Method for treating obnoxious gas by active bamboo charcoal-H2O2 composite catalytic oxidation

A technology of -H2O2 and malodorous gas, which is applied in the direction of chemical instruments and methods, separation methods, chemical/physical processes, etc., can solve the problems of small amount of odor treatment, increase of device materials and volume, consumption, etc., to improve residence time, The effect of improving the treatment effect and improving the reaction efficiency

Inactive Publication Date: 2011-05-18
SHANGHAI SHUITIAN ENVIRONMENTAL PROTECTION
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Problems solved by technology

It has the function of ozone deodorization. Although ozone can oxidize odorous gas molecules, under normal conditions, the reaction speed of odor molecules oxidized by ozone is not very fast, which will lead to either a small amount of odor treatment or unsatisfactory deodorization effect. , or need to consume a large amount of ozone and increase the material and volume of the device
[0012] Chinese patent application number: 200510041341.4, which provides a deodorization device using water spray and biological filtration, its main disadvantage is that the biochemical reaction process of biological filtration requires a relatively long residence time, thus requiring a large floor area At the same time, the critical operating parameters such as the uniformity, air permeability, humidity, temperature and pH value of the filter material are also difficult to control, and leachate will also be generated, which also has limitations in the treatment of some complex and high-concentration odorous gases.

Method used

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  • Method for treating obnoxious gas by active bamboo charcoal-H2O2 composite catalytic oxidation
  • Method for treating obnoxious gas by active bamboo charcoal-H2O2 composite catalytic oxidation
  • Method for treating obnoxious gas by active bamboo charcoal-H2O2 composite catalytic oxidation

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Embodiment 1

[0053] The preparation of embodiment 1 multiphase bamboo carbon catalyst

[0054] Raw material: hollow cylindrical bamboo, diameter Φ30mm-Φ50mm, length 30mm-50mm

[0055] Method: The composite bamboo carbon catalyst was prepared according to the following methods

[0056] 1. Bamboo charcoal is soaked in 0.8% ferrous sulfate aqueous solution with a pH of 2 for 2 hours, pulled out and dried in the air, and then dried at a temperature of 100 to 300°C.

[0057] 2. Bamboo charcoal is prepared by immersing the bamboo charcoal in 0.1% by weight ferric sulfate aqueous solution with a pH of 3 for 2 hours, taking it out and drying it in the air, and then drying it at a temperature of 100-300°C.

[0058] 3. The bamboo charcoal is prepared by immersing the bamboo charcoal in a 1% by weight aqueous solution of ferrous sulfate with a pH of 5 for 2 hours, pulling it out and drying it in the air, and then drying it at a temperature of 100-300°C.

[0059] 4. The bamboo charcoal is impregnate...

Embodiment 2

[0062] Embodiment 2 active bamboo carbon-H 2 o 2 Device for treatment of malodorous gas by multi-phase catalytic oxidation

[0063] Such as figure 1 Activated Bamboo Carbon-H 2 o 2 The device for treating malodorous gas by multi-phase catalytic oxidation includes exhaust gas inlet 31, preprocessor 32, two parallel wet bamboo carbon multi-phase catalytic oxidation beds 35, alkali spray tower 18, blower fan 8 and exhaust gas Barrel 24.

[0064]The preprocessor 32 is an aerosol dust collector. The alkali spray tower 18 is a vertical structure, connected behind the wet-type bamboo-carbon multi-phase catalytic oxidation bed, the weakly acidic gas produced after the treatment of the wet-type bamboo-carbon multi-phase catalytic oxidation bed is carried out to neutralize the chemical reaction, so that the purified gas discharged is in the form of Neutral, meeting the requirements of national emission standards. The neutralization solution is a NaOH aqueous solution with a conce...

Embodiment 3

[0079] Embodiment 3 malodorous gas treatment

[0080] In the production of granular fragrance products by a fragrance company, the malodorous gas produced adopts the activated bamboo carbon-H of embodiment 2 2 o 2 Multi-phase catalytic oxidation device treatment of malodorous gas. Exhaust gas enters through exhaust gas inlet 31, and through preprocessor 32, enters wet-type bamboo-carbon composite-phase catalytic oxidation bed 35 by exhaust-gas inlet 23, and in wet-type bamboo-carbon composite-phase catalytic oxidation bed, first passes through composite-phase bamboo-carbon catalyst 2 to absorb To remove odorous substance molecules, the aqueous solution of hydrogen peroxide is sprayed onto the multiphase bamboo carbon catalyst 2 through the nozzle 5 to decompose the adsorbed odorous substance molecules and achieve the recycling of the multiphase bamboo carbon catalyst, and the gas goes up to the mist eliminator 1 after water and gas separation , discharged from the purified g...

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Abstract

The invention relates to the technology of obnoxious gas treatment, and discloses a method for treating obnoxious gas by active bamboo charcoal-H2O2 composite catalytic oxidation. The method comprises the following steps of: adsorbing the obnoxious gas through a composite bamboo charcoal catalyst to remove obnoxious substance molecules, spraying aqueous solution of hydrogen peroxide to the composite bamboo charcoal catalyst to decompose the adsorbed obnoxious substance molecules and achieve recycle of the composite bamboo charcoal catalyst, performing water-gas separation by using a demister,introducing the gas into spraying alkali solution in an alkali spraying tower to neutralize acid substances in the gas, and discharging the neutralized gas. The obnoxious gas treatment method has high treatment efficiency, and is particularly suitable for treating high quantity of obnoxious gas.

Description

[0001] This case is a divisional application of the following patent application: [0002] Application number: 200910044979.1; [0003] Application date: January 7, 2009; [0004] Invention Name: Activated Bamboo Carbon-H 2 o 2 A method and device for treating malodorous gas by multiphase catalytic oxidation. technical field [0005] The invention relates to the technical field of malodorous gas treatment, in particular to a method for treating malodorous gas. Background technique [0006] Odor pollutants refer to all gaseous substances that stimulate the olfactory organs to cause people's unpleasantness and damage the living environment. Usually people's understanding of malodorous gas is odor, such as the smell produced and volatilized by sewage, sludge, garbage, etc. In fact, in addition to the above-mentioned substances, foul-smelling gases can be produced in human production and living processes. The main ingredients except hydrogen sulfide (H 2 S), ammonia (NH ...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/86B01D53/04B01J27/053B01J20/20
Inventor 侯惠奇蒋雪华阎栋志
Owner SHANGHAI SHUITIAN ENVIRONMENTAL PROTECTION
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