SU1550289A1 - Method of combustion of solid ground fuel - Google Patents

Abstract

The invention relates to the combustion of fuel, can be used in thermal power plants and allows to increase the efficiency with variable loads. Solid ground fuel flows together with the coolant to reactor 1, where hot gases and char are formed. The semi-coke is sent to the airflow chamber 9, and the combustible gases are directed to condensation, after which the condensate and non-condensed gases are fed separately to the furnace 44 of the boiler. In all modes, the fuel consumption in reactor 1 and semi-coke and air in furnace 9 is kept constant, and the load is adjusted by changing the flow rate of condensate. 1 il.

Description

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This invention relates to fuel combustion and can be used in thermal power plants,

The aim of the invention is to improve the economy in variable modes.

The drawing shows the installation in which the method of burning solid ground fuel is carried out.

The installation contains a semi-coking reactor 1 connected to a separator 2 of a gas-vapor mixture, which is connected to a burner device 5 by a pipe 3 equipped with a valve 4, and a pipe 6 to a mixer 7, a mixer 8 by a pipe 8 connected to an aero-fired furnace 9, and a pipe 10 through a starting one the firebox 11 - to the heat exchanger 12; the Aero fountain fire chamber 9 is connected to the separator 13, which is connected to the burner device 5 by the pipe 14, and the pipe 15 with the divider 16 installed on it to the heat exchanger 12, the pipe divider 16 The ash supply house 17 is connected to a feeder 18, which has a pipe 19 for supplying the initial fuel and a pipe 20 for supplying a heat transfer medium. A feeder 18 is connected via a pipe 21 to a semi-coking reactor 1, a burner 5 by means of a pipe 22, equipped with a valve 23, connected to a pipe 10 to which a suction nozzle of a blower 25 is connected via a valve 24; a pressure nozzle is connected to a heat exchanger 12 through pipe 24 26 and a resin capacitor 27, which are connected to the condensate tank 32 with lines 28 and 29 provided with valves 30 and 31. Capacity 32 pipe 33 with a condensate pump 34 installed on it and pipe 35, equipped with a valve 36, is connected to the burner 5, pipe 37, equipped with a valve 38 to the scrubber 26, and pipe 39 equipped with a valve 40 to the starting firebox. The condenser 27 by pipeline 41 supplying the He-condensed product is attached to the burner 5 "

The scrubber 26 is connected by pipeline 42, fitted with a valve 43, to the pipeline 3. To the burner 5 of the furnace 44 of the boiler is connected

pipeline 45 for supply of gas fuel oil.

Example: Pre-crushed feedstock via pipeline 19 and ash from divider 16 through pipeline 17 is fed to feeder 18, where coolant, for example, products, flows through pipeline 20

Combustion or their mixture with water vapor "From feeder 18 to the initial fuel mixed with ashes via pipeline 21 is sent to reactor 1, where thermal decomposition of the initial fuel takes place with the production of combustible gases and semi-coke. The mixture of these components from the reactor 1 is fed to the separator 2, where they are separated: a part of combustible gases through the pipeline leads to the burner 5 of the furnace 44, and the semi-coke through the pipeline 6 is sent to the mixer 7, where the pipeline 10 is heated in a heat exchanger 12

5 air in an amount corresponding to stoichiometric for incineration of -1 luxoxo0. The resulting mixture through the pipeline delivers 0 into the aerofontal furnace 9, where half of the coke is burned to form ash and flue gases. their separation: the flue gases through pipeline 14 serves

, - into the burner 5, and the ash caught in the separator 13 enters the splitter 16 of the ash flow. In the burner device 5, where the air enters through conduit 22,

0 ignition of the fuel and its subsequent combustion together with the flue gases in the volume of the furnace 44 of the boiler,

In the divider 16, the separation of ash into two streams. One thread

5, the pipeline 17 is sent to mix with the initial fuel to the feeder 18, another stream of ash removed from the cycle in an amount corresponding to the ash content in the initial fuel

0

five

(taking into account the efficiency separators 2 and 13), is fed through conduit 15 to heat exchanger 12, where the physical heat of the ash goes to heat the air entering through conduit 10 to the furnace 9,

A portion of the combustible gases through conduit 42 enters the scrubber 26 and the condenser 27, where the vapors contained in the combustible gases are condensed. The condensate is discharged into tank 32,

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and non-condensed gases - to the burner device 5. During operation, the fuel consumption to the reactor 1 and the consumption of semi-coke and air entering the air-fired furnace 9 are kept constant, which ensures optimal aerodynamics in the reactor 1 and furnace 9, and, therefore, pgvyshaet profitability of their work.

The change in the load of the installation is made by changing the flow rate of condensate supplied by the pump 34 from the tank 32 to the burner 5.

Claims (1)

Invention Formula The method of burning solid ground fuel by heat treatment in the reactor to produce semi-coke and combustible gases, separating them with subsequent feeding for combustion together with air, respectively, in the aero fountain and boiler furnace, separating the flue gases and ashes formed in the aerofontane furnace, and feeding them into the furnace of the boiler and into the reactor, characterized in that, in order to increase efficiency at variable loads, combustible gases are condensed before being supplied to the combustion and carried out separately into the boiler furnace of condensate and non-condensed gases, while the flow rates of the fuel fed to the reactor and of the semi-coke and air supplied to the aerial fountain chamber are kept constant in all modes, and the load is controlled by varying the flow rate of the condensate.