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Method for purifying air

An air and carbon monoxide technology, which is applied in the fields of combustible gas purification, chemical instruments and methods, combustible gas purification/transformation, etc., and can solve the problems of energy consumption, low energy utilization rate, and low ignition point of activated carbon.

Active Publication Date: 2009-09-16
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon adsorbents are often regenerated by blowing off with hot air, but due to the low ignition point of activated carbon, the process of blowing off with hot air often causes ignition.
At the same time, in the process of hot air blowing off, an external heat source is required to heat the air to a higher temperature, the temperature of the outlet air is relatively high, and the utilization rate of energy is often relatively low
For the catalytic purification method, it is also necessary to use an external heat source to heat the catalytic bed or the air containing pollutants to a higher temperature, which also has the problem of relatively energy consumption.

Method used

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  • Method for purifying air

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Embodiment 1

[0016] Purification process such as figure 1 shown. The reactor is filled with porous graphitized carbon adsorbent (specific surface area 370 m2 / g, pore volume 0.5 ml / g, particle size 40-60 mesh), and the filling volume is 500 ml. The pollutant in the air is toluene, the concentration is about 200 mg / m3. The fan air power system makes the polluted air flow into the reactor at a rate of 5 liters / minute, and within 10 days, the concentration of toluene in the outlet gas does not exceed 0.2 mg / m3. After 10 days, connect the outlet end of the reactor to the outdoors, or connect it to the incinerator, and start the fan aerodynamic system, adjust the power supply to a certain voltage, and heat the porous graphitized carbon adsorbent to 120°C in 15 minutes. its regeneration.

Embodiment 2

[0018] Purification process such as figure 1 shown. The reactor is filled with porous silicon carbide-supported palladium catalyst (specific surface area 140 square meters per gram, particle size 40-60 mesh), and the filling volume is 500 ml. The pollutant in the air is benzene, the concentration is about 260 mg / m3. Adjust the power supply to a certain voltage, make the porous silicon carbide energized and heat up to 210°C, turn on the fan air power system, and pump the polluted air into the reactor at a speed of 5 liters / minute, contact the catalyst and be catalyzed and destroyed, and the outlet gas The concentration of benzene should not exceed 0.1 mg / m3.

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Abstract

The invention relates to a method for removing carbon monoxide or volatile organic contaminants, which is realized by contacting polluted air with filler contained in a reactor. The filler of the reactor is porous graphitizing carbon or porous silicon carbide or porous graphitizing carbon or porous silicon carbide which is loaded with reactive metal components; the filler is used as adsorbent or oxidation catalyst and is heated up by accessing to electric current to realize regeneration of the adsorbent or activation of the catalyst. The method of the invention is applicable to removal of the carbon monoxide and the volatile organic contaminant discharged by households, cars or industrial polluting sources and has the advantages of safety and energy saving.

Description

technical field [0001] The invention belongs to the technical field of pollution control, in particular to the technical field of air pollution control. Background technique [0002] Volatile organic compounds and carbon monoxide are important pollutants that cause indoor air pollution, cabin air pollution and atmospheric pollution. Adsorption and catalysis are two commonly used technologies to deal with these two types of pollutants. For adsorption techniques, activated carbon is the most commonly used adsorbent. Activated carbon adsorbents are often regenerated by blowing off with hot air, but due to the low ignition point of activated carbon, the process of blowing off with hot air often causes fire. At the same time, in the process of hot air blowing off, an external heat source is required to heat the air to a higher temperature, the temperature of the outlet air is relatively high, and the utilization rate of energy is often relatively low. For the catalytic purifica...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01D53/86B01J20/20B01J20/02B01J20/34B01D53/62B01D53/72B01D53/70A61L9/014F24F3/16
CPCY02A50/20
Inventor 李进军郝郑平梁燕何炽胡琴田华豆宝娟麻春艳
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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