Wastewater recycling treatment device in salt extraction process

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a wastewater recycling treatment device in a salt extraction process, which comprises a support and a filter device, the filter device is mounted on the support, one end of the filter device is connected with a wastewater inlet pipe, and the other end of the filter device is connected with a wastewater outlet pipe and a purified water outlet pipe. A backflow pipeline is arranged between the wastewater outlet pipe and the wastewater inlet pipe, the filtering device is composed of a plurality of groups of filter cartridges, the filter cartridges are arranged in the length direction of the wastewater inlet pipe, wastewater is filtered into concentrated water and purified water through the filter cartridges, the concentrated water flows out through the wastewater outlet pipe or is circularly filtered again through the backflow pipeline, and the purified water flows out through the purified water outlet pipe. The support is further provided with a plurality of sets of anti-toppling devices, the anti-toppling devices support the filter cartridge in the replacement and maintenance process, the wastewater recycling treatment device can efficiently treat wastewater generated in the salt extraction process, recycling of the wastewater is achieved, and production cost and environmental pollution are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a wastewater recycling treatment device in a salt extraction process. Background Art

[0002] With the rapid development of industry, the problem of wastewater treatment generated during salt extraction has become increasingly prominent. In traditional salt extraction processes, the discharge of large amounts of wastewater not only causes serious environmental pollution but also wastes precious water resources.

[0003] Currently, the main treatment methods for wastewater from salt extraction include chemical precipitation and ion exchange, but these methods often suffer from high costs and unstable results. Furthermore, the complex composition of salt extraction wastewater, which contains large amounts of pollutants such as salt, organic matter, and heavy metals, makes its treatment more difficult.

[0004] Reverse osmosis (RO) is a membrane separation technology driven by pressure differentials. Its core principle is that, under pressure exceeding the osmotic pressure of the solution, a solvent (usually water) passes through a semipermeable membrane, while the solute (primarily salt ions, etc.) is almost completely retained. The pore size of the RO membrane is extremely small, typically ranging from 0.0001 to 0.001 μm. This tiny pore size effectively blocks the passage of salt ions. RO technology offers numerous advantages for the reuse of saline wastewater. First, it can efficiently remove salt from wastewater, ensuring that the treated water meets reuse standards, such as those for industrial circulating cooling water. Second, RO technology is relatively energy-efficient. Although it requires a certain amount of pressure to drive the process, its energy consumption is lower than that of traditional evaporation and concentration technologies.

[0005] However, reverse osmosis technology mainly filters wastewater through reverse osmosis membranes. Due to the extremely small pore size of reverse osmosis membranes, while effectively filtering wastewater, they can also easily become clogged. Therefore, the filter cartridges need to be replaced in a timely manner to maintain high-efficiency filtration. However, during the process of removing the filter cartridges, the original supporting structure is destroyed. If there are no appropriate protective measures, the filter cartridges can easily fall over due to their own gravity or slight external force. Once fallen over, the filter cartridges themselves may be damaged, such as causing the filter membrane in the filter cartridge to rupture or the filter chamber to deform. It may also cause damage to surrounding pipes and other equipment.

[0006] In order to solve the problem of wastewater treatment in the salt extraction process, realize the reuse of wastewater, reduce production costs and environmental pollution, there is an urgent need for a wastewater reuse treatment device that can efficiently and stably remove pollutants in wastewater, improve the convenience and safety of filter cartridge replacement, and at the same time ensure that the treated water quality meets the requirements of the salt extraction process and realize the recycling of water resources. Utility Model Content

[0007] In response to existing technical problems, the present utility model aims to provide a wastewater reuse treatment device in the salt extraction process, which filters the wastewater through a filtering device, and multiple filter cartridges work together to increase the filtering area and processing capacity, and can more effectively separate the wastewater into concentrated water and clean water. In addition, an anti-dumping device is added. During the maintenance and replacement of the filter cartridge, the anti-dumping device effectively limits the filter cartridge, preventing the filter cartridge from tipping over due to its own gravity or slight external force, avoiding damage to the filter cartridge and damage to surrounding pipes and equipment, and ensuring the safety of workers. The wastewater reuse treatment device in the salt extraction process provided by the present utility model can efficiently treat the wastewater generated in the salt extraction process, realize the reuse of wastewater, and reduce production costs and environmental pollution. At the same time, the device has the advantages of reasonable structure, easy operation, and strong versatility, providing strong technical support for the sustainable development of the salt extraction industry.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A wastewater recycling treatment device in a salt extraction process, comprising:

[0010] bracket and filter device;

[0011] The filter device is mounted on the bracket, one end of the filter device is connected to a wastewater inlet pipe, the other end of the filter device is connected to a wastewater outlet pipe and a clean water outlet pipe, and a return pipe is provided between the wastewater outlet pipe and the wastewater inlet pipe;

[0012] The filtering device is composed of a plurality of filter cartridges arranged along the length of the wastewater inlet pipe. The wastewater is filtered into concentrated water and clean water through the filter cartridges. The concentrated water flows out through the wastewater outlet pipe or is recirculated and filtered through the return pipe. The clean water flows out through the clean water outlet pipe.

[0013] The bracket is also provided with several groups of anti-dumping devices, and the filter cartridges are provided in one-to-one correspondence with the anti-dumping devices. The anti-dumping devices limit the filter cartridges. During the replacement and maintenance process, the anti-dumping devices support the filter cartridges.

[0014] As an improvement, the filter cartridge includes a filter bin, a filter element and an interface assembly. The filter element is arranged in the inner cavity of the filter bin. The filter element is arranged in a barrel shape. The filter element separates the filter bin into a wastewater area and a clean water area. The wastewater area is connected to the wastewater inlet pipe and the wastewater outlet pipe, and the clean water area is connected to the clean water outlet pipe. The interface assembly is sleeved on both ends of the filter bin, and the interface assembly is sealed and connected to the filter bin.

[0015] As an improvement, the interface assembly includes a connecting pipe, a pipe joint and a fastener that are sleeved on both ends of the filter bin. The connecting pipe is sealed and connected to the filter bin, and the connecting pipe and the pipe joint are tightly connected through the fastener.

[0016] As an improvement, the anti-dumping device includes a saddle and a protective plate. The saddle is installed on the bracket. The saddle is arranged at both ends of the protective plate. The saddle is concave. The concave surface of the saddle is contoured with the side wall of the filter cartridge. The protective plate is in a "X" shape. The protective plate cooperates with the saddle to fix and limit the filter cartridge.

[0017] As an improvement, the saddle is divided into a first saddle and a second saddle;

[0018] The first saddle is connected to the protective plate via a first connecting plate, the first connecting plate being fixedly disposed on both sides of the protective plate, the first connecting plate being provided with a first sliding groove, and the first saddle being slidably connected to the first connecting plate via bolts;

[0019] The second saddle is connected to the protective plate through a second connecting plate, the second connecting plate is fixedly arranged on both sides of the protective plate, a second sliding groove is opened on the second connecting plate, and the second saddle is slidably connected to the second connecting plate through bolts.

[0020] As an improvement, the first connecting plate and the first sliding groove are arranged in an arc shape, and the second connecting plate and the second sliding groove are arranged horizontally.

[0021] As an improvement, valves are provided on the wastewater inlet pipe, wastewater outlet pipe and clean water outlet pipe.

[0022] The beneficial effects of the present invention are:

[0023] (1) The utility model not only increases the filtration area but also realizes parallel filtration by setting a filtration device composed of multiple filter cartridges, which means that more wastewater can be processed in the same time. The setting of the return pipe allows the concentrated water that has not been completely filtered to return to the filtration system for re-filtration, which can make full use of the filtration capacity of the filtration device and improve the overall treatment efficiency of the wastewater. The design of the filter cartridges arranged along the length of the wastewater inlet pipe allows the wastewater to be more evenly distributed to each filter cartridge when flowing through the filtration device, avoiding the situation where the local filtration pressure is too large or too small, and further improving the filtration efficiency. At the same time, through continuous circulation filtration, the pollutant content in the concentrated water can be gradually reduced until it meets the standard for discharge or reuse;

[0024] (2) The barrel-shaped filter element in the present invention divides the filter chamber into a wastewater area and a clean water area. This clear partition can effectively prevent the filtered clean water from being contaminated again by unfiltered wastewater. During the filtration process, even if the pressure in the wastewater area changes, it will not affect the water quality in the clean water area, ensuring the stability of the clean water. The sealed connection between the interface component and the filter chamber not only prevents wastewater leakage, but also prevents external impurities from entering the filtration system, which is crucial for ensuring the quality of the clean water after filtration. If the interface is not sealed tightly, dust, bacteria and other pollutants in the air may enter the filter cartridge, thereby affecting the purity of the clean water.

[0025] (3) The saddle and the protective plate in the anti-dumping device of the utility model cooperate to form an all-round limit and support for the filter cartridge. When repairing and replacing the filter cartridge, even if the operator accidentally touches the filter cartridge, the anti-dumping device can effectively prevent the filter cartridge from tipping over, avoiding problems such as filter membrane rupture and filter chamber deformation that may be caused by filter cartridge damage. At the same time, it also protects the surrounding pipes and equipment from damage. The arc and horizontal settings of the first saddle and the second saddle and the corresponding connecting plate can be adjusted according to the specific shape and size of the filter cartridge to adapt to different types of filter cartridges. This not only improves the versatility of the device, but also ensures a higher fit between the anti-dumping device and the filter cartridge, further enhancing the stability and safety of the device.

[0026] (4) The valves on the wastewater inlet pipe, wastewater outlet pipe and clean water outlet pipe in the utility model can accurately control the on-off and flow rate of the water flow. When the device is started and stopped, the operator can slowly adjust the water flow through the valve to avoid damage to the filter device and pipeline caused by the impact of the water flow. During maintenance, closing the corresponding valve can facilitate the inspection or replacement of specific parts without affecting the operation of other parts of the entire device.

[0027] In summary, the utility model has the advantages of efficient treatment, high-quality water purification, stability and safety, and convenient operation, and is particularly suitable for the field of wastewater recovery technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of the wastewater recovery and treatment device of the utility model;

[0029] Figure 2 This is a schematic diagram of the three-dimensional structure of the anti-dumping device of the utility model;

[0030] Figure 3 This is a schematic diagram of the locking three-dimensional structure of the anti-dumping device of the utility model;

[0031] Figure 4 This is a partial schematic diagram of the three-dimensional structure of the filter cartridge of the utility model;

[0032] Figure 5This is an enlarged view of the structure at A;

[0033] Figure 6 This is a schematic diagram of the cross-sectional structure of the filter cartridge of the utility model;

[0034] Figure 7 It is a schematic diagram of the three-dimensional structure of the anti-dumping device of the utility model. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0038] Example:

[0039] like Figure 1-Figure 7 As shown, a wastewater recycling treatment device in a salt extraction process includes:

[0040] Support 1 and filter device 2;

[0041] The filter device 2 is mounted on the bracket 1. The bracket 1 provides a stable support structure for the entire device, ensuring that the filter device 2 and other components do not shake or tilt during operation. One end of the filter device 2 is connected to a wastewater inlet pipe 3, through which wastewater is introduced into the filter device 2. The other end of the filter device 2 is connected to a wastewater outlet pipe 4 and a clean water outlet pipe 5. A reflux pipe is provided between the wastewater outlet pipe 4 and the wastewater inlet pipe 3.

[0042] The filtering device 2 is composed of a plurality of groups of filter cartridges 21, which are arranged along the length direction of the wastewater inlet pipe 3. On the one hand, this arrangement can make full use of space. On the other hand, this arrangement can make the wastewater flow through each filter cartridge 21 more evenly, thereby improving the filtering effect. The wastewater is filtered into concentrated water and clean water through the filter cartridges 21. The concentrated water flows out through the wastewater outlet pipe 4 or is recirculated and filtered through the return pipe. The clean water flows out through the clean water outlet pipe 5. After being processed by the filtering device 2, the degree of salt removal in the clean water is very impressive, with a removal rate of more than 90%;

[0043] The bracket 1 is also provided with several groups of anti-dumping devices 6, and the filter cartridges 21 are arranged in a one-to-one correspondence with the anti-dumping devices 6. The anti-dumping devices 6 limit the filter cartridges 21. During the replacement and maintenance process, the anti-dumping devices 6 support the filter cartridges 21 to ensure that the filter cartridges 21 will not accidentally dump during operation, thereby avoiding damage to the filter cartridges 21 themselves and the surrounding equipment and pipelines. At the same time, this one-to-one setting method also ensures that each filter cartridge 21 can be fully protected, thereby improving the safety and reliability of the device.

[0044] It should be noted that a booster device is provided at the connection between the wastewater inlet pipe 3 and the filter device 2. The reverse osmosis membrane needs to be under a pressure higher than the osmotic pressure of the solution in order for the solvent to pass through the membrane and intercept the solute. The booster device can increase the pressure of the wastewater to a level that meets the working requirements of the filter device, thereby ensuring the efficient implementation of the filtration process.

[0045] The filter cartridge 21 includes a filter chamber 211, a filter element 212 and an interface assembly 213. The filter element 212 is arranged in the inner cavity of the filter chamber 211. The filter chamber 211 serves as the main structure of the filter cartridge 21 and provides a space for installation and support of the filter element 212 and the interface assembly 213. The filter chamber 211 is usually made of a strong and durable material and can withstand a certain pressure and water flow impact. The filter element 212 is arranged in a barrel shape. The filter element 212 divides the filter chamber 211 into The wastewater area 2121 is connected to the wastewater inlet pipe 3 and the wastewater outlet pipe 4, and the clean water area 2122 is connected to the clean water outlet pipe 5. After filtering by the filter element 212, impurities such as large molecular organic matter, colloids, and bacteria are intercepted, while small molecular substances and water pass through the filter element 212 and enter the clean water area 2122. The treated clean water flows out from the clean water outlet pipe 5, thereby achieving purification and reuse of wastewater.

[0046] The interface assembly 213 is sleeved on both ends of the filter chamber 211 , and the interface assembly 213 is sealed to the filter chamber 211 . The sealed connection can prevent wastewater from leaking from the interface during the filtration process, thereby ensuring the stability and reliability of the filtration process.

[0047] It should be noted that the barrel-shaped filter element 212 can increase the filtration area and improve the filtration efficiency. When the wastewater flows through the filter element 212, the contact area with the filter element 212 is larger, so that during the filtration process, the filtration load of each part of the filter element is relatively more uniform, which helps to improve the stability and consistency of the filtration. During long-term operation, the filter element will not be prematurely blocked or damaged due to excessive local filtration. At the same time, the stability of the water quality in the entire filtration process can also be guaranteed. In addition, when the contact area increases, the contact opportunities between water molecules and the semipermeable membrane increase, which is more conducive to the penetration of water molecules. At the same time, the solutes are more concentratedly blocked on one side of the membrane. This enhancement of material transfer helps to improve the efficiency and separation effect of reverse osmosis.

[0048] Furthermore, the interface assembly 213 includes a connecting pipe 2131, a pipe joint 2132 and a fastener 2133 which are sleeved on both ends of the filter chamber 211. The connecting pipe 2131 is sealed and connected to the filter chamber 211 to prevent wastewater from leaking at the interface and ensure the smooth progress of the filtration process. The pipe joint 2132 is used to connect the external pipe of the filtration device. The connecting pipe 2131 and the pipe joint 2132 are tightly connected through the fastener 2133. The fastener 2133 is preferably a clamp, which provides sufficient fastening force to prevent the connection part from loosening.

[0049] In addition, the anti-dumping device 6 includes a saddle 61 and a protective plate 62. The saddle 61 is mounted on the bracket 1 and is disposed at both ends of the protective plate 62. The saddle 61 is concave, and the concave surface of the saddle 61 is contoured to the sidewall of the filter cartridge 21. The concave saddle 61 can better fit the sidewall of the filter cartridge 21, increasing the contact area and improving support stability. Secondly, the contoured design ensures a tighter fit between the saddle 61 and the filter cartridge 21, reducing the shaking and displacement of the filter cartridge 21 on the saddle 61, further reducing the risk of the filter cartridge 21 tipping over.

[0050] The protective plate 62 is arranged in an "X" shape, and the protective plate 62 cooperates with the saddle 61 to fix and limit the filter cartridge 21. The protective plate 62 has high strength and stability. The "X"-shaped protective plate 62 surrounds the side of the filter cartridge 21 and can support the filter cartridge 21 when the filter cartridge 21 is repaired and replaced, effectively preventing the filter cartridge 21 from tipping over when subjected to external force.

[0051] Furthermore, the saddle 61 is divided into a first saddle 611 and a second saddle 612;

[0052] The first saddle 611 is connected to the protective plate 62 via a first connecting plate 63. The first connecting plate 63 is fixedly disposed on both sides of the protective plate 62. A first sliding groove 631 is formed on the first connecting plate 63. The first saddle 611 is slidably connected to the first connecting plate 63 via bolts.

[0053] The second saddle 612 is connected to the protective plate 62 through a second connecting plate 64. The second connecting plate 64 is fixedly arranged on both sides of the protective plate 62. A second sliding groove 641 is opened on the second connecting plate 64. The second saddle 612 is slidably connected to the second connecting plate 64 through bolts.

[0054] Among them, the first saddle 611 and the second saddle 612 are slidably connected by bolts, and the bolt connection is more adjustable to a certain extent. During the installation and adjustment process, the positions of the first saddle 611 and the second saddle 612 in the corresponding slide grooves can be easily adjusted by properly loosening or tightening the bolts, so that the anti-dumping device can be compatible with filter cartridges 21 of different specifications. In addition, the bolts can withstand large tensile and shear forces, which enables the saddle to support the filter cartridge 21. Even if the filter cartridge 21 is subjected to large gravity, vibration or other external forces, the connection part can remain stable and will not easily loosen or separate. When the filter cartridge 21 needs to be repaired and replaced or the anti-dumping device needs to be repaired, the bolts can be unscrewed with simple tools, and the relevant components can be quickly disassembled.

[0055] Furthermore, the first connecting plate 63 and the first slide groove 631 are arranged in an arc shape, and the second connecting plate 64 and the second slide groove 641 are arranged horizontally. The different settings of the first connecting plate 63, the first slide groove 631, the second connecting plate 64 and the second slide groove 641 cooperate with each other to form a more stable and comprehensive support system. The arc-shaped first connecting plate 63 and the first slide groove 631 mainly provide support and force dispersion in the vertical direction and a certain degree of circumferential direction, while the horizontally arranged second connecting plate 64 and the second slide groove 641 focus on limiting the displacement of the filter cartridge 21 in the horizontal direction and providing stable supporting force. The two work together to fix and limit the filter cartridge 21 from multiple directions, greatly improving the stability and reliability of the entire anti-dumping device.

[0056] It should be noted that valves 31 are provided on the wastewater inlet pipe 3, the wastewater outlet pipe 4 and the clean water outlet pipe 5. The valve on the wastewater inlet pipe 3 can control the flow rate and on-off of the wastewater entering the filter device 2. When the device is started, the valve can be slowly opened to allow the wastewater to enter the filter device 2 at an appropriate flow rate to avoid damage to the filter cartridge 21 due to excessive water flow impact. When the device needs to be repaired or a fault occurs, the valve can be closed in time to prevent the wastewater from continuing to flow in, which is convenient for maintenance work.

[0057] The valve on the wastewater outlet pipe 4 can control the outflow of concentrated water. If the concentrated water needs to be further processed or recirculated for filtration, the opening of the valve can be adjusted to control the flow rate of the concentrated water. At the same time, when the device stops running, closing the valve can prevent the concentrated water from flowing back and protect the filtration device.

[0058] The valve on the clean water outlet pipe 5 can control the outflow of clean water. The opening of the valve can be adjusted according to actual needs to control the flow and direction of the clean water, and the clean water can be transported to a specific reuse link or storage facility.

[0059] Among them, the valve 31 is preferably an automatic valve. The automatic valve can be remotely operated and automatically controlled through a control system, which improves the degree of automation of the device. The valve opening can be automatically adjusted according to a preset program to adapt to different working conditions and processing requirements. In an emergency, the automatic valve can respond quickly and close the corresponding pipeline to ensure the safe operation of the device. In addition, the automatic valve has high accuracy and reliability, can accurately control the water flow, and reduce errors in human operation.

[0060] Working process: Connect the wastewater inlet pipe, wastewater outlet pipe, and clean water outlet pipe to the corresponding water source and drainage system respectively, and check the sealing of each pipe connection. Adjust the anti-dumping device so that the position of the saddle and the filter cartridge 21 correspond to each other, ensuring that it can effectively limit and support the filter cartridge 21 during operation.

[0061] Wastewater flows into the filtration device through the wastewater inlet pipe. Under pressure, the wastewater is evenly distributed to each filter cartridge 21 along the length of the wastewater inlet pipe. Wastewater entering the filter cartridge 21 first enters the wastewater area of ​​the filter chamber. Here, the wastewater comes into contact with the filter element. Due to the barrel-shaped configuration of the filter element, the filter chamber is divided into a wastewater area and a clean water area. The wastewater begins to be filtered under the action of the filter element. The screening effect of the filter membrane begins to take effect, and impurities such as large molecular organic matter, colloids, and bacteria are trapped in the wastewater area, while small molecular substances and water pass through the filter element into the clean water area. The filtered concentrated water flows out of the wastewater area through the wastewater outlet pipe. If the concentrated water does not meet the discharge or reuse standards, it can be returned to the filtration device through the reflux pipe for re-filtration to improve wastewater treatment efficiency and resource utilization. At the same time, the clean water in the clean water area flows out through the clean water outlet pipe and can be reused or further processed.

[0062] When the filter cartridge 21 needs to be repaired or replaced, first close the corresponding valve to stop the inflow and outflow of wastewater. The operator can carefully remove the filter cartridge 21 from the filter device. In this process, the anti-dumping device plays an important role in preventing the filter cartridge 21 from tipping over due to its own gravity or slight external force. Inspect and repair the removed filter cartridge 21. If the filter element needs to be replaced, the old filter element can be removed and a new one installed. At the same time, check the sealing of the interface assembly and replace the seal if necessary. After the repair or replacement is completed, reinstall the filter cartridge 21 back into the filter device and adjust the anti-dumping device to ensure that the saddle fits tightly against the filter cartridge 21. Then open the valve to restore the inflow and outflow of wastewater, and the device continues to treat wastewater.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wastewater recycling treatment device in a salt extraction process, characterized in that: include: A support (1) and a filter device (2); The filter device (2) is mounted on the bracket (1), one end of the filter device (2) is connected to a wastewater inlet pipe (3), the other end of the filter device (2) is connected to a wastewater outlet pipe (4) and a clean water outlet pipe (5), and a return pipe is provided between the wastewater outlet pipe (4) and the wastewater inlet pipe (3); The filtering device (2) is composed of a plurality of filter cartridges (21), and the filter cartridges (21) are arranged along the length direction of the wastewater inlet pipe (3). The wastewater is filtered into concentrated water and clean water through the filter cartridges (21). The concentrated water flows out through the wastewater outlet pipe (4) or is recirculated and filtered through the return pipe, and the clean water flows out through the clean water outlet pipe (5). The bracket (1) is further provided with a plurality of anti-dumping devices (6), and the filter cartridge (21) and the anti-dumping devices (6) are provided in a one-to-one correspondence. The anti-dumping devices (6) serve to limit the position of the filter cartridge (21). During the replacement and maintenance process, the anti-dumping devices (6) support the filter cartridge (21).

2. The wastewater recycling treatment device in a salt extraction process according to claim 1, characterized in that: The filter cartridge (21) comprises a filter chamber (211), a filter element (212) and an interface assembly (213); the filter element (212) is arranged in the inner cavity of the filter chamber (211); the filter element (212) is arranged in a barrel shape; the filter element (212) divides the filter chamber (211) into a wastewater area (2121) and a clean water area (2122); the wastewater area (2121) is connected to the wastewater inlet pipe (3) and the wastewater outlet pipe (4); the clean water area (2122) is connected to the clean water outlet pipe (5); the interface assembly (213) is sleeved on both ends of the filter chamber (211); and the interface assembly (213) is sealed and connected to the filter chamber (211).

3. The wastewater recycling treatment device in a salt extraction process according to claim 2, characterized in that: The interface assembly (213) comprises a connecting pipe (2131), a pipe joint (2132) and a fastener (2133) sleeved on both ends of the filter bin (211); the connecting pipe (2131) is sealedly connected to the filter bin (211); and the connecting pipe (2131) and the pipe joint (2132) are tightly connected via the fastener (2133).

4. The wastewater recycling treatment device in a salt extraction process according to claim 1, characterized in that: The anti-dumping device (6) comprises a saddle (61) and a protective plate (62), wherein the saddle (61) is mounted on the bracket (1), and the saddle (61) is arranged at both ends of the protective plate (62), the saddle (61) is concave, and the concave surface of the saddle (61) is in the same shape as the side wall of the filter cartridge (21), and the protective plate (62) is arranged in a "F" shape, and the protective plate (62) cooperates with the saddle (61) to fix and limit the filter cartridge (21).

5. The wastewater recycling treatment device in a salt extraction process according to claim 4 is characterized in that: The saddle (61) is divided into a first saddle (611) and a second saddle (612); The first saddle (611) is connected to the protective plate (62) via a first connecting plate (63), the first connecting plate (63) is fixedly arranged on both sides of the protective plate (62), a first sliding groove (631) is provided on the first connecting plate (63), and the first saddle (611) is slidably connected to the first connecting plate (63) via bolts; The second saddle (612) is connected to the protective plate (62) via a second connecting plate (64). The second connecting plate (64) is fixedly arranged on both sides of the protective plate (62). A second sliding groove (641) is provided on the second connecting plate (64). The second saddle (612) is slidably connected to the second connecting plate (64) via bolts.

6. The wastewater recycling treatment device in a salt extraction process according to claim 5, characterized in that: The first connecting plate (63) and the first sliding groove (631) are arranged in an arc shape, and the second connecting plate (64) and the second sliding groove (641) are arranged horizontally.

7. The wastewater recycling treatment device in a salt extraction process according to claim 1, characterized in that: Valves (31) are provided on the wastewater inlet pipe (3), the wastewater outlet pipe (4) and the clean water outlet pipe (5).

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