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Exhaust emission and pollutant near-zero emission system and method used in carbon industry

A pollutant and exhaust gas volume technology, applied in the direction of combustion method, emission prevention, indirect carbon dioxide emission reduction, etc., can solve the problem of high cost of exhaust gas treatment in the carbon industry, reduce environmental protection operation costs, reduce boiler coal consumption, and realize comprehensive recycling and utilization Effect

Active Publication Date: 2017-12-01
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

[0005] In view of the above-mentioned defects and problems of the prior art, the object of the present invention is to provide a carbon industry waste gas volume and pollutant discharge system and method, which solves the high cost of waste gas treatment in the carbon industry, and at the same time reduces the amount of waste gas. and the problem of zero emission of pollutants

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  • Exhaust emission and pollutant near-zero emission system and method used in carbon industry

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Embodiment 1

[0040] 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. By adopting the system of the present invention, all the waste gas from the above processes can be used in a certain 35t / h industrial boiler as combustion air. Compared with the original exhaust gas purification system, in general, the present invention can reduce the amount of exhaust gas by about 46100Nm 3 / h, SO 2 Emission reduction about 15t / year, NO x It can reduce emissions by about 2t / year, asphalt smoke by about 1.5t / year, smoke / dust by about 7.5t / year, and save 7t of standard coal / year.

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Abstract

The invention discloses an exhaust emission and pollutant near-zero emission system and method used in a carbon industry. The system comprises a carbon exhaust purification treatment system, a boiler and a boiler exhaust purification system and further comprises a flue connecting system. A combustion air compensation unit is arranged on the flue connecting system. According to the method, after exhaust of a mixed kneading, forging and roasting purification unit and exhaust of an ingredient exhaust purification unit are mixed, the mixed exhaust as combustion-supporting gas is introduced into the boiler; when the set temperature and blast capacity requirements are met, the mixed exhaust is fully burnt in a hearth, exhaust combustion supporting is achieved in the carbon industry, and the exhaust emission and the pollutant near-zero emission is achieved; and meanwhile, the calorific value of asphalt fume and CO in the exhaust is reused, and the energy saving and emission reduction effects are achieved. The exhaust emission and pollutant near-zero emission system and method provide a new thought and method for the pollutant control and pollutant emission reduction in the carbon industry.

Description

technical field [0001] The invention relates to the technical field of atmospheric pollutant control, in particular to a carbon industry waste gas volume and pollutant discharge system and method. Background technique [0002] The main production raw materials of the carbon industry are coal tar pitch and petroleum coke, which is a type of heavy pollution industry. Compared with other industries, the exhaust gas emitted by the carbon industry not only contains conventional pollutants, such as SO 2 , NO x , particulate matter, etc., and contains unconventional pollutants, such as asphalt smoke, etc., which have complex components and contain polycyclic aromatic hydrocarbons and benzopyrene carcinogens. [0003] The production process of the carbon industry mainly includes crushing, screening, grinding, batching, calcination, kneading and roasting, etc. Among them, asphalt melting, kneading molding, and roasting processes will produce asphalt fumes. At present, the treatmen...

Claims

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Application Information

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IPC IPC(8): F23B80/02F23L15/00F23J15/02
CPCF23B80/02F23J15/022F23J2215/20F23L15/00F23L2900/15043Y02E20/34
Inventor 张艳平黄家玉王红梅刘宇田刚谭玉玲曹晴王洪昌龙红艳张凡
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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