An elliptical helical tube microchannel gas-solid phase reactor

Abstract

The invention discloses a gas-solid phase reactor. The two ends of the cylindrical shell are respectively fixed with an upper tube plate and a lower tube plate, and a plurality of elliptical cross-sections are connected between the upper tube plate and the lower tube plate. Micro-channel spiral tube; the stainless steel fixed support network wall between the upper tube plate and the lower tube plate has a plurality of holes or grooves, and its outer wall is wrapped with a filter tube, and the upper end of the stainless steel fixed support network is connected with the gas phase inlet and outlet channels. The invention has the characteristics of excellent heat transfer effect, compact equipment structure, small gas phase resistance, large loading capacity of reactants, fast heat transfer speed, convenient operation and the like.

Description

technical field [0001] The invention relates to a thermal compressor, chemical heat pump, heat storage, and heat exchange heterogeneous gas-solid reactor, which is especially suitable for the hydrogenation / dehydrogenation gas-solid phase reaction of metal hydrides and hydrogen, and belongs to the technical field of chemical reactor design . Background technique [0002] At present, there are mainly the following categories of gas-solid phase reactors involving heat exchange in the reaction process at home and abroad: [0003] Tubular reactor - the raw material solid is placed in the reaction tube with a filter, and the filter tube placed in the reactor is used as a ventilation pipe. The gas phase diffuses to the surrounding solid phase through the filter tube, and the endothermic / exothermic during the reaction process Carried away / input by the heat exchange fluid outside the reactor. This kind of tubular reactor has the characteristics of simple structure, compactness, hig...

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Problems solved by technology

This reactor has higher heat exchange efficiency and reaction rate, but because the time of gas phase permeation whole reactor is longer, its reaction rate is subject to certain influence, and gas phase needs high pressure just can enter reaction bed interior (Appl.Therm .Eng.,1998,18(6):457-480)

[0006] Bow-shaped plate reactor and ring-disk reactor—have the advantages of compact structure, large filling capacity, and simple operation, but the structure is relatively complicated, the solid phase and structural parts are not easy to replace, installation and maintenance are difficult, and their large-scale application still needs to be further developed Research (Chinese invention patent 201010510847.6, 200510042823.1)

[0007] Microchannel Reactor—Using microchannels as heat exchange fluid pipes, it has high heat exchange efficiency, compact structure, and fast reaction rate. The phenomenon of elongation and shortening, in the process of long-term use of the reactor, may cause the rupture of the heat exchange fluid pipe, and the gas phase permeates the entire reaction bed for a long time (Shanghai: 2008 Chemical Machinery Annual Conference. 2008, 58-62; China, ZL200710018259.9)

[0008] Other types of gas-solid phase reactors—such as stacked reactors, U-tube reactors, and built-in annular heat exchange pipe series reactors have compact structure and simple operation, but the heat exchange efficiency of the reaction bed is low. difficulties in the process

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