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Automatic optimization control method of boiler air-supply volume

A control method and automatic optimization technology, applied in the combustion method, adjusting the air supply, controlling the combustion, etc., can solve the problems of high cost and high maintenance cost

Inactive Publication Date: 2007-11-28
周振华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not require thermal testing of the boiler in order to find the optimal flue gas oxygen content (this is a complicated and heavy work), and does not need to install an online flue gas oxygen meter (this instrument is expensive and has high maintenance costs. )

Method used

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  • Automatic optimization control method of boiler air-supply volume
  • Automatic optimization control method of boiler air-supply volume
  • Automatic optimization control method of boiler air-supply volume

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Embodiment

[0038] In four 35T / h chain furnaces of Thermal Power Division of Shunde Jinfang Group, Foshan City, Guangdong Province, adopt the method of the present invention to carry out the automatic control of air supply volume, set air-to-coal ratio=0.6, sampling period=30 seconds, Optimization step length = 0.5; in use, the thermal efficiency of the boiler can be obtained through the measurement of the amount of coal and the flow of superheated steam. Compared with the manual control of the boiler worker with more than 10 years of operating experience, the thermal efficiency has increased by at least 2%, and the economy The benefits are very obvious.

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Abstract

The invention discloses an automatic optimal control method for supplied air volume of boiler. It is provided with stable running, high automation and improved heat efficiency of boiler. Technical points are that by measuring running parameter of boiler and fuel consumption volume in time, heat efficiency of boiler is calculated; these data are sent to the digital fuzzy regulator to analyze; supplied air volume is adjusted correctly so that it approaches the optimal supplied air volume in actual working condition; when the ratio of variable quantity of supplied air volume and variable quantity of heat efficiency is larger than zero, supplied air volume is adjusted on the direction continuously; when the ratio is smaller than zero, supplied air volume is adjusted on the opposite direction; when the ratio is equal with zero, corresponding supplied air volume is the optimal value. The invention is applied in optimal control for supplied air volume of coal-fired boiler.

Description

technical field [0001] The invention relates to a boiler control technology, in particular to an automatic optimal control method for boiler air supply volume. Background technique [0002] As we all know, when the boiler performs combustion control, the air supply volume should be adjusted in time to match the fuel consumption of the boiler, so as to ensure that the thermal efficiency of the boiler is always maintained at the highest value, and the corresponding air supply volume is the optimal air supply volume. The excess air factor is the best excess air factor. The well-known combustion automatic adjustment method is to find out the optimal excess air coefficient of the boiler and the corresponding optimal flue gas oxygen content through the boiler thermal experiment, and then use the online flue gas oxygen meter to continuously measure the flue gas oxygen content, and then The oxygen content of flue gas is automatically adjusted by the combustion automatic adjustment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N3/00F23N5/00
Inventor 周振华陈雁
Owner 周振华
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