CN220143047U

CN220143047U - Pervaporation membrane separation device for laboratory

Info

Publication number: CN220143047U
Application number: CN202223346852.5U
Authority: CN
Inventors: 张杏梅; 李露
Original assignee: Xian University
Current assignee: Xian University
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-12-08
Anticipated expiration: 2032-12-13

Abstract

The utility model belongs to the field of pervaporation, and provides a pervaporation membrane separation device for a laboratory, which comprises a fixed frame, wherein one side of the fixed frame is sequentially connected with a membrane unit, a storage tank and a raw material pump from top to bottom, a bottom discharge port of the storage tank is communicated with a feed end of the raw material pump, a top feed port of the storage tank is communicated with a bottom feed back port of the membrane unit, a discharge end of the raw material pump is communicated with a bottom feed port of the membrane unit, the other side of the fixed frame is sequentially connected with a cooling collecting unit and a vacuum generating unit from top to bottom, a feed port of the cooling collecting unit is communicated with a top discharge port of the membrane unit, an air outlet end of the cooling collecting unit is communicated with an air inlet of the vacuum generating unit, and a control unit is arranged in the fixed frame and is electrically connected with the raw material pump, the membrane unit, the storage tank and the vacuum generating unit. The utility model is convenient for moving and carrying, and has high automation and integration degree and high space utilization rate of equipment.

Description

Pervaporation membrane separation device for laboratory

Technical Field

The utility model belongs to the field of pervaporation, and particularly relates to a pervaporation membrane separation device for a laboratory.

Background

Pervaporation is a novel membrane separation technology, and a mode of vacuumizing or blowing the downstream of a membrane is adopted to enable components to be separated to form component pressure difference on the upstream side and the downstream side of the membrane, and selective separation of the components to be separated is achieved through a dissolution-diffusion mechanism by utilizing different interaction forces of different components and membrane materials. The pervaporation technology is particularly suitable for separating a near-boiling point system and an azeotropic system, especially for removing a small amount of water in an organic solvent, and has realized large-scale industrial application, and the energy consumption is far lower than that of the traditional azeotropic distillation. In recent years, research on pervaporation has focused mainly on removal of trace organics in water and separation of organic/organic hybrid systems.

However, most of the existing laboratory pervaporation membrane separation devices are built by themselves in a laboratory, the structure is unreasonable and attractive, the automation and integration degree of equipment are not high, the equipment is inconvenient to detach and transport after being built, and the space utilization rate is unreasonable, so that a small-sized pervaporation membrane separation device for the laboratory, which is high in automation and integration degree, good in space utilization rate and convenient to move, is needed.

Disclosure of Invention

The utility model aims to provide a pervaporation membrane separation device for a laboratory, so as to solve the problems, and achieve the purposes of improving automation and integration, improving space utilization and facilitating movement.

In order to achieve the above object, the present utility model provides the following solutions: the utility model provides a pervaporation membrane separation device for laboratory, includes fixed frame, fixed frame's one side has connected gradually membrane unit, storage tank and raw materials pump from last to down, the bottom discharge gate of storage tank with the feed end intercommunication of raw materials pump, the top feed inlet of storage tank with the bottom feed back mouth intercommunication of membrane unit, the discharge end of raw materials pump with the bottom feed inlet intercommunication of membrane unit, fixed frame's opposite side has connected gradually cooling collection unit and vacuum production unit from last to down, cooling collection unit's feed inlet with the top discharge gate intercommunication of membrane unit, cooling collection unit's the end of giving vent to anger with the air inlet intercommunication of vacuum production unit, be provided with the control unit in the fixed frame, the control unit with raw materials pump, membrane unit, storage tank, vacuum production unit electric connection.

Preferably, the membrane unit includes the membrane pond down, lower membrane pond bottom fixed connection is in fixed frame is close to one side of raw materials pump, the top fixedly connected with in membrane pond down, fixedly connected with support net between membrane pond down and the last membrane pond, the circumference lateral wall bottom of membrane pond inwards has been seted up down the membrane pond feed inlet down, the membrane pond feed inlet down has been seted up down to the bottom of membrane pond, down the membrane pond feed inlet with the discharge end intercommunication of raw materials pump, down the membrane pond feed inlet with the top intercommunication of storage tank, go up the membrane pond discharge gate has been seted up at the top of membrane pond, go up the membrane pond discharge gate with the feed inlet intercommunication of cooling collection unit.

Preferably, the heating jacket is sleeved on the outer side wall of the storage tank, the top of the storage tank is fixedly connected with a cover plate, the top of the cover plate is communicated with the bottom of the membrane unit, and the heating jacket is electrically connected with the control unit.

Preferably, the cooling collecting unit comprises two groups of cold traps, the two groups of cold traps are fixedly connected to the fixed frame, a first three-way valve is communicated between the feeding ends of the two groups of cold traps, the first three-way valve is communicated with the discharging hole of the upper membrane tank, a second three-way valve is communicated between the air outlet ends of the two groups of cold traps, the second three-way valve is communicated with the vacuum generating unit, separating material outlets are respectively arranged at two ends of the second three-way valve, and the two groups of separating material outlets are respectively communicated with two groups of liquid collecting bottles.

Preferably, the vacuum generating unit comprises a vacuum pump, the vacuum pump is fixedly connected to the bottom of the inner side of the fixed frame, an air inlet of the vacuum pump is communicated with the second three-way valve, an air outlet of the vacuum pump is communicated with a buffer tank, the buffer tank is fixedly connected to the inside of the fixed frame, and one end, far away from the vacuum pump, of the buffer tank is communicated with the atmosphere.

Preferably, the heat insulation material is wrapped by the pipeline between the storage tank and the raw material pump, the pipeline between the raw material pump and the lower membrane tank, and the pipeline connected between the lower membrane tank and the storage tank.

Preferably, the pipeline connected between the upper membrane tank and the cold trap is a vacuum threaded pipe.

The utility model has the following technical effects: the main functions of the fixed frame are to intensively fix the storage tank, the raw material pump, the membrane unit, the cooling and collecting unit and the vacuum generating unit together and reduce the occupied area of the device, the main functions of the storage tank are to provide a storage space for raw materials to be separated and recover the raw materials trapped back from the membrane unit, the main functions of the raw material pump are to pump the raw materials to be separated into the membrane unit, the raw material pump is electrically connected with a raw material pump switch and a raw material pump flow regulator of the control unit, the main functions of the membrane unit are to selectively separate the raw materials to be separated by utilizing different interaction forces of different components and membrane materials, the main functions of the cooling and collecting unit are to cool the gas raw materials passing through the membrane unit and collect the gas raw materials in a liquid form, the main functions of the vacuum generating unit are to provide a partial pressure difference for separating the raw materials of the membrane unit, the separation process is driven, and the control unit can set operation parameters and control the operation of the whole device. In whole, the utility model adopts a skid-mounted structure, is convenient for moving and carrying, and has high automation and integration degree and high space utilization rate of equipment.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a separation device of the present utility model;

FIG. 2 is a rear view of the separation device of the present utility model;

FIG. 3 is an assembly view of a membrane unit of the present utility model;

FIG. 4 is a block diagram of the upper membrane tank of the present utility model;

FIG. 5 is a schematic diagram of a lower membrane tank of the present utility model;

wherein, 1, a storage tank; 2. a raw material pump; 3. a fixed frame; 4. a cold trap; 5. a liquid collecting bottle; 6. a vacuum pump; 7. a buffer tank; 8. a power switch; 9. a raw material pump switch; 10. a vacuum pump switch; 11. a membrane cell temperature display; 12. a raw material pump flow regulator; 13. a storage tank temperature display; 14. a vacuum pump pressure display; 15. a heating jacket; 16. a film feeding pool; 17. a lower membrane pool; 18. a support net; 19. a cover plate; 20. a membrane unit; 21. a discharge hole of the upper membrane tank; 22. a feeding hole of the lower membrane tank; 23. and a feed back opening of the lower membrane tank.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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 order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1-5, the utility model provides a pervaporation membrane separation device for a laboratory, which comprises a fixed frame 3, wherein one side of the fixed frame 3 is sequentially connected with a membrane unit 20, a storage tank 1 and a raw material pump 2 from top to bottom, a bottom discharge port of the storage tank 1 is communicated with a feed end of the raw material pump 2, a top feed port of the storage tank 1 is communicated with a bottom feed port of the membrane unit 20, a discharge end of the raw material pump 2 is communicated with a bottom feed port of the membrane unit 20, the other side of the fixed frame 3 is sequentially connected with a cooling collection unit and a vacuum generation unit from top to bottom, a feed port of the cooling collection unit is communicated with a top discharge port of the membrane unit 20, an air outlet end of the cooling collection unit is communicated with an air inlet of the vacuum generation unit, and a control unit is arranged in the fixed frame 3 and is electrically connected with the raw material pump 2, the membrane unit 20, the storage tank 1 and the vacuum generation unit.

The fixed frame 3 mainly aims at fixing the storage tank 1, the raw material pump 2, the membrane unit, the cooling and collecting unit and the vacuum generating unit together in a concentrated manner and reducing the occupied area of the device, the storage tank 1 mainly aims at providing a storage space for raw materials to be separated and recovering the raw materials trapped back from the membrane unit 20, the raw material pump 2 mainly aims at pumping the raw materials to be separated into the membrane unit 20, the raw material pump 2 is electrically connected with the raw material pump switch 9 and the raw material pump flow regulator 12 of the control unit, the membrane unit 20 mainly aims at selectively separating the raw materials to be separated by utilizing different components and different interaction forces of the membrane materials, the cooling and collecting unit mainly aims at cooling the raw materials to be separated through the membrane unit 20 and collecting the raw materials in a liquid form, the vacuum generating unit mainly aims at providing a partial pressure difference for separating the raw materials of the membrane unit 20 and driving the separation process to be carried out, and carrying out secondary collection on the gas which is not fully collected, so that pollution caused by directly discharging the raw materials into the air is avoided, and the control unit can set operation parameters and control the operation of the whole device; in whole, the utility model adopts a skid-mounted structure, is convenient for moving and carrying, and has high automation and integration degree and high space utilization rate of equipment.

Further optimizing scheme, membrane unit 20 includes lower membrane pond 17, lower membrane pond 17 bottom fixed connection is in the one side that fixed frame 3 is close to raw materials pump 2, the top fixedly connected with in lower membrane pond 17 goes up membrane pond 16, fixedly connected with support net 18 between lower membrane pond 17 and the last membrane pond 16, lower membrane pond feed inlet 22 has inwards been seted up to the circumference lateral wall bottom in lower membrane pond 17, lower membrane pond feed return opening 23 has been seted up to the bottom in lower membrane pond 17, lower membrane pond feed inlet 22 communicates with the discharge end of raw materials pump 2, lower membrane pond feed return opening 23 communicates with the top of storage tank 1, go up membrane pond discharge gate 21 has been seted up at the top of going up membrane pond 16, go up membrane pond discharge gate 21 and cooling collection unit's feed inlet intercommunication.

The lower membrane tank 17 and the upper membrane tank 16 are sealed by a gasket, a complete membrane tank structure is formed by flange fixation, the bottom surface of the upper membrane tank 16 is parallel to the end surface of the supporting net 18, the supporting net 18 is connected with the upper membrane tank 16 by transition fit, a channel in the membrane tank is spiral, the separation process of raw materials can be prolonged, the separation process is fully carried out, raw materials to be separated enter the membrane tank from a lower membrane tank feed inlet 22 of the lower membrane tank 17 along the tangential direction of the channel, the raw materials trapped by the membrane tank flow back into the storage tank 1 through a lower membrane tank feed return opening 23 of the lower membrane tank 17, the raw materials passing through the membrane tank enter the cooling collection unit from an upper membrane tank discharge opening 21 of the upper membrane tank 16, and the membrane tank is electrically connected with a membrane tank temperature display 11 by a temperature sensor, so that the membrane tank temperature is detected in real time.

Further optimizing scheme, the cover is equipped with heating jacket 15 on the lateral wall of storage tank 1, and the top fixedly connected with apron 19 of storage tank 1, apron 19's top and membrane unit 20 bottom intercommunication, heating jacket 15 and the control unit electric connection.

The main effect of heating jacket 15 is heating storage tank 1, makes the raw materials that wait to separate reach required temperature, and the top fixedly connected with temperature probe of apron 19, heating jacket 15 and temperature probe and the storage tank temperature display 13 electric connection of control unit adjust heating jacket power to adjust the liquid storage tank temperature, apron 19 adopts flange joint with storage tank 1, and charge door and temperature probe inserted hole have been seted up at apron 19 top, and temperature probe passes through the temperature probe inserted hole and gets into in the storage tank 1, still is provided with the liquid level display meter on the storage tank 1, and the main effect is the raw materials surplus in the real-time display storage tank 1.

Further optimizing scheme, the cooling collection unit includes two sets of cold traps 4, and two sets of cold traps 4 fixed connection are on fixed frame 3, and the intercommunication has first three-way valve between the feed end of two sets of cold traps 4, and first three-way valve communicates with last membrane pond discharge gate 21, and the intercommunication has the second three-way valve between the end of giving vent to anger of two sets of cold traps 4, and the second three-way valve communicates with vacuum production unit, and the both ends of second three-way valve are provided with the separation material export respectively, and two sets of separation material exports communicate respectively has two sets of liquid collecting bottle 5.

The cold traps 4 are made of glass materials, the external connection is used for condensing by the existing liquid nitrogen condensing device, the first three-way valve and the second three-way valve can realize the switching of the two groups of cold traps 4, and the condensed liquid raw materials flow into the liquid collecting bottle 5 under the action of gravity.

Further optimizing scheme, vacuum production unit includes vacuum pump 6, and vacuum pump 6 fixed connection is in the inboard bottom of fixed frame 3, and vacuum pump 6's air inlet and second three-way valve intercommunication, and vacuum pump 6's gas outlet intercommunication has buffer tank 7, and buffer tank 7 fixed connection is on fixed frame 3, and buffer tank 7 keeps away from vacuum pump 6's one end and atmosphere intercommunication.

The vacuum pump 6 is electrically connected with a vacuum pump switch 10 of the control unit, and mainly has the function of providing a partial pressure difference for separating raw materials of a membrane tank, driving the separation process to be carried out, and the buffer tank 7 has the main function of preventing the pressure in the device from suddenly changing, maintaining the pressure of the system to be stable, preventing the oil in the vacuum pump from being sucked back into the receiving device, and fixedly connecting a pressure transmitter probe (not shown in the figure) in the buffer tank 7, wherein the pressure transmitter probe (not shown in the figure) is electrically connected with a vacuum pump pressure display 14 of the control unit, and adjusting the power of the vacuum pump 6.

Further optimizing scheme, the pipeline between storage tank 1 and raw materials pump 2, the pipeline between raw materials pump 2 and lower membrane pond 17, the pipeline that links to each other between lower membrane pond 17 and storage tank 1 all wrap up the heat preservation material.

The heat insulation material has the main function of weakening the heat exchange process between the inside and the outside of the pipeline, so that raw materials can flow according to the set temperature, and the subsequent separation process is ensured to be carried out smoothly.

In a further optimized scheme, the pipeline connected between the upper membrane tank 16 and the cold trap 4 is a vacuum threaded pipe.

The vacuum threaded pipe has certain flexibility and good temperature resistance and pressure resistance, and can realize flexible and sealed connection between the upper membrane pool and the cold trap so as to ensure the smooth proceeding of the separation process.

The working procedure of this embodiment is as follows: before use, raw materials to be separated are added into a feed port on a cover plate 19, a power switch 8 is turned on, a raw material pump 2 is started, the pumping flow of the raw material pump 2 is set on a raw material pump flow regulator 12, the temperature of a membrane tank unit is set on a membrane tank temperature display 11, the temperature of a storage tank 1 is set on a storage tank temperature display 13, when the temperature of the membrane tank temperature display 11 reaches a set temperature, a vacuum pump switch 10 is turned on, a vacuum pump 6 is started, raw materials to be separated are pumped to a lower membrane tank 17 through the raw material pump 2, under the pumping action of the vacuum pump 6, raw materials to be separated flow back to the storage tank 1 through the membrane tank 17, raw materials passing through the membrane tank enter any cold trap 4 for cooling under the pumping action of the vacuum pump 6 in a gas mode through a first three-way valve, and the condensed raw materials are collected in a liquid state in a liquid collecting bottle 5 corresponding to the cold trap 4, so that the raw materials are separated.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, 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 present utility model.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims

1. A laboratory pervaporation membrane separation device, characterized in that: including fixed frame (3), one side of fixed frame (3) has connected gradually membrane unit (20), storage tank (1) and raw materials pump (2) from last to down, the bottom discharge gate of storage tank (1) with the feed inlet intercommunication of raw materials pump (2), the top feed inlet of storage tank (1) with the bottom feed back mouth intercommunication of membrane unit (20), the discharge end of raw materials pump (2) with the bottom feed inlet intercommunication of membrane unit (20), the opposite side of fixed frame (3) has connected gradually cooling collection unit and vacuum production unit from last to down, the feed inlet of cooling collection unit with the top discharge gate intercommunication of membrane unit (20), the end of giving vent to anger of cooling collection unit with the air inlet intercommunication of vacuum production unit, be provided with the control unit in fixed frame (3), the control unit with raw materials pump (2), membrane unit (20), storage tank (1), vacuum generation unit electric connection.

2. A laboratory pervaporation membrane separation device according to claim 1, wherein: the membrane unit (20) comprises a lower membrane tank (17), the bottom of the lower membrane tank (17) is fixedly connected with one side, close to the raw material pump (2), of the fixed frame (3), the top of the lower membrane tank (17) is fixedly connected with an upper membrane tank (16), a support net (18) is fixedly connected between the lower membrane tank (17) and the upper membrane tank (16), a lower membrane tank feed port (22) is inwards formed in the bottom of the circumferential side wall of the lower membrane tank (17), a lower membrane tank feed back port (23) is formed in the bottom of the lower membrane tank (17), the lower membrane tank feed back port (22) is communicated with the discharge end of the raw material pump (2), the lower membrane tank feed back port (23) is communicated with the top of the storage tank (1), an upper membrane tank discharge port (21) is formed in the top of the upper membrane tank (16), and the upper membrane tank discharge port (21) is communicated with the feed port of the cooling collecting unit.

3. A laboratory pervaporation membrane separation device according to claim 1, wherein: the heating jacket (15) is sleeved on the outer side wall of the storage tank (1), a cover plate (19) is fixedly connected to the top of the storage tank (1), the top of the cover plate (19) is communicated with the bottom of the membrane unit (20), and the heating jacket (15) is electrically connected with the control unit.

4. A laboratory pervaporation membrane separation device according to claim 2, wherein: the cooling collection unit comprises two groups of cold traps (4), the two groups of cold traps (4) are fixedly connected to the fixed frame (3), a first three-way valve is communicated between feeding ends of the cold traps (4), the first three-way valve is communicated with a discharge hole (21) of the upper membrane tank, a second three-way valve is communicated between air outlet ends of the cold traps (4), the second three-way valve is communicated with the vacuum generation unit, separation material outlets are respectively arranged at two ends of the second three-way valve, and the two groups of separation material outlets are respectively communicated with two groups of liquid collecting bottles (5).

5. A laboratory pervaporation membrane separation device according to claim 4, wherein: the vacuum generating unit comprises a vacuum pump (6), the vacuum pump (6) is fixedly connected to the bottom of the inner side of the fixed frame (3), an air inlet of the vacuum pump (6) is communicated with the second three-way valve, an air outlet of the vacuum pump (6) is communicated with a buffer tank (7), the buffer tank (7) is fixedly connected to the fixed frame (3), and one end, far away from the vacuum pump (6), of the buffer tank (7) is communicated with the atmosphere.

6. A laboratory pervaporation membrane separation device according to claim 2, wherein: the heat insulation material is wrapped by the pipeline between the storage tank (1) and the raw material pump (2), the pipeline between the raw material pump (2) and the lower membrane tank (17) and the pipeline connected between the lower membrane tank (17) and the storage tank (1).

7. A laboratory pervaporation membrane separation device according to claim 4, wherein: the pipeline connected between the upper membrane tank (16) and the cold trap (4) is a vacuum threaded pipe.