CN114105253A - Reverse osmosis water purification system, control method and water purification equipment - Google Patents
Reverse osmosis water purification system, control method and water purification equipment Download PDFInfo
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- CN114105253A CN114105253A CN202010873882.8A CN202010873882A CN114105253A CN 114105253 A CN114105253 A CN 114105253A CN 202010873882 A CN202010873882 A CN 202010873882A CN 114105253 A CN114105253 A CN 114105253A
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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
- C02F1/44—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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention discloses a reverse osmosis water purification system, a control method and water purification equipment. The water purification system comprises a water inlet pipeline, a booster pump, a first reverse osmosis filter element, a second reverse osmosis filter element, a bypass pipeline, a wastewater pipeline, a water outlet pipeline, a backflushing pipeline, a first valve, a second valve, a third valve, a fourth valve and a fifth valve. The booster pump is arranged on the water inlet pipeline; the water inlet side of the first reverse osmosis filter element is communicated with the water inlet pipeline; and the water inlet side of the second reverse osmosis filter element is communicated with the water inlet side of the first reverse osmosis filter element. After the water purification unit restarts, the water outlet user just can directly drink when starting to make water, and the drinking is not influenced even if the water purification unit is stopped for a long time, so that the water using experience of the user is improved. Meanwhile, the back washing process can wash a large amount of substances such as inorganic salt ions attached to the reverse osmosis membrane of the second reverse osmosis filter element, and the substances are discharged through a waste water pipeline, so that the filtering effect and speed of the reverse osmosis membrane are improved.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a reverse osmosis water purification system, a control method and water purification equipment.
Background
Reverse Osmosis (RO) is a water treatment technology commonly used at present, and is commonly used in water purification equipment such as various water purifiers, and the principle of the technology is that raw water with pressure passes through the RO, water molecules can pass through the RO under pressure driving, and inorganic salt ions, bacteria, viruses, organic matters, colloid and the like are intercepted by the RO, so that the purification of the raw water is realized, and pure drinking water is obtained.
When the reverse osmosis water purification equipment is not used for a long time, part of inorganic salt ions and small molecular weight substances on one side of raw water of the reverse osmosis membrane gradually pass through the reverse osmosis membrane, so that the Total Dissolved Solids (TDS) concentration on one side of purified water is gradually increased and is even finally the same as the Total Dissolved Solids (TDS) concentration of the raw water. The reverse osmosis water purification equipment is reused, the TDS concentration of the effluent water is high when water production is started, the water quality is poor, and the water use experience of users is influenced; meanwhile, after the reverse osmosis membrane of the reverse osmosis filter element is used for a long time, a large amount of substances such as inorganic salt ions and the like are attached to the reverse osmosis membrane, and the filtering effect and the speed of the reverse osmosis membrane are reduced.
Disclosure of Invention
The invention aims to provide a reverse osmosis water purification system, a control method and water purification equipment.
The invention discloses a reverse osmosis water purification system which comprises a water inlet pipeline, a booster pump, a first reverse osmosis filter element, a second reverse osmosis filter element, a bypass pipeline, a waste water pipeline, a water outlet pipeline, a back flushing pipeline, a first valve, a second valve, a third valve, a fourth valve and a fifth valve. The booster pump is arranged on the water inlet pipeline; the water inlet side of the first reverse osmosis filter element is communicated with the water inlet pipeline; the water inlet side of the second reverse osmosis filter element is communicated with the water inlet side of the first reverse osmosis filter element; the bypass pipeline is communicated with the water inlet side of the first reverse osmosis filter element; the waste water pipeline is communicated with the water inlet side of the second reverse osmosis filter element; the water outlet pipeline is communicated with the water outlet side of the second reverse osmosis filter element; one end of the backflushing pipeline is communicated with the water outlet side of the first reverse osmosis filter element, and the other end of the backflushing pipeline is communicated with the water outlet pipeline. The first valve is arranged on the water inlet pipeline; the second valve is arranged on a communicating pipeline of the first reverse osmosis filter element and the second reverse osmosis filter element and is positioned behind the bypass pipeline; the third valve is arranged on the bypass pipeline; the fourth valve is arranged on the waste water pipeline; and the fifth valve is arranged on the water outlet pipeline and is positioned behind the communication part of the backflushing pipeline and the water outlet pipeline.
Optionally, the water purification system comprises a first flow meter, and the first flow meter is arranged on the wastewater pipeline.
Optionally, the water purification system comprises a second flow meter, and the second flow meter is arranged on the backflushing pipeline.
Optionally, the water purification system includes a third flow meter, and the third flow meter is disposed on the water inlet pipeline.
Optionally, the water purification system comprises a first TDS meter disposed on the waste water line.
The invention also discloses a control method of the reverse osmosis water purification system, which is applied to the reverse osmosis water purification system and comprises the following steps:
step a, opening a first valve, a second valve, a fourth valve and a fifth valve, closing the third valve, and starting water production by a water purification system;
b, under a first specific condition, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state;
c, circulating the purified water at the water outlet side of the first reverse osmosis filter element to the water outlet side of the second reverse osmosis filter element through a back flushing pipeline, and performing back flushing on a reverse osmosis membrane of the second reverse osmosis filter element; meanwhile, a bypass pipeline discharges the wastewater at the water inlet side of the first reverse osmosis filter element, and a wastewater pipeline discharges the wastewater at the water inlet side of the second reverse osmosis filter element;
and d, stopping the backflushing circulation after a second specific condition is reached.
Optionally, after the step a, the method further includes:
the amount of wastewater recorded by the first flow meter;
the step b is specifically as follows:
when the waste water amount recorded by the first flowmeter is kept unchanged, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state;
the step d is specifically as follows:
in the back flushing process, after the wastewater volume recorded by the first flow meter reaches a first preset flow value, the back flushing circulation is stopped.
Optionally, after the step a, the method further includes:
the amount of wastewater recorded by the first flow meter;
the step b is specifically as follows:
after the wastewater amount recorded by the first flowmeter is kept unchanged and first preset time passes, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state;
the step d is specifically as follows:
and stopping the backflushing circulation after the second preset time.
Optionally, after the step b, the method further includes:
the second flowmeter records the water flow of the backflushing pipeline;
the step d is specifically as follows:
and stopping the back flushing circulation after the water flow recorded by the second flowmeter reaches a second preset flow value.
Optionally, after the step a, the method further includes:
the water inflow recorded by the third flowmeter;
the step c is specifically as follows:
after the water inflow recorded by the third flowmeter reaches a third preset flow value, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an open state;
the step d is specifically as follows:
and stopping the backflushing circulation after the water inflow recorded by the third flow meter reaches a fourth preset flow value.
Optionally, step d specifically includes:
the first TDS meter records the total amount of dissolved solids of the wastewater in the wastewater line;
and stopping the backflushing cycle when the total amount of the soluble solids of the wastewater in the wastewater pipeline is less than a first preset threshold value.
The invention also discloses water purification equipment comprising the reverse osmosis water purification system.
According to the reverse osmosis water purification system, purified water on the water outlet side of the first reverse osmosis filter element is circulated to the water outlet side of the second reverse osmosis filter element through the back flushing pipeline, the reverse osmosis membrane of the second reverse osmosis filter element is back flushed, water staying on the water inlet side of the second reverse osmosis filter element is diluted, the TDS concentration on the water inlet side of the second reverse osmosis filter element is low, the water quality is good, the TDS concentration of the first reverse osmosis filter element is low originally, substances such as inorganic salt ions and the like on the water inlet side permeate to the water outlet side, even if permeation exists, the water quality on the water inlet side can still be in a good range, after the water purification equipment is restarted, a user just starts to produce water can drink the water directly, even if the water purification equipment is stopped for a long time, the user reference is not influenced, and the water using experience of the user is improved. Meanwhile, the back washing process can wash a large amount of substances such as inorganic salt ions attached to the reverse osmosis membrane of the second reverse osmosis filter element, and the substances are discharged through a waste water pipeline, so that the filtering effect and speed of the reverse osmosis membrane are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a reverse osmosis water purification system according to an embodiment of the present invention;
FIG. 2 is another schematic diagram of a reverse osmosis water purification system according to an embodiment of the present invention;
FIG. 3 is another schematic diagram of a reverse osmosis water purification system according to an embodiment of the present invention;
FIG. 4 is another schematic diagram of a reverse osmosis water purification system according to an embodiment of the present invention;
FIG. 5 is another schematic diagram of a reverse osmosis water purification system according to an embodiment of the present invention;
FIG. 6 is a flow chart of a control method of a reverse osmosis water purification system according to an embodiment of the invention;
fig. 7 is a schematic diagram of reverse osmosis water purification equipment according to an embodiment of the invention.
Wherein, 1, a water purifying device; 2. a reverse osmosis water purification system; 3. a water inlet pipeline; 4. a booster pump; 5. a first reverse osmosis filter element; 51. a water inlet side; 52. a reverse osmosis membrane; 53. a water outlet side; 6. a second reverse osmosis filter element; 7. a bypass line; 8. a waste water line; 9. a water outlet pipeline; 10. A back flushing pipeline; 11. a first valve; 12. a second valve; 13. a third valve; 14. a fourth valve; 15. a fifth valve; 16. a first flow meter; 17. a second flow meter; 18. a third flow meter; 19. a first TDS meter.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present invention may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, and are only for convenience of simplifying the description of the present invention, and do not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in detail below with reference to the figures and alternative embodiments.
As shown in fig. 1, as an embodiment of the present invention, a reverse osmosis water purification system 2 is disclosed, which includes a water inlet pipeline 3, a booster pump 4, a first reverse osmosis filter element 5, a second reverse osmosis filter element 6, a bypass pipeline 7, a wastewater pipeline 8, a water outlet pipeline 9, a back flush pipeline 10, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, and a fifth valve 15. The booster pump 4 is arranged on the water inlet pipeline 3; the water inlet side 51 of the first reverse osmosis filter element 5 is communicated with the water inlet pipeline 3; the water inlet side of the second reverse osmosis filter element 6 is communicated with the water inlet side 51 of the first reverse osmosis filter element 5; the bypass pipeline 7 is communicated with the water inlet side 51 of the first reverse osmosis filter element 5; the waste water pipeline 8 is communicated with the water inlet side of the second reverse osmosis filter element 6; the water outlet pipeline 9 is communicated with the water outlet side of the second reverse osmosis filter element 6; one end of the backflushing pipeline 10 is communicated with the water outlet side 53 of the first reverse osmosis filter element 6, and the other end of the backflushing pipeline is communicated with the water outlet pipeline 9. The first valve 11 is arranged on the water inlet pipeline 3; the second valve 12 is arranged on a communication pipeline of the first reverse osmosis filter element 5 and the second reverse osmosis filter element 6 and is positioned behind the bypass pipeline 7; the third valve 13 is arranged on the bypass pipeline 7; the fourth valve 14 is arranged on the waste water line 8; the fifth valve 15 is arranged on the water outlet pipeline 9 and behind the communication part of the backflushing pipeline 10 and the water outlet pipeline 9.
The bypass pipeline 7 is communicated with the water inlet side 51 of the first reverse osmosis filter element 5, wherein one end of the bypass pipeline 7 is directly communicated with the water inlet side 51 of the first reverse osmosis filter element 5, and the bypass pipeline can also be communicated with a communicating pipeline between the first reverse osmosis filter element 5 and the second reverse osmosis filter element 6. Correspondingly, the second valve 12 is located behind the bypass pipeline 7, if one end of the bypass pipeline 7 is directly communicated with the water inlet side 51 of the first reverse osmosis filter element 5, the second valve 12 only needs to be arranged on a communication pipeline of the first reverse osmosis filter element 5 and the second reverse osmosis filter element 6, and if the bypass pipeline 7 is communicated on the communication pipeline between the first reverse osmosis filter element 5 and the second reverse osmosis filter element 6, the second valve 12 is arranged behind the bypass pipeline 7.
The water inlet sides of the first reverse osmosis filter element 5 and the second reverse osmosis filter element 6 refer to the sides of water which are not filtered by the reverse osmosis membranes in the first reverse osmosis filter element 5 and the second reverse osmosis filter element 6, and raw water or waste water is positioned at the sides; the outlet side 53 refers to the side of the water which has been filtered by the reverse osmosis membranes in the first and second reverse osmosis filter elements 5, 6, where the water is purified for drinking by the user. The raw water in the present invention refers to water before being filtered by the reverse osmosis membrane 52, and may be tap water or the like generally supplied to a municipal pipeline; the purified water refers to water filtered by the reverse osmosis membrane 52 and is drunk by a user; the waste water is the residual water after the raw water is continuously filtered by the reverse osmosis membrane 52, and the TDS concentration of the partial water is generally higher than that of the raw water, and the partial water can be discharged through the waste water pipeline 8.
When the reverse osmosis water purifying device 1 is not used for a long time, the water at the water inlet side 51 is rich in inorganic salt ions and small molecular weight substances, and the concentration of the water is high, and the water gradually passes through the reverse osmosis membrane 52, so that the TDS concentration at the water outlet side 53 is gradually increased. This just leads to reverse osmosis water purification unit 1 to be reusing, and the play water TDS concentration when just beginning to make water is high, and quality of water is poor, has influenced user's experience with water. Meanwhile, after the reverse osmosis membrane 52 of the reverse osmosis filter element is used for a long time, a large amount of substances such as inorganic salt ions and the like are attached to the reverse osmosis membrane 52, and the filtering effect and the speed of the reverse osmosis membrane 52 are reduced.
In the reverse osmosis water purification system 2, when water is normally produced, the first valve 11, the second valve 12, the fourth valve 14 and the fifth valve 15 are opened, the third valve 13 is closed, and water is normally produced by the water purification equipment. When the water purifying equipment stops producing water for a long time, the second valve 12 and the fifth valve 15 are closed, the third valve 13 is opened, the first valve 11 and the fourth valve 14 are kept in an open state, the booster pump 4 works, purified water on the water outlet side 53 of the first reverse osmosis filter element 5 circulates to the water outlet side of the second reverse osmosis filter element 6 through the backflushing pipeline 10, the reverse osmosis membrane of the second reverse osmosis filter element is backflushed, water staying on the water inlet side of the second reverse osmosis filter element 6 is diluted, generated wastewater is discharged from a wastewater pipeline, and the circulation can be stopped after reaching a certain condition. At this time, although the second reverse osmosis filter element 6 flows into the previous water making process, the water on the water inlet side 51 of the first reverse osmosis filter element 5 flows into the water making process, after the reverse washing process, the TDS concentration on the water inlet side of the second reverse osmosis filter element 6 is small, the water quality is good, the TDS concentration of the first reverse osmosis filter element 5 is small, the permeation of substances such as inorganic salt ions and the like on the water inlet side 51 to the water outlet side 53 is small, even if the permeation exists, the water quality on the water inlet side 51 can still be in a good range, after the water purifying equipment is restarted, a water outlet user can directly drink the water when the water making process is started, the reference is not influenced even after the water making equipment is stopped for a long time, and the water using experience of the user is improved. Meanwhile, the back washing process can wash a large amount of inorganic salt ions and other substances attached to the reverse osmosis membrane of the second reverse osmosis filter element 6, and the substances are discharged through the waste water pipeline 8, so that the filtering effect and speed of the reverse osmosis membrane 52 are improved.
Specifically, the booster pump 4 is arranged on the water inlet pipeline 3 between the first valve 11 and the first reverse osmosis filter element 5. The first valve is arranged before the booster pump 4.
Specifically, the first valve 11, the second valve 12, the third valve 13, the fourth valve 14, and the fifth valve 15 may be solenoid valves, or other valves.
Further, as shown in fig. 2, the water purification system includes a first flow meter 16, and the first flow meter 16 is disposed on the waste water pipeline 8. The first flow meter 16 may record the amount of wastewater, monitor the specific water production conditions of the reverse osmosis water purification system 2, and take different actions depending on the water production conditions, for example, decide whether to initiate a back flush cycle depending on whether the amount of wastewater continues to increase. Specifically, the first flow meter 16 is disposed after the fourth valve.
Further, as shown in fig. 3, the water purification system includes a second flow meter 17, and the second flow meter 17 is disposed on the backflushing line 10. The second flow meter 17 records the water flow rate of the backflushing pipeline 10, monitors the specific water production condition of the reverse osmosis water purification system 2, and takes different actions according to the water production condition, for example, whether the backflushing circulation is stopped according to the water flow rate recorded by the second flow meter 17.
As shown in fig. 4, the water purification system further includes a third flow meter 18, and the third flow meter 18 is disposed on the water inlet pipe 3. The second flow meter 17 records the water inflow of the water inlet pipe, monitors the specific water production condition of the reverse osmosis water purification system 2, and takes different actions according to the water production condition, for example, after the water inflow recorded by the third flow meter 18 reaches a preset flow value, the second valve 12 and the fifth valve 15 are closed, the third valve 13 is opened, the first valve 11 and the fourth valve 14 are kept in an open state, and the backflushing cycle is started. Specifically, the third flow meter 18 is disposed between the first valve and the booster pump.
As shown in fig. 5, the water purification system may further comprise a first TDS meter 19, the first TDS meter 19 being arranged on the waste water line 8. The first TDS meter 19 records the Total Dissolved Solids (TDS) of the wastewater in the wastewater line 8, monitors the specific water production condition of the reverse osmosis water purification system 2, and can accurately master the back-flushing condition of the second reverse osmosis filter element 6 so as to take different actions, for example, when the Total dissolved solids of the wastewater in the wastewater line 8 is less than a preset threshold, the back-flushing cycle is stopped, and the like. In particular, the first TDS meter 19 is arranged after the fourth valve
Of course, the reverse osmosis water purification system 2 may further be provided with a second TDS meter, a third TDS meter, etc. Specifically, for example, a second TDS meter is provided on the bypass line 7 to monitor the total amount of dissolved solids on the line; a third DS meter is arranged on the water outlet line 9 to monitor the total amount of dissolved solids in the water after the water is produced again by the water purification system.
As another embodiment of the present invention, a control method of a reverse osmosis water purification system is also disclosed, which is applied to the reverse osmosis water purification system 2 as described above, and as shown in fig. 6, the method includes the steps of:
step a, opening a first valve, a second valve, a fourth valve and a fifth valve, closing the third valve, and starting water production by a water purification system;
b, under a first specific condition, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state;
c, circulating the purified water at the water outlet side of the first reverse osmosis filter element to the water outlet side of the second reverse osmosis filter element through a back flushing pipeline, and performing back flushing on a reverse osmosis membrane of the second reverse osmosis filter element; meanwhile, a bypass pipeline discharges the wastewater at the water inlet side of the first reverse osmosis filter, and a wastewater pipeline discharges the wastewater at the water inlet side of the second reverse osmosis filter element;
and d, stopping the backflushing circulation after a second specific condition is reached.
In the scheme, the step a is a normal water production state of the water purification system, and the steps b to d are a backwashing circulation state. In the scheme, when the water purification system performs backwashing circulation, purified water on the water outlet side 53 of the first reverse osmosis filter element 5 is circulated to the water outlet side 53 of the second reverse osmosis filter element 6 through the backwashing pipeline 10, the reverse osmosis membrane 52 of the second reverse osmosis filter element is backwashed, water staying on the water inlet side 51 of the second reverse osmosis filter element 6 is diluted, generated wastewater is discharged from a wastewater pipeline, and the circulation can be stopped after reaching a certain condition. At this time, although the second reverse osmosis filter element 6 flows into the previous water making process, the water on the water inlet side 51 of the first reverse osmosis filter element 5 flows into the water making process, after the reverse washing process, the TDS concentration of the water inlet side 51 of the second reverse osmosis filter element 6 is small, the water quality is good, the TDS concentration of the first reverse osmosis filter element 5 is also small, the permeation of substances such as inorganic salt ions and the like on the water inlet side 51 to the water outlet side 53 is small, even if the permeation exists, the water quality on the water inlet side 51 can still be in a good range, after the water purifying equipment is restarted, a water outlet user can directly drink the water when the water making process is started, the reference is not influenced even after the water making equipment is stopped for a long time, and the water using experience of the user is improved. Meanwhile, in the back washing process, a large amount of substances such as inorganic salt ions and the like attached to the reverse osmosis membrane 52 of the second reverse osmosis filter element 6 can be washed away and discharged through the waste water pipeline 8, so that the filtering effect and the speed of the reverse osmosis membrane 52 are improved.
It should be noted that, in the whole process, the booster pump 4 is started as required, for example, in the normal water production process in step a, the booster pump 4 is normally started, and when water is not produced, the remote rotation is temporarily stopped; in step c, the booster pump 4 is restarted to achieve a back flushing cycle; in step d, the booster pump 4 stops the long rotation.
Specifically, the step a further includes:
the amount of wastewater recorded by the first flow meter;
correspondingly, the step b specifically comprises the following steps:
when the waste water amount recorded by the first flowmeter is kept unchanged, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state; here, the first specific condition is "when the amount of wastewater recorded by the first flow meter remains unchanged".
Correspondingly, the step d specifically includes:
in the back flushing process, after the wastewater volume recorded by the first flow meter reaches a first preset flow value, the back flushing circulation is stopped. Wherein, the second specific condition is that the wastewater volume recorded by the first flowmeter reaches a first preset flow value in the back flushing process.
The amount of waste water recorded by the first flow meter 16 remaining unchanged indicates that the water purification system has stopped producing water, at which point the backflush cycle may be started. The amount of waste water recorded by the first flow meter 16 determines the stopping of the backflushing cycle, which is more accurate and more effective. The first preset flow value may be set to a real-time adjustment mode, that is, the user may adjust the first preset flow value up or down according to the previous effect of the backflushing cycle, so as to achieve the effect desired by the user.
In another embodiment, the step a may be followed by:
the amount of wastewater recorded by the first flow meter;
correspondingly, the step b may specifically be:
after the wastewater amount recorded by the first flowmeter is kept unchanged and first preset time passes, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state; here, the first specific condition is "the amount of wastewater recorded by the first flow meter remains unchanged and a first preset time elapses".
Correspondingly, the step d may specifically be:
stopping the backflushing circulation after a second preset time; the second specific condition is "after the second preset time elapses".
The amount of waste water recorded by the first flow meter 16 remaining unchanged indicates that the water purification system has stopped producing water. And after the first preset time, the water purification system does not start to produce water, and then the back flushing circulation is carried out. Because water purification system generally uses frequently, set up first preset time and can avoid water purification system frequently to carry out the recoil circulation, influence user's normal use. The second preset time determines the time of the backflushing cycle, wherein the first preset time and the second preset time can be set to be in a real-time adjusting mode, namely, a user can adjust the first preset time and the second preset time according to the frequency and the effect of the previous backflushing cycle so as to achieve the effect desired by the user.
In another embodiment, the step a may be followed by:
the water inflow recorded by the third flowmeter;
correspondingly, the step c may specifically be:
after the water inflow recorded by the third flowmeter reaches a third preset flow value, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an open state; the first specific condition here is "after the water inflow recorded by the third flow meter reaches a third preset flow value".
Correspondingly, the step d may specifically be:
and stopping the backflushing circulation after the water inflow recorded by the third flow meter reaches a fourth preset flow value, wherein the second specific condition is that the water inflow recorded by the third flow meter reaches the fourth preset flow value.
On the other hand, step b may be followed by:
the second flowmeter records the water flow of the backflushing pipeline;
correspondingly, the step d specifically includes:
stopping the back flushing circulation after the water flow recorded by the second flowmeter reaches a second preset flow value; the second specific condition here is specifically "after the water flow rate recorded by the second flowmeter reaches the second preset flow rate value".
In the scheme, the water flow of the backflushing pipeline 10 is recorded through the second flowmeter 17, and whether the backflushing circulation is stopped or not is determined. The second preset flow value may also be set to a real-time adjustment mode, that is, the user may adjust the second preset flow value according to the previous effect of the backflushing cycle, so as to achieve the effect desired by the user.
On the other hand, the step d is specifically as follows:
the first TDS meter records the total amount of dissolved solids of the wastewater in the wastewater line;
stopping the backflushing circulation when the total amount of the soluble solids of the wastewater in the wastewater pipeline is smaller than a first preset threshold value; wherein the second specific condition is "when the total amount of soluble solids in the wastewater line is less than the first predetermined threshold"
In this scheme, directly judge the quality of water condition in the second reverse osmosis filter core 6 through TDS concentration, it is more accurate. The first preset threshold may also be set to a real-time adjustment mode, that is, the user may adjust the size of the first preset threshold according to the previous effect of the backflushing cycle, so as to achieve the effect desired by the user.
As another embodiment of the present invention, as shown in fig. 7, a water purifying apparatus is also disclosed, which comprises the reverse osmosis water purifying system 2 as described above.
It should be noted that, the limitations of the steps involved in the present disclosure are not considered to limit the order of the steps without affecting the implementation of the specific embodiments, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously, and as long as the present disclosure can be implemented, all should be considered to belong to the protection scope of the present disclosure.
The foregoing is a more detailed description of the invention in connection with specific alternative embodiments, and the practice of the invention should not be construed as limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (12)
1. A reverse osmosis water purification system, characterized in that, the water purification system includes:
a water inlet pipeline;
the booster pump is arranged on the water inlet pipeline;
the water inlet side of the first reverse osmosis filter element is communicated with the water inlet pipeline;
the water inlet side of the second reverse osmosis filter element is communicated with the water inlet side of the first reverse osmosis filter element;
the bypass pipeline is communicated with the water inlet side of the first reverse osmosis filter element;
the waste water pipeline is communicated with the water inlet side of the second reverse osmosis filter element;
the water outlet pipeline is communicated with the water outlet side of the second reverse osmosis filter element;
one end of the backflushing pipeline is communicated with the water outlet side of the first reverse osmosis filter element, and the other end of the backflushing pipeline is communicated with the water outlet pipeline;
the first valve is arranged on the water inlet pipeline;
the second valve is arranged on a communicating pipeline of the first reverse osmosis filter element and the second reverse osmosis filter element and is positioned behind the bypass pipeline;
the third valve is arranged on the bypass pipeline;
the fourth valve is arranged on the waste water pipeline;
and the fifth valve is arranged on the water outlet pipeline and is positioned behind the communication part of the backflushing pipeline and the water outlet pipeline.
2. The reverse osmosis water purification system of claim 1, wherein the water purification system comprises a first flow meter disposed on the waste line.
3. The reverse osmosis water purification system of claim 1, wherein the water purification system comprises a second flow meter disposed on the backwash line.
4. The reverse osmosis water purification system of claim 1, wherein the water purification system comprises a third flow meter, the third flow meter being disposed on the water inlet line.
5. The reverse osmosis water purification system of claim 1, wherein the water purification system comprises a first TDS meter disposed on the waste line.
6. A control method of a reverse osmosis water purification system applied to the reverse osmosis water purification system of any one of claims 1 to 5, the method comprising the steps of:
step a, opening a first valve, a second valve, a fourth valve and a fifth valve, closing the third valve, and starting water production by a water purification system;
b, under a first specific condition, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state;
c, circulating the purified water at the water outlet side of the first reverse osmosis filter element to the water outlet side of the second reverse osmosis filter element through a back flushing pipeline, and performing back flushing on a reverse osmosis membrane of the second reverse osmosis filter element; meanwhile, a bypass pipeline discharges the wastewater at the water inlet side of the first reverse osmosis filter element, and a wastewater pipeline discharges the wastewater at the water inlet side of the second reverse osmosis filter element;
and d, stopping the backflushing circulation after a second specific condition is reached.
7. The method of claim 6, wherein the step a is followed by the steps of:
the amount of wastewater recorded by the first flow meter;
the step b is specifically as follows:
when the waste water amount recorded by the first flowmeter is kept unchanged, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state;
the step d is specifically as follows:
in the back flushing process, after the wastewater volume recorded by the first flow meter reaches a first preset flow value, the back flushing circulation is stopped.
8. The method of claim 6, wherein the step a is followed by the steps of:
the amount of wastewater recorded by the first flow meter;
the step b is specifically as follows:
after the wastewater amount recorded by the first flowmeter is kept unchanged and first preset time passes, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an opening state;
the step d is specifically as follows:
and stopping the backflushing circulation after the second preset time.
9. The method of claim 6, wherein step b is followed by further comprising:
the second flowmeter records the water flow of the backflushing pipeline;
the step d is specifically as follows:
and stopping the back flushing circulation after the water flow recorded by the second flowmeter reaches a second preset flow value.
10. The method of claim 6, wherein the step a is followed by the steps of:
the water inflow recorded by the third flowmeter;
the step c is specifically as follows:
after the water inflow recorded by the third flowmeter reaches a third preset flow value, closing the second valve and the fifth valve, opening the third valve, and keeping the first valve and the fourth valve in an open state;
the step d is specifically as follows:
and stopping the backflushing circulation after the water inflow recorded by the third flow meter reaches a fourth preset flow value.
11. The method of claim 10, wherein the step d is specifically as follows:
the first TDS meter records the total amount of dissolved solids of the wastewater in the wastewater line;
and stopping the backflushing cycle when the total amount of the soluble solids of the wastewater in the wastewater pipeline is less than a first preset threshold value.
12. A water purification apparatus comprising a reverse osmosis water purification system according to any one of claims 1 to 5.
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| CN202010873882.8A CN114105253A (en) | 2020-08-26 | 2020-08-26 | Reverse osmosis water purification system, control method and water purification equipment |
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| CN202010873882.8A CN114105253A (en) | 2020-08-26 | 2020-08-26 | Reverse osmosis water purification system, control method and water purification equipment |
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| CN114105253A true CN114105253A (en) | 2022-03-01 |
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