Split burning fame detecting system

Abstract

A kind of fission type combustion flame detecting system which include only photo detector, fire examine probe and fire examine amplifier that connect to pretreating open circuit of photo detector output terminal. Fire examine amplifier includes one flame analog signal processing circuit, A / D transducer, digital signal processing circuit, display unit, D / A transducer, on-off input and output circuit, and serial communication circuit; the input end of flame analog signal processing circuit attach with pretreating circuit output port of fire examine probe; the input end of A / D transducer attach with flame analog signal processing open circuit's output port; the digital signal processing circuit(DSP) attach with output port of A / D transducer; The display unit, D / A transducer, on-off input and output circuit, and serial communication circuit respectively attach with digital signal processing circuit; the DSP circuit includes microprocessor that has interior signal processing system. The signal processing system includes signal acquisition module, digital filter module and analysis process module. Digital signal processing circuit(DSP)output switching value signal about with or without flame, and with or without trouble, and combustion flame's frequency and its corresponding power spectrum.

Description

technical field [0001] The invention relates to a combustion flame detection system, in particular to a split type combustion flame signal detection system, which is especially suitable for detection and analysis of combustion flame conditions in boilers of thermal power plants or petrochemical enterprises. Background technique [0002] Usually, the probe for detecting combustion flame is an integrated flame detection probe, that is, all relevant circuits are built in a probe housing. The circuit of this kind of integrated flame detection probe is relatively complicated, and the power consumption is high, and the upper limit of the operating temperature of most integrated circuits is 85°C, which makes the upper limit of the working environment temperature of the flame detector not exceed 65°C; The detection probe uses a photosensitive resistor as a photoelectric sensor. The temperature characteristic of the photosensitive resistor is very poor, and its performance drops shar...

AI Technical Summary

Problems solved by technology

Such a measurement ignores the frequency characteristics of the flame signal, making it difficult to accurately detect the flame condition

Especially in a large-scale boiler control system with multiple burners, since there are multiple layers of flames burning and multiple combustion points in the same layer, it is difficult to effectively distinguish the main flame and the background flame of the burner by traditional flame detection calculations , which can easily lead to misjudgment of the flame and lead to misoperation of the control

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