SU1574979A1 - Method of operation of boiler unit - Google Patents

Abstract

The invention relates to the field of power engineering and makes it possible to increase efficiency by reducing the ballast component of the ash that is returned to the furnace. From the ash produced by burning solid fuel in the ash collector 5, a small fraction is separated that does not contain a fuel component. The coarse fraction enters the separator 8, where, after separation of coarse particles from it larger than the maximum size of the fuel, also not containing the fuel component, is returned to combustion in the combustion chamber 3. 1 il.

Description

• The invention relates to a power system and can be used in boiler plants of power plants and other industrial boiler houses when burned in solid fuel boiler plants in boiler plants.

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The purpose of the invention is to increase efficiency by reducing the ballast component of the ash "

The drawing shows a boiler tanovka in which this method can be implemented.

The boiler plant contains a dust preparation system 1 with a fuel pipe 2 of raw coal connected to a combustion chamber 3 with liquid slag removal of a boiler unit 4, and two-stage ash collectors 5 and 6. An ash collector 5 is connected to ash separator 7 with a separator 8, the branch pipe of the removal of large particles of which is connected to the hopper by a pipe 9 10, and pipes for the removal of small particles - by a pipe 11 - to the ejector 12. The latter at the inlet is connected to a 13 t blower

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, and at the exit by the pipeline

- to the combustion chamber 3 "Zolouoviel 6 eoloprovod 15 connected to the unker 10, and the duct 16 - with the smoke exhaust 17.

Method of operation-boiler installation

It is carried out as follows.

Coal via fuel line 2 enters the dust preparation system 1,

Where is its drying and grinding. ^ 5 The finished dust is fed to the combustion chamber 3 of the boiler unit 4 for combustion. The resulting slag is discharged from the combustion chamber 3 to the system 40 for slag removal, and fly ash with the flue gases first goes to ash collector 5, and then to ash collector 6. Cleaned from ash, flue gases are removed from the boiler installation through the flue 16 when the smoke exhauster 17 is washed. ¹

In ash collector 5 there is a separation of ash into large and small | Fractions. The fine fraction with flue gases enters the ash collector 6, and the large fraction through the ash pipe 7 enters the separator 8, where a private trap is separated from it with a size exceeding the maximum particle size of the fuel supplied from the dust preparation system 1 to the combustion chamber 3. J-. And particles through pipeline 9 enter the hopper 10, where also a fine fraction of zoc trapped in the ash collector 6 is received through ash / ode 15 “A large fraction of ash, purified from a fine fraction that does not contain a fuel component, and large particles that are sintered slag and also not containing fuel leaving, the ejector 12 are returned to combustion through a pipe 14 in the combustion chamber 3.

Thus, in the ash returned to the combustion chamber 3, the ballast component is reduced.

Claims (1)

Claim The method of operation of the boiler plant by supplying solid fuel to the combustion chamber, cleaning the flue gases from the ash, separating the ash into large and small fractions with subsequent return of the large fraction to the combustion chamber, characterized in that, in order to increase efficiency by reducing the ballast component of the ash, the return of a large fraction to the combustion chamber from it is additionally separated by particles with a size greater than the maximum size of the particles of fuel fed to the combustion chamber.