Noise reducing and anti-freezing device outside power plant cooling tower

Abstract

The invention provides a noise reducing and antifreezing device used outside a power plant. One of two adjacent noise absorbing plates is fixed with and has an included angle with a horizontal beam, while the other one is arranged in a rotatable way; the cross-sections of the two noise absorbing plates are in a bullet-shape, the effective size of noise absorption is larger, and the gap between the two noise absorbing plates is adjustable, therefore, sound waves produced by a noise source are attenuated repeatedly when passing between the two noise absorbing plates arranged in a slanted way, and the attenuating path is increased; under the conditions of the same distribution density, the effect of noise reduction is more ideal; compared with the prior vertical arrangement proposal, under the same noise reduction conditions, the number of noise absorbing plates adopted by the slanted arrangement proposal of the invention can be reduced by 20 to 40 percent, therefore, the proposal is an ideal proposal to reduce production cost; as the included angle between the two noise absorbing plates is adjustable, the effect of noise reduction can be improved, the cooling tower has antifreezing effect, and the safe and normal operation of the cooling tower in winter is ensured.

Description

Technical field: [0001] The invention relates to a cooling tower water falling noise reduction device used in a power plant, in particular to a cooling tower external water falling noise reducing device. Background technique: [0002] In power plants, the noise generated by the cooling tower falling into the water is very loud, and the noise of the falling water in the cooling tower is as high as about 85 decibels. The state puts forward more stringent requirements for the noise reduction of cooling towers in power plants. The noise at the boundary of power plants must meet the Class III standard in GB12348-90, and the environmental noise must meet the Class 3 standard in GB3096-93, that is, daytime ≤65 decibels, ≤55 decibels at night. For this reason, after noise reduction treatment, the noise reduction rate must be ≥ 25 decibels. The applicant has been researching in the field of cooling, precipitation and noise reduction in power plants for more than ten years, and has ...

AI Technical Summary

Problems solved by technology

After actual research, the noise reduction effect of the existing cooling tower external noise reduction device not only fails to achieve the technical effect described in the 200720108361.3 specification, but also consumes a large amount of sound-absorbing and noise-reducing panels. What is more serious is that when the ambient temperature is lower than 0 ℃, there will be ice hanging on the air inlet of the cooling tower, which will affect the safe and normal operation of the cooling tower in winter. Therefore, it is urgent to develop a cooling tower noise reduction and antifreeze device to meet the requirements of environmental protection transformation

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