Double-screw extrusion type solid-liquid separator and application thereof

Abstract

The application discloses a double-spiral extrusion type solid-liquid separator and application, and the separator comprises a base, a separation assembly and a pretreatment assembly; the separation assembly comprises a separation cylinder arranged on the base, two extrusion spirals rotatably connected in the separation cylinder, a screen cylinder arranged in the separation cylinder and located outside the extrusion spirals, and a driving motor arranged at a higher end of the separation cylinder and providing power for the two extrusion spirals; the pretreatment assembly comprises a buffer cylinder arranged on the base, a conical barrier screen arranged in the buffer cylinder, a stirrer rotatably connected in the buffer cylinder, and a mixing motor providing power for the stirrer; the application has a reasonable structure design; by arranging two extrusion spirals with opposite rotating directions in the separation cylinder, sliding and falling of livestock and poultry manure on the extrusion spirals can be avoided, and the conveying efficiency of the livestock and poultry manure is effectively improved; and meanwhile, under the cooperation of the screen cylinder, extrusion and dewatering treatment of the livestock and poultry manure is realized.

Description

Technical Field

[0001] This invention relates to the field of livestock and poultry manure treatment technology, specifically to a double-screw extrusion solid-liquid separator and its application. Background Technology

[0002] Solid-liquid separation is a step in the treatment of livestock and poultry manure. Currently, there are three main types of solid-liquid separation equipment for livestock and poultry manure: screen separators, centrifugal separators, and filter press separators. The commonly used screw extrusion solid-liquid separator is a type of filter press separator. However, the existing screw extrusion solid-liquid separator has poor separation effect, the separated solids have too high moisture content, and the solids are easily polluted by being thrown out of the discharge port, which cannot meet the requirements of production. Furthermore, the existing screw extrusion solid-liquid separator is not suitable for the treatment of various types of livestock and poultry manure, and its applicability is low. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a twin-screw extrusion solid-liquid separator and its application.

[0004] The technical solution of the present invention is: a double-screw extrusion solid-liquid separator, comprising a base, a separation component disposed on the base, and a pretreatment component disposed on the base and communicating with the separation component; The separation assembly includes a separation cylinder inclinedly mounted on the upper surface of a base via a support, two extrusion screws rotatably engaged inside the separation cylinder, a screen cylinder sleeved inside the separation cylinder and located outside the extrusion screws, and a drive motor located at the higher end of the separation cylinder that simultaneously powers the two extrusion screws. An end cap is movably connected to the lower end of the separation cylinder, and an equipment box is connected to the higher end of the separation cylinder. A discharge port is provided at the connection between the equipment box and the separation cylinder. A partition plate is provided inside the equipment box, and a pressure plate is slidably engaged inside the equipment box at a position corresponding to the discharge port via a guide rod. A compression spring is sleeved on the guide rod and abuts against the pressure plate. A discharge trough is provided at the lower end of the outer wall of the equipment box. A drain pipe is provided at the lower end of the outer wall of the separation cylinder. The extrusion screw includes a rotating shaft rotatably engaged inside the separation cylinder and passing through the partition plate, and spiral blades sleeved outside the rotating shaft. Cutting teeth are provided at the outer edge of the spiral blades. The pretreatment assembly includes a buffer cylinder mounted on a base, a conical barrier mesh located at the lower part of the buffer cylinder, a stirrer rotatably engaged inside the buffer cylinder, and a mixing motor located at the top of the buffer cylinder that provides power to the stirrer; a feed pipe is provided at the upper end of the outer wall of the buffer cylinder, a transfer pipe connected to the separation cylinder is provided at the lower end of the outer wall of the buffer cylinder, and an exhaust pipe is provided at the top of the buffer cylinder.

[0005] Furthermore, the diameters of the two helical blades decrease sequentially along their height direction, and the two helical blades are arranged in an intersecting configuration; Explanation: When livestock and poultry manure moves between the two spiral blades, the squeezing force of the spiral blades gradually increases, which is beneficial to improving the squeezing and dehydration effect of livestock and poultry manure; while the spiral blades arranged in a cross pattern can remove the manure that is stuck together, reducing the rotational resistance of the spiral blades.

[0006] Furthermore, both ends of the screen cylinder are movably connected to buffer seats that are connected to the end cap and the equipment box respectively, and a retaining ring is fitted on the outer wall of the screen cylinder; a vibration motor is installed at the upper end of the outer wall of the separation cylinder, and the output end of the vibration motor passes through the separation cylinder and abuts against the retaining ring. Explanation: The high-frequency vibration generated by the vibrating motor is transmitted to the surface of the screen cylinder through the retaining ring, causing the screen cylinder to vibrate back and forth inside the separation cylinder. This allows the feces and dirt clogging the screen holes to fall off, improving the reliability of the screen cylinder.

[0007] Furthermore, the ends of both rotating shafts are connected to meshing first bevel gears; the drive motor is located at the top of the equipment box, and the output end of the drive motor is connected to a second bevel gear that meshes with either of the first bevel gears; Explanation: Since the two first bevel gears mesh with each other, the two rotating shafts rotate in opposite directions; at this time, the second bevel gear is driven to rotate by the drive motor, and the two rotating shafts rotate in opposite directions by the meshing action of the second bevel gear with either of the first bevel gears.

[0008] Furthermore, the guide rod is hollow inside, and an adjusting plate that slidably engages with the guide rod and abuts against the compression spring is provided on the guide rod. A linkage ring is provided at the top of the equipment box, and a top rod that penetrates the equipment box and is connected to the adjusting plate is provided on the linkage ring. An adjusting screw that is rotatably engaged with the upper end face of the equipment box is threaded onto the linkage ring. Note: Adjusting the screw and adjusting the pressure of the adjusting plate on the discharge hole can further improve the dehydration effect of livestock and poultry manure.

[0009] Furthermore, the rotating shaft is hollow inside and is made up of several short shafts connected by threads, and the helical blades are movably connected to the outside of the rotating shaft by bolts; Note: By setting an internally hollow rotating shaft, the energy consumption of the equipment can be reduced; and by setting a split rotating shaft and helical blades, it is easy to replace the rotating shaft and helical blades, thus reducing the maintenance cost of the equipment.

[0010] Furthermore, the agitator includes a stirring shaft and several mixing plates equidistantly distributed around the stirring shaft, each mixing plate having a flow channel extending through it; Explanation: The mixing plate is rotated by the stirring shaft, and the livestock and poultry manure can continuously flow through the flow groove on the mixing plate, thereby improving the texture uniformity of the livestock and poultry manure and creating stable conditions for solid-liquid separation treatment of livestock and poultry manure.

[0011] Furthermore, a cutting blade is fitted on the stirring shaft and above the mixing plate, and a receiving plate is fitted inside the buffer cylinder and located below the cutting blade. The receiving plate abuts against the cutting blade and has several discharge holes evenly distributed on it. Explanation: After livestock and poultry manure enters the buffer cylinder, it is first cut and crushed by the cutting disc; at the same time, the rotation of the cutting disc can push the material accumulated on the receiving tray to prevent the receiving tray from becoming blocked.

[0012] Furthermore, a wedge-shaped guide seat is provided at the bottom of the buffer cylinder; Note: By setting a wedge-shaped guide seat, it is easy for the material at the bottom of the buffer cylinder to be discharged quickly.

[0013] The present invention also provides an application of a twin-screw extrusion solid-liquid separator, which is applied to the solid-liquid separation treatment of livestock and poultry manure based on the above-mentioned twin-screw extrusion solid-liquid separator.

[0014] The working principle of this invention is as follows: In operation, livestock and poultry manure is fed into the buffer cylinder through the feed pipe. A mixing motor drives the stirring shaft to rotate, which in turn drives the mixing plate and the cutting disc to rotate simultaneously. The cutting disc and the receiving disc work together to cut and crush large particles in the manure. The mixing plate agitates the manure located above the conical barrier screen, filtering out large particles and achieving primary separation. The pre-treated manure then enters the separation cylinder through the transfer pipe. A drive motor drives two extrusion screws to rotate simultaneously. Under the extrusion action of the screw blades and the screen cylinder, water is squeezed out and discharged through the drain pipe. The manure after solid-liquid separation rises along the extrusion screws, passes through the discharge hole, and pushes the pressure plate along the guide rod. Finally, the separated manure is discharged through the discharge chute.

[0015] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects: First, the present invention has a reasonable structural design. By setting two extrusion screws with opposite rotation directions inside the separation cylinder, it can prevent livestock and poultry manure from sliding and falling off on the extrusion screws, thus effectively improving the conveying efficiency of livestock and poultry manure. At the same time, with the cooperation of the screen cylinder, the extrusion and dewatering treatment of livestock and poultry manure is realized. Secondly, by setting an adjustable pressure plate inside the equipment box, the pressure at the discharge hole can be adjusted as needed, thereby controlling the dryness and moisture content of livestock and poultry manure after solid-liquid separation and realizing the reduction treatment of livestock and poultry manure. Third, the diameters of the two spiral blades of the present invention decrease sequentially along their height direction, and the two spiral blades are arranged in a crisscross pattern; this causes the pressure on the livestock and poultry manure to gradually increase as it moves between the two spiral blades, which is beneficial to improving the dehydration effect of the livestock and poultry manure; at the same time, the two spiral blades can remove material from each other, which can prevent the equipment from becoming clogged. Attached Figure Description

[0016] Figure 1 This is a longitudinal sectional view of the solid-liquid separator of the present invention; Figure 2 This is a front view of the solid-liquid separator of the present invention; Figure 3 This is a top view of the solid-liquid separator of the present invention; Figure 4 This is a schematic diagram of the extrusion screw of the present invention; Figure 5 This is a diagram showing the distribution of the extrusion screw of the present invention inside the separation cylinder; Figure 6 This is a schematic diagram showing the connection between the rotating shaft and the equipment housing of the present invention; Figure 7 This is a schematic diagram of the pretreatment component of the present invention; Figure 8 This is a schematic diagram showing the connection between the cutting disc and the receiving disc of the present invention; Among them, 1-base, 2-separation component, 20-separation cylinder, 200-support, 201-end cover, 202-drainage pipe, 21-extrusion screw, 210-rotating shaft, 2100-short shaft, 211-spiral blade, 212-first bevel gear, 22-screen cylinder, 220-buffer seat, 221-retaining ring, 23-drive motor, 230-second bevel gear, 24-equipment box, 240-discharge hole, 241-partition plate, 242-guide rod, 2420-compression spring, 243-pressure... Plate, 244-Discharge chute, 245-Adjusting plate, 246-Linkage ring, 2460-Top rod, 2461-Adjusting screw, 25-Vibration motor, 3-Pretreatment component, 30-Buffer cylinder, 300-Feed pipe, 301-Transfer pipe, 302-Exhaust pipe, 303-Wedge guide seat, 31-Conical barrier net, 32-Agitator, 320-Agitator shaft, 321-Mixing plate, 3210-Flow channel, 33-Mixing motor, 34-Cutting disc, 35-Receiving tray, 350-Discharge hole. Detailed Implementation

[0017] Example 1 like Figure 1 , 2 The double-screw extrusion solid-liquid separator shown includes a base 1, a separation component 2 disposed on the base 1, and a pretreatment component 3 disposed on the base 1 and communicating with the separation component 2. like Figure 1 , 2 As shown in Figures 3, 5, and 6, the separation assembly 2 includes a separation cylinder 20 inclinedly mounted on the upper surface of the base 1 via a support 200, two extrusion screws 21 respectively rotatably engaged inside the separation cylinder 20, a screen cylinder 22 sleeved inside the separation cylinder 20 and located outside the extrusion screws 21, and a drive motor 23 located at the higher end of the separation cylinder 20 and simultaneously providing power to the two extrusion screws 21; an end cap 201 is movably connected to the lower end of the separation cylinder 20, and an equipment box 24 is connected to the higher end of the separation cylinder 20. A discharge hole 240 is provided at the connection between the equipment box 24 and the separation cylinder 20. A partition plate 241 is provided inside the equipment box 24. A pressure plate 243 is slidably engaged inside the equipment box 24 and at a position corresponding to the position of the discharge hole 240 via a guide rod 242. A screen cylinder 22 is sleeved on the guide rod 242. A compression spring 2420 abuts against the pressure plate 243; a discharge chute 244 is provided at the lower end of the outer wall of the equipment box 24; a drain pipe 202 is provided at the lower end of the outer wall of the separation cylinder 20; the extrusion screw 21 includes a rotating shaft 210 that is rotatably engaged inside the separation cylinder 20 and passes through the partition plate 241 and a spiral blade 211 sleeved outside the rotating shaft 210, with cutting teeth provided at the outer edge of the spiral blade 211; the diameter of the two spiral blades 211 decreases sequentially along their height direction, and the two spiral blades 211 are arranged in a crisscross pattern; the ends of the two rotating shafts 210 are each connected to a first bevel gear 212 that meshes with each other; the drive motor 23 is located at the top of the equipment box 24, and the output end of the drive motor 23 is connected to a second bevel gear 230 that meshes with any of the first bevel gears 212; like Figure 3 , 7 As shown, the pretreatment component 3 includes a buffer cylinder 30 mounted on the base 1, a conical barrier net 31 located at the lower part of the buffer cylinder 30, a stirrer 32 rotatably engaged inside the buffer cylinder 30, and a mixing motor 33 located at the top of the buffer cylinder 30 and providing power to the stirrer 32; a feed pipe 300 is provided at the upper end of the outer wall of the buffer cylinder 30, a transfer pipe 301 communicating with the separation cylinder 20 is provided at the lower end of the outer wall of the buffer cylinder 30, and an exhaust pipe 302 is provided at the top of the buffer cylinder 30; the stirrer 32 includes a stirring shaft 320 and four mixing plates 321 equidistantly distributed around the stirring shaft 320, and each mixing plate 321 is provided with a flow groove 3210.

[0018] Example 2 The difference between this embodiment and Embodiment 1 is that: like Figure 1 , 2As shown, both ends of the screen cylinder 22 are movably connected to buffer seats 220 that are respectively connected to end caps 201 and equipment boxes 24. A retaining ring 221 is fitted on the outer wall of the screen cylinder 22. A vibration motor 25 is provided at the upper end of the outer wall of the separation cylinder 20. The output end of the vibration motor 25 passes through the separation cylinder 20 and abuts against the retaining ring 221. The high-frequency vibration generated by the vibration motor 25 is transmitted to the surface of the screen cylinder 22 through the retaining ring 221, so that the screen cylinder 22 vibrates back and forth inside the separation cylinder 20, thereby causing the fecal matter blocked in the screen holes of the screen cylinder 22 to fall off and improving the reliability of the screen cylinder 22.

[0019] Example 3 The difference between this embodiment and Embodiment 2 is that: like Figure 3 , 6 As shown, the guide rod 242 is hollow inside, and an adjusting plate 245 that slidably engages with the compression spring 2420 is attached to the guide rod 242. A linkage ring 246 is provided at the top of the equipment box 24, and a top rod 2460 that penetrates the equipment box 24 and is connected to the adjusting plate 245 is provided on the linkage ring 246. An adjusting screw 2461 that is rotatably engaged with the upper end face of the equipment box 24 is threaded onto the linkage ring 246. By adjusting the adjusting screw 2461, the squeezing pressure of the adjusting plate 245 on the discharge hole 240 can be adjusted, which can further improve the dehydration effect of livestock and poultry manure.

[0020] Example 4 The difference between this embodiment and Embodiment 3 is that: like Figure 4 As shown, the rotating shaft 210 is hollow inside and is composed of four short shafts 2100 threaded together. The helical blade 211 is movably connected to the outside of the rotating shaft 210 by bolts. By setting the rotating shaft 210 to be hollow inside, the energy consumption of the equipment can be reduced. Furthermore, the separate rotating shaft 210 and helical blade 211 facilitate the replacement of the rotating shaft 210 and the helical blade 211, thereby reducing the maintenance cost of the equipment.

[0021] Example 5 The difference between this embodiment and embodiment 4 is that: like Figure 7 , 8 As shown, a cutting disc 34 is fitted on the stirring shaft 320 and above the mixing plate 321. A receiving disc 35 is fitted inside the buffer cylinder 30 and is located outside the stirring shaft 320 and below the cutting disc 34. The receiving disc 35 abuts against the cutting disc 34, and six discharge holes 350 are evenly distributed on the receiving disc 35. After the livestock and poultry manure enters the buffer cylinder 30, it is first cut and crushed by the cutting disc 34. At the same time, the cutting disc 34 can push the material accumulated on the receiving disc 35 during rotation, so as to prevent the receiving disc 35 from becoming blocked.

[0022] Example 6 The difference between this embodiment and embodiment 5 is that: like Figure 7 As shown, a wedge-shaped guide seat 303 is provided at the bottom of the buffer cylinder 30; by providing the wedge-shaped guide seat 303, it is easy for the material at the bottom of the buffer cylinder 30 to be discharged quickly.

[0023] Example 7 This embodiment describes the application of a twin-screw extrusion solid-liquid separator, based on any one of the twin-screw extrusion solid-liquid separators described in Embodiments 1-6, and applies it to the solid-liquid separation treatment of livestock and poultry manure.

[0024] It should be noted that the drive motor 23, vibration motor 25 and hybrid motor 33 used in this invention all adopt existing technologies and are not specifically limited here. Those skilled in the art can select the corresponding products according to actual needs.

Claims

1. A double-screw extrusion solid-liquid separator, characterized in that, It includes a base (1), a separation component (2) disposed on the base (1), and a pretreatment component (3) disposed on the base (1) and communicating with the separation component (2); The separation assembly (2) includes a separation cylinder (20) inclinedly mounted on the upper surface of the base (1) via a support (200), two extrusion screws (21) respectively rotatably engaged inside the separation cylinder (20), a screen cylinder (22) sleeved inside the separation cylinder (20) and located outside the extrusion screws (21), and a drive motor (23) located at the higher end of the separation cylinder (20) and simultaneously providing power to the two extrusion screws (21); an end cap (201) is movably connected to the lower end of the separation cylinder (20), and an equipment box (24) is connected to the higher end of the separation cylinder (20). A discharge hole (240) is provided at the connection between the equipment box (24) and the separation cylinder (20). 4) An internal partition plate (241) is provided. Inside the equipment box (24) and at the position corresponding to the discharge hole (240), a pressure plate (243) is slidably engaged with the pressure plate (243) via a guide rod (242). A compression spring (2420) is sleeved on the guide rod (242) and abuts against the pressure plate (243). A discharge trough (244) is provided at the lower end of the outer wall of the equipment box (24). A drain pipe (202) is provided at the lower end of the outer wall of the separation cylinder (20). The extrusion screw (21) includes a rotating shaft (210) that is rotatably engaged inside the separation cylinder (20) and passes through the partition plate (241) and a spiral blade (211) sleeved outside the rotating shaft (210). Cutting teeth are provided at the outer edge of the spiral blade (211). The pretreatment component (3) includes a buffer cylinder (30) set on the base (1), a conical barrier net (31) set at the lower position inside the buffer cylinder (30), a stirrer (32) rotatably clamped inside the buffer cylinder (30), and a mixing motor (33) set at the top of the buffer cylinder (30) and providing power to the stirrer (32); a feed pipe (300) is provided at the upper end of the outer wall of the buffer cylinder (30), a transfer pipe (301) connected to the separation cylinder (20) is provided at the lower end of the outer wall of the buffer cylinder (30), and an exhaust pipe (302) is provided at the top of the buffer cylinder (30).

2. The double-screw extrusion solid-liquid separator according to claim 1, characterized in that, The diameters of the two helical blades (211) decrease sequentially along their height direction, and the two helical blades (211) are arranged in an intersecting configuration.

3. The double-screw extrusion solid-liquid separator according to claim 1, characterized in that, Both ends of the screen cylinder (22) are movably connected to buffer seats (220) that are connected to end caps (201) and equipment boxes (24) respectively. A retaining ring (221) is fitted on the outer wall of the screen cylinder (22). A vibration motor (25) is provided on the upper end of the outer wall of the separation cylinder (20). The output end of the vibration motor (25) passes through the separation cylinder (20) and abuts against the retaining ring (221).

4. A twin-screw extrusion solid-liquid separator according to claim 1, characterized in that, The ends of the two rotating shafts (210) are each connected to a first bevel gear (212) that meshes with each other; the drive motor (23) is located at the top of the equipment box (24), and the output end of the drive motor (23) is connected to a second bevel gear (230) that meshes with any of the first bevel gears (212).

5. A twin-screw extrusion solid-liquid separator according to claim 1, characterized in that, The guide rod (242) is hollow inside. An adjusting plate (245) that abuts against the compression spring (2420) is slidably engaged on the guide rod (242). A linkage ring (246) is provided at the top of the equipment box (24). A top rod (2460) that penetrates the equipment box (24) and is connected to the adjusting plate (245) is provided on the linkage ring (246). An adjusting screw (2461) that is rotatably engaged with the upper end face of the equipment box (24) is threaded onto the linkage ring (246).

6. A twin-screw extrusion solid-liquid separator according to claim 1, characterized in that, The rotating shaft (210) is hollow inside and is formed by threaded connection of several short shafts (2100). The spiral blade (211) is movably connected to the outside of the rotating shaft (210) by bolts.

7. A twin-screw extrusion solid-liquid separator according to claim 1, characterized in that, The stirrer (32) includes a stirring shaft (320) and several mixing plates (321) equidistantly distributed around the stirring shaft (320), and each mixing plate (321) is provided with a flow groove (3210).

8. A double-screw extrusion solid-liquid separator according to claim 7, characterized in that, A cutting disc (34) is fitted on the stirring shaft (320) and above the mixing plate (321). A receiving disc (35) is fitted inside the buffer cylinder (30) and is located outside the stirring shaft (320) and below the cutting disc (34). The receiving disc (35) abuts against the cutting disc (34), and several dropping holes (350) are evenly distributed on the receiving disc (35).

9. The application of a twin-screw extrusion solid-liquid separator according to any one of claims 1 to 8, characterized in that, It was applied to the solid-liquid separation treatment of livestock and poultry manure.

10. A twin-screw extrusion solid-liquid separator according to claim 9, characterized in that, The rotating shaft (210) is formed by threaded connection of several short shafts (2100), and the helical blade (211) is movably connected to the outside of the rotating shaft (210) by bolts.

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