The monitoring results show that the noise of each measuring point at the lm outside the sound insulation board of the second floor of the machine room is 937964dB(A), and the noise of the No.1 air compressor is 1067dB(A). The noise is very strong. . The two oxygen compressors installed on the second floor are currently treated with sound insulation panels, but the noise value of each measurement point at 1m outside the enclosure is 913945dB(A), even at the west end of the 12 points, the noise value is still 902dB. (A). Therefore, it can be determined that the operating noises of the two turbine air compressors and the two oxygen compressors on the second floor are the sound sources that constitute the plane noise on the second floor, and reverberation is formed in the equipment room and affect each other. From the comparison of the sound level intensity of each measuring point, the noise values ​​of the 7 measuring points of the No. 1 air compressor west and the 10 measuring points of the adjacent No. 2 oxygen compressor east are 945dB (A) and 942dB (A) respectively. Close, while the No. 1 oxygen compressor West's 11 measured 915dB (A), the west side of the machine room's 12 measuring point 904dB (A), showing a significant decreasing trend. Therefore, it can be determined that the noise of four machines in the equipment room is mainly based on the noise of two turbine air compressors. The noise on the first floor of the machine room was analyzed from the installation of the machine room. The two water compressors and the two water compressors were installed on the first floor through the second floor floor, and the process pipes were mainly arranged on the first floor. Therefore, according to the theory of sound propagation, the noise on the first floor is mainly caused by the noise transmission on the second floor and the connection of the pipelines on the first and second floors, and the noise generated by the pump on the first floor is mixed. The noise of each measuring point around the water cooler of the flat air compressor on the first floor is 9651035dB(A), which is obviously higher than the measuring points on the second floor plane (except in the acoustic enclosure of the air compressor at 15:1), so the second floor is determined. The 112-point noise test is due to the barrier of the sound insulation enclosure as a non-direct source, but the noise of the refraction and penetration through the acoustic enclosure, and the noise test value of each measurement point on the first floor is mainly the floor channel (mounting hole) ) Directly propagate noise. Analysis of the cause of noise 2 sets of turbine air compressors in Daye Smelter Oxygen Station are high-speed and large-volume air compressors with a speed of 12000r/min, air transport medium and air volume of 32000m3/h. The working principle is: driven by electric motor The high-speed rotating impeller continuously draws in the outside air through the suction pipe, and compresses the air to raise the pressure of the air, and then discharges the compressed air through the exhaust pipe, thereby achieving the purpose of conveying the air. Generally, there are three kinds of noise when the air compressor is running. One is the mechanical (vibration) noise and the motor noise of the air compressor: the air compressor noise and exhaust noise; the third is the exhaust noise. The first is local noise, which is in the category of mechanical and electromagnetic noise, and the latter two are aerodynamic noise. Through on-site field investigation and analysis, it can be determined that the air compressor inlet noise has a good noise reduction and noise reduction effect due to the configuration of the corresponding air intake filter; the air compressor basic design is reasonable, basically meets the vibration isolation requirements, so vibration causes The noise is not large; in addition, the venting noise does not have a large impact due to the position of the emission. Therefore, this study mainly analyzes the following noise sources to be controlled. The exhaust noise is known from the working principle of the turbo air compressor. The high-speed rotating impeller compresses the air to work, so that the inhaled external air medium instantaneously collides with the molecules, thereby increasing the pressure of the air medium. In the process, there is some energy. It is converted into heat and sound energy and radiated to the surrounding environment by means of the casing and the conveying pipe. The on-site monitoring results show that the noise value is up to 1067dB(A) at 1m from the machine (in the sound insulation enclosure), even at the noise level of each measurement point outside the plane acoustic enclosure on the second floor is 937964dB(A), the first floor plane The noise of each measuring point is 9651035dB(A), which is the maximum noise directly jeopardizing the operator of the equipment room. Conclusion (1) The noise of the turbine air compressor system in the oxygen plant of the Daye Nonferrous Metals Corporation smelter is mainly composed of the local noise and exhaust noise of the air compressor. The noise source has a strong noise level and has obvious broadband characteristics. There are also oxygen compressors operating at the same time, and there are also noise effects. Their combined effects constitute physical and mental health effects and hazards to the operators of the equipment room, causing pollution to the near-Earth acoustic environment. (2) For the local noise of the air compressor and the airflow noise of the conveying gas pipeline, the high-efficiency combined sound insulation cover sound insulation is adopted in the main part of the second floor of the machine room, the building sound insulation is adopted on the first floor, and the damping of the pipeline in the equipment room is adopted. Comprehensive treatment technical measures such as sound insulation. Cement Truck Semi Trailer,Used Cement Truck Semi Trailer,Pneumatic Tanker,Cement Truck Semi Trailer For Sale SHANGQIU CITY TONGDA SPECIAL VEHICLE MANUFACTURING COMPANY LIMITED , https://www.sqtdgc.com