Vertical Mill Sealed Feeder

Abstract

The invention provides a hermetic feeder for a vertical mill. The feeder comprises a mill feed belt, a blanking pipe, a blanking straight pipe, a horizontal insertion plate and a negative pressure meter, wherein the blanking pipe is arranged below the mill feed belt; the blanking straight pipe is connected below the blanking pipe; the horizontal insertion plate is arranged in the middle section of the blanking straight pipe; the length of the horizontal insertion plate stretching into the blanking straight pipe can be adjusted by an actuating mechanism, so that a blanking space is formed by agap between the horizontal insertion plate and the blanking straight pipe and is used for materials to pass through; and the negative pressure meter is arranged above the blanking pipe, is connected with an automatic control system and a central controller, and is provided with an upper limit value and a lower limit value, so that negative pressure starts dropping from a normal value when the blanking straight pipe is blocked, the automatic control system makes the actuating mechanism start acting to open the horizontal insertion plate when the negative pressure reaches the lower limit value,the negative pressure rises due to automatic dredging of material scouring, the automatic control system makes the actuating mechanism close the horizontal insertion plate when the negative pressure reaches the upper limit value, and the negative pressure is restored to the normal value.

Description

technical field

[0001] The invention relates to a vertical mill sealed feeder. Background technique

[0002] Each raw material vertical mill for cement production is generally equipped with an air lock feeder. In all series of air lock feeder systems, air lock and feeding are both an important point and a difficult point; No effective air lock equipment has been designed by the Type Mill Research Institute.

[0003] If the internal blades of the airlock feeder are worn out, the airlock effect will be greatly reduced, and a large amount of cold air will enter the vertical mill, which not only reduces the heat required for the raw material grinding of the vertical mill, but also increases the raw meal circulation fan. And the kiln exhaust fan handles the air volume, in other words, it not only reduces the output of the raw meal vertical mill, but also increases the power consumption. Therefore, the air lock requirements of the feed inlet of the raw meal vertical mill are rel...

Images