Noise Control of Ash Removal Air Compressor Room in Thermal Power Plant

The 240 mm clay bricks are closed to eliminate the influence of direct sound on the outside world. The steel window on the other side of the workshop is fixed (not open), and a layer of airtight and fixed sound insulation windows is added on the outside. The distance between the two windows is 100 mm, the sound insulation window uses 8 mm thick glass.

3) The centrifugal glass wool board with an average sound absorption coefficient of 0.7 is selected, and the metal keel is installed and then filled with sound-absorbing materials to fix it on the inner wall and top of the workshop. And use metal perforated plates and gussets with a perforation rate greater than 20% as the surface protection decoration materials for the wall and top sound-absorbing materials. The purpose of this move is to reduce the noise caused by reverberation in the workshop by 4-10 dB(A). 4) In order to ensure indoor ventilation and cooling requirements, forced ventilation measures shall be taken for enclosed workshops. Open air inlets at the bottom of the walls on both sides near the main entrance of the workshop and install muffler devices. At the same time, two high-power exhaust fans are installed on one side of the indoor duty room, and muffler pipes are used to send indoor hot air to the outdoors.

3 Noise control effect of the ash removal air compressor room After the implementation of the above program, the noise outside the workshop is close to the local value of the environment, and the indoor reverberation sound is also significantly reduced. After testing, the sound level at 1m outside the main entrance of the workshop dropped from 79.6dB(A) before treatment to 54.0dB(A), and the amount of noise reduction reached 25.6dB(A); the indoor reverberation sound level decreased from 82.0dB(A) before treatment It drops to 74.0dB(A) and attenuates 8.0dB(A), the effect is very significant (see Table 3).

4 Conclusion

There are many noise sources in thermal power plants, and the factors leading to excessive noise at the plant boundary are more complex, but the influence of high-noise workshops and equipment closer to the plant boundary dominates. From the perspective of environmental protection, reducing the overall noise level of such workshops is very necessary to protect residents outside the plant. The noise control methods and results of the ash removal air compressor room have certain reference value for the noise control of similar workshops in power plants.