Multivariable cooperative control method for double-hearth circulating fluidized bed unit

A circulating fluidized bed and collaborative control technology, which is applied to the control of bed temperature and bed pressure, and the field of circulating fluidized bed boiler load, can solve the problems of difficulty in controlling the balanced combustion of double furnaces and poor stability.

Active Publication Date: 2015-01-21
SOUTHEAST UNIV +1
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Problems solved by technology

[0009] Technical problem to be solved: Aiming at the deficiencies of the prior art, the present invention proposes a multi-variable cooperative control method of a double furnace circulating fluidized bed unit, which is used to solve the problem of bed temperature, bed pressure and Poor stability of load coordination control and difficult technical problems of balanced combustion control of double furnaces

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  • Multivariable cooperative control method for double-hearth circulating fluidized bed unit
  • Multivariable cooperative control method for double-hearth circulating fluidized bed unit
  • Multivariable cooperative control method for double-hearth circulating fluidized bed unit

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Embodiment Construction

[0126] The present invention will be further described below in conjunction with the accompanying drawings.

[0127] exist figure 1 In the output Y of the system, there are a total of 7 output quantities, which are the real power N E , Front pressure P T , oxygen content O, left hearth temperature T LF , right hearth temperature T RF , left hearth pressure P LF and right hearth pressure P RF , the prefix r indicates their setting value; the input U of the system has a total of 9 input quantities, which are the primary air volume of the left furnace F 1,LF , Left furnace secondary air volume F 2,LF , Left furnace coal supply B LF , The opening degree of the return valve of the left furnace μ v,LF , The opening degree of the main steam control valve μ T , Primary air volume of the right furnace F 1,RF , The secondary air volume of the right furnace F 2,RF , Right furnace coal supply B RF and the opening of the right furnace return valve μ v,RF . In this way, the i...

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Abstract

The invention discloses a multivariable cooperative control method for a double-hearth circulating fluidized bed unit, belongs to a multivariable system for constructing a circulating fluidized bedboiler and a turbo-set, and adopts a multivariable constraint DMC algorithm based on tracking error gradient. The adopted algorithm makes improvement on the traditional DMC algorithm, specifically, the tracking error gradient is introduced in an objective function, so that the tracking effect for the set value is improved, and constraint is attached to input and output, so that the controlled variable of a solution is within the physical scope. According to the invention, as the bed temperature and the bed pressure of hearths on left and right sides are considered simultaneously, during variable working condition regulation, the load tracking capacity is guaranteed, and the bed temperature and bed pressure of the two hearths are balanced and stable, and balanced combustion is realized.

Description

technical field [0001] The invention belongs to the control field of circulating fluidized bed power plants, and relates to a control method for circulating fluidized bed boiler load, bed temperature and bed pressure. Background technique [0002] Circulating Fluidized Bed (CFB) boiler combustion technology, as a clean coal-fired technology with high efficiency, low pollution, low-quality coal such as coal slime and gangue, and wide adaptability, has received more and more attention in the world, and is being Become the main force of coal-fired technology. The national "Twelfth Five-Year Plan" clearly stated that "increase energy conservation efforts; promote the utilization of industrial waste such as fly ash, coal gangue, metallurgical and chemical waste residues, and tailings", which provides technical research and industrialization development for large circulating fluidized bed boilers The opportunity brought by the current 300MW circulating fluidized bed boiler has gr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/28
CPCF23C10/28F23C2206/00
Inventor 郝勇生赵明焦健赛俊聪李益国梁俊宇陈晓平邱亚林胥建群耿向瑾向文国沈发荣
Owner SOUTHEAST UNIV
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