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Circulating fluidized bed boiler operation optimizing method based on consumption difference analysis

A circulating fluidized bed, optimized operation technology, applied in the direction of instrumentation, adaptive control, control/regulation system, etc., can solve the problems of large furnace temperature fluctuations, low combustion efficiency, high carbon content in fly ash, etc., to improve boiler efficiency Effect

Active Publication Date: 2014-12-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although fluidized bed combustion can greatly alleviate the pollution problems caused by the burning of inferior coal in power plants, in the process of developing circulating fluidized bed boilers to large capacity, high parameters, and high automation, there are still problems with low combustion efficiency and low combustion efficiency. Furnace temperature fluctuations, heating surface wear, high carbon content in fly ash, etc.

Method used

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  • Circulating fluidized bed boiler operation optimizing method based on consumption difference analysis
  • Circulating fluidized bed boiler operation optimizing method based on consumption difference analysis
  • Circulating fluidized bed boiler operation optimizing method based on consumption difference analysis

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Embodiment 1

[0046] The technical scheme that the present invention solves technical problem comprises the following steps:

[0047] 1. The creation of an expert system

[0048] Basic parameter library: including structural parameters, design operation parameters and nameplate parameters of each equipment of circulating fluidized bed;

[0049] Fact library: including the fact that the operating values ​​of the measurable parameters of the boiler combustion system, flue gas system and auxiliary system are higher or lower than the reference value;

[0050] Rule base: Including the rules of boiler efficiency reduction caused by different operating facts of the boiler system, that is, the form of the rule is [IF(), THEN()], and the premise of the rule is the fact set that different combinations of boiler system parameters deviate from the reference value ;

[0051] Reasoning engine: reasoning based on the forward reasoning strategy;

[0052] Interpretation module: output the matching [fact]...

Embodiment 2

[0068] This embodiment describes the present invention in more detail in conjunction with the energy efficiency optimization of two circulating fluidized bed boiler systems in a certain power plant.

[0069] 1. Establishment of expert system knowledge base

[0070] The circulating fluidized bed boiler optimization operation system is a typical plant level optimization system of circulating fluidized bed power plant based on expert system. The establishment of expert system knowledge base includes:

[0071] 1) Establishment of equipment parameter library

[0072] The equipment parameter library includes the structure and design parameters of the main equipment and auxiliary equipment of the boiler system of the power plant; it includes the operation history data from October 2013 to March 2014 after the overhaul of the unit, which is imported from the SIS system.

[0073] 2) Establishment of fact database

[0074] The fact base contains all the facts needed and generated whe...

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Abstract

The invention provides a circulating fluidized bed boiler operation optimizing method based on consumption difference analysis. According to the method, an expert system that is built based on a circulating fluidized bed boiler system can achieve simulation on energy efficiency analysis of human experts, and perform inference on boiler operation and guiding optimal operation by using expert knowledge in the industry; a critical parameter consumption difference analysis model is built, so that consumption difference computation of real-time operation critical parameters of the boiler system can be achieved, and influence of change of various parameter on boiler efficiency can be obtained; an intelligent algorithm of an expert system is used for obtaining a boiler operation optimizing strategy under a specific load working condition, and thereby boiler efficiency is improved; various losses and boiler efficiencies of the boiler system before and behind optimization are computed and compared to intuitively reflect optimizing effect of the boiler system; the platform of a knowledge base is opened that system operators correct, add or remove facts, rules and corresponding decisions and the like in real time, and thereby sensitivity and precision rate of system diagnosis are improved.

Description

technical field [0001] The invention relates to the technical field of combustion of a circulating fluidized bed boiler, in particular to a method for optimizing the operation of a circulating fluidized bed boiler based on differential consumption analysis. Background technique [0002] Circulating fluidized bed boiler (CFB) combustion technology is a new type of high-efficiency, low-pollution and clean coal-fired technology. Applications. Although fluidized bed combustion can greatly alleviate the pollution problems caused by the burning of inferior coal in power plants, in the process of developing circulating fluidized bed boilers to large capacity, high parameters, and high automation, there are still problems with low combustion efficiency and low combustion efficiency. Furnace temperature fluctuates greatly, the heating surface is worn, and the carbon content of fly ash is high. Circulating fluidized bed boiler is a multi-parameter, nonlinear, time-varying and multi-...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 马晓茜李双双余昭胜林有胜
Owner SOUTH CHINA UNIV OF TECH
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