Noise Source of Coal Mill
Date：2016-10-14 Source：zk corp Views:
Most of power plant use the pulverized burning way, grinding coal is an essential part of the pulverizing system, and the pulverized coal can be separated from the mul coal through the separator. The qualified coal powder with the air output, not to return to the mill and then grinding, in order to reduce the mill load and reduce the impact of the mill output at the same time will be larger than a certain size of the coarse particles separated and returned to the mill grinding, without affecting the boiler Combustion efficiency.
Cement plant coal mill noise mainly from the following aspects: is mainly used in coal pulverizing industry, most of the tube mill and coal mill users reflect the mill produce lots of noise in the course of grinding mill , which not only pollute the environment, but also seriously endanger the operation staff’s physical and mental health, and reducing noise becomes an important research topics
1. Cylinder rotation, steel ball and steel ball, steel ball and cylinder, steel balls and materials produce noise generated by collision.
2. Mechanical meshing noise generated by the gear transmission
3. Electromagnetic and exhaust noise generated by the motor.
However, the first noise is the main noise source.
1, Reduce tube mill noise at the sound source
There are many methods to reduce the noise of tube mill from the sound source, but can adapt to the dry-type high-temperature tube mill method is to damping vibration isolation treatment in the cylinder, and use floating liner technology between the elastic buffer,
2, Control noise t,ransmission path: mainly develop fixed or assembled acoustic enclosures which have good sound insulation.
Control noise is an indispensable component in the noise control field. However, this measure can not be considered as a positive measure, because it cannot involve the transformation of the noise source. Sometimes it will bring inconvenience operation to maintain equipment. The most direct, effective and economical measure is "from the sound source to control noise. to reduce the sound source sound for tube mill. Therefore, it is the development trend to control t noise source itself for tube mill noise control.
