Low-energy-consumption biological membrane efficient sewage treatment equipment

Abstract

The utility model relates to the technical field of sewage treatment, in particular to low-energy-consumption biological membrane efficient sewage treatment equipment which structurally comprises a treatment tank box body, the bottom of the treatment tank box body is of a mud bucket-shaped structure, and a first partition plate and a second partition plate are arranged in the treatment tank box body. The first partition plate and the second partition plate sequentially divide the treatment pond box body into an unpowered anoxic zone, an aerobic zone and a settling zone from left to right, a water inlet pipe communicated with the unpowered anoxic zone is arranged on the left side of the treatment pond box body, and a water outlet pipe communicated with the settling zone is arranged on the right side of the treatment pond box body; according to the utility model, the gas stripping reflux device is arranged, so that mud-water mixed liquid in the aerobic zone flows back to the unpowered anoxic zone through the gas stripping reflux device during use, and a reflux pump and a stirrer do not need to work, so that the structure of the sewage treatment equipment is simplified; therefore, the energy consumption of the sewage treatment system is effectively reduced while the sewage treatment efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to low-energy-consumption biofilm high-efficiency sewage treatment equipment. Background Art

[0002] With the development of cities, the population has increased dramatically, resulting in a sharp increase in urban water consumption, and then a large amount of urban sewage has appeared. Integrated sewage treatment equipment is a widely used wastewater treatment equipment. It has the advantages of small footprint, convenient sewage treatment, and low investment cost. Therefore, it has been widely used in urban sewage treatment.

[0003] The patent document with the patent number of CN205773901U discloses an integrated system for sewage treatment and sludge disposal, including an anoxic treatment tank, an aerobic treatment tank, a sludge sedimentation tank, an anaerobic fermentation tank and a struvite recovery tank. The effluent of the anoxic treatment tank enters the aerobic treatment tank through the outlet of the anoxic treatment tank, and the effluent of the aerobic treatment tank enters the sludge sedimentation tank through the outlet of the aerobic treatment tank. The sludge precipitated in the sludge sedimentation tank is pumped into the anaerobic fermentation tank by a sludge discharge pump through the sludge discharge port of the sludge sedimentation tank, and the fermented anaerobic sludge fermentation liquid is pumped into the struvite recovery tank by a fermentation liquid pump;

[0004] The following deficiencies still exist in its practical application: In the current sewage treatment system, in order to ensure that the sludge maintains a good suspension state in the anoxic tank, it is usually necessary to install an agitator in the anoxic tank to stir the sludge. In addition, in order to effectively transport the mud-water mixture in the aerobic tank to the anoxic tank, it is also necessary to rely on a reflux pump for transportation, which not only increases the structural complexity of the system, but also leads to higher energy consumption of the equipment operation. Utility Model Content

[0005] The utility model provides a low-energy consumption biofilm high-efficiency sewage treatment device, which can effectively solve the above problems.

[0006] The utility model is achieved in this way:

[0007] A low-energy biofilm high-efficiency sewage treatment equipment, the structure of which includes a treatment tank body, the bottom of the treatment tank body is a mud bucket-shaped structure, a first partition and a second partition are arranged in the treatment tank body, the first partition and the second partition divide the treatment tank body from left to right into an unpowered anoxic zone, an aerobic zone, and a sedimentation zone, a water inlet pipe connected to the unpowered anoxic zone is arranged on the left side of the treatment tank body, a water outlet pipe connected to the sedimentation zone is arranged on the right side of the treatment tank body, a first channel for connecting the unpowered anoxic zone with the aerobic zone is arranged at the bottom of the first partition, a second channel for connecting the aerobic zone with the sedimentation zone is arranged at the bottom of the second partition, and a first mud retaining plate fixed to the first partition and extending downward is arranged in the unpowered anoxic zone The aerobic zone is provided with a biofilm filler, and an aeration device is provided at the bottom of the aerobic zone. The first baffle is also provided with a reflux hole connected to the unpowered anoxic zone. An air lift reflow device is provided at the right side of the first baffle corresponding to the reflux hole. A sludge separator is provided in the sedimentation zone, and an overflow plate is provided at the corresponding position of the water inlet pipe. An air supply device connected to the air lift reflow device and the aeration device is also provided on the right side of the treatment tank body; the air lift reflow device includes a guide cover arranged on the right side of the first baffle corresponding to the reflux hole, the bottom of the guide cover is connected to the aerobic zone, and the left side is connected to the reflux hole. An air guide pipe is also provided at the bottom of the guide cover, and air outlet holes are evenly distributed on the top of the air guide pipe, and the air guide pipe is connected to the air supply device.

[0008] As a further improvement, the sludge separator includes a second baffle and a third baffle which are arranged in the sedimentation area from top to bottom, the second baffle and the third baffle are both arranged below the overflow plate, the second baffle is arranged on the right side of the sedimentation area and extends downward, the third baffle is arranged on the right side of the second partition and extends downward, and a number of exhaust holes are evenly distributed on one end of the second baffle close to the right side of the treatment tank body.

[0009] As a further improvement, a water distribution box is provided at a position corresponding to the water inlet pipe in the unpowered anoxic zone, the water distribution box is connected to the water inlet pipe, and a plurality of water distribution holes are evenly distributed at the bottom of the water distribution box.

[0010] As a further improvement, the overflow plate is in an "L"-shaped structure, and a fourth fender is provided on the left side of the overflow plate, and a gap is provided between the fourth fender and the overflow plate for the purified water in the sedimentation area to pass through.

[0011] As a further improvement, a mud discharge pipe is provided at one end of the bottom of the treatment tank body close to the sedimentation area.

[0012] As a further improvement, the treatment tank body is provided with a cover plate installed on the top of the unpowered anoxic zone, the aerobic zone and the sedimentation zone.

[0013] As a further improvement, the angle between the bottom of the first fender and the first partition is 45°-65°.

[0014] As a further improvement, the air guide tube is a rectangular ring structure.

[0015] The beneficial effects of the utility model are:

[0016] The utility model is provided with an air lift reflux device, which can return the mud-water mixture in the aerobic zone to the unpowered anoxic zone through the air lift reflux device when in use, without the need for a reflux pump and a stirrer, thereby simplifying the structure of the sewage treatment equipment, thereby ensuring the sewage treatment efficiency and effectively reducing the energy consumption of the sewage treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a structural schematic diagram of a low-energy consumption biofilm high-efficiency sewage treatment equipment provided by the utility model;

[0019] Figure 2 It is a schematic diagram of a half-section structure of a treatment pool box provided by the utility model;

[0020] Figure 3 It is a schematic diagram of a half-section structure of a treatment pool box provided by the utility model;

[0021] Figure 4 The utility model provides Figure 3 A is a schematic diagram of the enlarged structure of FIG.

[0022] Figure 5 It is a schematic diagram of the structure of the rear view of the treatment pool box provided by the utility model;

[0023] Figure 6 It is a structural schematic diagram of the gas lift reflux device provided by the utility model;

[0024] Figure 7 It is a schematic diagram of sewage flow in a treatment tank box provided by the utility model.

[0025] In the figure: treatment tank body-1, first baffle-11, second baffle-12, unpowered anoxic zone-2, aerobic zone-3, sedimentation zone-4, water inlet pipe-5, water outlet pipe-6, first fender-21, biofilm filler-31, aeration device-32, reflux hole-111, air lift return device-33, overflow plate-41, air supply device-7, second baffle-42, third baffle-43, exhaust hole-421, guide cover-331, air guide pipe-332, air outlet hole-333, water distribution box-22, water distribution hole-221, fourth fender-44, mud discharge pipe-8, cover plate-9. DETAILED DESCRIPTION

[0026] In order to make the embodiments of the utility model, all belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but only represents the selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] In the current sewage treatment system, in order to ensure that the sludge maintains a good suspension state in the anoxic tank, it is usually necessary to install an agitator in the anoxic tank to stir the sludge. In addition, in order to effectively transport the mud-water mixture in the aerobic tank to the anoxic tank, it is also necessary to rely on a reflux pump for transportation, which not only increases the structural complexity of the system, but also leads to high energy consumption of equipment operation. In order to solve the above technical problems, this case proposes the following technical solutions:

[0029] Reference Figures 1 to 7As shown, a low-energy consumption biofilm high-efficiency sewage treatment equipment, the structure of which includes a treatment tank box 1, the bottom of the treatment tank box 1 is a mud bucket-shaped structure, a first partition 11 and a second partition 12 are arranged in the treatment tank box 1, the first partition 11 and the second partition 12 divide the treatment tank box 1 from left to right into an unpowered anoxic zone 2, an aerobic zone 3, and a sedimentation zone 4, the left side of the treatment tank box 1 is provided with an inlet pipe 5 connected to the unpowered anoxic zone 2, the right side of the treatment tank box 1 is provided with an outlet pipe 6 connected to the sedimentation zone 4, the bottom of the first partition 11 is provided with a first channel for connecting the unpowered anoxic zone 2 with the aerobic zone 3, the bottom of the second partition 12 is provided with a There is a second channel for connecting the aerobic zone 3 and the sedimentation zone 4. The unpowered anoxic zone 2 is provided with a first fender 21 fixed to the first baffle 11 and extending downward. The aerobic zone 3 is provided with a biofilm filler 31, and an aeration device 32 is provided at the bottom of the aerobic zone 3. The first baffle 11 is also provided with a reflux hole 111 connected to the unpowered anoxic zone 2. An air lift reflux device 33 is provided at the right side of the first baffle 11 corresponding to the reflux hole 111. A sludge separator is provided in the sedimentation zone 4, and an overflow plate 41 is provided at the corresponding position of the water inlet pipe 5. The right side of the treatment tank body 1 is also provided with an air supply device 7 connected to the air lift reflux device 33 and the aeration device 32;

[0030] The bottom of the reflux hole 111 is flush with the liquid surface of the unpowered anoxic zone 2, thereby preventing the sewage in the unpowered anoxic zone 2 from directly entering the aerobic zone 3, and ensuring that the sludge in the aerobic zone 3 enters the unpowered anoxic zone 2 through the reflux hole 111 under the action of the air lift reflux device 33 and mixes with the sewage, thereby forming a circulating flow;

[0031] At the same time, the top of the treatment tank body 1 is a rectangular structure, and the bottom is a bucket-shaped structure with four sides extending obliquely toward the middle. Therefore, when the sewage enters the unpowered anoxic zone 2, the sewage flows downward by gravity and flows into the bottom of the aerobic zone 3 along the bottom slope without other power, thereby reducing the energy consumption of sewage treatment. After the sludge enters the sedimentation zone 4, under the action of the sludge separator, the sludge sinks and returns to the middle of the bottom of the treatment tank body 1 along the bottom slope of the treatment tank body 1, and a part of the sludge returns to the unpowered anoxic zone 2 through the reflux hole 111 under the action of the aeration device 32 and the air lift return device 33 to ensure sufficient sludge concentration.

[0032] The air supply device 7 includes an electronic control unit and a fan. The electronic control unit controls the fan to start working during operation. The fan is connected to the air pipes of the aeration device 32 and the air lift return device 33 through an air supply pipe to supply air. The fan can also be replaced by an air compressor. The air supply pipe and the air pipe connection ends of the aeration device 32 and the air lift return device 33 are respectively provided with regulating valves. The air intake volume is adjusted by the regulating valves to meet the needs under different sewage treatment conditions.

[0033] When the sewage reacts with the biofilm filler 31 through the aeration device 32 in the aerobic zone 3, the first fender 21 blocks oxygen and activated sludge from entering the unpowered anoxic zone 2, thereby maintaining the anaerobic environment in the unpowered anoxic zone 2, enhancing the efficiency of the sewage treatment system in the denitrification process, and ensuring the effective removal of total nitrogen in the sewage treatment process.

[0034] Therefore, when in use, the sewage enters the top of the unpowered anoxic zone 2 through the water inlet pipe 5, and the mud-water mixture naturally flows down under the action of gravity and enters the aerobic zone 3 along the first channel. The sewage reacts with the biofilm filler 31 through the aeration device 32 in the aerobic zone 3, thereby reducing the ammonia nitrogen, COD, and TP contents in the sewage. At the same time, part of the mud-water mixture in the aerobic zone 3 is refluxed to the front end of the unpowered anoxic zone 2 through the reflux hole 111 under the action of the air lift reflux device 33, mixed with the inlet water and synchronously enters the unpowered anoxic zone 2 for denitrification and denitrification reaction; after the other part of the sewage completes the reaction in the aerobic zone 3, it enters the sedimentation zone 4 along the second channel, and the sludge is separated by the sludge separator, and the clear liquid is discharged into the outlet pipe 6 through the overflow plate 41. Therefore, the sewage treatment equipment refluxes to the unpowered anoxic zone 2 through the air lift reflux device 33, and does not need the reflux pump and the agitator to work, thereby simplifying the structure of the sewage treatment equipment, thereby ensuring the sewage treatment efficiency while effectively reducing the energy consumption of the sewage treatment system.

[0035] Specifically, the sludge separator includes a second baffle 42 and a third baffle 43 which are arranged in the sedimentation zone 4 from top to bottom, the second baffle 42 and the third baffle 43 are both arranged below the overflow plate 41, the second baffle 42 is arranged on the right side of the sedimentation zone 4 and extends downward, the third baffle 43 is arranged on the right side of the second partition 12 and extends downward, and a plurality of exhaust holes 421 are evenly distributed on one end of the second baffle 42 close to the right side of the treatment tank box 1, wherein the angle between the bottom of the second baffle 42 and the right side of the treatment tank box 1 is 60°, and the angle between the bottom of the third baffle 43 and the second partition 12 is 60°, and then the sewage enters the sedimentation zone 4 after being treated in the aerobic zone 3 and flows upward, and during the flow process, the second baffle 42 and the third baffle 43 block the sludge in the sewage, and the gas in the sewage is discharged upward through the exhaust holes 421.

[0036] The air lift recirculator 33 includes a guide cover 331 arranged on the right side of the first partition plate 11 corresponding to the reflux hole 111. The bottom of the guide cover 331 is connected to the aerobic zone 3, and the left side is connected to the reflux hole 111. The bottom of the guide cover 331 is also provided with an air guide pipe 332, and the top of the air guide pipe 332 is evenly distributed with air outlet holes 333. The air guide pipe 332 is connected to the air supply device 7. When in use, the air guide pipe 332 is supplied with air through the air supply device 7, so as to promote the mud-water mixture at the top of the aerobic zone 3 to overflow into the unpowered anoxic zone 2 through the reflux hole 111 in the guide cover 331, mix with the incoming water and synchronously enter the unpowered anoxic zone 2 for denitrification and denitrification reaction.

[0037] In addition, a water distribution box 22 is provided at a position corresponding to the unpowered anoxic zone 2 and the water inlet pipe 5. The water distribution box 22 is connected to the water inlet pipe 5, and a plurality of water distribution holes 221 are evenly distributed on the bottom of the water distribution box 22. Therefore, during operation, sewage enters the water distribution box 22 through the water inlet pipe 5 and is evenly distributed, and then enters the unpowered anoxic zone 2 evenly through the water distribution holes 221, ensuring that the sewage can be evenly distributed in the unpowered anoxic zone 2, effectively improving the efficiency of the anoxic reaction, and avoiding the problem of insufficient local treatment caused by uneven sewage flow.

[0038] The overflow plate 41 is in an "L"-shaped structure, and a fourth fender 44 is provided on the left side of the overflow plate 41. A gap is provided between the fourth fender 44 and the overflow plate 41 for the purified water in the sedimentation area 4 to pass through. When in use, the clear liquid overflows into the overflow groove of the overflow plate 41 through the gap between the fourth fender 44 and the overflow plate 41, and is discharged through the outlet pipe 6. In addition, a triangular weir is provided on the overflow plate 41, which not only ensures the smooth flow of water, but also can accurately control the overflow water level and reduce the fluctuation of the water flow, thereby effectively improving the sludge separation efficiency in the sedimentation area 4.

[0039] A sludge discharge pipe 8 is provided at one end of the bottom of the treatment tank body 1 near the sedimentation area 4. When in use, the sludge settled at the bottom of the treatment tank body 1 is discharged through the sludge discharge pipe 8 to avoid excessive accumulation of sludge at the bottom and affect the treatment effect.

[0040] The treatment tank box 1 is provided with a cover plate 9 installed on the top of the unpowered anoxic zone 2, the aerobic zone 3, and the sedimentation zone 4, which effectively prevents external air and impurities from entering the treatment area, while avoiding gas leakage during the treatment process, ensuring the efficiency and stability of the entire sewage treatment process. At the same time, the cover plate 9 is a corrugated type, which on the one hand enhances the strength and durability of the cover plate, and on the other hand also has a good anti-slip effect.

[0041] The angle between the bottom of the first mud guard plate 21 and the first partition plate 11 is 45°-65°, which effectively controls the flow direction of water and sludge, prevents the oxygen and activated sludge in the aerobic zone 3 from entering the unpowered anoxic zone 2, and ensures that the oxygen in the aerobic zone 3 does not interfere with the anoxic environment of the unpowered anoxic zone 2, thereby maintaining the water quality characteristics of each area.

[0042] The air guide pipe 332 is a rectangular ring structure, which ensures that the gas is evenly diffused in the air guide cover 331, avoiding the problem of uneven airflow or excessive local airflow intensity.

[0043] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-energy biofilm high-efficiency sewage treatment equipment, the structure of which includes a treatment tank box (1), characterized in that: The bottom of the treatment tank box (1) is in a mud bucket-shaped structure. A first partition (11) and a second partition (12) are provided in the treatment tank box (1). The first partition (11) and the second partition (12) divide the treatment tank box (1) into an unpowered anoxic zone (2), an aerobic zone (3), and a sedimentation zone (4) from left to right. A water inlet pipe (5) communicating with the unpowered anoxic zone (2) is provided on the left side of the treatment tank box (1). A water outlet pipe (6) communicating with the sedimentation zone (4) is provided on the right side of the treatment tank box (1). A first channel for communicating the unpowered anoxic zone (2) with the aerobic zone (3) is provided at the bottom of the first partition (11). A channel for communicating the aerobic zone (3) with the sedimentation zone (4) is provided at the bottom of the second partition (12). A second channel, wherein the unpowered anoxic zone (2) is provided with a first fender (21) fixed to the first baffle (11) and extending downward, the aerobic zone (3) is provided with a biofilm filler (31), and an aeration device (32) is provided at the bottom of the aerobic zone (3), the first baffle (11) is also provided with a reflux hole (111) communicating with the unpowered anoxic zone (2), an air lift reflux device (33) is provided on the right side of the first baffle (11) at a position corresponding to the reflux hole (111), a sludge separator is provided in the sedimentation zone (4), and an overflow plate (41) is provided at a position corresponding to the water inlet pipe (5), and an air supply device (7) connected to the air lift reflux device (33) and the aeration device (32) is also provided on the right side of the treatment tank body (1); The air lift recirculator (33) comprises a flow guide cover (331) arranged on the right side of the first baffle (11) corresponding to the reflow hole (111); the bottom of the flow guide cover (331) is connected to the aerobic zone (3), and the left side is connected to the reflow hole (111); an air guide pipe (332) is also arranged at the bottom of the flow guide cover (331); air outlet holes (333) are evenly distributed on the top of the air guide pipe (332); and the air guide pipe (332) is connected to the air supply device (7).

2. A low-energy biofilm high-efficiency sewage treatment equipment as claimed in claim 1, characterized in that: The sludge separator comprises a second baffle (42) and a third baffle (43) which are arranged in sequence from top to bottom in the sedimentation area (4); the second baffle (42) and the third baffle (43) are both arranged below the overflow plate (41); the second baffle (42) is arranged on the right side of the sedimentation area (4) and extends downward; the third baffle (43) is arranged on the right side of the second partition plate (12) and extends downward; and a plurality of exhaust holes (421) are evenly distributed at equal distances on one end of the second baffle plate (42) close to the right side of the treatment tank body (1).

3. A low-energy consumption biofilm high-efficiency sewage treatment equipment as claimed in claim 1 or 2, characterized in that: A water distribution box (22) is provided at a position corresponding to the unpowered anoxic zone (2) and the water inlet pipe (5); the water distribution box (22) is in communication with the water inlet pipe (5), and a plurality of water distribution holes (221) are evenly distributed on the bottom of the water distribution box (22).

4. A low-energy consumption biofilm high-efficiency sewage treatment equipment as claimed in claim 3, characterized in that: The overflow plate (41) is in an "L"-shaped structure, and a fourth fender (44) is provided on the left side of the overflow plate (41), and a gap is provided between the fourth fender (44) and the overflow plate (41) for the purified water in the sedimentation area (4) to pass through.

5. A low-energy consumption biofilm high-efficiency sewage treatment equipment as claimed in claim 4, characterized in that: A mud discharge pipe (8) is provided at one end of the bottom of the treatment tank body (1) close to the sedimentation area (4).

6. A low-energy consumption biofilm high-efficiency sewage treatment equipment as claimed in claim 5, characterized in that: The treatment tank body (1) is provided with a cover plate (9) installed on the top of the unpowered anoxic zone (2), the aerobic zone (3), and the sedimentation zone (4).

7. A low-energy consumption biofilm high-efficiency sewage treatment equipment as claimed in claim 1, characterized in that: The included angle between the bottom of the first fender (21) and the first partition (11) is 45°-65°.

8. A low-energy consumption biofilm high-efficiency sewage treatment equipment as claimed in claim 2, characterized in that: The air guide tube (332) is a rectangular ring structure.

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