How does the central feeding system control the material level and installation height?

The control of the material level in the central feeding system and the characteristics of quantitative feeding and weight-loss metering determine that the mixing hopper supplies the material to the hopper by batch feeding. Therefore, each batch feeding of the mixing hopper will cause large fluctuations in the material level. In order to ensure the continuous and stable feeding of the system, it is necessary to carry out reliable automatic control of the material level of the mixing hopper. However, the central feeding adopts the method of weighing and metering to control the material level in real time.

The mixing hopper is set with high material level and low material level. When the material reaches the high material level, the total material supply of the mixing hopper will decrease by 5%; Similarly, when the material reaches the low level, the total amount of material supplied by the mixing hopper will increase by 5%. Keep the level of the mixing hopper within this range.

In addition, it is also necessary to set very high and ultra-low material levels for alarm. Since the charging device automatically corrects to a stable state after the parameters of the charging device are changed, a process of 10~40s is required, and its set parameters cannot be changed frequently and substantially.

The installation height of the central feeding system is reduced, and the maintenance is convenient. Most of the equipment such as the weight-loss metering feeder and the mixing hopper are installed at a high place (6~13m from the ground) in foreign schemes. The self-designed weightless metering feeder is only 2~3m from the ground, and the mixing hopper is only 5m.

Therefore, the self-designed scheme is better, which is conducive to the maintenance and repair of the equipment. Adopting reasonable centralized feeding scheme design can not only meet the process requirements of the system, but also greatly reduce the engineering manufacturing cost and normal production and operation costs.