Rural sewage treatment device suitable for anoxic zone with suspended filler

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a rural sewage treatment device suitable for an anoxic zone with suspended filler. An anoxic tank is divided into an upper filler area and a lower mixed liquid area through a grating plate, an air power source turning plate pulse stirring device is arranged in the lower mixed liquid area, and stirring is achieved through pulse type pitching swing of a turning plate; a water pump power source stirring device is arranged in the upper packing area, and mixed liquid is extracted from the lower mixed liquid area and then sprayed out from the upper packing area to form high-speed circulation so as to achieve packing fluidization and full mixing of the mixed liquid on the upper portion and the lower portion. Through mutual cooperation of the two stirring devices, not only can good stirring and mixing effects be achieved, but also the mass transfer efficiency can be improved, and a better denitrification effect is achieved. Meanwhile, the filler is arranged in the upper filler area and is blocked by the grating plate, so that the filler cannot enter the lower mixed liquid area, the filler and the stirring equipment cannot be abraded, stable operation of the stirring equipment cannot be interfered, and a trace amount of air cannot damage the anoxic environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially suitable for rural sewage treatment device of suspended filler in anoxic zone. BACKGROUND

[0002] With the vigorous development of rural economic construction and the advancement of urbanization process, the water environment governance project in rural areas has become an important problem to be solved urgently, compared with the municipal drainage engineering of city scale, the rural sewage treatment is restricted by the wide region, the scattered villages, the operation and maintenance difficulties and other conditions. The characteristics of the great change of rural sewage quantity and quality determine that the rural sewage treatment should first select the fixed biological treatment process such as biofilm method, and the conventional activated sludge process is poor in denitrification effect due to the low water temperature in winter and the impact resistance.

[0003] According to the actual situation of land shortage of rural sewage engineering, limited management personnel level and so on, combined with the requirement of ecological environmental protection, the rural sewage treatment engineering advocates to preferentially use integrated equipment with low energy consumption, low operation cost, low capital cost, less land occupation. The integrated sewage treatment equipment has the characteristics of small pool capacity and shallow water depth, in order to improve the impact load capacity, the rural sewage treatment integrated equipment will use the biofilm method by adding filler. The suspended filler in the anoxic zone needs good stirring equipment to ensure the fluidization effect of the filler. If the traditional mechanical stirring method of municipal sewage plant is used, the filler and stirring equipment will be worn, which will affect the treatment effect. If the traditional air perforated pipe stirring method of rural sewage plant is used, the intermittent stirring of perforated pipe will cause the perforated pipe to be blocked, and then the stirring and mixing effect is poor, the filler fluidization is poor, the denitrification effect is poor, and the continuous stirring of perforated pipe will destroy the anoxic environment because of the increase of DO, which will affect the denitrification effect.

[0004] Therefore, a stirring device is needed, which can provide sufficient stirring to ensure the full fluidization of the filler and the full mixing of the mixed liquid, and will not damage the anoxic environment, and will not cause wear between the equipment and the filler due to direct contact. UTILITY MODEL CONTENT

[0005] (I) technical problem to be solved

[0006] In view of the above shortcomings and deficiencies of the prior art, the utility model provides a rural sewage treatment device suitable for suspended filler in anoxic zone, which solves the problem that the traditional stirring equipment cannot simultaneously ensure the full fluidization of the filler and cannot damage the anoxic environment, and avoids the wear between the equipment and the filler.

[0007] (II) technical scheme

[0008] In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises:

[0009] The utility model provides a kind of rural sewage treatment device suitable for suspended filler in anoxic zone, including anoxic pool, air power source flap pulse stirring device and water pump power source stirring device, anoxic pool inside is equipped with horizontal grating plate, which divides anoxic pool into upper filler area and lower mixed liquor area.MBBR suspended filler is provided in upper filler area, grating plate can intercept MBBR suspended filler in upper filler area and the hole therein can be connected upper filler area and lower mixed liquor area.

[0010] Air power source flap pulse stirring device is arranged in lower mixed liquor area, and air power source flap pulse stirring device can be through the pulse type pitch oscillation of flap, to stir mixed liquor in lower mixed liquor area;

[0011] Water pump power source stirring device is arranged in upper filler area, and water pump power source stirring device can extract mixed liquor from lower mixed liquor area, then spray from upper filler area, to form circulation between upper filler area and lower mixed liquor area.

[0012] Optionally, air power source flap pulse stirring device includes flap, first fixing device and second fixing device, first fixing device and second fixing device are oppositely arranged at the bottom of anoxic pool.Flap is the shape of inverted buckle with cavity, which is enclosed by top plate and four peripheral side walls, any one of the side walls is movable end, and the side wall opposite to movable end is fixed end, and the cavity enclosed is gas collection area.First fixing device is located below movable end, and second fixing device is located below fixed end, and fixed end is rotatably connected with second fixing device.

[0013] Flap is below gas distribution pipe, which is in communication with gas collection area, and gas distribution pipe can select gas supply for gas collection area.When a certain amount of gas is accumulated in gas collection area, flap is rotated upward relative to second fixing device, movable end is separated from first fixing device, and an angle is formed between flap and second fixing device, at this time, flap is in open state, and accumulated gas overflow from the angle place;When the gas in gas collection area reduces to a certain amount, flap is rotated downward relative to second fixing device, movable end falls downward to first fixing device, at this time, flap is in closed state.

[0014] Air power source flap pulse stirring device can be arranged circumferentially in one group or multiple groups in lower mixed liquor area.

[0015] Optionally, movable end is inclined surface that inclines upward to fixed end direction, and counterweight is arranged above the inclined surface.Fixed end is rotatably connected with second fixing device through hinge.When flap is in open state, the angle formed between flap and second fixing device is between 20-30 degrees.

[0016] Optionally, the air distribution pipe is connected to an air main pipe connected to the electromagnetic air pump through an air branch pipe, and an air regulating valve is arranged on the air branch pipe.

[0017] Optionally, the turning plate is arranged at a position 250-350 mm away from the bottom of the anoxic tank.

[0018] Optionally, the water pump power source stirring device comprises a water inlet pipe assembly, a water outlet pipe assembly and a pipeline water pump, the water inlet pipe assembly is fixedly connected to the inlet of the pipeline water pump, and the water outlet pipe assembly is fixedly connected to the outlet of the pipeline water pump.

[0019] The upper end of the water inlet pipe assembly is fixedly connected to the inlet of the pipeline water pump, and the lower end of the water inlet pipe assembly penetrates through the grid plate and extends into the lower mixed liquid area; the water outlet pipe assembly comprises a vertical pipe and a horizontal pipe in the shape of an I-beam, the lower end of the vertical pipe is fixedly connected to the outlet of the pipeline water pump, the upper end of the vertical pipe is fixedly connected to the horizontal pipe, the vertical pipe and the horizontal pipe are in internal communication, and a plurality of nozzles are arranged on the parallel beams on the two sides of the horizontal pipe in the opposite directions.

[0020] Optionally, the anoxic tank has a square structure, the parallel beams on the two sides of the horizontal pipe are arranged at an angle of 30-45 degrees with the side wall of the anoxic tank, the plurality of nozzles are arranged in parallel with the bottom of the anoxic tank or are arranged to be inclined toward the bottom of the anoxic tank and at an angle of 30-40 degrees with the bottom, and the water outlet pipe assembly is arranged at a position 150-250 mm below the normal operation liquid level of the anoxic tank.

[0021] Optionally, a circular hole is formed in the center of the grid plate, a flange is embedded and installed in the circular hole, the flange is fixedly connected to a sleeve at one end facing the lower mixed liquid area, and the end of the water inlet pipe assembly away from the pipeline water pump penetrates into the lower mixed liquid area from the inside of the flange and the sleeve.

[0022] Optionally, a beam is fixedly arranged on the upper part of the anoxic tank, a connecting rod is arranged on the end surface of the pipeline water pump away from the bottom of the anoxic tank, and the connecting rod is fixed to the beam through a pulling rope.

[0023] Optionally, the grid plate is arranged at a position 550-650 mm away from the bottom of the anoxic tank, the thickness of the grid plate is 25-45 mm, the holes in the grid plate are square holes with a size of 12 mm*12 mm, and the material of the grid plate is glass fiber reinforced plastic or stainless steel.

[0024] (Three) beneficial effects

[0025] The beneficial effects of the utility model are:

[0026] This invention relates to a rural sewage treatment device with suspended packing material suitable for anoxic zones. It replaces existing perforated pipe aeration and mechanical stirring methods for rural sewage treatment. A grid plate divides the anoxic tank into an upper packing zone and a lower mixed liquid zone. An air-powered flapping pulse stirring device is installed in the lower mixed liquid zone. The pulsed pitching and oscillating of the flaps stirs the mixed liquid in the lower zone. The release of a small amount of air also flushes the grid plate holes, preventing clogging. Simultaneously, it disturbs the upper packing material and the mixed liquid, enhancing the mixing effect. Because the air volume is very small, it does not disrupt the anoxic environment. A water pump-powered stirring device is installed in the upper packing zone. This device draws the mixed liquid from the lower zone and sprays it out at high speed from the upper zone, creating a circulation in the upper packing zone. This ensures sufficient fluidization of the packing material and facilitates the exchange of the mixed liquid between the upper and lower zones, resulting in good mass transfer. By combining the two stirring devices, not only can excellent stirring and mixing effects be achieved, but mass transfer efficiency can also be improved, resulting in better denitrification. Furthermore, trace amounts of air will not disrupt the oxygen-deficient environment. Simultaneously, the packing material is positioned in the upper packing zone, where it is blocked by the grid plate, preventing it from entering the lower mixing zone. This avoids contact with the inlet of the pneumatically powered flapping pulse stirring device and the water pump-powered stirring device, preventing wear between the packing material and the stirring equipment and ensuring stable operation. This extends the service life of both the packing material and the equipment. Moreover, this stirring device is inexpensive and easy to maintain. Attached Figure Description

[0027] Figure 1 This is a front view (with the flap closed) of Embodiment 1 of the present invention, which is a rural sewage treatment device with suspended packing material suitable for oxygen-deficient areas.

[0028] Figure 2 for Figure 1 A left view (with flap open) of Embodiment 1 of a rural sewage treatment device with suspended packing material suitable for anoxic areas;

[0029] Figure 3 for Figure 1 A three-dimensional schematic diagram of an embodiment 1 of a rural sewage treatment device with suspended packing material suitable for anoxic areas;

[0030] Figure 4 for Figure 1 A schematic diagram of the closed state of the flap of the air-powered flap pulse stirring device;

[0031] Figure 5 for Figure 4 A schematic diagram of the flapper pulse stirring device with air power source in the open state;

[0032] Figure 6 for Figure 4Schematic view of the middle turning plate;

[0033] Figure 7 For Figure 1 Schematic view of the water pump power source stirring device;

[0034] Figure 8 For the embodiment 2 air power source turning plate pulse stirring device arrangement position of the rural sewage treatment device suitable for the anoxic zone with suspended filler of the utility model is shown in the top view.

[0035] [Legend of the drawing]

[0036] 1: anoxic tank;

[0037] 2: air power source turning plate pulse stirring device; 21: turning plate; 211: movable end; 212: fixed end;

[0038] 213: gas collection area; 214: counterweight; 215: folding page; 22: first fixing device; 23: second fixing device;

[0039] 3: water pump power source stirring device; 31: water inlet pipe assembly; 32: water outlet pipe assembly; 321: vertical pipe; 322: horizontal pipe; 3221: nozzle; 33: pipeline water pump;

[0040] 4: grating plate; 41: flange; 42: sleeve;

[0041] 5: upper filler area;

[0042] 6: lower mixed liquid area;

[0043] 7: MBBR suspended filler;

[0044] 8: air distribution pipe;

[0045] 9: air branch pipe; 91: air regulating valve;

[0046] 10: electromagnetic air pump;

[0047] 11: air main pipe;

[0048] 12: crossbeam;

[0049] 13: traction rope;

[0050] 14: normal operation liquid level; 15: gas. DETAILED DESCRIPTION

[0051] In order to better explain the utility model, so as to facilitate understanding, the following will be combined with the drawings, through specific embodiments, the utility model is described in detail. Among them, the "up", "down", "left", "right" and other orientation terms mentioned in this paper are with the orientation of the figure as the reference. Figure 1 ​

[0052] The utility model discloses an applicable to the rural sewage treatment device of suspended filler in anoxic area, the anoxic pool is divided into upper filler area and lower mixed liquid area through grating plate. The air power source turnover plate pulse stirring device is arranged in the lower mixed liquid area, and it is through the pulse type pitch oscillation of turnover plate to the mixed liquid in the lower mixed liquid area, and after the trace air release, still can wash the hole of grating plate, avoids the blockage, and still can disturb the upper filler and mixed liquid in the washing, and strengthens the mixing effect, because the air amount is very small, therefore will not destroy the anoxic environment, the water pump power source stirring device is arranged in the upper filler area, and it is through the mixed liquid extraction from the lower mixed liquid area, and then high -speed spouts from the upper filler area to form the circulation in the upper filler area, can guarantee that the filler is fully fluidized, and realizes the exchange of mixed liquid between the upper filler area and the lower mixed liquid area, and the mass transfer effect is good. Through the cooperation of two kinds of stirring devices, not only can realize good stirring and mixing effect, but also can improve the mass transfer efficiency, realizes better denitrification effect, and trace air will not destroy the anoxic environment. Meanwhile, the filler is arranged in the upper filler area, and the filler cannot enter the lower mixed liquid area under the block of grating plate, and will not contact the water inlet of air power source turnover plate pulse stirring device and water pump power source stirring device, will not cause the wear and tear between filler and stirring equipment and the stable operation of interference stirring equipment, prolongs the service life of filler and equipment, and the stirring device cost is low, and the operation and maintenance are convenient.

[0053] In order to better understand the above technical solutions, the exemplary embodiments of the utility model will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the utility model and to convey the complete scope of the utility model to those skilled in the art.

[0054] Example 1:

[0055] Reference Figures 1 to 3The embodiment provides a rural sewage treatment device suitable for a suspended filler in an anoxic zone, which comprises an anoxic tank 1, an air power source flipper pulse stirring device 2 and a water pump power source stirring device 3. The anoxic tank 1 is internally provided with a transverse grid plate 4, which divides the anoxic tank 1 into an upper filler area 5 and a lower mixed liquid area 6. The MBBR suspended filler 7 is arranged in the upper filler area 5, the grid plate 4 can intercept the MBBR suspended filler 7 in the upper filler area 5, and the holes in the grid plate 4 can communicate the liquid in the upper filler area 5 and the lower mixed liquid area 6. In the embodiment, the MBBR suspended filler 7 preferably has a diameter of 25 mm and a thickness of 10 mm; the grid plate 4 preferably has a thickness of 25-45 mm and square holes with a size of 12 mm*12 mm on the grid, and is made of glass fiber reinforced plastic or stainless steel. Of course, the specifications of the MBBR suspended filler 7 and the grid plate 4 can be selected according to actual needs by those skilled in the art, such as circular holes or long strip-shaped holes on the grid, as long as the MBBR suspended filler 7 can be intercepted and cannot enter the lower mixed liquid area 6. The material selection of the grid plate 4 is not limited by the embodiment, but the corrosion resistance of the selected material needs to be considered or the necessary corrosion treatment needs to be performed, and the grid plate 4 is arranged at a position 550-650 mm away from the bottom of the anoxic tank 1 in the embodiment.

[0056] The air power source flipper pulse stirring device 2 is arranged in the lower mixed liquid area 6, which can periodically release the gas 15 by means of gas collection-release-re-collection in the gas collection area 213, so that the flipper 21 can be pulsed to pitch and swing, thereby stirring the mixed liquid in the lower mixed liquid area 6. After a small amount of air is released, the holes on the grid plate 4 can be flushed to avoid blockage, and the MBBR suspended filler 7 and the mixed liquid in the upper filler area 5 can be disturbed to strengthen the mixing effect. Since the amount of air is very small, the anoxic environment will not be destroyed. Specifically, the air power source flipper pulse stirring device 2 comprises a flipper 21, a first fixing device 22 and a second fixing device 23. Figure 6As shown, the flap 21 is an inverted shape with a cavity, formed by a top plate and surrounding side walls. One side wall is selected as the movable end 211, and the side wall opposite the movable end 211 is the fixed end 212. The enclosed cavity is the air collection area 213. The first fixing device 22 is located below the movable end 211, and the second fixing device 23 is located below the fixed end 212. The fixed end 212 and the second fixing device 23 are rotatably connected. In this embodiment, the flap 21 is made of stainless steel, and preferably, a stainless steel hinge 215 is used to connect the fixed end 212 and the second fixing device 23. That is, one end of the hinge 215 is fixedly connected to the fixed end 212, and the other end is fixedly connected to the second fixing device 23. The fixing connection can be achieved by bolt connection or adhesive bonding. Of course, those skilled in the art can also use other connection methods to achieve the rotatable connection between the fixed end 212 and the second fixing device 23, such as hinges, gears, etc. The materials of the flap 21 and the hinge 215 can also be selected according to actual needs.

[0057] Below the flap 21, there is an air distribution pipe 8 that communicates with the air collection area 213. The air distribution pipe 8 can selectively supply air to the air collection area 213. The air distribution pipe 8 is connected to the main air pipe 11, which is connected to the electromagnetic air pump 10, through an air branch pipe 9. To facilitate the adjustment of the air supply, an air regulating valve 91 is also provided on the air branch pipe 9. The air regulating valve 91 can adjust the amount of air in the air collection area 213 on each flap 1. In this way, only a small amount of air is needed to stir the mixture in the lower mixing liquid area 6.

[0058] like Figure 5 As shown, when a certain amount of gas 15 accumulates in the gas collection area 213, based on Archimedes' principle (that is, an object immersed in a fluid experiences an upward buoyant force, which is equal to the weight of the fluid displaced by the object), the gas 15 in the gas collection area 213 will displace some water, causing the overall volume of liquid displaced by the flap 21 (including the collected gas) to increase. Consequently, the buoyancy of the flap 21 begins to increase. When the buoyancy of the flap 21 is greater than its own weight, the flap 21 rotates upward relative to the second fixed device 23, and the movable end 211 separates from the first fixed device 22. An angle is formed between the flap 21 and the second fixed device 23. At this time, the flap 21 is in an open state, and the accumulated gas 15 overflows from the angle. In this embodiment, the angle formed between the flap 21 and the second fixed device 23 is between 20 and 30 degrees. Figure 4As shown, when the gas 15 in the gas collection area 213 is reduced to a certain amount, based on the Archimedes principle, the volume of the flap 21 that loses the gas 15 is smaller than that of the liquid pushed away before the gas 15 is contained, and then the buoyancy of the flap 21 starts to decrease. When the buoyancy of the flap 21 is less than its own gravity, the flap 21 rotates downward relative to the second fixing device 23, and the movable end 211 falls downward to the first fixing device 22, at this time, the flap 21 is in a closed state, and starts to collect gas again. The periodic release of the gas 15 by the flap 21 forms a pulse, and the pulse releases the kinetic energy of air and the potential energy of the flap gravity at a moment, forming water flow disturbance. Based on the above structure and movement principle of the air power source flap pulse stirring device 2, those skilled in the art can design the specific parameters of the gas collection area 213, such as the required gas collection amount and gas collection time, according to the actual size of the anoxic tank, the water storage capacity, the processing degree requirement, and the specific material and size of the flap 21.

[0059] At the same time, the air power source flap pulse stirring device 2 of the embodiment is preferably suitable for the treatment of rural sewage, because the depth of the anoxic tank of rural sewage is small, and the water storage depth is generally less than 3 meters, and the water pressure at the bottom of the tank is relatively small. However, the sewage tank of some large municipal water plants is generally deep, and the water storage depth can reach more than 5 meters. At this time, the water pressure on the flap 21 at the bottom of the tank is very large, and a very large buoyancy is required to open the flap 21, that is, the size of the flap 21 needs to be designed to be large enough, and the gas collection amount also needs to be very large to meet the requirements. Therefore, the air power source flap pulse stirring device 2 shown in the embodiment is not suitable for use in the sewage tank of a deep municipal water plant.

[0060] In order to facilitate the flap 21 to fall back better, the movable end 211 is inclined upward to the fixed end 212, and a counterweight 214 is arranged above the inclined surface. The air power source flap pulse stirring device 2 can be arranged circumferentially in one or more groups in the lower mixed liquid area 6. In the embodiment, the flap 21 is preferably arranged at a position 250-350 mm from the bottom of the anoxic tank 1, and as shown, two groups are arranged at 180 degrees. Figure 1 Those skilled in the art can adjust the arrangement position and number of the air power source flap pulse stirring device 2 according to the actual size of the anoxic tank 1 and different requirements for stirring intensity.

[0061] The water pump power source stirring device 3 is arranged in the upper filler area 5, which can extract the mixed liquid from the lower mixed liquid area 6 and then spray it at high speed from the upper filler area 5, so as to form a circulating flow in the upper filler area 5, which can ensure that the filler is fully fluidized, and realize the exchange of mixed liquid between the upper filler area 5 and the lower mixed liquid area 6, and the mass transfer effect is good. Specifically, as shown in Figure 7As shown, the water pump power source stirring device 3 comprises a water inlet pipe assembly 31, a water outlet pipe assembly 32 and a pipeline water pump 33. The water inlet pipe assembly 31 is fixedly connected with the inlet of the pipeline water pump 33, and the water outlet pipe assembly 32 is fixedly connected with the outlet of the pipeline water pump 33, so that the water inlet pipe assembly 31, the water outlet pipe assembly 32 and the pipeline water pump 33 form an integral whole, wherein the water inlet pipe assembly 31 and the pipeline water pump 33 inlet are preferably connected by bonding, and the water outlet pipe assembly 32 and the pipeline water pump 33 outlet are preferably connected by screwing. Of course, the utility model is not limited to this, and any connection form can be selected according to actual needs by those skilled in the art. Further, the upper end of the water inlet pipe assembly 31 is fixedly connected with the inlet of the pipeline water pump 33, and the lower end of the water inlet pipe assembly 31 penetrates through the grid plate 4 and extends into the lower mixed liquid area 6; the water outlet pipe assembly 32 comprises a vertical pipe 321 and a horizontal pipe 322 in the shape of an I-beam, the lower end of the vertical pipe 321 is fixedly connected with the outlet of the pipeline water pump 33, the upper end of the vertical pipe is fixedly connected with the horizontal pipe 322, and the vertical pipe 321 and the horizontal pipe 322 are in internal communication. Meanwhile, the horizontal beams on both sides of the horizontal pipe 322 are provided with a plurality of groups of nozzles 3221 in the opposite directions. In the embodiment, the water outlet pipe assembly 32 is preferably arranged at a position 150mm-250mm below the normal operation liquid level surface 14 of the anoxic tank 1, and the number of the nozzles 3221 on both sides of the horizontal pipe 322 is arranged as 4 groups in uniform distribution.

[0062] After starting the pipeline water pump 33, the water pump power source stirring device 3 extracts the mixed liquid from the lower mixed liquid area 6 through the water inlet at the lower part of the water inlet pipe assembly 31, and the mixed liquid is sprayed at high speed from the nozzles 3221 on the water outlet pipe assembly 32 in the upper packing area 5 after being lifted by the pipeline water pump 33, so as to form a circulating flow in the upper packing area 5, which can ensure that the packing is fully fluidized and realize the exchange of the mixed liquid between the upper packing area 5 and the lower mixed liquid area 6, and the mass transfer effect is good. In order to make it easier to form a circulating flow in the upper packing area 5, the anoxic tank 1 is designed in a square structure in the embodiment, and the horizontal beams on both sides of the horizontal pipe 322 are arranged at an angle of 30-45 degrees with the side wall of the anoxic tank 1. When the nozzles 3221 spray the mixed liquid, the mixed liquid is inclined to impact on the side wall of the anoxic tank 1, which is easy to produce vortex phenomenon in the local part, and thus can promote the formation of a circulating flow in the upper packing area 5. Among them, a plurality of groups of nozzles 3221 can be arranged in parallel with the bottom of the anoxic tank 1, or can be inclined to the bottom of the anoxic tank 1, and when inclined, the angle with the bottom is preferably 30-40 degrees.

[0063] In order to fix the water pump power source stirring device 3, and facilitate its maintenance, a cross beam 12 is fixed on the upper part of the anoxic tank 1. A connecting rod 331 is arranged on the end surface of the pipeline water pump 33 away from the bottom of the anoxic tank 1. The connecting rod 331 is fixed on the cross beam 12 through the traction rope 13, so that the water pump power source stirring device 3 can be more stable and not easy to shake. When it needs to be maintained, the traction rope 13 is released from the cross beam 12. Without stopping water, the water pump power source stirring device 3 can be taken out from the anoxic tank 1 as a whole, which is convenient and fast. In order to make the lower part of the water pump power source stirring device 3 stand more stably in the anoxic tank 1, a circular hole is arranged at the center position of the grid plate 4. A flange 41 is embedded in the circular hole. The flange 41 is fixedly connected with a sleeve pipe 42 at one end of the lower mixed liquid area 6. The water inlet pipe assembly 31 is inserted into the lower mixed liquid area 6 from the inside of the flange 41 and the sleeve pipe 42. The arrangement of the flange 41 and the sleeve pipe 42 not only sets a limit for the lower part of the water pump power source stirring device 3, but also ensures that the position of the water inlet pipe assembly 31 passing through the grid plate 4 has a certain sealing property, so that the MBBR suspended filler 7 cannot enter the lower mixed liquid area 6. In this embodiment, the pipe diameter of the flange 41 and the sleeve pipe 42 is DN90, the length of the sleeve pipe 42 is 0.45m, the pipe diameter of the water inlet pipe assembly 31 is DN75, and the length is 0.5m. The material of the flange 41 is preferably plastic. The pipe materials of the sleeve pipe 42, the water inlet pipe assembly 31 and the water outlet pipe assembly 32 are preferably UPVC (Unplasticized Polyvinyl Chloride). Of course, it is not limited to this. Those skilled in the art can select the material and pipe diameter according to the actual needs.

[0064] In summary, the air power source paddle pulse stirring device 2 forms a circular flow in the lower mixed liquid zone 6, and the water pump power source stirring device 3 forms a horizontal and vertical circular flow in the upper filler zone 5. The micro gas release of the air power source paddle pulse stirring device 2 can also disturb the MBBR suspended filler 7 and the mixed liquid in the upper filler zone 5, avoid the MBBR suspended filler 7 from sinking to the bottom and accumulating, and also flush the sediment on the grid plate 4 to avoid the grid hole from being blocked. The water pump power source stirring device 3 can suck the mixed liquid at the bottom of the anoxic tank 1 into the upper filler zone 5 and then spray it out at high speed, which accelerates the exchange of the mixed liquid between the upper filler zone 5 and the lower mixed liquid zone 6, and also avoids the sludge accumulation in the lower mixed liquid zone 6 from affecting the work of the paddle 21. The two kinds of stirring devices cooperate with each other, which can not only ensure the mixing effect of the mixed liquid in the anoxic tank 1, but also effectively avoid the MBBR suspended filler 7 from entering the lower mixed liquid zone 6 and contacting the air power source paddle pulse stirring device 2, which can avoid the mutual abrasion and also avoid the MBBR suspended filler 7 from blocking the suction inlet of the water pump power source stirring device 3, or even being sucked into the pipeline water pump 33 to cause the pipeline water pump 33 to be abnormal and affect the stable operation of the equipment. At the same time, when the paddle 21 is opened, the actual released gas amount is small and the work state is intermittent, so it will not destroy the anoxic environment in the anoxic tank 1 and will not affect the denitrification effect, which can ensure the stable operation of the process and the sewage treatment effect, and the whole stirring device has low cost and is convenient to operate and maintain.

[0065] The use process of the embodiment 1 is briefly described as follows:

[0066] The electromagnetic air pump 10 is opened, and then the air regulating valve 91 is opened and adjusted to an appropriate size. At this time, the gas collection zone 213 in the paddle 21 starts to collect gas, and as the gas collection amount increases, the buoyancy of the paddle 21 gradually increases until the paddle 21 is opened. At this time, the accumulated gas 15 overflows. As the gas 15 overflows, the paddle 21 starts to gradually fall to the closed state under the influence of gravity, that is, a cycle of opening and closing is completed. Next, the gas collection in the gas collection zone 213 starts again. Through the periodic opening and closing of the paddle 21 and the release of the gas 15, the stirring is completed. At the same time, the pipeline water pump 33 is started, and the water pump power source stirring device 3 sucks the mixed liquid from the lower mixed liquid zone 6, sprays it out from the upper filler zone 5 after lifting, and thus forms a circular flow.

[0067] When the water pump power source stirring device 3 is abnormal or needs to be repaired, the traction rope 13 is lifted from the cross beam 12 without stopping the water, and then the water pump power source stirring device 3 can be pulled out from the anoxic tank 1 to the water surface for repair or replacement.

[0068] Embodiment 2:

[0069] Reference Figure 8In order to make the air power source flap pulse stirring device 2 achieve better stirring effect in the lower mixed liquid area 6, the first fixing device 22 and the second fixing device 23 are designed as square ring structures and are placed in the central position of the bottom of the anoxic tank 1, that is, the first fixing device 22 and the second fixing device 23 are concentrically arranged, wherein the annular size of the first fixing device 22 is larger than the annular size of the second fixing device 23, and the distance between the two is just enough to install the flap 21.

[0070] Four groups of flaps 21 are arranged circumferentially around the center of the bottom of the anoxic tank 1 between the first fixing device 22 and the second fixing device 23, and the fixed ends 212 of the four groups of flaps 21 are rotatably connected to the four edges of the second fixing device 23 by using the folding pages 215, and the movable ends 211 of the four groups of flaps 21 fall on the four edges of the first fixing device 22. The design of the remaining parts except the flap 21, the first fixing device 22 and the second fixing device 23 is the same as that of the first embodiment, which will not be described here.

[0071] In the description of the present application, it should be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0072] In the present application, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "above" and "above" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0074] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0075] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A rural sewage treatment device with suspended filler in anoxic zone, characterized in that: it comprises an anoxic tank (1), an air power source flip plate pulse stirring device (2) and a water pump power source stirring device (3), the anoxic tank (1) is internally provided with a transverse grid plate (4), the grid plate (4) divides the anoxic tank (1) into an upper filler area (5) and a lower mixed liquid area (6), an MBBR suspended filler (7) is arranged in the upper filler area (5), the grid plate (4) can intercept the MBBR suspended filler (7) in the upper filler area (5) and the holes therein can communicate the upper filler area (5) and the lower mixed liquid area (6); the air power source flip plate pulse stirring device (2) is arranged in the lower mixed liquid area (6) and can stir the mixed liquid in the lower mixed liquid area (6) through the pulse pitching swing of a flip plate (21); the water pump power source stirring device (3) is arranged in the upper filler area (5) and can extract mixed liquid from the lower mixed liquid area (6) and then spray it out from the upper filler area (5), so as to form a circulation between the upper filler area (5) and the lower mixed liquid area (6).

2. The rural sewage treatment device with suspended filler in anoxic zone according to claim 1, characterized in that: the air power source flip plate pulse stirring device (2) comprises the flip plate (21), a first fixing device (22) and a second fixing device (23), the first fixing device (22) and the second fixing device (23) are oppositely arranged at the bottom of the anoxic tank (1); the flip plate (21) is a reverse-downdrooping shape with a cavity enclosed by a top plate and four side walls, any one of the side walls is selected as a movable end (211) and the side wall opposite to the movable end (211) is a fixed end (212), the cavity enclosed by the movable end (211) and the fixed end (212) is a gas collection area (213); the first fixing device (22) is located below the movable end (211), the second fixing device (23) is located below the fixed end (212), and the fixed end (212) and the second fixing device (23) are rotatably connected; a gas distribution pipe (8) in communication with the gas collection area (213) is arranged below the flip plate (21), the gas distribution pipe (8) can selectively supply gas to the gas collection area (213); when a certain amount of gas (15) is accumulated in the gas collection area (213), the flip plate (21) rotates upward relative to the second fixing device (23), the movable end (211) is separated from the first fixing device (22), an included angle is formed between the flip plate (21) and the second fixing device (23), at this time, the flip plate (21) is in an open state, and the accumulated gas (15) overflows from the included angle. ​ ​ ​ ​ ​ ​ ​ ​ When the gas (15) in the gas collection area (213) is reduced to a certain amount, the flap (21) rotates downward relative to the second fixed device (23), and the movable end (211) falls downward to the first fixed device (22), at which time the flap (21) is in a closed state; The air power source flap pulse stirring device (2) can be arranged circumferentially in one or more groups in the lower mixed liquid area (6).

3. The rural sewage treatment device according to claim 2, wherein: The movable end (211) is a slope inclined upward to the fixed end (212), and a counterweight (214) is arranged above the slope; The fixed end (212) and the second fixed device (23) are rotatably connected through a hinge (215); When the flap (21) is in an open state, the included angle between the flap (21) and the second fixed device (23) is between 20-30 degrees.

4. The rural sewage treatment device according to claim 2, wherein: The air distribution pipe (8) is connected to the air main pipe (11) connected to the electromagnetic air pump (10) through the air branch pipe (9), and the air branch pipe (9) is provided with an air regulating valve (91).

5. The rural sewage treatment device according to claim 2, wherein: The flap (21) is arranged at a position 250mm-350mm away from the bottom of the anoxic tank (1).

6. The rural sewage treatment device according to any one of claims 1-5, wherein: The water pump power source stirring device (3) comprises a water inlet pipe assembly (31), a water outlet pipe assembly (32), and a pipeline water pump (33); The water inlet pipe assembly (31) is fixedly connected to the inlet of the pipeline water pump (33), and the water outlet pipe assembly (32) is fixedly connected to the outlet of the pipeline water pump (33); The upper end of the water inlet pipe assembly (31) is fixedly connected to the inlet of the pipeline water pump (33), and the lower end of the water inlet pipe assembly (31) penetrates through the grid plate (4) and extends into the lower mixed liquid area (6); The water outlet pipe assembly (32) comprises a vertical pipe (321) and a horizontal pipe (322) in an I-shaped structure, the lower end of the vertical pipe (321) is fixedly connected to the outlet of the pipeline water pump (33), the upper end of the vertical pipe is fixedly connected to the horizontal pipe (322), and the vertical pipe (321) and the horizontal pipe (322) are in internal communication; The parallel beams on both sides of the horizontal pipe (322) are provided with multiple groups of nozzles (3221) in opposite directions.

7. The rural sewage treatment device according to claim 6, wherein: The anoxic tank (1) is in a square structure, and the parallel beams on both sides of the horizontal pipe (322) are arranged at an included angle of 30-45 degrees with the side wall of the anoxic tank (1). The plurality of groups of the nozzles (3221) are arranged parallel to the bottom of the anoxic tank (1) or are arranged inclined towards the bottom of the anoxic tank (1) and form an angle of 30-40 degrees with the bottom. The water outlet pipe assembly (32) is arranged at a position 150-250 mm below the normal operation liquid level (14) of the anoxic tank (1).

8. The rural sewage treatment device with suspended filler in the anoxic zone according to claim 6, characterized in that: A circular hole is formed in the center of the grid plate (4), and a flange (41) is embedded and installed in the circular hole; the flange (41) is fixedly connected with a sleeve (42) at one end thereof facing the lower mixed liquid zone (6); and the water inlet pipe assembly (31) is inserted into the lower mixed liquid zone (6) from the inside of the flange (41) and the sleeve (42) at an end thereof away from the pipeline water pump (33).

9. The rural sewage treatment device with suspended filler in the anoxic zone according to claim 6, characterized in that: A cross beam (12) is fixedly arranged at the upper part of the anoxic tank (1); a connecting rod (331) is arranged on the end surface of the pipeline water pump (33) away from the bottom of the anoxic tank (1); and the connecting rod (331) is fixed to the cross beam (12) through a traction rope (13).

10. The rural sewage treatment device with suspended filler in the anoxic zone according to claim 6, characterized in that: The grid plate (4) is arranged at a position 550-650 mm away from the bottom of the anoxic tank (1), and the thickness of the grid plate (4) is 25-45 mm; the holes in the grid plate (4) are square holes with a size of 12 mm x 12 mm; The material of the grid plate (4) is glass fiber reinforced plastic or stainless steel.

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