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A Method for Optimal Operation of Circulating Fluidized Bed Boiler Based on Loss Analysis

A circulating fluidized bed and optimized operation technology, applied in the direction of instruments, adaptive control, control/regulation systems, etc., can solve the problems of large furnace temperature fluctuations, high carbon content in fly ash, and wear of heating surfaces, etc., to improve the efficiency of boilers efficiency effect

Active Publication Date: 2017-01-04
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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  • A Method for Optimal Operation of Circulating Fluidized Bed Boiler Based on Loss Analysis
  • A Method for Optimal Operation of Circulating Fluidized Bed Boiler Based on Loss Analysis
  • A Method for Optimal Operation of Circulating Fluidized Bed Boiler Based on Loss 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 optimization method based on consumption difference analysis. The method is based on the expert system model established by the circulating fluidized bed boiler system, which can simulate the energy efficiency analysis thinking of human experts, and use the experience and knowledge of experts in the industry to Boiler operation reasoning and guidance to optimize operation; establishment of circulating fluidized bed boiler system important parameter consumption difference analysis model, which can realize the calculation of consumption difference of important parameters of boiler system real-time operation, and obtain the influence of various parameter changes on boiler efficiency; adopt expert The intelligent algorithm of the system obtains the boiler operation optimization decision under specific load conditions to improve boiler efficiency; and compares the losses of the boiler system before and after optimization and the calculation and comparison of boiler efficiency to intuitively reflect the optimization effect of the boiler system; the open knowledge base platform is provided by the system Operators can modify and add or subtract facts, rules, and corresponding decisions in real time to improve the sensitivity and accuracy of system diagnosis.

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