Flow rate control device

Abstract

The invention provides a flow rate control device which comprises a pipe body. The pipe body can be connected with a delivery pipe, is capable of accommodating a fluid and is provided with a vent hole which penetrates through the pipe body in the radial direction and can be opened and closed. The flow rate control device provided by the invention controls the flow rate of fluid by a flexible gas instead of a rigid sluice valve, so that the direct impact of fluid on the pipe body is avoided, the abrasion, caused by fluid, on the pipe body is alleviated, the service life of the pipe body is prolonged, the phenomena of frequent change of the pipe body is avoided, and the maintenance workload and the production cost are reduced fundamentally.

Description

technical field [0001] The present invention relates to the technical field of control equipment, more specifically, to a flow rate control device. Background technique [0002] Valves are generally provided on the fluid delivery pipelines to adjust the fluid flow, pressure and flow direction. Among them, according to different fluid and process requirements, the types of valves are also different. For example, gate valves need to be installed on fluidized bed catalyst delivery pipelines in the petrochemical industry. [0003] Catalytic cracking units in the petrochemical industry use fluidized bed catalysts to promote the cracking reaction of heavy oil. In order to ensure the conversion rate of the reaction, the activity of the catalyst must be controlled within a certain range, so new catalysts must be replenished regularly. Part of the waste agent is discharged from the agent pipeline. The catalyst is a molecular sieve catalyst made of kaolin, which is a solid particle,...

AI Technical Summary

Problems solved by technology

But sometimes, in order to control the flow of the waste agent, the gate valve only needs to be opened halfway. At this time, when the catalyst of solid particles passes through the gate valve, it will cause wear to the inside of the gate valve, and the wear often leads to the lax closing of the gate valve, which affects the performance of the gate valve. Working life, which in turn affects the normal work of the unloading pipeline, so it is necessary to replace the gate valve frequently

However, frequent replacement of gate valves not only increases the maintenance workload, but also increases production costs

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