Rural sewage treatment device suitable for anoxic zone with suspended filler

Abstract

The invention relates to the technical field of sewage treatment, in particular to a rural sewage treatment device suitable for an anoxic zone and provided 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 invention relates to the technical field of sewage treatment, in particular to a rural sewage treatment device with suspended fillers suitable for anoxic areas. Background Art

[0002] With the vigorous development of rural economic construction and the advancement of urbanization, water environment governance projects in rural areas have become an important issue that needs to be solved urgently. Compared with urban-scale municipal drainage projects, rural sewage treatment is restricted by conditions such as wide areas, scattered villages, and difficult operation and maintenance. The characteristics of large changes in the quantity and quality of agricultural sewage determine that rural sewage treatment should first choose fixed biological treatment processes such as biofilm method. Conventional activated sludge process has poor denitrification effect due to low water temperature in winter and shock resistance.

[0003] In view of the actual situation of tight land use and limited management personnel in rural sewage projects, and in combination with the requirements of ecological and environmental protection, rural sewage treatment projects advocate the priority use of integrated equipment with low energy consumption, low transportation insurance, low infrastructure costs, and less land occupation. Integrated sewage treatment equipment has the characteristics of small pool capacity and shallow water depth. In order to improve the ability to resist shock loads, rural sewage treatment integrated equipment will adopt the biofilm method of adding fillers. If suspended fillers are added to the anoxic zone, good mixing equipment is required to ensure the fluidization effect of the fillers. If the traditional mechanical mixing method of the municipal sewage plant is used, it will cause wear of the fillers and mixing equipment, affecting the treatment effect. If the traditional air perforated pipe mixing method of the village sewage plant is used, the intermittent mixing of the perforated pipe will cause the perforated pipe to be blocked, resulting in poor mixing effect, poor fluidization of the fillers, and poor denitrification effect. The continuous mixing of the perforated pipe will destroy the anoxic environment due to the increase in DO, affecting the denitrification effect.

[0004] Therefore, a stirring device is needed that can provide sufficient stirring to ensure sufficient fluidization of the filler and sufficient mixing of the mixed liquid without destroying the oxygen-deficient environment and without causing wear between the equipment and the filler due to direct contact. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a rural sewage treatment device suitable for anoxic areas with suspended fillers, which solves the problem that traditional stirring equipment cannot simultaneously meet the requirements of ensuring sufficient fluidization of the filler, not destroying the anoxic environment, and avoiding wear between the equipment and the filler.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] The present invention provides a rural sewage treatment device suitable for anoxic areas with suspended fillers, comprising anoxic tanks, air power source flap pulse stirring devices and water pump power source stirring devices, wherein a horizontal grid plate is provided inside the anoxic tank, and the grid plate divides the anoxic tank into an upper filler area and a lower mixed liquid area. An MBBR suspended filler is provided in the upper filler area, and the grid plate can intercept the MBBR suspended filler in the upper filler area, and the holes therein can connect the upper filler area and the lower mixed liquid area.

[0010] The air power source flap pulse stirring device is arranged in the lower mixed liquid area, and the air power source flap pulse stirring device can stir the mixed liquid in the lower mixed liquid area through the pulse pitch swing of the flap;

[0011] The water pump power source stirring device is arranged in the upper filling area, and the water pump power source stirring device can extract the mixed liquid from the lower mixed liquid area and then spray it out from the upper filling area, thereby forming a circulation between the upper filling area and the lower mixed liquid area.

[0012] Optionally, the air power source flap pulse stirring device includes a flap, a first fixing device and a second fixing device, and the first fixing device and the second fixing device are arranged opposite to each other at the bottom of the anoxic tank. The flap is an inverted shape with a cavity formed by the top plate and the surrounding side walls. Any one of the side walls is selected as the movable end, and the side wall opposite to the movable end is the fixed end, and the enclosed cavity is the gas collection area. The first fixing device is located below the movable end, and the second fixing device is located below the fixed end, and the fixed end and the second fixing device are rotatably connected.

[0013] A gas distribution pipe connected to the gas collection area is arranged below the flap, and the gas distribution pipe can selectively supply gas to the gas collection area. When a certain amount of gas accumulates in the gas collection area, the flap rotates upward relative to the second fixing device, the movable end separates from the first fixing device, and an angle is formed between the flap and the second fixing device. At this time, the flap is in an open state, and the accumulated gas overflows from the angle; when the gas in the gas collection area is reduced to a certain amount, the flap rotates downward relative to the second fixing device, and the movable end falls downward back to the first fixing device, and the flap is in a closed state.

[0014] The air power source flap pulse stirring device can be arranged in one or more groups in the circumferential direction in the lower mixed liquid area.

[0015] Optionally, the movable end is an inclined plane tilted upward toward the fixed end, and a counterweight is provided above the inclined plane. The fixed end is rotatably connected to the second fixing device via a hinge. When the flap is in an open state, the angle formed between the flap and the second fixing device is between 20 and 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 provided on the air branch pipe.

[0017] Optionally, the flap is arranged at a position 250 mm to 350 mm from the bottom of the anoxic pool.

[0018] Optionally, the water pump power source stirring device includes an inlet pipe assembly, an outlet pipe assembly and a pipeline water pump, the inlet pipe assembly is fixedly connected to the inlet of the pipeline water pump, and the 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 passes through the grille plate and extends into the lower mixed liquid area; the water outlet pipe assembly includes a vertical pipe and an I-shaped horizontal pipe, 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, and the vertical pipe and the horizontal pipe are internally connected, and the parallel beams on both sides of the horizontal pipe are provided with multiple groups of nozzles in opposite directions.

[0020] Optionally, the anoxic tank is a square structure, the parallel beams on both sides of the transverse pipe are arranged at an angle of 30-45 degrees to the side wall of the anoxic tank, the multiple groups of nozzles are arranged parallel to the bottom of the anoxic tank, or are arranged obliquely toward the bottom of the anoxic tank and at an angle of 30-40 degrees to the bottom of the tank. The outlet pipe assembly is arranged at a position 150mm-250mm below the normal operating liquid level of the anoxic tank.

[0021] Optionally, a circular hole is opened at the center of the grid plate, and a mounting flange is embedded 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 is inserted into the lower mixed liquid area from the flange and the sleeve.

[0022] Optionally, a crossbeam is fixed on the upper part of the anoxic pool, and a connecting rod is provided on the end surface of the pipeline water pump away from the bottom of the anoxic pool, and the connecting rod is fixed to the crossbeam through a traction rope.

[0023] Optionally, the grating plate is arranged at a distance of 550mm-650mm from the bottom of the anoxic pool, and the thickness of the grating plate is 25mm-45mm. The holes on the grating plate are square holes of 12mm×12mm, and the material of the grating plate is fiberglass or stainless steel.

[0024] (III) Beneficial effects

[0025] The beneficial effects of the present invention are:

[0026] The present invention is a rural sewage treatment device suitable for anoxic areas with suspended fillers, which replaces the existing perforated pipe aeration stirring method and mechanical stirring method of rural sewage, and divides the anoxic tank into an upper filler area and a lower mixed liquid area through a grid plate. An air power source flap pulse stirring device is set in the lower mixed liquid area, which stirs the mixed liquid in the lower mixed liquid area through the pulse pitch swing of the flap, and after a trace of air is released, it can also flush the grid plate holes to avoid blockage. At the same time, it can also disturb the upper filler and the mixed liquid to enhance the mixing effect. Since the amount of air is very small, it will not damage the anoxic environment; a water pump power source stirring device is set in the upper filler area, which extracts the mixed liquid from the lower mixed liquid area and then sprays it out at high speed from the upper filler area, thereby forming a circulation in the upper filler area, which can ensure that the filler is fully fluidized, and realize the exchange of the mixed liquid between the upper filler area and the lower mixed liquid area, and the mass transfer effect is good. Through the cooperation of the two stirring devices, not only can good stirring and mixing effects be achieved, but also mass transfer efficiency can be improved, better denitrification effects can be achieved, and trace air will not damage the anoxic environment. At the same time, the filler is set in the upper filler area. Blocked by the grid plate, the filler cannot enter the lower mixed liquid area and will not contact the water inlet of the air power source flap pulse stirring device and the water pump power source stirring device, which will not cause wear between the filler and the stirring equipment and interfere with the stable operation of the stirring equipment, extending the service life of the filler and the equipment. In addition, the stirring device has low cost and convenient operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of Embodiment 1 of a rural sewage treatment device with suspended fillers suitable for anoxic areas of the present invention (flap closed state);

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

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

[0030] Figure 4 for Figure 1 Schematic diagram of the flap closed state of the pneumatic power source flap pulse stirring device;

[0031] Figure 5 for Figure 4 Schematic diagram of the pneumatic power source flap pulse stirring device with the flap opened;

[0032] Figure 6 for Figure 4 Schematic diagram of the middle flap;

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

[0034] Figure 8 This is a top view of the arrangement position of the air power source flap pulse stirring device of Example 2 of the rural sewage treatment device suitable for anoxic areas with suspended fillers of the present invention.

[0035] [Description of Reference Numerals]

[0036] 1: Anoxic pool;

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

[0038] 213: gas collection area; 214: counterweight block; 215: hinge; 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: grid plate; 41: flange; 42: casing;

[0041] 5: Upper packing area;

[0042] 6: Lower mixed liquid area;

[0043] 7: MBBR suspended filler;

[0044] 8: air pipe;

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

[0046] 10: Electromagnetic air pump;

[0047] 11: Air main;

[0048] 12: beam;

[0049] 13: traction rope;

[0050] 14: Normal operation liquid level;

[0051] 15: Gas. DETAILED DESCRIPTION

[0052] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific embodiments. Figure 1The orientation is used as a reference.

[0053] The embodiment of the present invention proposes a rural sewage treatment device suitable for anoxic areas with suspended fillers, which divides the anoxic pool into an upper filler area and a lower mixed liquid area through a grid plate. An air power source flap pulse stirring device is set in the lower mixed liquid area, which stirs the mixed liquid in the lower mixed liquid area through the pulse pitch swing of the flap. After a trace of air is released, it can also flush the holes of the grid plate to avoid blockage. While flushing, it can also disturb the upper filler and the mixed liquid to enhance the mixing effect. Since the amount of air is very small, it will not destroy the anoxic environment; a water pump power source stirring device is set in the upper filler area, which extracts the mixed liquid from the lower mixed liquid area and then sprays it out at high speed from the upper filler area, thereby forming a circulation in the upper filler area, which can ensure that the filler is fully fluidized, and realize the exchange of the mixed liquid between the upper filler area and the lower mixed liquid area, and the mass transfer effect is good. Through the mutual cooperation of the two stirring devices, not only can a good stirring and mixing effect be achieved, but also the mass transfer efficiency can be improved, and a better denitrification effect can be achieved, and the trace air will not destroy the anoxic environment. At the same time, the filler is arranged in the upper filler area. Blocked by the grid plate, the filler cannot enter the lower mixed liquid area and will not contact the water inlet of the air power source flap pulse stirring device and the water pump power source stirring device, which will not cause wear between the filler and the stirring equipment and interfere with the stable operation of the stirring equipment, thereby extending the service life of the filler and the equipment. The stirring device has low cost and convenient operation and maintenance.

[0054] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention 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 present invention and to fully convey the scope of the present invention to those skilled in the art.

[0055] Embodiment 1:

[0056] Reference Figures 1 to 3The present embodiment provides a rural sewage treatment device suitable for anoxic areas with suspended fillers, including anoxic tank 1, air power source flap pulse stirring device 2 and water pump power source stirring device 3. A horizontal grid plate 4 is provided inside the anoxic tank 1, and the grid plate 4 divides the anoxic tank 1 into an upper filler area 5 and a lower mixed liquid area 6. MBBR suspended filler 7 is provided in the upper filler area 5, and 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 connect the liquid in the upper filler area 5 and the lower mixed liquid area 6. In the present 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 mm-45 mm and a square hole of 12 mm×12 mm on the grid, and the material is glass fiber reinforced plastic or stainless steel. Of course, the technical personnel in this field can select the specifications of the MBBR suspended filler 7 and the grid plate 4 according to actual needs. For example, the grid may have circular holes or long strip holes, as long as the MBBR suspended filler 7 can be intercepted and prevented from entering the lower mixed liquid zone 6. The material selection of the grid plate 4 is not limited by the present embodiment, but it is necessary to consider that the grid plate 4 is working underwater for a long time, and attention should be paid to the anti-corrosion performance of the selected material or necessary anti-corrosion treatment should be carried out. At the same time, in the present embodiment, the grid plate 4 is arranged at a position 550mm-650mm away from the bottom of the anoxic pool 1.

[0057] The air-powered flap pulse stirring device 2 is arranged in the lower mixed liquid area 6. It can periodically release gas 15 by collecting-releasing-recollecting gas in the gas collecting area 213, so that the flap 21 can swing in a pulsed pitching manner, thereby stirring the mixed liquid in the lower mixed liquid area 6. After a small amount of air is released, it can also flush the holes on the grid plate 4 to avoid blockage. At the same time, it can also disturb the MBBR suspended filler 7 and the mixed liquid in the upper filler area 5 to enhance the mixing effect. Since the amount of air is very small, it will not damage the oxygen-deficient environment. Specifically, the air-powered flap pulse stirring device 2 includes a flap 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 the top plate and the surrounding side walls. Any of the side walls is selected as the movable end 211, and the side wall opposite to the movable end 211 is the fixed end 212. The enclosed cavity is the gas 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, and 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 hinge 215 made of stainless steel 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 fixed connection method can be bolt connection or adhesive connection. 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 material of the flap 21 and the hinge 215 can also be selected according to actual needs.

[0058] An air distribution pipe 8 connected to the air collecting area 213 is arranged below the flap 21. The air distribution pipe 8 can selectively supply air to the air collecting area 213. 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. In order to facilitate the adjustment of the air supply volume, an air regulating valve 91 is also arranged on the air branch pipe 9. The air regulating valve 91 can adjust the amount of air in the air collecting area 213 on each flap 1, so that only a small amount of air is needed to stir the mixed liquid in the lower mixed liquid area 6.

[0059] like Figure 5 As shown, when a certain amount of gas 15 is accumulated in the gas collecting area 213, based on the Archimedean principle (i.e., an object immersed in a fluid is subject to an upward buoyancy, which is equal to the weight of the fluid displaced by the object), the gas 15 in the gas collecting area 213 will displace a portion of the water, so that the volume of the liquid displaced by the flap 21 (including the collected gas) as a whole increases, and then the buoyancy of the flap 21 begins to increase. When the buoyancy of the flap 21 is greater than its own gravity, the flap 21 rotates upward relative to the second fixing device 23, the movable end 211 separates from the first fixing device 22, and an angle is formed between the flap 21 and the second fixing 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 fixing device 23 is between 20-30 degrees; Figure 4As shown, when the gas 15 in the gas collection area 213 is reduced to a certain amount, based on the Archimedean principle, the flap 21 that loses the gas 15 becomes smaller than the volume of the liquid displaced by it before it carries the gas 15, and then the buoyancy of the flap 21 begins 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 begins to collect gas again. The periodic release of gas 15 by the flap 21 forms a pulse, and the pulse instantly releases the kinetic energy of the air and the gravitational potential energy of the flap to form a 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 specifically design the specific parameters such as the gas collection volume and gas collection time required for the gas collection area 213 according to the size, water storage capacity and treatment degree requirements of the actual anoxic pool, as well as the specific material and size of the flap 21.

[0060] At the same time, the air-powered flap pulse stirring device 2 of the present embodiment is preferably suitable for the treatment of rural sewage, because the depth of the anoxic pool of rural sewage is relatively small, the water storage depth is generally less than 3 meters, and the water pressure at the bottom of the pool is relatively small, while the sewage pools of some large municipal water plants are generally deeper, with a water storage depth of more than 5 meters. At this time, the water pressure on the flap 21 at the bottom of the pool will be very large, and a very large buoyancy is required to open the flap 21. In other words, the size of the flap 21 needs to be designed to be large enough and the air collection volume also needs to be very large to meet the requirements. Therefore, the air-powered flap pulse stirring device 2 shown in the present embodiment is not suitable for use in the sewage pools of deeper municipal water plants.

[0061] In order to facilitate the flap 21 to fall back better, the movable end 211 is an inclined surface tilted upward toward the fixed end 212, and a counterweight block 214 is provided above the inclined surface. The air power source flap pulse stirring device 2 can be arranged in one or more groups in the circumferential direction in the lower mixed liquid area 6. In this embodiment, the flap 21 is preferably arranged at a position 250mm-350mm away from the bottom of the anoxic pool 1, and as Figure 1 As shown, two groups are arranged at 180 degrees. Those skilled in the art can adjust the location and number of the air power source flap pulse stirring device 2 according to the actual size of the anoxic pool 1 and different requirements for stirring strength.

[0062] The water pump power source stirring device 3 is arranged in the upper packing area 5, which can extract the mixed liquid from the lower mixed liquid area 6 and then spray it out from the upper packing area 5 at high speed, thereby forming a circulation 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. Specifically, Figure 7As shown, the water pump power source stirring device 3 includes an inlet pipe assembly 31, an outlet pipe assembly 32 and a pipeline water pump 33. The inlet pipe assembly 31 is fixedly connected to the inlet of the pipeline water pump 33, and the outlet pipe assembly 32 is fixedly connected to the outlet of the pipeline water pump 33, so that the inlet pipe assembly 31, the outlet pipe assembly 32 and the pipeline water pump 33 form a whole, wherein the inlet pipe assembly 31 and the inlet of the pipeline water pump 33 are preferably connected by bonding, and the outlet pipe assembly 32 and the outlet of the pipeline water pump 33 are preferably connected by threads. Of course, the present invention is not limited to this, and those skilled in the art can select any connection form according to actual needs. Further, 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 passes through the grid plate 4 and extends into the lower mixed liquid area 6; the water outlet pipe assembly 32 includes a vertical pipe 321 and a horizontal pipe 322 with 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 is connected to the inside of the horizontal pipe 322. At the same time, the parallel beams on both sides of the horizontal pipe 322 are provided with multiple groups of nozzles 3221 in the opposite direction. In this embodiment, the water outlet pipe assembly 32 is preferably set at a position 150mm-250mm below the normal operating liquid level 14 of the anoxic pool 1, and the number of nozzles 3221 on both sides of the horizontal pipe 322 is set to 4 evenly distributed groups.

[0063] 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 bottom of the water inlet pipe assembly 31, and after being lifted by the pipeline water pump 33, it is ejected at high speed from the nozzle 3221 on the outlet pipe assembly 32 in the upper filling area 5, thereby forming a circulation in the upper filling area 5, which can ensure that the filler is fully fluidized, and realize the exchange of the mixed liquid between the upper filling 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 circulation in the upper filling area 5, the present embodiment designs the anoxic pool 1 as a square structure, and then sets the parallel crossbeams on both sides of the cross tube 322 at an angle of 30-45 degrees to the side wall of the anoxic pool 1. When the nozzle 3221 ejects the mixed liquid, the mixed liquid obliquely impacts the side wall of the anoxic pool 1, which is easy to generate a vortex phenomenon locally, thereby promoting the formation of a circulation in the upper filling area 5. Among them, the multiple groups of nozzles 3221 can be arranged parallel to the bottom of the anoxic pool 1, or can be arranged inclined toward the bottom of the anoxic pool 1. When inclined, it is preferably at an angle of 30-40 degrees to the pool bottom.

[0064] In order to fix the water pump power source stirring device 3 and facilitate its maintenance, a crossbeam 12 is fixed on the upper part of the anoxic pool 1, and a connecting rod 331 is provided on the end face of the pipeline water pump 33 away from the bottom of the anoxic pool 1. The connecting rod 331 is fixed to the crossbeam 12 by a 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 repaired, the traction rope 13 is untied from the crossbeam 12. The water pump power source stirring device 3 can be lifted out of the anoxic pool 1 as a whole without stopping the water supply, which is convenient and quick. At the same time, 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 opened at the center of the grid plate 4, and a mounting flange 41 is embedded in the circular hole. The flange 41 is fixedly connected to the sleeve 42 at one end facing the lower mixed liquid area 6, and the end of the water inlet pipe assembly 31 away from the pipeline water pump 33 is inserted into the lower mixed liquid area 6 from the flange 41 and the sleeve 42. The flange 41 and the sleeve 42 are set here. Not only does it set a limit for the lower part of the water pump power source stirring device 3, but it also ensures that the position where the water inlet pipe assembly 31 passes through the grid plate 4 has a certain sealing property, thereby ensuring that the MBBR suspended filler 7 will not enter the lower mixed liquid area 6. In this embodiment, the diameters of the flange 41 and the sleeve 42 are both DN90, the length of the sleeve 42 is 0.45m, the 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, and the pipe material of the sleeve 42, the water inlet pipe assembly 31 and the water outlet pipe assembly 32 is preferably UPVC (full name: Unplasticized Polyvinyl Chloride). Of course, it is not limited to this, and technical personnel in this field can choose the material and pipe diameter according to actual needs.

[0065] In summary, the air power source flap pulse stirring device 2 forms a circulation in the lower mixed liquid area 6 , and the water pump power source stirring device 3 forms a horizontal and vertical circulation in the upper filler area 5 . The trace gas released by the air power source flap pulse stirring device 2 can also disturb the MBBR suspended filler 7 and the mixed liquid in the upper filler area 5, avoid the MBBR suspended filler 7 from sinking to the bottom and accumulating, and can also wash the sediment on the grid plate 4 to avoid clogging the grid holes; 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 area 5 and then spray it out at high speed, which accelerates the exchange of the mixed liquid between the upper filler area 5 and the lower mixed liquid area 6, and also avoids the accumulation of sludge in the lower mixed liquid area 6 to affect the operation of the flap 21. The two 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 area 6 and contacting the air power source flap pulse stirring device 2, causing wear between them, and also avoid the MBBR suspended filler 7 from clogging the suction port of the water pump power source stirring device 3, and even causing the pipeline water pump 33 to become abnormal with the suction of the mixed liquid, affecting the stable operation of the equipment. At the same time, when the flap 21 is opened, the actual amount of gas released is very small, and it is still in an intermittent working state, so it will not destroy the anoxic environment in the anoxic tank 1, will not affect the denitrification effect, and can ensure the stable operation of the process, thereby ensuring the sewage treatment effect. The whole set of stirring device has low cost and convenient operation and maintenance.

[0066] The use process of this embodiment 1 is briefly described as follows:

[0067] Turn on the electromagnetic air pump 10, then open the air regulating valve 91 and adjust it to a suitable size. At this time, gas begins to be collected in the gas collection area 213 of the flap 21. As the amount of gas collected increases, the buoyancy of the flap 21 gradually increases until the flap 21 opens, and the accumulated gas 15 overflows. As the gas 15 overflows, the flap 21 gradually falls back to a closed state under the influence of gravity, completing an opening and closing cycle. Next, gas collection begins again in the gas collection area 213, and stirring is completed by periodically opening and closing the flap 21 and releasing the gas 15. At the same time, the pipeline water pump 33 is started, and the water pump power source stirring device 3 extracts the mixed liquid from the lower mixed liquid area 6, and sprays it from the upper filling area 5 after being lifted, thereby forming a circulation.

[0068] When the water pump power source stirring device 3 is abnormal or needs to be repaired, there is no need to stop the water supply. The traction rope 13 can be untied and lifted from the beam 12, and the water pump power source stirring device 3 can be lifted out of the water surface of the anoxic pool 1 as a whole for repair or replacement.

[0069] Embodiment 2:

[0070] Reference Figure 8In order to enable the air power source flap pulse stirring device 2 to achieve a better stirring effect in the lower mixed liquid area 6, in this embodiment, the first fixing device 22 and the second fixing device 23 are designed to be square ring structures and are placed in the center of the bottom of the anoxic pool 1, that is, the first fixing device 22 and the second fixing device 23 are concentrically arranged, wherein the ring size of the first fixing device 22 is larger than the ring size of the second fixing device 23, and the distance between the two is just enough to install the flap 21.

[0071] Four groups of flaps 21 are arranged around the center of the bottom of the anoxic pool 1 between the first fixing device 22 and the second fixing device 23. The fixed ends 212 of the four groups of flaps 21 are rotatably connected to the four sides of the second fixing device 23 using hinges 215, and the movable ends 211 of the four groups of flaps 21 fall on the four sides of the first fixing device 22. The designs of the remaining parts except the flaps 21, the first fixing device 22 and the second fixing device 23 are the same as those in Example 1, and will not be described in detail here.

[0072] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0075] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0076] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rural sewage treatment device suitable for anoxic areas with suspended fillers, characterized in that: The invention comprises an anoxic tank (1), an air power source flap pulse stirring device (2) and a water pump power source stirring device (3), wherein a horizontal grid plate (4) is arranged inside the anoxic tank (1), and the grid plate (4) divides the anoxic tank (1) into an upper filling area (5) and a lower mixed liquid area (6), and an MBBR suspended filling material (7) is arranged in the upper filling area (5), and the grid plate (4) can intercept the MBBR suspended filling material (7) in the upper filling area (5), and the holes therein can connect the upper filling area (5) and the lower mixed liquid area (6); The air power source flap pulse stirring device (2) is arranged in the lower mixed liquid area (6), and the air power source flap pulse stirring device (2) can stir the mixed liquid in the lower mixed liquid area (6) by the pulse pitch swing of the flap (21); The water pump power source stirring device (3) is arranged in the upper filling area (5), and the water pump power source stirring device (3) can extract the mixed liquid from the lower mixed liquid area (6) and then spray it out from the upper filling area (5), thereby forming a circulation between the upper filling area (5) and the lower mixed liquid area (6).

2. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 1, characterized in that: The air power source flap pulse stirring device (2) comprises the flap (21), a first fixing device (22) and a second fixing device (23), wherein the first fixing device (22) and the second fixing device (23) are arranged opposite to each other at the bottom of the anoxic pool (1); The flap (21) is an inverted shape with a cavity formed by a top plate and surrounding side walls, any one of the side walls is selected as a movable end (211), the side wall opposite to the movable end (211) is selected as a fixed end (212), and the enclosed cavity 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; An air distribution pipe (8) in communication with the air collection area (213) is provided below the flap (21), and the air distribution pipe (8) can selectively supply air to the air collection area (213); When a certain amount of gas (15) is accumulated in the gas collection area (213), the flap (21) rotates upward relative to the second fixing device (23), the movable end (211) is separated from the first fixing device (22), and an angle is formed between the flap (21) and the second fixing device (23). At this time, the flap (21) is in an open state, and the accumulated gas (15) overflows from the angle; When the gas (15) in the gas collecting area (213) is reduced to a certain amount, the flap (21) rotates downward relative to the second fixing device (23), and the movable end (211) falls downward back onto the first fixing device (22), and at this time, the flap (21) is in a closed state; The air power source flap pulse stirring device (2) can be arranged in one or more groups in the circumferential direction within the lower mixed liquid zone (6).

3. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 2, characterized in that: The movable end (211) is an inclined surface tilted upwards towards the fixed end (212), and a counterweight block (214) is provided above the inclined surface; The fixed end (212) and the second fixing device (23) are rotatably connected via a hinge (215); When the flap (21) is in an open state, the angle formed between the flap (21) and the second fixing device (23) is between 20 and 30 degrees.

4. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 2, characterized in that: The air distribution pipe (8) is connected to an air main pipe (11) connected to an electromagnetic air pump (10) through an air branch pipe (9), and an air regulating valve (91) is provided on the air branch pipe (9).

5. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 2, characterized in that: The flap (21) is arranged at a position 250 mm to 350 mm away from the bottom of the anoxic pool (1).

6. A rural sewage treatment device suitable for anoxic areas with suspended fillers according to any one of claims 1 to 5, characterized in that: 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) passes 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) is internally connected to the horizontal pipe (322); The parallel cross beams on both sides of the cross tube (322) are provided with multiple groups of nozzles (3221) in opposite directions.

7. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 6, characterized in that: The anoxic pool (1) is a square structure, and the parallel beams on both sides of the transverse tube (322) are arranged at an angle of 30-45 degrees to the side wall of the anoxic pool (1); The plurality of groups of nozzles (3221) are all arranged parallel to the bottom of the anoxic pool (1), or are all arranged obliquely toward the bottom of the anoxic pool (1) and form an angle of 30-40 degrees with the bottom of the pool; The water outlet pipe assembly (32) is arranged at a position 150 mm to 250 mm below the normal operating liquid level (14) of the anoxic tank (1).

8. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 6, characterized in that: A circular hole is provided at the center of the grid plate (4), a mounting flange (41) is embedded in the circular hole, the flange (41) is fixedly connected to a sleeve (42) at one end facing the lower mixed liquid area (6), and the end of the water inlet pipe assembly (31) away from the pipeline water pump (33) penetrates from the flange (41) and the sleeve (42) into the lower mixed liquid area (6).

9. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 6, characterized in that: A crossbeam (12) is fixedly arranged on the upper part of the anoxic pool (1), and a connecting rod (331) is arranged on the end surface of the pipeline water pump (33) away from the bottom of the anoxic pool (1), and the connecting rod (331) is fixed to the crossbeam (12) via a traction rope (13).

10. A rural sewage treatment device with suspended fillers suitable for anoxic areas according to claim 6, characterized in that: The grid plate (4) is arranged at a position 550 mm to 650 mm from the bottom of the anoxic pool (1), and the grid plate (4) has a thickness of 25 mm to 45 mm, and the holes on the grid plate (4) are square holes of 12 mm×12 mm; The material of the grid plate (4) is glass fiber reinforced plastic or stainless steel.

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