Hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle

Abstract

The invention relates to a hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle which is arranged on a gasification furnace. The hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle comprises a main fuel nozzle which is arranged at the top of a furnace, two steam nozzles which are arranged at the two sides of a furnace arch and two oxygen supply nozzles which are horizontally arranged in a hedging manner, wherein the nozzles are respectively connected with a coal water slurry source, an oxygen source and a steam source, and the openings of the nozzles lead into a hearth of the gasification furnace. According to the invention, an advanced temperature control technology combining a grading oxygen supply temperature control technology and a steam temperature control technology is adopted, combustion intensity and flame temperature in the furnace are effectively reduced, and the aim that ash at the outlet of the gasification chamber is non-fused solid slag; meanwhile, gasification reaction rate and carbon conversion rate are improved, thus gasification solid deslagging on a 'double high' coal type large-scale pressurization entrained bed in China is realized, and the hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle provided by the invention is especially applicable to industrial application of a high-ash (25-27%) and high-ash-fusing-point (FT is more than 1400 DEG C) coal type large-scale gasification device in China.

Description

technical field [0001] The invention relates to a nozzle device, in particular to a combined nozzle with graded oxygen supply and controllable flame coal-water slurry airflow bed capable of realizing dry slag discharge of high ash and high ash melting point coal, and belongs to the technical field of gas and coal. Background technique [0002] Large-scale pressurized entrained-bed coal gasification technology is the core of future clean coal technology, and it is the development of coal-based chemical products (synthetic ammonia, methanol, dimethyl ether, etc.), coal-based polygeneration, IGCC power generation, large-scale hydrogen production, fuel The basis of industries such as batteries is the core technology and leading technology of a coal-based high-efficiency energy system that realizes near-zero emissions of pollutants, and represents the development direction of today's coal gasification technology. At present, large-scale pressurized entrained-bed coal gasification...

AI Technical Summary

Problems solved by technology

A large number of "double high" coal types cannot meet the slagging process requirements of the existing liquid slagging type pressurized entrained entrained gasification technology

Aiming at the problem that the existing liquid slagging pressurized entrained bed gasification technology cannot be applied to a large number of "double high" coal types in my country, develop a new type of graded oxygen supply and controllable flame water coal that is suitable for dry slagging of "double high" coal types in China The slurry entrained entrained nozzle can make up for the deficiency that the existing liquid slag discharge type pressurized entrained bed gasification device is not suitable for "double high" coal types, and expand the application range of pressurized entrained entrained bed gasification technology to coal types, which is of great help to the popularization The large-scale application of large-scale pressurized entrained entrained gasification technology in my country has very important practical significance and broad development prospects for the realization of clean and efficient utilization of coal

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