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Multi-section indirect heat exchange type radial fixed bed reactor

A radially fixed bed and reactor technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve the problems that the temperature is difficult to control near a predetermined value, the catalyst filling ratio is low, and the production process requirements are high, and the structure is simple. , The effect of large filling ratio and high heat utilization coefficient

Inactive Publication Date: 2016-04-06
张淮海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively utilizes the heat energy generated by the reaction, but there are still problems caused by large circulation ratio and low heat exchange efficiency, which makes the equipment complex, high manufacturing process requirements, large heat exchanger volume, and low catalyst loading ratio. Moreover, due to the limitation of the process, the operating range is narrow, and the temperature is not easy to be controlled near the predetermined value.

Method used

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  • Multi-section indirect heat exchange type radial fixed bed reactor
  • Multi-section indirect heat exchange type radial fixed bed reactor
  • Multi-section indirect heat exchange type radial fixed bed reactor

Examples

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Embodiment 1

[0034] Such as figure 2 As shown, it is a multi-stage heat exchange radial fixed bed reactor for processing 25,000 tons of oxygenate raw materials to produce liquid hydrocarbons according to an embodiment of the present invention. It includes a cylindrical shell 1, and the shell 1 has upper and lower For the heads 2 and 3, the upper head 2 is provided with a raw material inlet 4 and the circulation gas auxiliary line inlet 5, and the lower head 3 is provided with a reactant outlet 7, a circulation gas main line inlet 6 and a heat exchange medium inlet 9. In addition, the casing 1 may include conventional facilities such as manholes, pressure detection holes, and thermocouple wire holes.

[0035] The housing 1 is provided with four stages of catalytic reaction devices, including a catalyst basket 13 and a bottom plate 15 of the catalytic reaction device.

[0036] A casing heat exchanger 12 is arranged along the central axis, and the upper and lower ends of the casing heat exc...

Embodiment 2

[0041] Such as image 3 As shown, it is a multi-stage heat exchange radial fixed-bed reactor for producing gasoline from oxygenates according to another embodiment of the present invention.

[0042] This embodiment has the same structure as Embodiment 1, but there are five catalytic reaction devices arranged axially in the casing. The total height of the above four catalyst baskets is 4.8 meters and the thickness is 0.3 meters. The total amount of ZSM-5 catalyst loaded on the market is 8.5m 3 . The bottom catalyst basket is 2.4 meters high and 0.4 meters thick, and the total amount of modified ZSM-5 catalyst loaded is 9.6m 3 .

[0043] Working process is identical with embodiment 1.

[0044] The oxygen-containing compounds used as raw materials in the above-mentioned embodiments can be methanol, ethanol, dimethyl ether, etc., and their mixtures or with other C 1 -C 8 mixture of hydrocarbons and water.

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Abstract

The invention relates to a multi-section indirect heat exchange type radial fixed bed reactor which is used for a heat release chemical reaction. The multi-section indirect heat exchange type radial fixed bed reactor comprises a cylindrical shell, a catalytic reaction device, a sleeve type heat exchanger and a fin arranged on the sleeve type heat exchanger. Inlet temperatures and outlet temperatures of different reaction regions of the reactor with the type, provided by the invention, are controlled in a limited range close to a pre-set optimal value. Compared with the prior art, the multi-section indirect heat exchange type radial fixed bed reactor has the advantages that the temperature of a catalyst bed layer can be steadily controlled to be close to the pre-set optimal value in a relatively large range by using a simple method; the utilization efficiency of a catalyst is high, the filling ratio is great and the catalyst is easy to load and unload; the multi-section indirect heat exchange type radial fixed bed reactor has a simple structure, relatively low requirements on manufacturing and installation processes, and low capital construction cost and operation cost; and the heat loss is small and the utilization coefficients are high.

Description

technical field [0001] The present invention relates to a radial flow fixed bed reactor for exothermic chemical reactions. In particular, the present invention relates to such a radial flow fixed bed reactor for exothermic chemical reactions, having a cylindrical shell with upper and lower heads, inside said cylindrical shell at least one or A plurality of catalyst reaction zones with reactant inlets and reaction product outlets enables the inlet and outlet temperatures of different reaction zones to be controlled within a limited range around predetermined optimum values. Background technique [0002] The radial fixed bed reactor has the following advantages: 1. Large flow area, small pressure drop, and small particle catalyst can be used, so the reaction rate is high and the production intensity is high; 2. The structure is simple and the capital investment is small; 3. Forced airflow Uniform distribution etc. [0003] In recent years, radial fixed bed reactors have been...

Claims

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Application Information

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IPC IPC(8): B01J8/04
CPCB01J8/0449B01J2208/00106
Inventor 张淮海赵世瑜
Owner 张淮海
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