CN212152453U - System for producing adiponitrile through electrochemical series connection - Google Patents
System for producing adiponitrile through electrochemical series connection Download PDFInfo
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- CN212152453U CN212152453U CN202020396381.0U CN202020396381U CN212152453U CN 212152453 U CN212152453 U CN 212152453U CN 202020396381 U CN202020396381 U CN 202020396381U CN 212152453 U CN212152453 U CN 212152453U
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Abstract
The utility model relates to a system for producing adiponitrile by electrochemical series connection, which comprises a circulating carrier inlet pipe, a circulating carrier outlet pipe and a plurality of groups of reaction groups, wherein the reaction groups are arranged between the circulating carrier inlet pipe and the circulating carrier outlet pipe in parallel; each group of reaction groups comprises a liquid conveying pipe, a mixer, an online analyzer and a plurality of reactors connected in series, wherein the inlet end and the outlet end of the liquid conveying pipe are respectively connected with a solution circulation carrier inlet pipe and a circulation carrier outlet pipe, and the mixer, the plurality of reactors and the online analyzer are sequentially arranged on the liquid conveying pipe from the inlet end to the outlet end; the method solves the problems of low one-way reaction efficiency, large electrolyte circulation amount, high energy consumption, huge equipment pipelines and high investment cost in the prior art.
Description
Technical Field
The utility model relates to a system for electrochemistry series production adiponitrile belongs to adiponitrile's apparatus for producing technical field.
Background
The process for producing adiponitrile by Acrylonitrile (AN) dimerization method is developed successfully in the first 20 th century 60 s by Monsanto company in America, and gradually develops from a diaphragm type electrochemical synthesis method to a diaphragm-free electrochemical synthesis method, and because the one-way efficiency of AN electrochemical reactor is low, the adopted production process is that a plurality of electrochemical reactors are connected in parallel.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art exists not enough, and the technical problem that solve provides a system of electrochemistry series production adiponitrile to solve the one-way reaction efficiency that current technology exists low, the electrolyte circulation volume is big, the energy consumption is higher, and the equipment pipeline is huge, problem that investment cost is high.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
a system for producing adiponitrile by electrochemical series connection comprises a circulating carrier inlet pipe, a circulating carrier outlet pipe and a plurality of groups of reaction groups, wherein the reaction groups are arranged between the circulating carrier inlet pipe and the circulating carrier outlet pipe in parallel;
every group the reaction group includes transfer line, blender and a plurality of reactor of establishing ties, the entering end and the play end of transfer line are connected respectively and are dissolved circulation carrier and advance the pipe and circulate carrier exit tube, have set gradually blender and a plurality of reactor from advancing the end to the play end on the transfer line, are connected with sampling device on the transfer line between last reactor of every group reaction group and the circulation carrier exit tube.
Each set of the reaction groups may also be configured to include a plurality of mixers, one mixer being provided at the inlet of each reactor.
Furthermore, a circulation carrier inlet valve and a circulation carrier outlet valve are respectively arranged on the circulation carrier inlet pipe and the circulation carrier outlet pipe, a liquid inlet valve is arranged on a liquid conveying pipe between the mixer and the reactor, and a liquid outlet valve is arranged on a liquid conveying pipe between the last reactor of each group of reaction groups and the circulation carrier outlet pipe.
Further, each group of reaction groups comprises 1-10 reactors connected in series.
Further, each group of reaction groups comprises 2-5 reactors connected in series.
Further, the sampling device is connected with a gas chromatograph, and the gas chromatograph is a 9790PLUS type.
Furthermore, the mixer is provided with a raw material inlet, a liquid supplementing inlet and a circulating carrier inlet.
Further, a stirring device is arranged in the mixer, a raw material inlet is formed in the top of the mixer, a liquid supplementing inlet and a circulating carrier inlet are formed in the side face of the mixer, a mixed liquid outlet is formed in the bottom of the mixer, the circulating carrier inlet is connected with a circulating carrier inlet pipe, and the mixed liquid outlet is connected with the reactor through a liquid conveying pipe; the fluid infusion inlet is connected with a fluid infusion tank through a fluid infusion pipe, and the fluid infusion pipe is provided with a booster pump and a flow valve.
Furthermore, the liquid supplementing inlet and the circulating carrier inlet are respectively positioned at two sides of the mixer.
Further, the inside flow distribution plate that still is provided with of blender, the flow distribution plate is located the inboard of fluid infusion import and circulation carrier import, the flow distribution plate is the V type, and the surface is provided with many diffluent recesses that the orientation is different.
Compared with the prior art, the utility model following beneficial effect has:
the system adopts a plurality of electrochemical reactors connected in series in parallel to produce adiponitrile, and after the series process is adopted, the circulating ring carrier can react through a plurality of reactors, so that the one-way reaction efficiency is improved, and the production efficiency is improved. The circulation quantity of the circulating carriers after being connected in series can be reduced by times, the diameter of a pipeline for conveying the circulating carriers, the number and the model of conveying equipment and a separator are greatly reduced or reduced, and the production investment cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a system in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of the mixer structure in the system of the present invention.
Fig. 3 is a schematic view of the flow divider in the system of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure: 1-circulating carrier inlet pipe, 2-circulating carrier outlet pipe, 3-liquid conveying pipe, 4-mixer, 5-sampling device, 6-reactor, 7-circulating carrier inlet valve, 8-circulating carrier outlet valve, 9-liquid inlet valve, 10-liquid outlet valve, 11-stirring device, 12-raw material inlet, 13-liquid supplement inlet, 14-circulating carrier inlet, 15-mixed liquid outlet, 19-liquid supplement pipe, 20-liquid supplement tank, 21-booster pump, 22-flow valve, 23-flow distribution plate and 24-flow distribution groove.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Example 1
A system for producing adiponitrile by electrochemical series connection comprises a circulating carrier inlet pipe 1, a circulating carrier outlet pipe 2 and a plurality of groups of reaction groups, wherein the reaction groups are arranged between the circulating carrier inlet pipe 1 and the circulating carrier outlet pipe 2 in parallel;
each group of reaction groups comprises a liquid conveying pipe 3, a mixer 4 and a plurality of reactors 6 connected in series, wherein the inlet end and the outlet end of the liquid conveying pipe 3 are respectively connected with a circulating carrier inlet pipe 1 and a circulating carrier outlet pipe 2, and the mixer 4 and the reactors 6 are sequentially arranged on the liquid conveying pipe 3 from the inlet end to the outlet end; a sampling device 5 is connected on the liquid conveying pipe 3 between the last reactor 6 of each group of reaction groups and the circulating carrier outlet pipe 2. The sampling device 5 is connected with a gas chromatograph, which is of 9790PLUS type.
A circulating carrier inlet valve 7 and a circulating carrier outlet valve 8 are respectively arranged on the circulating carrier inlet pipe 1 and the circulating carrier outlet pipe 2, a liquid inlet valve 9 is arranged on a liquid conveying pipe between the mixer 4 and the reactor 6, and a liquid outlet valve 10 is arranged on a liquid conveying pipe between the on-line analyzer 5 and the circulating carrier outlet pipe 2;
each group of the reaction groups comprises 1 to 10 reactors 6 which are connected in series.
Each group of the reaction groups comprises 2-5 reactors 6 which are connected in series.
The reactor 6 is an electrochemical reactor.
The mixer 4 is provided with a raw material inlet 12, a fluid infusion inlet 13 and a circulating carrier inlet 14.
A stirring device 11 is arranged in the mixer 4, a raw material inlet 12 is arranged at the top, a liquid supplementing inlet 13 and a circulating carrier inlet 14 are arranged on the side surface, a mixed liquid outlet 15 is arranged at the bottom, the circulating carrier inlet 14 is connected with a circulating carrier inlet pipe 1, and the mixed liquid outlet 15 is connected with the reactor 6 through a liquid conveying pipe; the liquid supplementing inlet 13 is connected with a liquid supplementing tank 20 through a liquid supplementing pipe 19, and the liquid supplementing pipe 19 is provided with a booster pump 21 and a flow valve 22.
The fluid infusion inlet 13 and the circulating carrier inlet 14 are respectively positioned on two sides of the mixer 4.
The inside flow distribution plate 23 that still is provided with of blender 4, the flow distribution plate is located fluid infusion import 13 and circulation carrier import 14's inboard, flow distribution plate 23 is the V type, and the surface is provided with many diffluent recesses 24 towards the difference.
Example 2
In the apparatus described in example 1, a mixer may be added to each reactor inlet, the amount of the additional liquid added to the first mixer is the consumption of a single reactor multiplied by the number of reactors connected in series, and the addition may be completed in one step, and only the raw and auxiliary materials (acrylonitrile) may be added before the remaining reactors, which is advantageous for controlling the formation of the side reactants. See figure 4.
The prior process for producing adiponitrile is a process in which a plurality of reactors are connected in parallel, circulating carriers are respectively connected in parallel and enter one electrochemical reactor, after the serial process is adopted, the whole production line consists of a plurality of parallel serial reactors, after a plurality of electrochemical reactors are connected in series, after one electrochemical reactor, unreacted media in the first reactor can continue to react in the next reactor, and the one-way reaction efficiency is multiplied. Because the corrosion condition of the existing reactor for electrochemically synthesizing adiponitrile is still not effectively solved, the parallel production process can often cause the condition of reactor maintenance, and the production stop maintenance can be inevitable. This scheme of use just can keep apart the maintenance alone with the series reactor line of a certain trouble, need not the maintenance of stopping production comprehensively, great improvement operating efficiency and investment income, make the productivity effect maximize.
In the series process system, raw material addition can be divided into addition at the total inlet of each series reactor line, the addition amount is the consumption of a single reactor and is multiplied by the number of the series reactors, in order to ensure that the added raw materials can be uniformly mixed with a circulating carrier, a mixer can be arranged on a pipeline, and the uniformly mixed raw materials enter the reactors for reaction; the raw materials can be added into the reactor at the inlet of each reactor respectively, the amount of the supplemented liquid added into the first mixer is the consumption of a single reactor, the consumption is multiplied by the number of reactors connected in series, the one-time addition is completed, and only the raw and auxiliary materials (acrylonitrile) are added in front of the rest reactors, so that the generation of side reactants can be controlled.
The optimum number of reactors in series for the series process is 2-5, but is not limited to 2-5, and other numbers of reactors in series are within the scope of this patent.
And an online analyzer is arranged at the outlet of each group of reactors in series for electrochemically synthesizing adiponitrile, so that various components in the product can be monitored in real time, and the addition of the raw and auxiliary materials can be adjusted in time.
After the series connection process is adopted, the circulating ring carrier can react through a plurality of reactors, the one-way reaction efficiency is improved, and the production efficiency is improved.
The circulation quantity of the circulating carriers after being connected in series can be reduced by times, the diameter of a pipeline for conveying the circulating carriers, the number and the model of conveying equipment and a separator are greatly reduced or reduced, and the production investment cost is reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The system for producing adiponitrile through electrochemical series connection is characterized by comprising a circulating carrier inlet pipe (1), a circulating carrier outlet pipe (2) and a plurality of groups of reaction groups, wherein the reaction groups are arranged between the circulating carrier inlet pipe (1) and the circulating carrier outlet pipe (2) in parallel; each group of reaction groups comprises a liquid conveying pipe (3), a mixer (4) and a plurality of reactors (6) connected in series, the inlet end and the outlet end of the liquid conveying pipe (3) are respectively connected with a circulating carrier inlet pipe (1) and a circulating carrier outlet pipe (2), and the mixer (4) and the reactors (6) are sequentially arranged on the liquid conveying pipe (3) from the inlet end to the outlet end; a sampling device (5) is connected on the liquid conveying pipe (3) between the last reactor (6) of each group of reaction groups and the circulating carrier outlet pipe (2).
2. A system for the electrochemical series production of adiponitrile according to claim 1, wherein each set of said reaction set is further configured to include a plurality of mixers (4), one mixer (4) being provided at the inlet of each reactor (6).
3. The system for electrochemically producing adiponitrile in series according to claim 1, wherein the circulation carrier inlet pipe (1) and the circulation carrier outlet pipe (2) are respectively provided with a circulation carrier inlet valve (7) and a circulation carrier outlet valve (8), the liquid conveying pipe between the mixer (4) and the reactor (6) is provided with a liquid inlet valve (9), and the liquid conveying pipe between the last reactor (6) and the circulation carrier outlet pipe (2) of each group is provided with a liquid outlet valve (10).
4. A system for the electrochemical series production of adiponitrile according to claim 1, wherein each of said reaction groups comprises 1-10 reactors (6) in series.
5. A system for the electrochemical series production of adiponitrile according to claim 4, wherein each said reaction group comprises 2-5 reactors (6) in series.
6. A system for the electrochemical series production of adiponitrile according to claim 1, wherein said sampling device (5) is connected to a gas chromatograph of the 9790PLUS type.
7. A system for electrochemical series production of adiponitrile according to claim 1, wherein said mixer (4) is provided with a feedstock inlet (12), a make-up fluid inlet (13) and a recycle carrier inlet (14).
8. The system for electrochemically producing adiponitrile in series according to claim 1, wherein the mixer (4) is internally provided with a stirring device (11), the top of the mixer is provided with a raw material inlet (12), the side of the mixer is provided with a liquid supplementing inlet (13) and a circulating carrier inlet (14), the bottom of the mixer is provided with a mixed liquid outlet (15), the circulating carrier inlet (14) is connected with a circulating carrier inlet pipe (1), and the mixed liquid outlet (15) is connected with the reactor (6) through a liquid conveying pipe; fluid infusion import (13) connect fluid infusion jar (20) through fluid infusion pipe (19), be provided with booster pump (21) and flow valve (22) on fluid infusion pipe (19).
9. A system for electrochemical series production of adiponitrile according to claim 8, wherein said make-up fluid inlet (13) and recycle carrier inlet (14) are located on either side of mixer (4).
10. A system for electrochemical series production of adiponitrile according to claim 9, wherein said mixer (4) is further provided with a flow distribution plate (23) inside said fluid infusion inlet (13) and circulation carrier inlet (14), said flow distribution plate (23) is V-shaped and provided with a plurality of flow distribution grooves (24) facing in different directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396381.0U CN212152453U (en) | 2020-03-25 | 2020-03-25 | System for producing adiponitrile through electrochemical series connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396381.0U CN212152453U (en) | 2020-03-25 | 2020-03-25 | System for producing adiponitrile through electrochemical series connection |
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| Publication Number | Publication Date |
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| CN212152453U true CN212152453U (en) | 2020-12-15 |
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| CN202020396381.0U Active CN212152453U (en) | 2020-03-25 | 2020-03-25 | System for producing adiponitrile through electrochemical series connection |
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Denomination of utility model: A system for electrochemical series production of adiponitrile Effective date of registration: 20220804 Granted publication date: 20201215 Pledgee: Changzhi Tonghui Branch Equity Investment Partnership (Limited Partnership) Pledgor: Shanxi runheng Chemical Co.,Ltd. Registration number: Y2022980011968 |