Fluid Couplings Function On The Fans In Coal Preparation Plants

The coal preparation plant has many fans and water pumps, and most of these need speed adjustment according to process adjustment needs. Depending on the adjustment conditions, the energy saving rate is about 15% to 25%. Since it is not intermittent operation, the energy saving rate is not very high, but compared with throttling adjustment and venting adjustment, the energy saving is still significant.

The hot flue gas generated by the hot air blower furnace removes sparks through the settling chamber, and is fed into the lower part of the dryer by the hot air blower. The wet material enters from the top of the dryer through the raw coal belt conveyor. After being evenly dried, most of the wet material passes through the bottom of the dryer. The end is output by a belt conveyor, a very small part of the fine materials enters the bag dust collector with the air flow, and the materials separated by the dust collector are recycled as products. The purified gas is discharged from the exhaust pipe through the induced draft fan. The dried materials are sent to the dry separator for sorting by the dry coal belt conveyor, and the sorted materials are output by the belt conveyor respectively. In the above combined process system, there are seven places where adjust speed hydraulic coupling is used for transmission and speed regulation. The purpose is to adjust the working conditions to adapt to process requirements and save energy. Belt conveyors everywhere use torque-limiting hydraulic couplings. The purpose is to solve the problems of light-load starting and overload protection and extend the life of the belt conveyor. Some coal preparation plants separate the drying box from dry separation, but the situation of selecting a hydraulic coupling is roughly similar to this.