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Method for Automatically Switching Modes of Reactors in Series

A technology of series reactors and automatic switching, applied in chemical instruments and methods, chemical/physical/physicochemical fixed reactors, organic chemistry, etc., can solve problems such as poor safety and reliability, heavy operating workload, and low work efficiency , to achieve the effect of increasing safety and reliability, good technical effect and improving work efficiency

Active Publication Date: 2019-11-22
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of poor safety and reliability, low work efficiency, and heavy operating workload in the prior art. A new method for automatically switching series reactor modes is provided, which has good safety and reliability and high work efficiency. , The advantages of small operating workload

Method used

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  • Method for Automatically Switching Modes of Reactors in Series

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Effect test

Embodiment 1

[0018] Such as figure 1 As shown, the production scale is 100,000 tons / year hydrogen peroxide method propylene oxide HPPO plant adopts the method for automatically switching series reactor mode of the present invention, propylene and hydrogen peroxide generate propylene oxide by epoxidation reaction, and the number of series reactors N=2 , when the reactor 2 is in normal operation and the reactor 3 is in regeneration operation, the process material inlet valve 11 is opened, the process material outlet valve 13 is opened, the process material bypass valve 15 is closed; the process material inlet valve 12 is closed, and the process material outlet valve 14 is closed , the process material bypass valve 16 is opened. The process stream feed 21 from outside enters the reactor 2 through the process material inlet valve 11 for chemical reaction, the raw material is converted into a product and flows out through the process material outlet valve 13, and the outflow process material 22...

Embodiment 2

[0026] Same as [Example 1], only the production scale is changed to 200,000 tons / year hydrogen peroxide method propylene oxide HPPO plant, the number of reactors in series is N=3, of which 2 reactors are in normal operation, and 1 reactor is in regeneration operation.

[0027] The process operating parameters are as follows: the reaction temperature of the reactor is 60°C, the reaction pressure is 3.0MPaG, and the propylene weight space velocity is 4.2h -1 ; The regeneration temperature of the reactor is 225°C, and the regeneration pressure is 0.7MPaG.

[0028] Through the one-key switching facility of the operation mode of the present invention, it is possible to realize:

[0029] (1) Reactor 1 and Reactor 2 operate normally, and Reactor 3 is regenerated;

[0030] (2) Reactor 1 and Reactor 3 operate normally, and Reactor 2 regenerates;

[0031] (3) Reactor 2 and Reactor 3 operate normally, and Reactor 1 is regenerated;

[0032] One-key automatic switching between the above...

Embodiment 3

[0035] Same as [Example 1], only changed to a methanol-to-olefins MTO plant with a production scale of 1.8 million tons / year, the product gas is removed from the acetylene impurities by catalytic hydrogenation, and the number of series reactors is N=3, of which 2 react The reactor is running normally, and one reactor is in regeneration operation.

[0036] The operating parameters of the process are as follows: the Pd content of the hydrogenation reactor catalyst is 0.25%, the Ni content is 0.31%, and the carrier is alumina Al 2 o 3 , specific surface area 43m 2 / g, the pore volume is 0.43ml / g; the reaction temperature under normal operating mode is 43°C, the reaction pressure is 1.7MPaG, and the gas phase space velocity is 3300h -1 ; The regeneration temperature is 155°C and the regeneration pressure is 1.1MPaG in the regeneration operating mode.

[0037]Through the one-key switching facility of the operation mode of the present invention, it is possible to realize:

[003...

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Abstract

The invention relates to a method for automatic switchover of mode of reactors in series, mainly solving the problems of poor safety and reliability, low work efficiency and high workload in operationof the prior art. According to the method for automatic switchover of mode of reactors in series, the quantity of the reactors in series ranges from 2 to 6, one-key automatic switchover between operation modes, namely the normal mode and the regeneration mode, is achieved, and the conventional safety linkage function is maintained while manual operation is omitted. Further, the above problems aresolved effectively through the technical scheme that the time for switchover between the normal mode and the regeneration mode is shortened to 0.1s; thus, the method can be applied for realizing automatic switchover of mode of the reactors in series.

Description

technical field [0001] The invention relates to a method for automatically switching the modes of series reactors. Background technique [0002] In the production process of chemical process equipment, multiple chemical reactors are used in series to improve the conversion rate of chemical reactions. When the catalyst of one reactor in the series of multiple chemical reactors is regenerated, the reactor needs to be cut out, and the rest of the reaction The device is still running normally to ensure the continuous and stable operation of the chemical process equipment at full load. CN200910259974.0 in the prior art is a mixed atomizer cooling protection system for an entrained bed reactor, which discloses a cooling protection system composed of twelve subsystems, which can effectively protect the equipment and improve the operating rate of the entrained bed reactor. Ensure the safety of personnel and equipment. CN201510500998.6 The method for preventing the explosion of amm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/24C07D303/04C07D301/12
CPCB01J19/004B01J19/245C07D301/12C07D303/04
Inventor 顾诚彪于晓青俞旭波殷家云姚益民何琨
Owner SINOPEC SHANGHAI ENG
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