Sewage treatment system

Abstract

The utility model relates to a sewage treatment system, which is characterized in that a mixing tank is arranged to complete the liquid collection work of five biochemical treatment core liquid loops, namely incoming water, medicament flow, nitrification liquid backflow, sludge backflow and effluent backflow in a previous process, so that the basic circulation of liquid for biochemical treatment is ensured; only one sewage pump set is arranged between the mixing tank and the anoxic tank, so that the liquid conveying work of five biochemical treatment core liquid loops including incoming water, medicament flowing, nitrification liquid backflow, sludge backflow and effluent backflow in the previous process can be completed, and a pump set does not need to be arranged in each biochemical treatment core liquid loop; the number of overall consumed equipment of the sewage treatment system is reduced, the installation cost, the maintenance cost and the electrical cost are effectively reduced, the space is saved, excessive liquid pipelines are not concentrated at the front end of the anoxic tank, and the overall safety of the system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a sewage treatment system. Background Art

[0002] Nowadays, sewage treatment technology is widely used in various fields such as chemical industry, textile printing and dyeing, pharmaceuticals, food, breeding, etc., and is increasingly entering the daily lives of ordinary people.

[0003] Among sewage treatment technologies, one of the most widely used methods is wastewater biochemical treatment.

[0004] The biochemical treatment of wastewater is referred to as "wastewater biochemical treatment". Its treatment principle is to use the metabolism of microorganisms to convert organic pollutants in the wastewater in dissolved and colloidal states into harmless substances. The most widely used process in the wastewater biochemical method is the A / O process (Anoxic Oxic, anoxic aerobic process).

[0005] like Figure 1 As shown, Figure 1 It is the process flow chart of the traditional A / O process. The core of this process is to set up two microbial pools, namely the anoxic pool and the aerobic pool. Microorganisms with different characteristics are put into the anoxic pool and the aerobic pool respectively. The microorganisms in the anoxic pool are easier to survive under anoxic conditions, and the microorganisms in the aerobic pool are easier to survive under aerobic conditions.

[0006] In the wastewater treatment system used by the traditional A / O process, there are five core liquid flow circuits:

[0007] 1) Water loop of the previous process. The sewage water of the A / O process is generally pumped by the previous process. The previous process may be other treatment processes, or it may just be a regulating tank for regulating water quality and quantity. In order to simplify the process, the regulating tank is used as a common embodiment. Figure 1 It is stated in the document that in order to ensure a stable wastewater flow into the A / O process, the first water pump is generally used to pump wastewater from the equalization tank to the anoxic tank.

[0008] 2) Chemical flow loop. In the sewage treatment process, chemicals may be added at the front end of the A / O process. These chemicals may be used to adjust the sewage quality or to enhance the processing capacity of microorganisms. Figure 1 The second water pump in the anoxic tank pumps water into the anoxic tank.

[0009] 3) Nitration liquid reflux loop. The removal of pollutants requires the sewage to circulate back and forth between the anoxic environment and the aerobic environment, so a pump is required at the end of the aerobic tank ( Figure 1 The third water pump is shown to return the sewage to the front end of the anoxic tank. This return is generally called nitrification liquid return or mixed liquid return.

[0010] 4) Sludge return loop. The sewage that has been treated successively in the anoxic tank and the aerobic tank is finally separated from the sewage and microorganisms in the sedimentation tank. Finally, the sewage is discharged. A pump needs to be set up to return the microorganisms at the bottom of the sedimentation tank to the anoxic tank through the pump (i.e., Figure 1 the fourth water pump in

[0011] ), to ensure the quantity of microorganisms in the tank. This return is generally called sludge return (the dry microbial form looks similar to sludge, and the microbial state of the mixed water is close to water and can flow). Figure 1 ), the fifth water pump in

[0012] In summary, for the flow of liquid in each liquid flow loop, a water pump needs to be set up, not only to utilize the pressure boost of the water pump, but also to accurately control the flow rate. However, this brings a defect: high cost and poor safety.

[0013] From the perspective of cost, the sewage treatment system belongs to key equipment. Therefore, at least two water pumps need to be set up for each water pump, one for working and one for standby. The increasing number of water pumps will lead to continuous increases in equipment installation costs, maintenance costs, and electrical costs, and the process adjustment is complex. When adjusting the return flow of each, it needs to be adjusted at each water pump, increasing the workload of the operating personnel.

[0014] From the perspective of safety, increasing too many water flow pipelines are concentrated at the front end of the anoxic tank, with high potential safety hazards. This will lead to an increase in the construction difficulty of the pipelines, higher requirements for the waterproofing of the tank body, and at the same time increase the construction period of the civil engineering tank body. Utility Model Content

[0015] Based on this, in view of the problems of high cost and poor safety of the traditional sewage treatment system used in the A / O process, it is necessary to provide a sewage treatment system.

[0016] This application provides a sewage treatment system, including:

[0017] A regulating tank, having a regulating tank outlet;

[0018] A mixing tank, the regulating tank outlet is communicated with the mixing tank through a first pipeline;

[0019] A sewage pump group, the inlet side of the sewage pump group is communicated with the mixing tank through a second pipeline;

[0020] An anoxic tank, having an anoxic tank inlet and an anoxic tank outlet; the outlet side of the sewage pump group is communicated with the anoxic tank inlet through a third pipeline;

[0021] An aerobic tank, having an aerobic tank inlet and a first aerobic tank outlet; the aerobic tank inlet is communicated with the anoxic tank outlet;

[0022] A sedimentation tank, having a sedimentation tank inlet and a first sedimentation tank outlet, the sedimentation tank inlet is communicated with the first aerobic tank outlet;

[0023] A drainage pipeline, arranged at the first sedimentation tank outlet and communicated with the first sedimentation tank outlet;

[0024] A chemical dosing tank, communicated with the mixing tank;

[0025] The aerobic tank further includes a second aerobic tank outlet, the second aerobic tank outlet is communicated with the mixing tank; the sedimentation tank further includes a second sedimentation tank outlet, the second sedimentation tank outlet is communicated with the mixing tank; the drainage pipeline is also communicated with the mixing tank.

[0026] Further, the sewage pump group includes:

[0027] A first pump body;

[0028] A second pump body, the first pump body and the second pump body are in parallel.

[0029] Further, the sewage treatment system further includes:

[0030] A fourth pipeline, arranged between the chemical dosing tank and the mixing tank, the chemical dosing tank is communicated with the mixing tank through the fourth pipeline.

[0031] Further, the sewage treatment system further includes:

[0032] A fifth pipeline, arranged between the second aerobic tank outlet and the mixing tank, the second aerobic tank outlet is communicated with the mixing tank through the fifth pipeline.

[0033] Further, the sewage treatment system further includes:

[0034] A sixth pipeline, arranged between the second sedimentation tank outlet and the mixing tank, the second sedimentation tank outlet is communicated with the mixing tank through the sixth pipeline.

[0035] Further, the sewage treatment system further includes:

[0036] A seventh pipeline, arranged between the drainage pipeline and the mixing tank, the drainage pipeline is communicated with the mixing tank through the seventh pipeline.

[0037] Furthermore, a mixing tank outlet is provided at the bottom of the mixing tank, and the inlet side of the sewage pump group is communicated with the mixing tank outlet through a second pipeline.

[0038] Furthermore, a first flow rate regulating device is provided on each of the first pipeline, the fourth pipeline, the fifth pipeline, the sixth pipeline, and the seventh pipeline;

[0039] The first flow rate regulating device includes:

[0040] A first regulating valve;

[0041] A second regulating valve;

[0042] A first flow meter;

[0043] The first regulating valve, the second regulating valve, and the first flow meter are all arranged relatively closer to the mixing tank.

[0044] Furthermore, a second flow rate regulating device is provided on the third pipeline;

[0045] The second flow rate regulating device includes:

[0046] A second flow meter.

[0047] Furthermore, a liquid level gauge and a pressure gauge are also provided on the mixing tank.

[0048] The present application relates to a sewage treatment system. By arranging a mixing tank to complete the liquid collection work of the five core liquid circuits of the influent from the previous process, chemical agent flow, nitrification liquid reflux, sludge reflux, and effluent reflux in the biochemical treatment, the basic circulation of the liquid for biochemical treatment is ensured. Only one sewage pump group is arranged between the mixing tank and the anoxic tank to complete the liquid transportation work of the five core liquid circuits of the influent from the previous process, chemical agent flow, nitrification liquid reflux, sludge reflux, and effluent reflux in the biochemical treatment, without arranging pump groups for each core liquid circuit of the biochemical treatment, reducing the number of equipment consumed by the whole sewage treatment system, effectively reducing the installation cost, maintenance cost, and electrical cost, saving space, and not concentrating too many liquid pipelines at the front end of the anoxic tank, improving the overall safety of the system. Description of the Drawings

[0049] Figure 1 It is a process flow chart of the traditional A / O process.

[0050] Figure 2 It is a schematic structural diagram of the sewage treatment system provided by an embodiment of the present application.

[0051] Figure 3 It is a schematic structural diagram of the sewage treatment system provided by another embodiment of the present application.

[0052] Figure 4 This is a schematic structural diagram of a mixing tank in a sewage treatment system provided by an embodiment of the present application.

[0053] Reference numerals:

[0054] 010 - First water pump; 020 - Second water pump; 030 - Third water pump; 040 - Fourth water pump;

[0055] 050 - Fifth water pump;

[0056] 10 - Regulation tank; 110 - Outlet of the regulation tank; 20 - Mixing tank; 210 - Liquid level gauge; 220 - Pressure gauge;

[0057] 230 - Outlet of the mixing tank;

[0058] 30 - Sewage pump group; 310 - Inlet side; 320 - Outlet side; 330 - First pump body; 340 - Second pump body;

[0059] 40 - Anoxic tank; 410 - Inlet of the anoxic tank; 420 - Outlet of the anoxic tank; 50 - Aerobic tank;

[0060] 510 - Inlet of the aerobic tank; 520 - First outlet of the aerobic tank; 530 - Second outlet of the aerobic tank;

[0061] 60 - Sedimentation tank; 610 - Inlet of the sedimentation tank; 620 - First outlet of the sedimentation tank; 630 - Second outlet of the sedimentation tank;

[0062] 70 - Drainage pipeline; 80 - Chemical dosing tank; 910 - First pipeline; 920 - Second pipeline; 930 - Third pipeline;

[0063] 940 - Fourth pipeline; 950 - Fifth pipeline; 960 - Sixth pipeline; 970 - Seventh pipeline;

[0064] 980 - First flow regulating device; 981 - First regulating valve; 982 - Second regulating valve;

[0065] 983 - First flowmeter; 990 - Second flow regulating device; 991 - Second flowmeter. Detailed implementation manners

[0066] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0067] This application provides a sewage treatment system. It should be noted that the sewage treatment system provided by this application can be applied to any type of work task for sewage treatment using the A / O process.

[0068] Embodiment 1

[0069] As Figure 1 shown, in Embodiment 1 of this application, the sewage treatment system includes an adjustment tank 10, a mixing tank 20, a sewage pump group 30, an anoxic tank 40, an aerobic tank 50, a sedimentation tank 60, a drainage pipeline 70, and a chemical dosing tank 80.

[0070] The adjustment tank 10 has an adjustment tank outlet 110. The adjustment tank outlet 110 is connected to the mixing tank 20 through a first pipeline 910. The inlet side 310 of the sewage pump group 30 is connected to the mixing tank 20 through a second pipeline 920. The anoxic tank 40 has an anoxic tank inlet 410 and an anoxic tank outlet 420. The outlet side 320 of the sewage pump group 30 is connected to the anoxic tank inlet 410 through a third pipeline 930. The aerobic tank 50 has an aerobic tank inlet 510 and an aerobic tank first outlet 520. The aerobic tank inlet 510 is connected to the anoxic tank outlet 420. The sedimentation tank 60 has a sedimentation tank inlet 610 and a sedimentation tank first outlet 620, and the sedimentation tank inlet 610 is connected to the aerobic tank first outlet 520.

[0071] The drainage pipeline 70 is provided at the sedimentation tank first outlet 620. The drainage pipeline 70 is connected to the sedimentation tank first outlet 620. The chemical dosing tank 80 is connected to the mixing tank 20.

[0072] The aerobic tank 50 further includes an aerobic tank second outlet 530. The aerobic tank second outlet 530 is connected to the mixing tank 20. The sedimentation tank 60 further includes a sedimentation tank second outlet 630. The sedimentation tank second outlet 630 is connected to the mixing tank 20. The drainage pipeline 70 is also connected to the mixing tank 20.

[0073] Specifically, the sewage pump group 30 in this embodiment can be a centrifugal pump.

[0074] The working principle of the centrifugal pump commonly used in sewage engineering is to utilize the high-speed rotational motion of the impeller. Water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, creating a negative pressure in the middle, which causes the external water to be pressed into the centrifugal pump by the action of atmospheric pressure. Considering that there is no adverse effect after the various sewage or chemicals entering the anoxic tank 40 are mixed, in this embodiment, the pump groups of each pipeline are simplified and connected in parallel at the water inlet before entering the anoxic tank 40. Only one sewage pump group 30 with a larger flow rate is used to simultaneously complete the liquid transportation work of the five core liquid circuits of the incoming water from the previous process, chemical flow, nitrification liquid reflux, sludge reflux, and effluent reflux in the biochemical treatment, so as to reduce the total number of devices set in the system and lower the maintenance cost. The designed flow rate of the sewage pump group 30 is the sum of the required flow rates of the incoming water circuit from the previous process, chemical flow circuit, nitrification liquid reflux circuit, sludge reflux circuit, and effluent reflux circuit.

[0075] To facilitate mixing and stabilize the pressure, in this embodiment, a mixing tank 20 is connected to the inlet side 310 of the sewage pump group 30, and each pipeline is uniformly connected to the mixing tank 20. When the sewage pump group 30 is started, the negative pressure formed in the mixing tank 20 will suck the incoming water from each pipeline into the mixing tank 20.

[0076] Optionally, the mixing tank 20 can be made of 304 stainless steel or other materials that meet the requirements of pressure and corrosion resistance. The volume of the mixing tank 20 is the volume of the water accumulated after the sewage pump group 30 is started for 5 minutes, so as to prevent the sewage pump group 30 from starting or shutting down frequently when the flow rate does not match other pipelines. For example, if the flow rate of the sewage pump group 30 in the working state is 60 cubic meters per hour, then the volume of the mixing tank 20 is set to 5 cubic meters, that is, 5000 liters.

[0077] In this embodiment, by setting the mixing tank 20 to complete the liquid collection work of the five core liquid circuits of the incoming water from the previous process, chemical flow, nitrification liquid reflux, sludge reflux, and effluent reflux in the biochemical treatment, ensuring the basic circulation of the liquid used in the biochemical treatment. Only one sewage pump group 30 is set between the mixing tank 20 and the anoxic tank 40 to complete the liquid transportation work of the five core liquid circuits of the incoming water from the previous process, chemical flow, nitrification liquid reflux, sludge reflux, and effluent reflux in the biochemical treatment. There is no need to set pump groups for each core liquid circuit in the biochemical treatment, reducing the number of devices consumed by the overall sewage treatment system, effectively reducing the installation cost, maintenance cost, and electrical cost, saving space, and not concentrating too many liquid pipelines at the front end of the anoxic tank 40, improving the overall safety of the system.

[0078] Embodiment 2

[0079] As Figure 3 shown, in Embodiment 2 of the present application, the sewage pump group 30 includes a first pump body 330 and a second pump body 340. The first pump body 330 and the second pump body 340 are connected in parallel.

[0080] Specifically, the first pump body 330 and the second pump body 340 can be two centrifugal pumps with the same parameters and the same brand. The first pump body 330 and the second pump body 340 can be set to one in use and one in reserve, that is, they are not put into actual use at the same time. One of the first pump body 330 and the second pump body 340 serves as the main pump, and the other serves as the standby slave pump. The control of the first pump body 330 and the second pump body 340 adjusts their parameters through the frequency converter of the electrical system.

[0081] In this embodiment, by setting the first pump body 330 and the second pump body 340 with one in use and one in reserve, redundancy is provided for the single sewage pump group 30, avoiding the shutdown of the entire sewage treatment system due to the failure of a certain pump body.

[0082] Embodiment 3

[0083] As Figure 3 shown, in Embodiment 3 of the present application, the sewage treatment system further includes a fourth pipeline 940. The fourth pipeline 940 is arranged between the chemical dosing tank 80 and the mixing tank 20. The chemical dosing tank 80 and the mixing tank 20 are connected through the fourth pipeline 940.

[0084] Specifically, the fourth pipeline 940 corresponds to the chemical agent flow circuit in the five-way core liquid circuit for biochemical treatment. During the biochemical treatment process, some chemical agents may be added, such as nutrient sources, etc. These chemical agents may be used to adjust the sewage quality or enhance the treatment ability of microorganisms. The chemical agents are input into the mixing tank 20 through the fourth pipeline 940.

[0085] In this embodiment, by arranging the fourth pipeline 940 between the chemical dosing tank 80 and the mixing tank 20, the chemical agents can be input into the mixing tank 20 through the fourth pipeline 940. The liquid is collected through the mixing tank 20 as a medium and then input into the anoxic tank 40.

[0086] Embodiment 4

[0087] As Figure 3 shown, in Embodiment 4 of the present application, the sewage treatment system further includes a fifth pipeline 950. The fifth pipeline 950 is arranged between the second outlet 530 of the aerobic tank and the mixing tank 20. The second outlet 530 of the aerobic tank and the mixing tank 20 are connected through the fifth pipeline 950.

[0088] Specifically, the fifth pipeline 950 corresponds to the nitrification liquid reflux circuit in the five-way core liquid circuit for biochemical treatment. The removal of pollutants requires the sewage to circulate reciprocally in anoxic and aerobic environments. By arranging the fifth pipeline 950, the sewage output from the end of the aerobic tank 50 is refluxed to the front end of the anoxic tank 40.

[0089] In this embodiment, by providing a fifth pipeline 950 between the second outlet 530 of the aerobic tank and the mixing tank 20, the sewage output from the end of the aerobic tank 50 can be input into the mixing tank 20 through the fifth pipeline 950. The liquid is collected through the mixing tank 20 as a medium and then returned to the front end of the anoxic tank 40.

[0090] Embodiment 5

[0091] As Figure 3 shown, in Embodiment 5 of the present application, the sewage treatment system further includes a sixth pipeline 960. The sixth pipeline 960 is provided between the second outlet 630 of the sedimentation tank and the mixing tank 20. The second outlet 630 of the sedimentation tank and the mixing tank 20 are connected through the sixth pipeline 960.

[0092] Specifically, the sixth pipeline 960 corresponds to the sludge return loop in the five-way biochemical treatment core liquid loop.

[0093] The sewage that has been treated successively through the anoxic tank 40 and the aerobic tank 50 is finally separated from the sewage and microorganisms in the sedimentation tank 60, and finally the sewage is discharged. By providing the sixth pipeline 960, the microorganisms at the bottom of the sedimentation tank 60 can be returned to the anoxic tank 40 to ensure the number of microorganisms in the tank.

[0094] In this embodiment, by providing a sixth pipeline 960 between the second outlet 630 of the sedimentation tank and the mixing tank 20, the microorganisms at the bottom of the sedimentation tank 60 can be input into the mixing tank 20 through the sixth pipeline 960. The liquid is collected through the mixing tank 20 as a medium and then returned to the anoxic tank 40.

[0095] Embodiment 6

[0096] As Figure 3 shown, in Embodiment 6 of the present application, the sewage treatment system further includes a seventh pipeline 970. The seventh pipeline 970 is provided between the drainage pipeline 70 and the mixing tank 20. The drainage pipeline 70 and the mixing tank 20 are connected through the seventh pipeline 970.

[0097] Specifically, the seventh pipeline 970 corresponds to the effluent return loop in the five-way biochemical treatment core liquid loop.

[0098] When the biochemical treatment effect of the entire sewage treatment system is poor, that is, when the effluent index does not meet the requirements, the effluent from the sedimentation tank 60 can be returned to the anoxic tank 40 through the seventh pipeline 970 via the drainage pipeline 70 for secondary treatment. In addition, when the pollutant concentration of the sewage flowing from the regulating tank 10 to the anoxic tank 40 is too high and exceeds the range that the microorganisms can withstand, the effluent from the sedimentation tank 60 can also be returned to the anoxic tank 40 through the seventh pipeline 970 to dilute the sewage.

[0099] In this embodiment, a seventh pipeline 970 is arranged between the drainage pipeline 70 and the mixing tank 20, so that the effluent from the sedimentation tank 60 can be re-input into the mixing tank 20 via the drainage pipeline 70. The liquid is collected through the mixing tank 20 as a medium and then flows back to the anoxic tank 40.

[0100] Embodiment 7

[0101] As Figure 4 shown, in Embodiment 7 of the present application, a mixing tank outlet 230 is provided at the bottom of the mixing tank 20. The inlet side 310 of the sewage pump group 30 is communicated with the mixing tank outlet 230 through a second pipeline 920.

[0102] There are a total of 6 pipelines connected to the mixing tank 20, namely the first pipeline 910, the second pipeline 920, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960 and the seventh pipeline 970. Optionally, the heights of the connections of these 6 pipelines to the mixing tank 20 relative to the ground can be set differently, which can effectively promote the mixing of liquids from different sources and improve the mixing efficiency of the mixing tank 20. Optionally, the height of the connection of the second pipeline 920 to the mixing tank 20 relative to the ground is set to be the lowest, that is, the position where the mixing tank outlet 230 is opened is at the bottom of the mixing tank 20 and has the lowest height relative to the ground.

[0103] One ends of the first pipeline 910, the second pipeline 920, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960 and the seventh pipeline 970 are all connected to the mixing tank 20, and the connections of the other ends to their respective tank bodies can be installed at different positions according to the liquid flow conditions to achieve the effect of adjusting the pipeline flow rate. For example, the connections of the first pipeline 910 (corresponding to the influent pipeline) and the fifth pipeline 950 (corresponding to the nitrification liquid reflux pipeline) to the tank body are set at the bottom positions of the tank bodies corresponding to the pipelines, the connection of the sixth pipeline 960 (corresponding to the sludge reflux pipeline) to the tank body is set at the bottom of the sedimentation tank 60, the connection of the seventh pipeline 970 (corresponding to the effluent reflux pipeline) to the tank body is set at the drainage pipeline 70 connected to the sedimentation tank 60, and the connection of the fourth pipeline 940 (corresponding to the chemical agent flow circuit) to the tank body is set at the bottom of the chemical agent adding tank 80. The pipe diameters, materials, etc. of the above various pipelines are set according to the design requirements and only need to meet the normal working requirements, which will not be elaborated here.

[0104] In this embodiment, by providing a mixing tank outlet 230 at the bottom of the mixing tank 20, the phenomenon of silt deposition at the bottom of the mixing tank 20 can be prevented.

[0105] Embodiment 8

[0106] As Figure 2As shown in the figure, in Embodiment 8 of the present application, a first flow rate regulating device 980 is provided on each of the first pipeline 910, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960 and the seventh pipeline 970.

[0107] The first flow rate regulating device 980 includes a first regulating valve 981, a second regulating valve 982 and a first flowmeter 983. The first regulating valve 981, the second regulating valve 982 and the first flowmeter 983 are all relatively closer to the mixing tank 20.

[0108] Specifically, in order to facilitate the regulation of the flow rates of each return pipeline, in this embodiment, a first flow rate regulating device 980 is installed on each of the five biochemical treatment core liquid return pipelines of the first pipeline 910, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960 and the seventh pipeline 970. The first flow rate regulating device 980 can achieve real-time regulation of the flow rate and control the flow rate of each pipeline. At the same time, the sewage pump group 30 is controlled by frequency conversion (frequency conversion control is to use electrical equipment to reduce the frequency of the power supply, which can change parameters such as the flow rate of the sewage pump group 30 and is a conventional logic control that does not involve software or computer programs). When the return flow rate is too low, the working frequency of the sewage pump group 30 is reduced to reduce the flow rate, and vice versa, the flow rate can be increased. Therefore, each first flow rate regulating device 980 works in cooperation with the sewage pump group 30 to jointly adjust the flow rates of each pipeline.

[0109] The first regulating valve 981, the second regulating valve 982 and the first flowmeter 983 are all relatively closer to the mixing tank 20 in order to more quickly adjust the liquid flow rate of the first pipeline 910, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960 and the seventh pipeline 970 in the first time.

[0110] The first regulating valve 981 can be a manual regulating valve and can be adjusted manually in terms of opening degree. It should be noted that the opening degree adjustment of the first regulating valve 981 does not need to rely on software or computer programs to achieve.

[0111] The second regulating valve 982 can be an electric regulating valve or a pneumatic regulating valve and other regulating valves with remote regulation and remote opening and closing functions. The second regulating valve 982 can be an electric regulating valve with the brand of Shanghai Juliang Valve Group Co., Ltd. and the model of JL900-D1. It should be noted that the second regulating valve 982 only realizes the opening degree adjustment through the existing simple control logic, and its opening degree adjustment does not need to rely on software or computer programs to achieve.

[0112] The first flowmeter 983 can be an electromagnetic flowmeter or a rotameter, etc., which can meet the requirements of measurement and remote data transmission. It should be noted that the first flowmeter 983 does not perform data processing, only data acquisition and data transmission. Its flow measurement function does not need to rely on software or computer programs to achieve, and can be achieved only through hardware settings.

[0113] In this embodiment, by installing a first flow regulating device 980 on each of the five biochemical treatment core liquid return lines of the first pipeline 910, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960, and the seventh pipeline 970, it is possible to realize the cooperation of a flow regulating device and the sewage pump group 30 to adjust the flow rates of the respective pipelines in the first pipeline 910, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960, and the seventh pipeline 970.

[0114] Embodiment 9

[0115] As Figure 2 and Figure 3 shown, in Embodiment 9 of the present application, a second flow regulating device 990 is provided on the third pipeline 930.

[0116] The second flow regulating device 990 includes a second flowmeter 991.

[0117] Specifically, the second flowmeter 991 can be an electromagnetic flowmeter or a rotameter, etc., which can meet the requirements of measurement and remote data transmission. It should be noted that the second flowmeter 991 does not perform data processing, only data acquisition and data transmission. Its flow measurement function does not need to rely on software or computer programs to achieve, and can be achieved only through hardware settings.

[0118] The third pipeline 930 is the outlet pipeline of the sewage pump group 30. In addition to the second flowmeter 991, pressure gauges, valves, flexible connection devices, etc. can also be installed according to conventional requirements. To simplify the description content of the present application, Figures 1 to 4 these devices are not drawn, and only the second flowmeter 991 is drawn.

[0119] In addition, the second pipeline 920 is the inlet pipeline of the sewage pump group 30. Pressure gauges, valves, flexible connection devices, and flowmeters, etc. can also be installed according to conventional requirements. To simplify the description content of the present application, Figures 1 to 4 these devices are not drawn.

[0120] In this embodiment, by installing a second flow regulating device 990 on each of the third pipelines 930, it is possible to cooperate with the first pipeline 910, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960, and the seventh pipeline 970 through the second flow regulating device 990 to set the first flow regulating device 980 to mutually cooperate to regulate the flow rates of the respective pipelines in the first pipeline 910, the fourth pipeline 940, the fifth pipeline 950, the sixth pipeline 960, and the seventh pipeline 970.

[0121] Embodiment 10

[0122] As Figure 4 shown, in Embodiment 10 of the present application, the mixing tank 20 is further provided with a liquid level gauge 210 and a pressure gauge 220.

[0123] Specifically, when the entire sewage treatment system is powered on and started for the first time, tap water is filled in the mixing tank 20. After the sewage treatment system is in a working state, the sewage pump group 30 is started. The sewage pump group 30 is a centrifugal pump. After it is started, the inside of the mixing tank 20 can be in a negative pressure state, and the liquid in each pool body enters the mixing tank 20 through each pipeline under the action of atmospheric pressure. The negative pressure in the mixing tank 20 varies according to the sewage pump group 30 with different parameters, and the pressure range in the mixing tank 20 is within a numerical range greater than -100 kPa and less than -10 kPa. According to the opening degree adjustment of the first regulating valve 981 or the second regulating valve 982 of the first flow regulating device 980 on each pipeline, ensure that the flow rate of each pipeline meets the process requirements. After the liquid is mixed in the mixing tank 20, it is pressurized and enters the anoxic tank 40 under the action of the sewage pump group 30 to start biochemical treatment.

[0124] In this embodiment, by providing a liquid level gauge 210 and a pressure gauge 220 in the mixing tank 20, the liquid level and air pressure in the mixing tank 20 can be monitored in real time.

[0125] The technical features of the above-described embodiments can be combined arbitrarily, and there is no limitation on the execution order of the method steps. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0126] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A sewage treatment system, characterized in that, The described sewage treatment system includes: A regulating tank (10) having a regulating tank outlet (110); A mixing tank (20), with the regulating tank outlet (110) communicating with the mixing tank (20) through a first pipeline (910); A sewage pump group (30), with the inlet side (310) of the sewage pump group (30) communicating with the mixing tank (20) through a second pipeline (920); An anoxic tank (40) having an anoxic tank inlet (410) and an anoxic tank outlet (420); the outlet side (320) of the sewage pump group (30) communicates with the anoxic tank inlet (410) through a third pipeline (930); An aerobic tank (50) having an aerobic tank inlet (510) and a first aerobic tank outlet (520); the aerobic tank inlet (510) communicates with the anoxic tank outlet (420); A sedimentation tank (60) having a sedimentation tank inlet (610) and a first sedimentation tank outlet (620), with the sedimentation tank inlet (610) communicating with the first aerobic tank outlet (520); A drainage pipeline (70) provided at the first sedimentation tank outlet (620) and communicating with the first sedimentation tank outlet (620); A chemical dosing tank (80) communicating with the mixing tank (20); The aerobic tank (50) further includes a second aerobic tank outlet (530), which communicates with the mixing tank (20); the sedimentation tank (60) further includes a second sedimentation tank outlet (630), which communicates with the mixing tank (20); the drainage pipeline (70) also communicates with the mixing tank (20).

2. The sewage treatment system according to claim 1, wherein The sewage pump group (30) includes: A first pump body (330); A second pump body (340), with the first pump body (330) and the second pump body (340) in parallel.

3. The sewage treatment system according to claim 2, wherein The sewage treatment system further includes: A fourth pipeline (940) provided between the chemical dosing tank (80) and the mixing tank (20), with the chemical dosing tank (80) communicating with the mixing tank (20) through the fourth pipeline (940).

4. The sewage treatment system according to claim 3, characterized in that, The sewage treatment system further includes: A fifth pipeline (950) provided between the second aerobic tank outlet (530) and the mixing tank (20), with the second aerobic tank outlet (530) communicating with the mixing tank (20) through the fifth pipeline (950).

5. The sewage treatment system according to claim 4, characterized in that, The sewage treatment system further includes: A sixth pipeline (960) provided between the second sedimentation tank outlet (630) and the mixing tank (20), with the second sedimentation tank outlet (630) communicating with the mixing tank (20) through the sixth pipeline (960).

6. The sewage treatment system according to claim 5, characterized in that, The sewage treatment system further includes: A seventh pipeline (970) provided between the drainage pipeline (70) and the mixing tank (20), with the drainage pipeline (70) communicating with the mixing tank (20) through the seventh pipeline (970).

7. The sewage treatment system according to claim 6, characterized in that, The bottom of the mixing tank (20) is provided with a mixing tank outlet (230), and the inlet side (310) of the sewage pump group (30) communicates with the mixing tank outlet (230) through the second pipeline (920).

8. The sewage treatment system according to claim 7, characterized in that, A first flow regulating device (980) is respectively arranged on each of the first pipeline (910), the fourth pipeline (940), the fifth pipeline (950), the sixth pipeline (960) and the seventh pipeline (970); The first flow regulating device (980) includes: A first regulating valve (981); A second regulating valve (982); A first flowmeter (983); The first regulating valve (981), the second regulating valve (982) and the first flowmeter (983) are all arranged relatively closer to the mixing tank (20).

9. The sewage treatment system according to claim 8, wherein, A second flow regulating device (990) is arranged on the third pipeline (930); The second flow regulating device (990) includes: A second flowmeter (991).

10. The sewage treatment system according to claim 8 or 9, characterized in that, The mixing tank (20) is further provided with a liquid level gauge (210) and a pressure gauge (220).

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