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A gray-based polyurethane sound-absorbing and noise-reducing material for biomass power plants

A technology of polyurethane and biomass, which is applied in the direction of sound-generating devices and instruments, can solve the problems of resource waste and environmental pollution, and achieve the effects of fast molding, improved sound absorption performance, and simple processing and operation

Active Publication Date: 2018-04-20
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the rice husks are used for power generation. If the by-product rice husk ash is not utilized, it will cause great environmental pollution and waste of resources. [10]

Method used

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  • A gray-based polyurethane sound-absorbing and noise-reducing material for biomass power plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The proportion of polyurethane black and white materials is 1:1, 43% each, expanded perlite accounts for 4% of the total material, and rice husk ash accounts for 10%.

[0032] The polyurethane black and white material is (XY) n-type linear block copolymer.

[0033] The rice husk ash is the rice husk ash of the power plant, which is ground by a ball mill for 30 minutes to make the fineness meet the specification requirements, not higher than 80 μm, and the treated rice husk ash has higher volcanic activity.

[0034] The specific process is:

[0035] (1) For preparation, apply engine oil evenly in the mold for standby;

[0036] (2) Put polyurethane black and white material, expanded perlite, and rice husk ash in a beaker in turn according to the ratio, and stir for 6 seconds with an electric stirrer at a speed of 120r / min to make a polyurethane foam prepolymer containing inorganic particles;

[0037] (3) Pour the prepolymer into the mold quickly and gently, and use a sh...

Embodiment 2

[0041] The proportion of polyurethane black and white materials is 1:1, 40% each, expanded perlite accounts for 10% of the total material, and rice husk ash accounts for 10%.

[0042] The polyurethane black and white material is (XY) n-type linear block copolymer.

[0043] The rice husk ash is the rice husk ash of the power plant, which is ground by a ball mill for 30 minutes to make the fineness meet the specification requirements, not higher than 80 μm, and the treated rice husk ash has higher volcanic activity.

[0044] The specific process is:

[0045] (1) For preparation, apply engine oil evenly in the mold for standby;

[0046] (2) Put polyurethane black and white material, expanded perlite, and rice husk ash in a beaker in turn according to the ratio, and stir for 6 seconds with an electric stirrer at a speed of 120r / min to make a polyurethane foam prepolymer containing inorganic particles;

[0047] (3) Pour the prepolymer into the mold quickly and gently, and use a s...

Embodiment 3

[0051] The proportion of polyurethane black and white materials is 1:1, 40% each, expanded perlite accounts for 5% of the total material, and rice husk ash accounts for 15%.

[0052] The polyurethane black and white material is (XY) n-type linear block copolymer.

[0053] The rice husk ash is rice husk ash from a power plant, which is ground by a ball mill for 30 minutes to make the fineness meet the specification requirements, not higher than 80 μm, and the treated rice husk ash has higher volcanic activity.

[0054] The specific process is:

[0055] (1) For preparation, apply engine oil evenly in the mold for standby;

[0056] (2) Put polyurethane black and white material, expanded perlite, and rice husk ash in a beaker in turn according to the proportion, and stir for 6 seconds with an electric stirrer at a speed of 120r / min to make a polyurethane foam prepolymer containing inorganic particles;

[0057] (3) Pour the prepolymer into the mold quickly and gently, and use a sho...

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Abstract

The present invention provides a biomass-power-plant-ash-based polyurethane sound absorption noise reduction material comprising the following basic components in the formulation by weight percent wt%: 40-43% of a black polyurethane material and 40-43% of white polyurethane material in the ratio of 1: 1, 4-10% of expanded perlite and 10-15% of rice husk ash. The middle-low frequency sound absorption properties of the biomass-power-plant-ash-based polyurethane sound absorption noise reduction material are improved, sound absorption coefficients of blank polyurethane foam at characteristic frequency points of 250Hz and 500Hz are both less than 0.2, sound absorption coefficients of the modified material at the characteristic frequency points of 250Hz and 500Hz reach 0.36 or more, thermal conductivity is improved by 3-6 times, sample processing operation is simple, forming is rapid, and the biomass-power-plant-ash-based polyurethane sound absorption noise reduction material is economic and environmentally-friendly.

Description

technical field [0001] The invention relates to a modified sound-absorbing and noise-reducing material, in particular to a biomass power plant ash-based polyurethane sound-absorbing and noise-reducing material suitable for medium and low frequency noise. Background technique [0002] Once upon a time, the creation and use of various mechanical equipment brought prosperity and progress to human beings, which were considered a symbol of the development of modern industry. But today, noise in cities has brought serious troubles to people's lives. With the development of economy and society, contemporary noise pollution is becoming more and more serious, and various diseases caused by noise are increasing day by day, devouring people's health. Therefore, noise pollution has become the fourth largest pollution in the world after air pollution, water pollution and solid waste pollution. [1] . To control the noise, you can reduce the noise of the sound source, such as using low-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08K7/26C08K3/36G10K11/162
CPCC08K3/36C08K7/26C08K2201/003C08L2203/14G10K11/162C08L75/04
Inventor 周旻耿军军曾建王腾王小书侯浩波袁佳歆袁剑
Owner WUHAN UNIV
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