CN101537261A

CN101537261A - Molecular distillation device

Info

Publication number: CN101537261A
Application number: CN200910029639A
Authority: CN
Inventors: 王彪; 吴利东; 沈军良; 徐军
Original assignee: JIANGSU SHAJIABANG CHEMICAL EQUIPMENT CO Ltd
Current assignee: JIANGSU SHAJIABANG CHEMICAL EQUIPMENT CO., LTD.
Priority date: 2009-03-30
Filing date: 2009-03-30
Publication date: 2009-09-23
Anticipated expiration: 2029-03-30
Also published as: CN101537261B

Abstract

The invention discloses a molecular distillation device, belonging to the technical field of medicine biochemical engineering equipment. The molecular distillation device comprises a base, an evaporator, a condenser, a cover and a film scraping device, wherein the evaporator and the condenser are arranged on the base, the cover is arranged at the upper part of the evaporator and is provided with a feed pipe, and the film scraping device is connected to the cover and comprises a rotating cage and a rotating cage drive mechanism being in transmission connection with the rotating cage. The rotating cage is arranged in a cavity between the evaporator and the condenser, and comprises a material receiving disc, a set of middle fixed rings, a bottom rotating disc, a set of fixed rods, a set of film scraping roller shafts and a set of film scraping rollers. The set of fixed rods are arranged at intervals, the upper end of each fixed rod is fixed with the material receiving disc, the middle part of each fixed rod is fixed on the set of middle fixed rings in a penetrating way, the lower end of each fixed rod is fixed with the bottom rotating disc, the set of film scraping roller shafts are arranged at intervals to be fixed with the material receiving disc, the middle fixed rings and the bottom rotating disc, and each film scraping roller is sleeved on each film scraping roller shaft. The invention is characterized in that a liquid surrounding weir is arranged on the material receiving disc, and material distributing holes are arranged on the liquid surrounding weir at intervals. The invention improves the separation efficiency, and saves the energy.

Description

Molecular distillation apparatus

Technical field

The invention belongs to the medicine biochemical engineering equipment technical field, be specifically related to a kind of molecular distillation apparatus, be applicable to the organic mixture of higher boiling, high viscosity and thermal sensitivity and separating of natural products.

Background technology

Molecular clock is commonly called short-path distillation, in view of the above, molecular distillation apparatus is commonly called short course distillation device, so-called short-path distillation is a kind of special liquid-liquid isolation technics that (residual gas pressure is less than 10pa) carries out under high vacuum, vapor molecule is heated behind the effusion liquid film through short distance back condensation rapidly on built-in condenser, what overcome routine is the constraint of VLE during traditional distillation is evaporated, make the short-path distillation process remain higher mass transfer force, thereby realize the efficient separation of material.Because molecular distillation apparatus is particularly suitable for separating the organic mixture and the natural products of higher boiling, high viscosity and thermal sensitivity, therefore obtained using widely in food, medicine, grease processing and field of petrochemical industry.

Molecular distillation apparatus is that the product of short course distillation device production is numerous, reaches hundreds of.To distill concentrated product is example: the extract (as capsanthin, lycopene, pyrethrins, lecithin, solatene and middle pharmaceutically active ingredient or the like) that the leaf neck root of synthetic vitamin class material, wool aliphatic acid, lanonol, palm oil, rice bran oil, fish oil and cod-liver oil and natural plants is arranged; With the product that removes free monomer is example: epoxy resin, Epoxy oil, Polyurethane, isocyanates, resin and plastic, plasticizer, stabilizing agent, acrylates, glycerin monostearate, two sweet esters, aliphatic acid dimer, organic intermediate (as ester class, amine synthesis of organic substance or the like) are arranged; The product that takes off flavor with decolouring is an example: it is brake oil, pumping fluid, lubricating oil and paraffin or the like that organic intermediate, lactic acid, aliphatic acid and derivative thereof, epoxy resin, Epoxy oil, vegetable wax, silicone oil, brake fluid are arranged.

As shown in the above description, the application of molecular distillation apparatus is very extensive, and comparatively common structure to the employed molecular distillation apparatus of product that removes free monomer as shown in Figure 3 in the prior art.Comprise pedestal 1, evaporimeter 2, blade applicator 3, condenser 4 and be furnished with the lid 5 of feed pipe 51, evaporimeter 2 is installed on the pedestal 1, blade applicator 3 is positioned at evaporimeter 2, and condenser 4 similarly is installed on the pedestal 1 and is positioned at blade applicator 3, and lid 5 is fixed on the top of evaporimeter 2.The blade applicator 3 of above-mentioned molecular distillation apparatus comprises rotating cage 31 and is installed in the rotating cage driving mechanism 32 that is used to order about rotating cage 31 rotations that connects with rotating cage 31 transmissions on the described lid 5, rotating cage 31 comprises a receiver 311, one group of center fixed ring 312, one end rotating disk 313, one group of fixed bar 314, one group of knifing Roller Shaft 315 and knifing roller 316, one group of fixed bar 314 is provided with at interval, the dish edge of the upper end of each fixed bar 314 and receiver 311 is fixed, the middle part wears and is fixed on one group of center fixed ring 312, and the lower end of each fixed bar 314 and end rotating disk 313 are fixing, by one group of fixed bar 314 with receiver 311, one group of center fixed ring 312 and end rotating disk 313 connect and constitute the rotating cage 31 of mouse cage shape, the interruption-like each other attitude of one group of knifing Roller Shaft 315 ground and receiver 311, center fixed ring 312 and end rotating disk 313 are fixing, and knifing roller 316 is nested with on each knifing Roller Shaft 315.When material when feed pipe 51 causes on the receiver 311, under the work of the motor 321 of the rotating cage driving mechanism 32 of blade applicator 3, drive main shaft 323 rotations through reductor 322, because main shaft 323 connects with receiver 311, therefore drive receiver 311 rotations by main shaft 322, make the rotating cage 31 of whole blade applicator 3 be in rotation status.Material to be distilled on the receiver 311 is got rid of to the inwall 21 of evaporimeter 2 under action of centrifugal force, promptly get rid of to the evaporating surface of evaporimeter 2 or claim on the heating surface, material descends at the effect lower edge of gravity inwall 21, at this moment, scraped by knifing roller 316 and to smear and form thickness liquid film relatively uniformly, on 2 pairs of inwalls 21 of evaporimeter is that material on the evaporating surface carries out in the process of heating evaporation, the molecule of the light component in the material is steamed and is arrived condenser 4, by drawing after condenser 4 condensations, thereby reach the purpose that liquid-liquid separates.

The blade applicator 3 existing shortcomings of above-mentioned molecular distillation apparatus are: because the responsibility that the receiver 311 of the rotating cage 31 of formation blade applicator 3 is taken on is the inwall 21 that material is assigned to evaporimeter 2, yet it is because comparatively concentrated from the material of feed pipe 51 introducings, material is that the feed liquid flow is bigger, receiver 311 often can't be shed inwall 21 equably with material, thereby material need be smeared down the scraping of long period of knifing roller 316, could form the uniform film of circumferencial direction thickness on the surface of inwall 21 is liquid film, like this then evaporating surface that greatly reduce evaporimeter 2 is the utilization rate of inwall 21, both reduced separative efficiency, wasted energy again.

Summary of the invention

The inwall that task of the present invention is to provide a kind of material that feed pipe can be introduced to shed evaporimeter with uniform state ground forms the even liquid film that causes of thickness fast and uses the molecular distillation apparatus of raising separative efficiency and energy savings.

Task of the present invention is finished like this, a kind of molecular distillation apparatus, comprise pedestal, be located at evaporimeter and condenser on the pedestal, be placed in the lid with feed pipe on evaporimeter top and be linked in described cover order about the blade applicator that the rotating cage driving mechanism of rotating cage motion constitutes by rotating cage with rotating cage transmission being used to of connecting, wherein, in the cavity of rotating cage between described evaporimeter and condenser, described rotating cage comprises a receiver, one group of center fixed ring, one end rotating disk, one group of fixed bar, one group of knifing Roller Shaft and knifing roller, one group of fixed bar is spaced apart from each other, the upper end and the receiver of each fixed bar are fixed, the middle part wears and is fixed on one group of center fixed ring, lower end and end rotating disk are fixed, one group of knifing Roller Shaft at interval and each other vertically concurrently with receiver, center fixed ring and end rotating disk are fixed, the knifing roller is nested with on each knifing Roller Shaft, be characterised in that: on described receiver, be provided with one and enclose the liquid weir, enclosing the spaced apart cloth hole that is provided with on the liquid weir.

In a specific embodiment of the present invention, describedly enclose the central region that the liquid weir is located at the upper surface of described receiver, the material chamber of enclosing the liquid weir is corresponding with the discharging opening of described feed pipe.

In another specific embodiment of the present invention, described cloth hole be circular hole, tri-angle-holed or＜the shape hole.

Go back in the specific embodiment of the present invention, described knifing roller completely is enclosed within on each knifing Roller Shaft.

In another specific embodiment of the present invention, described knifing roller be shaped as the pipe body.

What technical scheme provided by the present invention owing to be provided with on the receiver of the rotating cage that constitutes blade applicator had a cloth hole encloses the liquid weir, thereby can form thickness fast by the inwall that the material that feed pipe is introduced is shed evaporimeter equably and spare the liquid film that causes, not only help improving separative efficiency, but but also energy savings.

Description of drawings

Fig. 1 is a specific embodiment structure chart of molecular distillation apparatus of the present invention.

Fig. 2 is the cutaway view of Fig. 1.

Fig. 3 is the structure chart of the molecular distillation apparatus of prior art.

The specific embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the present invention program, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.

Ask for an interview Fig. 1 and Fig. 2, provided pedestal 1, central configuration at pedestal 1 has one to vacuumize jar, one evaporimeter 2 is fixed by the mounting flange 22 of its bottom and the upper edge of base 1, this evaporimeter 2 is alveolate texture and peripheral hardware heat-insulation layer 26, heat medium such as steam or conduction oil or other similar heating agent such as hot water are introduced from heat medium intake 23, after refluxing, honeycomb hole 25 draws from heat medium outlet 24, form circulation, so that to inwall 21 heating of evaporimeter 2, this inwall 21 is the evaporating surface (as follows) that contacts with material.Condenser 4 is positioned at evaporimeter 2 and is fixing or claim to be installed on the pedestal 1 with pedestal 1.Condenser 4 comprises base circle 41, bottom nozzle circle 42, one group of cooling medium inlet tube 43 and one group of cooling medium fairlead 44, last base circle 41 be hollow and constitute sap cavity 411 once, one group of cooling medium inlet tube 43 is circumferential arrangement, the upper end of each cooling medium inlet tube 43 is fixed with last base circle 41 and is communicated with described back cavity 411, and lower end and bottom nozzle circle 42 are fixing.Bottom nozzle circle 42 is a hollow, and be separated out into and out of sap cavity 422,423 by intermediate section dividing plate 421, the cooling medium that continued on admission chamber 422 is introduced interface 4221, and draw interface 4231 going out the cooling medium that continued on the sap cavity 423, aforesaid cooling medium inlet tube 43 communicates with admission chamber 422, and aforesaid cooling medium fairlead 44 with go out sap cavity 423 and communicate.Top mention medium can be water, also can be the cooling fluid of other and water equivalence.Cooling medium is introduced interface 4221 by cooling medium and is introduced admission chamber 422, enters back sap cavity 411 through cooling medium inlet tube 43, causes out sap cavity 423 by cooling medium fairlead 44 then, draws until drawn interface 4231 by cooling medium, forms circulating reflux.

Also show space disc 45 at least one on the short transverse that is configured in cooling medium inlet tube 43 and cooling medium fairlead 44 that the applicant who is different from prior art intends applying for a patent separately in the drawings, on middle space disc 45, offer recovery holes 451, at the recovery tube 452 of drawing every the material of dish in the chamber that is used for space disc 45 that continues on the recovery holes 451.The thickness of liquid film that is provided with the feed liquid that helps the attenuate condenser surface of middle space disc 45, improve the condensation efficiency of condenser, because the material of condensation is in the condenser surface continuous-flow of gravity effect lower edge, because the liquid of condensate liquid stream flow is less and viscosity is higher, liquid form shows as laminar flow, and its thickness of liquid film increases gradually with flow direction, therefore when the liquid film thickening, heat transmission resistance just increases, and the liquid film surface temperature is raise, and steam can not get effective condensation and causes separative efficiency to descend.So middle space disc 45 is set by segmentation, remove condensate liquid by middle space disc 45, can ensure that the condensate liquid that is evaporated by evaporimeter 2 obtains effective condensation at condenser 4, promptly improves the condensation efficiency of condenser.Wander about as a refugee after the condensation and drop down to reclaiming hopper 46, draw by the condensate liquid recovery tube 461 that continues reclaiming on the hopper 46 in the condensate liquid of condenser 4.Be fixed in the inwall of bottom nozzle circle 42 to aforesaid recovery hopper 46 and inclination form, the cavity volume 47 of condenser 4 is corresponding with the aforesaid jar 11 that vacuumizes.

Please continue to see Fig. 1 and Fig. 2, the blade applicator 3 that the present invention recommended comprises rotating cage 31 and rotating cage driving mechanism 32, rotating cage 31 comprises a receiver 311, one group of center fixed ring 312, one end rotating disk 313, one group of fixed bar 314, one group of knifing Roller Shaft 315 and knifing roller 316 and set up with respect to prior art one enclose liquid weir 317, one group of quantity is not subjected to the fixed bar 314 of restricted number shown in Figure 1 with state ground, interval and preferably with the setting of equidistant compartment of terrain, specifically: the upper end and receiver 311 edges of each fixed bar 314 are fixed, the middle part of each fixed bar 314 is interspersed to be fixed on one group of center fixed ring 312, and the lower end of each fixed bar 314 and end rotating disk 313 are fixing.Fairly obvious, by one group of fixed bar 314 with the center fixed ring 312 of receiver 311, one group of each interval and end rotating disk 313 these threes connect be one just as the integral body as the mouse cage.Preferred scheme is: configuration one knifing Roller Shaft 315 between two adjacent fixed bars 314, specifically: with the upper end of each knifing Roller Shaft 315 by first fixedly ear 3151 fix with the edge of receiver 311, with the middle part of each knifing Roller Shaft 315 by the quantity with center fixed ring 312 equate second fixedly ear 3152 fix with the edge of center fixed ring 312, and the lower end of each knifing Roller Shaft 315 or claim the bottom by the 3rd fixedly the edge of ear 3153 and end rotating disk 313 fix.Mode with full cover on each root knifing Roller Shaft 315 is nested with the knifing roller 316 that is shaped as tubular body, here the notion of the full cover of being said is meant that short transverse (Figure 1 shows that example) to knifing Roller Shaft 315 ground, territory, missing plot of not leaving a blank all is not nested with knifing roller 316, is that material on the evaporating surface is scraped to smear and formed uniform thickness by the inwall 21 of 316 pairs of evaporimeters 2 of knifing roller.As technical essential of the present invention: 311 of receivers towards on a side surface and be positioned at middle section and set firmly and enclose liquid weir 317, on the wall that encloses liquid weir 317 with alternate form offer cloth hole 3171, the cloth hole illustrated among the figure 3171 is for tri-angle-holed, but do not repel other shape for example circular port or hex hole or＜shape hole or the like.The material chamber 3172 that forms by enclosing liquid weir 317 enclosures is corresponding with the discharging opening 511 that covers the feed pipe 51 on 5, that is to say that the material rate to be separated that feed pipe 51 is introduced is introduced in the material chamber 3172, is drawn out to aforesaid inwall 21 by cloth hole 3171 then.

311 of receivers towards on the surface of a side, more particularly also have a terminal pad seat 3111 in the described central authorities that enclose liquid weir 317, realize connecting by this terminal pad seat 3111 with rotating cage driving mechanism 32.Motor 321 as the rotating cage driving mechanism 32 of blade applicator 3 connects with reductor 322, and take motor 321 by reductor 322 and be installed on the central authorities of covering 5 top, one end of main shaft 323 is that illustrated upper end is matched with the power output shaft of reductor 322 by axle bed 3231, and the lower end of main shaft 323 is connected with terminal pad seat 3111 by terminal pad 3232.When second adapting flange, 27 usefulness the screws on first adapting flange 52 of lid 5 bottom and evaporimeter 2 tops and add sealing gasket fixing after, the rotating cage 31 of blade applicator 3 is just between by evaporimeter 2 and condenser 4 in the formed space or title cavity that is about the 4-6cm degree.Knifing roller 316 is corresponding to the inwall 21 of evaporimeter 2, and the gap that is kept between knifing roller 316 and the inwall 21 is the thickness of liquid film that will control, is generally 0.05-0.5mm.

Still see Fig. 1 and Fig. 2, also disposing one on rotating cage 31 is different from prior art and one group of foam removal mechanism 318 that applicant's plan is applied for a patent separately, each is organized foam removal mechanism 318 and comprises a pair of splash guard 3181 and one group of foam removal baffle plate 3182, splash guard 3181 is adjacent to knifing roller 316, specifically be that the upper end of splash guard 3181 and the edge of receiver 311 are fixed, the middle part is fixing with one group of center fixed ring 312, and bottom and end rotating disk 313 are fixing.By Fig. 1 signal and according to applicant's above-mentioned explanation, should realize and know: with respect to the both sides that are located at the knifing roller 316 on each knifing Roller Shaft 315 one splash guard 3181 be arranged respectively, and be that one group of shape of cross section is＜the foam removal baffle plate 3182 of font between a pair of splash guard 3181.The edge of receiver 311 preferably is fixed in the upper end of each foam removal baffle plate 3182 with mosaic mode, the middle part also with the mosaic mode build-in on one group of center fixed ring 312, and the bottom equally with the mosaic mode build-in on end rotating disk 313.The function of above-mentioned foam removal mechanism 318 is: when knifing roller 316 in process to the material drawout on the inwall 21, having drop unavoidably splashes, and when flying to condenser with spray regime, steam molecule also can carry a large amount of drops secretly, these drops can seriously influence the purity of product after collecting on the condenser 4, promptly reduce liquid-liquid separating effect.And being provided with of splash guard 3181 and foam removal baffle plate 3182 can be removed by the vapor stream droplets entrained, because can turning to and turn back to when meeting with splash guard 3181 and foam removal baffle plate 3182 or claim to throw, drop gets back to inwall 21, little and the fireballing composition of steam molecule then can pass through by splash guard 3181 and foam removal baffle plate 3182 formed barriers and arrive condensers, therefore, the influence to product quality that drop splashes and entrainment is caused can be eliminated by foam removal mechanism 318, strengthens separating effect.

As described above, the device that is condensed condensed i.e. separation back material or title steaming are got thing and are reclaimed by middle space disc 45 and recovery hopper 46 respectively, steam except that material then along inwall 21 drop down and in being located at pedestal 1 and with the inwall of pedestal 1 fix liquid return trough 12, take over 121 and draw by the liquid that returns that continues on peripheral liquid bath 12.

The applicant narrates the course of work of the present invention in conjunction with Fig. 1 and Fig. 2, with the distillation monoglyceride is example, the full name of monoglyceride is that (English name is mono fatty acid glyceride: Monoglycerides, be called for short MG), the monoglyceride product is a kind of white wax sheet, pearl or powdery solid, and is water insoluble and be soluble in organic solvents such as chloroform, ethanol, acetone or ether.Monoglyceride can play emulsification, dispersion, froth breaking, increment, anticorrosion freezing and preservation in food such as bread, cake, steamed bun, biscuit, candy, margarine, ice cream, dairy products, meat products, bean product and beverage or the like, help improving food tissue and mouthfeel, thereby be that widely use countries in the world and the great food emulsifying agent of consumption.It is the safety product of food and drug administration (FDA) and FAO (Food and Agriculture Organization of the United Nation) and the World Health Organization (FAO/WHO) identification.In addition, monoglyceride is used as excipient and the neutral ointment of preparation or the like at pharmaceutical products; Aspect cosmetics, be mainly used in cream frost, end powder, face powder and kermes or the like; In textile industry, as textile softener (softening agent).In view of this, the large usage quantity of monoglyceride, purposes is wider, perfect along with the development of China's molecular distillation technique and equipment, the year output of China also constantly increases.

Enabling molecular distillation apparatus provided by the invention steams when getting monoglyceride, to introduce from feed pipe 51 through the liquid material that is rich in monoglyceride that the production technology in preceding road is obtained, feed and to the material chamber 3172 of enclosing liquid weir 317 by the discharging opening 511 of feed pipe 51, because the blade applicator 3 of this moment is in running order, promptly the motor 321 by rotating cage driving mechanism 32 drives main shaft 323 rotations by reductor 322, since main shaft 323 be with receiver 311 on terminal pad seat 3111 connect firmly, therefore drive terminal pad seat 3111 by main shaft 323, make rotating cage 31 rotations of blade applicator 3, in rotary course and since action of centrifugal force will expect material in the chamber 3172 from cloth hole 317 with uniform state throw to the evaporating surface of evaporimeter 2 be on the inwall 21.Meanwhile, by the material drawout on the 316 pairs of inwalls 21 of knifing roller that are under the rotation status or claim applied, at this moment, under the evaporation of evaporimeter 2, the steam molecule or the title monoglyceride molecule of overflowing in material arrive condenser 4, by condenser 4 condensations, the liquid material that is in condenser 4 tops and middle part after being condensed takes the lead in being collected and drawing collection by recovery tube 452 every dish 45 by the middle part, promptly then being dropped down and reclaimed hopper 46 by trickle gradually extremely the liquid material of not collected by middle space disc 45 of top of condenser 4 bottoms drawn collection by condensate liquid recovery tube 461.Steam except that other component the liquid material then from inwall 21 tricklings to liquid return trough 12, draw collection by returning liquid adapter 121, thereby finished whole liquid-liquid separation process.

In said process, enclose liquid weir 37 and can play material is thrown and inwall 21 equably; Knifing roller 316 is scraped the thickness of the material on the inwall 21 uniform state of smearing to ultimate attainment.Thereby can improve the evaporation efficiency of 2 pairs of materials of evaporimeter, not only can improve the output in the unit interval, and very help energy savings, for example both save heat medium, save cooling medium again condenser 4 condensations to evaporimeter 2 evaporations.In addition, because the splash guard 3181 of foam removal mechanism 318 and the synergy of foam removal baffle plate 3182 can stop effectively that drop spatters to condenser 4, thereby can play a part positive to the purity of product; Middle space disc 45 can play the effect of promoting condensation effect.

In sum, technical scheme provided by the present invention, because the rotating cage 31 to blade applicator 3 improves, more particularly, on the receiver 311 of rotating cage 31, be provided be furnished with at interval cloth hole 3171 enclose liquid weir 317, the material that comes from feed pipe 51 can't be thrown equably in the prior art and the technical problem of the inwall 21 of evaporimeter 2 thereby eliminated.

Claims

1, a kind of molecular distillation apparatus, comprise pedestal (1), be located at evaporimeter (2) and condenser (4) on the pedestal (1), be placed in the lid with feed pipe (51) (5) on evaporimeter (2) top and be linked in and order about the blade applicator (3) that the rotating cage driving mechanism (32) of rotating cage (31) motion constitutes by rotating cage (31) with rotating cage (31) transmission being used to of connecting on the described lid (5), wherein, rotating cage (31) is positioned at the cavity between described evaporimeter (2) and the condenser (4), described rotating cage (31) comprises a receiver (311), one group of center fixed ring (312), one end rotating disk (313), one group of fixed bar (314), one group of knifing Roller Shaft (315) and knifing roller (316), one group of fixed bar (314) is spaced apart from each other, upper end of each fixed bar (314) and receiver (311) are fixing, the middle part wears and is fixed on one group of center fixed ring (312), lower end and end rotating disk (313) are fixing, one group of knifing Roller Shaft (315) at interval and each other vertically concurrently with receiver (311), center fixed ring (312) and end rotating disk (313) are fixing, knifing roller (316) is nested with on each knifing Roller Shaft (315), it is characterized in that: on described receiver (311), be provided with one and enclose liquid weir (317), enclosing the upward spaced apart cloth hole (3171) that is provided with, liquid weir (317).

2, molecular distillation apparatus according to claim 1, it is characterized in that the described central region that liquid weir (317) is located at the upper surface of described receiver (311) of enclosing, the material chamber (3172) of enclosing liquid weir (317) is corresponding with the discharging opening (511) of described feed pipe (51).

3, molecular distillation apparatus according to claim 1, it is characterized in that described cloth hole (3171) for circular hole, tri-angle-holed or＜the shape hole.

4, molecular distillation apparatus according to claim 1 is characterized in that described knifing roller (316) completely is enclosed within on each knifing Roller Shaft (315).

5, according to claim 1 or 4 described molecular distillation apparatus, what it is characterized in that described knifing roller (316) is shaped as the pipe body.