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Brief description of waste incineration flue gas treatment

Views: 12     Author: Xicheng Ep Ltd     Publish Time: 2021-10-06      Origin: Xicheng Ep Ltd

Municipal solid waste and industrial waste produced by the fair industry can provide corresponding heat by incineration, and then convert the heat into generator power for power generation. This is a new type of power generation method with reduced, harmless and resource-based The characteristics of it have considerable benefits to society and the environment. Domestic waste is usually burned in a special waste incineration boiler. Due to the favorable conversion characteristics of waste incineration, the industry has developed rapidly in recent years. However, while the waste is getting good energy conversion, the problem of secondary pollutant emissions from waste incineration has been reduced. Put it on the agenda.

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The components in domestic and industrial waste include compounds related to carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus and halogen. These compounds react with oxygen during the combustion process to form a variety of harmful pollutants. These pollutions Substances include dust, heavy metals, toxic substances, dioxins, carbon monoxide, sulfides, nitrides and other harmful gases.

From the perspective of pollutant control and treatment, it can be analyzed from three aspects: grasping the source, controlling combustion in the boiler, and flue gas treatment.

1. Speeding up garbage classification is the primary task, strengthening resource recycling, and using recyclable shopping bags when shopping is an environmental behavior that every citizen should do;

2. A suitable boiler structure should be used to allow the garbage to be fully burned in the boiler. If the combustion is not sufficient, a large amount of carbon monoxide will be produced. In addition, the flue gas outlet temperature in the incinerator should be controlled not to be lower than 850°C. Reasonably control the air volume, temperature and injection position of combustion air;

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3. It is necessary to carry out flue gas treatment and flue gas monitoring, use a bag filter for dust treatment, and carry out three purification methods for acid gas: dry scrubbing, wet scrubbing, and semi-dry scrubbing, aiming at nitrogen oxidation Use selective non-reduction reaction technology or selective catalytic reduction technology to select the purification technology correspondingly to improve the purification effect;

After flue gas treatment, the continuous flue gas emission monitoring system can continuously monitor SO2, NOX, 02 (standard, wet basis, dry basis and conversion), particulate matter concentration, flue gas temperature, pressure, flow rate, flue gas humidity, etc. Relevant parameters, and statistics of emission rate, total emission, etc., so as to effectively manage the measured data.

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