Rubber exhaust gas solutions

Most of the waste gas pollutants in rubber exhaust are from the polymerization of raw materials in rubber production lines and processes such as heat treatment, which may contain a large amount of styrene, benzene, xylene, butanone, aldehyde, sulfide, nitrogen oxides and other organic waste gases and fumes, and along with a certain temperature diffusion to the entire workshop interior and the surrounding areas of the plant boundary, is a more serious pollution of exhaust gases.

Rubber exhaust gas and rubber vulcanization fumes are more harmful, and the exhaust gas composition contains malodorous substances and drifts far away with the wind and stays in the air for a long time. It causes various adverse effects. Therefore, it needs to be effectively collected and purified to ensure the good operation of the enterprise production and improve the workshop and plant environment and meet the national environmental protection requirements.

Rubber picture:

Rubber waste gas, the main components of which are tar and malodorous gases, non-methane total hydrocarbons. Among them, the odor components of rubber waste gas are complex and variable, and can be roughly divided into five categories:

(1) compounds containing sulfur: such as H2S, SO2, mercaptans;

(2) dust type: such as carbon black;

(3) compounds containing chlorine: such as amides, indoles

(4) hydrocarbons: such as alkanes, olefins, hydrocarbons, aromatic hydrocarbons;

(5) organic substances containing oxygen, such as alcohols, phenols, aldehydes, ketones, organic acids, etc.

Exhaust emission standards, with reference to the "Volatile Organic Compounds Control Emission Standards" (GB37822-2019), "Shandong Province Volatile Organic Compounds Emission Standards" (DB37-2801), the following table of exhaust emission standards:

(1) information provided by the owner in relation to the project

(2) "Law of the People's Republic of China on Environmental Protection" (2015-01-01)

(3) "Air Pollution Prevention and Control Law of the People's Republic of China" (2016-01-01)

(4) Ambient Air Quality Standards (GB3095-2012)

(5) "Law of the People's Republic of China on the Promotion of Cleaner Production", Decree No. 72 of the President of the People's Republic of China

(6) National Environmental Protection "Thirteenth Five-Year" Plan

(7) "Comprehensive Emission Standards for Air Pollutants" (GB16297-1996)

(8) "Emission Standards for Odor Pollutants" (GB14554-1993)

(9) "Environmental Protection Design Code for Construction Projects" (GB50483-2009)

(10) "Design Code for Heating, Ventilation and Air Conditioning" (GB50019-2003)

(11) "Building Design Fire Code" (GB50016-2014)

(12) "Code for the design of power supply and distribution systems" (GB50052-2009)

(13) "Emission Standards for Volatile Organic Compounds Control in Industrial Enterprises" DB13/2322-2016

The proposed process route uses "catalytic combustion + electrostatic precipitation + plasma photo-oxygen" for effective waste gas treatment. The process equipment diagram is as follows:

催化燃烧+静电除尘+等离子光氧

(1) After the waste gas is pretreated to remove dust and particulate matter, it is sent to the activated carbon adsorber. When the activated carbon adsorber Ⅰ is close to saturation, firstly, the treated gas is automatically switched to the activated carbon adsorber Ⅱ (activated carbon adsorber Ⅰ stops adsorption operation), and then the hot airflow is used to desorb and desorb the activated carbon adsorber Ⅰ to desorb the organic matter from the activated carbon. In the desorption process, the organic waste gas has been concentrated, the concentration is tens of times higher than the original, up to 2000ppm or more, the concentrated waste gas is sent to the catalytic decomposition device, and finally it is discharged as CO2 and H2O.

(2) After completing desorption and desorption, the activated carbon adsorber Ⅰ enters the standby state, and when the activated carbon adsorber Ⅱ is close to saturation, the system automatically switches back and desorbs and desorbs the activated carbon adsorber Ⅱ at the same time, so the cycle works.

(3) When the concentration of organic waste gas reaches 2000ppm or more, the catalytic bed can be maintained in self-ignition without external heating. This solution not only saves the energy consumption greatly, but also reduces the equipment investment because the processing capacity of catalytic decomposer is only 1/10 of the original exhaust gas processing capacity. This solution is suitable for both continuous and intermittent operation.

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2 Secondary demonstration Provide solutions

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