A built-in tube bundle isothermal shift reactor

Abstract

The invention relates to a pipe-bundle-builtin isothermal-shift reactor. According to the pipe-bundle-builtin isothermal-shift reactor, axial annular pipe bundles, which are builtin and are uniformly distributed in a catalyst bed layer along circumferential direction, are adopted to shift out heat of reaction, so as to realize isothermal shift; and a central pipe bundle which is built in a central pipe is adopted to preheat raw material gas entering the reactor, so as to realize the builtin of a gas-gas heat exchanger. The isothermal-shift reactor comprises a pressure-bearing shell, a catalyst basket, the axial annular pipe bundles, the central pipe and the central pipe bundle; and the axial annular pipe bundles consist of upper and lower annular pipe boxes, upper and lower annular pipe sheets and heat exchange tubes. According to the pipe-bundle-builtin isothermal-shift reactor, due to builtin pipe bundles, the manufacturing cost of equipment is effectively reduced; due to an end-part bent structure for the heat exchange tubes, the size of the pipe sheets is effectively reduced; due to a heat insulating layer laid between the pipe sheets and the high-temperature catalyst bed layer, the contact between pipe end weld spots and a bed layer high-temperature area is effectively isolated, the probability of leakage is lowered, and the reliability of equipment is improved; and the pipe-bundle-builtin isothermal-shift reactor is compact in structure, low in manufacturing cost, relatively easy in maintenance, high in reliability, complete in function and high in applicability.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and relates to an isothermal shift reactor, in particular to an isothermal shift reactor with a built-in tube bundle. Background technique [0002] The CO shift reaction is a reversible, exothermic reaction, and its reaction equation is: [0003] [0004] When the CO content in the feed gas is high, the heat of reaction must be removed in time, otherwise the temperature of the shift gas will rise sharply, which will cause great damage to the catalyst in the shift furnace, which will directly reduce the life of the catalyst, and may directly The catalyst will be burned out; at the same time, the transformation reaction is a reversible reaction, and if the heat of reaction is not removed in time, the reaction will not proceed in depth. [0005] At present, the commonly used coal gasification processes are coal-water slurry gasification or pulverized coal gasification with coal as raw...

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Problems solved by technology

Although the device can transfer heat with different media through the built-in tube bundle, the reactor has a hot-wall structure (the high-temperature medium is in direct contact with the wall), and is equipped with a large tube plate and a built-in large head, and uses a lot of materials; and its The solder joints of heat exchange tubes and tube sheets are exposed to the high temperature zone of the bed, which affects the reliability of the structure; in addition, the reaction is an adiabatic reaction, and the inherent temperature rise of this type of reaction is not easy to control and other shortcomings still exist

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