CN220867350U

CN220867350U - Device for producing vegetable oil by rotary dynamic multistage membrane filtration

Info

Publication number: CN220867350U
Application number: CN202322593718.3U
Authority: CN
Inventors: 牛德宝; 盖莉莉; 李凯; 彭寅啸; 杭方学; 黄智�; 黄磊; 邓庆
Original assignee: Guangxi University
Current assignee: Guangxi University
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-04-30
Anticipated expiration: 2033-09-25

Abstract

The utility model discloses a device for producing vegetable oil by rotary dynamic multistage membrane filtration, which belongs to the technical field of edible oil processing and comprises a material liquid tank and a filtering mechanism; each stage of filtering mechanism comprises one or more rotary membrane groups, when the rotary membrane groups are connected in series, a forward clear liquid outlet is connected with a backward liquid inlet, a plurality of concentrated liquid outlets are converged into one concentrated liquid outlet, when the rotary membrane groups are connected in parallel, the forward clear liquid outlet and the backward clear liquid outlet are converged into one clear liquid outlet, the forward concentrated liquid outlet and the backward concentrated liquid outlet are converged into one concentrated liquid outlet, and the forward liquid inlet and the backward liquid inlet are converged into one liquid inlet; the filtering mechanisms of different stages are connected in series, the clear liquid outlet of the upper stage is communicated with the liquid inlet of the lower stage, the concentrated liquid outlet of each stage is independently or converged and then communicated with the liquid feed tank, the primary liquid inlet is communicated with the liquid feed tank through a feed pump, and the clear liquid outlet of the final stage is connected with a collecting device. According to the utility model, materials are filtered step by step through the multi-stage filtering mechanism, so that the filtering precision of the filtering device can be improved.

Description

Device for producing vegetable oil by rotary dynamic multistage membrane filtration

Technical Field

The utility model relates to the technical field of edible oil processing, in particular to a device for producing vegetable oil by rotary dynamic multistage membrane filtration.

Background

Vegetable oils are generally obtained from vegetable oils such as rapeseed, camellia seed, soybean, etc. by mechanical pressing or other solvent extraction methods, and comprise triglycerides as the main component, and non-triglyceride impurities including free fatty acids, gums, pigments, waxes, etc. The existence of impurities in the crude oil not only affects the edible value and safe storage of the grease, but also brings difficulty to deep processing of the grease and the like. Traditional chemical refining includes degumming, deacidification, decoloration and the like, chemical reagent addition caused by excessive processing and high-temperature treatment, so that thermosensitive substances and nutrient substances in the vegetable oil are removed.

The membrane separation method starts from the 60 th century of 20, has the advantages of small occupied area, no need of chemical additives, high separation efficiency, high automation control degree and the like, and is widely applied to various industrial fields. At present, the inorganic ceramic membrane starts to be explored and used in the oil industry, has the advantages of organic solvent swelling resistance, corrosion resistance, pollution resistance, easy cleaning and the like, can remove colloid, pigment substances wrapped in the colloid and some free fatty acids, and plays roles in degumming, deacidification and decoloration. The inorganic ceramic membranes are divided into tubular ceramic membranes and disc type ceramic membranes, and a tubular ceramic membrane separation device is mostly used for filtering and separating through cross flow, and membrane blocking and concentration polarization phenomena are easy to occur to high-viscosity grease system materials, so that membrane flux is reduced due to membrane pollution. The existing disc type ceramic filter device is only provided with one-stage filtration, so that the filtering effect is greatly reduced, and the unnecessary and harmful impurities are removed from the grease by accurate regulation and control for different requirements and purposes of vegetable oil, so that the quality of the finished oil reaches the national standard, and meanwhile, the beneficial components of the vegetable oil are reserved.

For example, chinese patent application publication No. CN107213800a discloses a novel cross-flow rotary ceramic membrane system, a tank body and a buffer tank are installed above a travelling car, a control system is installed at a side edge of the travelling car, a rotary ceramic membrane group with a hollow rotary spindle is arranged inside the tank body, a disc type ceramic membrane is adopted in the scheme, and the whole device can only realize single-stage filtration. For another example, chinese patent with the publication number CN207576147U discloses a multi-axis rotary cross-flow inorganic membrane filtration device, which comprises a driving hollow shaft, a plurality of driven hollow shafts, inorganic flat membrane discs, a pressure vessel, wherein each hollow shaft is arranged on a circumference of the cross section of the pressure vessel, and is engaged with each other through a transmission gear, the inorganic flat membrane discs are installed on the driving hollow shaft and each driven hollow shaft in a crossing manner, and are placed in the pressure vessel.

In view of the above, how to further improve the filtration capability of an inorganic membrane is a technical problem that the art is actually faced with in need of improvement.

Disclosure of utility model

The utility model aims to provide a device for producing vegetable oil by rotary dynamic multistage membrane filtration, which solves the problems in the prior art, and can improve the filtration precision of a filtering device by arranging a multistage filtering mechanism to filter materials step by step.

In order to achieve the above object, the present utility model provides the following solutions:

The utility model provides a device for producing vegetable oil by rotary dynamic multistage membrane filtration, which comprises a material liquid tank and a multistage filtration mechanism which are connected in sequence; each stage of the filtering mechanism comprises one or more rotary film groups, the rotary film groups of the same stage are connected in series or in parallel, when the rotary film groups of the same stage are connected in series, the forward clear liquid outlet is connected with the backward liquid inlet, the plurality of concentrated liquid outlets are converged into one concentrated liquid outlet, when the rotary film groups of the same stage are connected in parallel, the forward clear liquid outlet and the backward clear liquid outlet are converged into one clear liquid outlet, the forward clear liquid outlet and the backward clear liquid outlet are converged into one concentrated liquid outlet, and the forward liquid inlet and the backward liquid inlet are converged into one liquid inlet; the filtering mechanisms of different stages are connected in series, the clear liquid outlet of the upper stage is communicated with the liquid inlet of the lower stage, the concentrated liquid outlet of each stage is communicated with the liquid tank after being independent or collected, the primary liquid inlet is communicated with the liquid tank through a feed pump, and the clear liquid outlet of the final stage is connected with a collecting device.

Preferably, the rotary membrane group comprises a shell, a hollow rotating shaft and a filtering membrane with an interlayer, wherein the rotating shaft comprises a liquid collecting part positioned in the shell and a liquid outlet part positioned outside the shell, the liquid collecting part and the liquid outlet part are mutually communicated, the filtering membrane is positioned in the shell and installed on the liquid collecting part, the interlayer of the filtering membrane is communicated with the liquid collecting part, the liquid outlet part is connected with a rotation driving structure, the liquid outlet part is provided with a clear liquid outlet communicated with the liquid outlet space, and the shell is provided with a liquid inlet and a concentrated liquid outlet communicated with the liquid outlet of the liquid outlet space.

Preferably, the rotary membrane group adopts a vertical shell, the top of the shell is provided with the concentrated solution outlet, the rotating shaft is vertically arranged, and the clear solution outlet is arranged at the bottom of the rotating shaft.

Preferably, the rotary membrane module comprises a frame, and a plurality of rotary membrane modules are mounted on the frame side by side.

Preferably, the filter comprises a primary filter mechanism, a secondary filter mechanism and a tertiary filter mechanism which are connected in sequence, wherein the pore diameter range of the filter membrane is 0.004-2.0 mu m, and the pore diameters of the filter membranes of the filter mechanisms at all levels are gradually reduced according to the sequence of material flow filtration.

Preferably, the pore diameter of the filter membrane of the primary filter mechanism is 1.2-2 μm.

Preferably, the pore diameter of the filter membrane of the secondary filter mechanism is 0.1-1.2 μm.

Preferably, the pore diameter of the filter membrane of the three-stage filter mechanism is 0.004-0.1 μm.

Preferably, the washing tank comprises an acid washing batching tank and an alkali washing batching tank, and the acid washing batching tank and the alkali washing batching tank are respectively connected with the material liquid tanks.

Preferably, the feed pump is a peristaltic pump.

Compared with the prior art, the utility model has the following technical effects:

(1) According to the utility model, the multi-stage filtering mechanism is arranged to filter materials step by step, so that the filtering precision of the filtering device can be improved;

(2) The peristaltic pump is adopted by the feeding pump, can be better suitable for the characteristic of crude vegetable oil, is convenient for the flow of the crude vegetable oil, and can provide enough flow and filtering pressure;

(3) In the utility model, the filtering membrane is driven to rotate in the filtering process, a plurality of filtering membranes are arranged on the same rotating shaft in the same shell, the rotating shaft is connected with a common rotor pump or a pneumatic pump, the rotor pump or the pneumatic pump drives the rotating shaft and the filtering membranes to rotate to generate circulating cross flow, and the energy consumption of a motor required by the rotation of the filtering membranes is far lower than that of a feeding pump set of a traditional tubular membrane, so that the energy consumption can be obviously reduced;

(4) The utility model adopts the three-stage filtering mechanism, wherein the aperture of the filtering membrane of the first-stage filtering mechanism is 1.2-2 mu m, the aperture of the filtering membrane of the second-stage filtering mechanism is 0.1-1.2 mu m, and the aperture of the filtering membrane of the three-stage filtering mechanism is 0.004-0.1 mu m.

Drawings

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

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of the present utility model;

FIG. 3 is a schematic view of a rotary membrane module according to the present utility model;

Wherein, 1, cleaning a tank; 2. a material liquid tank; 3. a feed pump; 4. a frame; 5. rotating the membrane group; 51. a housing; 52. a rotating shaft; 53. a filter membrane; 6. a control system; 7. a liquid inlet; 8. a clear liquid outlet; 9. a concentrate outlet; 10. a primary filtering mechanism; 20. a secondary filtering mechanism; 30. and a three-stage filtering mechanism.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model aims to provide a device for producing vegetable oil by rotary dynamic multistage membrane filtration, which solves the problems in the prior art.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 1 to 3, the utility model provides a device for producing vegetable oil by rotary dynamic multistage membrane filtration, which comprises a material liquid tank 2 and a multistage filtration mechanism connected in sequence. Each stage of filtering mechanism comprises one or more rotary membrane groups 5, each rotary membrane group 5 is provided with a liquid inlet 7, a clear liquid outlet 8 and a concentrated liquid outlet 9, and when a plurality of rotary membrane groups 5 are adopted, different rotary membrane groups 5 of the same stage are connected in series or in parallel. Specifically, when connected in series, the clear liquid outlet 8 of the forward rotating membrane set 5 is connected to the liquid inlet 7 of the backward rotating membrane set 5, where forward and backward refer to the forward direction and the backward direction that are reached first and the backward direction that are reached second in the order of material flow, and the same applies hereinafter, and the plurality of concentrate outlets 9 (each rotating membrane set 5 includes one concentrate outlet 9) are collected into one concentrate outlet 9. When the rotary membrane unit is connected in parallel, the clear liquid outlet 8 of the forward rotary membrane unit 5 and the clear liquid outlet 8 of the backward rotary membrane unit 5 are converged into one clear liquid outlet 8, the concentrated liquid outlet 9 of the forward rotary membrane unit 5 and the concentrated liquid outlet 9 of the backward rotary membrane unit 5 are converged into one concentrated liquid outlet 9, and the liquid inlet 7 of the forward rotary membrane unit 5 and the liquid inlet 7 of the backward rotary membrane unit 5 are converged into one liquid inlet 7. Whether a series connection or a parallel connection is used in the single stage filtration mechanism, each stage filtration mechanism comprises a liquid inlet 7, a clear liquid outlet 8 and a concentrated liquid outlet 9. The filtering mechanisms of different stages are connected in series, the clear liquid outlet 8 of the upper stage is communicated with the liquid inlet 7 of the lower stage, the concentrated liquid outlet 9 of each stage is independently or converged and then communicated with the liquid feed tank 2, the primary liquid inlet 7 is communicated with the liquid feed tank 2 through the feed pump 3, and the clear liquid outlet 8 of the final stage is connected with a collecting device. According to the utility model, the multi-stage filtering mechanism is arranged to filter materials step by step, so that the filtering precision of the filtering device can be improved.

The clear liquid outlet 8 can be provided with a branch for returning to the feed liquid tank 2, and when the clear liquid does not meet the requirement, the clear liquid can be returned to the feed liquid tank 2 for reprocessing. In addition, the cleaning liquid can be circulated through the pipeline in the cleaning process.

As shown in fig. 3, the rotary membrane module 5 includes a housing 51, a hollow rotary shaft 52 and a filter membrane 53 having an interlayer, the rotary shaft 52 is connected with the housing 51 or a cover mounted on the housing 51 in a penetrating manner, a supporting structure for supporting the rotary shaft 52 to rotate is provided, and a sealing structure is provided at a connection position of the rotary shaft 52 and the housing 51/cover, so that the housing 51 is prevented from leaking due to the mounting of the rotary shaft 52, the housing 51 is kept sealed, and a certain pressure environment can be achieved. The shell 51 is provided with a liquid inlet 7 and a concentrated liquid outlet 9 which are communicated with the space in the shell 51, the liquid inlet 7 is connected with a clear liquid outlet 8 of the front/upper stage, the primary liquid inlet 7 is communicated with a liquid feed tank 2 through a feed pump 3, the feed pump 3 is generally used for providing the power of material flow and the filtering pressure for filtering through a filtering membrane 53, the concentrated liquid outlet 9 is communicated with the liquid feed tank 2 through a concentrated liquid return valve, and the concentrated liquid which does not pass through the filtering membrane 53 flows back to the liquid feed tank 2 for filtering again. Since the rotation shaft 52 is disposed through the housing 51, the rotation shaft 52 may include a liquid receiving portion located inside the housing 51 and a liquid discharging portion located outside the housing 51, and the liquid receiving portion and the liquid discharging portion are communicated with each other to form a passage through which the filtered clear liquid in the housing 51 flows out. The ceramic membrane adopted by the filter membrane 53 is an inorganic material, such as alumina, titanium oxide and the like, has the advantages of high temperature resistance, acid and alkali resistance and organic solvent resistance, is pollution-resistant, is easy to clean, has long operation period, and is suitable for separating materials with high concentration, high viscosity (such as an oil system) and the like. The filter membrane 53 comprises a body and an interlayer arranged in the body, i.e. under a certain pressure, liquid outside the filter membrane 53 will penetrate the filter membrane 53 into the interlayer thereof for filtering. The filter membrane 53 is located in the housing 51 and is mounted on the liquid receiving portion, and a hole is provided in the liquid receiving portion at a position corresponding to the filter membrane 53, so that the liquid receiving portion is communicated with the interlayer of the filter membrane 53, the clear liquid filtered by the filter membrane 53 can enter the liquid receiving portion, the liquid receiving portion is communicated with the liquid outlet portion, and the liquid outlet portion is provided with a clear liquid outlet 8 communicated with the space in the liquid outlet portion, so that the filtered clear liquid flows out through the clear liquid outlet 8 to be collected. The liquid outlet part is connected with a rotation driving structure, the rotation driving structure can adopt a combined mode of a rotating motor and a reduction gearbox, is connected with the outer diameter side of the liquid outlet part, drives the rotation shaft 52 to rotate through the rotation driving structure, and further drives the filter membrane 53 to rotate, and the rotating filter membrane 53 forms a certain membrane surface flow rate on the membrane surface to realize filtration.

The utility model drives the filter membrane 53 to rotate in the filtering process, and can achieve the following effects: the plurality of filter membranes 53 are arranged on the same rotating shaft 52 in the same shell 51, the rotating shaft 52 is connected with a common rotor pump or a pneumatic pump, the rotor pump or the pneumatic pump drives the rotating shaft 52 and the filter membranes 53 to rotate to generate circulating cross flow, and the energy consumption of a motor required by the rotation of the filter membranes 53 is far lower than that of a feeding pump set of a traditional tubular membrane, so that the energy consumption can be remarkably reduced.

The filter membrane 53 can be a disc type, the inner wall of the interlayer of the filter membrane 53 can be provided with diversion trenches, the diversion trenches are arranged along the radial direction, filtered clear liquid can be effectively led into the rotating shaft 52, the number of the diversion trenches is not required, and one or a plurality of diversion trenches can be arranged; the structural form of the diversion trench can be various forms such as a flat plate type, an arc type, a wing type or a flat plate curve type. The flow guide groove rotates along with the rotation of the filter membrane 53 to form a structure similar to a turbine blade, and is inclined to the rotation direction of the filter membrane 53 to be more advantageous for moving the clear liquid along the flow guide groove toward the central rotation axis 52.

The rotary membrane group 5 can adopt a vertical shell 51, the top of the shell 51 is provided with a concentrated solution outlet 9, a rotating shaft 52 is vertically arranged, and a clear solution outlet 8 is arranged at the bottom of the rotating shaft 52.

Including frame 4, frame 4 is used for rotatory membrane group 5, inside pipeline and rotation drive structure etc. and a plurality of rotatory membrane group 5 are installed side by side on frame 4, utilize frame 4 to support rotatory membrane group 5, and simultaneously, clear solution export 8 of every rotatory membrane group 5 is located frame 4, after with rotatory membrane group 5 lifting through frame 4, be convenient for clear solution export 8 and the connection of its pipeline.

The first stage filter mechanism 10, the second stage filter mechanism 20 and the third stage filter mechanism 30 are sequentially connected, the first stage filter mechanism 10 shown in fig. 2 comprises two rotating membrane groups 5 connected in parallel, the second stage filter mechanism 20 and the third stage filter mechanism 30 respectively comprise a single rotating membrane group 5, it should be noted that the structure is only a specific embodiment, other variation combinations are also possible, for example, the two rotating membrane groups 5 of the first stage filter mechanism 10 are connected in series, or the second stage filter mechanism 20 and/or the third stage filter mechanism 30 comprise rotating membrane groups 5 connected in series/parallel, etc. The aperture range of the filter membrane 53 is 0.004-2.0 mu m, the aperture of the filter membrane 53 of each stage of filter mechanism is gradually reduced according to the material flow filtration sequence, the pressure of the concentrated solution outlet 9 is 0.01-0.6 mpa, and the rotating speed of the rotating shaft 52 is 100-1200 r/min.

The aperture of the filter membrane 53 of the primary filter mechanism 10 is 1.2-2 mu m, the pressure of the concentrated solution outlet 9 is 0.01-0.1 mpa, and the rotating speed of the rotating shaft 52 is 100-300 r/min.

The aperture of the filter membrane 53 of the secondary filter mechanism 20 is 0.1-1.2 mu m, the pressure of the concentrated solution outlet 9 is 0.1-0.3 mpa, and the rotating speed of the rotating shaft 52 is 300-600 r/min.

The aperture of the filter membrane 53 of the three-stage filter mechanism 30 is 0.004-0.1 mu m, the pressure of the concentrated solution outlet 9 is 0.3-0.6 mpa, and the rotating speed of the rotating shaft 52 is 600-1200 r/min.

By setting the aperture of the filter membrane 53 in the above range, filtration of vegetable oil can be achieved on the basis of gradually decreasing the aperture in multistage filtration, and the effect of ensuring filtration efficiency can be achieved on the basis of achieving higher filtration accuracy.

The utility model is provided with a control system 6, the control system 6 belongs to a programmable logic controller (ProgrammableLogicController, PLC), has a man-machine interaction interface, and can realize full-automatic control and real-time safety monitoring. When the utility model is operated, the crude vegetable oil is poured into the feed liquid tank 2 and is started to operate under the control of the control system 6, the crude vegetable oil is pumped to different rotary membrane groups 5 in each stage of filtering mechanisms through the feed pump 3 to carry out multistage filtering purification, the filtered crude vegetable oil flows out from a clear liquid outlet 8 of the rotary membrane group 5 of the final stage filtering mechanism, and clear liquid obtained after filtering is collected and is permeate liquid of the filtered and purified vegetable oil.

The cleaning tank 1 comprises a pickling material mixing tank and an alkaline cleaning material mixing tank, and the pickling material mixing tank and the alkaline cleaning material mixing tank are respectively connected with a material liquid tank 2. After the filtering process is finished, the equipment is cleaned, and the cleaning tank 1 is started to perform CIP cleaning process under the control of the control system 6, so that the equipment and the pipeline are subjected to acid cleaning and alkali cleaning.

The feed pump 3 may be a peristaltic pump which is better suited to the characteristics of the crude vegetable oil, facilitates its flow, and provides adequate flow and filtration pressure.

The utility model provides specific embodiments as follows:

Example 1

The plant crude oil (camellia oil is taken as an example) is poured into a feed liquid tank 2 and is started to operate under the control of a control system 6, the plant crude oil is pumped to different rotary membrane groups 5 in each stage of filtering mechanisms through a feed pump 3 to carry out multistage filtering purification, the filtered plant oil flows out from a clear liquid outlet 8 of the rotary membrane groups 5 of the final stage filtering mechanism, and clear liquid obtained after filtering is collected and is permeate liquid of the plant oil after filtering purification. After the filtering process is finished, the equipment is cleaned, and the cleaning tank 1 is started to perform CIP cleaning process under the control of the control system 6, so that the equipment and the pipeline are subjected to acid cleaning and alkali cleaning.

The primary filter mechanism 10 had a pore diameter of the filter membrane 53 of 1.2 μm, a pressure of the dope outlet 9 of 0.03mpa, and a rotational speed of the rotation shaft 52 of 100r/min.

The pore diameter of the filter membrane 53 of the secondary filter mechanism 20 was 0.1. Mu.m, the pressure of the concentrate outlet 9 was 0.1mpa, and the rotational speed of the rotary shaft 52 was 400r/min.

The three-stage filtration mechanism 30 had a pore diameter of the filtration membrane 53 of 0.004 μm, a pressure of the dope outlet 9 of 0.4mpa, and a rotational speed of the rotation shaft 52 of 700r/min.

Example 2

The filtration process and the purification process were kept identical to example 1, except that:

The primary filter mechanism 10 had a filter membrane 53 with a pore diameter of 1.5 μm, a pressure of 0.05mpa at the concentrate outlet 9, and a rotational speed of the rotary shaft 52 of 150r/min.

The pore diameter of the filter membrane 53 of the secondary filter mechanism 20 was 0.5. Mu.m, the pressure of the concentrate outlet 9 was 0.2mpa, and the rotational speed of the rotary shaft 52 was 500r/min.

The three-stage filtration mechanism 30 had a pore diameter of the filtration membrane 53 of 0.05 μm, a pressure of the dope outlet 9 of 0.5mpa, and a rotation speed of the rotation shaft 52 of 900r/min.

Example 3

the primary filter mechanism 10 had a pore diameter of the filter membrane 53 of 2 μm, a pressure of the dope outlet 9 of 0.1mpa, and a rotation speed of the rotation shaft 52 of 200r/min.

The pore diameter of the filter membrane 53 of the secondary filter mechanism 20 was 1.0. Mu.m, the pressure of the concentrate outlet 9 was 0.3mpa, and the rotational speed of the rotary shaft 52 was 600r/min.

The three-stage filtration mechanism 30 had a pore diameter of the filtration membrane 53 of 0.1 μm, a pressure of the dope outlet 9 of 0.6mpa, and a rotation speed of the rotation shaft 52 of 1000r/min.

Physical and chemical index measurement was performed on the vegetable oils (camellia oil) of examples 1 to 3 which were subjected to the filtration purification according to the present utility model. The acid value is measured according to the measurement requirement of the acid value in the food of the national standard GB 5009.229-2016, the peroxide value is measured according to the measurement requirement of the peroxide value in the food of the national standard GB 5009.227-2016, the moisture and the volatile matters are measured according to the measurement requirement of the moisture and the volatile matters of the animal and vegetable oil and fat of the national standard GB 5009.236-2016, and the content of the insoluble impurities is measured according to the measurement requirement of the insoluble impurity content of the animal and vegetable oil and fat of the national standard GB/T15688-2008.

The vegetable oils (camellia oil) of examples 1 to 3 which were purified by filtration according to the present utility model were subjected to active material measurement. The squalene is determined according to the determination requirement of the squalene content in the plant oil of the agricultural standard NY/T3673-2020, the vitamin E (tocopherol) is determined according to the determination requirement of the determination of the vitamin A, D, E in the food of the national standard GB5009.82-2016, and the phytosterol is determined according to the determination requirement of the gas chromatography for determining the sterol composition and the total sterol content of the animal and plant oil of the national standard GB/T25223-2010.

TABLE 1 quality detection results of vegetable oil (camellia oil) purified by filtration according to the present utility model

As is clear from the table, the acid value, the peroxide value, the moisture, the volatile matter content and the insoluble impurity content of the vegetable oil (camellia oil) filtered and purified by the utility model are all obviously lower than the requirements of national standard GB/T11765-2018, and the camellia oil of examples 1-3 has light yellow appearance and clear transparency, which shows that the camellia oil filtered by the utility model reaches the national standard.

TABLE 2 detection results of active substances of vegetable oil (camellia oil) purified by filtration according to the present utility model

As is clear from the above table, in examples 1 to 3, the alpha-vitamin E, squalene and phytosterol of the vegetable oil (camellia oil) which has been purified by filtration according to the present utility model are all retained, which means that the camellia oil obtained by filtration according to the present utility model can retain the nutrients therein.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. The utility model provides a rotatory dynamic multistage membrane filtration device of production vegetable oil which characterized in that: comprises a material liquid tank and a multistage filtering mechanism which are connected in sequence; each stage of the filtering mechanism comprises one or more rotary film groups, the rotary film groups of the same stage are connected in series or in parallel, when the rotary film groups of the same stage are connected in series, the forward clear liquid outlet is connected with the backward liquid inlet, the plurality of concentrated liquid outlets are converged into one concentrated liquid outlet, when the rotary film groups of the same stage are connected in parallel, the forward clear liquid outlet and the backward clear liquid outlet are converged into one clear liquid outlet, the forward clear liquid outlet and the backward clear liquid outlet are converged into one concentrated liquid outlet, and the forward liquid inlet and the backward liquid inlet are converged into one liquid inlet; the filtering mechanisms of different stages are connected in series, the clear liquid outlet of the upper stage is communicated with the liquid inlet of the lower stage, the concentrated liquid outlet of each stage is communicated with the liquid tank after being independent or collected, the primary liquid inlet is communicated with the liquid tank through a feed pump, and the clear liquid outlet of the final stage is connected with a collecting device.

2. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to claim 1, wherein: the rotary membrane group comprises a shell, a hollow rotating shaft and a filtering membrane with an interlayer, wherein the rotating shaft comprises a liquid collecting part and a liquid outlet part, the liquid collecting part is positioned in the shell, the liquid outlet part is positioned outside the shell, the inner space of the liquid outlet part is mutually communicated, the filtering membrane is positioned in the shell and is installed on the liquid collecting part, the interlayer of the filtering membrane is communicated with the liquid collecting part, the liquid outlet part is connected with a rotation driving structure, the liquid outlet part is provided with a clear liquid outlet which is communicated with the inner space of the liquid outlet part, and the shell is provided with a liquid inlet and a concentrated liquid outlet which are communicated with the inner space of the shell.

3. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to claim 2, wherein: the rotary membrane group adopts a vertical shell, the top of the shell is provided with a concentrated solution outlet, the rotating shaft is vertically arranged, and a clear solution outlet is arranged at the bottom of the rotating shaft.

4. A rotary dynamic multistage membrane filtration plant oil production apparatus according to claim 3, wherein: the rotary membrane module comprises a frame, and a plurality of rotary membrane modules are arranged on the frame side by side.

5. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to any one of claims 2 to 4, wherein: the filter comprises a primary filter mechanism, a secondary filter mechanism and a tertiary filter mechanism which are sequentially connected, wherein the aperture range of a filter membrane is 0.004-2.0 mu m, and the aperture of the filter membrane of each stage of filter mechanism is gradually reduced according to the sequence of material flow filtration.

6. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to claim 5, wherein: the aperture of the filtering membrane of the primary filtering mechanism is 1.2-2 mu m.

7. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to claim 6, wherein: the aperture of the filtering membrane of the secondary filtering mechanism is 0.1-1.2 mu m.

8. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to claim 7, wherein: the aperture of the filtering membrane of the three-stage filtering mechanism is 0.004-0.1 mu m.

9. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to claim 1, wherein: the cleaning tank comprises an acid washing proportioning tank and an alkali washing proportioning tank, and the acid washing proportioning tank and the alkali washing proportioning tank are respectively connected with the material liquid tank.

10. The apparatus for producing vegetable oil by rotary dynamic multistage membrane filtration according to claim 1, wherein: the feed pump adopts a peristaltic pump.