The gases emitted by the coking industry are mainly VOCs (volatile organic compounds) and other hydrocarbons, of which the main VOCs include alkanes, aromatics, alcohols, ketones, etc. The main ** includes the following aspects:
1. Coke oven gas: Coke oven gas is a gas containing a large number of VOCs produced in the coking process, mainly composed of organic substances such as alkanes and aromatics.
2. Volatile coal: Volatile coal is used in the coking production process, and burning volatile coal will release a large number of VOCs, such as benzene, toluene, etc.
3. Coke oven gas purification process: In the coke oven gas purification process, the solvents and adsorbents used will produce VOCs emissions, such as acetone, dimethylformamide, etc.
4. Top gas: The top of the coke oven is an important part of the coke oven system, which contains gas and VOCs, including methylene diphenyl, benzoic acid, etc.
5. Volatile organic compounds (VOCs) device emissions: Volatile organic compounds (VOCs) devices are used in the coking industry, and a certain amount of VOCs emissions will also be generated during the operation of the device.
6. Other hydrocarbons: Some other hydrocarbons will be emitted during the coking process, such as acetic acid, formaldehyde, etc.
For the VOCs in the coking industry, the following ways can be taken to govern:
1. Reduce VOCs emissions
By using raw materials that do not contain VOCs or have low VOCs content as much as possible; By improving the combustion equipment, the combustion efficiency is improved and the VOCs emissions in the combustion process are reduced.
2. Strengthen the governance of VOCs
The use of new treatment technologies, spray dust removal technology, cloud dust suppression technology, etc., to improve the level of waste gas collection and treatment, to ensure the stable and up to standard emission of volatile organic compounds VOCs.
3. Establish a VOCs monitoring system
Through the establishment of a VOCs monitoring system, we can keep abreast of the emission situation and formulate corresponding treatment measures.
5. Strengthen management and supervision
Strengthen the management and supervision of coking enterprises, establish an integrated system platform for measurement, control and governance, and ensure that enterprises carry out VOCs governance in accordance with relevant laws and regulations.