Treatment equipment and process for producing high-protein feed additive by taking kitchen garbage as raw material

Abstract

The invention relates to the technical field of kitchen garbage treatment, in particular to treatment equipment and a process for producing a high-protein feed additive by taking kitchen garbage as a raw material. Comprising drying equipment; the drying equipment comprises a box body, and drying holes with filter screens are formed in the left side and the right side of the box body in a penetrating manner; the upper end face and the lower end face of the box body are provided with a feeding port and a discharging port respectively. The box body is supported by the bracket; two upper rollers are connected to the upper position of the inner side of the box body in a front-back rotating mode. Two lower rollers are connected to the lower position of the inner side of the box body in a front-back rotating mode. The outer sides of the single upper roller and the single lower roller are in transmission connection with a mesh belt; the width of the mesh belt is matched with the front-back distance of the inner side of the box body; mixed materials in the drying gap are rubbed through the two mesh belts with the differential speed, so that wet residues can be spread and dried while being mixed with thick slurry, mixing and drying are integrated, and the production efficiency and the production quality of feed additives are improved.

Description

Technical Field

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

[0002] Kitchen waste is generated by the catering industry, workplace canteens, and household consumption. With my country's urbanization, this waste has become the greatest threat to the environment. According to statistics, each person produces 0.2-0.25 kg of kitchen waste per day. A city with a population of one million generates 200-250 tons of kitchen waste daily, approximately 40% of which is restaurant waste. Due to its high moisture content and susceptibility to bacterial contamination and odor, kitchen waste, especially restaurant waste, presents a challenge to urban management. Currently implemented biochemical treatments such as composting are difficult to generate economic benefits due to their simple processes.

[0003] In the process of producing high-protein feed additives using kitchen waste as raw material, the mixing and drying of wet residue and concentrated slurry is a key step. The existing process has obvious defects in this link: the mixing of wet residue and concentrated slurry mostly relies on traditional mixing equipment or natural mixing during simple transportation. The wet residue is a solid granular material containing protein, and the concentrated slurry is a high-viscosity fluid. The two have a large difference in physical form. Static mixing or low-intensity stirring can easily cause the concentrated slurry to aggregate and clump, and cannot fully contact with the wet residue, resulting in uneven distribution of nutrients in local areas of the mixed materials. The agglomeration of wet residue also makes it difficult for the concentrated slurry to penetrate. After drying, the product is prone to being "dry on the outside and wet on the inside" or "locally lacking nutrients", affecting quality stability.

[0004] At the same time, mixing and drying need to be implemented in two independent steps. The mixing is first completed in the mixing equipment and then transferred to the drying equipment for processing. The steps are cumbersome and the moisture content of the material is prone to fluctuations during the connection process. The drying time needs to be extended to ensure that the final moisture content meets the standard, which increases heat energy consumption. The step-by-step operation leads to overlapping idle waiting time of the equipment, and a continuous production process cannot be formed, which reduces the overall processing efficiency and is difficult to adapt to the needs of large-scale treatment of kitchen waste. In addition, the wet residue is clumping, which makes it impossible for heat to penetrate effectively during drying. Higher temperature or longer time is required to remove internal moisture, which can easily cause overheating of the surface material and denaturation of protein, destroying the nutritional activity of the product. Summary of the Invention

[0005] In order to make up for the shortcomings of the existing technology, the present invention proposes a processing equipment and process for producing high-protein feed additives using kitchen waste as raw materials. The present invention uses two mesh belts with differential speeds to rub the mixed material in the drying gap, so that the wet residue can be mixed with the concentrated slurry and spread out to dry at the same time, thereby combining mixing and drying into one, thereby improving the production efficiency and quality of feed additives.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: the processing equipment for producing high-protein feed additives using kitchen waste as raw materials of the present invention comprises a drying equipment; the drying equipment comprises a box body and drying holes with filters provided on the left and right sides of the box body; the upper and lower end surfaces of the box body are respectively provided with a feed port and a discharge port; the box body is supported by a bracket; the upper inner side of the box body is connected to two upper rollers for forward and backward rotation; the lower inner side of the box body is connected to two lower rollers for forward and backward rotation; a single upper roller and a single lower roller are connected to a mesh belt for transmission on the outer side; the width of the mesh belt is adapted to the front-to-back distance of the inner side of the box body; the lower roller is driven by an internal motor; the two mesh belts have opposite transmission directions and different speeds; the side of the two mesh belts close to each other is a drying surface; the transmission speed of the drying surface transmitted from top to bottom is greater than that of the drying surface transmitted from bottom to top; hot air can pass through the two mesh belts left and right along the drying holes; the upper position of the box body passes through a pulp pipe front and back; the pulp pipe is provided with a pulp discharge hole aligned with the space between the two drying surfaces.

[0007] Preferably, the feed port of the box body is fixedly connected to the feed hopper upward; the middle cylindrical area of ​​the feed hopper is connected to the upper partition rod driven by the upper motor in a forward and backward rotation; the outer wall of the upper partition rod is fixedly connected to a plurality of upper partition plates that are in movable and sealed contact with the inner wall of the feed hopper; the discharge port of the box body is fixedly connected to the discharge hopper downward; the middle cylindrical area of ​​the discharge hopper is connected to the lower partition rod driven by the lower motor in a forward and backward rotation; the outer wall of the lower partition rod is fixedly connected to a plurality of lower partition plates that are in movable and sealed contact with the inner wall of the discharge hopper.

[0008] Preferably, the front and rear inner walls of the box are symmetrically provided with slide grooves; the front and rear slide grooves are slidingly and sealingly connected to the two U-shaped plates along the left and right directions; the box is provided with a square casing protruding forward; the inside of the casing is slidingly connected to two internal motors left and right; the upper roller is movably connected to the upper position of the inner side of the U-shaped plate; the lower roller is rotatably connected to the lower position of the inner side of the U-shaped plate; the two U-shaped plates pass through the left and right and are threadedly connected to the screw; the screw is rotatably and sealedly connected to the box; the threads at both ends of the screw are arranged in opposite directions; the screw is driven by an external motor.

[0009] Preferably, an arc-shaped groove is provided through the front and back of the upper inner side of 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 is connected to the inner wall of the arc-shaped groove by a first spring; the stop block is pressed against the outer wall of the end of the upper roller by the first spring.

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

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

[0012] Preferably, the top position of the inner side of the box body is fixedly connected to a push rod; the outer wall of the push rod is rotatably connected to a material guide plate through a torsion spring; the lower end of the material guide plate extends to the upper end of the drying gap.

[0013] Preferably, the material guide plate is composed of a plurality of material dividing plates that are in movable contact with each other; the material dividing plates are rotatably connected to the ejector rod via independent torsion springs.

[0014] Preferably, a bottom groove is provided at the lower inner side of the U-shaped plate; the bottom groove is long and the length direction of the bottom groove is the front-to-back direction; a plurality of bottom blocks are slidably connected in the bottom groove; the bottom block is connected to the bottom of the bottom groove through a second spring; and two adjacent bottom blocks are in movable contact.

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

[0016] S1, impurity removal and pulping of kitchen waste: garbage contained in kitchen waste is removed to obtain pulp;

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

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

[0019] S4, Drying of Wet Residue and Evaporation of Centrifugal Supernatant: The wet residue after the three-phase separation in S3 is dried using a drying device, and the centrifugal supernatant separated by the three-phase separator is subjected to multi-effect evaporation using the secondary steam generated by the drying device as a heat source. The concentrated slurry obtained after concentration is then dried together with the wet residue to produce a high-protein feed additive;

[0020] S5, anaerobic and aerobic wastewater treatment: the condensed wastewater after the multi-effect evaporation in S4 is discharged after anaerobic and aerobic treatment.

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

[0022] 1. The present invention uses two mesh belts with differential speeds to rub the mixed material in the drying gap, so that the wet residue can be mixed with the concentrated slurry and spread out for drying at the same time, thereby integrating mixing and drying into one, thereby improving the production efficiency and quality of feed additives.

[0023] 2. The rotation of the external motor of the present invention will drive the screw to rotate. The threads at both ends of the screw are arranged in opposite directions. The screw is connected to the U-shaped plate thread transmission. In this way, the rotation of the screw can realize the two U-shaped plates approaching or moving away from each other along the chute. The size of the gap between the two mesh belts directly affects the discharge specifications of the mixed material, thereby meeting different feed additive production needs.

[0024] 3. The present invention sets the upper end of the mesh belt to be movable and cooperates with the elastic force of the first spring so that the upper end of the drying gap can change with the amount of drying material, thereby ensuring the kneading effect of the mixed material while meeting different drying amounts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 It is a three-dimensional diagram of the drying equipment of the present invention;

[0027] Figure 2 is a cross-sectional view of the present invention;

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 yes Figure 2 Enlarged view of point B in the middle;

[0030] Figure 5 It is a three-dimensional diagram of the U-shaped plate and the mesh belt in the present invention;

[0031] Figure 6 yes Figure 5 A three-dimensional image from another angle;

[0032] Figure 7 It is a process flow chart of the present invention.

[0033] In the figure: box 1, drying hole 11, filter 12, feed port 13, discharge port 14, bracket 15, chute 16, casing 17, upper roller 2, mesh belt 21, drying surface 22, broken material block 23, lower roller 3, inner motor 31, pulp pipe 4, pulp discharge hole 41, feed hopper 5, upper partition rod 51, upper motor 52, upper partition plate 53, discharge hopper 6, lower partition rod 61, lower motor 62, lower partition plate 63, U-shaped plate 7, screw 71, outer motor 72, arc groove 73, stop block 74, first spring 75, bottom groove 76, bottom block 77, second spring 78, top rod 8, torsion spring 81, guide plate 82, and dividing plate 821. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0035] like Figures 1 to 7 As shown, the present invention includes the following embodiments:

[0036] Example 1: A processing device for producing high-protein feed additives using kitchen waste as raw materials, including a drying device; the drying device includes a box body 1 and drying holes 11 with filter screens 12 provided on the left and right sides of the box body 1; the upper and lower end surfaces of the box body 1 are respectively provided with a feed inlet 13 and a discharge outlet 14; the box body 1 is supported by a bracket 15; the upper position of the inner side of the box body 1 is connected to two upper rollers 2 for forward and backward rotation; the lower position of the inner side of the box body 1 is connected to two lower rollers 3 for forward and backward rotation; the outer sides of the single upper roller 2 and the single lower roller 3 are connected to the filter screen Belt 21; the width of the mesh belt 21 is adapted to the front-to-back distance inside the box body 1; the lower roller 3 is driven by an internal motor 31; the two mesh belts 21 have opposite transmission directions and different speeds; the side of the two mesh belts 21 close to each other is a drying surface 22; the transmission speed of the drying surface 22 transmitted from top to bottom is greater than that of the drying surface 22 transmitted from bottom to top; hot air can pass through the two mesh belts 21 left and right along the drying hole 11; the box body 1 passes through the pulp pipe 4 front and back at the upper position; the pulp pipe 4 is provided with a pulp discharge hole 41 aligned with the space between the two drying surfaces 22.

[0037] The drying hole 11 on the right side of the box body 1 is connected to the air inlet pipe (not shown in the figure), and the drying hole 11 on the left side of the box body 1 is connected to the air outlet pipe (not shown in the figure). After being heated, the gas enters the inner side of the box body 1 along the air inlet pipe and the drying hole 11 on the right side. The hot air inside the box body 1 will pass through the two mesh belts 21 from right to left and be discharged along the drying hole 11 on the left side and the air outlet pipe. For the convenience of explanation, the space between the two drying surfaces 22 is called the drying gap. The wet slag enters the inner side of the box body 1 along the feed port 13 and falls into the upper position of the drying gap. The pump body of the sludge pump (not shown in the figure) will push the thick slurry along the slurry discharge hole 41 on the slurry pipe 4. The thick slurry contains a large amount of effective substances, and the thick slurry will fall evenly on the wet slag at the upper position of the drying gap. The two internal motors 31 will drive the corresponding lower rollers 3 to rotate. The two lower rollers 3 rotate in opposite directions. From the front side perspective, the mesh belt 21 at the left position will drive counterclockwise, and the mesh belt 21 at the right position will drive clockwise. The transmission speed of the mesh belt 21 at the left position is smaller than that of the mesh belt 21 at the right position. The drying surface 22 on the mesh belt 21 at the left position rubs the wet slag in the drying gap upwards, and the drying surface 22 on the mesh belt 21 at the right position rubs the wet slag in the drying gap downwards, so that the wet slag in the drying gap is rubbed on the two drying surfaces 22. The wet residue after being spread out can fully contact and mix with the thick slurry dripped into the drying gap. In the process of the wet residue and the thick slurry in the drying gap being mixed and rubbed, the hot air will pass through the mesh belt 21 from right to left. The two drying surfaces 22 of the mesh belt 21 are breathable, but cannot pass through the thick slurry and the wet residue. Therefore, the thick slurry and the wet residue are confined in the drying gap and spread out. After the hot air passes through the mixture of the spread wet residue and the thick slurry, the moisture in the mixture will be vaporized by the heat, and the water vapor will flow away with the hot air to achieve the drying of the mixture. Since the transmission speed of the mesh belt 21 at the right position is greater than that of the mesh belt 21 at the left position, the drying surface 22 at the right position The speed of the downward transmission is greater than the upward transmission speed of the drying surface 22 on the left side. Therefore, the mixed material in the drying gap is rubbed and moved downward, and the moisture content of the mixed material will gradually decrease. While maintaining the speed difference between the two mesh belts 21, the speed of the two mesh belts 21 is increased at the same time, which can extend the drying time of the mixed material. Compared with the existing long-volume drying equipment, this greatly saves the equipment space. After drying, the mixed material will be moved out from the lower end of the drying gap and finally discharged along the discharge port 14 to form a feed additive. The wet residue will continuously fall into the upper end of the drying gap, and the thick slurry will flow out from the outer wall of the slurry pipe 4 as the wet residue enters.

[0038] The present invention uses two mesh belts 21 with differential speed to rub the mixed material in the drying gap, so that the wet residue can be mixed with the concentrated slurry and spread out for drying at the same time, thereby integrating mixing and drying into one, thereby improving the production efficiency and production quality of feed additives.

[0039] Example 2: The feed port 13 of the box body 1 is fixedly connected to the feed hopper 5 upward; the middle cylindrical area of ​​the feed hopper 5 is connected to the upper partition rod 51 driven by the upper motor 52 for rotation back and forth; the outer wall of the upper partition rod 51 is fixedly connected to multiple upper partition plates 53 that are in movable and sealed contact with the inner wall of the feed hopper 5; the discharge port 14 of the box body 1 is fixedly connected to the discharge hopper 6 downward; the middle cylindrical area of ​​the discharge hopper 6 is connected to the lower partition rod 61 driven by the lower motor 62 for rotation back and forth; the outer wall of the lower partition rod 61 is fixedly connected to multiple lower partition plates 63 that are in movable and sealed contact with the inner wall of the discharge hopper 6.

[0040] The outer wall of the upper motor 52 in this embodiment is fixedly connected to the outer wall of the front side of the feed hopper 5, and the outer wall of the lower motor 62 is fixedly connected to the outer wall of the front side of the discharge hopper 6. The upper motor 52 will drive the upper partition rod 51 to rotate. During the rotation of the upper partition rod 51, the multiple upper partition plates 53 of the outer wall will be driven to rotate. During the rotation of the upper partition plates 53, on the one hand, the feed port 13 of the box body 1 can be blocked to prevent hot air from flowing out, and on the other hand, the feeding of wet slag can be realized. After the wet slag is poured into the upper port of the feed hopper 5, the wet slag will fall on the upper partition plate 53. As the upper partition plate 53 rotates, The wet slag will move from the upper part to the lower part of the feed hopper 5, and the wet slag will enter the drying gap along the feed port 13 of the box body 1; the lower motor 62 will drive the lower partition rod 61 to rotate, and the rotation of the lower partition rod 61 will drive the multiple lower partition plates 63 on the outer wall to rotate. During the rotation of the lower partition plate 63, on the one hand, the discharge port 14 can be blocked to prevent hot air from flowing out, and on the other hand, the dried mixed material can be discharged. After the dried mixed material falls from the discharge port 14 of the box body 1 to the discharge hopper 6, the mixed material will be discharged as the lower partition plate 63 rotates.

[0041] Example 3: The front and rear inner walls of the box body 1 are symmetrically provided with sliding grooves 16; the front and rear sliding grooves 16 are slidingly and sealedly connected to the two U-shaped plates 7 along the left and right directions; the box body 1 is provided with a square casing 17 protruding forward; the inside of the casing 17 is slidingly connected to two internal motors 31 left and right; the upper roller 2 is movably connected to the upper position of the inner side of the U-shaped plate 7; the lower roller 3 is rotatably connected to the lower position of the inner side of the U-shaped plate 7; the two U-shaped plates 7 pass through the left and right and are threadedly connected to the screw 71; the screw 71 is rotatably and sealedly connected to the box body 1; the threads at both ends of the screw 71 are arranged in opposite directions; the screw 71 is driven by an external motor 72.

[0042] The outer wall of the outer motor 72 of the present embodiment is fixedly connected to the outer wall of the box body 1. The outer motor 72 drives the screw 71 to rotate during the rotation of the outer motor 72. The threads at both ends of the screw 71 are arranged in opposite directions. The screw 71 is threadedly connected to the U-shaped plate 7. In this way, the rotation of the screw 71 can realize the two U-shaped plates 7 to move closer to or away from each other along the slide groove 16. The driving mode of the two U-shaped plates 7 to move away from or closer to each other can also be realized by a direct pushing structure such as an electric push rod (not shown in the figure). Specifically, one end of the electric push rod is fixedly connected to the inner wall of the box body 1, and the other end is fixedly connected to the U-shaped plate 7. In this way, The distance between the two U-shaped plates 7 is adjustable. The upper inner side of the U-shaped plate 7 is movably connected to the upper roller 2, and the lower inner side of the U-shaped plate 7 is rotatably connected to the lower roller 3. In order to prevent the lower roller 3 from slipping with the mesh belt 21, a sprocket (not shown in the figure) can be provided at the end of the lower roller 3, and an annular chain (not shown in the figure) engaged with the sprocket can be provided at the edge of the mesh belt 21, or other anti-slip measures can be adopted to ensure stable transmission of the mesh belt 21. The size of the gap between the two mesh belts 21 directly affects the discharge specifications of the mixed material, thereby meeting different feed additive production requirements.

[0043] Example 4: An arc-shaped groove 73 is provided on the upper inner side of the U-shaped plate 7, which passes through the front and back parts. The arc center of the arc-shaped groove 73 corresponds to the central 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 is connected to the inner wall of the arc-shaped groove 73 by a first spring 75. The stop block 74 is pressed against the outer wall of the end of the upper roller 2 by the first spring 75.

[0044] The arc groove 73 in this embodiment is movably connected to the block 74, and the block 74 always presses against the outer wall of the end of the upper roller 2 under the elastic force of the first spring 75, so that the two upper rollers 2 can move closer to each other under the push of their respective blocks 74. Since the arc center of the arc groove 73 is adapted to the center of the lower roller 3, the upper end of the mesh belt 21 can move with the movement of the upper roller 2 along the arc groove 73, so that the upper ends of the two mesh belts 21 can be pushed closer to each other by the first spring 75. Since the amount of wet slag entering the upper end along the drying gap is not fixed, when the amount of wet slag drying is small, the first spring 75 will push the upper ends of the two mesh belts 21 closer to each other, thereby making the two mesh belts The drying gap between 21 becomes smaller to adapt to the situation where less wet slag enters the drying gap. In the case of a large amount of wet slag drying, that is, a large amount of mixed material of wet slag and thick slurry enters the drying gap, the drying surfaces 22 of the two mesh belts 21 are pressed to drive the two mesh belts 21 to move away from each other at the upper ends, and the two upper rollers 2 move away from each other and move along their respective arc grooves 73. The upper rollers 2 can overcome the resistance blocks 74 in the arc grooves 73 and move. In this way, by setting the upper end of the mesh belt 21 to be movable, combined with the elastic force of the first spring 75, the upper end of the drying gap can change with the amount of dried material, thereby ensuring the kneading effect of the mixed material while meeting different drying amounts.

[0045] Embodiment 5: A plurality of groups of crushing blocks 23 are provided on the outer wall of the mesh belt 21 along the transmission direction; each group of crushing blocks 23 on the two mesh belts 21 are staggered in the front-to-back direction.

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

[0047] The outer wall of the mesh belt 21 is fixedly connected to the material breaking blocks 23, so that the material breaking blocks 23 can move with the mesh belt 21 in the transmission direction, and the material breaking blocks 23 on one drying surface 22 move upward, and the material breaking blocks 23 on the other drying surface 22 move downward. The material breaking blocks 23 can break the mixed material spread out in the drying gap, and the broken mixed material can make it easier for hot air to pass through the drying gap left and right, ensuring the smooth flow of air in the drying gap. The broken mixed material also improves the drying effect of the mixed material. The material breaking blocks 23 on the two mesh belts 21 are staggered in the front and back directions, so that the material breaking blocks 23 on the two mesh belts 21 will not cause interference during the transmission process in opposite directions; in addition, the mesh belt 21 at the left position is driven counterclockwise, and the mesh belt 21 at the left position drives the corresponding material breaking block 23 to circulate and move out from the upper end of the drying gap, and the mesh belt 2 at the left position The height position of each group of broken blocks 23 on 1 is gradual, and the height gradient direction of each group of broken blocks 23 on the left mesh belt 21 is opposite, so that each group of broken blocks 23 on the left mesh belt 21 will stir the wet slag and thick slurry entering the drying gap during the process of moving out from the upper end of the drying gap. When the broken blocks 23 in the front direction are higher than the broken blocks 23 in the rear direction, the wet slag and thick slurry will be stirred toward the rear direction. When the broken blocks 23 in the front direction are lower than the broken blocks 23 in the rear direction, the wet slag and thick slurry will be stirred toward the front direction. In this way, the wet slag and thick slurry are evenly distributed in the front-to-back direction before entering the drying gap, thereby making the wet slag and thick slurry in the drying gap more evenly mixed, and the mixed material is more dispersed in the front-to-back direction, thereby improving the drying uniformity and drying effect.

[0048] Embodiment 6: The top position inside the box body 1 is fixedly connected to the top rod 8; the outer wall of the top rod 8 is rotatably connected to the guide plate 82 through the 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 material guide plate 82 is composed of a plurality of material dividing plates 821 that are in movable contact with each other; the material dividing plates 821 are rotatably connected to the ejector rod 8 via an independent torsion spring 81 .

[0050] The two guide plates 82 are in an inverted eight shape. The two guide plates 82 can guide the wet slag entering from the feed port 13 and the thick slurry discharged from the slurry pipe 4, so that the thick slurry and wet slag can be smoothly introduced into the drying gap. The guide plates 82 can also block the hot air passing through the left and right, so that the hot air can pass through the mesh belt 21 as much as possible; since the guide plates 82 are rotatably 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 gaps with different openings; in addition, since the guide plates 82 are composed of a plurality of dividing plates 821 that are in movable contact with each other, the dividing plates 821 can independently contact the outer wall of the mesh belt 21 and the breaking block 23, so as to limit the material on the outer surface of the mesh belt 21 to the drying gap as much as possible; the material on the outer wall of the mesh belt 21 and the breaking block 23 can be pushed down by the dividing plates 821.

[0051] Example 7: A bottom groove 76 is provided at the lower inner side of the U-shaped plate 7; the bottom groove 76 is long and the length direction of the bottom groove 76 is the front-to-back direction; a plurality of bottom blocks 77 are slidably connected in the bottom groove 76; the bottom blocks 77 are connected to the bottom of the bottom groove 76 via a second spring 78; two adjacent bottom blocks 77 are in movable contact.

[0052] The elastic force of the second spring 78 of the bottom block 77 pushes the bottom to the outer wall of the mesh belt 21. The upper end of the bottom block 77 is arc-shaped, so when the upper end of the bottom block 77 contacts the breaking block 23, it is under pressure to overcome the downward movement of the second spring 78, and after the upper end of the bottom block 77 passes over the breaking block 23, it rests on the outer wall of the mesh belt 21 again. In this way, the material on the outer wall of the mesh belt 21 can be scraped away by the bottom block 77, so that the material on the outer wall of the mesh belt 21 can be cleaned while the material in the drying gap can fall off smoothly.

[0053] Example 8: A process for producing a high-protein feed additive using kitchen waste as raw material. This process is applicable to the above-mentioned processing equipment for producing a high-protein feed additive using kitchen waste as raw material. The steps of this process are as follows:

[0054] S1, impurity removal and pulping of kitchen waste: garbage contained in kitchen waste is removed to obtain pulp;

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

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

[0057] S4, Drying of Wet Residue and Evaporation of Centrifugal Supernatant: The wet residue after the three-phase separation in S3 is dried using a drying device, and the centrifugal supernatant separated by the three-phase separator is subjected to multi-effect evaporation using the secondary steam generated by the drying device as a heat source. The concentrated slurry obtained after concentration is then dried together with the wet residue to produce a high-protein feed additive;

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

[0059] After removing impurities from kitchen waste, a high-purity enzymatically hydrolyzable raw material slurry is obtained. After the kitchen waste is decontaminated, it is made into a slurry. After enzymatic hydrolysis and heat sterilization, a slurry rich in starch, fat, protein, cellulose and other substances is obtained. This process technology 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 conducive to the extraction of oil and the acquisition of high-quality protein. The heating and sterilization temperature is usually above 85°C, and the holding time exceeds 10 hours. The slurry obtained after pulping and decontamination has a high viscosity and contains a large amount of starch, protein, oil, cellulose, etc., as well as a large amount of miscellaneous bacteria. After enzymatic hydrolysis and heat sterilization, a high-temperature slurry is obtained, which greatly reduces the viscosity of the material and creates good separation conditions for three-phase centrifugal separation of oil, water and residue. In the three-phase separation oil extraction, the viscosity of the slurry after enzymatic hydrolysis and sterilization is greatly reduced. The oil, water and residue are separated by a three-phase centrifuge, and the oil, water and residue are easily and effectively separated, the oil extraction rate is greatly improved, and the oil content in water is usually not higher than 3000PPm.

[0060] After three-phase separation, the wet residue contains a large amount of protein and other organic nutrients. Direct discharge will cause a huge waste of resources and cause serious pollution to the environment. The wet residue is dried by direct heating with primary steam. The centrifugal clear liquid uses the secondary steam generated by the drying equipment as a heat source, and the centrifugal clear liquid is subjected to multi-effect evaporation. The concentrated slurry with a solid content of about 30% is then dried together with the wet residue to finally produce a high-protein feed additive with a protein content of more than 30-35%; the COD value of the multi-effect evaporation wastewater is usually around 10,000 mg / L, and it can be discharged in compliance with the standards after simple anaerobic and aerobic treatment; the multi-effect evaporation and drying technology is used to treat the kitchen waste centrifugal clear liquid, and after obtaining the high-protein While producing white feed additives, it also provides a more environmentally friendly wastewater solution. The wet residue obtained after centrifugation has a protein content of over 30% in its dry state, making it an excellent livestock feed additive. This wet residue is dried to produce a high-protein feed additive. The secondary steam generated during drying is used to perform multi-effect evaporation on the centrifugal supernatant. The concentrated slurry from the multi-effect evaporation is then dried in a dryer to be used as a feed additive. The condensate after multi-effect evaporation has a COD value below 10,000 mg / L, and its salinity, total nitrogen, total phosphorus, ammonia nitrogen, and SS all meet the Class B standards in Table 1 of the Integrated Wastewater Discharge Standard (GB8978-1996) and the Water Quality Standard for Wastewater Discharge into Urban Sewers (GB / T 31962-2015). This wastewater can meet the requirements of urban sewerage drainage standards through simple anaerobic and aerobic treatment.

[0061] This kitchen waste impurity removal and pulping process adopts pulping technology to sort and pulp kitchen waste, which can effectively remove heavy impurities and inorganic impurities, and the organic matter enters the production system as pulp; the kitchen waste pulp contains a large amount of starch, fat, protein, cellulose and other substances, as well as a large amount of miscellaneous bacteria. One of the main purposes of kitchen waste treatment is to fully extract and recycle this part of organic matter and make it a resource. This process technology uses biological enzyme preparations to enzymatically hydrolyze starch, fat, protein and cellulose, and then sterilizes it at high temperature to maximize the denaturation of the above organic matter, which is conducive to the extraction of oil and obtain high-quality protein.

[0062] A large amount of starch and other enzymolyzable sugars, fats, proteins, cellulose, etc. in kitchen waste are converted into enzymolyzable sugars and cellulose into enzymolyzable sugars by biotechnology, which effectively reduces the viscosity of kitchen waste slurry and significantly improves the crude oil extraction rate after three-phase centrifugation. The wet residue of three-phase centrifugation is dried to obtain high-protein feed additives. The concentrated slurry after multi-effect evaporation of the three-phase centrifugal clear liquid is mixed with the wet residue for drying. The multi-effect evaporation preferentially uses the secondary steam of the dryer as the heat source, and the insufficient part is supplemented by primary steam. The COD value of the condensate after multi-effect evaporation is only about 10,000 mg / L, and other pollutant indicators basically meet the urban sewer sewage discharge standards. This part of sewage can be discharged in compliance with the standards after simple anaerobic and aerobic treatment.

[0063] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood 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 cannot be understood as indicating or implying relative importance.

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

Claims

1. A processing device for producing high-protein feed additives using kitchen waste as raw materials, including a drying device; characterized in that: The drying equipment includes a box body and drying holes with filters provided on the left and right sides of the box body; the upper and lower end faces of the box body are respectively provided with a feed port and a discharge port; the box body is supported by a bracket; the upper inner side of the box body is connected to two upper rollers for rotating back and forth; the lower inner side of the box body is connected to two lower rollers for rotating back and forth; a single upper roller and a single lower roller are connected to a mesh belt for transmission on the outer side; the mesh belt width is adapted to the front and rear distance of the inner side of the box body; the lower roller is driven by an internal motor; the two mesh belts have opposite transmission directions and different speeds; the sides of the two mesh belts that are close to each other are drying surfaces; the transmission speed of the drying surface transmitted from top to bottom is greater than that of the drying surface transmitted from bottom to top; hot air can pass through the two mesh belts left and right along the drying holes; the upper position of the box body passes through the pulp pipe front and back; the pulp pipe is provided with a pulp discharge hole aligned with the space between the two drying surfaces.

2. The processing equipment for producing high-protein feed additives using kitchen waste as raw materials according to claim 1, characterized in that: The feed port of the box body is fixedly connected to the feed hopper upward; the middle cylindrical area of ​​the feed hopper rotates back and forth and is connected to the upper partition rod driven by the 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 port of the box body is fixedly connected to the discharge hopper downward; the middle cylindrical area of ​​the discharge hopper is rotated back and forth and is connected to the lower partition rod driven by the 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 using kitchen waste as raw materials according to claim 1, characterized in that: The front and rear inner walls of the box are symmetrically provided with sliding grooves; the front and rear sliding grooves are slidingly and sealingly connected to the two U-shaped plates in the left and right directions; the box is provided with a square casing protruding forward; the inside of the casing is connected to two internal motors for sliding left and right; the upper roller is movably connected to the upper position of the inner side of the U-shaped plate; the lower roller is rotatably connected to the lower position of the inner side of the U-shaped plate; the two U-shaped plates pass through the left and right sides and are connected to the screw by thread transmission; the screw is rotatably and sealedly connected to the box; 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 using kitchen waste as raw materials according to claim 3, characterized in that: An arc-shaped groove is provided on the upper inner side of the U-shaped plate, passing through the front and back positions; 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 is connected to the inner wall of the arc-shaped groove by a first spring; the stop block is pressed 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 using kitchen waste as raw materials according to claim 4, characterized in that: The outer wall of the mesh belt is provided with a plurality of groups of breaking blocks along the transmission direction; and each group of breaking blocks on the two mesh belts is staggered in the front-to-back direction.

6. The processing equipment for producing high-protein feed additives using kitchen waste as raw materials according to claim 5, characterized in that: The vertical position of each group of broken blocks on one of the drying surfaces is gradually changed; the height positions of the broken blocks of two adjacent groups on the drying surface are gradually changed in opposite directions.

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

8. The processing equipment for producing high-protein feed additives using kitchen waste as raw materials according to claim 7, characterized in that: The material guide plate is composed of a plurality of material dividing plates that are in movably contact with each other; the material dividing plates are rotatably connected to the ejector rod via independent torsion springs.

9. The processing equipment for producing high-protein feed additives using kitchen waste as raw materials according to claim 5, characterized in that: A bottom groove is provided at the lower inner side of the U-shaped plate; the bottom groove is long and the length direction of the bottom groove is the front-back 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 through a second spring; two adjacent bottom blocks are in movable contact.

10. A process for producing a high-protein feed additive from kitchen waste, the process being applicable to the processing equipment for producing a high-protein feed additive from kitchen waste as a raw material according to any one of claims 1 to 9, characterized in that: The steps of the process are as follows: S1, impurity removal and pulping of kitchen waste: garbage contained in kitchen waste is removed to obtain pulp; S2, enzymatic hydrolysis and sterilization: the slurry in S1 is subjected to enzymatic hydrolysis and heat sterilization 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-slag separation; S4, Drying of Wet Residue and Evaporation of Centrifugal Supernatant: The wet residue after the three-phase separation in S3 is dried using a drying device, and the centrifugal supernatant separated by the three-phase separator is subjected to multi-effect evaporation using the secondary steam generated by the drying device as a heat source. 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 wastewater treatment: the condensed wastewater after the multi-effect evaporation in S4 is discharged after anaerobic and aerobic treatment.

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