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Operation method for controlling ash clogging of IGCC gasifier

An operation method and technology of gasifier, applied in gasification process, production of combustible gas, granular/powder fuel gasification, etc., can solve the problem of flow surface of process pipeline, influence heat exchange of waste boiler of gasifier, and interlock alarm It solves problems such as outage of IGCC units, and achieves the effect of ensuring stable operation and solving ash blocking in gasifiers.

Pending Publication Date: 2021-06-15
HUANENG TIANJIN COAL GASIFICATION POWER CO LTD
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Problems solved by technology

When ash deposits and scaling occurs, it will directly affect the heat exchange of the waste boiler of the gasifier, the temperature rise of the waste boiler outlet and the subsequent process, and in severe cases, the interlock alarm value will be triggered and the IGCC unit will be shut down
Not only will it affect the normal and stable operation of the IGCC, but the fouling of the fouling will cause the flow surface of the process pipeline to

Method used

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  • Operation method for controlling ash clogging of IGCC gasifier

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of the embodiments of the present disclosure, but not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

[0021] In addition, the term "and / or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which may mean: A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character " / " in this article ...

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Abstract

The invention provides an operation method for controlling ash clogging of an IGCC gasifier. The method comprises the following steps: rapping accumulated ash: observing pressure difference change on a control unit, and starting a knocker to rap the accumulated ash on the gasifier; reducing the temperature of the chilling gas: reducing the pressure value of secondary medium-pressure steam which is produced by the low-pressure waste heat boiler and injected into the washing unit on the control unit; reducing the temperature of the furnace top in two modes, wherein one mode is that the input amount of steam injected into the gasifier by a section of coal burner is adjusted on the control unit by observing the change of the melting point of coal ash entering the furnace, and the other mode is characterized in that the gas amount of high-pressure nitrogen injected into an outlet pipeline of a chilling gas compressor is controlled on the control unit; controlling the air volume: adjusting the running power of the chilling gas compressor to be not less than 1100 KW; and controlling the furnace temperature: reducing the oxygen-coal ratio by observing the furnace temperature on the control unit so as to reduce the reaction temperature of the hearth.

Description

technical field [0001] Embodiments of the present invention generally relate to the technical field of coal chemical equipment, and more specifically, relate to an operation method for controlling ash blocking of an IGCC gasifier. Background technique [0002] The temperature of the syngas produced by the IGCC gasifier furnace is about 1400-1500°C, and it needs to be cooled. Physical cooling and chemical cooling are usually used, and the temperature of the syngas after cooling is lower than the ash melting point of coal powder. At this time, although the fly ash entrained in the syngas is solidified, it has not completely lost its viscosity, and will adhere to the inner wall of the gasifier in the form of scale. When ash deposits and scaling occurs, it will directly affect the heat exchange of the waste boiler of the gasifier, the temperature rise of the waste boiler outlet and the subsequent process, and in severe cases, the interlock alarm value will be triggered and the I...

Claims

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Application Information

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IPC IPC(8): C10J3/46C10J3/48C10J3/72C10J3/86
CPCC10J3/46C10J3/48C10J3/72C10J3/723C10J3/86C10J2300/093Y02P20/129Y02E20/18
Inventor 吴平秦建明祁海鹏艾云涛王相平李志强文子强孙国平王超许冬亮贾东升付彬张克李思琪段晋伟王瑞超
Owner HUANENG TIANJIN COAL GASIFICATION POWER CO LTD
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