XINLI BOILER

Emission Standards for Biomass Boilers

21 Jan, 2022

　　Biomass fuel is a crop straw biomass boiler known as the "fourth largest energy source". As a new type of environmental protection equipment, it follows "energy saving" from the use of raw materials. Its materials are mainly waste wheat straw, etc. Mainly, both in terms of quality and pollution emissions will be greatly reduced.

　　Regarding the implementation standard of waste gas emission from biomass boiler projects, according to the Ministry of Environmental Protection's "Reply Letter on Issues Related to Biomass Briquette Fuel" (Huanbanhan [2009] No. 797), the air pollution emissions of biomass briquette fuel in the combustion process Strict standards are put forward: "the gas emission standards should be used to require" biomass briquette fuel to reduce air pollution as much as possible.

　　1. Gas emission standards

　　According to expert analysis, biomass fuel boilers can achieve zero CO2 emissions, trace NOx emissions, SO2 emissions of less than 33.6mg/m3, and soot emissions of less than 46mg/m3 after combustion. Compared with coal-fired and oil-fired boilers, its pollution The index is already low. According to the national air pollutant emission control indicators, the boiler emission standards are: SO2≤100mg/m3, soot ≤100mg/m3, so the biomass boiler emission standards meet the control indicators, and the emission concentration is far lower than the national standard.

　　2. Solid emissions

　　In addition to the exhaust gas, the biomass boiler also discharges solids, and the main component of the solids is the ash after combustion. The fuel contains about 70% of the fiber content, the sulfur content is less than 1/10 of the carbon content, the sulfur and chlorine content are both less than 0.07%, and the nitrogen content is less than 0.5%, so the content of solid ash is also relatively low, coupled with dust removal equipment The solid dust discharged from the purification treatment is almost negligible, which meets the national emission standard.

　　3. For power generation boilers using biomass fuels such as bagasse, sawdust, bark, etc., with a single output of 65t/h or more, refer to the comprehensive utilization of resources stipulated in the "Emission Standard of Air Pollutants for Thermal Power Plants" (GB13223-2003) The pollution of thermal power generation boilers Material control requirements are implemented.

　　4. For power generation boilers with a single output of 65t/h and below that use biomass fuels such as bagasse, sawdust, and bark, refer to the "Boiler Air Pollutant Emission Standard" (GB13271-2001) The maximum allowable emission of air pollutants from coal-fired boilers Concentration performed.

　　5. Where there are local emission standards that are stricter than the national standards, the local emission standards shall be implemented.

　　6. For projects that introduce foreign combustion equipment, under the premise of meeting my country's emission standards, the pollutant emission limit should meet the design and operation value requirements of the imported equipment supporting pollution control facilities.