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Research on acoustic source positioning method for boilers
HOT
Capacity:1-20t/h
Rated thermal efficiency: 100-104%
Fixed working pressure: ≤1.6MPa
Applicable fuel:natural gas etc.
HOT
Capacity:0.7-14MW
Rated thermal efficiency:96-98%
Fixed working pressure:≤1.25MPa
Applicable fuel:Natural gas, light oil, etc.
HOT
Capacity:0.7-2.8Mw
Rated thermal efficiency: 97.2-106%
Fixed working pressure:0.1MPa
Applicable fuel:Natural gas, etc.
HOT
Capacity:2.8-7.0Mw
Rated thermal efficiency:≥105.5%
Fixed working pressure:-0.02MPa
Applicable fuel:Natural gas, etc.
HOT
Capacity:99Kw
Rated thermal efficiency:97.2-104.4%
Fixed working pressure:1.0MPa
Applicable fuel:Natural gas, etc.
HOT
Capacity:0.5-4.0 t/h
Rated thermal efficiency:98%
Fixed working pressure:≤1.25MPa
Applicable fuel:electric energy
Acoustic leak detection is predominantly used in large commercial boilers due to its many advantages, such as real-time detection, remote monitoring capability, and high sensitivity [1,2]. The main technique in acoustic leak detection involves positioning microphones at specific boiler areas to detect sound pressure amplitude.Get Price
In this paper, a mathematical model of leakage sound propagation through a heat exchanger tubes array in boilers is established, which is based on the Twersky's sound scattering theory, transmission grating diffraction theory, Fabry-Perot's interference principle, and algebraic iteration method. The tubes array is made up of large number periodically arranged tubes immersed in air.Get Price
Research on acoustic source positioning method for boilers tube leakage The locating method and the distortion-source position produced by the …Get Price
Nov 07, 2019 · The purpose of the boiler stack and breeching (for multiple boilers) is to provide the draft required by the boiler and burner manufacturer to evacuate flue gases to the point of a safe discharge. Typically, this draft requirement is around 0.05-0.5 inches water column of negative or positive draft.Get Price
passive acoustic position method can be regarded as an effec-tive method which is applied to the boiler tube leakage location technology. THE ANALYSIS OF MAIN INFLUENCE FACTORS We now analyse the effect of combustion temperature fie d and re The researches on the combustion temperature field is based onGet Price
Oct 22, 2021 · 5. Turn the boiler back on. After the pressure has stabilized at 1 or 1.5 bars you should hit the main power switch to power the boiler back on. At this point, your boiler should be pressurized and run properly. If your boiler starts to lose pressure again, turn it off and contact a certified boiler repair person.Get Price
May 01, 2016 · In general, accessing a boiler's CPU requires manufacturers' consent and substantial proprietary software, and if performed by research fieldwork teams, could invalidate boiler warranties. The advantage of using a non-invasive retrofitted method, such as an acoustic sensor, is that warranties are not invalidated and theoretically all boilers Get Price
Sep 12, 2017 · Acoustic source signal is chosen which frequency is 1.5–10 KHz and sound pressure level is greater than 126 dB because the combustion noise in the boiler mainly focuses on the low-frequency stage and the high-frequency acoustic wave has large attenuation. The whole image reconstruction domain is divided into 27 subdomains (3 × 3 × 3).Get Price
A method of detecting damage in a ferromagnetic workpiece such as a boiler tube positions a pair of EMAT coils adjacent to the workpiece at a non-zero angle with respect to one another. A spike pulse is applied to one of the EMAT coils for generating a horizontally polarized shear wave in the workpiece which is capable of being reflected by a flaw, and the amplitude of a reflected …Get Price
Abstract: Acoustic Pulse Reflectometry (APR) has been applied extensively to tubular systems in research laboratories, for purposes of measuring input impedance, bore reconstruction, and fault detection. Industrial applications have been mentioned in the literature, though they have not been widely implemented. Academic APR systems are extremely bulky, often employing source …Get Price
"Ecoacoustic"-Acoustic Scale Remover can be used in boilers, power steam-and water heaters, distillers and refrigerators. Noise-insulating Coating can be applied to noise radiating surfaces of structures and machines. The noise reduction is 6-10 dB within the frequency band of 1.5-2 octaves and 4-6 dB in a wide frequency range.Get Price
boilers account for the majority of steam production and use mostly solid fuels. They comprise the boiler technologies described above, which include PC, FBC, and stoker boilers. Higher-capacity watertube ICI boilers often use a combustion air preheat to improve overall efficiency. .Get Price
Mar 01, 2019 · @article{osti_1560394, title = {Identifying sources of thermoacoustic vibrations (rumble) in industrial furnaces and boilers}, author = {Flynn, T. J. and Fuller, T. A. and Rufener, Suzana and Finney, Charles and Daw, C}, abstractNote = {Industrial gas-fired boilers, furnaces and heaters occasionally suffer low-frequency vibrations generated by dynamic feedback between …Get Price
An efficient, reliable boiler is an essential requirement for many businesses, and the downtime caused by a failed boiler can have a major effect on production, plant and people. The word 'boiler', in everyday use, covers a wide range of equipment, from simple domestic hot water boilers to boilers housed within a power generation plantGet Price
Nov 01, 2011 · Acoustic leak detection is predominantly used in large commercial boilers due to its many advantages, such as real-time detection, remote monitoring capability, and high sensitivity, . The main technique in acoustic leak detection involves positioning microphones at specific boiler areas to detect sound pressure amplitude.Get Price
RESEARCHES ON ACOUSTIC DETECTION METHOD In a boiler, the background noise is a low-frequency sound signal dominated by the combustion noise, while the leakage sound is a high-frequency signal ofGet Price
An apparatus and method for measuring high temperatures in a boiler transmits pulses of acoustic waves, from one side wall of the boiler to an opposite side wall thereof. Acoustic noise within the boiler, as well as the transmitted pulses of acoustic waves are received at the opposite side of the boiler. The received signal is digitized and compared to a digitized sample of the …Get Price
Dec 25, 2018 · Heat exchangers and boilers are widely used in various plants such as power plants and chemical plants. In the heat exchanger and the boiler, a high level sound is sometimes generated from the tube bank installed in a duct. In tube banks, warm gas flows outside of the tube, and due to the external flow around tube banks, the Karman vortex shedding occurs.Get Price
dimensional (3D) source location technique enabling to detect a leak happened on a main boiler tube (Super Heater, Reheater, Economizer, Waterwall) of 500MW class thermal power plant. Acoustic Emission Testing method, one of the Non-Destructive Testing method was applied to detect the low-and high-frequency leakage signal for boiler structure.Get Price
research on acoustic source positioning method for boiler tube leakage..64 jiang, genshan; wang, lin; tian, jing; pan, jie wave propagation interaction in …Get Price
Composite square and monomial power sweeps for SNR customization in acoustic measurements; Research on acoustic source positioning method for boiler tube leakage; Wave propagation interaction in anisotropic piezoelectric porous layer loaded with fluid; Cylindrical harmonic expansion of the sound field due to a rotating line sourceGet Price
Jan 01, 2021 · Based on the change of sound velocity in the high temperature environment of boiler and the spectral characteristics of the leakage sound, we propose the acoustic delay positioning method of the arrays environment at low frequency. This research has significant value for sound location in tube arrays.Get Price
Aug 01, 2017 · Acoustic pyrometry, which is based on acoustic travel-time tomography, can play an important role in industrial applications such as measuring temperatures in boilers, furnaces and flue combustion chambers [2, 5, 6]. It is free from the decrease in penetration depth of the measurement device and easily applied to a gaseous medium, which is the Get Price
of research institutions and personnel, the research of acoustic temperature measurement is mainly in the laboratory and simulation stage, and there are still many problems in practical application. An Liansuo【3】 and others studied the influence of sound source signal and sound source position on furnace temperature measurement.Get Price
Oct 19, 2015 · The paper presents experimental and numerical investigation of pulverized coal combustion process analysis and optimization. The research was conducted on the front-fired pulverized coal boiler with dedicated low-NOx furnace installation. In order to find optimal boiler operating conditions the acoustic gas temperature measurement system and mass flow rate …Get Price
Mar 01, 2019 · @article{osti_1560394, title = {Identifying sources of thermoacoustic vibrations (rumble) in industrial furnaces and boilers}, author = {Flynn, T. J. and Fuller, T. A. and Rufener, Suzana and Finney, Charles and Daw, C}, abstractNote = {Industrial gas-fired boilers, furnaces and heaters occasionally suffer low-frequency vibrations generated by dynamic feedback between …Get Price
Jan 15, 2017 · For the acoustic source in tube arrays, the acoustic radiation have relation with frequency, which have potential application for the acoustic source location. The research can provide new method to study the acoustic behaviour in boilers and provide a basis for the sonic soot cleaning and acoustic boiler tube leak detection.Get Price
@article{osti_5438289, title = {Nondestructive inspection systems for boiler tubes. Final report}, author = {Richman, R H and Rettig, T W and Paterson, S R}, abstractNote = {It was the objective of this project to demonstrate the feasibility of improved boiler tube inspections through the use of state-of-the-art nondestructive evaluation (NDE) methods.Get Price
In boiler, water-cooling wall tube leakage accident is an important factor affecting the safe and economic operation of power station boilers. In this paper acoustic method is applied to locate Get Price
Research on acoustic source positioning method for boiler tube leakage Jiang, Genshan (1), Wang, Lin (1), Tian, Jing (2), Pan, Jie (3) (1) North China Electric Power University, P.R.China (2) State Key Laboratory of Acoustics, Academia Sinica, (3) University of Western Australia, WA, Australia. ABSTRACTGet Price
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