An integrated sewage treatment device capable of adapting to changes in water inflow

Abstract

The present invention discloses an integrated sewage treatment device that can adapt to changes in water inflow, including: a tank body, a perforated plate fine grid, a pre-anoxic zone, an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone, a disinfection zone, a water inflow classification sensor, a rectifier, a first stirring air distribution pipe, a second stirring air distribution pipe, a third stirring air distribution pipe, an aeration pipe, an inclined pipe, a mud collecting tank, a mud-water mixed liquid air lift reflux component, a sedimentation sludge air lift reflux component, an air pump component and a controller. Since the water inflow classification sensor is used in conjunction with the controller, the aeration amount and reflux amount provided by the air pump are controlled in linkage according to the water inflow, so that the integrated sewage treatment device is not only more convenient to control, but also has a lower cost.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to an integrated sewage treatment device capable of adapting to changes in water inflow. Background Art

[0002] For integrated sewage treatment devices, due to the small sewage collection range, the coefficient of variation of its water inlet volume fluctuates greatly. Under normal circumstances, the aeration and backflow volume of the sewage treatment device cannot be automatically adjusted according to the water inlet volume, and excessive aeration and excessive backflow often occur, resulting in poor control of nitrogen and phosphorus in the sewage by the integrated sewage treatment device and energy waste.

[0003] In terms of adapting to changes in water volume, there are currently sewage treatment systems that install dissolved oxygen meters in aerobic areas and adjust the aeration volume by frequency conversion of blowers according to dissolved oxygen concentration. For example, Chinese patent application 201721681127.X discloses a sewage treatment system that can automatically adjust the aeration volume. This type of sewage treatment system requires the installation of dissolved oxygen meters and frequency converters, which will result in excessive investment and inconvenient operation and maintenance for small integrated sewage treatment devices.

[0004] At present, there are also sewage treatment devices that use two treatment systems. For example, Chinese patent application 201822053076.7 discloses a flow adaptive adjustment device for rural domestic sewage treatment equipment. According to the measurement results of the flow meter, the device only starts one of the treatment systems when the water volume is small, and at the same time diverts a part of the sewage to ensure the microbial activity of the other system. When the water volume is large, the two treatment systems operate together. However, this adaptive adjustment device requires a series of valves and multiple flow meters. If it is used in a small integrated sewage treatment device, it will occupy too much space and require a lot of operation and maintenance. Summary of the invention

[0005] Based on the problems existing in the prior art, the purpose of the present invention is to provide an integrated sewage treatment device that can adapt to changes in water inlet volume, which can solve the problems of existing integrated sewage treatment devices, such as excessive investment, excessive floor space, inconvenient operation and maintenance, and heavy workload in operation and maintenance.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] The embodiment of the present invention provides an integrated sewage treatment device capable of adapting to changes in water inflow, comprising:

[0008] Tank body, orifice plate fine grid, pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, disinfection zone, water inlet flow classification sensor, rectifier, first stirring air distribution pipe, second stirring air distribution pipe, third stirring air distribution pipe, aeration pipe, inclined pipe, mud collecting tank, mud-water mixed liquid air lift reflux component, sedimentation sludge air lift reflux component, air pump component and controller; wherein,

[0009] The pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and disinfection zone are respectively arranged in the tank body, and the pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and disinfection zone are connected in sequence;

[0010] The orifice plate fine grid is arranged at the front end of the pool body, at the front end of the water inlet pipe of the pre-anoxic zone;

[0011] The pre-anoxic zone is provided with a water inlet flow classification sensor, a rectifier cylinder and a first stirring air distribution pipe, respectively, and the water inlet flow classification sensor is connected to the water inlet pipe of the pre-anoxic zone;

[0012] A second stirring and air distribution pipe is provided in the anaerobic zone;

[0013] A third stirring and air distribution pipe is provided in the anoxic zone;

[0014] An aeration pipe is provided in the aerobic zone;

[0015] The sedimentation area is provided with an inclined pipe and a mud collecting tank;

[0016] A water outlet pipe is arranged at the rear end of the disinfection zone;

[0017] The aerobic zone is connected back to the anoxic zone through the mud-water mixed liquid gas stripping reflux component;

[0018] The sedimentation zone is connected back to the pre-anoxic zone through the sedimentation sludge gas stripping reflux component;

[0019] The air pump assembly is respectively connected to the first stirring air distribution pipe, the second stirring air distribution pipe, the third stirring air distribution pipe, the aeration pipe, the mud-water mixed liquid air stripping reflux assembly and the sedimentation sludge air stripping reflux assembly;

[0020] The controller is electrically connected to the water inlet flow classification sensor and the air pump assembly, respectively, and can control the air supply volume of the air pump output to match the flow operation mode signal given by the water inlet flow classification sensor. It can be seen from the technical solution provided by the present invention that the integrated sewage treatment device that can adapt to changes in water inlet provided by the embodiment of the present invention has the following beneficial effects:

[0021] By setting up a pre-anoxic zone, an anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and disinfection zone connected in sequence in the pool body, and setting up a water inlet flow classification sensor in the pre-anoxic zone, the air pump assembly supplying air to each stirring air distribution pipe and aeration pipe in the pre-anoxic zone, the anaerobic zone, the anoxic zone and the aerobic zone and the water inlet flow classification sensor are respectively connected to the controller, so that the controller can control the air supply volume of the air pump output to match the flow operation mode signal of the water inlet flow classification sensor, thereby adjusting the air supply volume of the entire integrated sewage treatment device according to the sewage inflow volume, so that the air supply volume always matches the sewage inflow volume. Because the water inlet flow classification sensor is used in conjunction with the controller, the aeration volume and reflux volume provided by the air pump are controlled in linkage according to the water inflow volume, making the integrated sewage treatment device not only more convenient to control, but also lower in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 A cross-sectional schematic diagram of an integrated sewage treatment device capable of adapting to changes in water inflow provided by an embodiment of the present invention;

[0024] Figure 2 A schematic plan view of an integrated sewage treatment device capable of adapting to changes in water inflow provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the middle-level plan of an integrated sewage treatment device capable of adapting to changes in water inflow provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the cross-sectional structure of an inlet flow classification sensor of an integrated sewage treatment device capable of adapting to changes in inlet water volume provided by an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the planar structure of an inlet flow classification sensor for an integrated sewage treatment device capable of adapting to changes in inlet flow provided by an embodiment of the present invention;

[0028] Figure 6 A schematic cross-sectional structure diagram of a multi-point water inlet distributor of an integrated sewage treatment device capable of adapting to changes in water inlet provided by an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the planar structure of a multi-point water inlet distributor of an integrated sewage treatment device capable of adapting to changes in water inlet provided by an embodiment of the present invention;

[0030] The components corresponding to the marks in the figure are: 1-water inlet pipe; 2-water inlet flow classification sensor; 3-multi-point water inlet distributor; 4-first stirring air supply pipe; 5-external return sludge conveying pipe; 6-second stirring air supply pipe; 7-internal return mixed liquor conveying pipe; 8-third stirring air supply pipe; 9-first air pump; 10-second air pump; 11-aeration air supply pipe; 12-internal return air lift pipe; 13-internal return air supply pipe; 14-external return air supply pipe; 15-external return air lift pipe; 16-water collecting tank in sedimentation zone; 17-water outlet pipe; 18-pre-anoxic zone; 19-first stirring air distribution pipe; 20-anaerobic zone; 21-anaerobic zone filler; 22-second stirring air distribution pipe; 23-anoxic zone; 24-anoxic zone filler; 25-third stirring air distribution pipe; 26-aerobic zone; 27-aerobic zone filler; 28-aeration pipe; 29-sedimentation zone; 30-sludge collecting tank; 31-inclined pipe; 32-disinfection zone; 33-controller; 34-disinfectant storage tank; 35-disinfectant dosing pipe;

[0031] 201-large flow limit contact; 202-large flow coaxial contact; 203-small flow limit contact; 204-small flow coaxial contact; 205-partition plate; 206-small flow sump; 207-medium flow guide trough; 208-large flow baffle plate;

[0032] 301-water collecting trough; 302-water distribution weir; 303-first water distribution plate; 304-anaerobic zone water distribution trough; 305-anaerobic zone water inlet; 306-anoxic zone water distribution trough; 307-anoxic zone water inlet; 308-pre-anoxic zone water distribution trough; 309-pre-anoxic zone water inlet; 310-second water distribution plate. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in combination with the specific content of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in this field.

[0034] like Figure 1 to Figure 3 As shown, an embodiment of the present invention provides an integrated sewage treatment device capable of adapting to changes in water inflow, comprising:

[0035] Tank body, orifice plate fine grid, pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, disinfection zone, water inlet flow classification sensor, rectifier, first stirring air distribution pipe, second stirring air distribution pipe, third stirring air distribution pipe, aeration pipe, inclined pipe, mud collecting tank, mud-water mixed liquid air lift reflux component, sedimentation sludge air lift reflux component, air pump component and controller; wherein,

[0036] The pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and disinfection zone are respectively arranged in the tank body, and the pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and disinfection zone are connected in sequence;

[0037] The orifice plate fine grid is arranged at the front end of the pool body, at the front end of the water inlet pipe of the pre-anoxic zone;

[0038] The pre-anoxic zone is provided with a water inlet flow classification sensor, a rectifying cylinder and a first stirring air distribution pipe, respectively. The water inlet flow classification sensor is connected to the water inlet pipe of the pre-anoxic zone; preferably, the first stirring air distribution pipe is arranged at the bottom of the pre-anoxic zone;

[0039] The anaerobic zone is provided with a second stirring and air distribution pipe; preferably, the second stirring and air distribution pipe is provided at the bottom of the anaerobic zone;

[0040] A third stirring and air distribution pipe is provided in the anoxic zone; preferably, the third stirring and air distribution pipe is provided at the bottom of the anoxic zone;

[0041] An aeration pipe is provided in the aerobic zone;

[0042] The sedimentation area is provided with an inclined pipe and a mud collecting tank;

[0043] The aerobic zone is connected back to the anoxic zone through the mud-water mixed liquid gas stripping reflux component;

[0044] The sedimentation zone is connected back to the pre-anoxic zone through the sedimentation sludge gas stripping reflux component;

[0045] A water outlet pipe is arranged at the rear end of the disinfection zone;

[0046] The air pump assembly is respectively connected to the first stirring air distribution pipe, the second stirring air distribution pipe, the third stirring air distribution pipe, the aeration pipe, the mud-water mixed liquid air stripping reflux assembly and the sedimentation sludge air stripping reflux assembly;

[0047] The controller is electrically connected to the water inlet flow classification sensor and the air pump assembly, respectively, and can control the air pump to output a matching air supply according to the flow operation mode signal given by the water inlet flow classification sensor.

[0048] like Figure 4 , 5As shown, in the above-mentioned integrated sewage treatment device, the water inlet flow classification sensor includes:

[0049] Limit contact support rod, bracket, large flow limit contact, small flow limit contact, large flow coaxial contact, coaxial contact support rod, small flow coaxial contact, rotating shaft, partition, small flow sump, medium flow guide trough and large flow baffle; among which,

[0050] The limit contact support rod is fixedly arranged on the pool wall of the pre-anoxic zone through the bracket;

[0051] The large flow limit contact is arranged at the front end of the limit contact support rod, and the small flow limit contact is arranged at the rear end of the limit contact support rod;

[0052] The large flow coaxial contact is arranged at the front end of the coaxial contact support rod, and the small flow coaxial contact is arranged at the rear end of the coaxial contact support rod;

[0053] The coaxial contact support rod is arranged on the rotating shaft below the limit contact support rod, and the coaxial contact support rod can rotate on the rotating shaft, so that the large flow coaxial contact contacts with the large flow limit contact at the front end of the limit contact support rod or the small flow coaxial contact contacts with the small flow limit contact at the rear end of the limit contact support rod;

[0054] The medium flow guide groove is arranged on the rotating shaft, fixedly connected with the coaxial contact support rod, and can rotate synchronously with the coaxial contact support rod on the rotating shaft; the upper end of the medium flow guide groove is provided with a water inlet, and the lower end is provided with a water outlet, and the water inlet is located below the outlet side of the water inlet pipe of the pre-anoxic zone;

[0055] The small flow water collecting trough is fixedly connected to the medium flow guide trough, is arranged at the front end of the medium flow guide trough, and is separated from the medium flow guide trough by a partition; the front end of the small flow water collecting trough is provided with a water inlet and outlet, and the water inlet and outlet are located directly below the outlet of the water inlet pipe of the pre-anoxic zone;

[0056] The large flow water baffle is fixedly connected to the medium flow guide groove and is arranged at the rear end of the medium flow guide groove. The free end of the large flow water baffle is located behind the outlet of the water inlet pipe of the anoxic zone.

[0057] By arranging the water inlet flow classification sensor of the above structure in the pre-anoxic zone, according to the principle that the horizontal drop point of the water flow in the water inlet pipe of the pre-anoxic zone is related to the water inlet volume, the water inlet flow classification sensor is driven by hydraulic power, and the water inlet flow classification sensor drives two coaxial contacts (large flow coaxial contact, small flow coaxial contact) when rotating along the rotating shaft. Through the relative connection relationship and duration of the two coaxial contacts and the two limit contacts (large flow limit contact, large flow limit contact), the controller (PLC) determines that the operation mode of the sewage treatment device at a certain moment is one of "large flow", "medium flow" and "small flow". Accordingly, the controller controls the opening and closing of related air pump components, realizes the matching of aeration volume and reflux volume with water inlet volume through graded air supply, and controls the disinfectant dosing pump at the same time to match the disinfectant dosage with the water flow.

[0058] The above-mentioned integrated sewage treatment device also includes: the multi-point water inlet distributor connected to the rear end of the water inlet flow classification sensor, the multi-point water inlet distributor is provided with multiple water outlets, each water outlet is respectively connected to the pre-anoxic zone, anaerobic zone and anoxic zone.

[0059] like Figure 6 , 7 As shown, in the above-mentioned integrated sewage treatment device, the multi-point water inlet distributor includes:

[0060] The water collecting tank, water distribution weir, first water distribution plate, second water distribution plate, anaerobic zone water distribution tank, anoxic zone water distribution tank, pre-anoxic zone water distribution tank, anaerobic zone water inlet, anoxic zone water inlet and pre-anoxic zone water inlet; wherein,

[0061] The upper opening of the water collection tank is located below the outlet of the water inlet flow classification sensor;

[0062] The water distribution weir is arranged at the rear end outlet of the water collection tank, and the rear end outlet is connected to the anaerobic zone water distribution tank, the anoxic zone water distribution tank and the pre-anoxic zone water distribution tank at the same time;

[0063] The first water distribution plate is movably arranged at the front end of the common groove wall of the anaerobic zone water distribution groove and the anoxic zone water distribution groove through a rotating shaft, and the first water distribution plate can change the size of the anaerobic zone water distribution groove entrance or the anoxic zone water distribution groove entrance by changing the position of the movable end;

[0064] The second water distribution plate is movably arranged at the front end of the common groove wall of the anoxic zone water distribution groove and the pre-anoxic zone water distribution groove through a rotating shaft, and the second water distribution plate can change the size of the anoxic zone water distribution groove entrance or the pre-anoxic zone water distribution groove entrance by changing the position of the movable end;

[0065] The rear end of the anaerobic zone water distribution tank is provided with the anaerobic zone water inlet hole for letting water into the anaerobic zone;

[0066] The anoxic zone water inlet hole for letting water into the anoxic zone is arranged at the rear end of the anoxic zone water distribution tank;

[0067] The rear end of the pre-anoxic zone water distribution tank is provided with the pre-anoxic zone water inlet hole for letting water into the pre-anoxic zone.

[0068] Preferably, the water distribution weir 302 has a first arc surface and a second arc surface on one side facing the first water distribution plate 303 and the second water distribution plate 310, respectively;

[0069] The radius of the first arc surface is equal to the length of the first water diversion plate, the movable end of the first water diversion plate is in close contact with the surface of the first arc surface, and the movable end of the first water diversion plate is in close contact with the surface of the first arc surface to adjust the position;

[0070] The surface of the water distribution weir on the first arc surface is provided with a scale indicating the position of the first water distribution plate;

[0071] The radius of the second arc surface is equal to the length of the second water diversion plate, and the movable end of the second water diversion plate is in close contact with the surface of the second arc surface; the movable end of the second water diversion plate is in close contact with the surface of the second arc surface to adjust the position;

[0072] The surface of the water distribution weir on the second arc surface is provided with a scale indicating the position of the second water distribution plate.

[0073] This structure of the water distribution weir 302 facilitates the proportional water distribution to the pre-anoxic zone 18, the anaerobic zone 20 and the anoxic zone 23 by changing the water inlet section widths of the left and right grooves of the first water distribution plate 303 and the second water distribution plate 310.

[0074] By arranging the multi-point water inlet distributor of the above structure below the water inlet flow classification sensor, the water inlet can be distributed to the pre-anoxic zone, the anaerobic zone and the anoxic zone in proportion, so as to achieve the purpose of optimizing the denitrification conditions of the reflux liquid in the pre-anoxic zone, optimizing the anaerobic phosphorus release conditions in the anaerobic zone, optimizing the denitrification conditions in the anoxic zone, etc. The water distribution ratio of the multi-point water inlet distributor to the above three partitions can be manually adjusted by adjusting the positions of the first water distribution plate and the second water distribution plate to adapt to different water quality conditions.

[0075] In the above-mentioned integrated sewage treatment device, the air pump assembly adopts one air pump;

[0076] Or use two air pumps, in which the air volume of the second air pump is twice that of the first air pump. For example, the air volume of the first air pump is Q, and the air volume of the second air pump is 2Q. When it is judged to be in the high-flow operation mode, both the first air pump and the second air pump are turned on, and the air supply volume is 3Q; when it is judged to be in the medium-flow operation mode, the second air pump is turned on, and the air supply volume is 2Q; when it is judged to be in the low-flow operation mode, the first air pump is turned on, and the air supply volume is Q. By setting two air pumps with different air supply volumes to form an air pump assembly, it is possible to more flexibly achieve the adjustment of multiple gears of different air supply volumes, thereby meeting the needs of different sewage treatment volumes.

[0077] In the above-mentioned integrated sewage treatment device, the pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone and disinfection zone are all provided with a plurality of partitions, which divide the pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone and disinfection zone into a plurality of spaces connected from front to back, and the plurality of spaces connected in each zone are folded water flow channels that alternately flow upward and downward. This method of dividing the above partitions into a plurality of spaces, and the water flows upward or downward in the above spaces in turn, can optimize the hydraulic flow state and increase the retention time.

[0078] Preferably, in the above-mentioned integrated sewage treatment device, microbial carriers are provided in the anaerobic zone, the anoxic zone and the aerobic zone.

[0079] The above-mentioned integrated sewage treatment device also includes: a plurality of reagent dosing devices, which are respectively connected to the pre-anoxic zone, the anaerobic zone, the anoxic zone, the aerobic zone, and the sedimentation zone.

[0080] In the above-mentioned integrated sewage treatment device, the mud-water mixed liquid gas lift reflux component includes: an internal reflux gas lift lifting pipe and an internal reflux gas supply pipe; wherein the internal reflux gas lift lifting pipe is connected between the aerobic zone and the anoxic zone, and the internal reflux gas lift lifting pipe is connected to the air pump component through the internal reflux gas supply pipe;

[0081] The sedimentation sludge gas lift reflux component includes: an external reflux gas lift lifting pipe and an external reflux gas supply pipe; wherein, the external reflux gas lift lifting pipe is connected between the sedimentation zone and the pre-anoxic zone, and the external reflux gas lift lifting pipe is connected to the air pump component through the external reflux gas supply pipe.

[0082] Furthermore, a disinfectant storage box 34 is provided on the disinfection area 32, and the disinfectant storage box 34 is connected to the disinfection area 32 through a disinfectant dosing pipe 35 provided with a disinfectant dosing pump, so as to facilitate the dosing of disinfectants. Preferably, the controller is electrically connected to the disinfectant dosing pump, and can control the dosage of the disinfectant dosing pump according to the information of the air supply of the air pump assembly.

[0083] The integrated sewage treatment device of the present invention can adjust the aeration volume and the return volume in grades according to the sewage inflow volume, and can set the graded aeration volume and the return volume according to the change of the inflow volume, which is beneficial to improving the sewage treatment effect and energy saving. It can well solve the problem that the aeration volume and the return volume are difficult to cope with the change of water volume. Because the inflow flow classification sensor is used in conjunction with the controller, the aeration volume and the return volume are controlled in linkage according to the inflow volume, making the integrated sewage treatment device not only more convenient to control, but also lower in cost.

[0084] The embodiments of the present invention are described in further detail below.

[0085] like Figure 1 to Figure 3 As shown, an embodiment of the present invention provides an integrated sewage treatment device that can adapt to changes in water inflow, wherein a pre-anoxic zone 18, an anaerobic zone 20, an anoxic zone 23, an aerobic zone 26, a sedimentation zone 29 and a disinfection zone 32 are separated by partitions in the pool body, and the pre-anoxic zone 18, anaerobic zone 20, anoxic zone 23, aerobic zone 26, sedimentation zone 29 and disinfection zone 32 are connected in sequence.

[0086] An air pump assembly is arranged above the aerobic zone 26, and the air pump assembly consists of a first air pump 9 and a second air pump 10. The rated air volume of the first air pump 9 is 1 / 2 of that of the second air pump 10, and the rated air supply pressures of the two are the same.

[0087] The first stirring air distribution pipe is arranged in the pre-anoxic zone 18, the second stirring air distribution pipe is arranged in the anaerobic zone 20, the third stirring air distribution pipe is arranged in the anoxic zone 23, and the aeration pipe is arranged in the aerobic zone 26. The air required by each stirring air distribution pipe and the aeration pipe is provided by an air pump assembly.

[0088] A water inlet pipe 1 is provided at the front end of the pre-anoxic zone 18, and a water inlet flow classification sensor 2 connected to the water inlet pipe is provided in the pre-anoxic zone 18, which can classify the water inlet flow according to the difference in the water flow impact position of the water inlet flow classification sensor 2 according to the change of the water inlet flow. The structure of the water inlet flow classification sensor 2 is as follows Figure 4 , Figure 5As shown, when the flow in the water inlet pipe 1 is large, the water flow impacts the large flow baffle 208, and the water inlet flow classification sensor 2 will rotate clockwise along the axis, driving the large flow coaxial contact 202 to rotate clockwise until the large flow coaxial contact 202 contacts the large flow limit contact 201. The timing starts after the two contact, and it is judged to enter the large flow operation mode after the continuous contact for a certain period of time; when the flow in the water inlet pipe 1 is small, the water flow will fall into the small flow sump 206 and accumulate therein. When the amount of water in the small flow sump 206 accumulates to a certain value, under the action of gravity, the water inlet flow classification sensor 2 will rotate counterclockwise along the axis, driving the small flow coaxial contact 204 to rotate counterclockwise until the small flow coaxial contact 204 contacts the small flow limit contact. When the water flow in the water inlet pipe 1 is moderate, the water will fall into the medium flow guide groove 207. At this time, the water inlet flow grading sensor 2 will rotate counterclockwise along the axis, driving the small flow coaxial contact 204 to rotate counterclockwise until the small flow coaxial contact 204 contacts the small flow limit contact 203. After the two contacts, the timing starts. After a certain period of continuous contact, it is judged that the medium flow operation mode has been entered. According to different flow rate operation modes, corresponding signals for controlling the air pump components are sent to the controller, such as: the large flow rate operation mode corresponds to sending the air pump component control signal of the large air volume operation mode, the medium flow rate operation mode corresponds to sending the air pump component control signal of the medium air volume operation mode, and the small flow rate operation mode corresponds to sending the air pump component control signal of the small air volume operation mode;

[0089] Preferably, in order to ensure the stability of the operation of the sewage treatment device and prevent misjudgment caused by intermittent flow changes, it is set that when the large flow coaxial contact 202 is in continuous contact with the large flow limit contact 201 for 10 minutes, the large flow operation mode is entered; when the small flow coaxial contact 204 is in continuous contact with the small flow limit contact 203 for 10 minutes, the medium flow operation mode is entered; when the small flow coaxial contact 203 is in contact with the small flow limit contact 203 4 times or more within 20 minutes, the small flow operation mode is entered; when the above conditions are not met, it is judged to be in the small flow operation mode; before judging as other operation modes, the current operation mode is maintained; an alarm is triggered after each contact has no contact for 24 hours, and on-site inspection is required for problems such as blockage of the water inlet pipe 1, failure of the water inlet flow classification sensor 2, and blockage of the water inlet grille.

[0090] In the high-flow operation mode, the first air pump 9 and the second air pump 10 of the air pump assembly controlled by the controller operate simultaneously, and the air supply of the air lift pipe, the stirring air pipe and the aeration pipe reaches the maximum value (the high-flow operation mode of the air pump assembly), so that the sewage treatment device operates under the rated reflux flow, stirring intensity and aeration volume conditions to cope with the high-flow operation state; in the medium-flow operation mode, the first air pump 9 is stopped and the second air pump 10 is operated, and the air supply of the air lift pipe, the stirring air pipe and the aeration pipe is about 2 / 3 of the maximum value, and the reflux flow, stirring intensity and aeration volume of the sewage treatment device are about 2 / 3 of the rated value (the medium-flow operation mode of the air pump assembly); in the low-flow operation mode, the first air pump 9 is operated and the second air pump 10 is stopped, and the air supply of the air lift pipe, the stirring air pipe and the aeration pipe is about 1 / 3 of the maximum value, and the reflux flow, stirring intensity and aeration volume of the sewage treatment device are about 1 / 3 of the rated value (the small-flow operation mode of the air pump assembly). Through water inlet flow sensing and operating status classification, the impact of excessive aeration and excessive backflow on the system treatment effect can be reduced, while saving energy consumption.

[0091] The above-mentioned sewage treatment device also includes: a mud-water mixed liquid gas lift reflux component composed of an inner reflux gas lift pipe 12 and an inner reflux gas supply pipe; and a sedimentation sludge gas lift reflux component composed of an outer reflux gas lift pipe and an outer reflux gas supply pipe; wherein the inner reflux gas lift pipe 12 is connected between the aerobic zone and the anoxic zone, the inner reflux gas lift pipe is connected to the air pump component through the inner reflux gas supply pipe, and the mixed liquid in the aerobic zone 26 is refluxed to the anoxic zone 23 in the form of gas lift; the outer reflux gas lift pipe 15 is connected between the sedimentation zone and the pre-anoxic zone, the outer reflux gas lift pipe is connected to the air pump component through the outer reflux gas supply pipe, and the concentrated sludge in the sedimentation zone 29 is refluxed to the pre-anoxic zone 18 in the form of gas lift. The air required for each gas lift pipe is provided by the air pump component.

[0092] The sedimentation area 29 is provided with an inclined pipe 31 for separating mud and water, and a mud collecting tank 30 is provided at the bottom of the sedimentation area 29 .

[0093] A disinfectant storage box 34 is provided on the disinfection area 32 , and the disinfectant storage box 34 is connected to the disinfection area 32 through a disinfectant adding pipe 35 , so as to facilitate adding disinfectant. A water outlet pipe 17 is provided at the rear end of the disinfection area 32 .

[0094] Preferably, the pre-anoxic zone 18, the anaerobic zone 20, the anoxic zone 23, the aerobic zone 26, and the sedimentation zone 29 are all provided with a reagent dosing device, so as to facilitate the dosing of reagents such as carbon sources, flocculants, disinfectants, etc. according to the needs of sewage treatment.

[0095] Furthermore, in order to improve the efficiency of nitrogen and phosphorus removal and adapt to the water quality conditions in different seasons and different regions, a multi-point water inlet function can be selected. A multi-point water inlet distributor 3 is provided below the water inlet flow classification sensor 2 in the pre-anoxic zone 18, which can distribute the inlet water to the pre-anoxic zone 18, the anaerobic zone 20 and the anoxic zone 23 according to a set ratio. The structure of the multi-point water inlet distributor 3 is as follows: Figure 6 , Figure 7 As shown, the influent flows through the influent flow classification sensor 2 and falls into the water collection tank 301. Under the action of the water distribution weir 302, the first water distribution plate 303 and the second water distribution plate 310, the influent is distributed to the anaerobic zone water distribution tank 304, the anoxic zone water distribution tank 306 and the pre-anoxic zone water distribution tank 308 according to the set ratio, and finally enters the corresponding partitions through the anaerobic zone water inlet hole 305, the anoxic zone water inlet hole 307 and the pre-anoxic zone water inlet hole 309. The first water distribution plate 303 and the second water distribution plate 310 have the same size, one end is connected to the wall of the water distribution tank through an axis, and the other end is a movable end, and the above-mentioned water distribution plate can rotate along the axis; the water distribution weir 302 faces the first water distribution plate 303 and the second water distribution plate 310, and has two arc surfaces. The radius of the arc is the length of the above-mentioned water distribution plate, so that the movable end of the water distribution plate can be close to the arc. There are scales on the surface of the water distribution weir 302. By changing the water inlet section widths of the left and right grooves of the first water distribution plate 303 and the second water distribution plate 310, water can be distributed proportionally to the pre-anoxic zone 18, the anaerobic zone 20 and the anoxic zone 23. If the first water distribution plate 303 is rotated to be close to the side wall of the anoxic zone water distribution trough 306, no water will flow into the anoxic zone water distribution trough 306. At this time, water distribution to the anoxic zone 23 is stopped. By rotating the angle of the second water distribution plate 310, the water distribution ratio to the pre-anoxic zone 18 and the anaerobic zone 20 can be adjusted. When the water distribution ratio to the pre-anoxic zone 18 exceeds 50%, the movable end of the second water distribution plate 310 exceeds the intersection of the two arc surfaces on the water distribution weir 302. At this time, the accuracy of the water distribution ratio decreases. When the second water distribution plate 310 continues to rotate until its movable end contacts the first water distribution plate 303, there is no water flowing into the anaerobic zone water distribution trough 304. Water flows in, and water distribution to the anaerobic zone 20 and the anoxic zone 23 is stopped at this time, and the incoming water all flows into the pre-anoxic zone 18; if the movable ends of the first water distribution plate 303 and the second water distribution plate 310 are rotated to the intersection of the two arc surfaces on the water distribution weir 302, no water flows into the anaerobic zone water distribution trough 304 at this time, and water distribution to the anaerobic zone 20 is stopped at this time, and the incoming water is evenly distributed to the pre-anoxic zone 18 and the anoxic zone 23. When the first water distribution plate 303 and the second water distribution plate 310 are rotated at the same time and kept in contact with each other, the incoming water can be distributed between the pre-anoxic zone 18 and the anoxic zone 23 according to a certain ratio, and the anaerobic zone 20 is kept free of water.

[0096] Partitions are provided in the pre-anoxic zone 18, the anaerobic zone 20, the anoxic zone 23, the aerobic zone 26, and the disinfection zone 32 to optimize hydraulic conditions, reduce short-circuiting, enhance mixing effects, and create an environment suitable for the growth of microorganisms in each zone during the biochemical reaction stage. In the pre-anoxic zone 18, the raw sewage enters the first reaction zone of the pre-anoxic zone 18 after contacting the inlet flow classification sensor 2 through the inlet pipe 1. At this time, the external return sludge conveying pipe 5 conveys the external return sludge to the first reaction zone and mixes it with the raw sewage to form a mud-water mixture and moves downward. The mixture flows to both sides through the baffle opening at the bottom of the first reaction zone, enters the second reaction zone, and flows upward. It enters the third reaction zone through the upper baffle opening of the second reaction zone, and so on, until the water flows upward to the outlet weir in the sixth reaction zone and enters the anaerobic zone 20 from the top; the purpose of reducing dissolved oxygen and ensuring the anaerobic environment of the subsequent anaerobic zone 20 is achieved by mixing the raw water in the pre-anoxic zone 18 with the external return sludge, and the residual sludge in the return sludge can be partially hydrolyzed in this area to provide an internal carbon source for subsequent reactions. The anaerobic zone 20 has water inlet from the upper part, and the water outflow from the upper water outlet weir enters the anoxic zone; the anoxic zone 23 has water inlet from the upper part, and the water outflow from the upper water outlet weir enters the aerobic zone; the aerobic zone 26 has water inlet from the upper part, and the water outflow from the lower perforated wall enters the sedimentation zone; the sedimentation zone has water inlet from the lower perforated wall, and the water outflow from the upper water outlet weir, which enters the disinfection zone after being collected by the water collection tank; the disinfection zone has water inlet from the upper part, and the water outflow from the upper water outlet weir, which is collected by the water collection tank to the outlet pipe and discharged by gravity from this treatment device. Microbial carriers are added to the anaerobic zone 20, the anoxic zone 23, and the aerobic zone 26 to provide a place for microbial attachment and biofilm growth, forming a treatment technology based on the biofilm method to adapt to the situation where the water quality and water volume of rural sewage change significantly. Stirring air distribution pipes are set in the pre-anoxic zone 18, the anaerobic zone 20, and the anoxic zone 23. The mixing effect of each zone is ensured by automatically and intermittently introducing large bubbles, which promotes the renewal of the biofilm on the carrier in the anaerobic zone 20 and the anoxic zone 23; an aeration pipe is set in the aerobic zone 26 to provide oxygen for the aerobic reaction and ensure the mixing effect. A liquid disinfectant storage tank and a metering pump are set in the disinfectant storage box 34. The disinfectant is quantitatively added to the disinfection zone on both sides of the sedimentation zone through the disinfectant addition pipe 35 to ensure that the effluent hygiene indicators meet the corresponding standards.

[0097] In the case of insufficient carbon source in the influent, carbon source can be temporarily added to the anaerobic zone and the anoxic zone.

[0098] A perforated plate fine grid is arranged before the water inlet pipe 1 to prevent large-sized impurities from affecting the operation of the sewage treatment device.

[0099] The controller 33 is equipped with a PLC, which receives the signal from the contact of the water flow classification sensor 2 through an automated program, determines which operating mode should be adopted, controls the start and stop of the first air pump and the second air pump, and the dosage of the disinfectant storage tank 34, and realizes unattended and automated operation. The control box 33 is equipped with a gateway, which provides real-time feedback with the centralized control platform; the data platform analyzes the acquired data to form an analysis model, which can predict and verify the operating mode.

[0100] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An integrated sewage treatment device capable of adapting to changes in water inflow, characterized in that: include: Tank body, orifice plate fine grid, pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone, disinfection zone, water inlet flow classification sensor, rectifier, first stirring air distribution pipe, second stirring air distribution pipe, third stirring air distribution pipe, aeration pipe, inclined pipe, mud collecting tank, mud-water mixed liquid air lift reflux component, sedimentation sludge air lift reflux component, air pump component and controller; wherein, The pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and disinfection zone are respectively arranged in the tank body, and the pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and disinfection zone are connected in sequence; The orifice plate fine grid is arranged at the front end of the pool body, at the front end of the water inlet pipe of the pre-anoxic zone; The pre-anoxic zone is provided with a water inlet flow classification sensor, a rectifier cylinder and a first stirring air distribution pipe, respectively, and the water inlet flow classification sensor is connected to the water inlet pipe of the pre-anoxic zone; A second stirring and air distribution pipe is provided in the anaerobic zone; A third stirring and air distribution pipe is provided in the anoxic zone; An aeration pipe is provided in the aerobic zone; The sedimentation area is provided with an inclined pipe and a mud collecting tank; A water outlet pipe is arranged at the rear end of the disinfection zone; The aerobic zone is connected back to the anoxic zone through the mud-water mixed liquid gas stripping reflux component; The sedimentation zone is connected back to the pre-anoxic zone through the sedimentation sludge gas stripping reflux component; The air pump assembly is respectively connected to the first stirring air distribution pipe, the second stirring air distribution pipe, the third stirring air distribution pipe, the aeration pipe, the mud-water mixed liquid air stripping reflux assembly and the sedimentation sludge air stripping reflux assembly; The controller is electrically connected to the water inlet flow classification sensor and the air pump assembly, respectively, and can control the air supply volume of the air pump to match the output according to the flow operation mode signal of the water inlet flow classification sensor; The water inlet flow classification sensor includes: a limit contact support rod, a bracket, a large flow limit contact, a small flow limit contact, a large flow coaxial contact, a coaxial contact support rod, a small flow coaxial contact, a rotating shaft, a partition, a small flow sump, a medium flow guide trough and a large flow baffle; wherein, The limit contact support rod is fixedly arranged on the pool wall of the pre-anoxic zone through the bracket; The large flow limit contact is arranged at the front end of the limit contact support rod, and the small flow limit contact is arranged at the rear end of the limit contact support rod; The large flow coaxial contact is arranged at the front end of the coaxial contact support rod, and the small flow coaxial contact is arranged at the rear end of the coaxial contact support rod; The coaxial contact support rod is arranged on the rotating shaft below the limit contact support rod, and the coaxial contact support rod can rotate on the rotating shaft, so that the large flow coaxial contact contacts with the large flow limit contact at the front end of the limit contact support rod or the small flow coaxial contact contacts with the small flow limit contact at the rear end of the limit contact support rod; The medium flow guide groove is arranged on the rotating shaft, fixedly connected with the coaxial contact support rod, and can rotate synchronously with the coaxial contact support rod on the rotating shaft; the upper end of the medium flow guide groove is provided with a water inlet, and the lower end is provided with a water outlet, and the water inlet is located below the outlet side of the water inlet pipe of the pre-anoxic zone; The small flow water collecting trough is fixedly connected to the medium flow guide trough, is arranged at the front end of the medium flow guide trough, and is separated from the medium flow guide trough by the partition; the front end of the small flow water collecting trough is provided with a water inlet and outlet, and the water inlet and outlet are located directly below the outlet of the water inlet pipe of the pre-anoxic zone; The large flow water baffle is fixedly connected to the medium flow guide groove and is arranged at the rear end of the medium flow guide groove, and the free end of the large flow water baffle is located behind the outlet of the water inlet pipe of the anoxic zone; It also includes: a multi-point water inlet distributor connected to the rear end of the water inlet flow classification sensor, the multi-point water inlet distributor is provided with a plurality of water outlets, each water outlet is respectively connected to the pre-anoxic zone, the anaerobic zone and the anoxic zone; The multi-point water inlet distributor comprises: a water collection tank, a water distribution weir, a first water distribution plate, a second water distribution plate, an anaerobic zone water distribution tank, an anoxic zone water distribution tank, a pre-anoxic zone water distribution tank, an anaerobic zone water inlet hole, an anoxic zone water inlet hole and a pre-anoxic zone water inlet hole; wherein, The upper opening of the water collection tank is located below the outlet of the water inlet flow classification sensor; The water distribution weir is arranged at the rear end outlet of the water collection tank, and the rear end outlet is connected to the anaerobic zone water distribution tank, the anoxic zone water distribution tank and the pre-anoxic zone water distribution tank at the same time; The first water distribution plate is movably arranged at the front end of the common groove wall of the anaerobic zone water distribution groove and the anoxic zone water distribution groove through a rotating shaft, and the first water distribution plate can change the size of the anaerobic zone water distribution groove entrance or the anoxic zone water distribution groove entrance by changing the position of the movable end; The second water distribution plate is movably arranged at the front end of the common groove wall of the anoxic zone water distribution groove and the pre-anoxic zone water distribution groove through a rotating shaft, and the second water distribution plate can change the size of the anoxic zone water distribution groove entrance or the pre-anoxic zone water distribution groove entrance by changing the position of the movable end; The rear end of the anaerobic zone water distribution tank is provided with the anaerobic zone water inlet hole for letting water into the anaerobic zone; The anoxic zone water inlet hole for letting water into the anoxic zone is arranged at the rear end of the anoxic zone water distribution tank; The rear end of the pre-anoxic zone water distribution tank is provided with the pre-anoxic zone water inlet hole for inletting water into the pre-anoxic zone; The water distribution weir is provided with a first arc surface and a second arc surface on one side facing the first water distribution plate and the second water distribution plate respectively; The radius of the first arc surface is equal to the length of the first water diversion plate, and the movable end of the first water diversion plate is in close contact with the surface of the first arc surface; The surface of the water distribution weir on the first arc surface is provided with a scale indicating the position of the first water distribution plate; The radius of the second arc surface is equal to the length of the second water diversion plate, and the movable end of the second water diversion plate is in close contact with the surface of the second arc surface; The surface of the water distribution weir on the second arc surface is provided with a scale indicating the position of the second water distribution plate; It also includes: a plurality of reagent dosing devices, which are respectively connected to the pre-anoxic zone, the anaerobic zone, the anoxic zone, the aerobic zone, and the precipitation zone.

2. The integrated sewage treatment device capable of adapting to changes in water inflow according to claim 1 is characterized in that: The air pump assembly adopts one air pump; or adopts two air pumps, wherein the air volume of the second air pump is twice the air volume of the first air pump.

3. The integrated sewage treatment device capable of adapting to changes in water inflow according to claim 1 is characterized in that: The pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone and disinfection zone are each provided with a plurality of partitions, which separate the pre-anoxic zone, anaerobic zone, anoxic zone, aerobic zone and disinfection zone into a plurality of spaces connected from front to back, and the plurality of spaces connected in each zone are folded water flow channels with alternating upward and downward flows.

4. The integrated sewage treatment device capable of adapting to changes in water inflow according to claim 1 is characterized in that: Microbial carriers are arranged in the anaerobic zone, the anoxic zone and the aerobic zone.

5. The integrated sewage treatment device capable of adapting to changes in water inflow according to claim 1 is characterized in that: The mud-water mixture gas lift reflux assembly comprises: an internal reflux gas lift lifting pipe and an internal reflux gas supply pipe; wherein the internal reflux gas lift lifting pipe is connected between the aerobic zone and the anoxic zone, and the internal reflux gas lift lifting pipe is connected to the air pump assembly through the internal reflux gas supply pipe; The sedimentation sludge gas lift reflux component includes: an external reflux gas lift lifting pipe and an external reflux gas supply pipe; wherein, the external reflux gas lift lifting pipe is connected between the sedimentation zone and the pre-anoxic zone, and the external reflux gas lift lifting pipe is connected to the air pump component through the external reflux gas supply pipe.

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