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CN-118878015-B - Equipment and method for degrading industrial wastewater by double functions of plasma adsorption

CN118878015BCN 118878015 BCN118878015 BCN 118878015BCN-118878015-B

Abstract

The invention relates to equipment and a method for degrading industrial wastewater by double functions of plasma adsorption, and belongs to the technical field of environmental protection. The invention can synchronously carry out adsorption and desorption, improves the production efficiency, greatly reduces the power consumption and the electrode loss, and realizes the treatment of high-concentration and large-flow sewage. The invention has excellent treatment depth, the oxidation potential of plasma discharge can easily reach more than 20 electron volts, and the fluorine with the highest oxidation potential in chemical substances also has the oxidation potential of 3.2 electron volts, and the higher oxidation potential means better treatment effect. The operation is carried out at normal temperature and normal pressure, and the operation cost is low. The invention is suitable for treating organic wastewater by plasma discharge, is suitable for most water quality (no requirement on PH value, salinity and ammonia nitrogen of water), and has excellent technical universality. The traditional adsorption technology can not avoid the generation of a large amount of solid waste, has high treatment difficulty and treatment cost, and becomes an industry pain point. The invention improves the degradation efficiency of organic matters, reduces the energy consumption and simultaneously avoids the generation of solid wastes.

Inventors

  • HONG ZHONGWEI
  • DAI YANG
  • WAN LIANGHAO
  • ZHOU JIANGHUA

Assignees

  • 南京苏曼等离子科技有限公司
  • 洪忠伟

Dates

Publication Date
20260508
Application Date
20240729

Claims (8)

  1. 1. The method for degrading industrial wastewater by double functions of plasma adsorption is characterized by comprising the following steps of: (1) Adding industrial wastewater into a vertical water tank (1), controlling the water line to be at half height, wherein one of an upper fixed pulley and a lower fixed pulley of a pulley block (3) is higher than the water surface, and the other is immersed in water, and the fiber cloth on the pulley block (3) is also at half water and at half water; (2) The pulley block (3) is driven to rotate by a motor, the linear speed of the fixed pulley is 0.5cm-5 cm/s, the fiber cloth on one side rises out of the water surface, the fiber cloth on the other side sinks into the water, and at the moment, the flat plate electrode group (4) is connected with a plasma power supply; (3) The fiber cloth belt above the water surface has a small amount of water, and can effectively decompose organic matters in the wastewater when receiving plasma discharge; (4) The fiber cloth immersed in the water is subjected to plasma discharge before being immersed in the water, so that the surface energy of the fiber cloth is effectively improved, and the capability of adsorbing organic matters of the fiber cloth is greatly improved; In this way, the fiber cloth on both sides of the fixed pulley is subjected to plasma discharge adsorption on one side and the other side is subjected to plasma discharge degradation of the adsorbed organic matters, so that the organic matters are synchronously adsorbed and desorbed and are circularly reciprocated, and the aim of finally degrading the organic matters is fulfilled; (5) And after the discharge standard is reached, the plasma power supply is turned off, the motor is stopped, the drain valve is turned on, and the wastewater reaching the standard is discharged.
  2. 2. The method for degrading industrial wastewater by dual action of plasma adsorption according to claim 1, comprising the following steps: step1, preparing a neutral solution which has the mass concentration of 0.1% -0.3%, the pH value of 7 and does not contain salt from a nonionic flocculant polyacrylamide for standby; Step 2, injecting the prepared solution into a vertical water tank (1) according to the actual required amount, and mixing with organic pollutant wastewater; step 3, starting a motor to drive a fixed pulley to rotate, wherein the linear speed of the fixed pulley is 0.5cm-5 cm/s, and the glass fiber cloth on two sides of the fixed pulley is submerged while rising out of the water surface, and simultaneously starting a plasma power supply to realize plasma dielectric barrier discharge; The glass fiber cloth is subjected to plasma discharge, and a large amount of charges are generated on the surface of the glass fiber cloth, so that the water absorption and the oil absorption of the glass fiber cloth are greatly improved; And 4, synchronously achieving the double effects of effective pollutant degradation and plasma desorption of the glass fiber cloth in the subsequent plasma discharge by the glass fiber cloth adsorbed with the organic pollutants in the solution.
  3. 3. The plasma adsorption dual-effect industrial wastewater degradation equipment using the method of claim 1 is characterized by comprising a vertical water tank (1), a T-shaped fixed support (2), a pulley block (3) and a flat electrode group (4), wherein the vertical water tank (1) is made of engineering plastic, the T-shaped fixed support (2) is inversely installed at the middle bottom of the vertical water tank (1), the pulley block (3) is composed of an upper fixed pulley and a lower fixed pulley and is respectively and fixedly installed on a middle rod of the T-shaped fixed support (2), flexible ropes of the pulley block (3) are fiber cloth, two sides of symmetrical flexible ropes of the pulley block (3) are respectively provided with the flat electrode group (4), the flat electrode group (4) is connected with an alternating current power supply, the number of the flat electrode groups (4) is 2, the flat electrode groups are fixed on the side wall above the vertical water tank (1), and gaps between the flat electrode group (4) and a glass fiber cloth surface are 2 mm-4 mm.
  4. 4. The plasma adsorption dual-function industrial wastewater degradation device according to claim 3, wherein a fixed pulley is arranged at the center line of the engineering plastic vertical water tank (1) respectively, the edge of the fixed pulley is higher than the position where the glass fiber cloth is arranged in the middle, a fixed pulley shaft is fixed in a corresponding round hole on the T-shaped fixed support (2), the glass fiber cloth is hung on the fixed pulley to be fixed and moderately elastic, and in addition, flat plate electrodes are symmetrically arranged at two sides of the glass fiber cloth which is tightly clung to the two sides of the fixed pulley.
  5. 5. The plasma adsorption dual-action industrial wastewater degradation device according to claim 3, wherein one fixed pulley of the pulley block (3) is a driving pulley and the other fixed pulley is a driven pulley.
  6. 6. The plasma adsorption dual-action industrial wastewater degradation device according to claim 3, wherein the plate electrode group (4) is fixed through a slot on the wall of the vertical water tank (1).
  7. 7. The apparatus for degrading industrial wastewater by dual action of plasma adsorption as claimed in claim 3, wherein one electrode of the flat plate electrode is connected with positive high-voltage high-frequency electricity, the voltage is 10 KV-20 KV, the frequency is 20 KHz-40 KHz, and the other electrode is connected with negative high-voltage high-frequency electricity, the voltage is 10 KV-20 KV and the frequency is 20 KHz-40 KHz.
  8. 8. The apparatus for degrading industrial wastewater by double action of plasma adsorption according to claim 3, wherein the vertical water tank (1) is provided with a water inlet valve and a water outlet valve, the water inlet valve is arranged at the upper part, and the water outlet valve is arranged at the lower part.

Description

Equipment and method for degrading industrial wastewater by double functions of plasma adsorption Technical Field The invention relates to an industrial wastewater treatment technology, and belongs to the technical field of environmental protection. Background At present, the plasma sewage treatment technology is used for treating printing and dyeing wastewater, pesticide wastewater and medical wastewater as a new water treatment technology. The method has the advantages of normal temperature and pressure, no chemical addition, no three-waste discharge and good treatment effect, and simultaneously has the problems of high power consumption and high liquid-phase electrode loss. Adsorption is a mature technology for treating wastewater, but adsorption is easy to saturate, desorption is difficult, and the adsorption method can only be used for treating low-concentration sewage. The plasma is suitable for treating high-concentration sewage, but has high treatment power consumption, and is only suitable for treating small-flow sewage. Disclosure of Invention In order to solve the problems, the invention provides equipment for treating industrial wastewater by combining plasma with adsorption and a method thereof, the adsorption and the desorption can be synchronously carried out, the production efficiency is improved, the electricity consumption and the electrode loss are greatly reduced, and the treatment of high-concentration and high-flow sewage is realized. In order to solve the technical problems, the technical scheme is that the plasma adsorption dual-function industrial wastewater degradation equipment comprises a vertical water tank (1), T-shaped fixing supports (2), pulley blocks (3) and a flat electrode group (4), wherein the water tank (1) is made of engineering plastic materials, the T-shaped fixing supports (2) are inversely arranged at the middle bottom of the vertical water tank (1), the pulley blocks (3) are composed of an upper fixed pulley and a lower fixed pulley and are respectively and fixedly arranged on middle rods of the T-shaped supports (2), flexible ropes of the pulley blocks (3) are fiber cloth, two sides of symmetrical flexible ropes of the pulley blocks (3) are respectively provided with the flat electrode group (4), the flat electrode groups (4) are connected with an alternating current power supply, the number of the flat electrode groups (4) is 2, the flat electrode groups are fixed on the upper side wall of the vertical water tank (1), and gaps between the flat electrode groups (4) and the fiber cloth surfaces are 2 mm-4 mm. Preferably, a pulley is arranged at the center line position of the engineering plastic water tank (1) up and down, the edge of the pulley is higher than the edge of the pulley, a pulley shaft is fixed in a corresponding round hole on the T-shaped fixed support (2), the pulley is hung on the fiber cloth to be fixed and moderately elastic, and a group of flat electrodes are symmetrically arranged at two sides of the pulley, which are clung to two sides of the hung fiber cloth. Preferably, one fixed pulley of the pulley block (3) is a driving wheel, and the other fixed pulley is a driven wheel. Preferably, the flexible rope of the pulley block (3) is composed of activated carbon fiber cloth, graphite fiber cloth, aluminum silicate fiber cloth or glass fiber cloth. Preferably, the plate electrode (4) is fixed by a slot on the wall of the water tank (1). Preferably, one electrode of the flat plate electrode group (4) is connected with positive high-voltage high-frequency electricity (voltage 10 KV-20 KV, frequency 20K-40K), and the other electrode is connected with negative high-voltage high-frequency electricity (voltage 10 KV-20 KV, frequency 20K-40K). Preferably, the water tank is provided with a water inlet valve and a water outlet valve, the water inlet valve is arranged at the upper part, and the water outlet valve is arranged at the lower part. In order to solve the technical problem of the invention, the other technical proposal is that the method for degrading industrial wastewater by the dual action of plasma adsorption of the equipment comprises the following steps: (1) Adding industrial wastewater into a vertical water tank (1), controlling the water line to be at half height, wherein one of an upper fixed pulley and a lower fixed pulley of a pulley block (3) is higher than the water surface, the other is immersed in water, and the flexible fiber cloth on the pulley block (3) is half on water and the other is half under water; (2) The pulley block (3) is driven to rotate by a motor, the linear speed of the fixed pulley is 0.5cm-5cm seconds, the flexible fiber cloth on one side rises out of the water, the flexible fiber cloth on the other side sinks into the water, and at the moment, the flat electrode group (4) is connected with a plasma power supply; (3) A small amount of water is contained in the fiber cloth belt above the water surface, and when p