CN206512007U - water purification system - Google Patents
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- CN206512007U CN206512007U CN201621281842.XU CN201621281842U CN206512007U CN 206512007 U CN206512007 U CN 206512007U CN 201621281842 U CN201621281842 U CN 201621281842U CN 206512007 U CN206512007 U CN 206512007U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 450
- 238000000746 purification Methods 0.000 title claims abstract description 74
- 239000002351 wastewater Substances 0.000 claims abstract description 90
- 239000012528 membrane Substances 0.000 claims abstract description 80
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 78
- 239000012141 concentrate Substances 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 238000011010 flushing procedure Methods 0.000 description 7
- 230000010287 polarization Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The utility model provides a water purification system, which comprises a concentrated water discharge control unit, wherein the concentrated water discharge control unit comprises a first branch, a second branch and a wastewater ratio component; the water outlet end of the first branch is connected with the water inlet pipeline, and a first electromagnetic valve is arranged on the first branch; the water outlet end of the second branch is connected with the water outlet section of the concentrated water pipeline or is directly emptied, and the second branch is provided with a second electromagnetic valve; the water inlet end of the first branch and the water inlet end of the second branch are connected to a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve through a wastewater ratio component. Through controlling the first solenoid valve on the second branch road and the second solenoid valve on the second branch road discontinuous switch, realize the intermittent type formula backward flow of dense water, reduce dense water and discharge, improve water purification system's rate of recovery, owing to be intermittent type, can regulate and control the dense water backward flow simultaneously, but greatly reduced reverse osmosis membrane's pressure avoids its life to shorten.
Description
Technical Field
The utility model relates to a water purification technology field especially relates to a water purification system.
Background
The traditional water purification system has the defects of low recovery rate and large concentrated water discharge amount. In order to realize the water-saving effect of the water purification system, the water purification system with high recovery rate generally adopts the process of reducing the discharge of concentrated water or refluxing the concentrated water to improve the recovery rate, and although the two water treatment processes improve the recovery rate to a certain extent and achieve the aim of saving water, the discharge of the concentrated water or the concentrated water is directly reducedThe water flows back completely, the surface of the reverse osmosis membrane can generate serious concentration polarization, if CaCO on the surface of the reverse osmosis membrane cannot be disturbed in time3The formation of small crystal nucleus can scale the surface of the reverse osmosis membrane, the pollution speed is relatively accelerated, the performance attenuation of the reverse osmosis membrane is accelerated, the service life is shortened rapidly, and the unreasonable use of the reverse osmosis membrane is caused.
SUMMERY OF THE UTILITY MODEL
Therefore, a water purification system is needed to solve the problem of unreasonable use of the reverse osmosis membrane of the traditional water purification system.
The utility model provides a water purification system, which comprises a pretreatment unit and a reverse osmosis membrane treatment unit, wherein the pretreatment unit and the reverse osmosis membrane treatment unit are respectively connected with two ends of a water inlet pipeline, a concentrated water outlet of the reverse osmosis membrane treatment unit is connected with a concentrated water pipeline, and a concentrated water discharge electromagnetic valve is arranged on the concentrated water pipeline; the water purification system also comprises a concentrated water discharge control unit, wherein the concentrated water discharge control unit comprises a first branch, a second branch and a wastewater ratio component;
the water outlet end of the first branch is connected with the water inlet pipeline, and a first electromagnetic valve is arranged on the first branch;
the water outlet end of the second branch is connected with the water outlet section of the concentrated water pipeline or is directly emptied, and the second branch is provided with a second electromagnetic valve;
the water inlet end of the first branch and the water inlet end of the second branch are connected to a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve through a wastewater ratio component.
In one embodiment, the concentrated water discharge control unit further comprises a third branch, the water inlet end of the third branch is connected to a concentrated water pipeline between the concentrated water outlet of the reverse osmosis membrane treatment unit and the concentrated water discharge electromagnetic valve, the water outlet end of the third branch is connected to the water outlet section of the concentrated water pipeline or is directly emptied, and a third wastewater ratio is set on the third branch.
In one embodiment, the wastewater ratio assembly comprises a first wastewater ratio, the water inlet end of the first branch and the water inlet end of the second branch are connected to the water outlet end of the first wastewater ratio, and the water inlet end of the first wastewater ratio is connected to a concentrate pipeline between a concentrate outlet of the reverse osmosis membrane treatment unit and a concentrate discharge solenoid valve.
In one embodiment thereof, the waste water ratio assembly comprises a first waste water ratio and a second waste water ratio;
the water inlet end of the first branch is connected with the water inlet end of the first wastewater ratio, and the water inlet end of the first wastewater ratio is connected with a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve;
the water inlet end of the second branch is connected with the water outlet end of the second wastewater ratio, and the water inlet end of the second wastewater ratio is connected with a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve.
In one embodiment, a pressure stabilizing pump is further arranged on a water inlet pipeline between the pretreatment unit and the reverse osmosis membrane treatment unit, and a connection point of the water outlet end of the first branch and the water inlet pipeline is arranged between the pretreatment unit and the pressure stabilizing pump.
In one embodiment, the water purification system further comprises a control center, and the control center is in signal connection with the concentrated water discharge solenoid valve, the first wastewater ratio, the second solenoid valve and the second wastewater ratio.
According to the water purification system and the control method thereof, the water purification system further comprises a concentrated water discharge control unit, and the concentrated water discharge control unit comprises a first branch and a second branch; the first branch road can flow back the dense water in the dense water pipeline to the inlet tube in, the second branch road can discharge the dense water in the dense water pipeline, through controlling the first solenoid valve on the second branch road and the second solenoid valve on the second branch road and being interrupted the switch, realize the intermittent type formula backward flow of dense water, reduce the dense water and discharge, improve water purification system's rate of recovery, simultaneously because be at the bottom of the intermittent type, can regulate and control ground dense water backward flow, but greatly reduced reverse osmosis membrane's pressure avoids its life to shorten. The proportion of pure water to concentrated water of the traditional water purification system is generally 1: 3, the water purification system and the control method thereof can realize that the proportion of pure water to concentrated water reaches 2: 1, simultaneously, the service life of the reverse osmosis membrane is prolonged to 20-24 months from the original 8-12 months.
The water purification system realizes the flushing of the water purification system by opening the intermittent concentrated water discharge electromagnetic valve, and the CaCO is disturbed3The formation of small crystal nuclei slows down the scale formation on the surface of the reverse osmosis membrane and prolongs the service life of the reverse osmosis membrane.
The water purification system adopts a mode of combining intermittent concentrated water backflow and intermittent flushing, so that the water quantity entering the reverse osmosis membrane is increased, and the reverse osmosis membrane is flushed in time, so that the discharge of concentrated water can be reduced, the concentration polarization of the reverse osmosis membrane can be slowed down, and the service life of the water purification system is prolonged; meanwhile, the intermittent type concentrated water backflow and the intermittent type flushing can realize that the front pressure of the reverse osmosis membrane is relatively stable, and the service performance of the reverse osmosis membrane can be effectively protected.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a front view of a first embodiment of a water purification system of the present invention;
FIG. 2 is a front view of a second embodiment of the water purification system of the present invention;
FIG. 3 is a front view of a third embodiment of the water purification system of the present invention;
wherein,
111-a water inlet pipe; 112-a concentrate pipeline; 113-pure water pipeline; 114-high pressure water pipe;
121-a pressure relief valve; 122-water quality detection element; 123-low voltage switch; 124-water inlet electromagnetic valve; 125-concentrated water discharge electromagnetic valve; 126-a pressure maintaining pump; 127-a check valve; 128-high voltage switch; 129-pressure tank;
210-a first stage filter element; 220-second stage filter element;
300-a reverse osmosis membrane treatment unit;
410-a first branch; 411-first wastewater ratio; 412-a first solenoid valve;
420-a second branch; 421-second wastewater ratio; 422-a second solenoid valve;
430-third branch; 431-third wastewater ratio;
500-a post-processing unit;
600-water tap.
Detailed Description
In order to make the technical solution of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, a water purification system according to a first embodiment of the present invention includes a pretreatment unit, a reverse osmosis membrane treatment unit 300, a concentrated water discharge control unit, a post-treatment unit 500, a pressure tank 129, a faucet 600, and a control center (not shown).
Wherein, the pretreatment unit, the reverse osmosis membrane treatment unit 300 and the post-treatment unit 500 are connected in series in sequence; the pure water outlet of the reverse osmosis membrane treatment unit 300 is connected to the pressure tank 129 through a high-pressure water pipe 114, and is connected to the post-treatment unit 500 through a pipe, the post-treatment unit 500 is connected to the faucet 600 through a pure water pipe 113, a check valve 127 is provided on the pure water pipe 113 to prevent the pure water from flowing back, and the concentrated water outlet of the reverse osmosis membrane treatment unit 300 is connected to a concentrated water pipe 112.
Wherein, a pressure reducing valve 121 is arranged on the raw water pipeline for the raw water to enter the pretreatment unit, a water quality detecting element 122, a low pressure switch 123, a water inlet electromagnetic valve 124 and a pressure stabilizing pump 126 are sequentially arranged on the water inlet pipeline 111 between the pretreatment unit and the reverse osmosis membrane treatment unit 300, a high pressure switch 128 is arranged on the high pressure water pipeline 114, and a concentrated water discharging electromagnetic valve 125 is arranged on the concentrated water pipeline 112.
Wherein, the concentrated water discharge control unit comprises a first branch 410, a second branch 420 and a clean water ratio component.
The water inlet end of the first branch 410 is connected to the water outlet end of the clean water ratio component, the water outlet end of the first branch 410 is connected to the water inlet pipe 111, preferably to the water inlet pipe 111 between the water inlet solenoid valve 124 and the pressure stabilizing pump 126, and the first branch 410 is further provided with a first solenoid valve 412.
The water inlet end of the second branch 420 is connected to the water outlet end of the pure water ratio component, the water outlet section of the second branch 420 is connected to the water outlet section of the concentrated water pipeline 112 or is directly emptied, and the second branch 420 is provided with a second electromagnetic valve 422.
The inlet end of the waste water ratio module, which comprises a first waste water ratio 411 in this embodiment, is connected to the concentrate pipe 112 between the concentrate outlet of the reverse osmosis membrane treatment unit 300 and the concentrate discharge solenoid valve 125.
The control center is used for controlling the water purification system to work according to a preset mode, and is in signal connection with the pressure reducing valve 121, the water quality detection element 122, the low-pressure switch 123, the water inlet electromagnetic valve 124, the concentrated water discharge electromagnetic valve 125, the pressure stabilizing pump 126, the high-pressure switch 128, the first electromagnetic valve 412 and the second electromagnetic valve 422. Signal connections include, but are not limited to, electrical connections, wireless connections, wired connections.
The pretreatment unit comprises a first-stage filter element 210 and a second-stage filter element 220, wherein the first-stage filter element 210 is activated carbon, and the second-stage filter element 220 is an ultrafiltration membrane.
As another practical way, the pretreatment unit includes a first-stage filter element 210 and a second-stage filter element 220, wherein the first-stage filter element 210 is an ultrafiltration membrane, and the second-stage filter element 220 is activated carbon. The first-stage filter element 210 can intercept most of the foreign matters in the raw water, protect other filter elements at different stages and prolong the service life of the filter elements.
As an implementation manner, the pretreatment unit includes a first stage filter element 210, a second stage filter element 220, and a third stage filter element, and the filter elements of the first stage filter element 210, the second stage filter element 220, and the third stage filter element may be selected from any one of an activated carbon filter element, a carbon rod filter element, and a PP cotton filter element.
As a practical way, the post-treatment unit 500 may be a PP cotton filter element, a composite filter element, which is used to further treat the pure water stored in the pressure tank 129 or the pure water delivered by the reverse osmosis membrane unit to remove bacteria and odor.
The water quality detecting element 122 is a Total Dissolved Solids (TDS) detecting element. TDS indicates the content of dissolved solids in the water, with higher TDS indicating more impurities in the water.
As one practical way, the water quality detecting element 122 is a conductivity testing element.
As an implementation manner, the water purification system further includes a second purified water pipeline, and a water inlet end of the second purified water pipeline is connected to the water inlet pipeline 111 between the water inlet solenoid valve 124 and the first branch 410. The water outlet of the second water purification pipeline is connected to the faucet 600, and raw water enters the faucet 600 after being treated by the pretreatment unit for use by a user.
Referring to fig. 1, raw water enters the water purification system through the raw water inlet, is treated by the first stage filter element 210 and the second stage filter element 220 of the pretreatment unit, and enters the reverse osmosis membrane treatment unit 300 through the water inlet pipe 111, wherein the water quality data flowing through the water inlet pipe 111 is detected by the water quality detection element 122 of the water inlet pipe 111 and is transmitted to the control center. The water introduced into the reverse osmosis membrane treatment unit 300 is treated into pure water and concentrated water. Pure water, or after being processed by the post-processing unit 500, enters the faucet 600 through the pure water pipeline 113 for the user to use; or into the pressure tank 129 via the high pressure water pipe 114, wherein the high pressure switch 128 on the high pressure water pipe 114 is used for detecting the water pressure condition of the high pressure water pipe 114 and transmitting the detected water pressure condition to the control center. The concentrated water is discharged from the water purification system through the concentrated water pipe 112, intermittently flows back to the water inlet pipe 111 through the first branch 410, or intermittently discharged from the water purification system through the second branch 420.
Correspondingly, the utility model provides an above-mentioned water purification system's control method, including following step:
s100: when the water purification system is powered on, the concentrated water discharge electromagnetic valve 125 is controlled to be opened for a seconds and then closed, and the water purification system enters a water production mode;
specifically, when the water purification system is powered on, the control center controls the water inlet electromagnetic valve 124 and the concentrated water discharge electromagnetic valve 125 to be opened, raw water sequentially passes through the pressure reducing valve 121, the first stage filter element 210, the second stage filter element 220 and the pressure stabilizing pump 126 and enters the reverse osmosis membrane treatment unit 300, all concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 is discharged out of the system through the concentrated water pipeline 112, after a seconds, the concentrated water discharge electromagnetic valve 125 is controlled to be closed, and the water purification system enters a water production mode.
S200: when the water purification system produces water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
the first operation mode is to control the second electromagnetic valve 422 to be opened for b seconds and then to be closed, and the second operation mode is to control the first electromagnetic valve 412 to be opened for c seconds and then to be closed;
specifically, the control center controls the second electromagnetic valve 422 to open, enters the first operation mode, and the concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 sequentially flows through the first wastewater ratio 411 of the first branch 410 and the second branch 420 to be discharged out of the system. At this time, since the concentrated water needs to pass through the first wastewater ratio 411, a certain pressure difference is generated between the inside and the outside of the reverse osmosis membrane, and the reverse osmosis membrane treatment unit 300 can produce a certain amount of pure water. The amount of pure water prepared is related to the first wastewater ratio 411, and preferably, the first wastewater ratio 411 is 150-600 cc.
After b seconds, the second electromagnetic valve 422 is controlled to be closed, the first electromagnetic valve 412 is controlled to be opened, the reverse osmosis membrane treatment unit 300 enters the second operation mode, and the concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 flows through the first branch 410 to enter the water inlet pipeline 111 and enters the reverse osmosis membrane treatment unit 300 again for treatment.
After c seconds, the first solenoid valve 412 is controlled to be closed, the second solenoid valve 422 is controlled to be opened, and the first operation mode is entered.
As above, the water purification system is cycled between the first mode of operation and the second mode of operation.
When the water purification system is in the first mode of operation, the raw water is divided into pure water and concentrated water after being treated, the pure water is used by the user, the concentrated water is discharged, and the ratio of the pure water to the concentrated water is determined by the first wastewater ratio 411.
When the water purification system is in the second operation mode, raw water is divided into pure water and concentrated water after being treated, the pure water is used by users, the concentrated water flows back to the water inlet pipeline 111 and is treated and utilized again, and the recovery rate is improved.
The water purification system circulates between the first operation mode and the second operation mode during water production, concentrated water backflow is intermittently performed, discharge of concentrated water is reduced, concentration polarization on the surface of the reverse osmosis membrane caused by continuous backflow is avoided, and the service life of the reverse osmosis membrane is prolonged.
Note that a > 0, b > 0, and c > 0.
As an implementable manner, when the water purification system produces water, the concentrated water discharge solenoid valve 125 is controlled to be opened at the same time, so that the concentrated water pipeline 112 can discharge concentrated water with a certain flow rate, the discharge flow rate of the concentrated water is increased, the concentrated tea polarization of the reverse osmosis membrane is reduced, and the attenuation of the reverse osmosis membrane is slowed down.
At this time, when the water purification system is in the first operation mode, the raw water is separated into pure water and concentrated water after being treated, the pure water is used by a user, the concentrated water is discharged, and the ratio of the pure water to the concentrated water is determined by the first wastewater ratio 411.
When the water purification system is in the second operation mode, raw water is processed and then divided into pure water and concentrated water, the pure water is used by a user, and a part of the concentrated water flows back to the water inlet pipeline 111 and is processed and utilized again, so that the recovery rate is improved; another part of the concentrated water is discharged, and the ratio of pure water to concentrated water is determined by the first wastewater ratio 411 and the flow rate of the concentrated water discharging solenoid valve 125.
As an implementable manner, the control method further includes the steps of:
s300: after the water purification system continuously produces water for d hours, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, and the concentrated water discharge electromagnetic valve 125 is controlled to be opened for e seconds and then closed;
specifically, after the water purification system continuously produces water for d hours, the control center controls the first electromagnetic valve 412 and the second electromagnetic valve 422 to be closed, so that the water purification system exits the water production mode; and (4) controlling the concentrated water discharge electromagnetic valve 125 to be opened, enabling the water purification system to enter a flushing mode, discharging all concentrated water out of the system through the concentrated water pipeline 112, after e seconds, controlling the concentrated water discharge electromagnetic valve 125 to be closed, and enabling the water purification system to enter a water production mode or be closed again.
After a period of continuous water production, the surface of the reverse osmosis membrane can generate certain concentration polarization, in addition, certain CaCO3 crystal nuclei also exist, and all the concentrated water is discharged out of the system through the concentrated water pipeline 112 after a period of intermittent-continuous water production, so that the concentration polarization can be eliminated in time, the CaCO3 crystal nuclei on the surface of the reverse osmosis membrane are washed away, the scaling on the surface of the reverse osmosis membrane is avoided, and the attenuation of the reverse osmosis membrane is delayed.
Note that d > 0 and e > 0.
As an implementable manner, the control method further includes the steps of:
s400: when the pressure value of the pressure barrel 129 is greater than the first preset pressure value, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, and the concentrated water discharge electromagnetic valve 125 is controlled to be opened for f seconds and then closed;
specifically, the high-pressure switch 128 is provided on the high-pressure water pipe 114, and is capable of detecting the pressure value of the high-pressure water pipe 114, and since the high-pressure water pipe 114 is communicated with the pressure tank 129, the pressure value of the high-pressure water pipe 114 is the pressure value of the reaction pressure tank 129.
The high-pressure switch 128 transmits the detected pressure value to the control center, when the control center judges that the detected pressure value is greater than a first preset pressure value, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, the concentrated water discharge electromagnetic valve 125 is controlled to be opened, the water purification system enters a flushing mode, all concentrated water is discharged out of the system through the concentrated water pipeline 112, after f seconds, the concentrated water discharge electromagnetic valve 125 is controlled to be closed, and the water purification system enters the water production mode or is closed again.
Note that f > 0.
Preferably, the first preset pressure value is smaller than or equal to the pressure value when the pressure barrel 129 is full of water.
As an implementable manner, the control method further includes the steps of:
s400': when the pressure value of the pressure barrel 129 is smaller than a second preset pressure value, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, and the concentrated water discharge electromagnetic valve 125 is controlled to be opened for g seconds and then closed;
specifically, the high-voltage switch 128 transmits the detected pressure value to the control main board control center, when the control center determines that the detected pressure value is smaller than a second preset pressure value, for example, after the water in the pressure tank 129 is used by a user through the unit and the faucet 600, the water amount of the pressure tank 129 is reduced, the pressure is reduced, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, the concentrated water discharge electromagnetic valve 125 is controlled to be opened, the water purification system enters a flushing mode, all the concentrated water is discharged out of the system through the concentrated water pipeline 112, and after g seconds, the concentrated water discharge electromagnetic valve 125 is controlled to be closed, and the water purification system enters the water production mode again.
Note that g is more than or equal to 0; i.e. g may be zero, i.e. when it is detected that the pressure value of the pressure barrel 129 is less than the second preset pressure value, flushing may not be performed.
Preferably, the second preset pressure value is smaller than or equal to the first preset pressure value of the pressure barrel 129.
As an alternative embodiment, the sizes of a, b, c, d, e, f and g are adjusted according to the raw water quality parameters. For example: when TDS is less than 200ppm, setting a to 30, b to 10, c to 110, d to 8, e to 30, f to 30, and g to 10; when 200ppm < TDS < 500ppm, setting a as 30, b as 15, c as 105, d as 8, e as 30, f as 30 and g as 10; when TDS is greater than 500ppm, a is 30, b3 is 20, c is 100, d is 8, e is 30, f is 30, and g is 10.
Preferably, the raw water quality parameter is TDS or turbidity value. The raw water quality parameter is measured by the water quality detecting element and transmitted to the control center.
As an alternative embodiment, when the raw water quality parameter is TDS, the adjusting method according to the raw water quality parameter is as follows:
when TDS < Xppm, the first mode of operation includes controlling the second solenoid valve 422 to open b1Closed after seconds, and the second mode of operation includes controlling the first solenoid valve 412 to open c1Closing after second;
when Xppm is less than or equal to TDS and less than Y ppm, the first operation mode comprises controlling the second electromagnetic valve 422 to open b2Closed after seconds, and the second mode of operation includes controlling the first solenoid valve 412 to open c2Closing after second;
when TDSAt Y ppm or more, the first operating mode includes controlling the second solenoid valve 422 to open b3Closed after seconds, and the second mode of operation includes controlling the first solenoid valve 412 to open c3Closing after second;
wherein X is more than 0 and less than Y, and b is more than 0 and less than b1＜b2＜b3，0＜c3＜c2＜c1。
For example, the water purification system is preset with X200 ppm, Y500 ppm, b 110, b2 15, b3 20, c1 110, c2 105, and c3 100s, that is, the system is applicable to water purification systems
When the TDS is less than 200ppm, the first operation mode comprises controlling the second electromagnetic valve 422 to be opened for 10 seconds and then closed, and the second operation mode comprises controlling the first electromagnetic valve 412 to be opened for 110 seconds and then closed;
when TDS is more than or equal to 200ppm and less than 500ppm, the first operation mode comprises controlling the second electromagnetic valve 422 to be opened for 15 seconds and then closed, and the second operation mode comprises controlling the first electromagnetic valve 412 to be opened for 105 seconds and then closed;
when the TDS is more than or equal to 500ppm, the first operation mode comprises controlling the second electromagnetic valve 422 to be opened for 20 seconds and then closed, and the second operation mode comprises controlling the first electromagnetic valve 412 to be opened for 100 seconds and then closed.
That is, as the TDS increases, the time for discharging the concentrate through the second branch 420 increases, and the time for recovering the concentrate through the first branch 410 decreases.
Example two
Referring to fig. 2, a difference between the second embodiment and the first embodiment of the present invention is that the concentrated water discharge control unit further includes a third branch 430, a water inlet end of the third branch 430 is connected to the concentrated water pipeline 112 between the concentrated water outlet of the reverse osmosis membrane treatment unit 300 and the concentrated water discharge solenoid valve 125, a water outlet end of the third branch 430 is connected to a water outlet section of the concentrated water pipeline 112 or is directly emptied, and the third branch 430 is provided with a third wastewater ratio 431.
Correspondingly, the utility model provides an above-mentioned water purification system's control method lies in with embodiment one's difference:
s200: when the water purification system produces water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
the first operation mode is to control the second electromagnetic valve 422 to be opened for b seconds and then to be closed, and the second operation mode is to control the first electromagnetic valve 412 to be opened for c seconds and then to be closed;
specifically, the control center controls the second electromagnetic valve 422 to open, and enters the first operation mode, a part of the concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 sequentially flows through the first wastewater ratio 411 of the first branch 410 and the second branch 420 to be discharged out of the system, and the other part of the concentrated water flows through the third wastewater ratio 431 of the third branch 430 to be discharged out of the system. In this case, since the concentrated water needs to pass through the first wastewater ratio 411 and the third wastewater ratio 431, a certain pressure difference is generated between the inside and the outside of the reverse osmosis membrane, and the reverse osmosis membrane treatment unit 300 can produce a certain amount of pure water. The amount of pure water prepared is related to the first wastewater ratio 411 and the third wastewater ratio 431, and preferably, the first wastewater ratio 411 is 150-600cc, and the third wastewater ratio 431 is 100-200 cc.
After b seconds, the second electromagnetic valve 422 is controlled to be closed, the first electromagnetic valve 412 is controlled to be opened, the reverse osmosis membrane treatment unit 300 enters the second operation mode, a part of concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 flows through the first branch 410, enters the water inlet pipeline 111, enters the reverse osmosis membrane treatment unit 300 again for treatment, and the other part of concentrated water flows through the third wastewater ratio 431 of the third branch 430 and is discharged out of the system.
After c seconds, the first solenoid valve 412 is controlled to be closed, the second solenoid valve 422 is controlled to be opened, and the first operation mode is entered.
As above, the water purification system is cycled between the first mode of operation and the second mode of operation.
When the water purification system is in the first operation mode, raw water is processed and then divided into pure water and concentrated water, the pure water is used by a user, the concentrated water is discharged, and the proportion of the pure water to the concentrated water is determined by the first wastewater ratio 411 and the third wastewater ratio 431.
When the water purification system is in the second operation mode, raw water is processed and then divided into pure water and concentrated water, the pure water is used by a user, a part of concentrated water flows back to the water inlet pipeline 111 and is processed and utilized again, the recovery rate is improved, the other part of concentrated water is discharged out of the system through the third branch 430, and the proportion of the pure water to the concentrated water is determined by the first wastewater ratio 411 and the third wastewater ratio 431.
In this embodiment, the third waste water ratio 431 of the third branch 430 is a normally open waste water ratio to increase the amount of waste water discharged out of the system, reduce the concentration polarization of the reverse osmosis membrane, and slow down the attenuation of the reverse osmosis membrane.
EXAMPLE III
Referring to fig. 3, a third embodiment of the present invention is different from the second embodiment in that the wastewater ratio module of the concentrated water discharge control unit further includes a second wastewater ratio 421.
The water inlet end of the first branch 410 is connected with the water outlet end of the first wastewater ratio 411, and the water inlet end of the first wastewater ratio 411 is connected with the concentrated water pipeline 112 between the concentrated water outlet of the reverse osmosis membrane treatment unit 300 and the concentrated water discharging solenoid valve 125; the water inlet end of the second branch 420 is connected to the water outlet end of the second waste water ratio 421, and the water inlet end of the second waste water ratio 421 is connected to the concentrate pipeline 112 between the concentrate outlet of the reverse osmosis membrane treatment unit 300 and the concentrate discharge solenoid valve 125. The wastewater ratios of the second wastewater ratio 421 and the second wastewater ratio 411 may be the same or different.
Correspondingly, the utility model provides an above-mentioned water purification system's control method lies in with embodiment one's difference:
s200: when the water purification system produces water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
the first operation mode is to control the second electromagnetic valve 422 to be opened for b seconds and then to be closed, and the second operation mode is to control the first electromagnetic valve 412 to be opened for c seconds and then to be closed;
specifically, the control center controls the second electromagnetic valve 422 to open, and enters the first operation mode, a part of the concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 sequentially flows through the second wastewater ratio 421 of the second branch 420 to be discharged out of the system, and the other part of the concentrated water flows through the third wastewater ratio 431 of the third branch 430 to be discharged out of the system. In this case, since the concentrated water needs to pass through the second waste water ratio 421 and the third waste water ratio 431, a constant pressure difference is generated between the inside and the outside of the reverse osmosis membrane, and the reverse osmosis membrane treatment unit 300 can produce a constant amount of pure water. The amount of pure water prepared is related to the first wastewater ratio 411, the second wastewater ratio 421, and the third wastewater ratio 431.
After b seconds, the second electromagnetic valve 422 is controlled to be closed, the first electromagnetic valve 412 is controlled to be opened, the reverse osmosis membrane treatment unit 300 enters the second operation mode, a part of concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 flows through the first branch 410, enters the water inlet pipeline 111, enters the reverse osmosis membrane treatment unit 300 again for treatment, and the other part of concentrated water flows through the third wastewater ratio 431 of the third branch 430 and is discharged out of the system.
After c seconds, the first solenoid valve 412 is controlled to be closed, the second solenoid valve 422 is controlled to be opened, and the first operation mode is entered.
As above, the water purification system is cycled between the first mode of operation and the second mode of operation.
When the water purification system is in the first operation mode, raw water is processed and then divided into pure water and concentrated water, the pure water is used by a user, the concentrated water is discharged, and the proportion of the pure water to the concentrated water is determined by the second wastewater ratio 421 and the third wastewater ratio 431.
When the water purification system is in the second operation mode, raw water is processed and then divided into pure water and concentrated water, the pure water is used by a user, a part of concentrated water flows back to the water inlet pipeline 111 and is processed and utilized again, the recovery rate is improved, the other part of concentrated water is discharged out of the system through the third branch 430, and the proportion of the pure water to the concentrated water is determined by the first wastewater ratio 411 and the third wastewater ratio 431.
In this embodiment, the first branch 410 and the second branch 420 are respectively provided with a first wastewater ratio 411 and a second wastewater ratio 421, and different wastewater ratio devices are adopted for the wastewater ratios of the first branch 410 and the second branch 420, so that the sizes of the first wastewater ratio 411 and the second wastewater ratio 421 can be flexibly adjusted, and the flow of the intermittently recycled concentrated water can be more flexibly adjusted.
In the above description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. A water purification system comprises a pretreatment unit and a reverse osmosis membrane treatment unit (300), wherein the pretreatment unit and the reverse osmosis membrane treatment unit (300) are respectively connected with two ends of a water inlet pipeline (111), a concentrated water outlet of the reverse osmosis membrane treatment unit (300) is connected with a concentrated water pipeline (112), and a concentrated water discharge electromagnetic valve (125) is arranged on the concentrated water pipeline (112); the water purification system is characterized by further comprising a concentrated water discharge control unit, wherein the concentrated water discharge control unit comprises a first branch (410), a second branch (420) and a wastewater ratio component;
the water outlet end of the first branch (410) is connected to the water inlet pipeline (111), and a first electromagnetic valve (412) is arranged on the first branch (410);
the water outlet end of the second branch (420) is connected with the water outlet section of the concentrated water pipeline (112) or directly emptied, and the second branch (420) is provided with a second electromagnetic valve (422);
the water inlet end of the first branch (410) and the water inlet end of the second branch (420) are connected to a concentrated water pipeline (112) between a concentrated water outlet of the reverse osmosis membrane treatment unit (300) and a concentrated water discharge electromagnetic valve (125) through a wastewater ratio component.
2. The water purification system of claim 1, wherein the concentrated water discharge control unit further comprises a third branch (430), a water inlet end of the third branch (430) is connected to the concentrated water pipeline (112) between the concentrated water outlet of the reverse osmosis membrane treatment unit (300) and the concentrated water discharge solenoid valve (125), a water outlet end of the third branch (430) is connected to a water outlet section of the concentrated water pipeline (112) or directly drained, and a third wastewater ratio (431) is arranged on the third branch (430).
3. The water purification system of claim 1, wherein the waste water ratio assembly comprises a first waste water ratio (411), wherein the water inlet end of the first branch (410) and the water inlet end of the second branch (420) are connected to the water outlet end of the first waste water ratio (411), and the water inlet end of the first waste water ratio (411) is connected to the concentrate pipe (112) between the concentrate outlet of the reverse osmosis membrane treatment unit (300) and the concentrate discharge solenoid valve (125).
4. The water purification system of claim 1, wherein the waste water ratio assembly comprises a first waste water ratio (411) and a second waste water ratio (421);
the water inlet end of the first branch (410) is connected with the water outlet end of the first wastewater ratio (411), and the water inlet end of the first wastewater ratio (411) is connected with a concentrated water pipeline (112) between a concentrated water outlet of the reverse osmosis membrane treatment unit (300) and a concentrated water discharge electromagnetic valve (125);
the water inlet end of the second branch (420) is connected to the water outlet end of the second wastewater ratio (421), and the water inlet end of the second wastewater ratio (421) is connected to a concentrated water pipeline (112) between a concentrated water outlet of the reverse osmosis membrane treatment unit (300) and a concentrated water discharge electromagnetic valve (125).
5. The water purification system of claim 1, wherein a pressure stabilizing pump (126) is further arranged on a water inlet pipeline (111) between the pretreatment unit and the reverse osmosis membrane treatment unit (300), and a connection point of the water outlet end of the first branch (410) and the water inlet pipeline (111) is arranged between the pretreatment unit and the pressure stabilizing pump (126).
6. The water purification system of claim 4, further comprising a control center in signal connection with the concentrate discharge solenoid valve (125), the first solenoid valve (412), the first wastewater ratio (411), the second solenoid valve (422), the second wastewater ratio (421).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106396160A (en) * | 2016-11-24 | 2017-02-15 | 珠海格力电器股份有限公司 | Water purification system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106396160A (en) * | 2016-11-24 | 2017-02-15 | 珠海格力电器股份有限公司 | Water purification system and control method thereof |
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