Recovery treatment device for salt-containing dye wastewater

Abstract

The utility model provides a recovery treatment device for salt-containing dye wastewater, which comprises an ultrafiltration membrane filtering device and a recovery pipeline, and is characterized in that an ultrafiltration membrane is arranged in the ultrafiltration membrane filtering device; the first differential pressure switch is connected with the ultrafiltration membrane and is used for detecting the differential pressure of the two sides of the ultrafiltration membrane; the electrodialysis treatment device is connected with the ultrafiltration membrane filtering device through a pipeline and is used for carrying out electrodialysis treatment on produced water filtered by the ultrafiltration membrane filtering device; a plurality of small chambers are arranged in the electrodialysis treatment device and comprise a fresh water chamber and a concentrated water chamber, the fresh water chamber is used for storing low-concentration salt-containing wastewater, and the concentrated water chamber is used for storing high-concentration salt-containing wastewater; the evaporation chamber is connected with the concentrated water chamber of the electrodialysis treatment device and is used for carrying out evaporation crystallization treatment on the high-concentration salt-containing wastewater. According to the recovery treatment device for the salt-containing dye wastewater, the evaporation process is more efficient and energy-saving, and the recovery rate of inorganic salt is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dye wastewater treatment equipment, in particular to a recovery and treatment device for saline dye wastewater. Background Technique

[0002] After passing through a brine separation device, dyes will generate a large amount of saline wastewater. Due to the high toxicity of synthetic dyes, the saline wastewater will cause the receiving water body to change color, hinder the penetration of visible light, and has carcinogenic, mutagenic and teratogenic properties, producing toxic effects on plants, animals and humans.

[0003] Currently, for such wastewater, biochemical treatment is often carried out. However, this instead increases the treatment difficulty and cost of saline wastewater, and at the same time, the inorganic salts in the saline wastewater cannot be recovered, resulting in a large waste of dye resources. Content of the Utility Model

[0004] In view of this, the utility model aims to provide a recovery and treatment device for saline dye wastewater to solve the problems of high treatment difficulty and high cost of saline wastewater, and at the same time, the inorganic salts in the saline wastewater cannot be recovered, resulting in a large waste of dye resources.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] The utility model provides a recovery and treatment device for saline dye wastewater, including an ultrafiltration membrane filtration device 1, a first pressure difference switch 2, an electrodialysis treatment device 3, and an evaporation chamber 4; the ultrafiltration membrane filtration device 1 is used for filtering saline dye wastewater, and an ultrafiltration membrane 103 is arranged therein and is arranged in a recovery pipeline 5, and the ultrafiltration membrane filtration device 1 is provided with a water inlet end 101 and a water outlet end 102; the first pressure difference switch 2 is connected to the ultrafiltration membrane 103 and is used for detecting the pressure difference on both sides of the ultrafiltration membrane; the electrodialysis treatment device 3 is connected to the water outlet end 102 through a pipeline and is used for performing electrodialysis treatment on the material filtered by the ultrafiltration membrane filtration device; several chambers are arranged in the electrodialysis treatment device 3, including a fresh water chamber 301 and a concentrated water chamber 302; the fresh water chamber 301 is used for storing low-concentration saline wastewater, and the concentrated water chamber 302 is used for storing high-concentration saline wastewater; the evaporation chamber 4 is connected to the concentrated water chamber 302 of the electrodialysis treatment device 3 and performs evaporation crystallization treatment on the high-concentration saline wastewater.

[0007] Further, both the water inlet end 101 and the water outlet end 102 are connected to a cleaning device. A normal flushing device is provided at the water inlet end 101, and a backwashing device is provided at the water outlet end 102. Both the normal flushing device and the backwashing device are connected to the first differential pressure switch 2. A first solenoid valve 104 is provided at the water inlet end 101, and a second solenoid valve 107 is provided at the water outlet end 102. The second solenoid valve 107 is provided between the ultrafiltration membrane filtration device 1 and the electrodialysis treatment device 3.

[0008] Further, the normal flushing device includes a first cleaning pump 105, a water tank 6, and a third solenoid valve 108. The first cleaning pump 105 is arranged on the pipeline connecting the water inlet end 101 and the water tank 6 and is close to the water tank 6. The third solenoid valve 108 is arranged on the pipeline connecting the water inlet end 101 and the water tank 6 and is close to the water inlet end 101.

[0009] The backwashing device includes a second cleaning pump 106, a water tank 6, and a fourth solenoid valve 109. The second cleaning pump 106 is arranged on the pipeline connecting the water outlet end 102 and the water tank 6 and is close to the water tank 6. The fourth solenoid valve 109 is arranged on the pipeline connecting the water outlet end 102 and the water tank 6 and is close to the water outlet end 102.

[0010] Further, the evaporation chamber 4 includes an evaporation chamber shell, a stirring device, a transmission device, a vacuum pump 410, and a pressure sensor 413.

[0011] The evaporation chamber shell is used to install various components, and it includes an evaporation chamber left cover 401, an evaporation chamber right chamber 415, a water inlet 408, and a crystal discharge port 416. The evaporation chamber left cover 401 is fastened to the evaporation chamber right chamber 415 by bolts. A fifth solenoid valve 409 is provided at the water inlet 408, and a sixth solenoid valve 414 is provided at the crystal discharge port 416. The evaporation chamber left cover 401 is divided into two parts. The part on the left is used to fix the transmission device, and the part on the right is used to be bolted to the evaporation chamber right chamber. These two parts are also fixedly connected by bolts.

[0012] The stirring device is connected to the evaporation chamber shell and is arranged inside the evaporation chamber shell. It is used to stir the wastewater in the evaporation chamber.

[0013] The transmission device is fixed on the evaporation chamber left cover 401 and is connected to the stirring device. It is used to provide power for the stirring device in the evaporation chamber. The vacuum pump 410 is fixed to the evaporation chamber right chamber 415 by bolts, and the pressure sensor 413 is fixed to the evaporation chamber right chamber 415 by bolts. It is used to detect the pressure condition in the evaporation chamber.

[0014] Further, the stirring device includes a left fixing seat 403, a right fixing seat 411, a stirring blade rod 412, and stirring blades 407. The left fixing seat 403 is fixed on the left cover 401 of the evaporation chamber through a bearing, and the right fixing seat 411 is fixed on the right inner wall of the right chamber 415 of the evaporation chamber through bolts. The stirring blade rod 412 is connected to the right fixing seat 411 through a bearing, and stirring blades 407 are provided thereon. The stirring blades 407 are used to stir the high-concentration saline wastewater.

[0015] Further, the transmission device includes a motor 406, a second gear shaft 405, and a first gear shaft 402. The motor 406 is fixed on the left cover 401 of the evaporation chamber through bolts. The second gear shaft 405 is connected to the motor 406 through a coupling, and the second gear shaft 405 is fixed to the left cover 401 of the evaporation chamber through a bearing. The second gear shaft 405 and the first gear shaft 402 are in meshing transmission, and the lower end of the first gear shaft 402 is connected to the stirring blade rod 412. The number of teeth of the first gear shaft 402 is greater than that of the second gear shaft 405.

[0016] Further, the first differential pressure switch 2 is respectively connected to a first solenoid valve 104, a second solenoid valve 107, a first cleaning pump 105, a third solenoid valve 108, a second cleaning pump 106, a fourth solenoid valve 109, and a delivery pump 110.

[0017] The delivery pump 110 is provided on the recovery pipeline 5 and is used to deliver the saline wastewater.

[0018] Further, a preheating chamber 404 is provided on the fifth solenoid valve 409. The preheating chamber 404 includes a heater and a temperature sensor. The heater preheats the high-concentration saline wastewater delivered into the preheating chamber, and the temperature sensor is used to detect the temperature of the high-concentration saline wastewater during preheating.

[0019] Further, the inner cavity of the left cover 401 of the evaporation chamber and the inner cavity of the right chamber 415 of the evaporation chamber are sealed and isolated.

[0020] Compared with the prior art, the recovery and treatment device for saline dye wastewater of the present utility model has the following advantages:

[0021] (1) The present utility model combines electrodialysis technology, ultrafiltration membrane filtration process, and evaporation crystallization, and adds a cleaning device for the ultrafiltration membrane and a device for reducing the energy consumption of the evaporation process to improve the recovery and treatment of the recovery and treatment device for saline dye wastewater for inorganic salts, reduce the pollution degree of the saline wastewater, extend the service life of the equipment, and improve the recovery rate of inorganic salts.

[0022] (2) The utility model sets up a forward flushing and reverse flushing device for the ultrafiltration membrane module, which is the most prone to clogging in the ultrafiltration membrane filtration device. It flushes the ultrafiltration membrane by pumping water from the water tank to achieve the effect of cleaning the ultrafiltration membrane. At the same time, the differential pressure switch is connected to the water pump and pipeline solenoid valve of the cleaning device to ensure that the cleaning process is carried out in a closed situation, improving the cleaning efficiency of the ultrafiltration membrane and preventing the bursting of the recovery pipeline.

[0023] (3) During the evaporation process of the utility model, the stirring blades are still constantly stirring, improving the evaporation efficiency and making the heat transfer more uniform. At the same time, stirring helps to form uniform crystals and avoid the formation of large crystals. During the evaporation process, scaling or coking may occur on the heating surface. Stirring can reduce this tendency and keep the heating surface clean to extend the service life of the evaporation chamber. The pressure in the evaporation chamber is detected by the pressure sensor to timely observe the pressure situation in the evaporation chamber, prevent the pressure in the evaporation chamber from being too high and damaging the device, and facilitate the workers to adjust the vacuum pump in time. Brief Description of the Drawings

[0024] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0025] In the drawings:

[0026] Figure 1 is the overall structural schematic diagram of the recovery and treatment device for saline dye wastewater described in the embodiment of the present utility model;

[0027] Figure 2 is the structural schematic diagram of the evaporation chamber in the recovery and treatment device for saline dye wastewater described in the embodiment of the present utility model;

[0028] Description of the Reference Numerals in the Drawings:

[0029] 1. Ultrafiltration membrane filtration device; 2. First differential pressure switch; 3. Electrodialysis treatment device; 4. Evaporation chamber; 5. Recovery pipeline; 6. Water tank; 101. Inlet end; 102. Outlet end; 103. Ultrafiltration membrane; 104. First solenoid valve; 105. First cleaning pump; 106. Second cleaning pump; 107. Second solenoid valve; 108. Third solenoid valve; 109. Fourth solenoid valve; 110. Delivery pump; 301. Fresh water chamber; 302. Concentrated water chamber; 401. Left cover of the evaporation chamber; 402. First gear shaft; 403. Left fixing seat; 404. Preheating chamber; 405. Second gear shaft; 406. Motor; 407. Stirring blade; 408. Inlet; 409. Fifth solenoid valve; 410. Vacuum pump; 411. Right fixing seat; 412. Stirring blade rod; 413. Pressure sensor; 414. Sixth solenoid valve; 415. Right cavity of the evaporation chamber; 416. Crystal discharge port. Detailed implementation mode

[0030] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0033] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0034] Refer to Figure 1-2 As shown, it is the prior art that several small chambers in the electrodialysis treatment device 3 are separated by anion membranes and cation membranes. In the present utility model, for the convenience of representing the fresh water chamber and the concentrated water chamber, the electrodialysis treatment device is only divided into two parts: two concentrated water chambers and a fresh water chamber. In the present utility model, since a transmission device needs to be fixed inside the left cover of the evaporation chamber, and it is sealed and isolated from the inner cavity of the right chamber of the evaporation chamber, therefore, in Figure 2 the left cover of the evaporation chamber is represented by hatching as two parts. The part on the left is used to fix the transmission device, and the part on the right is used to be bolted to the right chamber of the evaporation chamber. These two parts are also fixedly connected by bolts. The ultrafiltration membrane filtration device in the present utility model is an existing filtration structure, so only a simple position is drawn and the original structure is not improved. The electrodialysis treatment device in the present utility model is also an existing electrodialysis product, so only a simple position and the situation of the device connected thereto are drawn.

[0035] The utility model provides a recovery and treatment device for saline dye wastewater, including an ultrafiltration membrane filtration device 1, a first differential pressure switch 2, an electrodialysis treatment device 3, and an evaporation chamber 4. The ultrafiltration membrane filtration device 1 is used for filtering saline dye wastewater. An ultrafiltration membrane 103 is arranged therein and is disposed in a recovery pipeline 5. The ultrafiltration membrane filtration device 1 is provided with a water inlet end 101 and a water outlet end 102. The first differential pressure switch 2 is connected to the ultrafiltration membrane 103 and is used for detecting the differential pressure on both sides of the ultrafiltration membrane. The electrodialysis treatment device 3 is connected to the water outlet end 102 through a pipeline and is used for performing electrodialysis treatment on the material filtered by the ultrafiltration membrane filtration device. A plurality of small chambers are arranged in the electrodialysis treatment device 3, including a fresh water chamber 301 and a concentrated water chamber 302. The fresh water chamber 301 is used for storing low-concentration saline wastewater, and the concentrated water chamber 302 is used for storing high-concentration saline wastewater. The evaporation chamber 4 is connected to the concentrated water chamber 302 of the electrodialysis treatment device 3 and performs evaporation crystallization treatment on the high-concentration saline wastewater.

[0036] In the recovery and treatment of saline dye wastewater, the application of electrodialysis technology does not require the use of chemical agents, does not produce secondary pollution, and has relatively low energy consumption, especially suitable for the treatment of high-salt wastewater. It can effectively remove inorganic salts in the wastewater and achieve desalination of the wastewater. The ultrafiltration membrane filtration process can allow small molecule substances and dissolved solids to pass through by utilizing the characteristics of various membranes, reduce the amount of wastewater entering the evaporation crystallization process finally, and effectively reduce the overall construction cost and operation cost.

[0037] Therefore, the utility model combines electrodialysis technology, ultrafiltration membrane filtration process, and evaporation crystallization, and adds a cleaning device for the ultrafiltration membrane and a device for reducing the energy consumption of the evaporation process therein to improve the recovery and treatment of inorganic salts by the recovery and treatment device for saline dye wastewater, reduce the pollution degree of saline wastewater, extend the service life of the equipment, and improve the recovery rate of inorganic salts.

[0038] Specifically, in this embodiment, both the water inlet end 101 and the water outlet end 102 are connected to a cleaning device. A forward flushing device is arranged at the water inlet end 101, and a backwashing device is arranged at the water outlet end 102. Both the forward flushing device and the backwashing device are connected to the first differential pressure switch 2. A first solenoid valve 104 is arranged at the water inlet end 101, and a second solenoid valve 107 is arranged at the water outlet end 102. The second solenoid valve 107 is arranged between the ultrafiltration membrane filtration device 1 and the electrodialysis treatment device 3.

[0039] Specifically, in this embodiment, the forward flushing device includes a first cleaning pump 105, a water tank 6, and a third solenoid valve 108. The first cleaning pump 105 is arranged on the pipeline connecting the water inlet end 101 and the water tank 6 and is close to the water tank 6. The third solenoid valve 108 is arranged on the pipeline connecting the water inlet end 101 and the water tank 6 and is close to the water inlet end 101. The backwashing device includes a second cleaning pump 106, a water tank 6, and a fourth solenoid valve 109. The second cleaning pump 106 is arranged on the pipeline connecting the water outlet end 102 and the water tank 6 and is close to the water tank 6. The fourth solenoid valve 109 is arranged on the pipeline connecting the water outlet end 102 and the water tank 6 and is close to the water outlet end 102.

[0040] The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are used to control the flow of the saline wastewater. The first solenoid valve and the second solenoid valve are normally open during the recovery process. The third solenoid valve and the fourth solenoid valve are normally closed during the recovery process. The first cleaning pump pumps the water in the water tank during the forward flushing process to perform forward flushing on the ultrafiltration membrane. The second cleaning pump pumps the water in the water tank during the backwashing process to perform backwashing on the ultrafiltration membrane.

[0041] The utility model provides a forward flushing device and a backwashing device for the ultrafiltration membrane module that is most likely to be blocked in the ultrafiltration membrane filtration device. By pumping water from the water tank to flush it, the ultrafiltration membrane can be cleaned. At the same time, the differential pressure switch is connected to the water pump and the pipeline solenoid valve of the cleaning device to ensure that the cleaning process is carried out in a closed state, improving the cleaning efficiency of the ultrafiltration membrane.

[0042] Specifically, in this embodiment, the evaporation chamber 4 includes an evaporation chamber shell, a stirring device, a transmission device, a vacuum pump 410, and a pressure sensor 413. The evaporation chamber shell is used to install various components, which includes an evaporation chamber left cover 401, an evaporation chamber right cavity 415, a water inlet 408, and a crystal discharge port 416. The evaporation chamber left cover 401 is fastened to the evaporation chamber right cavity 415 by bolts. A fifth solenoid valve 409 is provided at the water inlet 408, and a sixth solenoid valve 414 is provided at the crystal discharge port 416. The evaporation chamber left cover 401 is divided into two parts. The part on the left is used to fix the transmission device, and the part on the right is used to be bolted to the evaporation chamber right cavity. These two parts are also fixedly connected by bolts. The stirring device is connected to the evaporation chamber shell and is arranged inside the evaporation chamber shell, and it is used to stir the wastewater in the evaporation chamber. The transmission device is fixed on the evaporation chamber left cover 401 and is connected to the stirring device, and it is used to provide power for the stirring device in the evaporation chamber. The vacuum pump 410 is fixed to the evaporation chamber right cavity 415 by bolts, and the pressure sensor 413 is fixed to the evaporation chamber right cavity 415 by bolts, and it is used to detect the pressure condition in the evaporation chamber.

[0043] Specifically, in this embodiment, the stirring device includes a left fixed seat 403, a right fixed seat 411, a stirring blade rod 412, and a stirring blade 407; the left fixed seat 403 is fixed on the left cover 401 of the evaporation chamber through a bearing, and the right fixed seat 411 is fixed on the right inner wall of the right chamber 415 of the evaporation chamber through bolts; the stirring blade rod 412 is connected to the right fixed seat 411 through a bearing, and the stirring blade 407 is provided thereon; the stirring blade 407 is used for stirring the high-concentration saline wastewater.

[0044] Specifically, in this embodiment, the transmission device includes a motor 406, a second gear shaft 405, and a first gear shaft 402; the motor 406 is fixed on the left cover 401 of the evaporation chamber through bolts, the second gear shaft 405 is connected to the motor 406 through a coupling, and the second gear shaft 405 is fixed to the left cover 401 of the evaporation chamber through a bearing; the second gear shaft 405 and the first gear shaft 402 are in meshing transmission, and the lower end of the first gear shaft 402 is connected to the stirring blade rod 412; the number of teeth of the first gear shaft 402 is greater than that of the second gear shaft 405.

[0045] Specifically, in this embodiment, the first differential pressure switch 2 is respectively connected to the first solenoid valve 104, the second solenoid valve 107, the first cleaning pump 105, the third solenoid valve 108, the second cleaning pump 106, the fourth solenoid valve 109, and the delivery pump 110; the delivery pump 110 is arranged on the recovery pipeline 5 and is used for delivering the saline wastewater.

[0046] The first differential pressure switch is connected to the ultrafiltration membrane to detect the differential pressure across the ultrafiltration membrane.

[0047] When the differential pressure across the ultrafiltration membrane is too high, the first differential pressure switch controls the first solenoid valve, the second solenoid valve, and the delivery pump to close, opens the fourth solenoid valve, and activates the second cleaning pump to backwash the ultrafiltration membrane. Until the backwashing is completed, the fourth solenoid valve and the second cleaning pump are closed, and then the third solenoid valve and the first cleaning pump are activated to forward wash the ultrafiltration membrane. When the differential pressure across the ultrafiltration membrane meets the requirements, the second cleaning pump and the fourth solenoid valve are closed, the first solenoid valve, the second solenoid valve, and the delivery pump are opened, and the wastewater in the recovery pipeline is transported again by the delivery pump.

[0048] The differential pressure switch in the present utility model can adjust the forward washing and backwashing equipment, ensure the extension of the service life of the ultrafiltration membrane, and at the same time prevent the bursting of the recovery pipeline.

[0049] Specifically, in this embodiment, a preheating chamber 404 is provided on the fifth solenoid valve 409. The preheating chamber 404 includes a heater and a temperature sensor. The heater preheats the high-concentration saline wastewater transported into the preheating chamber, and the temperature sensor is used to detect the temperature of the high-concentration saline wastewater during preheating.

[0050] In the present utility model, the high-concentration saline wastewater is heated through the preheating chamber, and the worker observes through the temperature displayed by the temperature sensor. After being heated to an appropriate temperature, the worker starts the motor, and the transmission device starts to operate. During the stirring process, to prevent a large number of bubbles from appearing, the stirring speed needs to be slow. Therefore, the number of teeth of the first gear shaft needs to be greater than that of the second gear shaft.

[0051] The worker opens the fifth solenoid valve. After the heated high-concentration saline wastewater completely flows into the right chamber of the evaporation chamber from the water inlet, the fifth solenoid valve is closed. The heated high-concentration saline wastewater is continuously stirred by the stirring blades, and the vacuum pump is turned on to reduce the pressure in the right chamber of the evaporation chamber. Under low-pressure conditions, the boiling point of the solution decreases, causing the high-concentration saline wastewater to continuously boil under low-pressure conditions, achieving the effect of self-evaporation without heating, making the evaporation process more efficient and energy-saving.

[0052] At the same time, during the evaporation process, the stirring blades are still continuously stirring, improving the evaporation efficiency and making the heat transfer more uniform. At the same time, stirring helps to form uniform crystals and avoid the formation of large crystals. During the evaporation process, scaling or coking may occur on the heating surface. Stirring can reduce this tendency and keep the heating surface clean to extend the service life of the evaporation chamber.

[0053] The pressure in the evaporation chamber can be detected by the pressure sensor to timely observe the pressure situation in the evaporation chamber, prevent the pressure in the evaporation chamber from being too high and damaging the device, and facilitate the worker to timely adjust the vacuum pump. When the evaporation process ends, opening the sixth solenoid valve at the crystal discharge port can discharge the crystallization product.

[0054] Specifically, in this embodiment, the inner cavity of the left cover 401 of the evaporation chamber and the inner cavity of the right chamber 415 of the evaporation chamber are sealed and isolated.

[0055] In the present utility model, the overall structure of the evaporation chamber isolates the main components of the transmission device from the inner cavity of the high-concentration saline wastewater in the right chamber of the evaporation chamber, preventing the wastewater from polluting the transmission device and extending the service life of the transmission device.

[0056] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for recovering and treating salt-containing dye wastewater, characterized in that: It comprises an ultrafiltration membrane filtering device (1), a first differential pressure switch (2), an electrodialysis treatment device (3), and an evaporation chamber (4); The ultrafiltration membrane filtration device (1) is used for filtering salt-containing dye wastewater, wherein an ultrafiltration membrane (103) is arranged therein and is arranged in a recovery pipe (5), and the ultrafiltration membrane filtration device (1) is provided with a water inlet end (101) and a water outlet end (102); The first differential pressure switch (2) is connected to the ultrafiltration membrane (103) and is used to detect the differential pressure on both sides of the ultrafiltration membrane; The electrodialysis treatment device (3) is connected to the water outlet (102) via a pipeline, and is used to perform electrodialysis treatment on the material filtered by the ultrafiltration membrane filtration device; the electrodialysis treatment device (3) is provided with a plurality of small chambers, including a fresh water chamber (301) and a concentrated water chamber (302); the fresh water chamber (301) is used to store low-concentration saline wastewater, and the concentrated water chamber (302) is used to store high-concentration saline wastewater; The evaporation chamber (4) is connected to the concentrated water chamber (302) of the electrodialysis treatment device (3), and performs evaporation and crystallization treatment on high-concentration salt-containing wastewater.

2. The device for recovering and treating salt-containing dye wastewater according to claim 1, characterized in that: The water inlet (101) and the water outlet (102) are both connected to a cleaning device; a forward washing device is provided at the water inlet (101) and a backwash device is provided at the water outlet (102); the forward washing device and the backwash device are both connected to a first differential pressure switch (2); the water inlet (101) is provided with a first solenoid valve (104), the water outlet (102) is provided with a second solenoid valve (107), and the second solenoid valve (107) is provided between the ultrafiltration membrane filtering device (1) and the electrodialysis treatment device (3).

3. The device for recovering and treating salt-containing dye wastewater according to claim 2, characterized in that: The forward washing device comprises a first washing pump (105), a water tank (6), and a third solenoid valve (108); the first washing pump (105) is arranged on a pipeline connecting the water inlet end (101) and the water tank (6) and is close to the water tank (6); the third solenoid valve (108) is arranged on a pipeline connecting the water inlet end (101) and the water tank (6) and is close to the water inlet end (101); The backwash device comprises a second cleaning pump (106), a water tank (6), and a fourth solenoid valve (109); the second cleaning pump (106) is arranged on a pipeline connecting the water outlet end (102) and the water tank (6), and is close to the water tank (6); the fourth solenoid valve (109) is arranged on a pipeline connecting the water outlet end (102) and the water tank (6), and is close to the water outlet end (102).

4. The device for recovering and treating salt-containing dye wastewater according to claim 3, characterized in that: The evaporation chamber (4) comprises an evaporation chamber shell, a stirring device, a transmission device, a vacuum pump (410), and a pressure sensor (413); The evaporation chamber shell is used to install various components, including a left cover (401) of the evaporation chamber, a right chamber (415) of the evaporation chamber, a water inlet (408), and a crystal row port (416). The left cover (401) of the evaporation chamber is fastened to the right chamber (415) of the evaporation chamber by bolts. A fifth solenoid valve (409) is provided at the water inlet (408), and a sixth solenoid valve (414) is provided at the crystal row port (416). The left cover (401) of the evaporation chamber is divided into two parts. The part on the left side is used to fix the transmission device, and the part on the right side is used to be connected with the right chamber of the evaporation chamber by bolts. The two parts are also fixedly connected by bolts. The stirring device is connected to the evaporation chamber shell and is arranged inside the evaporation chamber shell, and is used to stir the wastewater in the evaporation chamber; The transmission device is fixed on the left cover (401) of the evaporation chamber and connected to the stirring device, and is used to provide power to the stirring device in the evaporation chamber; The vacuum pump (410) is fixed to the right chamber (415) of the evaporation chamber by means of bolts, and the pressure sensor (413) is fixed to the right chamber (415) of the evaporation chamber by means of bolts, and is used to detect the pressure condition in the evaporation chamber.

5. The device for recovering and treating salt-containing dye wastewater according to claim 4, characterized in that: The stirring device comprises a left fixed seat (403), a right fixed seat (411), a stirring blade rod (412), and a stirring blade (407); The left fixing seat (403) is fixed to the left cover (401) of the evaporation chamber via a bearing, and the right fixing seat (411) is fixed to the right inner wall of the right cavity (415) of the evaporation chamber via bolts; The stirring blade rod (412) is connected to the right fixing seat (411) through a bearing, and a stirring blade (407) is provided on the stirring blade rod; The stirring blade (407) is used to stir the high-concentration salt-containing wastewater.

6. The device for recovering and treating salt-containing dye wastewater according to claim 5, characterized in that: The transmission device comprises a motor (406), a second gear shaft (405), and a first gear shaft (402); The motor (406) is fixed to the left cover (401) of the evaporation chamber by means of bolts, the second gear shaft (405) is connected to the motor (406) by means of a coupling, and the second gear shaft (405) is fixed to the left cover (401) of the evaporation chamber by means of a bearing; The second gear shaft (405) and the first gear shaft (402) are meshed and driven, and the lower end of the first gear shaft (402) is connected to the stirring blade rod (412); The first gear shaft (402) has a greater number of teeth than the second gear shaft (405).

7. The device for recovering and treating salt-containing dye wastewater according to claim 6, characterized in that: The first differential pressure switch (2) is respectively connected to the first solenoid valve (104), the second solenoid valve (107), the first cleaning pump (105), the third solenoid valve (108), the second cleaning pump (106), the fourth solenoid valve (109), and the delivery pump (110); The delivery pump (110) is arranged on the recovery pipeline (5) and is used to deliver saline wastewater.

8. The device for recovering and treating salt-containing dye wastewater according to claim 7, characterized in that: A preheating chamber (404) is provided on the fifth solenoid valve (409), and the preheating chamber (404) includes a heater and a temperature sensor. The heater preheats the high-concentration salt-containing wastewater transported into the preheating chamber, and the temperature sensor is used to detect the temperature of the high-concentration salt-containing wastewater during preheating.

9. The device for recovering and treating salt-containing dye wastewater according to claim 8, characterized in that: The inner cavity of the left cover (401) of the evaporation chamber and the inner cavity of the right cavity (415) of the evaporation chamber are sealed and isolated.

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