Sewage treatment device for engine production line

Abstract

The invention relates to a sewage treatment device for an engine production line. The sewage treatment device comprises a sewage storage system, a liquid conveying system, an electrolysis system and a heat dissipation assembly, the sewage storage system comprises a liquid storage tank, a liquid level detection device, an inflammable gas detection device and a gas discharge device; the liquid conveying system conveys sewage in the liquid storage tank into the electrolysis assembly through a pipeline for electrolytic oxidation treatment; the electrolysis assembly is formed by connecting a series of electrolysis units in parallel in a press filter mode, and an electrolysis unit expandable structure is formed. The device disclosed by the invention can be expanded according to the concentration, volume and treatment time of sewage, can avoid aggregation of polymers in a solution on a polar plate by adopting a circulating electrolysis mode, improves the electrolysis efficiency, and has the advantages of modularization, simplicity in operation, compact structure, small occupied area and high electrolysis efficiency.

Description

Technical Field

[0001] The invention relates to the field of environmental protection, and in particular to a sewage treatment device for an engine production line. Background Art

[0002] A large amount of water is required in the engine manufacturing process, such as pre-treatment cleaning of workpieces in the paint shop, product painting, oil separation and oil removal, etc. During the production process, pre-treatment agents and paint residues are mixed into the water, which needs to be treated and qualified before it can be discharged. With the continuous tightening of environmental protection policies, the treatment of industrial wastewater is also an important task for enterprises.

[0003] The wastewater from the engine production line contains a large amount of cleaning agents, engine oil, ethylene glycol, heavy metal elements, etc. These wastewaters will cause water hypoxia, deteriorate the water body, and destroy the water balance; heavy metals are often toxic. If the wastewater is directly discharged into the natural environment, it will pollute the living water source, and in serious cases even cause harm to people's health.

[0004] Sewage treatment can be divided into physical, chemical and biological methods according to different process routes and methods. The physical method uses mechanical force or filter nets to separate suspended matter, oil and floating matter in sewage from water; the chemical method uses neutralization, oxidation-reduction, coagulation and other effects to change the chemical properties and physical forms of pollutants in water. The biological method uses the metabolism of microorganisms to decompose organic matter and certain toxic substances in water and transform them into stable or harmless substances. In recent years, some advanced oxidation processes (AOPs) have also emerged, such as the Fenton process, O3 / UV, H2O2 / UV, etc. Electrochemical oxidation has been widely used because it does not involve the transportation of chemicals and sludge treatment.

[0005] The electrochemical oxidation method uses direct oxidation and indirect oxidation to decompose or transform organic dissolved matter and some toxic substances in sewage, so that sewage can be harmlessly treated. The carrier of electrochemical oxidation is an electrolytic device. Patent No. CN112813462 A separates an electrolytic cell for copper ion recovery. By setting an addition tank and a drainage tank on the electrolytic cell, the concentration of copper ions in the solution is maintained, and the reduction rate of copper ions is increased; Patent No. CN 214611688U discloses a sewage electrolysis device to prevent plate passivation, and the cavitation effect of ultrasound is used to remove the passivation layer on the surface of the plate, thereby ensuring the continuous operation of the electrolytic equipment and improving the utilization rate of the plate. The above-mentioned electrolytic devices all use the "electrostatic solution" method, and the electrolyte cannot flow in the equipment, which brings two adverse consequences. On the one hand, the electrolyte near the plate is preferentially electrolyzed, which reduces the concentration of the solution near the plate, resulting in a decrease in electrolysis efficiency; on the other hand, the reducing substances in the electrolyte scale on the surface of the plate, reducing the reaction area of ​​the plate. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides an engine production line sewage treatment device, which can be expanded according to sewage concentration, volume and treatment time, and can improve electrolysis efficiency.

[0007] The present invention provides a sewage treatment device for an engine production line.

[0008] It includes a sewage collection system, a liquid infusion system, an electrolysis system and a heat dissipation component; the sewage collection system includes a liquid storage tank, a liquid level detection device, a gas detection device and a gas discharge device; the liquid infusion system transports the sewage in the liquid storage tank to the electrolysis system through a pipeline for electrolytic oxidation treatment; the heat dissipation component is installed behind the electrolysis system;

[0009] The electrolysis system includes an electrolysis assembly, which is composed of a series of electrolysis units connected in parallel in the form of a filter press to form an expandable electrolysis unit structure, and a bionic pulsating pump module is connected in series below the electrolysis assembly. The bionic pulsating pump module simulates the periodic pressure output of heart contraction-diastole and sends pulse pressure to the solution in each electrolysis unit;

[0010] The electrolysis unit is a sealed cavity structure including anode and cathode plates. Each electrolysis unit is provided with an ultrasonic cavitation coupling unit. The ultrasonic cavitation coupling unit includes an integrated high-frequency ultrasonic transducer to generate ultrasonic pulses, triggering the generation of cavitation bubbles on the surface of the plate.

[0011] The gas detection device of the sewage collection system is a hydrogen chlorine gas monitor installed on the top of the liquid storage tank; the liquid level detection device is a liquid level meter installed on the side wall of the liquid storage tank, which is used to monitor the liquid level in real time; the gas exhaust device is a ventilation fan, and when the gas detection device detects that the hydrogen chlorine gas content exceeds the standard, the ventilation fan is turned on to exhaust the flammable gas in the liquid storage tank.

[0012] Furthermore, the liquid storage tank of the sewage collection system is made of plastic; and the pipes are connected by pipes made of PVC material.

[0013] Furthermore, the bionic pulsating pump module adopts a multi-layer elastic membrane cavity structure and a built-in piezoelectric ceramic array driver with a frequency response range of 1-50Hz, simulating the periodic pressure output of heart contraction and relaxation.

[0014] Furthermore, the electrolysis unit includes a first end plate, an anode plate, a first sealing gasket, a solution chamber, a second sealing gasket, a cathode plate and a second end plate. The electrolysis unit is fixed by a long screw with a fixing pressure of 20 to 30 KPa.

[0015] Furthermore, the two end plates are acrylic plates, the anode plate is a titanium-based oxide of Ti / IrO2-RuO2, and the cathode plate is stainless steel; the two sealing gaskets are made of fluororubber material with corrosion resistance, high temperature resistance and aging resistance. The two end plates closest to the edge of the electrolytic assembly are processed with reinforcing ribs to increase the rigidity of the end plates, make the end plates evenly stressed, and prevent local leakage of the solution. The end plate in the middle of the electrolysis unit has no reinforcing ribs.

[0016] Furthermore, the solution cavity separates the anode plate and the cathode plate, the thickness of the solution cavity is the distance between the anode plate and the cathode plate, and the distance between the plates ranges from 20 to 25 mm; the solution cavity is made of insulating high temperature resistant material and is processed from acrylic plate.

[0017] Furthermore, the ultrasonic cavitation coupling unit has an operating frequency of 1 MHz and a power density of 0.5-2 W / cm2, generating continuously controllable cavitation bubbles with a cavitation bubble diameter of 10-50 μm, which is controlled by adjusting the duty cycle. The pulse period of the ultrasonic cavitation coupling unit and the pressure wave phase difference are set to π / 2 to form a coordinated disturbance.

[0018] Furthermore, the ultrasonic cavitation coupling unit establishes a coordinated timing of cavitation first and then flushing. After the ultrasonic pulse triggers the generation of cavitation bubbles, the bionic pulsating pump module is started after a delay of 0.05ms to generate a positive pressure wave pulse to accelerate the detachment of bubbles, and the negative pressure wave stage recovers the energy of the ruptured bubbles.

[0019] Furthermore, the heat dissipation component uses an air cooling mode to cool the electrolyte, dense fins are distributed on the heat dissipation component, and a fan is arranged on the back to enhance the heat dissipation effect.

[0020] Compared with the prior art, the present invention can expand capacity according to sewage concentration, volume and treatment time. The adoption of a cyclic electrolysis mode can avoid the aggregation of polymers in the solution on the electrode plates, thereby improving the electrolysis efficiency. It has the advantages of modularity, simple operation, compact structure, small footprint and high electrolysis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a view of a sewage treatment device for an engine production line according to an embodiment of the present invention.

[0022] Figure 2 This is a flow chart of a wastewater treatment device for an engine production line according to an embodiment of the present invention.

[0023] Figure 3 1 is an exploded view of an electrolytic component according to an embodiment of the present invention.

[0024] Figure 4 Schematic diagram of an electrolytic unit according to an embodiment of the present invention.

[0025] Figure 5 These are views of the sewage collection system of the present invention.

[0026] in:

[0027] 100—wastewater collection system; 200—bionic pulsating pump module; 300—electrolysis system; 400—heat dissipation component; 101—liquid storage tank; 102—liquid outlet; 103—gas detection device; 104—gas discharge device; 105—liquid inlet; 106—liquid level meter; 301—electrolysis unit; 302—electrolysis component; 3011—first end plate; 3012—anode plate; 3013—first sealing gasket; 3014—solution cavity; 3015—ultrasonic cavitation coupling unit; 3016—second sealing gasket; 3017—cathode plate; 3018—second end plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0029] The sewage treatment device of the engine production line according to the embodiment of the present invention comprises a sewage receiving system 100, an infusion system, an electrolysis system 300 and a heat dissipation assembly 400; the sewage receiving system 100 comprises a liquid storage tank 101, a liquid level detection device, a gas detection device 103 and a gas discharge device 104; the liquid storage tank 101 is made of plastic; and the pipeline is connected by a pipe made of PVC material. The infusion system transports the sewage in the liquid storage tank 101 to the electrolysis system 300 through a pipeline for electrolytic oxidation treatment; the heat dissipation component 400 is installed behind the electrolysis system 300; the electrolysis system 300 includes an electrolysis component 302, which is composed of a series of electrolysis units 301 connected in parallel in the form of a filter press to form an expandable structure of the electrolysis unit 301, and a bionic pulsating pump module 200 is connected in series below the electrolysis component 302. The bionic pulsating pump module 200 simulates the periodic pressure output of the heart contraction-diastole and sends pulse pressure to the solution in each electrolysis unit 301; the electrolysis unit 301 is a sealed unit including a positive and negative electrode plates. Cavity structure, each electrolysis unit 301 is provided with an ultrasonic cavitation coupling unit 3015, the ultrasonic cavitation coupling unit 3015 includes an integrated high-frequency ultrasonic transducer to generate ultrasonic pulses, triggering cavitation bubbles to be generated on the surface of the plate; the gas detection device 103 of the sewage collection system 101 is a hydrogen chlorine gas monitor, which is installed on the top of the liquid storage tank 101; the liquid level detection device is a liquid level meter 106 installed on the side wall of the liquid storage tank 101, which is used to monitor the liquid level in real time; the gas exhaust device 104 is a ventilation fan, when the gas detection device 103 detects that the hydrogen chlorine content exceeds the standard, the ventilation fan is turned on to discharge the flammable gas in the liquid storage tank 101.

[0030] In this embodiment, the bionic pulsating pump module 200 adopts a multi-layer elastic membrane cavity structure and a built-in piezoelectric ceramic array driver, with a frequency response range of 1-50Hz, simulating the periodic pressure output of cardiac contraction-diastole. Working parameters: basic pulsation frequency: 5-10Hz (adjustable), pressure amplitude: 0.5-3kPa (matching electrolyte viscosity), waveform mode: supports sine wave, square wave, and custom waveform (matching non-Newtonian fluid characteristics through Fourier synthesis).

[0031] In this embodiment, the electrolysis unit 301 includes a first end plate 3011, an anode plate 3012, a first sealing gasket 3013, a solution chamber 3014, a second sealing gasket 3016, a cathode plate 3017 and a second end plate 3018. The electrolysis unit 301 is fixed by a long screw with a fixing pressure of 20 to 30 KPa. The end plate is an acrylic plate, the anode plate is a titanium-based oxide Ti / IrO2-RuO2, and the cathode plate is stainless steel; the sealing gasket is a fluororubber material with corrosion resistance, high temperature resistance and aging resistance. The two end plates closest to the edge of the electrolysis assembly are processed with reinforcing ribs to increase the rigidity of the end plate, so that the end plate is evenly stressed and prevents local leakage of the solution. The end plate in the middle of the electrolysis has no reinforcing ribs. The solution chamber separates the anode plate and the cathode plate. The thickness of the solution chamber is the distance between the anode plate and the cathode plate. The distance between the plates ranges from 20 to 25 mm. The solution chamber is made of insulating and high temperature resistant material and is processed from an acrylic plate.

[0032] The ultrasonic cavitation coupling unit has an operating frequency of 1MHz and a power density of 0.5-2W / cm2, and produces continuous and controllable cavitation bubbles with a diameter of 10-50μm. The cavitation bubbles are controlled by adjusting the duty cycle. The pulse period of the ultrasonic cavitation coupling unit and the pressure wave phase difference are set to π / 2 to form a coordinated disturbance. The ultrasonic cavitation coupling unit has a coordinated timing of cavitation first and then flushing. After the ultrasonic pulse triggers the generation of cavitation bubbles, the bionic pulsating pump module is started after a delay of 0.05ms to generate a positive pulse of the pressure wave, accelerate the detachment of the bubbles, and recover the energy of the broken bubbles in the negative pressure wave stage. The average residence time of the bubbles: shortened from 12.3ms to 3.8ms (high-speed video measurement), the electrode surface coverage: reduced from 35% to 9% (laser scanning imaging).

[0033] When the embodiment of the present invention is working, the sewage in the liquid storage tank 101 is transported to the electrolysis system 300 through the pipeline system by the suction and pressurization of the bionic pulsating pump module 200. The electrolysis assembly 300 is composed of a series of electrolysis units 301 connected in series to form an electrolysis assembly 302 and fixed by a long screw. The screw fixing pressure is 20 to 30 KPa. The anode plate 3012 in the electrolysis assembly 302 is connected to the positive pole of the DC power supply, and the cathode plate 3017 is connected to the negative pole of the DC power supply. After the sewage enters the electrolysis system 300, the DC power supply is turned on, and the current flows from the anode plate 3012 to the cathode plate 3017.

[0034] After the electrolysis system 300 is powered on, the organic matter in the sewage is oxidized and degraded through direct oxidation on the surface of the anode plate 3012 and indirect oxidation in the solution.

[0035] Direct oxidation is R→P+e-, where R is the organic pollutant and P is the oxidative degradation product.

[0036] Indirect oxidation: 2Cl-→Cl2+2e-

[0037] Cl2+H2O→HOCl+H++Cl-

[0038] 2H2O→2H2+O2

[0039] After the sewage is electrolyzed, its temperature rises and flows through the heat dissipation component 400 through the pipeline system. The heat dissipation component 400 is provided with dense fins and a fan is arranged at the back to enhance the heat dissipation effect and cool the electrolyte through the air cooling mode.

[0040] After the sewage electrolyte is cooled by the heat dissipation component 400, it returns to the liquid storage tank 101 through the liquid inlet 105. The height and color change of the sewage surface in the liquid storage tank 101 can be observed through the liquid level meter 106. Since Cl2 and H2 are produced during the electrolysis process, these gases are flammable and toxic. The gas detection device 103 is installed on the top of the liquid storage tank 101. The gas detection device 103 can detect the concentration of flammable gas in the liquid storage tank 101. The gas detection device 103 is selected as MTL GasKK650 with a detection accuracy of 0.1%. When the concentration exceeds the threshold, the gas exhaust device 104 on the top of the liquid storage tank 101 works to discharge the flammable gas.

[0041] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An engine production line sewage treatment device, characterized by: It includes a sewage collection system, a liquid infusion system, an electrolysis system and a heat dissipation component; the sewage collection system includes a liquid storage tank, a liquid level detection device, a gas detection device and a gas discharge device; the liquid infusion system transports the sewage in the liquid storage tank to the electrolysis system through a pipeline for electrolytic oxidation treatment; the heat dissipation component is installed behind the electrolysis system; The electrolysis system includes an electrolysis assembly, which is composed of a series of electrolysis units connected in parallel in the form of a filter press to form an expandable electrolysis unit structure, and a bionic pulsating pump module is connected in series below the electrolysis assembly. The bionic pulsating pump module simulates the periodic pressure output of heart contraction-diastole and sends pulse pressure to the solution in each electrolysis unit; The electrolysis unit is a sealed cavity structure including anode and cathode plates. Each electrolysis unit is provided with an ultrasonic cavitation coupling unit. The ultrasonic cavitation coupling unit includes an integrated high-frequency ultrasonic transducer to generate ultrasonic pulses, triggering the generation of cavitation bubbles on the surface of the plate. The gas detection device of the sewage collection system is a hydrogen chlorine gas monitor installed on the top of the liquid storage tank; the liquid level detection device is a liquid level meter installed on the side wall of the liquid storage tank, which is used to monitor the liquid level in real time; the gas exhaust device is a ventilation fan, and when the gas detection device detects that the hydrogen chlorine gas content exceeds the standard, the ventilation fan is turned on to exhaust the flammable gas in the liquid storage tank.

2. The engine production line sewage treatment device according to claim 1 is characterized by: The bionic pulsating pump module adopts a multi-layer elastic membrane cavity structure and a built-in piezoelectric ceramic array driver with a frequency response range of 1-50Hz, simulating the periodic pressure output of heart contraction and relaxation.

3. The engine production line sewage treatment device according to claim 1 is characterized by: The electrolysis unit comprises a first end plate, an anode plate, a first sealing gasket, a solution chamber, a second sealing gasket, a cathode plate and a second end plate. The electrolysis unit is fixed by a long screw with a fixing pressure of 20 to 30 KPa.

4. The engine production line sewage treatment device according to claim 3 is characterized by: The two end plates are made of acrylic plates, the anode plate is made of titanium-based oxide Ti / IrO2-RuO2, and the cathode plate is made of stainless steel; the two sealing gaskets are made of fluororubber material that is corrosion-resistant, high-temperature-resistant and aging-resistant, and reinforcing ribs are processed on the two end plates closest to the edge of the electrolytic assembly to make the end plates evenly stressed and prevent local leakage of the solution.

5. The engine production line sewage treatment device according to claim 3 is characterized by: The solution cavity separates the anode plate from the cathode plate. The thickness of the solution cavity is the distance between the anode plate and the cathode plate. The distance between the plates ranges from 20 to 25 mm. The solution cavity is made of insulating high temperature resistant material and is processed from acrylic plate.

6. The engine production line sewage treatment device according to claim 1 is characterized by: The ultrasonic cavitation coupling unit has an operating frequency of 1 MHz and a power density of 0.5-2 W / cm2, and produces continuously controllable cavitation bubbles with a diameter of 10-50 μm, which are controlled by adjusting the duty cycle. The pulse period of the ultrasonic cavitation coupling unit and the pressure wave phase difference are set to π / 2 to form a coordinated disturbance.

7. The engine production line sewage treatment device according to claim 6 is characterized by: The ultrasonic cavitation coupling unit establishes a coordinated timing of cavitation first and then flushing. After the ultrasonic pulse triggers the generation of cavitation bubbles, the bionic pulsating pump module is started after a delay of 0.05ms to generate a positive pressure wave pulse to accelerate the detachment of bubbles, and the negative pressure wave stage recovers the energy of the ruptured bubbles.

8. The engine production line sewage treatment device according to claim 1 is characterized by: The liquid storage tank of the sewage collection system is made of plastic; the pipes are connected by pipes made of PVC material.

9. The engine production line sewage treatment device according to claim 1, characterized in that: The heat dissipation component adopts an air cooling mode to cool the electrolyte. Dense fins are distributed on the heat dissipation component, and a fan is arranged at the back to enhance the heat dissipation effect.

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