System for preparing liquid organic manure

Abstract

The application provides a preparation system of liquid organic fertilizer, which comprises a cracking kettle, a discharge buffer device, a feeding device, a multi-stage solid-liquid separation device, a membrane separation device, a clear liquid storage device and a concentration adjusting device; the cracking kettle is used for cracking raw materials, and a discharge port of the cracking kettle is vertically above a feeding position of the discharge buffer device; the discharge buffer device is used for buffering materials output from the cracking kettle, and the materials output from the discharge buffer device are conveyed to the multi-stage solid-liquid separation device through the feeding device; liquid-phase materials output from the multi-stage solid-liquid separation device are conveyed to the membrane separation device, and solid-phase materials are output; clear liquid output from the membrane separation device is conveyed to the clear liquid storage device, and concentrated liquid output from the membrane separation device is conveyed to the concentration adjusting device; the concentration adjusting device is used for adjusting the concentration of the concentrated liquid and then outputting a liquid organic fertilizer product; and a discharge port of the clear liquid storage device is communicated to a feeding port of the cracking kettle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of organic fertilizer preparation, and particularly relates to a preparation system of liquid organic fertilizer. BACKGROUND

[0002] The raw material of the hydrothermal cracking method for preparing organic fertilizer is straw, branches and manure, and the product is solid organic fertilizer and liquid organic fertilizer. The liquid organic fertilizer needs to be subjected to deep solid-liquid separation because the solid content is required to be less than 0.5% for drip irrigation. The hydrothermal cracking is carried out under high pressure, and a large amount of colloid is generated after the raw material is cracked, so that the solid-liquid separation is very difficult. In addition, the introduction of external water has a great influence on the solid content of the liquid organic fertilizer product. Therefore, how to ensure the solid content of the liquid organic fertilizer is very critical, and the above problems need to be solved urgently. SUMMARY

[0003] In order to solve the problems in the background art, the present application provides a preparation system of liquid organic fertilizer, which comprises a cracking kettle, a discharge buffer device, a material conveying device, a multi-stage solid-liquid separation device, a membrane separation device, a clear liquid storage device and a concentration adjusting device. The cracking kettle is used for cracking raw materials, and the discharge port of the cracking kettle is located vertically above the feeding position of the discharge buffer device. The discharge buffer device is used for buffering the material output from the cracking kettle, and the material output from the discharge buffer device is conveyed to the multi-stage solid-liquid separation device through the material conveying device. The liquid phase material output from the multi-stage solid-liquid separation device is conveyed to the membrane separation device, and the solid phase material is output. The clear liquid output from the membrane separation device is conveyed to the clear liquid storage device, and the concentrated liquid output from the membrane separation device is conveyed to the concentration adjusting device. The concentration adjusting device is used for adjusting the concentration of the concentrated liquid and then outputting the liquid organic fertilizer product. The discharge port of the clear liquid storage device is connected to the feeding port of the cracking kettle.

[0004] In the preparation system of liquid organic fertilizer of the present application, the discharge buffer device comprises a plurality of side walls. The plurality of side walls enclose a buffer space in the shape of an inverted truncated cone. The top of the buffer space is a feeding port, and the bottom is a discharge port. The feeding port is located vertically below the discharge port of the cracking kettle. At least one of the plurality of side walls is a variable-angle side wall. Based on the variable angle of the variable-angle side wall, the size of the feeding port is variable, and the size of the discharge port is constant.

[0005] In the preparation system of liquid organic fertilizer of the present application, the variable-angle side wall comprises a side wall plate and an elastic expansion piece. The side wall plate and the side wall enclose a buffer space. One end of the elastic expansion piece is a hinged fixed end, and the other end is hinged to the side wall plate. The elastic expansion piece performs expansion and contraction action based on the change in the weight of the material supported by the side wall plate.

[0006] In the preparation system of the liquid organic fertilizer, the elastic telescopic part comprises a telescopic sleeve and a telescopic spring; one end of the telescopic spring is a hinged fixed end, and the other end is hinged to the side wall plate; the telescopic sleeve is sleeved on the telescopic spring and can telescope with the telescopic spring to limit the deformation direction of the telescopic spring.

[0007] In the preparation system of the liquid organic fertilizer, the side wall comprises two variable-angle side walls and two fixed side walls arranged oppositely; the variable-angle side walls and the fixed side walls are alternately arranged to enclose the buffer space; the fixed side walls are arranged in parallel; and the variable-angle side walls are rotatably arranged at the bottom side of the fixed side walls.

[0008] In the preparation system of the liquid organic fertilizer, the horizontal part of the material conveying device is arranged in the discharge port.

[0009] In the preparation system of the liquid organic fertilizer, the multi-stage solid-liquid separation device comprises a spiral extruder, a horizontal spiral extruder, a high-speed centrifuge and a vibrating screen; the material conveyed through the material conveying device sequentially passes through the spiral extruder, the horizontal spiral extruder, the high-speed centrifuge and the vibrating screen; and the liquid phase separated by the vibrating screen is conveyed to the membrane separation device.

[0010] In the preparation system of the liquid organic fertilizer, the number of the vibrating screens is 2, and the vibrating screens are arranged in series.

[0011] In the preparation system of the liquid organic fertilizer, the concentration adjusting device comprises a chelating tank and a canning machine; the concentrated liquid output by the membrane separation device is conveyed to the chelating tank and the canning machine; and the material output by the chelating tank is conveyed to the canning machine.

[0012] In the preparation system of the liquid organic fertilizer, three sections of pipe coils are sequentially arranged from top to bottom in the cracking kettle, and each pipe coil is controlled respectively.

[0013] The preparation system of the liquid organic fertilizer has the following beneficial effects: the preparation system of the liquid organic fertilizer buffers the discharge of the cracking kettle based on the discharge buffer device, stabilizes the amount of material conveyed to the multi-stage solid-liquid separation device through the material conveying device, thereby ensuring the separation effect of the multi-stage solid-liquid separation device; the multi-stage solid-liquid separation device can effectively remove water from the material after cracking, thereby reducing the solid content of the liquid organic fertilizer product and meeting the drip irrigation requirement; and the material of the clear liquid storage device is recycled, thereby avoiding the influence of external water source on the solid content of the liquid organic fertilizer product, and further ensuring that the solid content of the liquid organic fertilizer product meets the drip irrigation requirement. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1is a flow chart of the preparation system of the liquid organic fertilizer of the present application;

[0015] Figure 2 is a structural schematic diagram of the discharge buffer device of the preparation system of the liquid organic fertilizer of the present application;

[0016] Figure 3 is a structural schematic diagram of the elastic telescopic member of the preparation system of the liquid organic fertilizer of the present application;

[0017] Figure 4 is a structural schematic diagram of the preparation system of the liquid organic fertilizer of the present application; Figure 2 is a top view.

[0018] Figure legend: 1. Cracking kettle; 2. Discharge buffer device; 21. Side wall; 211. Variable angle side wall; 212. Fixed side wall; 2111. Side wall plate; 2112. Elastic telescopic member; 21121. Telescopic sleeve; 211211. First sleeve; 211212. Second sleeve; 21122. Telescopic spring; 22. Buffer space; 221. Inlet; 222. Outlet; 3. Conveying device; 4. Multistage solid-liquid separation device; 41. Screw extruder; 42. Horizontal screw extruder; 43. High-speed centrifuge; 44. Vibrating screen; 5. Membrane separation device; 6. Clear liquid storage device; 7. Concentration adjusting device; 71. Chelating tank; 72. Filling machine; 8. Buffer tank; 9. Discharge pump. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "comprise" and variations thereof as used in the specification and claims of this application and in the accompanying drawings are intended to cover not exclusive inclusion.

[0021] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in

[0022] A system for preparing liquid organic fertilizer according to the application is described in detail below with reference to the accompanying drawings, as shown in Figure 1 The system includes a cracking kettle 1, a discharge buffer device 2 (such as a buffer tank or other structure capable of achieving a buffering effect), a feeding device 3 (such as a scraper conveyor, model MC50 or other existing equipment), a multi-stage solid-liquid separation device 4, a membrane separation device 5 (such as model MD20 or other existing equipment), a clear liquid storage device 6, and a concentration adjustment device 7. The cracking kettle 1 is used for cracking raw materials, and the discharge port of the cracking kettle 1 is vertically above the feeding position of the discharge buffer device 2. The discharge buffer device 2 is used to buffer the material output by the cracking kettle 1, and the material output by the discharge buffer device 2 is conveyed to the multi-stage solid-liquid separation device 4 via the feeding device 3. The liquid-phase material output by the multi-stage solid-liquid separation device 4 is conveyed to the membrane separation device 5, and the solid-phase material is output externally. The clear liquid output by the membrane separation device 5 is conveyed to the clear liquid storage device 6, and the concentrated liquid output by the membrane separation device 5 is conveyed to the concentration adjustment device 7. The concentration adjustment device 7 is used to output the liquid organic fertilizer product after adjusting the concentration of the concentrated liquid. The discharge port of the clear liquid storage device 6 is connected to the feeding port of the cracking kettle 1.

[0023] The system for preparing liquid organic fertilizer according to the application buffers the discharge of the cracking kettle based on the discharge buffer device (the cracking kettle is operated intermittently), stabilizes the amount of material conveyed to the multi-stage solid-liquid separation device via the feeding device, thereby ensuring the separation effect of the multi-stage solid-liquid separation device. The multi-stage solid-liquid separation device can effectively remove the water in the material after cracking, thereby reducing the solid content of the liquid organic fertilizer product and meeting the drip irrigation requirements. The material in the clear liquid storage device is recycled to avoid the introduction of external water sources affecting the solid content of the liquid organic fertilizer product, thereby further ensuring that the solid content of the liquid organic fertilizer product meets the drip irrigation requirements.

[0024] In some embodiments, as Figure 2 , 3As shown in Figure 4, the discharge buffer device 2 includes multiple sidewalls 21; the multiple sidewalls 21 form an inverted frustum-shaped buffer space 22; the top of the buffer space 22 is a feed inlet 221, and the bottom is a discharge outlet 222, with the feed inlet 221 located vertically below the discharge outlet of the pyrolysis reactor 1; at least one of the multiple sidewalls 21 includes a variable angle sidewall 211; based on the variable angle sidewall 211, the size of the feed inlet 221 is variable, while the size of the discharge outlet 222 remains constant; based on the setting of the variable angle sidewall 211, the volume of the buffer space 22 is variable to cope with the change in the discharge amount of the pyrolysis reactor 1. When the discharge amount increases, the material presses on the variable angle sidewall 211, causing it to rotate in the horizontal direction, thereby changing the angle and expanding the volume of the buffer space 22. At this time, since the angle between the variable angle sidewall 211 and the horizontal direction becomes smaller, the volume of the buffer space 22 increases; when the discharge amount decreases, the variable angle sidewall 211 rotates in the opposite direction, increasing the angle with the horizontal direction to ensure complete discharge.

[0025] Specifically, the variable angle sidewall 211 includes a sidewall plate 2111 and an elastic telescopic member 2112; a buffer space 22 is formed by the sidewall plate 2111 and the sidewall 21; one end of the elastic telescopic member 2112 is a hinged fixed end, and the other end is hinged to the sidewall plate 2111. The elastic telescopic member 2112 performs telescopic movements based on the weight change of the material supported by the sidewall plate 2111; the elastic telescopic member 2112 includes a telescopic sleeve 21121 and a telescopic spring 21122; one end of the telescopic spring 21122 is a hinged fixed end, and the other end is hinged to the sidewall plate 2111; the telescopic sleeve 21121 is sleeved on the telescopic spring 21122 and can extend and retract with the extension and retraction of the telescopic spring 21122 to limit the deformation direction of the telescopic spring 21122. The telescopic sleeve 21121 includes a first sleeve 211211 and a second sleeve 211212; the first sleeve 211211 and the second sleeve 211212 are sleeved together and can slide together; the ends of the first sleeve 211211 and the second sleeve 211212 respectively limit the telescopic spring 21122; based on the cooperation of the telescopic sleeve 21121 and the telescopic spring 21122, the deformation direction of the telescopic spring 21122 is along the telescopic direction of the telescopic sleeve 21121, ensuring the support effect on the side wall plate 2111; specifically, the elastic telescopic component 2112 can be selected as a constant force spring.

[0026] In some embodiments, such as Figure 2 and 4 As shown, the sidewall 21 includes two variable-angle sidewalls 211 and two fixed sidewalls 212 arranged opposite to each other; the variable-angle sidewalls 211 and the fixed sidewalls 212 are alternately arranged to form a buffer space 22; the fixed sidewalls 212 are arranged in parallel; the bottom side of the variable-angle sidewalls 211 is rotatably arranged on the fixed sidewalls 212 to form an inverted quadrangular pyramid-shaped buffer space 22.

[0027] In some embodiments, as shown in Figure 1 The multi-stage solid-liquid separation device 4 includes a screw extruder 41 (such as a model CZLY-400), a horizontal screw extruder 42 (such as a model GNLW224EP-VFD), a high-speed centrifuge 43 (such as a model HSS310), and a vibrating screen 44 (such as a model XBS-1000), which can also be selected from commercially available products suitable for the material of the present application. The material transported by the material conveying device 3 is sequentially subjected to the screw extruder 41, the horizontal screw extruder 42, the high-speed centrifuge 43, and the vibrating screen 44. The liquid phase separated by the vibrating screen 44 is transported to the membrane separation device 5. The screw extruder 41 removes most of the solids in the material, the horizontal screw extruder 42 removes large particles in the suspension, and the high-speed centrifuge 43 (vertical) removes small particles in the liquid, which can be effectively removed in combination. Preferably, the number of vibrating screens 44 is 2, and they are arranged in series. The backwash liquid of the high-speed centrifuge 43 can use the clear liquid output by the clear liquid storage device 6.

[0028] Preferably, the solid-phase material output by the screw extruder 41 is discharged or transported to the feed inlet of the screw extruder 41 for re-dewatering, further reducing the input of external moisture; the solid-phase material of the horizontal screw extruder 42, the high-speed centrifuge 43, and the vibrating screen 44 is discharged and dried for sale as solid organic fertilizer.

[0029] In some embodiments, as shown in Figure 1 The liquid organic fertilizer preparation system further includes a buffer tank 8, and the discharge buffer device 2 is arranged in the buffer tank 8, and the discharge port 222 of the discharge buffer device 2 has a certain height and is in contact with the bottom surface of the buffer tank 8, forming a tank body capable of accommodating the horizontal part of the material conveying device 3, and the side wall of the tank body away from the end of the horizontal part of the material conveying device 3 is provided with a discharge port. The discharge port (preferably, the discharge port is located on the bottom surface of the buffer tank 8) is connected to the inlet of the discharge pump 9, and the outlet of the discharge pump 9 is connected to the inlet of the horizontal screw extruder 42. In this scheme, preferably, the side wall plate 2111 is provided with a plurality of screen holes; based on the arrangement of the plurality of screen holes, the moisture in the cracked material seeps through the screen holes into the buffer tank, and then is transported out through the discharge pump 9. In this way, the solid content of the material transported by the conveying device 3 is improved, and the load of the screw extruder 41 is reduced. Based on the seepage of the moisture in the cracked material, the weight of the material is reduced, and the pressure on the side wall plate 2111 is reduced, which helps the discharge. At this time, preferably, the side wall of the buffer tank 8 can be used as the fixed side wall 212.

[0030] In some embodiments, as shown in Figure 1As shown, the concentration adjusting device 7 comprises a chelating tank 71 (such as model AH10) and a tank filling machine 72 (such as model DH-C2); the concentrated liquid output by the membrane separation device 5 is transported to the chelating tank 71 and the tank filling machine 72; the material output by the chelating tank 71 is transported to the tank filling machine 72. The chelating tank 71 is provided with trace element (such as nitrogen, phosphorus, potassium, etc.) adding ports to meet the requirements of liquid organic fertilizer on trace elements.

[0031] In some embodiments, as Figure 1 As shown, three sections of coil pipes are arranged in the pyrolysis kettle 1 from top to bottom, and each section of coil pipe is controlled respectively; and temperature measuring points are arranged at upper, middle and lower positions of the pyrolysis kettle 1 respectively, so as to accurately control the temperature of upper, middle and lower parts of the pyrolysis kettle through the heat medium flow of each section of coil pipe, and realize the optimal temperature distribution.

Claims

1. A system for preparing a liquid organic fertilizer, characterized by, The system comprises a cracking kettle (1), a discharge buffer device (2), a material conveying device (3), a multi-stage solid-liquid separation device (4), a membrane separation device (5), a clear liquid storage device (6) and a concentration adjusting device (7); The cracking kettle (1) is used for cracking raw materials, and a discharge port of the cracking kettle (1) is located vertically above a feeding position of the discharge buffer device (2); The discharge buffer device (2) is used for buffering the material output by the cracking kettle (1), and the material output by the discharge buffer device (2) is conveyed to the multi-stage solid-liquid separation device (4) through the material conveying device (3); Liquid-phase material output by the multi-stage solid-liquid separation device (4) is conveyed to the membrane separation device (5), and solid-phase material is output externally; Clear liquid output by the membrane separation device (5) is conveyed to the clear liquid storage device (6), and concentrated liquid output by the membrane separation device (5) is conveyed to the concentration adjusting device (7); The concentration adjusting device (7) is used for outputting liquid organic fertilizer products after adjusting the concentration of the concentrated liquid; A discharge port of the clear liquid storage device (6) is connected to a feeding port of the cracking kettle (1); The discharge buffer device (2) comprises a plurality of side walls (21); The plurality of side walls (21) enclose a buffer space (22) in the shape of an inverted truncated cone; A top of the buffer space (22) is a feeding port (221), and a bottom of the buffer space (22) is a discharge port (222), the feeding port (221) is located vertically below the discharge port of the cracking kettle (1); At least one of the plurality of side walls (21) is a variable-angle side wall (211); Based on the variable angle of the variable-angle side wall (211), the size of the feeding port (221) is variable, and the size of the discharge port (222) is constant; The variable-angle side wall (211) comprises a side wall plate (2111) and an elastic telescopic member (2112).

2. The system for preparing liquid organic fertilizer according to claim 1, wherein The buffer space (22) is enclosed by the side wall plate (2111) and the side wall (21); One end of the elastic telescopic member (2112) is a hinged fixed end, and the other end is hinged to the side wall plate (2111), and the elastic telescopic member (2112) performs telescopic action based on the weight change of the material supported by the side wall plate (2111).

3. The liquid organic fertilizer preparation system according to claim 2, characterized by, The elastic telescopic member (2112) comprises a telescopic sleeve (21121) and a telescopic spring (21122); One end of the telescopic spring (21122) is a hinged fixed end, and the other end is hinged to the side wall plate (2111); The telescopic sleeve (21121) is sleeved on the telescopic spring (21122) and can be telescopic with the telescopic spring (21122) to limit the deformation direction of the telescopic spring (21122).

4. The liquid organic fertilizer preparation system according to claim 1, characterized by, The side wall (21) comprises two variable-angle side walls (211) and two fixed side walls (212) arranged oppositely; The variable-angle side walls (211) and the fixed side walls (212) are alternately arranged to enclose the buffer space (22); The fixed side walls (212) are arranged in parallel. The variable-angle side wall (211) is arranged on the bottom side of the fixed side wall (212).

5. The liquid organic fertilizer preparation system according to claim 1, characterized by, The horizontal part of the material conveying device (3) is arranged in the discharge port (222).

6. The liquid organic fertilizer preparation system according to claim 1, characterized by, The multi-stage solid-liquid separation device (4) comprises a screw extruder (41), a horizontal screw extruder (42), a high-speed centrifuge (43) and a vibrating screen (44). The material conveyed by the material conveying device (3) sequentially passes through the screw extruder (41), the horizontal screw extruder (42), the high-speed centrifuge (43) and the vibrating screen (44). The liquid phase separated by the vibrating screen (44) is conveyed to the membrane separation device (5).

7. The liquid organic fertilizer preparation system according to claim 6, characterized by, The number of the vibrating screens (44) is 2, and the vibrating screens are arranged in series.

8. The liquid organic fertilizer preparation system according to claim 1, characterized by, The concentration adjusting device (7) comprises a chelation tank (71) and a tank filling machine (72). The concentrated liquid output by the membrane separation device (5) is conveyed to the chelation tank (71) and the tank filling machine (72). The material output by the chelation tank (71) is conveyed to the tank filling machine (72).

9. The liquid organic fertilizer preparation system according to claim 1, characterized by, Three sections of pipe coils are arranged in the lysing kettle (1) from top to bottom, and each pipe coil is controlled respectively.

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