Catalyst unloading device

Abstract

The invention provides a catalyst unloading device and a method for removing solid catalyst or other solid material from a reactor. The remote end of the tube of a specially-made vacuum device is inserted into the solid catalyst, and a large quantity of fluid nozzles are connected with the cavity of the remote end area of the tube, so that the solid catalyst is loosened, and the loosened solid catalyst is sucked from the remote end to the near end of the tube along the tube. By adopting the device, the vacuum tube can be always positioned on the back of the bed layer of the catalyst, thereby improving the conveying efficiency. In addition, by directly inserting the tube into the reactor through a manhole, the overflow of the catalyst is avoided. In addition, an ideal air gap between the bed layer of the catalyst and a traditional vacuum tube conveyor which are closed to each other is required to be achieved, and the solid catalyst or other solid material can be removed because of the effect of a flow core. As gas is continuously and effectively conveyed to the remote end of the tube, the problem that material can not be conveyed when the distance inserted into the bed layer by a traditional vacuum tube exceeds a limit value can be avoided.

Description

Technical field [0001] The invention relates to a novel catalyst unloading device for petrochemical plants. Background technique [0002] The bed of the hydrocracking unit is very high, and the waste catalyst needs to be reused. Using the existing vacuum equipment to unload the agent, the catalyst has a high crushing rate, which cannot meet the requirements of the waste catalyst for reuse. [0003] The catalyst unloading method involved in CN1376765A is currently the most advanced catalyst unloading method in the catalyst service industry. Flame retardants are used to treat the catalyst surface to form a special film on the catalyst surface, and then vacuum unloading is performed. This method can provide a cleaner unloading environment, but it is not suitable for hydrocracking units with higher and higher beds. The vacuum suction method and device used lead to a higher rate of catalyst fragmentation. [0004] CN1724137A and CN2808283Y relate to a method and device for unloading a si...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems existing in the existing catalyst unloading method and the characteristics of the current hydrogenation devices getting higher and higher, the present invention designs a new type of catalyst unloading device, which can not only improve the catalyst unloading efficiency, but also significantly reduce the catalyst unloading efficiency. Broken rate

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