A multi-stage collaborative solid-liquid separation device for pig manure

Abstract

This invention belongs to the field of livestock equipment technology and discloses a multi-stage synergistic solid-liquid separation device for pig manure, including a support frame. A protective component is connected to one end of the support frame. The protective component contains a screening component for separating manure. The protective component includes a shell with an inspection port and a sliding door. The shell contains a screening chamber and a conveying chamber, and a partition plate is provided between the screening chamber and the conveying chamber. By adopting a nested structure of primary, secondary, and tertiary screening cylinders with progressively smaller apertures, a multi-stage screening system of coarse screening, pre-fine screening, and fine screening is formed. A drive component drives the three screening cylinders to rotate synchronously and coaxially to generate centrifugal force. The manure sequentially passes through the primary cylinder to intercept large impurities, the secondary cylinder to filter medium particles, and the tertiary cylinder to intercept tiny particles, achieving precise stratified separation of manure solid and liquid.

Description

Technical Field

[0001] This invention belongs to the field of livestock equipment technology, specifically a multi-stage collaborative solid-liquid separation device for pig manure. Background Technology

[0002] The manure residue separated by current equipment has a high moisture content, many impurities, and contains a large number of fine colloidal particles. It cannot be used directly for composting or organic fertilizer processing. Alternatively, chemical flocculants need to be added, which increases costs and pollutes the manure residue. It can only be treated as waste, wasting the agricultural utilization value of the manure residue.

[0003] Patent application CN201721638600.6 discloses a solid-liquid separation system for animal manure, including a filtration device and a drying device. The filtration device includes a perforated guide frame, a filter disc connected to the perforated guide frame, multiple sprayers located above the perforated guide frame, and a water collection tank located below the perforated guide frame. The perforated guide frame is divided into a front support, a middle support, and a rear support. The front and rear supports are both horizontally arranged, with the former being higher than the latter. The middle support is inclinedly connected to the front and rear supports. Multiple sprayers are located above the front support, and the bottom of the rear support is equipped with a vibrating screen and a vibrator. The animal manure is filtered by the filtration device and then dried by the drying device. This solution separates 80%-90% of the liquid manure mixed in with the solid animal manure through flushing and filtration. The remaining 10%-20% of the liquid manure in the solid animal manure is then evaporated by drying, improving the farm environment and reducing harmful gas emissions.

[0004] Meanwhile, traditional separation equipment is mainly suitable for dry manure cleaning or water flushing processes. For manure from water flushing processes, due to its strong viscosity and small particle size, the separation efficiency is often low, and most equipment cannot effectively remove fine particles, causing the sewage treatment system to be overloaded and affecting the overall environmental benefits of the farm.

[0005] Therefore, in order to solve the above-mentioned technical problems, the present invention provides a multi-stage synergistic solid-liquid separation device for pig farming manure. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems. This invention provides a multi-stage synergistic solid-liquid separation device for pig manure, which has the advantage of high multi-stage screening accuracy.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage synergistic solid-liquid separation device for pig manure, comprising a support frame, a protective component connected to one end of the support frame, a screening component for separating manure inside the protective component, the protective component comprising a shell, an inspection port on the shell, and a movable door slidably provided on the inspection port; The housing is provided with a screening chamber and a conveying chamber, and a partition plate is provided between the screening chamber and the conveying chamber for separation. The screening assembly is located in the screening chamber, and a spiral blade for conveying is connected in the conveying chamber. The screening assembly includes a primary screening cylinder for coarse screening, a secondary screening cylinder for pre-fine screening on the outer periphery of the primary screening cylinder, and a tertiary screening cylinder for fine screening on the outer periphery of the secondary screening cylinder. Each of the primary, secondary, and tertiary screening cylinders is equipped with a plurality of adjustment components for controlling the screening rate.

[0008] Preferably, the screening chamber has a liquid outlet on the side near the support frame, and the conveying chamber has a slag outlet at the end away from the screening chamber for slag output.

[0009] Preferably, the end of the housing away from the spiral blade is connected to a feed box, the end of the feed box away from the housing is connected to a feed inlet for sewage to enter, and the end of the feed box away from the feed inlet is connected to the inside of the primary screening cylinder.

[0010] Preferably, the blade spacing between the spiral blades decreases sequentially along the axial direction, and the blade spacing at the end of the spiral blade closest to the feed box is greater than the blade spacing at the other end.

[0011] Preferably, the support frame is further connected to a control box for receiving data and controlling the operation of the control components, and the screening component is provided with a drive component for providing power. The drive component includes a drive motor, which is connected to the support frame, and a rotating shaft for coaxial rotation of the screening component is connected to one end of the drive motor.

[0012] Preferably, the partition plate is provided with through holes corresponding to the positions of the primary screening cylinder, the secondary screening cylinder and the tertiary screening cylinder, and one end of the partition plate is connected to a drive shaft, and the spiral blade is connected to the outer circumference of the drive shaft.

[0013] Preferably, the screening assembly further includes multiple support rings, which are respectively connected to the primary screening cylinder, the secondary screening cylinder, and the tertiary screening cylinder. A connecting rod is connected between the support rings on the primary screening cylinder, the secondary screening cylinder, and the tertiary screening cylinder, and the support ring on the primary screening cylinder is connected to the rotating shaft through the connecting rod.

[0014] Preferably, the primary screening cylinder includes a stabilizing ring, a torsion section, and an output ring, and the stabilizing ring, the torsion section, and the output ring are all connected by the support ring at their adjacent ends.

[0015] Preferably, the adjusting component includes a rotating shaft rotatably connected to the screening component. An abutment plate is connected to one end of the rotating shaft away from the screening component, and a baffle plate is connected to one end of the abutment plate away from the rotating shaft. The end of the baffle plate near the rotating shaft is arc-shaped, and the arc corresponds to the inner diameter of the screening component.

[0016] Preferably, the portion of the contact plate that does not contact the baffle is provided with a plurality of elastic parts and an elastic plate, the elastic plate being used to protect the elastic parts.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By adopting a nested structure of primary, secondary, and tertiary screening cylinders, with the aperture of each cylinder decreasing progressively, a multi-stage screening system of coarse screening, pre-fine screening, and fine screening is formed. The drive component drives the three screening cylinders to rotate synchronously and coaxially, generating centrifugal force. The fecal waste sequentially passes through the primary cylinder to intercept large impurities, the secondary cylinder to filter medium particles, and the tertiary cylinder to intercept tiny particles, achieving precise stratified separation of fecal waste into solid and liquid phases. At the same time, with the adjustment component on the inner wall of the screening cylinder, the baffle angle can be adjusted according to the concentration of fecal waste to control the residence time of fecal waste, effectively intercepting fine colloidal particles, reducing the solid content of the separated wastewater, preventing fine particles from entering the wastewater treatment system, reducing the load on subsequent treatment, and improving the overall separation accuracy and environmental benefits.

[0018] 2. The spacing between the spiral blades gradually decreases along the axial direction, compressing the residue during transport and squeezing out residual moisture. The separated wastewater flows back to the screening chamber via the inclined inner wall and is then discharged again, significantly reducing the moisture content of the residue. This eliminates the need for additional drying equipment to meet the requirements of organic fertilizer processing. Simultaneously, the reduced volume of the compressed residue facilitates subsequent storage, transportation, and resource utilization. The spiral blades stably push the residue to the discharge port, preventing residue accumulation and blockage, and ensuring continuous and efficient separation operations.

[0019] 3. Adjustment components are evenly installed in each screening cylinder. Through the cooperation of the rotating shaft, the contact plate, and the elastic part, the baffle can be flexibly deflected to change the flow resistance of the sewage and adapt to the viscosity and particle characteristics of sewage from different processes such as water-soaked sewage and water-flushing sewage. The sewage return data is monitored in real time by the flow sensor and transmitted to the control box to adjust the tilt angle of the screening components and the deflection angle of the adjustment components, thereby improving the separation efficiency and operational stability under different working conditions and reducing the cost of manual intervention. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the overall device of the present invention; Figure 2 This is a cross-sectional structural diagram of the overall device of the present invention; Figure 3 This is a schematic diagram of the connection structure between the screening component and the spiral blade of the present invention; Figure 4 This is a three-dimensional structural diagram of the screening component of the present invention; Figure 5 This is a cross-sectional structural diagram of the screening component of the present invention; Figure 6 This is a schematic diagram of the working structure of the primary screening cylinder of the present invention; Figure 7 This is a schematic diagram of the connection structure of the adjustment component of the present invention; Figure 8 This is a three-dimensional structural schematic diagram of the adjustment component of the present invention; Figure 9 This is a cross-sectional structural diagram of the adjustment component of the present invention.

[0021] Figure Descriptions: 1. Support frame; 2. Control box; 3. Drive assembly; 301. Drive motor; 302. Rotating shaft; 303. Drive shaft; 4. Protective assembly; 401. Housing; 4011. Screening chamber; 4012. Leakage port; 4013. Conveying chamber; 4014. Slag outlet; 402. Movable door; 403. Inspection port; 404. Divider plate; 5. Feed inlet; 6. Screening assembly; 601. Primary screening cylinder; 6011. Stabilizing ring; 6012. Torsion part; 6013. Output ring; 602. Secondary screening cylinder; 603. Tertiary screening cylinder; 604. Connecting rod; 605. Support ring; 7. Feed box; 8. Spiral blade; 9. Adjustment assembly; 901. Rotating shaft; 902. Contact plate; 903. Elastic plate; 904. Baffle; 905. Elastic part. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 1 - Figure 9 As shown, this invention discloses a multi-stage synergistic solid-liquid separation device for pig manure, including a support frame 1 for fixed support, a protective component 4 for protecting the components connected to one end of the support frame 1, and a screening component 6 for multi-stage separation of manure and wastewater inside the protective component 4, thereby ensuring that the manure and wastewater can be completely separated and improving the subsequent wastewater purification efficiency. The protective component 4 includes a housing 401 for protection, and an inspection port 403 for inspecting and maintaining the screening component 6 is opened on the housing 401. A movable door 402 for closing the inspection port 403 is slidably provided on the inspection port 403.

[0024] The housing 401 has a screening chamber 4011 for separating fecal waste and a conveying chamber 4013 for moving the residue after wastewater separation. A partition plate 404 for spatial separation is provided between the screening chamber 4011 and the conveying chamber 4013. The edge of the partition plate 404 is connected to the housing 401 to ensure that the wastewater in the screening chamber 4011 does not enter the conveying chamber 4013, thus ensuring the screening efficiency of fecal waste in the screening chamber 4011. The screening component 6 rotates in the screening chamber 4011. A spiral blade 8 for conveying is connected in the conveying chamber 4013. After being screened by the screening component 6, the solid residue passes through the partition plate 404 and enters the conveying chamber 4013. The spiral blade 8 is controlled to rotate to drive the solid residue in the conveying chamber 4013 for conveying, thus preventing the residue from accumulating in the conveying chamber 4013.

[0025] To improve the screening efficiency of the screening component 6 and reduce the solid content in the wastewater after screening, the screening component 6 includes a primary screening cylinder 601 for coarse screening of large impurities, a secondary screening cylinder 602 for pre-fine screening of medium-sized impurities on the outer periphery of the primary screening cylinder 601, and a tertiary screening cylinder 603 for fine screening of small impurities on the outer periphery of the secondary screening cylinder 602. This ensures that the impurity content in the wastewater passing through the screening component 6 will not affect the purification of the wastewater. At the same time, to ensure that the movement rate and screening efficiency of the fecal wastewater in the screening component 6 are controllable, multiple adjusting components 9 for controlling the screening rate are respectively provided in the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603. By changing the position of the adjusting components 9, the screening efficiency of the fecal wastewater can be improved.

[0026] Furthermore, in order to ensure the continuous screening of fecal solids and liquids, a drain port 4012 for conveying the screened wastewater is provided on the side of the screening chamber 4011 near the support frame 1, and a slag outlet 4014 for discharging residue is provided at the end of the conveying chamber 4013 away from the screening chamber 4011.

[0027] Furthermore, in order to ensure that the manure can enter the screening assembly 6 for screening, the end of the housing 401 away from the spiral blade 8 is connected to a feed box 7 for transferring the manure from the outside to the screening chamber 4011. The end of the feed box 7 away from the housing 401 is connected to a feed inlet 5 for the rapid entry of manure, and the end of the feed box 7 away from the feed inlet 5 is connected to the inside of the primary screening cylinder 601.

[0028] During the screening of manure, the manure is introduced into the feed box 7 through the feed inlet 5, and then enters the primary screening cylinder 601 in the screening chamber 4011. Subsequently, the screening component 6 is controlled to rotate, causing the manure mixture to pass through the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603 in sequence, achieving full separation of wastewater and solids. The wastewater falls into the screening chamber 4011 and is then discharged from the screening chamber 4011 through the drain outlet 4012. At the same time, solid impurities move along the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603, causing the solid impurities to pass through the partition plate 404 and enter the conveying chamber 4013. The spiral blade 8 is controlled to rotate, driving the solid impurities to move in the conveying chamber 4013 and causing them to pass through the slag outlet 4014, thus achieving the separation of manure and wastewater, improving the efficiency of wastewater cleaning, and increasing the utilization rate of organic fertilizer.

[0029] Furthermore, in order to compress the volume of solid impurities, reduce the difficulty of subsequent handling of solid impurities, and release any wastewater that may be present inside the solid impurities, the blade spacing between the spiral blades 8 is set to decrease sequentially along the axial direction. That is, the blade spacing at the end of the spiral blade 8 closest to the feed box 7 is greater than the blade spacing at the other end. As the spacing between the blades of the spiral blade 8 shortens, the volume of solid impurities is gradually compressed during their movement on the spiral blade 8, squeezing out the water inside the solid impurities, reducing the wastewater content inside the solid impurities, increasing the compression rate of the impurities, and facilitating the transportation of solid impurities.

[0030] It should be noted that, in order to prevent the sewage generated after the solid impurities are compressed from being discharged through the slag outlet 4014, thereby affecting the separation efficiency of the feces and sewage, the arc surface of the conveying chamber 4013 near the support frame 1 is inclined, and the height of the end near the slag outlet 4014 is higher than that of the end near the partition plate 404, to ensure that sewage will not pass through the slag outlet 4014. At the same time, the partition plate 404 near the support frame 1 is provided with a through groove for sewage in the conveying chamber 4013 to pass through, and under the conveying action of the spiral blade 8, solid impurities will not enter the screening chamber 4011 through the through groove.

[0031] Furthermore, in order to ensure the stable operation of the separation device and the stable rotation of the screening component 6 and the spiral blade 8, a control box 2 for receiving data and controlling the operation of the components is connected to the support frame 1. The screening component 6 is provided with a drive component 3 for providing rotational force. The drive component 3 includes a drive motor 301, which is connected to the support frame 1. One end of the drive motor 301 is connected to a rotating shaft 302 for coaxial rotation of the screening component 6. The drive motor 301 drives the rotating shaft 302 to rotate, thereby driving the screening component 6 to rotate, ensuring stable separation efficiency of manure and sewage.

[0032] Furthermore, in order to ensure that solid impurities can enter the conveying chamber 4013 after being screened by the screening component 6, through holes corresponding to the positions of the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603 are respectively opened on the partition plate 404, so that the separated solid impurities can pass through the through holes and enter the conveying chamber 4013. One end of the partition plate 404 is rotatably connected to the drive shaft 303, and the spiral blade 8 is connected to the outer circumference of the drive shaft 303. At the same time, the end of the drive shaft 303 is connected to the rotating shaft 302, and the rotating shaft 302 drives the drive shaft 303 to rotate, thereby realizing the rotation of the spiral blade 8.

[0033] Furthermore, to ensure that the screening assembly 6 can rotate with the rotating shaft 302, and to ensure that solid impurities can move normally within the screening assembly 6 without accumulation, the screening assembly 6 also includes multiple support rings 605 to improve its support strength. These support rings 605 are respectively connected to the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603, thereby improving its support strength and reducing the probability of deformation of the screening assembly 6 during the screening of manure. The primary screening cylinder 601 and the secondary screening cylinder 602 are connected to... A connecting rod 604 is connected between the support ring 605 on the primary screening cylinder 601 and the secondary screening cylinder 602. The connecting rod 604 ensures that the screening assembly 6 can complete the coaxial rotation requirement. At the same time, the support ring 605 on the primary screening cylinder 601 is connected to the rotating shaft 302 through the connecting rod 604. Thus, when the rotating shaft 302 rotates, it drives the connecting rod 604 to rotate, which in turn drives the primary screening cylinder 601, the secondary screening cylinder 602 and the tertiary screening cylinder 603 to rotate synchronously. This reduces the number of power sources required and improves the operational stability of the device.

[0034] It should be noted that the length of the connecting rod 604 can be adjusted according to the actual screening situation, that is, the connecting rod 604 is composed of a rod with a telescopic structure.

[0035] Depend on Figure 6 - Figure 7As shown, since the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603 have the same structural composition, in order to clarify the connection composition of the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603, the structure of the primary screening cylinder 601 is taken as an example. The primary screening cylinder 601 includes a stabilizing ring 6011, a twisting part 6012, and an output ring 6013. The twisting part 6012 is located between the stabilizing ring 6011 and the output ring 6013. The adjacent ends of the stabilizing ring 6011, the twisting part 6012, and the output ring 6013 are all connected by a support ring 605, thereby ensuring the stability of the connection between them. By controlling the extension length of the connecting rod 604, the deflection angle of the twisting part 6012 is adjusted, changing the conveying rate of the manure in the screening assembly 6, so as to achieve full screening of the manure and reduce the residual amount of sewage.

[0036] Furthermore, to ensure that the residence time of the manure in the screening assembly 6 can fully meet the screening requirements of the screening assembly 6, the adjusting assembly 9 includes a rotating shaft 901 for changing the connection angle of the adjusting assembly 9 on the screening assembly 6. The rotating shaft 901 is rotatably connected to the screening assembly 6, meaning that the adjusting assembly 9 is evenly distributed on the inner ring walls of the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603. For the sake of simplicity, the screening assembly 6 is used in place of the primary screening cylinder 601, the secondary screening cylinder 602, and the tertiary screening cylinder 603. The end of the rotating shaft 901 away from the screening assembly 6 is connected to an abutment plate 902 that is highly fitted to the arc-shaped surface. The end of the contact plate 902 away from the rotating shaft 901 is connected to a baffle 904 for guiding or inhibiting the movement of feces. The end of the baffle 904 near the rotating shaft 901 is arc-shaped to ensure that the baffle 904 will not collide with the screening component 6 during the angle adjustment process. The arc corresponds to the inner diameter of the screening component 6. When the movement rate of feces in the screening component 6 is fast, the rotating shaft 901 is controlled to drive the contact plate 902 and the baffle 904 to rotate, changing the angle between the baffle 904 and the axis of the screening component 6, increasing or decreasing the contact surface between the baffle 904 and the moving feces, thereby adjusting the residence time of feces in the screening component 6.

[0037] It should be noted that during the rotation of the rotating shaft 901, the contact plate 902 is always in contact with the inner arc surface of the screening component 6, thereby preventing fecal matter from passing through the gap between the baffle 904 and the screening component 6 and affecting the adjustment force of the adjustment component 9.

[0038] Furthermore, in order to ensure that the contact plate 902 and the screening component 6 can always maintain a contact state, the part of the contact plate 902 that does not contact the baffle 904 is provided with multiple elastic parts 905 and elastic plates 903. The elastic parts 905 are used to maintain the fit between the contact plate 902 and the screening component 6, ensuring that the feces will not pass through the gap between the contact plate 902 and the screening component 6. The elastic plates 903 are used to protect the elastic parts 905, thereby ensuring that there is no gap between the contact plate 902 and the baffle 904.

[0039] Meanwhile, in order to improve the screening efficiency of the screening component 6 and the adjustment of the adjustment component 9, a flow sensor for identifying the sewage content is installed on the through groove of the partition plate 404. This sensor is used to detect the sewage content flowing back from the conveying chamber 4013 to the screening chamber 4011. The flow sensor is connected to the intelligent control module in the control box 2 and interacts with it to control the tilt angle of the screening component 6 and the rotation angle of the adjustment component 9 according to the flow sensor, so as to ensure the full separation of feces and sewage.

[0040] Specifically, the flow sensor is electrically connected to the data acquisition module in the control box 2, and can detect the instantaneous flow rate, cumulative flow rate, flow velocity and solids content-related flow signals of the sewage flowing back from the conveying chamber 4013 to the screening chamber 4011 in real time and continuously. The detection data is uploaded to the intelligent control module in real time.

[0041] The intelligent control module pre-sets four types of flow thresholds: low backflow, normal backflow, high backflow, and abnormal backflow, and uses a backflow duration of not less than 20 to 30 seconds as a valid judgment condition.

[0042] When the return sewage flow rate is lower than the preset lower limit threshold and lasts for no less than 30 seconds, it is judged as a low return condition, indicating that the sewage screening is too fast, the residence time is insufficient, and fine particles are easy to pass through. The intelligent control module automatically increases the overall tilt angle of the screening component 6 by 5° to 15°, that is, the side closer to the conveying chamber 4013 is higher than the other side, extending the residence time. At the same time, the baffle 904 of the adjustment component 9 is controlled to deflect 15° to 30° towards the axis of the screening cylinder. Specifically, the adjustment component 9 in the first-stage screening cylinder 601 deflects 20° to 30°, the adjustment component 9 in the second-stage screening cylinder 602 deflects 15° to 25°, and the adjustment component 9 in the third-stage screening cylinder 603 deflects 15° to 20°, increasing the flow resistance of sewage and enhancing the interception effect of fine particles.

[0043] When the return sewage flow rate is within the preset upper and lower limit threshold range and the flow rate fluctuation does not exceed ±10%, it is judged as a normal return condition, indicating that the screening rate and separation accuracy are in the optimal balance state. The intelligent control module maintains the current tilt angle and rotation speed of the screening component 6 constant, and keeps the primary screening cylinder 601, secondary screening cylinder 602 and tertiary screening cylinder 603 working stably and in tandem. At the same time, it controls the baffle 904 of the adjustment component 9 to maintain an intermediate deflection angle of 5° to 15°. Specifically, the adjustment component 9 in the primary screening cylinder 601 deflects 5° to 10°, the adjustment component 9 in the secondary screening cylinder 602 deflects 8° to 12°, and the adjustment component 9 in the tertiary screening cylinder 603 deflects 10° to 15°, taking into account both the smooth flow of sewage and the effective screening residence time. Only when the flow rate fluctuates slightly, the tilt angle of the screening component 6 and the angle of the baffle 904 are slightly adjusted by ±2° and ±3°, respectively.

[0044] When the flow rate of the backflow sewage exceeds the preset upper limit threshold and lasts for no less than 20 seconds, it is determined to be a high backflow condition, indicating that the screening of feces and sewage is too slow and solid residue is easy to accumulate and leak. The intelligent control module automatically reduces the overall tilt angle of the screening component 6 by 5° to 15°, forming a tilt angle on the side closer to the conveying chamber 4013 that is lower than the other side, in order to shorten the flow path of feces and sewage and accelerate the conveying speed of solid residue. At the same time, the baffle 904 of the regulating component 9 is controlled to deflect towards the cylinder wall to 0° to 5°. The regulating component 9 in the first-stage screening cylinder 601 and the second-stage screening cylinder 602 is completely retracted, and the regulating component 9 in the third-stage screening cylinder 603 is deflected by 3° to 5°, reducing the flow resistance of feces and sewage, quickly pushing solid residue to the through hole of the partition plate 404, and reducing sewage backflow.

[0045] When the flow rate changes by at least 50% or there is no backflow for at least 5 seconds, it is determined to be an abnormal backflow condition, indicating that there is material jamming in the screen or abnormal feeding. The intelligent control module immediately controls the screening component 6 to perform a short-term low-speed reverse rotation, using reverse centrifugal force to loosen the solid stuck in the screen. After the reverse rotation ends, the screening component 6 is controlled to resume forward medium-high speed operation. The adjustment component 9 first maintains a low resistance state of 0° to 5° for rapid material discharge. After the flow rate returns to normal, it automatically returns to the working angle of the corresponding working condition. If the abnormal state continues, an alarm is triggered.

[0046] During operation, the manure is first introduced into the feed box 7 through the feed inlet 5. The feed box 7 smoothly transports the manure to the first-stage screening cylinder 601 in the screening chamber 401 of the housing 401 of the protective component 4, completing the feeding of the manure. At this time, the drive motor 301 starts, driving the rotating shaft 302 to rotate coaxially. The rotating shaft 302 is fixedly connected to the support ring 605 of the first-stage screening cylinder 601 in the screening component 6 through the connecting rod 604, thereby driving the first-stage screening cylinder 601, the second-stage screening cylinder 602, and the third-stage screening cylinder 603 to rotate synchronously and coaxially, forming centrifugal screening power. At the same time, the rotating shaft 302 is connected to the drive shaft 303 on the partition plate 404. The drive shaft 303 drives the spiral blade 8 in the conveying chamber 4013 to rotate synchronously, realizing the power supply for conveying the solid residue after screening. The screening component 6 and the spiral blade 8 share a set of drive power, which simplifies the device structure, reduces energy consumption, and ensures the synchronous operation of each rotating part, avoiding component wear or reduction in separation efficiency caused by asynchronous power.

[0047] Furthermore, the screening component 6 adopts a three-layer nested screening cylinder structure, consisting of a primary screening cylinder 601, a secondary screening cylinder 602, and a tertiary screening cylinder 603 from the inside out. The aperture of each of the three cylinders decreases progressively, forming a multi-stage collaborative screening system of coarse screening, pre-fine screening, and fine screening.

[0048] Under the centrifugal force of the primary screening cylinder 601, large solid impurities are trapped, while liquid and small to medium-sized particulate impurities pass through the screen holes of the primary screening cylinder 601 into the secondary screening cylinder 602. The secondary screening cylinder 602 traps medium-sized particulate impurities, and the liquid and tiny particulate impurities further pass through the screen holes into the tertiary screening cylinder 603. The tertiary screening cylinder 603 completes the fine screening of tiny particulate impurities, and the finally separated wastewater falls through the screen holes of the tertiary screening cylinder 603 to the bottom of the screening chamber 4011, and is discharged through the drain outlet 4012 on the side wall of the screening chamber 4011, achieving efficient separation of wastewater.

[0049] Each screening cylinder is composed of a stabilizing ring 6011, a torsion part 6012, and an output ring 6013, which are spliced ​​together by a support ring 605. The support ring 605 cooperates with the connecting rod 604 to greatly improve the structural strength of the screening cylinder, avoid deformation due to the impact of manure or centrifugal force during the rotation screening process, and ensure the stability of the screening operation. At the same time, the torsion part 6012 can change the deflection angle by adjusting the length of the connecting rod 604, which helps to control the conveying rate of manure in the screening cylinder.

[0050] Solid impurities intercepted by the three-stage screening cylinder 603 are pushed by the rotation of the screening cylinder and enter the conveying chamber 4013 inside the housing 401 through the through holes on the partition plate 404 corresponding to the positions of each screening cylinder. The blade spacing of the spiral blade 8 in the conveying chamber 4013 decreases axially from the feed box 7 end to the slag outlet 4014 end. During the rotation and conveying process of the spiral blade 8, the solid impurities are gradually compressed as the blade spacing gradually decreases. On the one hand, the small amount of residual sewage inside the solid impurities can be further squeezed and separated. The separated sewage flows back to the screening chamber 4011 along the inclined inner wall of the conveying chamber 4013 and is then discharged through the drain port 4012, further reducing the moisture content of the solid residue. On the other hand, it can reduce the volume of the solid residue, which is convenient for subsequent storage, transportation and organic fertilizer processing. The compressed solid impurities are finally discharged through the slag outlet 4014 at the end of the conveying chamber 4013, completing the conveying and compression operation of the solid residue.

[0051] Furthermore, the inspection port 403 on the housing 401, in conjunction with the sliding movable door 402, can be quickly opened when the device is stopped to inspect and clean the screening components 6 in the screening chamber 4011 and the spiral blades 8 in the conveying chamber 4013, ensuring the long-term stable operation of the device.

[0052] To accommodate the screening requirements of fecal waste with varying concentrations and impurity contents, multiple adjusting components 9 are evenly arranged on the inner wall of each screening cylinder. Each adjusting component 9 is rotatably connected to the inner wall of the screening cylinder via a rotating shaft 901. An abutment plate 902 is fixed to the end of the rotating shaft 901, and the abutment plate 902 is connected to an arc-shaped baffle 904. An elastic part 905 and an elastic plate 903 are provided between the abutment plate 902 and the inner wall of the screening cylinder. The elastic part 905 continuously provides elastic force to ensure that the abutment plate 902 always adheres to the inner wall of the screening cylinder, preventing fecal waste leakage from the gaps. The elastic plate 903 protects the elastic part 905, preventing fecal waste from corroding or clogging the elastic structure. The adjusting component 9 can drive the baffle 904 to deflect via the rotating shaft 901, changing the angle between the baffle 904 and the axis of the screening cylinder, thereby adjusting the flow resistance and residence time of the fecal waste within the screening cylinder. When the concentration of fecal waste is high and the impurity particles are fine, the deflection angle of the baffle 904 is increased to prolong the residence time of the fecal waste and enhance the interception effect of fine impurities. When the concentration of fecal waste is low and the impurity particles are coarse, the deflection angle of the baffle 904 is decreased to accelerate the flow rate of the fecal waste and prevent impurities from accumulating and clogging the screen holes.

[0053] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage synergistic solid-liquid separation device for pig manure, comprising a support frame (1), characterized in that: A protective component (4) is connected to one end of the support frame (1). The protective component (4) is provided with a screening component (6) for separating fecal waste. The protective component (4) includes a housing (401). An inspection port (403) is provided on the housing (401). A movable door (402) is slidably provided on the inspection port (403). The housing (401) is provided with a screening chamber (4011) and a conveying chamber (4013) respectively. A partition plate (404) is provided between the screening chamber (4011) and the conveying chamber (4013) for separation. The screening component (6) is located in the screening chamber (4011). A spiral blade (8) for conveying is connected in the conveying chamber (4013). The screening assembly (6) includes a primary screening cylinder (601) for coarse screening, a secondary screening cylinder (602) for pre-fine screening on the outer periphery of the primary screening cylinder (601), and a tertiary screening cylinder (603) for fine screening on the outer periphery of the secondary screening cylinder (602). The primary screening cylinder (601), the secondary screening cylinder (602), and the tertiary screening cylinder (603) are each provided with a plurality of regulating components (9) for controlling the screening rate.

2. The multi-stage synergistic solid-liquid separation device for pig manure as described in claim 1, characterized in that: The screening chamber (4011) has a drain outlet (4012) on the side near the support frame (1), and the conveying chamber (4013) has a slag outlet (4014) for slag output on the end away from the screening chamber (4011).

3. The multi-stage synergistic solid-liquid separation device for pig manure as described in claim 1, characterized in that: The end of the housing (401) away from the spiral blade (8) is connected to a feed box (7), the end of the feed box (7) away from the housing (401) is connected to a feed inlet (5) for the entry of manure, and the end of the feed box (7) away from the feed inlet (5) is connected to the inside of the primary screening cylinder (601).

4. The multi-stage synergistic solid-liquid separation device for pig manure as described in claim 3, characterized in that: The blade spacing between the spiral blades (8) decreases sequentially along the axial direction, and the blade spacing at one end of the spiral blade (8) closest to the feed box (7) is greater than the blade spacing at the other end.

5. A multi-stage synergistic solid-liquid separation device for pig manure according to claim 1, characterized in that: The support frame (1) is also connected to a control box (2) for receiving data and controlling the operation of the components, and the screening component (6) is provided with a drive component (3) for providing power. The drive component (3) includes a drive motor (301), which is connected to the support frame (1). One end of the drive motor (301) is connected to a rotating shaft (302) for coaxial rotation of the screening component (6).

6. The multi-stage synergistic solid-liquid separation device for pig manure according to claim 4, characterized in that: The partition plate (404) has through holes corresponding to the positions of the first-stage screening cylinder (601), the second-stage screening cylinder (602) and the third-stage screening cylinder (603), and one end of the partition plate (404) is connected to a drive shaft (303), and the spiral blade (8) is connected to the outer circumference of the drive shaft (303).

7. A multi-stage synergistic solid-liquid separation device for pig manure according to claim 5, characterized in that: The screening assembly (6) further includes multiple support rings (605), which are respectively connected to the primary screening cylinder (601), the secondary screening cylinder (602), and the tertiary screening cylinder (603). A connecting rod (604) is connected between the support rings (605) on the primary screening cylinder (601), the secondary screening cylinder (602), and the tertiary screening cylinder (603). Meanwhile, the support ring (605) on the primary screening cylinder (601) is connected to the rotating shaft (302) through the connecting rod (604).

8. A multi-stage synergistic solid-liquid separation device for pig manure according to claim 7, characterized in that: The primary screening cylinder (601) includes a stabilizing ring (6011), a twisting part (6012), and an output ring (6013). The adjacent ends of the stabilizing ring (6011), the twisting part (6012), and the output ring (6013) are all connected by the support ring (605).

9. A multi-stage synergistic solid-liquid separation device for pig manure as described in claim 1, characterized in that: The adjusting component (9) includes a rotating shaft (901) which is rotatably connected to the screening component (6). A contact plate (902) is connected to one end of the rotating shaft (901) away from the screening component (6). A baffle (904) is connected to one end of the contact plate (902) away from the rotating shaft (901). The end of the baffle (904) near the rotating shaft (901) is arc-shaped, and the arc corresponds to the inner diameter of the screening component (6).

10. A multi-stage synergistic solid-liquid separation device for pig manure according to claim 9, characterized in that: The portion of the contact plate (902) that does not contact the baffle (904) is provided with a plurality of elastic parts (905) and an elastic plate (903), the elastic plate (903) being used to protect the elastic parts (905).

Images