Combined type coal water slurry nozzle provided with ignition device

Abstract

The invention relates to a combined type coal water slurry nozzle provided with an ignition device. The combined type coal water slurry nozzle provided with the ignition device comprises an outer sprayer, a middle sprayer, an inner sprayer and a center pipe which are coaxially arranged, wherein an ignition cable is arranged on the outer wall of the center pipe, a hydrocyclone which can form rotary jet is arranged at the front end of the center pipe, an axial through hole is formed in the hydrocyclone, certain shrinkage is formed at the front end of the center pipe relative to the front end of the through hole of the hydrocyclone, part of or all the circumferential edge of the hydrocyclone is contacted with the inner cavity wall of the front end of the inner sprayer; certain retraction is formed in the front end face of the hydrocyclone relative to the end face reference surface of the inner sprayer, so that a premixing cavity B is formed. The combined type coal water slurry nozzle provided with the ignition device has the advantages that functions of an ignition nozzle and a technological nozzle in a gasifier are combined into one, so that the ignition nozzle and the technological nozzle can not be switched again and again in the whole gasification process, and complex operation in the gasification process is simplified; meanwhile, current required for ignition is small, so that the combustible effect on coal water slurry is improved, the ignition success rate is high, and the produced flame is stable.

Description

technical field [0001] The invention relates to a burner for a coal-water slurry gasifier, in particular to a combined coal-water slurry burner with an ignition device. Background technique [0002] Due to the lack of oil and gas in our country, and relatively abundant coal resources, coal will still dominate for a long period of time in the future, whether as energy or chemical raw materials. To convert coal into chemical raw materials, coal must first be gasified, and coal gasification plays a pivotal role in coal deep processing and coal gasification processes. The pressurized gasification of coal has absolute advantages in improving energy utilization efficiency, environmental protection, realizing operation automation, saving floor space, and large-scale production. At present, traditional coal-water slurry gasifiers are equipped with ignition burners and process burners (coal-water slurry burners). The ignition burner is used to increase the furnace temperature. Afte...

AI Technical Summary

Problems solved by technology

[0004] In the actual application process, the ignition burner and the process burner (that is, the existing coal water slurry burner) are used at different stages at the same time. The disadvantage is: because the ignition burner and the process burner are two independent burners , and the two are used in different stages. The ignition burner is used for initial ignition heating, and the process burner is used after the ignition burner raises the furnace temperature to a certain temperature. The replacement of the two needs to be realized by means of a propulsion device.

Due to the use and replacement of the two burners, the ignition heating process is complicated and the operation is complicated, which indirectly prolongs the time used for heating the furnace temperature

In addition, the structure of the propulsion device is relatively complex and prone to failure, so it will cause difficulties in the production process

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