Gasification device for solid fuel and method for producing synthetic gas

Abstract

The invention provides a gasification device for solid fuel, which comprises a gasification chamber and a cooling purification chamber. A first cooling medium distributor (5) is arranged at an inlet of the cooling purification chamber, and is used for injecting a low-temperature cooling medium into high-temperature synthetic gas from the gasification chamber along the circumferential direction, thereby making the high-temperature synthetic gas cooled and removing solid impurities from the high-temperature synthetic gas. The invention also provides a method for producing synthetic gas, which comprises the steps: ensuring that the quick incomplete reaction of the solid fuel and an oxidizing agent is performed to generate the high-temperature synthetic gas; and injecting the low-temperature cooling medium into the high-temperature synthetic gas along the circumferential direction to purify the high-temperature synthetic gas and make the temperature of the high-temperature synthetic gas reduced. The device and the method improve the purity of the synthetic gas which is finally obtained by temperature reduction, impurity removal and heat recovery for multiple times; and the device has high carbon conversion rate, and also has good complementary energy and waste heat recovery effect, low water consumption and no pollution.

Description

technical field [0001] The invention relates to a device for generating synthesis gas by reacting solid fuel and gasification agent and a method for producing synthesis gas, in particular to a coal gasification device and a method for producing synthesis gas. Background technique [0002] Solid fuel (mainly coal) gasification is a direction of fuel utilization technology. Its task is to convert solid combustibles into combustible gases or chemical raw materials that are easy to burn—the main component is a mixture of carbon monoxide and hydrogen. [0003] According to the flow mode of fuel in the gasification bed, it can be divided into three types: fixed bed, fluidized bed and entrained bed. The entrained bed gasification method has the advantages of strong processing capacity of a single furnace, wide adaptability of coal types, high carbon conversion rate and good load regulation, which represents the development direction of gasification technology in the future. [000...

AI Technical Summary

Problems solved by technology

The aforementioned CN1775920A and CN201065399Y both adopt the chilling process, which needs to consume a large amount of water and also loses a large amount of heat, and is generally only suitable for the production of chemical raw material gas

CN2700718Y adopts the waste boiler process, which can recover the waste heat in the gas, but it needs to set up a separate waste heat boiler, and the hot gas carries a large amount of fly ash, which brings hidden dangers to the continuous operation of the waste heat boiler

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