Horizontal extrusion dewatering equipment for cow manure

Abstract

This application relates to the technical field of dewatering equipment. Specifically, an embodiment discloses a horizontal extrusion dewatering device for cow dung, comprising: an extrusion chamber, a screw shaft, a drive unit, and a frame. The extrusion chamber is horizontally placed on the frame, with a feed inlet at one end and a discharge outlet at the other end. Multiple drainage holes are formed in the wall of the extrusion chamber. The screw shaft is horizontally mounted inside the extrusion chamber via a bearing seat, and one end of the screw shaft is connected to the drive unit via a reducer. The drive unit includes a variable frequency motor, a frequency converter, a shaft coupling, a main shaft, and a first bearing seat. The variable frequency motor is fixedly connected to the frame via flange bolts. The frequency converter is electrically connected to the variable frequency motor. The output shaft of the variable frequency motor is connected to the main shaft via the shaft coupling. The main shaft is connected to the end of the screw shaft near the feed inlet, and the end of the screw shaft near the discharge outlet is rotatably connected to the frame via the first bearing seat.

Description

Technical Field

[0001] This application relates to the field of dewatering equipment technology, specifically to a horizontal extrusion dewatering device for cow dung. Background Technology

[0002] Large-scale livestock farming, especially dairy and beef cattle farming, generates a large amount of cow manure every day. This manure has an extremely high water content (usually above 80%-85%), and direct dumping or transportation is not only bulky and costly, but also highly likely to cause environmental pollution, such as leachate contaminating groundwater, emitting foul odors, and breeding mosquitoes, flies, and bacteria. Therefore, the first and crucial step in reducing, rendering harmless, and recycling cow manure is dehydration.

[0003] Therefore, there is an urgent need in this field for a cow manure dehydration device that is highly efficient, stable in operation, low in energy consumption, capable of continuous automated operation, and easy to maintain, in order to overcome the many shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this application is to provide a horizontal extrusion dewatering device for cow manure to solve the problems in the prior art.

[0005] To achieve the above objectives, this application provides a horizontal extrusion dewatering device for cow dung, comprising: an extrusion chamber, a screw shaft, a drive unit, and a frame, wherein... The extrusion chamber is placed horizontally on the frame. The feed port is provided above one end of the extrusion chamber, and the discharge port is provided at the other end of the extrusion chamber. Multiple sets of drainage holes are provided on the wall of the extrusion chamber. The spiral shaft is horizontally mounted inside the extrusion chamber via a bearing seat, and one end of the spiral shaft is connected to the drive device via a reducer. The drive device includes a variable frequency motor, a frequency converter, a shaft coupling, a main shaft, and a first bearing housing. The variable frequency motor is fixedly connected to the frame by flange bolts. The frequency converter is electrically connected to the variable frequency motor. The output shaft of the variable frequency motor is connected to the main shaft through the shaft coupling. The main shaft is connected to the end of the screw shaft near the feed inlet. The end of the screw shaft near the discharge outlet is rotatably connected to the frame through the first bearing housing.

[0006] Optionally, the pitch of the screw shaft gradually decreases from the feeding section near the feed inlet to the middle extrusion section and then to the pressurized discharge section near the discharge outlet.

[0007] Optionally, a filter screen is installed inside the drain hole, close to the wall of the extrusion chamber. The filter screen is a strip screen or a perforated screen plate. The pore size of the filter screen is between 0.5 mm and 1.5 mm.

[0008] Optionally, the extrusion chamber is fitted with an outer shell, which is mounted on the frame. The lower end of the outer shell has a drain port, and a water collection tank is located below the drain port.

[0009] Optionally, an adjustable baffle is provided at the discharge port.

[0010] Optionally, the inner diameter of the extrusion chamber gradually decreases from near the feed inlet to near the discharge outlet.

[0011] Optionally, the helical shaft is a single heavy-duty spindle or a parallel double helical shaft or multiple helical shafts.

[0012] Optionally, the drive device further includes: a second bearing housing, which is coaxially mounted on the frame with the variable frequency motor, and the main shaft extends through the second bearing housing to the end of the screw shaft near the feed inlet.

[0013] Optionally, the end of the spiral shaft near the feed inlet is bolted to the end face of the main shaft via a flange.

[0014] The embodiments of this application have the following advantages: Stable operation and not prone to clogging: The horizontal layout combined with the rotating push of the screw shaft ensures smooth material conveying without dead corners, fundamentally avoiding the jamming problems caused by uneven gravity feeding and the loose bridging of fibrous materials in vertical equipment.

[0015] High dehydration rate and good output dryness: Through a dual gradual structural design of "gradually decreasing screw pitch" and / or "gradually decreasing inner diameter of the extrusion chamber", progressive pressure compression of cow manure is achieved. The pressure of the cow manure increases steadily during movement, and the water is fully squeezed out. The moisture content of the final discharged solid cow manure can be reduced to below 60%, and it is in block or granular form, which is convenient for subsequent transportation, composting or fuel utilization.

[0016] Thorough solid-liquid separation: The carefully designed drain holes / channels, combined with a high-strength filter screen, ensure that only liquid can seep out smoothly under high pressure, while solid materials are effectively retained in the cavity and continue to be transported forward, significantly reducing solid loss and improving material recovery rate.

[0017] Highly automated and energy-efficient: The equipment has a compact structure, allows for continuous feeding and discharging, and is easily integrated into automated sewage treatment production lines. The entire process is conducted in a closed loop, effectively preventing the spread of odors and protecting the working environment. Furthermore, compared to belt filter presses, it consumes significantly less water (no high-pressure flushing water required) and is more energy-efficient. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of a horizontal extrusion dewatering device for cow dung provided for at least one embodiment of this application; Figure 2 A schematic diagram of the extrusion chamber structure of a horizontal extrusion dewatering device for cow dung provided for at least one embodiment of this application; Figure 3 A schematic diagram of the bearing seat structure of a horizontal extrusion dewatering device for cow dung provided in at least one embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Extrusion chamber; 2. Feed inlet; 3. Spiral shaft; 4. Spiral blades; 5. Outer shell; 6. Discharge port; 7. Frame; 41. Feeding section; 42. Extrusion section; 43. Pressurized discharge section; 8. Drain hole; 9. Water collection tank; 10. First bearing seat; 11. Second bearing seat; 12. Variable frequency motor; 13. Variable frequency drive; 14. Shaft coupling; 15. Main shaft; 16. Drain outlet. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0024] This application provides a horizontal extrusion and dewatering device for cow dung, as shown in the following embodiment. Figures 1 to 3 ,include: The components include an extrusion chamber 1, a screw shaft 3, a drive unit, and a frame 7. The extrusion chamber 1 is placed horizontally on the frame 7. The inlet 2 is provided above one end of the extrusion chamber 1, and the outlet 6 is provided at the other end of the extrusion chamber 1. It is used to connect to a feeding pump or conveyor to send the pre-treated liquid or semi-liquid cow manure into the equipment.

[0025] The spiral shaft 3 is horizontally mounted inside the extrusion chamber 1 via a bearing seat. One end of the spiral shaft 3 is connected to the drive device (such as a motor) via a reducer; the drive device provides rotational power.

[0026] The drive device includes a variable frequency motor 12, a frequency converter 13, a shaft coupling 14, a main shaft 15, and a first bearing housing 10, wherein, The variable frequency motor 12 is fixedly connected to the frame 7 by flange bolts. The frequency converter 13 is electrically connected to the variable frequency motor 12. The output shaft of the variable frequency motor 12 is connected to the main shaft 15 through the shaft coupling 14. The main shaft 15 is connected to the end of the screw shaft 3 near the feed port 2. The end of the screw shaft 3 near the discharge port 6 is rotatably connected to the frame 7 through the first bearing seat 10.

[0027] Specifically, by adjusting the rotational speed of the screw shaft 3, the residence time of the material in the extrusion chamber can be controlled, thereby adapting to the processing requirements of different material characteristics.

[0028] In some embodiments, the pitch of the spiral shaft 3 gradually decreases from the feeding section 41 near the feed port 2 to the middle extrusion section 42 and then to the pressurized discharge section 43 near the discharge port 6.

[0029] Specifically, the spiral shaft 3 adopts a variable pitch design, which is as follows: in the feeding section 41 near the feed inlet 2, the pitch is relatively large, and its main function is to quickly receive and transport materials, so that the cow manure is initially distributed in the cavity; in the middle extrusion section 42, the pitch gradually and uniformly decreases. This section is the main dehydration zone, and the space of the material is gradually compressed during the conveying process, and the pressure it receives steadily increases; in the pressurized discharge section 43 near the discharge outlet 6, the pitch is the smallest, forming a final strong pressure extrusion on the material to ensure the dehydration effect and establish reverse pressure, so that the entire extrusion process is more complete.

[0030] The wall of the extrusion chamber 1 has multiple sets of drainage holes 8. In some embodiments, a filter screen (such as a strip screen or a perforated screen plate) is installed inside the drainage holes 8, close to the wall of the extrusion chamber 1. The pore size of the filter screen is selected according to the characteristics of cow dung, usually between 0.5 mm and 1.5 mm, to ensure that only liquid passes through while effectively intercepting solid fibers.

[0031] In some embodiments, the extrusion chamber 1 is covered with a housing 5, the housing 5 is disposed on the frame 7, the lower end of the housing 5 is provided with a drain port 16, and a water collection tank 9 is provided below the drain port 16.

[0032] Specifically, the squeezed liquid (filtrate) is collected through the filter screen and drain hole 8 into the drain port 16 located at the lower end of the outer casing 5, and finally discharged from the water collection tank 9 below the outer casing 5. The drain hole 8, water collection tank 9, drain port 16 and filter screen together constitute the drainage assembly.

[0033] Specifically, as the screw shaft 3 rotates continuously, the fully dehydrated solid cow dung is pushed to the discharge port 6 at the other end of the equipment.

[0034] In some embodiments, an adjustable baffle is provided at the discharge port 6. By adjusting the opening of the discharge port 6, the final pressure in the extrusion chamber can be finely adjusted, thereby flexibly controlling the dryness or wetness of the discharged material to adapt to cow manure with different initial moisture contents or different process requirements.

[0035] In some embodiments, the inner diameter of the extrusion chamber 1 gradually decreases from near the feed inlet 2 to near the discharge outlet 6, forming a certain taper. This dual structure of "variable pitch + variable diameter" can more drastically increase the extrusion pressure, making it suitable for scenarios requiring higher dehydration rates.

[0036] In some embodiments, the helical shaft 3 is a single heavy-duty spindle 15 or a parallel double helical shaft 3 or a multi-helical shaft 3. The double helical shafts 3 are designed to clean each other, prevent sticking, and provide more uniform and powerful conveying and extrusion forces.

[0037] In some embodiments, the drive device further includes: a second bearing housing 11, which is coaxially disposed on the frame 7 with the variable frequency motor 12, and the main shaft 15 extends through the second bearing housing 11 to the end of the spiral shaft 3 near the feed inlet 2.

[0038] In some embodiments, the end of the spiral shaft 3 near the feed inlet 2 is bolted to the end face of the main shaft 15 via a flange.

[0039] Working principle: During operation, pre-treated cow manure is continuously fed into the horizontal extrusion chamber 1 through the feed inlet 2. The drive unit is started, causing the screw shaft 3 to rotate. The screw blades 4 push the cow manure forward. During the pushing process, as the pitch of the screw shaft 3 gradually decreases and / or the chamber gradually narrows, the space occupied by the cow manure is continuously compressed, and the pressure it experiences continuously increases. Under high pressure, the water in the cow manure is squeezed out and discharged from the equipment through the filter screen and drain hole 8. The dehydrated dry matter, under the continued pushing of the screw blades 4, overcomes the resistance of the baffle at the discharge port 6 and is discharged from the discharge port 6 in a solid form, completing the continuous dehydration process.

[0040] Note that, unless otherwise explicitly stated, all features disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by alternative features for achieving the same, equivalent, or similar purpose. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features. Where used, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments, the combination of which with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment constitutes yet another embodiment.

[0041] In the implementation of functions and steps, the corresponding functions and steps in the various embodiments may occur in a different order than those shown. For example, two consecutive functions and steps may actually be executed or implemented substantially in parallel, and they may sometimes be executed or implemented in reverse order, depending on the functions involved.

[0042] Although this application has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this application fall within the scope of protection claimed in this application.

Claims

1. A horizontal extrusion dewatering device for cow dung, characterized in that, include: The extrusion chamber, screw shaft, drive unit, and frame are included. The extrusion chamber is placed horizontally on the frame. The feed port is provided above one end of the extrusion chamber, and the discharge port is provided at the other end of the extrusion chamber. Multiple sets of drainage holes are provided on the wall of the extrusion chamber. The spiral shaft is horizontally mounted inside the extrusion chamber via a bearing seat, and one end of the spiral shaft is connected to the drive device via a reducer. The drive device includes a variable frequency motor, a frequency converter, a shaft coupling, a main shaft, and a first bearing housing. The variable frequency motor is fixedly connected to the frame by flange bolts. The frequency converter is electrically connected to the variable frequency motor. The output shaft of the variable frequency motor is connected to the main shaft through the shaft coupling. The main shaft is connected to the end of the screw shaft near the feed inlet. The end of the screw shaft near the discharge outlet is rotatably connected to the frame through the first bearing housing.

2. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, The pitch of the screw shaft gradually decreases from the feeding section near the feed inlet to the middle extrusion section and then to the pressurized discharge section near the discharge outlet.

3. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, Inside the drain hole, a filter screen is installed close to the wall of the extrusion chamber. The filter screen is a strip screen or a perforated screen plate. The pore size of the filter screen is between 0.5 mm and 1.5 mm.

4. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, The extrusion chamber is fitted with an outer shell, which is mounted on the frame. The lower end of the outer shell has a drain port, and a water collection tank is located below the drain port.

5. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, An adjustable baffle is provided at the discharge port.

6. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, The inner diameter of the extrusion chamber gradually decreases from near the feed inlet to near the discharge outlet.

7. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, The spiral shaft is a single heavy-duty spindle, or a parallel double spiral shaft or a multi-spiral shaft.

8. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, The drive device further includes a second bearing housing, which is coaxially mounted on the frame with the variable frequency motor, and the main shaft extends through the second bearing housing to the end of the screw shaft near the feed inlet.

9. The horizontal extrusion dewatering equipment for cow dung according to claim 1, characterized in that, The end of the spiral shaft near the feed inlet is bolted to the end face of the main shaft via a flange.

Images