Power station boiler abnormal working condition detection method and system

A technology for abnormal working conditions, power station boilers, applied in measurement devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., can solve the problems of uneven distribution, unplanned shutdown, uneven flow velocity distribution, etc. degree, accurate detection and determination of the effect

Pending Publication Date: 2022-05-17
HUANENG WEIHAI POWER GENERATION CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When designing power plant boilers, the flue flow area is designed based on a fixed amount of flue gas volume, but during peak shaving, the flue gas volume in the flue gas duct of the boiler unit deviates seriously from the design value
And under the influence of flue dust accumulation, the flue gas flows unevenly on the upper and lower sides of the flue cross section; There is uneven distribution of flow velocity in both directions, which will also affect the unevenness of ash accumulation in the flue
Although there is a soot blower in the flue that can regularly purge the soot deposits, it is impossible for the soot blower to pur

Method used

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  • Power station boiler abnormal working condition detection method and system
  • Power station boiler abnormal working condition detection method and system
  • Power station boiler abnormal working condition detection method and system

Examples

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Embodiment 1

[0073] Such as figure 1 As shown, this embodiment provides a method for detecting abnormal working conditions of a power plant boiler, the method comprising:

[0074] Step 100, obtaining the smoke flow velocity at different positions on the same cross section; the cross section is the cross section of the target flue to be detected; the smoke flow velocity is determined by the flow velocity detection component arranged on the target flue of. Specifically, the flow velocity detection component is a high-temperature wind velocity sensor, which uses a Pitot tube to simultaneously measure the dynamic pressure and static pressure of the flue gas, and then calculate the flow velocity of the flue gas. The stainless steel pitot tube of the pitot tube wind speed sensor has a temperature resistance of 1000°C, and is suitable for use in the horizontal flue of the boiler and all flue environments at the rear of the boiler.

[0075] In a specific embodiment, before the final stage reheat...

Embodiment 2

[0108] Such as Figure 4 As shown, this embodiment provides a system for detecting abnormal working conditions of a power plant boiler, and the system includes:

[0109] The flow velocity acquisition module 101 is used to acquire the smoke flow velocity at different positions on the same cross section; the cross section is the cross section of the target flue to be detected; the smoke flow velocity is set on the target flue determined by the flow rate detection component.

[0110] The flue gas data calculation module 201 is used to calculate the flue gas data of the calibrated flue flow area according to the calibrated flue gas flow rate; the flue gas data includes the flue gas flow rate, ash deposition risk value, wind speed deviation value and wear value; The calibrated flue flow rate is any flue flow rate; the cross-section includes a plurality of flue flow areas; the calibrated flue flow area is any flue flow area, and the calibrated flue flow The area is the flue gas pa...

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Abstract

The invention relates to a power station boiler abnormal working condition detection method and system, and relates to the technical field of boiler detection, and the method comprises the steps: obtaining the flue gas flow velocity at different positions on the same cross section; the cross section is the cross section of a target flue to be detected; the flue gas flow velocity is determined by a flow velocity detection component arranged on the target flue; calculating flue gas data of the calibrated flue through-flow area according to the calibrated flue gas flow velocity; the flue gas data comprises flue gas flow, an ash deposition risk value, a wind speed deviation value and a wear value; the cross section comprises a plurality of flue through-flow areas; judging whether the flue gas data of the calibrated flue through-flow area meet preset conditions or not; and if the flue gas data of the calibrated flue through-flow area does not meet the preset condition, it is determined that the working condition of the boiler where the target flue is located is abnormal. The detection precision of the abnormal working condition of the power station boiler is improved.

Description

technical field [0001] The invention relates to the technical field of boiler detection, in particular to a method and system for detecting abnormal working conditions of power plant boilers. Background technique [0002] At present, the rapid development of my country's new energy power generation industry has brought about the phenomenon of coal power overcapacity and promoted the flexibility transformation of coal power. It has become the norm for thermal power units, especially large coal-fired power units, to continue to operate at low load or deep peak regulation. Among them, the peak shaving process is the process of changing the thermal physical characteristics and thermal stress distribution inside the boiler. [0003] When designing power plant boilers, the flue flow area is designed based on a fixed amount of flue gas volume, but during the peak shaving period, the flue gas volume in the flue gas volume of the boiler unit deviates seriously from the design value....

Claims

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Application Information

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IPC IPC(8): G01D21/02G01P5/00
CPCG01D21/02G01P5/00
Inventor 张华东于信波赵峰李青杨春王少君谭常荣李振张敬邵帅佟艳亮
Owner HUANENG WEIHAI POWER GENERATION CO LTD
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