A drying method and drying equipment for enzymatically emulsified feed

Abstract

The application discloses a kind of enzyme emulsification feed drying method and drying equipment, belong to feed drying field.The enzyme emulsification feed drying equipment of the application, including bottom plate, fixedly arranged on the bottom plate shell, vacuum generation component, mesh belt conveying component, cloth component, hot air drying component, shaking component and first receiving hopper, mesh belt conveying component includes multiple roller that is rotatably connected on the inner wall of shell and annular mesh belt that is surrounded between roller;Cloth component includes multiple cloth pipes that are spaced apart along the width direction of mesh belt, hot air drying component includes air outlet plate that is arranged below mesh belt conveying section, shaking component includes multiple shaking strips, and first receiving hopper is arranged below the end of mesh belt conveying section.The application realizes low-temperature efficient uniform dehydration by low-temperature vacuum drying and gravity turning over cooperation, and realizes continuous vacuum stable operation by return stroke shaking self-cleaning and intermittent airlock sealing discharge cooperation, to keep the premise of enzyme activity, complete high-quality continuous drying.

Description

Technical Field

[0001] This invention relates to the field of feed drying, and in particular to a drying method and equipment for enzymatically hydrolyzed emulsified feed. Background Technology

[0002] Drying enzymatically hydrolyzed emulsified feed (such as enzymatically hydrolyzed soybean meal, fermented whey powder, etc.) is a key process in feed processing. The core difficulty lies in the high heat sensitivity of the material (the activity of enzyme proteins decreases significantly when the temperature exceeds 70°C) and the high initial moisture content.

[0003] Currently, the closest existing technology in industry to this invention includes atmospheric pressure mesh belt hot air drying equipment. For example, Chinese patent CN118089373B discloses a feed drying box with uniform drying, which includes a box body, a hot air furnace, a conveying mechanism (roller mesh chain), and a shoveling mechanism (rectangular shell and shovel plate). By rotating the shovel plate, the feed on the roller mesh chain is shoveled up and turned over, so that the middle part of the feed is exposed to hot air. A cross-shaped circulation is formed in the box body by a circulating fan to improve the drying uniformity. This equipment improves the problem of uneven drying of materials to a certain extent.

[0004] The existing equipment described above uses normally open chutes or open discharge structures for its inlet and outlet. Due to these multiple openings, such equipment can maintain operation under normal pressure, but it is not convenient to establish or maintain a vacuum. This structural constraint makes it difficult for existing mesh belt drying equipment to be compatible with negative pressure drying processes. Furthermore, the heat-sensitive enzymes in enzymatically hydrolyzed emulsified feed are severely deactivated under normal pressure and high temperature (90℃~120℃) conditions, making it difficult to reduce the drying temperature to achieve effective dehydration while maintaining enzyme activity. Summary of the Invention

[0005] This invention provides a drying method and equipment for enzymatically hydrolyzed emulsified feed, which can solve the problem that the existing mesh belt hot air drying equipment is inconvenient to operate under vacuum and cannot meet the continuous drying requirements of enzymatically hydrolyzed emulsified feed under low temperature conditions.

[0006] A drying device for enzymatically hydrolyzed emulsified feed includes a base plate and a casing fixed to the base plate, and further includes: Vacuum generating assembly, used to evacuate the inside of the housing to a negative pressure state; The mesh belt conveyor assembly includes a plurality of rollers rotatably connected to the inner wall of the housing and an annular mesh belt surrounding the rollers; A fabric assembly is disposed on the top wall inside the housing and above the starting end of the conveyor belt section. The fabric assembly includes a plurality of fabric tubes spaced apart along the width of the conveyor belt. Hot air drying assembly, including an air outlet plate located below the mesh belt conveyor section; A rapping assembly is disposed inside the housing and above the return section of the conveyor belt. The rapping assembly includes multiple rapping bars, which periodically impact the return section of the conveyor belt when rotating. The first receiving hopper is located below the end of the conveyor belt section and is used to discharge the dried feed out of the machine casing.

[0007] Preferably, the plurality of rollers are divided into an upper roller group, a middle roller group, and a lower roller group. The upper roller group and the middle roller group form a first conveying section of the mesh belt, and the middle roller group and the lower roller group form a second conveying section of the mesh belt. A height difference is formed between the first conveying section and the second conveying section.

[0008] Preferably, the mesh belt includes two drive belts and a wire mesh fixed between the drive belts, with the two drive belts respectively disposed at the ends of the rollers.

[0009] Preferably, the hot air drying assembly further includes an air inlet main pipe and a plurality of air inlet branch pipes fixed on the side wall of the housing, wherein the air inlet branch pipes connect the air inlet main pipe and the air outlet plate.

[0010] Preferably, the fabric assembly further includes a screw feeder fixed to the top of the housing, wherein multiple material discharge ports are evenly opened at the bottom of the screw feeder along the axis, and the fabric tube is fixed at the material discharge ports.

[0011] Preferably, the vibratory assembly further includes a rotating shaft rotatably connected to the side wall of the housing and a first motor fixed to the outside of the housing. The rotating shaft is fixedly connected to the output shaft of the first motor, and the vibratory strips are provided in multiple quantities and evenly arranged along the axial direction of the rotating shaft.

[0012] Preferably, the vacuum generating assembly includes a vacuum pump, a condensate trap, and a dust filter. The condensate trap is connected to the inside of the housing via a negative pressure pipe. The dust filter is connected to the condensate trap via a delivery pipe. The dust filter is connected to the vacuum pump.

[0013] Preferably, a second receiving hopper is fixed inside the housing and below the first conveying section of the mesh belt. The second receiving hopper is located directly below the material distribution pipe. A second discharge pipe and a first discharge pipe are fixed to the bottom of the second receiving hopper and the first receiving hopper, respectively.

[0014] Preferably, a through groove is formed on the side of the housing near the starting end of the conveyor belt, and insert plates are symmetrically fixed on the outside of the housing and on one side of the through groove. Slots are formed on the opposite side of the insert plates, and a sealing plate is inserted into the slot.

[0015] A method for drying enzymatically hydrolyzed emulsified feed, using the aforementioned enzymatically hydrolyzed emulsified feed drying equipment, includes the following steps: Step 1, Feeding: Start the screw feeder and evenly distribute the enzymatically hydrolyzed emulsified feed onto the upper surface of the starting end of the annular mesh belt conveyor section through multiple feeding pipes; Step 2: Start the vacuum pump to draw the inside of the machine casing to a negative pressure state. At the same time, hot air is introduced through the air outlet plate. The hot air passes through the mesh of the mesh belt and blows towards the material layer to heat and dry the material. The water vapor generated by evaporation is extracted from the machine casing by the vacuum pump through the condenser and dust filter. Step 3: The feed dried in the first conveying section is carried by the mesh belt to the end of the first conveying section. It falls into the feed end of the second conveying section through the height difference between the first and second conveying sections. During the falling process, the feed layer is turned over. Step four: The dried feed falls from the end of the second conveying section into the first receiving hopper, and the dry feed is intermittently discharged outside the machine casing. Step 5: The rapping bars of the rapping assembly located in the return section rotate with the shaft and periodically impact the lower surface of the wire mesh in the return section, shaking off the residual material embedded in the mesh.

[0016] This invention provides a drying method and equipment for enzymatically hydrolyzed emulsified feed, which has the following beneficial effects: 1. By setting up a vacuum generating component to draw the inside of the machine casing to a negative pressure state, and in conjunction with the low-temperature hot air introduced through the main air inlet pipe and the branch air inlet pipe, rapid drying under low-temperature conditions is achieved, reducing the risk of heat-sensitive components being deactivated due to high-temperature drying in normal pressure environments. On this basis, multiple rollers are divided into upper roller group, middle roller group and lower roller group, so that a height difference is formed between the first conveying section and the second conveying section. As the material falls from the discharge end of the first conveying section to the feed end of the second conveying section, gravity naturally causes the material to be turned over as a whole. The turned material continues to undergo hot air penetration drying on the newly exposed surface, avoiding the defects of uneven drying and sticking to the mesh caused by the single-sided bearing of the mesh belt.

[0017] 2. By installing a rapping component above the return section, the rapping strips periodically impact the lower surface of the wire mesh in the return section as the shaft rotates, generating vibrations that dislodge residual material embedded in the mesh. After continuous operation, the mesh clogging rate is low, eliminating the need for manual cleaning and ensuring consistently stable drying efficiency. Simultaneously, this invention incorporates valves on both the first and second discharge pipes. The first discharge pipe employs an intermittent discharge method, while the second discharge pipe discharges material periodically during equipment operation or uniformly after the entire batch drying is completed, facilitating the maintenance of internal pressure within the machine casing. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a drying device for enzymatically hydrolyzed emulsified feed provided by the present invention. Figure 1 ; Figure 2 A schematic diagram of the structure of a drying device for enzymatically hydrolyzed emulsified feed provided by the present invention. Figure 2 ; Figure 3 A schematic cross-sectional view of the internal structure of the casing of a drying device for enzymatically hydrolyzed emulsified feed provided by the present invention; Figure 4 The present invention provides a drying device for enzymatically hydrolyzed emulsified feed. Figure 3 Front view structural diagram; Figure 5 The present invention provides a drying device for enzymatically hydrolyzed emulsified feed. Figure 3 Schematic diagram of the structure after removing the casing; Figure 6 A cross-sectional schematic diagram of the screw feeder in a drying device for enzymatically hydrolyzed emulsified feed provided by the present invention; Figure 7 This is a schematic diagram of the mesh belt structure of a drying device for enzymatically hydrolyzed emulsified feed provided by the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Machine casing; 200. Screw feeder; 201. Material distribution pipe; 202. Storage hopper; 300. Roller; 301. Mesh belt; 3011. Transmission belt; 3012. Wire mesh; 400. Air inlet branch pipe; 401. Air outlet plate; 402. Air inlet main pipe; 500. First receiving hopper; 501. First discharge pipe; 502. Second receiving hopper; 503. Second discharge pipe; 600. Rotating shaft; 601. Vibrating bar; 602. First motor; 700. Negative pressure pipe; 701. Condensate collector; 702. Dust filter; 703. Conveying pipe; 704. Vacuum pump; 800. Insert plate; 801. Sealing plate; 900. Baffle plate. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 7As shown in the figure, an embodiment of the present invention provides a drying device for enzymatically hydrolyzed emulsified feed, including a base plate and a housing 100 fixedly mounted on the base plate. The housing 100 is a sealed box structure. Multiple rollers 300 are rotatably connected to the inner wall of the housing 100. The number of rollers 300 is six, divided into an upper roller group, a middle roller group, and a lower roller group, arranged vertically in three layers. To prevent the mesh belt 301 from sagging, support rollers (not shown) can be arranged at intervals below the conveying section. An annular mesh belt 301 surrounds each roller 300. The mesh belt 301 includes two drive belts 3011 and a wire mesh 3012 fixedly connected between the two drive belts 3011. The two drive belts 3011 are located near the ends of the rollers 300, and the drive belts 3011 are rubber synchronous belts. The wire mesh 3012 is located between the two transmission belts 3011. The wire mesh 3012 is a 304 stainless steel woven fine mesh. The two sides of the wire mesh 3012 in the width direction are fixedly connected to the base of the rubber synchronous belt by vulcanization / adhesive embedding.

[0022] One of the rollers 300 is configured as the driving roller, which is driven to rotate by a main drive motor fixedly mounted on the outer wall of the housing 100. The remaining rollers 300 are driven rollers. The rollers 300 in the upper roller group and the middle roller group form the first conveying section of the mesh belt 301. The middle roller group and the lower roller group form the second conveying section of the mesh belt 301. The rollers 300 in the lower roller group form the return section of the mesh belt 301. The discharge end of the first conveying section is higher than the feed end of the second conveying section, creating a height difference between the two sections. When the material on the first conveying section is conveyed to the discharge end of the first conveying section, it falls into the feed end of the second conveying section through this height difference. During the falling process, it is tumbled, exposing the lower surface of the material in contact with the wire mesh 3012 to the upper surface.

[0023] In some specific implementation plans, such as Figure 1 , Figure 2 and Figure 3As shown, a material distribution assembly is installed on the inner top wall of the housing 100, above the starting end of the first conveying section of the mesh belt 301. The material distribution assembly includes a screw feeder 200 fixedly installed on the top of the housing 100. The feed inlet of the screw feeder 200 is connected to a storage hopper 202, which is a conical hopper. The housing of the screw feeder 200 is cylindrical, and axially extending conveying screw blades are installed inside. The conveying screw blades are driven to rotate by a motor fixedly installed at the end of the housing. Multiple material drop ports are evenly distributed along the axial direction at the bottom of the screw feeder 200, and are arranged at equal intervals along the width direction of the housing 100. A material distribution pipe 201 is fixedly connected to each material drop port. The material distribution pipe 201 is a vertically arranged round or square pipe, and the lower end of the material distribution pipe 201 faces the upper surface of the first conveying section. Each feed pipe 201 is evenly spaced along the width of the mesh belt 301, so that the enzymatically hydrolyzed emulsified feed conveyed by the screw feeder 200 enters the corresponding feed pipe 201 through each discharge port, and is evenly discharged to the upper surface of the starting end of the first conveying section under the action of gravity.

[0024] In some specific implementation plans, such as Figure 3 , Figure 4 and Figure 5 As shown. A baffle plate 900 extending to the surface of the first conveying section is also fixedly installed on the top wall of the housing 100. The baffle plate 900 is a rectangular thin plate, and its lower edge maintains a small gap with the upper surface of the material on the first conveying section, which is used to block the feed on the conveying section.

[0025] In some specific implementation plans, such as Figure 3 and Figure 5 As shown. A hot air source, such as a hot air generator, is provided outside the housing 100, and its air outlet is connected to the main air inlet pipe 402. Multiple air inlet branch pipes 400 are fixedly installed on the side wall of the housing 100, and the air inlet branch pipes 400 are arranged at intervals along the width direction of the housing 100. One end of each air inlet branch pipe 400 is located outside the housing 100 and is connected to the main air inlet pipe 402, while the ends of each air inlet branch pipe 400 located inside the housing 100 are connected to an air outlet plate 401. The air outlet plate 401 is fixed inside the housing 100. The air outlet plate 401 is located below the first conveying section and below the second conveying section, with a gap between the upper surface of the air outlet plate 401 and the lower surface of the first conveying section. Each air outlet plate 401 is a flat box-shaped structure, forming a gas equalization chamber inside, and multiple air outlet holes are opened on its upper surface.

[0026] Hot air generated by an external hot air generator is distributed to each inlet branch pipe 400 via the inlet main pipe 402, and then pressurized inside each outlet plate 401 before being sprayed upwards from each outlet hole. The air passes through the mesh of the wire mesh 3012 and blows onto the material carried on the upper surface of the first and second conveying sections, achieving heating and drying of the material. An airflow regulating valve and a temperature sensor are installed at the air inlet of the inlet main pipe 402. The airflow regulating valve is an electric butterfly valve, and the temperature sensor is a sheathed thermocouple, used to regulate the temperature and flow rate of the hot air entering the casing 100 in real time.

[0027] In some specific implementation plans, such as Figure 3 , Figure 4 and Figure 5 As shown, a rapping assembly is installed inside the housing 100 and above the return section of the conveyor belt 301. The rapping assembly includes a rotating shaft 600, multiple rapping strips 601, and a first motor 602. One end of the rotating shaft 600 extends through the side wall of the housing 100 and is fixedly connected to the output shaft of the first motor 602, which is fixedly installed outside the housing 100. The multiple rapping strips 601 are evenly fixed along the axial direction of the rotating shaft 600. Each rapping strip 601 is a flexible arc-shaped strip, and the rapping strips 601 are staggered in the circumferential direction of the rotating shaft 600.

[0028] When the first motor 602 drives the rotating shaft 600 to rotate, each vibrating bar 601 rotates synchronously with the rotating shaft 600. The free end of each vibrating bar 601 strikes the upper surface of the return section, causing the return section to vibrate and shaking off the residual feed particles embedded in the mesh of the wire mesh 3012.

[0029] In some specific implementation plans, such as Figure 1 and Figure 2 As shown. A vacuum generating assembly is installed outside the housing 100. The vacuum generating assembly includes a negative pressure pipe 700, a condensate trap 701, a delivery pipe 703, a dust filter 702, and a vacuum pump 704. One end of the negative pressure pipe 700 is connected to the top or side wall of the housing 100 and communicates with the interior of the housing 100. The other end of the negative pressure pipe 700 is connected to the air inlet of the condensate trap 701. The condensate trap 701 is a shell-and-tube heat exchanger with multiple heat exchange tubes inside. Cooling medium flows through the heat exchange tubes, with cooling water flowing through the tube side and hot, humid gas extracted from the housing 100 flowing through the shell side. The air outlet of the condensate trap 701 is connected to the air inlet of the dust filter 702 through the delivery pipe 703. The dust filter 702 has multiple sets of filter bags or filter cartridges inside to intercept feed powder carried out by the airflow. The air outlet of the dust filter 702 is connected to the air inlet of the vacuum pump 704 through a pipe. The vacuum pump 704 has its exhaust port connected to the atmosphere or an exhaust gas treatment system.

[0030] When the vacuum pump 704 starts, the gas inside the casing 100 is sequentially drawn out through the negative pressure pipe 700, the condensate trap 701, the conveying pipe 703, and the dust filter 702, maintaining the absolute pressure inside the casing 100. The negative pressure environment inside the casing 100 causes the moisture in the material to boil and evaporate at a low temperature. The water vapor produced by evaporation is drawn out with the airflow, condensed into liquid water by the condensate trap 701, and then discharged.

[0031] In some specific implementation plans, such as Figure 3 , Figure 4 and Figure 5 As shown. Inside the housing 100 and below the end of the second conveying section, there is a first receiving hopper 500. The upper opening of the first receiving hopper 500 receives the dried feed falling from the end of the second conveying section. The lower end of the first receiving hopper 500 is fixed with a first discharge pipe 501 extending to the outside of the housing 100. A valve is provided on the first discharge pipe 501.

[0032] In some specific implementation plans, such as Figure 3 , Figure 4 and Figure 5 As shown, a second receiving hopper 502 is also provided inside the housing 100 and below the first conveying section. The second receiving hopper 502 is located directly below the feeding pipe 201, that is, during normal feeding, the second receiving hopper 502 is used to collect the impurities that have passed through the wire mesh 3012. A second discharge pipe 503 is fixedly connected to the bottom of the second receiving hopper 502. The second discharge pipe 503 passes through the bottom of the housing 100 and extends to the outside of the housing 100. A valve is provided on the second discharge pipe 503.

[0033] Since the internal channels of the first discharge pipe 501 and the second discharge pipe 503 are connected to the interior of the casing 100 during discharge, continuous opening of the valve or the second valve may significantly affect the vacuum environment inside the casing 100. Therefore, the first discharge pipe 501 adopts an intermittent discharge method, meaning the valve opens and closes periodically; when open, it discharges accumulated dry feed, and when closed, it blocks external air. The second discharge pipe 503 also adopts an intermittent discharge method, discharging feed periodically during equipment operation or discharging all feed at once after the entire batch of drying work is completed.

[0034] During equipment operation, the vacuum pump 704 operates continuously, while hot air is continuously introduced into the casing 100 through the air inlet manifold 402. The pumping rate of the vacuum pump 704 is configured to be greater than the inlet flow rate of the hot air; the difference is used to remove water vapor generated by material evaporation. A dynamic balance is formed between the hot air inlet flow rate and the pumping rate of the vacuum pump 704, maintaining the absolute pressure inside the casing 100 within the set operating range, preventing the vacuum from being completely destroyed. The hot air also acts as a carrier gas, carrying the water vapor generated by material evaporation and diffusing it inside the casing 100, where it is quickly drawn away by the vacuum pump 704 through the negative pressure pipe 700. The first discharge pipe 501 and the second discharge pipe 503 remain closed during the discharge interval; at the moment of discharge opening, the material column naturally accumulates, providing an airlock seal, and combined with the instantaneous suction of the vacuum pump 704, normal vacuum can be restored within seconds.

[0035] In some specific implementation plans, such as Figure 2 , Figure 3 and Figure 4 As shown. A through groove is formed on the side wall of the housing 100 near the starting end of the conveyor belt 301. The through groove has a rectangular opening and extends along the width of the side wall of the housing 100. Two insert plates 800 are symmetrically fixed on the outside of the housing 100 and on both sides of the through groove. Each insert plate 800 has a slot on its opposite side, which extends vertically. A sealing plate 801 is inserted between the slots of the two insert plates 800. An inclined plate is provided on the top of the base, tilting towards the through groove, to facilitate the collection of shaken-off material into the through groove. The sealing plate 801 is configured to be able to be pulled up and down along the slot. When pulled up, the through groove is opened, allowing the operator to collect the shaken-off material inside the housing 100 through the through groove; when inserted downwards, the through groove is closed to maintain the airtightness of the housing 100. To ensure the airtightness of the housing 100, a sealing element is provided at the connection between the sealing plate 801 and the housing 100.

[0036] A method for drying enzymatically hydrolyzed emulsified feed is also provided, using enzymatically hydrolyzed emulsified feed drying equipment, including the following steps: Step 1, Feeding: Start the screw feeder 200 and evenly distribute the enzymatically hydrolyzed emulsified feed on the upper surface of the starting end of the conveying section of the annular mesh belt 301 through multiple feeding pipes 201. Step 2: Start the vacuum pump 704 to draw the inside of the casing 100 to a negative pressure state. At the same time, hot air is introduced through the air outlet plate 401. The hot air passes through the mesh 3012 of the mesh belt 301 and blows towards the material layer to heat and dry the material. The water vapor generated by evaporation is extracted from the casing 100 by the vacuum pump 704 through the condenser 701 and the dust filter 702. Step 3: The feed dried in the first conveying section is carried by the mesh belt 301 to the end of the first conveying section. It falls into the feed inlet of the second conveying section through the height difference between the first and second conveying sections. During the falling process, the feed layer is turned over. Step 4: The dried feed falls from the end of the second conveying section into the first receiving hopper 500, and the dry feed is intermittently discharged outside the casing 100. Step 5: The rapping bars 601 of the rapping assembly located in the return section rotate with the rotating shaft 600 and periodically impact the lower surface of the wire mesh 3012 in the return section, shaking off the residual material embedded in the mesh.

[0037] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: The screw feeder 200 is activated, feeding the enzymatically hydrolyzed emulsified feed from the storage hopper 202 into the housing of the screw feeder 200. The feed is evenly distributed from the bottom of the screw feeder 200 along the distribution pipe 201 to the upper surface of the starting end of the first conveying section. As the annular mesh belt 301 moves forward, a continuous layer of feed is formed on the upper surface of the first conveying section. Driven by the feed-laden mesh belt 301, a vacuum is maintained inside the housing 100 under the continuous suction of the vacuum pump 704. Under this negative pressure environment, the temperature threshold required for moisture evaporation in the feed is lowered. Hot air is generated by an external hot air generator, distributed to each inlet branch pipe 400 via the main inlet pipe 402, and then enters the outlet plate 401 located below the first conveying section. The hot air is sprayed upward from the outlet plate 401, passing through the mesh of the wire mesh 3012 and blowing directly onto the lower surface of the feed layer.

[0038] During this process, the moisture in the feed evaporates rapidly under the combined effects of negative pressure and hot air heating. The hot air carries the water vapor generated by evaporation and diffuses inside the casing 100, while the vacuum pump 704 continuously extracts the mixture of water vapor and hot air from the outside of the casing 100 via the negative pressure pipe 700. The extracted hot and humid gas first enters the condenser 701, where the water vapor condenses into liquid water on the outer wall of the heat exchange tubes and is then discharged. The non-condensable gas enters the dust filter 702 via the conveying pipe 703 to remove the carried powder, and finally is discharged outside the machine via the vacuum pump 704.

[0039] As the feed travels along the annular conveyor belt 301 to the end of the first conveying section, it enters the height difference transition zone between the first and second conveying sections. During the process of the feed falling from the discharge end of the first conveying section to the feed inlet of the second conveying section, the entire feed layer is agitated. The agitated feed continues to be conveyed forward on the second conveying section, where the air outlet plate 401 located below the second conveying section blows hot air from below, further drying the newly exposed material surface. This agitation process ensures that all surfaces of the feed receive direct hot air in sequence, avoiding insufficient moisture evaporation and material adhesion caused by prolonged contact with the mesh on one side, thereby improving the drying uniformity and final drying efficiency of the entire batch of material.

[0040] The dried feed is carried by the annular mesh belt 301 to the end of the second conveying section, and falls from the end of the second conveying section into the first receiving hopper 500 below, discharging the dry feed accumulated in the first receiving hopper 500 to the outside of the casing 100.

[0041] After unloading, the annular conveyor belt 301 continues to the return section. In the return section, the first motor 602 of the rapping assembly drives the rotating shaft 600 to rotate, and each rapping bar 601 rotates synchronously with the shaft 600. During rotation, the free ends of the rapping bars 601 periodically impact the lower surface of the wire mesh 3012 in the return section, causing high-frequency vibration and dislodging residual feed particles embedded in the mesh of the wire mesh 3012. The dislodged powder falls to the bottom of the casing 100. After the equipment has run for a period of time, the operator can pull up the sealing plate 801 to open the through slot, allowing for centralized cleaning of the dislodged material accumulated at the bottom of the casing 100. After cleaning, the sealing plate 801 is inserted downwards to close the through slot.

[0042] During normal material feeding, the screw feeder 200 discharges feed through each feeding pipe 201 into the feed on the upper surface of the starting end of the first conveying section. If some fine material passes through the mesh of the wire mesh 3012 and falls, it will fall into the second receiving hopper 502 located directly below the feeding pipe 201. The debris collected in the second receiving hopper 502 is discharged periodically during equipment operation, or discharged uniformly after the entire batch of material has been dried.

[0043] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A drying device for enzymatically hydrolyzed emulsified feed, comprising a base plate and a housing (100) fixed to the base plate, characterized in that, Also includes: A vacuum generating assembly is used to evacuate the interior of the housing (100) to a negative pressure state; The mesh belt (301) conveyor assembly includes a plurality of rollers (300) rotatably connected to the inner wall of the housing (100) and an annular mesh belt (301) surrounding the rollers (300). The fabric assembly is located on the inner top wall of the housing (100) and above the starting end of the conveying section of the mesh belt (301). The fabric assembly includes a plurality of fabric tubes (201) spaced apart along the width direction of the mesh belt (301). The hot air drying assembly includes an air outlet plate (401) located below the conveying section of the mesh belt (301). A vibration assembly is disposed inside the housing (100) and above the return section of the conveyor belt (301). The vibration assembly includes a plurality of vibration strips (601). When the vibration strips (601) rotate, they periodically impact the return section of the conveyor belt (301). The first receiving hopper (500) is located below the end of the conveying section of the mesh belt (301) and is used to discharge the dried feed out of the casing (100).

2. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 1, characterized in that, The multiple rollers (300) are divided into an upper roller group, a middle roller group and a lower roller group. The upper roller group and the middle roller group form a first conveying section of the mesh belt (301), and the middle roller group and the lower roller group form a second conveying section of the mesh belt (301). A height difference is formed between the first conveying section and the second conveying section.

3. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 2, characterized in that, The mesh belt (301) includes two drive belts (3011) and a wire mesh (3012) fixed between the drive belts (3011). The two drive belts (3011) are respectively located at the ends of the roller (300).

4. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 3, characterized in that, The hot air drying assembly also includes an air inlet main pipe (402) and a plurality of air inlet branch pipes (400) fixed on the side wall of the housing (100), wherein the air inlet branch pipes (400) are connected to the air inlet main pipe (402) and the air outlet plate (401).

5. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 1, characterized in that, The fabric assembly also includes a screw feeder (200) fixed to the top of the housing (100). The screw feeder (200) has multiple material drop ports evenly opened along the axis at its bottom, and the fabric tube (201) is fixed at the material drop ports.

6. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 5, characterized in that, The vibrating assembly also includes a rotating shaft (600) rotatably connected to the side wall of the housing (100) and a first motor (602) fixed to the outside of the housing (100). The rotating shaft (600) is fixedly connected to the output shaft of the first motor (602). The vibrating strips (601) are multiple and are evenly arranged along the axial direction of the rotating shaft (600).

7. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 1, characterized in that, The vacuum generating assembly includes a vacuum pump (704), a condensate trap (701), and a dust filter (702). The condensate trap is connected to the inside of the housing (100) via a negative pressure pipe (700). The dust filter (702) is connected to the condensate trap (701) via a delivery pipe (703). The dust filter (702) is connected to the vacuum pump (704).

8. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 2, characterized in that, A second receiving hopper (502) is fixed inside the housing (100) and below the first conveying section of the mesh belt (301). The second receiving hopper (502) is located directly below the material distribution pipe (201). A second discharge pipe (503) and a first discharge pipe (501) are fixed at the bottom of the second receiving hopper (502) and the first receiving hopper (500), respectively.

9. The drying equipment for enzymatically hydrolyzed emulsified feed as described in claim 8, characterized in that, A through groove is opened on the side of the housing (100) near the starting end of the mesh belt (301). A plug plate (800) is symmetrically fixed on the outside of the housing (100) and on one side of the through groove. A slot is opened on the opposite side of the plug plate (800), and a sealing plate (801) is inserted into the slot.

10. A method for drying enzymatically hydrolyzed emulsified feed, using the enzymatically hydrolyzed emulsified feed drying equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1, feeding: Start the screw feeder (200) and evenly distribute the enzymatically hydrolyzed emulsified feed on the upper surface of the starting end of the conveying section of the annular mesh belt (301) through multiple feeding pipes (201); Step 2: Start the vacuum pump (704) to draw the inside of the casing (100) to a negative pressure state. At the same time, hot air is introduced through the air outlet plate (401). The hot air passes through the mesh (3012) of the mesh belt (301) and blows onto the material layer to heat and dry the material. The water vapor generated by evaporation is drawn out of the casing (100) by the vacuum pump (704) through the condenser (701) and the dust filter (702). Step 3: The feed dried in the first conveying section is carried by the mesh belt (301) to the end of the first conveying section. It falls into the feed inlet of the second conveying section through the height difference between the first and second conveying sections. During the falling process, the feed layer is turned over. Step 4: The dried feed falls from the end of the second conveying section into the first receiving hopper (500), and the dry feed is intermittently discharged outside the casing (100). Step 5: The rapping bars (601) of the rapping assembly located in the return section rotate with the rotating shaft (600) and periodically impact the lower surface of the wire mesh (3012) in the return section, shaking off the residual material embedded in the mesh.

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