CN211752581U - Stable molecular distillation feed arrangement - Google Patents
Stable molecular distillation feed arrangement Download PDFInfo
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- CN211752581U CN211752581U CN202020167175.2U CN202020167175U CN211752581U CN 211752581 U CN211752581 U CN 211752581U CN 202020167175 U CN202020167175 U CN 202020167175U CN 211752581 U CN211752581 U CN 211752581U
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Abstract
The utility model relates to a stable molecular distillation feed arrangement, molecular distillation feed arrangement includes open liquid storage pot, the totally enclosed liquid storage pot of cover and controlling means, open liquid storage pot passes through the feed pump and the feed liquor pipeline connects the totally enclosed liquid storage pot, the discharge gate of the totally enclosed liquid storage pot passes through the feed inlet of liquid outlet pipe connection molecular distillation ware, the vacuum extraction opening of the totally enclosed liquid storage pot passes through the evacuation equipment of evacuation pipe connection molecular distillation ware; the control device comprises a liquid level probe, a vacuum probe and a temperature probe which are arranged in the fully-sealed liquid storage tank, and electric ball valves which are respectively arranged in a liquid inlet pipeline, a liquid outlet pipeline and a vacuumizing pipeline, and the control device is used for carrying out automatic stable control on the molecular distillation feeding device. The utility model discloses can provide long-time stable efficient feeding for the molecular distillation of heat sensitivity and corrosive materials.
Description
Technical Field
The utility model relates to a molecular distillation purification equipment, especially a stable molecular distillation feed arrangement.
Background
In the general molecular distillation process, the vacuum feeding pump for feeding has a complex mechanical structure, a pump body is easy to corrode for purifying corrosive materials, the stability of the pump is poor after long-time use, and the equipment maintenance cost is high. For heat-sensitive materials, the temperature of the materials needs to be stably controlled during the feeding process of the molecular distillation apparatus, so that a molecular distillation feeding device which is beneficial to the stable feeding of the heat-sensitive and/or corrosive materials needs to be developed.
Chinese utility model patent CN201320449695.2 discloses an draw workshop automatic feed device, including the head tank to and connect the storage tank on the head tank, head tank and storage tank pass through the pipe connection, and the storage tank bottom is equipped with pressure and send the ware of becoming, be equipped with feed valve and charge pump on the pipeline, install automatic control system on the charge pump, the automatic control system other end is connected on pressure sends the ware of becoming. The utility model discloses a can send the signal of becoming the ware through the pressure that automatic control system read storage tank bottoms portion, realize autoloading. However, the utility model is suitable for the field of drug extraction, and does not consider the corrosivity and the heat sensitivity of materials.
In summary, the feeding device for molecular distillation provided by the prior art still has the disadvantage and disadvantage of poor stability for heat-sensitive materials and/or corrosive materials.
SUMMERY OF THE UTILITY MODEL
In order to overcome the shortcoming and not enough of prior art, the utility model provides a stable molecular distillation feed arrangement can be applied to the molecular distillation of heat sensitivity and corrosive materials feeding, the molecular distillation of specially adapted similar lactic acid.
The stable molecular distillation feeding device comprises an open type liquid storage tank, a totally-sealed liquid storage tank with a jacket and a control device, wherein the open type liquid storage tank is connected with the totally-sealed liquid storage tank through a feed pump and a liquid inlet pipeline, a discharge port of the totally-sealed liquid storage tank is connected with a feed port of a molecular distiller through a liquid outlet pipeline, and a vacuum pumping port of the totally-sealed liquid storage tank is connected with a vacuum pumping device of the molecular distiller through a vacuum pumping pipeline; the control device comprises a liquid level probe, a vacuum probe and a temperature probe which are arranged in the fully-sealed liquid storage tank, and electric ball valves which are respectively arranged in a liquid inlet pipeline, a liquid outlet pipeline and a vacuumizing pipeline, and the control device is used for carrying out automatic stable control on the molecular distillation feeding device.
The fully-sealed liquid storage tank comprises a tank body, a tank cover and a jacket, wherein the tank body is connected with the tank cover through a sealing flange, a discharge hole is formed in the bottom of the tank body and is used for being connected with the liquid outlet pipeline, and a feed hole is formed in the upper portion of the side wall of the tank body and is used for being connected with the liquid inlet pipeline; the jacket is arranged outside the tank body, a heating medium inlet is formed in the middle upper portion of the jacket and connected with a heating medium input pipeline, and a heating medium outlet is formed in the bottom of the jacket and connected with a heating medium output pipeline.
The upper part of the side wall of the tank body is provided with a high liquid level probe, and the lower part of the side wall of the tank body is provided with a low liquid level probe and a temperature probe respectively. Further, the high liquid level probe is arranged 20-25cm lower than the flange at the top of the tank body, and the low liquid level probe is arranged 10-15cm higher than the bottom of the tank body.
The tank cover is provided with a vacuum pumping port and a vacuum probe, and the vacuum pumping port is connected with the vacuum pumping pipeline and used for enabling the vacuum environment in the fully-sealed liquid storage tank to be the same as the vacuum environment in the molecular distiller;
furthermore, a liquid baffle plate is arranged below the vacuum pumping hole, and the liquid baffle plate is arranged at a position 5-10cm below the vacuum pumping hole and used for blocking splashed liquid and preventing the liquid from entering the vacuum pumping hole.
Furthermore, the heating medium is steam, a steam solenoid valve is arranged at the joint of the heating medium input pipeline and the heating medium inlet and used for controlling the input quantity of the heating medium so as to control the temperature inside the fully-sealed liquid storage tank, and a drain valve is arranged at the joint of the heating medium output pipeline and the heating medium outlet and used for discharging condensed water in the jacket.
Furthermore, the part that the inlet liquid pipeline extends to inside the totally enclosed liquid storage tank has a 90 elbow of decurrent for guarantee to get into the feed liquid of totally enclosed liquid storage tank flows downwards, can not spray and get into the vacuum extraction opening.
The volume of the open type liquid storage tank is not less than 3m3And the bottom of the liquid storage tank is provided with a liquid outlet for supplementing liquid into the fully-sealed liquid storage tank through the material supplementing pump and the liquid inlet pipeline.
The material supplementing pump is arranged on the open liquid storage tank and the liquid inlet pipeline between the fully-sealed liquid storage tanks, is made of acid-base corrosion resistant plastic materials, and is used for preventing corrosive materials from corroding the pump body to influence the stability of the material supplementing pump in long-time use.
The control device comprises a vacuum gauge, a thermometer, a liquid level meter, a relay and a PLC (programmable logic controller), wherein the PLC is connected with the steam electromagnetic valve, the plastic feeding pump and the electric ball valve through a circuit and the relay and is used for automatically and stably controlling the temperature and pressure environment, feeding and discharging of the fully-sealed liquid storage tank; the temperature probe, the vacuum probe and the liquid level probe are respectively connected with the thermometer, the vacuum meter and the liquid level meter through circuits, and are further connected with the PLC controller for providing temperature, pressure and liquid level data for the PLC controller.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses set up the totally enclosed liquid storage pot of a tape clamp cover between feed supplement pump and molecular still for the temperature, liquid level and the pressure etc. of control molecular still feeding can realize stable feeding.
(2) The utility model discloses a feed supplement pump is the pump of the plastics material that adopts acid and alkali-resistance corruption, can prevent effectively that long-time use has the unstable influence of feeding that corrosive materials brought to the corruption of the pump body.
(3) The utility model discloses a PLC controller passes through the circuit, cooperates various probe and electric ball valve and steam solenoid valve, knows the ambient condition in the totally enclosed liquid storage pot of material, and automatic adjustment material temperature and material feed supplement, ejection of compact speed realize stabilizing the automated control of feeding to molecular distillation, improve production efficiency, practice thrift the human labor.
Drawings
FIG. 1 is a schematic structural view of a stable molecular distillation feeding device of the present invention
FIG. 2 the electric control schematic diagram of a stable molecular distillation feeding device of the present invention
In the figure, 1-a third electric ball valve, 2-a temperature probe, 3-a low liquid level probe, 4-a high liquid level probe, 5-a liquid baffle, 6-a second electric ball valve, 7-a vacuum probe, 8-a first electric ball valve, 9-a steam electromagnetic valve, 10-a jacket, 11-a drain valve, 12-an open liquid storage tank, 13-a fully-sealed liquid storage tank, 14-a molecular distiller, 15-a feed pump, 16-a liquid inlet pipeline, 17-a vacuum pumping pipeline, 18-a liquid outlet pipeline and 19-a feed control cabinet.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments.
Example 1
The stable molecular distillation feeding device of the embodiment, as shown in fig. 1, comprises an open type liquid storage tank 12, a feeding pump 15, a totally sealed liquid storage tank 13 with a clamp sleeve 10, a liquid inlet pipeline 16, a liquid outlet pipeline 18, a vacuum pumping pipeline 17, two liquid level probes (a high liquid level probe 4 and a low liquid level probe 3), a vacuum probe 7, a temperature probe 2, three electric ball valves (a first electric ball valve 8, a second electric ball valve 6 and a third electric ball valve 1) and a feeding control cabinet 19, wherein the open type liquid storage tank 12 is connected with the totally sealed liquid storage tank 13 through the feeding pump 15 and the liquid inlet pipeline 16, a discharge port of the totally sealed liquid storage tank 13 is connected with a feed port of a molecular distiller 14 through the liquid outlet pipeline 18, a vacuum pumping port of the totally sealed liquid storage tank 13 is connected with a vacuum pumping device of the molecular distiller 14 through the vacuum pumping pipeline 17, an electric control instrument and a circuit in the control device are packaged in the feeding control cabinet 19, and through circuit and high liquid level probe 4, low liquid level probe 3, vacuum probe 7 and temperature probe 2 of setting in totally enclosed liquid storage pot 13 to and set up the electric ball valve in inlet fluid pipeline 16, liquid outlet pipeline 18 and evacuation pipeline 17 respectively and be connected, be used for right the utility model discloses a stable molecular distillation feed arrangement carries out automatic stability control. Wherein:
the fully-sealed liquid storage tank 13 is 200L in volume and comprises a tank body, a tank cover and a jacket 10, wherein the top of the tank body is connected with the tank cover through a sealing flange, the bottom of the tank body is provided with a discharge hole for being connected with a liquid outlet pipeline 18, the upper part of the side wall of the tank body is provided with a feed inlet for being connected with a liquid inlet pipeline 16, the upper part of the other side of the side wall of the tank body is 20cm lower than the flange at the top of the tank body and is provided with a high liquid level probe 4, a low liquid level probe 3 and a temperature probe 2 are respectively arranged below the high liquid level probe 4, the low liquid level probe 3 is arranged 10; the top of the tank cover is provided with a vacuum pumping hole for connecting with a vacuum pumping pipeline 17, a liquid baffle plate 5 is arranged at a position 5cm under the vacuum pumping hole for blocking splashed liquid and preventing the splashed liquid from entering the vacuum pumping hole, and the tank cover is also provided with a vacuum probe 7; the jacket 10 is arranged outside the tank body, a heating medium steam inlet is arranged at the middle upper part of the jacket 10 and is connected with a heating medium input pipeline, a steam electromagnetic valve 9 is arranged at the joint of the heating medium input pipeline and the heating medium inlet and is used for controlling the input quantity of heating medium steam and further controlling the temperature in the fully-sealed liquid storage tank 13, so that the heat-sensitive materials can be kept at proper temperature before entering the molecular still 14, a heating medium outlet is arranged at the bottom of the jacket 10 and is connected with a heating medium output pipeline, and a drain valve 11 is arranged at the joint of the heating medium output pipeline and the heating medium outlet and is used for discharging cooling water formed by condensing the steam in the jacket 10; all probes on the fully-sealed liquid storage tank 13 are sealed by adopting sealant, so that the sealing environment in the tank is ensured.
The volume of the open type liquid storage tank 12 is 3m3A liquid outlet is arranged at the bottom of the liquid storage tank and is connected with one end of a liquid inlet pipeline 16, the other end of the liquid inlet pipeline 16 is connected with a feed inlet of the fully-sealed liquid storage tank 13, a downward 90-degree elbow is arranged at the part of the liquid inlet pipeline 16 extending to the inside of the fully-sealed liquid storage tank 13 and is used for ensuring that liquid entering the fully-sealed liquid storage tank 13 flows downwards and does not splash to enter a vacuum extraction opening, and a first electric ball valve 8 is arranged at the connection part of the liquid inlet pipeline 16 and the feed inlet of the fully-; the feed pump 15 is arranged openOn a liquid inlet pipeline 16 between the formula liquid storage tank 12 and the fully-sealed liquid storage tank 13, the feed supplement pump 15 is a pump made of acid-base corrosion resistant plastic materials, meets the requirements of a feeding pressure head and the like, and can keep stable feeding after being used for a long time; the liquid outlet pipeline 18 is connected with the discharge hole of the totally-sealed liquid storage tank 13 and the feed inlet of the molecular distiller 14, and a third electric ball valve 1 is arranged at the connection part of the liquid outlet pipeline 18 and the discharge hole of the totally-sealed liquid storage tank 13; the stainless steel pipeline 17 is connected with the air extraction port of the fully-sealed liquid storage tank 13 and the air extraction port of the molecular distiller 14, and a second electric ball valve 6 is arranged at the connection part of the stainless steel pipeline 17 and the air extraction port of the fully-sealed liquid storage tank 13; the high liquid level probe 4, the low liquid level probe 3, the vacuum probe 7 and the temperature probe 2 are respectively used for detecting the liquid level height, the vacuum degree and the temperature in the fully-sealed liquid storage tank 13.
As shown in fig. 2, the feeding control cabinet 19 encloses therein electric control devices of the control device, including a vacuum gauge, a thermometer, a liquid level meter, a relay, and a PLC controller. Wherein: the PLC is connected with the steam electromagnetic valve 9 through a circuit and a first relay and is used for controlling the steam air inflow of the jacket 10 so as to adjust the temperature in the fully-sealed liquid storage tank 13; the PLC is connected with the feeding pump 15 through a circuit and a second relay and is used for controlling the feeding pump 15 to be turned on and off; the PLC is connected with the first electric ball valve 8 through a circuit and a third relay and is used for controlling feeding of the liquid inlet pipeline 16; the PLC is connected with the second electric ball valve 6 through a circuit and a fourth relay and is used for controlling the vacuumizing pipeline 17 to vacuumize and controlling the vacuum degree or pressure in the fully-sealed liquid storage tank 13; the PLC is connected with the third electric ball valve 1 through a circuit and a fifth relay and is used for controlling the discharging of the liquid outlet pipeline 18; the liquid level of the feed liquid in the fully-sealed liquid storage tank 13 is adjusted by controlling the feeding and the discharging; temperature probe 2, vacuum probe 7, low liquid level probe 3 and high liquid level probe 4 are connected with thermometer, vacuum gauge, level gauge and then are connected with the PLC controller through the circuit respectively for temperature, pressure, the liquid level data in providing totally enclosed liquid storage pot 13 to the PLC controller, thereby can be according to the automatic stable feeding of control molecule distillation of the temperature, pressure, the liquid level data that set for in advance.
In practice, all valves remain closed until the molecular distillation is started. When pre-vacuumizing, the first electric ball valve 8 is closed, the second electric ball valve 6 is opened, the third electric ball valve 1 is closed, and at the moment, air in the fully-sealed liquid storage tank 13 is pumped into the vacuumizing equipment of the molecular distiller 14 from the second electric ball valve 6. When the fully-sealed liquid storage tank 13 feeds, the first electric ball valve 8 is opened, the feed supplement pump 15 is started, the second electric ball valve 6 and the third electric ball valve 1 are closed simultaneously, and when the liquid level in the fully-sealed liquid storage tank 13 is higher than the high liquid level probe 4, the first electric ball valve 8 and the feed supplement pump 15 are closed. The temperature on the feeding control cabinet 19 is set to a preheating temperature, steam enters the jacket 10 of the fully-sealed liquid storage tank 13 to preheat materials in the fully-sealed liquid storage tank 13, and cooling water formed by steam condensation is discharged from the bottom drain valve 11. When the molecular distillation is started, when the vacuum degree between the molecular distiller and the cold trap reaches about 100Pa, the first electric ball valve 8 and the feed supplement pump 15 are closed, the second electric ball valve 6 is opened, the vacuum degree in the fully-sealed liquid storage tank 13 reaches about 100Pa, at the moment, the third electric ball valve 1 is opened, and the feed liquid enters the main equipment of the molecular distiller 14 from the fully-sealed liquid storage tank 13 to start distillation. When the liquid level in the fully sealed liquid storage tank 13 is lower than the low liquid level probe 3, the second electric ball valve 6 and the third electric ball valve 1 are closed, the first electric ball valve 8 and the feed pump 15 are opened, and when the liquid level in the fully sealed liquid storage tank 13 is higher than the high liquid level probe 4, the first electric ball valve 8 and the feed pump 15 are closed, and the second electric ball valve 6 is opened. When the vacuum degree in the fully-sealed liquid storage tank 13 is consistent with the vacuum degree in the molecular distillation device 14, the third electric ball valve 1 is opened, and when the molecular distillation process needs stable feeding, the opening and closing degree of the third electric ball valve 1 is fixed at a fixed value. The utility model discloses a stable, automatic feeding function is realized to such molecular distillation feed arrangement structure.
The above description is only for the specific embodiments of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.
Claims (9)
1. A stable molecular distillation feeding device is characterized by comprising an open type liquid storage tank, a totally-sealed liquid storage tank with a jacket and a control device, wherein the open type liquid storage tank is connected with the totally-sealed liquid storage tank through a feed pump and a liquid inlet pipeline; the control device comprises a liquid level probe, a vacuum probe and a temperature probe which are arranged in the fully-sealed liquid storage tank, and electric ball valves which are respectively arranged in a liquid inlet pipeline, a liquid outlet pipeline and a vacuumizing pipeline, and the control device is used for carrying out automatic stable control on the molecular distillation feeding device.
2. The stable molecular distillation feeding device according to claim 1, wherein the totally enclosed liquid storage tank comprises a tank body, a tank cover and a jacket, the tank body is connected with the tank cover by a sealing flange, the bottom of the tank body is provided with a discharge hole connected with a liquid outlet pipeline, and the upper part of the side wall of the tank body is provided with a feed hole connected with a liquid inlet pipeline; the jacket is arranged outside the tank body, a heating medium inlet is formed in the middle upper portion of the jacket, and a heating medium outlet is formed in the bottom of the jacket.
3. The stabilized molecular distillation feed device according to claim 2, wherein the upper part of the side wall of the tank body is provided with a high liquid level probe, and the lower part is provided with a low liquid level probe and a temperature probe respectively; the tank cover is provided with a vacuum pumping hole and a vacuum probe.
4. The stabilized molecular distillation feed device according to claim 2, wherein the heating medium is steam, a steam solenoid valve is disposed near the heating medium inlet, and a drain valve is disposed near the heating medium outlet.
5. The stabilized molecular distillation feed device according to claim 3, wherein a liquid baffle plate is arranged below the vacuum pumping port, and the liquid baffle plate is arranged at a position 5-10cm under the vacuum pumping port.
6. The stabilized molecular distillation feed device according to claim 3, wherein the high level probe is positioned 15-25cm below the flange at the top of the tank and the low level probe is positioned 10-20cm above the bottom of the tank.
7. The stabilized molecular distillation feed device according to claim 1, wherein the portion of the feed line extending into the interior of the hermetically sealed reservoir tank has a downward 90 ° bend to prevent feed liquid from splashing into the vacuum extraction port.
8. The stabilized molecular distillation feed apparatus of claim 1, wherein the open reservoir volume is not less than 3m3And the bottom of the liquid inlet pipe is provided with a liquid outlet connected with the liquid inlet pipeline.
9. The stabilized molecular distillation feed device according to claim 4, wherein the control device comprises a vacuum gauge, a thermometer, a liquid level meter, a relay and a PLC controller, and the PLC controller is connected with the steam solenoid valve, the feed pump and the electric ball valve through a circuit and the relay; the temperature probe, the vacuum probe and the liquid level probe are respectively connected with the thermometer, the vacuum meter and the liquid level meter through circuits, and are further connected with the PLC controller for providing temperature, pressure and liquid level data for the PLC controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020167175.2U CN211752581U (en) | 2020-02-13 | 2020-02-13 | Stable molecular distillation feed arrangement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020167175.2U CN211752581U (en) | 2020-02-13 | 2020-02-13 | Stable molecular distillation feed arrangement |
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| CN211752581U true CN211752581U (en) | 2020-10-27 |
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| CN202020167175.2U Active CN211752581U (en) | 2020-02-13 | 2020-02-13 | Stable molecular distillation feed arrangement |
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