SU1366785A1 - Method of joint burning of coal dust and dispersed fuel coagulant - Google Patents

Abstract

Invention m. used in thermal power plants. The invention allows to increase the economy and reliability. Coal dust through the burners 2 and the fuel coagulum through the burners 3 together with the air inlet into the combustion chamber 1. The fuel coagulum is dispersed by nozzles 7 when it is introduced into chamber 1. The coagulum is fed into the combustion chamber 1 by droplets with an average particle size of 50-200Q µm along the axis of chamber 1, and dust is supplied along the walls with a mass flow ratio of 0.03: 0.6. 5 il. i SL С 00 О) о: (X) СЛ фие. /

Description

one

This invention relates to a fuel combustion technique and can be used in thermal power plants.

The purpose of the invention is to increase efficiency and reliability.

FIG. 1 shows a boiler for the implementation of the proposed method, a longitudinal section; figure 2 - section. A-A in Fig. 1 in Fig. Zi 4 is a boiler for the implementation of the proposed method, a longitudinal section, examples of the design of J in Fig. 5, and a section B-B in Fig. 3.

The boiler contains a shielded combustion chamber 1 with cauldron burners 2, coagulum burners 3 and combined burners 4, and also a convective flue 5. with heating surfaces 6. The burners 3 are equipped with nozzles and are located along the axis of the combustion chamber 1, and the pie-coal burners 2 are located along the walls of the combustion chamber 1.

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3667852

Screening increases the stability and intensity of ignition and burnout, provides an effective reduction of maximum temperatures in the center of the combustion chamber 1 due to the involvement of cold water ballast of coagulant mass during combustion and heat and mass transfer. Input

1Q of dust into the peripheral area of chamber 1 along the walls of the latter ensures an intense decrease in the maximum temperatures of the combustion products of piezoelectric flames, which occurs as a result of their cooling by screens and turbulent heat and mass transfer with the central cooled flow of the coagulum combustion products. Reducing the maximum temperatures in products

2Q of combustion leaving the chamber 1 reduces the risk of slagging and destruction of the pipes of heating surfaces 6 placed in a convective gas duct 5, where gases are sent from chambers 1.

The method of co-firing of coal is: 25 The cooled products of combustion of dusted dust and dispersed fuel are fused from a 5 flue gas duct and a coagulum is carried out as follows is discharged into the atmosphere through the flue gas

pipe. Coagulum spraying with nozzles 7 drops with an average size of 30

in a way.

Coal dust through the burners 2 and fuel coagulum through the burners 3 together with the air are introduced into the combustion chamber i. The fuel coagulum is dispersed by the nozzles 7 when introduced into the chamber 1. Primary combustion of the pulverized fuel occurs primarily. The heat released during the burning of dust is partially removed to the screens of the combustion chamber 1, partly to self-heating and maintaining the burning process of the treadmill flare, partly to warming 7 drops of coagulum sprayed by the nozzle, as a result of which moisture evaporates and evaporates, temperature flow reaches the level required for ignition of carbon inclusions. The coagulum is fed into the combustion chamber 1 by droplets with an average particle size of 50–2000 µm along the chamber axis, and dust along walls with a mass flow ratio of 0.03: 0.6. Entering the coagulum into the central region of chamber 1 at the indicated ratio of relative costs excludes its direct ocher35

40

45

50

50–2000 µm in terms of their input along the axis of chamber 1 is economically most justified. Load control with a change in the optimal working ratios of coagulum and dust consumption is produced both by controlling fuel consumption through individual burners 2 and 3, and by switching burners 4 from one type of fuel to another:

Claims (1)

Invention Formula The method of co-combustion of coal dust and dispersed fuel-f coagulum by separately introducing them as an air mixture into the combustion chamber, the dust being introduced along the walls of the chamber, characterized in that, in order to improve efficiency and reliability, the coagulum is introduced along the longitudinal axis of the combustion chamber and disperse it to a droplet size of 50-2000 microns, while the massive costs of coagulum and piT are maintained in a ratio of 0.03-0.6. pipe. Spray coagulum nozzles 7 drops with medium size 0 five 0 five 0 50–2000 µm in terms of their input along the axis of chamber 1 is economically most justified. Load control with a change in the optimal working ratios of coagulum and dust consumption is produced both by controlling fuel consumption through individual burners 2 and 3, and by switching burners 4 from one type of fuel to another: Invention Formula The method of combusting coal dust and dispersed fuel-f coagulum by separately introducing them as an air mixture into the combustion chamber, the dust being introduced along the walls of the chamber, characterized in that, in order to increase efficiency and reliability, the coagulum is introduced along the longitudinal the axes of the combustion chamber and disperse it to a droplet size of 50-2000 microns, while the mass flow rates of coagulum and piT are maintained in a ratio of 0.03-0.6. -BUT 2 FiaZ