Domestic sewage treatment device with upward flow self-cleaning sludge filter bed

Abstract

The utility model discloses an upward flow self-cleaning sludge filter bed domestic sewage treatment device which comprises a V-shaped folded plate, the interior of the treatment device is sequentially divided into an anaerobic tank, a sludge bed filter tank and an aerobic tank by the V-shaped folded plate, and an inner aeration system and a plurality of outer aeration systems are arranged in the bottom of the aerobic tank; the inner aeration system comprises an inner aeration disc and a plurality of inner aeration heads inclined upwards along the tangential direction of the inner aeration disc, and an aeration pump communicated with the inner aeration disc is arranged outside the aerobic tank; the outer aeration system comprises an outer aeration disc and a plurality of outer aeration heads which are upwards inclined along the tangential direction of the outer aeration disc, and the outer aeration disc is communicated with the inner aeration disc through a pipeline respectively. An inner aeration system and an outer aeration system are arranged, so that aeration in the aerobic tank is uniform, and dead zones are not easy to generate; the inner aeration nozzle and the outer aeration nozzle are inclined upwards, so that sludge scales are not easy to enter the nozzles, the nozzles are not easy to block, the stirring disturbance on sewage is large, and the full contact of activated sludge, dissolved oxygen and organic matters is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of domestic sewage treatment, in particular to a domestic sewage treatment device with an upward flow self-cleaning sludge filter bed. Background Art

[0002] The upflow sludge filter bed process is a new type of integrated sewage biological treatment process, which integrates anaerobic tanks, aerobic tanks and upflow sludge filter tanks. It has a compact structure, flexible operation, and is easy to modularize and serialize production.

[0003] The aerator in the aerobic tank of the existing upward flow sludge filter bed device is a microporous aerator, and its working principle is to squeeze air and escape from the micropores of the rubber diaphragm to form tiny bubbles that diffuse into the water; however, after the microporous aerator has been used for a period of time, sludge and other scale will block the micropores, causing the wind pressure and energy consumption to increase, and the oxygen utilization rate will decrease after damage; at the same time, the air discharged from the microporous aerator escapes straight upward, and a dead zone will be generated near the inner wall of the aerobic tank, resulting in uneven aeration. Utility Model Content

[0004] The utility model aims to provide an upward flow self-cleaning sludge filter bed domestic sewage treatment device to solve the problems of easy clogging and uneven aeration of the microporous aerator after long-term use in the prior art.

[0005] In order to achieve the above utility model purpose, the technical solution of the utility model is:

[0006] An upward flow self-cleaning sludge filter bed domestic sewage treatment device comprises a V-shaped folded plate arranged in the treatment device, the V-shaped folded plate divides the inside of the treatment device into an anaerobic tank, a sludge bed filter tank and an aerobic tank in sequence, an inner aeration system and a plurality of outer aeration systems are arranged in the bottom of the aerobic tank, the inner aeration system is located in the middle of the aerobic tank and is connected to the anaerobic tank through a pipeline, and the plurality of outer aeration systems are evenly spaced along the outer periphery of the inner aeration system; the inner aeration system comprises an inner aeration plate and a plurality of inner aeration heads inclined upward along the tangent direction of the inner aeration plate, an aeration pump is arranged outside the aerobic tank, and the aeration pump is connected to the inner aeration plate through an aeration pipe; the outer aeration system comprises an outer aeration plate and a plurality of outer aeration heads inclined upward along the tangent direction of the outer aeration plate, and the outer aeration plate is respectively connected to the inner aeration plate through a pipeline. Internal and external aeration systems are set up to allow aeration to occur in the middle and outer part of the aerobic pool. The aeration in the aerobic pool is uniform and there are no dead corners. The internal and external aeration nozzles are tilted upward to prevent sludge scale from entering the nozzles and clogging. The gas rotates and sprays upward, which has a strong impact force and causes a large disturbance to the sewage stirring, which is beneficial to the full contact between activated sludge, dissolved oxygen and organic matter, and can further promote the upward flow of sewage.

[0007] Preferably, the lower end of the V-shaped folded plate is provided with a through hole connected to the aerobic tank, and a diversion channel connected to the through hole is obliquely arranged in the aerobic tank, and the opening of the diversion channel faces upward. The diversion channel can limit the water inlet height in the sludge bed filter tank to avoid short-circuiting; it can also introduce sewage in the aerobic tank to the bottom of the sludge bed filter tank.

[0008] Preferably, the outer aeration head is inclined in the opposite direction to the inner aeration head. The inner and outer aeration heads are inclined in opposite directions, and the gases ejected from the adjacent inner and outer aeration heads impact and disperse each other, so that the gas has a large diffusion range and fully contacts with the sewage.

[0009] Preferably, a reflux stirring device is provided in the anaerobic tank, and the reflux stirring device includes a No. 1 motor, a transmission mechanism, a stirring shaft, a reflux pump, a reflux pipe, a rotary joint and a paddle; the No. 1 motor is arranged vertically outside the top of the anaerobic tank, the stirring shaft is placed vertically in the anaerobic tank and penetrates the inside from top to bottom, the stirring shaft is connected to the No. 1 motor through a transmission mechanism, and the paddle is fixed on the side wall of the stirring shaft; one end of the rotary joint is connected to the upper end of the stirring shaft, and the other end is connected to the outlet of the reflux pump; one end of the reflux pipe is connected to the inlet of the reflux pump, and the other end is connected to the lower end of the V-shaped folded plate. The reflux stirring device can return the activated sludge in the sludge bed filter tank to the anaerobic tank while stirring and mixing the sludge in the anaerobic tank with the returned activated sludge to ensure the efficiency and stability of the anaerobic digestion process.

[0010] Preferably, the transmission mechanism comprises a meshing driving gear and a driven gear, wherein the driving gear is fixedly connected to the rotor of motor No. 1, and the driven gear is fixed on the stirring shaft.

[0011] Preferably, the paddle is provided with a plurality of small holes, which can reduce the resistance of the sewage in the anaerobic zone to the paddle, and the paddle stirring is more labor-saving.

[0012] Preferably, the front end of the anaerobic tank is connected to a pretreatment tank, and the end of the pretreatment tank away from the anaerobic tank is connected to a sewage inlet pipe, a bar screen is vertically arranged in the pretreatment tank, a scraping mechanism is arranged on the side of the bar screen away from the sewage inlet pipe, and a receiving hopper with an upward opening is arranged between the sewage inlet pipe and the bar screen, and the opening of the receiving hopper is lower than the height of the bar screen. The bar screen is arranged to intercept larger solid impurities in domestic sewage; the scraping mechanism is used to clean the intercepted solid impurities into the receiving hopper to prevent the solid impurities from being brought back, thereby improving the working efficiency of the sewage treatment device.

[0013] Preferably, the scraper mechanism includes two sets of chain drives, a No. 2 motor, an extension plate, a plurality of rake teeth and a transmission shaft; the transmission shaft is arranged in parallel with the bar screen, the two sets of chain drives are respectively located at both ends of the transmission shaft, and both include a driving sprocket, a driven sprocket arranged up and down, and an annular chain wound around the driving sprocket and the driven sprocket, the extension plate is arranged in parallel with the transmission shaft, the two driving sprockets are respectively installed at both ends of the transmission shaft, one end of the transmission shaft passes through the pretreatment tank and is fixedly connected to the rotor of the No. 2 motor arranged on the outer wall of the pretreatment tank, and the two driven sprockets are respectively installed on the inner wall of the pretreatment tank; the two ends of the extension plate are respectively fixed to the outside of the two annular chains, and the opening of the extension plate faces outward, the lower end of the extension plate is inclined downward, the rake teeth are evenly spaced along the length direction of the lower end of the extension plate, and each rake tooth is placed in the gap between adjacent bars of the bar screen.

[0014] Preferably, a cleaning mechanism is provided at the opening of the pretreatment tank, and the cleaning mechanism is located above the bar screen. The cleaning mechanism includes a scraper, two cylinders and two rocker arms; the scraper is arranged parallel to the transmission shaft, the two cylinders are respectively located at both ends of the scraper and fixed on the inner wall of the pretreatment tank, the two rocker arms are respectively located at the two cylinders, and one end of the rocker arm is rotatably connected to the inner wall of the pretreatment tank, and the other end is fixedly connected to the end of the scraper, and the piston rod end of the cylinder is rotatably connected to the side wall of the rocker arm.

[0015] Preferably, a screw conveyor is provided in the receiving hopper.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model is provided with an internal and external aeration system, so that aeration can be generated in the middle and the periphery of the aerobic pool, and the aeration in the aerobic pool is uniform without dead corners; the internal and external aeration nozzles are arranged to be tilted upward, so that sludge scaling is not easy to enter the nozzles, and the nozzles are not easy to be blocked, and the gas is rotated and sprayed upward, with a large impact force, which greatly disturbs the sewage stirring, is conducive to the full contact of the activated sludge, dissolved oxygen and organic matter, and can further promote the upward flow of sewage; the internal and external aeration heads are tilted in opposite directions, and the gases sprayed from the adjacent internal and external aeration heads impact and disperse each other, so that the gas diffusion range is large and fully contacts with the sewage.

[0018] 2. The diversion channel provided in the utility model can limit the water inlet height in the sludge bed filter tank to avoid short-circuiting; it can also introduce the sewage in the aerobic tank into the bottom of the sludge bed filter tank.

[0019] 3. The utility model is provided with a reflux stirring device, which can return the activated sludge in the sludge bed filter tank to the anaerobic tank while stirring and mixing the sludge in the anaerobic tank with the returned activated sludge to ensure the efficiency and stability of the anaerobic digestion process.

[0020] 4. The utility model is provided with a scraping mechanism, which can intercept larger solid impurities in domestic sewage and prevent the larger solid impurities from clogging the sewage treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a schematic diagram of the structure of chain drive and rake teeth.

[0023] Figure 3 It is a schematic diagram of the structure of the internal aeration system and the external aeration system.

[0024] In the figure:

[0025] 1. Anaerobic tank; 2. Sludge bed filter tank; 21. V-shaped folded plate; 22. Diversion channel; 3. Aerobic tank; 31. Aeration pump; 32. Aeration pipe; 4. Pretreatment tank; 41. Bar screen; 42. Receiving hopper; 43. Screw conveyor; 44. Sewage inlet pipe; 5. Internal aeration system; 51. Internal aeration plate; 52. Internal aeration head; 6. External aeration system; 61. External aeration plate; 62. External aeration head; 7. Reflux stirring device ;71. Motor No. 1;72. Agitator shaft;73. Reflux pump;74. Reflux pipe;75. Rotary joint;76. Paddle plate;761. Small hole;8. Transmission mechanism;81. Driving gear;82. Driven gear;9. Scraper mechanism;91. Chain drive;92. Motor No. 2;93. Extension plate;94. Rake teeth;95. Transmission shaft;10. Cleaning mechanism;101. Cylinder;102. Rocker arm;103. Scraper. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0027] The described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1

[0029] like Figure 1As shown, an upward flow self-cleaning sludge filter bed domestic sewage treatment device includes a V-shaped folded plate 21 arranged in the treatment device, and the V-shaped folded plate 21 divides the interior of the treatment device into an anaerobic tank 1, a sludge bed filter tank 2 and an aerobic tank 3 in sequence; wherein the anaerobic tank 1 is connected to the aerobic tank 3, and a through hole connected to the aerobic tank 3 is opened at the lower end of the V-shaped folded plate 21, and a guide channel 22 connected to the through hole is obliquely arranged in the aerobic tank 3, and the opening of the guide channel 22 faces upward.

[0030] like Figure 1 As shown, the front end of the anaerobic tank 1 is connected to the pretreatment tank 4, and the end of the pretreatment tank 4 away from the anaerobic tank 1 is connected to the sewage inlet pipe 44, and a bar screen 41 is vertically arranged in the pretreatment tank 4, and a receiving hopper 42 with an upward opening is arranged between the sewage inlet pipe 44 and the bar screen 41, and the opening of the receiving hopper 42 is lower than the height of the bar screen 41, and the receiving hopper 42 is inclined on the side close to the bar screen 41, and a screw conveyor 43 is arranged in the receiving hopper 42, and the screw conveyor 43 is a prior art, including a driving device and a screw fixedly connected to the driving device.

[0031] like Figure 1 and Figure 2 As shown, a scraper mechanism 9 is provided on the side of the bar screen 41 away from the sewage inlet pipe 44, and the scraper mechanism 9 includes two sets of chain drives 91, a second motor 92, an extension plate 93, a plurality of rake teeth 94 and a transmission shaft 95. The transmission shaft 95 is arranged in parallel with the bar screen 41, and the two sets of chain drives 91 are respectively located at both ends of the transmission shaft 95, and both include a driving sprocket and a driven sprocket arranged up and down, and an annular chain wound on the driving sprocket and the driven sprocket, and the extension plate 93 is arranged in parallel with the transmission shaft 95, and the two driving sprockets are respectively installed at both ends of the transmission shaft 95, and one end of the transmission shaft 95 passes through the pretreatment tank 4 and is fixedly connected to the rotor of the second motor 92 arranged on the outer wall of the pretreatment tank 4, and the two driven sprockets are respectively rotatably installed on the inner wall of the pretreatment tank 4. The two ends of the extension plate 93 are respectively fixed on the outside of the two ring chains, and the openings face outward; the lower end of the extension plate 93 is tilted downward, and the rake teeth 94 are evenly spaced along the length direction of the lower end of the extension plate 93, and each rake tooth 94 is placed in the gap between adjacent bars of the bar screen 41.

[0032] like Figure 1As shown, a cleaning mechanism 10 located above the bar screen 41 is provided at the opening of the pretreatment tank 4, and the cleaning mechanism 10 includes a scraper 103, two cylinders 101 and two rocker arms 102; the scraper 103 is arranged parallel to the transmission shaft 95, the two cylinders 101 are respectively located at both ends of the scraper 103 and fixed on the inner wall of the pretreatment tank 4, the two rocker arms 102 are respectively located at the two cylinders 101, and one end of the rocker arm 102 is rotatably connected to the inner wall of the pretreatment tank 4, and the other end is fixedly connected to the end of the scraper 103, and the piston rod end of the cylinder 101 is rotatably connected to the side wall of the rocker arm 102.

[0033] like Figure 1 As shown, a reflux stirring device 7 is provided in the anaerobic tank 1, and the reflux stirring device 7 includes a No. 1 motor 71, a transmission mechanism 8, a stirring shaft 72, a reflux pump 73, a reflux pipe 74, a rotary joint 75 and a paddle 76. Among them, the transmission mechanism 8 includes a meshing driving gear 81 and a driven gear 82, the driving gear 81 is fixedly connected to the rotor of the No. 1 motor 71, and the driven gear 82 is fixed on the stirring shaft 72. The No. 1 motor 71 is vertically arranged outside the top of the anaerobic tank 1, the stirring shaft 72 is vertically placed in the anaerobic tank 1 and penetrates the inside from top to bottom, the paddle 76 is fixed on the outer side wall of the stirring shaft 72, and a plurality of small holes 761 are opened on the paddle 76. The reflux pump 73 is arranged outside the anaerobic tank 1, one end of the reflux pipe 74 is connected to the inlet of the reflux pump 73, and the other end is connected to the lower end of the V-shaped folded plate 21; one end of the rotary joint 75 is connected to the upper end of the stirring shaft 72, and the other end is connected to the outlet of the reflux pump 73.

[0034] like Figure 1 and Figure 3 As shown, an aeration pump 31 is arranged outside the aerobic pool 3, an internal aeration system 5 is arranged in the middle of the bottom of the aerobic pool 3, and a plurality of external aeration systems 6 are evenly spaced and distributed on the periphery of the internal aeration system 5. The internal aeration system 5 includes an internal aeration plate 51 connected to the aeration pump 31 through an aeration pipe 32 and a plurality of internal aeration heads 52 tilted upward along the tangent direction of the internal aeration plate 51. The external aeration system 6 includes an external aeration plate 61 connected to the internal aeration plate 51 through a pipeline and a plurality of external aeration heads 62 tilted upward along the tangent direction of the external aeration plate 61, and the tilt direction of the external aeration heads 62 is opposite to that of the internal aeration heads 52.

[0035] In summary,

[0036] When the domestic sewage treatment device is in use, the sewage enters through the sewage inlet pipe 44, is filtered by the bar screen 41 and enters the pretreatment tank 4, then enters the anaerobic tank 1 and is fully mixed with the activated sludge returned from the return pipe 74, and enters the aerobic tank 3 after reaction in the anaerobic tank 1; at this time, the aeration pump 31 works to transport air to the internal aeration system 5 and the external aeration system 6, and then is discharged from the internal aeration head 52 and the external aeration head 62 respectively, to replenish sufficient dissolved oxygen to the aerobic tank 3; the sewage in the aerobic tank 3 enters the bottom of the sludge bed filter tank 2 along the diversion channel 22, and biological flocculation and filtration interception occur in the sludge filter bed. After mud and water separation, the clarified liquid on the upper part of the sludge bed filter tank 2 is discharged, and the activated sludge is returned to the anaerobic tank 1 through the return pipe 74.

[0037] In the above process, the solid impurities intercepted by the bar screen 41 are scraped off by the scraper mechanism 9. The specific operation method is: the No. 2 motor 92 drives the transmission shaft 95 to rotate, thereby driving the active sprocket, the ring chain and the driven sprocket to rotate, and the rake teeth 94 are stuck in the gap of the bar screen 41. The extension plate 93 moves upward with the ring chain to scrape off the solid impurities and drive them to the upper end of the bar screen 41; then the cylinder 101 works, and the piston rod pushes the rocker rod 102 to swing, driving the scraper 103 to swing into the extension plate 93, and then the piston rod of the cylinder 101 retracts, and the scraper 103 scrapes the solid impurities on the extension plate 93 into the receiving hopper 42, and finally the fixed impurities are transported to the outside of the pretreatment tank 4 through the screw conveyor 43.

[0038] The working process of the reflux stirring device 7 in the anaerobic tank 1 is as follows: the No. 1 motor 71 drives the driving gear 81 to drive the driven gear 82 to rotate, and then drives the stirring shaft 72 and the paddle 76 to stir the sewage in the anaerobic tank 1; during this process, the activated sludge in the sludge bed filter tank 2 enters the hollow stirring shaft 72 through the reflux pump 73 and the reflux pipe 74, and then is discharged into the anaerobic tank 1 and is fully mixed with the sewage in the anaerobic tank 1.

[0039] The described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. An upward flow self-cleaning sludge filter bed domestic sewage treatment device, comprising a V-shaped folded plate arranged in the treatment device, wherein the V-shaped folded plate divides the interior of the treatment device into an anaerobic tank, a sludge bed filter tank and an aerobic tank in sequence, characterized in that: An internal aeration system and a plurality of external aeration systems are arranged at the bottom of the aerobic tank, wherein the internal aeration system is located in the middle of the aerobic tank and is connected to the anaerobic tank through a pipeline, and the plurality of external aeration systems are evenly spaced and distributed along the periphery of the internal aeration system; The internal aeration system includes an internal aeration plate and a plurality of internal aeration heads inclined upward along the tangent direction of the internal aeration plate. An aeration pump is arranged outside the aerobic pool, and the aeration pump is connected to the internal aeration plate through an aeration pipe. The external aeration system comprises an external aeration plate and a plurality of external aeration heads inclined upward along the tangent direction of the external aeration plate. The external aeration plates are connected with the internal aeration plates through a pipeline respectively.

2. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 1 is characterized in that: The inclination direction of the outer aeration head is opposite to the inclination direction of the inner aeration head.

3. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 2 is characterized in that: A through hole connected to the aerobic pool is opened at the lower end of the V-shaped folded plate, and a diversion channel connected to the through hole is obliquely arranged in the aerobic pool, and the opening of the diversion channel faces upward.

4. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 2 is characterized in that: The anaerobic tank is provided with a reflux stirring device, which includes a No. 1 motor, a transmission mechanism, a stirring shaft, a reflux pump, a reflux pipe, a rotary joint and a paddle; The first motor is arranged vertically outside the top of the anaerobic tank, the stirring shaft is placed vertically in the anaerobic tank and penetrates the inside from top to bottom, the stirring shaft is connected to the first motor through a transmission mechanism, and the paddle is fixed on the side wall of the stirring shaft; One end of the rotary joint is connected to the upper end of the stirring shaft, and the other end is connected to the outlet of the reflux pump; one end of the reflux pipe is connected to the inlet of the reflux pump, and the other end is connected to the lower end of the V-shaped folded plate.

5. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 4 is characterized in that: The transmission mechanism comprises a meshing driving gear and a driven gear, wherein the driving gear is fixedly connected to the rotor of the first motor, and the driven gear is fixed on the stirring shaft.

6. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 5 is characterized in that: The dial plate is provided with a plurality of small holes.

7. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 1 is characterized in that: The front end of the anaerobic tank is connected to a pretreatment tank, and one end of the pretreatment tank away from the anaerobic tank is connected to a sewage inlet pipe. A bar screen is vertically arranged in the pretreatment tank, and a scraping mechanism is arranged on the side of the bar screen away from the sewage inlet pipe. A receiving hopper with an upward opening is arranged between the sewage inlet pipe and the bar screen, and the opening of the receiving hopper is lower than the height of the bar screen.

8. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 7 is characterized in that: The scraping mechanism includes two sets of chain drives, a No. 2 motor, an extension plate, a plurality of rake teeth and a transmission shaft; the transmission shaft is arranged in parallel with the bar screen, and the two sets of chain drives are respectively located at both ends of the transmission shaft, and both include a driving sprocket and a driven sprocket arranged up and down, and an annular chain wound around the driving sprocket and the driven sprocket, the extension plate is arranged in parallel with the transmission shaft, and the two driving sprockets are respectively installed at both ends of the transmission shaft, and one end of the transmission shaft passes through the pretreatment tank and is fixedly connected to the rotor of the No. 2 motor arranged on the outer wall of the pretreatment tank, and the two driven sprockets are respectively installed on the inner wall of the pretreatment tank; The two ends of the extension plate are respectively fixed on the outside of the two ring chains, and the opening of the extension plate faces outward. The lower end of the extension plate is tilted downward, and the rake teeth are evenly spaced along the length direction of the lower end of the extension plate, and each rake tooth is placed in the gap between adjacent bars of the bar screen.

9. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 8, characterized in that: A cleaning mechanism is provided at the opening of the pretreatment tank, the cleaning mechanism is located above the bar screen, and the cleaning mechanism includes a scraper, two cylinders and two swing rods; The scraper is arranged parallel to the transmission shaft, the two cylinders are respectively located at the two ends of the scraper and fixed on the inner wall of the pretreatment tank, the two swing rods are respectively located at the two cylinders, and one end of the swing rod is rotatably connected to the inner wall of the pretreatment tank, and the other end is fixedly connected to the end of the scraper, and the piston rod end of the cylinder is rotatably connected to the side wall of the swing rod.

10. The upward flow self-cleaning sludge filter bed domestic sewage treatment device according to claim 9, characterized in that: A screw conveyor is arranged in the receiving hopper.

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