Flue gas oxygen content prediction method and device of gas-fired boiler

Abstract

The invention is suitable for the field of gas distributed energy, and provides a method and device for predicting the flue gas oxygen content of a gas boiler, and the method comprises the steps: obtaining a flue gas oxygen content prediction model request of a target gas boiler in a to-be-monitored energy station and the operation data of the target gas boiler, the flue gas oxygen content prediction model request carries a gas boiler identifier; determining a target combined energy station according to the gas boiler identifier; according to the gas boiler operation data corresponding to each target combined energy station, constructing a combined flue gas oxygen content prediction model; and generating the flue gas oxygen content of the target gas-fired boiler according to the combined flue gas oxygen content prediction model and the operation data of the target gas-fired boiler. According to the embodiment, the exhaust smoke oxygen content can be measured without a sensor, the exhaust smoke oxygen content can be monitored in real time, maintenance is convenient, measurement errors are reduced, meanwhile, the combined exhaust smoke oxygen content measurement model depends on real data and is not prone to being affected by the external environment, and the exhaust smoke oxygen content can be accurately determined.

Description

technical field [0001] The invention belongs to the field of gas-fired distributed energy, and in particular relates to a method and device for predicting the oxygen content of flue gas of a gas-fired boiler. Background technique [0002] The oxygen content of flue gas refers to the content in the flue gas discharged after the fuel is burned. It is an important indicator of the combustion of gas-fired boilers. Factors such as working conditions and equipment sealing conditions. In the actual operation of the gas boiler, in order to allow the fuel to be fully burned, the actual air supply is much larger than the theoretical air supply. The amount of air supplied is often referred to as excess air. The excess air factor is the ratio of the actual supply air volume to the theoretical supply air volume. If the oxygen content of the flue gas is too low, that is, the smaller the excess air coefficient, the oxygen supply to the gas boiler will be insufficient, the fuel cannot be...

AI Technical Summary

Problems solved by technology

[0004] However, this kind of sensor has many disadvantages such as high cost, large measurement lag, difficult maintenance, large measurement error, and short life. It is not suitable for long-term use in distributed energy scenarios where small and medium gas boilers are the mainstay.

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