Transverse pipe type heat transfer reaction unit

Abstract

A transverse tubular heat exchange catalytic reaction device, substantially consists of a shell P with a shell cover(s) E, a tube plate(s) (or a circular tube(s)) D linking heat exchange tube(s) B, a porous support plate A supporting the catalyst K, a porous gas distributor C above the catalyst K, a gas inlet 1 and a gas outlet 2 which are on the shell P, a cooling medium inlet(s) 3 and a cooling medium outlet(s) 4 which are on the shell cover(s) E. In the device, the heat exchange tubes B in the catalyst layer are laterally displaced, and the medium in the heat exchange tubes flows laterally. The gas G enters the catalyst layer outside the heat exchange tubes B through the pores of the gas distributor C, flows from top to bottom to react, exchanges heat with the medium L flowing laterally in the heat exchange tubes. It is a reactor with small temperature difference in the catalyst layer, high catalyst activity, high catalyst fill ratio, low layer resistance, simple and reliable structure, and good operational performance.

Description

technical field [0001] The invention is a gas-solid phase catalytic reaction equipment, which is used for fluid catalytic reaction and heat transfer process, belongs to the field of chemical engineering, and is especially suitable for synthetic reaction processes of methanol, methyl ether, hydrocarbons, etc., and can also be used for ethylene oxidation to synthesize epoxy Ethane, vinyl acetate, phthalic anhydride synthesis, ammonia synthesis and other reaction processes. Background technique [0002] For gas-solid phase exothermic catalytic reactions such as synthesis of methanol under pressure, synthesis of methylamine, methyl ether, ammonia, hydrocarbons, etc., as the reaction process progresses, the continuously released reaction heat increases the temperature of the catalyst layer. In order to increase the efficiency of the reactor, it is necessary to remove the reaction heat to lower the reaction temperature. One that was widely used in industrial reactors is multi-sta...

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Problems solved by technology

German Lurgi Company proposed the concept of Megan methanol and developed an air-cooled shell-and-tube water-cooled combined reactor (see Nitrogen & methanol No 261 H.W.Balthazar Jan / Feb 2003). Atlas in Nidda Tobago was successfully put into operation. Although this is the world's first single-series large methanol plant with an annual output of 1.6 million tons, the plant uses two shell-and-tube reactors in parallel and one air-cooled reactor in series. , has the disadvantages of large number of reactors, large investment, and large resistance of methanol synthesis tower

The in-pipe water-cooled large-scale methanol synthesis tower designed by DAVY (see 2005.4.20 "International Methanol conference in China") is used in Trinidad and Tobago with a daily output of 5,400 tons. The tower is vertical and the catalyst bed is tens of meters high , which is easy to grind the methanol catalyst by pressing, and the density of the upper part and the lower part is difficult to be consistent, which may easily cause the uneven distribution of the reaction gas in the radial flow in the catalyst layer and affect the reaction efficiency

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