Internal and external gas barrier device of screw conveyor

Abstract

The invention discloses an inner and outer gas barrier device of a screw conveyor, which is installed on the screw conveyor of a spiral thermal cracking reaction furnace. The inner and outer gas barrier device of the screw conveyor comprises: an isolation unit, a gas pressure detection unit, a barrier A gas supply unit, a sealing unit and a cooling kit, the isolation unit has a chamber inside; the gas pressure detection unit is used to detect the gas pressure value in the chamber; the barrier gas supply unit pressurizes the barrier gas into the chamber to form the inside and outside of the chamber The air pressure is unequal; the sealing unit includes a ring sleeve arranged on the outer side of the end cover plate of the isolation unit and surrounding the rotating shaft, and a groove is formed between the inner wall surface of the ring sleeve and the outer surface of the rotating shaft; an elastic seal ring is arranged in the groove ; A ring cover presses the elastic seal in the groove and presses against the gap between the end cover plate and the shaft; the cooling kit is arranged on the inner side of the chamber to cool the temperature of the shaft and avoid damage to the elastic seal on the outside, so as to improve the production operation security.

Description

technical field [0001] The invention relates to the technical field of cracking furnace reactors, in particular to an internal and external gas barrier device of a screw conveyor that prevents the internal gas of the screw conveyor of a spiral thermal cracking reactor from contacting with the outside air. Background technique [0002] Screw conveyor is a kind of continuous conveying equipment without flexible traction components. By means of the thrust of the rotating screw, the material is conveyed along the direction parallel to the central axis of the screw. The structural composition of a general screw conveyor includes a material tube, a screw blade, a rotating shaft, bearings at both ends, a middle suspension bearing and a driving device. The helix composed of the helical blade and the rotating shaft is supported by bearings at both ends and a suspension bearing in the middle, and is driven by a driving device. When the screw conveyor is working, the material enters t...

AI Technical Summary

Problems solved by technology

However, since the screw conveyor 1 feeds materials in the hot air chamber 4, the inside of the material pipe 11 is in a high-heat environment, so the directly heated end plate 111 and the rotating shaft 13 are also heated to become high-heat components, and the sealing structure 114 has been heated by the high-heat end plate 111 and the rotating shaft 13 for a long time, and its sealing material is very easy to be reimbursed early and cause air leakage. In addition, if there is no detection and early warning mechanism at this stage, once the air leakage situation intensifies , and when the air outside 113 of the material tube invades into the internal space 112 of the material tube, it is very easy to cause a safety accident that the material tube 11 of the screw conveyor 1 explodes

Images