Gasification nozzle and gasifier

Abstract

The invention discloses a gasification nozzle. The gasification nozzle comprises a conveying portion for conveying a material, and an injection portion connected to the tail end of the conveying portion and used for injecting the material, the conveying portion comprises a conveying main pipe (1) and at least two-stage conveying branch pipes, the conveying main pipe is connected with a first stage conveying branch pipe (31) through a diverter, and adjacent two stage conveying branch pipes are connected through a diverter. At least one diverter comprises a substrate, and the substrate is provided with through holes (211); and each of the diverters comprises polyhedral cone, the side surfaces of the polyhedral cone and parts of the wall of the conveying main pipe or parts of the wall of the previous-stage conveying branch pipe of the adjacent two-stage conveying branch pipes form the guiding surfaces of all the through holes, and the side surfaces of the polyhedral cone cover the top surface of the substrate. The invention also discloses a gasifier provided with the gasification nozzle. The material is uniformly diverted in the gasification nozzle to prevent powder accumulation and obstruction of the material in order to improve the production efficiency of a gasification furnace.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a gasification nozzle and a gasifier. Background technique [0002] Coal gasification technology is the basis for the development of coal-based chemicals, liquid fuels, IGCC power generation, hydrogen production and other processes, and is the leading technology in the coal chemical industry. Due to the rapid development of synthetic ammonia, methanol, dimethyl ether, coal-to-oil, coal-to-olefin and other industries, China's coal gasification process is rapidly transitioning from the old-fashioned UGI furnace lump coal batch gasification to the advanced pulverized coal gasification process. Strong demand for various types of pulverized coal gasification technology and equipment. [0003] The gasification reaction is carried out under high temperature and pressure conditions. Among them, the gasification nozzle is used to make the material such as pulverized coal and the ga...

AI Technical Summary

Problems solved by technology

[0004] However, due to the unreasonable structure of the flow divider in the prior art, the material cannot be divided evenly through the flow divider, and powder accumulation and blockage often occur in the structural dead ends of the flow divider

As a result, the gasification nozzle cannot quickly co-flow and eject the material and gasification agent, and the flame of the gasification nozzle is unstable and uneven; which in turn leads to a low carbon conversion rate of the gasification furnace and a large amount of gasification residue

In addition, the gasification nozzle is located in the high-temperature and pressurized operating environment of the gasification furnace, so the maintenance workload is relatively large, and the frequent blockage of the flow divider increases the maintenance burden of the gasification nozzle, resulting in a decrease in the production efficiency of the gasification furnace

Therefore, the gasification nozzle in the prior art needs to be improved

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