A tubular fixed bed reactor
A fixed bed reactor and reactor technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve problems such as large axial and radial temperature gradients, achieve heat transfer enhancement, reduce hot spot temperature, and avoid catalysts Effects of deactivation and coking
Active Publication Date: 2016-03-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0007] The purpose of the present invention is to provide a tube-and-tube fixed-bed reactor suitable for highly exothermic heterogeneous catalytic reactions, to solve the problem of large axial and radial temperature gradients in the tube-and-tube reactor in the prior art
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Embodiment
[0030] This embodiment adopts figure 2 The shown process and apparatus carry out the Fischer-Tropsch synthesis reaction. 300 reaction tubes with an inner diameter of 32mm are arranged in the reactor, the outer surface of the reaction tube wall is a porous surface layer, and the inner surface is a smooth surface layer. The porous surface layer is manufactured by iron alloy powder sintering process, the thickness of the porous surface layer is 0.3mm, the opening area ratio is 60%, and the equivalent pore diameter is 0.07mm. The thickness of the smooth surface layer was 3 mm. The reaction tube is filled with Co / Al 2 o 3catalyst. The preparation process of the catalyst used is as follows: take alumina powder, add distilled water dropwise to incipient wetness, record the volume of consumed water, and then calculate the cobalt nitrate impregnation solution based on the cobalt content (calculated as oxide) of 27% by weight. Then impregnate alumina with this solution to incipien...
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The invention relates to a tubular fixed bed reactor. The reactor comprises a reactor shell, an upper reactor tube plate and a lower reactor tube plate (4, 8), reaction tubes (5) and a baffle plate (7), wherein the reaction tubes (5) are fixedly arranged inside the reactor shell (6) respectively by the upper reactor tube plate (4) and the lower reactor tube plate (8); the tube wall of each reaction tube (5) consists of a porous surface layer and a smooth surface layer. As the reaction tubes adopt the combination of the porous surface layers and the smooth surface layers, the heat exchange efficiency can be strengthened and the abrasion to catalyst is also reduced, the problem that axial and radial temperature gradients of an existing reactor are great can be solved, the hot-spot temperature of the reactor can be reduced, and the catalyst deactivation and coking caused by local overheating are prevented, thereby allowing the technological operation to be relatively safe.
Description
technical field [0001] The invention relates to a tube-and-tube fixed-bed reactor, in particular to a reactor suitable for strong exothermic reaction, belonging to the technical field of chemical equipment. Background technique [0002] Tubular fixed bed reactor is a commonly used chemical reactor form, that is, a plurality of reaction tube bundles are arranged in a barrel-shaped container, so that the tube side and the shell side can be used as places for reaction or heat conduction respectively. Such reactors are widely used in heterogeneous catalytic reaction processes, which are characterized by fast reaction rates and usually accompanied by a large amount of heat of reaction. The heat generated must be immediately and effectively exported from the catalyst to avoid adverse effects such as catalyst sintering and side reactions caused by temperature runaway. At present, the shell-and-tube reactors used in the industry basically adopt the heat exchange mode of shell exter...
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IPC IPC(8): B01J8/06
Inventor 徐润胡志海聂红吴昊李猛
Owner CHINA PETROLEUM & CHEM CORP