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Method of Controlling Shutdown of Gasifier

A gasifier and nitrogen technology, which is applied in the gasification process, the manufacture of combustible gas, and the gasification of granular/powder fuels, etc., can solve the hidden dangers of gasifier safety and achieve the effect of increasing safety and reliability.

Active Publication Date: 2020-06-05
CHINA SHENHUA ENERGY CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for controlling the shutdown of the gasifier to solve the problem of potential safety hazards in the gasifier in the prior art

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  • Method of Controlling Shutdown of Gasifier
  • Method of Controlling Shutdown of Gasifier
  • Method of Controlling Shutdown of Gasifier

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Embodiment Construction

[0016] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0017] combine figure 1 As shown, according to an embodiment of the present invention, a method for controlling shutdown of a gasifier is provided.

[0018] Specifically, the method includes step S10: sending a stop signal to the gasifier, closing the oxygen upstream shut-off valve and the downstream shut-off valve on the oxygen pipeline of the gasifier, and making the central oxygen valve open with electricity, and the central oxygen and nitrogen purge valve shut down. Power off. Step S20: After starting the oxygen pipeline purging device to continuously purge the oxygen pipeline for a first time, start the coal slurry pipeline purging device, so that the coal slurry pipeline purging device ...

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Abstract

The invention provides a method for controlling a gasification furnace to halt. The method comprises the following steps: closing an upstream oxygen stopping valve and a downstream oxygen stopping valve on a pipeline of the gasification furnace, opening a central oxygen valve by switching on power and closing a central oxygen nitrogen purging valve by cutting power off; continuously purging an oxygen pipeline by an oxygen pipeline purging device for a first time and then closing the oxygen pipeline purging device; continuously purging by a coal slurry pipeline purging device for a second time and then closing the coal slurry pipeline purging device; opening the central oxygen nitrogen purging valve by switching on power; continuously purging the oxygen pipeline by the oxygen pipeline purging device for a third time and then closing the downstream oxygen stopping valve and the central oxygen nitrogen purging valve and closing the central oxygen valve by cutting power off; opening a nitrogen annulus valve and the central oxygen nitrogen purging valve by switching on power, thereby purging nitrogen for the oxygen pipeline; and purging the oxygen in the oxygen pipeline and then closing the nitrogen annulus valve by cutting power off and closing the central oxygen nitrogen purging valve by cutting power off, thereby halting the gasification furnace and effectively removing the oxygen in the pipeline.

Description

technical field [0001] The invention relates to the technical field of coal gasification equipment control, in particular to a method for controlling the shutdown of a gasification furnace. Background technique [0002] Texaco coal gasification technology is a very mature coal gasification technology with high safety performance, but it still has its own safety hazards. Most of the explosion accidents in the coal gasification plant occurred at the furnace head of the gasification furnace, especially at the connection between the oxygen pipeline and the burner, and the part between the shut-off valve downstream of the oxygen and the gasification burner is the high-incidence area of ​​accidents. In the existing gasifier shutdown sequence control (referred to as sequential control) process, the nitrogen valve is only opened for a short period of time when the oxygen pipeline is purged with high-pressure nitrogen, and the central oxygen control valve is powered off after the sto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10J3/72
CPCC10J3/466C10J3/723C10J3/728C10J2300/093C10J2300/0959
Inventor 杨绍军陆冰崔守志
Owner CHINA SHENHUA ENERGY CO LTD
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