SU1214988A1 - Arrangement for gasification of solid fuel - Google Patents

Description

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The invention relates to the incineration and processing of solid fuels and can be used in thermal power plants.

The aim of the invention is to improve the economy.

FIG. I shows a block diagram of the solid fuel gasification plant of FIG. 2 - installation, longitudinal section in FIG. 3 shows section A-A in FIG. 2

The device for gasification of solid fuel contains a bunker, 1 source of fuel, a fluidized bed furnace 2 consisting of coking chambers 3, a heating chamber 4 to gasification chamber 5, and a closed circulation loop, followed by a coking chamber 4. The separator 6 is made in the form of a dryer, a gas blower 7 and a heat exchanger 8. A coking chamber 3, a dust collector 6, a gas blower 7 and a heat exchanger 8 are interconnected by means of circulating gas pipelines 9. The heat exchanger 8 is connected to the gasification chamber at the inlet to the nozzle 10 of the gas outlet of the gasification chamber 5 and the gas pipeline 11 to the gas tank 12 at the outlet. On the gas pipeline 11 between the heat exchanger 8 and the gaogolder 12 there is a dust filter 13, a blower 14 and a valve 15. The device also contains the second fluidized bed furnace 16 for heating the inert nozzle and the hopper 17 of the sulfur-absorbing nozzle. The hopper 17 is connected via a feeder 18 to a Bushing 6 provided with a conveyor 19 and a window 20 for outputting the gas through which it is connected to the pipeline 9.

The inlet 21 of the fluidized bed furnace 16 is connected to the gasification chamber 5, and the outlet 22 to the coking chamber 3. In the outlet pipe 22 of the furnace 16 is placed a feeder 23. The furnace 16 is equipped with a burner 24 connected by a pipe 25, provided with a valve 26, with a gas pipeline 11. The furnace 2 of the boiling bed is provided with a gas distribution grid 27, and the chambers 3, 4, 5 are separated baffles 28. The gas distribution grid 27 is made of inclined in the direction of movement of non-pilot channels with directional blast. Cameras 3, 4, 5

ABOUT

supplied with blowing ducts 29, 30 and 31. Dulling ducts 29 and 31, respectively, of the coking chamber 3 and gasification 5 are connected to the pipeline 9, and the blowing duct 30 of the heating chamber 4 to the air source. For gasification, low-moisture Toshv and adjustment of the process in the gasification chamber 5, the latter is equipped with perforated pipes

32dl steam supply.

Camera 4 warming-up by the FLEXIBLE window

33 is connected to the superlayer space of the furnace 16, the gas distributor and the grill 34 of which is connected to the blow box 30 of the chamber 4. The chamber 5 is connected to the furnace 16 by windows 35 for conveying material.

The separator 6 is connected to at least 3 coking with chute 36. A water cooled tube is installed between the coking chamber 3 and the dust collector 16 on the pipe 9. A solidification gasification device works as follows.

The coal from the bunker 1 and the sulfur absorbing nozzle from the bunker 17 are fed to a dust collector (dryer) 6, where they are dried with gases coming from the coking chamber 3. Dried coal with a sulfur-absorbing nozzle using conveyor 19 is supplied to a coking chamber 3, where heat treatment pyrolysis and gasification takes place in a fluidized bed at 500-700 ° C to produce coking gases and coke. Heat for heat treatment is transferred by an inert nozzle heated in a fluidized bed furnace 16 to 800-900 seconds. The coke and inert packing from the coking chamber 3 enters the heating chamber 4, and the resulting gases enter the separator (dryer) 6, where the passage through the bed of coal and the inert packing is dedusted. At the same time, the resins and heavy hydrocarbon fractions are condensed on the surface of the coal, which also contributes to the separation of the gases of the gas stream. Part of the coke in the chamber 4 of the heating is burned in a fluidized bed, fluidized by air coming from the box 30. The remaining 30

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The coke and inert nozzle is heated to 800-900 C. The flue gases through the window 33 enter the over-bed space of the furnace 16, and the coke and the inert nozzle enter the gasification chamber 5. Pseudodescension

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The fluidized beds in chambers 3 and 5 are provided with circulating gases supplied by the gas blower 7 from the dust collector 6. In the gasification chamber 5, the circulating gases containing water and carbon dioxide are reduced by coke carbon, increasing the heat of combustion of the gas. The gas thus obtained enters the gas-holder 12, while heating the circulating gas in the heat exchanger 8. In addition, in the gasification chamber 5, nitrogen oxides are reduced to molecular nitrogen, and the sulfur compounds react with the magnesium and calcium oxides contained in the ash and the sulfur absorbing additive. Additionally, to increase the yield of combustible gases in the gasification chamber 5 through

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perforated pipes 32 are supplied with steam.

Perforated partitions 28 exclude ballasting of combustible 5 gases of chambers 3 and 5 with flue gases of chamber 4 of heating, not preventing the passage of material from chamber to chamber. A portion of the resulting combustible gas B from the gasification chamber 5 is fed 10 through conduit 25 to the burner 24 of the fluidized bed furnace 16, in which the inert nozzle is heated, coming from the gasification chamber 5. The tube bundle 37 provides and regulates the temperature mode of drying in the dust collector (dryer) 6 and simultaneously performs the functions of the baffle of particles carried out of the coking chamber 3.

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Compiled by V.Kruglnsky Editor NDCHvshchka Tehred T.Tulik Proofreader G. Reshetnik

, Order 899/50 Circulation 515 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Filial PPP Patent, g, Uzhgorod, st. Design, .4

A- A

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Claims (1)

A DEVICE FOR GASIFICATION OF A SOLID FUEL containing a source fuel tank, a fluidized bed furnace consisting of coking, heating and gasification chambers, the last of which is equipped with a branch pipe, in which a dust collector and gas blower are sequentially connected after the coking chamber, characterized in that, with in order to increase efficiency, it additionally contains a second fluidized bed furnace for heating the inert nozzle, the input and output of which are connected respectively to the gasification and coking chambers, a heat exchanger, installed in the circulation circuit between the gas blower and the coking chamber and connected via a cooled medium to the gas outlet pipe, and a source of sulfur-absorbing nozzles connected together with the source fuel hopper to the dust collector, the latter being made SU „., 1214988 ί 121