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On-line switchover method of multi-nozzle gasifier

A gasification furnace and multi-nozzle technology, which is applied in the gasification of granular/powdered fuels, the manufacture of combustible gases, and the petroleum industry. It can solve problems such as fluctuations in the quality of syngas, large venting volume of syngas, and the impact on stable operation.

Active Publication Date: 2020-03-20
EAST CHINA UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the fact that the existing multi-nozzle gasification furnace on-line switching method has a certain influence on the stable operation of the production device, the quality of the syngas fluctuates during the switching process, and the volume of the synthetic gas vented during the switching process. However, it provides a new type of online switching method for multi-nozzle gasifier gasifier

Method used

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  • On-line switchover method of multi-nozzle gasifier
  • On-line switchover method of multi-nozzle gasifier
  • On-line switchover method of multi-nozzle gasifier

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Embodiment 1

[0050] A method for online switching of a multi-nozzle gasifier, such as figure 1 and figure 2 As shown, the gasification furnace involved in the method includes an operating furnace and a standby furnace identical to the operating furnace; the operating furnace has four nozzles, and the nozzles are arranged in a horizontally opposed installation manner. The middle and upper part of the operating furnace, the nozzle is a three-channel annular casing structure with an outer channel, a middle channel and an inner channel. When the operating furnace is in normal operation, the middle channel is a coal slurry channel, and the outer channel And the inner channel is an oxygen channel; the method comprises the steps of:

[0051] (1) The oxygen in the inner channels of the four nozzles of the operating furnace is replaced by CO 2 , reducing the coal slurry flow rate of the middle channel of the four nozzles of the operating furnace to 85% of the normal operating flow rate;

[0052...

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Abstract

The invention discloses an online turning-down switching method for a multi-burner gasifier. According to the method, in turning-down switching, oxygen in inner passages of burners is substituted withN2 and / or CO2, and saved oxygen is used for starting a standby gasifier. By adoption of the method, minimization of load fluctuation in a turning-down process can be realized, influences on system stability in a switching process are reduced, and important guarantee is provided for safe and stable operation of modern coal chemical industrial devices for entrained-flow bed coal water slurry gasification. In a turning-down process, atomizing effects can be basically kept unchanged, gasifying process performances are guaranteed, and synthetic gas quality is guaranteed. By adoption of the method,oxygen consumption in the switching process can be reduced, oxygen is effectively saved, synthetic gas emptying quantity in the turning-down switching is reduced, and the design margin of an air separation device can be appropriately reduced.

Description

technical field [0001] The invention relates to a method for on-line switching of a multi-nozzle gasification furnace. Background technique [0002] Entrained bed gasification technology has become the mainstream technology in the development of coal gasification today because of its advantages such as large processing load, advanced process technical indicators and good environment. As a country with large coal resources, my country urgently needs large-scale and efficient entrained-bed coal gasification technology to adapt to the rapid development of modern coal chemical industry. At present, there are many types of coal gasification technologies at home and abroad, including: OMB, GE and other coal-water slurry gasification technologies; SE, Shell, GSP, HT-L and other pulverized coal gasification technologies. Among them, after more than 20 years of research and development and industrial operation of the multi-nozzle opposed coal-water slurry gasification technology, in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10J3/72
CPCC10J3/485C10J3/72
Inventor 郭庆华于广锁龚岩许建良王辅臣龚欣刘海峰王亦飞陈雪莉代正华李伟锋梁钦锋郭晓镭王兴军陆海峰赵辉刘霞沈中杰赵丽丽
Owner EAST CHINA UNIV OF SCI & TECH
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