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Device and method for waste gas photocatalytic degradation using electrodeless excimer lamp

A catalytic degradation and excimer technology, which is applied in the field of devices for catalytic degradation of waste gas by non-polar excimer light, can solve the problems of small selection range of electrode materials and luminescent substances, long ignition time and stabilization time, and low utilization rate of light radiation. Avoid electrode aging, occupy a small area, and have a wide range of applications

Active Publication Date: 2013-07-03
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional light sources generally have electrodes. Due to the existence of electrodes in the lamp, a series of problems have been caused: short life, long ignition time and stable time, small selection range of electrode materials and luminescent substances, less shape change, and light radiation utilization. Low rate and complex external circuit
The structure of the device is relatively complex, it occupies a large area, and there are many equipments that need to be maintained in the later operation.

Method used

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  • Device and method for waste gas photocatalytic degradation using electrodeless excimer lamp
  • Device and method for waste gas photocatalytic degradation using electrodeless excimer lamp
  • Device and method for waste gas photocatalytic degradation using electrodeless excimer lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (Example 1, a device for catalytically degrading exhaust gas by non-polar excimer lights)

[0057] See figure 1 , The device of the present embodiment of the non-polar excimer light catalytic degradation of exhaust gas includes a gas collection hood 1, a connecting sleeve 2, a gas mixer 3, an inlet distributor 4, a reactor 5, an outlet distributor 6 and an induced draft fan. The air collecting hood 1 includes a lower air collecting hood 11 and an upper air collecting hood 12 . The lower gas collecting hood 11, the gas mixer 3, the reactor 5, the gas outlet distributor 6 and the upper gas collecting hood 12 are arranged sequentially from bottom to top.

[0058] The air inlet of the lower gas collecting hood 11 is connected with the exhaust gas generator gas outlet or the gas storage tank of the gas to be degraded, and the gas outlet of the lower gas collecting hood 11 is connected with the air inlet of the connecting sleeve 2 through a flange. The gas mixer 3 is arran...

Embodiment 2

[0093] (Example 2, the method of non-polar excimer light catalytic degradation exhaust gas)

[0094] The method for catalytically degrading waste gas by light-emitting excimer light in this embodiment adopts the device described in Embodiment 1, and the through-hole plug used in the air inlet distributor 4 is a blind hole plug 48 . The inner electrode 71 is made of metal sheet, and the outer electrode 72 is made of metal mesh.

[0095] The process of photocatalytic degradation of waste gas by non-polar excimer lights is as follows: the waste gas from the waste gas generator or the waste gas storage tank is initially mixed by the gas mixer 3, and then further mixed evenly by the air inlet distributor 4, and then enters the reactor under the action of the induced draft fan 5 for purification. The outlet of the reactor 5 is 1m away from the reactor, and a sampling port is set, and the concentration of the reacted gas is detected by an online gas analyzer, and the gas degraded to...

Embodiment 3

[0102] (Example 3, the method of non-polar excimer light catalytic degradation of waste gas)

[0103] The method for catalytically degrading waste gas by light-emitting excimer light in this embodiment adopts the device described in Embodiment 1, and the through-hole plug used in the air inlet distributor 4 is a porous plug 47 . The inner electrode 71 is made of metal mesh, and the outer electrode 72 is made of metal sheet.

[0104] See Figure 7 , in this example, the degradation flow dynamics simulates dimethylamine waste gas, and the initial concentration is 3745mg / m 3 , the method for degrading exhaust gas specifically includes the following steps:

[0105] ①Evacuate the gas-filled zone II, and then fill it with Kr:Cl 2 =350:1, total pressure 205torr.

[0106]② Turn on the high-voltage power supply 73, apply an external voltage of 6kV, and a power of 50W. The gas-filled mixed gas in zone II is excited to generate excimer ultraviolet light to radiate to the reaction zon...

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Abstract

The invention discloses a device and a method for waste gas photocatalytic degradation using an electrodeless excimer lamp. A used reactor comprises a three quartz medium layer, an inner electrode, an outer electrode and a high-voltage power supply, wherein the three-layer quartz medium layer comprises a first quartz tube, a second quartz tube and a third quartz tube, which are coaxial and are sequentially arranged from inside to outside; the inner cavity of the first quartz tube is a zone I reaction zone; a hermetic circular cavity is formed between the second quartz tube and the first quartz tube, and is used as a gas filling zone II; and a zone III reaction zone is formed between the third quartz tube and the second quartz tube. During waste gas photocatalytic degradation, gas in the gas filling zone II is excited to generate excimer UV-light, and then sends radiation towards the zone I reaction zone and the zone III reaction zone; and the waste gas to be degraded all passes through the zone I reaction zone, or all passes through the zone III reaction zone, or split-flows into the zone I reaction zone and the zone III reaction zone, and is then degraded under the action of the excimer UV-light radiation.

Description

technical field [0001] The invention relates to the field of exhaust gas degradation, in particular to a device and method for catalytically degrading exhaust gas by an electrodeless excimer light. Background technique [0002] Ultraviolet light source has been widely used in the fields of microelectronics, medicine, chemical industry, sanitation and environmental protection, and has become a basic and key technology. All of the above applications require the light source to have a narrow radiation spectrum and a certain radiation intensity. For traditional medium and high-pressure mercury lamps, the radiation spectrum has a wide range of wavelengths (from the ultraviolet region to the visible region), and the luminous efficiency of ultraviolet light at the required wavelength is low; low-pressure mercury lamps and inert gas lamps can radiate narrow-band ultraviolet spectra, but their light The intensity is relatively weak, which affects the corresponding photochemical reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/76
Inventor 叶招莲孙建华赵洁黄红缨侯洁
Owner JIANGSU UNIV OF TECH
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