Efficiency of application of various layout arrangements of oil-gas burners in thermal power plant boilers

Abstract

The necessary intensity of burning and completeness of fuel burning out in furnace volume are reached by the correct supply organization and the subsequent mixture of fuel with secondary air that is provided with burner devices. Experimental research of fuel oil and gas combustion efficiency in boiler furnaces of thermal power plant has shown that, the peripheral axial twist executed in the form of two channels with axial scapular air rotator is preferable. The combined gas supply is perspective: tubular peripheral and pilot central. For fuel oil combustion at large expenses the most effective burning is reached due to application of steam-mechanical nozzles which main lack is the considerable length of a torch. The two-tiered arrangement of burners in boiler at combustion of gas and fuel oil is more effective, in comparison with single-tier, both at the counter direction, and at unilateral frontal. For increasing the efficiency of combustion of fuel at some burners types in a boiler furnace the ascending vertical rotation of a torch can be created by the asymmetrical counter arrangement of burners of the first and second tiers. Use of the smoke exhauster of gases recirculation for reduction of harmful emissions of nitrogen oxides with boilers flue gases gives bigger effect in comparison with optimization of the choice of a layout arrangement of burners and parameter of a twist.

Increasing the efficiency of the use of oil fuel in thermal power stations and boilers

“…Therefore, for the cleaning of large-scale gas emissions in the energy sector, high-speed devices are employed, where the gas velocity can reach 40-50 m/s. In a study, it was demonstrated that a tubular film apparatus operating with a downward concurrent flow at a gas velocity of 30 m/s achieves a gas purification efficiency of up to 90% for SO2 and NO2, which falls short of meeting the Maximum Permissible Concentration (MPC) standards for thermal power plants (TPPs) [9][10][11]. Table 2 presents comparative experimental data on the operational parameters of boilers under different steam loads during gas combustion using burners of various designs and placements within the boiler furnace.…”

Study of the speed of flame distribution in the combustion of methane-hydrogen fractions

“…The heat share of the MHF of 25% in a mixture with Urengoi gas has been accepted as promising for burning in modernized burners of TGM-84B boilers. The calculation of the flame propagation speed and concentration limits of ignition was performed using the programs described in [2][3][4][5][12][13][14][15].…”

“…A distinctive feature of the use of hydrogen as a fuel is the high rate of flame propagation and the relatively low heat of combustion [1, p.6-8]. The methane-hydrogen fraction due to the volatility of the composition and a wide range of changes in the heat of combustion was recently used in refineries for their own needs as an insignificant additive to combusted natural gas in process furnaces [2][3][4][5]. If the methane-hydrogen fraction was not utilized as a fuel in these furnaces, it was burned in flares.…”