Control method for a system having reduced nitrogen oxide emissions and for use in a carbon negative emission method

A control method for a system having reduced nitrogen oxide emissions and for use in a carbon negative emission method, the control method comprising:

• providing the system having reduced nitrogen oxide emissions and for use in a carbon negative emission method, the system having reduced nitrogen oxide emissions and for use in a carbon negative emission method comprising a plurality of flow monitoring meters and a plurality of electric butterfly valves, wherein the plurality of flow monitoring meters are respectively disposed on an outlet pipeline of an air blower, an outlet pipeline of a water vapor generator, a first outlet pipeline, and an outlet of a second pipeline, and wherein the plurality of electric butterfly valves comprise:
• a first electric butterfly valve disposed on the outlet pipeline of the air blower;
• a second electric butterfly valve disposed on the outlet pipeline of the water vapor generator;
• a third electric butterfly valve disposed on a fourth pipeline;
• and
• a fourth electric butterfly valve disposed on the outlet of the second pipeline;
• subjecting a biomass in the system having reduced nitrogen oxide emissions and for use in a carbon negative emission method to at least one of a pure pyrolysis reaction and a pyrolysis coupling partial gasification reaction,
• wherein when the system having reduced nitrogen oxide emissions and for use in a carbon negative emission method is used to subject the biomass to a pure pyrolysis reaction, closing the second electric butterfly valve and the third electric butterfly valve;
• opening the first electric butterfly valve and introducing nitrogen, and opening the fourth electric butterfly valve;
• wherein when the system having reduced nitrogen oxide emissions and for use in a carbon negative emission method is used to subject the biomass to a pyrolysis coupling partial gasification reaction, opening the first electric butterfly valve, the second electric butterfly valve, the third electric butterfly valve and the fourth electric butterfly valve, supplying air using the air blower;
• adjusting a flow of water vapor entering the system having reduced nitrogen oxide emissions and for use in a carbon negative emission method, air and fuel gas generated in a combustion chamber of the system having reduced nitrogen oxide emissions and for use in a carbon negative emission method together with water vapor precipitated when drying the biomass fuel, by controlling opening degrees of the first electric butterfly valve, the second electric butterfly valve and the third electric butterfly valve, thereby adjusting a component ratio of pyrolysis gas/gasification gas, a yield of the pyrolysis gas/gasification gas and a yield of inorganic carbon.