High-salinity wastewater treatment device

Abstract

The invention provides a high-salinity wastewater treatment device which comprises a water inlet main pipeline, a branch pipeline, a reaction unit, a water outlet main pipeline, a gas collection device and a radiator which are sequentially connected, the water inlet main pipeline is provided with an anti-explosion magnetic pump, and the branch pipeline is provided with a flow meter and an electric ball valve and used for introducing wastewater of the water inlet main pipeline into the reaction unit. The reaction unit comprises a plurality of reactors and is used for carrying out electrochemical oxidation and ultraviolet light advanced oxidation on wastewater, the gas collecting device is used for conveying the wastewater of the water outlet main pipeline to the radiator and treating tail bodies generated by the reactors, and the radiator is used for conveying the wastewater subjected to heat dissipation to the water inlet main pipeline again. And the treated wastewater is discharged to a treated water collecting tank through a water discharging pipeline of the water inlet main pipeline. According to the high-salinity wastewater treatment device, through electrochemical oxidation and ultraviolet light advanced oxidation, treatment of high-salinity wastewater is achieved, a batch water inlet-multiple circulation treatment mode of the high-salinity wastewater is achieved, the control precision is high, the effluent quality is more stable, and the treatment efficiency and economical efficiency of the process are overall improved.

Description

Technical Field

[0001] This invention relates to a, and more particularly to, a high-salinity wastewater treatment device. Background Technology

[0002] Currently, the main treatment method for high-COD, recalcitrant organic high-salt wastewater is the Fenton reaction + activated carbon. This method generates strong oxidizing free radicals to degrade organic matter in the wastewater, followed by activated carbon adsorption to reduce COD. However, this process is costly, requires a large space, and can cause secondary pollution. Electrochemical methods can also reduce COD, but these processes generate harmful and flammable gases such as hydrogen, chlorine, and oxygen. Furthermore, dyeing and coal chemical wastewater contains surfactants, which produce significant foaming under flowing conditions and high temperatures. This foaming can lead to gas accumulation and safety risks. Summary of the Invention

[0003] This invention provides a high-salinity wastewater treatment device that solves the problem of using an electrolysis + ultraviolet combined treatment process for organic matter in high-salinity wastewater, and is designed based on a deep decontamination mechanism of multi-radical coupling chlorination-dehalogenation-hydroxylation (CDH). The technical solution is as follows:

[0004] A high-salinity wastewater treatment device includes an inlet main pipeline, branch pipelines, a reaction unit, an outlet main pipeline, a gas collection device, and a radiator connected in sequence. The inlet main pipeline is equipped with an explosion-proof magnetic pump that introduces wastewater from a high-salinity wastewater collection tank. The branch pipelines are equipped with flow meters and electric ball valves for introducing wastewater from the inlet main pipeline into the reaction unit. The reaction unit includes multiple reactors for electrochemical oxidation and ultraviolet advanced oxidation of the wastewater. The outlet of each reactor is connected to the outlet main pipeline. The gas collection device is used to send the wastewater from the outlet main pipeline to the radiator and treat the tailings produced by the reactor. The radiator sends the cooled wastewater back into the inlet main pipeline. After passing the water quality parameter testing instrument, the treated wastewater is discharged into a treated water collection tank through the drainage pipeline of the inlet main pipeline.

[0005] The main water inlet pipeline is also connected to a cleaning pipeline via a cleaning valve to clean the processing device, including the reaction unit, with a cleaning solution. The cleaning solution is then discharged through a drain pipeline.

[0006] The gas collection device includes an upper tank and a lower tank arranged vertically. The upper tank is equipped with an alkaline spraying device, a gas discharge pipe, a tail gas collection device, a first liquid level sensor, and an alkaline discharge pipe. The gas discharge pipe is connected to a hydrogen dilution system to create negative pressure on the upper tank, so that the gas entering the lower tank is drawn back to the upper tank through the tail gas collection device. The alkaline spraying device is used to spray alkaline solution onto the upper tank. Based on the liquid level data from the first liquid level sensor, the gas collection device discharges the alkaline solution through the alkaline discharge pipe.

[0007] A hydrogen alarm device is installed at the rear end of the gas discharge pipe. The hydrogen alarm device is used to detect the hydrogen concentration of the discharged gas during the test to prevent the hydrogen concentration from being too high and causing safety risks.

[0008] It includes several steps: water intake process, internal circulation process, drainage process, and flushing process.

[0009] S1: Water Inlet Process: Wastewater enters the branch pipeline through the main inlet pipeline. The opening of the electric ball valve is adjusted by the feedback signal from the flow meter on the branch pipeline to ensure that the wastewater in the main inlet pipeline flows evenly to each reactor in the reaction unit. The outlets of the reactors merge into the main outlet pipeline at the top and flow into the gas collection device. When the wastewater is collected in the gas collection device, the liquid level rises to the position of the liquid level sensor. The liquid level sensor feeds back the signal to the control cabinet to complete the water inlet process.

[0010] S2: Internal circulation process: The control cabinet of the high-salt wastewater treatment device receives the signal from the liquid level sensor in the gas collection device and starts the internal circulation process pipeline. The gas collection device draws the combined wastewater into the radiator, and the radiator then draws the cooled wastewater into the inlet of the main water inlet pipeline. The reaction unit treats the wastewater to realize the internal circulation of wastewater. The exhaust gas generated during the circulation process is absorbed, diluted and discharged through the gas collection device.

[0011] S3: Drainage process: When the reaction continues and the COD of the wastewater is reduced to the required value, the water quality parameter detection instrument will transmit the signal to the control cabinet. The control cabinet will control the electric ball valve of the reaction unit to close and start the drainage ball valve. The wastewater that has completed the reaction will be discharged through the drainage pipeline by the magnetic pump.

[0012] S4: Flushing process: The control cabinet starts the flushing process, injects the cleaning liquid into the reactor and discharges it through the magnetic pump, thereby flushing the crystallized salt and impurities in the pipeline system.

[0013] The water quality parameter detection instrument samples and processes high-salinity wastewater through a sampling inlet valve and a sampling outlet valve, and performs COD, pH, temperature, conductivity and ORP detection on the high-salinity wastewater.

[0014] The reactor is equipped with an ultraviolet advanced oxidation device, which includes a lamp tube sealing welded tube, a lamp tube lock nut, an ultraviolet lamp, a quartz tube, and a bottom movable protective bracket. A quartz tube is provided on the outside of the ultraviolet lamp. The ultraviolet lamp and the quartz tube are inserted into the inside of the reactor body. The top is fixedly connected to the lamp tube sealing welded tube by the lamp tube lock nut, and the bottom is fixed by the bottom movable protective bracket located inside the reactor.

[0015] The lamp tube sealing welded tube is welded and sealed to the flange and cylinder at the end of the reactor. A lamp tube sealing ring is provided between the quartz tube and the lamp tube sealing welded tube. The ultraviolet lamp tube and the lamp tube lock nut are fixed and sealed by threads.

[0016] The bottom of the quartz tube is inserted into the opening of the bottom movable protective bracket. A silicone protective sleeve is provided at the opening to prevent water flow from impacting the quartz tube. The bottom movable protective bracket is provided with a threaded opening and is fixedly connected to the bottom fixed protective bracket by bolts. The bottom fixed protective bracket is fixedly installed inside the reactor.

[0017] The length of the ultraviolet lamp is 1.3 to 1.8 m.

[0018] The electrochemical oxidation device includes multiple electrodes, which are isolated from each other by silicone pads. The upper and lower ends of the multiple electrodes are fixed by upper electrode connecting flanges and lower electrode connecting flanges, respectively. The electrochemical oxidation device is fixed to the lower connecting flange of the cylinder by connecting screws.

[0019] The high-salinity wastewater treatment device utilizes electrochemical oxidation and advanced ultraviolet oxidation to treat high-salinity wastewater. It employs a batch-influent, multi-cycle treatment mode, achieving high control precision and more stable effluent quality, thus improving overall process efficiency and economy. The effluent quality meets the following standards: COD purification rate ≥80% (1 hour of circulation treatment), COD reduced from 600 ppm to 120 ppm (4 hours), and residual chlorine <0.1 mg / L. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the high-salinity wastewater treatment device.

[0021] Figure 2 This is a schematic diagram of the structure of the high-salinity wastewater treatment device;

[0022] Figure 3 This is a schematic diagram of the frame of the gas collection device;

[0023] Figure 4 This is a schematic diagram of the structure of the gas collection device;

[0024] Figure 5This is a schematic diagram of the overall process of the high-salinity wastewater treatment device;

[0025] Figure 6 This is the control logic diagram of the high-salt wastewater treatment device;

[0026] Figure 7 It is the aforementioned Figure 6 A schematic diagram of the upper part;

[0027] Figure 8 It is the aforementioned Figure 6 A schematic diagram of the lower half;

[0028] Figure 9 This is a schematic diagram of the structure of the reaction unit;

[0029] Figure 10 This is a cross-sectional schematic diagram of the reaction unit;

[0030] Figure 11 It is the aforementioned Figure 9 A schematic diagram of section I;

[0031] Figure 12 It is the aforementioned Figure 9 A schematic diagram of Part II;

[0032] Figure 13 This is a schematic diagram of the structure of the bottom movable protective bracket;

[0033] Figure 14 It is the aforementioned Figure 9 A schematic diagram of Part III;

[0034] Figure 15 This is a schematic diagram of the structure of the alkaline spraying device and the defoaming spraying device;

[0035] Figure 16 This is a schematic diagram of the exhaust gas collection device. Detailed Implementation

[0036] like Figure 1 and Figure 2As shown, the high-salinity wastewater treatment device includes an inlet main pipeline 100, branch pipelines 200, a reaction unit 300, an outlet main pipeline 400, a gas collection device 500, and a radiator 600 connected in sequence. The inlet main pipeline 100 is equipped with an explosion-proof magnetic pump to introduce wastewater from the high-salinity wastewater collection tank 800. The branch pipelines 200 are equipped with flow meters and electric ball valves to introduce wastewater from the inlet main pipeline 100 into the reaction unit 300. The reaction unit 300 consists of multiple reactors for electrochemical oxidation of the wastewater. With ultraviolet light advanced oxidation, the outlet of the reactor is connected to the effluent main pipeline 400. The gas collection device 500 is used to send the wastewater from the effluent main pipeline 400 to the radiator 600 and treat the tailings produced by the reactor. The radiator 600 sends the cooled wastewater back into the influent main pipeline 100 to realize batch influent-multiple circulation treatment of high salinity wastewater. After passing the test by the water quality parameter testing instrument 900, the treated wastewater is discharged into the treated water collection tank 700 through the drainage pipe of the influent main pipeline 100.

[0037] Furthermore, the main inlet pipeline 100 is connected to a cleaning pipeline via a cleaning valve to clean the treatment device, including the reaction unit 300, using a cleaning solution. The cleaning solution is then discharged through a drain pipeline. The pipelines of the high-salt wastewater treatment device are made of national standard PVC-U material, which is resistant to wastewater corrosion.

[0038] like Figure 3 and Figure 4 As shown, the gas collection device 500 includes an upper tank A and a lower tank B arranged vertically. The upper tank A is equipped with an alkali spraying device 1, an air inlet 2, a gas exhaust pipe 3, a tail gas collection device 4, a first liquid level sensor 8, and an alkali discharge pipe 9. The gas exhaust pipe 3 is connected to a hydrogen dilution system to create negative pressure on the upper tank A, so that gas entering the lower tank B is drawn back to the upper tank A through the tail gas collection device 4. The alkali spraying device 1 is as follows... Figure 15 As shown, the device is used to spray alkaline solution onto the upward tank A. The first liquid level sensor 8 is used to detect the height of the alkaline solution. Based on the data from the first liquid level sensor 8, the gas collection device 500 discharges the alkaline solution through the alkaline solution discharge pipe 9.

[0039] A hydrogen alarm device 7 is installed at the rear end of the gas discharge pipe 3. The hydrogen alarm device 7 is fixed to the gas discharge pipe 3 by clamping it, and is used to detect the hydrogen concentration of the discharged gas during the test to prevent the hydrogen concentration from being too high and causing safety risks. An air inlet 2 is provided opposite the gas discharge pipe 3, and the air inlet 2 is connected to the tank body through a flange.

[0040] The alkaline spraying device 1 is connected and sealed by a PT thread at the end, and an electric ball valve is connected to the other side. It is linked with the second liquid level sensor 8 to control the liquid level of the alkaline solution in the upper tank A. The main body has four small holes to ensure that the water column is sprayed into the upper tank through the small holes to absorb the unreacted chlorine gas in the air.

[0041] The exhaust gas collection device 4, as described above Figure 16 As shown, the whole is mushroom-shaped and is used for gas collection and to prevent alkali liquid from being sprayed into the lower tank. There are 4 openings at the top for the gas from the lower tank B to be introduced into the upper tank A.

[0042] The first liquid level sensor 8 is securely sealed to the upper tank via a PY thread and is used to control the input and output of alkali solution. The dual sensors provide double protection, ensuring that even if one fails, the alkali solution level will not become uncontrollable. The alkali solution discharge pipe 9 is externally connected to an electric ball valve, which is linked to the first liquid level sensor 8 to control the alkali solution level in the tank.

[0043] The lower tank B is equipped with a second liquid level sensor 5, a defoaming spray device 6 and a temperature sensor 15, a wastewater inlet 10 on the side and a water outlet at the bottom.

[0044] The defoaming spray device 6, as described in Figure 15 As shown, the connection and sealing are achieved through the PT thread at the end, and an electric ball valve is connected to the other side. It is linked with the first liquid level sensor 5 to control the spraying time. The main body has 4 rings of dense air holes to ensure that the water column is sprayed into the tank through the small holes, thereby breaking up the foam that accumulates in the lower tank during the circulation process.

[0045] The first liquid level sensor is fastened and sealed to the lower tank body by a PY thread to control the liquid level height in the entire lower tank body. The dual sensors provide double protection, and even if one fails, the liquid level height in the lower tank body will not become uncontrollable.

[0046] The temperature sensor 15 is fastened and sealed to the lower tank body by a PY thread and is used to control the liquid temperature in the entire lower tank body. When the liquid temperature is too high, it can be linked with the cooling circulation end of the radiator to control the opening and closing of the coolant in the radiator cooling end.

[0047] In use, the main outlet pipeline 400 sends the wastewater from the reaction unit 300 to the gas collection device 500. At this time, the wastewater contains hydrogen, chlorine, oxygen, etc. The wastewater reaches the lower tank B at the lower end of the gas collection device 500 from the wastewater inlet 10.

[0048] The hydrogen dilution system connected to the gas discharge pipe 3 is equipped with a blower. After starting, the negative pressure generated carries the hydrogen and water-insoluble chlorine from the lower tank B to the upper tank A. The upper tank A sprays alkaline solution into the upper tank through the alkaline solution spraying device 1. The gas passes through the notch of the tail gas collection device 4 with a conical umbrella shape, guiding the chlorine and hydrogen accumulated in the lower tank B into the alkaline solution. Some of the chlorine not absorbed by the alkaline solution can be absorbed by the alkaline solution spraying device 1, while the hydrogen is discharged through the gas discharge pipe 3. When the hydrogen dilution system fails to work properly, the hydrogen concentration in the gas discharge pipe 3 increases, and the hydrogen alarm device 7 at the gas discharge pipe 3 will sound an alarm and transmit a signal to cut off the entire project to avoid safety risks.

[0049] When the hydrogen dilution system is functioning normally, the alkali solution in the upper tank A can have its level adjusted by the first level sensor 8. The alkali solution is then discharged through the alkali solution discharge pipe 9 to the alkali solution container, and subsequently circulated through the container to the alkali solution spraying device. The lower tank B controls the wastewater circulation rate via the second level sensor 5 to prevent circulating wastewater from entering the upper tank.

[0050] like Figures 5 to 8 As shown, the present invention is divided into an inlet process, an internal circulation process, a drainage process, and a flushing process during use. The working principle is specifically described in the following steps:

[0051] S1: Water Inlet Process: Turn on the magnetic pump to introduce wastewater into the main inlet pipeline 100. The wastewater flows through the main inlet pipeline 100 at the bottom of the reaction unit 300 and into 10 identical branch pipelines 200. The opening of the electric ball valve is adjusted by the feedback signal from the flow meter on the branch pipeline 200 to ensure that the wastewater in the main inlet pipeline 100 flows evenly to each reactor in the reaction unit 300. The outlets of the reactors then converge into the main outlet pipeline 400 at the top and flow into the gas collection device 500. When the wastewater is collected in the gas collection device 500, the liquid level rises to the position of the liquid level sensor 5. The liquid level sensor 5 feeds back the signal to the control cabinet to complete the water inlet process.

[0052] S2: Internal circulation process: The control cabinet of the high-salt wastewater treatment device receives the signal from the liquid level sensor 5 in the gas collection device 500 and starts the internal circulation process pipeline. The gas collection device 500 flows the combined wastewater into the radiator 600, and the radiator 600 then flows the cooled wastewater into the inlet of the main water inlet pipeline 100. The reaction unit 300 treats the wastewater to realize the internal circulation of wastewater. The exhaust gas generated during the circulation process is absorbed, diluted and discharged through the gas collection device 500.

[0053] In this reaction equipment, reaction unit 300 performs electrochemical oxidation and ultraviolet advanced oxidation on wastewater, producing gases including hydrogen, oxygen, and chlorine. Hydrogen is generated by the reduction reaction of hydrogen ions at the cathode (Formula 1); oxygen and chlorine are generated by oxygen evolution and chlorine evolution reactions, respectively (Formulas 2 and 3).

[0054] 2H + +2e - →H2↑(1)

[0055] 2H₂O→O₂↑+4H + +4e - (2)

[0056] Cl - +2e - →Cl2↑ (3)

[0057] The reaction unit is the core basic module of this equipment. The reaction unit has a built-in ultraviolet lamp and electrodes. Subsequently, batch water treatment can be achieved by connecting the reaction units in parallel according to the number of reaction units.

[0058] S3: Drainage process: When the reaction continues and the COD of the wastewater is reduced to the required value, the water quality parameter detection instrument 900 transmits the signal to the control cabinet. The control cabinet controls the electric ball valve of the reaction unit 300 to close and starts the drainage ball valve. The wastewater that has completed the reaction is discharged through the drainage pipeline by the magnetic pump.

[0059] The water quality parameter detection instrument 900 samples and processes high-salinity wastewater through a sampling inlet valve and a sampling outlet valve, and performs COD, pH, temperature, conductivity and ORP (oxidation-reduction potential) detection on the high-salinity wastewater.

[0060] S4: Flushing process: The control cabinet starts the flushing process, injects the cleaning liquid into the reactor and discharges it through the magnetic pump, thereby flushing the crystallized salt and impurities in the pipeline system.

[0061] The reaction unit 300 of this invention employs 10 reactors, each capable of single-module branch isolation and replacement with a capacity of 100L. The entire device can be connected in series as a single module to expand wastewater treatment capacity. During operation, the medium is cooled by a radiator, and a temperature sensor feeds back the medium temperature signal to the control cabinet to regulate the medium's operating temperature. The device includes a gas collection device 500 as a tail gas treatment unit to prevent illegal emissions of tail gas during water treatment.

[0062] like Figure 9 and Figure 10As shown, the reactor of the reaction unit 300 is equipped with an inlet 11 and an outlet 12, and is also equipped with an electrochemical oxidation device 13 and an ultraviolet advanced oxidation device 14. To ensure the effectiveness of the ultraviolet lamp in the ultraviolet advanced oxidation device 14, the ultraviolet lamp needs to be built into the reactor tank and a quartz lamp tube set is used. To ensure reaction efficiency, the ultraviolet lamp is about 1.6m in size, and there is a medium-pressure water flow inside. It is necessary to ensure sealing while also ensuring that the ultraviolet lamp is fixed and easy to replace after breakage.

[0063] like Figures 11 to 13 As shown, the ultraviolet advanced oxidation device 14 includes a lamp tube sealing welded tube 22, a lamp tube lock nut 24, an ultraviolet lamp tube 25, a quartz tube 26, and a bottom movable protective bracket 29. The quartz tube 26 is arranged on the outside of the ultraviolet lamp tube 25. The ultraviolet lamp tube 25 and the quartz tube 26 are inserted into the inner cylinder 27 of the reactor. The top is fixedly connected to the lamp tube sealing welded tube 22 by the lamp tube lock nut 24, and the bottom is fixed by the bottom movable protective bracket 29 located inside the reactor.

[0064] To ensure that the 1.6m long lamp tube can be smoothly placed into the inner body 27 of the reactor, the quartz tube 26 of the ultraviolet lamp needs to have a gap with the lamp tube sealing weld tube 22 to ensure that the quartz tube 26 is not damaged during the insertion process. Therefore, the quartz tube 26 and the lamp tube sealing weld tube 22 need to be sealed.

[0065] The lamp tube sealing welded tube 22 is welded and sealed to the flange 21 and the cylinder at the end of the reactor. The seal between the quartz tube 26 and the lamp tube sealing welded tube 22 is achieved by the inner thread of the lamp tube lock nut 24 and the outer thread of the lamp tube sealing welded tube 22. During rotation, the conical lamp tube sealing ring 23 is pressed against the lamp tube sealing welded tube 22 to seal it. The ultraviolet lamp tube 25 is fixed and sealed by the threaded connection between the inner thread of the lamp tube lock nut 24 and the outer thread of the ultraviolet lamp tube 25.

[0066] The bottom of the quartz tube 26 is fixed to the bottom movable protective bracket 29, which is provided with the following: Figure 12 The diagram shows multiple evenly arranged openings. The bottom end of the quartz tube 26 is hemispherical. A silicone protective sleeve 28 is placed between the bottom of the quartz tube 26 and the opening of the bottom movable protective bracket 29 to prevent water flow impact from causing the quartz tube 26 to sway and be damaged. The opening of the bottom movable protective bracket 29 is provided with a semi-circular protective cover to protect the hemispherical bottom end of the quartz tube 26. The bottom movable protective bracket 29 is provided with threaded openings and is fixedly connected to the bottom fixed protective bracket 30 by bolts. The bottom fixed protective bracket 30 is fixedly installed inside the reactor.

[0067] like Figure 14As shown, the electrochemical oxidation device 13 includes multiple electrodes 34. Due to the large number of electrodes 34, silicone pads 36 are used to isolate the electrodes from each other. The upper and lower ends of the multiple electrodes 34 are fixed by upper electrode connecting flanges and lower electrode connecting flanges, respectively.

[0068] The electrochemical oxidation device 13 is fixed to the lower connecting flange of the cylinder by a connecting screw 35. The connecting screw 35 passes through the through hole 31 of the lower connecting flange of the cylinder, the through hole 32 of the upper connecting flange of the electrode, and the through hole 33 of the lower connecting flange of the electrode for connection and fastening. After fastening, it can be used as a single electrode module 37 for sealing test. To ensure the normal operation of the electrode module 37, a leak test must be performed before each installation to avoid the risk of leakage during use. After passing the test, it can be installed as a whole on the lower connecting flange of the cylinder.

[0069] The high-salinity wastewater treatment device achieves the treatment of high-salinity wastewater through electrochemical oxidation and ultraviolet advanced oxidation, realizing a batch influent-multiple circulation treatment mode for high-salinity wastewater. It has high control precision, more stable effluent quality, and improves the overall treatment efficiency and economy of the process.

Claims

1. A high-salinity wastewater treatment device, characterized in that: The system includes a main inlet pipeline, branch pipelines, a reaction unit, a main outlet pipeline, a gas collection device, and a radiator connected in sequence. The main inlet pipeline is equipped with an explosion-proof magnetic pump that introduces wastewater from a high-salt wastewater collection tank. The branch pipelines are equipped with flow meters and electric ball valves to introduce wastewater from the main inlet pipeline into the reaction unit. The reaction unit includes multiple reactors that perform electrochemical oxidation and ultraviolet advanced oxidation on the wastewater. The outlet of each reactor is connected to the main outlet pipeline. The gas collection device is used to send the wastewater from the main outlet pipeline to the radiator and treat the tailings produced by the reactor. The radiator sends the cooled wastewater back into the main inlet pipeline. After passing the water quality parameter testing instrument, the treated wastewater is discharged into the treated water collection tank through the drainage pipeline of the main inlet pipeline.

2. The high-salinity wastewater treatment device according to claim 1, characterized in that: The main water inlet pipeline is also connected to a cleaning pipeline via a cleaning valve to clean the processing device, including the reaction unit, with a cleaning solution. The cleaning solution is then discharged through a drain pipeline.

3. The high-salinity wastewater treatment device according to claim 1, characterized in that: The gas collection device includes an upper tank and a lower tank arranged vertically. The upper tank is equipped with an alkaline spraying device, a gas discharge pipe, a tail gas collection device, a first liquid level sensor, and an alkaline discharge pipe. The gas discharge pipe is connected to a hydrogen dilution system to create negative pressure on the upper tank, so that the gas entering the lower tank is drawn back to the upper tank through the tail gas collection device. The alkaline spraying device is used to spray alkaline solution onto the upper tank. Based on the liquid level data from the first liquid level sensor, the gas collection device discharges the alkaline solution through the alkaline discharge pipe.

4. The high-salinity wastewater treatment device according to claim 3, characterized in that: A hydrogen alarm device is installed at the rear end of the gas discharge pipe. The hydrogen alarm device is used to detect the hydrogen concentration of the discharged gas during the test to prevent the hydrogen concentration from being too high and causing safety risks.

5. The high-salinity wastewater treatment device according to claim 1, characterized in that: It includes several steps: water intake process, internal circulation process, drainage process, and flushing process. S1: Water Inlet Process: Wastewater enters the branch pipeline through the main inlet pipeline. The opening of the electric ball valve is adjusted by the feedback signal from the flow meter on the branch pipeline to ensure that the wastewater in the main inlet pipeline flows evenly to each reactor in the reaction unit. The outlets of the reactors merge into the main outlet pipeline at the top and flow into the gas collection device. When the wastewater is collected in the gas collection device, the liquid level rises to the position of the liquid level sensor. The liquid level sensor feeds back the signal to the control cabinet to complete the water inlet process. S2: Internal circulation process: The control cabinet of the high-salt wastewater treatment device receives the signal from the liquid level sensor in the gas collection device and starts the internal circulation process pipeline. The gas collection device draws the combined wastewater into the radiator, and the radiator then draws the cooled wastewater into the inlet of the main water inlet pipeline. The reaction unit treats the wastewater to realize the internal circulation of wastewater. The exhaust gas generated during the circulation process is absorbed, diluted and discharged through the gas collection device. S3: Drainage process: When the reaction continues and the COD of the wastewater is reduced to the required value, the water quality parameter detection instrument will transmit the signal to the control cabinet. The control cabinet will control the electric ball valve of the reaction unit to close and start the drainage ball valve. The wastewater that has completed the reaction will be discharged through the drainage pipeline by the magnetic pump. S4: Flushing process: The control cabinet starts the flushing process, injects the cleaning liquid into the reactor and discharges it through the magnetic pump, thereby flushing the crystallized salt and impurities in the pipeline system.

6. The high-salinity wastewater treatment device according to claim 5, characterized in that: The water quality parameter detection instrument samples and processes high-salinity wastewater through a sampling inlet valve and a sampling outlet valve, and performs COD, pH, temperature, conductivity and ORP detection on the high-salinity wastewater.

7. The high-salinity wastewater treatment device according to claim 1, characterized in that: The reactor is equipped with an ultraviolet advanced oxidation device, which includes a lamp tube sealing welded tube, a lamp tube lock nut, an ultraviolet lamp, a quartz tube, and a bottom movable protective bracket. A quartz tube is provided on the outside of the ultraviolet lamp. The ultraviolet lamp and the quartz tube are inserted into the inside of the reactor body. The top is fixedly connected to the lamp tube sealing welded tube by the lamp tube lock nut, and the bottom is fixed by the bottom movable protective bracket located inside the reactor.

8. The high-salinity wastewater treatment device according to claim 7, characterized in that: The lamp tube sealing welded tube is welded and sealed to the flange and cylinder at the end of the reactor. A lamp tube sealing ring is provided between the quartz tube and the lamp tube sealing welded tube. The ultraviolet lamp tube and the lamp tube lock nut are fixed and sealed by threads.

9. The high-salinity wastewater treatment device according to claim 7, characterized in that: The bottom of the quartz tube is inserted into the opening of the bottom movable protective bracket. A silicone protective sleeve is provided at the opening to prevent water flow from impacting the quartz tube. The bottom movable protective bracket is provided with a threaded opening and is fixedly connected to the bottom fixed protective bracket by bolts. The bottom fixed protective bracket is fixedly installed inside the reactor.

10. The high-salinity wastewater treatment device according to claim 7, characterized in that: The electrochemical oxidation device includes multiple electrodes, which are isolated from each other by silicone pads. The upper and lower ends of the multiple electrodes are fixed by upper electrode connecting flanges and lower electrode connecting flanges, respectively. The electrochemical oxidation device is fixed to the lower connecting flange of the cylinder by connecting screws.

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