Technical performance:raw material pretreatment process is simple and raw material is widely available;The tar will not condense when the gas enters the coal-fired boiler at a higher temperature,and the sensible heat if the gas is fully utilized.

Environmental benefits:Due to biomass gas replacement of coal,it reduces CO2/SO2 emissions,while combustion of low calorific value gas in boilers reduces NOX emissions.

Economy:After the biomass gas is added into the boiler system,the efficient combustion of gas forms a high temperature zone,which is conducive to the complete combustion of coal powder.While the coal power system remains efficient ,the efficiency of biomass conversion into electric energy can reach 37%,higher than the existing biomass direct combustion power generation(22-30%).The biochar obtained from gasification can be used as high quality energy,soil conditioner,reducing agent,fertilizer slow-release carrier and carbon dioxide sequestration agent,which have higher economic benefits.

Flexibility:This technical route is suitable for coal-fired power fenerationg units of different capacities.Biomass gasification and reburning to generate power make full use of the original high-efficiency power generation equipment of the power station to ensure higher power generation efficiency in any scale.National policy:Biomass gasification power generation can monitored by gas flow rate,temperature and gas composition parameters to calculate inde

Pendently and electricity and power grid enterprises shall settle separately.At present the way has been officially confirmed by the national development and reform commission(Implementation of Biomass Power Generation Coal Coupling of the Pilot),and it can be offered eith biomass electricity price subsidies.