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Device and method for measuring air leakage rate of power station boiler air pre-heater under medium and low loads

An air preheater and low-load technology, which can solve the problems of increasing test errors by measuring the rate of increase and deceleration of the fluid, by detecting the appearance of the fluid at the leak point, and using the liquid/vacuum degree for liquid tightness measurement.

Active Publication Date: 2020-03-06
STATE GRID HEBEI ELECTRIC POWER RES INST +1
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Problems solved by technology

Experimenters are under time pressure to reduce the measurement time of data, which often increases the experimental error

Method used

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  • Device and method for measuring air leakage rate of power station boiler air pre-heater under medium and low loads
  • Device and method for measuring air leakage rate of power station boiler air pre-heater under medium and low loads
  • Device and method for measuring air leakage rate of power station boiler air pre-heater under medium and low loads

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Embodiment Construction

[0110] In order to make the objectives, technical solutions, and advantages of the present invention clearer and more comprehensible, the following further describes the present invention in detail in conjunction with embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0111] 1. Establish a testing platform.

[0112] The detection platform includes a first flue gas oxygen content sensor PO1 installed at the inlet of the air preheater, a second flue gas oxygen content sensor PO2 installed at the outlet of the air preheater, and carbon content in fly ash installed at the outlet of the air preheater The output terminals of the first flue gas oxygen content sensor PO1, the second flue gas oxygen content sensor PO2, and the fly ash carbon content PWas are respectively connected to the data collection unit The corresponding input port of the data acquisition unit; the ...

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Abstract

The invention relates to a device for measuring the air leakage rate of an air pre-heater of a power station boiler under medium and low loads. The device comprises a first flue gas oxygen content sensor mounted at an inlet of the air pre-heater, a second flue gas oxygen content sensor mounted at an outlet of the air pre-heater, a fly ash carbon content sensor mounted at the outlet of the air pre-heater, a data acquisition unit and a computer. The invention further comprises a method for carrying out an air pre-heater air leakage test under medium and low loads by utilizing the device to acquire the air leakage rate of the air pre-heater under a rated load or BMCR working condition through conversion. According to the invention, the method is simple; the field coordination workload and theexperiment cost of air pre-heater air leakage are reduced; and the result is accurate.

Description

Technical field [0001] The invention belongs to the technical field of coal-fired boiler energy saving, and specifically relates to a device and method for measuring the air preheater air leakage rate of a power station boiler under medium and low loads. Background technique [0002] Air preheater (referred to as air preheater, the same below) is one of the most important auxiliary equipment in power plant boilers. The air preheater leakage rate is an important parameter that characterizes the operating characteristics of the air preheater, and the air preheater leakage test is an important test item for power station boilers. When the air preheater leaks too much, on the one hand, the heat exchange capacity of the air preheater will decrease, and in severe cases, the temperature of the hot air entering the boiler will decrease, and the boiler efficiency will decrease, thereby reducing the economy of the unit; on the other hand, it will increase the power consumption of the fan. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26G01M3/20
CPCG01M3/20G01M3/26
Inventor 贾永会闫慧博杜建桥马登卿张勇胜刘文献张万德
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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