Powder conveying channel connection structure and method

Abstract

The invention discloses a powder conveying channel connection structure and method. The connection structure comprises an inner barrel, an outer barrel, inner barrel anti-abrasion blocks and an innerbarrel receiving ring; due to the fact that the inner barrel and the outer barrel which are arranged in a mutual sleeved manner are arranged between an upper section pipe with a lining and a lower section pipe with a lining, wherein the upper section pipe with the lining and the lower section pipe with the lining are to be connected, connection of the two sections of pipes with the linings is achieved; radial expanding gaps are reserved between the inner barrel and the outer barrel, and the pipes with the linings, and expanding seams are reserved between the end heads of the two sections of pipes with the linings, so that the problem that because the pipes with the linings expand and extend and expand in the radial direction, pipeline crushing is caused is solved; the inner barrel anti-abrasion blocks are arranged at the positions of the expanding seams between the end heads of the two sections of pipes with the linings, so that it is avoided that due to powder conveying, scouring abrasion is caused on the reserved expanding seams; and when the inner and outer barrel sleeved structure is installed, a proper amount of conveyed powder is poured into a ring gap formed by the outer barrel and the lower section pipe with the lining, the gap blocking effect is achieved after the inner barrel is inserted into the outer barrel, the risk that powder leaks from the expanding gaps and theexpanding seams is avoided, and reliable and efficient connection of a channel is achieved.

Description

technical field [0001] The invention relates to the field of powder engineering, and relates to a powder pneumatic conveying device, in particular to a powder conveying channel connection structure and method. Background technique [0002] Thermal stress and wear problems widely exist in engineering fields such as mineral processing, metallurgy, thermal energy and power, chemical industry and oil refining. For the process of pneumatic conveying of high-temperature powder, the erosion of particles on the wall of the container is usually serious. In addition, there are temperature changes in the conveying channel from cold start to hot operation or the reverse process, which in turn causes thermal stress of thermal expansion and contraction Therefore, it is necessary to overcome thermal stress and wear problems at the same time when designing high-temperature powder conveying channels. [0003] In consideration of wear and heat insulation, wear-resistant refractory materials ...

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Problems solved by technology

[0005] For the above-mentioned similar working conditions, if a metal expansion joint is used to connect two sections with lined powder conveying channels, the inner wall of the metal expansion joint is easily washed and worn by the high-temperature powder entrained by the airflow. In addition, when the temperature of the metal expansion joint is high It is easy to be pulled apart and cause two-phase flow leakage

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