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Spiral photo-reactor used for waste gas treatment and waste gas treatment process

A photoreactor and spiral technology, which is applied in the field of spiral photoreactors, can solve problems such as waste gas treatment equipment that has not yet been applied, and achieve the effect of high utilization rate of process light energy.

Inactive Publication Date: 2012-06-27
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the spiral ultraviolet light reactor has not yet been applied to waste gas treatment equipment

Method used

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  • Spiral photo-reactor used for waste gas treatment and waste gas treatment process
  • Spiral photo-reactor used for waste gas treatment and waste gas treatment process
  • Spiral photo-reactor used for waste gas treatment and waste gas treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The embodiment and working principle of the present invention are as follows: containing 0.3g / m of α-pinene 3 Ultraviolet photolysis treatment process of waste gas, gas flow rate 0.006~0.12m 3 / h, the residence time is 4.5-7200s, the humidity is 35-45%, the lamp source is 365nm and 254nm UV lamp (36w) or 185nm high ozone vacuum UV lamp (36w), the circulating water temperature is 25℃. The exhaust gas treatment results are shown in Table 1.

[0026] Table 1: α-Pinene waste gas treatment results

[0027] Main wavelength of light source

[0028] The results in Table 1 show that when using UV lamps with dominant wavelengths of 254nm and 365nm, the removal rate reaches 46% and 16.94% when the residence time is 7200s (that is, 120min), which can be used for static UV photolysis process; the wavelength is 185nm When the high ozone ultraviolet lamp is used, the residence time is only 68s and the removal rate reaches 100%, which can be used for dynamic ultraviolet photolysis proces...

Embodiment 2

[0030] The embodiment and working principle of the present invention are as follows: containing α-pinene 0.3~6.0g / m 3 Ultraviolet photolysis treatment process of waste gas, gas flow rate 0.006~0.12m 3 / h, residence time 4.5~90s, humidity 35~45%, high ozone vacuum ultraviolet lamp (36w) with main wavelength 185nm, circulating water temperature 25℃. The exhaust gas treatment results are shown in Table 2.

[0031] Table 2: α-Pinene waste gas treatment results

[0032] Intake air concentration

[0033] 0.3~6.0

[0034] The results in Table 2 show that when the residence time is constant, the removal effect decreases with the increase of the intake air concentration; when the intake air concentration is constant, the removal effect increases with the increase of the residence time. For higher concentration of α-pinene exhaust gas (exhaust gas concentration is higher than 1.5g / m 3 ), the removal rate can be improved by increasing the residence time. In this embodiment, when the in...

Embodiment 3

[0036] The embodiment and working principle of the present invention are: 1.0g / m of chlorobenzene 3 Ultraviolet photolysis treatment process for gas pollutants, gas flow rate 0.034m 3 / h, residence time 16s, humidity 2%-3%, 35%-45% and 75%-85% respectively, the lamp source is a high ozone vacuum ultraviolet lamp (36w) with a main wavelength of 185nm, and the circulating water temperature is 25℃. The exhaust gas treatment results are shown in Table 3.

[0037] Table 3: Treatment results of chlorobenzene waste gas

[0038] Relatively wet

[0039] (0.54)

[0040] The results in Table 3 show that humidity has a greater impact on the removal effect of chlorobenzene waste gas. When the relative humidity of the exhaust gas is low, UV photolysis has little effect on the removal of high-concentration chlorobenzene exhaust gas. When the relative humidity of the exhaust gas increases, a large number of strong oxidizing groups such as hydroxyl radicals will be generated in the reactor...

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Abstract

The invention provides a spiral photo-reactor used for waste gas treatment, which comprises a box body as well as a photo-reaction tube and an ultraviolet lamp that are arranged in the box body. The spiral photo-reactor is characterized in that the box body is of the light closing and sealing box body; the photo-reaction tube is of the spiral quartz glass tube that is arranged in the box body andis arranged along the box body in an axial spiral shape; one end of the spiral quartz glass tube is connected with a gas inlet that is communicated with waste gas, and the other end thereof is connected with a gas outlet that is communicated with a tail gas absorption device; the gas inlet and the gas outlet are arranged on the box body; the ultraviolet lamp is arranged at the axle center of the spiral quartz glass tube; and a water bath temperature-control jacket is connected with the box body into one. For the spiral photo-reactor and the process thereof, the efficiency of light energy utilization is high, and the organic waste gas such as olefin, chlorobenzene, chlorine hydrocarbon and the like that are difficult to be degraded biologically can be effectively treated. After the structural parameter of the reactor is calculated and enlarged, the spiral photo-reactor can be effectively applied for the actual industrial waste gas treatment.

Description

(1) Technical field [0001] The invention relates to a spiral photoreactor for waste gas treatment, and a process for using the reactor for waste gas treatment. (2) Background technology [0002] Commonly used methods to remove volatile organic compounds (Volatile Organic Compounds, VOCs) mainly include adsorption, absorption, combustion, condensation, and membrane separation. Waste gas biological treatment technology is becoming a rapidly popularized technology in the field of waste gas pollution control because of its incomparable low treatment cost and low secondary pollution, which are incomparable with traditional methods, especially in the lower concentration and larger gas volume, which are easily biodegradable. Organic waste gas and malodorous gas are being treated. However, for those hydrophobic gaseous pollutants (hydrocarbons, chlorinated hydrocarbons, etc.) that are difficult to biodegrade, due to their inherent physical properties, it is difficult to obtain an ideal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/74B01D53/72B01J19/12
Inventor 陈建孟成卓韦席劲瑛蒋轶锋魏莹莹
Owner ZHEJIANG UNIV OF TECH