Multistage aeration and air floatation combined sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, and discloses a multistage aeration and air floatation combined sewage treatment device which comprises a pretreatment unit, a multistage aeration unit, an air floatation unit and an intelligent control unit, the multi-stage aeration unit comprises at least two stages of aeration tanks which are connected in series, and an independent aeration device and a dissolved oxygen monitor are arranged in each stage of aeration tank; the air floatation unit comprises an air floatation tank, an air dissolving system and a scum collecting device; the intelligent control unit is used for adjusting the aeration intensity in real time according to data of the dissolved oxygen monitor. According to the sewage treatment device, large-particle impurities are effectively removed through the pretreatment unit; the multi-stage aeration unit realizes accurate aeration optimization and meets the requirements of different treatment stages; the air floatation unit adopts an advanced technology to improve the air floatation effect and efficiently collect and treat scum; the intelligent control unit accurately adjusts various parameters to ensure that the treatment process is efficient and stable; and the intermediate sedimentation tank reduces the load of the air floatation unit, improves the overall efficiency, and improves the sewage treatment efficiency and quality.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device combining multi-stage aeration and air flotation. Background Art

[0002] With the rapid development of industrialization and urbanization, the amount of sewage discharge has continued to increase, and water pollution has become increasingly serious. Traditional sewage treatment methods have certain limitations in terms of treatment efficiency, treatment effect and resource utilization.

[0003] In the traditional sewage treatment process, the aeration intensity and aeration volume of the aeration link are difficult to adjust accurately, which cannot meet the sewage treatment needs at different stages and affect the treatment effect. In flotation treatment, the generation and release of bubbles are not good, the parameter control of dissolved water is not precise enough, and the scum collection and treatment efficiency is low, which makes the overall effect of the flotation unit unsatisfactory. In addition, the intelligent control level of the sewage treatment process is low, and it is impossible to accurately collect and analyze key parameters in real time, making it difficult to achieve optimized control, resulting in unstable treatment efficiency and effect. At the same time, the sedimentation effect of the intermediate sedimentation link is limited, and it cannot effectively reduce the load of subsequent treatment units, affecting the overall treatment efficiency. In terms of water quality monitoring, traditional monitoring methods have problems with insufficient sensitivity and accuracy, and cannot provide reliable data support for the optimization and adjustment of the treatment process in a timely manner.

[0004] In summary, there are many problems with existing sewage treatment technologies, and an innovative sewage treatment device is urgently needed to solve these problems, improve the efficiency and quality of sewage treatment, and achieve sustainable utilization of water resources. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a sewage treatment device combining multi-stage aeration and air flotation to solve the above problems.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solutions: a sewage treatment device combining multi-stage aeration and air flotation, comprising a pretreatment unit, a multi-stage aeration unit, an air flotation unit and an intelligent control unit;

[0009] The pretreatment unit is used to remove large particles of impurities from sewage;

[0010] The multi-stage aeration unit includes at least two stages of aeration tanks connected in series, each stage of the aeration tank is provided with an independent aeration device and a dissolved oxygen monitor, and the aeration intensity of each stage of the aeration tank can be adjusted independently;

[0011] The flotation unit includes a flotation tank, a dissolved air system and a scum collection device. The dissolved air system uses micro-nano bubble generation technology, and the bubble diameter is less than 50 microns;

[0012] The intelligent control unit is used to adjust the aeration intensity in real time according to the data of the dissolved oxygen monitor, and automatically adjust the operating parameters of the dissolved air system according to the amount of scum in the flotation tank.

[0013] As a preferred technical solution of the present invention, in the multi-stage aeration unit, the aeration device of each aeration tank adopts a variable frequency aeration head, and the aeration intensity of each aeration tank is dynamically adjusted by the intelligent control unit according to the influent water quality and dissolved oxygen concentration to achieve graded aeration optimization.

[0014] As a preferred technical solution of the present invention, the air dissolving system of the air flotation unit includes a micro-nano bubble generator, an air dissolving tank and a releaser;

[0015] The micro-nano bubble generator uses high-frequency oscillation technology to produce bubbles with a diameter of less than 50 microns;

[0016] The dissolved gas tank is equipped with a pressure sensor and a gas concentration monitor to monitor the pressure and gas concentration of dissolved gas water in real time;

[0017] The releaser is made of porous ceramic material, and the bubble release is uniform and stable.

[0018] As a preferred technical solution of the present invention, the scum collecting device of the air flotation unit includes a scum scraper, a scum collecting tank and a scum dehydrator; the scum scraper adopts an intelligent control system to automatically adjust the scraping frequency according to the scum thickness;

[0019] The scum dehydrator adopts spiral extrusion dehydration technology, and the moisture content of the scum after dehydration is less than 60%.

[0020] As a preferred technical solution of the present invention, the intelligent control unit includes a data acquisition module, an analysis module and an execution module;

[0021] The data acquisition module is used to collect real-time parameters such as influent water quality, dissolved oxygen concentration, and slag volume in the flotation tank;

[0022] The analysis module is based on machine learning algorithms to predict the sewage treatment effect based on historical data and real-time data, and generate optimized control strategies;

[0023] The execution module is used to adjust the aeration intensity, the operating parameters of the dissolved air system and the operating status of the scum collection device according to the optimization control strategy.

[0024] As a preferred technical solution of the present invention, an intermediate sedimentation tank is provided between the multi-stage aeration unit and the flotation unit, and an inclined plate sedimentation device is provided in the intermediate sedimentation tank to further remove suspended matter in the sewage and reduce the load of the flotation unit.

[0025] As a preferred technical solution of the present invention, the device also includes an online water quality monitoring system, which includes a COD monitor, an ammonia nitrogen monitor and a total phosphorus monitor, which are used to monitor the effluent water quality in real time and feed the monitoring data back to the intelligent control unit.

[0026] As a preferred technical solution of the present invention, the inlet water quality parameters in the data acquisition module include chemical oxygen demand, biochemical oxygen demand, suspended solids, pH, etc.; the machine learning algorithm in the analysis module adopts a neural network algorithm, which can accurately predict the sewage treatment effect by learning and training a large amount of historical data; when the execution module adjusts the aeration intensity, the adjustment range of the aeration intensity can be controlled within ±10% to avoid excessive impact on the sewage treatment system. When adjusting the operating parameters of the dissolved air system, the pressure, gas concentration and bubble release amount of the dissolved air water can be adjusted in real time according to the change of the scum amount in the flotation tank. When adjusting the operating state of the scum collection device, the scraping frequency of the scum scraper and the operating time of the scum dehydrator can be adjusted in time according to the change of the scum thickness.

[0027] Compared with the prior art, the present invention provides a sewage treatment device combining multi-stage aeration and air flotation, which has the following beneficial effects:

[0028] Precise aeration optimization: The multi-stage aeration unit adopts a variable frequency aeration head and a dissolved oxygen monitor. The aeration intensity can be dynamically adjusted according to parameters such as influent water quality and dissolved oxygen concentration to achieve graded aeration optimization and accurately meet the sewage treatment needs at different stages.

[0029] Excellent flotation effect: The air dissolving system of the flotation unit adopts advanced micro-nano bubble generation technology to generate tiny bubbles with high specific surface area and activity, which improves the flotation effect; the internal structure of the air dissolving tank is exquisite, which can accurately monitor and control the parameters of the dissolved air water; the releaser has uniform and stable bubble release performance. The scraper of the scum collection device can automatically adjust the scraping frequency according to the thickness of the scum, and the dehydrator has strong dehydration capacity, which makes the scum moisture content less than 60%, which is convenient for subsequent treatment.

[0030] Intelligent and precise control: The intelligent control unit collects key parameters in real time through the data acquisition module. The analysis module accurately predicts the treatment effect and generates an optimized control strategy based on the neural network algorithm. The execution module accurately adjusts the aeration intensity, the operating parameters of the dissolved air system and the operating status of the scum collection device to ensure the efficiency and stability of the sewage treatment process.

[0031] Improve overall efficiency: An intermediate sedimentation tank is set between the multi-stage aeration unit and the flotation unit. Its inclined plate sedimentation device can efficiently remove suspended matter, reduce the load of the flotation unit, and improve the overall treatment efficiency.

[0032] Real-time water quality monitoring: The high-sensitivity and accuracy monitor of the online water quality monitoring system can monitor the effluent quality in real time and provide timely data support for the optimization and adjustment of the treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the multi-stage aeration unit of the present invention;

[0035] Figure 3 It is a structural schematic diagram of the air flotation unit and the water quality online monitoring system of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the gas dissolving system of the present invention;

[0037] Figure 5 It is a schematic diagram of the distribution of the pressure sensor and the gas concentration monitor of the present invention;

[0038] Figure 6 It is a schematic structural diagram of the slag collecting device of the present invention.

[0039] Among them: 1. Pretreatment unit; 2. Multi-stage aeration unit; 3. Air flotation unit; 4. Intelligent control unit; 5. Intermediate sedimentation tank; 6. Water quality online monitoring system;

[0040] 21. Aeration tank; 22. Aeration device; 23. Dissolved oxygen monitor;

[0041] 31. Air flotation tank; 32. Dissolved air system; 33. Scum collection device;

[0042] 321. Micro-nano bubble generator; 322. Dissolving gas tank; 323. Releaser;

[0043] 3221. Pressure sensor; 3222. Gas concentration monitor;

[0044] 331. Scum scraper; 332. Scum collecting tank; 333. Scum dehydrator;

[0045] 41. Data acquisition module; 42. Analysis module; 43. Execution module;

[0046] 51. Inclined plate sedimentation device;

[0047] 61. COD monitor; 62. Ammonia nitrogen monitor; 63. Total phosphorus monitor. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0049] It should be noted that if the embodiments of the invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the invention.

[0051] See also Figure 1-6 A sewage treatment device combining multi-stage aeration and flotation includes a pretreatment unit 1, a multi-stage aeration unit 2, a flotation unit 3, an intelligent control unit 4, an intermediate sedimentation tank 5 and an online water quality monitoring system 6.

[0052] The pretreatment unit 1 is equipped with a filter screen or a grid structure to effectively remove larger particle impurities in the sewage and prevent them from entering the subsequent treatment unit to cause blockage or damage the equipment.

[0053] The multi-stage aeration unit 2 includes at least two stages of aeration tanks 21 connected in series. An independent aeration device 22 is provided in each stage of the aeration tank 21. The aeration device 22 adopts a variable frequency aeration head, which has a sophisticated structural design and can accurately adjust the aeration intensity and aeration volume as needed; it is also equipped with a dissolved oxygen monitor 23, which can accurately monitor the dissolved oxygen concentration in the aeration tank in real time. The aeration intensity of each stage of the aeration tank 21 can be dynamically adjusted by the intelligent control unit 4 according to parameters such as the influent water quality and dissolved oxygen concentration to achieve graded aeration optimization and ensure that the sewage treatment needs at different stages are accurately met.

[0054] The flotation unit 3 includes an air flotation tank 31, an air dissolving system 32 and a scum collecting device 33. The air dissolving system 32 adopts advanced micro-nano bubble generation technology, wherein the micro-nano bubble generator 321 can stably generate tiny bubbles with a diameter of less than 50 microns through advanced technologies such as high-frequency oscillation. These tiny bubbles have extremely high specific surface area and activity, which can greatly improve the flotation effect; the air dissolving tank 322 has a sophisticated internal structure, and is equipped with a pressure sensor 3221 and a gas concentration monitor 3222, which can accurately monitor and control the pressure and gas concentration of the air dissolving water to ensure the stability of the air dissolving effect; the releaser 323 is made of special porous ceramic material, and has uniform and stable bubble release performance, ensuring that the bubbles can be evenly distributed in the air flotation tank. The scum collecting device 33 includes an intelligently controlled scum scraper 331, whose scraper structure is reasonably designed and can automatically adjust the scraping frequency according to the scum thickness, and efficiently scrape the scum into the scum collecting tank 332; the scum dehydrator 333 adopts efficient spiral extrusion dehydration technology, has a strong dehydration capacity, and can make the moisture content of the dehydrated scum lower than 60%, which is convenient for subsequent processing.

[0055] The intelligent control unit 4 includes a data acquisition module 41, which can collect key parameters of the influent water quality such as chemical oxygen demand COD, biochemical oxygen demand BOD, suspended solids SS, pH, dissolved oxygen concentration, scum amount in the flotation tank 31, etc. in real time through high-precision sensors; the analysis module 42 is based on a powerful neural network algorithm, and through learning and training a large amount of historical data, it can accurately predict the sewage treatment effect and generate an optimized control strategy; the execution module 43 accurately adjusts the aeration intensity according to the optimized control strategy, and the adjustment range is strictly controlled within ±10%, and the operating parameters of the dissolved air system 32 can be adjusted in real time and sensitively according to the changes in the scum amount in the flotation tank 31. The pressure, gas concentration and bubble release amount of the dissolved air water and the operating state of the scum collection device 33 can be adjusted in real time and effectively according to the changes in the scum thickness.

[0056] An intermediate sedimentation tank 5 is provided between the multi-stage aeration unit 2 and the flotation unit 3. The inclined plate sedimentation device 51 in the tank is composed of inclined flat plates and has a large sedimentation area. It can further efficiently remove suspended matter in the sewage, reduce the load of the flotation unit 3, and improve the overall treatment efficiency.

[0057] The online water quality monitoring system 6 includes a COD monitor 61, an ammonia nitrogen monitor 62 and a total phosphorus monitor 63. These monitors have high sensitivity and accuracy, can monitor the effluent quality in real time, and quickly and accurately feed back the monitoring data to the intelligent control unit 4, providing timely data support for the optimization and adjustment of the sewage treatment process.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sewage treatment device combining multi-stage aeration and air flotation, characterized in that: It comprises a pretreatment unit (1), a multi-stage aeration unit (2), an air flotation unit (3) and an intelligent control unit (4); The pretreatment unit (1) is used to remove large particle impurities in sewage; The multi-stage aeration unit (2) comprises at least two stages of aeration tanks (21) connected in series, each stage of the aeration tank (21) is provided with an independent aeration device (22) and a dissolved oxygen monitor (23), and the aeration intensity of each stage of the aeration tank (21) can be independently adjusted; The air flotation unit (3) comprises an air flotation tank (31), an air dissolving system (32) and a scum collecting device (33); the air dissolving system (32) adopts micro-nano bubble generation technology, and the bubble diameter is less than 50 micrometers; The intelligent control unit (4) is used to adjust the aeration intensity in real time according to the data of the dissolved oxygen monitor (23), and automatically adjust the operating parameters of the dissolved air system (32) according to the amount of scum in the flotation tank (31).

2. A sewage treatment device combining multi-stage aeration and air flotation according to claim 1, characterized in that: In the multi-stage aeration unit (2), the aeration device (22) of each stage of the aeration tank (21) adopts a variable frequency aeration head, and the aeration intensity of each stage of the aeration tank (21) is dynamically adjusted by the intelligent control unit (4) according to the influent water quality and dissolved oxygen concentration, so as to achieve hierarchical aeration optimization.

3. A sewage treatment device combining multi-stage aeration and air flotation according to claim 1, characterized in that: The air dissolving system (32) of the air flotation unit (3) comprises a micro-nano bubble generator (321), an air dissolving tank (322) and a releaser (323); The micro-nano bubble generator (321) generates bubbles with a diameter less than 50 micrometers through high-frequency oscillation technology; The gas dissolving tank (322) is provided with a pressure sensor (3221) and a gas concentration monitor (3222) for real-time monitoring of the pressure and gas concentration of the gas-dissolving water; The releaser (323) is made of porous ceramic material, and the bubble release is uniform and stable.

4. The sewage treatment device combining multi-stage aeration and air flotation according to claim 1 is characterized in that: The scum collecting device (33) of the air flotation unit (3) comprises a scum scraper (331), a scum collecting tank (332) and a scum dehydrator (333); the scum scraper (331) adopts an intelligent control system to automatically adjust the scraping frequency according to the scum thickness; The scum dehydrator (333) adopts a screw extrusion dehydration technology, and the moisture content of the scum after dehydration is less than 60%.

5. The sewage treatment device combining multi-stage aeration and air flotation according to claim 1 is characterized in that: The intelligent control unit (4) comprises a data acquisition module (41), an analysis module (42) and an execution module (43); The data acquisition module (41) is used to collect parameters such as influent water quality, dissolved oxygen concentration, and scum amount in the flotation tank (31) in real time; The analysis module (42) predicts the sewage treatment effect based on historical data and real-time data based on a machine learning algorithm, and generates an optimized control strategy; The execution module (43) is used to adjust the aeration intensity, the operating parameters of the aeration system (32) and the operating state of the scum collection device (33) according to the optimization control strategy.

6. The sewage treatment device combining multi-stage aeration and air flotation according to claim 1 is characterized in that: An intermediate sedimentation tank (5) is provided between the multi-stage aeration unit (2) and the air flotation unit (3), and an inclined plate sedimentation device (51) is provided in the intermediate sedimentation tank (5) for further removing suspended matter in the sewage and reducing the load of the air flotation unit (3).

7. The sewage treatment device combining multi-stage aeration and air flotation according to claim 1 is characterized in that: The device further comprises an online water quality monitoring system (6), wherein the online water quality monitoring system (6) comprises a COD monitor (61), an ammonia nitrogen monitor (62) and a total phosphorus monitor (63), and is used for real-time monitoring of effluent water quality and feeding back monitoring data to the intelligent control unit (4).

8. The sewage treatment device combining multi-stage aeration and air flotation according to claim 5 is characterized in that: The influent water quality parameters in the data acquisition module (41) include chemical oxygen demand (COD), biochemical oxygen demand (BOD), suspended solids (SS), pH, etc.; the machine learning algorithm in the analysis module (42) adopts a neural network algorithm, which can accurately predict the sewage treatment effect by learning and training a large amount of historical data; when adjusting the aeration intensity, the execution module (43) can control the adjustment range of the aeration intensity within ±10% to avoid causing excessive impact on the sewage treatment system; when adjusting the operating parameters of the dissolved air system (32), the pressure, gas concentration and bubble release amount of the dissolved air water can be adjusted in real time according to the change of the scum amount in the flotation tank (31); when adjusting the operating state of the scum collection device (33), the scraping frequency of the scum scraper (331) and the operating time of the scum dehydrator (333) can be adjusted in time according to the change of the scum thickness.

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