Meat meal and hair separating device and method

Abstract

The invention relates to the technical field of food or feed processing, in particular to a meat meal and hair separating device and method. The separation device comprises a screen drum and an electrode bent plate; the axis of the screen drum is obliquely arranged, the front end of the screen drum is higher than the rear end of the screen drum, the front end of the screen drum is provided with a meat powder inlet, the rear end of the screen drum is provided with a hair blanking port, and screen holes are formed in the drum wall of the screen drum and used for screening out meat powder particles without hair; the multiple electrode bent plates are installed on the inner side of the cylinder wall of the screen cylinder in an insulated mode, negative charges are applied to all the electrode bent plates, and the electrode bent plates are used for stirring meat powder and adsorbing hair to be separated from meat powder particles. The separation method combining static electricity and machinery is adopted, the separation efficiency is improved, thorough separation of hair and meat powder particles is achieved, and therefore the quality and safety of meat powder are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of food or feed processing, and in particular to a meat powder and hair separation device and method. Background Art

[0002] Meat meal, a key ingredient in animal feed additives, seasonings, meat tenderizers, steamed meat meal, and other industrial applications, boasts high protein content and rich nutrition. However, due to the complexity of the raw materials used in meat meal production, some hair often remains. This not only affects the sensory quality of the meat meal but also carries microorganisms or other contaminants, increasing hygiene risks and potentially disrupting the amino acid balance of the meat meal. Therefore, effectively separating hair from meat meal is crucial.

[0003] Currently, existing technologies for separating hair from meat powder primarily include physical and chemical separation methods. Physical separation methods include air separation and mechanical friction separation. Air separation uses a negative pressure air cooler to air-separate the meat powder after fire separation, taking advantage of the light weight of the hair combustion products to remove them. Mechanical friction separation involves placing the meat powder in a sieve drum, which rotates to cause the meat powder to roll against each other, removing hair. Water spraying is also used to flush out impurities.

[0004] In practice, neither air separation nor mechanical friction separation methods can quickly and effectively separate hair from meat meal, resulting in a lengthy separation process. Furthermore, it's difficult to completely remove hair from meat meal, and a certain amount of hair may remain in the separated meat meal (i.e., the meat meal particles), failing to meet the production requirements for high-quality meat meal. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the purpose of the embodiments of the present invention is to provide a meat powder and hair separation device, which adopts a separation method that combines electrostatics and mechanics to improve separation efficiency and achieve complete separation of hair and meat powder particles, thereby effectively improving the quality and safety of meat powder.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions: A meat powder and hair separation device comprises: a sieve drum and an electrode bent plate; the axis of the sieve drum is arranged at an angle, wherein the front end of the sieve drum is higher than the rear end of the sieve drum, the front end of the sieve drum has a meat powder inlet, and the rear end of the sieve drum has a hair drop-out port, and the cylinder wall of the sieve drum is provided with sieve holes, which are used to sieve out meat powder particles with hair removed; there are multiple electrode bent plates, and the multiple electrode bent plates are insulated and installed on the inner side of the cylinder wall of the sieve drum, and negative charges are applied to all the electrode bent plates to move the meat powder and absorb hair to separate it from the meat powder.

[0007] Optionally, along the axial direction of the sieve cylinder, the diameter of the sieve holes opened at the front end of the cylinder wall is smaller than that of the sieve holes opened at the rear end of the cylinder wall.

[0008] Optionally, the electrode bent plate includes a mounting plate and an arc plate. The arc plate is mounted on the mounting plate, and the mounting plate is mounted on the cylinder wall of the sieve cylinder. The mounting plate is an insulating plate, and all the arc plates are made of metal and are connected by wires.

[0009] Optionally, the arc plate has an arc-shaped opening, and the arc-shaped opening faces the turning direction of the sieve cylinder.

[0010] Optionally, the arc plate is formed by cutting a conical cylinder along two cutting planes. Both of the two cutting planes pass through the axis of the conical cylinder. Along the axial direction of the sieve cylinder, the radius of the front end of the arc plate is smaller than that of the rear end.

[0011] Optionally, from the front end to the rear end of the sieve cylinder, multiple turns of the electrode bent plates are arranged. The arc plates are arranged with deflection relative to the axis of the sieve cylinder, and the deflection directions of the arc plates in the same turn are the same, while the deflection directions of the arc plates in adjacent turns are opposite.

[0012] Optionally, the separation device further includes a frame, the sieve cylinder is mounted on the frame, and a feed hopper is provided at the front end of the sieve cylinder.

[0013] Optionally, the separation device further includes a conveying device. The conveying device includes a meat powder conveying auger and a hair conveying auger. The meat powder conveying auger is arranged on the lower side of the sieve cylinder and is arranged along the axial direction of the sieve cylinder. The hair conveying auger is arranged on the lower side of the rear end of the sieve cylinder and is arranged along the direction perpendicular to the axis of the sieve cylinder.

[0014] The embodiment of the present invention also provides a separation method of the meat powder and hair separation device as described above, including the following steps: Convey the meat powder to be separated into the rotating sieve cylinder; Apply high-voltage direct current to the electrode bent plate to make the electrode bent plate carry negative charges; due to the action of the electric field, the hair and meat powder particles are positively charged by induction. During the rotation of the sieve cylinder, the meat powder rolls in the sieve cylinder and rubs against the electrode bent plate and itself. Among them, the hair in the meat powder loses electrons due to friction and carries strong positive charges, and the meat powder particles gain electrons due to friction and carry negative charges; Utilize the electrostatic field generated by the electrode bent plate carrying negative charges to adsorb the hair carrying strong positive charges and repel the meat powder particles, thereby separating the hair and the meat powder particles; During the rotation of the sieve cylinder, the meat powder particles from which the hair has been separated pass through the sieve holes and fall.

[0015] During the continuous rotation of the sieve cylinder, the hair adsorbed on the electrode bending plate accumulates due to adsorption and forms a spherical hair mass inside the arc plate. When the diameter of the spherical hair mass gradually increases and reaches a certain weight, it is thrown out from the arc plate, and the spherical hair mass is discharged through the opening at the rear end of the sieve cylinder.

[0016] Optionally, the humidity of the meat powder is not higher than 15%, the electric field strength applied to the electrode bending plate is 8000 - 9000V, the linear velocity of the sieve cylinder rotation is 3 - 4m / s, and the feeding speed of the meat powder is 40 - 60kg / min.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: The core structure of the meat powder and hair separation device: an inclined sieve cylinder (higher at the front end and lower at the rear end) and a negatively charged electrode bending plate. The inclined sieve cylinder design utilizes gravity to assist the movement of the meat powder from the front - end inlet to the rear - end outlet. The sieve holes on the wall of the sieve cylinder are used to screen out the pure meat powder particles after removing the hair. A plurality of electrode bending plates on the inner wall of the sieve cylinder are applied with negative charges. The electrode bending plates play a dual role: First, as a mechanical disturbance component, when the sieve cylinder rotates, it stirs and scatters the meat powder, increasing the collision and friction between the meat powder particles, the hair, and the meat powder and the bending plate; Second, as an electrostatic adsorption component, the strong negative charges carried by it generate an electrostatic field. Through mechanical disturbance (the electrode bending plate stirs + the sieve cylinder rotates), it compulsorily promotes the violent and continuous frictional contact between the meat powder particles and the hair, and between the hair and the electrode bending plate, creating the necessary conditions for subsequent charge separation based on the triboelectrification effect. At the same time, the electrostatic field (negative charge of the electrode bending plate) provides the acting forces of directional adsorption (for the hair) and repulsion (for the meat powder particles) for the hair (strongly positively charged) and the meat powder particles (negatively charged) after friction, fundamentally overcoming the problem of incomplete separation of fine hair caused by the traditional pure mechanical screening relying on size differences, and significantly improving the efficiency and purity of hair separation.

[0018] The advantages of the additional aspects of the present invention will be given in the following description, some of which will become obvious from the following description, or can be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In addition, the distances or sizes between components are exaggerated for showing the positions of each component, and the schematic diagrams are only for illustration purposes.

[0020] Figure 1 It is the front view of the separation device provided by the embodiment of the present invention; Figure 2 It is a side view of the separation device provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of the electrode bending plate provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the angles of the front and rear rows of electrode bending plates provided by an embodiment of the present invention; Figure 5 It is an effect diagram of the electrode bending plate installed on the sieve cylinder provided by an embodiment of the present invention; In the figure: 1, sieve cylinder; 2, ground wire; 3, electric shock prevention device; 4, meat powder conveying auger; 5, hair conveying auger; 6, electrostatic generator; 7, meat powder; 8, feed hopper; 9, frame; 10, electrode bending plate; 11, mounting plate; 12, arc plate; Detailed implementation manners It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Embodiment 1 As Figure 1 , Figure 2 shown, this embodiment proposes a meat powder 7 hair separation device, including a sieve cylinder 1 and an electrode bending plate 10; the axis of the sieve cylinder 1 is arranged obliquely, wherein the front end of the sieve cylinder 1 is higher than the rear end of the sieve cylinder 1, the front end of the sieve cylinder 1 has a meat powder 7 inlet, the rear end of the sieve cylinder 1 has a hair discharge port, and sieve holes are provided on the cylinder wall of the sieve cylinder 1, and the sieve holes are used to screen out meat powder particles from which hair has been removed; there are multiple electrode bending plates 10, and multiple electrode bending plates 10 are all installed on the inner side of the cylinder wall of the sieve cylinder 1 in an insulating manner, and negative charges are applied to all the electrode bending plates 10, which are used to stir the meat powder 7 and adsorb the hair to separate it from the meat powder particles.

[0022] Such a structural design utilizes the oblique arrangement of the sieve cylinder 1, and with the help of gravity, the meat powder 7 moves in the sieve cylinder 1. At the same time, the electrode bending plate 10 is negatively charged, and interacts with the hair that is positively charged due to electrostatic induction, realizing the separation of the hair and the meat powder particles, effectively solving the problems of low separation efficiency and incomplete separation in the prior art, and improving the separation effect.

[0023] Along the axial direction of the sieve cylinder 1, the diameter of the sieve holes opened at the front end of the cylinder wall is smaller than the diameter of the sieve holes opened at the rear end of the cylinder wall. Figure 1For the sake of clearly showing the structure, only partial sieve holes are shown. Among them, the diameter at position A-1 is φ2mm, the diameter at position A-2 is φ2mm, the diameter at position A-3 is φ3mm, the diameter at position A-4 is φ3mm, and the diameter at position A-5 is φ4mm. It can be understood that when the sieve cylinder is relatively long, the diameter at position A-6 at the rear end is φ4mm.

[0024] With this distribution method of sieve holes, the small-aperture sieve holes at the front end can first perform preliminary screening on the meat powder 7 entering the sieve cylinder 1, and sieve out the meat powder 7 with smaller particles. As the meat powder 7 moves backward, the large-aperture sieve holes at the rear end allow the remaining meat powder 7 to gradually pass through, realizing the gradual screening of the meat powder 7, ensuring that the meat powder 7 (especially the large-particle meat powder) can fully interact with the electrode bending plate 10, and avoiding the premature falling of the meat powder 7 due to too large sieve holes at the front end without sufficient separation of hair. Moreover, the gradually increasing sieve holes can make all meat powder particles fall from the sieve holes, thereby preventing the meat powder particles from being discharged from the rear end of the sieve cylinder 1. The size distribution of the sieve holes optimizes the entire screening and separation process, improving the screening efficiency and separation thoroughness.

[0025] As Figure 3 , Figure 5 shown, the electrode bending plate 10 includes a mounting plate 11 and an arc plate 12. The arc plate 12 is mounted on the mounting plate 11, and the mounting plate 11 is mounted on the cylinder wall of the sieve cylinder 1. The mounting plate 11 is an insulating plate, and all arc plates 12 are made of metal and are all connected by wires.

[0026] The insulating mounting plate 11 ensures the electrical isolation between the electrode bending plate 10 and the cylinder wall of the sieve cylinder 1, preventing charge leakage or short circuit. The connection of all arc plates 12 by wires ensures that the entire electrode bending plate 10 array is at the same negative electric potential, forming a uniform electrostatic field covering the working area inside the sieve cylinder 1. The arc plate 12 made of metal not only ensures good electrical conductivity to carry high voltage, but its surface characteristics are also more conducive to the occurrence of charge transfer (triboelectrification).

[0027] As Figure 1 shown, the separation device is also equipped with an electrostatic generator 6. The electrostatic generator 6 converts low-voltage alternating current into high-voltage direct current. It can be understood that a brush rotating ring structure is provided on the sieve cylinder 1. The electrostatic generator 6 is connected to the brush rotating ring structure, and the brush rotating ring structure is connected to all electrode bending plates 10, realizing the electrical connection in the rotating state through the brush rotating ring structure.

[0028] The arc-shaped plate 12 has an arc-shaped opening that faces the turning direction of the sieve cylinder 1. When the sieve cylinder 1 rotates in the set direction, the arc-shaped opening faces the incoming material direction, enabling it to more efficiently "catch" the meat powder 7, increasing the frequency and intensity of the mutual collision and rolling between the meat powder particles and the frictional contact between the meat powder 7 and the inner wall of the arc-shaped plate 12, providing more favorable conditions for the triboelectrification effect, and thus strengthening the degree of charge separation between the hair and the meat powder particles (the hair becomes more positively charged and the meat powder particles become negatively charged). On the other hand, the adsorbed hair can gradually accumulate within the arc-shaped opening to form a hair ball.

[0029] The arc-shaped plate 12 is formed by cutting a conical cylinder along two cutting planes, both of which pass through the axis of the conical cylinder. Along the axial direction of the sieve cylinder 1, the radius of the front end of the arc-shaped plate 12 is smaller than that of the rear end. Specifically, the radius of the front end is 4 mm, and the radius of the rear end is 16.1 mm.

[0030] This gradually expanding (similar to a flared shape) geometric shape has the following technical effects: ① Guiding the flow of the meat powder 7: The small front opening is conducive to receiving and guiding the meat powder 7 into the interior of the arc-shaped plate 12; the large rear opening facilitates the smooth ejection of the accumulated hair ball when it reaches a certain size and weight. ② Promoting the formation of the hair ball: The gradually expanding space provides a natural "accumulation area" for the adsorbed hair. As the hair is continuously adsorbed and rolls with the sieve cylinder 1, they are more likely to entangle and accumulate with each other inside the arc-shaped plate 12, gradually forming a tight spherical hair ball. ③ Facilitating the release of the hair ball: The larger diameter at the rear end enables the formed hair ball to more easily overcome the electrostatic adsorption and the restraint of the curved surface of the arc-shaped plate 12 when it reaches the critical size (diameter larger than the rear sieve holes) and weight, and is ejected from the rear opening and falls into the hair conveying auger 5.

[0031] From the front end to the rear end of the sieve cylinder 1, multiple turns of the electrode bent plate 10 are arranged (in this embodiment, 6 turns are set, with 6 electrode bent plates 10 distributed circumferentially in each turn, and the axial interval between adjacent turns along the sieve cylinder 1 is 150 mm). The arc-shaped plate 12 is arranged with a deflection relative to the axis of the sieve cylinder 1. In this embodiment, the axis of the arc-shaped plate 12 forms a 15° angle with the axis of the sieve cylinder 1, and the deflection directions of the arc-shaped plate 12 in the same turn are the same, while the deflection directions of the arc-shaped plate 12 in adjacent turns are opposite. As Figure 4 shown, the angle of the previous turn is 15° (left deviation of 15° when viewed along the axis direction), and the angle of the next turn is -15° (right deviation of 15° when viewed along the axis direction).

[0032] This alternating deflection design forms a complex material flow: when the meat powder 7 is flicked and scattered in a certain direction by a row (circle) of arc-shaped plates 12 with the same direction of deflection, it falls into the area of the next row of arc-shaped plates 12 with opposite deflection, and the flow direction of the meat powder 7 is forced to change. This continuous, alternately directed flicking action causes the meat powder 7 to not simply move linearly towards the outlet within the sieve cylinder 1, but rather form a violent, almost tumbling "wave-like" or "spiral" motion. The strong reverse perturbation significantly delays the overall axial (towards the rear end outlet) movement speed of the meat powder 7 within the sieve cylinder 1, greatly increasing the residence time of the meat powder 7 within the effective working area. The violent tumbling motion greatly increases the contact, collision, and friction opportunities between the meat powder 7 and between the meat powder 7 and each row of electrode bending plates 10, maximizing the triboelectrification effect and ensuring that the hair is fully charged and adsorbed. Moreover, the continuous perturbation prevents the meat powder 7 from accumulating or adhering in local areas, reducing the risk of sieve hole blockage and ensuring the continuity and stability of the separation process.

[0033] The separation device further includes a frame 9, on which the sieve cylinder 1 is installed. The frame 9 provides a firm and reliable foundation for the stable rotation of the sieve cylinder 1, ensuring smooth operation of the device and reducing interference from vibration to the separation process. An electric shock prevention device 3 is also provided on the frame 9, and the frame 9 is grounded through a ground wire 2 to ensure electrical safety. A feed hopper 8 is provided at the front end of the sieve cylinder 1. The feed hopper 8 is an optimized structure for the inlet of the meat powder 7, which centrally and orderly guides the meat powder 7 to be processed into the front end inlet of the sieve cylinder 1, preventing the meat powder 7 from scattering.

[0034] The separation device further includes a conveying device, which includes a meat powder conveying auger 4 and a hair conveying auger 5. The meat powder conveying auger 4 is arranged on the lower side of the sieve cylinder 1 and along the axial direction of the sieve cylinder 1. The hair conveying auger 5 is arranged on the lower side at the rear end of the sieve cylinder 1 and along the direction perpendicular to the axis of the sieve cylinder 1.

[0035] The meat powder conveying auger 4 is arranged along the entire length of the sieve cylinder 1 directly below it, and can timely and completely collect the pure meat powder particles falling from the sieve holes at various parts of the sieve cylinder 1, and axially convey them to the designated collection point using the spiral conveying principle of the auger. The hair conveying auger 5 is independently arranged below the rear end of the sieve cylinder 1 and is specifically used to collect the spherical hair masses discharged from the rear end opening. The meat powder conveying auger 4 and the hair conveying auger 5 spatially separate the collection path (axially below) of the pure meat powder particles from the discharge and collection path (vertically below the rear end) of the hair masses, effectively preventing accidental contact or secondary mixing between the separated pure meat powder particles and the discharged hair masses, and ensuring the purity of the final product. The two augers achieve the automatic and continuous conveying of the separated products, enabling the entire separation process to operate efficiently and continuously, meeting the requirements of industrial production.

[0036] Example 2 This embodiment provides a separation method for the meat powder and hair separation device as described in Embodiment 1, including the following steps: Frictional electrification enhancement mechanism: When the sieve cylinder 1 does not rotate, under the induction of the electrostatic field, both the hair and the meat powder particles carry weak positive charges. After the sieve cylinder 1 rotates, due to the differences in their atomic structures (electron binding forces) and physical properties (micro-protrusions and moisture content on the hair surface), charge transfer occurs. The hair loses electrons to generate positive charges, and conversely, the meat powder particles gain electrons to generate negative charges. As the rotation speed of the sieve cylinder 1 increases, under the action of intense mechanical disturbances (rolling and friction), the hair continuously loses electrons due to friction and carries "strong positive charges", while the negative charges of the meat powder particles gradually increase, amplifying the charge difference between the hair and the meat powder particles.

[0037] Separation process: Convey the meat powder 7 to be separated into the rotating sieve cylinder 1; Apply high-voltage direct current to the electrode bent plate 10 to make the electrode bent plate 10 carry negative charges; The hair and the meat powder particles carry positive charges through induction. During the rotation of the sieve cylinder 1, the meat powder 7 rolls in the sieve cylinder 1 and rubs against the electrode bent plate 10 and itself. Among them, the hair in the meat powder 7 loses electrons due to friction and carries strong positive charges, and the meat powder particles gain electrons due to friction and carry negative charges; the electrode bent plate 10 with strong negative charges generates a strong attraction to the hair with strong positive charges, causing it to be adsorbed on the arc-shaped plate 12; at the same time, it generates a repulsive force on the meat powder particles with negative charges, causing the two to be separated.

[0038] The meat powder particles with negative charges pass through the sieve holes with corresponding apertures under the action of gravity and are continuously collected by the meat powder conveying auger 4 below.

[0039] The adsorbed hair accumulates continuously during continuous rolling and forms a spherical hair mass by winding in a specific geometric space on the arc-shaped plate 12. When the diameter of the hair mass increases (exceeds the aperture of the rear sieve holes) and the accumulated weight is sufficient to overcome the electrostatic adsorption and the restraint of the curved surface of the arc-shaped plate 12, it is thrown out of the rear opening of the sieve cylinder 1 and falls into the hair conveying auger 5 to be collected and removed.

[0040] This method realizes the efficient, highly selective, and automated separation of hair and meat powder particles through the ingenious combination and enhancement of mechanical friction and the electrostatic field, solving the problems of incomplete separation, low efficiency, and easy blockage in traditional screening separation. From the conveying of the meat powder 7, the application of the electric field, the rotation of the sieve cylinder 1 to the collection of the hair and the meat powder 7 and other links are closely connected, ensuring the efficient and stable progress of the separation process, meeting the requirements of high-quality meat powder 7 production, and improving the sensory quality, hygienic safety, and amino acid balance of the meat powder 7.

[0041] The humidity of meat powder 7 is not higher than 15%, the electric field strength applied to the electrode bending plate 10 is 8000 - 9000 V, the linear velocity of the sieve cylinder 1 rotating is 3 - 4 m / s, and the feeding speed of meat powder 7 is 40 - 60 kg / min.

[0042] These parameters have been experimentally verified and there is a close synergistic relationship, jointly ensuring efficient and stable separation: Humidity control (≤15%): It is a prerequisite for effective triboelectrification. Too low humidity will weaken conductivity and affect charge transfer; too high humidity (>15%) is likely to cause adhesion of meat powder 7, clogging of sieve holes, and may cause charge leakage, seriously weakening the electrostatic adsorption effect. Controlling it below 15% ensures that meat powder 7 has good loose fluidity, friction characteristics, and appropriate conductivity, which is conducive to the effective transfer and accumulation of charges.

[0043] Electric field strength (8000 - 9000 V): This range is the key to balancing the separation force and safety / energy consumption. Too low (<8000 V) means insufficient electrostatic field strength, weak adsorption force on hair, and low separation efficiency; too high (>9000 V) can enhance the adsorption force, but may cause air breakdown discharge (generate ozone, increase energy consumption), increase the insulation requirements of the equipment and safety risks. Preferably, the electric field strength is 8500 V.

[0044] Linear velocity of sieve cylinder 1 (3 - 4 m / s): It directly affects the mechanical disturbance intensity and the residence time of meat powder 7. Too low speed (<3 m / s) means insufficient tumbling friction of meat powder 7, poor charge separation effect, and too fast axial movement of meat powder 7, insufficient residence time; too high speed (>4 m / s) means too large centrifugal force, causing the uncharged meat powder 7 to be thrown to the cylinder wall or the rear end prematurely, and even affecting the stable formation and discharge of hair tufts. Preferably, the linear velocity of sieve cylinder 1 is 3.297 m / s.

[0045] Feeding speed (40 - 60 kg / min): It needs to match the processing capacity of the equipment (size of sieve cylinder 1, linear velocity, electric field strength). Too low (<40 kg / min) results in low equipment utilization rate; too high (>60 kg / min) will cause overload of meat powder 7 in sieve cylinder 1, hinder the effective tumbling friction of meat powder 7, increase the screening burden, and lead to insufficient separation or even clogging. Preferably, the feeding speed is 50 kg / min.

[0046] The above parameters influence and restrict each other. At an appropriate humidity, the linear velocity determines the friction intensity, the electric field strength determines the adsorption force, and the feeding speed determines the effective load of meat powder 7 under friction and electrostatic action per unit time. The range combination given above ensures that the hair is fully charged and efficiently adsorbed, the meat powder particles are effectively screened out, and the hair tufts are smoothly formed and discharged, thus achieving high separation efficiency, high recovery rate of meat powder 7, and continuous and stable operation of the equipment.

[0047] Although the specific implementation manners of the present invention have been described above in conjunction with the accompanying drawings, they do not limit the protection scope of the present invention. Those skilled in the art should understand that various modifications or deformations that can be made without creative efforts on the basis of the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A meat powder and hair separation device, characterized in that Comprising: A sieve tube and an electrode bending plate; The axis of the sieve tube is arranged obliquely, with the front end of the sieve tube higher than the rear end. The front end of the sieve tube has a meat powder inlet, the rear end of the sieve tube has a hair discharge port, and sieve holes are provided on the wall of the sieve tube. The sieve holes are used to screen out meat powder particles with hair removed; There are multiple electrode bending plates. The multiple electrode bending plates are all installed inside the wall of the sieve tube in an insulated manner, and negative charges are applied to all the electrode bending plates, which are used to stir the meat powder and adsorb the hair to separate it from the meat powder particles.

2. The meat powder and hair separation device according to claim 1, characterized in that, Along the axial direction of the sieve tube, the diameter of the sieve holes opened at the front end of the tube wall is smaller than the diameter of the sieve holes opened at the rear end of the tube wall.

3. The meat powder and hair separation device according to claim 1, characterized in that, The electrode bending plate includes a mounting plate and an arc plate. The arc plate is mounted on the mounting plate, and the mounting plate is mounted on the wall of the sieve tube. The mounting plate is an insulating plate, and all the arc plates are made of metal and are connected by wires.

4. The meat powder and hair separation device according to claim 3, characterized in that, The arc plate has an arc-shaped opening, and the arc-shaped opening faces the turning direction of the sieve tube.

5. The meat powder and hair separation device according to claim 4, characterized in that, The arc plate is formed by cutting a conical cylinder along two cutting surfaces. Both of the two cutting surfaces pass through the axis of the conical cylinder. Along the axial direction of the sieve tube, the radius of the front end of the arc plate is smaller than the radius of the rear end.

6. The meat powder and hair separation device according to claim 5, wherein, From the front end to the rear end of the sieve tube, the electrode bending plates are arranged in multiple circles. The arc plates are deflected relative to the axis of the sieve tube, and the deflection directions of the arc plates in the same circle are the same, while the deflection directions of the arc plates in adjacent two circles are opposite.

7. The meat powder and hair separation device according to claim 1, characterized in that, The separation device further includes a frame, the sieve tube is mounted on the frame, and a feed hopper is provided at the front end of the sieve tube.

8. The meat powder and hair separation device according to claim 7, characterized in that, The separation device further includes a conveying device. The conveying device includes a meat powder conveying auger and a hair conveying auger. The meat powder conveying auger is arranged under the sieve tube and along the axial direction of the sieve tube, and the hair conveying auger is arranged under the rear end of the sieve tube and along the direction perpendicular to the axis of the sieve tube.

9. A separation method of the meat powder and hair separation device according to any one of claims 1-8, characterized in that, Including the following steps: Convey the meat powder to be separated into the rotating sieve tube; Apply high-voltage direct current to the electrode bending plate to make the electrode bending plate carry negative charges; The hair and meat powder particles are positively charged through induction. During the rotation of the sieve tube, the meat powder rolls in the sieve tube and rubs against the electrode bending plate and itself. Among them, the hair in the meat powder loses electrons due to friction and carries a strong positive charge, and the meat powder particles gain electrons due to friction and carry a negative charge; Utilize the electrostatic field generated by the electrode bending plate carrying negative charges to adsorb the hair carrying strong positive charges and repel the meat powder particles, thereby separating the hair and the meat powder particles; During the rotation of the sieve tube, the meat powder particles with hair separated pass through the sieve holes and fall; The hair adsorbed on the electrode bending plate forms a spherical hair mass in the arc plate due to adsorption accumulation during the continuous rotation of the sieve tube. When the diameter of the spherical hair mass gradually increases and reaches a certain weight, it is thrown out from the arc plate, and the spherical hair mass is discharged through the opening at the rear end of the sieve tube.

10. The separation method of the meat powder and hair separation device according to claim 9, characterized in that, Control the humidity of the meat powder not to be higher than 15%, the electric field intensity applied to the electrode bending plate is 8000 - 9000V, the linear velocity of the sieve tube rotation is 3 - 4m / s, and the feeding speed of the meat powder is 40 - 60kg / min.

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