Method and apparatus for preparing high temperature composite gasifying agent

Abstract

The invention discloses a method and an apparatus for preparing a high temperature composite gasifying agent. The composite gasifying agent comprises the following gases, by volume, 8-12% of CO2, 15-18% of H2O, 7-10% of O2, and the balance N2. The method comprises the following steps: gaseous fuels are combusted by a combustor, the excess air factor is controlled at 1.05-1.2, a high temperature smoke is generated, and the temperature of the smoke which contains, by volume, 8-12% of CO2 and 15-18% of H2O is controlled at 1100-1300DEG C, and a certain amount of O2 is supplied to the high temperature smoke, so the volume percentage of O2 in the high temperature smoke reaches 7-10%. The method for preparing the high temperature composite gasifying agent has the advantages of simple usage equipment, high energy utilization efficiency, and good economy.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature composite gasification agent, and also relates to a device for realizing the preparation method of the high-temperature composite gasification agent. Background technique [0002] Flameless gasification technology is an efficient and clean gasification technology proposed in recent years. It adopts the principle of flameless gasification. There is almost no obvious boundary between the dry pyrolysis, redox and gas reformation reactions of gasification raw materials. The reaction is rapid and dispersed in the entire reaction space, and the temperature distribution in the entire reaction space is uniform. And maintain it at a very high level, which is beneficial to the reforming reaction of gas and the cracking of tar, so as to produce clean synthetic gas with high calorific value. [0003] A basic condition that must be met to realize flameless gasification is that the temperature of t...

AI Technical Summary

Problems solved by technology

Air is used as the gasification agent, which is cheap and easy to obtain, but about 79% of the nitrogen in the air does not participate in the gasification reaction, so that the nitrogen content in the synthesis gas is high, which reduces and limits the calorific value of the synthesis gas

Using oxygen as gasification agent can significantly increase the calorific value of synthetic gas, but the consumption of oxygen is large, which increases the cost of gasification agent and reduces the economy of the gasification system

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