Gas stripping type internal circulation anaerobic-aerobic device for large-scale pig raising wastewater treatment

Abstract

The present invention relates to the technical field of sewage treatment, and discloses a gas stripping type internal circulation anaerobic-aerobic device for large-scale pig raising wastewater treatment, the gas stripping type internal circulation anaerobic-aerobic device comprises a treatment tank, a water inlet pipe is fixedly mounted on the side surface of the bottom of the treatment tank, a sludge discharge assembly is fixed on the side surface of the middle of the treatment tank in a penetrating manner, and a backflow assembly is arranged between the sludge discharge assembly and the water inlet pipe; a sludge scraping assembly is attached to the surface of the sludge discharging assembly, an exhaust assembly is fixedly installed in the upper half portion of the treatment pond, and a drainage assembly is arranged on the rear side of the top of the treatment pond. Wastewater generated by pig raising is conveyed into the treatment pond through a water inlet pipe, sludge in a suspended sludge area in the middle of the treatment pond penetrates through a communicating groove to enter a sludge discharge pipe, a motor drives a rotating shaft to rotate, a spiral blade conveys the sludge upwards, sewage in the sludge is squeezed out, and the sewage penetrates through a draining seam to enter a coating barrel. Sewage enters the water inlet pipe through the return pipe and flows back into the treatment tank; therefore, the purpose of reducing the water content when the sludge is discharged is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an air lift type internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment. Background Art

[0002] During the pig farming process, large amounts of pig manure and urine are produced, causing environmental pollution. Therefore, pig farm wastewater treatment is necessary to prevent the direct discharge of harmful substances into the environment. During the pig farm wastewater treatment process, solid particles such as pig manure, pig hair, and feed in the wastewater must first be intercepted and filtered. The pig farm wastewater is then subjected to anaerobic and aerobic fermentation treatment, and disinfection and sterilization can also be performed.

[0003] Although the pig farm wastewater has been filtered, a suspended sludge area will still appear in the middle of the treatment tank during the anaerobic and aerobic treatment of the pig farm wastewater, and a granular sludge area will appear at the bottom of the treatment tank. It is necessary to set a sludge discharge pipe in the middle of the treatment tank. However, when the sludge is discharged, part of the wastewater will also be discharged with the sludge. The sludge needs to be dried separately, which is more troublesome and can be further improved. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an air lift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment, which has the advantages of reducing the water content of sludge during discharge, and solves the problem of large amounts of sewage being carried out during sludge discharge.

[0005] In order to achieve the above-mentioned purpose of reducing the water content of sludge during discharge, the present invention provides the following technical solution: an air lift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment, comprising a treatment tank, a water inlet pipe fixedly installed on the bottom side of the treatment tank, a mud discharge assembly fixedly penetrated and fixed on the middle side of the treatment tank, a reflux assembly is provided between the mud discharge assembly and the water inlet pipe, a mud scraping assembly is adhered to the surface of the mud discharge assembly, an exhaust assembly is fixedly installed in the upper half of the treatment tank, and a drainage assembly is provided on the top rear side of the treatment tank.

[0006] Preferably, the water inlet pipe penetrates into the interior of the treatment pool, and an array of water inlets are opened through the upper surface of the water inlet pipe. A baffle arc plate is fixedly installed on the inner wall of the bottom of the treatment pool. The baffle arc plate is located on the upper side of the water inlet pipe, and the arc center of the baffle arc plate coincides with the axis of the water inlet pipe.

[0007] Preferably, the mud discharge assembly includes a mud discharge pipe that passes through and is fixed in the middle of the treatment pool, a connecting groove is opened through the surface array of the mud discharge pipe, the left end of the mud discharge pipe is connected to a conveying vertical pipe, the conveying vertical pipe is perpendicular to the mud discharge pipe, a drainage seam is opened through the surface array of the upper half of the conveying vertical pipe, a rotating shaft is passed through the center of the conveying vertical pipe, spiral blades are welded on the surface of the rotating shaft, the pitch of the spiral blades gradually decreases from bottom to top, and a motor is connected to the top of the rotating shaft.

[0008] Preferably, the reflux assembly includes a covering cylinder sleeved on the outside of the upper half of the conveying vertical pipe, the conveying vertical pipe passes through and is fixed at the center of the bottom of the covering cylinder, a conical ring is fixed between the top of the covering cylinder and the top of the conveying vertical pipe, a reflux pipe is connected to the lowest point of the covering cylinder, the other end of the reflux pipe is connected to the top of the water inlet pipe, and a mud discharge bucket is welded to the outside of the upper half of the covering cylinder.

[0009] The top end of the two inclined grooves is connected with the upper arc groove, and the bottom end of the two inclined grooves is connected with the lower arc groove; the mud scraping assembly also includes an arch frame fixedly mounted on the top of the mud discharge bucket, the motor is fixedly mounted on the top of the arch frame, and a bracket is slidably connected to the bottom of the two inclined grooves. A ring is provided in the middle of the bracket, and the ring is sleeved on the outside of the hollow drum, and a sliding ball is fixedly mounted on the inner wall of the ring, and the sliding ball is slidably connected in the inclined groove, the upper arc groove and the lower arc groove; a connecting rod is fixedly mounted on the right side of the ring, and the connecting rod passes through and is slidably connected to the conical ring, and a scraping ring is fixedly mounted on the bottom end of the connecting rod, and the scraping ring is sleeved on the outside of the upper half of the conveying vertical pipe, and a wire brush is fixed on the inner wall of the scraping ring, and the wire brush is attached to the surface of the conveying vertical pipe.

[0010] Preferably, the exhaust assembly includes two V-shaped plates fixedly mounted on the left and right side walls of the treatment pool, a diamond-shaped plate fixedly mounted in the middle of the treatment pool, the diamond-shaped plate located between the two V-shaped plates, an exhaust hood provided on the top of the treatment pool, the exhaust hood located directly above the space between the V-shaped plate and the diamond-shaped plate, and an exhaust pipe connected to the top of the exhaust hood.

[0011] Preferably, the drainage assembly includes a drainage trough fixedly mounted on the rear side of the top of the treatment tank, an overflow port is provided on the rear side of the top of the treatment tank, and the overflow port is communicated with the drainage trough.

[0012] Preferably, the bottom wall of the overflow port is lower than the bottom wall of the drainage seam.

[0013] Compared with the prior art, the present invention provides an airlift internal circulation anaerobic aerobic device for large-scale piggery wastewater treatment, which has the following beneficial effects: This airlift internal circulation anaerobic aerobic device transports piggery wastewater into the treatment tank through the water inlet pipe. The sludge in the suspended sludge area in the middle of the treatment tank passes through the connecting groove and enters the sludge discharge pipe. The motor drives the rotating shaft to rotate, and the spiral blades transport the sludge upward. As the pitch of the spiral blades decreases, the pressure on the sludge increases, and the sewage inside the sludge is squeezed out. The sewage passes through the drainage slit and enters the coating cylinder. The sewage enters the water inlet pipe through the return pipe and flows back to the treatment tank, thereby achieving the purpose of reducing the water content of the sludge when it is discharged. In this airlift type internal circulation anaerobic aerobic device, during the rotation of the rotating shaft, the hollow rotating drum is driven to rotate synchronously, and the sliding ball slides along the inclined groove, the upper arc groove and the lower arc groove, driving the bracket to move back and forth up and down. Cooperating with the connecting action of the connecting rod, the scraping ring slides back and forth on the outside of the conveying vertical pipe. The wire bristles in the scraping ring scrape off the sludge particles stuck in the drainage seam, thereby achieving the purpose of stable sludge filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the airlift internal circulation anaerobic aerobic device for large-scale piggery wastewater treatment proposed by the present invention; Figure 2 This is a schematic diagram of the main cross-sectional structure of the airlift internal circulation anaerobic aerobic device for large-scale piggery wastewater treatment proposed by the present invention; Figure 3 This is a schematic diagram of the three-dimensional cross-section structure of the air lift internal circulation anaerobic aerobic device for large-scale piggery wastewater treatment proposed by the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the sludge discharge component and the return flow component of the air lift internal circulation anaerobic aerobic device for large-scale piggery wastewater treatment proposed by the present invention; Figure 5 This is a schematic diagram of the front side perspective structure of the sludge scraping assembly of the air lift internal circulation anaerobic aerobic device for large-scale piggery wastewater treatment proposed by the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure from the left side of the sludge scraping assembly of the airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment proposed by the present invention.

[0015] In the figure: 100, treatment tank; 200, water inlet pipe; 300, mud discharge assembly; 400, return assembly; 500, mud scraping assembly; 600, exhaust assembly; 700, drainage assembly; 201, water inlet; 202, baffle plate; 301, mud discharge pipe; 302, connecting trough; 303, vertical conveying pipe; 304, drainage slit; 305, rotating shaft; 306, spiral blade; 307, motor; 401, covering cylinder; 402, conical ring; 403, mud discharge bucket; 404, return pipe; 501, hollow drum; 502, inclined groove; 503, upper arc groove; 504, lower arc groove; 505, arch frame; 506, bracket; 507, collar; 508, sliding ball; 509, connecting rod; 510, scraper ring; 601, V-shaped plate; 602, diamond-shaped plate; 603, exhaust hood; 604, exhaust pipe; 701, drainage trough; 702, overflow port. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 2 The airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment includes a treatment tank 100, a water inlet pipe 200 is fixedly installed on the bottom side of the treatment tank 100, a mud discharge component 300 is fixed through the middle side of the treatment tank 100, a reflux component 400 is provided between the mud discharge component 300 and the water inlet pipe 200, a mud scraping component 500 is attached to the surface of the mud discharge component 300, an exhaust component 600 is fixedly installed in the upper half of the treatment tank 100, and a drainage component 700 is provided on the top rear side of the treatment tank 100.

[0018] See also Figure 2-Figure 3 The water inlet pipe 200 extends into the treatment tank 100. Water inlets 201 are formed on the upper surface of the water inlet pipe 200. A baffle plate 202 is fixedly mounted on the inner wall of the bottom of the treatment tank 100. The baffle plate 202 is located on the upper side of the water inlet pipe 200, and the center of the baffle plate 202 coincides with the axis of the water inlet pipe 200. The baffle plate 202 blocks the sewage sprayed from the water inlet 201, preventing it from rushing upward.

[0019] See also Figure 2-Figure 4 The mud discharge assembly 300 includes a mud discharge pipe 301 that passes through and is fixed in the middle of the treatment tank 100. The mud discharge pipe 301 is located in the suspended sludge area. A connecting groove 302 is arranged on the surface of the mud discharge pipe 301. The left end of the mud discharge pipe 301 is connected to a vertical conveying pipe 303. The vertical conveying pipe 303 is perpendicular to the mud discharge pipe 301. Through the connection of the mud discharge pipe 301, the vertical conveying pipe 303 is at the same height as the liquid level inside the treatment tank 100, and the top of the vertical conveying pipe 303 is higher than the top of the treatment tank 100.

[0020] The upper half of the vertical delivery pipe 303 is threaded with an array of drainage slits 304. A rotating shaft 305 is rotatably connected to the center of the vertical delivery pipe 303. Spiral blades 306 are welded to the surface of the shaft 305, with a pitch that gradually decreases from bottom to top. A motor 307 is connected to the top of the shaft 305. Motor 307 drives the shaft 305, and the rotation of the spiral blades 306 pushes the sewage inside the vertical delivery pipe 303 upward. As the pitch of the spiral blades 306 decreases, the squeezing force on the sludge increases, squeezing the sewage out of the sludge. The sewage then flows through the drainage slits 304 into the return assembly 400, and the squeezed sludge is discharged from the top of the vertical delivery pipe 303.

[0021] See also Figure 2 and Figure 4 The return assembly 400 includes a covering tube 401 that is sleeved on the outside of the upper half of the delivery vertical pipe 303. The bottom of the covering tube 401 is inclined, and the delivery vertical pipe 303 is fixed through the center of the bottom of the covering tube 401. The drainage slit 304 is located inside the covering tube 401, and the water squeezed out of the sludge enters the interior of the covering tube 401 through the drainage slit 304. A return pipe 404 is connected to the lowest point of the covering tube 401, and the other end of the return pipe 404 is connected to the top of the water inlet pipe 200, so that the squeezed sewage can flow back to the interior of the treatment tank 100 through the water inlet pipe 200. A conical ring 402 is fixedly installed between the top of the covering tube 401 and the top of the delivery vertical pipe 303. A mud bucket 403 is welded to the outside of the upper half of the covering tube 401. The sludge squeezed out from the top of the vertical conveying pipe 303 is guided by the sludge discharge bucket 403 so that the dried sludge falls into the sludge discharge bucket 403 and is then discharged through the sludge discharge bucket 403 .

[0022] See also Figure 5 and Figure 6 The scraper assembly 500 includes a hollow drum 501 fixedly mounted on the outside of the rotating shaft 305. The hollow drum 501 is located above the tapered ring 402. Two inclined grooves 502 are defined on the circumference of the hollow drum 501, located on the front and rear sides of the hollow drum 501. The top ends of the two inclined grooves 502 are connected by an upper arc groove 503, and the bottom ends of the two inclined grooves 502 are connected by a lower arc groove 504. When the motor 307 drives the rotating shaft 305 to rotate, the hollow drum 501 is driven to rotate synchronously.

[0023] The scraper assembly 500 also includes an arch 505 fixedly mounted on top of the mud bucket 403. The motor 307 is fixedly mounted on top of the arch 505. A bracket 506 is slidably connected to the arch 505. A collar 507 is provided in the middle of the bracket 506. The collar 507 is mounted on the outside of the hollow drum 501. A sliding ball 508 is fixedly mounted on the inner wall of the collar 507. The sliding ball 508 is slidably connected to the inclined groove 502, the upper arc groove 503, and the lower arc groove 504. When the hollow drum 501 rotates, it drives the bracket 506 to move back and forth along the arch 505.

[0024] A connecting rod 509 is fixedly mounted on the right side of the collar 507. The connecting rod 509 is slidably connected to the conical ring 402. A scraper ring 510 is fixedly mounted on the bottom end of the connecting rod 509. The scraper ring 510 is sleeved on the outer side of the upper half of the delivery vertical pipe 303. Steel wire bristles are fixed to the inner wall of the scraper ring 510, and the steel wire bristles are in contact with the surface of the delivery vertical pipe 303. The connection of the connecting rod 509 drives the scraper ring 510 to move back and forth on the delivery vertical pipe 303. The steel wire bristles continuously rub against the drain slit 304, scraping off the sludge particles stuck in the drain slit 304.

[0025] See also Figure 5 and Figure 6 The exhaust assembly 600 includes two V-shaped plates 601 fixedly mounted on the left and right sidewalls of the treatment tank 100. A diamond-shaped plate 602 is fixedly mounted in the middle of the treatment tank 100, located between the two V-shaped plates 601. An exhaust hood 603 is installed at the top of the treatment tank 100, located directly above the V-shaped plates 601 and 602. An exhaust pipe 604 is connected to the top of the exhaust hood 603. The V-shaped plates 601 and diamond-shaped plates 602 work together to guide the biogas in the sewage into the exhaust hood 603 and finally discharge through the exhaust pipe 604.

[0026] The drainage assembly 700 includes a drain trough 701 fixedly mounted on the top rear side of the treatment tank 100. An overflow port 702 is provided at the top rear side of the treatment tank 100, communicating with the drain trough 701. The bottom wall of the overflow port 702 is lower than the bottom wall of the drain slot 304. Sewage from the upper layer flows through the overflow port 702 into the drain trough 701 and is then discharged through the drain trough 701.

[0027] During use, wastewater generated by pig farming is transported to the interior of the treatment tank 100 through the water inlet pipe 200. The sludge in the suspended sludge area in the middle of the treatment tank 100 passes through the connecting groove 302 and enters the sludge discharge pipe 301. The motor 307 drives the rotating shaft 305 to rotate, and the spiral blades 306 transport the sludge upward. As the pitch of the spiral blades 306 decreases, the pressure on the sludge increases, and the sewage inside the sludge is squeezed out. The sewage passes through the drain slit 304 and enters the coating cylinder 401. The sewage enters the water inlet pipe 200 through the return pipe 404 and flows back to the interior of the treatment tank 100. During the rotation of the rotating shaft 305, the hollow rotating drum 501 is driven to rotate synchronously, and the sliding ball 508 slides along the inclined groove 502, the upper arc groove 503 and the lower arc groove 504, driving the bracket 506 to move back and forth up and down, and cooperates with the connecting action of the connecting rod 509 to make the scraper ring 510 slide back and forth on the outside of the conveying vertical pipe 303, and the wire bristles in the scraper ring 510 scrape off the sludge particles stuck in the drain seam 304.

[0028] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An airlift internal circulation anaerobic aerobic device for large-scale piggery wastewater treatment, comprising a treatment tank (100), characterized in that: A water inlet pipe (200) is fixedly installed on the bottom side of the treatment tank (100), a mud discharge assembly (300) is fixedly passed through the middle side of the treatment tank (100), a return assembly (400) is provided between the mud discharge assembly (300) and the water inlet pipe (200), a mud scraping assembly (500) is attached to the surface of the mud discharge assembly (300), an exhaust assembly (600) is fixedly installed in the upper half of the treatment tank (100), and a drainage assembly (700) is provided on the top rear side of the treatment tank (100).

2. The airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment according to claim 1, characterized in that: The water inlet pipe (200) penetrates into the interior of the treatment tank (100), and a water inlet (201) is provided in an array on the upper surface of the water inlet pipe (200). A baffle plate (202) is fixedly installed on the inner wall of the bottom of the treatment tank (100), and the baffle plate (202) is located on the upper side of the water inlet pipe (200), and the arc center of the baffle plate (202) coincides with the axis of the water inlet pipe (200).

3. The airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment according to claim 1, characterized in that: The mud discharge assembly (300) comprises a mud discharge pipe (301) which is fixed through the middle of the treatment tank (100), a connecting groove (302) is provided in an array on the surface of the mud discharge pipe (301), a vertical conveying pipe (303) is connected to the left end of the mud discharge pipe (301), the vertical conveying pipe (303) is perpendicular to the mud discharge pipe (301), a drainage slit (304) is provided in an array on the upper half of the surface of the vertical conveying pipe (303), a rotating shaft (305) is provided through the center of the vertical conveying pipe (303), a spiral blade (306) is welded on the surface of the rotating shaft (305), the pitch of the spiral blade (306) gradually decreases from bottom to top, and a motor (307) is connected to the top of the rotating shaft (305).

4. The airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment according to claim 1, characterized in that: The return flow assembly (400) comprises a covering cylinder (401) sleeved on the outside of the upper half of the delivery vertical pipe (303); the delivery vertical pipe (303) is fixed at the center of the bottom of the covering cylinder (401); a conical ring (402) is fixed between the top of the covering cylinder (401) and the top of the delivery vertical pipe (303); a return flow pipe (404) is connected to the lowest point of the covering cylinder (401); the other end of the return flow pipe (404) is connected to the top of the water inlet pipe (200); and a mud discharge bucket (403) is welded to the outside of the upper half of the covering cylinder (401).

5. The airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment according to claim 1, characterized in that: The scraper assembly (500) includes a hollow rotating drum (501) fixedly mounted on the outside of the rotating shaft (305), the hollow rotating drum (501) being located above the conical ring (402), and two inclined grooves (502) being provided on the circumferential surface of the hollow rotating drum (501), the two inclined grooves (502) being located at the front and rear sides of the hollow rotating drum (501), respectively, the top ends of the two inclined grooves (502) being connected via an upper arc groove (503), and the bottom ends of the two inclined grooves (502) being connected via a lower arc groove (504); The scraper assembly (500) further comprises an arch frame (505) fixedly mounted on the top of the mud bucket (403), a motor (307) fixedly mounted on the top of the arch frame (505), a bracket (506) slidably connected to the arch frame (505), a collar (507) being provided in the middle of the bracket (506), the collar (507) being sleeved on the outside of the hollow rotating drum (501), a sliding ball (508) being fixedly mounted on the inner wall of the collar (507), and the sliding ball (508) being slidably connected in the inclined groove (502), the upper arc groove (503) and the lower arc groove (504); A connecting rod (509) is fixedly installed on the right side of the collar (507), and the connecting rod (509) is slidably connected to the conical ring (402). A scraping ring (510) is fixedly installed on the bottom end of the connecting rod (509), and the scraping ring (510) is sleeved on the outer side of the upper half of the delivery vertical pipe (303). Steel wire bristles are fixed on the inner wall of the scraping ring (510), and the steel wire bristles are attached to the surface of the delivery vertical pipe (303).

6. The air lift type internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment according to claim 1, characterized in that: The exhaust assembly (600) includes two V-shaped plates (601) fixedly mounted on the left and right side walls of the treatment tank (100), a diamond plate (602) fixedly mounted in the middle of the treatment tank (100), the diamond plate (602) being located between the two V-shaped plates (601), an exhaust hood (603) being provided in the top of the treatment tank (100), the exhaust hood (603) being located directly above between the V-shaped plate (601) and the diamond plate (602), and an exhaust pipe (604) being connected to the top of the exhaust hood (603).

7. The airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment according to claim 1, characterized in that: The drainage assembly (700) comprises a drainage trough (701) fixedly mounted on the top rear side of the treatment tank (100), an overflow port (702) is provided on the top rear side of the treatment tank (100), and the overflow port (702) is communicated with the drainage trough (701).

8. The airlift internal circulation anaerobic aerobic device for large-scale pig farming wastewater treatment according to claim 7, characterized in that: The bottom wall of the overflow port (702) is lower than the bottom wall of the drain seam (304).

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