Dryer structure with hollow negative pressure filter element

Abstract

The invention discloses a dryer structure with a hollow negative pressure filter element. The dryer structure comprises the hollow negative pressure filter element, a filter element motor, a liquid separation tank, a vacuum pump, a drying roller and a driving device used for driving the drying roller to rotate. A feeding port is formed in the feeding end of the drying roller, the middle of the hollow negative pressure filter element is located in the drying roller, one end of the hollow negative pressure filter element is connected with an output shaft of a filter element motor, the other end of the hollow negative pressure filter element is communicated with an inlet of the liquid separation tank, and the top of the liquid separation tank is communicated with an inlet of the vacuum pump. The outer side face of the middle of the hollow negative-pressure filter element is of a spiral structure, a material guide plate is arranged in the drying roller, the filtering effect of the structure is good, filter cakes are fully dried, and reliability is high.

Description

technical field [0001] The invention relates to a dryer structure, in particular to a dryer structure with a hollow negative pressure filter element. Background technique [0002] A large amount of gray water will be generated during the operation of the coal gasification plant. The gray water enters the preliminary water treatment system and uses a vacuum bag filter to separate the coal slime from the gray water. The filter cake is discharged outside, and the gray water is recovered and recycled. As the core equipment of the primary water treatment system, the vacuum bag filter is widely used in coal-water slurry and dry powder gasification devices due to its simple structure and high production utilization rate. However, in the actual operation process, the vacuum bag filter has a high failure rate and the on-site operation is intensive. For example: when dealing with coal slime, tearing of the cloth and damage to the bag machine frequently occur due to deviation of the f...

AI Technical Summary

Problems solved by technology

However, in the actual operation process, the vacuum bag filter has a high failure rate and the on-site operation intensity is high.

For example: when dealing with coal slime, tearing of the cloth and damage to the bag machine frequently occur due to deviation of the filter cloth; The cloth is easy to deviate and tear, and cannot filter the black water flowing on site, resulting in poor environmental sanitation on site; the liquid drainage tank cannot drain liquid, and the water is pumped into the vacuum pump, which makes the vacuum pump work less efficient and the water content of the filter cake is high; this not only affects the production drainage The slag brings great pressure, which threatens the smooth production of the system, and also causes relatively large economic losses.

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