Causes of noise in circular cooling towers and noise reduction measures

Causes of noise in circular cooling towers and noise reduction measures

Many people find that the noise is loud after purchasing a circular cooling tower. How do these noises occur? Let’s analyze it for you today.

　　 1. The noise of the circular cooling tower is mainly caused by fans and falling water:

　　1. Fan noise of circular cooling tower: The greater the fan motor power, the greater the fan noise generally. Fan noise is low frequency noise, strong penetrating power, not easy to attenuate. The noise of the fans of the same power of the tower and the cross-flow tower are equal. Of course, there are also low-noise circular cooling towers.

　　2. Water falling noise of the circular cooling tower: the structure of the circular cooling tower is caused by the noise of water falling from the filler to the water surface of the collecting pan. The falling water noise is high frequency noise, which decays quickly. The packing of the cross flow tower is very close to the water collecting pan, and the noise of falling water is very small. Most of the towers are of circular structure, and most of the cross-flow towers are of square structure, so the circular cooling tower is relatively noisy.

　　 2. What are the noise reduction measures for circular cooling towers:

　　 1. Reasonable layout of circular cooling tower

　　 Reasonable layout is to realize functional partitioning, separating movement and static. Due to the large noise source, the circular cooling tower should be arranged in areas with low noise requirements such as production areas or activity areas. Avoid getting 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 of the circular cooling tower, and arrange buildings or rooms with relatively low noise requirements near the noise source side in the functional areas with higher environmental noise.

　　2, circular cooling tower base vibration reduction

　　 is mainly to isolate the vibration of the equipment to reduce the impact of the equipment vibration on the structure.

　　3, circular cooling tower sound insulation

　　 Under the condition of satisfying the wind exchange coefficient, a sound insulation facility circular cooling tower outer cover is installed on the outside of the circular cooling tower. Generally, the sound insulation measures can reach the effect of 156.

　　4. Circular cooling towers control the transmission route

　　 When sound waves encounter obstacles, reflection and diffraction will occur, which reduces the energy of sound waves received by the external sound body. You can use natural shelters, or set up sound barriers, green belts, etc. to reduce the impact of noise.

　　 Three, the application range of circular cooling tower:

　　(1) Metallurgical machinery, petrochemical, silicate industry

　　(2) Closed loop of soft water for blast furnace in ironworks;

　　(3) The cooling water system of the heating furnace, crystallizer and other devices of the steelmaking plant;

　　(4) Cooling water system of rolling mill and coking plant;

　　(5) Cooling water system of blower, motor, rolling mill and other equipment;

　　(6) Cooling water system for medium frequency induction furnace, medium and high frequency power supply and electric control, melting furnace, diathermic furnace, quenching furnace, vacuum furnace, induction holding furnace;

　　(7) Oil circuit cooling and grinding tool cooling of machining equipment; circular cooling tower for air compressor cylinder liner cooling.