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Purification and filtering plate for waste air from chemical Lab., and its mfg. method

A chemical laboratory and exhaust gas purification technology, which is applied in the field of exhaust gas purification treatment, chemical laboratory exhaust gas purification adsorption plate and its preparation, can solve the problems of secondary pollution, low degradation efficiency, easy loss of photocatalyst, etc., and achieve operating costs Low, strong adsorption capacity, easy to use effect

Inactive Publication Date: 2003-05-21
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 from chemical Lab., and its mfg. method
  • Purification and filtering plate for waste air from chemical Lab., and its mfg. method
  • Purification and filtering plate for waste air from chemical Lab., and its mfg. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1, the specific method is to mix 10-35nm TiO 2 , or Si-modified TiO 2 The semiconductor photocatalyst was dispersed in water with a solid content of 10%, and 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 press the slurry 1 to 150ml / m 2 Metered and evenly sprayed on the surface of the activated carbon fiber felt with a thickness of 3mm, and at a rate of 60ml / m 2 Measured, then sprayed 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 supported TiO 2 Activated carbon fiber felt made of 300×400(mm) 2 The adsorption plate of the 3 In the simulated ventilation pipe, a UV lamp with a power of 15W and a wavelength of 253.7nm and an axial flow fan were installed, and it was placed in a 187-lite...

Embodiment 2

[0030] In Example 2, a purification adsorption plate was prepared according to the method of Example 1. The difference is: TiO 2 The particle size of the photocatalyst is 10 to 50 nm. Detected according to the method of implementation 1, the initial concentration of toluene was 1000ppm, and the CO2 in 3 hours 2 The generation amount was 1000 ppm.

Embodiment 3

[0031] In Example 3, the purification adsorption plate was prepared 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-mentioned slurry 2 is sprayed, and the pressure is 210ml / m2. 2 Metered without spraying Slurry 1. Detected by the method of Example 1, the initial concentration of toluene was 1000 ppm, and the concentration of toluene was 150 ppm after 5 minutes; the purification rate was 85% after 5 minutes; after 3 hours, CO 2 The generation 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 fabricon 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 anddrying, 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 exhaust gas purification and treatment technology. Background technique [0002] Some of the existing exhaust gas purification treatment adopts activated carbon or activated carbon fiber adsorption method, which has the disadvantage of secondary pollution during desorption and regeneration; there are also adsorption-photocatalytic degradation methods that use activated carbon and photocatalyst mixtures, but their degradation efficiency is not high. There are also activated carbon powders on the carrier, and then the adsorption of photocatalysts - photocatalytic degradation method (CN12887745A), but the adsorption effect of activated carbon powder itself is not good, and the photocatalysts on the surface are easily affected by airflow. dissipated; in addition, activated carbon fiber mesh use...

Claims

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Application Information

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