Short-path distillation equipment for producing unsaturated fatty acid monoglyceride and unsaturated fatty acid diglyceride

Abstract

The utility model discloses short-path distillation equipment for producing unsaturated mono-and diglycerol fatty acid esters, which comprises an evaporator, a wiped film component, a condenser component and a nitrogen nozzle, a jacket type temperature control layer is arranged on the outer wall of the evaporator, and a temperature control medium is introduced into the jacket type temperature control layer; the film scraping assembly is vertically arranged in the evaporator and comprises a rotatable center shaft and a plurality of sets of inclined scraping plates arranged in the axial direction of the center shaft, and the scraping plates are attached to the inner wall face of the evaporator. The condenser assembly is connected to the top of the evaporator and comprises a conical condensation cover, a corrugated plate structure is arranged on the surface of the conical condensation cover to increase the heat exchange area, and cooling pipelines are evenly distributed in the conical condensation cover; the nitrogen nozzle is arranged above the condenser assembly, and when the nitrogen nozzle sprays towards the surface of the condensation cover, a protective air curtain distributed along the condensation surface is formed, so that steam oxidation is prevented. The technical scheme of the utility model aims to improve the recovery efficiency and purity of products.

Description

Technical Field

[0001] This utility model relates to the field of distillation equipment technology, and in particular to a short-path distillation apparatus for producing unsaturated mono- and diglyceride fatty acid esters. Background Technology

[0002] Unsaturated mono- and diglyceride fatty acid esters are important functional lipid materials widely used in food, pharmaceuticals, cosmetics, and fine chemicals. Their production often requires short-path distillation to separate and purify the target product, removing impurities and improving purity. While traditional short-path distillation equipment can achieve the separation of unsaturated lipids to some extent, the following technical problems still exist:

[0003] On the one hand, existing equipment has a simple condenser structure and low condensation efficiency, which easily leads to steam stagnation on the condenser surface or backflow, affecting the separation effect. On the other hand, unsaturated fatty acid ester components are highly susceptible to oxidation and deterioration under high temperature and oxygen conditions, and conventional short-path distillation equipment lacks effective anti-oxidation measures, resulting in a decline in product quality. In addition, some traditional scraping film systems have a simple design and insufficient scraping efficiency, which easily leads to local overheating and coking of materials, further affecting the stability of the distillation process and product yield. Utility Model Content

[0004] The main purpose of this invention is to provide a short-path distillation apparatus for producing unsaturated mono- and diglyceride fatty acid esters, aiming to improve product recovery efficiency and purity.

[0005] To achieve the above objectives, this utility model proposes a short-path distillation apparatus for producing unsaturated mono- and diglyceride fatty acid esters, comprising:

[0006] An evaporator, wherein the outer wall of the evaporator is provided with a jacketed temperature control layer, and the jacketed temperature control layer is filled with a temperature control medium to achieve evaporation temperature control;

[0007] A scraping film assembly is vertically disposed inside the evaporator and includes a rotatable central shaft and multiple sets of inclined scrapers arranged axially along the central shaft. The scrapers are in contact with the inner wall of the evaporator and are used to dynamically scrape off and renew the evaporation film.

[0008] A condenser assembly is connected to the top of the evaporator. The condenser assembly includes a conical condenser shroud. The surface of the conical condenser shroud is provided with a corrugated plate structure to increase the heat exchange area. Cooling pipes are evenly distributed inside the conical condenser shroud for circulating the condensing medium.

[0009] A nitrogen nozzle is arranged above the condenser assembly, and when the nitrogen nozzle sprays towards the surface of the condensing cover, a protective air curtain is formed along the condensing surface to prevent vapor oxidation.

[0010] In a possible implementation, a vacuum interface is further included, which is connected to the evaporator for vacuumizing the inside of the evaporator.

[0011] In a possible implementation, the edge of the scraper is provided with a ceramic sheet, and the ceramic sheet is attached to the inner wall of the evaporator.

[0012] In a possible implementation, the corrugated plate structure is regularly arranged with alternating peaks and valleys, and the corrugated direction is consistent with the condensate flow direction.

[0013] In a possible implementation, the cooling pipeline is distributed at different height positions inside the condensing cover to form multi-level cooling.

[0014] In a possible implementation, the nitrogen nozzle is of a ring-shaped distribution structure and is uniformly arranged in the circumferential direction of the condensing cover.

[0015] In a possible implementation, the bottom of the evaporator is further provided with a condensate collection outlet and a material residue outlet.

[0016] The technical scheme of the utility model realizes instantaneous condensation of vapor by arranging a corrugated plate structure conical condensing cover on the top of the evaporator and embedding a micro cooling pipeline inside the condensing cover, significantly improves the condensation efficiency, and sets a nitrogen nozzle on the top of the condensing cover, effectively prevents oxidation and deterioration of unsaturated fatty acids by forming an air curtain isolation layer, arranges a plurality of scraper assembly groups in an inclined manner inside the evaporator, fixes ceramic sheets on the edges of the scrapers, ensures close contact with the inner wall of the evaporator, and improves the scraping film uniformity and wear resistance, and at the same time, the evaporator is provided with a jacket type temperature control structure outside, which can realize accurate regulation and control of the evaporation temperature, thereby ensuring the stability and efficiency of the material evaporation process. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for ordinary skilled in the art, other drawings can be obtained according to the structure shown in the drawings without creative labor.

[0018] Figure 1 It is a structural schematic view of an embodiment of the utility model.

[0019] Explanation of reference numerals:

[0020] 10, evaporator; 11, jacketed temperature control layer; 20, wiped film assembly; 21, central shaft; 22, scraper; 23, ceramic sheet; 30, condenser assembly; 31, conical condensing cover; 31a, corrugated plate structure; 40, nitrogen nozzle; 50, vacuum interface; 60, condensate collection outlet; 70, material residue outlet.

[0021] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0023] In view of the problems in the background art, in combination with the drawings Figure 1 The utility model discloses a short path distillation equipment for producing unsaturated mono and di-glycerol fatty acid esters, comprising:

[0024] An evaporator 10 is provided with a jacketed temperature control layer 11 on the outer wall, and a temperature control medium is circulated in the jacketed temperature control layer 11 to control the evaporation temperature.

[0025] A wiped film assembly 20 is vertically arranged in the evaporator 10, comprising a rotatable central shaft 21 and a plurality of inclined scrapers 22 arranged along the axial direction of the central shaft 21. The scrapers 22 are in close contact with the inner wall of the evaporator 10 to dynamically remove and update the evaporation film.

[0026] A condenser assembly 30 is connected to the top of the evaporator 10. The condenser assembly 30 comprises a conical condensing cover 31, and the surface of the conical condensing cover 31 is provided with a corrugated plate structure 31a to increase the heat exchange area. Cooling pipes (not shown) are uniformly arranged in the conical condensing cover 31 to circulate the condensing medium.

[0027] A nitrogen nozzle 40 is arranged above the condenser assembly 30. When the nitrogen nozzle 40 sprays towards the surface of the condensing cover, a protective air curtain is formed along the condensing surface to prevent vapor oxidation.

[0028] The outer wall of the evaporator 10 is covered with a jacketed temperature control layer 11. A temperature control medium, such as heat conducting oil, water or other cooling / heating medium, flows inside the jacketed temperature control layer 11 to precisely control the wall temperature of the evaporator 10, thereby providing a stable evaporation environment for the material. The wiped film assembly 20 is arranged inside the evaporator 10 and includes a rotatable central shaft 21 and multiple groups of inclined scrapers 22 arranged uniformly along the central shaft 21. The scrapers 22 are in close contact with the inner wall of the evaporator 10. Under the driving of the central shaft 21, the scrapers 22 dynamically scrape off the material film on the wall of the evaporator 10, constantly update the evaporation surface, improve the heat transfer efficiency and evaporation rate, and avoid local overheating or coking of the material. The condenser assembly 30 is connected to the top of the evaporator 10 and adopts a conical condensing cover 31 structure. The surface of the cover is designed as a corrugated plate structure 31a, which significantly increases the heat exchange surface area. The inside of the cover is uniformly provided with cooling pipelines (not shown). Cooling medium, such as chilled water or glycol solution, circulates in the pipelines to make the rising vapor quickly condense into liquid, reducing the secondary evaporation phenomenon. The nitrogen gas nozzle 40 is arranged above the condenser assembly 30 and the spraying direction is directed towards the surface of the condensing cover. When the nitrogen gas is sprayed, a uniform gas curtain isolation layer is formed on the condensing surface to prevent the unsaturated fatty acid material from being oxidized by contacting with oxygen in the air at high temperature.

[0029] In one possible implementation, a vacuum interface 50 is further included, which is connected to the evaporator 10 for vacuumizing the inside of the evaporator 10.

[0030] In this embodiment, the vacuum interface 50 is arranged at a proper position (e.g. upper or middle part) of the evaporator 10 and is connected to a vacuum pump system through pipelines. Through the vacuumizing operation, the pressure inside the evaporator 10 is reduced, so that the material can be evaporated at a lower temperature, avoiding the destruction of the structure of the unsaturated fatty acid caused by high temperature, and significantly improving the efficiency and purity of the distillation separation.

[0031] In one possible implementation, the edge of the scraper 22 is provided with a ceramic sheet 23, which is in close contact with the inner wall of the evaporator 10.

[0032] In this embodiment, the ceramic sheet 23 (such as alumina ceramic, silicon nitride ceramic or the like) is in close contact with the inner wall of the evaporator 10. Under the driving of the central shaft 21, the ceramic sheet 23 can realize high wear resistance and low friction wiped film effect. The ceramic material is resistant to high temperature and corrosion, which significantly prolongs the service life of the scraper 22 assembly, ensures the long-term stability of the wiped film effect, and further improves the reliability and service life of the equipment.

[0033] In one possible implementation, the corrugated plate structure 31a is regularly arranged with alternating wave crests and troughs, and the corrugated direction is consistent with the flow direction of the condensing liquid.

[0034] In the embodiment, the corrugated plates are arranged in regular peaks and valleys, and the corrugated direction is consistent with the flow direction of the condensed liquid, i.e. along the natural flow direction of the liquid. This design can quickly guide the condensed liquid downward along the corrugated track, avoid the retention of liquid film, improve the condensation speed, and further enhance the turbulent effect of the heat exchange surface to improve the condensation efficiency.

[0035] In a possible implementation, the cooling pipelines (not shown) are distributed at different height positions inside the condensing cover to form multiple levels of cooling.

[0036] In the embodiment, the cooling pipelines (not shown) are distributed at different height positions inside the condensing cover to form multiple levels of cooling.

[0037] In a possible implementation, the nitrogen gas nozzle 40 is in a ring-shaped distribution structure and is uniformly arranged along the circumference of the condensing cover.

[0038] In the embodiment, the nitrogen gas nozzle 40 is in a ring-shaped distribution structure and is uniformly arranged with a plurality of jet holes along the circumference of the condensing cover, and the jet holes are obliquely directed to the surface of the condensing cover. The nitrogen gas flow uniformly covers the entire condensing surface to form a continuous protective gas curtain, maximally reduces the contact between the steam and the air, prevents the oxidation reaction, and improves the product quality and stability.

[0039] In a possible implementation, the bottom of the evaporator 10 is further provided with a condensed liquid collection outlet 60 and a material residue outlet 70.

[0040] In the embodiment, two outlets are further arranged at the bottom of the evaporator 10 to collect the condensed liquid and discharge the residue, respectively. The condensed liquid collection outlet 60 is arranged at the center of the bottom of the evaporator 10 to recover the high-purity monoglyceride fatty acid ester product after condensation. The material residue outlet 70 is arranged beside the condensed liquid collection outlet and is specially used to discharge the high-boiling-point components or impurity residues that are not evaporated, so as to facilitate the automatic and continuous operation of the system and improve the production efficiency.

[0041] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, 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, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0042] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A short path distillation apparatus for producing unsaturated mono-, di- glycerol fatty acid esters, characterized in that, The application relates to a device for producing high-purity liquid ammonia, which comprises the following parts: an evaporator, the outer wall of which is provided with a jacketed temperature control layer, and the jacketed temperature control layer is internally communicated with a temperature control medium to realize evaporating temperature control; a wiped film assembly, which is vertically arranged in the evaporator and comprises a rotatable central shaft and a plurality of inclined scrapers arranged along the central shaft in the axial direction, the scrapers are attached to the inner wall of the evaporator and are used for dynamically scraping and renewing the evaporating film; a condenser assembly, which is connected to the top of the evaporator, the condenser assembly comprises a conical condensing cover, the surface of the conical condensing cover is provided with a corrugated plate structure to increase the heat exchange area, and the inside of the conical condensing cover is uniformly provided with cooling pipelines for condensing medium circulation; a nitrogen gas nozzle, which is arranged above the condenser assembly, when the nitrogen gas nozzle sprays towards the surface of the condensing cover, a protective gas curtain is formed along the condensing surface to prevent vapor oxidation.

2. The short path distillation apparatus for producing unsaturated mono-, di- glycerol fatty acid esters according to claim 1, characterized in that, The device further comprises a vacuum interface, which is communicated with the evaporator and is used for vacuumizing the inside of the evaporator.

3. The short path distillation apparatus for producing unsaturated mono-, di- glycerol fatty acid esters according to claim 1, characterized in that, The edges of the scrapers are provided with ceramic sheets, and the ceramic sheets are attached to the inner wall of the evaporator.

4. The short path distillation apparatus for producing unsaturated mono-, di- glycerol fatty acid esters according to claim 1, characterized in that, The corrugated plate structure is regularly arranged with alternating wave crests and wave troughs, and the corrugated direction is consistent with the condensing liquid flow direction.

5. The short path distillation apparatus for producing unsaturated mono-, di- glycerol fatty acid esters according to claim 1, characterized in that, The cooling pipelines are distributed at different height positions in the inside of the condensing cover to form multi-level cooling.

6. The short path distillation apparatus for producing unsaturated mono-, di- glycerol fatty acid esters according to claim 1, characterized in that, The nitrogen gas nozzle is an annular distribution structure and is uniformly arranged along the circumference of the condensing cover.

7. The short path distillation apparatus for the production of unsaturated mono- and diglycerides of fatty acids according to any one of claims 1 to 6, characterized in that The bottom of the evaporator is further provided with a condensing liquid collecting outlet and a material residue outlet.

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