Novel rotary drum type coking coal dryer sealing device

Abstract

The invention discloses a novel rotary drum type coking coal dryer sealing device. The novel rotary drum type coking coal dryer sealing device comprises an adjusting supporting frame, a friction ring, a sealing body, an ash hopper supporting base, an ash hopper, a small retaining ring and a large retaining ring. The small retaining ring is welded to a drum body and is a movable seal ring. The large retaining ring is welded to a discharge box structure and is a fixed seal ring. A labyrinth seal is formed between the large retaining ring and the small retaining ring. A second labyrinth seal is formed between the ash hopper and the friction ring. The sealing body serves as the last seal and comprises an abrasion resistant plate, a sealing material, a press plate, a friction plate and a reflective plate.

Description

technical field [0001] The invention relates to sealing, in particular to a novel sealing device for a drum type coking coal dryer. Background technique [0002] In order to ensure that the coke oven is produced under the condition that the coal loaded in Shanghai has a stable water content, the coking coal usually needs to be dried to the selected target value before being loaded into the furnace: control the moisture content to about 6%. And this is achieved by the tumble dryer. The oxygen content in the dryer needs to be strictly controlled. When the internal oxygen content exceeds the standard, it may cause danger such as explosion. This requires a more reasonable sealing structure to prevent air leakage, causing the oxygen content inside the dryer to exceed the standard, and preventing the leakage of coal powder, causing problems such as operating environment pollution. [0003] At present, the commonly used sealing devices of drum type coking coal dryer mainly includ...

AI Technical Summary

Problems solved by technology

The packing seal has serious packing wear and often falls off; the deviation of the concentricity of the steam pipe rotary dryer causes the packing to be eccentric, resulting in serious seal leakage; there is no axial compensation device; the linear speed of the packing is high, resulting in high surface temperature of the sealing device. Inconvenient maintenance; short service life of seals, etc.

In order to avoid the contact between the dynamic and static sealing rings during the movement, the labyrinth seal takes into account factors such as thermal expansion and contraction, series motion, bending and radial runout, etc. It cannot be too small, so the biggest disadvantage of the labyrinth seal is that the sealing effect is not ideal, and it can only be used in occasions with low pressure or in combination with other seals

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