BIOMASS HEATING PLANT WITH OPTIMIZED FLUE GAS TREATMENT Russian patent published in 2022 - IPC F23C9/06 F23B80/02 F23B60/02 F23H13/06 

FIELD: energy.

SUBSTANCE: invention relates to the field of energy. A biomass heating plant for burning fuel in the form of pellets and/or wood chips comprises a boiler with a combustion device, a heat exchanger with inlet and outlet, the combustion device having a combustion chamber with a primary combustion zone and a secondary combustion zone provided downstream of it, the secondary zone combustion chamber is hydrodynamically connected to the inlet of the heat exchanger, the primary combustion zone is limited from the side by several bricks of the combustion chamber, and the biomass heating plant also has a recirculation device for recirculating the flue gas formed during the combustion of fuel in the combustion device. The recirculating device has a recirculation inlet, which is provided downstream of the heat exchanger outlet and is hydrodynamically connected to it, and a primary air channel for supplying primary air, a primary mixing unit with a primary mixing chamber and a primary mixing channel, the primary mixing chamber being provided downstream relative to of the recirculation inlet and the primary air duct and is hydrodynamically connected to them, and at least two air valves, which are provided on the inlet side of the primary mixing chamber, and a primary passage to the primary combustion zone, which is provided downstream of the primary mixing duct and is hydrodynamically connected to it, and the primary mixing unit is designed so that it can mix the flue gas from the recirculation inlet with primary air from the primary air channel through at least two air valves of the primary mixing chamber.

EFFECT: invention allows to reduce the amount of harmful emissions into the atmosphere.

6 cl, 31 dwg