Degreased edible oil and production process and equipment thereof

Abstract

The invention discloses degreased edible oil and a production process and equipment thereof, and relates to the technical field of edible oil degreasing, and the production process comprises the following steps: step 1, preheating crude oil: conveying the crude oil to be degreased into a heater by using a crude oil conveying pump, heating to 30-50 DEG C, and keeping the constant temperature for 1-2 minutes to destroy original solid crystal grains; step 2, cooling crystallization; step 3; and filtering and degreasing. According to the preparation method of the degreased edible oil, sectional type cooling crystallization is adopted, and the diatomite is used as a crystal nucleus in the second section in combination with corollary equipment, so that the crystallization rate is increased, and the fat content is reduced; a physical method is adopted for degreasing and refining, no chemical additive is added in the whole production process, nutritional ingredients and flavor substances of the edible oil are reserved as much as possible, and the prepared edible oil is safe and healthy.

Description

Technical Field

[0001] The present invention relates to the technical field of edible oil degreasing, in particular to defatted edible oil and a production process and equipment thereof. Background Art

[0002] Edible oil is a basic material required in the food processing industry. It is generally obtained from plant seeds. The crude oil directly extracted from plant seeds contains impurities such as free fatty acids, phospholipids, pigments, and small plant tissue fragments. In order to meet the needs of production and life, crude oil must be refined and purified before it can be eaten or used as a raw material for industrial production. With the advancement and development of food science and technology, higher requirements are placed on the degreasing of edible oil.

[0003] In the existing technology, the degreasing methods of edible oil mainly include chemical refining degreasing and physical refining degreasing. Chemical refining degreasing has a high oil yield and is cheap, but the solvent introduced in the preparation process may have certain residues, which poses potential risks to the environment and health. Physical refining degreasing mainly includes pressing and centrifugal separation. The pressing method is simple to operate, can retain flavor substances and nutrients to the greatest extent, and is pure, natural and pollution-free; however, the pressing method has a relatively low oil yield and requires a certain amount of equipment and energy. In addition, after pressing, the crude oil is filtered using a degreasing cloth. Lipids will accumulate on the surface of the degreasing cloth and need to be replaced regularly, affecting the degreasing efficiency. The centrifugal separation method also requires equipment and energy and has a limited scope of application.

[0004] Therefore, in view of the current situation and requirements of edible oil refining and defatting, it is very necessary to design a defatted edible oil and its production process and supporting equipment that do not require the addition of chemical additives, are easy to operate, have high production efficiency, and the prepared edible oil does not contain other impurities. Summary of the Invention

[0005] The purpose of the present invention is to provide defatted edible oil and a production process and equipment thereof in order to solve the problems existing in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a defatted edible oil, the production process of which comprises the following steps: Step 1: Preheat the crude oil. Use the crude oil delivery pump to deliver the degreased crude oil to the heater, heat it to 30-50°C, and keep the constant temperature for 1-2 minutes to destroy the original solid grains. Step 2: Cooling crystallization, the crude oil preheated in step 1 is pumped into a defatted crystallization tank and crystallized using a two-stage cooling method; the first cooling stage is cooling from 30°C to 13-15°C within 12-24 hours; the second cooling stage is mixing 200-300 mesh diatomaceous earth and defatted edible oil in a solid-liquid ratio of 1:5-15, and then adding them as crystallization nuclei to the crystallization tank according to the proportion, using slow stirring to slowly cool to 0-2°C over 8-20 hours, slowly stirring, and keeping the temperature for 36-48 hours to form stable crystals; Step three: filtering and defatting, filtering the crude edible oil after crystallization in the above step two through a filtering device to achieve solid-liquid separation of solid fat and liquid oil, and the separated solid fat is discharged and collected through the discharge port, and the separated liquid oil is the defatted edible oil.

[0007] The production process of defatted edible oil comprises the following steps: the heat preservation and crystal growth process in step 2 adopts slow stirring with a stirring speed of 10 to 15 r / min; the amount of diatomaceous earth added is 0.5 to 1.5% of the mass of the edible oil to be defatted; and the filtration pressure in step 3 is 0.15 to 0.35 MPa.

[0008] The preparation equipment of defatted edible oil, the filtering device used in step 3, includes a tank body, a tank cover is installed on the top of the tank body, a stirring motor is installed on the top of the tank cover, the output end of the stirring motor is connected to the stirring shaft, the top of the tank cover is located on one side of the stirring motor and is provided with a feed port, the outer wall of the tank body is sleeved with a jacket, the outer wall of the jacket is fixedly connected to a liquid inlet pipe and a liquid outlet pipe, the bottom end of the tank body is provided with a discharge port, the outer wall of the discharge port is installed with a valve, and the oil discharged from the discharge port is filtered through a filtering mechanism. The filter mechanism includes a filter box, the filter box is fixedly connected to the bottom end of the discharge port, the inner wall of the filter box is installed with a filter plate, the outer wall of the filter box is located on one side of the filter plate and has an opening, the outer wall of the filter box is located on one side of the opening and a collection box is installed on the outer wall of the filter box on one side of the opening, the inner wall of the filter box is located above the filter plate and a limiting column and a reciprocating screw rod are provided, the limiting column is fixedly connected to the interior of the filter box, the reciprocating screw rod is rotatably connected to the filter box, the outer wall of the filter box is fixedly connected to a connecting frame, the outer wall of the connecting frame is installed with a driving motor, the output end of the driving motor is connected to a connecting shaft, and the collection box is installed on the outer wall of the filter box through a mounting mechanism.

[0009] As a further solution of the present invention: the filter mechanism also includes a movable seat, the movable seat is slidably connected to the reciprocating screw rod and the outer wall of the limit column, the inner wall of the movable seat is slidably connected to a scraper, and the outer walls of both sides of the scraper are fixedly connected to the limit blocks, the outer wall of the movable seat is provided with a limit groove for the limit block to slide, the two ends of the scraper are fixedly connected to the sliding rod, and the inner wall of the filter box is provided with a slide groove for the sliding rod to slide, and the slide groove is composed of two transverse grooves and two inclined grooves, the interior of the filter box is slidably connected to an inclined block extending to the inner cavity of the transverse groove, a first spring is connected between the inclined block and the filter box, and the outer wall of the inclined block is fixedly connected to the inclined plate.

[0010] As a further solution of the present invention: the mounting mechanism includes a mounting slot, the mounting slot is opened on the outer wall of the filter box and is located above the opening, the inner wall of the mounting slot is provided with a fixing slot, the top of the collection box is fixedly connected to the mounting bracket, the interior of the mounting bracket is slidably connected to a fixed block extending from the mounting bracket, a second spring is connected between the fixed block and the mounting bracket, the interior of the mounting bracket is located at the bottom end of the fixed block and is slidably connected to a T-shaped bracket, the interior of the mounting bracket is located at the bottom end of the T-shaped bracket and is rotatably connected to a spur gear, one end of the spur gear is fixedly connected to a rotating block, the rotating block is located on the outer wall of the mounting bracket, the reciprocating screw rod is fixedly connected to a first docking seat at one end facing the connecting shaft, the connecting shaft is fixedly connected to a second docking seat at one end facing the reciprocating screw rod, the outer wall of the second docking seat is fixedly connected to a second clamping block, the reciprocating screw rod and the first docking seat are slidably connected to a displacement bracket, a third spring is connected between the displacement bracket and the first docking seat, the displacement bracket extends from the reciprocating screw rod, and the outer wall of the displacement bracket is fixedly connected to a first clamping block extending from the first docking seat.

[0011] As a further solution of the present invention: a limiting hole and a connecting hole are provided on the outer wall of the movable seat, the inner wall of the limiting hole is fitted with the outer wall of the limiting column, and the inner wall of the connecting hole is provided with a ball matching the reciprocating screw.

[0012] As a further solution of the present invention: the outer wall of the slide rod fits with the inner wall of the slide groove, the inner wall of the movable seat fits with the outer wall of the scraper, and the outer wall of the limit block fits with the inner wall of the limit groove.

[0013] As a further solution of the present invention: the inclined surface block is located at the junction of the transverse groove and the inclined groove, and a first inclined surface is provided on one end of the inclined surface block facing the inclined groove.

[0014] As a further solution of the present invention: the outer wall of the mounting frame fits with the inner wall of the mounting groove, the end of the fixing block located outside the mounting frame is provided with a second inclined surface, and the outer wall of one end of the fixing block fits with the inner wall of the fixing groove.

[0015] As a further solution of the present invention: a tooth groove is formed at the bottom end of the T-shaped frame, and the tooth groove is engaged with the spur gear.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The preparation of defatted edible oil of the present invention adopts segmented cooling crystallization, and in combination with supporting equipment, diatomaceous earth is used as a crystal nucleus in the second stage, which increases the crystallization rate and reduces the fat content.

[0017] 2. The preparation of the defatted edible oil of the present invention adopts physical degreasing and refining methods, and no chemical additives are added in the entire production process, thereby retaining the nutritional components and flavor substances of the edible oil as much as possible, and the prepared edible oil is safe and healthy.

[0018] 3. A filtering device is used in step three of the improved process. By setting a filtering mechanism, the oil in the tank is discharged into the filter box through the discharge port. When the oil passes through the filter plate, the filter plate filters the oil. At this time, the driving motor drives the movable seat to move back and forth in the filter box, and the movable seat moves to drive the scraper to move. When the scraper moves toward the opening, the scraper scrapes the surface of the filter plate, and the solid fat on the surface of the filter plate is scraped through the opening into the collection box for collection. When the scraper moves away from the opening, the scraper separates from the filter plate, which is convenient for filtering the solid fat and automatically scrapes and collects the solid fat on the filter plate.

[0019] 4. The filtering device is provided with an installation mechanism. The rotating block rotates to drive the T-shaped frame to move. The displacement of the T-shaped frame pushes the fixed block to move out of the fixed groove, cancels the fixation of the mounting frame, moves the mounting frame out of the mounting groove, and disassembles and cleans the collection box. At this time, the mounting frame is separated from the displacement frame, and the displacement frame is reset by the elastic force of the third spring. The first clamping block is separated from the second clamping block, so that the first docking seat is separated from the second docking seat, which is convenient for rapid installation and disassembly of the collection box. When the collection box is disassembled and cleaned, the connecting shaft and the reciprocating screw are automatically separated to prevent the scraper from scraping the solid grease out of the opening when the collection box is disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the filtering device of the present invention; Figure 2 A cross-sectional view of the tank body of the filtering device of the present invention; Figure 3 A cross-sectional view of a filter box of the filter device of the present invention; Figure 4 This is a schematic diagram of the installation of the scraper of the filtering device of the present invention; Figure 5 This is a schematic structural diagram of the chute of the filtering device of the present invention; Figure 6 This is a schematic diagram of the installation of the inclined surface block of the filtering device of the present invention; Figure 7 This is a schematic diagram of the installation of the collection box of the filtering device of the present invention; Figure 8 This is a schematic diagram of the installation of the fixing block of the filter device of the present invention; Figure 9 This is a schematic diagram of the installation of a T-shaped frame of the filtering device of the present invention; Figure 10 This is a cross-sectional view of the reciprocating screw of the filtering device of the present invention.

[0021] In the figure: 1, tank body; 2, tank cover; 3, stirring motor; 4, stirring shaft; 5, feeding port; 6, filtering mechanism; 601, filter box; 602, filter plate; 603, opening; 604, collecting box; 605, limiting column; 606, reciprocating screw; 607, connecting frame; 608, driving motor; 609, connecting shaft; 610, movable seat; 611, scraper; 612, limiting block; 613, limiting groove; 614, slide rod; 615, slide groove; 616, inclined block; 617, first spring; 6 18. Inclined plate; 7. Mounting mechanism; 701. Mounting slot; 702. Fixing slot; 703. Mounting frame; 704. Fixing block; 705. Second spring; 706. T-shaped frame; 707. Spur gear; 708. Rotating block; 709. First docking seat; 710. Second docking seat; 711. Displacement frame; 712. Third spring; 713. First clamping block; 714. Second clamping block; 8. Jacket; 9. Liquid inlet pipe; 10. Liquid outlet pipe; 11. Discharge port; 12. Valve; 13. Horizontal slot; 14. Inclined slot. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0024] Example 1: A method for preparing defatted edible oil, comprising the following steps: Step 1: Preheat the crude oil. Use the crude oil delivery pump to deliver the degreased crude oil to the heater, heat it to 50°C, and keep the constant temperature for 2 minutes to destroy the original solid grains.

[0025] Step 2: Cooling and crystallizing: The crude oil preheated in Step 1 is pumped into a defatted crystallization tank for crystallization using a two-stage cooling process. The first stage involves cooling from 30°C to 15°C over 24 hours. In the second stage, 300-mesh diatomaceous earth and defatted cooking oil are mixed at a solid-to-liquid ratio of 1:15. This mixture is then added to the crystallization tank as crystallization nuclei, at a ratio of 1% diatomaceous earth to the defatted cooking oil (ideally, the nuclei are added from the bottom or middle of the tank). The mixture is then slowly cooled to 0°C over 8 hours with slow stirring at 10-15 rpm. The mixture is then held at this temperature for 36 hours to form stable crystals.

[0026] Step 3: Filtration and degreasing: The crude edible oil crystallized in step 2 is filtered through a filtration device at a filtration pressure of 0.15-0.35 MPa to achieve solid-liquid separation of solid fat and liquid oil. The separated solid fat is discharged and collected through a discharge port, and the separated liquid oil is the defatted edible oil.

[0027] See also Figures 1 to 10In an embodiment of the present invention, a preparation device for defatted edible oil is provided. The filtering device used in step three includes a tank body 1, a tank cover 2 is installed at the top of the tank body 1, a stirring motor 3 is installed at the top of the tank cover 2, the output end of the stirring motor 3 is connected to the stirring shaft 4, a feed port 5 is provided at the top of the tank cover 2 on one side of the stirring motor 3, a jacket 8 is sleeved on the outer wall of the tank body 1, a liquid inlet pipe 9 and a liquid outlet pipe 10 are fixedly connected to the outer wall of the jacket 8, a discharge port 11 is provided at the bottom end of the tank body 1, a valve 12 is installed on the outer wall of the discharge port 11, and the oil discharged from the discharge port 11 is filtered through a filtering mechanism 6.

[0028] In this embodiment: the preparation of the defatted edible oil of the present invention adopts staged cooling crystallization, and in combination with supporting equipment, diatomaceous earth is used as a crystal nucleus in the second stage, which increases the crystallization rate and reduces the fat content; the preparation of the defatted edible oil of the present invention adopts physical degreasing and refining methods, and no chemical additives are added in the entire production process, thereby retaining the nutritional components and flavor substances of the edible oil as much as possible, and the prepared edible oil is safe and healthy.

[0029] Please refer to Figures 1 to 6 The filtering mechanism 6 includes a filter box 601, which is fixedly connected to the bottom end of the discharge port 11. A filter plate 602 is installed on the inner wall of the filter box 601. An opening 603 is provided on the outer wall of the filter box 601 on one side of the filter plate 602. A collection box 604 is installed on the outer wall of the filter box 601 on one side of the opening 603. A limiting column 605 and a reciprocating screw rod 606 are provided on the inner wall of the filter box 601 above the filter plate 602. The limiting column 605 is fixedly connected to the interior of the filter box 601, and the reciprocating screw rod 606 is rotatably connected to the filter box 601. A connecting frame 607 is fixedly connected to the outer wall of the connecting frame 607. A driving motor 608 is installed on the outer wall of the connecting frame 607. The output end of the driving motor 608 is connected to a connecting shaft 609. The collection box 604 is installed on the filter box through the mounting mechanism 7. The outer wall of 601, the filter mechanism 6 also includes a movable seat 610, the movable seat 610 is slidably connected to the outer wall of the reciprocating screw 606 and the limit column 605, the inner wall of the movable seat 610 is slidably connected with a scraper 611, and the outer walls on both sides of the scraper 611 are fixedly connected to the limit blocks 612. The outer wall of the movable seat 610 is provided with a limit groove 613 for the limit blocks 612 to slide, and the two ends of the scraper 611 are fixedly connected with a slide rod 614. The inner wall of the filter box 601 is provided with a slide groove 615 for the slide rod 614 to slide. The slide groove 615 consists of two transverse grooves 13 and two inclined grooves 14. The interior of the filter box 601 is slidably connected with a slope block 616 extending to the inner cavity of the transverse groove 13. A first spring 617 is connected between the slope block 616 and the filter box 601, and the outer wall of the slope block 616 is fixedly connected with an inclined plate 618.

[0030] In this embodiment, the oil in the tank body 1 is discharged into the filter box 601 through the discharge port 11. When the oil passes through the filter plate 602, the filter plate 602 filters the oil. At this time, the drive motor 608 is started, and the drive motor 608 drives the connecting shaft 609 to rotate. The rotation of the connecting shaft 609 drives the reciprocating screw 606 to rotate. The rotation of the reciprocating screw 606 drives the movable seat 610 to reciprocate in the filter box 601. The displacement of the movable seat 610 drives the scraper 611 to move. At this time, the displacement of the scraper 611 drives the slide bar 614 to slide in the slide groove 615; when the scraper 611 moves toward the opening 603, the slide bar 614 slides along the lower horizontal groove 13. At this time, the bottom end of the scraper 611 contacts the filter plate 602, scraping the filter plate 602. The slide bar 614 moves and contacts the inclined plate 618, pushing the inclined plate 618 to When the scraper 611 moves toward the opening 603, the scraper 611 scrapes the surface of the filter plate 602, and the solid fat on the surface of the filter plate 602 is scraped through the opening 603 into the collection box 604 for collection. When the scraper 611 moves away from the opening 603, the scraper 611 separates from the filter plate 602 to prevent the reverse scraping of the solid fat, which is convenient for the filtering operation of the solid fat and automatically scrapes and collects the solid fat on the filter plate 602.

[0031] Please refer to Figures 7 to 10, the mounting mechanism 7 includes a mounting groove 701, the mounting groove 701 is opened on the outer wall of the filter box 601 and is located above the opening 603, the inner wall of the mounting groove 701 is provided with a fixing groove 702, the top of the collection box 604 is fixedly connected with a mounting bracket 703, the interior of the mounting bracket 703 is slidably connected with a fixing block 704 extending from the mounting bracket 703, a second spring 705 is connected between the fixing block 704 and the mounting bracket 703, the interior of the mounting bracket 703 is located at the bottom end of the fixing block 704 and is slidably connected with a T-shaped bracket 706, the interior of the mounting bracket 703 is located at the bottom end of the T-shaped bracket 706 and is rotatably connected with a spur gear 707, and one end of the spur gear 707 is fixedly connected to a rotating The movable block 708 and the rotating block 708 are located on the outer wall of the mounting frame 703. One end of the reciprocating screw rod 606 facing the connecting shaft 609 is fixedly connected to the first docking seat 709. One end of the connecting shaft 609 facing the reciprocating screw rod 606 is fixedly connected to the second docking seat 710. The outer wall of the second docking seat 710 is fixedly connected to the second clamping block 714. The reciprocating screw rod 606 and the first docking seat 709 are internally slidably connected to the displacement frame 711. A third spring 712 is connected between the displacement frame 711 and the first docking seat 709. The displacement frame 711 extends out of the reciprocating screw rod 606. The outer wall of the displacement frame 711 is fixedly connected to the first clamping block 713 extending out of the first docking seat 709.

[0032] In this embodiment: when installing the collection box 604, the mounting bracket 703 is moved in and out of the mounting groove 701 until the fixing block 704 is engaged into the fixing groove 702 by the elastic force of the second spring 705, and the collection box 604 is fixed. During this process, the mounting bracket 703 contacts the displacement bracket 711, pushing the displacement bracket 711 to move, squeezing the third spring 712, and the displacement bracket 711 moves and drives the first clamping block 713 to move. The first clamping block 713 moves and engages with the second clamping block 714, so that the second docking seat 710 and the first docking seat 709 can rotate synchronously, so that the rotation of the connecting shaft 609 drives the reciprocating screw rod 606 to rotate through the second docking seat 710 and the displacement bracket 711; When the collection box 604 is removed, the rotating block 708 is rotated, and the rotating block 708 rotates to drive the spur gear 707 to rotate, and the spur gear 707 rotates to drive the T-shaped frame 706 to move, and the displacement of the T-shaped frame 706 pushes the fixed block 704 to move, causing the second spring 705 to be squeezed, and the fixed block 704 moves out of the fixed groove 702, canceling the fixation of the mounting frame 703, and moving the mounting frame 703 out of the mounting groove 701, and the collection box 604 is disassembled and cleaned. At this time, the mounting frame 703 and the second spring 705 are disassembled and cleaned. The displacement frame 711 is separated, and the displacement frame 711 is reset by the elastic force of the third spring 712. The reset of the displacement frame 711 drives the first clamping block 713 to separate from the second clamping block 714, so that the first docking seat 709 is separated from the second docking seat 710, which is convenient for quick installation and disassembly of the collection box 604. When the collection box 604 is disassembled for cleaning, the connecting shaft 609 and the reciprocating screw 606 are automatically separated to prevent the scraper 611 from scraping the solid fat out of the opening 603 when the collection box 604 is disassembled.

[0033] Please refer to Figures 3 and 4 The outer wall of the movable seat 610 is provided with a limiting hole and a connecting hole. The inner wall of the limiting hole is in contact with the outer wall of the limiting column 605 . The inner wall of the connecting hole is provided with a ball that matches the reciprocating screw rod 606 .

[0034] In this embodiment, the driving motor 608 drives the connecting shaft 609 to rotate, the rotation of the connecting shaft 609 drives the reciprocating screw 606 to rotate, the rotation of the reciprocating screw 606 drives the movable seat 610 to reciprocate in the filter box 601, and the displacement of the movable seat 610 drives the scraper 611 to move.

[0035] Please refer to Figures 3 to 5 The outer wall of the slide rod 614 fits with the inner wall of the slide groove 615 , the inner wall of the movable seat 610 fits with the outer wall of the scraper 611 , and the outer wall of the limiting block 612 fits with the inner wall of the limiting groove 613 .

[0036] In this embodiment, when the movable seat 610 is displaced to drive the scraper 611 to move, the scraper 611 can slide up and down in the movable seat 610 , and at this time, the limit block 612 slides in the limit groove 613 .

[0037] Please refer to Figures 3 to 6 The inclined surface block 616 is located at the junction of the transverse groove 13 and the inclined groove 14 , and a first inclined surface is provided on one end of the inclined surface block 616 facing the inclined groove 14 .

[0038] In this embodiment: when the scraper 611 moves toward the opening 603, the slide bar 614 slides along the lower transverse groove 13. At this time, the bottom end of the scraper 611 contacts the filter plate 602 and scrapes the filter plate 602. The slide bar 614 moves and contacts the inclined plate 618, pushing the inclined plate 618 to move. The displacement of the inclined plate 618 drives the inclined surface block 616 to move, and displaces the first spring 617 until the slide bar 614 moves to one end of the transverse groove 13, and then moves in the opposite direction. At this time, the inclined surface block 616 is reset by the elastic force of the first spring 617, and the slide bar 614 enters the inclined groove 14 along the slide bar 614, and then enters the upper transverse groove 13 through the inclined groove 14.

[0039] Please refer to Figures 7 to 10 The outer wall of the mounting frame 703 fits in with the inner wall of the mounting groove 701 , and the end of the fixing block 704 located outside the mounting frame 703 is provided with a second inclined surface, and the outer wall of one end of the fixing block 704 fits in with the inner wall of the fixing groove 702 .

[0040] In this embodiment, the mounting bracket 703 is inserted into and out of the mounting groove 701 until the fixing block 704 is engaged into the fixing groove 702 by the elastic force of the second spring 705 , thereby fixing the collection box 604 .

[0041] Please refer to Figures 7 to 10 The bottom end of the T-shaped frame 706 is provided with a tooth groove, which is engaged with the spur gear 707.

[0042] In this embodiment, the rotating block 708 is rotated, and the rotating block 708 drives the spur gear 707 to rotate. The spur gear 707 drives the T-shaped frame 706 to move. The displacement of the T-shaped frame 706 pushes the fixed block 704 to move, squeezing the second spring 705. The fixed block 704 moves out of the fixed groove 702, canceling the fixation of the mounting frame 703.

[0043] Example 2: A method for preparing defatted edible oil, comprising the following steps: Step 1: Preheat the crude oil. Use the crude oil delivery pump to deliver the degreased crude oil to the heater, heat it to 30-50°C, and maintain the constant temperature for 2 minutes to destroy the original solid grains.

[0044] Step 2: Cooling and crystallizing. The crude oil preheated in step 1 is pumped into the defatted crystallization tank and crystallized using a two-stage cooling method. In the first stage of cooling, the oil is cooled from 30°C to 15°C within 18 hours. In the second stage of cooling, 200-mesh diatomaceous earth and defatted edible oil are mixed evenly in a solid-liquid ratio of 1:10 and then added to the crystallization tank as crystallization nuclei in an amount of 0.5% of the mass of the defatted edible oil (it is more appropriate to add the crystallization nuclei from the bottom or middle of the tank). The oil is slowly cooled to 0°C over 14 hours with slow stirring, and then kept warm for 48 hours with slow stirring to form stable crystals.

[0045] Step 3: Filtration and degreasing: The crude edible oil crystallized in step 2 is filtered through a filtration device at a filtration pressure of 0.15-0.35 MPa to achieve solid-liquid separation of solid fat and liquid oil. The separated solid fat is discharged and collected through a discharge port, and the separated liquid oil is the defatted edible oil.

[0046] Preferably, the heat preservation and crystal growing process described in step 2 is carried out by slow stirring, with a stirring speed of 10 to 15 r / min.

[0047] Preferably, the amount of diatomaceous earth added in step 2 is 0.5-1.5% of the mass of the edible oil to be defatted.

[0048] Preferably, the filtration pressure in step three is 0.15-0.35 MPa.

[0049] Its production process and application equipment are the same as those in Example 1 and will not be described in detail here.

[0050] Example 3: A method for preparing defatted edible oil, comprising the following steps: Step 1: Preheat the crude oil. Use the crude oil delivery pump to deliver the crude oil to be degreased to the heater, heat it to 30℃, and keep the constant temperature for 2 minutes to destroy the original solid grains.

[0051] Step 2: Cooling and crystallizing. Pump the crude oil preheated in step 1 into the defatted crystallization tank and use a two-stage cooling and crystallization method. In the first stage of cooling, cool from 30°C to 13°C within 12 hours. In the second stage of cooling, mix 300-mesh diatomaceous earth and defatted edible oil in a solid-liquid ratio of 1:5 and then add them as crystallization nuclei in a ratio of 1.5% of the mass of the defatted edible oil to the crystallization tank (it is more appropriate to add the crystallization nuclei from the bottom or middle of the tank). Use slow stirring to slowly cool to 2°C over 20 hours, slowly stir, and keep warm for 48 hours to form stable crystals.

[0052] Step 3: Filtration and degreasing: The crude edible oil crystallized in step 2 is filtered through a filtration device at a filtration pressure of 0.15-0.35 MPa to achieve solid-liquid separation of solid fat and liquid oil. The separated solid fat is discharged and collected through a discharge port, and the separated liquid oil is the defatted edible oil.

[0053] Its production process and application equipment are the same as those in Example 1 and will not be described in detail here.

[0054] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. Defatted edible oil, characterized in that The production process includes the following steps: Step 1: Preheat the crude oil. Use the crude oil delivery pump to deliver the degreased crude oil to the heater, heat it to 30-50°C, and keep the constant temperature for 1-2 minutes to destroy the original solid grains. Step 2: Cooling crystallization, the crude oil preheated in step 1 is pumped into a defatted crystallization tank and crystallized using a two-stage cooling method; the first cooling stage is cooling from 30°C to 13-15°C within 12-24 hours; the second cooling stage is mixing 200-300 mesh diatomaceous earth and defatted edible oil in a solid-liquid ratio of 1:5-15, and then adding them as crystallization nuclei to the crystallization tank according to the proportion, using slow stirring to slowly cool to 0-2°C over 8-20 hours, slowly stirring, and keeping the temperature for 36-48 hours to form stable crystals; Step three: filtering and defatting, filtering the crude edible oil after crystallization in the above step two through a filtering device to achieve solid-liquid separation of solid fat and liquid oil, and the separated solid fat is discharged and collected through the discharge port, and the separated liquid oil is the defatted edible oil.

2. The production process of defatted edible oil according to claim 1, characterized in that: The heat preservation and crystal growth process described in step 2 adopts slow stirring with a stirring speed of 10 to 15 r / min; the amount of diatomaceous earth added is 0.5 to 1.5% of the mass of the edible oil to be defatted; the filtration pressure described in step 3 is 0.15 to 0.35 MPa.

3. The equipment used in the production process of defatted edible oil according to claim 2, characterized in that: The filtering device used in step 3 comprises a tank body (1), a tank cover (2) is installed on the top of the tank body (1), a stirring motor (3) is installed on the top of the tank cover (2), the output end of the stirring motor (3) is connected to the stirring shaft (4), the top of the tank cover (2) is provided with a feed port (5) on one side of the stirring motor (3), the outer wall of the tank body (1) is sleeved with a jacket (8), the outer wall of the jacket (8) is fixedly connected with a liquid inlet pipe (9) and a liquid outlet pipe (10), the bottom end of the tank body (1) is provided with a discharge port (11), the outer wall of the discharge port (11) is provided with a valve (12), and the oil discharged from the discharge port (11) is filtered through a filtering mechanism (6); The filtering mechanism (6) comprises a filter box (601), the filter box (601) being fixedly connected to the bottom end of the discharge port (11), a filter plate (602) being installed on the inner wall of the filter box (601), an opening (603) being provided on the outer wall of the filter box (601) on one side of the filter plate (602), a collecting box (604) being installed on the outer wall of the filter box (601) on one side of the opening (603), and a limiting column (604) being provided on the inner wall of the filter box (601) above the filter plate (602). 605) and a reciprocating screw rod (606), the limiting column (605) is fixedly connected to the interior of the filter box (601), the reciprocating screw rod (606) is rotatably connected to the filter box (601), the outer wall of the filter box (601) is fixedly connected to a connecting frame (607), the outer wall of the connecting frame (607) is installed with a driving motor (608), the output end of the driving motor (608) is connected to a connecting shaft (609), and the collecting box (604) is installed on the outer wall of the filter box (601) through a mounting mechanism (7).

4. The preparation equipment of defatted edible oil according to claim 3, characterized in that: The filtering mechanism (6) further comprises a movable seat (610), the movable seat (610) being slidably connected to the reciprocating screw (606) and the outer wall of the limiting column (605), the inner wall of the movable seat (610) being slidably connected to a scraper (611), the outer walls on both sides of the scraper (611) being fixedly connected to limiting blocks (612), the outer wall of the movable seat (610) being provided with limiting grooves (613) for the limiting blocks (612) to slide, and the two ends of the scraper (611) being fixedly connected to sliding rods ( 614), the inner wall of the filter box (601) is provided with a slide groove (615) for the slide rod (614) to slide, the slide groove (615) is composed of two transverse grooves (13) and two inclined grooves (14), the interior of the filter box (601) is slidably connected to a slope block (616) extending to the inner cavity of the transverse groove (13), a first spring (617) is connected between the slope block (616) and the filter box (601), and the outer wall of the slope block (616) is fixedly connected to a slope plate (618).

5. The preparation equipment of defatted edible oil according to claim 4, characterized in that: The mounting mechanism (7) includes a mounting groove (701), the mounting groove (701) is provided on the outer wall of the filter box (601) and is located above the opening (603), the inner wall of the mounting groove (701) is provided with a fixing groove (702), the top of the collection box (604) is fixedly connected to a mounting frame (703), the interior of the mounting frame (703) is slidably connected to a fixing block (704) extending from the mounting frame (703), a second spring (705) is connected between the fixing block (704) and the mounting frame (703), the interior of the mounting frame (703) is slidably connected to a T-shaped frame (706) at the bottom end of the fixing block (704), the interior of the mounting frame (703) is rotatably connected to a spur gear (707) at the bottom end of the T-shaped frame (706), one end of the spur gear (707) is fixedly connected to a rotating shaft (708), and the rotating shaft (709) is fixedly connected to the rotating shaft (709). A movable block (708) is provided, wherein the rotating block (708) is located on the outer wall of the mounting frame (703); one end of the reciprocating screw (606) facing the connecting shaft (609) is fixedly connected to a first docking seat (709); one end of the connecting shaft (609) facing the reciprocating screw (606) is fixedly connected to a second docking seat (710); the outer wall of the second docking seat (710) is fixedly connected to a second clamping block (714); the reciprocating screw (606) and the first docking seat (709) are internally slidably connected to a displacement frame (711); a third spring (712) is connected between the displacement frame (711) and the first docking seat (709); the displacement frame (711) extends out of the reciprocating screw (606); and the outer wall of the displacement frame (711) is fixedly connected to a first clamping block (713) extending out of the first docking seat (709).

6. The preparation equipment of defatted edible oil according to claim 4, characterized in that: The outer wall of the movable seat (610) is provided with a limiting hole and a connecting hole, the inner wall of the limiting hole is in contact with the outer wall of the limiting column (605), and the inner wall of the connecting hole is provided with a ball that matches the reciprocating screw rod (606).

7. The preparation equipment for defatted edible oil according to claim 4, characterized in that: The outer wall of the slide rod (614) fits with the inner wall of the slide groove (615), the inner wall of the movable seat (610) fits with the outer wall of the scraper (611), and the outer wall of the limiting block (612) fits with the inner wall of the limiting groove (613).

8. The preparation equipment for defatted edible oil according to claim 4, characterized in that: The inclined surface block (616) is located at a position where the transverse groove (13) and the inclined groove (14) meet, and a first inclined surface is provided at one end of the inclined surface block (616) facing the inclined groove (14).

9. The equipment for preparing defatted edible oil according to claim 5, characterized in that: The outer wall of the mounting frame (703) is in contact with the inner wall of the mounting groove (701); one end of the fixing block (704) located outside the mounting frame (703) is provided with a second inclined surface; and the outer wall of one end of the fixing block (704) is in contact with the inner wall of the fixing groove (702).

10. The equipment for preparing defatted edible oil according to claim 5, characterized in that: A tooth groove is provided at the bottom end of the T-shaped frame (706), and the tooth groove is engaged with the spur gear (707).

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