CN107862975A - Molecular distillation production line instructional device - Google Patents
Molecular distillation production line instructional device Download PDFInfo
- Publication number
- CN107862975A CN107862975A CN201711218326.1A CN201711218326A CN107862975A CN 107862975 A CN107862975 A CN 107862975A CN 201711218326 A CN201711218326 A CN 201711218326A CN 107862975 A CN107862975 A CN 107862975A
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- Prior art keywords
- heating
- production line
- molecular distillation
- instructional device
- raw material
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
Abstract
The invention provides a kind of molecular distillation production line instructional device, and it includes pumped vacuum systems, molecular still, cooling system and heating system；The molecular still includes product separator, high-order head tank and blade applicator, ampoule bottle is provided with the high-order raw material top tank structure, the high-order raw material pot bottom is movably set with irony and breaks up hammer, and the irony breaks up hammer and passes through magnet adsorption on the high-order raw material top tank structure below the ampoule bottle；The heating system includes centrifugal hot oil pump, heating oil heater, heating mantle and high-level heating oil exhaust tank.The molecular distillation production line instructional device uses in vacuum and breaks up feeding manner, be advantageous to the ultrahigh vacuum of maintenance system, avoid the oxidation and pollution of raw material, high-level heating oil exhaust tank causes oil vapour to discharge in time simultaneously, the temperature fluctuation of molecular still is reduced, the device is reasonable in design, easy to operate.
Description
Technical field
The invention belongs to chemical industry instructional device field, and in particular to a kind of molecular distillation production line instructional device.
Background technology
Molecular distillation is also known as short-path distillation, is a kind of continuous steaming that non-equilibrium lock out operation is carried out under the conditions of condition of high vacuum degree
Process is evaporated, it is the separation process that gas diffusion is relied on based on the gas molecule in space escaped in liquid phase.The operation of molecular distillation
Process can be briefly outlined for：The material being distilled is continuously injected into one at a high speed on the disk of rotation, in the work of centrifugal force
Under, material is distributed on the inner surface of distillation unit.Using thermal medium it is even and continuous heat distillation unit.Injected
Raw material be evenly distributed in the inner surface of the cylinder and moved down under gravity by film-forming system.In certain temperature
Under degree and vacuum, some components are evaporated on the face of being heated, while the composition of the component in the liquid phase will change.Steamed
The material for sending out into gas is converted into liquid collection by built-in cold condenser.The heavy constituent that can not be evaporated is along evaporator madial wall stream
Go out.Because it has the advantages of Conventional espresso is incomparable, as vapo(u)rizing temperature is low, distillation pressure is low, residence time of material is short, divides
The advantages that good from effect, suitable for the concentration and purifying of HMW, higher boiling, high-viscosity material, it is widely used in oil
The physical purification in the fields such as chemical industry, medicines and health protection and separation.
But complicated, equipment manufacturing costs costliness in the instructional device according to existing equipment design be present, and due to logical
Heated frequently with heating oil, heat that oil is heated to produce that oil vapour causes to heat oil pump pumping speed and temperature is unstable and oily steaming
Contaminated vapor distillage, further, since material is commonly stored in the head tank of air, cause raw material easy quilt before it is distilled
Oxidation and pollution.Therefore, develop the distillation production line that a kind of stability is good, vacuum is higher has for training operation teaching
Important realistic meaning.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, so as to provide a kind of molecular distillation production line instructional device.
To achieve these goals, the technical solution adopted in the present invention is：A kind of molecular distillation production line instructional device,
It includes pumped vacuum systems, molecular still, cooling system and heating system；
The cooling system includes cold-trap and the first condensation water coil being arranged on inside the cold-trap, is set respectively on the cold-trap
Cold-trap waste liquid sewage draining exit, cold-trap pilot hole and vacuum pumping opening are equipped with, the vacuum pumping opening is connected with the pumped vacuum systems
Connect；
The molecular still includes product separator and the blade applicator being sealingly disposed on the product separator, described
Blade applicator includes clear glass housing and is movably arranged on the WRS- automatically cleaning roller type knifing of the clear glass enclosure interior
System, the WRS- automatically cleanings roller type scrape membranous system and are connected with stirring motor by shaft coupling, and the stirring motor is fixed on
The top of the clear glass housing；The clear glass case top is also associated with high-order head tank, the high-order head tank
Bottom be provided with feed valve；
The sealing that ampoule bottle and the ampoule bottle are provided with the high-order raw material top tank structure down, is packaged with the ampoule bottle
Raw material to be distilled, the high-order raw material pot bottom are movably set with irony and break up hammer, and the irony breaks up hammer and passes through magnet adsorption
On the high-order raw material top tank structure below the ampoule bottle；
The product separator includes separate housing and the second condensed water coil device being arranged on inside the separate housing,
Product separator pilot hole, light-end products sorting hole and heavy product sorting hole, institute are offered in the separate housing respectively
Product separator pilot hole is stated to be tightly connected with the cold-trap pilot hole by fastener and seal；
The heating system includes centrifugal hot oil pump, heating oil heater, heating mantle and high-level heating oil exhaust tank, the heating mantle
The outside of the clear glass housing is arranged on, the heating oil heater passes through the centrifugal hot oil pump and high-level heating oil
Exhaust tank is connected with the heating mantle.
Based on above-mentioned, the pumped vacuum systems includes Luo Cishi vavuum pumps and the rotary vane type vacuum being coupled in series
Pump, the Luo Cishi vavuum pumps are tightly connected with the vacuum pumping opening, and vacuum control is additionally provided with the vacuum pumping opening
Valve.
Based on above-mentioned, light-end products is fixedly installed on the light-end products sorting hole and regards cup, the heavy product separation
Heavy product is fixedly installed on hole and regards cup.
Based on above-mentioned, the light-end products is provided with light-end products valve depending on the bottom of cup, and the heavy product regards the bottom of cup
Portion is provided with heavy product valve.
Based on above-mentioned, the upper lateral part of heating mantle one offers the oily oil return opening of heating, and the side lower part of heating mantle one opens up
There is the oily upper hydraulic fluid port of heating, the oily oil return opening of heating is connected by the high-level heating oil exhaust tank with the centrifugal hot oil pump
Connect.
Based on above-mentioned, electron vacuum gage is additionally provided with the vacuum pumping opening.
Based on above-mentioned, temperature sensor and electrical heating wire are additionally provided with inside the heating oil heater.
Based on above-mentioned, the second condensed water coil device includes the upper hose being fixed in the separate housing and is connected to institute
The second condensation water coil at the top of upper hose is stated, the clear glass enclosure interior is extended at the top of the upper hose.
The present invention is compared with the prior art with prominent substantive distinguishing features and significantly progressive, specifically, tool of the invention
Have the advantage that：
Molecular distillation production line instructional device provided by the invention is used using feeding manner is broken up in vacuum, is advantageous to maintain system
The ultrahigh vacuum of system, the oxidation and pollution of raw material are avoided, while high-level heating oil exhaust tank causes oil vapour to discharge in time, drop
The low temperature fluctuation of molecular still and the vibrations of oil pump.Further, the pumped vacuum systems to form connection to connect
Luo Cishi vavuum pumps and rotary-vane vaccum pump, while the pumping speed of vavuum pump is stablized, the vacuum of equipment is effectively increased, tied
The separation distillation procedure of oxidizable material can be realized by breaking up feeding manner in conjunction vacuum.Further, the molecular distillation produces
Line concentrates in together the device manipulations such as molecular still, cold-trap and heating oil heater, convenient monitoring and operation, ripe suitable for beginner
Know the operation of various chemical industry equipments and device.Light-end products can easily observe distillation depending on cup and heavy product depending on cup simultaneously
As a result.
Brief description of the drawings
Fig. 1 is the Integral connection structure schematic diagram of molecular distillation production line instructional device provided by the invention.
Fig. 2 is cold-trap and vacuum apparatus designs schematic diagram in molecular distillation production line instructional device provided by the invention.
Fig. 3 is the molecular still structural representation in molecular distillation production line instructional device provided by the invention.
Fig. 4 is the blade applicator structural representation in molecular distillation production line instructional device provided by the invention.
Fig. 5 is the product separator structural representation in molecular distillation production line instructional device provided by the invention.
In figure：1st, high-order head tank；2nd, the first condensation water coil；3rd, cold-trap；4th, cold-trap waste liquid sewage draining exit；5th, Luo Cishizhen
Empty pump；6th, rotary-vane vaccum pump；7th, vacuum control valve；8th, vacuum pumping opening；9th, cold-trap pilot hole；10th, molecular still；11、
High-level heating oil exhaust tank；12nd, centrifugal hot oil pump；13rd, oil heater is heated；14th, stirring motor；15th, oily oil return opening is heated；16、
Heat oily upper hydraulic fluid port；17th, WRS- automatically cleanings roller type scrapes membranous system；18th, product separator；19th, blade applicator；20th, second is cold
Condensate coil pipe；21st, product separator pilot hole；22nd, light-end products regards cup；23rd, heavy product regards cup；24th, heavy product valve；
25th, light-end products valve；26th, feed valve；27th, upper hose；28th, heating mantle；29th, ampoule bottle；30th, irony breaks up hammer；31st, magnet.
Embodiment
Below by embodiment, technical scheme is described in further detail.
As shown in figure 1, the present embodiment provides a kind of molecular distillation production line instructional device, it includes pumped vacuum systems, divided
Sub- distiller 10, cooling system and heating system.
As shown in Fig. 2 the first condensation water coil that the cooling system includes cold-trap 3 and is arranged on inside the cold-trap 3
2.Cold-trap waste liquid sewage draining exit 4, cold-trap pilot hole 9 and vacuum pumping opening 8, the vacuum suction are respectively arranged with the cold-trap 3
Mouth 8 is connected with the pumped vacuum systems.
Wherein, the pumped vacuum systems includes forming the Luo Cishi vavuum pumps 5 and rotary-vane vaccum pump 6 of connection with series connection,
The Luo Cishi vavuum pumps 5 are tightly connected with the vacuum pumping opening 8, and vacuum control is additionally provided with the vacuum pumping opening 8
Valve 7 and electron vacuum gage.
As shown in figure 3, the molecular still 10 separates including product separator 18 with the product is sealingly disposed in
Blade applicator 19 on device 18.Specifically, as shown in figure 4, the blade applicator 19 includes clear glass housing and is movably arranged on
The WRS- automatically cleaning roller types of the clear glass enclosure interior scrape membranous system 17.The WRS- automatically cleanings roller type scrapes membranous system
17 are connected with stirring motor 14 by shaft coupling, and the stirring motor 14 is fixed on the top of the clear glass housing.It is described
Clear glass case top is also associated with high-order head tank 1, and the bottom of the high-order head tank 1 is provided with feed valve 26.
The sealing of ampoule bottle 29 and the ampoule bottle is provided with the inwall of high-order head tank 1 down, the ampoule bottle
Raw material to be distilled is packaged with 29, the high-order bottom of head tank 1 is movably set with irony and breaks up hammer 30, and the irony breaks up hammer
30 are adsorbed on the inwall of high-order head tank 1 below the ampoule bottle 29 by magnet 31.
As shown in figure 5, the product separator 18 includes separate housing and be arranged on inside the separate housing the
Two condensed water coil devices.Product separator pilot hole 21, light-end products sorting hole are offered in the separate housing respectively
With heavy product sorting hole.The product separator pilot hole 21 passes through fastener and seal and the cold-trap pilot hole 9
It is tightly connected.The second condensed water coil device includes the upper hose 27 being fixed in the separate housing and is connected to described
The second condensation water coil 20 at the top of upper hose 27.The top of upper hose 27 is extended in the clear glass housing
Portion.
Light-end products is fixedly installed on the light-end products sorting hole and regards cup 22, is fixed on the heavy product sorting hole
It is provided with heavy product and regards cup 23.The light-end products is provided with light-end products valve 25, the heavy product depending on the bottom of cup 22
Bottom depending on cup 23 is provided with heavy product valve 24；The bottom of light-end products valve 25 is connected with light-end products tank；The heavy
The bottom of product valve 24 is connected with heavy product tank.
The heating system includes centrifugal hot oil pump 12, heating oil heater 13, heating mantle 28 and high-level heating oil exhaust tank
11.The heating mantle 28 is arranged on the outside of the clear glass housing.The upper lateral part of heating mantle 28 1 offers heating oil
Oil return opening 15, the side lower part of heating mantle 28 1 offer the oily upper hydraulic fluid port 16 of heating.The oily oil return opening 15 of heating is by described
High-level heating oil exhaust tank 11 is connected with the centrifugal hot oil pump 12.The centrifugal hot oil pump 12 passes through the heating oil
Spit of fland 13 is connected with the oily upper hydraulic fluid port 16 of heating.Temperature sensor and electrical heating are additionally provided with inside the heating oil heater 13
Silk.
When the molecular distillation production line instructional device provided using the present embodiment carries out practical operation, concrete operation step is such as
Under：
（1）Check preparation
Check respectively for the cold-trap 3, light-end products tank, whether residual liquid discharges totally in heavy product tank, check the height
Conduction oil liquid level in oily exhaust tank 11 is heated in position, makes its internal heat conduction oil volume between the capacity of high-level heating oil exhaust tank 11
1/3rd to 2/3rds.
（2）System prerun leak test
All valves of pumped vacuum systems are closed, open general supply, press vavuum pump button, start pumped vacuum systems, detection is taken out true
Empty set system whether gas leakage, it is air tight after close pumped vacuum systems.
（3）Charging and distillation procedure
The first step：Raw material to be distilled is encapsulated in ampoule bottle by ampoule bottle heat sealing machine, then fixed the ampoule bottle 29
In the high-order inwall of head tank 1, and control the glass fiber of the ampoule bottle down, while in the high-order bottom of head tank 1
It is provided with irony and breaks up hammer 30, the irony is broken up hammer 30 and adsorbed by magnet 31 in the high position below the ampoule bottle 29
On the inwall of head tank 1.
Second step：The heating oil heater 13 is opened, is adjusted according to process condition and controls heating oil temperature and flow；Then
Condensed water is passed through into the described first condensation water coil 2 and the second condensation water coil 20 respectively to be cooled down.
3rd step：Pumped vacuum systems is opened, whole production system is kept a certain degree of vacuum.
4th step：After system reaches predetermined temperature and vacuum, driven with side wall of the magnet 31 across high-order head tank 1
Irony breaks up hammer 30 and slides and beat the closure part of ampoule bottle 29, seals and is pounding lower rupture, raw material passes through breach
Flow out into inside molecular still 10；Then using rotate the WRS- automatically cleanings roller type scrape membranous system 17 start molecule
Separated is tested, and notices that observation regards cup product stream artificial situation in experimentation.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (8)
- A kind of 1. molecular distillation production line instructional device, it is characterised in that：It includes pumped vacuum systems, molecular still, cooling System and heating system；The cooling system includes cold-trap and the first condensation water coil being arranged on inside the cold-trap, is set respectively on the cold-trap Cold-trap waste liquid sewage draining exit, cold-trap pilot hole and vacuum pumping opening are equipped with, the vacuum pumping opening is connected with the pumped vacuum systems Connect；The molecular still includes product separator and the blade applicator being sealingly disposed on the product separator, described Blade applicator includes clear glass housing and is movably arranged on the WRS- automatically cleaning roller type knifing of the clear glass enclosure interior System, the WRS- automatically cleanings roller type scrape membranous system and are connected with stirring motor by shaft coupling, and the stirring motor is fixed on The top of the clear glass housing；The clear glass case top is also associated with high-order head tank, the high-order head tank Bottom be provided with feed valve；The sealing that ampoule bottle and the ampoule bottle are provided with the high-order raw material top tank structure down, is packaged with the ampoule bottle Raw material to be distilled, the high-order raw material pot bottom are movably set with irony and break up hammer, and the irony breaks up hammer and passes through magnet adsorption On the high-order raw material top tank structure below the ampoule bottle；The product separator includes separate housing and the second condensed water coil device being arranged on inside the separate housing, Product separator pilot hole, light-end products sorting hole and heavy product sorting hole, institute are offered in the separate housing respectively Product separator pilot hole is stated to be tightly connected with the cold-trap pilot hole by fastener and seal；The heating system includes centrifugal hot oil pump, heating oil heater, heating mantle and high-level heating oil exhaust tank, the heating mantle The outside of the clear glass housing is arranged on, the heating oil heater passes through the centrifugal hot oil pump and high-level heating oil Exhaust tank is connected with the heating mantle.
- 2. molecular distillation production line instructional device according to claim 1, it is characterised in that：The pumped vacuum systems includes The Luo Cishi vavuum pumps and rotary-vane vaccum pump being coupled in series, the Luo Cishi vavuum pumps and the vacuum pumping opening are close Envelope is connected, and vacuum control valve is additionally provided with the vacuum pumping opening.
- 3. molecular distillation production line instructional device according to claim 2, it is characterised in that：The light-end products sorting hole On be fixedly installed light-end products and regard cup, heavy product is fixedly installed on the heavy product sorting hole and regards cup.
- 4. molecular distillation production line instructional device according to claim 3, it is characterised in that：The light-end products regards cup Bottom is provided with light-end products valve, and the heavy product is provided with heavy product valve depending on the bottom of cup.
- 5. molecular distillation production line instructional device according to claim 4, it is characterised in that：The upper lateral part of heating mantle one The oily oil return opening of heating is offered, the side lower part of heating mantle one offers the oily upper hydraulic fluid port of heating, and the oily oil return opening of heating passes through The high-level heating oil exhaust tank is connected with the centrifugal hot oil pump.
- 6. molecular distillation production line instructional device according to claim 5, it is characterised in that：In the vacuum pumping opening also It is provided with electron vacuum gage.
- 7. molecular distillation production line instructional device according to claim 6, it is characterised in that：Inside the heating oil heater also It is provided with temperature sensor and electrical heating wire.
- 8. molecular distillation production line instructional device according to claim 7, it is characterised in that：Second condensed water coil device Including the upper hose that is fixed in the separate housing and the second condensation water coil being connected at the top of the upper hose, it is described on The clear glass enclosure interior is extended at the top of water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218326.1A CN107862975A (en) | 2017-11-28 | 2017-11-28 | Molecular distillation production line instructional device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218326.1A CN107862975A (en) | 2017-11-28 | 2017-11-28 | Molecular distillation production line instructional device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107862975A true CN107862975A (en) | 2018-03-30 |
Family
ID=61703656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711218326.1A Pending CN107862975A (en) | 2017-11-28 | 2017-11-28 | Molecular distillation production line instructional device |
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| CN (1) | CN107862975A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103275743A (en) * | 2013-03-28 | 2013-09-04 | 枣庄矿业(集团)有限责任公司 | Extraction kettle apparatus for separating coal tar through mild extraction method |
| CN104784956A (en) * | 2015-03-06 | 2015-07-22 | 兰州空间技术物理研究所 | Ultrahigh vacuum molecular distillation equipment |
| CN105582686A (en) * | 2014-11-14 | 2016-05-18 | 成都市创为凯科技信息咨询有限公司 | Centrifugal-type molecular distillation system |
| CN205351770U (en) * | 2015-12-30 | 2016-06-29 | 常德华馥生物技术有限公司 | Novel electrical heating oil device |
| CN206254607U (en) * | 2016-10-05 | 2017-06-16 | 秦皇岛可视自动化设备有限公司 | A kind of three chamber solar module laminating machinees |
| CN206381662U (en) * | 2016-08-31 | 2017-08-08 | 佛山市南海中南药化厂 | A kind of distilling apparatus of vanillic aldehyde |
| CN208351794U (en) * | 2017-11-28 | 2019-01-08 | 河南莱帕克化工设备制造有限公司 | Molecular distillation production line instructional device |
-
2017
- 2017-11-28 CN CN201711218326.1A patent/CN107862975A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103275743A (en) * | 2013-03-28 | 2013-09-04 | 枣庄矿业(集团)有限责任公司 | Extraction kettle apparatus for separating coal tar through mild extraction method |
| CN105582686A (en) * | 2014-11-14 | 2016-05-18 | 成都市创为凯科技信息咨询有限公司 | Centrifugal-type molecular distillation system |
| CN104784956A (en) * | 2015-03-06 | 2015-07-22 | 兰州空间技术物理研究所 | Ultrahigh vacuum molecular distillation equipment |
| CN205351770U (en) * | 2015-12-30 | 2016-06-29 | 常德华馥生物技术有限公司 | Novel electrical heating oil device |
| CN206381662U (en) * | 2016-08-31 | 2017-08-08 | 佛山市南海中南药化厂 | A kind of distilling apparatus of vanillic aldehyde |
| CN206254607U (en) * | 2016-10-05 | 2017-06-16 | 秦皇岛可视自动化设备有限公司 | A kind of three chamber solar module laminating machinees |
| CN208351794U (en) * | 2017-11-28 | 2019-01-08 | 河南莱帕克化工设备制造有限公司 | Molecular distillation production line instructional device |
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