Multi-tubular reactor and multi-tubular reactor design and fabrication method

Abstract

An objective of the present invention is to provide a multi-tubular reactor with which, when fabricating a substance with an exothermic or an endothermic reaction, it is possible to appropriately control the reaction such that forming of a hot spot or a cold spot is avoided. The present invention relates to a multi-tubular reactor, and a design and fabrication method thereof, said multi-tubular reactor (1) comprising a cylindrical shell (2), a plurality of reaction tubes (10) which are positioned within the shell, and a disk-and-donut baffle (5). The plurality of reaction tubes (10) are arrayed to form a triangular position. One or more of the plurality of reaction tubes (10) are temperature measurement reaction tubes whereupon thermometers (20) are disposed. In a cross-section face of the reactor (1) which is orthogonal to a central axis of the shell (2), a line (BL) which joins a central axis of the temperature measurement reaction tubes and the central axis of the shell, and a line (CL) which joins the central axis of the temperature measurement reaction tubes and a central axis of at least one adjacent reaction tube which is adjacent to the temperature measurement reaction tubes, form an angle of 0-15 degrees.

Description

technical field [0001] The present invention relates to a multi-tubular reactor, the design of the multi-tubular reactor and a method for its manufacture. More specifically, it relates to a multi-tubular reactor having a cylindrical shell, a plurality of reaction tubes arranged in the shell, and disc-and-doughnut type baffle plates, and the multi-tube reactor The design of the reactor and its fabrication method. Background technique [0002] For a multi-tubular reactor (so-called shell-and- In a tube) type reactor), for example, a catalyst is preliminarily filled in a reaction tube, a raw material gas is supplied to the reaction tube, and the raw material gas is circulated in one direction in the reaction tube, and the raw material gas is reacted, so that the target substance ( Hereinafter, it may also be referred to as the generation of "target substance" or "target product"). [0003] In the reaction of the raw material gas in the reaction tube, the reaction temperature...

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Problems solved by technology

[0008] In addition, Patent Document 1 raises the following problem: in the case of a large number of reaction tubes, the difference in the flow pattern of the heat medium tends to be large in the fixed-bed multi-tubular reactor, and if the flow pattern is different, the reaction The thermal conductivity of the tube changes

[0011] However, although the lack of a circular baffle plate can be adopted in a small multi-tubular reactor (the number of reaction tubes is less than 10,000), it cannot be used in a large multi-tubular reactor (the number of reaction tubes is less than 10,000). When the number is more than 10,000), the flow resistance of the heat medium flowing in the casing increases

Therefore, in large-scale multi-tubular reactors, less circular baffle plates are used, and ring-shaped baffle plates (that is, disk-ring type baffle plates) are mostly used, but for properly controlling the large-scale For the reaction in a multi-tubular reactor, it is difficult to guess where to measure the temperature of the reaction tubes based on the technique of Patent Document 1.

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