CN220695866U - Reduced pressure distillation system convenient to adjust liquid flow - Google Patents
Reduced pressure distillation system convenient to adjust liquid flow Download PDFInfo
- Publication number
- CN220695866U CN220695866U CN202321028841.4U CN202321028841U CN220695866U CN 220695866 U CN220695866 U CN 220695866U CN 202321028841 U CN202321028841 U CN 202321028841U CN 220695866 U CN220695866 U CN 220695866U
- Authority
- CN
- China
- Prior art keywords
- liquid
- liquid outlet
- condenser
- communicated
- cold trap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 134
- 238000004821 distillation Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 29
- 238000010992 reflux Methods 0.000 claims abstract description 25
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 238000005292 vacuum distillation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000012797 qualification Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000009835 boiling Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The application provides a reduced pressure distillation system convenient for regulating liquid flow, wherein a top gas outlet of a rectifying tower is communicated with a gas inlet of a condenser, a gas outlet of the condenser is communicated with a gas inlet of a cold trap, and a gas outlet of the cold trap is communicated with a gas inlet of a vacuum pump; the liquid outlet of the condenser is respectively communicated with the liquid inlet of the top reflux liquid of the rectifying tower and the liquid inlet of the top liquid outlet storage tank through a tee joint; a pipeline for communicating the liquid outlet of the condenser with the liquid inlet of the top reflux liquid of the rectifying tower is provided with a top reflux liquid flowmeter; a tower top liquid outlet flowmeter and a tower top liquid outlet regulating valve are sequentially arranged on a pipeline which is communicated with a liquid outlet of the condenser and a liquid inlet of the tower top liquid outlet storage tank in the direction from upstream to downstream; the liquid outlet of the cold trap is communicated with the liquid outlet of the tower top liquid outlet regulating valve; after the liquid outlet flow of the cold trap is controlled, the production process is convenient to regulate and control, and the qualification rate of products is improved; the distilled product can be purified to obtain a qualified product at one time, the one-time distillation qualification can be realized, and the energy consumption and the labor are reduced.
Description
Technical Field
The utility model relates to the technical field of reduced pressure distillation systems, in particular to a reduced pressure distillation system convenient for regulating liquid outlet flow.
Background
Reduced pressure distillation (also known as vacuum distillation) is an important method for separating and purifying compounds, and is particularly suitable for separating and purifying high boiling point substances and those compounds which have been thermally decomposed, oxidized or polymerized without reaching the boiling point in atmospheric distillation. The reduced pressure distillation system comprises a rectifying tower, a reboiler, a condenser and the like, wherein steam led out from the top of the tower is condensed, a part of condensate is used as reflux liquid and returns to the rectifying tower from the top of the tower, and the rest distillate is the tower top product; the liquid led out from the bottom of the tower is gasified by a reboiler, the steam rises along the tower, and the rest liquid is used as a tower bottom product; the gas-liquid reflux forms a countercurrent contact gas-liquid two-phase, thereby obtaining relatively pure single-component products at the two ends of the tower respectively.
In a reduced pressure distillation system, the cold trap serves to trap low boiling point materials that are not condensed by a condenser in the distillation apparatus, preventing them from entering a subsequent drying system or vacuum pump. The common refrigerant comprises brine containing ice, liquid nitrogen, glycol and the like, and the temperature is set to be between normal temperature and minus 50 ℃.
The traditional technology only has cold trap control discharging, and when the cooling capacity of the cold trap reaches the maximum, the products are not fractionated to obtain qualified products. The qualified products are only produced by a method of tower top discharge or secondary distillation, the control difficulty of the traditional process of tower top discharge is high, the numerical value is increased or decreased due to the influence of environment, pipeline vibration and the like, the yield of the qualified products is influenced by the fact that the useful components are carried out by the tower top materials due to the increase of the numerical value, and the product is disqualified due to the decrease of the numerical value.
Disclosure of Invention
The utility model aims to provide a reduced pressure distillation system which is convenient for regulating the flow of liquid outlet.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
the vacuum distillation system comprises a rectifying tower, a condenser, a cold trap, a tower top liquid outlet storage tank and a vacuum pump;
the top gas outlet of the rectifying tower is communicated with the gas inlet of the condenser, the gas outlet of the condenser is communicated with the gas inlet of the cold trap through a pipeline, and the gas outlet of the cold trap is communicated with the gas inlet of the vacuum pump through a pipeline;
the liquid outlet of the condenser is respectively communicated with the liquid inlet of the top reflux liquid of the rectifying tower through a tee joint and the liquid inlet of the top liquid outlet storage tank;
a pipeline which is communicated with the liquid outlet of the condenser and the liquid inlet of the top reflux liquid of the rectifying tower is provided with a top reflux liquid flowmeter;
a tower top liquid outlet flowmeter and a tower top liquid outlet regulating valve are sequentially arranged on a pipeline which is communicated with a liquid outlet of the condenser and a liquid inlet of the tower top liquid outlet storage tank in the direction from upstream to downstream;
and a liquid outlet of the cold trap is communicated with a liquid outlet of the tower top liquid outlet regulating valve through a pipeline.
Preferably, a pipeline for communicating the liquid outlet of the condenser with the liquid inlet of the top reflux liquid of the rectifying tower is also provided with a top reflux liquid regulating valve.
Preferably, a cold trap liquid outlet flowmeter and a cold trap liquid outlet regulating valve are sequentially arranged on a pipeline which is communicated with the liquid outlet of the cold trap and the liquid outlet of the tower top liquid outlet regulating valve in the direction from upstream to downstream.
Preferably, the tower top liquid outlet regulating valve, the tower top reflux liquid regulating valve and the cold trap liquid outlet regulating valve are all electric regulating butterfly valves.
The application achieves the following beneficial technical effects:
the application particularly relates to cold trap liquid flow control of a distillation section, after the cold trap liquid flow control, the production process is convenient to regulate and control, and the qualification rate of the product of the distillation section is improved;
the distilled product can be purified to obtain a qualified product at one time, the one-time distillation qualification can be realized, and the energy consumption and the labor are reduced;
the total amount of materials required by the cold trap part can be calculated through an assay, and after the cold trap liquid reaches the maximum amount in the production process, the amount of the excessive materials is required to be controlled by controlling the overhead liquid through controlling an overhead liquid regulating valve, and the amount of the overhead liquid is realized by observing an overhead liquid flowmeter;
in the production process, the amount required to be discharged from the tower top is calculated through an assay result, and the amount of the material is a certain amount and cannot be excessively large or small; the liquid flow rate of the part of the liquid flow can be better regulated and controlled by the liquid flow meter and the liquid flow regulating valve at the top of the tower, so that the product quality is improved, and the yield of the product is ensured.
Drawings
FIG. 1 is a schematic diagram of the working principle of a reduced pressure distillation system for facilitating the adjustment of the flow rate of effluent according to an embodiment of the present utility model;
in the figure: 1 a rectifying tower, 2 a condenser, 3 a cold trap, 4 a tower top liquid outlet storage tank and 5 a vacuum pump;
601 overhead reflux flowmeter, 602 overhead reflux regulator valve;
701 tower top liquid outlet flowmeter, 702 tower top liquid outlet regulating valve;
801 cold trap outlet flow meter, 802 cold trap outlet regulating valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center," "axial," "radial," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.
Referring to fig. 1, the application provides a reduced pressure distillation system convenient for regulating the flow of liquid out, which comprises a rectifying tower 1, a condenser 2, a cold trap 3, a tower top liquid out storage tank 4 and a vacuum pump 5;
the top gas outlet of the rectifying tower 1 is communicated with the gas inlet of the condenser 2, the gas outlet of the condenser 2 is communicated with the gas inlet of the cold trap 3 through a pipeline, and the gas outlet of the cold trap 3 is communicated with the gas inlet of the vacuum pump 5 through a pipeline;
the liquid outlet of the condenser 2 is respectively communicated with the liquid inlet of the top reflux liquid of the rectifying tower 1 and the liquid inlet of the top liquid outlet storage tank 4 through a tee joint;
a pipeline for communicating the liquid outlet of the condenser 2 with the liquid inlet of the top reflux liquid of the rectifying tower 1 is provided with a top reflux liquid flowmeter 601;
a tower top liquid outlet flowmeter 701 and a tower top liquid outlet regulating valve 702 are sequentially arranged on a pipeline which is communicated with a liquid outlet of the condenser 2 and a liquid inlet of the tower top liquid outlet storage tank 4 from upstream to downstream;
the liquid outlet of the cold trap 3 is communicated with the liquid outlet of the tower top liquid outlet regulating valve 702 through a pipeline.
In one embodiment of the present application, an overhead reflux regulating valve 602 is further disposed on a pipeline that connects the liquid outlet of the condenser 2 and the overhead reflux liquid inlet of the rectifying tower 1.
In one embodiment of the present application, a cold trap liquid outlet flowmeter 801 and a cold trap liquid outlet regulating valve 802 are sequentially disposed on a pipeline that connects the liquid outlet of the cold trap 3 and the liquid outlet of the top liquid outlet regulating valve 702 in a direction from upstream to downstream.
In one embodiment of the present application, the overhead liquid control valve 702, the overhead reflux liquid control valve 602, and the cold trap liquid control valve 802 are all electrically operated butterfly valves.
In the application, during normal production, gas-phase materials which are not cooled by a condenser 2 (preferably a vertical head condenser) are cooled by a cold trap 3 and become liquid phases to flow into a tower top liquid outlet storage tank 4;
the condenser 2 is influenced by the cooling water therein, and reaches the upper limit of the temperature, and when the upper limit is reached, the gas-phase material discharged from the condenser 2 also reaches the upper limit;
in actual production, the situation that more materials need to be discharged from the condenser 2 can be realized through the tower top liquid outlet regulating valve 702 and the tower top liquid outlet flowmeter 701, the material fractionation amount is improved, and the product qualification rate is increased.
The method and the device which are not described in detail in the utility model are all the prior art and are not described in detail.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, which are intended to be merely illustrative of the methods of the present utility model and their core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (4)
1. The vacuum distillation system is characterized by comprising a rectifying tower, a condenser, a cold trap, a tower top liquid outlet storage tank and a vacuum pump;
the top gas outlet of the rectifying tower is communicated with the gas inlet of the condenser, the gas outlet of the condenser is communicated with the gas inlet of the cold trap through a pipeline, and the gas outlet of the cold trap is communicated with the gas inlet of the vacuum pump through a pipeline;
the liquid outlet of the condenser is respectively communicated with the liquid inlet of the top reflux liquid of the rectifying tower through a tee joint and the liquid inlet of the top liquid outlet storage tank;
a pipeline which is communicated with the liquid outlet of the condenser and the liquid inlet of the top reflux liquid of the rectifying tower is provided with a top reflux liquid flowmeter;
a tower top liquid outlet flowmeter and a tower top liquid outlet regulating valve are sequentially arranged on a pipeline which is communicated with a liquid outlet of the condenser and a liquid inlet of the tower top liquid outlet storage tank in the direction from upstream to downstream;
and a liquid outlet of the cold trap is communicated with a liquid outlet of the tower top liquid outlet regulating valve through a pipeline.
2. The reduced pressure distillation system for facilitating the regulation of a liquid outlet flow according to claim 1, wherein a top reflux regulating valve is further provided on a pipe connecting the liquid outlet of the condenser with the top reflux inlet of the rectifying column.
3. The reduced pressure distillation system for facilitating the adjustment of a liquid outlet flow according to claim 2, wherein a cold trap liquid outlet flow meter and a cold trap liquid outlet adjusting valve are sequentially arranged on a pipeline communicating a liquid outlet of the cold trap and a liquid outlet of the top liquid outlet adjusting valve in a direction from upstream to downstream.
4. A reduced pressure distillation system according to claim 3 wherein the overhead liquid control valve, overhead reflux liquid control valve and cold trap liquid control valve are all electrically operated butterfly valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321028841.4U CN220695866U (en) | 2023-04-28 | 2023-04-28 | Reduced pressure distillation system convenient to adjust liquid flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321028841.4U CN220695866U (en) | 2023-04-28 | 2023-04-28 | Reduced pressure distillation system convenient to adjust liquid flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220695866U true CN220695866U (en) | 2024-04-02 |
Family
ID=90447813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321028841.4U Active CN220695866U (en) | 2023-04-28 | 2023-04-28 | Reduced pressure distillation system convenient to adjust liquid flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220695866U (en) |
-
2023
- 2023-04-28 CN CN202321028841.4U patent/CN220695866U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020155571A1 (en) | Separation and recycle system for water-containing organic waste liquid and organic solvent, and recycle method | |
| FI94218C (en) | Distillation plant for the production of hydrogen peroxide | |
| US2690060A (en) | Fractional distillation | |
| WO2021047393A1 (en) | Rectification device and rectification method for oxo synthesis of acetic acid | |
| CN201094869Y (en) | Multipurpose internal reflux distillation device | |
| CN220695866U (en) | Reduced pressure distillation system convenient to adjust liquid flow | |
| CN210057418U (en) | High-concentration evaporation separation system for organic matter aqueous solution | |
| CN106916050A (en) | For the piece-rate system and its application method of MAS | |
| CN206666416U (en) | Piece-rate system for low carbon mixed alcohol | |
| CN112007371B (en) | Carbon dioxide purification device and feeding method thereof | |
| CN114146441A (en) | Reflux automatic control device and method for intermittent vacuum rectification of high-purity alpha-thiophene derivative | |
| CN213924578U (en) | Dichloromethane recovery device in production process of wet lithium battery diaphragm | |
| CN112569618B (en) | Reboiler system and steam feeding method thereof | |
| CN207429733U (en) | A kind of rectifying device for being used to prepare watermelon ketone | |
| RU2534351C1 (en) | Method for automatic control of alcohol column of distiller | |
| CN208927622U (en) | Carbendazim synthesizes continuous Double-Tower Structure in rectification process | |
| CN208308431U (en) | A kind of VCM purification hydrochloric acid full stripping device | |
| JPS59196833A (en) | Method and apparatus for producing anhydrous methanol | |
| CN211383861U (en) | Two-stage series rectifying tower | |
| CN205796590U (en) | A kind of lateral line discharging extracting rectifying and solvent recovery unit | |
| RU2234356C2 (en) | Rectifying tower for separation of three-component mixture | |
| CN219110867U (en) | Differential pressure type thermal coupling rectifying tower temperature automatic control system | |
| CN219756773U (en) | Device for purifying argon gas by air separation rectifying tower | |
| CN212594074U (en) | CO2 split tower top condenser structure | |
| CN218011152U (en) | Novel dynamic control device for dividing wall rectifying tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |