The impact of cooling tower noise on its treatment measures

　Introduction:Circular counter current cooling towerFor example, the basic principle of its operation is: dry low enthalpy air enters the cooling tower from the lower part of the cooling tower; High temperature water with high partial pressure of saturated steam is sprayed into the upper part through a spray pipe. In the process of water vapor counter current, high-temperature water molecules undergo evaporation at the water vapor interface, entering the air from the water phase and achieving the purpose of cooling high-temperature water.
　　
The impact of cooling tower noise on its treatment measures
　　
Strong noise source of cooling tower
　　
The cooling tower noise is mainly composed of fan sound and water falling noise. Fan noise is the noise generated during the operation of a fan, mainly aerodynamic noise, including rotational noise and eddy current noise, as well as gearbox noise and motor noise driving the fan. The falling water noise is the sound generated by the collision between the water in the cooling tower and the accumulated water in the bottom plate of the tower when it falls from the water spraying device. Its value is related to the height of the falling water and the water flow rate per unit time, and is generally second only to the fan noise. In addition to the above-mentioned noise, there are also noise from water pumps, motors, pipeline radiation noise, etc.
　　
The noise of the cooling tower attenuates according to the law of line sound sources; At 1-0, the noise of the cooling tower decays according to the point source law. According to actual measurements and specialized consultation, when the cooling tower is less than 2001, within the range of equivalent diameter, the noise of the cooling tower is a surface source and does not change; Between 1 and 2 times the equivalent diameter, noise attenuates according to the linear sound source. When the predicted distance from the cooling tower is greater than 2 times the equivalent diameter, noise attenuates according to the point sound source law. For different models and sizes of cooling towers, 0 and 0 should be determined based on actual conditions or consultation with relevant experts.
　　
This prediction model is applicable to small cooling towers, and based on the negative impact of public building air conditioning cooling towers on the environment, this prediction model is suitable for civil building cooling towers.
　　
Due to the impact of noise from cooling towers on prediction modes, the size of cooling towers, and the distance between prediction points and cooling towers, the delineation of different prediction mode ranges is currently not very clear. Relevant experts can be consulted to determine the selection of cooling tower modes and range division.
　　
Measures to address the impact of cooling tower noise
　　
The noise from cooling towers affects work and life, causing inconvenience to people. There are four main ways to reduce noise pollution from cooling towers: reasonable layout, reasonable selection of cooling towers, control of propagation pathways, and protection of the sound receiving body.
　　
reasonable layout
　　
Reasonable layout means implementing functional zoning and separating dynamic and static areas. Due to the strong noise source, cooling towers should be arranged in areas with lower noise requirements such as production areas or activity areas. Avoid being too close to noise sensitive buildings such as offices, dormitories, and residential areas, which may affect the work of employees and residents. Set noise protection distances between different functional areas, and arrange buildings or rooms with relatively low noise requirements near the noise source side in functional areas with high environmental noise.
　　
Reasonably choose cooling towers to reduce noise source intensity
　　
At present, there are many models of cooling towers, including low-noise cooling towers and ultra-low noise cooling towers. When selecting a cooling tower, mitigation measures should be taken. Due to the requirements of the process, when the selected cooling tower has a large noise source and cannot meet the noise function requirements, measures such as noise reduction, shock absorption, and sound insulation can be taken to reduce the intensity of the cooling tower noise source. The main sources of noise in cooling towers are fan noise, water pump noise, and falling water noise. The basic means of reducing noise is to install shock absorption measures such as shock pads and shock springs on various mechanical equipment to avoid equipment vibration noise. Secondly, installing mufflers at the inlet and outlet of the cooling tower fan can effectively reduce the noise of the air outlet by about 10 liters. Furthermore, by installing permeable materials such as metal mesh and polyurethane on the base of the tower, reducing the height of the water falling, etc., the noise of the water falling can be reduced. Additionally, by installing a frequency converter, the noise of the water pump and fan can be reduced.