The mechanism and reaction process of biomass gasification have been discussed

and a new type double bed straw pyrolysis process being put forward on the basis of studying the biomass pyrolysis mechanism

and studying the coal pyrolysis and MSW incineration process and equipment.The said straw pyrolysis process uses the cyclic ash as heat-carrying agent

and has many advantages

such as having high energy recovery rate

being beneficial to environmental protection

boasting high calorific value of produced gas——about(10~13)MJ/m3(standard state).The designed facility has gas-producing capability of 1 500 m3/h

it can process straw of 22 thousand tons in one year.