Method for removing nitric oxide from airflow

A technology of nitrogen oxides and gas flow, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of high operating cost, low absorption efficiency, low solubility, etc., achieve large processing capacity, simple operation, and high efficiency effect

Inactive Publication Date: 2016-05-04
黄立维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for nitrogen oxides containing more nitric oxide, because the solubility of nitric oxide in the solution is very small, the absorption efficiency is low, and the medicament is expensive, and the operating cost is high.

Method used

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  • Method for removing nitric oxide from airflow
  • Method for removing nitric oxide from airflow
  • Method for removing nitric oxide from airflow

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: a kind of circulating fluidized bed gas-solid reaction tower device of the method for removing nitrogen oxides from the gas stream is as figure 1 shown. The circulating fluidized bed gas-solid reaction tower has a tower diameter of Φ60 mm, a tower height of 2500 mm, and a tower body made of 316L stainless steel. The concentration of nitrogen oxides (about 90% nitric oxide) in the gas stream is 500 ppm, oxygen is 8% by volume, moisture content is 10% by volume, and the balance is nitrogen. Aluminum chloride is a commercially available industrial-grade powder particle with an average particle size of about 0.1mm. The reaction temperatures are 20°C, 50°C, 90°C, 120°C and 180°C, and the gas-solid contact time in the reaction tower is about 4 -6s. The molar ratio of nitrogen oxides to aluminum chloride is about 1:5. After the gas-solid separator (using a cyclone separator), the reacted solid particles are not returned to the tower. The experimental results ...

Embodiment 2

[0020] Example 2: The molar ratio of nitrogen oxides to aluminum chloride is about 1:15. Other conditions are with embodiment 1. The experimental results are shown in Table 2.

[0021] Table 2

[0022]

Embodiment 3

[0023] Embodiment 3: using aluminum chloride particles as the reactant, mixing 20% ​​(volume) of quartz sand with a particle size of about 1mm-3mm in the material, and the molar ratio of nitrogen oxides to aluminum chloride is about 1:15. The reaction temperatures were 50°C, 90°C and 120°C, respectively. Other conditions are with embodiment 1. The experimental results are shown in Table 3.

[0024] table 3

[0025]

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Abstract

The invention relates to a method for removing a nitric oxide from airflow, and belongs to the technical field of air pollution control and environment protection. The method comprises the treatment processes that treated gas is guided into a gas-solid reaction tower, meanwhile, aluminum chloride solid particles are guided into the gas-solid reaction tower, the nitric oxide in the airflow is subjected to a gas-solid adsorption chemical reaction with aluminum chloride in the gas-solid reaction tower to be absorbed and removed, and therefore the gas purification purpose is achieved. The invention further discloses a special device. The method has the advantages that the investment cost and operation cost are low, by-products can be recycled, operation is easy, the treatment efficiency is high, and the handling capacity is large.

Description

technical field [0001] The invention relates to a method for removing nitrogen oxides from airflow, and belongs to the technical field of air pollution control and related environmental protection. Background technique [0002] Nitrogen oxides (NOx) produced by human activities x ) mainly includes NO and NO 2 , of which more than 90% are produced by fuel combustion, followed by industrial processes such as nitric acid production, chemical and pharmaceutical nitration reactions, metal surface and semiconductor processing. NOx is toxic to humans, and a large amount of nitrogen oxide emissions is also one of the main causes of atmospheric photochemical smog and acid rain. Sulfur dioxide pollutants in the atmospheric environment are mainly produced during the combustion of fossil fuels. Statistical data in the Bulletin on the State of the Environment in China shows that the contribution of nitrogen oxides in acid rain in my country's cities is increasing, and the nature of ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/82B01D53/83B01D53/56B01D53/96
CPCB01D53/82B01D53/565B01D53/83B01D53/96B01D2251/60B01D2258/0283
Inventor 黄立维
Owner 黄立维
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