Earthworm composting system

Abstract

The present invention discloses an earthworm composting system, which comprises: a composting assembly, which comprises a composting bed, one end of which is provided with a material discharging assembly, and the composting assembly is connected with a support assembly for adjusting the self inclination angle; the screening assembly comprises an inclined screening barrel densely provided with screening holes and a rotating assembly for driving the screening barrel to rotate, and the feeding end of the screening barrel is higher than the discharging end of the screening barrel; the collecting assembly comprises a fixing box which is provided with an opening in the top and is adjacent to the discharging end of the screening barrel to receive the earthworm piles discharged from the discharging end; and the granulation output assembly is used for outputting sludge particles with dry surfaces to the composting bed. The composting device is ingenious in structural design and high in automation degree, sludge particles with dry surfaces are conveyed to the composting bed through the granulation output assembly, the bulkiness of the stacked sludge particles is guaranteed, earthworms can conveniently enter compost, a bulking agent does not need to be used, the composting efficiency is improved, the composting cost is reduced, separation is conducted through the screening assembly after composting is completed, and the composting efficiency is improved. The labor cost is reduced while the burden of workers is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of organic solid waste treatment, and particularly relates to an earthworm composting system. BACKGROUND

[0002] Earthworm composting refers to a composting process in which earthworms are introduced into the organic solid waste treatment technology. The earthworms can utilize their own feeding and burrowing effects and their rich enzyme systems (protease, lipase, cellulase, amylase, etc.) to cooperate with the metabolic effects of microorganisms in the compost to completely decompose and transform the organic waste into easily utilized nutrient substances, thereby accelerating the composting efficiency. In the composting process, the earthworms can also excrete earthworm manure, which is known as the "king of organic fertilizer". The earthworm manure has a high mineralization degree and is rich in various trace elements, has a high agricultural potential, and can be used for soil improvement, plant planting, gas adsorption, etc.

[0003] In the prior art, the earthworm composting generally adds bulking agents or microbial agents to garbage sludge to improve the bulkiness and oxygen content of the sludge, enrich the microbial population structure of the compost, facilitate the earthworms to drill into the sludge for biological treatment, and transform the sludge into earthworm manure, and then process the earthworm manure into fertilizer. However, the above composting method needs to use a large amount of bulking agent, has high cost and complex process, the bulking agent is difficult to be fully mixed with the sludge, the bulkiness of the compost and the properties of the compost are not uniform, the earthworms are not uniformly distributed, artificial stirring is needed to realize uniform mixing, the composting cost is increased, and the composting efficiency cannot be guaranteed. After the composting is completed, the compost and the earthworms also need to be manually screened, which further increases the labor cost and the work burden of workers.

[0004] Therefore, it is necessary to improve the earthworm composting system in the prior art. SUMMARY

[0005] The present application provides an earthworm composting system which reduces the treatment cost, optimizes the composting operation, improves the composting efficiency, improves the earthworm manure screening method, strengthens the composting process monitoring, promotes the composting technology, and can automatically screen to reduce the work burden of workers and reduce the labor cost. The specific technical scheme is as follows:

[0006] An earthworm composting system comprises:

[0007] A composting assembly comprises a composting bed, one end of the composting bed is provided with a material discharging assembly, the composting bed is connected with a supporting assembly for adjusting the inclination angle of the composting bed, and the material discharging assembly and the supporting assembly cooperate to discharge the material after the composting is completed.

[0008] The screening assembly includes an inclined screening cylinder with densely distributed screen holes and a rotating assembly for driving the screening cylinder to rotate. The feed end of the screening cylinder is higher than the discharge end. The compost bed and one end of the discharge assembly away from the compost bed are located inside the feed end of the screening cylinder.

[0009] A collection assembly, the collection assembly including a fixed box with an open top and adjacent to the discharge end of the screening cylinder to receive the earthworm pile discharged from the discharge end;

[0010] A granulation output assembly for outputting surface-dried sludge particles to the compost bed.

[0011] Furthermore, to facilitate material discharge, the material discharge assembly includes a discharge port disposed on the composting bed, a discharge cover for covering the discharge port, and a moving unit for driving the discharge cover to move.

[0012] Furthermore, in order to facilitate the orderly and stable transport of the earthworm pile in the compost bed to the screening cylinder after the discharge port is opened, the discharge assembly also includes a guide chute with the chute opening facing upwards. One end of the guide chute is fixedly connected to the compost bed, and the other end extends to the feed end of the screening cylinder. The length direction of the guide chute and the axis of the screening cylinder are located in the same vertical plane.

[0013] Furthermore, to ensure sufficient composting area in the composting bed, allowing the compost pile to be evenly spread within the bed, thus maintaining the pile's fluffiness while increasing the amount of compost per batch, and facilitating the transport of the pile to the screening cylinder, the guide chute is fixedly connected to the composting bed at one end as the inlet end and the other end as the outlet end. The width of the inlet end and the width of the composting bed are both greater than the width of the outlet end and the inner diameter of the screening cylinder, while the width of the outlet end is smaller than the inner diameter of the screening cylinder. The inlet end gradually transitions to the outlet end.

[0014] Furthermore, in order to ensure that the compost pile is evenly spread within the composting bed during the composting process, and to facilitate the effective, uniform, and stable delivery of materials to the screening cylinder during discharge, the composting bed is connected to a vibration component. The vibration component drives the composting bed to vibrate, so that the compost pile is evenly spread within the composting bed during composting. The vibration component cooperates with the support component and the discharge component to ensure that the discharged materials are orderly and evenly input into the feeding end.

[0015] Furthermore, in order to adjust the tilt angle of the compost bed, the support assembly includes a fixed support leg, a rotating support leg, and an adjustment unit. The fixed support leg and the rotating support leg are respectively located below both ends of the compost bed. The rotating support leg is rotatably arranged around the width direction of the compost bed. The adjustment unit drives the rotating support leg to rotate to adjust the tilt of the compost bed.

[0016] Furthermore, in order to ensure the humidity of the compost bed, improve composting efficiency, and save water, a water receiving trough is provided at the bottom of the compost bed. The water receiving trough is connected to a nozzle that faces downward and towards the compost bed via a water pump. A lifting unit is provided above the compost bed, and a hygrometer is provided at the output end of the lifting unit.

[0017] Furthermore, in order to deliver surface-dried sludge particles to the composting bed, the granulation output assembly includes a conveying assembly and an extrusion molding assembly, a granulation assembly, and an air-drying assembly arranged sequentially. The conveying assembly has a conveying surface horizontally arranged above the side of the composting bed. The extrusion molding assembly is used to extrude the piled sludge into sludge strips and then convey them to the conveying surface. The granulation assembly is used to apply pressure to the sludge on the conveying surface from opposite sides, so that the sludge is stretched and divided into multiple sludge particles. The air-drying assembly includes an air-drying port facing downward and toward the conveying surface and an air pump communicating with the air-drying port.

[0018] Furthermore, in order to compress the piled and moist sludge into sludge strips and convey them to the conveying surface, the extrusion molding assembly includes a screw conveyor, a molding channel, a rotating unit, and a discharge channel. The molding channel and the storage channel both extend along the width direction of the conveying surface and are both located above the conveying surface. The rotating unit drives the molding channel to rotate between a first station and a second station. The molding channel at the first station is connected to the output end of the screw conveyor, and the molding channel at the second station is connected above the discharge channel.

[0019] Furthermore, in order to compress the sludge strip and stretch it to break it into multiple sludge particles, the granulation assembly includes two granulation frames facing each other, granulation rods arranged closely along the width direction of the conveying surface at the bottom of the two granulation frames, and a drive assembly that drives the two granulation rods to move between a separation position and a granulation position. In the granulation position, the granulation rods of the two granulation rods are staggered and in contact with the conveying surface.

[0020] This invention features an ingenious structural design and a high degree of automation. It delivers surface-dried sludge particles to the composting bed through a granulation output component, ensuring the looseness of the sludge particles after accumulation, which facilitates the entry of earthworms into the compost. It eliminates the need for bulking agents, thereby improving composting efficiency and reducing composting costs. After composting is completed, the particles are separated by a screening component, which reduces the workload of workers and lowers labor costs.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 yes Figure 1 Top view;

[0025] Figure 3 yes Figure 1 The main view;

[0026] Figure 4 This is an enlarged view of part A of number 3;

[0027] Figure 5 This is a schematic diagram of the transmission component of the present invention;

[0028] Figure 6 yes Figure 5 An explosion diagram;

[0029] Figure 7 This is a schematic diagram of the structure of the air-drying component of the present invention;

[0030] Figure 8 yes Figure 7 An explosion diagram;

[0031] Figure 9 This is a schematic diagram of the extrusion molding component of the present invention;

[0032] Figure 10 yes Figure 9 Top view;

[0033] Figure 11 yes Figure 10 AA-direction cross section;

[0034] Figure 12 yes Figure 10 BB-direction cross-section;

[0035] Figure 13 yes Figure 9 An explosion diagram;

[0036] Figure 14 This is a schematic diagram of the granulation component of the present invention;

[0037] Figure 15 yes Figure 14 An explosion diagram;

[0038] Figure 16yes Figure 14 Top view omitting the driver component;

[0039] Figure 17 This is a front view of the granulation frame and granulation rod of the present invention;

[0040] Figure 18 This is a schematic diagram of the composting component of the present invention;

[0041] Figure 19 yes Figure 18 The main view;

[0042] Figure 20 yes Figure 18 An explosion diagram;

[0043] Figure 21 This is a partial structural schematic diagram of the composting component of the present invention;

[0044] Figure 22 yes Figure 21 An explosion diagram;

[0045] Figure 23 This is a schematic diagram of the structure of the screening component of the present invention;

[0046] Figure 24 yes Figure 23 An explosion diagram;

[0047] Figure 25 yes Figure 24 Enlarged view of part B;

[0048] Figure 26 This is a schematic diagram of the structure of the separation and collection component of the present invention;

[0049] Figure 27 yes Figure 26 An explosion diagram;

[0050] Figure 28 yes Figure 26 Top view;

[0051] Figure 29 yes Figure 28 CC-direction cross-section;

[0052] In the diagram: 1000, Conveying assembly; 1100, Conveying support; 1200, Side plate; 1300, Connecting frame; 1400, Driving roller; 1500, Driven roller; 1600, Conveying belt; 1700, Conveying motor; 2000, Extrusion molding assembly; 2100, Screw conveyor; 2101, Discharge port; 2110, Horizontal feed tube; 2120, Vertical feed tube; 2130, Hopper; 2140, First spiral blade; 2150, Second spiral blade; 2160, Discharge cover; 2170, Power unit; 2171, First motor; 2172, Driving wheel; 2173, Driven wheel; 2174, Synchronous belt; 2180, Second motor; 2190, Crossbeam; 2200, Sealing cylinder; 2210, Discharge point. Channel; 2300, Forming Shaft; 2310, Forming Through Groove; 2400, Rotating Unit; 3000, Granulation Assembly; 3100, Granulation Frame; 3110, Guide Rod; 3200, Granulation Rod; 3210, First Rod Section; 3220, Second Rod Section; 3230, Third Rod Section; 3300, Drive Assembly; 3310, Fixing Plate; 3320, Drive Cylinder; 3330, Lifting Link; 3340, Rotating Link; 3400, Guide Frame; 3410, Guide Port; 3411, Transition Section; 3412, Granulation Section; 4000, Drying Assembly; 4100, Shell; 4200, Shell Cover; 4210, Drying Port; 4300, Air Pump; 5000, Composting Assembly; 5100, Composting Bed; 5110 5200, Adjusting plate; 5210, Vibration assembly; 5220, Vibrator; 5230, Spring; 5300, Limiting rod; 5300, Support assembly; 5310, Fixed support leg; 5320, Rotating support leg; 5321, Roller; 5330, Synchronizing rod; 5340, Adjusting cylinder; 5350, Transmission connecting rod; 5400, Water receiving tank; 5410, T-pipe; 5411, First valve; 5412, Second valve; 5500, Water pump; 5600, Spray assembly; 5610, Spray head; 5620, Water supply pipe; 5630, Spray pipe; 5700, Lifting unit; 5710, First frame; 5720, First lifting cylinder; 5730, Lifting bar; 5800, Hygrometer; 5900, Discharge assembly; 5 910. Discharge port; 5920. Second lifting cylinder; 5921. Second frame; 5930. Guide chute; 5940. Discharge cover; 6000. Screening assembly; 6100. Screening cylinder; 6110. Screen hole; 6120. Expanding mask; 6200. Rotating assembly; 6210. Rotary motor; 6220. Drive wheel; 6230. Transmission wheel; 6240. Transmission belt; 6250. Transmission shaft; 6260. Transmission gear; 6270. Driven gear ring; 6271. Annular groove; 6300. Manure sludge collection box; 6400. Fixed cylinder; 6500. Collection channel; 7000. Separation and collection assembly; 7100. Fixed box; 7110. First strip opening; 7200. Separation box; 7210. Upper collection box;7211, Sieve plate; 7212, Separation hole; 7213, Second strip-shaped opening; 7220, Lower collection box; 7300, Driving unit; 7310, Driving light; 7311, Light holder; 7312, Baffle; 7320, Heating element. Detailed Implementation

[0053] To better understand the purpose, function, and specific design of this invention, the vermicomposting system of this invention will be described in further detail below with reference to the accompanying drawings.

[0054] like Figures 1-4 As shown, the vermicomposting system of the present invention includes:

[0055] A granulation output component is used to process piles of moist sludge, separating the sludge into multiple surface-dried sludge particles. These particles can then be piled up and used for composting with earthworms. Specifically, the granulation output component includes:

[0056] Transmission component 1000, transmission component 1000 having a horizontal transmission surface;

[0057] The extrusion molding assembly 2000 is used to extrude sludge batch by batch into multiple separated sludge strips and to convey the sludge strips one by one to the conveying surface.

[0058] A granulation component 3000 is disposed between the extrusion molding component 2000 and the output end of the conveying surface. The granulation component 3000 is used to extrude sludge strips on the conveying surface from opposite sides at multiple locations that are interlaced and adjacent to each other, so that the sludge strips are stretched and broken into multiple sludge particles. A drying component 4000 is disposed between the granulation component 3000 and the output end of the conveying surface. The drying component 4000 includes a drying shell, on which are densely distributed drying ports 4210 that communicate with its own inner cavity and face the conveying surface. The drying shell is connected to an air pump 4300, and the input end of the air pump 4300 is connected to the outside. The sludge particles on the conveying surface are dried through the drying ports 4210, so that the surface of the sludge particles is dried, reducing the humidity and stickiness of the sludge particles and ensuring the looseness of the pile formed after the sludge particles are accumulated.

[0059] In addition to the granulation output component, the vermicomposting system of the present invention also includes:

[0060] The composting assembly 5000 includes a composting bed 5100 with an open top and located directly below the output end of the granulation output assembly. The composting bed 5100 is used to receive surface-dried sludge particles discharged from the granulation output assembly. The sludge particles are piled up and earthworms are added for composting. A discharge assembly 5900 is provided at one end of the composting bed 5100. The composting bed 5100 is connected to a vibration assembly 5200 and a support assembly 5300 for adjusting its tilt angle. The discharge assembly 5900 cooperates with the support assembly 5300 to discharge the composted material.

[0061] The screening assembly 6000 includes a screening cylinder 6100 with densely distributed screen holes 6110 on its circumferential outer edge. The screening cylinder 6100 is inclined and connected to a rotating assembly 6200. The rotating assembly 6200 drives the screening cylinder 6100 to rotate around its own axis. The feed end of the screening cylinder 6100 is higher than the discharge end. The higher end of the screening cylinder 6100, that is, the feed end, is sleeved outside the discharge assembly 5900, so that one end of the discharge assembly away from the compost bed 5100 is set inside the feed end of the screening cylinder 6100. A manure collection box 6300 is set directly below the screening cylinder 6100.

[0062] Collection component 7000 is disposed at the lower end of screening cylinder 6100 to receive earthworm and manure piles passing through screening cylinder 6100. Collection component 7000 includes a fixed box 7100 with an open top.

[0063] When the vermicomposting system of the present invention is used, the sludge to be composted is processed by the extrusion molding component 2000. The extrusion molding component 2000 extrudes the sludge to be processed into multiple separated sludge strips in batches. Then, the multiple sludge strips are transferred one by one to the transfer surface. The transfer component 1000 keeps running continuously, so that the multiple sludge strips are distributed at intervals along the length direction of the transfer surface, and move towards the granulation component 3000 under the action of the transfer surface.

[0064] When the sludge strip moves to the granulation component 3000, the granulation component 3000 squeezes and stretches the sludge strip, causing it to be divided into multiple sludge particles after being stretched. The conveying component 1000 continues to operate, conveying the multiple sludge particles to the drying component 4000. In the drying component 4000, external air is introduced into the drying shell by the air pump 4300, and then discharged through the densely distributed drying ports 4210, blowing onto the multiple sludge particles on the conveying surface, so that the surface of the sludge particles is dry, avoiding the increase of adhesion caused by moisture on the surface of the sludge particles, which would make the sludge easily stick together.

[0065] After being dried, the sludge particles are introduced into the composting bed 5100 of the composting assembly 5000. The composting bed 5100 is vibrated by the vibration assembly 5200, ensuring that the sludge particles are evenly distributed within the composting bed 5100. Due to the dryness of the sludge particles, the bulkiness of the resulting sludge pile is significantly increased. Earthworms are then introduced into the composting bed 5100 to compost the loose pile. Compared to existing technologies that require adding a leavening agent and manual mixing, this invention processes the sludge mechanically. The granular sludge particles are air-dried, which significantly reduces the surface moisture while keeping the internal moisture almost unchanged. This ensures that the sludge particles maintain good oxygen-rich conditions after stacking, allowing inoculated earthworms to enter the pile for biological treatment. Since no leavening agents or mixing devices are needed, the cost of composting is greatly reduced. Furthermore, vibration ensures that the piled sludge particles have uniform looseness throughout, eliminating the need for mixing devices. This optimizes the composting process, promotes automation of composting technology, and improves composting efficiency.

[0066] After composting, the material in the compost bed 5100 includes composted sludge, earthworm castings, and earthworms. The discharge assembly 5900 is opened, and the inclination of the compost bed 5100 is adjusted via the support assembly 5300 so that the height of the adjacent end of the compost bed 5100 and the discharge assembly 5900 is less than the height of the other end. The vibration assembly 5200 is then activated, ensuring that the material in the compost bed 5100 enters the downward-sloping screening cylinder 6100 in an orderly and stable manner, preventing excessive material from entering the screening cylinder 6100 and affecting the screening effect. The rotating assembly... The 6200 drives the screening cylinder 6100 to rotate around its own axis, causing small particles such as sludge and earthworm castings to be discharged through the screen holes 6110 to the outside of the screening cylinder 6100 and fall downwards into the manure collection box 6300. Earthworm castings are good decomposed organic fertilizer with high effective nitrogen, phosphorus and potassium content, which can be used for crop production and development to promote agricultural production. The earthworms screened out are discharged from the lower end of the screening cylinder 6100. The earthworms are classified according to their size. The larger earthworms are directly processed into products for sale, while the smaller earthworms continue to participate in composting.

[0067] In this invention, the specific structure of the transmission component 1000 is as follows: Figure 5 and Figure 6As shown, the transmission assembly 1000 includes two transmission supports 1100 arranged along the transmission direction of the transmission surface. The two transmission supports 1100 are generally inverted U-shaped structures. Two side plates 1200 are fixed on the top surface of the transmission supports 1100, which are arranged vertically and side by side along the width direction of the transmission surface. The two side plates 1200 are fixedly connected by a connecting frame 1300. A drive roller 1400 and a driven roller 1500 are arranged side by side in the horizontal direction and rotate around their own axis between the two side plates 1200. The drive roller 1400 is connected to the driven roller 1500 through a horizontal transmission belt 1600. The upper top surface of the transmission belt 1600 constitutes the transmission surface. A transmission motor 1700 that drives the drive roller 1400 to rotate is fixed on one of the side plates 1200. The transmission surface and the two side plates 1200 are combined to form a horizontal transmission groove with the groove opening facing upward. That is, the height dimension of the two side plates 1200 is increased to prevent sludge from falling off the transmission surface during the transmission process.

[0068] A further improvement is that the extrusion molding assembly 2000 includes a screw conveyor 2100, a sealing cylinder 2200, a molding shaft 2300, and a rotating unit 2400. The conveying direction of the screw conveyor 2100, the axis of the sealing cylinder 2200, and the axis of the molding shaft 2300 are parallel to the width direction of the conveying surface. The discharge end of the screw conveyor 2100 is provided with an annular array of discharge ports 2101. The outer circumferential edge of the rotating sleeve is provided with an annular array of molding channels 2310. The inner wall of the molding channels 2310 and the inner wall of the sealing cylinder 2200 enclose each other to form a molding channel. The forming channel abuts against the discharge port 2101. The rotating unit 2400 drives the forming shaft 2300 to rotate around its own axis. The bottom of the sealing cylinder 2200 is provided with a discharge channel 2210 extending along its own axis. The end of the discharge channel 2210 near the forming shaft 2300 is provided with a "trumpet mouth" shaped guide port to facilitate the entry of sludge strips into the discharge channel 2210. The discharge port 2101 is located directly above the transmission surface. The forming channel has two stations. In the first station, the forming channel is connected to the discharge port 2101. In the second station, the forming channel is connected to the bottom of the discharge channel 2210.

[0069] The specific structure of the extrusion molding component 2000 is as follows: Figures 9-13As shown, the rotating unit 2400 drives the forming shaft 2300 to rotate, causing the forming channel to rotate to the first position and connect with the discharge port 2101. After the screw conveyor 2100 transports the sludge, it transports the sludge into the forming channel through the discharge port 2101, causing the sludge to form sludge strips in the forming channel 2310. Then, the rotating unit 2400 drives the forming shaft 2300 to rotate, causing the forming channel to rotate directly below the discharge channel 2210, so that the sludge strips in the forming channel fall onto the conveying surface through the discharge channel 2210. As the conveyor belt 1600 rotates, multiple sludge strips are formed on the conveying surface, spaced apart along the conveying direction. The discharge channel 2210 is fixedly connected to a crossbeam 2190, and both ends of the crossbeam 2190 are fixedly connected to two side plates 1200 respectively.

[0070] More specifically, the screw conveyor 2100 includes a transverse feed pipe 2110 extending parallel to the width direction of the conveying surface, a vertical feed pipe 2120 connected above one end of the transverse feed pipe 2110, a hopper 2130 disposed at the top of the vertical feed pipe 2120, a first spiral blade 2140 rotating about its own axis inside the transverse feed pipe 2110, a second spiral blade 2150 rotating about its own axis inside the vertical feed pipe 2120, and a drive for the first spiral blade 2140 to rotate. The device includes a power unit 2170, a second motor 2180 fixedly mounted on the hopper 2130 with its output end coaxially connected to the second spiral blade 2150, and a discharge cover 2160 located at the other end of the transverse material pipe 2110. Seven discharge ports 2101 are provided and arranged in a circular array on the discharge cover 2160. The angle between the line connecting two adjacent discharge ports 2101 and the center of the discharge cover 2160 is 45 degrees, and the angle between the two lowest discharge ports 2101 is 90 degrees.

[0071] The distance between the end of the discharge port 2101 adjacent to the horizontal material tube 2110 and the axis of the horizontal material tube 2110 is smaller than the distance between the other end and the axis of the horizontal material tube 2110; the power unit 2170 includes a first motor 2171 fixed on the vertical material tube 2120, a drive wheel 2172 coaxially connected to the output end of the first motor 2171, and a driven wheel 2173 fixedly connected to the first spiral blade 2140 coaxially. The drive wheel 2172 is connected to the driven wheel 2173 through a synchronous belt 2174.

[0072] Wet and piled sludge to be composted is continuously added into hopper 2130. The second motor 2180 is started, driving the second spiral blade 2150 to rotate, so that the sludge enters the horizontal material pipe 2110 through the vertical material pipe 2120. At this time, the first motor 2171 is started, driving the drive wheel 2172 to rotate around its own axis. The drive wheel 2172 drives the driven wheel 2173 to rotate through the synchronous belt 2174, so that the first spiral blade 2140 rotates, conveying the sludge material to the discharge cover 2160, so that the discharge outlet 2101 of the discharge cover 2160 outputs sludge.

[0073] Eight forming channels 2310 are arranged in a ring array on the outer edge of the forming shaft 2300. The opening of the forming channel 2310 is directly opposite the inner wall of the sealing cylinder 2200. The rotating unit 2400 is a stepper motor with a step angle of 45°. Each time the stepper motor drives the forming shaft 2300 to rotate, one forming channel rotates from the second station to the first station, so that the sludge strip in the corresponding forming channel 2310 falls into the conveying surface of the conveyor belt 1600, while the remaining forming channels 2310 rotate to the second station. Each time the stepper motor drives the forming shaft 2300 to rotate one revolution, sludge is injected into the forming channel 2310 of the forming shaft 2300 through the screw conveyor 2100, forming sludge strips that are consistent with the width direction of the conveying surface.

[0074] As the conveyor belt 1600 continues to rotate, sludge strips are formed on the conveying surface, arranged side by side along the conveying direction of the conveyor belt 1600. It is understood that the number of discharge ports 2101 and forming channels 2310 can also be other numbers, but the discharge port 2101 is not provided at the lowest position of the discharge cover 2160.

[0075] A further improvement is that the granulation assembly 3000 includes two granulation frames 3100 facing each other. The bottom of the opposite surfaces of the two granulation frames 3100 are provided with granulation rods 3200 closely arranged along the width direction of the conveying surface. The two granulation frames 3100 are symmetrically arranged and the plane of symmetry is perpendicular to the conveying surface. Both granulation frames 3100 are connected to a drive assembly 3300 that drives them to move simultaneously between the separation position and the granulation position. In the separation position, there is a first gap between the two granulation frames 3100 and the conveying surface, and there is a second gap between the granulation rods 3200 on the two granulation frames 3100. In the granulation position, the granulation rods 3200 on the two granulation frames 3100 are all in contact with the conveying surface, and the granulation rods 3200 are arranged alternately in sequence.

[0076] In the separation position, there is a first gap between the granulation frame 3100 and the conveying surface, allowing the sludge strip to pass through and move to the mirror symmetrical plane of the two granulation frames 3100. Then, the drive assembly 3300 drives the two granulation frames 3100 to move to the granulation position, so that the granulation rods 3200 at the bottom of the granulation frame 3100 move from both sides of the sludge strip in opposite directions, acting on the opposite sides of the sludge strip respectively, causing the sludge strip to be squeezed and stretched. Since all the granulation rods 3200 on the two granulation frames 3100 are attached to the conveying surface and are staggered along the width direction of the conveying surface in sequence, the sludge strip between the granulation rods 3200 is torn and divided into multiple sludge particles for air drying.

[0077] A further improvement is that the granulating rod 3200 includes a first rod portion 3210, a second rod portion 3220, and a third rod portion 3230 connected in sequence. The first rod portion 3210 is fixedly connected to the granulating frame 3100 and extends along a length direction parallel to the conveying surface. The third rod portion 3230 is connected to the end of the first rod portion 3210 away from the granulating frame 3100 through the second rod portion 3220. A granulation gap exists between the plane containing the bottom surfaces of the second rod portion 3220 and the first rod portion 3210. The two ends of the third rod portion 3230 are a flared end and a constricted end, respectively. The flared end is fixedly connected to the second rod portion 3220, and the distance between the flared end and the bottom surface of the first rod portion 3210 is greater than the distance between the constricted end and the bottom surface of the first rod portion 3210. The distance between the bottom surfaces of the rod portion 3210 gradually transitions from the flared end to the constricted end; the granulation assembly 3000 includes a guide frame 3400 connected to the transmission assembly 1000, a guide opening 3410 is provided on the guide frame 3400, a guide rod 3110 extending along the width direction of the transmission surface and slidingly engaged with the guide opening 3410 passes through the guide opening 3410, the guide rod 3110 is rotatably connected to the granulation frame 3100, the guide opening 3410 includes a connected transition section 3411 and a granulation section 3412, the granulation section 3412 extends along the length direction parallel to the transmission surface, and the end of the transition section 3411 away from the granulation section 3412 is higher than the other end of the transition section 3411.

[0078] The specific structure of the granulation component 3000 of the present invention is as follows: Figures 14-17As shown, the granulation assembly 3000 includes two vertically arranged plate-shaped guide frames 3400. The two guide frames 3400 are respectively fixed above the two side plates 1200. The guide frames 3400 are provided with two guide openings 3410 distributed along the vertical direction. The guide openings 3410 are formed by connecting an arc-shaped transition section 3411 and a granulation section 3412 extending along the transmission direction of the transmission surface. Two granulation frames 3100 are positioned opposite each other between two guide frames 3400 along the conveying direction of the conveying surface. Each granulation frame 3100 has two guide rods 3110 passing through it. The guide rods 3110 are cylindrical and extend along the conveying direction parallel to the conveying surface. The guide rods 3110 pass through guide openings 3410 and can roll along the guide openings 3410. The drive assembly 3300 includes a fixing plate 3310 fixedly mounted on the two guide frames 3400. Two drive cylinders 3320 are fixed above the fixing plate 3310 and arranged vertically. The piston rods of the two drive cylinders 3320 are... A lifting link 3330 is connected between them, and two rotating links 3340 are hinged to the lifting link 3330. The two rotating links 3340 are respectively hinged to the top of the two granulation frames 3100. The granulation rod 3200 includes a first rod part 3210, a second rod part 3220 and a third rod part 3230 connected in sequence. The first rod part 3210 and the second rod part 3220 both extend along the length direction parallel to the transmission surface. The third rod part 3230 is an upward arc shape, so that the height of the end of the third rod part 3230 connected to the second rod part 3220 is lower than the height of the other end of the third rod part 3230.

[0079] With the above structure, the piston rod of the driving cylinder 3320 drives the lifting connecting rod 3330 to move up and down. The rotating connecting rod 3340 acts on the guide frame 3400, and in conjunction with the guiding action of the guide rod 3110 and the guide opening 3410, the guide frame 3400 and its bottom granulating rod 3200 move in a direction parallel to the guide opening 3410. This causes the granulating frame 3100 to reciprocate between the granulation position and the separation position. Specifically, when the lifting connecting rod 3330 moves upward, the granulating frame 3100 moves from the separation position to the granulation position. Simultaneously, the guide rod 3110 moves from the highest position of the guide opening 3410 to a position where the granulation section 3412 is away from the transition section 3411. When the guide rod 3110 moves to the position where the granulation section 3412 connects with the transition section 3411, both the granulating frame 3100 and the granulating rod 3200 are in contact with the transmission surface, and then guided... Rod 3110 moves along the length of the granulation section 3412 parallel to the conveying surface, causing the granulation rods 3200 on the two granulation frames 3100 to move into an alternating distribution. The granulation rods 3200 approach the sludge strip from both sides. First, the third rod portion 3230 contacts the sludge strip. As the height distance between the third rod portion 3230 and the conveying surface decreases until the bottom surface of the second rod portion 3220 contacts the sludge strip, squeezing the sludge strip and thus extending its length. Then, the part where the second rod portion 3220 and the first rod portion 3210 are connected acts on the sludge strip. The action directions of the second rod portion 3220 and the first rod portion 3210 on both sides are opposite, causing the sludge strip to stretch further until it is torn. Because the granulation rods 3200 on the same granulation frame 3100 are closely arranged and the granulation rods 3200 on the two granulation frames 3100 are alternating, the sludge strip is torn into multiple sludge particles.

[0080] The specific structure of the air drying component 4000 is as follows: Figure 7 and Figure 8 As shown, the drying shell includes a shell 4100 with an open bottom and a shell cover 4200 fixedly installed at the bottom of the shell 4100. The drying ports 4210 are densely distributed on the shell cover 4200. The air pump 4300 is fixed above the shell 4100 and its output end is connected to the inner cavity of the drying shell. The shell cover 4200 is fixedly mounted on two side plates 1200.

[0081] After the sludge strips are broken into multiple sludge particles by squeezing and stretching, the conveying component 1000 continues to operate and moves towards the drying component 4000. In the drying component 4000, the air pump 4300 starts and draws external air into the housing 4100. Then the gas flows out from the drying port 4210 and acts downward on the surface of the sludge particles, accelerating the evaporation of moisture on the surface of the sludge particles. This makes the surface of the sludge particles dry, while the inside still has a certain amount of moisture. Due to the evaporation of moisture on the surface of the sludge particles, the adhesion of the sludge particles is greatly reduced, preventing the sludge particles from sticking together when used for composting beds. This helps to ensure the overall looseness of the sludge after it is laid in the bed.

[0082] After the sludge particles are air-dried, the conveying assembly 1000 transports the surface-dried sludge particles to the composting assembly 5000 for composting to remove harmful substances from the sludge.

[0083] A further improvement is that a water receiving trough 5400 is provided at the bottom of the compost bed 5100, and the water receiving trough 5400 is connected to a spray assembly 5600 via a water pump 5500. The spray assembly 5600 includes nozzles 5610 that are evenly distributed above the compost bed 5100 and pointing downwards. A lifting unit 5700 is provided above the compost bed 5100, and a hygrometer 5800 is provided at the output end of the lifting unit 5700, which is spaced along the length of the compost bed 5100 to detect the humidity of the compost pile inside the compost bed 5100. The discharge assembly 5900 includes a discharge port 5910 provided on the compost bed 5100, a discharge cover 5940 for covering the discharge port 5910, a moving unit for driving the discharge cover 5940 to move up and down, and a guide trough 5930 that communicates with the discharge port 5910 and is fixedly connected to the compost bed 5100 at one end and extends to the higher end of the screening cylinder 6100 at the other end.

[0084] The feed chute 5930 has its opening facing upwards, and its length and the axis of the screening cylinder 6100 are on the same vertical plane. The feed chute 5930 has an inlet and an outlet, respectively. The inlet is fixedly connected to the compost bed 5100, and the outlet is located in the feed end (the higher end) of the screening cylinder 6100. The width of the inlet and the compost bed 5100 are both greater than the width of the outlet and the inner diameter of the screening cylinder 6100, while the width of the outlet is smaller than the inner diameter of the screening cylinder 6100. The feed chute gradually transitions from the inlet to the outlet. This design ensures that the compost bed 5100 has sufficient width and composting space, allowing the compost pile to be evenly distributed within it, increasing the amount of compost per batch and composting efficiency. Simultaneously, the feed chute 5930 allows for the smooth transfer of composted material to the feed end of the screening cylinder 6100.

[0085] Specifically, the composting component 5000 of the present invention has the following structure: Figures 18-22As shown, the compost bed 5100 is elongated, with an adjusting plate 5110 below it. A vibration component 5200 is installed between the adjusting plate 5110 and the compost bed 5100. A support component 5300 is connected to the adjusting plate 5110 to adjust the orientation of the compost bed 5100. When the support component 5300 adjusts the compost bed 5100 to a horizontal position, the length of the compost bed 5100 is consistent. The compost bed 5100 has a trough-shaped structure, with one end located directly below the conveyor belt 1600 and the other end equipped with a discharge component 5900 to discharge the composted sludge, earthworm castings, and earthworms to the screening component 6000. The compost bed 5100 has flanges on both sides with the same length direction. The inner bottom wall of the compost bed 5100 has a porous structure and is fixed with two water receiving troughs 5400 arranged side by side along the width direction of the compost bed 5100 to receive drainage from the bottom of the compost bed 5100.

[0086] The vibration assembly 5200 includes vibrators 5210 arranged in a rectangular array. The housing of the vibrator 5210 is fixedly connected to the adjusting plate 5110. The output end faces upward and is connected to the bottom of the water receiving tank 5400. Springs 5220 are provided between the flanges on both sides of the compost bed 5100 and the adjusting plate 5110. A limiting rod 5230 is provided inside the spring 5220, which passes through the adjusting plate 5110 and is limited and connected to the adjusting plate 5110. A limiting plate is fixed to the bottom of the limiting rod 5230 to prevent the limiting rod 5230 from detaching from the adjusting plate 5110.

[0087] The vibrator 5210 operates, causing the compost bed 5100 to vibrate, thus spreading the sludge particles within the compost bed 5100 evenly, which is the bed-laying work. Under the combined action of the spring 5220 and the limiting rod 5230, the vibrating compost bed 5100 ensures that the sludge particles inside are evenly distributed within the compost bed 5100. Furthermore, since the sludge particles have been air-dried, their surface has a certain degree of dryness, allowing the sludge particles to remain loose after being stacked. After earthworms are introduced into the compost bed 5100, it is convenient for the earthworms to burrow into the sludge particles for composting, thereby ensuring that the earthworms are evenly distributed among the sludge particles and improving composting efficiency.

[0088] To monitor the environmental humidity of the compost pile, lifting units 5700 are installed on both sides of the flange. Each lifting unit 5700 includes a first frame 5710 fixed to the flange and a first lifting cylinder 5720 mounted on the first frame 5710. The piston rod of the first lifting cylinder 5720 points downwards and is fixedly connected to a lifting bar 5730 of the same length as the compost bed 5100. Multiple hygrometers 5800 are evenly spaced below the lifting bar 5730. After the cylinder of the first lifting cylinder 5720 is relatively fixed to the compost bed 5100 using the first frame 5710, the piston rod of the first lifting cylinder 5720 points downwards, driving the hygrometers 5800 to insert into the sludge via the lifting bar 5730 to detect and determine the sludge humidity. If the sludge humidity is too low, it is not conducive to vermicomposting. In this case, water needs to be added to the compost bed 5100.

[0089] A three-way pipe 5410 is fixed at the bottom of the water receiving tank 5400. One end of the three-way pipe 5410 is connected to the water receiving tank 5400 and is equipped with a first valve 5411. The other end is connected to an external water source and is equipped with a second valve 5412. The remaining end is connected to a spray assembly 5600 via a water pump 5500. The spray assembly 5600 includes a water supply pipe 5620 extending along the length of the compost bed 5100 and connected to the output end of the water pump 5500, a spray pipe 5630 connected below the water supply pipe 5620 and evenly distributed along the length of the water supply pipe 5620, and a nozzle 5610 evenly distributed along the length of the spray pipe 5630 and connected below the spray pipe 5630. The nozzle 5610 is located inside the compost bed 5100.

[0090] When replenishing water, first open the second valve 5412 and close the first valve 5411. The water pump 5500 draws external water and delivers it to the nozzle 5610 through the water pipe 5620 and the spray pipe 5630. The nozzle 5610 sprays water downwards to replenish the moisture of the sludge and ensure a suitable humidity environment for composting. Some of the water flows downwards into the water receiving tank 5400. If water needs to be replenished during subsequent composting processes, close the second valve 5412 and open the first valve 5411 so that the water in the water receiving tank 5400 can be sprayed downwards into the compost bed 5100 through the water pump 5500 and the spray assembly 5600.

[0091] After composting is completed, the inclination of the compost bed 5100 needs to be adjusted, and the material in the compost bed 5100 is conveyed to the screening component 6000 through the discharge component 5900 for screening. The discharge component 5900 includes a discharge port 5910 located at the end of the compost bed 5100 away from the transmission surface. The discharge port 5910 is connected to a guide chute 5930. A second frame 5921 is fixed above the compost bed 5100. A second lifting cylinder 5920 is fixedly connected to the cylinder barrel on the second frame 5921. A discharge cover 5940 is fixed to the output end of the second lifting cylinder 5920. The discharge cover 5940 is driven to move up and down by the second lifting cylinder 5920. After the discharge cover 5940 is lowered to the lowest position, the discharge port 5910 is blocked for composting. After the discharge cover 5940 is raised, the discharge port 5910 is opened. After the composting bed 5100 tilts downward, the material enters the screening component 6000 through the guide chute 5930.

[0092] The support assembly 5300 includes two fixed legs 5310 fixed to the lower end of the adjusting plate 5110 near the transmission surface and two rotating legs 5320 rotating to the lower end of the other end of the adjusting plate 5110. The rotation axis of the two rotating legs 5320 is parallel to the width direction of the compost bed 5100. The two rotating legs 5320 are connected to an adjusting unit that drives them to rotate, so as to adjust the tilt direction of the compost bed 5100. Specifically, the adjusting unit 5320 includes an adjusting cylinder 5340, a synchronizing rod 5320 and a transmission connecting rod 5350. The two rotating legs 5320 are connected by the synchronizing rod 5330. The cylinder barrel of the adjusting cylinder 5340 is fixed below the adjusting plate 5110. The piston rod of the adjusting cylinder 5340 is hinged to the synchronizing rod 5330 through the transmission connecting rod 5350. The moving direction of the piston rod is parallel to the length direction of the compost bed 5100. Rollers 5321 are provided at the bottom of the rotating legs 5320. By adjusting the extension and retraction of the piston rod of the hydraulic cylinder 5340, the action is applied to the transmission connecting rod 5350, causing the synchronizing rod 5330 to drive the two rotating support legs 5320 to rotate, thereby adjusting the tilt angle of the compost bed 5100.

[0093] The specific structure of the screening component 6000 is as follows: Figures 23-25 As shown, a fixed cylinder 6400 is fitted over a screening cylinder 6100. An annular material discharge gap is provided between the screening cylinder 6100 and the fixed cylinder 6400. A rotating assembly 6200 is disposed between the fixed cylinder 6400 and the screening cylinder 6100 assembly. A collection channel 6500 is provided at the bottom of the fixed cylinder 6400, extending axially along the fixed cylinder 6400 and communicating with the material discharge gap. The collection channel 6500 is located directly above the manure collection box 6300. Supporting feet are fixed on both sides of the collection channel 6500 to fix and support the fixed cylinder 6400.

[0094] The rotating assembly 6200 includes a rotary motor 6210 disposed on the outer wall of the fixed cylinder 6400. The output end of the rotary motor 6210 is coaxially connected to a drive wheel 6220. The drive wheel 6220 is driven by a drive wheel 6230 via a drive belt 6240. The drive wheel 6230 is coaxially fixedly connected to a drive shaft 6250. The drive shaft 6250 passes through the drive wheel 6230 and rotates around its own axis outside the fixed cylinder 6400. The two ends of the drive shaft 6250 are coaxially fixedly connected to drive gears 6260. The two ends of the screening cylinder 6100 are coaxially fixedly connected to driven gear rings 6270. The two driven gear rings 6270 are provided with annular grooves 6271 coaxially on opposite sides. The two ends of the fixed cylinder 6400 are sealed to the inner walls of the two annular grooves 6271. The end of the screening cylinder 6100 away from the compost bed 5100 is coaxially connected to an expanding mask 6120.

[0095] With the above structure, the fixed cylinder 6400 is fixed in position by the support feet. When screening materials, the rotary motor 6210 starts and drives the drive wheel 6220 to rotate. The drive wheel 6220 drives the transmission wheel 6230 to rotate through the transmission belt 6240. With the transmission shaft 6250 as the transmission component, the transmission gears 6260 at both ends rotate, which in turn drives the driven gear ring 6270 meshing with the transmission gear 6260 to rotate, causing the screening cylinder 6100 to rotate. The screening cylinder 6100 drives the material entering its inner side to rotate, so that small sludge and earthworm castings enter the annular material drop gap through the screen holes 6110, slide down the material drop gap, enter the collection channel 6500 and be discharged downwards, falling into the manure and sludge collection box 6300. Earthworms are discharged from the lower position of the fixed cylinder 6400 through the expanding mask 6120 and enter the collection component 7000.

[0096] In this invention, such as Figures 26-29As shown, the collection assembly 7000 includes a fixed box 7100 with an open top that fits against the lower side of the expanding mask 6120. The fixed box 7100 is fixed to the ground by support legs. A first strip-shaped opening 7110 is provided at the bottom of the side of the fixed box 7100 facing away from the screening cylinder 6100. The first strip-shaped opening 7110 extends along the width direction of the compost bed 5100. A separation box 7200 with an open top is also attached to the side of the fixed box 7100 facing away from the screening cylinder 6100. The separation box 7200 includes an upper collection box 7210 and a lower collection box 7220, both with open tops and stacked together. The bottom of the upper collection box 7210 is densely covered with separation holes 7212. The side wall of the collection box 7210 is provided with a second strip opening 7213 that is the same length direction as the first strip opening 7110 and is connected to it. The fixed box 7100 is provided with a driving unit 7300 that drives earthworms to enter the upper collection box 7210 through the first strip opening 7110 and the second strip opening 7213. The driving unit 7300 includes a driving light 7310 that is fixed directly above the fixed box 7100 and pointing downwards by a light holder 7311 and a heating element 7320 that is fixed to the bottom of the fixed box 7100. A vertical baffle 7312 is also provided on the side of the fixed box 7100 adjacent to the upper collection box 7210. The top of the baffle 7312 is higher than the driving light 7310.

[0097] After the sieved earthworms enter the fixed box 7100, the repellent light 7310 is turned on and the heating element 7320 is activated to control the temperature at the bottom of the fixed box 7100 to below 30 degrees Celsius. Taking advantage of the earthworms' preference for shade and aversion to heat, the earthworms are driven to enter the upper collection box 7210 through the first strip-shaped opening 7110 and the second strip-shaped opening 7213. Through the sieve plate 7211 at the bottom of the upper collection box 7210, smaller earthworms enter the lower collection box 7220 through the separation hole 7212. The larger earthworms in the upper collection box 7210 can be directly processed and sold, while the smaller earthworms in the lower collection box 7220 can continue to participate in composting.

[0098] Furthermore, the upper collection box 7210 has vertically downward insert rods fixed on both sides, and the fixed box 7100 has insert sleeves on both sides that engage with the insert rods. Through the engagement between the insert rods and the insert sleeves, the upper collection box 7210 and the fixed box 7100 can be precisely connected, ensuring that the first strip opening 7110 and the second strip opening 7213 are aligned and connected. The upper collection box 7210 and the fixed box 7100 fit tightly together, and the upper collection box 7210 and the lower collection box 7220 can be easily removed.

[0099] The bottom of the upper collection box 7210 has an inner flange on its outer circumferential edge. A sieve plate 7211 is attached to the inner flange and sealed to the inner circumferential wall of the upper collection box 7210. Separation holes 7212 are densely distributed on the sieve plate 7211. With the above design, the sieve plate 7211 and the upper collection box 7210 can be detachably connected, which makes it easy to replace the sieve plate 7211 to screen earthworms of different sizes.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An earthworm composting system, characterized in that, include: A composting assembly, comprising a composting bed, a discharge assembly at one end of the composting bed, and a support assembly connected to the composting bed for adjusting its tilt angle; the discharge assembly and the support assembly cooperate to discharge the composted material. The screening assembly includes an inclined screening cylinder with densely distributed screen holes and a rotating assembly for driving the screening cylinder to rotate. The feed end of the screening cylinder is higher than the discharge end. The compost bed and one end of the discharge assembly away from the compost bed are located inside the feed end of the screening cylinder. A collection assembly, the collection assembly including a fixed box with an open top and adjacent to the discharge end of the screening cylinder to receive the earthworm pile discharged from the discharge end; A granulation output assembly for outputting surface-dried sludge particles to the compost bed.

2. The vermicomposting system as described in claim 1, characterized in that, The discharge assembly includes a discharge port disposed on the compost bed, a discharge cover for covering the discharge port, and a moving unit for driving the discharge cover to move.

3. The vermicomposting system as described in claim 2, characterized in that, The discharge assembly also includes a guide chute with its opening facing upwards. One end of the guide chute is fixedly connected to the compost bed, and the other end extends to the feed end of the screening cylinder. The length direction of the guide chute and the axis of the screening cylinder are located in the same vertical plane.

4. The vermicomposting system as described in claim 3, characterized in that, The feed chute is fixedly connected to the composting bed at one end as the inlet end and the other end as the outlet end. The width of the inlet end and the width of the composting bed are both greater than the width of the outlet end and the inner diameter of the screening cylinder. The width of the outlet end is smaller than the inner diameter of the screening cylinder. The inlet end is gradually transitioned to the outlet end.

5. The vermicomposting system as described in claim 1, characterized in that, The composting bed is connected to a vibration component, which drives the composting bed to vibrate, so that the compost pile is evenly spread in the composting bed during composting. The vibration component cooperates with the support component and the discharge component to ensure that the discharged material is orderly and evenly fed into the feeding end.

6. The vermicomposting system as described in claim 1, characterized in that, The support assembly includes fixed legs, rotating legs, and an adjustment unit. The fixed legs and rotating legs are respectively located below both ends of the compost bed. The rotating legs are rotatably arranged around the width of the compost bed. The adjustment unit drives the rotating legs to rotate to adjust the inclination of the compost bed.

7. The vermicomposting system as described in claim 1, characterized in that, The composting bed is equipped with a water receiving trough at its bottom, and the water receiving trough is connected to a nozzle that points downward toward the composting bed via a water pump; a lifting unit is installed above the composting bed, and a hygrometer is installed at the output end of the lifting unit.

8. The vermicomposting system as described in claim 1, characterized in that, The granulation output component includes a transmission component and an extrusion molding component, a granulation component, and an air-drying component arranged sequentially. The transmission component has a transmission surface horizontally arranged above the side of the compost bed. The extrusion molding component is used to extrude the piled sludge into sludge strips and then transport them to the transmission surface. The granulation component is used to apply pressure to the sludge on the transmission surface from opposite sides, so that the sludge is stretched and divided into multiple sludge particles. The air-drying component includes an air-drying port facing downward and toward the transmission surface and an air pump communicating with the air-drying port.

9. The vermicomposting system as described in claim 8, characterized in that, The extrusion molding assembly includes a screw conveyor, a molding channel, a rotating unit, and a discharge channel. Both the molding channel and the storage channel extend along the width direction of the transmission surface and are located above the transmission surface. The rotating unit drives the molding channel to rotate between a first station and a second station. The molding channel at the first station is connected to the output end of the screw conveyor, and the molding channel at the second station is connected above the discharge channel.

10. The vermicomposting system as described in claim 8, characterized in that, The granulation assembly includes two granulation frames facing each other, granulation rods arranged closely at the bottom of the two granulation frames along the width of the conveying surface, and a drive assembly that drives the two granulation rods to move between a separation position and a granulation position. In the granulation position, the granulation rods of the two granulation rods are staggered and in contact with the conveying surface.

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