Non-hot spot calandria type fixed bed reactors

A fixed-bed reactor and reactor technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve problems such as increased energy consumption, high tube bundle center temperature, and catalyst coking, so as to reduce unevenness, strengthen transmission, etc. Heat rate, effect of increasing heat transfer area

Inactive Publication Date: 2006-02-22
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effective heat transfer method is to increase the heat transfer area, but increasing the tube bundle will bring difficulties to the processing, and the center temperature of the tube bundle will still be high, which is not good for the reaction
At present, most of the ex...

Method used

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  • Non-hot spot calandria type fixed bed reactors
  • Non-hot spot calandria type fixed bed reactors

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Embodiment Construction

[0013] Principle of the present invention, concrete structure and embodiment are described in detail below in conjunction with accompanying drawing:

[0014] figure 1 Schematic diagram of the structure of the non-hot spot tubular fixed-bed reactor provided by the present invention. It mainly includes the lower head of the reactor 1, the upper head of the reactor 10, the tubes arranged between the upper and lower heads of the reactor, the cooling medium inlet 2 at the bottom of the reactor and the cooling medium outlet 9 at the top, for Fix the upper support plate 13 and the lower support plate 14 of the tubes; each tube in the tubes adopts a casing structure composed of an inner tube 6 and an outer tube 5, the inner tube 6 is closed at both ends, and the upper end adopts a tapered structure, To reduce the flow resistance, the catalyst is filled in the casing gap to form a catalyst bed, and the side walls at both ends of the inner tube and the outer tube are connected to the s...

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Abstract

Disclosed is a non- thermal point tubular fixed bed reactor, which is technically characterized in that: every tube of the reactor adopts annular tube structure, the inner tubes being closed, the inner tube and outer tube being linked to the shell side of the reactor by canal, the catalyst being filled into the space between tubes to form a catalyst bed layer, the bottom and top of the tubes being equipped with a cooling medium distributing plate. The diameter ratio of the inner tube to outer tube can be regulated according to the reaction rate and the operation temperature to make the reaction heat transfer to the double- side. Dimension of opening of the cooling medium distributing plate and dimension of the opening of the side- wall of double terminals of inner tube can be regulated to control the distribution of cooling medium between inner tube and the shell side of reactor. With the invention, in the condition of no increasing the number of tubes largely, it can increase the heat- exchange area of the tubular fixed bed reactor and decrease the heat- exchange route.

Description

technical field [0001] The invention relates to a tubular fixed bed reactor, which belongs to the technical field of chemical equipment Background technique [0002] Tubular fixed-bed reactors are widely used in heterogeneous catalytic reaction processes. Most of these reactions have a fast reaction rate and are a strong exothermic process. The heat must be removed through the reactants or heat carriers in a timely and effective manner. Effective heat exchange This method can remove a large amount of heat of reaction released out of the catalyst bed in time to avoid catalyst sintering accidents and some side reactions. At present, ordinary tube-and-tube reactors are mostly used at home and abroad, and the tube side is composed of a bundle of tubes. This kind of reactor is not conducive to improving the heat transfer efficiency, and will make the center temperature of the tubes higher, resulting in side reactions. [0003] Reaction conditions, especially reaction temperature...

Claims

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Application Information

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IPC IPC(8): B01J8/06
Inventor 王金福张同旺王铁峰王光润王德峥
Owner TSINGHUA UNIV
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