Corn cob litter preparation system

Abstract

The application discloses a corn cob cat litter preparation system and relates to the technical field of cat litter preparation, which mainly aims at improving the preparation efficiency of corn cob cat litter. The main technical scheme of the application is as follows: the corn cob cat litter preparation system comprises, in sequence, a crushing unit, a batching unit, a mixing unit, a granulating unit and a drying and screening unit; wherein the granulating unit comprises a first screw conveying mechanism and a granulating mechanism; the granulating mechanism comprises a first shell, a mounting vertical plate, a ring die and a plurality of compression rollers; the mounting vertical plate is fixedly arranged in the first shell; the ring die and the plurality of compression rollers are rotationally arranged on the front side of the mounting vertical plate respectively; the plurality of compression rollers are centrally symmetrical about the central axis of the ring die; the ring die and the plurality of compression rollers are connected to a driving mechanism respectively; the circumferential wall of the ring die is uniformly provided with a plurality of die holes; the lower end of the first shell is provided with a discharge port; the ring die is located directly above the discharge port; and the discharge pipe of the first screw conveying mechanism is connected to the front side opening of the ring die.

Description

Technical Field

[0001] This invention relates to the field of cat litter preparation technology, and more particularly to a corncob cat litter preparation system. Background Technology

[0002] Cat litter is used by cat owners to bury feces and urine in their cats. It has good absorbency. The principle of deodorizing cat litter is to absorb odor molecules in cat urine and feces through physical adsorption, thereby reducing odor. It also neutralizes odor substances in urine and feces through chemical neutralization, and its good clumping properties allow the cat litter to quickly wrap urine and feces, making it easy to clean and reducing the emission of odors.

[0003] Bentonite cat litter in the current technology is of good quality, simple in process and low in cost. However, cat litter made from bentonite is often prone to breakage and powdering during use due to insufficient molding strength during granulation, which affects the overall user experience of the cat litter. With the continuous development of technology, corn cob cat litter has emerged.

[0004] However, the efficiency of corn cob cat litter preparation in existing technologies needs to be improved. Summary of the Invention

[0005] In view of this, the present invention provides a corn cob cat litter preparation system, the main purpose of which is to improve the preparation efficiency of corn cob cat litter.

[0006] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0007] This invention provides a corn cob cat litter preparation system, which includes: a crushing unit, a batching unit, a mixing unit, a granulation unit and a drying and sieving unit connected in sequence;

[0008] The granulation unit includes a first spiral conveying mechanism and a granulation mechanism. The granulation mechanism includes a first housing, a mounting plate, a ring die, and multiple pressure rollers. The mounting plate is fixedly disposed inside the first housing. The ring die and the multiple pressure rollers are rotatably disposed on the front side of the mounting plate. The multiple pressure rollers are symmetrical about the central axis of the ring die. The ring die and the multiple pressure rollers are respectively connected to a driving mechanism. The circumferential wall of the ring die is evenly distributed with multiple die holes. The lower end of the first housing is provided with a discharge port. The ring die is located directly above the discharge port. The discharge pipe of the first spiral conveying mechanism is connected to the front opening of the ring die.

[0009] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0010] Optionally, the driving mechanism includes a primary driving gear, a secondary driving gear, a primary driven gear, a secondary driven gear, and multiple transmission gears. A toothed ring is fixedly installed on the circumference of the ring mold. The primary driving gear and the secondary driving gear are coaxially rotatably disposed on both sides of the mounting plate. The primary driven gear and the secondary driven gear are coaxially rotatably disposed on the rear side of the mounting plate. The primary driving gear meshes with the primary driven gear, and the secondary driving gear meshes with the toothed ring. Each transmission gear is coaxially connected to one of the pressure rollers, and the secondary driven gear meshes with multiple transmission gears.

[0011] Optionally, the crushing unit includes a first crushing mechanism, which includes a hammer mill, a first cyclone separator, a first bag filter, and a second screw conveyor. The hammer mill includes a second housing, a crushing shaft, a screen, and multiple hammers. The crushing shaft is rotatably connected to the opposite side wall of the second housing. The multiple hammers are respectively hinged to the axial side of the crushing shaft. The screen is located below the crushing shaft. The side wall of the second housing below the screen is connected to the tangential inlet of the first cyclone separator via a pipe. The upper outlet of the first cyclone separator is connected to the bag filter. The lower end of the second housing, the lower outlet of the first cyclone separator, and the slag discharge port of the first bag filter are respectively connected to the inlet of the second screw conveyor.

[0012] Optionally, the pulverizing unit further includes a second pulverizing mechanism, which includes an ultrafine pulverizer, a second cyclone separator, a second bag filter, and a third screw conveying mechanism. The ultrafine pulverizer includes a pulverizing chamber, a pulverizing disc, a toothed ring, a classifying impeller, a guide hood, and a diverting hood. The pulverizing disc, the diverting hood, the classifying impeller, and the guide hood are coaxially arranged in the pulverizing chamber from bottom to top. The toothed ring is fixedly connected to the inner wall of the pulverizing chamber, and the edges of the toothed ring and the pulverizing disc correspond to each other. The upper exhaust port of the pulverizing chamber is connected to the tangential inlet of the second cyclone separator, the upper outlet of the second cyclone separator is connected to the second bag filter, and the lower outlet of the second cyclone separator and the slag discharge port of the second bag filter are respectively connected to the inlet of the third screw conveying mechanism.

[0013] Optionally, the mixing unit includes a third housing, two arc-shaped plates, and two rotor shafts. The lower end of the third housing is provided with a discharge port. The two arc-shaped plates are rotatably connected to opposite sides of the discharge port. The lower surface of the arc-shaped plates is hinged to a cylinder structure to control the opening and closing of the two arc-shaped plates. Each rotor shaft is located above one of the arc-shaped plates. The axial side of the rotor shaft is fixedly connected to multiple blades. The included angle between the blade surface and the axial direction of the rotor shaft is between 30° and 45°. The upper end of the third housing is provided with two feed ports for receiving main materials and auxiliary materials, respectively.

[0014] Optionally, the mixing unit further includes a jet pipe and a liquid spray pipe, which are respectively disposed above the rotor shaft.

[0015] Optionally, the batching unit includes a feeding mechanism and a metering mechanism. The feeding mechanism includes a feeding hopper and a first vibrating screen connected in sequence. The metering mechanism includes a conveying auger, a batching bin, and a batching scale connected in sequence. The undersize discharge pipe of the first vibrating screen and the output pipe of the crushing unit are respectively connected to the conveying auger.

[0016] Optionally, the drying and screening unit includes a mesh belt dryer and a second vibrating screen connected in sequence. The inlet of the mesh belt dryer is connected to the granulation unit, and the discharge pipe of the oversize material of the second vibrating screen is connected to the packaging section.

[0017] Optionally, it also includes a third vibrating screen and a return auger, the outlet of the third spiral conveyor is connected to the inlet of the third vibrating screen, the oversize discharge pipe of the third vibrating screen is connected to the inlet of the ultrafine pulverizer through the return auger, and the undersize discharge pipe of the third vibrating screen is connected to the batching unit.

[0018] By employing the above technical solution, the present invention has at least the following advantages:

[0019] In the corn cob cat litter preparation process, after the main and auxiliary materials are mixed evenly, they first enter the buffer bin. The mixture in the buffer bin first enters the first spiral conveyor mechanism, and then enters the inner cavity of the ring die. The drive mechanism drives the ring die and multiple pressure rollers to rotate separately, extruding and granulating the mixture. In existing pellet mills, the pressure rollers are not connected to the drive mechanism. The mixture fills the gap space between the ring die and the pressure rollers. The rotating ring die drives the pressure rollers to rotate through the material, and the pressure rollers rotate passively. However, in this equipment, the ring die and multiple pressure rollers rotate independently. The rate at which the ring die and multiple pressure rollers crush the mixture is faster, that is, the rate at which material particles are qualified is faster per unit time. The amount of material passing through the ring die hole per unit time is increased, that is, the pelleting speed is increased, thereby improving the efficiency of the entire system in cat litter preparation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a corncob cat litter preparation system provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the granulation unit.

[0022] Figure 3 Side view of the hybrid unit;

[0023] Figure 4 Top view of the hybrid unit;

[0024] Figure 5 This is an axial view of the hybrid unit;

[0025] Figure 6 This is an axial cross-sectional view of the first crushing mechanism;

[0026] Figure 7 This is a partial perspective view of the first crushing mechanism;

[0027] Figure 8 This is a cross-sectional view of an ultrafine pulverizer.

[0028] The reference numerals in the accompanying drawings include: 1. First screw conveyor mechanism; 2. Granulation mechanism; 201. First housing; 202. Mounting plate; 203. Ring die; 204. Pressure roller; 205. Die hole; 206. Discharge port; 207. First-stage drive gear; 208. Second-stage drive gear; 209. First-stage driven gear; 210. Second-stage driven gear; 211. Transmission gear; 212. Gear ring; 3. Hammer mill; 4. First cyclone separator; 5. First bag filter; 6. Second screw conveyor mechanism; 301. Second housing; 302. Crushing shaft; 303. Screen; 304. Hammer; 305. Material hopper to be crushed; 306. Drainage pipe; 7. Ultrafine pulverizer; 8. Second screw conveyor mechanism; 9. Second screw conveyor mechanism; 10. First screw conveyor mechanism; 11. Second housing; 202. Crushing shaft; 303. Screen; 304. Hammer; 305. Material hopper to be crushed; 306. Drainage pipe; 7. Ultrafine pulverizer; 8. Second screw conveyor mechanism; 9. Second screw conveyor mechanism; 10. First screw conveyor mechanism; 11. Second screw conveyor mechanism; 12. Second screw conveyor mechanism; 13. Second screw conveyor mechanism; 14. Second screw conveyor mechanism; 15. Second screw conveyor mechanism; 16. Second screw conveyor mechanism; 17. Second screw conveyor mechanism; 18. Second screw conveyor mechanism; 19. Second screw conveyor mechanism; 10. Second screw conveyor mechanism; 10. Second screw conveyor mechanism; 10. Second screw conveyor mechanism; 11. Second screw conveyor mechanism; 12. Second screw conveyor mechanism; 13. Second screw conveyor mechanism; 18 8. Air separator; 9. Second bag filter; 10. Third screw conveyor mechanism; 701. Crushing chamber; 702. Crushing disc; 703. Gear ring; 704. Grading impeller; 705. Flow guide hood; 706. Flow divider; 707. Screw feeder; 708. First motor; 709. Pulley; 11. Mixing unit; 1101. Third housing; 1102. Arc plate; 1103. Rotor shaft; 1104. Paddle; 1105. Feed inlet; 1106. Jet pipe; 1107. Liquid spray pipe; 12. Feed hopper; 13. First vibrating screen; 14. Batching bin; 15. Batching scale; 16. Mesh belt dryer; 17. Second vibrating screen; 18. Third vibrating screen; 19. Return auger. Detailed Implementation

[0029] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a corn cob cat litter preparation system, which includes: a crushing unit, a batching unit, a mixing unit 11, a granulation unit and a drying and sieving unit connected in sequence;

[0032] The granulation unit includes a first spiral conveying mechanism 1 and a granulation mechanism 2. The granulation mechanism 2 includes a first housing 201, a mounting plate 202, a ring die 203, and multiple pressure rollers 204. The mounting plate 202 is fixedly disposed inside the first housing 201. The ring die 203 and the multiple pressure rollers 204 are rotatably disposed on the front side of the mounting plate 202. The multiple pressure rollers 204 are symmetrical about the central axis of the ring die 203. The ring die 203 and the multiple pressure rollers 204 are respectively connected to a driving mechanism. The circumferential wall of the ring die 203 is evenly distributed with multiple die holes 205. The lower end of the first housing 201 is provided with a discharge port 206. The ring die 203 is located directly above the discharge port 206. The discharge pipe of the first spiral conveying mechanism 1 is connected to the front opening of the ring die 203.

[0033] The working process of a corncob cat litter preparation system is as follows:

[0034] In the corn cob cat litter preparation process, after the main material and auxiliary materials are mixed evenly, they first enter the buffer bin. The mixture in the buffer bin first enters the first spiral conveyor mechanism 1, and then enters the inner cavity of the ring die 203. The drive mechanism drives the ring die 203 and multiple pressure rollers 204 to rotate separately, extruding and granulating the mixture. In existing pellet mills, the pressure rollers 204 are not connected to the drive mechanism. The mixture fills the gap space between the ring die 203 and the pressure rollers 204. The rotating ring die 203 drives the pressure rollers 204 to rotate through the material, and the pressure rollers 204 rotate passively. However, in this equipment, the ring die 203 and multiple pressure rollers 204 rotate independently. The rate at which the ring die 203 and multiple pressure rollers 204 crush the mixture is faster, that is, the rate at which material particles are qualified is faster per unit time. The amount of material passing through the die hole 205 of the ring die 203 per unit time is increased, that is, the pelleting speed is increased, thereby improving the efficiency of the entire system in cat litter preparation.

[0035] Specifically, there is a height difference between adjacent processing equipment, and a bucket elevator is used to lift materials to the required position.

[0036] Specifically, the ring die 203 rotates at a speed of 50-70 r / min, the pressure roller 204 has a pressure of 5-8 MPa and a rotation speed of 30-40 r / min. Multiple cutters are arranged sequentially on the axial side of the pressure roller 204. When the pressure roller 204 squeezes the material, it presses the material into the die hole 205 of the ring die 203. The cutters cut the particles to a preset length, with a granulation length of 3-8 mm and a particle forming rate of ≥95% after granulation.

[0037] like Figure 2 As shown, in a specific embodiment, the driving mechanism includes a primary driving gear 207, a secondary driving gear 208, a primary driven gear 209, a secondary driven gear 210, and multiple transmission gears 211. A toothed ring 212 is fixedly installed on the circumference of the ring mold 203. The primary driving gear 207 and the secondary driving gear 208 are coaxially rotatably disposed on both sides of the mounting plate 202. The primary driven gear 209 and the secondary driven gear 210 are coaxially rotatably disposed on the rear side of the mounting plate 202. The primary driving gear 207 meshes with the primary driven gear 209, and the secondary driving gear 208 meshes with the toothed ring 212. Each transmission gear 211 is coaxially connected to one of the pressure rollers 204, and the secondary driven gear 210 meshes with multiple transmission gears 211.

[0038] In this embodiment, specifically, a drive motor is also included. The output shaft of the drive motor is connected to the primary drive gear 207 and the secondary drive gear 208 via a coupling. By starting the drive motor, the ring die 203 and multiple pressure rollers 204 rotate independently, realizing the active extrusion granulation of the mixture by the ring die 203 and the pressure rollers 204, which improves the granulation speed of the material compared with the prior art.

[0039] like Figure 1 and Figure 6 and Figure 7As shown, in a specific embodiment, the crushing unit includes a first crushing mechanism, which includes a hammer mill 3, a first cyclone separator 4, a first bag filter 5, and a second screw conveyor 6. The hammer mill 3 includes a second housing 301, a crushing shaft 302, a screen 303, and a plurality of hammers 304. The crushing shaft 302 is rotatably connected to the opposite side wall of the second housing 301. The plurality of hammers 304 are respectively hinged to the axial side of the crushing shaft 302. The screen 303 is disposed below the crushing shaft 302. The side wall of the second housing 301 below the screen 303 is connected to the tangential inlet of the first cyclone separator 4 through a drain pipe 306. The upper outlet of the first cyclone separator 4 is connected to the first bag filter 5. The lower end of the second housing 301, the lower outlet of the first cyclone separator 4, and the slag discharge port of the first bag filter 5 are respectively connected to the inlet of the second screw conveyor 6.

[0040] In this embodiment, specifically, it also includes a crushing hopper 305 and a conveying auger. The crushing hopper 305, the conveying auger, and the feeding port of the second housing 301 are connected in sequence. The corn cobs to be crushed are first fed into the crushing hopper 305. The conveying auger ensures a stable material conveying speed, thereby ensuring the stability of the material flow rate received by the second housing 301. With the rotation of the crushing shaft 302, multiple hammers 304 swing and shear the corn cobs to improve their fineness. At the same time, the first cyclone separator 4 and the second housing 301... The interconnection creates a pressure difference on both sides of the screen 303. Under the action of this pressure difference, the crushed corn cob particles will pass through the screen holes more quickly. Most of the particles after passing through the screen holes settle to the lower part of the second shell 301 and enter the second screw conveyor mechanism 6. A small portion of the particles arrives sequentially at the first cyclone separator 4 and the first bag dust collector 5, where they settle and enter the second screw conveyor mechanism 6. In this way, the corn cob particles initially crushed by the first crushing mechanism are completely conveyed to the next device by the second screw conveyor mechanism 6, avoiding material loss.

[0041] Specifically, it also includes a motor, the output shaft of which is coaxially connected to the crushing shaft 302. The motor speed is 1200-1500 r / min, the mesh size of the screen 303 is 5-15 mm, and the feeding speed is 4500-5500 kg / h.

[0042] like Figure 1 and Figure 8As shown in the specific embodiment, the pulverizing unit further includes a second pulverizing mechanism, which includes an ultrafine pulverizer 7, a second cyclone separator 8, a second bag filter 9, and a third screw conveyor mechanism 10. The ultrafine pulverizer 7 includes a pulverizing chamber 701, a pulverizing disc 702, a gear ring 703, a classifying impeller 704, a flow guide 705, and a flow divider 706. The pulverizing disc 702, the flow divider 706, the classifying impeller 704, and the flow guide 705 are coaxially arranged from bottom to top. The toothed ring 703 is fixedly connected to the inner wall of the grinding chamber 701 and placed inside the grinding chamber 701. The edge of the toothed ring 703 corresponds to the edge of the grinding disc 702. The upper exhaust port of the grinding chamber 701 is connected to the tangential inlet of the second cyclone separator 8. The upper outlet of the second cyclone separator 8 is connected to the second bag filter 9. The lower outlet of the second cyclone separator 8 and the slag discharge port of the second bag filter 9 are respectively connected to the inlet of the third screw conveyor mechanism 10.

[0043] In this embodiment, specifically, the side wall of the crushing chamber 701 is connected to the screw feeder 707. The material initially crushed by the first crushing mechanism enters the crushing chamber 701 through the screw feeder 707, is broken by the impact of the blades on the high-speed rotating crushing disc 702, and flies towards the toothed ring 703 at a high speed. The gap between the blades and the toothed ring 703 is very small, and the airflow between the blades and the toothed ring 703 changes instantaneously due to the change in the flow cross section. As a result, alternating stress is generated at the crack tip of the material. The material is crushed under this repeated action. The crushed raw material rises along the outer wall of the diverter 706 with the upward airflow from the bottom, and reaches the classifying impeller 704 along the guide shroud 705. Based on the balance between the centrifugal force of the classifying impeller 704 and the centripetal force of the attracted airflow, qualified powder is sucked out of the machine, and coarse material is returned to the crushing chamber 701 for re-crushing. Thus, over-crushing can be avoided, thereby achieving the desired particle size. In addition, the particle size of the finished product can be adjusted by changing the rotation speed of the classifying impeller 704 while maintaining the airflow.

[0044] Specifically, the flow divider 706 is annular, wherein the size of the upper port of the flow divider 706 is larger than the size of the lower port of the annular. The gap between the flow divider 706 and the inner wall of the crushing chamber 701 forms an upward channel for crushed materials, and the internal space of the flow divider 706 forms a downward space for coarse materials. In summary, the flow divider 706 guides the material particles, thereby enabling unqualified materials to be repeatedly crushed.

[0045] Specifically, it also includes a first motor 708, a second motor, and a pulley 709. The first motor 708 is installed above the crushing chamber 701 and is coaxially connected to the classifying impeller 704. The pulley 709 is located below the crushing chamber 701 and is coaxially connected to the crushing disc 702. The output shaft of the second motor is connected to the pulley 709 via a belt. The bottom wall of the crushing chamber 701 is provided with an air inlet. The exhaust pipe of the second bag filter 9 is connected to the induced draft fan, thereby generating an airflow that flows sequentially through the crushing chamber 701, the second cyclone separator 8, and the second bag filter 9, driving the crushed material out of the crushing chamber 701 and collecting the crushed material.

[0046] Specifically, the second motor has a speed of 1500-2900 r / min, the gap between the blade and the gear ring 703 is 0.1-0.3 mm, the first motor 708 has a speed of 1500-2000 r / min, the output particle size is 20-40 mesh, and the fine powder content is ≥85%.

[0047] like Figures 3 to 5 As shown, in a specific embodiment, the mixing unit 11 includes a third housing 1101, two arc-shaped plates 1102, and two rotor shafts 1103. The lower end of the third housing 1101 is provided with a discharge port 206. The two arc-shaped plates 1102 are rotatably connected to the opposite sides of the discharge port 206. The lower surface of the arc-shaped plates 1102 is hinged to a cylinder structure to control the opening and closing of the two arc-shaped plates 1102. Each rotor shaft 1103 is disposed above one of the arc-shaped plates 1102. The axial side of the rotor shaft 1103 is fixedly connected to a plurality of blades 1104. The included angle between the plate surface of each blade 1104 and the axial direction of the rotor shaft 1103 is between 30° and 45°. The upper end of the third housing 1101 is provided with two feed ports 1105 for receiving the main material and the auxiliary material, respectively.

[0048] In this embodiment, one end of the cylinder structure is hinged to the lower surface of the arc plate 1102, and the other end of the cylinder structure is hinged to the bottom support of the third housing 1101. The piston rod of the cylinder structure extends and retracts, which can drive the arc plate 1102 to open and close relative to the discharge port 206. Multiple blades 1104 on the periphery of the rotor shaft 1103 cooperate with the arc plate 1102 to stir the material. Moreover, the included angle between the plate surface of each blade 1104 and the axial direction of the rotor shaft 1103 is between 30° and 45°. During the rotation of the rotor shaft 1103, the blades 1104 drive the material to roll up and down and tumble left and right at the same time, forming a weightless zone in the middle of the two rotor shafts 1103. The main material enters the third housing 1101 from one feed port 1105, and the auxiliary material enters the third housing 1101 from the other feed port 1105. The main material and the auxiliary material are interleaved and sheared, and quickly mixed evenly.

[0049] Specifically, the auxiliary material feeding hopper is connected to another inlet 1105 of the third housing 1101 for adding some auxiliary materials (CMC, phenolic resin or antibacterial agent). A bag filter is provided above the auxiliary material feeding hopper to remove the dust generated during feeding.

[0050] like Figure 3 and Figure 5 As shown, in a specific embodiment, the mixing unit 11 further includes a jet pipe 1106 and a liquid spray pipe 1107, which are respectively disposed above the rotor shaft 1103.

[0051] In this embodiment, specifically, multiple nozzles are axially mounted on the jet pipe 1106 and the liquid spraying pipe 1107, which are used to spray compressed air and deionized water into the material to adjust the material humidity and ensure that the binder and corn cob powder are fully combined.

[0052] Specifically, the rotational speed of rotor shaft 1103 is 50-80 r / min, the mixing time is 20-25 min, deionized water is added during the mixing process, the moisture content of the material is controlled to be 19-23%, and the coefficient of variation of uniformity of the mixed material is ≤5%.

[0053] like Figure 1 As shown, in a specific embodiment, the batching unit includes a feeding mechanism and a metering mechanism. The feeding mechanism includes a feeding hopper 12 and a first vibrating screen 13 connected in sequence. The metering mechanism includes a conveying auger, a batching bin 14 and a batching scale 15 connected in sequence. The undersize discharge pipe of the first vibrating screen 13 and the output pipe of the crushing unit are respectively connected to the conveying auger.

[0054] In this embodiment, specifically, the lower end of the auxiliary material feeding hopper 12 is connected to the inlet of the auger mechanism, the outlet of the auger mechanism is connected to the inlet of the first vibrating screen 13 through a bucket elevator, and the undersize discharge pipe of the first vibrating screen 13 is connected to the conveying auger through a bucket elevator, so that the auxiliary material after removing large-diameter stone particles and impurities can reach the conveying auger.

[0055] Specifically, in the material preparation stage, the ingredients include main materials and auxiliary materials. The main material is 70-85% ultrafine corn cob powder processed by the crushing unit, and the auxiliary materials are sodium bentonite, sodium carboxymethyl cellulose CMC or guar gum, modified starch, and tea polyphenol antibacterial agent. An automatic weighing batching scale 15 is used, and the batching accuracy is ≤±0.2%.

[0056] like Figure 1As shown, in a specific embodiment, the drying and screening unit includes a mesh belt dryer 16 and a second vibrating screen 17 connected in sequence. The inlet of the mesh belt dryer 16 is connected to the granulation unit, and the discharge pipe of the oversize material of the second vibrating screen 17 is connected to the packaging section.

[0057] In this embodiment, specifically, the granulated wet granules enter the mesh belt dryer 16 and are evenly spread on the mesh belt. They move slowly with the mesh belt, and the hot air generated by the heating chamber passes vertically through the granule layer to achieve heat transfer and moisture evaporation. The exhaust device discharges the hot and humid air, and the material after removing the hot and humid air reaches the second vibrating screen 17. Large particles are intercepted by the screen 303 of the second vibrating screen 17 and discharged to the packaging section through the screen discharge pipe to avoid generating a large amount of dust when using cat litter later.

[0058] Specifically, the drying temperature of the mesh belt dryer 16 is 80-140℃, the hot air velocity is 1.5-2m / s, the mesh belt running speed is 0.8-1.2m / min, the drying time is 15-30min, the moisture content of the dried particles is 8-10%, and the moisture evaporation rate is 0.5-0.8kg / (m³). 2 •h).

[0059] like Figure 1 As shown, in a specific embodiment, it also includes a third vibrating screen 18 and a return auger 19. The outlet of the third spiral conveying mechanism 10 is connected to the inlet of the third vibrating screen 18. The oversize discharge pipe of the third vibrating screen 18 is connected to the inlet of the ultrafine pulverizer 7 through the return auger 19. The undersize discharge pipe of the third vibrating screen 18 is connected to the batching unit.

[0060] In this embodiment, specifically, the outlet of the third spiral conveyor 10 is connected to the inlet of the third vibrating screen 18 via a bucket elevator. The granules pulverized by the ultrafine pulverizer 7 pass through the third spiral conveyor 10 and the bucket elevator in sequence to reach the third vibrating screen 18. The particles on the screen of the third vibrating screen 18 are relatively large. This part of the granules passes through the return auger 19 to the ultrafine pulverizer 7 again for further pulverization, thereby ensuring the qualified particle size of the main material used in the batching unit.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A corncob cat litter preparation system, characterized in that, include: The unit consists of a crushing unit, a batching unit, a mixing unit, a granulation unit, and a drying and screening unit connected in sequence. The granulation unit includes a first spiral conveying mechanism and a granulation mechanism. The granulation mechanism includes a first housing, a mounting plate, a ring die, and multiple pressure rollers. The mounting plate is fixedly disposed inside the first housing. The ring die and the multiple pressure rollers are rotatably disposed on the front side of the mounting plate. The multiple pressure rollers are symmetrical about the central axis of the ring die. The ring die and the multiple pressure rollers are respectively connected to a driving mechanism. The circumferential wall of the ring die is evenly distributed with multiple die holes. The lower end of the first housing is provided with a discharge port. The ring die is located directly above the discharge port. The discharge pipe of the first spiral conveying mechanism is connected to the front opening of the ring die.

2. The corncob cat litter preparation system according to claim 1, characterized in that, The driving mechanism includes a primary driving gear, a secondary driving gear, a primary driven gear, a secondary driven gear, and multiple transmission gears. A toothed ring is fixedly installed on the circumference of the ring mold. The primary driving gear and the secondary driving gear are coaxially rotatably disposed on both sides of the mounting plate. The primary driven gear and the secondary driven gear are coaxially rotatably disposed on the rear side of the mounting plate. The primary driving gear meshes with the primary driven gear, and the secondary driving gear meshes with the toothed ring. Each transmission gear is coaxially connected to one of the pressure rollers, and the secondary driven gear meshes with multiple transmission gears.

3. The corncob cat litter preparation system according to claim 1, characterized in that, The crushing unit includes a first crushing mechanism, which includes a hammer mill, a first cyclone separator, a first bag filter, and a second screw conveyor. The hammer mill includes a second housing, a crushing shaft, a screen, and multiple hammers. The crushing shaft is rotatably connected to the opposite side wall of the second housing. The multiple hammers are respectively hinged to the axial side of the crushing shaft. The screen is located below the crushing shaft. The side wall of the second housing below the screen is connected to the tangential inlet of the first cyclone separator through a pipe. The upper outlet of the first cyclone separator is connected to the bag filter. The lower end of the second housing, the lower outlet of the first cyclone separator, and the slag discharge port of the first bag filter are respectively connected to the inlet of the second screw conveyor.

4. The corncob cat litter preparation system according to claim 3, characterized in that, The pulverizing unit further includes a second pulverizing mechanism, which comprises an ultrafine pulverizer, a second cyclone separator, a second bag filter, and a third screw conveying mechanism. The ultrafine pulverizer includes a pulverizing chamber, a pulverizing disc, a toothed ring, a classifying impeller, a flow guide, and a flow divider. The pulverizing disc, the flow divider, the classifying impeller, and the flow guide are coaxially arranged in the pulverizing chamber from bottom to top. The toothed ring is fixedly connected to the inner wall of the pulverizing chamber, and the edges of the toothed ring and the pulverizing disc correspond to each other. The upper exhaust port of the pulverizing chamber is connected to the tangential inlet of the second cyclone separator, the upper outlet of the second cyclone separator is connected to the second bag filter, and the lower outlet of the second cyclone separator and the slag discharge port of the second bag filter are respectively connected to the inlet of the third screw conveying mechanism.

5. The corncob cat litter preparation system according to claim 1, characterized in that, The mixing unit includes a third housing, two arc-shaped plates, and two rotor shafts. The lower end of the third housing is provided with a discharge port. The two arc-shaped plates are rotatably connected to the opposite sides of the discharge port. The lower surface of the arc-shaped plates is hinged to a cylinder structure to control the opening and closing of the two arc-shaped plates. Each rotor shaft is located above one of the arc-shaped plates. The axial side of each rotor shaft is fixedly connected to multiple blades. The included angle between the blade surface and the axial direction of the rotor shaft is between 30° and 45°. The upper end of the third housing is provided with two feed ports for receiving main materials and auxiliary materials, respectively.

6. The corncob cat litter preparation system according to claim 5, characterized in that, The mixing unit also includes an air jet pipe and a liquid spray pipe, which are respectively disposed above the rotor shaft.

7. The corncob cat litter preparation system according to claim 1, characterized in that, The batching unit includes a feeding mechanism and a metering mechanism. The feeding mechanism includes a feeding hopper and a first vibrating screen connected in sequence. The metering mechanism includes a conveying auger, a batching bin, and a batching scale connected in sequence. The undersize discharge pipe of the first vibrating screen and the output pipe of the crushing unit are respectively connected to the conveying auger.

8. The corncob cat litter preparation system according to claim 1, characterized in that, The drying and screening unit includes a mesh belt dryer and a second vibrating screen connected in sequence. The inlet of the mesh belt dryer is connected to the granulation unit, and the discharge pipe of the oversize material of the second vibrating screen is connected to the packaging section.

9. The corncob cat litter preparation system according to claim 4, characterized in that, It also includes a third vibrating screen and a return auger. The outlet of the third spiral conveyor is connected to the inlet of the third vibrating screen. The oversize discharge pipe of the third vibrating screen is connected to the inlet of the ultrafine pulverizer through the return auger. The undersize discharge pipe of the third vibrating screen is connected to the batching unit.

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