APPARATUS AND METHOD FOR MIXING COMBUSTIBLE GAS AND COMBUSTION AIR, PROVIDED WITH HOT WATER PLANT EQUIPPED WITH CORRESPONDING HEAT MASS FLOW SENSOR, AND METHOD FOR MEASURING MASS FLOW RATE OF GAS STREAM Russian patent published in 2019 - IPC F23D14/60 F23N1/02 

FIELD: physics.

SUBSTANCE: invention relates to the field of power engineering. Device for mixing combustible gas and combustion air for supply to burner comprises air duct for air supply for combustion; gas supply pipeline for supply of combustible gas, which is equipped with adjusting valve; a first metering conduit having a first outer end that is connected to the air duct and a second outer end that is connected to the conduit; a second measurement conduit having a first outer end which is connected to the first metering conduit at a point between the first and second outer ends of the first metering conduit, thus forming three-way intersection point, and having second outer end, which is connected to gas line and/or air pipeline. Heat sensor of mass flow includes the first temperature sensor located in the first measuring pipeline and installed so that it is placed in the gas flow between the three-way intersection point and the air pipeline during use; and a second temperature sensor located in the first measurement conduit and mounted so that it is placed in the gas flow between the three-way intersection point and the gas line during use; controller connected to heat flow mass flow sensor and control valve and configured to control the control valve depending on the difference, measured by heat sensor of mass flow, between mass flow rate of gas flow between three-way intersection point and air line and mass flow rate of gas flow between three-way intersection point and gas line.

EFFECT: invention allows accurate and reliable adjustment of gas-air ratio.

24 cl, 18 dwg