Emission reduction system and method for gradient and cyclic utilization of waste gas of carbon industry

A waste gas and carbon technology, applied in the direction of combustion methods, combustion types, incinerators, etc., can solve problems such as waste gas pollution

Active Publication Date: 2017-12-08
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

[0006] In view of the serious waste gas pollution in the carbon industry and the above-mentioned problems in the prior art, the purpose of the present invention is to provide an emission reduction system and method for the gradient and recycling of w

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  • Emission reduction system and method for gradient and cyclic utilization of waste gas of carbon industry

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Embodiment 1

[0069] Carbon anode product factory with an annual output of 60,000 tons of aluminum, the calcination process produces about 6000Nm of waste gas 3 / h, kneading waste gas about 1100Nm 3 / h, batching waste gas is about 17000Nm 3 / h, roaster exhaust gas is about 22000Nm 3 / h, the air volume required by the gasifier is about 2000Nm 3 / h. By adopting the system of the present invention, all the batching waste gas and kneading waste gas can be used in the roaster, 17% of the roaster waste gas is used for the roaster by self-circulation, and 27% of the roaster waste gas is used for the calciner. In addition, part of the waste gas discharged from the roaster About 2000Nm 3 / h can be circulated to the gas generator. Compared with the original exhaust gas purification system, in general, the present invention can reduce the amount of exhaust gas by at least about 30000Nm 3 / h, the amount of exhaust gas is reduced by about 65%, SO 2 Emission reduction about 12.0t / year, NO x It ca...

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Abstract

The invention discloses an emission reduction system and method for gradient and cyclic utilization of waste gas of the carbon industry. By a plurality of gas delivering control units which are additionally arranged in the emission reduction system for gradient and cyclic utilization of the waste gas of the carbon industry, parameters of a plurality of adjusting valves and booster fans are adjusted reasonably, the waste gas is automatically and accurately distributed into different carbon production processes and then is utilized in a gradient manner, self-circulating utilization of the waste gas in the same production process is implemented, therefore, the waste gas used as a combustion-supporting gas is reutilized, and the effect of reducing the amount of the waste gas and emission of pollutants is achieved. For solving the problem that waste gas pollution in the carbon industry is severe, the emission reduction system and method for gradient and cyclic utilization of the waste gas of the carbon industry are provided. The emission reduction system and method for gradient and cyclic utilization of the waste gas of the carbon industry play an important role in reduction of the total amount of discharged pollutants in the waste gas and economic, reasonable and efficient utilization of latent heat of the waste gas and ingredients of the combustion-supporting gas.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to an emission reduction system and method for the gradient and recycling of waste gas in the carbon industry. Background technique [0002] The carbon industry is a type of heavy pollution industry, the main air pollutants are sulfur dioxide, NO x , asphalt fume and dust. Compared with other industries, not only conventional pollutants (such as SO 2 , NO x ) has a relatively high emission limit, and the unconventional pollutant asphalt fume has a complex composition, containing polycyclic aromatic hydrocarbons and benzopyrene carcinogens, which directly endanger the health of the production personnel of the carbon factory. The surrounding environment of the industry also caused serious pollution. [0003] As we all know, the total emission of pollutants in the exhaust gas is the product of the amount of exhaust gas and the emission concentration of pol...

Claims

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Application Information

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IPC IPC(8): F23G7/06
CPCF23G7/06F23G2207/10F23G2209/14
Inventor 张凡黄家玉王相凤王洪昌邓双王红梅刘宇张辰崔宇韬束韫
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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