A solid-liquid anaerobic treatment device for bio-fertilizer wastewater

Abstract

This invention relates to the field of wastewater treatment equipment technology, and discloses a solid-liquid anaerobic treatment device for bio-fertilizer wastewater. The wastewater treatment tank has a conical water distributor at the bottom of its inner wall, a driving component above the conical water distributor, and a separation component at the upper end of the driving component. During operation, the conical frame, drain hole, and annular groove design achieve biogas bubble breakage and sludge particle separation. When the lifting ring descends, liquid is reversed and injected, clearing the drain hole and blowing off sludge particles, forming a self-cleaning cycle, improving solid-liquid separation efficiency, and preventing blockage. The self-driven lifting and separation structure utilizes the impact of the inlet water flow on the fan blades to drive the rotating rod and reciprocating screw, which in turn raises and lowers the connecting ring, hollow rod, and separation component without additional power. Ultimately, it achieves the coordinated operation of bubble breakage, sludge interception, and liquid return, optimizing the stability of anaerobic treatment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a solid-liquid anaerobic treatment device for bio-fertilizer wastewater. Background Technology

[0002] Bio-fertilizer wastewater contains a large amount of organic matter, and direct discharge will cause environmental pollution. Anaerobic treatment technology has become a commonly used treatment method because it can degrade organic matter and produce biogas. However, traditional anaerobic treatment processes have problems such as long sludge retention time and low organic load rate. At the same time, bio-fertilizer wastewater has a high solid content, which can easily clog pipes. Therefore, a special solid-liquid anaerobic treatment device is needed to improve treatment efficiency and stability.

[0003] A Chinese patent with publication number CN113620504B discloses an anaerobic treatment device for intensive pig farm wastewater, comprising a shell, an inlet pipe installed on one side of the shell, an outlet pipe installed on the other side of the shell, a water flow mechanism installed inside the shell, with the inlet pipe corresponding to one side of the water flow mechanism, and a cover mechanism installed on the shell. The cover mechanism includes a cover plate, a dosing device, a separation component, and a partition plate. The cover plate is installed on the shell, the partition plate is installed inside the cover plate, and the partition plate divides the upper part of the cover plate into a pre-collection area. An exhaust pipe is installed on the cover plate, the separation component is installed inside the cover plate, and the dosing device is fixedly installed on the cover plate, with one end of the dosing device protruding through the partition plate. This invention enables the anaerobic treatment of pig farm wastewater to degrade organic matter with maximum efficiency, increase methane production, obtain cleaner methane gas, and facilitate the replacement of anaerobic sludge.

[0004] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: In existing anaerobic treatment devices and the above-mentioned comparative documents, during biogas collection, biogas will cause sludge to be disturbed, and some sludge particles will be trapped on the air bubbles, making it difficult to separate the sludge particles, resulting in impure biogas and sludge loss in the end. Summary of the Invention

[0005] The technical problem to be solved by this invention is that in the existing anaerobic treatment operation, biogas carries bubbles, which are inconvenient to separate and collect. To address this, we propose a solid-liquid anaerobic treatment device for bio-fertilizer wastewater.

[0006] To achieve the above objectives, this application adopts the following technical solution: a solid-liquid anaerobic treatment device for bio-fertilizer wastewater, including a wastewater treatment tank, an inlet pipe fixedly connected to the outside of the wastewater treatment tank, a conical water distributor provided at the bottom of the inner wall of the wastewater treatment tank, a driving component provided above the conical water distributor, and a separation component for breaking biogas bubbles provided at the upper end of the driving component.

[0007] The separation component includes a lifting ring that is slidably connected to the inner wall of the wastewater treatment tank. A conical frame is fixedly connected to the bottom surface of the lifting ring, and a drain hole is fixedly connected to the bottom surface of the conical frame. A drain pipe is fixedly connected to the bottom end of the conical frame, and a conical cover is fixedly connected to the outside of the drain pipe. An annular groove is also opened on the upper surface of the conical cover. The conical cover, together with the conical frame and the drain pipe, forms a hollow groove. A horizontal plate is fixedly connected to the inner wall of the lifting ring, and a liquid injection component for reflux liquid supply is provided on the upper surface of the lifting ring.

[0008] Preferably, the groove below the drain hole is larger than the groove above it.

[0009] Preferably, a drainage groove is provided on the outside of the drainage pipe, with one side opening of the drainage groove corresponding to the hollow groove, and the other side opening penetrating the bottom side of the drainage pipe.

[0010] Preferably, the driving component includes a protective tube fixedly connected to the upper surface of the conical water distributor, a rotating rod rotatably connected inside the protective tube, the bottom end of the rotating rod being located inside the conical water distributor and a fan blade fixedly connected to the outer side of the bottom end of the rotating rod, a liquid seal being provided between the rotating rod and the protective tube, a reciprocating screw fixedly connected to the upper surface of the rotating rod, a connecting ring threadedly connected to the outer side of the reciprocating screw, the connecting ring being located inside the protective tube, a hollow rod fixedly connected to the upper surface of the connecting ring, the hollow rod penetrating the protective tube, a liquid seal being provided at the connection between the hollow rod and the protective tube, and the outer side of the hollow rod being fixedly connected to the reciprocating screw.

[0011] Preferably, the bottom surface of the drain pipe is also provided with a lifting groove, and the protective pipe is slidably connected inside the lifting groove.

[0012] Preferably, a limiting groove is formed on the inner wall of the protective tube, and a limiting block is fixedly connected to the outside of the connecting ring, with the limiting block slidably connected inside the limiting groove.

[0013] Preferably, a fixing ring is fixedly connected to the inner wall of the wastewater treatment tank, and the liquid injection assembly includes a top rod fixedly connected to the bottom surface of the fixing ring, a liquid storage pipe fixedly connected to the upper surface of the lifting ring, a pressure plate fixedly connected to the bottom surface of the top rod, the pressure plate being slidably connected to the inside of the liquid storage pipe, a one-way pressure valve B being provided on the bottom surface of the liquid storage pipe, and an arc-shaped liquid groove being opened on the inner side of the lifting ring, with the arc-shaped liquid groove corresponding to the one-way pressure valve B.

[0014] Preferably, a one-way pressure valve A is provided on the outside of the liquid storage pipe.

[0015] Preferably, a partition plate is fixedly connected between the conical frame and the conical cover, and the upper groove of the annular groove is larger than the lower groove.

[0016] Preferably, a three-phase separator is installed at the upper end of the wastewater treatment tank, and an outlet pipe is fixedly connected to the outside of the wastewater treatment tank, with the outlet pipe corresponding to the three-phase separator.

[0017] The technical effects and advantages of this invention are as follows:

[0018] In this invention, on the one hand, the biogas bubbles are broken and separated from the sludge particles by means of bubble breakage and reflux cleaning, using a conical frame, drainage hole and ring groove design. When the lifting ring descends, the liquid is poured in the reverse direction to complete the unblocking of the drainage hole and the blowing off of sludge particles, forming a self-cleaning cycle, improving the solid-liquid separation efficiency and preventing blockage.

[0019] On the other hand, the structure adopts a self-driven lifting and separation mechanism. It utilizes the impact of the inlet water flow on the fan blades to drive the rotating rod and reciprocating screw to rotate, thereby raising and lowering the connecting ring, hollow rod and separation components. No additional power is required, which realizes the coordinated operation of bubble breaking, sludge interception and liquid return, and optimizes the stability of anaerobic treatment. Attached Figure Description

[0020] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0021] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the wastewater treatment tank of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the separating component of the present invention;

[0024] Figure 4 This is a schematic diagram of the drain pipe and conical cap structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the top structure of the conical frame of the present invention;

[0026] Figure 6 This is a schematic diagram of the bottom structure of the conical frame of the present invention;

[0027] Figure 7 This is a schematic diagram of the drive component structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the liquid injection assembly structure of the present invention;

[0029] Figure 9 This is a cross-sectional view of the water flow motion state according to the present invention.

[0030] Legend: 1. Wastewater treatment tank; 11. Inlet pipe; 12. Outlet pipe; 13. Three-phase separator; 2. Separation component; 21. Lifting ring; 22. Conical frame; 221. Drain hole; 222. Divider plate; 23. Horizontal plate; 24. Liquid injection assembly; 241. Storage pipe; 242. Top rod; 243. Pressure plate; 244. One-way pressure valve A; 245. One-way pressure valve B; 246. Arc-shaped liquid tank; 25. Fixing ring; 26. Drain pipe; 261. Drain tank; 262. Lifting tank; 27. Conical cover; 271. Ring groove; 3. Conical water distributor; 4. Drive component; 41. Rotating rod; 42. Fan blade; 43. Reciprocating screw; 44. Connecting ring; 45. Hollow rod; 46. Protective pipe. Detailed Implementation

[0031] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0032] Reference Figures 1-5 As shown, the present invention provides a technical solution: a solid-liquid anaerobic treatment device for bio-fertilizer wastewater, including a wastewater treatment tank 1, an inlet pipe 11 fixedly connected to the outside of the wastewater treatment tank 1, a conical water distributor 3 provided at the bottom of the inner wall of the wastewater treatment tank 1, a driving component 4 provided above the conical water distributor 3, and a separation component 2 for breaking biogas bubbles provided at the upper end of the driving component 4.

[0033] Separation component 2 includes a lifting ring 21 slidably connected to the inner wall of wastewater treatment tank 1. A conical frame 22 is fixedly connected to the bottom surface of the lifting ring 21, and a drain hole 221 is fixedly connected to the bottom surface of the conical frame 22. A drain pipe 26 is fixedly connected to the bottom end of the conical frame 22, and a conical cover 27 is fixedly connected to the outside of the drain pipe 26. An annular groove 271 is formed on the upper surface of the conical cover 27. The conical cover 27, together with the conical frame 22 and the drain pipe 26, forms a hollow groove. A horizontal plate 23 is fixedly connected to the inner wall of the lifting ring 21, and a liquid injection component 24 for reflux liquid supply is provided on the upper surface of the lifting ring 21. During anaerobic treatment, the horizontal plate 23 is driven to rise and fall by the driving component 4, thereby driving the lifting ring 21 and the conical frame 221 below. 2. The upward-flowing wastewater and biogas bubbles enter the space between the conical frame 22 and the conical cover 27 through the drain hole 221. When the bubbles pass through the drain hole 221, the larger bubbles burst, and the sludge particles inside are scattered. Some particles are intercepted at the opening of the drain hole 221. The sludge particles that enter the hollow tank slide down the top surface of the conical frame 22 under the action of gravity. The wastewater and bubbles are discharged upward through the ring groove 271 under the action of buoyancy and their initial power. Subsequently, when the lifting ring 21 descends, the liquid above the wastewater treatment tank 1 is poured in reverse through the ring groove 271, which blows away the sludge particles blocking the drain hole 221 and blows off the sludge particles on the top surface of the conical frame 22.

[0034] Reference Figures 1-8 As shown in this embodiment, the groove below the drain hole 221 is larger than the groove above it. By setting the drain hole 221 to be smaller at the top and larger at the bottom, when the conical frame 22 moves downward, the air bubbles gather in the drain hole 221, which facilitates the bursting of the air bubbles. At the same time, larger and more numerous sludge particles will block the groove of the drain hole 221, preventing the sludge particles from continuing to rise.

[0035] A drainage trough 261 is provided on the outside of the drainage pipe 26. One side opening of the drainage trough 261 corresponds to the hollow trough, and the other side opening penetrates the bottom of the drainage pipe 26. With the drainage trough 261, when the drainage pipe 26 moves downward, some wastewater can directly enter the interior of the drainage pipe 26 through the bottom opening of the drainage trough 261 to assist in wastewater transportation. The inner wall of the drainage trough 261 is provided with a baffle plate to help the bubbles break. When the conical frame 22 moves upward, the liquid above enters the interior of the hollow trough through the annular groove 271, and the sludge particles in the hollow trough are discharged downward through the drainage trough 261.

[0036] The drive component 4 includes a protective tube 46 fixedly connected to the upper surface of the conical water distributor 3. A rotating rod 41 is rotatably connected inside the protective tube 46. The bottom end of the rotating rod 41 is located inside the conical water distributor 3, and a fan blade 42 is fixedly connected to the outer side of the bottom end of the rotating rod 41. A liquid seal is provided between the rotating rod 41 and the protective tube 46. A reciprocating screw 43 is fixedly connected to the upper surface of the rotating rod 41. A connecting ring 44 is threaded to the outer side of the reciprocating screw 43. The connecting ring 44 is located inside the protective tube 46. A hollow rod 45 is fixedly connected to the upper surface of the connecting ring 44. The rod 45 passes through the protective tube 46. A liquid seal is provided at the connection between the hollow rod 45 and the protective tube 46. The outer side of the hollow rod 45 is fixedly connected to the reciprocating screw 43. The water outlet of the water inlet pipe 11 is correspondingly set with the fan blade 42. During the water injection process, the fan blade 42 and the rotating rod 41 are driven to rotate by the impact of the water flow. The protective tube 46 plays a protective role. The rotating rod 41 drives the reciprocating screw 43 to rotate synchronously, thereby driving the connecting ring 44 to rise and fall repeatedly. The hollow rod 45 rises and falls accordingly, thereby driving the horizontal plate 23 and the conical frame 22 to achieve the lifting effect.

[0037] The bottom surface of the drain pipe 26 is also provided with a lifting groove 262, and the protective pipe 46 is slidably connected inside the lifting groove 262. The setting of the protective pipe 46 ensures the stable lifting of the conical frame 22 and the lifting ring 21.

[0038] A limiting groove is provided on the inner wall of the protective tube 46, and a limiting block is fixedly connected to the outer side of the connecting ring 44. The limiting block is slidably connected inside the limiting groove. The setting of the limiting block and the limiting groove ensures the stable lifting and lowering of the connecting ring 44.

[0039] A fixed ring 25 is fixedly connected to the inner wall of the wastewater treatment tank 1. The liquid injection assembly 24 includes a top rod 242 fixedly connected to the bottom surface of the fixed ring 25. A liquid storage pipe 241 is fixedly connected to the upper surface of the lifting ring 21. A pressure plate 243 is fixedly connected to the bottom surface of the top rod 242. The pressure plate 243 is slidably connected to the inside of the liquid storage pipe 241. A one-way pressure valve B245 is provided on the bottom surface of the liquid storage pipe 241. An arc-shaped liquid groove 246 is opened on the inner side of the lifting ring 21. The arc-shaped liquid groove 246 is correspondingly set with the one-way pressure valve B245. When the lifting ring 21 moves upward, the lifting ring 21 drives the liquid storage pipe 241 to move upward. The pressure plate 243 squeezes the liquid inside the liquid storage pipe 241 and discharges it from the arc-shaped liquid groove 246 through the one-way pressure valve B245. The liquid discharged from the arc-shaped liquid groove 246 is discharged from the hollow groove, which is used to assist in the discharge of sludge particles in the hollow groove and the sludge particles in the drain hole 221.

[0040] A one-way pressure valve A244 is installed on the outside of the liquid storage pipe 241. The one-way pressure valve A244 is connected to the inside of the liquid storage pipe 241. When the lifting ring 21 moves downward, the downward movement of the liquid storage pipe 241 creates a negative pressure inside the liquid storage pipe 241. The one-way pressure valve A244 is used to draw liquid, and the treated wastewater is drawn into the liquid storage pipe 241 to replenish the liquid for subsequent discharge.

[0041] A partition plate 222 is fixedly connected between the conical frame 22 and the conical cover 27. The upper opening of the annular groove 271 is larger than the lower opening. The partition plate 222 is used to divide the hollow groove, which facilitates the discharge of air bubbles and the discharge of liquid. The fact that the upper opening of the annular groove 271 is larger than the lower opening makes it easier for more liquid to enter the annular groove 271 when the lifting ring 21 moves upward.

[0042] A three-phase separator 13 is installed at the upper end of the wastewater treatment tank 1. A water outlet pipe 12 is fixedly connected to the outside of the wastewater treatment tank 1. The water outlet pipe 12 is correspondingly set with the three-phase separator 13. The three-phase separator 13 is used to collect biogas, and the water outlet pipe 12 is used to discharge the treated liquid.

[0043] like Figure 9 As shown, Figure 9 The left side shows the descent of the separation component 2, with the injection assembly 24 in a suction state. The water inlet pipe 11 descends in conjunction with the separation component 2. Figure 9 On the right is the rising process of the separation component 2. Some water is pushed upward and discharged from the outlet pipe 12, while the other part enters the hollow tank to assist in rinsing. At the same time, the liquid injection component 24 pressurizes water for rinsing.

[0044] Working principle: In the wastewater treatment process, the outlet of the inlet pipe 11 is correspondingly set with the fan blade 42. The water flow impact drives the fan blade 42 and the rotating rod 41 to rotate. The protective pipe 46 provides protection. The rotating rod 41 drives the reciprocating screw 43 to rotate synchronously, which in turn drives the connecting ring 44 to rise and fall repeatedly. The hollow rod 45 rises and falls accordingly, thereby driving the horizontal plate 23 and the conical frame 22 to achieve the lifting effect. When the conical frame 22 descends, the upward-flowing wastewater and biogas bubbles enter the space between the conical frame 22 and the conical cover 27 through the drain hole 221. When the bubbles pass through the drain hole 221, the larger bubbles burst. The sludge particles inside the tank are scattered, and some particles are intercepted at the opening of the drain hole 221. The sludge particles that enter the hollow tank slide down the top surface of the conical frame 22 under the action of gravity, while the wastewater and air bubbles are discharged upward through the ring groove 271 under the action of buoyancy and their initial power. Subsequently, when the lifting ring 21 descends, the liquid above the wastewater treatment tank 1 is poured in reverse through the ring groove 271. On the one hand, it blows away the sludge particles blocking the drain hole 221, and on the other hand, it discharges the sludge particles on the top surface of the conical frame 22 downward through the drain groove 261, thereby breaking up the air bubbles and reducing the adhesion of sludge particles.

[0045] In addition, when the lifting ring 21 moves upward, it drives the liquid storage tube 241 to move upward. The pressure plate 243 squeezes the liquid inside the liquid storage tube 241 and discharges it from the arc-shaped liquid tank 246 through the one-way pressure valve B245. The liquid discharged from the arc-shaped liquid tank 246 is discharged from the hollow tank to assist in the discharge of sludge particles in the hollow tank and the sludge particles in the drain hole 221. When the lifting ring 21 moves downward, the downward movement of the liquid storage tube 241 creates a negative pressure inside the liquid storage tube 241, and the one-way pressure valve A244 draws liquid to replenish it.

[0046] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A solid-liquid anaerobic treatment device for bio-fertilizer wastewater, characterized in that, The system includes a wastewater treatment tank, an inlet pipe fixedly connected to the outside of the wastewater treatment tank, a conical water distributor installed at the bottom of the inner wall of the wastewater treatment tank, a driving component installed above the conical water distributor, and a separation component for breaking up biogas bubbles installed at the upper end of the driving component. The separation component includes a lifting ring slidably connected to the inner wall of the wastewater treatment tank. A conical frame is fixedly connected to the bottom surface of the lifting ring, and a drain hole is fixedly connected to the bottom surface of the conical frame. A drain pipe is fixedly connected to the bottom end of the conical frame, and a conical cover is fixedly connected to the outside of the drain pipe. An annular groove is also formed on the upper surface of the conical cover. The conical cover, together with the conical frame and the drain pipe, forms a hollow groove. A horizontal plate is fixedly connected to the inner wall of the lifting ring, and a liquid injection component for reflux liquid supply is provided on the upper surface of the lifting ring. The driving component includes a protective tube fixedly connected to the upper surface of the conical water distributor. A rotating rod is rotatably connected inside the protective tube. The bottom end of the rotating rod is located inside the conical water distributor, and a fan blade is fixedly connected to the outer side of the bottom end of the rotating rod. A liquid seal is provided between the rotating rod and the protective tube. A reciprocating screw is fixedly connected to the upper surface of the rotating rod. A connecting ring is threaded to the outer side of the reciprocating screw. The connecting ring is located inside the protective tube. A hollow rod is fixedly connected to the upper surface of the connecting ring. The hollow rod penetrates the protective tube. A liquid seal is provided at the connection between the hollow rod and the protective tube. The outer side of the hollow rod is fixedly connected to the reciprocating screw. A fixing ring is fixedly connected to the inner wall of the wastewater treatment tank. The liquid injection assembly includes a top rod fixedly connected to the bottom surface of the fixing ring. A liquid storage pipe is fixedly connected to the upper surface of the lifting ring. A pressure plate is fixedly connected to the bottom surface of the top rod. The pressure plate is slidably connected to the inside of the liquid storage pipe. A one-way pressure valve B is provided on the bottom surface of the liquid storage pipe. An arc-shaped liquid groove is opened on the inner side of the lifting ring. The arc-shaped liquid groove is correspondingly arranged with the one-way pressure valve B.

2. The bio-fertilizer wastewater solid-liquid anaerobic treatment device according to claim 1, characterized in that: The groove below the drain hole is larger than the groove above it.

3. The bio-fertilizer wastewater solid-liquid anaerobic treatment device according to claim 1, characterized in that: A drainage groove is provided on the outside of the drainage pipe. One side opening of the drainage groove is set to correspond to the hollow groove, and the other side opening penetrates the bottom side of the drainage pipe.

4. The bio-fertilizer wastewater solid-liquid anaerobic treatment device according to claim 1, characterized in that: The bottom surface of the drain pipe is also provided with a lifting groove, and the protective pipe is slidably connected inside the lifting groove.

5. The bio-fertilizer wastewater solid-liquid anaerobic treatment device according to claim 4, characterized in that: A limiting groove is formed on the inner wall of the protective tube, and a limiting block is fixedly connected to the outside of the connecting ring. The limiting block is slidably connected inside the limiting groove.

6. The bio-fertilizer wastewater solid-liquid anaerobic treatment device according to claim 1, characterized in that: A one-way pressure valve A is installed on the outside of the liquid storage pipe.

7. The bio-fertilizer wastewater solid-liquid anaerobic treatment device according to claim 1, characterized in that: A partition plate is fixedly connected between the conical frame and the conical cover, and the upper groove of the annular groove is larger than the lower groove.

8. The bio-fertilizer wastewater solid-liquid anaerobic treatment device according to claim 1, characterized in that: A three-phase separator is installed at the upper end of the wastewater treatment tank, and an outlet pipe is fixedly connected to the outside of the wastewater treatment tank. The outlet pipe is correspondingly arranged with the three-phase separator.

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