Drinking water production drainage recycling device and method

Abstract

The invention provides a drinking water production drainage recycling device and method, and relates to the technical field of drinking water production. The drinking water production discharged water recycling device comprises an ozone generator host, a programmable logic controller, a touch screen, a tank washing system and a bottle washing system. According to the invention, by introducing a multi-parameter online water quality monitoring and intelligent diversion mechanism, real-time discrimination and risk control of organic pollution and physicochemical indexes in recycled drainage are realized, unqualified water is prevented from entering a recycling system from the source, and the prominent problem of insufficient safety guarantee capability of recycled water quality in the prior art is effectively solved; by constructing a multi-dimensional collaborative decision-making system based on the liquid level, the water quality and the storage time, accurate and automatic distribution of recycled water among different purposes is realized, so that the cyclic utilization efficiency of water resources and the intelligent operation level of the system are remarkably improved on the premise of strictly guaranteeing the safety of the water quality.

Description

Technical Field

[0001] This invention relates to the field of drinking water production technology, specifically to a device and method for recycling and utilizing wastewater from drinking water production. Background Technology

[0002] In the drinking water production sector, wastewater recycling systems have become a standard feature of modern water plants, enabling the intensive use of water resources. Initially, these systems primarily used simple pipes to collect and reuse overflowing finished water during shutdowns. Later, basic filtration and storage units were gradually introduced to improve water yield and reduce waste. With technological advancements, the complexity and automation of recycling systems have continuously increased, forming a basic technical framework integrating collection, temporary storage, and distribution.

[0003] However, existing recycling systems still have significant drawbacks in practical applications. First, their water quality safety assurance capabilities are insufficient. Most systems rely solely on simple mechanical filtration, lacking effective online monitoring and control methods for potential organic pollutants and microbial growth in the water, posing safety risks to the reclaimed water. Second, the systems have low levels of automation and intelligence. Water resource allocation largely depends on manual judgment or simple level control, failing to make precise and automatic decisions based on real-time water quality, storage time, and other multi-dimensional parameters, resulting in low recycling efficiency and an inability to maximize recycling rates while ensuring safety. Furthermore, existing systems suffer from poor coordination between units, lacking an integrated closed-loop control strategy, making it difficult to conduct systematic risk warnings and optimized management of the entire recycling process.

[0004] Therefore, it is necessary to improve and optimize the structure of existing drinking water production wastewater recycling devices in order to solve the prominent problems such as poor controllability of water quality safety, low level of intelligent resource allocation, and insufficient system coordination. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device and method for recycling and utilizing wastewater from drinking water production, which solves the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drinking water production wastewater recycling device, comprising an ozone generator main unit, a programmable logic controller, a touch screen, a tank washing system, and a bottle washing system, and further comprising: The oxidation product water tank has a drainage pipe connected to its side wall; A recycling tank, which is connected to the drainage pipe via a pipe, is used to receive wastewater from the oxidation product tank; A water quality monitoring unit is installed on the drainage pipe to detect the quality of the discharged water; The diversion unit is located on the drainage pipe downstream of the water quality monitoring unit and is configured to direct water to the recycling tank or the forced discharge pipe according to the water quality test results. An ozone dosing unit, which is connected to the ozone generator main unit and the recycling water tank, is used to add and dissolve ozone into the recycling water tank; The distribution unit includes a main outlet pipe connected to the lower part of the recycled water tank, and a first branch pipe, a second branch pipe and a third branch pipe connected in parallel to the main outlet pipe; Preferably, the first branch pipe is provided with a recycling filter, a first distribution pump and a first distribution pump valve in sequence along the water flow direction, and is finally connected to a recycling processing water tank; Preferably, the second branch pipe is equipped with a second distribution water pump and a second distribution water pump valve, and is used to connect to the washing tank system; Preferably, the third branch pipe is equipped with a third distribution water pump and a third distribution water pump valve, and is used to connect to the bottle washing system.

[0007] Preferably, the water quality monitoring unit includes a mechanical filtration device, an online conductivity meter, an online TOC analyzer, and an online turbidity meter arranged sequentially along the water flow direction; Preferably, the diversion unit is a three-way solenoid valve.

[0008] Preferably, the recycled water tank is equipped with a monitoring component for monitoring its internal state, the monitoring component including a liquid level sensor, an online dissolved ozone concentration monitor, and a temperature sensor; Preferably, the sensing parts of the dissolved ozone concentration online monitoring instrument and the temperature sensor are located on the lower part of the side wall of the recycling water tank and are kept submerged.

[0009] Preferably, the ozone dosing unit includes a circulating pump, an ejector, and an aeration disc; Preferably, the inlet of the circulating pump is connected to the lower part of the recovery water tank, and its outlet is connected to the inlet of the ejector; The ozone injection inlet of the jet injector is connected to the main unit of the ozone generator. The outlet of the jet injector is connected to the aeration disc located inside the recovery water tank via a mixing dosing pipe.

[0010] Preferably, differential pressure sensors are installed at the inlet and outlet of the recycling filter.

[0011] Preferably, a water inlet valve for the recycling tank is provided between the drainage pipe and the recycling tank.

[0012] Preferably, the programmable logic controller is electrically connected to the online conductivity meter, online TOC analyzer, online turbidity meter, three-way solenoid valve, liquid level sensor, dissolved ozone concentration online monitor, temperature sensor, ozone generator main unit, circulation pump, differential pressure sensor, first distribution water pump, first distribution water pump valve, second distribution water pump, second distribution water pump valve, third distribution water pump and third distribution water pump valve; Preferably, the touchscreen is connected to the programmable logic controller.

[0013] Preferably, the programmable logic controller is configured to perform the following controls: Acquire the detection data from the online conductivity meter, online TOC analyzer, and online turbidity meter, and control the conduction path of the three-way solenoid valve; The system acquires data from the online dissolved ozone concentration monitor and controls the start-up, shutdown, and output of the ozone generator main unit. The system acquires data from the liquid level sensor and controls the start / stop combinations of the first, second, and third distribution pumps and their valves based on a preset liquid level threshold.

[0014] Preferably, the programmable logic controller is further configured to: The clogging status of the recovery filter is determined based on the data from the differential pressure sensor, and an early warning is issued. The system status, parameters, and alarm information are displayed on the touchscreen.

[0015] A method of using a drinking water production wastewater recycling device, comprising the following steps: S1. When the filling machine stops, the water in the oxidized finished product water tank is discharged through the drain pipe and then filtered by the mechanical filter device, as well as detected by the online conductivity meter, online TOC analyzer and online turbidity meter. S2. Based on the detection data from step S, the programmable logic controller controls the three-way solenoid valve to introduce qualified water into the recycling tank through the recycling tank inlet valve, and to discharge unqualified water through the forced discharge pipe. S3, the dissolved ozone concentration online monitor monitors the ozone concentration in the recycled water tank in real time. The programmable logic controller controls the ozone dosing unit and the ozone generator main unit to maintain the preset ozone concentration range in the water tank based on this data. S4. The programmable logic controller controls the start and stop of the first, second, and third distribution pumps and their valves based on the liquid level data of the recovery water tank monitored by the liquid level sensor, combined with the preset liquid level threshold and the water quality of the recovery water, and distributes the recovery water to the recovery processing water tank, the tank washing system or the bottle washing system according to priority for utilization.

[0016] This invention provides a device and method for recycling and utilizing wastewater from drinking water production. It has the following beneficial effects: Compared with existing technologies, this drinking water production wastewater recycling device and method, by introducing a multi-parameter online water quality monitoring and intelligent diversion mechanism, achieves real-time identification and risk control of organic pollution and physicochemical indicators in the recycled wastewater, preventing unqualified water from entering the recycling system at the source, and effectively solving the prominent problem of insufficient water quality safety assurance in existing technologies.

[0017] Compared with existing technologies, this drinking water production wastewater recycling device and method, by constructing a multi-dimensional collaborative decision-making system based on liquid level, water quality and storage time, achieves precise and automatic allocation of recycled water among different uses, thereby significantly improving the efficiency of water resource recycling and the intelligent operation level of the system while strictly ensuring water quality safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a partial structural diagram of the water recycling tank of the present invention; Figure 4 This is a schematic diagram of a partial structure of the jet ejector of the present invention; Figure 5 This is a partial cross-sectional view of the connection structure of the mixing dosing pipe, the recovery tank, and the aeration disc of the present invention; Figure 6 This is a schematic diagram of the structure of the recycling filter of the present invention.

[0019] The components include: 1. Oxidation finished product water tank; 2. Drainage pipe; 3. Mechanical filtration device; 4. Online conductivity meter; 5. Online TOC analyzer; 6. Online turbidity meter; 7. Three-way solenoid valve; 8. Forced discharge pipe; 9. Recycled water tank; 10. Recycled water tank inlet valve; 11. Dissolved ozone concentration online monitoring instrument; 12. Liquid level sensor; 13. Temperature sensor; 14. Ozone dosing device; 1401. Circulation pump; 1402. Circulation pipe; 1403. Ejector. 14031, Ozone dosing inlet; 14032, Mixing dosing pipe; 15, Main outlet pipe; 16, First branch pipe; 17, Second branch pipe; 18, Third branch pipe; 19, Recovery filter; 20, Differential pressure sensor; 21, First distribution pump; 22, First distribution pump valve; 23, Recovery processing water tank; 24, Second distribution pump; 25, Second distribution pump valve; 26, Third distribution pump; 27, Third distribution pump valve; 28, Aeration disc. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example:

[0022] like Figures 1 to 6 As shown, this embodiment of the invention provides a device and method for recycling drinking water production wastewater.

[0023] 1. System Platform Construction and Core Control Unit To construct a complete recycling system platform and provide a solid hardware foundation for subsequent intelligent control, the device includes an ozone generator main unit as the core control and execution basis, a programmable logic controller (PLC), a touch screen, a tank washing system, and a bottle washing system. The PLC is preferably a Siemens S7-1500 series PLC, which boasts powerful processing capabilities and can efficiently run complex control algorithms and multi-channel PID control loops. The touch screen is a Weintek MT8150XIP model, whose 12-inch large screen can clearly display liquid level, water quality curves, equipment status, and alarm information in distinct zones, facilitating operator monitoring. The ozone generator main unit uses the Ozonia LAB2B series, which allows for precise control of ozone production and features a built-in Profibus-DP interface for communication with the PLC, facilitating the receipt of start / stop and adjustment commands. The tank washing system and bottle washing system are existing facilities in the factory, and this system connects to them via pipes and valves. Through the above structure, this system establishes a high-performance and highly reliable control and execution core, ensuring full automation from signal acquisition and intelligent decision-making to command output, laying a solid foundation for the stable and intelligent operation of the entire recycling system.

[0024] 2. Source drainage and multi-barrier water quality access control To achieve strict control over the quality of recycled water from the source and address the shortcomings of existing technologies in monitoring organic pollution and overall water quality, the device also includes an oxidation product water tank 1, whose side wall is connected to a drainage pipe 2; a recycling water tank 9, which is connected to the drainage pipe 2 via a pipe to receive drainage from the oxidation product water tank 1; a water quality monitoring unit, which is installed on the drainage pipe 2; and a diversion unit, which is installed on the drainage pipe 2 downstream of the water quality monitoring unit. The water quality monitoring unit includes a mechanical filter 3, an online conductivity meter 4, an online TOC analyzer 5, and an online turbidity meter 6, arranged sequentially along the water flow direction; the diversion unit is a three-way solenoid valve 7. A recycling water tank inlet valve 10 is installed between the drainage pipe 2 and the recycling water tank 9.

[0025] In practical implementation, the mechanical filtration device 3 uses a Pall Profile series 5-micron precision stainless steel quick-opening filter, facilitating regular filter replacement. The online conductivity meter 4 is a Mettler-Toledo InPro7100 series, equipped with automatic temperature compensation. The online TOC analyzer 5 is a key sensor in this system, using a Hach TL2310 model. Employing the UV-persulfate oxidation method, it can quickly and accurately detect total organic carbon in the range of 0.1 ppb to 5.0 ppm, effectively providing early warning of microbial metabolites or trace cleaning agent residues. The online turbidity meter 6 is a Hach SOLITAXsc model with a range of 0-100 NTU. The three-way solenoid valve 7 and the recovery water tank inlet valve 10 are both Burkert 283 models, with PP valve bodies and EPDM diaphragms, resistant to ozone corrosion.

[0026] When the filling machine stops, causing the liquid level in the oxidized finished product tank 1 to rise and requiring drainage, the water first enters the mechanical filter device 3 to filter out any trace amounts of suspended particles such as resin and toner that may have detached from upstream, protecting the subsequent precision sensors. Subsequently, the water flows sequentially through the online conductivity meter 4, the online TOC analyzer 5, and the online turbidity meter 6 for real-time, online multi-parameter water quality assessment. All sensors' 4-20mA analog signal output lines are connected to the analog input module of a Siemens S7-1500 PLC.

[0027] Through the above structure, the programmable logic controller (PLC) can acquire comprehensive and high-precision water quality data and compare it in real time with preset safety thresholds (e.g., conductivity ≤ 20 μS / cm, TOC ≤ 0.5 mg / L, turbidity ≤ 0.5 NTU). When all parameters consistently meet the standards for more than a preset stabilization time (e.g., 10 seconds), the PLC determines that the water quality is qualified, controls the three-way solenoid valve 7 to open the pipeline to the inlet valve 10 of the recycling water tank, and allows water to enter the recycling water tank 9. When any water quality parameter exceeds the standard, the PLC immediately controls the three-way solenoid valve 7 to switch to the forced discharge pipeline 8 for discharge, and records the abnormal event on the human-machine interface. This design ensures from the source that only fully qualified water is allowed to enter the recycling process, effectively preventing the recycling system from being polluted by drainage of unknown water quality, and establishing the first intelligent safety barrier.

[0028] 3. Intelligent antibacterial and status monitoring of the recycled water tank To address the risk of microbial growth in recycled water during storage, ensure the biological stability of water quality within the tank, and provide key status parameters for intelligent allocation, the recycled water tank 9 is equipped with monitoring components for monitoring its internal status. These components include a liquid level sensor 12, an online dissolved ozone concentration monitor 11, and a temperature sensor 13. The sensing parts of the online dissolved ozone concentration monitor 11 and the temperature sensor 13 are located on the lower part of the side wall of the recycled water tank 9 and remain submerged.

[0029] In practice, the recycling tank 9 is a 30-ton capacity SUS304 stainless steel rectangular tank with a mirror-polished interior and an external insulation layer. The level sensor 12 is an E+H (Endress+Hauser) Micropilot FMR67 radar level gauge, installed on the top of the tank, capable of non-contact continuous level measurement with an accuracy of ±2mm. The dissolved ozone concentration online monitor 11 uses a ProMinent DULCOTESTDAC series amperometric sensor, whose unique flow channel design ensures accurate measurement and rapid response. The temperature sensor 13 is a standard PT100 platinum resistance thermometer.

[0030] Through the above structure, the PLC can obtain the precise liquid level of the recycling tank 9, the concentration of the core antibacterial factor (ozone), and the water temperature (water temperature affects the microbial reproduction rate and ozone solubility) in real time. This data is not only the basis for executing subsequent allocation logic, but also a key indicator for assessing the stability of water quality within the tank.

[0031] 4. Precise control and efficient mixing of the ozone dosing unit To add and precisely control the concentration of dissolved ozone into the recycled water tank 9 for effective antibacterial and preservation purposes, the ozone dosing unit 14 is connected to the ozone generator main unit and the recycled water tank 9. The ozone dosing unit 14 includes a circulation pump 1401, an ejector 1403, and an aeration disc 28. The inlet of the circulation pump 1401 is connected to the lower part of the recycled water tank 9, and its outlet is connected to the inlet of the ejector 1403. The ozone dosing inlet 14031 of the ejector 1403 is connected to the ozone generator main unit. The outlet of the ejector 1403 is connected to the aeration disc 28 located inside the recycled water tank 9 via a mixing dosing pipe 14032.

[0032] In practical implementation, the circulating pump 1401 is a Grundfos CRN series vertical multistage centrifugal pump, made of SUS304 stainless steel, which can provide stable and sufficient pressure and flow. The ejector 1403 is a PMazziInjector type, which is specially selected according to the operating conditions of the circulating pump to ensure optimal air intake efficiency and mixing effect. The aeration disc 28 is a SUS316 titanium microporous aeration disc, which can disperse the ozone-containing water flow into extremely fine bubbles, greatly increasing the gas-liquid contact area, allowing ozone to diffuse more evenly throughout the water tank.

[0033] When the system is running, the dissolved ozone concentration online monitor 11 continuously monitors the residual ozone concentration in the water and transmits the signal to the PLC. The PLC compares this value with a set range (e.g., 0.02-0.05 ppm). If the concentration is below the lower limit, the PLC first starts the circulation pump 1401 to establish water circulation, then starts the ozone generator and instructs it to output ozone at a certain power. Ozone gas is drawn in by the jet injector 1403 and mixes violently with the circulating water to form high-concentration dissolved ozone water, which is finally released through the aeration disc 28. If the concentration reaches the upper limit, the PLC shuts down the ozone generator, but the circulation pump 1401 can continue to run for a period of time to promote uniform mixing of the water in the tank. Through the above structure, the system realizes closed-loop automatic control of the dissolved ozone concentration in the recovery water tank 9, dynamically maintaining an effective antibacterial environment, overcoming the problem of easy deterioration of static water storage, and ensuring the biological safety of the recovered water during storage.

[0034] 5. Construction of a graded recycling system and end-point security assurance To achieve intelligent and on-demand allocation of recycled water resources for different uses, improve utilization efficiency, and ensure absolute safety for the highest-level use (reuse filling), the device is equipped with a distribution unit, which includes a main outlet pipe 15 connected to the lower part of the recycled water tank 9, and a first branch pipe 16, a second branch pipe 17, and a third branch pipe 18 connected in parallel to the main outlet pipe 15. The first branch pipe 16 is sequentially equipped with a recycling filter 19, a first distribution water pump 21, and a first distribution water pump valve 22 along the water flow direction, and is ultimately connected to a recycling processing water tank 23; the second branch pipe 17 is equipped with a second distribution water pump 24 and a second distribution water pump valve 25, and is used to connect to a tank washing system; the third branch pipe 18 is equipped with a third distribution water pump 26 and a third distribution water pump valve 27, and is used to connect to a bottle washing system.

[0035] In practice, all pipelines are made of food-grade UPVC. The first distribution pump 21, the second distribution pump 24, and the third distribution pump 26 are all Grundfos NB series pipeline pumps. All valves (22, 25, 27) are Burkert 283 electric ball valves.

[0036] To ensure the final safety of the recycled water allocated to its highest purpose (filling) and to monitor the operation of the protection unit for predictive maintenance, differential pressure sensors 20 are installed at the inlet and outlet of the recycling filter 19 in the first branch pipe 16.

[0037] In practice, the recycling filter 19 is a Pall Profile series 1-micron precision polysulfone pleated cartridge filter, serving as the final barrier before reuse and refilling. The differential pressure sensor 20 is a Siestag Deltabar SPMD75, whose high-precision pressure sensors are connected to the filter's inlet and outlet via pressure-sensing tubes.

[0038] When the PLC starts the first distribution circuit, the recycling filter 19 performs final fine filtration on the water to be reused, ensuring it fully meets or even exceeds the inlet water standards of the bottling line. Simultaneously, the differential pressure sensor 20 continuously monitors the pressure loss across the filter. Through this structure, the PLC can obtain real-time information on filter clogging. When the differential pressure exceeds a preset alarm threshold (e.g., 0.15 MPa), the PLC does not immediately stop the system. Instead, it issues a warning message via the touchscreen: "Recycling filter 19 cartridge is about to become clogged; please prepare for replacement," reminding maintenance personnel to schedule planned maintenance. This achieves an upgrade from "post-fault maintenance" to "predictive maintenance," avoiding unplanned downtime and consistently ensuring the filtration quality of the reused water.

[0039] 6. Intelligent allocation decision logic based on multidimensional data To address the problem that existing technologies rely on a single decision-making mechanism and cannot comprehensively consider multiple factors such as water quantity, water quality, and time for optimal allocation, the programmable logic controller is configured to acquire data from the liquid level sensor 12 and control the start-stop combination of the first, second, and third allocation pumps and their valves based on a preset liquid level threshold.

[0040] In practical implementation, the PLC of this system is pre-installed with an advanced multi-parameter collaborative decision-making program. Its decision-making is not only based on the liquid level, but also integrates water quality data from the dissolved ozone concentration online monitor 11 (dynamically marking the water as A / B / C level) and the "water age" calculated based on the influent time.

[0041] Example of decision-making logic: When the liquid level in the recovery water tank 9 is only higher than the intermediate level (e.g., 1500mm), the PLC only starts the third distribution water pump 26 and the third distribution water pump valve 27 to use the water for the bottle washing system with the lowest requirements.

[0042] When the liquid level is higher than the high liquid level (e.g., 1900mm), and the ozone concentration in the water tank is stable within the Class A range and the water age is less than 4 hours, the PLC will sequentially start the first distribution water pump 21 and the first distribution water pump valve 22 to reuse the optimal water after fine filtration through the recovery filter 19 for use in the filling line.

[0043] If the differential pressure sensor 20 indicates that the pressure is approaching the upper limit, or the dissolved ozone concentration online monitor 11 shows that the concentration is too low (the water quality has dropped to Grade B), the system will automatically prevent the first distribution pump from starting, or redirect the water to a lower-level application, even if the liquid level is very high.

[0044] Through the aforementioned multi-dimensional intelligent decision-making and execution, the system ensures the intelligent and precise allocation of water resources under the premise of absolute safety, realizing the leap from "simple recycling" to "smart water use," maximizing water yield, and minimizing any possible pollution risks.

[0045] 7. System integration and monitoring To achieve centralized monitoring, data recording, and interaction of the system, the programmable logic controller (PLC) is electrically connected to the online conductivity meter 4, online TOC analyzer 5, online turbidity meter 6, three-way solenoid valve 7, liquid level sensor 12, dissolved ozone concentration online monitor 11, temperature sensor 13, ozone generator main unit, circulation pump 1401, differential pressure sensor 20, first distribution pump 21, first distribution pump valve 22, second distribution pump 24, second distribution pump valve 25, third distribution pump 26, and third distribution pump valve 27. The touchscreen is connected to the PLC. The PLC is further configured to: determine the clogging status of the recovery filter 19 based on data from the differential pressure sensor 20 and issue an early warning; and display system status, parameters, and alarm information via the touchscreen.

[0046] Through this complete system integration, operators can have a comprehensive overview on the Weintek touchscreen, gaining real-time knowledge of the status of every step from drainage monitoring and ozone dosing to distribution. All key parameters, such as instantaneous TOC values, ozone concentration curves, and filter differential pressure, are recorded and their historical trends can be queried. If any abnormality occurs in any step, such as excessive water quality, failed ozone dosing, or filter clogging, the system will immediately display a prominent alarm window on the touchscreen and record the event, guiding the operator to take quick action and significantly improving the system's maintainability and operational reliability.

[0047] Summary of working principles The drinking water production wastewater recycling device and method provided in this invention operates on the core principle of a closed-loop control system involving "multi-level sensing, intelligent decision-making, and precise execution" to achieve safe and efficient wastewater recycling. The system rigorously inspects the source wastewater using a mechanical filtration device 3, an online conductivity meter 4, an online TOC analyzer 5, and an online turbidity meter 6. Automatic access control is achieved using a three-way solenoid valve 7, ensuring the basic quality of the recycled water from the source. In the storage stage, a closed-loop antibacterial system, consisting of an online dissolved ozone concentration monitor 11 and an ozone dosing unit 14 (circulation pump 1401, jet injector 1403, and aeration disc 28), dynamically preserves the water quality in the recycled water tank 9, resolving safety hazards during storage. Ultimately, in the utilization phase, the programmable logic controller (PLC) acts as the "brain," integrating multiple dimensions of information, including water volume from the level sensor 12, water quality grade, filter status from the differential pressure sensor 20, and "water age." Through a built-in intelligent decision matrix, it directs the first, second, and third distribution pumps (21, 24, 26) and their valves to precisely and automatically allocate water to the recycling and processing tank 23, the tank washing system, or the bottle washing system, adhering to the principles of "high-quality water for optimal use, high-quality water for high-efficiency use, and safety first." The entire system is centrally monitored and managed via a touchscreen, thereby significantly improving the resource utilization efficiency, automation level, and environmental benefits of the entire drinking water production system while absolutely ensuring the safety of core products.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for recycling and utilizing wastewater from drinking water production, comprising an ozone generator main unit, a programmable logic controller, a touch screen, a tank washing system, and a bottle washing system, characterized in that, Also includes: An oxidation finished product water tank (1) has a drainage pipe (2) connected to its side wall; A recycling tank (9) is connected to the drainage pipe (2) via a pipe to receive drainage from the oxidation product tank (1); A water quality monitoring unit is installed on the drainage pipe (2) for detecting the quality of the drainage water; The diversion unit is located on the drainage pipe (2) downstream of the water quality monitoring unit and is configured to direct water to the recycling tank (9) or the forced discharge pipe (8) according to the water quality test results. Ozone dosing unit (14), which is connected to the ozone generator main unit and the recycling water tank (9), is used to add and dissolve ozone into the recycling water tank (9); The distribution unit includes a main outlet pipe (15) connected to the lower part of the recycling tank (9), and a first branch pipe (16), a second branch pipe (17) and a third branch pipe (18) connected in parallel to the main outlet pipe (15). The first branch pipe (16) is sequentially provided with a recycling filter (19), a first distribution water pump (21) and a first distribution water pump valve (22) along the water flow direction, and is finally connected to a recycling processing water tank (23). The second branch pipe (17) is equipped with a second distribution water pump (24) and a second distribution water pump valve (25), and is used to connect to the washing tank system; The third branch pipe (18) is equipped with a third distribution water pump (26) and a third distribution water pump valve (27), and is used to connect to the bottle washing system.

2. The drinking water production wastewater recycling device according to claim 1, characterized in that: The water quality monitoring unit includes a mechanical filtration device (3), an online conductivity meter (4), an online TOC analyzer (5), and an online turbidity meter (6) arranged sequentially along the water flow direction. The flow diversion unit is a three-way solenoid valve (7).

3. The drinking water production wastewater recycling device according to claim 2, characterized in that: The recycling tank (9) is equipped with a monitoring component for monitoring its internal state, which includes a liquid level sensor (12), an online dissolved ozone concentration monitor (11), and a temperature sensor (13). The sensing parts of the dissolved ozone concentration online monitoring instrument (11) and the temperature sensor (13) are located on the lower part of the side wall of the recycling water tank (9) and are kept submerged.

4. The drinking water production wastewater recycling device according to claim 3, characterized in that: The ozone dosing unit (14) includes a circulation pump (1401), an ejector (1403), and an aeration disc (28). The inlet of the circulating pump (1401) is connected to the lower part of the recovery water tank (9), and its outlet is connected to the inlet of the jet injector (1403); The ozone injection inlet (14031) of the jet injector (1403) is connected to the main unit of the ozone generator; The outlet of the jet injector (1403) is connected to the aeration disc (28) located inside the recovery tank (9) via a mixing dosing pipe (14032).

5. A drinking water production wastewater recycling device according to claim 4, characterized in that: Differential pressure sensors (20) are installed at the inlet and outlet of the recycling filter (19).

6. A drinking water production wastewater recycling device according to claim 5, characterized in that: A water inlet valve (10) for the recycling tank is provided between the drainage pipe (2) and the recycling tank (9).

7. A drinking water production wastewater recycling device according to claim 6, characterized in that: The programmable logic controller is electrically connected to the online conductivity meter (4), online TOC analyzer (5), online turbidity meter (6), three-way solenoid valve (7), liquid level sensor (12), dissolved ozone concentration online monitor (11), temperature sensor (13), ozone generator main unit, circulation pump (1401), differential pressure sensor (20), first distribution water pump (21), first distribution water pump valve (22), second distribution water pump (24), second distribution water pump valve (25), third distribution water pump (26) and third distribution water pump valve (27); The touchscreen is connected to the programmable logic controller.

8. A drinking water production wastewater recycling device according to claim 7, characterized in that: The programmable logic controller is configured to perform the following controls: Acquire the detection data of the online conductivity meter (4), online TOC analyzer (5) and online turbidity meter (6), and control the conduction path of the three-way solenoid valve (7); Acquire data from the dissolved ozone concentration online monitoring instrument (11) and control the start-up, shutdown and output of the ozone generator host; The data from the liquid level sensor (12) is acquired, and the start-stop combination of the first, second, and third distribution pumps and their valves is controlled according to the preset liquid level threshold.

9. A drinking water production wastewater recycling device according to claim 8, characterized in that: The programmable logic controller is further configured to: The clogging status of the recovery filter (19) is determined based on the data from the differential pressure sensor (20), and an early warning is issued. The system status, parameters, and alarm information are displayed on the touchscreen.

10. A method of using a drinking water production wastewater recycling device, wherein the drinking water production wastewater recycling device according to claim 9 is used for recycling, characterized in that: The method of use includes the following steps: S1. When the filling machine stops, the water in the oxidized finished product water tank (1) is discharged through the drain pipe (2) and filtered by the mechanical filter device (3) in sequence, as well as detected by the online conductivity meter (4), the online TOC analyzer (5) and the online turbidity meter (6); S2. The programmable logic controller controls the three-way solenoid valve (7) according to the detection data in step (S1) to introduce the qualified water into the recycling water tank (9) through the recycling water tank inlet valve (10), and the unqualified water is discharged through the forced discharge pipe (8). S3, Dissolved ozone concentration online monitoring instrument (11) monitors the ozone concentration in the recycled water tank (9) in real time. The programmable logic controller controls the ozone dosing unit (14) and the ozone generator host to work based on this data in order to maintain the preset ozone concentration range in the water tank. S4. The programmable logic controller controls the start and stop of the first, second and third distribution pumps and their valves based on the liquid level data of the recovery water tank (9) monitored by the liquid level sensor (12), combined with the preset liquid level threshold and the water quality of the recovery water, and distributes the recovery water to the recovery processing water tank (23), the tank washing system or the bottle washing system for use according to priority.

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