Egg oil as well as preparation method and processing device thereof

Abstract

The invention provides egg yolk oil as well as a preparation method and a processing device thereof. The invention aims to solve the technical problem that egg yolk oil prepared by the prior art contains benzo (a) pyrene and microorganisms. According to the technical scheme, the preparation method of the egg yolk oil comprises the following steps: crushing cooked egg yolk and drying to obtain egg yolk powder; frying the egg yolk powder until all egg yolk oil comes out to obtain a residue-liquid mixture; separating the residue-liquid mixture to obtain filtrate; enabling the filtrate to pass through a purifying agent to remove benzo (a) pyrene in the filtrate so as to obtain primary oil; sub-packaging, sealing and sterilizing the primary oil to obtain finished egg yolk oil; wherein the purifying agent comprises activated clay and a complex microbial inoculant; the speed of the filtrate passing through the purifying agent is less than or equal to 2cm / min; the thickness of the purifying agent in the flowing direction of the filtrate is larger than or equal to 100 cm. The egg yolk oil prepared by the preparation method does not contain benzo (a) pyrene and microorganisms. In addition, the invention further provides a processing device of the egg yolk oil.

Description

Technical Field

[0001] The present invention relates to the technical field of egg yolk oil, and specifically relates to egg yolk oil, a preparation method thereof, and a processing device therefor. Background Art

[0002] Egg yolk oil is the oil extracted from the egg yolks of eggs, also known as chicken fish oil, phoenix oil, etc. Egg yolk oil contains rich vitamins A, D, and lecithin, and these substances play an important role in the regeneration and metabolism of the skin. According to clinical literature reports, the clinical applications of egg yolk oil in diseases such as scalds, otitis media, eczema, neurodermatitis, non-healing ulcers for a long time, sores, hemorrhoids, tinea, cracked hands and feet, trauma, various insect sores and poisons, hyperlipidemia, diarrhea, neonatal sclerema, cracked nipples, hemorrhoids, cervical erosion, etc. have all achieved good curative effects.

[0003] The mainstream processing method of egg yolk oil is the dry distillation method, which obtains egg yolk oil by frying egg yolks. However, benzo(a)pyrene is produced during the frying process of egg yolks, and this is a compound with strong carcinogenicity. In addition, the usage method of egg yolk oil is to apply it to the wound, and the primary task of wound care is to prevent infection. Therefore, when preparing egg yolk oil, how to better remove benzo(a)pyrene and kill microorganisms is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation method of egg yolk oil, which can better remove benzo(a)pyrene in egg yolk oil and kill microorganisms; based on the same inventive concept, the present invention also provides egg yolk oil prepared by the foregoing preparation method, and a processing device for preparing egg yolk oil.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A preparation method of egg yolk oil, comprising the following steps: S1: Crushing cooked egg yolks and drying them to obtain egg yolk powder; S2: Frying the egg yolk powder until all the egg yolk oil is extracted to obtain a residue-liquid mixture; S3: Separating the residue-liquid mixture to obtain filter residue and filtrate; passing the filtrate through a purification agent to remove benzo(a)pyrene in the filtrate to obtain a preliminary oil; S4: Sub-packaging, sealing, and sterilizing the preliminary oil to obtain finished egg yolk oil; Wherein, in step S3, the purification agent includes: activated clay and a compound bactericide; the speed at which the filtrate passes through the purification agent is less than or equal to 2 cm / min; the thickness of the purification agent in the flowing direction of the filtrate is greater than or equal to 100 cm. In addition, in step S1, the cooked egg yolks are obtained by steaming or boiling fresh eggs and then peeling off the eggshells and egg whites; the fresh eggs can be cooked thoroughly after boiling in boiling water for 10 minutes or steaming for 15 minutes.

[0006] Optionally, in step S3, the mass ratio of the activated clay to the compound microbial agent is 100:1; the compound microbial agent, by mass, includes: 1 part of Lactobacillus rhamnosus with the preservation number of ACCC 05450, 1 part of Lactobacillus with the preservation number of ACCC03877, 1 part of Actinoplanes missouriensis with the preservation number of CICC 11008, and 1 part of Streptomyces olivaceus with the preservation number of CICC 23628. Generally, the bacteria content of the compound microbial agent is greater than or equal to 10^5 cfu / g. In addition, the purifying agent is prepared as follows: after mixing the activated clay and the compound microbial agent, soak them in egg yolk oil for 24 h to obtain the purifying agent. For the purifying agent put into use, there is no need to replace the whole batch of new purifying agent subsequently. Only maintain it every 10 days, and the maintenance method is as follows: along the filtrate flow direction, take away 10 cm thick of the purifying agent from the upstream and supplement 10 cm thick of the activated clay at the downstream.

[0007] Optionally, in step S1, crush the cooked egg yolk and spread it into a layer 3 cm thick, and dry it with circulating hot air at 120 °C, turning it over every 30 min during the drying process, and the drying time is 3 h; In step S2, the frying temperature of the egg yolk powder is 200 °C; In step S4, after the crude oil is filled and sealed, the following steps are used for sterilization: S41: Heat it in a water bath to 100 °C and keep it for 30 min; S42: Place it at room temperature of 30 °C for 24 h; S43: Repeat steps S41 and S42 cyclically; after step S41 is executed 3 times, the finished egg yolk oil can be obtained.

[0008] In addition, the activated clay used for preparing or maintaining the purifying agent can also be filled and sealed in a container and sterilized by the above steps. In step S3, a second filter cloth with 200 meshes is usually used to separate the residue-liquid mixture.

[0009] This application also provides an egg yolk oil prepared by the foregoing preparation method.

[0010] This application also provides a processing device for egg yolk oil, which is used to process the foregoing egg yolk oil; the processing device includes: a liquid storage tank, a pumping and discharging tank, and a purification tank; the lower part of the liquid storage tank is communicated with the lower part of the pumping and discharging tank, and a first valve is provided; the lower part of the pumping and discharging tank is communicated with the lower part of the purification tank, and a second valve is provided; a liquid discharge port is provided at the upper part of the purification tank; a piston is provided in the pumping and discharging tank, and a first power source is adapted to drive the piston to move up and down; a filter cartridge extending in the up-down direction is provided in the purification tank to accommodate the purifying agent; an open mouth is provided at the top of the purification tank for taking and placing the filter cartridge; a detachable cover plate is provided at the open mouth.

[0011] Optionally, the filter cartridge includes: a plurality of filter dishes sequentially connected in the vertical direction; the upper section of the filter dish is provided with internal threads, and the lower section is provided with external threads, and the adjacent upper and lower filter dishes are threadedly connected; the topmost filter dish is equipped with a dish cover, and the dish cover is provided with internal threads adapted to the filter dish; the dish cover is provided with a plurality of filter holes penetrating up and down, and is provided with a handle; the bottom plate of the filter dish is provided with a plurality of filter holes penetrating up and down, and is covered with a first filter cloth; the outer peripheral wall of the filter dish is provided with an elastic sealing layer; a bracket is provided at the bottom inside the purification tank to form a liquid inlet area below the filter cartridge; the pumping and discharging tank is communicated with the liquid inlet area; a gap is left between the top of the filter cartridge and the cover plate to form a liquid outlet area above the filter cartridge; the liquid discharge port is arranged in the liquid outlet area.

[0012] Optionally, the top plate of the liquid storage tank is provided with a liquid inlet and is equipped with a separation mechanism; the separation mechanism includes: a frame arranged at the liquid inlet, a sieve plate arranged inside the frame, and a second filter cloth laid on the sieve plate; the top plate is provided with a mounting groove surrounding the liquid inlet, and the bottom of the mounting groove supports the frame and the sieve plate; the edge of the second filter cloth is pressed between the bottom of the mounting groove and the frame; an extrusion member is arranged above the sieve plate, and a second power source adapted to drive the extrusion member to move up and down is provided.

[0013] Optionally, the upper surfaces of the frame and the top plate are flush with the upper surface of the main body part of the second filter cloth; the top plate is respectively provided with baffles extending in the left-right direction on the front and rear sides of the liquid inlet; a slag pushing plate extending in the front-rear direction is arranged between the two baffles; the left and right sides of the slag pushing plate are respectively limited by a first roller, and the axle of the first roller is oriented in the front-rear direction; the first roller is installed on a wheel frame, and the wheel frame is adapted to be driven by a third power source to move left and right; the baffle is provided with a mounting opening penetrating through the front and rear, and a pressing block is arranged in the mounting opening; the outer end of the pressing block is provided with a guide rod, and the top plate is provided with a guide block having a guide hole; the guide rod passes through the guide hole, and a limit nut is installed on the protruding part; a first compression spring is sleeved on the guide rod to drive the pressing block to extend out of the mounting opening and limit the upper surface of the frame; the inner end face of the pressing block is a convex arc surface to retract into the mounting opening when the slag pushing plate passes by and applies a force.

[0014] Optionally, the left and right ends of the baffle extend beyond the edge of the top plate to form extending sections; multiple wheel grooves are evenly arranged on the inner side of the baffle in the vertical direction, and the wheel grooves extend in the left-right direction to the extending sections; left vertical grooves and right vertical grooves are respectively arranged at the extending sections at the left and right ends of the baffle to communicate with the left ends and right ends of the respective wheel grooves; the left vertical groove extends to the bottom end of the baffle and is provided with a lifting mechanism; multiple second rollers are respectively arranged at the front and rear ends of the slag pushing plate in the vertical direction, and the wheel grooves limit the second rollers; the number of the wheel grooves arranged on the baffle is greater than the number of the second rollers arranged at one end of the slag pushing plate; when the slag pushing plate moves to the left vertical groove, the lifting mechanism drives the slag pushing plate to move upward so that the second rollers respectively rise to the wheel grooves at the upper level; when the slag pushing plate moves to the right vertical groove, it slides downward, and the second rollers respectively descend to the wheel grooves at the lower level.

[0015] Optionally, the lifting mechanism includes: a sealing member installed at the bottom end of the left vertical groove, a second compression spring installed on the top of the sealing member, and a lifting block installed on the top of the second compression spring; the lifting block has a slope surface extending from the right side surface to the upper left and then to the upper surface; when the lifting block moves upward to the limit, the slope surface extends from the bottom of the lowermost wheel groove to the bottom of the wheel groove at the upper level; a limiting rod extending downward is provided at the bottom of the lifting block, and the sealing member is provided with a limiting hole cooperating with the limiting rod; the second compression spring is sleeved on the limiting rod.

[0016] The beneficial effects of the present invention are mainly reflected in: A purifying agent is made from activated clay and a specific composite bactericide, and the filtrate is passed through the purifying agent, which can effectively remove benzo[a]pyrene in the filtrate; moreover, the purifying agent has a long service life, does not need to be replaced frequently, has a low maintenance frequency, is more convenient to operate, and has a lower cost.

[0017] 2. The intermittent sterilization method is adopted for sterilization, which can not only fully kill the microorganisms in the egg yolk oil, but also retain the effective components in the egg yolk oil as much as possible. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a structural schematic diagram of the processing device for egg yolk oil; Figure 2 It is an assembly schematic diagram of the pumping and discharging tank and the piston; Figure 3 It is an assembly schematic diagram of the purification tank and the filter cartridge; Figure 4 Structural schematic diagram of filter dish and dish cover Figure 5 Assembly schematic diagram of frame and top plate Figure 6 Installation schematic diagram of slag pushing plate Figure 7 Assembly schematic diagram of third power source and slag pushing plate Figure 8 Assembly schematic diagram of baffle and pressing block Figure 9 Schematic diagram of baffle provided with wheel groove Figure 10 For Figure 9 Bottom view Figure 11 Structural schematic diagram of lifting block

[0020] Reference numerals: 1, liquid storage tank; 2, pumping and discharging tank; 3, purification tank; 4, first valve; 5, second valve; 6, liquid discharge port; 7, piston; 8, first power source; 9, filter cartridge; 10, cover plate; 11, filter dish; 12, dish cover; 13, handle; 14, bracket; 15, liquid inlet; 16, frame; 17, sieve plate; 18, second filter cloth; 19, installation groove; 20, extrusion member; 21, second power source; 22, top plate; 23, baffle; 24, slag pushing plate; 25, first roller; 26, wheel frame; 27, third power source; 28, installation port; 29, pressing block; 30, guide rod; 31, guide block; 32, limit nut; 33, first compression spring; 34, wheel groove; 35, left vertical groove; 36, right vertical groove; 37, second roller; 38, sealing member; 39, second compression spring; 40, lifting block; 41, inclined plane; 42, limit rod; 43, limit groove; 44, restricted part; 45, third valve Detailed implementation manners

[0021] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature rather than restrictive

[0022] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention

[0023] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0024] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship 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.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Embodiment 1 As Figures 1 - 3 shown, the embodiment of the present invention provides a processing device for egg yolk oil. The processing device includes: a liquid storage tank 1, a pumping and discharging tank 2, and a purification tank 3. The lower part of the liquid storage tank 1 is communicated with the lower part of the pumping and discharging tank 2, and a first valve 4 is provided. The lower part of the pumping and discharging tank 2 is communicated with the lower part of the purification tank 3, and a second valve 5 is provided. A liquid discharge port 6 is provided at the upper part of the purification tank 3. A piston 7 is provided in the pumping and discharging tank 2, and a first power source 8 is adapted to drive the piston 7 to move up and down. A filter cartridge 9 extending in the vertical direction is provided in the purification tank 3 to accommodate a purifying agent. An open mouth is provided at the top of the purification tank 3 for taking and placing the filter cartridge 9; a detachable cover plate 10 is provided at the open mouth.

[0028] It should be understood that the processing device can be used to remove benzo(a)pyrene from the filtrate. The liquid storage tank 1 is used to store the filtrate. Open the first valve 4 and close the second valve 5, and let the first power source 8 drive the piston 7 to move upward, then the filtrate in the liquid storage tank 1 can be suctioned into the pumping tank 2. Close the first valve 4, open the second valve 5, and let the first power source 8 drive the piston 7 to move downward slowly, then the filtrate in the pumping tank 2 can be slowly driven into the bottom of the purification tank 3; the filtrate flowing into the bottom of the purification tank 3 will flow slowly from bottom to top and be discharged from the liquid discharge port 6 at the upper part of the purification tank 3; a filter cartridge 9 is provided in the purification tank 3, and the filter cartridge 9 is filled with a purification agent. When the filtrate slowly passes through the filter cartridge 9, the benzo(a)pyrene in the filtrate can be removed. The first power source 8 is usually set as a linear motor, so that the moving speed of the piston 7 can be controlled more precisely, thereby precisely controlling the flow rate of the filtrate in the filter cartridge 9. The first power source 8 can drive the piston 7 to move up and down by driving the piston rod of the piston 7 to move up and down. In addition, a third valve 45 can be provided at the liquid discharge port 6.

[0029] Embodiment 2

[0030] As Figure 3 、 Figure 4 shown, on the basis of Embodiment 1, the filter cartridge 9 includes: a plurality of filter dishes 11 connected in sequence in the up and down direction; the upper section of the filter dish 11 is provided with internal threads and the lower section is provided with external threads, and the adjacent filter dishes 11 up and down are threadedly connected; the uppermost filter dish 11 is installed with a dish cover 12, and the dish cover 12 is provided with internal threads adapted to the filter dish 11; the dish cover 12 is provided with a plurality of filter holes penetrating up and down, and is provided with a handle 13; the bottom plate of the filter dish 11 is provided with a plurality of filter holes penetrating up and down and is laid with a first filter cloth; an elastic sealing layer is provided on the outer peripheral wall of the filter dish 11; a support 14 is provided at the bottom in the purification tank 3 to form a liquid inlet area below the filter cartridge 9; the pumping tank 2 communicates with the liquid inlet area; a gap is left between the top of the filter cartridge 9 and the cover plate 10 to form a liquid outlet area above the filter cartridge 9; the liquid discharge port 6 is arranged in the liquid outlet area.

[0031] It should be understood that take out the filter cartridge 9 from the purification tank 3, remove the filter dish 11 at the lower end of the filter cartridge 9 and pour out the purification agent; remove the dish cover 12, install the filter dish 11 filled with activated clay at the upper end of the filter cartridge 9; finally reinstall the dish cover 12 and put the filter cartridge 9 into the purification tank 3, then the maintenance of the purification agent can be completed, and the operation is simple and convenient. The removed filter dish 11 usually needs to be sterilized and a new first filter cloth needs to be replaced. The elastic sealing layer can be made of food-grade silicone rubber, which can prevent the filtrate from passing through the gap between the outer wall of the filter cartridge 9 and the inner wall of the purification tank 3, so as to ensure a sufficient purification effect on the filtrate and fully remove the benzo(a)pyrene in the filtrate.

[0032] Embodiment 3

[0033] As shown in Figure 1 , Figure 5 , Figure 6 , on the basis of Embodiment 1 or Embodiment 2, the top plate 22 of the liquid storage tank 1 is provided with a liquid inlet 15, and a separation mechanism is installed; the separation mechanism includes: a frame 16 arranged at the liquid inlet 15, a sieve plate 17 arranged in the frame 16, and a second filter cloth 18 laid on the sieve plate 17; the top plate 22 is provided with an installation groove 19 surrounding the liquid inlet 15, and the bottom of the installation groove 19 supports the frame 16 and the sieve plate 17; the edge of the second filter cloth 18 is pressed between the bottom of the installation groove 19 and the frame 16; an extrusion member 20 is arranged above the sieve plate 17, and a second power source 21 adapted to drive the extrusion member 20 to move up and down is provided.

[0034] It should be understood that this processing device can also be used to separate the slag-liquid mixture. The slag-liquid mixture can be slowly poured into the liquid inlet 15 manually or by a conveying device. The filtrate will flow into the liquid storage tank 1 through the second filter cloth 18 and the sieve plate 17, while the filter residue will be retained on the upper surface of the second filter cloth 18. Stop pouring the slag-liquid mixture, and let the second power source 21 drive the extrusion member 20 to move downward, so as to cooperate with the sieve plate 17 to extrude the filter residue, thereby squeezing out the filtrate adsorbed by the filter residue. Generally, setting the second power source 21 as a cylinder can meet the requirements; of course, according to the actual situation, the second power source 21 can also be replaced with a hydraulic cylinder or other driving devices.

[0035] Embodiment 4

[0036] As shown in Figures 6 - 8 , on the basis of Embodiment 3, the upper surfaces of the frame 16 and the top plate 22 are flush with the upper surface of the main part of the second filter cloth 18; the top plate 22 is provided with baffles 23 extending in the left-right direction on the front and rear sides of the liquid inlet 15 respectively; a slag pushing plate 24 extending in the front-rear direction is arranged between the two baffles 23; the left and right sides of the slag pushing plate 24 are respectively limited by first rollers 25, and the axle of the first roller 25 is oriented in the front-rear direction; the first roller 25 is installed on a wheel frame 26, and the wheel frame 26 is adapted to be driven by a third power source 27 to move left and right; the baffle 23 is provided with an installation opening 28 penetrating through the front and rear, and a pressing block 29 is arranged in the installation opening 28; a guide rod 30 is arranged at the outer end of the pressing block 29, and the top plate 22 is provided with a guide block 31 having a guide hole; the guide rod 30 passes through the guide hole, and a limit nut 32 is installed on the protruding part; the guide rod 30 is sleeved with a first compression spring 33 to drive the pressing block 29 to protrude from the installation opening 28 and limit the upper surface of the frame 16; the inner end surface of the pressing block 29 is a convex arc surface so as to retract into the installation opening 28 when the slag pushing plate 24 passes by and applies a force.

[0037] It should be understood that by driving the wheel frame 26 to move leftward by the third power source 27, the slag pushing plate 24 can be driven to move leftward, so as to drive away the filter residue remaining on the upper surface of the second filter cloth 18; by driving the wheel frame 26 to move rightward by the third power source 27, the slag pushing plate 24 can be driven to reset rightward. The third power source 27 can be set as a cylinder or a linear motor. The main part of the second filter cloth 18 refers to the part located on the upper surface of the sieve plate 17; the pressing block 29 presses the frame 16, which can ensure that the frame 16 tightly presses the edge of the second filter cloth 18. The pressing block 29 provided on the front baffle 23 has its rear end face as the inner end face; the pressing block 29 provided on the rear baffle 23 has its front end face as the inner end face. Since the inner end face of the pressing block 29 is a convex arc surface; the thrust applied to the pressing block 29 when the slag pushing plate 24 passes by will drive the pressing block 29 to move outward to retract into the mounting opening 28 and avoid the slag pushing plate 24; in addition, a third roller walking along the inner wall of the mounting opening 28 can be installed on the mounting edge of the pressing block 29, and the axle of the third roller is oriented up and down, so as to reduce the friction generated when the pressing block 29 moves back and forth. Additionally, an electromagnet can be arranged on the outer side of the pressing block 29, and when the slag pushing plate 24 passes by, the pressing block 29 is magnetically attracted by the electromagnet to avoid the slag pushing plate 24. Multiple first rollers 25 can be installed on both the left and right sides of the slag pushing plate 24 along the up and down direction respectively on the wheel frame 26.

[0038] Embodiment 5

[0039] As Figures 6 - 9 shown, on the basis of Embodiment 4, the left and right ends of the baffle 23 extend beyond the edge of the top plate 22 to form extending segments; multiple wheel grooves 34 are uniformly arranged on the inner side surface of the baffle 23 along the up and down direction, and the wheel grooves 34 extend to the extending segments along the left and right direction; left vertical grooves 35 and right vertical grooves 36 are respectively arranged at the extending segments at the left and right ends of the baffle 23 to respectively communicate with the left end and the right end of each wheel groove 34; the left vertical groove 35 extends to the bottom end of the baffle 23 and is provided with a rising mechanism; multiple second rollers 37 are respectively arranged at the front and rear ends of the slag pushing plate 24 along the up and down direction, and the wheel grooves 34 limit the second rollers 37; the number of the wheel grooves 34 arranged on the baffle 23 is greater than the number of the second rollers 37 arranged at one end of the slag pushing plate 24; when the slag pushing plate 24 moves to the left vertical groove 35, the rising mechanism drives the slag pushing plate 24 to move upward, so that each second roller 37 respectively rises to the upper-level wheel groove 34; when the slag pushing plate 24 moves to the right vertical groove 36, it slides down, and each second roller 37 respectively descends to the lower-level wheel groove 34.

[0040] It should be understood that the inner side of the baffle 23 refers to the side facing another baffle 23. In Embodiment 4, the present invention limits the left and right sides of the slag pushing plate 24 by rollers installed on the wheel frame 26, and the third power source 27 drives the wheel frame 26 to move left and right to drive the slag pushing plate 24 to move left and right; in this way, the height of the slag pushing plate 24 can be adjusted flexibly. On this basis, when the slag pushing plate 24 moves to the right vertical groove 36, it will slide down to the upper surface of the top plate 22 due to its own gravity; in this way, when the slag pushing plate 24 moves to the left, it will drive away the filter residue remaining on the upper surface of the second filter cloth 18. When the slag pushing plate 24 moves to the left vertical groove 35, the lifting mechanism will drive the slag pushing plate 24 to move upward, and each second roller 37 will rise to the wheel groove 34 at the upper level; in this way, when the slag pushing plate 24 moves to the right, the bottom end thereof will be separated from the upper surface of the top plate 22, thereby avoiding pushing the filter residue or filtrate remaining on the upper surface of the second filter cloth 18 to the right and causing pollution, and reducing the wear of the second filter cloth 18 and lowering the replacement frequency of the second filter cloth 18. In this way, the filter residue can be stably discharged from the left side.

[0041] Embodiment 6

[0042] As Figures 6 - 11 shown, on the basis of Embodiment 5, the lifting mechanism includes: a sealing member 38 installed at the bottom end of the left vertical groove 35, a second compression spring 39 installed at the top of the sealing member 38, and a lifting block 40 installed at the top of the second compression spring 39; the lifting block 40 has a slope surface 41 extending from the right side surface to the upper left and extending to the upper surface; when the lifting block 40 moves upward to the limit, the slope surface 41 extends from the bottom of the lowest wheel groove 34 to the bottom of the wheel groove 34 at the upper level; a limiting rod 42 extending downward is provided at the bottom of the lifting block 40, and the sealing member 38 is provided with a limiting hole cooperating with the limiting rod 42; the second compression spring 39 is sleeved on the limiting rod 42.

[0043] It should be understood that when the lifting block 40 moves upward to the limit, the lower end of the slope surface 41 is lower than or flush with the bottom of the lowermost wheel groove 34, and the upper surface of the lifting block 40 is flush with the bottom of the upper-level wheel groove 34. When the slag pushing plate 24 moves to the left, the lowermost second roller 37 will move along the lowermost wheel groove 34; when the second roller 37 moves to the slope surface 41 of the lifting block 40, it will force the lifting block 40 to move downward; when the second roller 37 moves along the slope surface 41 of the lifting block 40 to the upper surface of the lifting block 40, the second compression spring 39 will drive the lifting block 40 to reset upward, thereby driving the second roller 37 to move upward, and further moving the slag pushing plate 24 and the remaining second rollers 37 upward; in this way, each second roller 37 can be raised to the upper-level wheel groove 34. In addition, a limiting groove 43 extending in the vertical direction can be provided on the groove wall of the left vertical groove 35, and a corresponding restricted portion 44 can be provided on the lifting block 40 to improve the stability of the lifting block 40.

[0044] Table 1. Configuration ratios of each compound bacterium agent Lactobacillus rhamnosus Lactobacillus Actinoplanes missouriensis Streptomyces olivaceus Bacterial agent Ⅰ 1 part 1 part 1 part 1 part Bacterial agent Ⅱ 2 parts 2 parts 0 part 0 part Bacterial agent Ⅲ 0 part 0 part 2 parts 2 parts Note: In Table 1, the strain preservation number of Lactobacillus rhamnosus is ACCC 05450; the strain preservation number of Lactobacillus is ACCC 03877; the strain preservation number of Actinoplanes missouriensis is CICC 11008; the strain preservation number of Streptomyces olivaceus is CICC 23628. And the bacteria content of each compound bacterium agent is greater than or equal to 10^5 cfu / g.

[0045] Example 7

[0046] S1: Crush the cooked egg yolk and dry it to obtain egg yolk powder.

[0047] S2: Fry the egg yolk powder until all the egg yolk oil is out to obtain a residue-liquid mixture.

[0048] S3: Separate the residue-liquid mixture to obtain filter residue and filtrate; mix activated clay and compound bacterium agent I at a mass ratio of 100:1, then soak it in egg yolk oil for 24 h to obtain a purification agent; arrange a 100 cm thick purification agent along the flow direction of the filtrate, and let the filtrate pass through the purification agent at a speed of 2 cm / min to obtain crude oil.

[0049] S4: Package and seal the crude oil; then sterilize it according to the following steps: S41: Heat it in a water bath to 100 °C and keep it for 30 min; S42: Place it at room temperature of 30 °C for 24 h; S43: Repeat steps S41 and S42 cyclically; after step S41 is executed 3 times, the finished egg yolk oil can be obtained.

[0050] In addition, the purifying agent is maintained every 10 days hereafter, and the maintenance method is as follows: Along the filtrate flow direction, 10 cm thick purifying agent is taken away from the upstream, and 10 cm thick activated clay is supplemented at the downstream.

[0051] Comparative Example 1

[0052] S1: Crush the cooked egg yolk and dry it to obtain egg yolk powder.

[0053] S2: Fry the egg yolk powder until all the egg yolk oil is extracted to obtain a residue-liquid mixture.

[0054] S3: Separate the residue-liquid mixture to obtain residue and filtrate; Mix the activated clay and compound bacterium agent II according to a mass ratio of 100:1, then soak them in the egg yolk oil for 24 h to obtain a purifying agent; Arrange 100 cm thick purifying agent along the filtrate flow direction, and let the filtrate pass through the purifying agent at a speed of 2 cm / min to obtain the preliminary oil.

[0055] S4: Package and seal the preliminary oil; Then sterilize it according to the following steps: S41: Heat it in a water bath to 100 °C and keep it for 30 min; S42: Place it at room temperature of 30 °C for 24 h; S43: Repeat steps S41 and S42 cyclically; After step S41 is executed 3 times, the finished egg yolk oil can be obtained.

[0056] Comparative Example 2

[0057] S1: Crush the cooked egg yolk and dry it to obtain egg yolk powder.

[0058] S2: Fry the egg yolk powder until all the egg yolk oil is extracted to obtain a residue-liquid mixture.

[0059] S3: Separate the residue-liquid mixture to obtain residue and filtrate; Mix the activated clay and compound bacterium agent III according to a mass ratio of 100:1, then soak them in the egg yolk oil for 24 h to obtain a purifying agent; Arrange 100 cm thick purifying agent along the filtrate flow direction, and let the filtrate pass through the purifying agent at a speed of 2 cm / min to obtain the preliminary oil.

[0060] S4: Package and seal the preliminary oil; Then sterilize it according to the following steps: S41: Heat it in a water bath to 100 °C and keep it for 30 min; S42: Place it at room temperature of 30 °C for 24 h; S43: Repeat steps S41 and S42 cyclically; After step S41 is executed 3 times, the finished egg yolk oil can be obtained.

[0061] Comparative Example 3

[0062] S1: Crush the cooked egg yolk and dry it to obtain egg yolk powder.

[0063] S2: Fry the egg yolk powder until all the egg yolk oil is extracted, obtaining a residue-liquid mixture.

[0064] S3: Separate the residue-liquid mixture to obtain residue and filtrate; soak activated clay in the egg yolk oil for 24 h to obtain a purification agent; arrange a 100-cm-thick purification agent along the flowing direction of the filtrate, and let the filtrate pass through the purification agent at a speed of 2 cm / min to obtain crude oil.

[0065] S4: Package and seal the crude oil; then sterilize it according to the following steps: S41: Heat it in a water bath to 100 °C and keep it for 30 min; S42: Place it at room temperature of 30 °C for 24 h; S43: Repeat steps S41 and S42 cyclically; after step S41 is performed 3 times, the finished egg yolk oil can be obtained.

[0066] Comparative Example 4

[0067] S1: Crush the cooked egg yolk and dry it to obtain egg yolk powder.

[0068] S2: Fry the egg yolk powder until all the egg yolk oil is extracted, obtaining a residue-liquid mixture.

[0069] S3: Separate the residue-liquid mixture to obtain residue and filtrate; mix activated carbon and composite bactericide I according to a mass ratio of 100:1, then soak it in the egg yolk oil for 24 h to obtain a purification agent; arrange a 100-cm-thick purification agent along the flowing direction of the filtrate, and let the filtrate pass through the purification agent at a speed of 2 cm / min to obtain crude oil.

[0070] S4: Package and seal the crude oil; then sterilize it according to the following steps: S41: Heat it in a water bath to 100 °C and keep it for 30 min; S42: Place it at room temperature of 30 °C for 24 h; S43: Repeat steps S41 and S42 cyclically; after step S41 is performed 3 times, the finished egg yolk oil can be obtained.

[0071] In Example 7 and Comparative Examples 1-4, the processing device for egg yolk oil described in any one of Examples 1-6 can be used; store the filtrate in the liquid storage tank 1, and arrange the purification agent in the filter cartridge 9 of the purification tank 3; then let the filtrate slowly pass through the filter cartridge 9 to obtain crude oil.

[0072] In Example 7 and Comparative Examples 1-4, the processing device for egg yolk oil described in any one of Examples 3-6 can be used to separate the residue-liquid mixture to obtain residue and filtrate. The second filter cloth 18 for separating the residue-liquid mixture can adopt a specification of 200 meshes.

[0073] In Example 7 and Comparative Examples 1-4, the cooked egg yolks were obtained by steaming or boiling fresh eggs and then peeling off the eggshells and egg whites; the fresh eggs were cooked through after boiling in boiling water for 10 minutes or steaming for 15 minutes. In addition, after being crushed, the cooked egg yolks were spread to a thickness of 3 cm and dried with circulating hot air at 120 °C, being turned over every 30 min during the drying process, and the drying time was 3 h. The frying and stir-frying temperature of the egg yolk powder was 200 °C.

[0074] For Example 7, the purifying agent was continuously used for 10 days without replacement; samples of the prepared finished egg yolk oil were taken daily, and benzo[a]pyrene was measured. Then the purifying agent was maintained once, and then the purifying agent was continuously used for 10 days without replacement; samples of the obtained egg yolk oil were taken daily, and benzo[a]pyrene was measured. The measurement results are shown in Table 2 for details.

[0075] For Comparative Examples 1-4, the purifying agent was continuously used for 7 days without replacement; samples of the prepared finished egg yolk oil were taken daily, and benzo[a]pyrene was measured. The measurement results are shown in Table 2 for details.

[0076] Table 2. Benzo[a]pyrene measurement results of Example 7 and Comparative Examples 1-4 Time Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 Example 7 Not detected Not detected Not detected Not detected Not detected Not detected Not detected Control Example 1 45.7 50.2 55.6 58.4 63.1 65.3 69.8 Control Example 2 Not detected 71.2 144.9 197.2 201.3 197.6 203.7 Control Example 3 54.3 98.1 147.2 189.9 205.4 208.5 203.4 Control Example 4 75.8 78.1 84.6 88.3 91.7 98.5 97.9 Time Day 8 Day 9 Day 10 Day 11 Day 12 Day 13 Day 14 Example 7 Not detected Not detected Not detected Not detected Not detected Not detected Not detected Time Day 15 Day 16 Day 17 Day 18 Day 19 Day 20 Example 7 Not detected Not detected Not detected Not detected Not detected Not detected Note: The benzo[a]pyrene measurement results in Table 2 are in the unit of μg / kg; the measurement method of benzo[a]pyrene refers to GB5009.27-2016.

[0077] It can be seen from Table 2 that: For the egg yolk oil prepared in Example 7, benzo[a]pyrene was not detected for 20 consecutive days.

[0078] For the egg yolk oil prepared in Comparative Example 1, a small amount of benzo[a]pyrene was detected on the first day; from the second day to the seventh day, as the purifying agent was continuously used, the content of benzo[a]pyrene in the egg yolk oil gradually increased.

[0079] For the egg yolk oil prepared in Comparative Example 2, benzo[a]pyrene was not detected on the first day; from the second day to the seventh day, as the purifying agent was continuously used, the content of benzo[a]pyrene in the egg yolk oil increased rapidly.

[0080] For the egg yolk oil prepared in Comparative Example 3, a small amount of benzo[a]pyrene was detected on the first day; from the second day to the seventh day, as the purifying agent was continuously used, the content of benzo[a]pyrene in the egg yolk oil increased rapidly.

[0081] For the egg yolk oil prepared in Comparative Example 4, a medium amount of benzo[a]pyrene was detected on the first day; from the second day to the seventh day, as the purifying agent was continuously used, the content of benzo[a]pyrene in the egg yolk oil gradually increased.

[0082] It can be seen therefrom that for the preparation method of the egg yolk oil provided by the present invention, the purifying agent used contains activated clay, Lactobacillus rhamnosus with the preservation number of ACCC 05450, Lactobacillus with the preservation number of ACCC 03877, Actinoplanes missouriensis with the preservation number of CICC 11008, and Streptomyces olivaceus with the preservation number of CICC 23628; it can effectively remove benzo(a)pyrene in the filtrate. Moreover, the purifying agent has a long service life, does not need to be frequently replaced, has a low maintenance frequency, and is more convenient to operate, which is beneficial to cost reduction.

[0083] Samples were taken from the egg yolk oil prepared in Example 7, and the microbial content was detected. The detection results are shown in Table 3.

[0084] Table 3. Detection results of the microbial content in Example 7 Detection item Unit Detection result Detection method Total number of aerobic bacteria CFU / mL ＜1 Fourth Part of Chinese Pharmacopoeia (2020 Edition) Molds and yeasts CFU / mL ＜1 Fourth Part of Chinese Pharmacopoeia (2020 Edition) Salmonella / 10 mL Not detected Fourth Part of Chinese Pharmacopoeia (2020 Edition) Staphylococcus aureus / mL Not detected Fourth Part of Chinese Pharmacopoeia (2020 Edition) Escherichia coli / mL Not detected Fourth Part of Chinese Pharmacopoeia (2020 Edition) Pseudomonas aeruginosa / mL Not detected Fourth Part of Chinese Pharmacopoeia (2020 Edition) Bile salt - tolerant Gram - negative bacteria / mL Not detected Fourth Part of Chinese Pharmacopoeia (2020 Edition) As can be seen from Table 3, the preparation method of the egg yolk oil provided by the present invention can fully kill the microorganisms in the egg yolk oil. In addition, the intermittent sterilization method is adopted in the present invention, and the active ingredients in the egg yolk oil can be retained as much as possible.

[0085] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention, and these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A method for preparing egg yolk oil, characterized in that: The following steps are involved: S1: crushing cooked egg yolk and drying to obtain egg yolk powder; S2: frying the egg yolk powder until all the egg yolk oil comes out to obtain a residue-liquid mixture; S3: separating the residue-liquid mixture to obtain a filter residue and a filtrate; passing the filtrate through a purifying agent to remove benzo(a)pyrene in the filtrate to obtain a primary oil; S4: Packaging, sealing and sterilizing the primary processed oil to obtain finished egg yolk oil; in, In step S3, the purifier includes: activated clay and composite bacterial agent; the speed of the filtrate passing through the purifier is less than or equal to 2 cm / min; and the thickness of the purifier in the flow direction of the filtrate is greater than or equal to 100 cm.

2. The method for preparing egg yolk oil according to claim 1, characterized in that: In step S3, the mass ratio of the activated clay to the composite bacterial agent is 100:1; The composite bacterial agent comprises, by mass, one part of Lactobacillus rhamnosus with a strain collection number of ACCC 05450, one part of Lactobacillus with a strain collection number of ACCC 03877, one part of Actinomyces missouri with a strain collection number of CICC 11008, and one part of Streptomyces olive with a strain collection number of CICC 23628; The purifying agent is prepared by the following method: after mixing activated white clay and compound bacterial agent, soaking in egg yolk oil for 24 hours, the purifying agent can be prepared; The purifier put into use will be maintained every 10 days. The maintenance method is as follows: along the flow direction of the filtrate, 10 cm thick purifier is removed upstream and 10 cm thick activated white clay is added downstream.

3. The method for preparing egg yolk oil according to claim 1 or 2, characterized in that: In step S1, the cooked egg yolk is crushed and spread into a thickness of 3 cm, and dried using circulating hot air at 120° C. The egg yolk is turned over every 30 minutes during the drying process, and the drying time is 3 hours; In step S2, the frying temperature of the egg yolk powder is 200°C; In step S4, after the primary processed oil is packaged and sealed, the following steps are used to sterilize it: S41: Heat in a water bath to 100°C and maintain for 30 min; S42: Place at room temperature of 30°C for 24 hours; S43: cyclically execute step S41 and step S42; after step S41 is executed three times, the finished egg yolk oil can be obtained.

4. Egg yolk oil, characterized in that: The invention is prepared by the method for preparing egg yolk oil according to any one of claims 1 to 3.

5. An egg yolk oil processing device, used for processing the egg yolk oil according to claim 4; characterized in that: include: Liquid storage tank (1), extraction tank (2), purification tank (3); The lower part of the liquid storage box (1) is connected to the lower part of the pumping tank (2), and a first valve (4) is provided; The lower part of the extraction tank (2) is connected to the lower part of the purification tank (3), and a second valve (5) is provided; The upper portion of the purification tank (3) is provided with a liquid discharge port (6); The pumping tank (2) is provided with a piston (7) and is equipped with a first power source (8) for driving the piston (7) to move up and down; The purification tank (3) is provided with a filter cartridge (9) extending in an up-down direction to accommodate a purifying agent; the top of the purification tank (3) is provided with an opening for taking out and placing the filter cartridge (9); the opening is provided with a detachable cover plate (10).

6. The egg yolk oil processing device according to claim 5, characterized in that: The filter cartridge (9) comprises: a plurality of filter dishes (11) connected in sequence along the up-down direction; The upper section of the filter dish (11) is provided with an internal thread, and the lower section is provided with an external thread, and the upper and lower adjacent filter dishes (11) are threadedly connected; The uppermost filter dish (11) is provided with a dish cover (12), wherein the dish cover (12) is provided with an internal thread adapted to the filter dish (11); The dish cover (12) is provided with a plurality of filter holes penetrating vertically, and is provided with a handle (13); The bottom plate of the filter dish (11) is provided with a plurality of filter holes penetrating vertically, and is paved with a first filter cloth; The outer peripheral wall of the filter dish (11) is provided with an elastic sealing layer; A bracket (14) is provided at the bottom of the purification tank (3) to form a liquid inlet area below the filter cartridge (9); the pumping tank (2) is connected to the liquid inlet area; A gap is left between the top of the filter cartridge (9) and the cover plate (10) to form a liquid outlet area above the filter cartridge (9); the liquid discharge port (6) is arranged in the liquid outlet area.

7. The egg yolk oil processing device according to claim 5 or 6, characterized in that: The top plate (22) of the liquid storage tank (1) is provided with a liquid inlet (15) and is equipped with a separation mechanism; The separation mechanism comprises: a frame (16) arranged at the liquid inlet (15), a sieve plate (17) arranged in the frame (16), and a second filter cloth (18) laid on the sieve plate (17); The top plate (22) is provided with a mounting groove (19) surrounding the liquid inlet (15); the bottom of the mounting groove (19) supports the frame (16) and the sieve plate (17); the edge of the second filter cloth (18) is pressed between the bottom of the mounting groove (19) and the frame (16); An extrusion member (20) is provided above the sieve plate (17), and is equipped with a second power source (21) for driving the extrusion member (20) to move up and down.

8. The egg yolk oil processing device according to claim 7, characterized in that: The upper surfaces of the frame (16) and the top plate (22) are flush with the upper surface of the main body of the second filter cloth (18); The top plate (22) is provided with baffles (23) extending in the left-right direction on both sides of the front and rear of the liquid inlet (15); a slag pushing plate (24) extending in the front-back direction is provided between the two baffles (23); The left and right sides of the slag pushing plate (24) are respectively limited by first rollers (25), and the axle of the first roller (25) is oriented forward and backward; The first roller (25) is mounted on a wheel frame (26), and the wheel frame (26) is adapted to be driven by a third power source (27) for moving the first roller (25) left and right. The baffle (23) is provided with a mounting opening (28) penetrating from front to back, and a pressing block (29) is arranged at the mounting opening (28); A guide rod (30) is provided at the outer end of the pressing block (29), and a guide block (31) having a guide hole is provided on the top plate (22); the guide rod (30) passes through the guide hole, and a limit nut (32) is installed on the passing portion; The guide rod (30) is sleeved with a first compression spring (33) to drive the pressure block (29) to extend from the mounting opening (28) and limit the upper surface of the frame (16); the inner end surface of the pressure block (29) is a convex arc surface so that it can be retracted into the mounting opening (28) when the slag pushing plate (24) passes through and applies a force.

9. The egg yolk oil processing device according to claim 8, characterized in that: The left and right ends of the baffle (23) extend out of the edge of the top plate (22) to form an extended section; The baffle (23) has a plurality of wheel grooves (34) evenly arranged on the inner side surface along the up-down direction, and the wheel grooves (34) extend along the left-right direction to the extension section; The baffle (23) is provided with a left vertical groove (35) and a right vertical groove (36) at the extended sections at the left and right ends, respectively, so as to be connected to the left end and the right end of each wheel groove (34); The left vertical groove (35) extends to the bottom end of the baffle (23) and is equipped with a lifting mechanism; A plurality of second rollers (37) are respectively arranged at the front and rear ends of the slag pushing plate (24) in the up-down direction, and the wheel grooves (34) limit the second rollers (37); The number of wheel grooves (34) provided on the baffle plate (23) is greater than the number of second rollers (37) provided at one end of the slag pushing plate (24); When the slag pushing plate (24) moves to the left vertical groove (35), the lifting mechanism drives the slag pushing plate (24) to move upward, so that each second roller (37) rises to the wheel groove (34) of the upper level respectively; When the slag pushing plate (24) moves to the right vertical groove (36), it slides downward, and each second roller (37) respectively descends to the wheel groove (34) of the lower level.

10. The egg yolk oil processing device according to claim 9, characterized in that: The lifting mechanism comprises: a sealing member (38) installed at the bottom end of the left vertical groove (35), a second compression spring (39) installed at the top of the sealing member (38), and a lifting block (40) installed at the top of the second compression spring (39); The lifting block (40) has a slope surface (41) extending from the right side toward the upper left to the upper surface; When the lifting block (40) moves upward to the limit, the slope surface (41) extends from the bottom of the lowest wheel groove (34) to the bottom of the upper first-level wheel groove (34); A limiting rod (42) extending downward is provided at the bottom of the lifting block (40), and the sealing member (38) is provided with a limiting hole cooperating with the limiting rod (42); the second compression spring (39) is sleeved on the limiting rod (42).

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