Staged powder spraying entrained bed gasification furnace and gasification method thereof

Abstract

The invention relates to a staged powder spraying entrained bed gasification furnace, which comprises a gasification chamber and a quench chamber, and is characterized in that: the gasification chamber also comprises a gasification nozzle which is formed on the top of the gasification chamber and of which the axis is overlapped with the axis of the gasification chamber; the gasification chamber also comprises a plurality of combustion nozzles which are uniformly arranged on the upper wall of the gasification chamber along the upper periphery of the gasification chamber, and of which the axes form an angle of 0-90 degrees with the axis of the gasification chamber. The invention also relates to a method for gasifying powdery solid fuel in the gasification furnace. One part of fuel is sprayed together with an oxidant into the gasification chamber through the combustion nozzles, and is combusted, and a high temperature area is formed on the upper part of the gasification chamber; and the other part of fuel and a gasification agent are sprayed into the gasification chamber through the gasification nozzle, preheated on the top of the gasification chamber, and enters the high-temperature area for gasification. The service life of the nozzles can be effectively prolonged, the retention period of the fuel in the gasification chamber can be prolonged, higher carbon conversion rate can be achieved, and the gasification furnace can treat fuel with higher caking property.

Description

technical field

[0001] The invention belongs to the technical field of clean utilization of carbon-containing fuels, and in particular relates to a staged powder-spraying entrained gasifier, in particular to a method for producing crude gas mainly composed of carbon monoxide and hydrogen by using powdered carbon-containing fuels, An entrained-bed gasification furnace with staged powder spraying, and a gasification method thereof. Background technique

[0002] Gasification refers to a series of chemical reactions between the organic matter in the carbon-containing fuel (coal or biomass) and the gasification agent (such as steam / air or oxygen) under a certain temperature and pressure in a specific device, and the solid fuel Converted to CO, H 2 、CH 4 Process such as combustible gas. With the increasing shortage of natural gas and oil resources in the world, countries all over the world have carried out process development and industrialization research on the gasification o...

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