High-temperature valve sealing heating device for propane dehydrogenation device

Abstract

The invention provides a high-temperature valve sealing heating device for a propane dehydrogenation device, relates to the technical field of valve sealing, and aims to solve the technical problem that nitrogen supplied to a valve is delivered at normal temperature, large temperature difference can cause impact damage to the interior of a high-temperature valve cavity to affect the service life of a high-temperature gate valve in the prior art. The sealing device comprises a nitrogen storage tank and a heating structure, wherein the nitrogen storage tank is connected with the heating structure and the heating structure is connected with a high-temperature valve, and nitrogen in the nitrogen storage tank flows through the heating structure, can be heated by the heating structure and then flows into a cavity of the high-temperature valve. The device is used for increasing the temperature of nitrogen flowing into the cavity of the valve.

Description

technical field [0001] The invention relates to the technical field of valve sealing, in particular to a high-temperature valve sealing heating device for a propane dehydrogenation device. Background technique [0002] Propylene is an important chemical raw material, mainly used in the production of PP, acrylic acid, etc., and propane dehydrogenation is one of the main methods for producing propylene at present. [0003] like figure 2 As shown, the propane dehydrogenation to propylene (PDH) unit uses the CATOFIN process to convert propane into propylene on a fixed chromium-aluminum catalyst bed, and the reaction conditions are 600 ° C and an absolute pressure of 0.05 MPa. The propane dehydrogenation unit consists of eight reactors 11, and the eight reactors 11 are operated periodically. At any time: (a) three reactors are in the reaction stage, (b) three reactors are in the reheating / regenerating stage, (c) one reactor is in evacuation, steam purging, d) one reactor is air...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-temperature valve sealing and heating device for propane dehydrogenation equipment to solve the problem in the prior art that the nitrogen gas supplied to the valve is delivered at normal temperature, and the large temperature difference will cause impact damage to the interior of the high-temperature valve chamber and affect the high temperature. Technical problems of gate valve service life

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