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Internal noise source identification method of waste heat boiler

An internal noise and identification method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of not considering the boiler regeneration noise, unable to accurately find the noise source in the furnace, and unable to effectively reduce the waste heat boiler noise. and other problems to achieve the effect of saving noise reduction costs and reducing noise pollution

Inactive Publication Date: 2014-04-23
HUADIAN HEAVY IND CO LTD
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Problems solved by technology

The above method does not consider the regenerative noise inside the boiler. It is considered that the exhaust noise of the gas turbine is the main noise source in the furnace, and the noise source in the furnace cannot be accurately found, so the corresponding noise reduction measures cannot effectively reduce the noise of the waste heat boiler.

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  • Internal noise source identification method of waste heat boiler
  • Internal noise source identification method of waste heat boiler
  • Internal noise source identification method of waste heat boiler

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Embodiment Construction

[0051] Embodiments of the invention:

[0052] Due to the coupling of flow, heat, and sound in the furnace, the tube array itself is composed of finned tubes with spiral fins, and its geometric characteristics are complex. The resources required for complete modeling and calculation are too large, so the analysis model is made as follows Simplifications and assumptions:

[0053] 1. According to the relationship between the components of the flue gas, use the gas state equation to calculate the physical characteristics of the flue gas, and find that the difference between its various indicators and air is not more than 5%, and use air instead of flue gas in the calculation;

[0054] 2. Since the heat exchange process itself does not generate noise, it only indirectly affects the physical properties of the flue gas, so the heat exchange between the furnace wall and the pipe wall during the flue gas flow is not considered, and the thermodynamic parameters of the flue gas between t...

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Abstract

The invention discloses an internal noise source identification method of a waste heat boiler. The method comprises S1, establishing a bare tube two-dimensional model, separately simulating the flow field and the sound field of the bare tubes under two tube arrays of a high-pressure superheater and a deaerating evaporator, calculating segment characteristic frequency and estimating the integral characteristic frequency range inside the boiler; S2, establishing a finned tube finite element model, separately simulating the flow field and the sound field of a single pipe of finned pipes under the two tube arrays of the high-pressure super heater and the deaerating evaporator and calculating segment characteristic frequency to estimate the integral characteristic frequency range inside the boiler; S3, correcting the characteristic frequency of the tube arrays; S4, calculating normal frequency and determining whether to excite the normal frequency to generate sound chamber resonance; S5, calculating the sound transmission losses and the sound insulation of the boiler to be combined with actually-measured data to obtain total boiler internal noise; S6, calculating the contribution of different types of noise to the boiler internal noise to determine the main noise source of the boiler internal noise. The internal noise source identification method of the waste heat boiler can help identify the internal noise source of the waste heat boiler accurately.

Description

technical field [0001] The invention relates to a method for identifying a noise source inside a waste heat boiler, belonging to the technical field of boiler noise identification. Background technique [0002] With the development of China's urbanization process and the increase of urban electricity demand, gas turbine power plants, which are relatively clean power plants, are getting closer and closer to residential areas. Waste heat boiler is an important part of gas turbine power plant. Compared with gas turbine and cooling tower, although the noise sound pressure level of waste heat boiler is relatively small, its sound radiation area is larger, and the sound pressure level is far higher than the general environmental regulations. Therefore, the effective control of waste heat boiler noise is a key part of the noise control of the entire power plant. If it is not well controlled, the noise pollution it produces will endanger the health of people in nearby residential ar...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 赵迎九黄福安钟振茂任玉凤魏普余平覆王奇
Owner HUADIAN HEAVY IND CO LTD
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