A low temperature plasma sewage treatment device

Abstract

The invention discloses a low-temperature plasma sewage treatment device, which relates to the technical field of sewage treatment, and comprises a discharge device and a water purification reaction box. Flow-increasing plates are fixedly installed at the upper and lower ends of the discharge device, and high-voltage discharge needle electrodes with gradient distribution are fixedly installed between the flow-increasing plates. A mixed reaction component is arranged in a water storage reaction part. The required gas material is ordinary air, and the cost is greatly reduced compared with the traditional use of pure oxygen. The high-voltage discharge needle electrodes adopt high-voltage discharge needle electrodes with different lengths with gradient distribution, so that the ionization intensity is gradually enhanced, which will produce a better effect on the ionization of the air, and is more energy-saving, so that the atoms in the gas will produce more ions, which greatly improves the overall efficiency of the discharge device; the mixed reaction component rotates at a high speed to pressurize the sewage in the water storage reaction part, so that the oxygen ions can be more quickly integrated into the sewage in the water storage reaction part, so that the oxygen ion utilization rate is higher, the reaction efficiency is effectively improved, the reaction time is shortened, and the reaction is more sufficient.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a low-temperature plasma sewage treatment device. Background Art

[0002] 82% of the people in my country drink water from shallow wells and rivers, of which 75% have serious water pollution and bacteria exceeding the health standards, and about 160 million people have drinking water contaminated by industrial organic matter. At the same time, a survey shows that there are as many as 2,221 chemical pollutants detected in tap water around the world, some of which are confirmed to be carcinogens or cancer promoters, so it is particularly important to improve the performance of sewage treatment equipment. Discharge plasma technology has been used for pollution control since the 1980s, and has made great progress in the fields of water, waste gas, and solid waste treatment. Especially in water pollution control, low-temperature discharge plasma is considered to be one of the water treatment technologies with the greatest development potential.

[0003] CN202020414921.3 discloses a plasma sewage treatment device, which increases the content of free radical O in the plasma zone by introducing oxygen into the sewage, and adds an insulating catalytic carrier with a catalytic layer in the plasma zone to accelerate its oxidation rate, thereby ensuring the speed and effect of sewage treatment. However, it usually requires the use of pure oxygen as a gas source, and has high requirements on the material of the ionized gas. In addition, in order to improve the degree of ionization of the gas, the gas in the discharge device needs to be treated for a long time, which is costly and inefficient. At the same time, the generated precipitate cannot be effectively removed during the sewage treatment process, and there are still a large number of impurities in the purified water. In addition, there are problems such as slow reaction time and insufficient reaction in the reaction stage. Therefore, it is urgent for those skilled in the art to design a new type of low-temperature plasma sewage treatment device. Summary of the invention

[0004] The problem to be solved by the present invention is that a flow-increasing plate can effectively increase the current and electrodes at both ends of the ion generator, and the upper and lower flow-increasing plates generate a high-voltage electric field. Under the discharge action of the high-voltage discharge needle electrode, the gas in the air will become plasma. The required gas material is ordinary air, and the cost is greatly reduced compared with the traditional use of pure oxygen. The high-voltage discharge needle electrode adopts high-voltage discharge needle electrodes of different lengths with a gradient distribution, so that the ionization intensity is gradually enhanced, which will produce a better effect on the ionization of the air, so that the atoms in the gas will produce more ions, greatly improving the overall efficiency of the discharge device; the mixed reaction component rotates at a high speed to pressurize the sewage in the water storage reaction part, so that the oxygen ions can be more quickly integrated into the sewage in the water storage reaction part, so that the utilization rate of oxygen ions is higher, the reaction efficiency is effectively improved, the reaction time is greatly shortened, and the reaction is more sufficient in the low-temperature plasma sewage treatment device.

[0005] In order to solve the above problems, the present invention provides a low-temperature plasma sewage treatment device, including a discharge device and a water purification reaction box, one end of the discharge device is connected to the water purification reaction box through a reaction tube, and flow-increasing plates are fixedly installed at the upper and lower ends of the discharge device, and high-voltage discharge needle electrodes with a gradient distribution are fixedly installed between the flow-increasing plates. The water purification reaction box is provided with two parts, a water storage reaction part is provided at the upper end, and a sediment filtering part is provided at the lower end. The water storage reaction part and the sediment filtering part are separated by an anti-corrosion plate, and a mixing reaction component is provided in the water storage reaction part.

[0006] Preferably, the discharge device includes an ion generator and an insulating tube, the ion generator is arranged in the insulating tube, the flow increasing plates are arranged at the upper and lower ends of the ion generator, one end of the ion generator is provided with an air inlet, and the other end is connected to the reaction tube to transmit the active particles generated after ionization.

[0007] Preferably, the high-voltage discharge needle electrodes increase in a gradient from left to right, and a gap is left between the longest high-voltage discharge needle electrode and the metal plate disposed at the lower end.

[0008] Preferably, the mixing reaction assembly comprises a rotating motor, a coupling, a rotating shaft and a mixing plate, the base of the rotating motor is fixed on the box wall at one end of the water storage reaction part, one end of the rotating motor is transmission-connected to the rotating shaft through a coupling, a mixing plate is fixedly sleeved on the rotating shaft, and a mixing hole is opened on the mixing plate.

[0009] Preferably, a screen changing door is provided at a side end of the sediment filter portion, the filter screen is inserted into a slot in the sediment filter portion, and a water outlet is provided at a side end of the sediment filter portion.

[0010] Preferably, a water inlet and an air outlet are provided on the water storage reaction part, and a valve is installed on the water inlet.

[0011] Preferably, the water storage reaction unit is equipped with a water quality detector.

[0012] Preferably, a sealing valve is installed on the anti-corrosion plate, and the sealing valve is a solenoid valve.

[0013] Preferably, the insulating cylinder and the anti-corrosion plate are both made of organic glass.

[0014] Preferably, the flow increasing plate is formed by metal casting into an integrally formed structure.

[0015] The above structure has the following beneficial effects:

[0016] The discharge device of the present invention is fixedly provided with flow-increasing plates at the upper and lower ends. The flow-increasing plates can effectively increase the current and electrodes at the two ends of the ion generator. The upper and lower flow-increasing plates generate a high-voltage electric field. Under the discharge action of the high-voltage discharge needle electrode, the gas in the air is converted into plasma. The required gas material is ordinary air, which greatly reduces the cost compared with the traditional use of pure oxygen; high-voltage discharge needle electrodes with gradient distribution are fixedly provided between the flow-increasing plates. The high-voltage discharge needle electrodes use high-voltage discharge needle electrodes of different lengths with gradient distribution, so that the ionization intensity is gradually enhanced, which will produce a better effect on the ionization of the air and is more energy-efficient, so that the atoms in the gas will produce more ions, greatly improving the overall efficiency of the discharge device; the water purification reaction box is provided with two parts A water storage reaction part is provided at the upper end, and a sediment filtering part is provided at the lower end. A screen changing door is provided at the side end of the sediment filtering part. The filter screen is inserted into the card slot in the sediment filtering part. When a lot of sediment is accumulated on the filter screen, the screen changing door can be opened to take out the filter screen for cleaning, which can effectively avoid blockage caused by sediment accumulation on the filter screen; the water storage reaction part and the sediment filtering part are separated by an anti-corrosion plate, and a mixed reaction component is provided in the water storage reaction part. The high-speed rotation of the mixed reaction component allows the sewage in the water storage reaction part to react better with the plasma gas, so that the oxygen ions can be more quickly integrated into the sewage in the water storage reaction part, so that the utilization rate of oxygen ions is higher, the reaction efficiency is effectively improved, the reaction time is greatly shortened, and the reaction is more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the low-temperature plasma sewage treatment device of the present invention.

[0018] Figure 2 Schematic diagram of the structure of the mixed reaction component.

[0019] In the figure: 1-discharge device, 101-current increasing plate, 102-high-voltage discharge needle electrode, 103-ion generator, 104-insulating cylinder, 105-air inlet, 2-water purification reaction box, 201-water storage reaction part, 202-sediment filtration part, 203-anti-corrosion plate, 204-mixing reaction component, 205-rotating motor, 206-coupling, 207-rotating shaft, 208-mixing plate, 209-mixing hole, 210-net changing door, 211-filter net, 212-water outlet, 213-water inlet, 214-air outlet, 215-valve, 216-water quality detector, 217-sealing valve, 3-reaction tube. DETAILED DESCRIPTION

[0020] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

[0021] A low-temperature plasma sewage treatment device comprises a discharge device 1 and a water purification reaction box 2, wherein one end of the discharge device 1 is connected to the water purification reaction box 2 through a reaction tube 3, flow increasing plates 101 are fixedly installed at the upper and lower ends of the discharge device 1, and high-voltage discharge needle electrodes 102 with gradient distribution are fixedly installed between the flow increasing plates 101, and the water purification reaction box 2 is provided with two parts, wherein a water storage reaction part 201 is provided at the upper end, and a sediment filtering part 202 is provided at the lower end, wherein the water storage reaction part 201 and the sediment filtering part 202 are separated by an anti-corrosion plate 203, and a mixing reaction component 204 is provided in the water storage reaction part 201.

[0022] The discharge device 1 includes an ion generator 103 and an insulating tube 104. The ion generator 103 is arranged in the insulating tube 104. The current increasing plate 101 is arranged at the upper and lower ends of the ion generator 103. An air inlet 105 is provided at one end of the ion generator 103, and the other end thereof is connected to the reaction tube 3 so as to transmit the active particles generated after ionization.

[0023] The high-voltage discharge needle electrodes 102 increase in a gradient from left to right, and a gap is left between the longest high-voltage discharge needle electrode 102 and the metal plate disposed at the lower end.

[0024] The mixing reaction component 204 includes a rotating motor 205, a coupling 206, a rotating shaft 207 and a mixing plate 208. The base of the rotating motor 205 is fixed on the box wall at one end of the water storage reaction part 201. One end of the rotating motor 205 is transmission-connected to the rotating shaft 207 through the coupling 206. A mixing plate 208 is fixedly sleeved on the rotating shaft 207, and a mixing hole 209 is opened on the mixing plate 208.

[0025] A screen changing door 210 is provided at the side end of the sediment filter 202 , a filter screen 211 is inserted into a slot in the sediment filter 202 , and a water outlet 212 is provided at the side end of the sediment filter 202 .

[0026] The water storage reaction part 201 is provided with a water inlet 213 and an air outlet 214 , and a valve 215 is installed on the water inlet 213 .

[0027] The water storage reaction part 201 is installed with a water quality detector 216, and the anti-corrosion plate 203 is installed with a sealing valve 217, and the sealing valve 217 is a solenoid valve.

[0028] The insulating cylinder 104 and the anti-corrosion plate 203 are both made of organic glass, and the flow increasing plate 101 is an integrally formed structure made of metal casting.

[0029] The implementation process of the present invention is mainly divided into the following four stages: sewage collection stage, plasma gas generation stage, sewage purification stage, and clean water discharge stage.

[0030] Sewage collection stage: First, the operator introduces sewage into the water purification reaction box 2 through the water inlet 213. In order to maximize the overall purification efficiency, the water level of the sewage must reach a preset height. When the sewage water level reaches the preset height, the valve 215 at the water inlet 213 is closed, and the mixed reaction component 204 and the discharge device 1 are started to work at the same time;

[0031] Plasma gas generation stage: air is introduced into the ion generator 103 through the air inlet 105, and a high-voltage electric field is formed between the flow enhancement plate 101 and the high-voltage discharge needle electrode 102 in the ion generator 103. The oxygen in the air generates hydroxyl radicals, superoxide anion radicals, hydrogen peroxide, and ozone plasma under the action of the high-voltage electric field. This process mainly utilizes the fact that the gas will become plasma under a strong electric field. Under the action of this high-voltage electric field, the atoms in the gas will have more electrons, thereby forming anions or cations. The discharge plasma can generate highly active substances in the water treatment process to react chemically with pollutants. Among them, hydroxyl radicals have extremely strong oxidizing ability and extremely fast chemical reaction speed, and can quickly and non-selectively oxidize and decompose microorganisms and pollutants in the water, and degrade them into water, carbon dioxide, mineral salts, etc., without producing disinfection by-products;

[0032] Sewage purification stage: Since there is a continuous flow of gas from the air inlet 105 to the ion generator 103, the electrolyzed plasma gas will flow into the sewage along the reaction tube. At this time, the rotating motor 205 of the mixing reaction component 204 drives the rotating shaft 207 to rotate through the coupling 2061, and the mixing plate 208 also rotates with the rotation of the rotating shaft 207. Under the rotation of the rotating shaft 207, the sewage in the water storage reaction part 201 of the water purification reaction box 2 is in a rolling state, which can make the sewage and the plasma gas contact more fully, greatly improving the reaction efficiency, and the excess gas that has not reacted with the sewage will be discharged from the gas outlet 214;

[0033] Clean water discharge stage: After the water quality detector 216 detects that the degree of sewage purification meets the standard, the mixed reaction component 204 and the discharge device 1 stop working, and the sealing valve 217 is opened. The purified water flows through the filter 211, and the impurities in the water are separated by the filter 211 and remain on the filter 211. A certain space is left between the filter 211 and the sealing valve 217. First, it is convenient for the purified water to flow out; second, it is convenient for the storage of impurities. When the impurities in the filter reach a certain level, the filter door 210 is opened, and the filter 211 is taken out for replacement or cleaning, and the purified water flows out from the water outlet 212.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features of the invention described herein.

Claims

1. A low-temperature plasma wastewater treatment device, comprising a discharge device (1) and a water purification reaction box (2), wherein one end of the discharge device (1) is connected to the water purification reaction box (2) via a reaction tube (3), and is characterized in that: The discharge device (1) has flow-increasing plates (101) fixedly mounted at both ends, and high-voltage discharge needle electrodes (102) with a gradient distribution fixedly mounted between the flow-increasing plates (101). The water purification reaction box (2) has two parts, with a water storage reaction part (201) at the upper end and a sediment filtering part (202) at the lower end. The water storage reaction part (201) and the sediment filtering part (202) are separated by an anti-corrosion plate (203). A mixing reaction component (204) is arranged in the water storage reaction part (201); The discharge device (1) comprises an ion generator (103) and an insulating cylinder (104), the ion generator (103) being arranged in the insulating cylinder (104), the flow increasing plates (101) being arranged at the upper and lower ends of the ion generator (103), one end of the ion generator (103) being provided with an air inlet (105), and the other end thereof being connected to a reaction tube (3) so as to transmit active particles generated after ionization; The high-voltage discharge needle electrodes (102) increase in gradient from left to right, with a gap between the longest high-voltage discharge needle electrode (102) and the metal plate provided at the lower end; the current increasing plate (101) is cast from metal into an integrally formed structure.

2. The low-temperature plasma wastewater treatment device according to claim 1 is characterized in that: The mixing reaction component (204) comprises a rotating motor (205), a coupling (206), a rotating shaft (207) and a mixing plate (208); the base of the rotating motor (205) is fixed to the box wall at one end of the water storage reaction part (201); one end of the rotating motor (205) is transmission-connected to the rotating shaft (207) via the coupling (206); the mixing plate (208) is fixedly sleeved on the rotating shaft (207); and the mixing plate (208) is provided with a mixing hole (209).

3. The low-temperature plasma wastewater treatment device according to claim 1, characterized in that: A screen changing door (210) is provided at a side end of the sediment filter portion (202); a filter screen (211) is inserted into a slot in the sediment filter portion (202); and a water outlet (212) is provided at a side end of the sediment filter portion (202).

4. The low-temperature plasma wastewater treatment device according to claim 1, characterized in that: The water storage reaction part (201) is provided with a water inlet (213) and an air outlet (214), and a valve (215) is installed on the water inlet (213).

5. The low-temperature plasma wastewater treatment device according to claim 1, characterized in that: The water storage reaction unit (201) is equipped with a water quality detector (216).

6. The low-temperature plasma wastewater treatment device according to claim 1, characterized in that: A sealing valve (217) is installed on the anti-corrosion plate (203), and the sealing valve (217) is a solenoid valve.

7. The low-temperature plasma wastewater treatment device according to claim 1 is characterized in that: The insulating cylinder (104) and the anti-corrosion plate (203) are both made of organic glass.

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