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Purification and filtering plate for waste air of chemical lab. and its mfg. method

A chemical laboratory and exhaust gas purification technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve problems such as low degradation efficiency, secondary pollution, easy loss of photocatalysts, etc., to achieve convenient use and efficient operation The effect of low cost and strong adsorption capacity

Inactive Publication Date: 2005-02-23
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Some of the existing waste gas purification treatment adopts activated carbon or activated carbon fiber adsorption method, which has the disadvantage of secondary pollution during desorption and regeneration; there is also the adsorption of activated carbon and photocatalyst mixture - photocatalytic degradation method, but its degradation efficiency is not high. High; also have activated carbon powder on the carrier, and then load the adsorption of photocatalyst—photocatalytic degradation method (CN12887745A), but the adsorption effect of activated carbon powder itself is not good, and the photocatalyst on the surface is easy to Lost; In addition, activated carbon fiber webs used for organic wastewater treatment as TiO 2 Adsorption of carrier—photocatalytic treatment method (CN1301668A), its TiO 2 It is combined with activated carbon fiber in a loaded manner, and it is not suitable for the purification requirements of exhaust gas with high flow rate

Method used

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  • Purification and filtering plate for waste air of chemical lab. and its mfg. method
  • Purification and filtering plate for waste air of chemical lab. and its mfg. method
  • Purification and filtering plate for waste air of chemical lab. and its mfg. method

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Effect test

Embodiment 1

[0021] Embodiment 1, the concrete method is to use 10~35nm TiO 2 , or Si-modified TiO 2 The semiconductor photocatalyst is dispersed in water with a solid content of 10%, and is fully dispersed under the action of ultrasonic waves to obtain a stable slurry 1. Dissolve 1% carboxymethyl cellulose in slurry 1 and make it uniform under the action of ultrasonic waves to form slurry 2. Use a spray gun to spray slurry 1 at 150ml / m 2 Measure and spray evenly on the surface of activated carbon fiber felt with a thickness of 3mm, and use 60ml / m 2 Measure, then spray the slurry 2, put it into a blast drying oven at 180°C for 2 hours, and then cut it according to the actual size for use. Using the above-mentioned loaded TiO 2 Made of activated carbon fiber felt 300×400(mm) 2 The adsorption plate, put these two adsorption plates on the bottom of 300×450×100(mm) 3 In the simulated air duct, a power of 15W and an ultraviolet lamp with a wavelength of 253.7nm and an axial flow fan are i...

Embodiment 2

[0024] Embodiment 2, prepare the purification adsorption plate according to the method of embodiment 1. The difference is: TiO 2 The particle size of the photocatalyst is 10-50 nm. Detect according to the method of implementation 1, the initial concentration of toluene is 1000ppm, 3 hours CO 2 The production amount was 1000 ppm.

Embodiment 3

[0025] Example 3, prepare a purification adsorption plate according to the method of Example 1. The difference is: in the process of spraying the photocatalyst slurry to the activated carbon fiber, only the above slurry 2 is sprayed, and the 210ml / m 2 Meter without spraying slurry 1. Detect by the method for embodiment 1, the initial concentration of toluene is 1000ppm, and after 5 minutes, toluene concentration is 150ppm; 5 minutes purification rate is 85%; After 3 hours CO 2 The production amount was 700 ppm.

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Abstract

The present invention discloses a chemical laboratory waste gas cleaning adsorption plate and its preparation method. Said adsorption plate is composed of loading plate and active carbon fibre fabric on which TiO2 or modified TiO2 photocatalyst is carried, the active carbon fibre fabric is fixed on the loading plate or said adsorption plate is made of simple active carbon fibre and on whith TiO2 or modified Tio2 photocatlayst honeycomb plate structure is carried. Its preparation method includes the processes of preparing slurry by using TiO2 or modified TiO2 photocatalyst, spraying slurry and drying, etc. Said adsorption plate does not produce secondary pollution and its cost is low.

Description

technical field [0001] The invention relates to a chemical laboratory waste gas purification adsorption plate and a preparation method thereof. It belongs to waste gas purification treatment technology. Background technique [0002] Some of the existing waste gas purification treatment adopts activated carbon or activated carbon fiber adsorption method, which has the disadvantage of secondary pollution during desorption and regeneration; there is also the adsorption of activated carbon and photocatalyst mixture - photocatalytic degradation method, but its degradation efficiency is not high. High; also have activated carbon powder on the carrier, and then load the adsorption of photocatalyst—photocatalytic degradation method (CN12887745A), but the adsorption effect of activated carbon powder itself is not good, and the photocatalyst on the surface is easy to Lost; In addition, activated carbon fiber webs used for organic wastewater treatment a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04B01D53/88B01J20/20
Inventor 时雨荃李保标陈有荣艾小康
Owner TIANJIN UNIV