Methanol tower reboiler with fluid uniformly distributing function

Abstract

The invention relates to a methanol tower reboiler with a fluid uniformly distributing function, for overcoming the conditions that in the prior art, fluid distribution inside and outside of a heating pipe is not uniform, and that a fluid flowing by a baffle plate is in a cross-flow state, so that the pressure loss is great, and vibration exists during the operation process. The methanol tower reboiler is characterized in that multiple stages of connected distributors are welded on the inner wall of a tube of an upper channel, ultra-thin deflecting fences and a steam distributing barrel with rectangular holes are welded on the inner wall of a shell side pipe bundle barrel, positioning rods are intersected horizontally and vertically and are welded to ultrathin support rings, so as to form rectangular spaces for positioning the heating pipe, each rectangular space of the ultra-thin deflecting fences and the heating pipe passing through the rectangular spaces form bevel edge concave arc triangular current flow gaps, the contact gaps between the rectangular spaces of the ultra-thin deflecting fences and the heating pipe are very small. The methanol tower reboiler has the beneficial effects that through the arrangement of the multiple stages of connected distributors, the flow state of the fluid inside the heating pipe is improved, and the purpose that the liquid is uniformly distributed in the heating pipe is achieved.

Description

technical field [0001] The invention belongs to the technical field of methanol tower reboiler equipment, in particular to a methanol tower reboiler with the function of uniform fluid distribution used for preparing propylene oxide by a hydrogen peroxide method. Background technique [0002] Propylene oxide, aka Propylene oxide , Methyloxirane , is a colorless ether-flavored liquid with low boiling point and flammability. It is an important organic chemical raw material, an important bulk organic chemical product in petrochemical production, and one of the most important intermediate products of fine chemical industry. It is mainly used in production Polyether polyol , propylene glycol and various nonionic surfactant etc., where polyether polyol is produced polyurethane foam , insulation materials, elastomers, adhesives and coating and other important raw materials, various Nonionic Surfactant in petroleum, chemical, pesticide , Textile, daily chemical and other...

AI Technical Summary

Problems solved by technology

[0005] Among the devices that have been put into operation with the existing technology of hydrogen peroxide production of propylene oxide, the maximum processing capacity of hydrogen peroxide production of propylene oxide is 100,000 tons / year. Due to the small diameter of the cylinder, after the fluid directly enters the equipment, It can be evenly distributed and can meet the production process requirements, but the processing capacity is low

[0006] The methanol column reboiler with a maximum processing capacity of 300,000 tons / year for the production of propylene oxide by hydrogen peroxide method is currently the largest production device for producing propylene oxide by hydrogen peroxide method in the world. Due to the improvement of the processing capacity of the device, The large-scale equipment has been realized, and there is a problem that, due to the increase in the diameter of the cylinder and the increase in the number of heating tubes, the fluid directly enters the equipment, resulting in uneven distribution of the fluid inside the heating tube and outside the heating tube, which cannot meet the requirements. Fluid uniform distribution requirements; in addition, the existing equipment uses a common baffle structure with a thickness of 20 mm, that is, a number of through holes through which the heating tube passes are processed on the baffle plate made of steel plate, and the heating tube The gap between the baffle hole and the baffle hole is very small, so the fluid outside the heating tube can only flow through the multi-layer baffle, so that the flow state of the fluid flowing through the baffle is a cross-flow state, resulting in a large pressure loss, and There is a problem of vibration during the operation of the equipment. After the equipment is enlarged, the vibration problem of the equipment during operation becomes more serious, and the pressure loss is also difficult to control within the range required by the process system.

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