Control method for stable operation of gasification device after shutdown of partial coal pipelines

A gasification device and a stable operation technology, applied in the gasification of granular/powdered fuels, the manufacture of combustible gases, the petroleum industry, etc., can solve the fluctuations and fluctuations of the gasification system, reduce the risk of water wall lining and gasification burner ablation and other problems, to achieve the effect of simple operation and good resistance to system fluctuations

Active Publication Date: 2019-10-01
SINOPEC YANGZI PETROCHEM +1
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Problems solved by technology

[0004] The invention provides a control method for the stable operation of a gasification device after a part of the coal line jumps, which solves the problem of fluctuations in the gasification system caused by a part of the coal line jumping, effectively avoids large fluctuations in the pressure of the gasification device, and reduces the pressure of the water wall. Risk of ablation of lining and gasification burners

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  • Control method for stable operation of gasification device after shutdown of partial coal pipelines

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Embodiment 1

[0042] A coal gasification unit with a daily processing capacity of 1,000 tons. There are 2 pulverized coal pipelines with a gasification pressure of 4.0MPag, and pulverized coal is used as feed. A gasification burner is installed on the top of the gasifier, two pulverized coal pipelines and two corresponding oxygen In the pipeline, when a single pulverized coal pipeline jumps, the gasification unit operates stably and controllably. The main steps are as follows:

[0043] (1) Switch the system pressure regulating valve to manual control, the valve opening is 20%, and the gasification system pressure is reduced to ~3.8MPag;

[0044] (2) The skipped coal line corresponds to the oxygen cutoff, and the skipped coal line nitrogen (or CO 2 ) Purge;

[0045] (3) Increase the pulverized coal and oxygen load of the operating coal line to protect the gasifier burner;

[0046] (4) After the fault processing of the skipping coal line is completed, based on the configuration of the feeding tank, w...

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Abstract

The invention discloses a control method for stable operation of a gasification device after shutdown of partial coal pipelines. The gasification device comprises a charging bucket, a weighing tank, agasification burner, an oxygen supply device, a purging device and a gasification furnace; after the shutdown of the partial pulverized coal pipelines, the control method realizes the stable controlof the gasification device by matching and maintaining a stable material flow between the pulverized coal pipelines based on pulverized coal conveying pipeline configuration. The control method bettersolves the problem that the gasification device fluctuates after the shutdown of the partial coal pipelines since the pulverized coal pipelines have failure, and provides a guarantee for the safe long-time stable operation of the gasification device.

Description

Technical field [0001] The invention relates to a control method for the stable operation of a gasification device after a part of the coal line jumps, and belongs to the field of stable operation control of the gasification device. Background technique [0002] Coal gasification is one of the main ways of clean and efficient conversion and utilization of coal. Among them, the fluidized bed pressurized gasification technology of pulverized coal gas is the mainstream development direction of coal gasification technology due to its strong applicability of coal types and advanced gasification indicators. At present, in order to achieve large-scale gasification requirements, multiple pulverized coal pipelines are generally used. Because pulverized coal pneumatic transportation is susceptible to factors such as impurities in pulverized coal and valve failures, the coal line jumps. If the control plan is not adjusted in time, the This will cause large fluctuations in the pressure of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/50C10J3/72
CPCC10J3/506C10J3/723
Inventor 丁家海王云亮王陵杨玉辉徐红波丁亚伟
Owner SINOPEC YANGZI PETROCHEM
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