AAO-process sewage treatment equipment convenient for cleaning settled sludge

Abstract

The utility model relates to the field of sewage treatment equipment, and discloses AAO (anaerobic-anoxic-oxic) method sewage treatment equipment convenient for cleaning settled sludge, which comprises a treatment box, three partition plate fixing frames are fixedly connected in the treatment box, and partition plates are slidably connected in the partition plate fixing frames. The interior of the treatment box is sequentially divided into an anaerobic zone, an anoxic zone, an aerobic zone and a sediment clarification zone from left to right by the three partition plates, a desilting assembly is arranged on the outer wall of the right side of the treatment box, an air stripping assembly is arranged in the sediment clarification zone, and the desilting assembly comprises a water outlet and a cylinder; the water outlet and the barrel are both mounted on the outer wall of the right side of the treatment box, an impeller is rotationally connected to the interior of the water outlet, and a rotating shaft is fixedly connected to the bottom of the impeller. According to the utility model, through the water pipe connected with the one-way valve in the desilting assembly and the spray head on the inner wall of the right side of the treatment box, the inside of the treatment box can be cleaned by utilizing pumped water in the sediment clarification area, so that dirt accumulation is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment equipment field especially, it is a kind of AAO method sewage treatment equipment of sediment sludge convenient to clean up. BACKGROUND

[0002] In the sewage treatment process, dirt accumulation is prone to occur inside the equipment. Due to the lack of effective self-cleaning mechanism, dirt will adhere to the inner wall of the treatment tank, the partition plate and the surface of various components. These dirt not only reduces the effective volume of the equipment, affects the normal flow of sewage and the treatment effect, but also can breed bacteria, algae and other microorganisms, further deteriorate the treatment environment, cause the treatment efficiency to gradually decrease, the water quality purification is not up to standard, and even can cause equipment failure, increase maintenance cost and downtime, seriously affect the continuity and stability of sewage treatment, shorten the service life of the equipment, therefore, an AAO method sewage treatment equipment convenient to clean up sediment sludge is proposed. SUMMARY

[0003] In order to make up for the above shortcomings, the utility model provides an AAO method sewage treatment equipment convenient to clean up sediment sludge, aiming at improving the problem of lack of effective self-cleaning mechanism in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: an AAO method sewage treatment equipment convenient to clean up sediment sludge, comprising a treatment tank, three partition plate fixing frames are fixedly connected inside the treatment tank, a partition plate is slidably connected inside the partition plate fixing frame, three partition plates divide the inside of the treatment tank into an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation and clarification zone from left to right in turn, a dredging assembly is arranged on the right outer wall of the treatment tank, and a gas stripping assembly is arranged inside the sedimentation and clarification zone.

[0005] The dredging assembly comprises a water outlet and a cylinder body, the water outlet and the cylinder body are both mounted on the right outer wall of the treatment tank, a impeller is rotatably connected inside the water outlet, a rotating shaft is fixedly connected to the bottom of the impeller, an eccentric wheel is fixedly connected to the bottom of the rotating shaft, a sliding rod is slidably connected inside the cylinder body, an extrusion plate is fixedly connected to one end of the sliding rod, a piston is fixedly connected to the other end of the sliding rod, a spring is sleeved outside the sliding rod, and two one-way valves are fixedly connected to the outer wall of the cylinder body.

[0006] As a further description of the above technical scheme:

[0007] The gas stripping assembly comprises an air inlet pipe, the air inlet pipe is mounted on the partition plate close to the sedimentation and clarification zone, an air inlet is formed in the top of the air inlet pipe, and a sludge backflow pipe, a gas conveying pipe and a clean water backflow pipe are fixedly connected to the bottom of the air inlet pipe.

[0008] As a further description of the above technical scheme:

[0009] The sludge return pipe is arranged inside the anaerobic zone away from the one end of the air inlet pipe, and a plurality of biological filling balls are arranged inside the anaerobic zone.

[0010] As a further description of the above technical solution:

[0011] The clear water return pipe is arranged inside the anoxic zone away from the one end of the air inlet pipe, and water level observation openings are arranged on the outer walls of the sludge return pipe and the clear water return pipe.

[0012] As a further description of the above technical solution:

[0013] The air supply pipe is fixedly connected with an aeration pipe away from the one end of the air inlet pipe, the aeration pipe is arranged inside the aerobic zone, and a bacterial population breeding frame is fixedly connected inside the aerobic zone.

[0014] As a further description of the above technical solution:

[0015] Two drainage openings are arranged on the outer wall bottom of the middle partition plate, and two drainage openings are arranged on the outer wall top of the other two partition plates.

[0016] As a further description of the above technical solution:

[0017] A plurality of spray heads are fixedly connected to the right inner wall of the treatment box, a water pipe is fixedly connected to the side away from the cylinder of the one-way valve, one of the water pipes is communicated with the spray heads, and the other water pipe is installed inside the upper side of the sedimentation and clarification zone.

[0018] As a further description of the above technical solution:

[0019] Two detection openings are arranged on the top of the treatment box, a water inlet opening is arranged on the left outer wall of the treatment box, an ultraviolet lamp is fixedly connected inside the water outlet opening, and three valves are fixedly connected to the outer wall of the air inlet pipe.

[0020] The utility model has the advantages of the following beneficial effects:

[0021] 1、In the utility model, the water pipe connected with the one-way valve in the dredging assembly and the spray heads on the right inner wall of the treatment box can clean the inside of the treatment box by using the extracted water in the sedimentation and clarification zone, effectively prevent dirt accumulation, maintain the cleanliness of the equipment, ensure the stability of the treatment process and the persistence of the treatment effect, and prolong the service life of the equipment.

[0022] 2、The utility model discloses, through the reasonable partition setting of anaerobic zone, anoxic zone, aerobic zone, realized the gradual removal of organic matter, nitrogen, phosphorus and other pollutants in sewage. The biological filling ball in anaerobic zone provides the attachment site for anaerobic microorganism, promotes organic matter decomposition and phosphorus release, and the anoxic zone utilizes the reflux sludge to carry out denitrification under the action of the gas stripping assembly, and the aerobic zone utilizes the aeration pipe and the bacterial population breeding frame to make the aerobic microorganism decompose organic matter and absorb phosphorus efficiently, and the synergistic effect of each region significantly improves the sewage purification efficiency, and ensures that the effluent quality reaches the standard. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A three-dimensional view of the AAO method sewage treatment equipment convenient for cleaning the precipitated sludge is provided for the utility model;

[0024] Figure 2 A bacterial population breeding frame schematic view of the AAO method sewage treatment equipment convenient for cleaning the precipitated sludge is provided for the utility model;

[0025] Figure 3 An air inlet pipe schematic view of the AAO method sewage treatment equipment convenient for cleaning the precipitated sludge is provided for the utility model;

[0026] Figure 4 A barrel cross-sectional view of the AAO method sewage treatment equipment convenient for cleaning the precipitated sludge is provided for the utility model.

[0027] Legend:

[0028] 1, treatment box, 2, partition fixed frame, 3, partition, 4, drain, 5, water inlet, 6, water outlet, 7, impeller, 8, rotating shaft, 9, eccentric wheel, 10, barrel, 11, slide bar, 12, extrusion plate, 13, piston, 14, spring, 15, check valve, 16, water pipe, 17, ultraviolet lamp, 18, spray head, 19, air inlet pipe, 20, air inlet, 21, sludge backflow pipe, 22, gas delivery pipe, 23, clean water backflow pipe, 24, valve, 25, water level observation port, 26, bacterial population breeding frame, 27, aeration pipe, 28, biological filling ball, 29, detection port. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0030] REFERENCE Figures 1-3The utility model provides an embodiment: a kind of AAO method sewage treatment equipment of sediment sludge convenient to clean, including processing box 1, processing box 1 is as the main body container of entire sewage treatment equipment, provides stable installation and operating space for each processing area and component in inside, its structural design can accommodate different processing process link, ensure that sewage orderly carries out anaerobic, anoxic, aerobic and sedimentation clarification etc.

[0031] With reference to Figures 2-4The dredging assembly comprises a water outlet 6 and a cylinder 10. The water outlet 6 is not only a channel for discharging the treated sewage from the treatment tank 1, but also a power trigger point of the dredging assembly. The cylinder 10 is a key component for realizing sludge pumping and discharging in the dredging assembly. The water outlet 6 and the cylinder 10 are both installed on the right outer wall of the treatment tank 1. The water outlet 6 is rotatably connected with an impeller 7 inside. The rotatable connection of the impeller 7 inside the water outlet 6 can drive the impeller 7 to rotate when the sewage flows through. The bottom of the impeller 7 is fixedly connected with a rotating shaft 8. When the impeller 7 rotates under the action of the water flow in the water outlet 6, the rotating shaft 8 can stably transmit the rotating motion of the impeller 7 to an eccentric wheel 9. The bottom of the rotating shaft 8 is fixedly connected with the eccentric wheel 9. Due to its eccentric structure, the eccentric wheel 9 will produce periodic displacement changes when rotating under the driving of the rotating shaft 8. The cylinder 10 is slidably connected with a sliding rod 11. The sliding rod 11 can smoothly reciprocate under the driving of the eccentric wheel 9. One end of the sliding rod 11 is fixedly connected with a pressing plate 12, which moves with the sliding rod 11. The other end of the sliding rod 11 is fixedly connected with a piston 13, which can reciprocate in the cylinder 10 under the driving of the sliding rod 11. The sliding rod 11 is externally sleeved with a spring 14. When the eccentric wheel 9 drives the sliding rod 11 to move in one direction, the spring 14 is compressed or stretched to store elastic potential energy. When the driving force of the eccentric wheel 9 disappears or changes direction, the spring 14 releases the elastic potential energy to push the sliding rod 11 to move in the opposite direction, ensuring that the sliding rod 11 can continuously and stably reciprocate. The outer wall of the cylinder 10 is fixedly connected with two one-way valves 15. One of the one-way valves 15 allows the water in the sedimentation and clarification zone to be sucked into the cylinder 10 under the negative pressure in the cylinder 10, and prevents the water from flowing back to the sedimentation and clarification zone. The other one-way valve 15 allows the compressed water in the cylinder 10 to be discharged to a designated position, preventing the discharged water from flowing back into the cylinder 10.

[0032] Referring to Figures 1-3, the gas stripping assembly includes an air inlet pipe 19 installed on the partition plate 3 near the sedimentation clarification zone, the air inlet pipe 19 serves as a gas conveying channel of the gas stripping assembly, and is installed on the partition plate 3 near the sedimentation clarification zone, so that the gas can be conveniently introduced into the bottom of the sedimentation clarification zone and fully contacted with the sediment sludge. An air inlet 20 is formed at the top of the air inlet pipe 19, and the air inlet 20 is an entrance for external gas to enter the air inlet pipe 19. The bottom of the air inlet pipe 19 is fixedly connected with a sludge backflow pipe 21, a gas conveying pipe 22 and a clear water backflow pipe 23. The sludge backflow pipe 21 is used to backflow part of the sludge in the sedimentation clarification zone to the anaerobic zone. In the anaerobic zone, the backflow sludge can provide abundant organic matter for the growth and reproduction of phosphorus accumulating bacteria, which is conducive to better absorption of phosphorus in the subsequent treatment process and improvement of phosphorus removal effect. The gas conveying pipe 22 conveys the gas to the anoxic zone to provide a gas environment for the denitrification of the anoxic zone, promote the reaction of nitrate nitrogen to nitrogen gas, and remove nitrogen pollutants in the sewage. The clear water backflow pipe 23 backflows part of the clear water in the sedimentation clarification zone to the aerobic zone, which can adjust the water level and water quality of the aerobic zone, maintain the growth environment of aerobic microorganisms, promote the decomposition of organic matter and the absorption of phosphorus by aerobic microorganisms, improve the treatment effect of the aerobic zone, and realize the recycling of substances in the sewage and the optimization of treatment effect through the cooperation of the backflow pipes.

[0033] With reference to Figure 2 and Figure 3 , one end of the sludge backflow pipe 21 away from the air inlet pipe 19 is arranged inside the anaerobic zone. The anaerobic zone enables the organic matter in the sludge to be decomposed and utilized by anaerobic microorganisms in an anaerobic environment. A plurality of biological filling balls 28 are arranged inside the anaerobic zone. Microorganisms are attached to the surface of the biological filling balls 28, which can more fully contact with the organic matter in the sewage and improve the decomposition efficiency of the organic matter.

[0034] With reference to Figure 2 and Figure 3 , one end of the clear water backflow pipe 23 away from the air inlet pipe 19 is arranged inside the anoxic zone. The clear water backflow pipe 23 conveys part of the relatively clear water after preliminary sedimentation treatment in the sedimentation clarification zone back to the anoxic zone. The backflow clear water can appropriately adjust the concentration and composition of the sewage. Water level observation openings 25 are formed in the outer walls of the sludge backflow pipe 21 and the clear water backflow pipe 23. The flow condition and water level height of the liquid in the pipes can be directly understood through the water level observation openings 25.

[0035] With reference to Figure 2 and Figure 3, the gas delivery pipe 22 is fixedly connected with an aeration pipe 27 at the end away from the gas inlet pipe 19, the gas delivery pipe 22 delivers the gas introduced from outside to the aerobic zone, and realizes uniform distribution and efficient use of the gas in the aerobic zone through the connection with the aeration pipe 27. The aeration pipe 27 is arranged inside the aerobic zone, and disperses the gas into tiny bubbles and releases the bubbles into the sewage. These tiny bubbles can greatly increase the contact area and contact time of oxygen and sewage, so that the dissolved oxygen content in the sewage is rapidly increased. The bacteria colony breeding frame 26 is fixedly connected inside the aerobic zone, which provides abundant attachment sites for aerobic microorganisms, so that the microorganisms can gather and grow on the surface of the bacteria colony breeding frame 26 to form a biofilm.

[0036] With reference to Figure 2 and Figure 3 , two drainage openings 4 are arranged at the bottom of the outer wall of the middle partition plate 3, and two drainage openings 4 are arranged at the top of the outer wall of the other two partition plates 3. The drainage openings 4 at the bottom of the outer wall of the middle partition plate 3 can make the sewage treated in the anoxic zone flow smoothly into the aerobic zone for further treatment. This bottom drainage method is beneficial to maintaining the water level of the anoxic zone stable, avoiding excessive disturbance of the water flow to the treatment process in the anoxic zone, so that the denitrification reaction in the anoxic zone can be carried out in a relatively stable environment. The other two drainage openings 4 arranged at the top of the outer wall of the other two partition plates 3 realize the transfer of sewage from the anaerobic zone to the anoxic zone and from the aerobic zone to the sedimentation and clarification zone, respectively.

[0037] With reference to Figure 2 and Figure 4 , a plurality of spray heads 18 are fixedly connected to the right inner wall of the treatment tank 1, and the water pipes 16 are fixedly connected to the side away from the cylinder 10 of the one-way valve 15. One of the water pipes 16 is in communication with the spray head 18, and when the dredging assembly is working, the water pipe 16 in communication with the spray head 18 delivers part of the water in the dredging process to the spray head 18, and the spray head 18 sprays the water in the form of mist to flush the inner wall of the treatment tank 1 and the internal components, remove the attached dirt and impurities, and prevent the accumulation of dirt from affecting the operation of the equipment and the treatment effect. The other water pipe 16 is installed inside the upper side of the sedimentation and clarification zone, which can flush the sedimentation and clarification zone to keep the sedimentation and clarification zone clean and improve the sedimentation effect and the overall operation stability of the equipment.

[0038] With reference to Figures 1-3The top of the treatment box 1 is provided with two detection openings 29, which facilitate the detection of water quality, sludge concentration and other parameters in each treatment area inside the treatment box 1. The left outer wall of the treatment box 1 is provided with a water inlet 5, which is the entrance of sewage into the treatment box 1, so that the sewage can enter the anaerobic zone uniformly, avoiding the influence of water flow impact on the microbial treatment process in the anaerobic zone. The inside of the water outlet 6 is fixedly connected with an ultraviolet lamp 17, which can disinfect and treat the treated sewage, killing pathogenic microorganisms in the sewage, so that the effluent water meets the sanitary standard. The outer wall of the air inlet pipe 19 is fixedly connected with three valves 24, which are respectively used to control the gas flow of the sludge backflow pipe 21, the air supply pipe 22 and the clean water backflow pipe 23. By adjusting the opening degree of the valve 24, the working state and flow size of each backflow pipe can be accurately controlled, realizing flexible operation of the air-lift assembly and precise regulation and control of the sewage treatment process.

[0039] Working principle: The sewage first enters the anaerobic zone from the water inlet 5 on the left outer wall of the treatment box 1. In the anaerobic zone, the organic matter in the sewage is preliminarily decomposed by anaerobic microorganisms in an oxygen-free environment, and phosphorus is released by phosphorus-accumulating organisms in this process, and part of the macromolecular organic matter is decomposed into small molecular organic matter.

[0040] After being treated in the anaerobic zone, the sewage enters the anoxic zone through the drain outlet 4 at the bottom of the outer wall of the middle partition plate 3. At this time, the air supply pipe 22 in the air-lift assembly delivers gas to the anoxic zone, and the gas is dispersed into small bubbles by the aeration pipe 27 to provide anoxic environment for the anoxic zone and promote water flow mixing. At the same time, in the anoxic zone, denitrifying bacteria convert nitrate nitrogen into nitrogen gas by using the organic matter in the backflow sludge, realizing denitrification treatment.

[0041] After being treated in the anoxic zone, the sewage flows into the aerobic zone through the drain outlet 4 at the top of the outer wall of the other partition plate 3. In the aerobic zone, the gas delivered by the air supply pipe 22 is aerated by the aeration pipe 27, so that the dissolved oxygen in the sewage is sufficient, and the aerobic microorganisms reproduce in large numbers on the bacterial population breeding frame 26 and decompose organic matter and absorb phosphorus and other pollutants.

[0042] After being treated in the aerobic zone, the sewage enters the sedimentation and clarification zone, where the solid suspended matter in the sewage is precipitated to form sludge. When the treated sewage flows out from the water outlet 6, the flow drives the impeller 7 to rotate, and the impeller 7 drives the eccentric wheel 9 to rotate through the rotating shaft 8, and the eccentric wheel 9 makes the slide rod 11 slide back and forth in the cylinder 10. The piston 13 on the slide rod 11 moves with the extrusion plate 12, when the slide rod 11 pulls outward, the piston 13 forms negative pressure in the cylinder 10, and the water in the sedimentation and clarification zone is sucked into the cylinder 10 through the one-way valve 15, then when the slide rod 11 pushes inward, the extrusion plate 12 exerts pressure on the water in the cylinder 10, so that it is discharged through the other one-way valve 15. The discharged water cleans the inside of the treatment box 1 through the water pipe 16 and the spray head 18.

[0043] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. An AAO sewage treatment device facilitating the cleaning of the settled sludge, comprising a treatment tank (1), characterized in that: The processing box (1) is internally fixedly connected with three partition plate fixing frames (2), the partition plate fixing frames (2) are internally slidably connected with partition plates (3), three partition plates (3) sequentially divide the inside of the processing box (1) from left to right into an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation and clarification zone, a dredging assembly is arranged on the right outer wall of the processing box (1), and a gas stripping assembly is arranged in the sedimentation and clarification zone; The dredging assembly comprises a water outlet (6) and a cylinder (10), the water outlet (6) and the cylinder (10) are both mounted on the right outer wall of the processing box (1), a impeller (7) is rotatably connected in the water outlet (6), the bottom of the impeller (7) is fixedly connected with a rotating shaft (8), the bottom of the rotating shaft (8) is fixedly connected with an eccentric wheel (9), a slide rod (11) is slidably connected in the cylinder (10), one end of the slide rod (11) is fixedly connected with a pressing plate (12), the other end of the slide rod (11) is fixedly connected with a piston (13), the slide rod (11) is externally sleeved with a spring (14), and the outer wall of the cylinder (10) is fixedly connected with two check valves (15).

2. The AAO process sewage treatment equipment convenient for cleaning the settled sludge according to claim 1, characterized in that: The gas stripping assembly comprises an air inlet pipe (19), the air inlet pipe (19) is mounted on the partition plate (3) close to the sedimentation and clarification zone, an air inlet (20) is formed in the top of the air inlet pipe (19), and a sludge backflow pipe (21), a gas conveying pipe (22) and a clean water backflow pipe (23) are fixedly connected to the bottom of the air inlet pipe (19).

3. The AAO process sewage treatment plant for facilitating the cleaning of the settled sludge according to claim 2, characterized in that: The sludge backflow pipe (21) is arranged in the anaerobic zone and away from the air inlet pipe (19), and a plurality of biological filling balls (28) are arranged in the anaerobic zone.

4. The AAO process sewage treatment plant for facilitating the cleaning of the settled sludge according to claim 2, characterized in that: The clean water backflow pipe (23) is arranged in the anoxic zone and away from the air inlet pipe (19), and water level observation openings (25) are formed in the outer walls of the sludge backflow pipe (21) and the clean water backflow pipe (23).

5. The AAO process sewage treatment plant for facilitating the cleaning of the settled sludge according to claim 2, characterized in that: The end of the gas conveying pipe (22) away from the air inlet pipe (19) is fixedly connected with an aeration pipe (27), the aeration pipe (27) is arranged in the aerobic zone, and a bacterial population breeding frame (26) is fixedly connected to the aerobic zone.

6. The AAO process sewage treatment plant for facilitating the cleaning of the settled sludge according to claim 1, wherein: Two drain holes (4) are formed in the bottom of the outer wall of the middle partition plate (3), and two drain holes (4) are formed in the top of the outer walls of the other two partition plates (3).

7. The AAO process sewage treatment plant for facilitating the dewatering of the sludge according to claim 1, wherein: A plurality of spray heads (18) are fixedly connected to the right inner wall of the processing box (1), the check valves (15) are fixedly connected with water pipes (16) away from the cylinder (10), one of the water pipes (16) is communicated with the spray heads (18), and the other water pipe (16) is mounted in the upper side of the sedimentation and clarification zone.

8. The AAO process sewage treatment plant for facilitating the dewatering of the sludge according to claim 2, wherein: Two detection openings (29) are formed in the top of the processing box (1), a water inlet (5) is formed in the left outer wall of the processing box (1), an ultraviolet lamp (17) is fixedly connected in the water outlet (6), and three valves (24) are fixedly connected to the outer wall of the air inlet pipe (19).

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