Boiler combustion efficiency online monitoring device

Abstract

The invention discloses a boiler combustion efficiency online monitoring device. The device comprises a shell (1); a flue gas channel (2) is arranged in the shell (1); an inlet section carbon dioxidedetector (4) is arranged on the inlet section of the flue gas channel (2); a heating device (5) is arranged on the flue gas channel (2); the heating device (5) can heat flue gas residual carbon in theflue gas channel (2) to the temperature above the carbon ignition point; and an outlet section carbon dioxide detector (7) is arranged on the flue gas channel (2) and located behind the heating device (5). The boiler combustion efficiency online monitoring device has the advantages that the quantity of residual carbon in boiler flue gas can be measured accurately in real time, the measurement stability is good, the maintenance amount is small, the precision is high, the boiler combustion state can further be controlled and optimized, and the power generation coal consumption is reduced.

Description

technical field [0001] The invention relates to an on-line monitoring device for boiler combustion efficiency. Background technique [0002] The combustion efficiency of the boiler can be assessed by detecting the carbon content of the fly ash of the boiler. By detecting the carbon content of the fly ash in real time, it will help to guide the operation to correctly adjust the air-to-coal ratio and improve the combustion control level of the boiler; reasonably control the carbon content of the fly ash. , which is conducive to reducing the cost of power generation and improving the economy of unit operation. With the continuous development of large-capacity and high-parameter power generation units in my country, online detection of carbon content in boiler fly ash is realized to control and optimize boiler combustion, reduce coal consumption for power generation, improve the ability to "bid on the Internet" and integrate fly ash. Leveraging capabilities has become increasing...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of measuring the carbon content of fly ash is the chemical weight loss on ignition method, which is an off-line laboratory analysis method. As a result, the measurement results cannot reflect the current boiler combustion conditions in a timely and accurate manner, and the guidance for boiler combustion control and combustion adjustment lacks real-time performance.

At present, the on-line boiler fly ash carbon content monitors used in power plants basically use microwave measurement technology, but the measurement of fly ash carbon content by microwave measurement technology is greatly affected by changes in coal types, and the measurement stability and accuracy Neither is ideal, it is difficult to meet the user's requirements for measurement accuracy and stability, and most of them require a large amount of maintenance

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