Phosphorus-containing wastewater purification system and method

Abstract

This application relates to the field of wastewater treatment technology, specifically to a phosphorus-containing wastewater purification system and method, comprising a main reaction module and a pre-sampling purification module. The main reaction module includes an initial wastewater unit, and the pre-sampling purification module is connected to the initial wastewater unit. The pre-sampling purification module is used to sample from the initial wastewater unit and purify the sample to select the purification path of the main reaction module based on the purification result. The purpose of this application is to address at least one technical problem involved in the prior art by providing a phosphorus-containing wastewater purification system and method.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and more specifically, to a phosphorus-containing wastewater purification system and a phosphorus-containing wastewater purification method. Background Technology

[0002] Phosphorus-containing wastewater is a major pollutant in wastewater. Total phosphorus (TP) in wastewater mainly includes dissolved phosphorus (STP) and insoluble phosphorus. Chemically, total phosphorus in wastewater can be divided into organic and inorganic phosphorus. Based on the difficulty of degradation and removal, total phosphorus in wastewater can be categorized into easily removable and difficult-to-remove types. Easily removable phosphorus mainly refers to phosphates that are easily (or biodegradable), easily removed by chemical coagulation and precipitation, or easily removed by fine filtration. Easily removable phosphorus mainly refers to orthophosphates, represented by the letters "PO". PO4 3- Phosphorus has a +5 valence. The difficult-to-remove category mainly refers to phosphorus pollutants that are difficult to biodegrade, difficult to chemically coagulate and precipitate, or difficult to remove by fine filtration. The difficult-to-remove category mainly refers to condensed phosphates of pyrophosphate / metaphophosphate / polyphosphate, or organically bound phosphorus, etc., collectively referred to as non-orthophosphates, characterized by the "TP to PO difference", such as complex phosphorus-oxygen bonds or carbon-phosphorus bonds in functional groups or organic or inorganic phosphorus in valence.

[0003] If phosphorus in water pollutants fails to be efficiently degraded and meet minimum emission standards through purification and treatment facilities, it may cause the total phosphorus in the effluent of centralized sewage treatment facilities to fail to meet emission standards, leading to the risk of environmental over-emission. Moreover, after being discharged into the aquatic environment, some water bodies do not have the capacity for self-purification and absorption, which may cause environmental pollution and, in severe cases, lead to eutrophication (algal blooms, etc.) and other aquatic ecological imbalances.

[0004] Existing methods for purifying and degrading phosphorus-containing wastewater generally employ biological phosphorus removal (anaerobic phosphorus release, aerobic phosphorus uptake), or supplemented by chemical coagulation and precipitation (addition of metal salt phosphorus removal agents such as iron or aluminum salts) and fine filtration. However, these methods are insufficient to specifically degrade complex functional chains or valence states of phosphorus-containing organic or inorganic phosphorus in wastewater containing phosphorus with phosphorus-oxygen or carbon-phosphorus bonds. Furthermore, existing purification facilities require significant costs and have low purification efficiency to achieve total phosphorus discharge standards in their effluent. Under cost constraints, it is difficult to ensure that the facilities achieve these standards. Summary of the Invention

[0005] The purpose of this application is to provide a phosphorus-containing wastewater purification system and a phosphorus-containing wastewater purification method to address at least one of the technical problems involved in the background art.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] One aspect of this application provides a phosphorus-containing wastewater purification system, including a main reaction module and a pre-sampling purification module. The main reaction module includes an initial wastewater unit, and the pre-sampling purification module is connected to the initial wastewater unit. The pre-sampling purification module is used to sample from the initial wastewater unit and purify the sample to select the purification path of the main reaction module based on the purification result.

[0008] Optionally, the pre-sampling and purification module includes a sampling and purification device, a pre-filtration device, and a detection unit connected sequentially from upstream to downstream. The detection unit includes a first total phosphorus detector and a phosphate detector connected in parallel.

[0009] The sampling and purification device includes a phosphorus oxidizer, a phosphorus trap, a phosphorus flocculant, and a phosphorus filter stacked sequentially from top to bottom. The inlets of the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculant, and the phosphorus filter are connected in parallel to the initial wastewater unit. The outlets of the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculant, and the phosphorus filter are connected in parallel to the detection unit. Each inlet is equipped with an inlet valve, and each outlet is equipped with an outlet valve.

[0010] Optionally, the sampling and purification device further includes an internal connecting pipeline assembly, through which the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculator, and the phosphorus filter are connected, thereby forming a first sampling and purification path, a second sampling and purification path, a third sampling and purification path, a fourth sampling and purification path, a fifth sampling and purification path, a sixth sampling and purification path, and a seventh sampling and purification path that can be selectively connected in the pre-sampling and purification module.

[0011] The first sampling and purification pathway includes the phosphorus flocculant, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream.

[0012] The second sampling and purification pathway includes the phosphorus trap, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream.

[0013] The third sampling and purification pathway includes the phosphorus oxidizer, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream.

[0014] The fourth sampling and purification pathway includes the phosphorus trap, the phosphorus flocculant, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream.

[0015] The fifth sampling and purification pathway includes the phosphorus oxidizer, the phosphorus flocculation device, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream.

[0016] The sixth sampling and purification pathway includes, in sequence from upstream to downstream, the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculator, the pre-filter, and the detection unit.

[0017] The seventh sampling and purification pathway is connected sequentially from upstream to downstream to the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculator, the phosphorus filter, the pre-filter, and the detection unit.

[0018] Optionally, the sampling and purification device further includes an outlet pipeline assembly, which includes a main outlet pipeline and a first liquid storage unit, a second liquid storage unit, a third liquid storage unit, and a fourth liquid storage unit connected in parallel to the main outlet pipeline. The first liquid storage unit, the second liquid storage unit, the third liquid storage unit, and the fourth liquid storage unit are respectively used to collect liquids flowing out from the outlet of the phosphorus oxidizer, the outlet of the phosphorus trap, the outlet of the phosphorus flocculant, and the outlet of the phosphorus filter. The main outlet pipeline is connected to the pre-filter for water samples.

[0019] Optionally, the sampling and purification device further includes an inlet pipeline assembly, which includes a main sampling and purification inlet pipeline, and a first sampling and purification inlet pipeline, a second sampling and purification inlet pipeline, a third sampling and purification inlet pipeline, and a fourth sampling and purification inlet pipeline, all of which are connected to the main sampling and purification inlet pipeline. A first sampling and purification inlet valve is installed on the first sampling and purification inlet pipeline, a second sampling and purification inlet valve is installed on the second sampling and purification inlet pipeline, a third sampling and purification inlet valve is installed on the third sampling and purification inlet pipeline, and a fourth sampling and purification inlet valve is installed on the fourth sampling and purification inlet pipeline.

[0020] The water outlet pipeline assembly further includes a first water outlet pipeline equipped with a first water outlet valve, a second water outlet pipeline equipped with a second water outlet valve, a third water outlet pipeline equipped with a third water outlet valve, and a fourth water outlet pipeline equipped with a fourth water outlet valve.

[0021] The first water outlet pipe is connected to the first liquid storage device, the second water outlet pipe is connected to the second liquid storage device, the third water outlet pipe is connected to the third liquid storage device, and the fourth water outlet pipe is connected to the fourth liquid storage device.

[0022] The first inlet and first outlet water pipes of the sampling and purification system are both connected to the phosphorus oxidizer; the second inlet and second outlet water pipes of the sampling and purification system are both connected to the phosphorus trap; the third inlet and third outlet water pipes of the sampling and purification system are both connected to the phosphorus flocculant; the fourth inlet and fourth outlet water pipes of the sampling and purification system are both connected to the phosphorus filter; the main inlet water pipe of the sampling and purification system is connected to the initial wastewater unit; and the pre-filter is connected to the main outlet water pipe.

[0023] The internal connecting pipeline assembly includes a main internal connecting pipeline, a first internal connecting pipeline with a first connecting valve, a second internal connecting pipeline with a second connecting valve, and a third internal connecting pipeline with a third connecting valve.

[0024] The internal connecting pipes of the first device, the internal connecting pipes of the second device, and the internal connecting pipes of the third device are all connected to the internal connecting pipe of the main device. The internal connecting pipe of the first device is connected to the phosphorus trap, the internal connecting pipe of the second device is connected to the phosphorus flocculator, and the internal connecting pipe of the third device is connected to the phosphorus filter.

[0025] The first water outlet pipe, the second water outlet pipe, and the third water outlet pipe are all connected to the internal connecting pipe of the main device, and the first water outlet pipe, the internal connecting pipe of the first device, the second water outlet pipe, the internal connecting pipe of the second device, the third water outlet pipe, and the internal connecting pipe of the third device are arranged in sequence from upstream to downstream of the internal connecting pipe of the main device.

[0026] A fourth connecting valve and a fifth connecting valve are also installed on the connecting pipeline inside the main device. The fourth connecting valve is located between the connecting pipeline inside the first device and the second water outlet pipeline, and the fifth connecting valve is located between the connecting pipeline inside the second device and the third water outlet pipeline.

[0027] A fifth outlet valve is also installed on the first outlet pipe, located downstream of the first outlet valve. The connection point between the main device's internal connecting pipe and the first outlet pipe is located between the first outlet valve and the fifth outlet valve. A sixth outlet valve is also installed on the second outlet pipe, located downstream of the second outlet valve. The connection point between the main device's internal connecting pipe and the second outlet pipe is located between the second outlet valve and the sixth outlet valve. A seventh outlet valve is also installed on the third outlet pipe, located downstream of the third outlet valve. The connection point between the main device's internal connecting pipe and the third outlet pipe is located between the third outlet valve and the seventh outlet valve.

[0028] Optionally, the pre-sampling and purification module further includes a first sampling pump, a first sampling pipeline, a second sampling pipeline, and a third sampling pipeline.

[0029] The liquid inlet end of the first sampling pump is connected to the initial sewage unit.

[0030] The liquid inlet ends of the first sampling pipeline and the second sampling pipeline are connected in parallel to the liquid outlet end of the first sampling pump, and the liquid outlet ends of the first sampling pipeline and the second sampling pipeline are connected in parallel to the liquid inlet end of the detection unit.

[0031] A first sampling valve is installed on the first sampling pipeline.

[0032] A second sampling valve, the pre-filter, and a third sampling valve are installed sequentially from upstream to downstream on the second sampling pipeline.

[0033] A fourth sampling valve, the sampling and purification device, a second sampling pump, and a fifth sampling valve are installed sequentially from upstream to downstream on the third sampling pipeline. The liquid inlet end of the third sampling pipeline is connected to the outlet end of the first sampling pump, and the liquid outlet end of the third sampling pipeline is connected to the second sampling pipeline. The liquid outlet end of the third sampling pipeline is located between the second sampling valve and the pre-filter.

[0034] Optionally, the main reaction module further includes an internal connecting pipeline assembly, and a phosphorus oxidation unit, a phosphorus adsorption unit, a phosphorus flocculation unit, a phosphorus filtration unit, and a tail-end clean water storage unit arranged sequentially from upstream to downstream, wherein the initial wastewater unit is located upstream of the phosphorus oxidation unit.

[0035] The initial wastewater unit, the phosphorus oxidation unit, the phosphorus adsorption unit, the phosphorus flocculation unit, the phosphorus filtration unit, and the final purified water storage unit are connected via the internal pipeline assembly, enabling the formation of selectively connected first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth main purification pathways within the main reaction module.

[0036] The first main purification pathway includes the initial wastewater unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream.

[0037] The second main purification pathway includes the initial wastewater unit, the phosphorus capture unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream.

[0038] The third main purification pathway includes the initial wastewater unit, the phosphorus oxidation unit, and the final clean water storage unit, which are connected sequentially from upstream to downstream.

[0039] The fourth main purification pathway includes the initial wastewater unit, the phosphorus adsorption unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream.

[0040] The fifth main purification pathway includes the initial wastewater unit, the phosphorus oxidation unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream.

[0041] The sixth main purification pathway includes the initial wastewater unit, the phosphorus oxidation unit, the phosphorus adsorption unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream.

[0042] The seventh main purification pathway includes, sequentially connected from upstream to downstream, the initial wastewater unit, the phosphorus oxidation unit, the phosphorus adsorption unit, the phosphorus flocculation unit, the phosphorus filtration unit, and the tail-end clean water storage unit.

[0043] The eighth main purification pathway includes the initial wastewater unit, the phosphorus filtration unit, and the final clean water storage unit, which are connected sequentially from upstream to downstream.

[0044] The ninth main purification pathway includes the initial sewage unit, the phosphorus flocculation unit, the phosphorus filtration unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream.

[0045] Optionally, the phosphorus-containing wastewater purification system provided in this application further includes a suspended solids detector and a tail-end detection module, wherein the tail-end detection module includes a third sampling pump, a fourth sampling pipeline, a fifth sampling pipeline, and a second total phosphorus detector.

[0046] The liquid inlet of the third sampling pump is connected to the tail-end clear water storage unit, and the suspended solids detector is installed in the tail-end clear water storage unit.

[0047] The liquid inlet ends of the fourth and fifth sampling lines are connected in parallel to the liquid outlet end of the third sampling pump.

[0048] The liquid outlet ends of the fourth and fifth sampling lines are connected in parallel to the second total phosphorus analyzer.

[0049] A sixth sampling valve, a tail-end pre-filter, and a seventh sampling valve are installed sequentially from upstream to downstream on the fourth sampling pipeline.

[0050] An eighth sampling valve is installed in the fifth sampling pipeline.

[0051] Another aspect of this application provides a method for purifying phosphorus-containing wastewater, implemented using the phosphorus-containing wastewater purification system provided in this application, the method comprising:

[0052] The pre-sampling and purification module is controlled to sample the target wastewater from the initial wastewater unit before the main reaction module purifies the target wastewater to obtain the corresponding wastewater sample.

[0053] Based on the pre-sampling and purification module, the wastewater sample is subjected to preset treatment to obtain the corresponding purification test result. It is determined whether the purification test result meets the preset purification conditions. If so, at least one processing unit corresponding to the purification test result is selected in the main reaction module to purify the target wastewater.

[0054] The processing unit includes: a phosphorus oxidation unit, a phosphorus adsorption unit, a phosphorus flocculation unit, a phosphorus filtration unit, and a tail-end clean water storage unit.

[0055] Optionally, the pre-sampling purification module can form a first sampling purification path, a second sampling purification path, a third sampling purification path, a fourth sampling purification path, a fifth sampling purification path, a sixth sampling purification path, and a seventh sampling purification path that are selectively connected.

[0056] The pre-sampling and purification module can also form an eighth sampling and purification path and a ninth sampling and purification path. The eighth sampling and purification path includes a first sampling pump, a second sampling valve, a pre-filter, a third sampling valve, and a detection unit connected sequentially from upstream to downstream. The ninth sampling and purification path includes a first sampling pump, a first sampling valve, and the detection unit.

[0057] The tail end clean water storage unit is also equipped with a suspended solids detector, and the tail end clean water storage unit is connected to the tail end detection module.

[0058] Correspondingly, the step of performing pre-processing on the wastewater sample based on the pre-sampling and purification module to obtain corresponding purification test results, and determining whether the purification test results meet the preset purification conditions, includes:

[0059] The wastewater sample's current total phosphorus concentration and phosphate concentration are detected using the ninth sampling purification pathway, and the difference between the total phosphorus concentration and the phosphate concentration is used as the current first purification detection result; alternatively, the wastewater sample's current total phosphorus concentration is detected using the eighth sampling purification pathway, and then the wastewater sample undergoes pre-filtration treatment, and the pre-filtered wastewater sample's total phosphorus concentration is detected, with the difference between the pre-filtered total phosphorus concentration and the pre-filtered total phosphorus concentration used as the current first purification detection result.

[0060] Determine whether the first purification detection result is less than or equal to a preset phosphorus concentration threshold;

[0061] If the first purification detection result is determined to be less than or equal to the phosphorus concentration threshold, then at least one processing unit corresponding to the first purification detection result is selected in the main reaction module and activated to purify the target wastewater, and the corresponding purification effect detection data is obtained based on the suspended solids detector and the tail end detection module.

[0062] If the first purification detection result is determined to be greater than the phosphorus concentration threshold, then one of the following sampling purification pathways—the first, second, third, fourth, fifth, sixth, and seventh—is sequentially selected and connected to form the current target purification pathway. A preset simulated purification detection and judgment step is then performed on this target purification pathway. This simulated purification detection and judgment step includes: performing simulated purification treatment on the wastewater sample based on the target purification pathway; pre-filtering the wastewater sample after simulated purification treatment and detecting the pre-filtered total phosphorus concentration and the pre-filtered phosphate concentration; using the difference between the pre-filtered total phosphorus concentration and the pre-filtered phosphate concentration as the current second purification detection result; and determining whether the current second purification detection result is less than or equal to the phosphorus concentration threshold.

[0063] If it is determined that the current second purification detection result is less than or equal to the phosphorus concentration threshold, the simulated purification detection step is stopped for the subsequent pathways of the target purification pathway. At least one processing unit corresponding to the current second purification detection result is selected in the main reaction module and turned on to purify the target wastewater. The corresponding purification effect detection data is obtained based on the suspended solids detector and the tail end detection module.

[0064] If it is determined that the current second purification detection result is greater than the phosphorus concentration threshold, then a new target purification pathway is reconnected, and the simulated purification detection and judgment steps are returned for the new target purification pathway.

[0065] If the simulated purification detection and judgment steps have been performed for the first, second, third, fourth, fifth, sixth, and seventh sampling purification pathways, and no second purification detection result less than or equal to the phosphorus concentration threshold has been obtained, then a prompt message is sent to the control system to prompt for a total phosphorus source investigation of the target wastewater.

[0066] The technical solution provided in this application can achieve the following beneficial effects:

[0067] The phosphorus-containing wastewater purification system and method provided in this application can select the ideal purification path of the wastewater in the main reaction module based on the purification results obtained in the pre-sampling purification module under different conditions. On the one hand, it can ensure that the total phosphorus in the effluent of the phosphorus-containing wastewater purification system meets the discharge standards. On the other hand, it can also appropriately optimize the treatment route during operation, avoid redundancy in the reaction treatment path, reduce treatment costs, and improve purification efficiency.

[0068] The additional technical features and advantages of this application will become more apparent from the following description or from practical application. Attached Figure Description

[0069] To more clearly illustrate the technical solutions of the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0070] Figure 1 A schematic diagram of one embodiment of the phosphorus-containing wastewater purification system provided in this application;

[0071] Figure 2 This is a schematic diagram of one embodiment of the sampling and purification device provided in this application. Figure 1 and Figure 2 The arrows in the text indicate the direction of liquid flow;

[0072] Figure 3 A schematic flowchart illustrating one embodiment of the phosphorus-containing wastewater purification method provided in this application.

[0073] Figure 4This is a schematic diagram illustrating the execution logic of one embodiment of the phosphorus-containing wastewater purification method provided in this application.

[0074] Figure label:

[0075] 1-Main reaction module; 3-Sampling and purification device; 11-Initial wastewater unit; 12-Phosphorus oxidation unit; 13-Phosphorus capture unit; 14-Phosphorus flocculation unit; 15-Phosphorus filtration unit; 16-Tail-end clean water storage unit; 21-Pre-sampling and purification module; 22-Tail-end detection module; 211-First sampling pump; 212-First total phosphorus detector; 213-Phosphorus detector; 214-Pre-filtration device; 221-Third sampling pump; 222-Second total phosphorus detector; 223-Tail-end pre-filtration device; 3-Sampling and purification device; 31-Second sampling pump; 321-Phosphorus oxidizer; 322-Phosphorus capture device; 323-Phosphorus flocculation device; 324-Phosphorus filter; 16a-Suspended solids detector; 325a-First... 325b - Second liquid storage unit; 325c - Third liquid storage unit; 325d - Fourth liquid storage unit; 325e - Pipeline lubrication and cleaning solution component; a1 - First sampling valve; a2 - Second sampling valve; a3 - Third sampling valve; a4 - First connecting valve; a5 - Second connecting valve; b1 - Fourth sampling valve; b2 - Fifth sampling valve; c1 - Eighth sampling valve; c2 - Sixth sampling valve; c3 - Seventh sampling valve; g2 - Main pipeline; g9 - Main outlet pipe; g11 - First sampling pipeline; g12 - Second sampling pipeline; g16 - Sampling and purification main inlet pipeline; g18 - Third sampling pipeline; g71 - Fifth sampling pipeline; g72 - Fourth sampling pipeline; g211 - First connecting branch; g3 11-Second connecting branch; g411-Third connecting branch; g511-Fourth connecting branch; g611-Fifth connecting branch; g811-Sampling and purification first inlet pipe; g812-Sampling and purification second inlet pipe; g813-Sampling and purification third inlet pipe; g814-Sampling and purification fourth inlet pipe; g821-First outlet pipe; g822-Second outlet pipe; g823-Third outlet pipe; g824-Fourth outlet pipe; g825-Internal connecting pipe of the main unit; g911-First collection pipe; g912-Second collection pipe; g913-Third collection pipe; g914-Fourth collection pipe; g915-Cleaning pipe; s11-Sampling and purification first inlet valve; s12-Sampling... S13 - Sampling and purification second inlet valve; S14 - Sampling and purification fourth inlet valve; S21 - First outlet valve; S22 - Second outlet valve; S23 - Third outlet valve; S24 - Fourth outlet valve; S31 - First collection valve; S32 - Second collection valve; S33 - Third collection valve; S34 - Fourth collection valve; S35 - Cleaning valve; S211 - Fifth outlet valve; S212 - Fourth connecting valve; S221 - Sixth outlet valve; S222 - Fifth connecting valve; S231 - Seventh outlet valve; S21a - First connecting valve; S22a - Second connecting valve; S23a - Third connecting valve; V1 - First main valve; V2 - Third main valve; V3 - Fifth main valve; V4 - Seventh main valve;v5 - Ninth main valve; v11 - Second main valve; v12 - First trunk valve; v21 - Fourth main valve; v22 - Second trunk valve; v31 - Sixth main valve; v32 - Third trunk valve; v41 - Eighth main valve; v42 - Fourth trunk valve; v51 - Tenth main valve. Detailed Implementation

[0076] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0077] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0078] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0079] like Figure 1 and Figure 2 As shown, one aspect of this application provides a phosphorus-containing wastewater purification system, including a main reaction module 1 and a pre-sampling purification module 21. The main reaction module 1 includes an initial wastewater unit 11, and the pre-sampling purification module 21 is connected to the initial wastewater unit 11. The pre-sampling purification module 21 is used to sample from the initial wastewater unit 11 and purify the sample to select the purification path of the main reaction module 1 according to the purification result.

[0080] The phosphorus-containing wastewater purification system provided in this application embodiment first takes a sample from the initial wastewater unit 11 through the pre-sampling purification module 21, and then performs purification by simulating various modes in the main reaction module 1 in the pre-sampling purification module 21. The staff or control system can select the ideal purification path in the main reaction module 1 according to the purification results.

[0081] The phosphorus-containing wastewater purification system provided in this application can select the ideal purification path for the wastewater in the main reaction module 1 based on the purification results obtained in the pre-sampling purification module 21 under different conditions. On the one hand, it can ensure that the total phosphorus in the effluent of the phosphorus-containing wastewater purification system meets the discharge standards. On the other hand, it can also optimize the treatment route during operation, avoid redundancy in the reaction treatment path, appropriately reduce treatment costs, and improve purification efficiency.

[0082] Optionally, the pre-sampling and purification module 21 includes a sampling and purification device 3, a pre-filtering device 214, and a detection unit connected sequentially from upstream to downstream. The detection unit includes a first total phosphorus detector 212 and a phosphate detector 213 connected in parallel. Preferably, the passage formed by the first connecting valve a4 and the first total phosphorus detector 212 in series is connected in parallel with the passage formed by the second connecting valve a5 and the phosphate detector 213 in series.

[0083] The sampling and purification device 3 includes a phosphorus oxidizer 321, a phosphorus trap 322, a phosphorus flocculant 323, and a phosphorus filter 324 stacked sequentially from top to bottom. The inlets of the phosphorus oxidizer 321, the phosphorus trap 322, the phosphorus flocculant 323, and the phosphorus filter 324 are connected in parallel to the initial wastewater unit 11. The outlets of the phosphorus oxidizer 321, the phosphorus trap 322, the phosphorus flocculant 323, and the phosphorus filter 324 are connected in parallel to the detection unit. Each inlet is equipped with an inlet valve, and each outlet is equipped with an outlet valve.

[0084] The phosphorus oxidizer 321, phosphorus trap 322, phosphorus flocculator 323, and phosphorus filter 324 are stacked sequentially from top to bottom, allowing the liquid to flow downwards under gravity, thus preventing the liquid in the lower container from flowing back into the upper container. The main reaction module 1 may include one or more of the phosphorus oxidation unit 12, phosphorus trapping unit 13, phosphorus flocculation unit 14, and phosphorus filter unit 15. The sampling and purification device 3 can select the appropriate path for sample purification according to the specific structure in the main reaction module 1, which makes the sampling and purification device 3 widely applicable. Preferably, in the phosphorus-containing wastewater purification system provided in this application embodiment, the sampling and purification device 3 is a detachable structure, which allows the sampling and purification device 3 to be applied to other types of phosphorus-containing wastewater purification systems.

[0085] The sampling and purification device provided in this application embodiment can sample micro-simulate the operating conditions and parameter conditions of the main reaction module 1, and carry out dynamic continuous or static intermittent micro-reaction purification processes. The sampling and purification device can simulate the purification scale (simulated reaction volume) according to the corresponding scale of the main reaction module (e.g., a scale of 1:500000 to 1:10000) to realize single or multi-effect combined reaction functions such as phosphorus catalytic oxidation, phosphorus adsorption and capture, phosphorus flocculation and precipitation, and phosphorus filtration purification of the sample. When simulating the catalytic oxidation, adsorption and capture, flocculation and precipitation, and filtration purification in the main reaction module 1 in individual batches, in pairs, or in more than three series reactions, it corresponds to single-stage micro-reaction, dual micro-reaction (in pairs), and multi-coupled micro-reaction (more than three series reactions), respectively. That is, it corresponds to selecting one, two, or three of the phosphorus oxidizer 321, phosphorus trap 322, phosphorus flocculator 323, and phosphorus filter 324 in series.

[0086] The first total phosphorus detector 212 can be used to detect the total phosphorus pollutant concentration of the wastewater sample after it has been purified by the sampling and purification device 3. The phosphate detector 213 can be used to detect the phosphate concentration of the wastewater sample after it has been purified by the sampling and purification device 3, thereby determining whether the emission standards can be met in a certain purification path of the simulated main reaction module 1. Of course, in some special cases, only the first total phosphorus detector 212 or the phosphate detector 213 can be set up; the phosphorus oxidizer 321, phosphorus trap 322, phosphorus flocculator 323 and phosphorus filter 324 can also be arranged horizontally.

[0087] Optionally, the sampling and purification device 3 further includes an internal connecting pipeline assembly. The phosphorus oxidizer 321, the phosphorus trap 322, the phosphorus flocculator 323, and the phosphorus filter 324 are connected through the internal connecting pipeline assembly, so that a first sampling and purification path, a second sampling and purification path, a third sampling and purification path, a fourth sampling and purification path, a fifth sampling and purification path, a sixth sampling and purification path, and a seventh sampling and purification path can be selectively connected in the pre-sampling and purification module 21.

[0088] The first sampling and purification pathway includes the phosphorus flocculant 323, the pre-filter 214, and the detection unit, which are connected sequentially from upstream to downstream.

[0089] The second sampling and purification pathway includes the phosphorus trap 322, the pre-filter 214, and the detection unit, which are connected sequentially from upstream to downstream.

[0090] The third sampling and purification pathway includes the phosphorus oxidizer 321, the pre-filter 214, and the detection unit, which are connected sequentially from upstream to downstream.

[0091] The fourth sampling and purification pathway includes the phosphorus trap 322, the phosphorus flocculant 323, the pre-filter 214, and the detection unit, which are connected sequentially from upstream to downstream.

[0092] The fifth sampling and purification pathway includes the phosphorus oxidizer 321, the phosphorus flocculator 323, the pre-filter 214, and the detection unit, which are connected sequentially from upstream to downstream.

[0093] The sixth sampling and purification pathway includes, from upstream to downstream, the phosphorus oxidizer 321, the phosphorus trap 322, the phosphorus flocculator 323, the pre-filter 214, and the detection unit.

[0094] The seventh sampling and purification pathway is connected sequentially from upstream to downstream to the phosphorus oxidizer 321, the phosphorus trap 322, the phosphorus flocculator 323, the phosphorus filter 324, the pre-filter 214, and the detection unit.

[0095] The pre-sampling purification module 21 can form multiple sampling and purification pathways, which allows it to simulate multiple main purification pathways. This makes it easier to select the main purification pathway with better purification effect and lower treatment cost for the purification of phosphorus-containing wastewater.

[0096] Each of the above sampling and purification pathways can simulate the main purification pathway in the main reaction module 1. The main reaction module 1 may be able to form one or more main purification pathways that are the same as or similar to the above sampling and purification pathways. According to the specific structure of the main purification pathway, the corresponding sampling and purification pathway in the sampling and purification device 3 is selected to purify the sample. Based on the purification results, it is determined whether the effluent after the wastewater is purified by the main purification pathway can meet the total phosphorus discharge standard. If it can meet the standard, the main purification pathway corresponding to the sampling and purification pathway is suitable for the purification of this phosphorus-containing wastewater. If the effluent cannot meet the standard, the sampling and purification pathway corresponding to other main purification pathways is selected for simulation again. When multiple main purification pathways are suitable for the purification of this phosphorus-containing wastewater, the main purification pathway with relatively low purification cost is selected for purification.

[0097] It is understood that the ability to form a selectively connected first sampling purification path, second sampling purification path, third sampling purification path, fourth sampling purification path, fifth sampling purification path, sixth sampling purification path, and seventh sampling purification path in the pre-sampling purification module 21 means that when any one of the first, second, third, fourth, fifth, sixth, and seventh sampling purification paths is connected, all other paths are closed.

[0098] Optionally, the sampling and purification device 3 further includes a water outlet pipeline assembly, which includes a main water outlet pipe g9 and a first liquid storage unit 325a, a second liquid storage unit 325b, a third liquid storage unit 325c, and a fourth liquid storage unit 325d connected in parallel to the main water outlet pipe g9. The first liquid storage unit 325a, the second liquid storage unit 325b, the third liquid storage unit 325c, and the fourth liquid storage unit 325d are respectively used to collect the liquid flowing out from the outlet of the phosphorus oxidizer 321, the outlet of the phosphorus trap 322, the outlet of the phosphorus flocculant 323, and the outlet of the phosphorus filter 324. The main water outlet pipe g9 is connected to the pre-filter 214. Preferably, a pipeline rinsing and cleaning component 325e is also installed on the main water outlet pipe g9. The pipeline rinsing and cleaning component 325e is installed on the main water outlet pipe g9 through the cleaning pipeline g915 and the cleaning valve s35 on the cleaning pipeline g915. The pipeline rinsing and cleaning component 325e is located upstream of the first liquid storage component 325a.

[0099] That is, the main outlet pipe g9 is connected to the detection unit, the first liquid storage device 325a is used to collect the liquid flowing out from the outlet of the phosphorus oxidizer 321, the second liquid storage device 325b is used to collect the liquid flowing out from the outlet of the phosphorus trap 322, the third liquid storage device 325c is used to collect the liquid flowing out from the outlet of the phosphorus flocculant 323, and the fourth liquid storage device 325d is used to collect the liquid flowing out from the outlet of the phosphorus filter 324.

[0100] In this way, after the sample is purified in a certain sampling and purification channel, the sample can first flow into the corresponding liquid storage device for storage. When the detection unit needs to detect it, the liquid will flow out from the liquid storage device and enter the detection unit after passing through the pre-filter 214.

[0101] Preferably, the first liquid storage device 325a is connected to the main outlet pipe g9 via a first collection pipe g911 equipped with a first collection valve s31, the second liquid storage device 325b is connected to the main outlet pipe g9 via a second collection pipe g912 equipped with a second collection valve s32, the third liquid storage device 325c is connected to the main outlet pipe g9 via a third collection pipe g913 equipped with a third collection valve s33, and the fourth liquid storage device 325d is connected to the main outlet pipe g9 via a fourth collection pipe g914 equipped with a fourth collection valve s34.

[0102] Optionally, the sampling and purification device 3 further includes an inlet pipeline assembly, which includes a main sampling and purification inlet pipeline g16, and a first sampling and purification inlet pipeline g811, a second sampling and purification inlet pipeline g812, a third sampling and purification inlet pipeline g813, and a fourth sampling and purification inlet pipeline g814, all of which are connected to the main sampling and purification inlet pipeline g16. A first sampling and purification inlet valve s11 is installed on the first sampling and purification inlet pipeline g811, a second sampling and purification inlet valve s12 is installed on the second sampling and purification inlet pipeline g812, a third sampling and purification inlet valve s13 is installed on the third sampling and purification inlet pipeline g813, and a fourth sampling and purification inlet valve s14 is installed on the fourth sampling and purification inlet pipeline g814.

[0103] The water outlet pipeline assembly further includes a first water outlet pipeline g821 equipped with a first water outlet valve s21, a second water outlet pipeline g822 equipped with a second water outlet valve s22, a third water outlet pipeline g823 equipped with a third water outlet valve s23, and a fourth water outlet pipeline g824 equipped with a fourth water outlet valve s24.

[0104] The first water outlet pipe g821 is connected to the first liquid storage device 325a, the second water outlet pipe g822 is connected to the second liquid storage device 325b, the third water outlet pipe g823 is connected to the third liquid storage device 325c, and the fourth water outlet pipe g824 is connected to the fourth liquid storage device 325d.

[0105] The first inlet pipe g811 and the first outlet pipe g821 of the sampling and purification system are both connected to the phosphorus oxidizer 321; the second inlet pipe g812 and the second outlet pipe g822 of the sampling and purification system are both connected to the phosphorus trap 322; the third inlet pipe g813 and the third outlet pipe g823 of the sampling and purification system are both connected to the phosphorus flocculant 323; the fourth inlet pipe g814 and the fourth outlet pipe g824 of the sampling and purification system are both connected to the phosphorus filter 324; the main inlet pipe g16 of the sampling and purification system is connected to the initial wastewater unit 11; and the pre-filter device 214 is connected to the main outlet pipe g9.

[0106] The internal connecting pipeline assembly includes a main internal connecting pipeline g825, a first internal connecting pipeline with a first connecting valve s21a installed, a second internal connecting pipeline with a second connecting valve s22a installed, and a third internal connecting pipeline with a third connecting valve s23a installed.

[0107] The internal connecting pipes of the first device, the internal connecting pipes of the second device, and the internal connecting pipes of the third device are all connected to the internal connecting pipe g825 of the main device. The internal connecting pipe of the first device is connected to the phosphorus trap 322, the internal connecting pipe of the second device is connected to the phosphorus flocculant 323, and the internal connecting pipe of the third device is connected to the phosphorus filter 324.

[0108] The first water outlet pipe g821, the second water outlet pipe g822, and the third water outlet pipe g823 are all connected to the internal connecting pipe g825 of the main device, and the first water outlet pipe g821, the first internal connecting pipe, the second water outlet pipe g822, the second internal connecting pipe, the third water outlet pipe g823, and the third internal connecting pipe are arranged sequentially from upstream to downstream of the internal connecting pipe g825 of the main device.

[0109] A fourth connecting valve s212 and a fifth connecting valve s222 are also installed on the connecting pipe g825 in the main device. The fourth connecting valve s212 is located between the first connecting pipe in the device and the second outlet pipe g822, and the fifth connecting valve s222 is located between the second connecting pipe in the device and the third outlet pipe g823.

[0110] A fifth outlet valve s211 is also installed on the first outlet pipe g821. The fifth outlet valve s211 is located downstream of the first outlet valve s21. The connection point between the main device internal connecting pipe g825 and the first outlet pipe g821 is located between the first outlet valve s21 and the fifth outlet valve s211. A sixth outlet valve s221 is also installed on the second outlet pipe g822. The sixth outlet valve s221 is located downstream of the second outlet valve s22. Downstream, the connection point between the main device's internal connecting pipe g825 and the second outlet pipe is located between the second outlet valve s22 and the sixth outlet valve s221. A seventh outlet valve s231 is also installed on the third outlet pipe g823. The seventh outlet valve s231 is located downstream of the third outlet valve s23. The connection point between the main device's internal connecting pipe g825 and the third outlet pipe is located between the third outlet valve s23 and the seventh outlet valve s231.

[0111] In this way, the connection and closure of the above sampling and purification pathways can be achieved by switching the corresponding valves, thereby enabling the pre-sampling and purification module 21 to simulate the purification of phosphorus-containing wastewater by the main reaction module 1.

[0112] In one embodiment of this application, the internal connecting pipeline assembly can be replaced by multiple pipelines. Each pair of the phosphorus oxidizer 321, the phosphorus trap 322, the phosphorus flocculant 323, and the phosphorus filter 324 is connected by one of these pipelines, and each pipeline is equipped with a valve. It should be noted that the phosphorus oxidizer 321, the phosphorus trap 322, the phosphorus flocculant 323, the phosphorus filter 324, the first liquid storage unit 325a, the second liquid storage unit 325b, the third liquid storage unit 325c, the fourth liquid storage unit 325d, and the pipeline rinsing and cleaning liquid component 325e are each provided with independent drain and overflow prevention collection pipelines at appropriate locations within their respective devices. Figure 2 Not shown in the image.

[0113] Optionally, the pre-sampling and purification module 21 further includes a first sampling pump 211, a first sampling pipeline g11, a second sampling pipeline g12, and a third sampling pipeline g18.

[0114] The liquid inlet end of the first sampling pump 211 is connected to the initial sewage unit 11.

[0115] The liquid inlet ends of the first sampling line g11 and the second sampling line g12 are connected in parallel to the liquid outlet end of the first sampling pump 211, and the liquid outlet ends of the first sampling line g11 and the second sampling line g12 are connected in parallel to the liquid inlet end of the detection unit.

[0116] A first sampling valve a1 is installed on the first sampling pipeline g11.

[0117] A second sampling valve a2, the pre-filter 214, and a third sampling valve a3 are installed sequentially from upstream to downstream on the second sampling pipeline g12.

[0118] A fourth sampling valve b1, the sampling and purification device 3, the second sampling pump 31, and a fifth sampling valve b2 are installed sequentially from upstream to downstream on the third sampling pipeline g18. The liquid inlet end of the third sampling pipeline g18 is connected to the outlet end of the first sampling pump 211, and the liquid outlet end of the third sampling pipeline g18 is connected to the second sampling pipeline g12. The liquid outlet end of the third sampling pipeline g18 is located between the second sampling valve a2 and the pre-filter 214.

[0119] In this embodiment, the sampling valve refers to a valve used to open and close the corresponding sampling pipeline.

[0120] Thus, when both the fourth sampling valve b1 and the fifth sampling valve b2 are closed, and the first sampling valve a1, the second sampling valve a2, and the third sampling valve a3 are all open, the sampling purification device 3 is disconnected from the first sampling pump 211 and does not participate in the purification of the sample. The detection unit performs detection on both the sample filtered by the pre-filter device 214 and the sample not filtered by the pre-filter device 214. When both the fourth sampling valve b1 and the fifth sampling valve b2 are open, and the first sampling valve a1 and the second sampling valve a2 are closed, the sampling purification device 3 is connected to both the first sampling pump 211 and the second sampling pipeline g12. The sampling purification device 3 samples the purification of the sample and selects the optimal purification path in the main reaction module 1 based on the detection results of the detection unit.

[0121] Optionally, the main reaction module 1 further includes an internal connecting pipeline assembly, and a phosphorus oxidation unit 12, a phosphorus adsorption unit 13, a phosphorus flocculation unit 14, a phosphorus filtration unit 15, and a tail-end clean water storage unit 16 arranged sequentially from upstream to downstream. The initial wastewater unit 11 is located upstream of the phosphorus oxidation unit 12.

[0122] In this embodiment of the application, preferably, the initial wastewater unit 11 stores phosphorus-containing water pollutants (which may be the influent raw water of the wastewater treatment facility or the phosphorus-containing water pollutants after secondary activated sludge or biofilm biochemical degradation treatment), and the total phosphorus concentration in the water pollutants is generally 0.3 to 3.0 mg / L;

[0123] The phosphorus oxidation unit 12 includes adding ozone, hydrogen peroxide, iron-based or chlorine-based advanced oxidants, Fenton reaction, or other coupled oxidation processes, or supplementing the aforementioned oxidation process with photocatalysis, titanium catalysis, activated alumina, carbon-silicon, silicon-aluminum, or rare earth oxides, etc., to combine the catalytic-oxidation coupling reaction mechanism, exert a highly efficient bond-breaking effect to enhance oxidation, and optimize and reduce the dosage of oxidants. The purpose is to carry out chain-breaking decomposition of phosphorus-containing chemical functional groups in total phosphorus, thereby realizing the transformation of non-phosphorus macromolecules into small molecules, or further transforming non-positive 5-valent states into positive 5-valent orthophosphate pollutants.

[0124] The phosphorus capture unit 13 adds phosphorus adsorption of powders or fixed adsorption beds with good specific surface area and adsorption capacity, such as bioadsorbents, physicochemical adsorbents, electrolytic adsorption, or activated and modified adsorption carriers, to capture and adsorb phosphorus pollutants, migrate phosphorus pollutants from the aqueous phase to the adsorbent solid phase attachment surface, and further remove them through subsequent precipitation of adsorbed particulate flocs or fine filtration.

[0125] The phosphorus flocculation unit 14 is a flocculation function reaction unit for chemical dosing flocculation and clear liquid separation (precipitation or flotation), which is used to remove phosphorus-containing suspended solids or particulate pollutants through solid-liquid two-phase separation and by removing the excess sludge.

[0126] The phosphorus filtration unit 15 is a functional unit that uses homogeneous filter media of a 2-10 mm deep filter bed, or multi-layer graded heterogeneous filter media, or 10-20 μm filter cloth to filter out suspended flocs carrying phosphorus.

[0127] The initial wastewater unit 11, the phosphorus oxidation unit 12, the phosphorus adsorption unit 13, the phosphorus flocculation unit 14, the phosphorus filtration unit 15, and the final clean water storage unit 16 are connected via the internal pipeline assembly, enabling the formation of selectively connected first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth main purification pathways within the main reaction module 1.

[0128] The first main purification pathway includes the initial wastewater unit 11, the phosphorus flocculation unit 14, and the tail-end clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0129] The second main purification pathway includes the initial wastewater unit 11, the phosphorus adsorption unit 13, and the tail-end clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0130] The third main purification pathway includes the initial wastewater unit 11, the phosphorus oxidation unit 12, and the tail-end clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0131] The fourth main purification pathway includes the initial wastewater unit 11, the phosphorus adsorption unit 13, the phosphorus flocculation unit 14, and the tail-end clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0132] The fifth main purification pathway includes the initial wastewater unit 11, the phosphorus oxidation unit 12, the phosphorus flocculation unit 14, and the tail-end clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0133] The sixth main purification pathway includes the initial wastewater unit 11, the phosphorus oxidation unit 12, the phosphorus adsorption unit 13, the phosphorus flocculation unit 14, and the tail-end clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0134] The seventh main purification pathway includes, sequentially connected from upstream to downstream, the initial wastewater unit 11, the phosphorus oxidation unit 12, the phosphorus adsorption unit 13, the phosphorus flocculation unit 14, the phosphorus filtration unit 15, and the tail-end clean water storage unit 16.

[0135] The eighth main purification pathway includes the initial wastewater unit 11, the phosphorus filtration unit 15, and the final clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0136] The ninth main purification pathway includes the initial sewage unit 11, the phosphorus flocculation unit 14, the phosphorus filtration unit 15, and the tail-end clean water storage unit 16, which are connected sequentially from upstream to downstream.

[0137] In one example of this application, the intra-module connecting pipeline assembly includes a main pipeline g2 and a connecting trunk line g22, as well as a first connecting branch line g211, a second connecting branch line g311, a third connecting branch line g411, a fourth connecting branch line g511, and a fifth connecting branch line g611 arranged sequentially from upstream to downstream.

[0138] The initial wastewater unit 11, the phosphorus oxidation unit 12, the phosphorus adsorption unit 13, the phosphorus flocculation unit 14, the phosphorus filtration unit 15, and the final clean water storage unit 16 are sequentially connected via the main pipeline g2.

[0139] From upstream to downstream, the main pipeline g2 is sequentially equipped with the following main valves: first main valve v1, second main valve v11, third main valve v2, fourth main valve v21, fifth main valve v3, sixth main valve v31, seventh main valve v4, eighth main valve v41, ninth main valve v5, and tenth main valve v51.

[0140] The first main valve v1 and the second main valve v11 are both located between the initial wastewater unit 11 and the phosphorus oxidation unit 12; the third main valve v2 and the fourth main valve v21 are both located between the phosphorus oxidation unit 12 and the phosphorus adsorption unit 13; the fifth main valve v3 and the sixth main valve v31 are both located between the phosphorus adsorption unit 13 and the phosphorus flocculation unit 14; the seventh main valve v4 and the eighth main valve v41 are both located between the phosphorus flocculation unit 14 and the phosphorus filtration unit 15; and the ninth main valve v5 and the tenth main valve v51 are both located between the phosphorus filtration unit 15 and the tail-end clean water storage unit 16.

[0141] From upstream to downstream, the following valves are installed sequentially on the connecting trunk line g22: first trunk valve v12, second trunk valve v22, third trunk valve v32, and fourth trunk valve v42.

[0142] One end of the first connecting branch g211 is connected to the connecting trunk g22, and the other end is connected to the main pipeline g2. The connection between the first connecting branch g211 and the main pipeline g2 is located between the first main valve v1 and the second main valve v11. The connection between the first connecting branch g211 and the connecting trunk g22 is located upstream of the first trunk valve v12.

[0143] One end of the second connecting branch g311 is connected to the connecting trunk line g22, and the other end is connected to the main pipeline g2. The connection between the second connecting branch g311 and the main pipeline g2 is located between the third main valve v2 and the fourth main valve v21. The connection between the second connecting branch g311 and the connecting trunk line g22 is located between the first trunk valve v12 and the second trunk valve v22.

[0144] One end of the third connecting branch g411 is connected to the connecting trunk line g22, and the other end is connected to the main pipeline g2. The connection between the third connecting branch g411 and the main pipeline g2 is located between the fifth main valve v3 and the sixth main valve v31. The connection between the third connecting branch g411 and the connecting trunk line g22 is located between the second trunk valve v22 and the third trunk valve v32.

[0145] One end of the fourth connecting branch g511 is connected to the connecting trunk line g22, and the other end is connected to the main pipeline g2. The connection between the fourth connecting branch g511 and the main pipeline g2 is located between the seventh main valve v4 and the eighth main valve v41. The connection between the fourth connecting branch g511 and the connecting trunk line g22 is located between the third trunk valve v32 and the fourth trunk valve v42.

[0146] One end of the fifth connecting branch g611 is connected to the connecting trunk g22, and the other end is connected to the main pipeline g2. The position where the fifth connecting branch g611 connects to the main pipeline g2 is located between the ninth main valve v5 and the v51. The position where the fifth connecting branch g611 connects to the connecting trunk g22 is located downstream of the fourth trunk valve v42.

[0147] Optionally, the phosphorus-containing wastewater purification system provided in this application embodiment further includes a suspended solids detector 16a and a tail-end detection module 22. The tail-end detection module 22 includes a third sampling pump 221, a fourth sampling pipeline g72, a fifth sampling pipeline g71, and a second total phosphorus detector 222.

[0148] The liquid inlet of the third sampling pump 221 is connected to the tail-end clear water storage unit 16, and the suspended solids detector 16a is installed in the tail-end clear water storage unit 16.

[0149] The liquid inlet end of the fourth sampling line g72 and the liquid inlet end of the fifth sampling line g71 are connected in parallel to the liquid outlet end of the third sampling pump 221.

[0150] The liquid outlet end of the fourth sampling tube g71 and the liquid outlet end of the fifth sampling tube g71 are connected in parallel to the second total phosphorus analyzer 222.

[0151] A sixth sampling valve c2, a tail-end pre-filter device 223, and a seventh sampling valve c3 are installed sequentially from upstream to downstream on the fourth sampling pipeline g72.

[0152] An eighth sampling valve c1 is installed in the fifth sampling pipeline g71.

[0153] By installing the suspended solids detector 16a on the tail-end clean water storage unit 16, the suspended solids value in the tail-end clean water storage unit 16 can be detected. If the measured suspended solids value is lower than the expected value, the sample taken from the tail-end clean water storage unit 16 is sent to the second total phosphorus detector 222 through the fifth sampling pipeline g71 to determine the total phosphorus concentration. If the measured suspended solids value is higher than the expected value, the sample taken from the tail-end clean water storage unit 16 is sent to the tail-end pre-filtration device 223 and the second total phosphorus detector 222 through the fourth sampling pipeline g72 to determine the total phosphorus concentration after pre-filtration treatment, thereby determining whether the total phosphorus concentration or the total phosphorus concentration after pre-filtration treatment meets the total phosphorus discharge standard for tailwater.

[0154] like Figure 3 and Figure 4 Another aspect of this application provides a method for purifying phosphorus-containing wastewater based on the aforementioned phosphorus-containing wastewater purification system, the method specifically comprising the following:

[0155] Step 101: Control the pre-sampling and purification module to sample the target wastewater from the initial wastewater unit before the main reaction module purifies the target wastewater to obtain the corresponding wastewater sample;

[0156] Step 102: Based on the pre-sampling and purification module, the wastewater sample is subjected to preset treatment to obtain the corresponding purification test results, and it is determined whether the purification test results meet the preset purification conditions.

[0157] If yes, proceed to step 103; otherwise, send a prompt message to the control system to prompt for a total phosphorus source investigation of the target wastewater.

[0158] Step 103: Select at least one treatment unit corresponding to the purification test result in the main reaction module to purify the target wastewater. The treatment unit includes: a phosphorus oxidation unit, a phosphorus adsorption unit, a phosphorus flocculation unit, a phosphorus filtration unit, and a tail-end clean water storage unit.

[0159] To further improve the reliability and effectiveness of phosphorus-containing wastewater purification, in the embodiments of the phosphorus-containing wastewater purification method provided in this application, the pre-sampling purification module can form a first sampling purification path, a second sampling purification path, a third sampling purification path, a fourth sampling purification path, a fifth sampling purification path, a sixth sampling purification path, and a seventh sampling purification path that are selectively connected; the pre-sampling purification module can also form an eighth sampling purification path and a ninth sampling purification path. The eighth sampling purification path includes a first sampling pump, a second sampling valve, a pre-filter, a third sampling valve, and a detection unit connected sequentially from upstream to downstream. The ninth sampling purification path includes a first sampling pump, a first sampling valve, and the detection unit; a suspended solids detector is also installed on the tail-end clear water storage unit, and the tail-end clear water storage unit is connected to the tail-end detection module; steps 102 and 103 in the phosphorus-containing wastewater purification method specifically include the following:

[0160] Step 1021: The total phosphorus concentration and phosphate concentration of the wastewater sample are detected using the ninth sampling purification pathway, and the difference between the total phosphorus concentration and the phosphate concentration is taken as the current first purification detection result; or, Step 1022: The total phosphorus concentration of the wastewater sample is detected using the eighth sampling purification pathway, and the wastewater sample is then subjected to pre-filtration treatment, and the total phosphorus concentration after pre-filtration is detected, and the difference between the total phosphorus concentration and the total phosphorus concentration after pre-filtration is taken as the current first purification detection result; In this embodiment, the total phosphorus concentration can be written as TP, the phosphate concentration can be written as PO, and the total phosphorus concentration after pre-filtration can be written as STP.

[0161] Step 1023: Determine whether the first purification detection result is less than or equal to a preset phosphorus concentration threshold; in this embodiment, the phosphorus concentration threshold can be written as P max (e.g., P) max If the concentration is ≤0.3 mg / L, then step 1023 can be used to determine whether the first inequality holds. Specifically, the first inequality corresponding to the first purification detection result composed of TP and PO is (TP-PO-P). max )≤0, the first inequality corresponding to the first purification test result composed of TP and STP is: (TP-STP-P)≤0, max )≤0.

[0162] If the first purification detection result is determined to be less than or equal to the phosphorus concentration threshold, then steps 1031 and 104 are executed:

[0163] Step 1031: Select at least one processing unit corresponding to the first purification detection result in the main reaction module and turn it on to purify the target wastewater.

[0164] In step 1031, if the current first purification detection result is the difference between the total phosphorus concentration value and the phosphate concentration value, then the phosphorus flocculation unit and the phosphorus filtration unit are selected in the main reaction module, and the corresponding valves in the main reaction module are controlled to allow the target wastewater to flow from the initial wastewater unit into the phosphorus flocculation unit and the phosphorus filtration unit for purification treatment.

[0165] If the current first purification detection result is the difference between the total phosphorus concentration value and the total phosphorus concentration value after pre-filtration, then the phosphorus filtration unit is selected in the main reaction module, and the corresponding valve in the main reaction module is controlled to allow the target wastewater to flow from the initial wastewater unit into the phosphorus filtration unit for purification treatment.

[0166] Step 104: Obtain corresponding purification effect detection data based on the suspended solids detector and the tail-end detection module; specifically, by installing the suspended solids detector in the tail-end clean water storage unit, the suspended solids value (suspended solids value can be written as SS) in the tail-end clean water storage unit can be detected. If the measured suspended solids value is lower than the expected value (e.g., SS≤30 mg / L), the sample obtained from the tail-end clean water storage unit is sent through the fifth sampling pipeline to the second total phosphorus detector to determine the total phosphorus concentration (TP). If TP≤P max If the inequality is not met, then it is determined whether the purified wastewater meets the total phosphorus discharge standard for effluent. If it does not meet the standard, then TP≤P max If an inequality is found, a prompt message is sent to the control system to indicate that a total phosphorus source investigation should be conducted for the target wastewater. If the measured suspended solids value is higher than the expected value (e.g., SS > 30 mg / L), the sample taken from the tail-end clear water storage unit is sequentially fed into the tail-end pre-filtration device and the second total phosphorus detector through the fourth sampling pipeline to determine the total phosphorus concentration (STP) after pre-filtration. If STP ≤ P max If the inequality is not met, then the treated wastewater is judged to meet the total phosphorus discharge standard for effluent. If it does not meet the standard, then STP≤P max If an inequality is found, a prompt message is sent to the control system to indicate that a total phosphorus source investigation should be conducted for the target wastewater.

[0167] If it is determined that the first purification detection result is greater than the phosphorus concentration threshold, then step 1024 is executed;

[0168] Step 1024: Sequentially select one of the first, second, third, fourth, fifth, sixth, and seventh sampling purification pathways and connect them to form the current target purification pathway. Then, perform a preset simulated purification detection and judgment step on this target purification pathway. The simulated purification detection and judgment step includes: performing simulated purification treatment on the wastewater sample based on the target purification pathway; performing pre-filtration treatment on the wastewater sample after simulated purification treatment; and detecting the pre-filtered total phosphorus concentration (STP) and the pre-filtered phosphate concentration (which can be written as SPO) of the pre-filtered wastewater sample. The difference between the pre-filtered total phosphorus concentration and the pre-filtered phosphate concentration is used as the current second purification detection result. Determine whether the current second purification detection result is less than or equal to the phosphorus concentration threshold, i.e., determine whether the second inequality holds. Specifically, determine whether the second inequality (STP-SPO-P) corresponding to the second purification detection result composed of STP and SPO holds. max Does ≤0 hold true?

[0169] If it is determined that the current second purification detection result is less than or equal to the phosphorus concentration threshold, then steps 1032 and 104 are executed:

[0170] Step 1032: Stop executing the simulated purification detection step for subsequent pathways targeting the purification pathway, and select at least one processing unit corresponding to the current second purification detection result in the main reaction module to start purifying the target wastewater; specifically, the first sampling purification pathway corresponds to the first main purification pathway, the second sampling purification pathway corresponds to the second main purification pathway, the third sampling purification pathway corresponds to the third main purification pathway, the fourth sampling purification pathway corresponds to the fourth main purification pathway, the fifth sampling purification pathway corresponds to the fifth main purification pathway, the sixth sampling purification pathway corresponds to the sixth main purification pathway, and the seventh sampling purification pathway corresponds to the seventh main purification pathway.

[0171] Step 104: Obtain corresponding purification effect detection data based on the suspended matter detector and the tail end detection module.

[0172] If it is determined that the current second purification detection result is greater than the phosphorus concentration threshold, then step 1033 is executed: reconnect the new target purification path, and return to execute the simulated purification detection and judgment steps for the new target purification path;

[0173] Step 105: If the simulated purification detection and judgment steps have been performed for the first, second, third, fourth, fifth, sixth, and seventh sampling purification paths, and no second purification detection result less than or equal to the phosphorus concentration threshold has been obtained, then a prompt message is sent to the control system to prompt for a total phosphorus source investigation of the target wastewater.

[0174] The phosphorus-containing wastewater purification system and method provided in this application mainly focus on the optimization and targeted removal of complex phosphorus-oxygen bonds, carbon-phosphorus bond functional groups and / or phosphorus-containing pollutants in wastewater. On the one hand, it can ensure that the total phosphorus in the effluent of the phosphorus-containing wastewater purification system meets the discharge standards. On the other hand, it can also appropriately optimize the treatment route during operation, avoid redundancy in the reaction treatment path, reduce treatment costs and improve purification efficiency.

[0175] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A phosphorus-containing wastewater purification system, characterized in that, The system includes a main reaction module and a pre-sampling and purification module. The main reaction module includes an initial wastewater unit, and the pre-sampling and purification module is connected to the initial wastewater unit. The main reaction module also includes internal connecting pipeline components, and phosphorus oxidation unit, phosphorus adsorption unit, phosphorus flocculation unit, phosphorus filtration unit, and tail-end clean water storage unit arranged sequentially from upstream to downstream. The initial wastewater unit is located upstream of the phosphorus oxidation unit. Ozone, hydrogen peroxide, iron-based or chlorine-based advanced oxidants, or any one or more coupled oxides from the Fenton reaction can be added to the phosphorus oxidation unit; or photocatalytic, titanium catalytic, activated alumina, carbon-silicon, silicon-aluminum, or rare earth oxide modified catalytic functional agents can be added to the phosphorus oxidation unit. Biosorbents, physicochemical adsorbents, electrolytic adsorbents, or activated and modified adsorption carriers are added to the phosphorus capture unit. The initial wastewater unit, the phosphorus oxidation unit, the phosphorus adsorption unit, the phosphorus flocculation unit, the phosphorus filtration unit, and the final purified water storage unit are connected via the internal pipeline assembly, enabling the formation of selectively connected first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth main purification pathways within the main reaction module. The pre-sampling and purification module includes a sampling and purification device, a pre-filtration device, and a detection unit connected sequentially from upstream to downstream. The detection unit includes a first total phosphorus analyzer and a phosphate analyzer connected in parallel. The sampling and purification device includes a phosphorus oxidizer, a phosphorus trap, a phosphorus flocculant, and a phosphorus filter stacked sequentially from top to bottom. The inlets of the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculant, and the phosphorus filter are connected in parallel to the initial wastewater unit. The outlets of the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculant, and the phosphorus filter are connected in parallel to the detection unit. Each inlet is equipped with an inlet valve, and each outlet is equipped with an outlet valve. The pre-sampling and purification module is used to sample from the initial wastewater unit and purify the sample to select the purification path of the main reaction module based on the purification results.

2. The phosphorus-containing wastewater purification system according to claim 1, characterized in that, The sampling and purification device also includes an internal connecting pipeline assembly. The phosphorus oxidizer, the phosphorus trap, the phosphorus flocculator, and the phosphorus filter are connected through the internal connecting pipeline assembly to form a first sampling and purification path, a second sampling and purification path, a third sampling and purification path, a fourth sampling and purification path, a fifth sampling and purification path, a sixth sampling and purification path, and a seventh sampling and purification path, which can be selectively connected in the pre-sampling and purification module. The first sampling and purification pathway includes the phosphorus flocculant, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream. The second sampling and purification pathway includes the phosphorus trap, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream. The third sampling and purification pathway includes the phosphorus oxidizer, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream. The fourth sampling and purification pathway includes the phosphorus trap, the phosphorus flocculant, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream. The fifth sampling and purification pathway includes the phosphorus oxidizer, the phosphorus flocculation device, the pre-filter, and the detection unit, which are connected sequentially from upstream to downstream. The sixth sampling and purification pathway includes, in sequence from upstream to downstream, the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculator, the pre-filter, and the detection unit. The seventh sampling and purification pathway is connected sequentially from upstream to downstream to the phosphorus oxidizer, the phosphorus trap, the phosphorus flocculator, the phosphorus filter, the pre-filter, and the detection unit.

3. The phosphorus-containing wastewater purification system according to claim 2, characterized in that, The sampling and purification device further includes a water outlet pipeline assembly, which includes a main water outlet pipeline and a first liquid storage unit, a second liquid storage unit, a third liquid storage unit, and a fourth liquid storage unit connected in parallel to the main water outlet pipeline. The first liquid storage unit, the second liquid storage unit, the third liquid storage unit, and the fourth liquid storage unit are respectively used to collect liquids flowing out from the outlet of the phosphorus oxidizer, the outlet of the phosphorus trap, the outlet of the phosphorus flocculant, and the outlet of the phosphorus filter. The main water outlet pipeline is connected to the pre-filter for water samples.

4. The phosphorus-containing wastewater purification system according to claim 3, characterized in that, The sampling and purification device further includes an inlet pipeline assembly, which includes a main sampling and purification inlet pipeline, and a first sampling and purification inlet pipeline, a second sampling and purification inlet pipeline, a third sampling and purification inlet pipeline, and a fourth sampling and purification inlet pipeline, all of which are connected to the main sampling and purification inlet pipeline. A first sampling and purification inlet valve is installed on the first sampling and purification inlet pipeline, a second sampling and purification inlet valve is installed on the second sampling and purification inlet pipeline, a third sampling and purification inlet valve is installed on the third sampling and purification inlet pipeline, and a fourth sampling and purification inlet valve is installed on the fourth sampling and purification inlet pipeline. The water outlet pipeline assembly further includes a first water outlet pipeline equipped with a first water outlet valve, a second water outlet pipeline equipped with a second water outlet valve, a third water outlet pipeline equipped with a third water outlet valve, and a fourth water outlet pipeline equipped with a fourth water outlet valve. The first water outlet pipe is connected to the first liquid storage device, the second water outlet pipe is connected to the second liquid storage device, the third water outlet pipe is connected to the third liquid storage device, and the fourth water outlet pipe is connected to the fourth liquid storage device. The first inlet and first outlet water pipes of the sampling and purification system are both connected to the phosphorus oxidizer; the second inlet and second outlet water pipes of the sampling and purification system are both connected to the phosphorus trap; the third inlet and third outlet water pipes of the sampling and purification system are both connected to the phosphorus flocculant; the fourth inlet and fourth outlet water pipes of the sampling and purification system are both connected to the phosphorus filter; the main inlet water pipe of the sampling and purification system is connected to the initial wastewater unit; and the pre-filter is connected to the main outlet water pipe. The internal connecting pipeline assembly includes a main internal connecting pipeline, a first internal connecting pipeline with a first connecting valve, a second internal connecting pipeline with a second connecting valve, and a third internal connecting pipeline with a third connecting valve. The internal connecting pipes of the first device, the internal connecting pipes of the second device, and the internal connecting pipes of the third device are all connected to the internal connecting pipe of the main device. The internal connecting pipe of the first device is connected to the phosphorus trap, the internal connecting pipe of the second device is connected to the phosphorus flocculator, and the internal connecting pipe of the third device is connected to the phosphorus filter. The first water outlet pipe, the second water outlet pipe, and the third water outlet pipe are all connected to the internal connecting pipe of the main device, and the first water outlet pipe, the internal connecting pipe of the first device, the second water outlet pipe, the internal connecting pipe of the second device, the third water outlet pipe, and the internal connecting pipe of the third device are arranged in sequence from upstream to downstream of the internal connecting pipe of the main device. A fourth connecting valve and a fifth connecting valve are also installed on the connecting pipeline inside the main device. The fourth connecting valve is located between the connecting pipeline inside the first device and the second water outlet pipeline, and the fifth connecting valve is located between the connecting pipeline inside the second device and the third water outlet pipeline. A fifth outlet valve is also installed on the first outlet pipe, located downstream of the first outlet valve. The connection point between the main device's internal connecting pipe and the first outlet pipe is located between the first outlet valve and the fifth outlet valve. A sixth outlet valve is also installed on the second outlet pipe, located downstream of the second outlet valve. The connection point between the main device's internal connecting pipe and the second outlet pipe is located between the second outlet valve and the sixth outlet valve. A seventh outlet valve is also installed on the third outlet pipe, located downstream of the third outlet valve. The connection point between the main device's internal connecting pipe and the third outlet pipe is located between the third outlet valve and the seventh outlet valve.

5. The phosphorus-containing wastewater purification system according to claim 4, characterized in that, The pre-sampling and purification module also includes a first sampling pump, a first sampling pipeline, a second sampling pipeline, and a third sampling pipeline. The liquid inlet end of the first sampling pump is connected to the initial sewage unit. The liquid inlet ends of the first sampling pipeline and the second sampling pipeline are connected in parallel to the liquid outlet end of the first sampling pump, and the liquid outlet ends of the first sampling pipeline and the second sampling pipeline are connected in parallel to the liquid inlet end of the detection unit. A first sampling valve is installed on the first sampling pipeline. A second sampling valve, the pre-filter, and a third sampling valve are installed sequentially from upstream to downstream on the second sampling pipeline. A fourth sampling valve, the sampling and purification device, a second sampling pump, and a fifth sampling valve are installed sequentially from upstream to downstream on the third sampling pipeline. The liquid inlet end of the third sampling pipeline is connected to the outlet end of the first sampling pump, and the liquid outlet end of the third sampling pipeline is connected to the second sampling pipeline. The liquid outlet end of the third sampling pipeline is located between the second sampling valve and the pre-filter.

6. The phosphorus-containing wastewater purification system according to any one of claims 1-5, characterized in that, The first main purification pathway includes the initial wastewater unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream. The second main purification pathway includes the initial wastewater unit, the phosphorus capture unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream. The third main purification pathway includes the initial wastewater unit, the phosphorus oxidation unit, and the final clean water storage unit, which are connected sequentially from upstream to downstream. The fourth main purification pathway includes the initial wastewater unit, the phosphorus adsorption unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream. The fifth main purification pathway includes the initial wastewater unit, the phosphorus oxidation unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream. The sixth main purification pathway includes the initial wastewater unit, the phosphorus oxidation unit, the phosphorus adsorption unit, the phosphorus flocculation unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream. The seventh main purification pathway includes, sequentially connected from upstream to downstream, the initial wastewater unit, the phosphorus oxidation unit, the phosphorus adsorption unit, the phosphorus flocculation unit, the phosphorus filtration unit, and the tail-end clean water storage unit. The eighth main purification pathway includes the initial wastewater unit, the phosphorus filtration unit, and the final clean water storage unit, which are connected sequentially from upstream to downstream. The ninth main purification pathway includes the initial sewage unit, the phosphorus flocculation unit, the phosphorus filtration unit, and the tail-end clean water storage unit, which are connected sequentially from upstream to downstream.

7. The phosphorus-containing wastewater purification system according to claim 6, characterized in that, It also includes a suspended solids detector and a tail-end detection module, the tail-end detection module comprising a third sampling pump, a fourth sampling pipeline, a fifth sampling pipeline, and a second total phosphorus detector. The liquid inlet of the third sampling pump is connected to the tail-end clear water storage unit, and the suspended solids detector is installed in the tail-end clear water storage unit. The liquid inlet ends of the fourth and fifth sampling lines are connected in parallel to the liquid outlet end of the third sampling pump. The liquid outlet ends of the fourth and fifth sampling lines are connected in parallel to the second total phosphorus analyzer. A sixth sampling valve, a tail-end pre-filter, and a seventh sampling valve are installed sequentially from upstream to downstream on the fourth sampling pipeline. An eighth sampling valve is installed in the fifth sampling pipeline.

8. A method for purifying phosphorus-containing wastewater, characterized in that, The phosphorus-containing wastewater purification method is implemented using the phosphorus-containing wastewater purification system according to any one of claims 1 to 7, and includes: The pre-sampling and purification module is controlled to sample the target wastewater from the initial wastewater unit before the main reaction module purifies the target wastewater to obtain the corresponding wastewater sample. Based on the pre-sampling and purification module, the wastewater sample is subjected to preset treatment to obtain the corresponding purification test result. It is determined whether the purification test result meets the preset purification conditions. If so, at least one processing unit corresponding to the purification test result is selected in the main reaction module to purify the target wastewater. The processing unit includes: a phosphorus oxidation unit, a phosphorus adsorption unit, a phosphorus flocculation unit, a phosphorus filtration unit, and a tail-end clean water storage unit.

9. The method for purifying phosphorus-containing wastewater according to claim 8, characterized in that, The pre-sampling purification module can form a first sampling purification path, a second sampling purification path, a third sampling purification path, a fourth sampling purification path, a fifth sampling purification path, a sixth sampling purification path, and a seventh sampling purification path that can be selectively connected. The pre-sampling and purification module can also form an eighth sampling and purification path and a ninth sampling and purification path. The eighth sampling and purification path includes a first sampling pump, a second sampling valve, a pre-filter, a third sampling valve, and a detection unit connected sequentially from upstream to downstream. The ninth sampling and purification path includes a first sampling pump, a first sampling valve, and the detection unit. The tail end clean water storage unit is also equipped with a suspended solids detector, and the tail end clean water storage unit is connected to the tail end detection module. Correspondingly, the step of performing pre-processing on the wastewater sample based on the pre-sampling and purification module to obtain corresponding purification test results, and determining whether the purification test results meet the preset purification conditions, includes: The wastewater sample's current total phosphorus concentration and phosphate concentration are detected using the ninth sampling purification pathway, and the difference between the total phosphorus concentration and the phosphate concentration is used as the current first purification detection result; alternatively, the wastewater sample's current total phosphorus concentration is detected using the eighth sampling purification pathway, and then the wastewater sample undergoes pre-filtration treatment, and the pre-filtered wastewater sample's total phosphorus concentration is detected, with the difference between the pre-filtered total phosphorus concentration and the pre-filtered total phosphorus concentration used as the current first purification detection result. Determine whether the first purification detection result is less than or equal to a preset phosphorus concentration threshold; If the first purification detection result is determined to be less than or equal to the phosphorus concentration threshold, at least one processing unit corresponding to the first purification detection result is selected in the main reaction module and activated to purify the target wastewater, and the corresponding purification effect detection data is obtained based on the suspended solids detector and the tail end detection module. If the first purification detection result is determined to be greater than the phosphorus concentration threshold, then one of the following sampling purification pathways—the first, second, third, fourth, fifth, sixth, and seventh—is sequentially selected and connected to form the current target purification pathway. A preset simulated purification detection and judgment step is then performed on this target purification pathway. This simulated purification detection and judgment step includes: performing simulated purification treatment on the wastewater sample based on the target purification pathway; pre-filtering the wastewater sample after simulated purification treatment and detecting the pre-filtered total phosphorus concentration and the pre-filtered phosphate concentration; using the difference between the pre-filtered total phosphorus concentration and the pre-filtered phosphate concentration as the current second purification detection result; and determining whether the current second purification detection result is less than or equal to the phosphorus concentration threshold. If it is determined that the current second purification detection result is less than or equal to the phosphorus concentration threshold, the simulated purification detection step is stopped for the subsequent pathways of the target purification pathway. At least one processing unit corresponding to the current second purification detection result is selected in the main reaction module and turned on to purify the target wastewater. The corresponding purification effect detection data is obtained based on the suspended solids detector and the tail end detection module. If it is determined that the current second purification detection result is greater than the phosphorus concentration threshold, then a new target purification pathway is reconnected, and the simulated purification detection and judgment steps are returned for the new target purification pathway. If the simulated purification detection and judgment steps have been performed for the first, second, third, fourth, fifth, sixth, and seventh sampling purification pathways, and no second purification detection result less than or equal to the phosphorus concentration threshold has been obtained, then a prompt message is sent to the control system to prompt for a total phosphorus source investigation of the target wastewater.

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