereby avoiding clogging the evaporator crystallizer body, which would require a lot of time to repair the evaporator crystallizer body. At the same time, during the rotation of the rotating rod, the impurities on the top wall of the filter plate can be driven into the impurity box, thereby avoiding impurities adhering to the top wall of the filter plate and affecting the speed of the wastewater flowing to the evaporator crystallizer body, thereby further improving the evaporation efficiency of the wastewater.

[0022] (3) This scheme arranges an elastic pad so that the filter plate can be shaken by the push rod during the rotation of the first cleaning rod, thereby facilitating the scraper to clean the impurities on the top wall of the filter plate. At the same time, during the shaking of the filter plate, the waste water can be driven to impact the spiral coil being cleaned through the cleaning hole on the first cleaning rod, thereby further improving the cleaning effect of the spiral coil, that is, further improving the preheating effect of the waste water, thereby further improving the evaporation efficiency of the waste water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a cross-sectional view of the heating box, impurity box and mounting plate of the present invention;

[0025] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0027] Figure 5 For the present invention Figure 4 Enlarged view of point C in the middle;

[0028] Figure 6 For the present invention Figure 4 Enlarged view of point D in the middle;

[0029] Figure 7 It is a cross-sectional view of the mounting plate, the first cleaning rod, and the rotating rod of the present invention;

[0030] Figure 8 It is a cross-sectional view of the sleeve and the piston rod of the present invention.

[0031] Description of the numbers in the figure:

[0032] 1. Evaporation crystallizer body; 2. Discharge pipe;

[0033] 3. Preheating assembly; 301. Heating box; 302. Water inlet pipe; 303. Connecting pipe; 304. Spiral coil; 305. Compressor; 306. Steam pipe; 307. Mounting plate; 308. Rotating rod; 309. First cleaning rod; 310. Second cleaning rod; 311. Brush; 312. Exhaust pipe;

[0034] 4. driving assembly; 401. mounting plate; 402. cavity; 403. mounting frame; 404. impeller; 405. first air groove; 406. air cavity;

[0035] 501, filter plate; 502, mounting frame; 503, elastic pad; 504, push rod; 505, linkage chamber; 506, first one-way valve; 507, second one-way valve; 508, first water pipe; 509, annular plate; 510, annular chamber; 511, second water pipe; 512, cleaning chamber; 513, cleaning hole;

[0036] 601, scraper; 602, linkage groove; 603, impurity box;

[0037] 701, sealing plate; 702, first spring; 703, sleeve; 704, piston rod; 705, second spring; 706, push block;

[0038] 8. Fixing assembly; 801. Fixing rod; 802. Third spring; 804. Electric telescopic rod; 805. Waste valve;

[0039] 9. Sealing ring; 10. Ball. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 to 8 , an MVR evaporation crystallizer, comprising an evaporation crystallizer body 1, a discharge pipe 2 is inserted on the bottom wall of the evaporation crystallizer body 1, and a preheating component 3 is provided on the top wall of the evaporation crystallizer body 1;

[0042] The preheating assembly 3 includes a heating box 301 fixedly mounted on the evaporation crystallizer body 1, a water inlet pipe 302 is inserted into the heating box 301, a connecting pipe 303 connected to the evaporation crystallizer body 1 is inserted into the bottom wall of the heating box 301, a spiral coil 304 is fixedly mounted on the inner wall of the heating box 301, a compressor 305 whose input end is connected to the evaporation crystallizer body 1 is fixedly mounted on the side wall of the evaporation crystallizer body 1, a steam pipe 306 connected to the spiral coil 304 is fixedly mounted on the output end of the compressor 305 body, and the A mounting plate 307 is fixedly mounted on the spiral coil 304, a rotating rod 308 is rotatably mounted on the mounting plate 307, a first cleaning rod 309 and a second cleaning rod 310 for cleaning the spiral coil 304 are respectively fixedly mounted on the rotating rod 308, bristles 311 are fixedly mounted on the side walls adjacent to the first cleaning rod 309 and the second cleaning rod 310, a driving assembly 4 for driving the rotating rod 308 to rotate is provided on the heating box 301, and an exhaust pipe 312 connected to the spiral coil 304 through the driving assembly 4 is inserted on the heating box 301.

[0043] The driving assembly 4 includes a mounting plate 401 fixedly mounted on the inner top wall of the heating box 301, and the mounting plate 401 is rotatably matched with the rotating rod 308, the mounting plate 401 is provided with a cavity 402 connected to the exhaust pipe 312, the rotating rod 308 is fixedly mounted with a mounting frame 403, the mounting frame 403 is fixedly mounted with an impeller 404, the rotating rod 308 is provided with a first air groove 405 connected to the cavity 402, the mounting disk 307 is provided with an air cavity 406 connected to the spiral coil 304, and the air cavity 406 is connected to the first air groove 405.

[0044] When in use, the waste water enters the heating box 301 through the water inlet pipe 302, and then enters the evaporation crystallizer body 1 through the connecting pipe 303 on the heating box 301, and then the evaporation crystallizer body 1 evaporates, concentrates and crystallizes the waste water, and then the substances after the evaporation, concentration and crystallization of the waste water can be discharged to the outside through the discharge pipe 2. At the same time, the water vapor after the waste water evaporates flows to the compressor 305, and flows to the steam pipe 306 after being compressed and heated by the compressor 305, and then flows to the spiral coil 304 through the steam pipe 306. In the process of the water vapor passing through the spiral coil 304, the waste water near the spiral coil 304 can be preheated, and then the waste water flows to the evaporation crystallizer body 1 after being preheated, which can improve the evaporation efficiency of the waste water; at the same time, after the water vapor passes through the spiral coil 304, , water vapor flows into the first air groove 405 through the air cavity 406, and flows out through the first air groove 405, the cavity 402, and the exhaust pipe 312. In the process of water vapor passing through the cavity 402, it will hit the impeller 404 and drive the impeller 404 to rotate. In the process of the impeller 404 rotating, the rotating rod 308 can be driven to rotate through the mounting frame 403. In the process of the rotating rod 308 rotating, the first cleaning rod 309 and the second cleaning rod 310 are driven to rotate. Then, in the process of the first cleaning rod 309 and the second cleaning rod 310 rotating, the corresponding bristles 311 can be driven to rotate. Then, in the process of the bristles 311 rotating, the dirt on the spiral coil 304 can be cleaned, thereby improving the preheating effect of the water vapor on the wastewater through the spiral coil 304, thereby improving the evaporation efficiency of the wastewater.

[0045] like Figure 1 , Figure 2 , Figure 4 , Figure 7 As shown, a filter plate 501 is installed in the vertical slide groove in the heating box 301, a mounting frame 502 is fixedly installed on the inner wall of the heating box 301, an elastic pad 503 is fixedly installed between the mounting frame 502 and the filter plate 501, a push rod 504 is fixedly installed on the bottom wall of the filter plate 501, and the bottom wall of the push rod 504 is an inclined surface.

[0046] The elastic pad 503 is provided with a linkage chamber 505, and a first one-way valve 506 whose input end is connected to the heating box 301 is inserted on the bottom wall of the linkage chamber 505, and a second one-way valve 507 whose input end is connected to the linkage chamber 505 is inserted on the linkage chamber 505, and a first water pipe 508 is inserted on the output end of the second one-way valve 507, an annular plate 509 is rotatably installed on the rotating rod 308, and the annular plate 509 is fixedly connected to the mounting frame 502 through the first water pipe 508, an annular chamber 510 connected to the first water pipe 508 is provided on the annular plate 509, and a second water pipe 511 connected to the annular chamber 510 is inserted on the rotating rod 308, and a cleaning chamber 512 connected to the second water pipe 511 is provided on both the first cleaning rod 309 and the second cleaning rod 310, and cleaning holes 513 cooperating with the bristles 311 are evenly provided on the cleaning chamber 512.

[0047] A scraper 601 is rotatably mounted on the top wall of the filter plate 501, and a linkage groove 602 is provided on the rotating rod 308 for vertically sliding cooperation with the scraper 601. An impurity box 603 for collecting impurities is installed on the side wall of the heating box 301, and a waste port connected to the impurity box 603 is provided on the heating box 301.

[0048] By adopting the above technical solution, in the process of wastewater passing through the heating box 301, the filter plate 501 can block large particles of impurities in the wastewater, thereby effectively preventing the impurities from clogging the evaporator crystallizer body 1, resulting in the need to shut down the evaporator crystallizer body 1 and spend time repairing the evaporator crystallizer body 1, and then in the process of the rotation of the rotating rod 308, the scraper 601 can be driven to rotate, and in the process of the rotation of the scraper 601, the impurities on the top wall of the filter plate 501 can be driven to rotate, and then under the action of centrifugal force, the impurities gradually move away from the rotating rod 308 and enter the impurity box 603 through the waste port, thereby avoiding the accumulation of impurities on the surface of the filter plate 501, affecting the speed of wastewater flowing to the evaporator crystallizer body 1, and further improving the evaporation crystallization efficiency.

[0049] During the rotation of the first cleaning rod 309, the first cleaning rod 309 gradually contacts the inclined surface of the push rod 504 and applies a thrust to the inclined surface of the push rod 504. Then, under the action of the thrust, the push rod 504 drives the filter plate 501 to move upward and stretches the elastic pad 503. When the push rod 504 is out of contact with the first cleaning rod 309, the elastic pad 503 contracts and drives the filter plate 501 to move downward. Since the scraper 601 rotates with the filter plate 501, the scraper 601 is driven to slide along the linkage groove 602 during the up and down movement of the filter plate 501. The bottom wall of the scraper 601 is always in contact with the filter plate 501, and during the rotation of the rotating rod 308, the scraper 601 is driven to rotate along the top wall of the filter plate 501 through the linkage groove 602 to clean the top wall of the filter plate 501. At the same time, during the up and down reciprocating motion of the filter plate 501, the impurities on the top wall of the filter plate 501 can be driven to shake, thereby loosening the impurities on the top wall of the filter plate 501, thereby facilitating the scraper 601 to clean the impurities on the top wall of the filter plate 501, thereby improving the cleaning effect of the filter plate 501.

[0050] During the stretching of the elastic pad 503, the linkage chamber 505 absorbs waste water from the heating box 301 through the first one-way valve 506. Then, during the contraction of the elastic pad 503, the waste water in the linkage chamber 505 flows into the annular chamber 510 through the second one-way valve 507 and the first water pipe 508, and flows into the second water pipe 511 through the annular chamber 510. Then, the waste water flows into the cleaning chamber 512 through the second water pipe 511, and impacts the spiral coil 304 being cleaned by the bristles 311 through the cleaning hole 513 on the cleaning chamber 512, further enhancing the preheating effect of the water vapor on the waste water, thereby further improving the evaporation efficiency of the waste water.

[0051] like Figure 1 , Figure 2 , Figure 6 , Figure 8 As shown, a slide groove is provided on the top wall of the waste port, a sealing plate 701 is slidably installed in the slide groove, and a first spring 702 is fixedly installed between the top wall of the sealing plate 701 and the slide groove, a sleeve 703 is fixedly installed on the sealing plate 701, a piston rod 704 with an inclined bottom wall is slidably installed in the sleeve 703, a second spring 705 is installed in the fixed groove between the top wall of the piston rod 704 and the sleeve 703, and the bottom end of the piston rod 704 is an inclined surface, a push block 706 cooperating with the piston rod 704 is fixedly installed on the scraper 601, and a fixing component 8 cooperating with the sealing plate 701 is provided on the impurity box 603.

[0052] The fixing assembly 8 includes a groove provided on the top wall of the impurity box 603, a fixing rod 801 is slidably installed in the groove, a third spring 802 is fixedly installed between the fixing rod 801 and the groove, an electric telescopic rod 804 whose output end is fixedly connected to the fixing rod 801 is installed in the groove, a fixing hole matching the output end of the electric telescopic rod 804 is provided on the sealing plate 701, and a waste valve 805 is inserted into the bottom wall of the impurity box 603.

[0053] By adopting the above technical solution, in the initial state, the first spring 702 and the second spring 705 are both in a freely extended state, and the push block 706 is driven to rotate during the rotation of the scraper 601. During the rotation of the push block 706, it gradually contacts the inclined surface of the piston rod 704 and applies a thrust to the inclined surface of the piston rod 704. Then, under the action of the thrust, the piston rod 704 drives the sealing plate 701 to move upward through the second spring 705 and the sleeve 703. At this time, the first spring 702 is compressed and has a tendency to recover. Then, after the upward output end of the sealing plate 701 is out of contact, the first spring 702 stretches and drives the sealing plate 701 to move downward to block the waste port, thereby preventing a large amount of impurities in the impurity box 603 from adhering to the top wall of the filter plate 501 through the waste port again, thereby improving the cleaning effect of the filter plate 501.

[0054] In the initial state, the third spring 802 is in a compressed state. When there are too many impurities in the impurity box 603 and they need to be cleaned, the user can control the output end of the electric telescopic rod 804 to contract. At this time, the third spring 802 stretches and drives the fixed rod 801 to move toward the fixed hole. At the same time, the fixed hole is driven to move up and down during the up and down movement of the sealing plate 701. Then, when the sealing plate 701 blocks the waste port, the sealing plate 701 drives the fixed hole to contact the fixed rod 801. At this time, the third spring 802 drives the fixed rod 801 to insert into the fixed hole and fix the sealing plate 701. Then, the user can open the waste valve 805, so that the impurities in the impurity box 603 flow to the outside through the waste valve 805. When the impurities are cleaned, the user can control the output end of the electric telescopic rod 804 to stretch. During the extension of the output end of the electric telescopic rod 804, the fixed rod 801 is driven to disengage from the fixed hole and squeeze the third spring 802. There is no need to stop the evaporator crystallizer body 1 and spend time cleaning the impurity box 603, thereby improving the efficiency of wastewater evaporation.

[0055] like Figure 2 , Figure 4 , Figure 8 As shown, the elastic coefficient of the second spring 705 is greater than the elastic coefficient of the first spring 702 , and the elastic coefficient of the elastic pad 503 is greater than the elastic coefficient of the second spring 705 .

[0056] By adopting the above technical solution, by making the elastic coefficient of the second spring 705 greater than the elastic coefficient of the first spring 702, it can be ensured that during the rotation of the scraper 601, the sealing plate 701 is driven to move upward normally through the piston rod 704, the second spring 705, and the sleeve 703. By making the elastic coefficient of the elastic pad 503 greater than the elastic coefficient of the second spring 705, after the fixing rod 801 fixes the sealing plate 701, the rotating rod 308 drives the scraper 601 to contact the inclined surface of the piston rod 704, and the scraper 601 will drive the piston rod 704 to move upward through the inclined surface of the piston rod 704 and compress the second spring 705, thereby ensuring the normal operation of the device.

[0057] like Figure 5 As shown, a sealing ring 9 is fixedly mounted on the top wall of the scraper 601 and is slidably matched with the rotating rod 308 .

[0058] By adopting the above technical solution, when the scraper 601 moves up and down along the linkage groove 602, the scraper 601 drives the sealing ring 9 to move up and down, and the linkage groove 602 can be always blocked during the up and down movement of the sealing ring 9, thereby preventing impurities from entering the linkage groove 602 and affecting the normal up and down movement of the scraper 601 along the linkage groove 602.

[0059] like Figure 3 , Figure 7 As shown, the air cavity 406 and the cavity 402 are both rotatably mounted with balls 10.

[0060] By adopting the above technical solution, during the rotation of the rotating rod 308, sliding friction will be generated between the rotating rod 308 and the air cavity 406 and the cavity 402. By evenly rotating the ball 10 installed on the air cavity 406 and the cavity 402, the sliding friction can be converted into rolling friction, thereby reducing the resistance of the rotating rod 308, thereby ensuring the normal rotation of the rotating rod 308.

[0061] Method of use: wastewater enters the heating box 301 through the water inlet pipe 302, and then enters the evaporation crystallizer body 1 through the connecting pipe 303 on the heating box 301, and then the evaporation crystallizer body 1 evaporates, concentrates and crystallizes the wastewater. When the water vapor passes through the impeller 404, the impeller 404 drives the rotating rod 308 to rotate, and then during the rotation of the rotating rod 308, the first cleaning rod 309 and the second cleaning rod 310 can be rotated, and the bristles 311 can be driven to clean the spiral coil 304. At the same time, during the rotation of the rotating rod 308, the scraper 601 can be driven to rotate, and the impurities on the top wall of the filter plate 501 can be cleaned. The impurities on the top wall of the filter plate 501 become loose, which is convenient for the scraper 601 to clean the impurities. In the process of the filter plate 501 shaking, the waste water can be driven through the cleaning hole 513 on the first cleaning rod 309 to impact the spiral coil 304 normally cleaned by the bristles 311. Then, when there are too many impurities in the impurity box 603, the user can insert the fixing rod 801 into the fixing hole and fix the sealing plate 701. Then, the user can open the waste valve 805 to clean the impurities.

[0062] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An MVR evaporation crystallizer, comprising an evaporation crystallizer body (1), a discharge pipe (2) being inserted on the bottom wall of the evaporation crystallizer body (1), and a preheating assembly (3) being provided on the top wall of the evaporation crystallizer body (1); Features: The preheating assembly (3) comprises a heating box (301) fixedly mounted on the evaporation crystallizer body (1); a water inlet pipe (302) is inserted into the heating box (301); a connecting pipe (303) connected to the evaporation crystallizer body (1) is inserted into the bottom wall of the heating box (301); a spiral coil (304) is fixedly mounted on the inner wall of the heating box (301); a compressor (305) whose input end is connected to the evaporation crystallizer body (1) is fixedly mounted on the side wall of the evaporation crystallizer body (1); a steam pipe (306) connected to the spiral coil (304) is fixedly mounted on the output end of the compressor (305); A mounting plate (307) is fixedly mounted on the coil (304), a rotating rod (308) is rotatably mounted on the mounting plate (307), a first cleaning rod (309) and a second cleaning rod (310) for cleaning the spiral coil (304) are respectively fixedly mounted on the rotating rod (308), bristles (311) are fixedly mounted on the side walls adjacent to the first cleaning rod (309) and the second cleaning rod (310), a driving assembly (4) for driving the rotating rod (308) to rotate is provided on the heating box (301), and an exhaust pipe (312) connected to the spiral coil (304) through the driving assembly (4) is inserted into the heating box (301).

2. The MVR evaporation crystallizer according to claim 1, characterized in that: The driving assembly (4) comprises a mounting plate (401) fixedly mounted on the inner top wall of the heating box (301), and the mounting plate (401) is rotatably matched with the rotating rod (308); a cavity (402) connected to the exhaust pipe (312) is formed on the mounting plate (401); a mounting frame (403) is fixedly mounted on the rotating rod (308); an impeller (404) is fixedly mounted on the mounting frame (403); a first air groove (405) connected to the cavity (402) is formed on the rotating rod (308); an air cavity (406) connected to the spiral coil (304) is formed on the mounting plate (307), and the air cavity (406) is connected to the first air groove (405).

3. The MVR evaporation crystallizer according to claim 2, characterized in that: A filter plate (501) is installed in a vertical slide groove in the heating box (301), a mounting frame (502) is fixedly installed on the inner wall of the heating box (301), an elastic pad (503) is fixedly installed between the mounting frame (502) and the filter plate (501), a push rod (504) is fixedly installed on the bottom wall of the filter plate (501), and the bottom wall of the push rod (504) is an inclined surface.

4. The MVR evaporation crystallizer according to claim 3, characterized in that: The elastic pad (503) is provided with a linkage chamber (505), the bottom wall of the linkage chamber (505) is provided with a first one-way valve (506) whose input end is connected to the heating box (301), the linkage chamber (505) is provided with a second one-way valve (507) whose input end is connected to the linkage chamber (505), the output end of the second one-way valve (507) is provided with a first water pipe (508), the rotating rod (308) is rotatably mounted with an annular plate (509), and the annular plate (509) is connected to the heating box (301) through a first one-way valve (507). The water pipe (508) is fixedly connected to the mounting frame (502); an annular cavity (510) communicating with the first water pipe (508) is provided on the annular plate (509); a second water pipe (511) communicating with the annular cavity (510) is inserted on the rotating rod (308); a cleaning cavity (512) communicating with the second water pipe (511) is provided on the first cleaning rod (309) and the second cleaning rod (310); and cleaning holes (513) cooperating with the bristles (311) are evenly provided on the cleaning cavity (512).

5. The MVR evaporation crystallizer according to claim 4, characterized in that: A scraper (601) is rotatably mounted on the top wall of the filter plate (501), and a linkage groove (602) is provided on the rotating rod (308) for vertically sliding cooperation with the scraper (601). An impurity box (603) for collecting impurities is installed on the side wall of the heating box (301), and a waste material port connected to the impurity box (603) is provided on the heating box (301).

6. The MVR evaporation crystallizer according to claim 5, characterized in that: A slide groove is provided on the top wall of the waste port, a sealing plate (701) is slidably installed in the slide groove, and a first spring (702) is fixedly installed between the top wall of the sealing plate (701) and the slide groove, a sleeve (703) is fixedly installed on the sealing plate (701), a piston rod (704) with an inclined bottom wall is slidably installed in the sleeve (703), a second spring (705) is installed in a fixed groove between the top wall of the piston rod (704) and the sleeve (703), and the bottom end of the piston rod (704) is an inclined surface, a push block (706) cooperating with the piston rod (704) is fixedly installed on the scraper (601), and a fixing component (8) cooperating with the sealing plate (701) is provided on the impurity box (603).

7. The MVR evaporation crystallizer according to claim 6, characterized in that: The fixing assembly (8) comprises a groove formed on the top wall of the impurity box (603), a fixing rod (801) being slidably mounted in the groove, a third spring (802) being fixedly mounted between the fixing rod (801) and the groove, an electric telescopic rod (804) having an output end fixedly connected to the fixing rod (801) being mounted in the groove, a fixing hole matching the output end of the electric telescopic rod (804) being formed on the sealing plate (701), and a waste valve (805) being inserted into the bottom wall of the impurity box (603).

8. The MVR evaporation crystallizer according to claim 7, characterized in that: The elastic coefficient of the second spring (705) is greater than the elastic coefficient of the first spring (702), and the elastic coefficient of the elastic pad (503) is greater than the elastic coefficient of the second spring (705).

9. The MVR evaporation crystallizer according to claim 5, characterized in that: A sealing ring (9) is fixedly mounted on the top wall of the scraper (601) and is slidably matched with the rotating rod (308).

10. The MVR evaporation crystallizer according to claim 2, characterized in that: Balls (10) are rotatably mounted on both the air cavity (406) and the cavity (402).

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