Two-section type multi-nozzle gasifying furnace with hierarchical oxygen supplying function and gasifying method of gasifying furnace

Abstract

The invention relates to a two-section type multi-nozzle gasifying furnace with a hierarchical oxygen supplying function. The two-section type multi-nozzle gasifying furnace comprises a gasifying furnace body. A top technical nozzle chamber with a top technical nozzle inside is arranged on the top of the gasifying furnace body, at least two side technical nozzle chambers with side technical nozzles inside are arranged on sides of the gasifying furnace body, a discharge outlet is arranged at the bottom of the gasifying furnace body, and at least two secondary oxygen supply spraying gun chambers are arranged on the straight section, between the side technical nozzle chambers and the discharge outlet, of the gasifying furnace body. The two-section type multi-nozzle gasifying furnace with the hierarchical oxygen supplying function is characterized in that the side technical nozzle chambers and the secondary oxygen supply spraying gun chambers are symmetrically arranged on the periphery of the gasifying furnace body, and secondary oxygen supply spraying guns are mounted in the secondary oxygen supply spraying gun chambers. The invention further provides a gasifying method of the two-section type multi-nozzle gasifying furnace with the hierarchical oxygen supplying function. Temperature in the gasifying furnace is more uniform and reasonable in distribution and local high temperature inside the gasifying furnace is avoided.

Description

technical field [0001] The invention relates to a carbon-containing material gasification device, in particular to a two-stage multi-nozzle air-flow bed gasification furnace with graded oxygen supply and a gasification method thereof. Background technique [0002] In the process of gasifying carbonaceous substances such as coal and coke in the existing entrained gasification technology, fuel and oxygen are generally fed into the same burner at the same time, such as US patents US4707163, US4637823, US4527997 and Chinese patent CN200980132394.3. Due to the inability to control the reaction state in the gasifier, the temperature distribution in the gasifier is unreasonable. There are high-temperature, high-pressure multiphase flow, heat transfer and complex gasification reaction process in the entrained bed gasifier, so the special protective material for the inner wall of the furnace will directly determine the safe operation of the gasifier. In order to solve the local high...

AI Technical Summary

Problems solved by technology

The above-mentioned two-stage multi-nozzle gasifier uses the top nozzle to divert the gasification agent to the lower nozzle, and the flame distribution in the entrained bed gasifier is directly related to the oxygen distribution, so that the gasification and combustion in the lower part of the gasifier generate local high temperature , leading to a short service life of the furnace wall lining material in the high temperature zone of the gasification chamber in the lower section of the gasifier

[0003] From the current operating conditions of entrained bed gasifiers at home and abroad, it can be found that the short service life of wall materials in some areas of the gasifier is one of the main factors affecting the long-term stable operation of the gasifier. The distribution is more uniform and reasonable, and avoiding local high temperature in the gasifier is one of the main ways to solve the short service life of the inner wall material of the gasifier

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