METHOD TO CONTROL GAS TIGHTNESS OF WORKING AREA IN ENERGY TECHNOLOGY UNITS Russian patent published in 2013 - IPC F27B1/26 C21B7/24 G05D16/00 

FIELD: power engineering.

SUBSTANCE: method includes setting the required pressure in the working area of a unit, measurement of pressure in the working area of the unit, comparison of the measured value with the set one and generation of a control action at a gate or a shutter in a smoke tract. After measurement of pressure in the working area, oxygen concentration is measured in effluent smoke gases, as well as fuel consumption and coefficient of air excess according to the ratio "fuel-air for combustion", afterwards the value of atmospheric air suctions is measured into the working area of the unit in accordance with the following formula: $$G_s=G_f\left[\frac{{С}_o{V}_0}{\mathrm{0,21}-C_o}-\left(\alpha -1\right)L_0\right],$$ , where G_s - volume of atmospheric air suctions, m³/hr; G_f - fuel consumption, m³/hr; C_o - oxygen concentration in combustion products, volume fractions; α - coefficient of air excess according to the ratio "air-air for combustion"; L₀ and V₀ - air quantity theoretically required for combustion of 1 m³ of fuel and theoretical yield of combustion products per 1 m³ of fuel accordingly, m³/m³, and the setting of the required pressure is corrected in the working area of the unit until achievement of the atmospheric air suctions value G_n, equal to zero.

EFFECT: reduced fuel consumption and increased thermal efficiency.

2 dwg, 1 ex