Wastewater treatment device and industrial production system

Abstract

The utility model provides a wastewater treatment device and an industrial production system.The wastewater treatment device comprises a high-pressure reverse osmosis device and a hollow fiber reverse osmosis system, on one hand, after primary treatment is conducted on raw water through pretreatment, the raw water sequentially enters the high-pressure reverse osmosis device and the hollow fiber reverse osmosis system; compared with the raw water, the concentrated water treated by the high-pressure reverse osmosis device has the advantages that the water quantity is greatly reduced, and compared with the direct treatment of the raw water, the concentrated water treated by the hollow fiber reverse osmosis system can reduce the equipment quantity of the hollow fiber reverse osmosis system. On the other hand, the outlet of the concentrated water cavity is connected with the inlet of the fresh water cavity through the return pipe, so that the salt content of water in the fresh water cavity is increased, the concentration pressure of the hollow fiber reverse osmosis system is reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the field of water treatment, in particular to a wastewater treatment device and an industrial production system. Background Art

[0002] The vast majority of the final concentrated water from a zero-emission process still needs to undergo evaporation and crystallization to crystallize the salt from the concentrated water, ultimately achieving zero emissions. It has been estimated that the investment cost per ton of water for evaporators and crystallizers is: imported equipment costs 1.5 to 2 million yuan per ton of water; imported technology, domestically manufactured equipment costs 1.1 to 1.4 million yuan per ton of water (Tang Mingyuan. A Brief Discussion on Zero-Emission Evaporation Technology for High-Salinity Wastewater, China Resource Comprehensive Utilization, September 2019). Therefore, how to economically and effectively separate the fresh water from the concentrate in the super-concentration process before entering the evaporation and crystallization system, thereby reducing the investment and operating costs of evaporation and crystallization, is the key to reducing the investment and operating costs of the entire zero-emission process.

[0003] In view of this, this application is hereby filed. Utility Model Content

[0004] The purpose of the utility model is to provide a wastewater treatment device and an industrial production system, which can increase the salt content of concentrated water subsequently entering an evaporation crystallization system under the condition of relatively low water pressure.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] In a first aspect, the present invention provides a wastewater treatment device, comprising a raw water tank, a pretreatment device, a high-pressure reverse osmosis device, and a hollow fiber reverse osmosis system, wherein the hollow fiber reverse osmosis system comprises a concentrated water chamber and a fresh water chamber separated by a hollow fiber reverse osmosis membrane, wherein the fresh water chamber and the concentrated water chamber are both provided with an inlet and an outlet;

[0007] The raw water pool is connected to the inlet of the pretreatment device, the outlet of the pretreatment device is connected to the raw water inlet of the high-pressure reverse osmosis device, the produced water outlet of the high-pressure reverse osmosis device is connected to the recycled water pool, the concentrated water outlet of the high-pressure reverse osmosis device is connected to the inlet of the concentrated water chamber of the hollow fiber reverse osmosis system, the outlet of the concentrated water chamber is connected to the concentrated water pool, and the outlet of the concentrated water chamber is also connected to the inlet of the fresh water chamber through a reflux pipe.

[0008] In an optional embodiment, the hollow fiber reverse osmosis system includes two or more stages of hollow fiber reverse osmosis devices connected in series, and each stage of the hollow fiber reverse osmosis device includes a concentrated water chamber and a fresh water chamber separated by a hollow fiber reverse osmosis membrane.

[0009] In an optional embodiment, the concentrated water outlet of the high-pressure reverse osmosis device is connected to the inlet of the concentrated water chamber of the first-stage hollow fiber reverse osmosis device, and the concentrated water chamber outlet of the last-stage hollow fiber reverse osmosis device is further connected to the inlet of the fresh water chamber of the last-stage hollow fiber reverse osmosis device through a reflux pipe;

[0010] In two adjacent hollow fiber reverse osmosis devices: the concentrated water chamber outlet of the previous hollow fiber reverse osmosis device is connected to the concentrated water chamber inlet of the next hollow fiber reverse osmosis device, and the fresh water outlet of the next hollow fiber reverse osmosis device is connected to the fresh water inlet of the previous hollow fiber reverse osmosis device.

[0011] In an optional embodiment, the fresh water outlet of the first-stage hollow fiber reverse osmosis device is connected to the inlet of the raw water tank.

[0012] In an optional embodiment, a first flow control valve is provided on the return pipe;

[0013] The outlet of the concentrated water chamber of the last stage hollow fiber reverse osmosis device is connected to the concentrated water pool through a concentrated water pipe, and a valve is provided on the concentrated water pipe.

[0014] In an optional embodiment, the pretreatment device includes a safety filter and an electromagnetic scale prevention device.

[0015] In an optional embodiment, the pretreatment device includes a security filter and an electromagnetic scale inhibition device connected in sequence by pipelines, the raw water tank is connected to the inlet of the security filter, and the outlet of the electromagnetic scale inhibition device is connected to the raw water inlet of the high-pressure reverse osmosis device.

[0016] In an optional embodiment, a water delivery pump is provided between the raw water pool and the inlet of the security filter, and a high-pressure pump is provided between the outlet of the electromagnetic scale inhibition device and the raw water inlet of the high-pressure reverse osmosis device.

[0017] In an optional embodiment, the concentrated water pool is provided with an outlet, and the outlet of the concentrated water pool is connected to a concentrated water evaporation system via a pipeline.

[0018] In a second aspect, the present invention provides an industrial production system, comprising the wastewater treatment device described in any one of the aforementioned embodiments.

[0019] The beneficial effects of the embodiments of the present invention are as follows: the wastewater treatment device in the present application includes a high-pressure reverse osmosis device and a hollow fiber reverse osmosis system: on the one hand, the high-pressure reverse osmosis device has high water treatment efficiency and a large processing capacity, but the salt content in the concentrated water is limited, and the hollow fiber reverse osmosis system has a small processing capacity but a high degree of concentration. Therefore, in this embodiment, after the raw water is preliminarily treated by pretreatment, it enters the high-pressure reverse osmosis device and the hollow fiber reverse osmosis system in sequence. The concentrated water treated by the high-pressure reverse osmosis device has a greatly reduced water volume compared to the raw water. Compared with directly treating the raw water, the concentrated water entering the hollow fiber reverse osmosis system for treatment can reduce the number of equipment in the hollow fiber reverse osmosis system. On the other hand, when the hollow fiber reverse osmosis system is concentrated, as the concentration proceeds, the concentration difference between the water in the concentrated water chamber and the fresh water chamber continues to increase, resulting in a gradual increase in the required pressure. Therefore, in the embodiment of the present application, the outlet of the concentrated water chamber is connected to the inlet of the fresh water chamber through a reflux pipe to increase the salt content of the water in the fresh water chamber, which is beneficial to reducing the concentration pressure of the hollow fiber reverse osmosis system, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of a wastewater treatment device in the present utility model;

[0022] Figure 2 This is a schematic diagram of the pipeline connection of a wastewater treatment device in the utility model.

[0023] Icons: 100-raw water tank; 200-water transfer pump; 300-safety filter; 400-electromagnetic scale prevention device; 500-high-pressure pump; 600-high-pressure reverse osmosis device; 700-hollow fiber reverse osmosis system; 710-hollow fiber reverse osmosis device; 720-return pipe; 800-recycled water tank; 900-concentrated water evaporation system; 910-concentrated water tank. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] Please refer to Figure 1 and Figure 2 This embodiment provides a wastewater treatment device, including a raw water tank 100, a pretreatment device, a high-pressure reverse osmosis device 600, and a hollow fiber reverse osmosis system 700. The hollow fiber reverse osmosis system 700 includes a concentrated water chamber and a fresh water chamber separated by a hollow fiber reverse osmosis membrane. The fresh water chamber and the concentrated water chamber are both provided with an inlet and an outlet.

[0031] The raw water pool 100 is connected to the inlet of the pretreatment device, the outlet of the pretreatment device is connected to the raw water inlet of the high-pressure reverse osmosis device 600, the produced water outlet of the high-pressure reverse osmosis device 600 is connected to the recycled water pool 800, the concentrated water outlet of the high-pressure reverse osmosis device 600 is connected to the inlet of the concentrated water chamber of the hollow fiber reverse osmosis system 700, the outlet of the concentrated water chamber is connected to the concentrated water pool 910, and the outlet of the concentrated water chamber is also connected to the inlet of the fresh water chamber through a reflux pipe 720.

[0032] In the embodiments of the present application, on the one hand, the high-pressure reverse osmosis device 600 has high water treatment efficiency and a large processing capacity, but the salt content of the resulting concentrate is limited. The hollow fiber reverse osmosis system 700 has a small processing capacity but a high degree of concentration. Therefore, in this embodiment, after the raw water is initially treated through pretreatment, it enters the high-pressure reverse osmosis device 600 and the hollow fiber reverse osmosis system 700 in sequence. The concentrate treated by the high-pressure reverse osmosis device 600 has a significantly lower volume than the raw water. Compared to directly treating the raw water, the concentrate entering the hollow fiber reverse osmosis system 700 can reduce the number of devices in the hollow fiber reverse osmosis system 700. On the other hand, as the hollow fiber reverse osmosis system 700 concentrates, the concentration difference between the concentrate chamber and the dilute chamber increases as the concentration progresses, resulting in a gradual increase in the required pressure. Therefore, in the embodiments of the present application, the outlet of the concentrate chamber is connected to the inlet of the dilute chamber via a return pipe 720 to increase the salt content of the water in the dilute chamber, which helps to reduce the concentration pressure of the hollow fiber reverse osmosis system 700 and thus reduce energy consumption.

[0033] It should be noted that the wastewater treatment device in this embodiment is suitable for raw water with a pH of 3-8, a salt content of >20,000 mg / L, and an SDI of <4. If the SDI of the raw water cannot meet the requirements, an ultrafiltration device can be added before entering the high-pressure reverse osmosis.

[0034] In an optional embodiment, the hollow fiber reverse osmosis system 700 includes two or more stages of hollow fiber reverse osmosis devices 710 connected in series, and each stage of the hollow fiber reverse osmosis device 710 includes a concentrated water chamber and a dilute water chamber separated by a hollow fiber reverse osmosis membrane.

[0035] The wastewater is treated by two or more hollow fiber reverse osmosis devices 710 connected in series, which can further improve the concentration level.

[0036] In an optional embodiment, the concentrated water outlet of the high-pressure reverse osmosis device 600 is connected to the inlet of the concentrated water chamber of the first-stage hollow fiber reverse osmosis device 710, and the concentrated water chamber outlet of the last-stage hollow fiber reverse osmosis device 710 is further connected to the inlet of the fresh water chamber of the last-stage hollow fiber reverse osmosis device 710 via a return pipe 720;

[0037] In two adjacent hollow fiber reverse osmosis devices 710: the concentrated water chamber outlet of the previous hollow fiber reverse osmosis device 710 is connected to the concentrated water chamber inlet of the next hollow fiber reverse osmosis device 710, and the fresh water outlet of the next hollow fiber reverse osmosis device 710 is connected to the fresh water inlet of the previous hollow fiber reverse osmosis device 710.

[0038] The raw water passes through the security filter 300 and the electromagnetic scale prevention device 400, and then passes through the high-pressure pump 500 to further increase the pressure and enters the high-pressure reverse osmosis system. The fresh water portion of the high-pressure reverse osmosis enters the reuse water pool, while the high-pressure reverse osmosis concentrated water enters the subsequent hollow fiber reverse osmosis system 700. The hollow fiber reverse osmosis system 700 includes a central tube composed of a hollow fiber reverse osmosis membrane. The hollow fiber reverse osmosis concentrated water enters from one end outside the central tube and is distributed to the outside of each membrane fiber (concentrated water cavity) through the radial flow of the central tube. During the process, water molecules pass through the membrane fiber and enter the inside of the membrane fiber (fresh water cavity) and are concentrated step by step. The water flow direction of the fresh water chamber is opposite to that of the concentrated water chamber. As the number of stages increases, more and more fresh water passes through, and the salt content decreases step by step. It is necessary to apply greater pressure to push the fresh water from the concentrated water chamber into the fresh water chamber. Therefore, part of the concentrated water is returned to the fresh water chamber to reduce the concentration difference between the fresh water chamber and the concentrated water chamber. The water in the fresh water chamber is composed of two parts, namely the water molecules that permeate the concentrated water chamber through the membrane fibers and the concentrated brine after hollow fiber reverse osmosis flowing back to the fresh water chamber through the return pipe 720; this is conducive to reducing the pressure of reverse osmosis while ensuring the effect of reverse osmosis.

[0039] The high-pressure reverse osmosis and hollow fiber reverse osmosis system 700 uses pressure to force water molecules in the raw water to pass through the reverse osmosis membrane to the fresh water chamber to obtain fresh water, while the concentrated water remains in the concentrated water chamber, ultimately obtaining concentrated water with a salt content of >180,000 mg / L.

[0040] It should be noted that the water in the fresh water chamber and the concentrated water chamber in the present application is set to flow in countercurrent, so that the salt content of the water in the fresh water chamber gradually increases along the direction of the concentrated water flow, and the salt content of the water in the concentrated water chamber also gradually increases along the direction of the concentrated water flow, which is beneficial to maintaining the pressure stability in the hollow fiber reverse osmosis system 700 to a certain extent.

[0041] In an optional embodiment, the fresh water outlet of the first-stage hollow fiber reverse osmosis device 710 is connected to the inlet of the raw water pool 100, and the raw water can be concentrated again subsequently.

[0042] In an optional embodiment, a first flow control valve is provided on the return pipe;

[0043] The outlet of the concentrated water chamber of the last-stage hollow fiber reverse osmosis device 710 is connected to the concentrated water tank 910 via a concentrated water pipe, and a valve is provided on the concentrated water pipe.

[0044] Normally, it is necessary to adjust the flow rate of the concentrated water returning in the return pipe. Generally, the volume of the concentrated water returning to the fresh water chamber in the return pipe does not exceed 40% of the water volume in the concentrated water chamber of the last stage of the hollow fiber reverse osmosis device 710, so as to reduce the processing pressure of the hollow fiber reverse osmosis device 710 while increasing the salt content of the final concentrated water.

[0045] In an optional embodiment, the pretreatment device includes a safety filter 300 and an electromagnetic scale prevention device 400 .

[0046] The safety filter 300 can intercept large particles to prevent damage to the high-pressure pump 500 and the subsequent membrane system.

[0047] The electromagnetic scale inhibition device 400 uses an electromagnetic field to exert Lorentz forces in different directions on metal cations and anions, reducing the probability of the two ions attracting each other and forming scale molecules. Simultaneously, the strong electromagnetic field disrupts hydrogen bonds between ions and water molecules, and between water molecules themselves, reducing the surface tension of the aqueous solution and enhancing its solubility. Furthermore, the metal cations and anions are enveloped in a single cloud of water molecules, further reducing the probability of scale molecules forming. The electromagnetic scale inhibition system primarily reduces the scaling probability of scaling ions by using the electromagnetic field, without the need for the addition of scale inhibitors.

[0048] In addition, the electromagnetic scale inhibition device 400 is also a guarantee for the stable operation of the super-concentration stage. Without the electromagnetic scale inhibition device 400, after the system inlet water is highly concentrated, the scaling ions in it, such as silica, calcium and magnesium ions, will form silicon scale, calcium and magnesium scale, etc. on the inside and outside of the membrane fibers. In mild cases, frequent cleaning is required, and in severe cases, the membrane will be scaled and scrapped. Therefore, stable and effective scale inhibition technology is also a guarantee and prerequisite for the realization of the super-concentration process.

[0049] In an optional embodiment, the pretreatment device includes a security filter 300 and an electromagnetic scale prevention device 400 connected in sequence by pipelines, the raw water tank 100 is connected to the inlet of the security filter 300, and the outlet of the electromagnetic scale prevention device 400 is connected to the raw water inlet of the high-pressure reverse osmosis device 600.

[0050] Filtering the raw water first and then performing electromagnetic scale inhibition can prevent insoluble matter from being partially dissolved by the electromagnetic scale inhibition device 400, thereby reducing the proportion of water in the wastewater.

[0051] In an optional embodiment, a water supply pump 200 is provided between the raw water pool 100 and the inlet of the security filter 300, and a high-pressure pump 500 is provided between the outlet of the electromagnetic scale inhibition device 400 and the raw water inlet of the high-pressure reverse osmosis device 600 to ensure the water flow rate and provide sufficient water pressure, which is conducive to the normal operation of the high-pressure reverse osmosis device 600.

[0052] In an optional embodiment, the concentrated water tank 910 is provided with an outlet, and the outlet of the concentrated water tank 910 is connected to the concentrated water evaporation system 900 through a pipeline.

[0053] Specifically, the process of treating wastewater using the wastewater treatment device in the embodiment of the present application includes the following steps:

[0054] 1. Preprocessing stage

[0055] A. The raw water treated by the recycled water system is temporarily stored in the raw water tank 100 and then passes through the safety filter 300 via the water pump 200 to intercept large particles and prevent damage to the high-pressure pump 500 and subsequent membrane system.

[0056] The raw water after passing through the safety filter 300 then passes through the electromagnetic scale prevention device 400.

[0057] 2. Super-concentrated stage

[0058] C. The raw water, after passing through the security filter 300 and electromagnetic scale inhibitor 400, is further pressurized to approximately 50 bar by a high-pressure pump 500 and enters the high-pressure reverse osmosis system (the reverse osmosis membrane can be selected from desalination membranes from Veolia, Hyde Energy, Dow, and other suppliers). The high-pressure reverse osmosis concentrate is then concentrated through a multi-stage concentration process in a hollow fiber reverse osmosis system 700, ultimately being divided into two parts. One part goes directly to the concentrate tank and then to the concentrate treatment unit via a concentrate pump. The other part returns to the final fresh water chamber and is then pressure-returned to the first stage. As this concentrate flows from the last stage to the first, it is gradually diluted by the fresh water that permeates the membrane and ultimately returns to the raw water tank and enters the high-pressure reverse osmosis system together with the fresh raw water. By controlling the hollow fiber reverse osmosis return flow and the ratio of the brine produced, the concentration gradient across each membrane is maintained within a certain range, ensuring that the salt content of the final brine produced can be concentrated to above 180,000 mg / L even at relatively low inlet pressures (less than 70 bar).

[0059] In this embodiment, the system influent is subjected to magnetization pretreatment to obtain pretreated brine. Without the need to add a scale inhibitor, the subsequent superconcentration process can be guaranteed to operate stably without scaling. In the superconcentration process section, the salt recovery rate in the concentrated water can reach 90%, the salt content of the concentrated water is greater than 180,000 mg / L, the maximum water inlet pressure is 70 bar, the maximum pressure drop is 0.1 MPa, and the operating pH value range is 3-8.

[0060] Specifically, in some embodiments, the above-mentioned wastewater treatment process is applied to the reverse osmosis concentrated water of a typical coal chemical wastewater treatment project as an example. The concentrated water has a pH of 5-7 and a salt content of 27,000-35,000 mg / L. After being treated by the super-concentration device and process of the present application, the salt content of the concentrated water is increased to 180,000-200,000 mg / L.

[0061] In a second aspect, the present invention provides an industrial production system, comprising the wastewater treatment device described in any one of the aforementioned embodiments.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A wastewater treatment device, characterized in that: The invention comprises a raw water tank, a pretreatment device, a high-pressure reverse osmosis device and a hollow fiber reverse osmosis system, wherein the hollow fiber reverse osmosis system comprises a concentrated water chamber and a fresh water chamber separated by a hollow fiber reverse osmosis membrane, and the fresh water chamber and the concentrated water chamber are both provided with an inlet and an outlet; The raw water pool is connected to the inlet of the pretreatment device, the outlet of the pretreatment device is connected to the raw water inlet of the high-pressure reverse osmosis device, the produced water outlet of the high-pressure reverse osmosis device is connected to the recycled water pool, the concentrated water outlet of the high-pressure reverse osmosis device is connected to the inlet of the concentrated water chamber of the hollow fiber reverse osmosis system, the outlet of the concentrated water chamber is connected to the concentrated water pool, and the outlet of the concentrated water chamber is also connected to the inlet of the fresh water chamber through a reflux pipe.

2. The wastewater treatment device according to claim 1, characterized in that The hollow fiber reverse osmosis system includes two or more stages of hollow fiber reverse osmosis devices connected in series, and each stage of the hollow fiber reverse osmosis device includes a concentrated water chamber and a fresh water chamber separated by a hollow fiber reverse osmosis membrane.

3. The wastewater treatment device according to claim 2, characterized in that The concentrated water outlet of the high-pressure reverse osmosis device is connected to the inlet of the concentrated water chamber of the first-stage hollow fiber reverse osmosis device, and the concentrated water chamber outlet of the last-stage hollow fiber reverse osmosis device is also connected to the inlet of the fresh water chamber of the last-stage hollow fiber reverse osmosis device through a reflux pipe; In two adjacent hollow fiber reverse osmosis devices: the concentrated water chamber outlet of the previous hollow fiber reverse osmosis device is connected to the concentrated water chamber inlet of the next hollow fiber reverse osmosis device, and the fresh water outlet of the next hollow fiber reverse osmosis device is connected to the fresh water inlet of the previous hollow fiber reverse osmosis device.

4. The wastewater treatment device according to claim 3, characterized in that The fresh water outlet of the first-stage hollow fiber reverse osmosis device is connected to the inlet of the raw water pool.

5. The wastewater treatment device according to claim 3, characterized in that: The reflux pipe is provided with a first flow control valve; The outlet of the concentrated water chamber of the last stage hollow fiber reverse osmosis device is connected to the concentrated water pool through a concentrated water pipe, and a valve is provided on the concentrated water pipe.

6. The wastewater treatment device according to claim 1, characterized in that The pretreatment device includes a safety filter and an electromagnetic scale prevention device.

7. The wastewater treatment device according to claim 6, characterized in that The pretreatment device includes a security filter and an electromagnetic scale prevention device connected in sequence by pipelines. The raw water tank is connected to the inlet of the security filter, and the outlet of the electromagnetic scale prevention device is connected to the raw water inlet of the high-pressure reverse osmosis device.

8. The wastewater treatment device according to claim 7, characterized in that: A water delivery pump is provided between the raw water pool and the inlet of the security filter, and a high-pressure pump is provided between the outlet of the electromagnetic scale inhibition device and the raw water inlet of the high-pressure reverse osmosis device.

9. The wastewater treatment device according to claim 1, characterized in that The concentrated water pool is provided with an outlet, and the outlet of the concentrated water pool is connected to a concentrated water evaporation system through a pipeline.

10. An industrial production system, characterized in that: A wastewater treatment device comprising the wastewater treatment device according to any one of claims 1 to 9.

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