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Boiler pressure-bearing pipe leakage positioning method for planar four-element array power station

A technology of power plant boilers and plane four, which is applied in the directions of positioning, boiler working status indication, radio wave measurement system, etc., can solve the problem of spending a lot of manpower and time.

Inactive Publication Date: 2010-08-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the case of leakage hole diameter of 1-4mm, the maintenance task often requires a lot of manpower and time, and the major technical problem it faces is to solve the problem of precise location of the leakage source

Method used

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  • Boiler pressure-bearing pipe leakage positioning method for planar four-element array power station
  • Boiler pressure-bearing pipe leakage positioning method for planar four-element array power station
  • Boiler pressure-bearing pipe leakage positioning method for planar four-element array power station

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Experimental program
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Effect test

Embodiment 1

[0054] When the time delay estimation error is 1 μs, the adaptive Gauss mutation genetic algorithm is used, the population evolves through 16 generations, and the minimum fitness of the population is 26.1769, as Figure 5a As shown, the positioning result is (4.8805, 2.6297, 9).

Embodiment 2

[0056] When the time delay estimation error is 0.1μs, the adaptive Gauss mutation genetic algorithm is adopted, the population evolves through 157 generations, and the minimum fitness of the population is 0.1332, as Figure 5b As shown, the positioning result is (4.8693, 2.8716, 9.5692).

Embodiment 3

[0058] When the time delay estimation error is 0, the adaptive Gauss mutation genetic algorithm is adopted, the population evolves through 16 generations, and the minimum fitness of the population is 0.0071, as Figure 5c As shown, the positioning result is (5.007, 3.006, 10).

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Abstract

The invention discloses a boiler four-pipe leakage acoustic detection precision positioning system for a power station and belongs to the technical field of boiler pipeline leakage detection positioning for a thermal generator set. A planar four-element boiler pressure-bearing pipe leakage precision positioning microphone array and the arrangement in a hearth thereof are designed according to the structural characteristics of power station boilers. The time delay estimation is obtained through the maximized generalized likelihood cross-correlation, and by adopting a decimal floating-point coding self-adaptive Gaussian mutation algorithm, the determination of a precise position of the boiler pressure-bearing pipe leakage is realized. The boiler four-pipe leakage sound detection precision positioning system has the advantages of high precision and robustness.

Description

technical field [0001] The invention belongs to the technical field of boiler pressure pipe leakage monitoring in thermal power generation, and in particular relates to the precise location technology for pipeline leakage of boiler inner water wall, superheater, reheater and economizer heating surface of a thermal power generation unit. Background technique [0002] The leakage of the "four tubes" of thermal power boilers has always been a major problem that plagues the safe production of thermal power units. Early prediction of boiler tube bursts is carried out to detect leaks in time before they develop into destructive bursts and determine the location of the leak. It is of great significance for properly arranging shutdown, shortening maintenance time and reducing economic loss. [0003] At present, domestic and foreign (see patent "Acoustic Leak Detection System", US4960079, "on-line monitor for boiler pressure tube leakage", CN2253829) furnace tube leakage detection de...

Claims

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Application Information

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IPC IPC(8): G01S5/18G01M3/24F22B37/38
Inventor 安连锁王鹏姜根山沈国清
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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