Overhead type multi-nozzle coal-water slurry gasifier

Abstract

The invention discloses an overhead type multi-nozzle coal-water slurry gasifier. The overhead type multi-nozzle coal-water slurry gasifier comprises a coal-water slurry gasification furnace, a furnace hearth, a cover flange, an ignition work-starting burner nozzle and a plurality of coal-water slurry process burner nozzles, wherein the furnace hearth is nested in the coal-water slurry gasification furnace and forms a combustion chamber for coal-water slurry and oxygen gas; the cover flange covers the coal-water slurry gasification furnace; the ignition work-starting burner nozzle is arranged on the cover flange, and the coal-water slurry process burner nozzles surround the ignition work-starting burner nozzle. The number of the coal-water slurry process burner nozzles is increased, so that the power-on rate and operating flexibility of a gasification system can be effectively improved, and the operation and maintenance costs of the coal-water slurry gasification system are further reduced. The overhead type multi-nozzle coal-water slurry gasifier meets the needs of coal-water slurry gasifiers on large-scale development and has very great economic and social benefits.

Description

technical field [0001] The invention belongs to the coal chemical technology field of pressurized gasification of coal-water slurry, and in particular relates to a top-mounted multi-nozzle coal-water slurry gasification device. Background technique [0002] At present, the maximum coal input of the gasification device under construction and in operation in my country using the single-nozzle coal-water slurry process is about 2000t / d. In recent years, with the increasingly fierce competition in the domestic coal gasification industry, how to reduce production costs and increase productivity has become a top priority for major coal gasification companies, and large-scale coal gasification systems are one of the important ways. However, limited by the single-nozzle coal-water slurry process, the current coal input of 2000t / d has reached the working limit of the coal-water slurry process burner, and further increasing the coal input by enlarging the size of the coal-water slurry...

AI Technical Summary

Problems solved by technology

However, limited by the single-nozzle coal-water slurry process, the current coal input of 2000t / d has reached the working limit of the coal-water slurry process burner, and further increasing the coal input by enlarging the size of the coal-water slurry process burner will be due to water The high viscosity of coal slurry leads to the poor atomization effect of coal water slurry under the condition of large flow rate, resulting in a sharp decrease in the conversion rate of the gasification system, which seriously restricts the large-scale development of coal water slurry gasifier

[0003] In addition, since there is only one coal-water slurry process burner in the single-nozzle coal-water slurry plant, the system's start-up rate is low and the operation flexibility is small, which also causes many adverse effects on the operation of the gasification plant

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