CN214528776U - Improved integrated trans-1, 2-dichloroethylene preparation device - Google Patents
Improved integrated trans-1, 2-dichloroethylene preparation device Download PDFInfo
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- CN214528776U CN214528776U CN202120364488.1U CN202120364488U CN214528776U CN 214528776 U CN214528776 U CN 214528776U CN 202120364488 U CN202120364488 U CN 202120364488U CN 214528776 U CN214528776 U CN 214528776U
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Abstract
The utility model provides an improved generation integration trans-1, 2-dichloroethylene preparation facilities, including the synthetic tower, the regenerator, the mother liquor storage tank, regeneration storage tank, synthetic tower bottom gas phase entry is used for letting in acetylene gas, the export of mother liquor tank is connected to tower bottom liquid phase entry, synthetic tower top gas phase exit linkage is synthetic with the condenser, the top of the tower liquid phase entry of synthetic condenser for the synthesis, the export of synthetic condenser still connects the crude jar, the tower bottom gas phase entry of regenerator is used for letting in chlorine, regenerator tower top of the tower liquid phase entry linkage regeneration storage tank, regenerator condenser bottom liquid phase exit linkage mother liquor storage tank still sets up balanced pipeline, first condenser, the second condenser between regeneration storage tank and crude jar, still set up the tail gas pipeline between mother liquor storage tank and regeneration condenser, the utility model discloses a cyclic regeneration of mother liquor is used, and a dichloroethylene recovery channel is arranged for the mother liquor storage tank and the regeneration storage tank, so that the conversion efficiency is improved.
Description
Technical Field
The utility model relates to a trans-1, 2-dichloroethylene preparation technical field especially relates to an improved generation integration trans-1, 2-dichloroethylene preparation facilities.
Background
Trans-1, 2-dichloroethylene (hereinafter referred to as dichloroethylene) is a good solvent and chemical raw material, and is colorless and volatile liquid with slight pungent smell. The main application is as follows: the trans-1, 2-dichloroethylene is a novel environment-friendly organic solvent, and can be used as a solvent for paint, resin, wax, rubber and acetate fiber, a dry cleaning agent, an insecticide, a bactericide, an anesthetic, a low-temperature extractant, a refrigerant and the like. Due to the wide application of trans-1, 2-dichloroethylene, the preparation of the trans-1, 2-dichloroethylene also becomes a very concerned problem in the chemical industry.
In the existing equipment, the conversion rate of dichloroethylene is low due to the unreasonable equipment structure.
Disclosure of Invention
There is a need for an improved integrated trans-1, 2-dichloroethylene production plant.
An improved integrated trans-1, 2-dichloroethylene preparation device comprises a synthesis tower, a regeneration tower, a mother liquor storage tank and a regeneration storage tank, wherein the synthesis tower and the regeneration tower are packed towers, a gas phase inlet at the bottom of the synthesis tower is used for introducing acetylene gas, a liquid phase inlet at the bottom of the synthesis tower is connected with an outlet of the mother liquor tank, a gas phase outlet at the top of the synthesis tower is connected with a condenser for synthesis, an outlet of the condenser for synthesis is connected with a liquid phase inlet at the top of the synthesis tower through a gas-water separator, an outlet of the condenser for synthesis is also connected with a crude product tank through the gas-water separator so as to input a semi-finished product containing dichloroethylene into the crude product tank, a gas phase inlet at the bottom of the regeneration tower is used for introducing chlorine gas, a liquid phase inlet at the top of the regeneration tower is connected with the regeneration storage tank, a liquid phase outlet at the bottom of the regeneration tower is connected with the mother liquor storage tank, the regeneration tower is provided with the condenser for regeneration, and a gas phase outlet at the top of the regeneration tower is connected with the condenser for regeneration, the outlet of the regeneration condenser is connected with the crude product tank through a gas-water separator, a balance pipeline, a first condenser and a second condenser are further arranged between the regeneration storage tank and the crude product tank, the balance pipeline is connected between the inlet of the first condenser and the regeneration storage tank, the gas phase outlet of the first condenser is connected with the inlet of the second condenser, the liquid phase outlet of the first condenser and the liquid phase outlet of the second condenser are connected with the crude product tank, and a tail gas pipeline is further arranged between the mother liquor storage tank and the regeneration condenser.
Preferably, a preheater is further arranged between the synthesis tower and the mother liquor storage tank, the liquid phase inlet at the bottom of the tower is connected with the outlet of the preheater, and the inlet of the preheater is connected with the outlet of the mother liquor storage tank.
Preferably, a tower top temperature detector and a tower bottom temperature detector are arranged at the tower top and the tower bottom of the synthesis tower, a controller and an input control valve are arranged on a pipeline for inputting acetylene, a production control valve is arranged on a pipeline for connecting a condenser for synthesis and a crude product tank, and the controller is connected with the tower top temperature detector, the tower bottom temperature detector, the input control valve and the production control valve.
The utility model discloses a cyclic regeneration of mother liquor uses, and regeneration process and synthetic process are incessant continuous reaction process, and the synthetic reaction of dichloroethylene and the regeneration of mother liquor supply each other do not influence, and the process of whole production dichloroethylene need not to stop, be interrupted, and equipment structure optimizes, and production efficiency is high.
The scheme is that the mother liquor storage tank is provided with a tail gas pipeline for absorbing gas which is discharged into the mother liquor storage tank in the regeneration process of the regeneration tower and is entrained along the tail gas pipeline, the entrained gas is discharged into a regeneration condenser, the gas is condensed and then separated and sent into a tail gas treatment system, meanwhile, part of gas-phase dichloroethylene is also entrained in the gas and is discharged into the regeneration condenser along the tail gas pipeline, and the condensed gas enters a crude product tower.
This scheme still sets up balanced pipeline, first condenser, second condenser for the regeneration storage tank, and the synthetic tower exhaust mother liquor temperature is higher, and it is inside to smuggle partial gaseous dichloroethylene secretly, gets into inside the regeneration storage tank, causes the big problem of regeneration storage tank internal pressure easily, and this scheme emits gaseous dichloroethylene into first condenser and second condenser, and the dichloroethylene after being condensed gets into in the crude jar to improve the conversion of dichloroethylene in the synthetic tower.
Drawings
Fig. 1 is a schematic connection diagram of the present apparatus.
In the figure: the system comprises a synthesis tower 10, a condenser 11 for synthesis, a recovery control valve 111, a crude product tank 12, a preheater 13, a tower top temperature detector 14, a tower bottom temperature detector 15, a controller 16, an input control valve 17, a regeneration tower 20, a condenser 21 for regeneration, a mother liquor storage tank 30, a tail gas pipeline 31, a regeneration storage tank 40, a balance pipeline 41, a first condenser 42 and a second condenser 43.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Referring to fig. 1, the embodiment of the utility model provides an improved generation integration trans-1, 2-dichloroethylene preparation facilities, including synthetic tower 10, regenerator 20, mother liquor storage tank 30, regeneration storage tank 40, synthetic tower 10, regenerator 20 are the packed tower, synthetic tower 10 tower bottom gas phase entry is used for letting in acetylene gas, tower bottom liquid phase entry connects the export of mother liquor jar, synthetic tower 10 top gas phase export connects condenser 11 for the synthesis, the export of condenser 11 for the synthesis passes through the top liquid phase entry of gas-water separator connection synthetic tower 10, the export of condenser 11 for the synthesis still passes through gas-water separator connection crude tank 12 to import the semi-manufactured goods that contains dichloroethylene to in crude tank 12, the tower bottom gas phase entry of regenerator 20 is used for letting in chlorine, regenerator 20 top liquid phase entry connects regeneration storage tank 40, regenerator 20 tower bottom liquid phase exit connects mother liquor storage tank 30, the regeneration tower 20 is provided with a regeneration condenser 21, a gas phase outlet at the top of the regeneration tower 20 is connected with the regeneration condenser 21, an outlet of the regeneration condenser 21 is connected with the crude product tank 12 through a gas-water separator, a balance pipeline 41, a first condenser 42 and a second condenser 43 are further arranged between the regeneration storage tank 40 and the crude product tank 12, the balance pipeline 41 is connected between an inlet of the first condenser 42 and the regeneration storage tank 40, a gas phase outlet of the first condenser 42 is connected with an inlet of the second condenser 43, a liquid phase outlet of the first condenser 42 and a liquid phase outlet of the second condenser 43 are connected with the crude product tank 12, and a tail gas pipeline 31 is further arranged between the mother liquor storage tank 30 and the regeneration condenser 21.
The utility model discloses in, the acetylene is the material that preceding step preparation formed, as the raw materials of production dichloroethylene, get into the converter 10 with the catalyst mother liquor in the mother liquor storage tank 30, the two reaction generates the crude that contains dichloroethylene, the mother liquor of depriving a chloridion discharges into regeneration storage tank 40, liquid in the regeneration storage tank 40 is pumped to in the regeneration tower 20, regeneration tower 20 lets in chlorine, a chloridion in the chlorine is absorbed by the mother liquor that lacks chloridion, realize the regeneration of mother liquor, the mother liquor after the regeneration is stored in mother liquor storage tank 30, squeeze into converter 10 once more and use, there is some dichloroethylene still at the top of the tower of regeneration tower 20, in being regenerated with condenser 21 condensation reflux to crude tank 12, and then improve the conversion of the inside dichloroethylene of system, improve the yield of dichloroethylene in the crude tank 12. A part of dichloroethylene still exists at the top of the regeneration tower 20, and is condensed and refluxed to the crude product tank 12 by a regeneration condenser 21. The mother liquor is copper chloride solution with copper chloride content not lower than 98%, and the mother liquor with one chloride ion being deprived is cuprous chloride solution with cuprous chloride content not lower than 98%.
The utility model discloses a cyclic regeneration of mother liquor uses, and regeneration process and synthetic process are incessant continuous reaction process, and the synthetic reaction of dichloroethylene and the regeneration of mother liquor supply each other do not influence, and the process of whole production dichloroethylene need not to stop, be interrupted, and equipment structure optimizes, and production efficiency is high.
The scheme is that a tail gas pipeline 31 is arranged on the mother liquor storage tank 30 and is used for absorbing gas which is discharged into the mother liquor storage tank 30 in the regeneration process of the regeneration tower 20, the entrained gas is discharged into a regeneration condenser 21 along the tail gas pipeline 31, and the gas is condensed and then separated and sent into a tail gas treatment system.
This scheme still sets up balanced pipeline 41, first condenser 42, second condenser 43 for regeneration storage tank 40, the mother liquor temperature of discharging from the synthetic tower 10 like regeneration storage tank 40 is higher, and inside its part secretly carries partial gaseous dichloroethylene, gets into regeneration storage tank 40 inside, causes the big problem of regeneration storage tank 40 internal pressure easily, and this scheme discharges gaseous dichloroethylene into first condenser 42 and second condenser 43, and the dichloroethylene after the condensation gets into in crude jar 12 to improve the conversion of dichloroethylene in the synthetic tower 10. The first condenser 42 and the second condenser 43 adopt a series reinforcement mode, so that the substance which is not cooled in the first condenser is secondarily condensed by the second condenser, and the gas-phase ethylene dichloride is fully collected.
Further, a preheater 13 is arranged between the synthesis tower 10 and the mother liquor storage tank 30, the inlet of the liquid phase at the tower bottom is connected with the outlet of the preheater 13, and the inlet of the preheater 13 is connected with the outlet of the mother liquor storage tank 30.
According to the scheme, the mother liquor is preheated in advance before entering the synthesis tower 10, the preheating temperature is 88-93 ℃, the preheated mother liquor enters the synthesis tower 10, the required heat is less, the time point of the synthesis reaction of the mother liquor and acetylene gas can be advanced, the time required by the synthesis reaction is shortened, and the reaction efficiency is improved.
Further, a tower top temperature detector 14 and a tower bottom temperature detector 15 are arranged at both the tower top and the tower bottom of the synthesis tower 10, a controller 16 (of course, the controller 16 is not used for controlling the on-off of the acetylene input pipeline, but is used as a carrier for installing the controller 16) and an input control valve 17 are arranged on the pipeline for inputting acetylene, a recovery control valve 111 is arranged on the pipeline for connecting the synthesis condenser 11 and the crude product tank 12, and the controller 16 is connected with the tower top temperature detector 14, the tower bottom temperature detector 15, the input control valve 17 and the recovery control valve 111. The scheme forms an interlocking control system by a temperature controller 16 and a temperature detector, the temperature controller 16 adopts the existing equipment in the prior art, a tower top temperature detector 14 is used for detecting the temperature at the top of the synthesis tower 10, a tower bottom temperature detector 15 is used for detecting the temperature at the bottom of the synthesis tower 10, when the real-time temperature detected by the tower top temperature detector 14 is higher than the set value, which indicates that the content of high boiling point heavy components in the product produced at the tower top is higher, multiple times of reflux condensation separation are needed, the controller 16 controls the extraction control valve 111 to close and controls the input control valve 17 to close, otherwise, when the real-time temperature detected by the tower top temperature detector 14 is lower than the set value, which indicates that the content of dichloroethylene in the product produced at the tower top is higher, at this time, the controller 16 controls the extraction control valve 111 to be intermittently opened to extract the semi-finished product, and controls the input control valve 17 to be opened to input acetylene gas. The controller can be realized by adopting a switch circuit in the prior art.
The embodiment of the utility model provides a module or unit in the device can merge, divide and delete according to actual need.
The above disclosure is only illustrative of the preferred embodiments of the present invention, which should not be taken as limiting the scope of the invention, but rather the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that all or part of the above-described embodiments may be implemented and equivalents thereof may be made to the claims of the present invention while remaining within the scope of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. An improved generation integration trans-1, 2-dichloroethylene preparation facilities which characterized in that: the device comprises a synthetic tower, a regeneration tower, a mother liquor storage tank and a regeneration storage tank, wherein the synthetic tower and the regeneration tower are packed towers, a gas phase inlet at the bottom of the synthetic tower is used for introducing acetylene gas, a liquid phase inlet at the bottom of the synthetic tower is connected with an outlet of the mother liquor tank, a gas phase outlet at the top of the synthetic tower is connected with a condenser for synthesis, an outlet of the condenser for synthesis is connected with a liquid phase inlet at the top of the synthetic tower through a gas-water separator, an outlet of the condenser for synthesis is also connected with a crude product tank through the gas-water separator, a gas phase inlet at the bottom of the regeneration tower is used for introducing chlorine gas, a liquid phase inlet at the top of the regeneration tower is connected with the regeneration storage tank, a liquid phase outlet at the bottom of the regeneration tower is connected with the mother liquor storage tank, the regeneration tower is provided with a condenser for regeneration, an outlet of the condenser for regeneration is connected with the crude product tank through the gas-water separator, and a balance pipeline is arranged between the regeneration storage tank and the crude product tank, The system comprises a first condenser, a second condenser and a balance pipeline, wherein the balance pipeline is connected between an inlet of the first condenser and a regeneration storage tank, a gas phase outlet of the first condenser is connected with an inlet of the second condenser, a liquid phase outlet of the first condenser and a liquid phase outlet of the second condenser are connected with a crude product tank, and a tail gas pipeline is arranged between a mother liquor storage tank and the regeneration condenser.
2. An improved integrated trans-1, 2-dichloroethylene production unit according to claim 1, wherein: still set up the preheater between synthetic tower and mother liquor storage tank, the export of preheater is connected to the liquid phase entry at the bottom of the tower, the export of mother liquor storage tank is connected to the entry of preheater.
3. An improved integrated trans-1, 2-dichloroethylene production unit according to claim 2, wherein: the top and bottom of the synthetic tower are provided with a top temperature detector and a bottom temperature detector, a pipeline for inputting acetylene is provided with a controller and an input control valve, a pipeline for connecting the condenser for synthesis and the crude product tank is provided with a production control valve, and the controller is connected with the top temperature detector, the bottom temperature detector, the input control valve and the production control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364488.1U CN214528776U (en) | 2021-02-08 | 2021-02-08 | Improved integrated trans-1, 2-dichloroethylene preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364488.1U CN214528776U (en) | 2021-02-08 | 2021-02-08 | Improved integrated trans-1, 2-dichloroethylene preparation device |
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| CN214528776U true CN214528776U (en) | 2021-10-29 |
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| CN202120364488.1U Active CN214528776U (en) | 2021-02-08 | 2021-02-08 | Improved integrated trans-1, 2-dichloroethylene preparation device |
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- 2021-02-08 CN CN202120364488.1U patent/CN214528776U/en active Active
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