Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for identifying noise source in waste heat boiler

A technology of internal noise and identification method, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of failure to consider the boiler regeneration noise, the inability to accurately find the noise source in the furnace, and the inability to effectively reduce the noise of the waste heat boiler and other issues to achieve the effect of reducing noise pollution and saving noise reduction costs

Active Publication Date: 2014-08-06
HUADIAN HEAVY IND CO LTD
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for identifying noise source in waste heat boiler
  • Method for identifying noise source in waste heat boiler
  • Method for identifying noise source in waste heat boiler

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for identifying a noise source in a waste heat boiler. The method comprises the steps that S1, a two-dimensional bare pipe model is established, the flow field and the sound field of bare pipes of two pipe arrays of a high-pressure superheater and a deoxidizing evaporator are respectively calculated in a simulated mode, the sectional characteristic frequency is calculated, and the characteristic frequency range inside the whole boiler is estimated; S2, a finned pipe finite element model is established, the flow field and the sound field of each single finned pipe in the two pipe arrays of the high-pressure superheater and the deoxidizing evaporator are respectively calculated in a simulated mode, the sectional characteristic frequency is calculated, and the characteristic frequency range inside the whole boiler is estimated; S3, the characteristic frequency of the pipe arrays is corrected; S4, the normal frequency is calculated and whether the normal frequency is excited to generate sound cavity resonance or not is judged; S5, sound transmission loss and sound insulation calculation are conducted on the boiler and total noise in the boiler is obtained with the combination of actually-measured noise data; S6, the contribution to the noise in the boiler by different kinds of noise is calculated, and a main source of the noise in the boiler is determined. The method can be used for accurately identifying the source of the noise inside the waste heat boiler of a gas turbine.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com