Crystal slurry circulating MVR device
By designing a crystal slurry circulation MVR device, the mother liquor falls into the centrifuge under its own gravity, and the conveying pipe is cleared by valves and backflushing components, thus solving the problem of material blockage in the MVR device and achieving normal operation and efficient separation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YICHANG BRUNP RECYCLING TECH CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-08-04
AI Technical Summary
During the crystal slurry circulation process in the MVR unit, the pipelines transporting the slurry to the centrifuge are prone to blockage or material buildup, which affects the normal operation of the unit.
A crystal slurry circulation MVR device was designed, in which the mother liquor in the crystallization separation unit falls into the centrifuge unit under its own gravity, and the first and second valves, together with the first backflushing component, are used to clear the conveying pipe and prevent blockage.
It effectively prevented the mother liquor from clogging the feed pipe, ensuring the normal operation of the MVR unit, improving the separation efficiency and salt output efficiency of crystallized salt, and reducing the water content.
Smart Images
Figure CN224585364U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of evaporation crystallization technology, and more specifically, to a crystal slurry circulation MVR device. Background Technology
[0002] MVR (Mechanical Vapor Recompression) evaporation crystallization devices use a compressor to compress the secondary steam generated in the evaporator, increasing its temperature and pressure before reusing it as a heat source, thus achieving heat energy recycling and avoiding the waste of large amounts of steam in traditional evaporation processes. Common MVR device operation procedures are relatively cumbersome. When using a crystal slurry circulation method, material blockage or agglomeration can easily occur in the pipeline transporting the crystal slurry to the centrifuge, affecting the normal operation of the MVR device. Utility Model Content
[0003] The purpose of this invention is to provide a crystal slurry circulation MVR device, which allows the mother liquor containing crystalline salts to fall from the crystallization separation unit into the centrifuge unit under its own gravity, preventing the mother liquor containing crystalline salts from clogging the first feed pipe and ensuring the normal operation of the crystal slurry circulation MVR device.
[0004] The first aspect of this utility model provides a slurry circulation MVR device, which includes:
[0005] Crystallization separation component;
[0006] The feeding assembly includes a first feeding pipe, a first valve, and a second valve. One end of the first feeding pipe is connected to the feeding end of the crystallization separator. The first valve and the second valve are respectively disposed at opposite ends of the first feeding pipe.
[0007] A first backflush assembly is connected to the first feed pipe and is located between the first valve and the second valve.
[0008] The centrifuge has an input end connected to the end of the first feed pipe away from the crystallization separator, and the height of the input end of the centrifuge is less than the height of the discharge end of the crystallization separator. The centrifuge is provided with a first output port and a second output port, and the first output port is used to communicate with the outside.
[0009] The storage device has its input end connected to the second output port and its output end connected to the input end pipeline of the crystallization separation device.
[0010] In one possible embodiment of the present invention, the first backflush assembly includes a first backflush member, which is connected to the first feed pipe.
[0011] In one possible embodiment of the present invention, the first backflushing assembly further includes a first cleaning component, which is connected to the first conveying pipe and is arranged side by side with the first backflushing component.
[0012] In one possible embodiment of this utility model, the angle between the first conveying pipe and the vertical plane is θ, which satisfies 30°≤θ≤60°.
[0013] In one possible embodiment of this utility model, the crystal slurry circulation MVR device further includes a forced circulation pump and an evaporator. The crystallization separator is also provided with a first connection end and a second connection end. The first connection end of the crystallization separator is connected to one end of the evaporator through the forced circulation pump, and the end of the evaporator away from the forced circulation pump is connected to the second connection end of the crystallization separator.
[0014] In one possible embodiment of this utility model, the storage device includes a mother liquor tank and a mother liquor pump. The input end of the mother liquor tank is connected to the second output port, and the output end of the mother liquor tank is connected to the input end of the crystallization separation device through the mother liquor pump.
[0015] In one possible embodiment of the present invention, the storage device further includes a second backflushing assembly and a second feed pipe, the opposite ends of the second feed pipe being connected to the mother liquor pump and the input end of the crystallization separator, respectively, the second backflushing assembly being connected to the second feed pipe, and the second backflushing assembly being located between the mother liquor pump and the input end of the crystallization separator.
[0016] In one possible embodiment of the present invention, the second backflushing assembly includes a second backflushing member and a second cleaning member, the second backflushing member and the second cleaning member are arranged side by side, the second backflushing member is connected to the second conveying pipe, and the second cleaning member is connected to the second conveying pipe.
[0017] In one possible embodiment of this utility model, the crystal slurry circulation MVR device further includes a steam compressor connected to the crystallization separator, and the steam compressor is used to pressurize and heat the steam and deliver it to the crystallization separator.
[0018] In one possible embodiment of the present invention, the crystal slurry circulation MVR device further includes a preheating element, which is connected to the crystallization separation element.
[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a crystal slurry circulation MVR device. The crystallization separation element is used to evaporate and crystallize high-concentration mother liquor to achieve the purpose of separating crystalline salts in the high-concentration mother liquor. The height of the input end of the centrifuge element is less than the height of the output end of the crystallization separation element, so that the mother liquor containing crystalline salts in the crystallization separation element falls from the crystallization separation element into the centrifuge element under its own gravity. The centrifuge element is used to centrifuge and separate the mother liquor and the precipitated crystalline salts. The first valve and the second valve are respectively used to control the corresponding positions of the first feed pipe. When the first feed pipe is blocked, the first backflushing component and the first valve and the second valve work together to clear the first feed pipe and backflushing the blocked material into the crystallization separation element or the centrifuge element, preventing the mother liquor containing crystalline salts from blocking the first feed pipe and ensuring the normal operation of the crystal slurry circulation MVR device. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of the crystal slurry circulation MVR device provided in some embodiments of the present invention. Figure 1 ;
[0022] Figure 2 This is a schematic diagram of the structure of the crystal slurry circulation MVR device provided in some embodiments of the present invention. Figure 2 .
[0023] Explanation of key component symbols;
[0024] 100-MVR device for crystal slurry circulation; 110-Crystallization separation component; 111-Feeding end; 112-First connection end; 113-Second connection end; 120-Feeding assembly; 121-First conveying pipe; 122-First valve; 123-Second valve; 130-First backflushing assembly; 131-First backflushing component; 132-First cleaning component; 140-Centrifugation component; 141-First output port; 142-Second output port; 150-Storage component; 151-Mother liquor tank; 152-Mother liquor pump; 153-Second conveying pipe; 154-Second backflushing assembly; 1541-Second backflushing component; 1542-Second cleaning component; 160-Forced circulation pump; 170-Evaporator. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0032] refer to Figure 1 As shown, an embodiment of this application provides a crystal slurry circulation MVR device 100, which includes a crystallization separation component 110, a feeding component 120, a first backflushing component 130, a centrifugation component 140, and a storage component 150.
[0033] Specifically, in combination Figure 1 and Figure 2 As shown, the crystallization separator 110 is used to evaporate and crystallize high-concentration mother liquor to achieve the purpose of separating crystalline salts from the high-concentration mother liquor. The feeding assembly 120 includes a first feeding pipe 121, a first valve 122, and a second valve 123. One end of the first feeding pipe 121 is connected to the feeding end 111 of the crystallization separator 110. The first valve 122 and the second valve 123 are respectively disposed at opposite ends of the first feeding pipe 121. The first backflushing assembly 130 is connected to the first feeding pipe 121 and is located between the first valve 122 and the second valve 123.
[0034] In this embodiment, the input end of the centrifuge element 140 is connected to the end of the first conveying pipe 121 away from the crystallization separator 110, and the height of the input end of the centrifuge element 140 is less than the height of the discharge end 111 of the crystallization separator 110. The centrifuge element 140 is provided with a first output port 141 and a second output port 142. The first output port 141 is used to communicate with the outside. The input end of the storage element 150 is connected to the second output port 142, and the output end of the storage element 150 is connected to the input end pipeline of the crystallization separator 110. Correspondingly, the height of the input end of the centrifuge element 140 is less than the height of the output end of the crystallization separator 110, so that the crystallization separator 110 contains... Under the action of gravity, the mother liquor of the crystallized salt falls from the crystallization separator 110 into the centrifuge 140. The centrifuge 140 is used to centrifuge and separate the mother liquor and the precipitated crystallized salt. The first valve 122 and the second valve 123 are respectively used to control the corresponding positions of the first feed pipe 121. When the first feed pipe 121 is blocked, the first backflushing component 130 and the first valve 122 and the second valve 123 work together to clear the first feed pipe 121 and backflushing the blocked material into the crystallization separator 110 or the centrifuge 140, so as to prevent the mother liquor containing crystallized salt from blocking the first feed pipe 121 and ensure the normal operation of the crystal slurry circulation MVR device 100.
[0035] For example, the first valve 122 is located at one end of the first conveying pipe 121 near the crystallization separator 110, and the second valve 123 is located at one end of the first conveying pipe 121 near the centrifuge 140. When the first conveying pipe 121 becomes blocked, the first valve 122 can be opened while the second valve 123 is closed, activating the first backflushing assembly 130. This allows the first backflushing assembly 130 to flush the inner wall of the first conveying pipe 121 and remove the material adhering to the inner wall of the first conveying pipe 121 through the second valve 123. A valve 122 backflushes to the crystallization separator 110. In addition, when the first feed pipe 121 is blocked, the second valve 123 can be opened while the first valve 122 is closed, and the first backflush assembly 130 is activated. The first backflush assembly 130 flushes the inner wall of the first feed pipe 121 and can backflush the material adhering to the inner wall of the first feed pipe 121 into the centrifuge 140 through the second valve 123, thereby cleaning the inner wall of the first feed pipe 121 to prevent blockage.
[0036] It should be noted that the crystallization separator 110 is a device that achieves solid-liquid separation through the difference in surface tension of solid particles. Common crystallization separators 110 are equipped with salt legs, which are used for salt collection, grading, washing impurities, redissolving soluble impurities, and conveying salt slurry. However, this application uses crystal slurry circulation. The crystal slurry circulation MVR device 100 of this application does not have salt legs. Therefore, the mother liquor containing crystallized salt will not enter the salt legs, but will continue to evaporate and concentrate with the mother liquor in the crystallization separator 110. During this process, the crystallized salt gradually grows and develops into larger crystal particles. For example, the crystal slurry ratio of the mother liquor containing crystallized salt is made greater than 5% to improve the salt output efficiency of the crystallized salt and reduce the water content of the crystallized salt.
[0037] In one embodiment, alternatively, referencing Figure 2 As shown, the first backflushing assembly 130 includes a first backflushing member 131, which is connected to the first conveying pipe 121. The first backflushing member 131 is conveyed to the first conveying pipe 121 by a medium and flushes the inner wall of the first conveying pipe 121 and backflushes the blocked material into the crystallization separation unit 110 or the centrifugation unit 140.
[0038] In one embodiment, alternatively, referencing Figure 1As shown, the crystal slurry circulation MVR device 100 also includes a forced circulation pump 160 and an evaporator 170. The crystallization separator 110 is also provided with a first connection end 112 and a second connection end 113. The first connection end 112 of the crystallization separator 110 is connected to one end of the evaporator 170 through the forced circulation pump 160. The end of the evaporator 170 away from the forced circulation pump 160 is connected to the second connection end 113 of the crystallization separator 110. The evaporator 170 is used to heat the material. The material flowing in the tube side of the evaporator 170 exchanges heat with the steam. The forced circulation pump 160 is used to drive the material to circulate between the evaporator 170 and the crystallization separator 110. The preheated material enters the evaporator 170 through the forced circulation pump 160. After being heated, it enters the crystallization separator 110 so as to form crystal slurry after crystallization in the supersaturated salt solution of the crystallization separator 110.
[0039] Optionally, the crystal slurry circulation MVR device 100 also includes a steam compressor connected to the crystallization separator 110. The steam compressor is used to pressurize and heat the steam and deliver it to the crystallization separator 110. The steam compressor sends the compressed steam back to the heater as a heating source to provide heat for the evaporation of the material and realize the recycling of steam energy.
[0040] In summary, the crystallization separator 110 of the crystal slurry circulation MVR device 100 is used to evaporate and crystallize high-concentration mother liquor, thereby achieving the purpose of separating crystalline salts from the high-concentration mother liquor. The height of the input end of the centrifuge 140 is less than the height of the output end of the crystallization separator 110, so that the mother liquor containing crystalline salts in the crystallization separator 110 falls from the crystallization separator 110 into the centrifuge 140 under its own gravity. The centrifuge 140 is used to centrifuge and separate the mother liquor and the precipitated crystalline salts. The first valve 122 and the second valve 123 are respectively used to control the corresponding positions of the first feed pipe 121. When the first feed pipe 121 is blocked, the first backflushing component 130 and the first valve 122 and the second valve 123 work together to clear the first feed pipe 121, backflushing the blocked material into the crystallization separator 110 or the centrifuge 140, preventing the mother liquor containing crystalline salts from blocking the first feed pipe 121, and ensuring the normal operation of the crystal slurry circulation MVR device 100.
[0041] refer to Figure 1 As shown, embodiments of this application provide another crystal slurry circulation MVR device 100, which includes a crystallization separation component 110, a feeding component 120, a first backflushing component 130, a centrifugation component 140, and a storage component 150.
[0042] Specifically, in combination Figure 1 and Figure 2As shown, the crystallization separator 110 is used to evaporate and crystallize high-concentration mother liquor to achieve the purpose of separating crystalline salts from the high-concentration mother liquor. The feeding assembly 120 includes a first feeding pipe 121, a first valve 122, and a second valve 123. One end of the first feeding pipe 121 is connected to the feeding end 111 of the crystallization separator 110. The first valve 122 and the second valve 123 are respectively disposed at opposite ends of the first feeding pipe 121. The first backflushing assembly 130 is connected to the first feeding pipe 121 and is located between the first valve 122 and the second valve 123. The input end of the centrifuge element 140 is connected to the end of the first feed pipe 121 away from the crystallization separator 110, and the height of the input end of the centrifuge element 140 is less than the height of the discharge end 111 of the crystallization separator 110. The centrifuge element 140 is provided with a first output port 141 and a second output port 142. The first output port 141 is used to communicate with the outside. The input end of the storage element 150 is connected to the second output port 142, and the output end of the storage element 150 is connected to the input end pipeline of the crystallization separator 110. Correspondingly, the height of the input end of the centrifuge element 140 is less than the height of the output end of the crystallization separator 110, so that the crystallization separator 110 contains crystalline salts. The mother liquor falls from the crystallization separator 110 into the centrifuge 140 under its own gravity. The centrifuge 140 is used to centrifuge and separate the mother liquor and the precipitated crystallized salt. The first valve 122 and the second valve 123 are respectively used to control the corresponding position of the first feed pipe 121. When the first feed pipe 121 is blocked, the first backflushing component 130 and the first valve 122 and the second valve 123 work together to clear the first feed pipe 121 and backflushing the blocked material into the crystallization separator 110 or the centrifuge 140, so as to prevent the mother liquor with crystallized salt from blocking the first feed pipe 121 and ensure the normal operation of the crystal slurry circulation MVR device 100.
[0043] In one embodiment, alternatively, referencing Figure 2 As shown, the first backflushing assembly 130 includes a first backflushing member 131, which is connected to the first conveying pipe 121. The first backflushing member 131 conveys a medium into the first conveying pipe 121, flushes the inner wall of the first conveying pipe 121, and backflushes the blocked material into the crystallization separation unit 110 or the centrifugation unit 140. For example, the first backflushing member 131 is used to convey water at a preset pressure to flush and backflush the inner wall of the first conveying pipe 121.
[0044] Optionally, the first backflushing assembly 130 further includes a first cleaning element 132, which is connected to the first conveying pipe 121. The first cleaning element 132 and the first backflushing element 131 are arranged side by side. The first cleaning element 132 can also be conveyed into the first conveying pipe 121 by a medium to clean the material adhering to the inner wall of the first conveying pipe 121 and carry out the loosened and softened material. For example, the first backflushing element 131 is used to convey high-temperature steam to melt or soften the crystalline salt adhering to the inner wall of the first conveying pipe 121.
[0045] The first backflushing member 131 and the first cleaning member 132 can be used together. First, high-temperature steam is introduced through the first cleaning member 132 to soften the crystallized salt adhering to the inner wall of the first conveying pipe 121. Then, the softened crystallized salt is backflushed into the crystallization separation member 110 or the centrifugal member 140 through the first backflushing member 131, thereby reducing the possibility of material blockage in the first conveying pipe 121.
[0046] In one embodiment, optionally, the angle between the first conveying pipe 121 and the vertical plane is θ, satisfying 30°≤θ≤60°. The vertical plane refers to the height direction of the crystal slurry circulation MVR device 100, that is, the angle θ between the first conveying pipe 121 and the vertical plane is greater than or equal to 30°. The crystallization separator 110 is connected to the centrifuge 140 through the first conveying pipe 121. The height of the input end of the centrifuge 140 is less than the height of the discharge end 111 of the crystallization separator 110, so that the crystallized salt can fall more smoothly into the centrifuge 140 under its own gravity through the discharge end 111 of the crystallization separator 110. This will not affect the backflushing effect of the first conveying pipe 121. For example, when the angle θ between the first conveying pipe 121 and the vertical plane is less than 30°, it may be difficult to backflush the material adhering inside the first conveying pipe 121 into the crystallization separator 110. Furthermore, when the angle θ between the first conveying pipe 121 and the vertical plane is less than or equal to 60°, it avoids the situation where material remains in the first conveying pipe 121 when the tilt angle of the first conveying pipe 121 is relatively gentle. This also reduces the situation where the crystallized salt is difficult to fall directly from the discharge end 111 of the crystallization separator 110 into the centrifuge 140 under the action of its own gravity, resulting in better technical effects. For example, the angle θ between the first conveying pipe 121 and the vertical plane can be any value between 30° and 60°, where θ can be 30°, 40°, 45°, 55°, or 60°.
[0047] In one embodiment, alternatively, referencing Figure 1As shown, the crystal slurry circulation MVR device 100 also includes a forced circulation pump 160 and an evaporator 170. The crystallization separator 110 is also provided with a first connection end 112 and a second connection end 113. The first connection end 112 of the crystallization separator 110 is connected to one end of the evaporator 170 through the forced circulation pump 160. The end of the evaporator 170 away from the forced circulation pump 160 is connected to the second connection end 113 of the crystallization separator 110. The evaporator 170 is used to heat the material. The material flowing in the tube side of the evaporator 170 exchanges heat with the steam. The forced circulation pump 160 is used to drive the material to circulate between the evaporator 170 and the crystallization separator 110.
[0048] Optionally, such as Figure 2 As shown, the storage unit 150 includes a mother liquor tank 151 and a mother liquor pump 152. The input end of the mother liquor tank 151 is connected to the second output port 142, and the output end of the mother liquor tank 151 is connected to the input end of the crystallization separator 110 through the mother liquor pump 152. The mother liquor tank 151 is used to store and buffer the mother liquor, and the mother liquor pump 152 is used to pump the mother liquor in the mother liquor tank 151 into the crystallization separator 110 to facilitate continued crystallization. The mother liquor tank 151 and the crystallization separator 110 form a circulation loop to improve crystallization efficiency.
[0049] Optionally, refer to Figure 1 and Figure 2 As shown, the storage unit 150 also includes a second backflushing assembly 154 and a second feed pipe 153. The two ends of the second feed pipe 153 are respectively connected to the mother liquor pump 152 and the input end of the crystallization separator 110. The second backflushing assembly 154 is connected to the second feed pipe 153 and is located between the input end of the mother liquor pump 152 and the crystallization separator 110. When the second feed pipe 153 is blocked, the second backflushing assembly 154 clears the second feed pipe 153 and backflushes the blocked material into the crystallization separator 110, preventing the second feed pipe 153 from being blocked by crystalline salt with mother liquor residue.
[0050] Optionally, the second backflushing assembly 154 includes a second backflushing member 1541 and a second cleaning member 1542. The second backflushing member 1541 and the second cleaning member 1542 are arranged side by side. The second backflushing member 1541 is connected to the second conveying pipe 153, and the second cleaning member 1542 is connected to the second conveying pipe 153. The second cleaning member 1542 is used to convey high-temperature steam to melt or soften the crystalline salt adhering to the inner wall of the first conveying pipe 121. The second backflushing member 1541 can also be conveyed to the first conveying pipe 121 through a medium to clean the material adhering to the inner wall of the second conveying pipe 153 and carry out the loosened and softened material.
[0051] In one embodiment, the crystal slurry circulation MVR device 100 may optionally include a steam compressor connected to the crystallization separator 110. The steam compressor is used to pressurize and heat the steam and deliver it to the crystallization separator 110. The steam compressor sends the compressed steam back to the heater as a heating source to provide heat for the evaporation of the material and realize the recycling of steam energy.
[0052] Optionally, the crystal slurry circulation MVR device 100 also includes a preheating element connected to the crystallization separation element 110. The preheating element is used to preheat the feed material, for example, by exchanging heat with steam condensate or compressed steam to raise the temperature of high-concentration salt solution or wastewater to near the boiling point, thereby reducing the energy consumption of subsequent heating. After the material is heated by the preheater, it enters the crystallization separation element 110. The secondary steam generated by evaporation is separated and purified before entering the steam compressor. The compressed steam provides heat to the preheater and heater again, forming a closed loop.
[0053] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.
[0054] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A crystal slurry circulation MVR device, characterized in that, include: Crystallization separation component; The feeding assembly includes a first feeding pipe, a first valve, and a second valve. One end of the first feeding pipe is connected to the feeding end of the crystallization separator. The first valve and the second valve are respectively disposed at opposite ends of the first feeding pipe. A first backflush assembly is connected to the first feed pipe and is located between the first valve and the second valve. The centrifuge has an input end connected to the end of the first feed pipe away from the crystallization separator, and the height of the input end of the centrifuge is less than the height of the discharge end of the crystallization separator. The centrifuge is provided with a first output port and a second output port, and the first output port is used to communicate with the outside. The storage device has its input end connected to the second output port and its output end connected to the input end pipeline of the crystallization separation device.
2. The slurry circulation MVR device according to claim 1, characterized in that, The first backflush assembly includes a first backflush member, which is connected to the first feed pipe.
3. The slurry circulation MVR device according to claim 2, characterized in that, The first backflushing assembly further includes a first cleaning component, which is connected to the first conveying pipe and is arranged side by side with the first backflushing component.
4. The slurry circulation MVR device according to claim 1, characterized in that, The angle between the first conveying pipe and the vertical plane is θ, which satisfies 30°≤θ≤60°.
5. The slurry circulation MVR device according to claim 1, characterized in that, It also includes a forced circulation pump and an evaporator. The crystallization separator is further provided with a first connection end and a second connection end. The first connection end of the crystallization separator is connected to one end of the evaporator through the forced circulation pump, and the end of the evaporator away from the forced circulation pump is connected to the second connection end of the crystallization separator.
6. The slurry circulation MVR device according to claim 1, characterized in that, The storage device includes a mother liquor tank and a mother liquor pump. The input end of the mother liquor tank is connected to the second output port, and the output end of the mother liquor tank is connected to the input end of the crystallization separation device through the mother liquor pump.
7. The slurry circulation MVR device according to claim 6, characterized in that, The storage device further includes a second backflushing assembly and a second feed pipe. The two ends of the second feed pipe are respectively connected to the mother liquor pump and the input end of the crystallization separator. The second backflushing assembly is connected to the second feed pipe and is located between the mother liquor pump and the input end of the crystallization separator.
8. The slurry circulation MVR device according to claim 7, characterized in that, The second backflushing assembly includes a second backflushing member and a second cleaning member, which are arranged side by side. The second backflushing member is connected to the second conveying pipe, and the second cleaning member is also connected to the second conveying pipe.
9. The slurry circulation MVR apparatus according to any one of claims 1 to 8, characterized in that, It also includes a steam compressor, which is connected to the crystallization separator and is used to pressurize and heat steam and deliver it to the crystallization separator.
10. The slurry circulation MVR apparatus according to any one of claims 1 to 8, characterized in that, It also includes a preheating component, which is connected to the crystallization separation component.