Device and method for measuring air leakage rate of power plant boiler air preheater under medium and low load

An air preheater, low load technology, applied in the direction of measuring the acceleration and deceleration rate of the fluid, by detecting the appearance of the fluid at the leak point, and using the liquid/vacuum degree for liquid tightness measurement, which can solve problems such as increasing the test error. , to achieve the effect of extending the load time period, the calculation method is simple, and the coordination workload is reduced.

Active Publication Date: 2021-05-04
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

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  • Device and method for measuring air leakage rate of power plant boiler air preheater under medium and low load
  • Device and method for measuring air leakage rate of power plant boiler air preheater under medium and low load
  • Device and method for measuring air leakage rate of power plant boiler air preheater under medium and low load

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Embodiment Construction

[0109] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0110] 1. Build a testing platform.

[0111] The detection platform includes the first flue gas oxygen content sensor PO1 installed at the air preheater inlet, the second flue gas oxygen content sensor PO2 installed at the air preheater outlet, and the carbon-containing fly ash installed at the air preheater outlet Quantity sensor PWas, data acquisition unit and computer with Visual Basic software installed; the output terminals of the first flue gas oxygen content sensor PO1, the second flue gas oxygen content sensor PO2, and fly ash carbon content PWas are respectively connected to the data acquisition unit the correspon...

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Abstract

The invention relates to a device for measuring the air leakage rate of an air preheater of a power plant boiler under medium and low loads, which includes a first flue gas oxygen content sensor installed at the inlet of the air preheater, a second flue gas sensor installed at the outlet of the air preheater Oxygen content sensor, fly ash carbon content sensor installed at the air preheater outlet, data acquisition unit and computer. The present invention also includes the method of using the above-mentioned device to carry out the air preheater air leakage test at medium and low loads, and converting to obtain the air preheater air leakage rate under the rated load or BMCR working conditions. The method of the present invention is simple and reduces the on-site coordination of air preheater air leakage The workload and experiment cost and the result is accurate.

Description

technical field [0001] The invention belongs to the technical field of energy saving of coal-fired boilers, and in particular relates to a device and method for measuring the air leakage rate of an air preheater 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 machines in power plant boilers. Air preheater air leakage rate is an important parameter to characterize the operation characteristics of air preheater, and air preheater air leakage test is an important test item for power plant boilers. When the air leakage of the air preheater is too large, on the one hand, it will cause the heat exchange capacity of the air preheater to decrease. When the design output of the fan is insufficient, it may even cause the power plant boiler to be forced to run at reduced load. Through the air preheater air leakage test, we can understand the operatin...

Claims

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Application Information

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Patent Type & Authority Patents(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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