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Control method and system for dual fluidized bed coal gasification process load

A dual fluidized bed, process load technology, applied in the field of coal gasification, can solve the problem of unsatisfactory load adjustment and control effect of dual fluidized bed coal gasification process

Active Publication Date: 2015-11-18
BEIJING LEIHAO ENVIRONMENTAL PROTECTION ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the load adjustment of the dual fluidized bed coal gasification process is often determined by the gas demand of downstream production, and the change of gas demand directly affects the adjustment of process operation parameters and gas quality; and when the working conditions change, the gasification coal consumption, gas The relationship between chemical agent dosage and gas production will change linearly and time-varying, while traditional PID control (proportional, integral, differential control) is suitable for linear constant systems, often used in fixed-bed gas generators, for double-fluidized-bed gas Chemical process load adjustment control effect is not ideal

Method used

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  • Control method and system for dual fluidized bed coal gasification process load
  • Control method and system for dual fluidized bed coal gasification process load
  • Control method and system for dual fluidized bed coal gasification process load

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Embodiment 1

[0122] figure 1 It is a flow chart of a load control method for a dual fluidized bed coal gasification process provided by Embodiment 1 of the present invention. Such as figure 1 As shown, it mainly includes the following steps:

[0123] Step 11, measuring the coal feed rate, air flow rate and steam flow rate of the double fluidized bed gas generator.

[0124] Exemplarily, an orifice-type differential pressure flowmeter can be used for steam flow, and thermal flowmeters can be used for other flows.

[0125] Step 12. According to the measured data, it is judged whether the double fluidized bed gas generator is in normal operation state.

[0126] The specific steps are as follows: Calculate the real-time load Load: Load=F(coal) / F(standard)×100%; where, F(coal) is the measured coal intake, and F(standard) is the designed full load (i.e. the design full load coal intake);

[0127] According to the calculated real-time load Load and combined with the preset judgment threshold,...

Embodiment 2

[0186] The embodiment of the present invention provides a dual fluidized bed coal gasification process load control system, which mainly includes:

[0187] The data measurement module is used to measure the output gas volume, coal intake volume, air flow rate and steam flow rate of the double fluidized bed gas generator;

[0188] An operating state judging module is used to judge whether the double fluidized bed gas generator is in a normal operating state according to the measured data;

[0189] The control parameter calculation module is used to adopt the preset feed control algorithm and according to the current load state of the dual fluidized bed gas generator, as well as the air flow and steam Calculate the corresponding coal intake, air flow and steam flow control parameters according to the change of flow rate;

[0190] The feed adjustment module is used to adjust the feed of the double fluidized bed gas generator according to the calculated coal feed, air flow and st...

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Abstract

The invention discloses a control method and system for dual fluidized bed coal gasification process load. The dual fluidized bed coal gasification process load can be controlled according to adjusting characteristics of the dual fluidized bed coal gasification process load, so that the influence of a conventional control method on gasifier process fluctuations under different working conditions is avoided, the adaptability of a coal gasification device to the working conditions is improved, the impact resistance of the process during process load adjustment is improved, and the service life of equipment is prolonged.

Description

technical field [0001] The invention relates to the field of coal gasification, in particular to a method and system for controlling the load of a double fluidized bed coal gasification process. Background technique [0002] At present, thermal processing workshops in machinery, metallurgy, building materials, light industry, chemical industry, refractories and other industries have widely used fuel gas as one of the main sources of fuel gas. As a fuel gas production device, the level of the gas generator can directly reflect the overall level of the above-mentioned industries. Compared with the traditional two-stage fixed bed gas generator device, the double fluidized bed gas generator device has greatly improved in terms of technology, safety, and environmental protection. There is no risk of deflagration and explosion safety hazards caused by heat exchange, no phenol water, no tar and so on. [0003] However, the load adjustment of the dual fluidized bed coal gasificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/54G05B13/02
Inventor 雷晓平毛丽康侯傲霍锡臣冯娜
Owner BEIJING LEIHAO ENVIRONMENTAL PROTECTION ENERGY TECH