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Device for removing nitric oxide from airflow

A technology of nitrogen oxides and airflow, which is applied in the direction of air quality improvement, chemical instruments and methods, and separation of dispersed particles. It can solve the problems of low absorption efficiency, great impact on catalyst life, and high requirements for catalyst operating conditions, and achieve improved purification. Efficiency, the effect of improving energy efficiency

Inactive Publication Date: 2012-12-26
黄立维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires ammonia as a reducing agent, and the catalyst has high requirements on operating conditions. The sulfide and dust contained in the gas flow have a great impact on the life of the catalyst, and the operating cost is high, so it is not suitable for the application of low-temperature emission sources.
The wet method uses various liquids to absorb NOx, and is the main method for treating low-temperature emission sources. Since the Henry coefficient of nitric oxide in the solution is very small, the absorption efficiency is low, and it is not suitable for the nitrogen monoxide containing more Fuel combustion exhaust gas treatment

Method used

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  • Device for removing nitric oxide from airflow
  • Device for removing nitric oxide from airflow
  • Device for removing nitric oxide from airflow

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Effect test

Embodiment 1

[0018] Reference figure 1 : A purification device for harmful exhaust gas, including gas inlet 1, gas circulation space 2, conveyor belt drive motor 3, upper conveyor belt wheel 4, electrode plate (grounding) 5, corona high voltage wiring 6, corona wire 7, surface for loading Conveyor belt 8 with absorbent, gas outlet 9, lower conveyor belt wheel 10, absorbent slurry tank 11, absorbent slurry inlet 12, absorbent slurry outlet 13 are provided in the lower part of the device, and the upper gas circulation space and absorbent slurry layer have partitions 14 separate.

[0019] The treatment process is to introduce the nitrogen oxide-containing gas to be treated into the reactor through the gas inlet 1. The gas flow first passes through the corona discharge zone. In the reaction zone, under the action of the corona discharge, the monoxide in the gas flow is oxidized to two Nitrogen oxide, then in the gas-solid absorption reaction zone, the nitrogen dioxide reacts with the absorbent an...

Embodiment 2

[0029] Reference figure 2 : A purification device for harmful exhaust gas, including gas inlet 1, lower baffle 2, cylindrical electrode plate 3, gas circulation space 4, conveyor belt drive motor 5, upper conveyor belt wheel 6, corona high voltage wiring 7, corona wire 8. Gas outlet 9, upper baffle 10, conveyor belt 11 loaded with absorbent on the surface, lower conveyor belt wheel 12, absorbent slurry pool 13, absorbent slurry inlet 14, and absorbent slurry outlet 15 are provided in the lower part of the device.

[0030] The treatment process is to introduce the nitrogen oxide-containing gas to be treated into the reactor through the gas inlet 1, and the gas flow flows from bottom to top in the cylinder. In the flow channel, under the action of corona discharge, the gas in the gas flow is oxidized The nitrogen dioxide is oxidized to nitrogen dioxide. Then, the nitrogen dioxide reacts with the absorbent attached to the conveyor belt and is absorbed by the absorbent. The purified ...

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Abstract

The invention relates to a device which consists of corona discharge and chemical absorption and is used for removing harmful gas such as nitric oxide from airflow. The method comprises the following steps that: gas to be processed is guided into a reactor consisting of a corona discharging reaction area and a gas-solid absorption reaction area, so under the effect of the corona discharge non-balance plasma body, monoxide in the airflow is oxidized to nitrogen dioxide and then to be absorbed by alkaline solid absorbent which is attached on a transmission belt inside the reactor so as to realize the purification of the gas, the absorbent after being saturated is conveyed along the transmission belt to an absorbent pulp tank which is arranged on the lower part of the device, and the absorption layer on the transmission belt is washed and is reloaded with fresh absorbent to be sent back to the reaction area.

Description

Technical field [0001] The present invention is in the technical field of purification methods for removing nitrogen oxides contained in gas streams. Background technique [0002] The large amount of sulfur dioxide and nitrogen oxide emissions produced by human activities is the main cause of atmospheric acid rain. Among them, sulfur dioxide (SO 2 ) And nitrogen oxides (NO x ) Accounted for more than 90% of the row, followed by processes such as metallurgy, sulfuric acid and nitric acid production, oil refining and chemical pharmaceuticals. Statistics from the Bulletin of the State of the Environment in China show that the degree of acid rain pollution in cities in my country has increased in recent years. Environmental statistics show that the contribution of nitrogen oxides in acid rain in my country's cities is increasing. The nature of acid rain pollution in some places has begun to change from a single sulfuric acid type to a compound type with increasing nitrate ions (Stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/82B01D53/56
CPCY02A50/20
Inventor 黄立维
Owner 黄立维