CN209734992U - Energy-saving, environment-friendly and water-saving rotary evaporation concentration device - Google Patents
Energy-saving, environment-friendly and water-saving rotary evaporation concentration device Download PDFInfo
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- CN209734992U CN209734992U CN201822159773.0U CN201822159773U CN209734992U CN 209734992 U CN209734992 U CN 209734992U CN 201822159773 U CN201822159773 U CN 201822159773U CN 209734992 U CN209734992 U CN 209734992U
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Abstract
The utility model relates to an energy-concerving and environment-protective water-saving rotary evaporation concentration device. Rotatory evaporation enrichment facility, structure with current rotatory evaporator is the basis, with the former retort of corrosion-resistant metal material's conical or round platform shape distiller replacement, personally submit the rotation axis of 30 ~ 45 degrees contained angles with the level in the past and change horizontal rotation axis into, will evaporate gaseous material and use vapor compressor compression, utilize the fraction through the compression and treat the difference in temperature of distillate, with the help of distiller wall and heat exchanger heat exchange, realize treating the continuous heating of distillation sample, the supplementary heating when the electric heating element is driven as the distillation to start up outside the feeding tube, original condensation subassembly has not only been saved, refrigerant, water bath (oil) pot, the subassembly of former operating system and angle adjustment system has still been saved. The utility model discloses intelligent control distillation is applicable to water-deficient environment, microgravity environment and requires higher environment in the aspect of water conservation and energy saving, miniaturization.
Description
Technical Field
The utility model relates to an evaporation equipment technical field, in particular to energy-concerving and environment-protective water-saving rotary evaporation enrichment facility.
Background
The rotary evaporator is extraction experimental equipment for carrying out reduced pressure distillation concentration on materials, is widely applied to experiments of scale concentration, drying, extraction recovery and the like of samples, and is particularly used for quickly distilling a large amount of solvents. The existing rotary evaporator is generally composed of components such as a vacuumizing device, a heating device, a condensing device, a rotating device and the like, the principle of the rotary evaporator is mainly that the flask is controlled by electronic equipment, the flask is rotated at a constant speed under the most suitable rotating speed to enable a solvent to form a thin film, the evaporation area is increased, the evaporation flask is in a negative pressure state through a vacuum pump, the evaporation flask is placed in a water bath pot or an oil bath pot for constant temperature heating while rotating, the heating temperature can be close to the boiling point of the solvent, the solution in the flask is heated and diffused under the negative pressure to be evaporated, and the rapid evaporation of the solvent is realized.
the rotary evaporator used in the prior art mostly depends on tap water or ice blocks to cool evaporated gaseous substances to obtain liquid fractions, a few of the rotary evaporators use dry ice as a coolant and use other refrigerants (such as freons, a few hydrocarbons, ammonia and the like used in refrigeration of a refrigeration dryer), and tap water in use is usually directly discharged, so that not only is waste of water resources and other refrigerants caused, but also a water (oil) bath kettle is required to heat all the time in use, and the energy consumption is high. There is also a problem that use in a water-deficient environment or a microgravity environment is limited.
SUMMERY OF THE UTILITY MODEL
The utility model provides an energy-concerving and environment-protective water-saving rotary evaporation enrichment facility has solved among the prior art rotary evaporator and has had the problem that the condensing agent is extravagant, the energy consumption is high and can't use in water-deficient environment, microgravity environment.
In order to achieve the purpose, the utility model provides an energy-saving, environment-friendly and water-saving rotary evaporation concentration device, which comprises a bracket, wherein an evaporator is fixed on the bracket; the evaporator is filled with the liquid to be distilled and driven to rotate by a rotating motor, and is electrically controlled by a control panel;
A discharge port is formed in the side wall of a feeding channel of the evaporator and is communicated with a steam inlet of a steam compressor, distillate to be distilled is decompressed and evaporated in the evaporator, evaporated gaseous substances are compressed by the steam compressor into fractions with higher temperature and are sprayed onto the outer wall of the evaporator or jet into an evaporator outer cover covering the outer side of the evaporator through a liquid channel communicated with the steam compressor, and flow in a sandwich channel formed by the evaporator and the evaporator outer cover, and heat exchange between the fractions and the distillate to be distilled is realized on the wall of the evaporator; the fraction after heat exchange flows out through a fraction outlet;
The evaporation concentration device also comprises a heat exchanger arranged at the distillate outlet, and the distillate after heat exchange is subjected to heat exchange with newly-entered distillate to be distilled through the heat exchanger by utilizing waste heat.
The evaporator is of a conical structure or a circular truncated cone-shaped structure, the evaporator is horizontally arranged and rotates horizontally along the central axis of the evaporator, and the conical surface of the evaporator is a heat exchange surface.
The vapor compressor includes a roots-type compressor, a centrifugal compressor, a piston-type compressor, a screw-type compressor, a vane-type compressor, and preferably, the vapor compressor may be a variable-frequency compressor.
A steam inlet and a compressed object outlet are formed on the steam compressor, the steam inlet is communicated with the discharge hole, and the compressed object outlet is communicated with the liquid channel; the fraction outlet is formed at the lowest liquid level position of the interlayer channel.
A feeding pipe into which distillate enters, a liquid discharge pipe extending into the evaporator and used for discharging concentrated liquid and a liquid level sensor are arranged in the feeding channel;
The feeding pipe and the liquid discharge pipe are respectively connected with the feeding pump and the liquid discharge pump.
A low-temperature liquid inlet pipe is formed in the heat exchanger, and a heat exchange cavity is formed between the low-temperature liquid inlet pipe and the outer wall of the heat exchanger; the low-temperature liquid inlet pipe is communicated with the feeding pipe; the heat exchange cavity is communicated with the fraction outlet, and the fraction subjected to heat exchange flows out through the liquid outlet of the heat exchanger.
The device also comprises a gas-liquid separator;
The gas-liquid separator is arranged between the collecting bottle and the heat exchanger; the liquid outlet of the gas-liquid separator is communicated with the collecting bottle, liquid fractions after gas-liquid separation are input into the collecting bottle, and a small amount of non-condensable gas is discharged through a gas pipeline arranged on the gas-liquid separator;
Alternatively, the first and second electrodes may be,
The gas-liquid separator is disposed between the fraction outlet and the heat exchanger; and a liquid outlet of the gas-liquid separator is communicated with the heat exchange cavity, liquid fractions obtained after gas-liquid separation are input into the heat exchanger, and non-condensable gas is discharged through a gas pipeline.
A steam temperature sensor is arranged between the discharge port and the steam compressor, and a steam pressure sensor is arranged at the discharge port; a micro vacuum pump can be arranged between the steam temperature sensor and the steam compressor according to requirements.
the heating component is an electric heating belt arranged on the outer wall of the feeding pipe and used for starting and heating when the distillate is driven at a lower temperature; a temperature controller sensor probe is also arranged between the electric heating belt and the evaporator. And a glass fiber band is arranged outside the electric heating band and used for insulating and fixing the electric heating band.
The rotary motor, the steam compressor, the electric heating belt, the liquid level sensor, the steam temperature sensor, the steam pressure sensor, the feeding pump, the liquid discharge pump and the one-way valve are all in communication connection with the control panel.
rotatory evaporative concentration device utilizes vapor compressor to compress into the fraction with the gaseous state material of evaporation and collects, has left out coolants such as condensing system subassembly and cooling water, ice-cube, dry ice, has practiced thrift the water resource greatly, has saved water (oil) bath kettle, has practiced thrift water (oil) resource, has reduced the energy consumption, is particularly useful for the environment of lack of water, microgravity environment and has higher requirement in the aspect of energy-conservation.
Rotatory evaporative concentration device has liquid channel's vapor compressor structure through the setting for liquid fraction after the compression can carry out the heat exchange with treating the distillate with the help of evaporimeter conical wall when flowing through liquid channel, utilizes the compression back fraction temperature high and the low actual conditions of feed treating the distillate temperature, and the entering treat the distillate because the heat exchange that lasts is heated, has effectively saved the required heating energy consumption of evaporation.
And simultaneously, rotatory evaporative concentration device to electric heating tape replaces current water bath pot or oil bath pot as heating element, right the inlet pipe carries out initial heating, makes evaporative concentration device's volume reduce greatly on the one hand, has reduced the heating water consumption and the oil consumption in the evaporation process moreover, has practiced thrift the cost.
Drawings
FIG. 1 is a schematic structural view of an evaporative concentration apparatus according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of an evaporative concentration apparatus according to embodiment 2 of the present invention;
Labeled as: 1-bracket, 2-evaporator, 3-rotating motor, 4-feeding channel, 5-liquid channel, 6-discharging port, 7-steam compressor, 8-steam inlet, 9-outlet of compressed object, 10-feeding pipe, 11-liquid discharging pipe, 12-liquid discharging port, 13-collecting bottle, 14-low-temperature liquid feeding pipe, 15-heat exchanging cavity, 16-heat exchanger, 17-fraction outlet, 18-electric heating belt, 19-gas-liquid separator, 20-liquid level sensor, 21-steam temperature sensor, 22-steam pressure sensor, 23-one-way valve, 24-control panel, 25-liquid outlet, 26-gas pipeline, 27-micro vacuum pump, 28-evaporator cover, 29-sandwich channel.
Detailed Description
in order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Example 1
Referring to the structure shown in fig. 1, the energy-saving, environment-friendly and water-saving rotary evaporation concentration device of the present invention comprises: the distillation.
Still be provided with control on the support 1 the rotatory rotating electrical machines 3 of evaporimeter 2, energy-concerving and environment-protective water-saving rotatory evaporative concentration device still is equipped with control 3 rotational speed of rotating electrical machines and heating temperature's control panel 24 to and control speed, heating temperature's control assembly etc., control panel 24 is right energy-concerving and environment-protective water-saving rotatory evaporative concentration device carries out electrical control, control panel 24 with the connected mode of each subassembly of device is prior art common means, and not shown in the concrete connection relation picture.
As the structure shown in fig. 1, the evaporator 2 is in the control of the rotating electrical machine 3 is rotated, the evaporator 2 is a conical horn-shaped structure with a seal, the radius of which is gradually increased from one end to the other end, or a truncated cone-shaped structure with a gradually increased radius, so as to increase the evaporation and heat exchange area and facilitate the collection of fluid according to the designed direction. The utility model discloses it is preferred evaporator 2 is the round platform structure, just 2 levels of evaporator set up and carry out horizontal rotation along its central axis. The material of the wall of the evaporator 2 can be corrosion-resistant metal, preferably titanium metal or corrosion-resistant metal or alloy. The utility model discloses increase level sensor 20 in evaporimeter 2 in order to master the condition of evaporation liquid level. And the optimal taper of the evaporator (2) is determined according to the properties of the material to be distilled, such as viscosity and the like.
as shown in fig. 1, a vapor compressor 7 is further provided, and in this embodiment, the vapor compressor 7 may be a piston compressor, a roots compressor, a centrifugal compressor, a screw compressor, or a vane compressor. The vapor inlet 8 of the vapor compressor 7 is communicated with the discharge port 6, the gaseous substance evaporated in the evaporator 2 enters the vapor compressor 7 to be compressed, and the compressed liquid and gas mixture is sprayed onto the outer wall of the evaporator 2 through the compressed substance outlet 9 and the liquid channel 5 and is collected. More preferably, the steam compressor 7 may be an inverter compressor, but whatever the type and form, the steam compressor 7 must be resistant to corrosion, resistant to water vapor and as far as possible free of contamination. The steam compressor 7 can also select a demister with an embedded type according to the characteristic requirement of the distillate to be distilled.
in the structure shown in fig. 1, the vapor compressor 7 is communicated with the evaporator housing 28 through a liquid channel 5, the compressed liquid fraction is injected onto the outer wall of the evaporator 2 or sprayed into the interlayer channel 29 between the evaporator 2 and the evaporator housing 28 through the compressed matter outlet 9 and the liquid channel 5, the compressed matter is contacted with the outer wall of the evaporator 2 at the interlayer channel 29 to realize the heat exchange between the fraction and the liquid to be distilled (i.e. forming a heat exchange surface at the conical surface wall), and the heat exchange is carried out by utilizing the temperature difference between the high temperature (32-90 ℃) of the fraction and the liquid to be distilled (room temperature-36 ℃) so as to effectively utilize the heat energy and realize the energy saving. The material to be compressed flows out through the distillate outlet 17 formed at the end of the evaporator housing 28, and the heat released by the compressed gaseous material in the heat exchange with the liquid to be distilled due to the temperature increase can be used to heat the evaporator 2, thereby facilitating the evaporation of the liquid to be distilled in the evaporator. As a preferred configuration, the distillate outlet 17 is disposed at the lowest liquid level of the evaporator housing 28. As a preferable structure, a steam temperature sensor 21 is additionally arranged between the discharge port 6 and the steam inlet 8 of the steam compressor 7 to master the change situation of the steam temperature, a steam pressure sensor 22 is additionally arranged to master the steam pressure change, and a micro vacuum pump 27 can be selectively arranged according to the characteristic requirement of the object to be distilled.
in the rotary evaporation and concentration device shown in fig. 1, a discharge port 6 is arranged inside the feed channel 4 of the evaporator 2 for discharging evaporated gaseous substances; still be provided with the inlet pipe 10 that supplies to wait the distillate feeding in the feedstock channel 4 to and the fluid-discharge tube 11 of discharge concentrate, inlet pipe 10 is connected with the charge pump, fluid-discharge tube 11 is connected with the fluid-discharge pump, accomplishes the process of automatic feed, discharge concentrate.
The rotary evaporation concentration device as shown in figure 1 is further provided with a heat exchanger 16, the heat exchanger 16 is respectively communicated with the fraction outlet 17 and the feeding pipe 10, and is used for preheating distillate after compression so as to further save energy consumption. Specifically, a low-temperature liquid inlet pipe 14 is formed inside the heat exchanger 16, and a heat exchange cavity 15 is formed between the low-temperature liquid inlet pipe 14 and the outer wall of the heat exchanger 16; the low-temperature liquid inlet pipe 14 is communicated with the feeding pipe 10; the heat exchange cavity 15 is communicated with the fraction outlet 17, and the fraction after heat exchange flows out through the liquid outlet 12 of the heat exchanger 16.
As shown in FIG. 1, the rotary evaporation concentration device of the present invention further comprises a gas-liquid separator 19 disposed between the heat exchanger 16 and the collecting bottle 13. An inlet of the gas-liquid separator 19 is connected to the heat exchanger liquid discharge port 12, and the fraction passing through the heat exchanger 16 is input to the gas-liquid separator 19, and the gas-liquid separator 19 is used for separating a compressed liquid fraction from a small amount of non-condensable gas. The liquid outlet 25 of the gas-liquid separator 19 is communicated with the collecting bottle 13, and a very small amount of non-condensable gas is discharged through a gas pipeline 26; a check valve 23 is provided between the drain port 12 and the gas-liquid separator 19 to prevent a reverse flow.
in the rotary evaporation concentrator structure shown in fig. 1, the heating assembly is used for heating the distillate to be distilled in the feed pipe 10, in this embodiment, the heating assembly may be an electric heating tape 18 wrapped at the outer wall of the feed pipe 10, the electric heating tape 18 heats and evaporates the distillate to be distilled through heat conduction of the wall of the feed pipe 10, and the electric heating tape 18 is preferably wrapped annularly at the outer wall of the feed pipe 10 to ensure that the temperature of the distillate to be distilled is too low and the initial evaporation starts. Meanwhile, a glass fiber tape is arranged outside the electric heating tape 18 and used as a heat insulation material and a fixing layer to realize heat insulation and fixing of the electric heating tape, and a temperature controller sensor probe is further arranged between the electric heating tape 18 and the outer wall of the feeding pipe 10 to detect the heating temperature.
Preferably, the rotating electrical machine 3, the vapor compressor 7, the electrical heating belt 18, the liquid level sensor 20, the vapor temperature sensor 21, the vapor pressure sensor 22, the feeding pump 30, the liquid discharge pump 31 and the check valve 23 are all connected with the control panel 24 in a communication manner to perform electrical control.
The rotary evaporation concentration device has the following use process: the feed liquid to be distilled enters the evaporator 2 through the feed pipe 10 for evaporation, the evaporated gaseous substance is output through the discharge port 6 and enters the vapor compressor 7 through the vapor inlet 8 connected with the discharge port, the gaseous substance is compressed through the vapor compressor 7 and enters the liquid channel 5 through the compressed substance outlet 9 and is sprayed on the outer wall of the evaporator 2, the heat exchange between the distillate and the material to be distilled is realized on the outer wall of the evaporator 2, the material to be distilled is heated, and the evaporation of the material is facilitated. The fraction after heat exchange flows out from the fraction outlet 17 through the interlayer channel 29 and enters the heat exchange cavity 15 of the heat exchanger 16, and is used for performing heat exchange for preheating the material to be distilled entering the low-temperature liquid inlet pipe 14 of the heat exchanger, so that the initial temperature of the material to be distilled is improved, the heat requirement of the subsequent evaporation process is reduced, the heat consumption is reduced, the liquid fraction after preheating exchange is discharged through the liquid outlet 12 arranged on the heat exchanger 16 and enters the gas-liquid separator 19, and the liquid fraction after separating a small amount of non-condensable gas is collected in the collection bottle 13.
Rotatory evaporation enrichment facility is because not using the condensation subassembly to condense the gaseous state material of evaporation, so need not to use condensing agents such as comdenstion water, dry ice, and simultaneously, what the evaporation of evaporimeter adopted is that the high temperature fraction after the compression provides and lasts heat energy, is treating under the condition that the distillate temperature is not enough to produce sufficient steam and be used for compressor compression, when if initial evaporation or treat that the distillate temperature is low through the further supplementary heating of electric heating subassembly, need not to use water (oil) to bathe the heating, has further practiced thrift water (oil) resource, avoids extravagant, still makes equipment miniaturization.
Example 2
Referring to the structure of the evaporation and concentration apparatus shown in FIG. 2, the evaporation and concentration apparatus of this embodiment has the same structure as that of embodiment 1 except that the positions of the gas-liquid separator 19 and the heat exchanger 16 are reversed. In this embodiment, the gas-liquid separator 19 is provided between the fraction outlet 17 and the heat exchanger 16. The gas-liquid separator 19 is communicated with the heat exchange cavity 15 of the heat exchanger 16, an inlet of the gas-liquid separator 19 is connected with the fraction outlet 17, and the gas-liquid separator 19 is used for separating the compressed liquid fraction from a small amount of non-condensable gas. The liquid outlet 25 of the gas-liquid separator 19 feeds the liquid fraction after gas-liquid separation into the heat exchange chamber 15 of the heat exchanger 16, and discharges a very small amount of non-condensable gas through the gas pipe 26. A one-way valve 23 is arranged between the fraction outlet 17 and the heat exchange cavity 15, a one-way valve is arranged between the liquid outlet 12 and the collecting bottle 13, and the one-way valve can be in communication connection with the control panel 24 for electrical control.
The embodiments of the present invention have been described in detail, and the principles and embodiments of the present invention have been explained herein using specific embodiments, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. An energy-saving, environment-friendly and water-saving rotary evaporation concentration device is characterized by comprising a bracket (1), wherein an evaporator (2) is fixed on the bracket (1); the evaporator (2) is filled with a liquid to be distilled and driven to rotate by a rotating motor (3), and is electrically controlled by a control panel (24);
A discharge port (6) is formed at the side wall of the feeding channel (4) of the evaporator (2), the discharge port (6) is communicated with a steam inlet (8) of a steam compressor (7), the distillate to be decompressed and evaporated in the evaporator (2), the evaporated gaseous substance is compressed by the steam compressor (7) into a higher-temperature fraction and is sprayed onto the outer wall of the evaporator (2) or flows into an evaporator housing (28) arranged outside the evaporator (2) through a liquid channel (5) communicated with the steam compressor (7) and flows in a sandwich channel (29) formed by the evaporator (2) and the evaporator housing (28), and the heat exchange between the fraction and the distillate to be distilled is realized on the wall of the evaporator (2); the fraction after heat exchange flows out through a fraction outlet (17);
the rotary evaporation concentration device also comprises a heat exchanger (16) arranged at the fraction outlet (17), and the fraction after heat exchange exchanges heat with newly-entered distillate to be distilled through the heat exchanger (16) by utilizing waste heat.
2. the energy-saving, environment-friendly and water-saving rotary evaporation concentration device according to claim 1, wherein the evaporator (2) is in a conical structure or a truncated cone structure, the evaporator (2) is horizontally arranged and horizontally rotates along the central axis of the evaporator, and the conical surface of the evaporator (2) is a heat exchange surface.
3. Energy and environmental water saving rotary evaporative concentration unit according to claim 1 or 2, wherein the vapor compressor (7) comprises a roots compressor, a centrifugal compressor, a piston compressor, a screw compressor, a vane compressor.
4. The energy-saving, environment-friendly and water-saving rotary evaporation concentration device according to claim 3, wherein the vapor compressor (7) is formed with a vapor inlet (8) and a compressed matter outlet (9), the vapor inlet (8) is communicated with the discharge port (6), and the compressed matter outlet (9) is communicated with the liquid channel (5); the fraction outlet (17) is formed at the lowest liquid level position of the sandwich channel (29).
5. The energy-saving, environment-friendly and water-saving rotary evaporation concentration device according to claim 4, wherein a feeding pipe (10) for distillate to enter, a liquid discharge pipe (11) extending into the evaporator (2) for discharging the concentrated liquid and a liquid level sensor (20) are arranged in the feeding channel (4); the feeding pipe (10) and the liquid discharge pipe (11) are respectively connected with the feeding pump and the liquid discharge pump.
6. The energy-saving, environment-friendly and water-saving rotary evaporation concentration device according to claim 5, wherein a low-temperature liquid inlet pipe (14) is formed inside the heat exchanger (16), and a heat exchange cavity (15) is formed between the low-temperature liquid inlet pipe (14) and the outer wall of the heat exchanger (16); the low-temperature liquid inlet pipe (14) is communicated with the feeding pipe (10); the heat exchange cavity (15) is communicated with the fraction outlet (17), and the fraction after heat exchange flows out through the liquid outlet (12) of the heat exchanger (16).
7. The energy-saving, environment-friendly and water-saving rotary evaporation concentrator according to claim 6, further comprising a gas-liquid separator (19);
The gas-liquid separator (19) is arranged between the collecting bottle (13) and the heat exchanger (16); a liquid outlet (25) of the gas-liquid separator (19) is communicated with the collecting bottle (13), liquid fractions obtained after gas-liquid separation are input into the collecting bottle (13), and non-condensable gas is discharged through a gas pipeline (26);
Alternatively, the first and second electrodes may be,
the gas-liquid separator (19) is disposed between the fraction outlet (17) and the heat exchanger (16); and a liquid outlet (25) of the gas-liquid separator (19) is communicated with the heat exchange cavity (15), liquid fractions obtained after gas-liquid separation are input into the heat exchanger (16), and non-condensable gas is discharged through a gas pipeline (26).
8. The energy-saving, environment-friendly and water-saving rotary evaporation concentration device according to claim 7, wherein a steam temperature sensor (21) is arranged between the discharge port (6) and the steam compressor (7), and a steam pressure sensor (22) is arranged at the discharge port (6); a micro vacuum pump (27) can be arranged between the steam temperature sensor (21) and the steam compressor (7).
9. The energy-saving, environment-friendly and water-saving rotary evaporation concentration device according to claim 8, further comprising a heating component, wherein the heating component is an electric heating belt (18) arranged at the outer wall of the feeding pipe (10) and used for starting heating when the distillate is driven to be heated at a lower temperature; a temperature controller sensor probe is also arranged between the electric heating belt (18) and the evaporator (2).
10. The energy-saving, environment-friendly and water-saving rotary evaporation concentration device according to claim 9, wherein the rotary motor (3), the steam compressor (7), the electric heating belt (18), the liquid level sensor (20), the steam temperature sensor (21), the steam pressure sensor (22), the feed pump, the drain pump and the check valve (23) are all in communication connection with the control panel (24).
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| CN201822159773.0U CN209734992U (en) | 2018-12-21 | 2018-12-21 | Energy-saving, environment-friendly and water-saving rotary evaporation concentration device |
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| CN201822159773.0U CN209734992U (en) | 2018-12-21 | 2018-12-21 | Energy-saving, environment-friendly and water-saving rotary evaporation concentration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109381878A (en) * | 2018-12-21 | 2019-02-26 | 北京师范大学 | A kind of water-saving rotary evaporation enrichment facility of energy conservation and environmental protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109381878A (en) * | 2018-12-21 | 2019-02-26 | 北京师范大学 | A kind of water-saving rotary evaporation enrichment facility of energy conservation and environmental protection |
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