A kind of insulation structure of isobutane dehydrogenation device

Abstract

The invention discloses a heat insulation structure of an isobutane dehydrogenation device. The heat insulation structure comprises pipelines connected through flanges, and heat insulation layers are arranged outside the pipelines. The heat insulation structure is characterized in that heat insulation chambers wrapping the flanges are arranged outside the flanges on the pipelines, each heat insulation chamber comprises a lower heat insulation chamber which can wrapping the corresponding flange and an upper heat insulation cover, the upper portion of each lower heat insulation chamber is provided with an opening, each upper heat insulation cover covers the opening of the corresponding lower heat insulation chamber, an upper port of each lower heat insulation chamber is provided with multiple grooves penetrating through the interior and exterior of the corresponding heat insulation chamber, the outer side of a lower port of each upper heat insulation cover is provided with a shield cover, each shield cover can cover the openings in the outer sides of the grooves in the upper port of the corresponding lower heat insulation chamber after closing of the corresponding upper heat insulation cover, and a gap is reserved between the outer side wall of each shield cover and the outer side wall of the corresponding lower heat insulation chamber. According to the heat insulation structure of the isobutane dehydrogenation device, the heat insulation effect is good, maintenance is convenient, leaked hydrogen can be effectively prevented from being gathered in the heat insulation chambers, and operation safety of the device is ensured.

Description

technical field [0001] The invention relates to a thermal insulation structure of an isobutane dehydrogenation device, belonging to the technical field of chemical equipment. Background technique [0002] At present, the external pipelines of the isobutane dehydrogenation unit are made of insulation cotton wrapped with iron sheets as the insulation layer, and the flanges connecting the pipelines are also wrapped together in the insulation layer. This kind of thermal insulation structure has great defects: First, when the flange needs to be disassembled for maintenance, the maintenance can only be carried out after the external thermal insulation layer is dismantled as a whole. Second, because the material transported in the pipeline is hydrogen, hydrogen leakage is inevitable at the flange joints of the pipeline. If the leaked hydrogen accumulates in the insulation layer for a long time, it is easy to Causing an explosion is a great safety hazard. Contents of the inventio...

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Problems solved by technology

This kind of thermal insulation structure has great defects: First, when the flange needs to be disassembled for maintenance, the maintenance can only be carried out after the external thermal insulation layer is dismantled as a whole. Second, because the material transported in the pipeline is hydrogen, hydrogen leakage is inevitable at the flange joints of the pipeline. If the leaked hydrogen accumulates in the insulation layer for a long time, it is easy to Explosion is a great safety hazard

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