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A slurry bed reactor

A reactor and slurry bed technology, applied in the field of three-phase reactors, can solve the problems of intensified fluid backmixing, chimney effect, and low heat transfer coefficient, achieve uniform heat and concentration distribution, improve convective heat transfer coefficient, Uniform heat and mass transfer effects

Active Publication Date: 2018-08-10
ATHCO ENG SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat transfer coefficient of row-and-tube, coil-wound, column-and-tube and casing-type is not high. When the heat transfer intensity is high, a large number of heat exchange elements is required and a large space is required. The axial flow and circulation of the fluid make the velocity gradient and the gas holdup gradient significantly increase with the increase of the tube density and the superficial gas velocity, which intensifies the back mixing of the fluid and forms a hidden danger of gas short circuit; The lateral damping effect is increased to weaken the "chimney" effect, but at the same time, the fluid resistance is increased, and the manufacturing process of the pin finned tube is complicated

Method used

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  • A slurry bed reactor
  • A slurry bed reactor
  • A slurry bed reactor

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Experimental program
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Effect test

Embodiment 1

[0049] Such as Figure 5 As shown, a slurry bed reactor, the heat exchange assembly is formed by two sets of identical heat exchange plate bundles arranged up and down, and the two sets of heat exchange plate pair bundles are installed in the reactor shell 1 .

[0050] The heat exchange plate pair bundle is formed by a plurality of heat exchange plate pairs 8 arranged in parallel to form a cylindrical heat exchange plate pair bundle. The heat exchange plate pair 8 is formed by welding two plates to form a closed cavity. The surface a of the heat exchange plate is provided with regularly arranged welding contacts c, and the two plates are in contact at the welding contacts c. Make the plate form an uneven surface, which will disturb the cooling or heating medium. The density of the welding contact c is adjusted according to the heat transfer requirements of the reaction, the allowable pressure drop and the medium passing capacity. The density range is 200-5000 / m 2 ; Inside eac...

Embodiment 2

[0059] As shown in Figure 3, the plurality of pairs of heat exchange plates 8 are arranged in a fan shape to form a bundle of cylindrical heat exchange plates. Cloth, the heat exchange plate is radial to the beam cross section. An annular support is provided at the bottom of the heat exchange plate pair 8, and an annular heat exchange plate spacer is provided at the top, and bayonets arranged uniformly along the circumferential direction are arranged on the spacer, and the heat exchange plate pair 8 and the heat exchanger The included angle between the hot plate pair 8 can be adjusted according to the position of the corresponding bayonet. At least one opening is left on the top and bottom of each heat exchange plate pair 8, and each opening is connected to the distribution main pipe 12 or collection main pipe 10 above or below it through a respective vertically arranged distribution branch pipe 11 or collection branch pipe 9, respectively. The distribution main pipe 12 and t...

Embodiment 3

[0063] Such as Figure 4 As shown, the heat exchange plate pairs 8 are regularly arranged in the form of concentric circles to form a cylindrical heat exchange plate pair bundle. The heights of different pairs of heat exchange plate pairs 8 are the same, and the radians can be the same or different. There is a fixed gap between adjacent heat exchange plate pairs 8, which is conducive to the mixing of materials in the radial direction. At least one port is left on the top and bottom of each heat exchange plate pair 8, and each port passes through its own vertical distribution branch pipe 11 Or the collection branch pipe 9 is connected to the distribution main pipe 12 or the collection main pipe 10 above or below it, and the distribution main pipe 12 and the collection main pipe 10 are parallel up and down, and are arranged at the cross-sectional diameter positions of the two ends of the circular heat exchange plate, and are respectively connected to the cooling Or the heat medi...

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PUM

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Abstract

The invention relates to a novel slurry bed reactor, which comprises a reactor casing, a heat exchange assembly, a gas distribution device and a solid-liquid separator, wherein the heat exchange assembly is arranged in the reactor casing; the bottom of the heat exchange assembly is provided with the gas distribution device; the top of the heat exchange assembly is provided with the solid-liquid separator; the heat exchange assembly can be formed by combining a plurality of heat exchange plate pair beams; all heat exchange plate pair beams are in vertical arrangement; each heat exchange plate pair beam is formed by distributing a plurality of pairs of heat exchange plate pairs in parallel to form a cylinder shape or distributing the heat exchange plate pairs according to the fan shape, the spiral shape and the concentric circle shape to form a cylinder shape; the distribution mode and the distribution directions of the vertically adjacent heat exchange plate pair beams are regulated and changed according to the reaction characteristics. Compared with the prior art, the novel slurry bed reactor has the advantages that the heat exchange efficiency is high, the temperature distribution is uniform, gas short circuit is avoided, the reaction selectivity is high, the gas-liquid-solid three-phase distribution is uniform, the structure is compact, and the like.

Description

technical field [0001] The invention relates to a three-phase reactor, in particular to a slurry bed reactor. Background technique [0002] Slurry bed reactors are widely used in three-phase reaction processes such as coal-to-oil Fischer-Tropsch synthesis reactions. Some reactions are strongly exothermic and require internal heat extraction. In addition, during the enlargement process of slurry bed reactors, temperature distribution often occurs Uneven, leading to adverse consequences such as excessive local temperature rise, catalyst carbon deposition or deactivation, and reduced reaction selectivity, which affect the amplification effect. Therefore, the slurry bed reactor combined with efficient and uniform heat exchange elements can solve the above problems. question. [0003] At present, the forms of heat exchange elements in slurry bed reactors include: shell and tube type, casing type, coil type, serpentine tube type, row tube type and needle finned tube type, etc. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/18C10G2/00
Inventor 李凤清孙苑洱傅建敏
Owner ATHCO ENG SHANGHAI CO LTD