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Noise Control of Apartment building Cooling Tower
Abstract: The noise is the sound of people do not need. Noise may be caused by natural phenomena, or it may be formed by the people's lives. The noise can be disorderly broadband sound; it can be harmonious rhythm tone. When the voice over people's lives and social activities, the extent permitted by the noise pollution. Noise pollution is a kind of environmental pollution, it is considered second only to air pollution and water pollution. Like smog, noise, diffuse around the people, especially in urban and industrial areas, it is a deadly chronic toxins. Strong noise can cause tinnitus, ear pain, hearing loss. According to the determination of more than 115 db of noise can also cause deafness. Noise exceeds 85dB, make people feel upset, people will feel noisy, and therefore can not concentrate on work, resulting in lower efficiency, noise pollution good governance is particularly important. The cooling tower is a device for refrigeration equipment, water recycling, the hot water cooling and recycling, The tower operation noise, vibration easily affect the environment, impact on the life, work and live in the surrounding residents and the people who work, This requires governance, the noise and vibration of the cooling tower has reached the effect of vibration and noise reduction. In general, the noise of the large cooling towers belonging to the high-frequency stationary noise, high-density tower fell into the water on the bottom of a large area of continuous direct impact arising from drowning noise, its strength is equivalent to the number of times of storm intensity, Due to the huge cooling tower noise sound source, the sound power level, the IF attenuation and propagation distance away, an unusual range of impact strength and impact on the surrounding environment, Although most plants are required to stay away from urban noise hazards is not prominent. But in fact there are still some built in the outskirts of power plant cooling tower noise on the surrounding environment had a greater impact, the noise level of the cooling tower emissions is clearly beyond the noise national standards corresponding to the local environment, the cooling tower is located in these regions should attributed to the governance of the column, The project of the cooling tower, cooling tower 13, the problem is that when the cooling tower open a serious impact on next to the apartment building, next to the swimming pool as well as the work area of the bottom of the cooling tower, was complaints from surrounding residents and office workers, requiring transformation. Generally speaking, the noise of the cooling tower is mainly composed of four noise : fan intake and exhaust noise; watering noise; fan reducer and motor noise; pipe and valve noise and vibration, Cooling tower noise control Muffler, according to the noise characteristics of the cooling tower, rubber vibration pad, pipe clamps, acoustic enclosures and other equipment to achieve the effect of vibration and noise reduction, First cooling tower noise in the governance of the cooling tower noise reduction project site measurements, and then according to the test results of the A sound level meter to convert the sound power level, In accordance with national noise emission standards to determine the actual emissions of the cooling tower noise is excessive(including the night noise emissions exceeded), excessive is serious, In order to better and more clearly show the difference between the actual noise and national standards, production statistics cubic said, Specific for each noise reduction equipment are calculated according to the corresponding parameters of the cooling tower and selection, After theoretical calculations design, construction, and after construction acceptance, verified governance cooling tower noise emission standards.
Keyword: Big Cooling Tower; Muffler Silencer; Silencing Shutter; Sound Absorption; Spring Absorber
目录
1 前言 5
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