CN212998418U - Low boiling point solvent regeneration and recovery device - Google Patents
Low boiling point solvent regeneration and recovery device Download PDFInfo
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- CN212998418U CN212998418U CN202021209492.2U CN202021209492U CN212998418U CN 212998418 U CN212998418 U CN 212998418U CN 202021209492 U CN202021209492 U CN 202021209492U CN 212998418 U CN212998418 U CN 212998418U
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Abstract
The utility model relates to a low boiling solvent regeneration and recovery unit belongs to chemical industry environmental protection technical field. The utility model discloses a low boiling point solvent regeneration and recovery unit, including knockout drum, caustic wash tower, lye tank, lye delivery pump, lye circulating pump, condenser, vacuum pump and solvent recovery jar; the outer part of the separating tank is provided with a jacket layer; knockout drum one end is connected with the solvent inlet pipe, and the knockout drum other end is connected with the caustic wash tower pan feeding mouth through first pipeline, and the discharge gate of caustic wash tower passes through the second pipeline and links to each other with knockout drum jacket layer, and knockout drum jacket layer passes through the third pipeline to be connected with the entry end of condenser, and the output and the vacuum pump entry end of condenser are connected, and the exit end and the solvent recovery jar of vacuum pump are connected. The utility model has the advantages of scientific and reasonable design, easy operation is convenient, energy saving and consumption reduction, the cost is reduced, safety ring protects.
Description
Technical Field
The utility model relates to a low boiling solvent regeneration and recovery unit belongs to chemical industry environmental protection technical field.
Background
In chemical production, the usage amount of the organic solvent is very large, and the solvent recovery technology is an important measure for saving energy, reducing consumption, protecting environment and reducing cost. The solvent recovery technology can effectively reduce the formation of acid rain and acid smoke and reduce the harm of the chlorofluoroalkane volatilized by some organic matters to the atmospheric ozone layer. The organic solvent in the waste gas is recycled, so that the pollution can be reduced, the utilization efficiency of resources can be improved, the production cost of enterprises is reduced, the market benefit is improved, and two purposes are achieved. Therefore, it is very important to recover organic solvent efficiently in chemical production. At present, the low boiling point solvent recovery equipment commonly used in the market is mainly applied to Freon recovery of air conditioners and storage tanks, and less low boiling point solvent recovery and reutilization in chemical production is involved.
The low-boiling-point solvent recovery mainly utilizes the boiling point difference of the solvent and impurities to realize separation, the solvent recovery process consumes a large amount of energy through twice phase changes of vaporization and liquefaction, and the recovery cost is greatly increased. In addition, the solvent containing various harmful components in the chemical plant has a problem of environmental pollution if the harmful components in the solvent cannot be separated. However, the low-boiling point solvent recovery process has two phase changes of vaporization and liquefaction, so that a novel recovery system is designed to solve the problems of difficult solvent recovery, large energy consumption and environmental pollution existing in the existing recovery system, and the method has great practical significance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low boiling solvent regeneration and recovery unit, its design scientific and reasonable, easy operation is convenient, energy saving and consumption reduction, the cost is reduced, safety ring protects.
The utility model discloses a low boiling point solvent regeneration and recovery unit, including knockout drum, caustic wash tower, lye tank, lye delivery pump, lye circulating pump, condenser, vacuum pump and solvent recovery jar; the outer part of the separating tank is provided with a jacket layer; knockout drum one end is connected with the solvent inlet pipe, and the knockout drum other end is connected with the caustic wash tower pan feeding mouth through first pipeline, and the discharge gate of caustic wash tower passes through the second pipeline and links to each other with knockout drum jacket layer, and knockout drum jacket layer passes through the third pipeline to be connected with the entry end of condenser, and the output and the vacuum pump entry end of condenser are connected, and the exit end and the solvent recovery jar of vacuum pump are connected.
Preferably, the top of the separation tank is respectively provided with a pressure transmitter and a temperature sensor for displaying and alarming the temperature and the pressure in the tank.
Preferably, the bottom end of the alkaline tower is connected with two or more alkaline circulating pumps, and the alkaline circulating pumps are connected with the top end of the alkaline tower through pipelines.
Preferably, a flow meter is arranged on a pipeline between the alkali liquor conveying pump and the alkali wash tower.
Preferably, the outer part of the jacket layer of the separation tank is coated with a heat insulating material. The heat insulating material is preferably polyurethane.
Preferably, the alkaline tower is respectively provided with a thermometer, a pressure gauge, a liquid level meter and a pH meter. The temperature gauge and the pressure gauge are arranged at the top of the alkaline tower, the liquid level gauge and the pH gauge are arranged at the lower part of the alkaline tower, and the hand valve is arranged in front of the pH gauge, so that the alkaline tower is easy to overhaul and replace.
Preferably, the top of the solvent recovery tank is respectively provided with a temperature sensor, a pressure transmitter and a safety valve.
The separation tank not only provides a space for solvent vaporization and separation, but also is a place for solvent volatilization and temperature reduction cross heat exchange.
The inlet end of the vacuum pump is communicated with the separation tank through a pipeline, so that the internal pressure of the separation tank is less than atmospheric pressure, the boiling point of the solvent is reduced, and the solvent can be vaporized at a lower temperature. The energy required for vaporizing the liquid phase solvent in the separation tank is provided by the gas phase solvent in the jacket layer of the separation tank, and the temperature of the gas phase solvent in the jacket layer is reduced.
The outlet end of the vacuum pump is connected with the solvent recovery tank, so that the internal pressure of the solvent recovery tank is greater than atmospheric pressure, and the solvent is easier to liquefy and recover.
The low boiling point liquid phase solvent in chemical production begins to vaporize after entering the separation tank, the heat absorbed by the vaporization of the solvent is provided by the gas phase solvent in the jacket layer, and the gas phase solvent enters the alkali washing system from the top of the separation tank. After the solvent is completely volatilized, the liquid phase impurities in the separation tank are discharged from the bottom purge valve. The alkali washing system is used for removing acid substances in the solvent and mainly comprises an alkali washing tower, an alkali liquor tank, an alkali liquor circulating pump and an alkali liquor conveying pump. The outlet of the alkaline tower is connected with a dryer.
The gas phase solvent enters a jacket layer of the separation tank after being dewatered by the dryer to exchange heat with the solvent in the separation tank, is liquefied by a condenser, and is stored in a solvent recovery tank by a vacuum pump.
Compared with the prior art, the utility model, following beneficial effect has:
(1) the utility model adopts a special cross heat exchange mode, utilizes the heat release of the gas phase solvent liquefaction and the heat absorption of the liquid phase solvent vaporization to exchange heat, and effectively reduces the energy consumption;
(2) the utility model has the advantages that the separating tank is connected with the vacuum pump device, which can reduce the pressure intensity of the separating tank, so that the liquid phase solvent in the separating tank can be vaporized at a lower temperature, and the energy consumption of the solvent during vaporization is reduced;
(3) the utility model provides an alkaline washing tower can adsorb the acid harmful component in the gaseous phase solvent, purifies, safety ring protects to the gaseous phase solvent.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. a solvent feed pipe; 2. a separation tank; 3. a first pipeline; 4. an alkaline washing tower; 5. a second pipeline; 6. an alkali liquor tank; 7. an alkali liquor delivery pump; 8. an alkali liquor circulating pump; 9. a third pipeline; 10. a condenser; 11. a vacuum pump; 12. and a solvent recovery tank.
Detailed Description
The present invention is further described with reference to the following examples, which are not intended to limit the practice of the invention.
Example 1
As shown in fig. 1, the low boiling point solvent regeneration and recovery device comprises a separation tank 2, an alkaline tower 4, an alkaline tank 6, an alkaline delivery pump 7, an alkaline circulation pump 8, a condenser 10, a vacuum pump 11 and a solvent recovery tank 12; the outer part of the separation tank 2 is provided with a jacket layer; 2 one ends of knockout drum are connected with solvent inlet pipe 1, and the 2 other ends of knockout drum are connected with 4 pan feeding mouths of caustic wash tower through first pipeline 3, and the discharge gate of caustic wash tower 4 passes through second pipeline 5 and 2 cover layers of jacket of knockout drum and links to each other, and 2 cover layers of jacket of knockout drum are connected with the entry end of condenser 10 through third pipeline 9, and the output and the vacuum pump 11 entry end of condenser 10 are connected, and the exit end and the solvent recovery jar 12 of vacuum pump 11 are connected.
And a pressure transmitter and a temperature sensor are respectively arranged at the top of the separation tank 2.
The bottom end of the alkaline tower 4 is connected with two or more alkaline circulating pumps 8, and the alkaline circulating pumps 8 are connected with the top end of the alkaline tower 4 through pipelines.
And a flow meter is arranged on a pipeline between the alkali liquor delivery pump 7 and the alkali wash tower 4.
And a heat insulating material is coated outside the jacket layer of the separation tank 2.
And the alkaline tower 4 is respectively provided with a thermometer, a pressure gauge, a liquid level meter and a pH meter.
The top of the solvent recovery tank 12 is respectively provided with a temperature sensor, a pressure transmitter and a safety valve.
And (3) allowing the liquid phase solvent to be treated to flow into the separation tank 2 from a feed inlet at the top of the separation tank 2 through a solvent feed pipe 1, opening a vacuum pump 11 and an alkali liquor circulating pump 8, reducing the pressure in the separation tank 2, starting vaporization of the liquid phase solvent, and allowing the vaporized solvent to enter the bottom of the alkaline tower 4 from an exhaust outlet at the top of the separation tank 2. The bottom of the alkaline tower 4 is connected with the inlet of an alkaline circulating pump 8, the outlet of the alkaline circulating pump 8 is connected with the top of the alkaline tower 4, and the gas phase solvent and the alkaline liquor in the alkaline tower 4 are contacted and transferred in a countercurrent mode. The gas phase solvent enters a jacket of a separation tank 5 from the top of an alkaline tower 4, the liquid phase solvent in the separation tank 2 and the gas phase solvent in the jacket layer of the separation tank 2 exchange heat, the liquid phase solvent in the separation tank 2 absorbs heat and is vaporized, and the temperature of the gas phase solvent in the jacket layer is reduced. The jacket layer of the separation tank 2 is connected with the inlet of a condenser 10, and the gaseous phase solvent is continuously cooled by the condenser 10 after being cooled. An outlet of the condenser 10 is connected with the top of the solvent recovery tank 12, the cooled gas-phase solvent is liquefied by a vacuum pump 11 and finally enters the solvent recovery tank 12 for storage, and the outside of the solvent recovery tank 12 is coated with a cold insulation material. The residual liquid level in the separation tank 2 is discharged by a discharge valve at the bottom of the separation tank 2.
The separation tank 2 provides a space for vaporizing the liquid phase solvent, and the heat required by vaporization is provided by the vapor phase solvent in the jacket layer; the alkali wash tower 4, the alkali liquor tank 6, the alkali liquor delivery pump 7 and the alkali liquor circulating pump 8 form a solvent purification device for removing acidic impurities in the solvent; the separation tank 2, the condenser 10, the vacuum pump 11 and the solvent recovery tank 12 form a solvent recovery device, a jacket layer of the separation tank 2 and the condenser 10 are used for cooling the solvent, and the vacuum pump 11 is used for pressurizing and liquefying the solvent; the solvent recovery tank 12 is used to store the liquefied solvent.
The utility model is used for the place of low boiling point solvent regeneration and recovery in the chemical production process. The device is suitable for, but not limited to, the following refrigerants R22, R-134a, R-124, R-141b, R-142b and R-402A, R-408A, R-409A, R-12. The technical field technical personnel are in the utility model discloses impartial change and the improvement that the implementation within range was made all belong to the utility model discloses the patent covers the within range.
Claims (7)
1. A low boiling point solvent regeneration and recovery unit which characterized in that: comprises a separation tank (2), an alkaline tower (4), an alkaline tank (6), an alkaline delivery pump (7), an alkaline circulating pump (8), a condenser (10), a vacuum pump (11) and a solvent recovery tank (12); the outer part of the separating tank (2) is provided with a jacket layer; knockout drum (2) one end is connected with solvent inlet pipe (1), knockout drum (2) other end is connected with alkaline tower (4) pan feeding mouth through first pipeline (3), the discharge gate of alkaline tower (4) presss from both sides the jacket layer intercommunication through second pipeline (5) and knockout drum (2), knockout drum (2) presss from both sides the jacket layer and is connected with the entry end of condenser (10) through third pipeline (9), the output and the vacuum pump (11) entry end of condenser (10) are connected, the exit end and the solvent recovery jar (12) of vacuum pump (11) are connected.
2. The low boiling point solvent regeneration and recovery apparatus of claim 1, wherein: the top of the separating tank (2) is respectively provided with a pressure transmitter and a temperature sensor.
3. The low boiling point solvent regeneration and recovery apparatus of claim 1, wherein: the bottom end of the alkaline tower (4) is connected with two or more alkaline circulating pumps (8), and the alkaline circulating pumps (8) are connected with the top end of the alkaline tower (4) through pipelines.
4. The low boiling point solvent regeneration and recovery apparatus of claim 1, wherein: a flow meter is arranged on a pipeline between the alkali liquor delivery pump (7) and the alkali washing tower (4).
5. The low boiling point solvent regeneration and recovery apparatus of claim 1, wherein: the outer part of the jacket layer of the separating tank (2) is coated with heat insulating material.
6. The low boiling point solvent regeneration and recovery apparatus of claim 1, wherein: the alkaline washing tower (4) is respectively provided with a thermometer, a pressure gauge, a liquid level meter and a pH meter.
7. The low boiling point solvent regeneration and recovery apparatus of claim 1, wherein: the top of the solvent recovery tank (12) is respectively provided with a temperature sensor, a pressure transmitter and a safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021209492.2U CN212998418U (en) | 2020-06-24 | 2020-06-24 | Low boiling point solvent regeneration and recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021209492.2U CN212998418U (en) | 2020-06-24 | 2020-06-24 | Low boiling point solvent regeneration and recovery device |
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| CN212998418U true CN212998418U (en) | 2021-04-20 |
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| CN202021209492.2U Active CN212998418U (en) | 2020-06-24 | 2020-06-24 | Low boiling point solvent regeneration and recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951095A (en) * | 2022-04-11 | 2022-08-30 | 中国电子科技集团公司第三十八研究所 | Automatic cleaning method for digital array module |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951095A (en) * | 2022-04-11 | 2022-08-30 | 中国电子科技集团公司第三十八研究所 | Automatic cleaning method for digital array module |
| CN114951095B (en) * | 2022-04-11 | 2023-04-18 | 中国电子科技集团公司第三十八研究所 | Automatic cleaning method for digital array module |
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