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Method for removing nitric oxide from gas

A nitrogen oxide and gas technology, which is applied in the field of air pollution control and related environmental protection, can solve the problems of expensive chemicals, low absorption efficiency, high operation and use costs, and achieve safe use, large processing capacity, and low investment costs and operating costs. Effect

Inactive Publication Date: 2016-03-23
黄立维
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Method for removing nitric oxide from gas

Examples

Experimental program
Comparison scheme
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 gas such 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 (nitric oxide is about 90%) in the gas is 500ppm, oxygen is 8% (volume), water content is 10% (volume), and the rest is nitrogen. Polyaluminum chloride is a commercially available industrial-grade powder particle with an average particle size of about 0.1mm. Polyaluminum chloride is heated to 80°C and 120°C reaction temperature respectively and then introduced into the gas-solid reaction tower. The gas temperature in the tower is respectively At 20°C, 50°C and 90°C, the gas-solid contact time in the reaction tower is about 4-6s. The mass ratio of nitrogen oxides to polyaluminum chloride is about 1:10. After the gas-so...

Embodiment 2

[0020] Example 2: Polyaluminum chloride is introduced into the gas-solid reaction tower at normal temperature, the gas temperatures in the tower are respectively 90°C, 120°C and 180°C, and the mass ratio of nitrogen oxides to polyaluminum 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: Use polyaluminum chloride particles as the reactant, and mix 20% (volume) of quartz sand with a particle size of about 1mm-3mm in the material. Other conditions are with embodiment 2. The experimental results are shown in Table 3.

[0024] table 3

[0025]

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Abstract

The invention discloses a method for removing nitric oxide from gas, and belongs to the technical field of air pollution control and environment protection. According to the treatment process of the method, the treated gas is led into a gas-solid reaction tower, meanwhile aluminum polychlorid solid particles are led into the gas-solid reaction tower, nitric oxide in the gas and aluminum polychlorid are subjected to a gas-solid chemical reaction at a certain temperature in the gas-solid reaction tower, then nitric oxide in the gas is absorbed and removed, and therefore the gas purification purpose is achieved. The invention further discloses a special device. The method and the special device have the advantages that investment cost and operating cost are low, use is safe, by-products can be recycled, operation is easy, treatment efficiency is high, and treatment capacity is large.

Description

technical field [0001] The invention relates to a method for removing nitrogen oxides from gas, 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. NO X It 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. 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 acid rain pollution in some places has begun to change from sulfuric acid to nitrate ions (Ministry of Environmental P...

Claims

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Application Information

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IPC IPC(8): B01D53/83B01D53/82B01D53/56
CPCB01D53/565B01D53/82B01D53/83B01D2257/402B01D2257/404B01D2259/128Y02C20/10
Inventor 黄立维
Owner 黄立维
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