CN118545861A - Intelligent ultrapure water quality control system and control method thereof - Google Patents
Intelligent ultrapure water quality control system and control method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Program-control systems
- G05B19/02—Program-control systems electric
- G05B19/04—Program control other than numerical control, i.e. in sequence controllers or logic controllers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
- C02F1/4695—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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Abstract
The invention provides an ultrapure water quality intelligent control system and a control method thereof, wherein the system comprises a multistage filtering unit, a reverse osmosis treatment unit, an electrodeionization purification unit and an ultrapure water tank, wherein the water outlet end of the ultrapure water tank is connected with at least one water supply pipeline; the water supply system further comprises a control unit, a rating unit and at least one monitoring unit, wherein each monitoring unit corresponds to one water supply pipeline and is used for monitoring water quality data of pure water in the water supply pipeline in real time and sending the water quality data to the rating unit; the rating unit is used for receiving the water quality data, carrying out integrated calculation management, rating according to the preset water quality grade and sending the water quality data to the control unit; the control unit is used for executing a backwater program or a water supply program corresponding to the rating result according to the rating result. The invention can monitor the quality of the pure water stored in the ultrapure water tank in real time, and grade the quality of the pure water, so as to carry out targeted reflux purification according to different grading results, thereby improving the purification efficiency and the quality stability of the ultrapure water and reducing the loss of each purification unit.
Description
Technical Field
The application relates to the technical field of ultrapure water treatment, in particular to an ultrapure water quality intelligent control system and a control method thereof.
Background
Ultrapure water is required for biochemical tests and other chemical tests in hospitals, but water used in clinical laboratory in hospitals is intermittent, and the quality of the ultrapure water is not changed for a long time after the ultrapure water is produced. The purity of ultrapure water is gradually reduced, and the consistency of the inspection data is affected by insufficient purity for the clinical laboratory staff. Therefore, it is necessary to monitor the water quality of ultrapure water.
However, most of common water quality monitoring adopts to establish water quality acquisition equipment in the ultrapure water machine, and operating personnel takes out and judges whether the value that gathers on the water quality acquisition equipment accords with the water quality requirement in a certain time, has unable real-time data of reading, unable real-time monitoring water quality information, and the manual judgment precision is relatively poor grade shortcoming.
The intelligent water control system is a system for realizing the intelligent management and control of water resources through a technical means, and can realize the automatic monitoring, regulation and control and management of the water resources, and currently, the intelligent water control system is used for controlling an ultra-pure water machine in the prior art so as to solve the problem that the water quality cannot be monitored in real time.
For example, patent publication No. CN102650859B discloses an intelligent control system and control method for an ultrapure water machine, the system comprises a controller, a touch screen, a water supply pump, a flushing valve, a water taking valve, a water inlet valve, a booster pump, an ultraviolet lamp, a water taking flowmeter, a source water flowmeter, a buzzer, a conductivity transmitter and a resistivity transmitter, an external power supply is respectively connected with the controller, the touch screen, the conductivity transmitter and the resistivity transmitter through transformers, and the touch screen is connected with a control port on the controller to form a touch screen control loop. The intelligent water supply system has the functions of accurately taking water, monitoring water quality, controlling waterways and the like of the touch screen, can realize the accurate automatic water taking of the touch screen through the touch screen, realizes the visual and controllable water treatment and water taking process, monitors the water quality information in real time, stops the machine and alarms if the water quality exceeds a set value, and is convenient for timely processing. However, the invention has no design of re-purification after the water quality exceeds the set value, and can not continuously stabilize the water quality.
For another example, patent publication CN111453885B discloses a real-time monitoring method and system for ultrapure water treatment, the method comprising the steps of: raw water is added: firstly, raw water to be treated passes through a raw water tank of a water adding unit and is led into a filtering unit through a raw water pump to carry out multi-step filtering treatment; raw water dosing: the filtered raw water is led into a solution tank, then the scale inhibitor required by the reaction is added into the solution tank through a dosing pump, and the dosage is measured in real time through a dosing measuring module. The controller records the adding amount of the scale inhibitor of each shift, checks the water yield of the reverse osmosis system during the period with the required adding amount of the scale inhibitor, discharges the scale inhibitor through the transition box according with the standard, and starts the reflux pump when the scale inhibitor does not meet the standard. The water inlet end of the reflux pump is communicated with the three cavities of the transition box through the four-way pipe and the branch pipes, the surface of each branch pipe is provided with an electromagnetic valve, and the water outlet end of the reflux pump is communicated with the filtering unit. The invention can carry out the purification treatment again on the water which does not meet the standard. However, the invention directly returns the water which does not reach the standard to the filtering unit, and the water is subjected to dosing, precise filtering and reverse osmosis filtering again, so that the purification process is numerous and the purification efficiency is low. The water quality is not considered to be classified and judged, and targeted filtration or reverse osmosis purification is carried out according to the water quality grade, so that the purification efficiency is improved.
Therefore, if the ultrapure water quality intelligent control system can be provided, the water quality stability of the ultrapure water can be improved and the purification efficiency can be improved on the basis of real-time monitoring of the water quality, so that the intelligent level of the water quality intelligent control system can be improved more favorably.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides an ultrapure water quality intelligent control system and a control method thereof, so as to solve the problems in the prior art that the existing ultrapure water quality intelligent control system for ultrapure water cannot effectively improve the quality stability of ultrapure water, and the purification efficiency is not high enough.
In order to achieve the above and related objects, the present invention adopts the following technical scheme:
the invention provides an ultrapure water quality intelligent control system, which comprises a multistage filtering unit, a reverse osmosis treatment unit, an electrodeionization purification unit and an ultrapure water tank which are sequentially arranged according to a water purification process, wherein the water outlet end of the ultrapure water tank is connected with at least one water supply pipeline; the system also comprises a control unit, a rating unit and at least one monitoring unit, wherein each monitoring unit corresponds to one water supply pipeline, and the monitoring unit is used for monitoring the water quality data of pure water in the corresponding water supply pipeline in real time and sending the water quality data to the rating unit;
The rating unit is used for receiving the water quality data, carrying out integrated calculation management on the water quality data, rating according to a preset water quality grade, and sending a rating result to the control unit;
the control unit is used for executing a backwater program or a water supply program corresponding to the rating result according to the rating result, wherein the backwater program comprises the step of respectively refluxing pure water with different grades to the multistage filtering unit, the reverse osmosis unit or the electrodeionization purification unit based on the rating result for secondary purification.
In an embodiment of the present application, the preset water quality level includes a first-level water quality, a second-level water quality, a third-level water quality and a fourth-level water quality which are sequentially set from high to low, wherein the first-level water quality is water quality with water quality data meeting the ultra-pure water outlet water quality standard;
The second-level water quality is water quality with water quality data in a second risk interval, and the water quality parameters of the second risk interval comprise conductivity, ion content and microorganism content;
the third-level water quality is water quality with water quality data in a third risk interval, and the water quality parameters of the third risk interval comprise conductivity, ion content, colloid substance, microorganism content, bacteria content, metal substance and dissolved salts;
The fourth grade water quality is water quality with water quality data in a fourth risk interval, and the water quality parameters in the fourth risk interval comprise conductivity, ion content, colloid substance, microorganism content, bacteria content, metal substance, dissolved salt, turbidity, suspended solids and free chlorine.
In an embodiment of the present application, the water return process further includes, when the rating result is the secondary water quality, returning the pure water in the water supply pipeline corresponding to the water supply pipeline to the electrodeionization purification unit for secondary purification;
when the grading result is three-level water quality, the pure water in the water supply pipeline corresponding to the grading result is returned to the reverse osmosis unit, and secondary purification is sequentially carried out;
and when the grading result is the four-stage water quality, the pure water in the water supply pipeline corresponding to the grading result is returned to the multi-stage filtering unit, and secondary purification is sequentially carried out.
In one embodiment of the application, the multi-stage filtration unit comprises a mechanical filter, an activated carbon filter, a softening filter and a precision filter, which are sequentially connected in a pipeline along the water purification process.
In one embodiment of the application, the reverse osmosis unit comprises a primary high-pressure pump, a primary reverse osmosis membrane, a secondary high-pressure pump and a secondary reverse osmosis membrane which are sequentially connected in a pipeline along the water purification process.
In one embodiment of the present application, the system further comprises a balancer disposed between the multistage osmosis unit and the reverse osmosis unit, and when the rated result is three-stage water quality, pure water in the water supply pipeline corresponding to the rated result is returned to the balancer, and is secondarily purified by the reverse osmosis unit and the electrodeionization purification unit in sequence.
In an embodiment of the present application, the water quality parameter in the third risk interval further includes a pH value; the system also comprises a dosing tank, wherein the dosing tank is arranged between the primary reverse osmosis membrane and the secondary reverse osmosis membrane, and a pH adjusting medicament is placed in the dosing tank.
The second aspect of the invention provides an intelligent control method for the water quality of ultrapure water, which uses the intelligent control system for the water quality of ultrapure water to control the water quality, and comprises the following steps:
acquiring water quality data of pure water in a water supply pipeline;
carrying out integrated calculation on the water quality data, and grading according to a preset water quality grade to obtain a grading result;
Executing a water supply program corresponding to the water supply unit based on the grading result to supply water to the appointed water point, or executing a water return program corresponding to the water supply unit, and respectively returning pure water with different grades to the multi-stage filtering unit, the reverse osmosis unit or the electrodeionization purification unit for secondary purification;
and monitoring the water quality after the secondary purification in real time until the grading result meets the ultrapure water outlet water quality standard.
In an embodiment of the application, the method further includes executing the warning program when the water quality data exceeds the fourth risk interval.
In one embodiment of the present application, the warning program includes stopping the operation of the multistage filtration unit, the reverse osmosis unit and the electrodeionization purification unit and prompting the discharge of pure water in the intelligent control system for the quality of ultrapure water.
The beneficial technical effects of the invention are as follows:
The invention can monitor the quality of the pure water stored in the ultrapure water tank in real time and grade the quality of the pure water so as to carry out targeted reflux purification according to different grading results, thereby reducing the loss of each purification unit on the basis of improving the purification efficiency and the quality stability of the ultrapure water.
According to the invention, the water quality data is integrated, calculated and managed, and the rating result is obtained and different backwater programs, water supply programs or warning programs are executed according to the preset water quality grade. The invention judges the secondary water quality, the tertiary water quality and the quaternary water quality as water quality meeting the ultra-pure water outlet water quality standard after limited times of reflux purification, and for the water quality, the invention automatically carries out secondary purification so as to effectively improve the ultra-pure water quality produced by the system. And judging the water quality exceeding the fourth risk interval of the water quality data as serious water quality which does not reach the standard, stopping the machine, and suggesting to discharge the part of pure water so as to avoid multiple invalid secondary purification and greatly consume all equipment in the system.
The invention has higher intelligent degree, can effectively prolong the period of storing pure water in the ultrapure water tank, and can ensure the stability of the produced ultrapure water and meet the requirement of water for medical inspection.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 is a schematic diagram of the system for controlling the quality of ultrapure water.
Reference numerals
1: A mechanical filter; 2: an activated carbon filter; 3: softening the filter; 4: a precision filter; 5: a balancer; 6: a primary high pressure pump; 7: a first-stage reverse osmosis membrane; 8: a second-stage high-pressure pump; 9: a second-stage reverse osmosis membrane; 10: an electrodeionization purification unit; 11: an ultrapure water tank; 12: an ultrapure water delivery pump; 13: a monitoring unit; 14: water is used for spot filling; 15: a control unit; 16: and a rating unit.
Detailed Description
Unless defined otherwise, all technical and/or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable combination or in any other described embodiment of the invention as appropriate. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiments are not operable without those elements. The present invention will be further described with reference to the following specific examples, but it should be understood that the specific process conditions, results, etc. described in the examples of the present invention are only for illustrating the present invention, and are not intended to limit the scope of the present invention, and all equivalent changes or modifications according to the spirit of the present invention should be included in the scope of the present invention.
It should be noted that the electrodeionization purifying unit of the present invention is an EDI device.
The invention provides an ultrapure water quality intelligent control system, which comprises a multistage filtering unit, a reverse osmosis treatment unit, an electrodeionization purification unit 10 and an ultrapure water tank 11 which are sequentially arranged according to a water purification procedure, wherein the water outlet end of the ultrapure water tank 11 is connected with at least one water supply pipeline; the system further comprises a control unit 15, a rating unit 16 and at least one monitoring unit 13, wherein each monitoring unit 13 corresponds to one water supply pipeline, and the monitoring unit 13 is used for monitoring the water quality data of pure water in the corresponding water supply pipeline in real time and sending the water quality data to the rating unit 16;
the rating unit 16 is configured to receive water quality data, perform integrated calculation management on the water quality data, rate according to a preset water quality level, and send a rating result to the control unit 15;
the control unit 15 is configured to execute a water returning program or a water supplying program corresponding to the rating result according to the rating result, where the water returning program includes respectively returning pure water of different grades to the multi-stage filtration unit, the reverse osmosis unit or the electrodeionization purification unit 10 based on the rating result, and performing secondary purification.
In some embodiments, the water quality data monitored by the monitoring unit 13 includes conductivity, ion content, colloidal substances, microbial content, bacterial content, metallic substances, dissolved salts, turbidity, suspended solids, free chlorine, TOC, pH, and the like.
In some embodiments, the preset water quality level comprises a first-level water quality, a second-level water quality, a third-level water quality and a fourth-level water quality which are sequentially arranged from high to low, wherein the first-level water quality is water quality of which the water quality data meets the ultra-pure water outlet water quality standard;
The second-level water quality is water quality with water quality data in a second risk interval, and the water quality parameters of the second risk interval comprise conductivity, ion content and microorganism content;
the third-level water quality is water quality with water quality data in a third risk interval, and the water quality parameters of the third risk interval comprise conductivity, ion content, colloid substance, microorganism content, bacteria content, metal substance and dissolved salts;
The fourth grade water quality is water quality with water quality data in a fourth risk interval, and the water quality parameters in the fourth risk interval comprise conductivity, ion content, colloid substance, microorganism content, bacteria content, metal substance, dissolved salt, turbidity, suspended solids and free chlorine.
In some embodiments, the second, third and fourth risk intervals of the present invention have different ranges of water quality parameters in addition to different water quality parameters. For example, the second risk interval has a conductivity of 0.5 to 3. Mu.S/cm, the third risk interval has a conductivity of 4 to 10. Mu.S/cm, and the fourth risk interval has a conductivity of 11 to 30. Mu.S/cm. Because the different inspection projects have different requirements on the water quality standard of the ultrapure water, the specific numerical range of each water quality parameter of each risk interval is not limited, and the specific numerical range is set based on actual requirements.
In some embodiments, the water return process specifically includes, when the rated result is the secondary water quality, returning the pure water in the water supply pipeline corresponding to the secondary water quality to the electrodeionization purification unit 10 for secondary purification;
when the grading result is three-level water quality, the pure water in the water supply pipeline corresponding to the grading result is returned to the reverse osmosis unit, and secondary purification is sequentially carried out;
and when the grading result is the four-stage water quality, the pure water in the water supply pipeline corresponding to the grading result is returned to the multi-stage filtering unit, and secondary purification is sequentially carried out.
In some embodiments, the water quality parameter of the third risk interval further comprises a pH; the system also comprises a dosing tank, wherein the dosing tank is arranged between the first-stage reverse osmosis membrane 7 and the second-stage reverse osmosis membrane 9 of the reverse osmosis unit, and a pH adjusting medicament is placed in the dosing tank. Since the pH value of ultrapure water decreases after long-term storage or after multiple secondary purifications, it is necessary to add a pH adjusting agent such as NaOH or the like to neutralize the pH value so as to satisfy the ultrapure water effluent quality standard.
In some embodiments, the water supply process specifically includes delivering pure water in the water supply pipe corresponding thereto to the designated water point 14 when the rated result is the primary water quality. In this process, the unused pure water is returned to the ultrapure water tank 11 for continuous storage.
In some embodiments, when the water quality data is determined to be beyond the fourth risk interval after the integrated calculation management, i.e. after the calculation analysis, the current water quality is purified at least twice, and the water quality still cannot meet the ultra-pure water outlet water quality standard, the warning program is executed. The warning program includes stopping the operation of the multistage filtration unit, the reverse osmosis unit and the electrodeionization purification unit 10 and prompting the discharge of pure water in the ultrapure water quality intelligent control system. The warning program of the invention aims to avoid serious loss of equipment such as reverse osmosis membrane and the like, which influence the service life of the equipment, caused by that the water quality still does not reach the standard after multiple purification.
In some embodiments, as shown in fig. 1, the multi-stage filtration unit includes a mechanical filter 1, an activated carbon filter 2, a softening filter 3, and a fine filter 4, which are sequentially line-connected along the water purification process. The system of the present invention further comprises a raw water inlet pipe connected to the water inlet of the mechanical filter 1 for supplying raw water, which may be an unpurified source of tap water or the like.
In some embodiments, the control unit 15, the rating unit 16 and the monitoring unit 13 are electrically connected to each other.
In some embodiments, the reverse osmosis unit comprises a primary high pressure pump 6, a primary reverse osmosis membrane 7, a secondary high pressure pump 8, and a secondary reverse osmosis membrane 9, which are sequentially piped along the water purification process. The system further comprises a balancer 5, wherein the balancer 5 is arranged between the multistage osmosis unit and the reverse osmosis unit, and when the grading result is three-stage water quality, pure water in a water supply pipeline corresponding to the grade is returned to the balancer 5, and is subjected to secondary purification through the reverse osmosis unit and the electrodeionization purification unit 10 in sequence.
In some embodiments, the balancer 5 is a normal pressure container which is in pressure equalizing with the atmosphere, and the balancer 5 is used for temporarily storing water pretreated by the multi-stage filter unit on one hand and providing a stable water inlet source for the reverse osmosis unit so that the water inlet of the reverse osmosis unit is not influenced by the flow fluctuation of the front-end multi-stage filter unit, the water outlet quality is improved, and a better osmosis effect is achieved; on the other hand, the balancer 5 is used as a pure water temporary storage container, and water output by the ultrapure water delivery pump 12 flows back to the balancer 5 through a water return program to purify the reverse osmosis unit and the electrodeionization purification unit 10 again, so that the purity of the final water is further improved, and further, the pure water stored by the ultrapure water tank 11 is effectively ensured to meet the requirement of water for medical inspection when in use.
In some embodiments, a dosing tank is also provided between the primary reverse osmosis membrane 7 and the secondary reverse osmosis membrane 9.
(Not shown in the drawings)
In some embodiments, the ultrapure water delivery pump 12 is arranged on the water supply pipeline, and the ultrapure water tank 11 and the ultrapure water delivery pump 12 are connected through a pipeline to form a first water circulation loop; the electrodeionization purification unit 10 and the ultrapure water delivery pump 12 are connected through a pipeline to form a second water circulation loop; the reverse osmosis unit is connected with the ultrapure water delivery pump 12 through a pipeline to form a third water circulation loop; the multistage osmosis unit is connected with the ultrapure water delivery pump 12 through a pipeline to form a fourth water circulation loop.
In some embodiments, the ultrapure water delivery pump 12 is a variable frequency circulation delivery pump, the flow rate of the pump can be adjusted according to the requirements, the water supply stability is good, and the noise is low.
In some embodiments, the water outlet end of the ultrapure water tank 11 is also provided with a water drain pipe (not shown in the figure).
In other embodiments, the third water circulation loop may further include a plurality of third circulation branches, which are respectively connected to the water inlet ends of the first reverse osmosis membrane 7 and the second reverse osmosis membrane 9.
In other embodiments, the fourth water circulation loop may further include a plurality of fourth circulation branches connected to the water inlet ends of the mechanical filter 1, the activated carbon filter 2, the softening filter 3 and the precision filter 4, respectively.
In some embodiments, as shown in FIG. 1, the water supply pipe connects a plurality of water usage points 14, and a check valve is provided at the water inlet of each water usage point 14. The control unit 15 is electrically connected with the check valve and is used for controlling the opening and closing of the check valve.
In some embodiments, each water circulation loop or circulation branch of the present invention is provided with an automatic valve, and the control unit 15 controls the opening and closing of each automatic valve.
The invention also provides an ultrapure water quality intelligent control method, which uses the ultrapure water quality intelligent control system to control water quality, and comprises the following steps:
acquiring water quality data of pure water in a water supply pipeline;
carrying out integrated calculation on the water quality data, and grading according to a preset water quality grade to obtain a grading result;
Executing a water supply program corresponding to the water supply unit based on the grading result to supply water to the designated water point 14 or executing a water return program corresponding to the water supply unit to respectively reflux pure water with different grades to the multi-stage filtering unit, the reverse osmosis unit or the electrodeionization purification unit 10 for secondary purification;
and monitoring the water quality after the secondary purification in real time until the grading result meets the ultrapure water outlet water quality standard.
In some embodiments, the water quality capable of being subjected to secondary purification by reflux is water quality which is determined to be subjected to primary or secondary reflux purification after integrated calculation, so that the water quality data of the water quality can meet the water quality standard of ultrapure water outlet.
After the integration calculation, judging that the current water quality still cannot meet the water quality standard of the ultrapure water after the current water quality is subjected to reflux purification twice, namely, executing a warning program when the water quality data exceeds a fourth risk interval. In general, when the water quality data exceeds the fourth risk interval, it is indicated that the ultrapure water initially prepared is stored in the ultrapure water tank 11 for a long time, for example, for five days or the like, and the water quality thereof is seriously deteriorated. In this case, it is preferable to drain the current pure water and re-inject the raw water to prepare ultrapure water so as to avoid the growth of more impurities such as bacteria in the system.
In some embodiments, pure water at different water quality grades is returned to the corresponding purification units through water quality grading, so that the purification flow is reduced, and efficient purification is realized.
In some embodiments, the invention screens out effective water quality data by integrating calculations to improve the accuracy of the rating results. The effective water quality data is data corresponding to water quality parameters contained in each risk interval.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The intelligent ultrapure water quality control system comprises a multistage filtering unit, a reverse osmosis treatment unit, an electrodeionization purification unit and an ultrapure water tank which are sequentially arranged according to a water purification procedure, and is characterized in that the water outlet end of the ultrapure water tank is connected with at least one water supply pipeline; the system also comprises a control unit, a rating unit and at least one monitoring unit, wherein each monitoring unit corresponds to one water supply pipeline, and the monitoring unit is used for monitoring the water quality data of pure water in the corresponding water supply pipeline in real time and sending the water quality data to the rating unit;
The grading unit is used for receiving the water quality data, carrying out integrated calculation management on the water quality data, grading according to a preset water quality grade, and sending a grading result to the control unit;
The control unit is used for executing a backwater program or a water supply program corresponding to the grading result according to the grading result, and the backwater program comprises the steps of respectively refluxing pure water with different grades to the multi-stage filtering unit, the reverse osmosis unit or the electrodeionization purification unit based on the grading result for secondary purification.
2. The intelligent ultrapure water quality control system according to claim 1, wherein the preset water quality level comprises a primary water quality, a secondary water quality, a tertiary water quality and a quaternary water quality which are sequentially set from high to low, and the primary water quality is water quality of which water quality data meets the ultrapure water outlet water quality standard;
The secondary water quality is water quality with water quality data in a second risk interval, and the water quality parameters of the second risk interval comprise conductivity, ion content and microorganism content;
The third-level water quality is water quality with water quality data in a third risk interval, and the water quality parameters of the third risk interval comprise conductivity, ion content, colloid substances, microorganism content, bacteria content, metal substances and dissolved salts;
The fourth-level water quality is water quality with water quality data in a fourth risk interval, and the water quality parameters in the fourth risk interval comprise conductivity, ion content, colloid substances, microorganism content, bacteria content, metal substances, dissolved salts, turbidity, suspended matters and free chlorine.
3. The intelligent control system for ultra-pure water quality according to claim 2, wherein the water return program further comprises the step of, when the rated result is the secondary water quality, returning pure water in the water supply pipeline corresponding to the rated result to the electrodeionization unit for secondary purification;
when the grading result is the three-level water quality, the pure water in the water supply pipeline corresponding to the grading result is returned to the reverse osmosis unit, and secondary purification is sequentially carried out;
and when the grading result is the four-stage water quality, the pure water in the water supply pipeline corresponding to the grading result is returned to the multi-stage filtration unit, and secondary purification is sequentially carried out.
4. The intelligent control system for ultra-pure water quality according to claim 1, wherein the multistage filtration unit comprises a mechanical filter, an activated carbon filter, a softening filter and a precision filter which are sequentially connected in a pipeline along the water purification process.
5. The intelligent control system for ultra-pure water quality according to claim 3, wherein the reverse osmosis unit comprises a primary high-pressure pump, a primary reverse osmosis membrane, a secondary high-pressure pump and a secondary reverse osmosis membrane which are sequentially connected in a pipeline along the water purification process.
6. The intelligent control system for ultra-pure water quality according to claim 3, further comprising a balancer disposed between the multistage osmosis unit and the reverse osmosis unit, wherein when the result of the rating is the three-stage water quality, pure water in the water supply pipe corresponding thereto is returned to the balancer, and is secondarily purified by the reverse osmosis unit and the electrodeionization unit in sequence.
7. The intelligent control system for ultra-pure water quality according to claim 5, wherein the water quality parameter of the third risk interval further comprises pH value; the system also comprises a dosing tank, wherein the dosing tank is arranged between the primary reverse osmosis membrane and the secondary reverse osmosis membrane, and a pH adjusting medicament is placed in the dosing tank.
8. An intelligent control method for the quality of ultrapure water, characterized in that the method uses the intelligent control system for the quality of ultrapure water according to any one of claims 1 to 7 for water quality control, the method comprising the steps of:
acquiring water quality data of pure water in a water supply pipeline;
carrying out integrated calculation on the water quality data, and grading according to a preset water quality grade to obtain a grading result;
Executing a water supply program corresponding to the water supply unit based on the evaluation result to supply water to a designated water point, or executing a water return program corresponding to the water supply unit, and respectively returning pure water with different grades to a multi-stage filtering unit, a reverse osmosis unit or an electrodeionization purification unit for secondary purification;
and monitoring the water quality after the secondary purification in real time until the grading result meets the ultrapure water outlet water quality standard.
9. The intelligent control method for the quality of ultrapure water according to claim 8, further comprising executing a warning program when the quality data exceeds the fourth risk interval.
10. The method according to claim 9, wherein the warning program includes stopping the operation of the multistage filtration unit, the reverse osmosis unit and the electrodeionization purification unit and prompting the discharge of pure water in the ultrapure water quality intelligent control system.
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