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Synchronous gas-liquid purifying high voltage DC/pulse discharge method and device

A high-voltage direct current, pulse discharge technology, applied in chemical instruments and methods, electrical components, separation methods, etc., can solve the problem of reasonable matching between the design structure of the plasma generator and the power supply, and the simultaneous degradation and removal of few gas-liquid two-phase pollutants , high power supply costs and other issues, to achieve the effect of low energy consumption and operating costs, no secondary pollution, and high processing efficiency

Active Publication Date: 2008-12-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the methods currently used to degrade organic matter by low-temperature plasma are basically separate water treatment or separate gas treatment, and there are few technologies and devices that are applied to the simultaneous degradation and removal of gas-liquid two-phase pollutants; in addition, plasma with water phase The discharge method mostly adopts pulse power supply, the cost of power supply is high, and the energy consumption is relatively high. It is difficult to reasonably match the design structure of the plasma generator with the power supply.

Method used

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  • Synchronous gas-liquid purifying high voltage DC/pulse discharge method and device
  • Synchronous gas-liquid purifying high voltage DC/pulse discharge method and device

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Embodiment 1

[0030] Such as figure 1 As shown, a device for synchronously purifying gas and liquid with high-voltage direct current / pulse discharge: it includes a high-voltage direct current / pulse power supply 1, and there are gas outlet 5, air inlet 2, liquid inlet 3, and liquid outlet 6 sequentially from top to bottom A cylindrical insulating shell 8, a plasma generator 4 composed of a cylindrical metal mesh ground electrode 9 and a hollow nozzle corona electrode 10; the inner wall of the cylindrical insulating shell 8 is equipped with a cylindrical metal mesh ground electrode 9, a hollow nozzle corona electrode 10 is installed in the center of the cylindrical metal mesh ground electrode 9 and fixed on the upper cover of the plasma generator 4. The bottom end of the hollow nozzle corona electrode 10 is located on the same level as the cylindrical metal mesh ground electrode 9, which is the same level as the gas-liquid The interfaces are parallel, and the corona electrode 10 of the hollow...

Embodiment 2

[0033] Such as image 3 As shown, a high-voltage direct current / pulse discharge synchronous gas-liquid purification device: including a high-voltage direct current / pulse power supply 1, a cylindrical insulating shell with a gas outlet 5, a liquid inlet 3, and a liquid outlet 6 in sequence from top to bottom 8. A plasma generator 4 composed of a cylindrical metal mesh ground electrode 9 and a hollow nozzle corona electrode 10. The inner wall of the cylindrical insulating shell 8 is equipped with a cylindrical metal mesh grounding electrode 9, the hollow nozzle corona electrode 10 is installed in the center of the cylindrical metal mesh grounding electrode 9, and is fixed on the upper cover of the plasma generator 4, and the bottom of the corona electrode 10 is The terminal and the mesh ground electrode 9 are located on the same horizontal plane, which is parallel to the gas-liquid interface. The hollow nozzle corona electrode 10 is connected to the positive pole of the high-vol...

Embodiment 3

[0036] Such as Figure 4 As shown, a high-voltage direct current / pulse discharge synchronous gas-liquid purification device: including a high-voltage direct current power supply 1, a cylinder with an air outlet 5, an air inlet 2, a liquid inlet 3, and a liquid outlet 6 sequentially opened from top to bottom The plasma generator 4 is composed of a hollow needle-shaped corona electrode 15 and a circular metal mesh ground electrode 16. The circular metal mesh ground electrode 16 is placed inside the plasma generator 4, the upper end of the metal conductive rod 17 passes through the center of the upper cover of the cylindrical insulating shell 8, and the lower end is welded and fixed with the center of the circular metal mesh ground electrode 16, and the metal conductive rod is adjusted 17 up and down, so that the position of the circular metal mesh ground electrode 16 is higher than the air inlet 2, and connected to the power supply ground electrode 11, a set of hollow needle-sha...

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Abstract

The present invention discloses synchronous gas-liquid purifying high voltage DC / pulse discharge method and device. After waste gas and waste liquid is fed to the gas-liquid plasma generator and the hollow nozzle as the corona electrode and the metal net as the earthing electrode are connected separately to the positive pole and negative pole of the high voltage DC / pulse power source, the power source powers is turned on to make the plasma generator generate electric field of strength 1-10 kV / cm and produce corona discharge, so as to excite the free radical source matter molecule in the plasma generator and to generate active particle degrading pollutant and killing bacteria, viruses, micro algae and protozoa, with the purified liquid or gas being exhausted. The present invention has high treating efficiency, simple technological process, low power consumption, low treating cost and no secondary pollution.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method and device for synchronously purifying gas and liquid through high-voltage direct current / pulse discharge. Background technique [0002] Low temperature plasma treatment is a new advanced oxidation process. In recent years, it has been widely used in the fields of water treatment and air treatment. Low-temperature plasma treatment of organic waste gas is mainly used to treat volatile organic waste gas (VOCs), SOx, NOx, smoke and bacteria. It was in the late 1980s that the technology was tried to treat refractory organic wastewater. [0003] The chemical reactions in the gaseous low-temperature plasma are mainly completed by the excitation of high-energy electrons generated by the gas discharge. The interior of low-temperature plasma is rich in electrons, ions, free radicals and excited molecules. Among them, high-energy electrons collide with gas mol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/08H05H1/42B01D53/74C02F1/48C02F1/78
Inventor 吴祖成康颖
Owner ZHEJIANG UNIV
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