Integrated high-dry livestock and poultry manure dehydration device

Abstract

The invention discloses an integrated high-dryness livestock and poultry manure dehydration device, and relates to the technical field of manure dehydration, the integrated high-dryness livestock and poultry manure dehydration device comprises a primary separator, a secondary separator and a secondary extruder which are sequentially arranged from top to bottom, and discharge ports of the primary separator and the secondary separator are connected with a feed port of the secondary extruder through slag discharge pipes; a liquid outlet of the first-stage separator is connected with a connecting pipe, the two ends of the connecting pipe are connected with a first liquid outlet pipe and a feeding port of the second-stage separator respectively, and the connecting pipe and the second liquid outlet pipe are controlled by corresponding valves to be switched on and off; feed ports of the primary separator and the secondary separator are both connected with a feed pipe and are both controlled by corresponding valves to be opened and closed, and the feed end of the feed pipe is connected with a self-priming pump. The integrated high-dryness livestock and poultry manure dehydration device is compact in structure, small in occupied area and good in stability; the water content of discharged slag is low, and fuel consumption during re-drying of the dryer is reduced; the content of suspended solids in effluent is low, the sediment amount of a subsequent anaerobic biogas digester is reduced, and the service cycle is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of manure dewatering, and specifically to an integrated high-dry livestock and poultry manure dewatering device. Background Art

[0002] The solid content rate in dairy farm sewage is as high as 8% - 12%. The currently commonly used treatment method is to separate the sewage through a primary solid-liquid separator after collection. The moisture content of the separated manure residue is about 70% - 75%, and the manure residue is used as a raw material for the regeneration of cow bedding. The solid content rate in the sewage after solid-liquid separation is 4.5% - 5%. The separated liquid enters the anaerobic pond for fermentation, and the generated biogas can be used by the dryer, boiler, and generator in the dairy farm.

[0003] Existing solid-liquid separation equipment such as primary separators, secondary separators, and secondary extrusion machines all work independently and are arranged dispersedly, occupying a large area. Moreover, some pastures only configure one or two of them, and the proportion of pastures with all three equipment configured is not large, which directly affects the effect of subsequent manure treatment. For example, the solid content rate in the separated sewage is still relatively high, a large amount of manure residue enters the anaerobic pond with the sewage, causing siltation of the manure residue in the anaerobic pond, reducing the effective volume of the anaerobic pond, and shortening the service life of the anaerobic pond. The moisture content of the separated manure residue is relatively high, and usually, it needs to be dried in the sun to further reduce the moisture content. Subject to seasonal influence, the drying time required for the manure residue is different, which directly affects the operation stability of the bedding regeneration equipment. In the cow bedding drying and regeneration process, the manure residue enters the dryer and contacts the high-temperature gas generated by the combustion of fuel introduced into the dryer. The moisture evaporates and is carried away by the airflow after absorbing heat on the surface of the fine manure residue. The high-moisture-content manure residue requires more fuel consumption.

[0004] Therefore, it is very necessary to propose an integrated high-dry livestock and poultry manure dewatering device to solve the above problems. Summary of the Invention

[0005] (I) Technical Problems to be Solved The purpose of the present invention is to provide an integrated high-dry livestock and poultry manure dewatering device to solve the problems raised in the above background art.

[0006] (II) Technical Solutions To achieve the above objectives, the present invention is realized through the following technical solutions: An integrated high-dry-type livestock and poultry manure dewatering device, comprising a primary separator, a secondary separator, and a secondary extruder arranged successively from top to bottom. The discharge ports of the primary separator and the secondary separator are both connected to the feed port of the secondary extruder through slag discharge pipes. The liquid discharge port of the primary separator is connected with a connecting pipe, and both ends of the connecting pipe are respectively connected to the first liquid discharge pipe and the feed port of the secondary separator, and the on-off of both is controlled by corresponding valves. The feed ports of the primary separator and the secondary separator are both connected to the feed pipe, and the on-off of both is controlled by corresponding valves. The feed end of the feed pipe is connected with a self-priming pump.

[0007] Preferably, both the primary separator and the secondary separator are spiral extrusion type solid-liquid separators, and the inner screen aperture of the primary separator is larger than that of the secondary separator.

[0008] Preferably, the feed port of the primary separator is connected with a first buffer tank. The top end of the first buffer tank is connected with an exhaust port, and one side of the first buffer tank is connected with a first overflow pipe.

[0009] Preferably, the feed port of the secondary separator is connected with a second buffer tank, and one side of the second buffer tank is connected with a second overflow pipe.

[0010] Preferably, the primary separator, the secondary separator, and the secondary extruder are all fixedly connected inside the box body, and the bottom end of the box body is fixedly connected with a skid-mounted base.

[0011] Preferably, the self-priming pump is a variable-frequency self-priming pump. A flow meter is provided at the liquid outlet of the self-priming pump, and both the flow meter and the self-priming pump are connected to the controller.

[0012] Preferably, a moisture content sensor is provided at the discharge port of the secondary extruder, and a suspended solid concentration sensor is provided at the liquid discharge port of the secondary separator. Both the moisture content sensor and the suspended solid concentration sensor are connected to the controller.

[0013] Preferably, the valve is an electromagnetic valve, and the electromagnetic valve is connected to the controller.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides an integrated high-dry-type livestock and poultry manure dewatering device, which has the following beneficial effects: 1. For this integrated high-dry-type livestock and poultry manure dewatering device, the solid phase and the liquid phase after solid-liquid separation are respectively subjected to secondary extrusion and secondary separation, reducing the moisture content of the discharged solid phase and the solid content of the liquid phase in the effluent, improving the solid-liquid separation effect. At the same time, its structure is compact and occupies a small area, avoiding the construction of complex civil engineering projects.

[0015] 2. The integrated high-dry livestock and poultry manure dewatering device can effectively reduce the moisture content of the final manure residue. After dewatering, the manure residue can be directly transported into the dryer, eliminating the steps of sun drying and evaporation, improving the operation stability of the bedding regeneration system, and reducing the fuel consumption of the dryer. At the same time, it can reduce the solid content rate of the sewage, reduce the sediment volume of the effluent entering the subsequent anaerobic biogas digester, effectively slow down the pond cleaning cycle of the anaerobic biogas digester, and thus extend the service life of the anaerobic biogas digester.

[0016] 3. The integrated high-dry livestock and poultry manure dewatering device reduces the repeated lifting of sewage. The liquid separated by the primary separator flows by gravity into the secondary separator for dewatering, reducing the power consumption.

[0017] 4. When one of the primary separator and the secondary separator fails, the integrated high-dry livestock and poultry manure dewatering device can ensure the normal solid-liquid separation through the switching of valves, making the equipment operation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view schematic diagram of the structure of the present invention; Figure 2 is the partial enlarged schematic diagram of the structure of the present invention; Figure 3 is the top view schematic diagram of the structure of the present invention.

[0019] In the figure: 1. Controller; 2. Primary separator; 3. Box body; 4. Secondary separator; 5. Slag discharge pipe; 6. Secondary extruder; 7. Feed pipe; 8. Flowmeter; 9. Self-priming pump; 11. Valve a; 12. First overflow pipe; 13. First buffer tank; 14. Connecting pipe; 15. Valve b; 16. First liquid discharge pipe; 17. Exhaust port; 18. Valve c; 19. Second overflow pipe; 20. Second buffer tank; 21. Valve d; 22. Second liquid discharge pipe; 23. Moisture content sensor; 24. Suspended solid concentration sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] Please refer to Figures 1-3As shown in the figure, an integrated high-dry-type livestock and poultry manure dewatering device includes a primary separator 2, a secondary separator 4, and a secondary extruder 6 arranged in sequence from top to bottom. The discharge ports of the primary separator 2 and the secondary separator 4 are both connected to the feed port of the secondary extruder 6 through a slag discharge pipe 5. The liquid discharge port of the primary separator 2 is connected to a connecting pipe 14, and both ends of the connecting pipe 14 are respectively connected to the first liquid discharge pipe 16 and the feed port of the secondary separator 4, and the on-off of both is controlled by corresponding valves. The feed ports of the primary separator 2 and the secondary separator 4 are both connected to a feed pipe 7, and the on-off of both is controlled by corresponding valves. The feed end of the feed pipe 7 is connected to a self-priming pump 9.

[0022] Specifically, a valve b 15 is provided between the connecting pipe 14 and the first liquid discharge pipe 16, a valve c 18 is provided between the connecting pipe 14 and the feed port of the secondary separator 4, a valve a 11 is provided between the feed port of the primary separator 2 and the feed pipe 7, and a valve d 21 is provided between the feed port of the secondary separator 4 and the feed pipe 7.

[0023] During normal use, open valve a 11 and valve c 18, close valve b 15 and valve d 21, and pump the manure through the feed pipe 7 into the primary separator 2 by the self-priming pump 9. Under the action of the primary separator 2, solid-liquid separation of the manure is carried out. The sewage generated by the primary separator 2 flows into the secondary separator 4 by gravity through the connecting pipe 14, and the secondary separator 4 carries out solid-liquid separation again to reduce the solid content rate of the sewage. The sewage generated by the secondary separator 4 is discharged to the sewage collection pool through the second liquid discharge pipe 22; The solid slag materials generated by the primary separator 2 and the secondary separator 4 both fall into the secondary extruder 6 under the action of gravity through the slag discharge pipe 5. Under the extrusion action of the roller of the secondary extruder 6, the moisture in the manure residue is further removed, and the moisture content of the manure residue is reduced. The water removed by extrusion is discharged into the sewage collection pool.

[0024] In special cases, when the primary separator 2 fails, close valve a 11, valve b 15, and valve c 18, open valve d 21, and the manure directly enters the secondary separator 4 through the feed pipe 7, realizing normal feeding operation of the device when the primary separator 2 fails; when the secondary separator 4 fails, close valve c 18 and valve d 21, open valve b 15, and the filtrate of the primary separator 2 is discharged to the sewage collection pool through the first liquid discharge pipe 16, realizing normal feeding operation of the device when the secondary separator 4 fails.

[0025] Specifically, both the primary separator 2 and the secondary separator 4 are spiral extrusion solid-liquid separators, and the inner screen aperture of the primary separator 2 is larger than that of the secondary separator 4. Preferably, the screen aperture of the primary separator 2 is 0.8 - 1 mm, and the screen aperture of the secondary separator 4 is 0.5 - 0.8 mm. By setting different screen apertures, hierarchical filtration can be achieved, the solid-liquid separation effect can be improved, the solid content rate of the sewage can be reduced, and the solid content rate of the sewage discharged by the separator can reach 2.5 - 4%; the solid slag produced by the primary separator 2 and the secondary separator 4 is further dewatered by the counter-roller extrusion in the secondary extruder 6, and the water content of the manure residue is reduced. After testing, the final water content of the manure residue can reach 60% - 62%.

[0026] To avoid the increase in pressure inside the primary separator 2 caused by excessive sewage, which affects the solid-liquid separation effect, the feed inlet of the primary separator 2 is connected to a first buffer tank 13, and one side of the first buffer tank 13 is connected to a first overflow pipe 12. By setting the first buffer tank 13, excessive sewage can be buffered, and at the same time, the first overflow pipe 12 can discharge the excessive sewage back to the manure collection tank; the top of the first buffer tank 13 is connected to an exhaust port 17, and the gas generated during the dehydration process can be discharged through the exhaust port 17.

[0027] To avoid the increase in pressure inside the secondary separator 4 caused by excessive sewage, which affects the solid-liquid separation effect, the feed inlet of the secondary separator 4 is connected to a second buffer tank 20, and one side of the second buffer tank 20 is connected to a second overflow pipe 19. By setting the second buffer tank 20, excessive sewage can be buffered, and at the same time, the second overflow pipe 19 can discharge the excessive sewage back to the manure collection tank.

[0028] The primary separator 2, the secondary separator 4, and the secondary extruder 6 are all fixedly connected inside the box body 3, and the bottom end of the box body 3 is fixedly connected with a skid-mounted base. By setting the skid-mounted base, it is convenient to move it.

[0029] In some embodiments, to facilitate the control of the liquid inlet volume, the self-priming pump 9 is a variable-frequency self-priming pump, and a flow meter 8 is provided at the liquid outlet of the self-priming pump 9. Both the flow meter 8 and the self-priming pump 9 are connected to the controller 1. The feed flow is detected by the flow meter 8, and the controller 1 adjusts the rotation speed of the self-priming pump 9 according to the flow detected by the flow meter 8 to achieve the control of the liquid inlet volume.

[0030] In some embodiments, a moisture content sensor 23 is provided at the discharge port of the secondary extruder 6, and a suspended solid concentration sensor 24 is provided at the liquid discharge port of the secondary separator 4. Both the moisture content sensor 23 and the suspended solid concentration sensor 24 are connected to the controller 1. The moisture content of the discharged manure residue can be detected in a timely manner through the moisture content sensor 23, and the solid content of the discharged liquid can be detected through the suspended solid concentration sensor 24 to judge the wear degree of the sieves of the primary separator 2 and the secondary separator 4, so that the vulnerable parts of the sieves can be replaced in time; according to the moisture content of the discharged manure residue, the rotation speed of the self-priming pump 9 is adjusted through the controller 1 to change the liquid inlet volume, so that the moisture content of the discharged manure residue is within the set range.

[0031] To make its control more convenient, the valve is a solenoid valve, and the solenoid valve is connected to the controller 1. When the primary separator 2 or the secondary separator 4 fails, the solenoid valve is controlled to open and close through the controller 1, and thus the on-off of the pipeline can be controlled.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated high-dry livestock and poultry manure dehydration device, characterized in that: It comprises a primary separator (2), a secondary separator (4) and a secondary extruder (6) which are arranged in sequence from top to bottom, wherein the discharge ports of the primary separator (2) and the secondary separator (4) are connected to the feed port of the secondary extruder (6) via a slag discharge pipe (5); The discharge port of the primary separator (2) is connected to a connecting pipe (14), and the two ends of the connecting pipe (14) are respectively connected to the first discharge pipe (16) and the feed port of the secondary separator (4), and both are controlled on and off by corresponding valves; The feed inlets of the primary separator (2) and the secondary separator (4) are both connected to a feed pipe (7) and are both controlled on and off by corresponding valves. The feed end of the feed pipe (7) is connected to a self-priming pump (9).

2. The integrated high-dry livestock and poultry manure dehydration device according to claim 1 is characterized by: The primary separator (2) and the secondary separator (4) are both screw extrusion type solid-liquid separators, and the mesh diameter of the inner screen of the primary separator (2) is larger than the mesh diameter of the inner screen of the secondary separator (4).

3. The integrated high-dry livestock and poultry manure dehydration device according to claim 1 is characterized by: The feed inlet of the primary separator (2) is connected to a first buffer box (13), the top of the first buffer box (13) is connected to an exhaust port (17), and one side of the first buffer box (13) is connected to a first overflow pipe (12).

4. The integrated high-dry livestock and poultry manure dehydration device according to claim 1 is characterized by: The feed inlet of the secondary separator (4) is connected to a second buffer box (20), and one side of the second buffer box (20) is connected to a second overflow pipe (19).

5. The integrated high-dry livestock and poultry manure dehydration device according to claim 1 is characterized by: The primary separator (2), the secondary separator (4) and the secondary extruder (6) are all fixedly connected inside the box body (3), and the bottom end of the box body (3) is fixedly connected with a skid-mounted base.

6. The integrated high-dry livestock and poultry manure dehydration device according to claim 1 is characterized by: The self-priming pump (9) is a variable frequency self-priming pump. A flow meter (8) is provided at the liquid outlet of the self-priming pump (9). Both the flow meter (8) and the self-priming pump (9) are connected to the controller (1).

7. The integrated high-dry livestock and poultry manure dehydration device according to claim 6, characterized in that: The discharge port of the secondary extruder (6) is provided with a moisture content sensor (23), and the discharge port of the secondary separator (4) is provided with a suspended matter concentration sensor (24). Both the moisture content sensor (23) and the suspended matter concentration sensor (24) are connected to the controller (1).

8. The integrated high-dry livestock and poultry manure dehydration device according to claim 6 is characterized by: The valve is a solenoid valve, and the solenoid valve is connected to a controller (1).

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