Processing equipment and process for producing high-protein feed additive from kitchen waste as raw material

Abstract

The present application relates to kitchen garbage processing technical field, specifically speaking, it is a kind of kitchen garbage as raw material production high-protein feed additive processing equipment and process;Including drying equipment;The drying equipment includes box and the box left and right side is provided with drying hole with filter screen;The upper and lower end surface of the box is respectively provided with inlet and outlet;The box is supported by support;The upper position of the inside of the box is rotatably connected with two upper rollers;The lower position of the inside of the box is rotatably connected with two lower rollers;The outside of single upper roller and single lower roller is transmissionally connected with mesh belt;The width of the mesh belt is adapted to the front and back distance of the inside of the box;The mixture in drying gap is rubbed by two mesh belts with differential speed, so that wet residue can be mixed with thick pulp while being spread and dried, and then mixing and drying are integrated, the production efficiency of feed additive is improved and the quality of product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen waste treatment, in particular to a treatment equipment and process for producing high-protein feed additive by using kitchen waste as raw material. BACKGROUND

[0002] Kitchen waste is formed in the process of consumption of catering industry, canteen and family life.

[0003] In the process of producing high-protein feed additive by using kitchen waste as raw material, the mixing and drying of wet residue and thick slurry is a key step. The existing process has obvious defects in this step. The mixing of wet residue and thick slurry mainly depends on traditional stirring equipment or natural mixing in simple conveying process. Wet residue is a solid granular material containing protein, and thick slurry is a high-viscosity fluid. The physical form of the two is quite different. Static mixing or low-intensity stirring can easily cause the thick slurry to agglomerate and form clumps, which cannot fully contact with the wet residue. This results in uneven distribution of nutrient components in the mixed material, and the agglomeration of wet residue makes it difficult for the thick slurry to penetrate. After drying, the product is prone to "dry outside and wet inside" or "local nutrient deficiency", which affects the quality stability.

[0004] At the same time, mixing and drying need to be implemented in two independent steps. After stirring in the mixing equipment, the material is transferred to the drying equipment for processing. The process is complicated, and the material is prone to moisture fluctuation during the connection process. Therefore, the drying time needs to be prolonged to ensure that the final moisture meets the standard, which increases the heat consumption. In addition, the idle waiting time of the equipment overlaps due to the separate operation, which cannot form a continuous production process, reduces the overall processing efficiency, and is difficult to adapt to the demand of large-scale kitchen waste treatment. Moreover, the wet residue in the form of clumps cannot effectively penetrate the heat during drying, which requires higher temperature or longer time to remove the internal moisture, which easily causes the surface material to be overheated and the protein to be denatured, thereby destroying the nutritional activity of the product. SUMMARY

[0005] In order to make up for the shortcomings of the prior art, the present application provides a treatment equipment and process for producing high-protein feed additive by using kitchen waste as raw material. The present application uses two mesh belts with different speeds to rub the mixed material in the drying gap, so that the wet residue can be mixed with the thick slurry while being spread and dried. Thus, the mixing and drying are integrated, which improves the production efficiency and product quality of the feed additive.

[0006] The technical scheme adopted by the present application to solve its technical problems is: the processing equipment for producing high-protein feed additive from kitchen garbage as raw material, comprising a drying device; the drying device comprises a box body and drying holes with filter screens provided through the left and right sides of the box body; the upper and lower end faces of the box body are respectively provided with a feeding port and a discharging port; the box body is supported by a support; two upper rollers are rotatably connected at the upper position on the inner side of the box body; two lower rollers are rotatably connected at the lower position on the inner side of the box body; a mesh belt is drivingly connected to the outer side of each of the upper roller and the lower roller; the width of the mesh belt is adapted to the distance between the front and back of the inner side of the box body; the lower roller is driven by an inner motor; the two mesh belts are opposite in transmission direction and different in speed; one side of the two mesh belts close to each other is a drying surface; the transmission speed of the drying surface from top to bottom is greater than that of the drying surface from bottom to top; hot air can pass through the two mesh belts left and right along the drying holes; the slurry pipe passes through the upper position of the box body from front to back; the slurry pipe is provided with a slurry discharge hole aligned with the space between the two drying surfaces.

[0007] Preferably, the feeding port of the box body is fixedly connected with a feeding hopper with the opening upward; the middle cylindrical area of the feeding hopper is rotatably connected with an upper partition rod driven by an upper motor; the outer wall of the upper partition rod is fixedly connected with a plurality of upper partition plates in movable sealing contact with the inner wall of the feeding hopper; the discharging port of the box body is fixedly connected with a discharging hopper with the opening downward; the middle cylindrical area of the discharging hopper is rotatably connected with a lower partition rod driven by a lower motor; the outer wall of the lower partition rod is fixedly connected with a plurality of lower partition plates in movable sealing contact with the inner wall of the discharging hopper.

[0008] Preferably, the box body is symmetrically provided with a chute on the inner wall of the front and back; the front and back chutes are sealingly connected to the two U-shaped plates in sliding direction along the left and right directions; the box body is provided with a square casing protruding forward; the two inner motors are slidingly connected inside the casing; the upper roller is movably connected to the upper position inside the U-shaped plate; the lower roller is rotatably connected to the lower position inside the U-shaped plate; the two U-shaped plates pass through and are threadedly drivingly connected to a screw rod; the screw rod is rotatably and sealingly connected to the box body; the screw rod is oppositely provided with threads at the two ends; the screw rod is driven by an outer motor.

[0009] Preferably, an arc-shaped groove is provided through the front and back of the upper position inside the U-shaped plate; the arc center of the arc-shaped groove corresponds to the central axis of the lower roller; the end of the upper roller is movably connected in the arc-shaped groove; a stop block is movably connected in the arc-shaped groove; the stop block and the inner wall of the arc-shaped groove are connected by a first spring; the stop block is abutted on the outer wall of the end of the upper roller by the first spring.

[0010] Preferably, a plurality of groups of material breaking blocks are provided on the outer wall of the mesh belt along the transmission direction; each group of material breaking blocks on the two mesh belts is staggered in the front and back direction.

[0011] Preferably, the position of each group of broken material blocks on the drying surface in the vertical direction is gradually changed; the height positions of the adjacent two groups of broken material blocks on the drying surface gradually change in opposite directions.

[0012] Preferably, a top rod is fixedly connected to the top of the inner side of the box; the outer wall of the top rod is rotationally connected to the guide plate by a torsion spring; the lower end of the guide plate extends to the upper end of the drying gap.

[0013] Preferably, the guide plate is composed of a plurality of sub-plates that are in movable contact with each other; the sub-plates are rotationally connected to the top rod by independent torsion springs.

[0014] Preferably, a bottom groove is arranged at the lower position of the inner side of the U-shaped plate; the bottom groove is long strip-shaped, and the length direction of the bottom groove is the front-rear direction; a plurality of bottom blocks are slidably connected in the bottom groove; the bottom blocks are connected to the bottom of the bottom groove by second springs; and the adjacent two bottom blocks are in movable contact.

[0015] A processing technology for producing high-protein feed additives by using kitchen garbage as raw materials, which is applicable to the processing equipment for producing high-protein feed additives by using kitchen garbage as raw materials, and the steps of the processing technology are as follows:

[0016] S1, impurity removal and slurry preparation of kitchen garbage: the garbage contained in the kitchen garbage is subjected to impurity removal to obtain slurry;

[0017] S2, enzymolysis and sterilization: the slurry in S1 is subjected to enzymolysis and heat sterilization to form high-temperature slurry;

[0018] S3, three-phase separation for oil extraction: the high-temperature slurry in S2 is introduced into a three-phase centrifuge for oil-water residue separation;

[0019] S4, wet residue drying and centrifugal clear liquid evaporation: the wet residue after three-phase separation in S3 is dried by using a drying device, and the centrifugal clear liquid separated by the three-phase separator is subjected to multi-effect evaporation by using the secondary steam generated by the drying device as a heat source, and the concentrated slurry obtained after concentration is dried together with the wet residue to produce high-protein feed additives;

[0020] S5, anaerobic and aerobic treatment of waste water: the condensed waste water after multi-effect evaporation in S4 is subjected to anaerobic and aerobic treatment and then discharged.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The present application can mix and dry the wet residue and the concentrated slurry at the same time by using two mesh belts with different speeds to rub the mixture in the drying gap, thereby integrating the mixing and drying, and improving the production efficiency and quality of the feed additives.

[0023] 2. The outer motor rotates the screw during rotation, the threads on both ends of the screw are oppositely arranged, the screw is in threaded transmission connection with the U-shaped plate, so that the rotation of the screw can realize the mutual approach or mutual departure of the two U-shaped plates along the sliding groove, and the size of the gap between the two mesh belts directly affects the discharge specification of the mixed materials, thereby meeting different feed additive production requirements.

[0024] 3. The upper end of the mesh belt is arranged to be movable, and the elastic force of the first spring is matched, so that the upper end of the drying gap can change with the change of the amount of dried materials, thereby ensuring the rubbing effect of the mixed materials while meeting different drying amounts. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described below in combination with the drawings and embodiments.

[0026] Figure 1 is a perspective view of the drying equipment in the application;

[0027] Figure 2 is a sectional view of the application;

[0028] Figure 3 is Figure 2 an enlarged view of A in the figure;

[0029] Figure 4 is Figure 2 an enlarged view of B in the figure;

[0030] Figure 5 is a perspective view of the U-shaped plate and the mesh belt in the application;

[0031] Figure 6 is Figure 5 a perspective view from another angle;

[0032] Figure 7 is a process flow diagram in the application.

[0033] In the figure: box 1, drying hole 11, filter screen 12, feed inlet 13, discharge outlet 14, support 15, sliding groove 16, machine shell 17, upper roller 2, mesh belt 21, drying surface 22, material breaking block 23, lower roller 3, inner motor 31, slurry pipe 4, slurry discharge hole 41, feed hopper 5, upper spacer 51, upper motor 52, upper partition plate 53, discharge hopper 6, lower spacer 61, lower motor 62, lower partition plate 63, U-shaped plate 7, screw 71, outer motor 72, arc-shaped groove 73, stop block 74, first spring 75, bottom groove 76, bottom block 77, second spring 78, top rod 8, torsional spring 81, guide plate 82, material distribution plate 821. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0035] As shown in Figures 1 to 7 the present application includes the following embodiments:

[0036] Embodiment 1: A processing device for producing high-protein feed additives from kitchen waste as raw material, comprising a drying device; the drying device comprises a box body 1 and drying holes 11 with filter screens 12 provided through the left and right sides of the box body 1; the upper and lower end faces of the box body 1 are respectively provided with a feeding port 13 and a discharging port 14; the box body 1 is supported by a support 15; two upper rollers 2 are rotatably connected to the upper inside of the box body 1; two lower rollers 3 are rotatably connected to the lower inside of the box body 1; a mesh belt 21 is drivingly connected to the outside of a single upper roller 2 and a single lower roller 3; the width of the mesh belt 21 is adapted to the front-to-back distance of the inside of the box body 1; the lower roller 3 is driven by an inner motor 31; the two mesh belts 21 have opposite transmission directions and different speeds; one side of the two mesh belts 21 close to each other is a drying surface 22; the transmission speed of the drying surface 22 driven from top to bottom is greater than that of the drying surface 22 driven from bottom to top; hot air can pass through the two mesh belts 21 along the drying holes 11 left and right; the upper position of the box body 1 passes through a pulp pipe 4 front and back; the pulp pipe 4 is provided with pulp discharge holes 41 aligned with the space between the two drying surfaces 22.

[0037] The drying hole 11 on the right side of the box 1 is connected with an air inlet pipeline (not shown in the figure), the drying hole 11 on the left side of the box 1 is connected with an air outlet pipeline (not shown in the figure), the gas is heated and enters into the inside of the box 1 along the air inlet pipeline and the drying hole 11 on the right side, the hot gas in the inside of the box 1 passes through the two mesh belts 21 from right to left and is discharged along the drying hole 11 on the left side and the air outlet pipeline; for the convenience of description, the space between the two drying surfaces 22 is called a drying gap, the wet residue enters into the inside of the box 1 along the feeding port 13 and falls in the upper position of the drying gap, the pump body (not shown in the figure) such as a sludge pump discharges the thick slurry along the discharge hole 41 on the slurry pipe 4, the thick slurry contains a large amount of effective substances, the thick slurry is evenly discharged on the wet residue in the upper position of the drying gap, the two inner motors 31 drive the corresponding lower rollers 3 to rotate, the rotating directions of the two lower rollers 3 are opposite, in the front side view, the mesh belt 21 on the left side is counterclockwise transmission, the mesh belt 21 on the right side is clockwise transmission, the transmission speed of the mesh belt 21 on the left side is less than that of the mesh belt 21 on the right side, the drying surface 22 on the mesh belt 21 on the left side rubs the wet residue in the drying gap upward, the drying surface 22 on the mesh belt 21 on the right side rubs the wet residue in the drying gap downward, so that the wet residue in the drying gap is spread under the rubbing of the two drying surfaces 22, the spread wet residue can be fully contacted and mixed with the thick slurry dropped into the drying gap, in the process that the wet residue in the drying gap is rubbed and mixed with the thick slurry, the hot gas passes through the mesh belt 21 from right to left, the two drying surfaces 22 of the mesh belt 21 can be permeable, but cannot permeate the thick slurry and the wet residue, so the thick slurry and the wet residue are limited in the drying gap and spread, after the hot gas passes through the mixture of the spread wet residue and the thick slurry, the water in the mixture is vaporized by the hot gas, the water vapor flows with the hot gas, and the mixture is dried, since the transmission speed of the mesh belt 21 on the right side is greater than that of the mesh belt 21 on the left side, the downward transmission speed of the drying surface 22 on the right side is greater than the upward transmission speed of the drying surface 22 on the left side, so the mixture in the drying gap moves downward under the rubbing, and the water content of the mixture gradually decreases, under the condition that the two mesh belts 21 have a speed difference, increasing the speed of the two mesh belts 21 can prolong the drying time of the mixture, so compared with the existing long-volume drying equipment, the equipment occupied volume is greatly saved; the mixture after drying is removed from the lower end of the drying gap and finally discharged along the discharge port 14 to form the feed additive; the wet residue continuously falls into the upper end of the drying gap, and the thick slurry flows out of the outer wall of the slurry pipe 4 with the entering of the wet residue;

[0038] The two mesh belts 21 with a speed difference rub the mixture in the drying gap, so that the wet residue can be mixed with the thick slurry and spread and dried at the same time, and the mixing and drying are integrated, the production efficiency and the product quality of the feed additive are improved.

[0039] The embodiment 2: the feeding port 13 of the box 1 is upwardly and fixedly connected with a feeding hopper 5; the middle cylindrical area of the feeding hopper 5 is rotatably connected with an upper partition rod 51 driven by an upper motor 52; the outer wall of the upper partition rod 51 is fixedly connected with a plurality of upper partition plates 53 in movable sealing contact with the inner wall of the feeding hopper 5; the discharging port 14 of the box 1 is downwardly and fixedly connected with a discharging hopper 6; the middle cylindrical area of the discharging hopper 6 is rotatably connected with a lower partition rod 61 driven by a lower motor 62; the outer wall of the lower partition rod 61 is fixedly connected with a plurality of lower partition plates 63 in movable sealing contact with the inner wall of the discharging hopper 6.

[0040] In the embodiment, the outer wall of the upper motor 52 is fixedly connected with the front outer wall of the feeding hopper 5, and the outer wall of the lower motor 62 is fixedly connected with the front outer wall of the discharging hopper 6. The upper motor 52 drives the upper partition rod 51 to rotate, and the plurality of upper partition plates 53 on the outer wall of the upper partition rod 51 rotate during the rotation of the upper partition rod 51. During the rotation of the upper partition plates 53, on the one hand, the feeding port 13 of the box 1 is shielded to prevent hot gas from flowing out, and on the other hand, wet slag can be fed. After the wet slag is poured into the upper end of the feeding hopper 5, the wet slag falls on the upper partition plates 53 and moves from the upper part to the lower part of the feeding hopper 5 as the upper partition plates 53 rotate. The wet slag enters the drying gap through the feeding port 13 of the box 1. The lower motor 62 drives the lower partition rod 61 to rotate, and the plurality of lower partition plates 63 on the outer wall of the lower partition rod 61 rotate during the rotation of the lower partition rod 61. During the rotation of the lower partition plates 63, on the one hand, the discharging port 14 is shielded to prevent hot gas from flowing out, and on the other hand, the dried mixture can be discharged. After the dried mixture falls from the discharging port 14 of the box 1 to the discharging hopper 6, the mixture is unloaded as the lower partition plates 63 rotate.

[0041] The embodiment 3: the front and rear inner walls of the box 1 are symmetrically provided with two chute 16; the front and rear chute 16 are sealingly connected with two U-shaped plates 7 in sliding connection along the left and right directions; the box 1 is provided with a square cabinet 17 protruding forward; the cabinet 17 is internally and slidingly connected with two inner motors 31; the upper roller 2 is movably connected to the inner side of the U-shaped plate 7 at an upper position; the lower roller 3 is rotatably connected to the inner side of the U-shaped plate 7 at a lower position; the two U-shaped plates 7 are threadedly and drivingly connected with a screw rod 71 in penetrating the screw rod 71; the screw rod 71 is rotatably and sealingly connected with the box 1; the screw rod 71 is oppositely provided with threads at two ends; and the screw rod 71 is driven by an outer motor 72.

[0042] The outer wall of the outer motor 72 is fixedly connected with the outer wall of the box body 1 in this embodiment. The outer motor 72 drives the screw rod 71 to rotate in the rotating process. The threads of the two ends of the screw rod 71 are oppositely arranged. The screw rod 71 is in threaded transmission connection with the U-shaped plate 7. In this way, the rotation of the screw rod 71 can realize the mutual approaching or moving away of the two U-shaped plates 7 along the sliding groove 16. The driving mode of the mutual moving away or approaching of the two U-shaped plates 7 can also be realized by directly pushing structures such as electric push rods (not shown in the figure). Specifically, one end of the electric push rod is fixedly connected with the inner wall of the box body 1, and the other end is fixedly connected with the U-shaped plate 7. In this way, the distance between the two U-shaped plates 7 can be adjusted. The upper position of the inner side of the U-shaped plate 7 is movably connected with the upper roller 2. The lower position of the inner side of the U-shaped plate 7 is rotatably connected with the lower roller 3. In order to avoid the slippage of the lower roller 3 and the mesh belt 21, a chain wheel (not shown in the figure) can be arranged at the end of the lower roller 3. The edge of the mesh belt 21 is provided with an annular chain (not shown in the figure) engaged with the chain wheel, or other anti-skid measures are adopted to ensure the stable transmission of the mesh belt 21. The size of the gap between the two mesh belts 21 directly affects the discharge specification of the mixed material, so as to meet the production needs of different feed additives.

[0043] In embodiment 4, an arc-shaped groove 73 is arranged through the upper position of the inner side of the U-shaped plate 7 in front and back. The arc center of the arc-shaped groove 73 corresponds to the center axis of the lower roller 3. The end of the upper roller 2 is movably connected in the arc-shaped groove 73. A stop block 74 is movably connected in the arc-shaped groove 73. The stop block 74 and the inner wall of the arc-shaped groove 73 are connected through a first spring 75. The stop block 74 is abutted on the outer wall of the end of the upper roller 2 through the first spring 75.

[0044] The abutting block 74 is movably connected in the arc-shaped groove 73 in the embodiment, and is always abutted against the outer wall of the end of the upper roller 2 under the elastic force of the first spring 75. In this way, the two upper rollers 2 can be close to each other under the pushing of the respective abutting blocks 74. Since the arc center of the arc-shaped groove 73 is adapted to the center of the lower roller 3, the upper end of the mesh belt 21 can move along with the movement of the upper roller 2 along the arc-shaped groove 73. In this way, the upper ends of the two mesh belts 21 can be close to each other under the pushing of the first spring 75. Since the amount of wet slag entering along the upper end of the drying gap is not fixed, in the case of less wet slag drying amount, the first spring 75 will push the upper ends of the two mesh belts 21 to be close to each other, so that the drying gap between the two mesh belts 21 becomes smaller, so as to adapt to the case of less wet slag entering the drying gap. In the case of more wet slag drying amount, that is, in the case of more mixture of wet slag and thick pulp entering the drying gap, the drying surface 22 of the two mesh belts 21 will be pressed to drive the upper ends of the two mesh belts 21 to be away from each other, and the two upper rollers 2 will be away from each other and move along the respective arc-shaped grooves 73. The upper roller 2 can move in the arc-shaped groove 73 to overcome the movement of the abutting block 74. In this way, by setting the upper end of the mesh belt 21 to be movable and cooperating with the elastic force of the first spring 75, the upper end of the drying gap can change with the change of the amount of drying material, so as to ensure the rubbing effect of the mixture and meet different drying amounts.

[0045] Embodiment 5: A plurality of groups of material breaking blocks 23 are arranged on the outer wall of the mesh belt 21 along the transmission direction; each group of material breaking blocks 23 on the two mesh belts 21 is arranged in a staggered manner in the front-rear direction.

[0046] In the embodiment, the position of each group of material breaking blocks 23 on one of the drying surfaces 22 in the vertical direction is gradually changed; the height positions of the adjacent two groups of material breaking blocks 23 on the drying surface 22 gradually change in opposite directions.

[0047] The outer wall of the mesh belt 21 is fixedly connected with the breaking blocks 23, so that the breaking blocks 23 can move with the mesh belt 21 in the transmission direction, and the breaking blocks 23 on one drying surface 22 move upward, and the breaking blocks 23 on the other drying surface 22 move downward. The breaking blocks 23 can break the mixture material spread in the drying gap, and the broken mixture material is more conducive to the left and right passage of hot air through the drying gap, ensuring the smoothness of the airflow in the drying gap, and the broken mixture material also improves the drying effect of the mixture material. The breaking blocks 23 on the two mesh belts 21 are staggered in the front-rear direction, so that the breaking blocks 23 on the two mesh belts 21 do not interfere with each other during opposite direction transmission. In addition, the mesh belt 21 on the left position is counterclockwise transmission, and the mesh belt 21 on the left position drives the corresponding breaking blocks 23 to move out from the upper end of the drying gap. The height position of each group of breaking blocks 23 on the left position mesh belt 21 is gradually changed, and the height gradual change direction of each group of breaking blocks 23 on the left position mesh belt 21 is opposite. In this way, each group of breaking blocks 23 on the left position mesh belt 21 will push the wet residue and thick slurry entering the drying gap during the movement out of the upper end of the drying gap. For the case that the breaking blocks 23 in the front direction are higher than the breaking blocks 23 in the rear direction, the wet residue and thick slurry will be pushed in the rear direction. For the case that the breaking blocks 23 in the front direction are lower than the breaking blocks 23 in the rear direction, the wet residue and thick slurry will be pushed in the front direction. In this way, the wet residue and thick slurry are uniformly distributed in the front-rear direction before entering the drying gap, and the mixture material is more dispersed in the front-rear direction, thereby improving the drying uniformity and drying effect.

[0048] In example 6, the top rod 8 is fixedly connected to the inside top of the box 1. The outer wall of the top rod 8 is rotatably connected to the guide plate 82 through a torsion spring 81. The lower end of the guide plate 82 extends to the upper end of the drying gap.

[0049] In this embodiment, the guide plate 82 is composed of a plurality of mutually movable contact distribution plates 821. The distribution plate 821 is rotatably connected to the top rod 8 through an independent torsion spring 81.

[0050] The two guide plates 82 are in inverted V shape, which can guide the wet slag entering the feeding port 13 and the thick slurry discharged from the slurry pipe 4, so that the thick slurry and the wet slag can be smoothly introduced into the drying gap. The guide plates 82 can also shield the hot air passing from left to right, so that the hot air can pass through the mesh belt 21 as much as possible. Since the guide plates 82 are rotationally connected to the top rod 8 by the torsion spring 81, the lower end of the guide plate 82 can change with the movement of the upper end of the mesh belt 21, so as to meet the drying gap with different openings. In addition, since the guide plate 82 is composed of a plurality of sub-plates 821 which are in contact with each other, the sub-plates 821 can independently contact the outer wall of the mesh belt 21 and the broken material block 23, so as to limit the material on the outer surface of the mesh belt 21 in the drying gap as much as possible. The material on the outer wall of the mesh belt 21 and the broken material block 23 can be pushed down by the sub-plates 821.

[0051] In embodiment 7, a bottom groove 76 is arranged at the lower position of the inner side of the U-shaped plate 7. The bottom groove 76 is in strip shape, and the length direction of the bottom groove 76 is the front-back direction. A plurality of bottom blocks 77 are slidably connected in the bottom groove 76. The bottom blocks 77 are connected to the groove bottom of the bottom groove 76 by second springs 78. Adjacent two bottom blocks 77 are in contact.

[0052] The elastic force of the second spring 78 of the bottom block 77 pushes the lower bottom against the outer wall of the mesh belt 21. The upper end of the bottom block 77 is arc-shaped, so that in the process of the upper end of the bottom block 77 contacting the broken material block 23, the upper end of the bottom block 77 is pressed to overcome the second spring 78 and move downward, and after the upper end of the bottom block 77 passes the broken material block 23, the upper end of the bottom block 77 is again abutted against the outer wall of the mesh belt 21. In this way, the material on the outer wall of the mesh belt 21 can be scraped away by the bottom block 77, realizing the cleaning of the material on the outer wall of the mesh belt 21, and making the material in the drying gap fall off smoothly.

[0053] In embodiment 8, a processing technology for producing high-protein feed additives by using kitchen waste as raw material is provided. The processing technology is suitable for the processing equipment for producing high-protein feed additives by using kitchen waste as raw material. The steps of the processing technology are as follows.

[0054] S1, impurity removal and slurry preparation of kitchen waste: the kitchen waste is subjected to impurity removal to obtain slurry;

[0055] S2, enzymolysis and sterilization: the slurry in S1 is subjected to enzymolysis and heat sterilization to form high-temperature slurry;

[0056] S3, three-phase separation for oil extraction: the high-temperature slurry in S2 is introduced into a three-phase centrifuge for oil-water-sludge separation;

[0057] S4, drying of wet residue and evaporation of centrifugal clear liquid: the wet residue after three-phase separation in S3 is dried by using drying equipment, and the centrifugal clear liquid separated by the three-phase separator is concentrated by multi-effect evaporation using the secondary steam generated by the drying equipment as heat source, and the concentrated slurry is dried together with the wet residue to produce high-protein feed additive;

[0058] S5, anaerobic and aerobic treatment of waste water: the condensed waste water after multi-effect evaporation in S4 is discharged after anaerobic and aerobic treatment.

[0059] The impurities in the kitchen waste are removed to obtain high-purity enzymatic raw material slurry. After the kitchen waste is removed, the slurry is prepared, enzymatically hydrolyzed and sterilized by heating to obtain a slurry rich in starch, fat, protein, cellulose and other substances. The present process utilizes biological enzyme preparation to enzymatically hydrolyze starch, fat, protein and cellulose, and then sterilizes by high temperature to denature the above organic matters to the maximum extent, which is beneficial to the extraction of oil and fat and the obtaining of high-quality protein. The heating sterilization temperature is usually above 85℃, and the holding time is more than 10 hours. The viscosity of the slurry prepared after pulping and impurity removal is very high, and contains a large amount of starch, protein, oil, cellulose and other substances, and contains a large amount of bacteria. After enzymatic hydrolysis and heating sterilization, high-temperature slurry is prepared, which greatly reduces the viscosity of the material and creates good separation conditions for oil-water residue three-phase centrifugal separation. In the three-phase separation of oil, the viscosity of the slurry after enzymatic hydrolysis and sterilization is greatly reduced, and the oil-water residue is easily and effectively separated by the three-phase centrifugal machine, the oil extraction rate is greatly improved, and the oil content in water is usually not higher than 3000PPm.

[0060] The wet residue after three-phase separation contains a large amount of organic nutrients such as protein, and direct discharge causes great resource waste and serious environmental pollution. The wet residue is dried by direct heating with primary steam, and the centrifugal clear liquid is concentrated by multi-effect evaporation using secondary steam generated by the drying equipment as a heat source. The concentrated slurry with a solid content of about 30% is dried together with the wet residue, and finally a high-protein feed additive with a protein content of more than 30-35% is obtained. The COD value of the multi-effect evaporation wastewater is usually about 10000 mg / L, which can be discharged after simple anaerobic and aerobic treatment. The use of multi-effect evaporation and drying technology to process the centrifugal clear liquid of kitchen waste provides a more environmentally friendly wastewater solution while obtaining a high-protein feed additive product. The wet residue obtained after centrifugal separation has a protein content of more than 30% in dry state, which is an excellent breeding feed additive. The wet residue is dried, and the secondary steam generated by drying is used for multi-effect evaporation of the centrifugal clear liquid. The concentrated slurry of multi-effect evaporation is dried in the dryer to make feed additives. The COD value of the condensed water after multi-effect evaporation is less than 10000 mg / L, and the salt content, total nitrogen, total phosphorus, ammonia nitrogen and SS all meet the B-level standard in Table 1 of "Integrated Wastewater Discharge Standard" (GB8978-1996) and "Wastewater Discharge into Urban Sewer Water Quality Standard" (GB / T 31962-2015). This wastewater can meet the requirements of urban sewer discharge standards after simple anaerobic and aerobic treatment.

[0061] The kitchen waste impurity removal and pulping process uses pulping technology to separate and pulp the kitchen waste, which can effectively remove heavy impurities and inorganic impurities. Organic matter enters the production system as slurry. The kitchen waste slurry contains a large amount of starch, fat, protein, cellulose and other substances, as well as a large amount of bacteria. Fully extracting and recycling these organic matters makes them resourceful, which is one of the main purposes of kitchen waste treatment. This process uses biological enzyme preparations to enzymatically hydrolyze starch, fat, protein and cellulose, and then sterilizes them at high temperature to maximize the denaturation of the above organic matter, which is beneficial to the extraction of oil and the production of high-quality protein.

[0062] Kitchen waste contains a large amount of starch and other enzymatically hydrolyzable sugars, fats, proteins, cellulose, etc. Biotechnology is used to convert starch into enzymatically hydrolyzable sugars and cellulose into enzymatically hydrolyzable sugars, effectively reducing the viscosity of kitchen waste slurry. After three-phase centrifugation, the crude oil extraction rate is significantly improved. The wet residue from three-phase centrifugation is dried to obtain a high-protein feed additive. The concentrated slurry after multi-effect evaporation of the three-phase centrifugation liquid is mixed with the wet residue and dried. The secondary steam of the dryer is used as the heat source for multi-effect evaporation, and the insufficient part is supplemented by primary steam. The condensate after multi-effect evaporation has a COD value of only about 10,000 mg / L, and other pollutant indicators basically meet the urban sewage discharge standards. This part of the sewage can be discharged in compliance with standards after simple anaerobic and aerobic treatment.

[0063] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A processing device for producing high-protein feed additives from kitchen waste, comprising a drying device; characterized in that: The drying equipment includes a box body with drying holes equipped with filters running through its left and right sides; the upper and lower ends of the box body are respectively provided with a feed inlet and a discharge outlet; the box body is supported by a bracket; two upper rollers are rotatably connected to the upper part of the inner side of the box body; two lower rollers are rotatably connected to the lower part of the inner side of the box body; a mesh belt is driven to the outer side of each upper roller and lower roller; the width of the mesh belt is adapted to the front-to-back distance of the inner side of the box body; the lower rollers are driven by an internal motor; the two mesh belts drive in opposite directions and at different speeds; the side of the two mesh belts close to each other is the drying surface; the drying surface driven from top to bottom... The transmission speed is greater than that of the drying surface driven from bottom to top; hot air can pass through the two mesh belts along the drying holes; the slurry pipe passes through the upper part of the box; the slurry pipe is provided with a slurry discharge hole aligned with the space between the two drying surfaces; the space between the two drying surfaces is called the drying gap, wet slag enters the inner side of the box along the feed inlet and falls into the upper part of the drying gap, and the thick slurry is discharged along the slurry discharge hole on the slurry pipe; the two drying surfaces of the mesh belts are permeable to air, but not to thick slurry or wet slag; the two mesh belts with different speeds rub the mixture in the drying gap, so that the wet slag can be mixed with the thick slurry and spread out to dry at the same time.

2. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 1, characterized in that: The feed inlet of the box is fixedly connected to the feed hopper facing upwards; the cylindrical area in the middle of the feed hopper is rotatably connected to an upper partition rod driven by an upper motor; the outer wall of the upper partition rod is fixedly connected to multiple upper partition plates that are in movable and sealed contact with the inner wall of the feed hopper; the discharge outlet of the box is fixedly connected to the discharge hopper facing downwards; the cylindrical area in the middle of the discharge hopper is rotatably connected to a lower partition rod driven by a lower motor; the outer wall of the lower partition rod is fixedly connected to multiple lower partition plates that are in movable and sealed contact with the inner wall of the discharge hopper.

3. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 1, characterized in that: The front and rear inner walls of the housing are symmetrically provided with sliding grooves; the front and rear sliding grooves are slidably and sealingly connected to two U-shaped plates along the left and right directions; a square housing protrudes forward from the housing; two internal motors are slidably connected to the housing from left to right; the upper roller is movably connected to the upper part of the inner side of the U-shaped plate; the lower roller is rotatably connected to the lower part of the inner side of the U-shaped plate; the two U-shaped plates pass through each other from left to right and are threadedly connected to a screw; the screw is rotatably and sealingly connected to the housing; the threads at both ends of the screw are arranged in opposite directions; the screw is driven by an external motor.

4. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 3, characterized in that: An arc-shaped groove is provided through the upper inner side of the U-shaped plate; the center of the arc-shaped groove corresponds to the central axis of the lower roller; the end of the upper roller is movably connected in the arc-shaped groove; a stop block is movably connected in the arc-shaped groove; the stop block is connected to the inner wall of the arc-shaped groove by a first spring; the stop block abuts against the outer wall of the end of the upper roller by the first spring.

5. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 4, characterized in that: The outer wall of the mesh belt is provided with multiple sets of crushing blocks along the transmission direction; each set of crushing blocks on the two mesh belts is staggered in the front-to-back direction.

6. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 5, characterized in that: The vertical position of each group of crushed blocks on one of the drying surfaces is gradually changing; the height of adjacent groups of crushed blocks on the drying surface changes in opposite directions.

7. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 5, characterized in that: A top rod is fixedly connected to the top of the inner side of the chamber; the outer wall of the top rod is rotatably connected to a guide plate via a torsion spring; the lower end of the guide plate extends to the upper end of the drying gap.

8. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 7, characterized in that: The guide plate is composed of multiple material distribution plates that are in contact with each other; the material distribution plates are rotatably connected to the top rod by independent torsion springs.

9. The processing equipment for producing high-protein feed additives from kitchen waste as raw material according to claim 5, characterized in that: A bottom groove is provided on the lower inner side of the U-shaped plate; the bottom groove is elongated and its length direction is the front-to-back direction; multiple bottom blocks are slidably connected in the bottom groove; the bottom blocks are connected to the bottom of the bottom groove by a second spring; adjacent bottom blocks are in contact.

10. A processing technology for producing high-protein feed additives from kitchen waste, the process being applicable to the processing equipment for producing high-protein feed additives from kitchen waste as described in any one of claims 1-9, characterized in that: The steps of this process are as follows: S1, Removal and pulping of kitchen waste: The waste contained in kitchen waste is removed to obtain pulp; S2, Enzymatic hydrolysis and sterilization: The slurry in S1 is enzymatically hydrolyzed and sterilized by heating to form a high-temperature slurry; S3, Three-phase separation and oil extraction: The high-temperature slurry in S2 is introduced into a three-phase centrifuge for oil-water-sludge separation; S4, Wet residue drying and centrifugal clear liquid evaporation: The wet residue after three-phase separation in S3 is dried using a drying equipment. The centrifugal clear liquid separated by the three-phase separator is heated by the secondary steam generated by the drying equipment and subjected to multi-effect evaporation. The concentrated slurry obtained after concentration is then dried together with the wet residue to produce a high-protein feed additive. S5, Anaerobic and Aerobic Treatment of Wastewater: The condensate wastewater after multi-effect evaporation in S4 is discharged after anaerobic and aerobic treatment.

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