SU94035A1 - Sectional gas generator - Google Patents

Description

The known sectional gas generators for the gasification of fine-grained fuels have serious drawbacks, which are expressed in the fact that there are mechanisms in the gas generators sealing the layers of fine-grained fuel. With the help of these mechanisms, the transfer of fine-grained fuel in a compacted form from the fluidized bed of one section to another is carried out. This reduces operability and complicates the design of the gas generator.

The proposed sectional gas generator eliminates these drawbacks by transferring fine-grained fuel from the fluidized bed of one section to another by the injection method, for which injectors are placed directly in the fluidized bed.

The drawing shows a diagram sekionnogo gas generator.

The sectional gas generator is intended for gasification of fine-grained fuel in a “gas bed”. The individual stages of the gasification-suspension process, semi-coking and gasification are carried out in successively placed sections 1.2 to 3 with fluidized beds. The transfer of fine fuel from one section to another is carried out

by the injection method, conducted towards the main gas note with the help of injectors 4 and o, the mixing chambers of which are placed in fluidized beds.

The gasification products enter the sections through tuyeres (5 and 7 in the direction usual for the direct process.

Fresh fuel from the bunker 8 is introduced by screw 9 into the "baking layer of the upper section / gas generator, in which it is subjected to the essence and the initial heat treatment. From the fluidized bed of the first section, dried fuel by Injector 4 is introduced together with part of the gas to the second section 2, where it is subjected to semi-coking.

Semi-coke from the "boiling off second section" is introduced by the injector 5 into the "boiling bed" of the third section 3, in which it is subjected to gasification.

An air blast is fed to the pipe 10 into the blast box 11 and introduced into the "boiling bed" of the third section through the center 12.

The generator gas from the third section of the tuyere 6 is introduced into the lower part of the second section, where it transfers part of the heat to the semi-coking of the fuel in a fluidized bed. From wto

Section swarms A mixture of generating and semi-coke gas is introduced through tuyeres 7 into the lower part of the first section, where it gives off heat to dry fresh fuel in a fluidized bed. The mixture of gases, formed as a result of gasification, semi-coking and drying, is outputted by the short-circuit gas generator through pipe 13 and sent to cyclone 14 to trap the entrained fuel dust.

As the working fluid supplied through pipes V5 and M to the injectors 4 and 5, steam or gas from any section of the gas generator is used, which is injected by the gas blower / 7. The same gas transports the pneumatic conveyor through pipe 18 of the fuel dust trapped by the cyclone 14 in a skimmer, layer of the gasification chamber 5.

Subject invention

Sectional gas generator for gasification of fine-grained fuel with the implementation of individual stages of the working process in successive "fluidized beds, characterized in that, in order to improve the reliability of the gas generator, the transfer of fine-grained material from the fluidized bed of one section to the fluidized bed of another section It is carried out by the injection method, which is directed towards the main gas flow without compaction of the fine-grained material using injectors placed directly in the "fluidized beds".