CN115893748A - Intelligent self-adaptation running water production system - Google Patents

Abstract

The invention relates to the technical field of tap water production and treatment, and discloses an intelligent self-adaptive tap water production system which comprises a conventional treatment unit, an advanced treatment unit, a dosing unit, an online detection unit, an override unit, a pipeline switching unit, a control unit and the like, wherein the conventional treatment unit is connected with the pipeline switching unit; when the system works, the outlet water quality grade is selected in advance through the operation module, the control unit controls the dosing unit to automatically dose according to the selected outlet water quality grade and the water source water quality parameter detected by the online detection unit, and controls the pipeline switching unit to automatically switch to form different water treatment flow paths, so that the outlet water quality requirement of a target grade is obtained; when the effluent quality does not meet the effluent quality requirement of the target grade, automatically switching to the effluent quality requirement lower by one grade to operate and sending out an early warning signal; when the effluent quality is restored to the effluent quality requirement of the target grade, automatically switching back to the original grade for operation; when the effluent quality does not meet the lowest-grade effluent quality requirement, a fault signal is sent out to prompt personnel to maintain.

Description

Intelligent self-adaptation running water production system

Technical Field

The invention relates to the technical field of tap water production and treatment, in particular to an intelligent self-adaptive tap water production system.

Background

In the conventional tap water treatment process, three sections of physical and chemical treatment, namely coagulation, precipitation and filtration, are commonly used to remove colloidal particles and fine suspended particles in a water body, so that the purpose of purifying water quality is achieved. In the coagulation section, coagulation agents are added to destroy the stability of the colloid, and the destabilized colloid and fine suspended matters are combined to form flocs through adsorption, bridging and net catching. The sedimentation section enables the concrete to sink into the water bottom for separation under the action of gravity, thereby achieving the purpose of solid-liquid separation. The precipitated treated water still contains trace amount of floc, and the turbidity and suspended matter of the effluent are ensured to reach the standard through filtration and interception, so that the aim of finally purifying the water quality is fulfilled.

Three sections of process rings in the conventional tap water treatment process are buckled, wherein a coagulation process section plays an important role in removing colloid particles, fine suspended particles, heavy metal ions and the like in water. In the prior art, during coagulation treatment, the dosage is generally adjusted according to the inlet water turbidity and then according to empirical data or an empirical curve, the dosage control is not accurate enough, the coagulation effect is not particularly ideal, the coagulant dosage is wasted, and the hidden danger of excessive ions is increased.

Therefore, the water produced by the water works at present basically does not reach the quality of the water which can be directly drunk. In the prior art, there are also some water treatment test platforms with advanced treatment modules, such as the utility model with publication number CN216785898U and publication date of 21/06/2022, entitled an intelligent multifunctional fixed pilot plant water plant. However, the method is developed only aiming at a test platform, and is used for carrying out process research and staff training on water production; it is difficult to meet the actual operation requirements of the water plant.

In recent years, the demand of people for the quality of drinking water is gradually increased, and the control in various water treatment processes directly influences the final effluent quality. In view of the above, how to optimize the water plant treatment process so as to obtain stable, reliable, safe and directly drinkable tap water is a subject of considerable research.

Disclosure of Invention

The invention aims to provide a tap water production system which can automatically select the quality of outlet water and automatically adjust the water treatment process flow according to the water quality change of a water source so as to obtain a stable target water quality output requirement, and at least provides a beneficial selection or creation condition for solving one or more technical problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme.

An intelligent self-adaptive tap water production system comprises.

The conventional treatment unit comprises a coagulation device, a precipitation device, a quartz sand filter, a GAC filter and a BAC filter which are sequentially connected through connecting pipelines, wherein the coagulation device is provided with six coagulation grids which are connected in series, and water flows in each coagulation grid in sequence.

The advanced treatment unit, the advanced treatment unit includes milipore filter purifier, receives the membrane purifier, milipore filter purifier with receive the intake end of membrane purifier through corresponding connecting line respectively with the quartz sand filtering pond the GAC filtering pond with the play water end in BAC filtering pond is connected, milipore filter purifier with receive the play water end of membrane purifier and connect the disinfection pond through corresponding connecting line respectively and go out water, milipore filter purifier's play water end still through connecting line with receive the intake end of membrane purifier and connect.

And the dosing unit comprises a mixing tank positioned at the upstream of the coagulation unit and a dosing device corresponding to the mixing tank, the dosing device is used for dosing a plurality of different coagulants, each different coagulant is dosed independently, and the dosing amount can be controlled according to set parameters.

The online detection unit comprises a plurality of water quality detection devices, a plurality of turbidity detection devices, a plurality of granularity detection devices and a plurality of current detectors, wherein the water inlet end of raw water is provided with the water quality detection devices, each coagulation lattice is internally provided with the water outlet end of the precipitation device, the water outlet end of the quartz sand filter tank is provided with the water outlet end of the GAC filter tank, the water outlet end of the BAC filter tank is provided with the water outlet end of the ultrafiltration membrane water purification device, and the water outlet end of the nanofiltration membrane water purification device is respectively provided with the turbidity detection devices and the granularity detection devices, and the last coagulation lattice is internally provided with the current detectors and the electrical parameters for detecting particles. The parameters detected by the water quality detection device comprise turbidity, pH value, dissolved oxygen, conductivity, temperature, volatile phenol, cadmium and COD _Mn Ammonia nitrogen, etc.

The overrunning unit is composed of a plurality of overrunning pipelines, a first overrunning pipeline is arranged between the coagulation device and the water inlet end of the advanced treatment unit, a second overrunning pipeline is arranged between the quartz sand filter tank and the contact disinfection tank, a third overrunning pipeline is arranged between the water outlet end of the GAC filter tank and the contact disinfection tank, and a fourth overrunning pipeline is arranged between the water outlet end of the BAC filter tank and the contact disinfection tank.

And the pipeline switching module consists of a plurality of on-off valves which are arranged on each connecting pipeline and on each overrunning pipeline.

The control unit is in control connection with the online detection unit, the medication administration unit and the pipeline switching unit; the control unit comprises an operation module, a display module and an early warning module, effluent water quality parameters of different grades are stored in the control unit in advance, and the effluent water quality parameters of all the grades meet the requirements of national standard GB 5749.

When the automatic chemical dosing device works, the effluent quality grade is selected in advance through the operation module, the chemical dosing unit is controlled by the control unit to automatically dose chemicals according to the selected effluent quality grade and the water source water quality parameters detected by the online detection unit, and the pipeline switching unit is controlled to automatically switch to form different water treatment flow channels, so that the effluent quality requirement of a target grade is obtained; when the effluent quality does not meet the effluent quality requirement of a target grade, automatically switching to the operation of the effluent quality requirement of a lower grade and sending an early warning signal; when the effluent quality is restored to the effluent quality requirement of the target grade, automatically switching back to the original grade for operation; when the effluent quality does not meet the lowest-grade effluent quality requirement, a fault signal is sent out to prompt personnel to maintain.

Compared with the prior art, the intelligent self-adaptive tap water production system provided by the invention can realize linkage of the water quality of the inlet water source and the water quality of the outlet water, can automatically switch the required tap water treatment process according to the characteristics of the water quality of the water source, the types and the concentrations of pollutants, and can obtain the requirement of the water quality of the outlet water of a target grade. On the premise that the water outlet grade meets the national standard (GB 5749-2022), the invention can also increase the water outlet grade according to the requirement so as to meet the requirement of higher drinking water quality and finally obtain the tap water capable of being directly drunk.

Compared with the deep treatment of a reverse osmosis membrane, the deep treatment of the ultrafiltration membrane or the nanofiltration membrane has the advantages of less wastewater and high water yield, but has a poor filtering effect on ions with small molecular weights, such as calcium ions, magnesium ions, aluminum ions and the like. In the conventional treatment process in the early stage, the invention can effectively control the contents of ions with small molecular weights such as calcium ions, magnesium ions, aluminum ions and the like by specific process settings, such as prejudgment of water quality of a water source, automatic dosing control of a dosing unit according to a prejudgment result and regulation control by combining six-grid coagulation, thereby obtaining direct drinking tap water through an ultrafiltration membrane or a nanofiltration membrane in the later stage, and providing an effective method for realizing the production of the direct drinking tap water of a tap water plant.

It should be noted that, the corresponding relationship between the effluent quality level and the water quality parameters of the water source, the chemical dosing type and the chemical dosing amount, and the switching basis of the water treatment flow path, and the settings of the early warning threshold and the fault threshold are obtained by testing in advance and stored in the control unit. These correspondences, thresholds etc. can also be adjusted or updated by the control unit for the purpose of system optimization.

As a further explanation of the scheme, an intermediate water tank is connected with the upstream of the ultrafiltration membrane water purifier and the nanofiltration membrane water purifier, and water to be subjected to advanced treatment enters the intermediate water tank in advance and then enters the ultrafiltration membrane water purifier or the nanofiltration membrane water purifier through corresponding on-off valves for treatment, or is subjected to advanced treatment sequentially through the ultrafiltration membrane water purifier and the nanofiltration membrane water purifier.

The specific working principle is as follows: and a first water outlet quality detection device is arranged behind the quartz sand filter, and when the water quality detected by the corresponding particle detection device and the water quality detection device meets the set requirement, the corresponding on-off valve is opened, so that the water output from the corresponding filter enters the middle water tank or the contact disinfection tank at the water outlet end.

And a second effluent water quality detection device is arranged behind the GAC filter, and when the water quality detected by the corresponding particle detection device and the water quality detection device meets the set requirement, the corresponding on-off valve is opened, so that the water output from the corresponding filter enters the middle water tank or the contact disinfection tank at the water outlet end.

And a third water outlet quality detection device is arranged behind the BAC filter, and when the water quality detected by the corresponding particle detection device and the water quality detection device meets the set requirement, the corresponding on-off valve is opened, so that the water output from the corresponding filter enters the middle water tank or the contact disinfection tank at the water outlet end.

And selecting water in the intermediate water tank to enter the ultrafiltration membrane water purifying device and the nanofiltration membrane water purifying device or sequentially enter the ultrafiltration membrane water purifying device and the nanofiltration membrane water purifying device for advanced treatment.

As a further explanation of the above solution, the intelligent adaptive advanced drinking water treatment system further comprises a disinfection unit, wherein the disinfection unit comprises a first ozone column arranged at the upstream of the coagulation device and a second ozone column arranged between the GAC filter and the BAC filter; the second ozone column is composed of two ozone columns connected in series.

Ozone is a broad-spectrum disinfectant, and the strong oxidation of the ozone can lead various components in microbial cells to generate irreversible changes to die, can effectively inactivate pathogens, protozoa and algae, has quick action and low consumption, and does not leave toxic and harmful substances. Meanwhile, the ozone also has a good removing effect on trace organic matters in the water. The invention combines the first ozone column and the two second ozone columns, and can effectively ensure that the colony number of the discharged water reaches the standard.

As a further explanation of the above scheme, corresponding stirrers are respectively arranged in the mixing tank and each coagulation lattice, and the stirrers are variable frequency stirrers; during operation, the stirring intensity of each stirrer is adjusted according to the type and the amount of the added medicament, the water quality conditions detected by the corresponding turbidity detection device and the corresponding granularity detection device so as to realize the optimal coagulation effect, thereby ensuring that the subsequent effluent quality can reach the target grade.

It should be noted that the correspondence between the type of the chemical, the amount of water, the water quality conditions detected by the turbidity detecting means and the particle size detecting means, and the agitation intensity of each agitator is obtained from experience or a preliminary test and stored in the control unit. For system optimization purposes, this correspondence can also be adjusted or updated by the control unit.

As a further illustration of the above scheme, the precipitation device can be a radial flow type precipitation device, a vertical flow type precipitation device, an inclined plate (pipe) type precipitation device or a horizontal flow type precipitation device. The invention is preferably an inclined plate (pipe) type precipitation device, because the floc particles are larger and uniform and have high precipitation speed after the coagulation is fully carried out by the coagulation grids in the front, and the water production efficiency can be better improved by selecting the inclined plate (pipe) type precipitation device.

As a further explanation of the above scheme, the quartz sand filter tank adopts modified filter sand, and the modified filter sand is preferably iron oxide modified quartz sand. And fully soaking quartz sand into a ferric chloride solution, and then calcining the quartz sand in a muffle furnace at high temperature to obtain the quartz sand.

The iron oxide modified sand filter has the advantages that: can greatly improve the adsorption performance of the filter sand, and has remarkable effect on the water treatment of the micro-polluted water source with low turbidity and high organic matter content. Compared with the conventional filter sand, the iron oxide modified filter sand has the advantages of high efficiency, easiness in operation, stability, low energy consumption, low pollution, low cost and the like.

As a further explanation of the scheme, the GAC filter tank is a granular activated carbon filter tank, the interior of granular activated carbon has a developed pore structure and a huge specific surface area, and the GAC filter tank has strong adsorption performance and also provides an ideal habitat for microorganisms. The amount of the biological film attached to the granular active carbon is 4-8 times of that of the anthracite and quartz sand filter material; and the removal rate of the GAC filter on ammonia nitrogen is hardly influenced at low temperature, and the removal rate of the GAC filter on AOC can be kept above 80%.

As a further explanation of the scheme, the BAC filter is a biological activated carbon filter, adopts activated carbon added with ozone to form a biological activated carbon process, and has oxidation and biological treatment effects. The biological activated carbon filtration not only utilizes the huge surface adsorption of the activated carbon and the electrostatic affinity of various groups to further adsorb residual substances in water, but also utilizes microorganisms growing on the biological activated carbon to decompose residual organic substances, ammonia nitrogen and the like in water, thereby ensuring the thoroughness of drinking water treatment, greatly reducing the possibility of generating disinfection byproducts by subsequent chlorine disinfection and increasing the biological stability of the drinking water.

It should be noted that the GAC filter and the BAC filter are optional further filtration treatment devices in the water purification process. And in the working process, whether the GAC filter and the BAC filter are used is determined according to the effluent quality requirement of the target grade and the detected water source quality and/or the effluent quality condition of the quartz sand filter. For example, when the permanganate index of the water quality of the outlet water with the target grade is required to be below 3.0mg/L, if the permanganate index of the water quality of the water source exceeds 6.0mg/L, the GAC filter and the BAC filter need to be started for further filtration treatment. According to experience or experimental data, other conditions for starting the GAC filter and the BAC filter can be set to ensure that the effluent quality can reach the target level.

As a further explanation of the above scheme, the intelligent self-adaptive tap water production system further comprises a sewage treatment unit, the sewage treatment unit is connected with the coagulation device, the sludge water discharged by the sedimentation device and the backwash wastewater of each filter, the sludge water and the backwash wastewater are treated by the sewage treatment unit, and then supernatant is taken to flow back to the coagulation device for reuse, thereby effectively reducing wastewater discharge.

As a further explanation of the above scheme, a micro interface generator is further arranged in each coagulation grid of the coagulation device, and the micro interface generator is connected with an air compressor to generate micro bubbles. During operation, the micro-interface generator is controlled to be started according to the water quality conditions detected by the turbidity detection device and the granularity detection device which are arranged in each coagulation grid, and then the optimal flocculation effect is achieved.

In the present invention, the purpose of providing a micro-interface generator in the coagulation apparatus is to control the particle size of the flocs. When the floc structure is loose and the particles are fine, the agglomeration of the floc can be promoted by starting the micro-interface generator, so that larger alum flocs are formed, and the purpose of enhancing the flocculation effect is achieved. When the floc particles are large, the detection effect of the current detector is influenced, and the floc needs to be crushed at the moment, so that the particle size of the floc is stabilized in a reasonable range; at this time, the micro-interface generator and the stirrer are started to form large bubbles, so that a better alum blossom crushing effect is achieved.

The technical scheme provided by the invention at least has the following technical effects or advantages.

1. The quality of the outlet water is adjustable, the required process can be automatically switched according to the characteristics of the water quality of a water source, the types and the concentrations of pollutants and the set target outlet water quality, and stable, reliable and safe tap water is finally obtained. Particularly, according to different actual needs, high-grade target outlet water quality can be set, and tap water (direct drinking tap water) capable of being directly drunk can be obtained.

2. The yield is large, and the effluent quality is safe and reliable. Due to the multi-level effluent quality control, in the actual operation process, when the effluent quality does not meet the effluent quality requirement of a target level, the operation is automatically switched to the effluent quality requirement of a lower level, and an early warning signal is sent out; the water supply continuity and the water yield can be ensured, maintenance personnel can find and discharge faults in time conveniently, and the reliability and the safety of the effluent quality are ensured.

3. In the aspect of water supply treatment of tap water, in order to realize direct drinking of tap water, a more ideal choice is to carry out advanced treatment on raw water through an ultrafiltration membrane or a nanofiltration membrane after coagulation, precipitation and filtration, and compared with the advanced treatment of a reverse osmosis membrane, the advanced treatment of the ultrafiltration membrane or the nanofiltration membrane has the advantages of less waste water and large water yield, but has a poor filtering effect on ions with small molecular weights, such as calcium ions, magnesium ions, aluminum ions and the like. In the conventional treatment process in the early stage, the content of ions with small molecular weight such as calcium ions, magnesium ions, aluminum ions and the like can be effectively controlled through specific process setting, so that direct drinking tap water can be obtained through an ultrafiltration membrane or a nanofiltration membrane in the later stage, and an effective method is provided for realizing the production of the direct drinking tap water in a tap water plant.

Drawings

Fig. 1 is a process flow diagram of an intelligent adaptive tap water production system according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of the coagulation device.

Fig. 3 is a schematic diagram showing a structure of a conventional processing unit.

FIG. 4 is a schematic diagram of the depth processing unit.

Fig. 5 is a process flow chart of an intelligent adaptive tap water production system according to embodiment 2 of the present invention.

Fig. 6 is a schematic structural view of a conventional processing unit in embodiment 2.

Fig. 7 is a schematic structural diagram of an intelligent adaptive tap water production system according to embodiment 2 of the present invention.

Reference numerals indicate the same.

1: coagulation device, 1-1: coagulation grid, 2: precipitation apparatus, 3: quartz sand filter, 4: GAC filter, 5: BAC filter, 6: ultrafiltration membrane purifier, 7: nanofiltration membrane water purifier, 8: contact disinfection tank, 9-1: mixing pool, 9-2: medication administration device, 10-1: first override pipe, 10-2: second override pipe, 10-3: third override pipe, 10-4: fourth override pipe, 10-5: fifth override pipe, 11-1: current detector, 11-2: turbidity detection device, 11-3: particle size detection device, 12: micro-interface generator, 13: variable frequency stirrer, 14-1: first ozone column, 14-2: second ozone column, 15: lifting pool, 16: intermediate water tank, 17: ozone generating device, 18: tail gas destruction device, 19: air compressor, 20: a sewage treatment unit.

Detailed Description

The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Example 1.

Referring to fig. 1, an intelligent adaptive tap water production system includes.

The device comprises a conventional treatment unit, wherein the conventional treatment unit comprises a coagulation device 1, a precipitation device 2, a quartz sand filter 3, a GAC filter 4 and a BAC filter 5 which are sequentially connected through connecting pipelines.

The advanced treatment unit, the advanced treatment unit includes milipore filter purifier 6, receives filter membrane purifier 7, milipore filter purifier 6 with receive filter membrane purifier 7 intake the end through corresponding connecting line respectively with quartz sand filter 3 GAC filter 4 with the play water end in BAC filter 5 is connected, milipore filter purifier 6 with receive filter membrane purifier 7's play water end and connect 8 play waters in the contact disinfection pond through corresponding connecting line respectively, milipore filter purifier 6's play water end still through connecting line with receive filter membrane purifier 7's the end connection of intaking.

And the dosing unit comprises a mixing tank 9-1 positioned at the upstream of the coagulation unit and a dosing device 9-2 corresponding to the mixing tank 9-1, and the dosing device 9-2 is used for dosing a plurality of different coagulants, and the different coagulants are independently dosed and can control the dosing amount according to set parameters. The specific structural design of the administration unit is within the ordinary skill of those skilled in the art and will not be described in detail herein.

The overrunning unit is composed of a plurality of overrunning pipelines, a first overrunning pipeline 10-1 is arranged between the coagulation device 1 and the water inlet end of the advanced treatment unit, a second overrunning pipeline 10-2 is arranged between the quartz sand filter 3 and the contact disinfection tank 8, a third overrunning pipeline 10-3 is arranged between the water outlet end of the GAC filter 4 and the contact disinfection tank 8, and a fourth overrunning pipeline 10-4 is arranged between the water outlet end of the BAC filter 5 and the contact disinfection tank 8.

And the pipeline switching module consists of a plurality of on-off valves (the on-off valves can be electromagnetic valves or electric valves) which are arranged on each connecting pipeline and on each overrunning pipeline. The number and the arrangement of the on-off valves are set according to requirements so as to realize the switching of the subsequent water treatment flow paths.

Wherein, the intelligent self-adaptive tap water production system also comprises an online detection unit, and the online detection unit is used for detecting the tap waterThe unit includes a plurality of water quality testing device, a plurality of turbidity detection device, a plurality of granularity detection device and a plurality of current detection appearance, intake the end at the raw water and be equipped with water quality testing device 11-1 in each congeal check in the play water end of precipitation device the play water end in quartz sand filtering pond, the play water end in GAC filtering pond the play water end in BAC filtering pond the play water end of milipore filter purifier with the play water end of receiving filter membrane purifier is equipped with turbidity detection device with granularity detection device respectively, be equipped with in last one congeals check current detection appearance, be used for detecting the electrical parameter of particulate matter. The parameters detected by the water quality detection device comprise turbidity, pH value, dissolved oxygen, conductivity, temperature, volatile phenol, cadmium and COD _Mn Ammonia nitrogen, and the like.

The intelligent self-adaptive tap water production system also comprises a control unit, wherein the control unit is in control connection with the online detection unit, the dosing unit and the pipeline switching unit; the control unit comprises an operation module, a display module and an early warning module, effluent quality parameters of different grades are stored in the control unit in advance, and the effluent quality parameters of all the grades meet the requirements of national standard GB 5749-2022.

When the automatic chemical dosing device works, the effluent quality grade is selected in advance through the operation module, the chemical dosing unit is controlled by the control unit to automatically dose chemicals according to the selected effluent quality grade and the water source water quality parameters detected by the online detection unit, and the pipeline switching unit is controlled to automatically switch to form different water treatment flow channels, so that the effluent quality requirement of a target grade is obtained; when the effluent quality does not meet the effluent quality requirement of a target grade, automatically switching to the operation of the effluent quality requirement of a lower grade and sending an early warning signal; when the effluent quality is recovered to the effluent quality requirement of the target grade, automatically switching back to the original grade for operation; when the effluent quality does not meet the lowest-grade effluent quality requirement, a fault signal is sent out to prompt personnel to maintain.

Compared with the prior art, the intelligent self-adaptive tap water production system provided by the invention can realize linkage of the water quality of the inlet water source and the water quality of the outlet water, can automatically switch the required tap water treatment process according to the characteristics of the water quality of the water source, the types and the concentrations of pollutants, and can obtain the requirement of the water quality of the outlet water of a target grade. On the premise that the water outlet grade meets the national standard (GB 5749-2022), the invention can also increase the water outlet grade according to the requirement so as to meet the requirement of higher drinking water quality and finally obtain the tap water capable of being directly drunk.

The intelligent self-adaptive tap water production system provided by the invention adopts the ultrafiltration membrane and/or the nanofiltration membrane for deep treatment, and compared with the deep treatment of the reverse osmosis membrane, the deep treatment of the ultrafiltration membrane or the nanofiltration membrane has the advantages of less wastewater and large water yield, but has a poor filtering effect on calcium ions, magnesium ions, aluminum ions and other ions with small molecular weights. In the conventional treatment process in the early stage, the invention can effectively control the contents of ions with small molecular weights such as calcium ions, magnesium ions, aluminum ions and the like by specific process settings, such as prejudgment of water quality of a water source, automatic dosing control of a dosing unit according to a prejudgment result and regulation control by combining six-grid coagulation, thereby obtaining direct drinking tap water through an ultrafiltration membrane or a nanofiltration membrane in the later stage, and providing an effective method for realizing the production of the direct drinking tap water of a tap water plant.

It should be noted that, the corresponding relationship between the effluent quality level and the water quality parameters of the water source, the chemical dosing type and the chemical dosing amount, and the switching basis of the water treatment flow path, and the settings of the early warning threshold and the fault threshold are obtained by testing in advance and stored in the control unit. These correspondences, thresholds etc. can also be adjusted or updated by the control unit for the purpose of system optimization.

Referring to fig. 2, the coagulation device 1 has six coagulation grids 1-1 connected in series to form a six-stage mechanical stirring tank, and water flows in each coagulation grid 1-1 in sequence; the turbidity detection device 11-2, the granularity detection device 11-3 and the variable-frequency stirrer 13 are arranged in each coagulation lattice 1-1, and the current detector 11-1 is arranged in the last coagulation lattice 1-1; the turbidity detection device 11-2 and the granularity detection device 11-3 are used for detecting turbidity and the size distribution condition of the particles, and the current detector 11-1 is used for detecting the electrical parameters of the particles so as to accurately adjust the dosage. Turbidity detection device, granularity detection device, variable frequency agitator, current detector in this application embodiment are conventional equipment, do not give unnecessary detail to its structure here.

When the device works, the stirring intensity of each stirrer is adjusted according to the types and the water quantities of the added medicaments, the water quality conditions detected by the corresponding turbidity detection devices and the corresponding granularity detection devices so as to realize the optimal coagulation effect, thereby ensuring that the subsequent effluent quality can reach the target level, and being economical and reliable. It should be noted that the correspondence between the type of the chemical, the amount of water, the water quality conditions detected by the turbidity detecting means and the particle size detecting means, and the agitation intensity of each agitator is obtained empirically or by preliminary experiments and stored in the control unit. For the purpose of system optimization, this correspondence can also be adjusted or updated by the control unit.

In particular, a micro-interface generator 12 is further disposed in each of the coagulation lattices 1-1, and the micro-interface generator 12 is connected with an air compressor for generating micro-bubbles. When the micro-interface generator works, the micro-interface generator 12 is controlled to be started according to the water quality conditions detected by the turbidity detection device 11-2 and the granularity detection device 11-3 which are arranged in each coagulation grid 1-1, so that the optimal flocculation effect is achieved, the better tap water outlet can be obtained under the condition of poor water source quality, and the water outlet requirement that the tap water can be directly drunk is met.

In this embodiment, the purpose of providing the micro-interface generator 12 in the coagulation apparatus 1 is to control the particle size of the flocs. When the floc structure is loose and the particles are fine, the micro-interface generator 12 is started to promote the agglomeration of the floc, so that larger alum floc is formed, and the purpose of enhancing the flocculation effect is achieved. When the floc particles are large, the detection effect of the current detector 11-1 can be influenced, and the floc needs to be crushed at this time, so that the particle size of the floc is stabilized in a reasonable range; at this time, the micro-interface generator 12 and the corresponding stirrer are started to form large bubbles, so that a better alum blossom crushing effect is achieved. The specific structure of the micro-interface generator is known to those skilled in the art and will not be described in detail herein.

It should be noted that the sedimentation device may be a radial flow type sedimentation device, a vertical flow type sedimentation device, an inclined plate (tube) type sedimentation device or a horizontal flow type sedimentation device. The inclined plate (pipe) type precipitation device is preferred in the embodiment, because the floc particles are large and uniform and have high precipitation speed after the coagulation is fully carried out by the coagulation grids in the front, and the water production efficiency can be better improved by selecting the inclined plate (pipe) type precipitation device.

In this embodiment, the quartz sand filter chamber adopts modified filter sand, and the modified filter sand is preferably iron oxide modified quartz sand. And fully soaking quartz sand into a ferric chloride solution, and then calcining the quartz sand in a muffle furnace at high temperature to obtain the quartz sand.

The iron oxide modified sand filter has the advantages that: can greatly improve the adsorption performance of the filter sand, and has remarkable effect on the water treatment of the micro-polluted water source with low turbidity and high organic matter content. Compared with the conventional filter sand, the iron oxide modified filter sand has the advantages of high efficiency, easiness in operation, stability, low energy consumption, low pollution, low cost and the like.

In the embodiment, the GAC filter is a granular activated carbon filter, the interior of granular activated carbon has a developed pore structure and a huge specific surface area, and the GAC filter has strong adsorption performance and provides an ideal habitat for microorganisms. The amount of the biological film attached to the granular active carbon is 4-8 times of that of the anthracite and quartz sand filter material; and the removal rate of the GAC filter on ammonia nitrogen is hardly influenced at low temperature, and the removal rate of the GAC filter on AOC can be kept above 80%.

In the embodiment, the BAC filter is a biological activated carbon filter, adopts activated carbon added with ozone to form a biological activated carbon process, and has oxidation and biological treatment effects. The biological activated carbon filtration not only utilizes the huge surface adsorption of the activated carbon and the electrostatic affinity of various groups to further adsorb residual substances in water, but also utilizes microorganisms growing on the biological activated carbon to decompose residual organic substances, ammonia nitrogen and the like in water, thereby ensuring the thoroughness of drinking water treatment, greatly reducing the possibility of generating disinfection byproducts by subsequent chlorine disinfection and increasing the biological stability of the drinking water.

It should be noted that the GAC filter and the BAC filter are optional further filtration treatment devices in the water purification process. And in the working process, whether the GAC filter and the BAC filter are used is determined according to the effluent quality requirement of the target grade and the detected water source quality and/or the effluent quality condition of the quartz sand filter. For example, when the permanganate index of the water quality of the outlet water with the target grade is required to be below 3.0mg/L, if the permanganate index of the water quality of the water source exceeds 6.0mg/L, the GAC filter and the BAC filter need to be started for further filtration treatment. According to experience or experimental data, other conditions for starting the GAC filter and the BAC filter can be set to ensure that the effluent quality can reach the target level.

Referring to fig. 3, the water outlet ends of the quartz sand filter 3, the GAC filter 4 and the BAC filter are respectively connected with a corresponding lifting water tank 15 so as to lift the water level before the advanced treatment, so that sufficient water pressure is available for the advanced treatment, and the water outlet efficiency of the advanced treatment is improved. In some embodiments, the water outlet ends of the quartz sand filter 3, the GAC filter 4 and the BAC filter may share a lifting water tank, and are not limited to this embodiment.

A first ozone column 14-1 is arranged at the upstream of the coagulation device 1, and a second ozone column 14-2 is arranged between the GAC filter 4 and the BAC filter 5; the second ozone column is composed of two ozone columns which are connected in series, and the first ozone column 14-1 and the second ozone column 14-2 form a disinfection unit.

Ozone is a broad-spectrum disinfectant, and the strong oxidation of the ozone can lead various components in microbial cells to generate irreversible changes to die, can effectively inactivate pathogens, protozoa and algae, has quick action and low consumption, and does not leave toxic and harmful substances. Meanwhile, the ozone also has a good removing effect on trace organic matters in the water. The invention combines the first ozone column and the two second ozone columns, and can effectively ensure that the colony number of the discharged water reaches the standard.

In the embodiment, the two ends of the first ozone column 14-1 are also connected with a fifth overtaking pipe 10-5, and the on-off of the fifth overtaking pipe 10-5 is controlled according to the water quality condition of a water source detected by the water quality detection device 11-1. The on-off control mode of the fifth overrunning pipe 10-5 is the existing on-off valve control. When the fifth overrunning pipe 10-5 is in an open state, water from the water source passes through the first ozone column 14-1 and directly enters the coagulation device 1, and when the fifth overrunning pipe 10-5 is in a closed state, water from the water source passes through the first ozone column 14-1 and then enters the coagulation device 1.

Referring to fig. 4, an intermediate water tank 16 is connected to the upstream of the ultrafiltration membrane water purifier 6 and the nanofiltration membrane water purifier 7, and water to be subjected to advanced treatment enters the intermediate water tank 16 in advance and then enters the ultrafiltration membrane water purifier 6 or the nanofiltration membrane water purifier 7 through corresponding on-off valves for treatment, or sequentially passes through the ultrafiltration membrane water purifier 6 and the nanofiltration membrane water purifier 7 for advanced treatment.

The specific working principle is as follows: a first effluent water quality detection device is arranged behind the quartz sand filter 3, and when the corresponding particle detection device and the water quality detection device detect that the effluent water quality of the quartz sand filter 3 meets the effluent water quality requirement of a target grade, the corresponding on-off valve is opened to enable the water output from the quartz sand filter 3 to enter the contact disinfection tank 8; when the corresponding particle detection device and the water quality detection device detect that the effluent quality of the quartz sand filter 3 does not meet the effluent quality requirement of a target grade, the corresponding on-off valve is opened, so that the water output from the quartz sand filter 3 enters the intermediate water tank 16 or the GAC filter 4 for next purification treatment. Whether the water is fed into the intermediate water tank 16 or the GAC filter 4 can be determined by preliminary experiments or experience according to the target water level requirement and the detected water quality parameters.

When the corresponding particle detection device and the water quality detection device detect that the effluent quality of the GAC filter tank 4 meets the effluent quality requirement of a target grade, the corresponding on-off valve is opened, so that the water output from the GAC filter tank 4 enters the contact disinfection tank 8; when the corresponding particle detection device and the water quality detection device detect that the effluent quality of the GAC filter 4 does not meet the effluent quality requirement of a target grade, the corresponding on-off valve is opened, so that the water output from the GAC filter 4 enters the intermediate water tank 16 or the BAC filter 5 for further purification treatment. Whether the water enters the intermediate water tank 16 or the BAC filter 4 in particular can be determined by preliminary experiments or experience according to target effluent level requirements and detected water quality parameters.

When the corresponding particle detection device and the water quality detection device detect that the effluent quality of the BAC filter 5 meets the effluent quality requirement of a target grade, the corresponding on-off valve is opened to enable the water output from the BAC filter 5 to enter the contact disinfection tank 8; when the corresponding particle detection device and the water quality detection device detect that the effluent quality of the BAC filter 5 does not meet the effluent quality requirement of a target grade, the corresponding on-off valve is opened, so that the water output from the BAC enters the intermediate water tank 16 for next purification treatment.

And water in the intermediate water tank 16 is selected to enter the ultrafiltration membrane water purifying device 6 and the nanofiltration membrane water purifying device 7, or sequentially enters the ultrafiltration membrane water purifying device 6 and the nanofiltration membrane water purifying device 7 for advanced treatment. The water outlet ends of the ultrafiltration membrane water purifier 6 and the nanofiltration membrane water purifier 7 are respectively provided with a turbidity monitoring device and a particle detection device, and the two particle detection devices are mainly used for monitoring the membrane wire fracture or membrane element damage condition and repairing in time; the water outlet ends of the ultrafiltration membrane water purifying device 6 and the nanofiltration membrane water purifying device 7 are connected with a contact disinfection tank 8. Particularly, when the tap water production system of the invention is used for producing direct drinking water, preferably, the water in the intermediate water tank 16 sequentially enters the ultrafiltration membrane water purification device 6 and the nanofiltration membrane water purification device 7 so as to achieve the combined effect of a double-membrane process, thereby ensuring that the final quality of the tap water capable of being directly drunk is obtained.

Referring to fig. 3 again, in this embodiment, each ozone column shares one set of ozone generating device 17 and tail gas destruction device 18, liquid oxygen enters the ozone generating device 17 for ozone production reaction, and the generated ozone is divided by a pipeline and then enters each ozone column; tail gas output by the tail gas end of each ozone column flows back to the tail gas destruction device 18 through a pipeline, and ozone in the tail gas is destroyed and then discharged; the structure is simple. Obviously, in some embodiments, different ozone columns may be connected with different ozone generating devices 17 and tail gas destruction devices 18; the present embodiment is not limited.

In the embodiment, each filter is connected with a back flushing gas pipe and a back flushing water pipe, and back flushing gas and back flushing water are simultaneously introduced into the filter when the filter is back flushed, so that the optimal back flushing effect can be achieved, the filtering and purifying effect of the filter is further improved, and the back flushing frequency is reduced. Preferably, the backwashing air pipes of the filter tanks are connected to the same air compressor 19, and the same air compressor 19 provides backwashing air pressure. The air compressor 19 also provides air to each of the micro-interface generators 12. Obviously, in some embodiments, different air compressors 19 may be correspondingly connected to different filter tanks, or an air compressor 19 may be separately provided for each micro-interface generator 12; the present embodiment is not limited.

Example 2.

Referring to fig. 5 and 6, the present embodiment provides an intelligent adaptive tap water production system, which is substantially the same as embodiment 1 except that the second ozone column is omitted. In some embodiments, the first ozone column may also be omitted, or both the first and second ozone columns may be omitted, without being limited to the present embodiment.

Example 3.

Referring to fig. 7, the intelligent self-adaptive tap water production system provided in this embodiment is basically the same as that in embodiment 1, and is different from embodiment 1 in that the system further includes a sewage treatment unit 20, the sewage treatment unit 20 is connected to sludge water discharged from the coagulation device 1 and the sedimentation device 2 and backwash wastewater of each filter, the sludge water and the backwash wastewater are treated by the sewage treatment unit, and then supernatant is taken to flow back to the coagulation device 1 for reuse, so that wastewater discharge is effectively reduced.

The invention provides an intelligent self-adaptive tap water pilot test combined platform, which is mainly innovative in that: the automatic water outlet grade setting device can automatically set the water outlet grade, can automatically adjust the water treatment process flow according to the water quality change of a water source so as to automatically switch and early warn the water outlet grade, and finally tap water obtained by production can meet the requirement of direct drinking water. To better demonstrate the advancement of the present invention, the following validation description is made by several specific running tests.

In the running test, the effluent grade has three target grades, namely A grade, A + grade and A + + grade. The grade A is set according to the limit value of sanitary Standard for Drinking Water (GB 5749-2022), the grade A + is improved by more than 5% in certain indexes than the limit value of sanitary Standard for Drinking Water (GB 5749-2022), and the grade A + + is improved by more than 10% in certain indexes than the limit value of sanitary Standard for Drinking Water (GB 5749-2022).

Run test 1.

The water quality of a water source is selected from a water channel of Tantan in North river, the turbidity of the water quality parameter of the water source is 20 to 80NTU, the pH value is 7 to 7.6, the water temperature is 24 to 35 ℃, the CODMn is 1.5 to 2.1mg/L, the ammonia nitrogen is 0.011 to 0.021mg/L, the nitrate nitrogen is 1.1 to 1.4mg/L, the adding labels of phenol are 0.1, 0.5 and 1mg/L respectively, and the UV254 is 0.026 to 0.035, 0.033 to 0.042 and 0.040 to 0.045mg/L respectively.

The operation process comprises the following steps: setting the grade of the target effluent to be A grade, and performing combined feeding of powdered activated carbon and potassium permanganate under the conditions that the concentrations of three phenols are 0.1, 0.5 and 1.0mg/L respectively. Under the condition that the concentration of phenol is 0.1mg/L, 40mg/L of powdered activated carbon is added, and 0.6mg/L of potassium permanganate is added; under the condition that the concentration of phenol is 0.5mg/L, adding 50mg/L of powdered activated carbon and 0.6mg/L of potassium permanganate; under the condition that the concentration of phenol is 1.0mg/L, 60mg/L of powdered activated carbon is added, and 0.6mg/L of potassium permanganate is added. The operation was continued for 30 days.

Outputting the quality of tap water: during continuous operation, phenol is lower than the detection limit, no odor exists, the effluent indexes all accord with the sanitary Standard for Drinking Water (GB 5749-2022), and part of indexes such as turbidity, permanganate index and the like are superior to the sanitary Standard for Drinking Water (GB 5749-2022).

The water quality can be well adjusted to the target water quality of the set grade A.

Run 2.

The water quality of a water source is selected from a water channel of the Beijiang Tan lake, and the water quality parameters of the water source are as follows: turbidity is 5 to 20NTU, pH is 7.2 to 7.7, water temperature is 16 to 20 ℃, CODMn is 1.3 to 1.8mg/L, ammonia nitrogen is 0.01 to 0.04mg/L, UV254 is 0.025 to 0.027cm-1, thallium (Tl) and antimony (Sb) are respectively added to be 0.2 to 0.4 and 15 to 20 mu g/L.

The operation process comprises the following steps: setting a target water outlet grade to be A + grade, and under the condition that the mass concentrations of water source water Tl and Sb are 0.2-0.4 and 15-20 mu g/L respectively, compositely adding Polymeric Ferric Sulfate (PFS) and a permanganate composite reagent (PPC), controlling the pH value to be 5.6-6.4 during composite adding, controlling the adding amounts of the PPC and the PFS to be more than 3.0 and 40mg/L respectively, and continuously operating for 30 days.

Outputting the quality of tap water: during continuous operation, the Tl content is lower than 0.01 mu g/L, the Sb content is lower than 0.75 mu g/L, the turbidity of the discharged water is within the range of 0.1 to 0.2NTU, and other discharged water indexes all accord with the sanitary Standard for Drinking Water (GB 5749-2022).

The water quality can be well discharged according to the target water quality with the set grade A +.

Run test 3.

The water quality of the water source is selected from a water channel of Beijiang Tan, and the water quality parameters of the water source are as follows: the turbidity is 10 to 25NTU, the pH is 7.3 to 7.6, the water temperature is 17 to 25 ℃, the dissolved oxygen is 7.4 to 10.3mg/L, the ammonia nitrogen is respectively added and marked as 1.5 to 2.5mg/L, the nitrite nitrogen is 0.1 to 0.3mg/L, and the CODMn is 2 to 3mg/L.

The operation process comprises the following steps: setting the target effluent grade as A + + grade, performing biological contact oxidation pretreatment and iron oxide modified filter material reinforced filtration combined treatment under the condition that the ammonia nitrogen concentration is 1.5-2.5 mg/L, and performing two-stage membrane filtration treatment in the advanced treatment process, namely sequentially entering an ultrafiltration membrane water purification device and a nanofiltration membrane water purification device for advanced treatment. The operation was continued for 30 days.

Outputting the quality of tap water: during continuous operation, the effluent ammonia nitrogen and nitrite nitrogen are both lower than the limit of sanitary Standard for Drinking Water (GB 5749-2022) by more than 10 percent, the effluent turbidity is below 0.1NTU, and other effluent indexes all accord with the sanitary Standard for Drinking Water (GB 5749-2022); can be directly drunk.

The water quality can be well discharged according to the target water quality of the set level A + +.

It should be noted that the water outlet level, and the operation process setting of the specific water outlet level, can be adjusted and reset by those skilled in the art according to different actual needs, and are not limited to the above-exemplified a level, a + level, and a + + level.

Furthermore, in the description of the present invention, for the terms of orientation, there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and positional relationship based on that shown in the drawings, merely for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may, explicitly or implicitly, include one or more of that feature, and in the context of this description, "at least" means one or more than one unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present invention, unless otherwise specified and limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.

It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the invention as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims (10)

1. An intelligent self-adaptive tap water production system is characterized by comprising:

the system comprises a conventional treatment unit, a sewage treatment unit and a sewage treatment unit, wherein the conventional treatment unit comprises a coagulation device, a precipitation device, a quartz sand filter, a GAC filter and a BAC filter which are sequentially connected through connecting pipelines;

the advanced treatment unit comprises an ultrafiltration membrane water purification device and a nanofiltration membrane water purification device, wherein the water inlet ends of the ultrafiltration membrane water purification device and the nanofiltration membrane water purification device are respectively connected with the water outlet ends of the quartz sand filter, the GAC filter and the BAC filter through corresponding connecting pipelines, the water outlet ends of the ultrafiltration membrane water purification device and the nanofiltration membrane water purification device are respectively connected with the water outlet end of the contact disinfection tank through corresponding connecting pipelines, and the water outlet end of the ultrafiltration membrane water purification device is also connected with the water inlet end of the nanofiltration membrane water purification device through a connecting pipeline;

the dosing unit comprises a mixing tank positioned at the upstream of the coagulation unit and a dosing device corresponding to the mixing tank, the dosing device is used for adding a plurality of different coagulants, and each different coagulant is independently added and can control the adding amount according to set parameters;

the overrunning unit consists of a plurality of overrunning pipelines, a first overrunning pipeline is arranged between the coagulation device and the water inlet end of the advanced treatment unit, a second overrunning pipeline is arranged between the quartz sand filter tank and the contact disinfection tank, a third overrunning pipeline is arranged between the water outlet end of the GAC filter tank and the contact disinfection tank, and a fourth overrunning pipeline is arranged between the water outlet end of the BAC filter tank and the contact disinfection tank;

the pipeline switching unit is composed of a plurality of on-off valves arranged on each connecting pipeline and on each overrunning pipeline;

the online detection unit comprises a plurality of water quality detection devices, a plurality of turbidity detection devices, a plurality of granularity detection devices and a plurality of current detectors, the water quality detection devices are respectively arranged at a raw water inlet end, a water outlet end of the quartz sand filter, a water outlet end of the GAC filter and a water outlet end of the BAC filter, the turbidity detection devices and the granularity detection devices are respectively arranged at the water outlet end of the precipitation device, the water outlet end of the quartz sand filter, the water outlet end of the GAC filter, the water outlet end of the BAC filter, the water outlet end of the ultrafiltration membrane water purification device and the water outlet end of the nanofiltration membrane water purification device in each coagulation lattice, and the current detectors and the electrical parameters for detecting the particles are arranged in the last coagulation lattice; the parameters detected by the water quality detection device comprise turbidity, pH value, dissolved oxygen, conductivity, temperature, volatile phenol, cadmium and COD _Mn Ammonia nitrogen;

the control unit is in control connection with the online detection unit, the medication administration unit and the pipeline switching unit; the control unit comprises an operation module, a display module and an early warning module, effluent quality parameters of different grades are prestored in the control unit, and the effluent quality parameters of all grades meet the requirements of national standard GB 5749-2022;

when the device works, the outlet water quality grade is selected in advance through the operation module, the control unit controls the dosing unit to automatically dose according to the selected outlet water quality grade and the water source water quality parameter detected by the online detection unit, and controls the pipeline switching unit to automatically switch to form different water treatment flow paths, so that the outlet water quality requirement of a target grade is obtained; when the effluent quality does not meet the effluent quality requirement of the target grade, automatically switching to the effluent quality requirement lower by one grade to operate and sending out an early warning signal; when the effluent quality is restored to the effluent quality requirement of the target grade, automatically switching back to the original grade for operation; when the effluent quality does not meet the lowest-grade effluent quality requirement, a fault signal is sent out to prompt personnel to maintain.

2. The intelligent self-adaptive tap water production system according to claim 1, wherein the coagulation device comprises six coagulation grids connected in series to form a six-stage mechanical stirring tank, and water flows in each coagulation grid in sequence;

and a variable-frequency stirrer is arranged in each coagulation grid, and the stirring intensity of each stirrer is adjusted according to the type and the amount of the added medicament, the water quality conditions detected by the corresponding turbidity detection device and the corresponding granularity detection device during working, so that the subsequent effluent quality can reach the target grade.

3. The intelligent self-adaptive tap water production system according to claim 2, wherein a micro-interface generator is arranged in each coagulation grid, and the micro-interface generator is connected with an air compressor to generate micro-bubbles;

when the device works, the micro-interface generator is controlled to be started according to the water quality conditions detected by the turbidity detection devices and the granularity detection devices arranged in the coagulation grids;

when the turbidity detection device and the granularity detection device detect that the flocs have loose structures and fine particles, the micro-interface generator is started to promote the agglomeration of the flocs, so that larger alum flocs are formed and the flocculation effect is enhanced;

when the turbidity detection device and the granularity detection device detect that floc particles are large, the micro-interface generator and the corresponding stirrer are started to form large bubbles, so that the effects of crushing alum floc and controlling the particle size are achieved.

4. The intelligent adaptive tap water production system according to claim 1, wherein a first ozone column is provided upstream of the coagulation device, and a second ozone column is provided between the GAC filter and the BAC filter; the second ozone column is composed of two ozone columns connected in series, and the first ozone column and the second ozone column jointly form a disinfection unit.

5. The intelligent self-adaptive tap water production system according to claim 4, wherein a fifth overrunning pipe is connected to both ends of the first ozone column, and the first ozone column serves as a pre-oxidation unit;

when the water quality control device works, the on-off of the fifth overrunning pipe is controlled according to the water source water quality condition detected by the water inlet water quality detection device; when the fifth overrunning pipe is in an open state, water at a water source passes through the first ozone column and directly enters the coagulation device, and when the fifth overrunning pipe is in a closed state, the water at the water source passes through the first ozone column and then enters the coagulation device.

6. An intelligent self-adaptive tap water production system according to claim 1, wherein each filter is connected with a back flushing gas pipe and a back flushing water pipe, and back flushing gas and back flushing water are simultaneously introduced into the filter when the filter is back flushed; the back flushing gas of the back flushing gas pipes of the filter tanks is provided by an air compressor.

7. The intelligent self-adaptive tap water production system according to claim 1, further comprising a sewage treatment unit, wherein the sewage treatment unit is connected with sludge water discharged by the coagulation device and the sedimentation device and backwash wastewater of each filter, and the sludge water and the backwash wastewater are treated by the sewage treatment unit and then supernatant is taken to flow back to the coagulation device for reuse.

8. The intelligent self-adaptive tap water production system according to claim 1, wherein the sedimentation device is an inclined plate (pipe) type sedimentation device; the quartz sand filter tank adopts modified filter sand which is ferric oxide modified quartz sand;

and the water outlet ends of the quartz sand filter, the GAC filter and the BAC filter are respectively connected with corresponding lifting water tanks.

9. The intelligent self-adaptive tap water production system according to claim 1, wherein an intermediate water tank is connected to the upstream of the ultrafiltration membrane water purification device and the nanofiltration membrane water purification device, and water to be subjected to advanced treatment is pre-fed into the intermediate water tank and then is selectively fed into the ultrafiltration membrane water purification device and the nanofiltration membrane water purification device through corresponding on-off valves for treatment, or is sequentially subjected to advanced treatment through the ultrafiltration membrane water purification device and the nanofiltration membrane water purification device 7.

10. An intelligent self-adaptive tap water production system according to claim 9, wherein when the corresponding particle detection device and water quality detection device detect that the quality of the effluent water from the quartz sand filter chamber meets the effluent water quality requirement of a target grade, the corresponding on-off valve is opened to allow the water output from the quartz sand filter chamber to enter the contact disinfection tank;

when the corresponding particle detection device and the water quality detection device detect that the effluent water quality of the quartz sand filter does not meet the effluent water quality requirement of a target grade, the corresponding on-off valve is opened, so that the water output from the quartz sand filter enters the intermediate water tank or the GAC filter for next purification treatment;

when the corresponding particle detection device and the water quality detection device detect that the effluent quality of the GAC filter tank meets the effluent quality requirement of a target grade, the corresponding on-off valve is opened, so that the water output from the GAC filter tank enters the contact disinfection tank;

when the corresponding particle detection device and the water quality detection device detect that the effluent water quality of the GAC filter does not meet the effluent water quality requirement of a target grade, the corresponding on-off valve is opened, so that the water output from the GAC filter enters the intermediate water tank or the BAC filter for next purification treatment;

when the corresponding particle detection device and the water quality detection device detect that the effluent quality of the BAC filter chamber meets the effluent quality requirement of a target grade, opening a corresponding on-off valve to enable the water output from the BAC filter chamber to enter the contact disinfection tank;

and when the corresponding particle detection device and the water quality detection device detect that the effluent quality of the BAC filter does not meet the effluent quality requirement of a target grade, opening a corresponding on-off valve to enable the water output from the BAC to enter the intermediate water tank for next purification treatment.

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