Method used for heat liberation pressurization catalytic reaction

A catalytic reactor and reactor technology, applied in chemical instruments and methods, heat exchanger types, indirect heat exchangers, etc., can solve the problems of high processing difficulty, poor radial heat transfer effect, slow reaction speed, etc. Achieve the effect of optimizing the design of the runner cross section, strengthening the radial cross heat transfer, and improving the heat transfer effect.

CN101254442AInactive Publication Date: 2008-09-03EAST CHINA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2008-09-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for exothermic catalytic reaction under increased pressure and a reactor thereof. The method and the reactor are characterized in that: a round pressure vessel (7) with a catalytic bed (4) is used; a gas inlet (1) is positioned on an end cover of the vessel (7) and connected with an internal distribution drum (5) to form a shunt passage (2) for reacting gases; a gas outlet (11) is communicated with a space that is formed between the wall of the vessel (7) and an external distribution drum (6), to form a concentration passage (3) for the reacting gases, the catalytic bed (4) is defined between the external distribution drum (6) and the internal distribution drum (5) and is filled with catalysts; the reacting gases flow axially in a centrifugal manner from the internal distribution drum (5) to the external distribution drum (6). The method and the reactor have the advantages of axial and uniform distribution of the reaction gases, optimum distribution of bed temperature, high utilization rate of catalysts, and low pressure drop of fluids passing through the reactor. The invention is suitable for catalytic reactions in methanol, ammonia and dimethyl ether synthesis, as well as other exothermic gas-solid catalytic reactions under increased pressure.
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Description

technical field

[0001] The invention belongs to the technical field of chemical reaction engineering, specifically, it relates to a method for exothermic pressurized catalytic reaction and its reactor, in particular to a method for synthesizing methanol, ammonia, dimethyl ether and other catalytic reactions and its reactor. Background technique

[0002] As we all know, fixed-bed catalytic reactors are generally used for the catalytic reaction process of synthesizing methanol, ammonia, dimethyl ether, etc. In order to reduce the resistance of the reactor bed, increase the space velocity and increase the production capacity, a fixed bed radial catalytic reactor is used. In addition, for gas-solid phase catalytic exothermic reactions such as synthesis of methanol, ammonia and dimethyl ether under pressure, as the reaction process progresses, the continuously released heat of reaction will increase the temperature of the catalyst layer. In order to improve the reaction process ...

Examples

Embodiment 1

[0065] The composition of raw gas is: CO 13.3%, CO 2 4.96%, H 2 75.62%, CH 4 0.98%, Ar+N 2 4.75%, CH 3 OH 0.34%, gas space velocity 6500h -1 , the methanol synthesis reaction process with a reaction temperature of 210-260°C and a reaction pressure of 8MPa adopts figure 1 , figure 2 or image 3 Any one of the three ways shown. The composition of the obtained product gas is: CO 7.30%, CO 2 5.11%, H 2 70.1%, CH 4 1.21%, Ar+N 2 5.71%, CH 3 OH9.89%, H 2 O 0.68%; the axial difference of bed temperature in the reactor is less than ±2°C, the axial distribution deviation of gas flow is less than ±2%, the reactor pressure drop is less than 0.2MPa, and the space-time productivity is 0.78t / m 3 .h, heat exchange tubes account for less than 30% of the cross-section of the catalyst bed, the temperature distribution of the bed is close to the optimal temperature distribution curve, and the daily methanol production is 3,000 tons.

Embodiment 2

[0067] The composition of raw gas is: CO 13.4%, CO 2 4.96%, H 2 75.63%, CH 40.98%, Ar+N 2 4.75%, CH 3 OH 0.32%, gas space velocity 6500h -1 , the methanol synthesis reaction process with a reaction temperature of 210-260°C and a reaction pressure of 10MPa adopts figure 1 , figure 2 or image 3 Any one of the three ways shown. The composition of the obtained product gas is: CO 6.58%, CO 2 5.24%, H 2 69.3%, CH 4 1.32%, Ar+N 2 5.82%, CH 3 OH10.85%, H 2 O 0.89%; the axial difference of bed temperature in the reactor is less than ±2°C, the axial distribution deviation of gas flow is less than ±2%, the reactor pressure drop is less than 0.2MPa, and the space-time productivity is 0.79t / m 3 .h, heat exchange tubes account for less than 30% of the cross-section of the catalyst bed, the temperature distribution of the bed is close to the optimal temperature distribution curve, and the daily methanol production is 3,000 tons.

[0068] The reaction gas enters the spl...