A connection structure and method for a powder conveying channel

Abstract

The invention discloses a connection structure and method for a powder conveying channel. The connection structure includes an inner cylinder, an outer cylinder, an inner cylinder anti-wear block, and an inner cylinder receiving ring. The inner and outer cylinders nested in each other are set to realize the connection of the two joints with lined pipes. A radial expansion gap is reserved between the inner and outer cylinders and the lined pipes, and an expansion joint is reserved between the ends of the two joints with lined pipes. , to avoid the problem that the lined pipe expands and expands and radially expands to cause the pipe to be damaged, and the inner cylinder is provided with an anti-wear block at the expansion joint between the ends of the two lined pipes to prevent the powder from being transported from the reserved expansion Seam erosion and wear; when the inner and outer cylinder casing structures are installed, an appropriate amount of powder to be conveyed is poured into the annulus formed by the outer cylinder and the lower section liner pipe, and the inner cylinder is inserted into the outer cylinder to seal the gap, avoiding powder The risk of body leakage from expansion gaps and expansion joints is eliminated, and the reliable and efficient connection of channels is realized.

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 ...

AI Technical Summary

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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