CN210635767U - Reverse osmosis system - Google Patents

Reverse osmosis system Download PDF

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Publication number
CN210635767U
CN210635767U CN201921375945.6U CN201921375945U CN210635767U CN 210635767 U CN210635767 U CN 210635767U CN 201921375945 U CN201921375945 U CN 201921375945U CN 210635767 U CN210635767 U CN 210635767U
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stage
cleaning
membrane filtration
water
unit
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CN201921375945.6U
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Chinese (zh)
Inventor
郑东华
张佳君
董峰
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Hohhot Outong Energy Technology Co ltd
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Hohhot Outong Energy Technology Co ltd
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Abstract

The utility model discloses a reverse osmosis system, which comprises a cleaning unit, a security filter, a first-stage high-pressure pump, a first-stage membrane filtration unit and a second-stage membrane filtration unit which are connected in sequence; it also includes a second stage high pressure pump. The advantages are that: part of concentrated water produced by the first-stage and second-stage membrane filtration units is subjected to reflux treatment by additionally arranging a first-stage concentrated water reflux pipe and a second-stage concentrated water reflux pipe, so that the water treatment capacity of the second-stage membrane filtration unit is reduced, and meanwhile, a second-stage high-pressure pump is additionally arranged in front of the second-stage membrane filtration unit to increase the pressure, so that the recovery efficiency of produced water is improved; moreover, the dosing points are arranged in front of the first-stage membrane filtration unit and the second-stage membrane filtration unit, so that scaling, fouling and blockage of the first-stage membrane filtration unit and the second-stage membrane filtration unit can be reduced; the front and the back of the first-stage and second-stage membrane filtration units are respectively provided with a cleaning pipe and a cleaning water return pipe, so that two-stage independent cleaning can be realized, and the cleaning is convenient.

Description

Reverse osmosis system
The technical field is as follows:
the utility model relates to a reverse osmosis technology field, specifically speaking relate to a reverse osmosis system.
Background art:
the prior advanced wastewater treatment process comprises a plurality of processes such as sand filtration, activated carbon, ultrafiltration, reverse osmosis, self-cleaning filter, ultrafiltration, reverse osmosis and MBR membrane and reverse osmosis, wherein reverse osmosis equipment is important equipment in the sewage treatment process.
The existing sewage treatment equipment comprises a security filter, a high-pressure pump and a reverse osmosis body device which are connected in sequence, wherein the reverse osmosis body device is a combined water treatment unit formed by combining and connecting reverse osmosis membrane components by using pipelines according to a certain arrangement mode, the common combined reverse osmosis water treatment unit is a multi-section arrangement system, namely as shown in figure 1, the combined reverse osmosis water treatment unit comprises a first section of membrane filtration unit 3 and a second section of membrane filtration unit 4, a concentrated water outlet of a membrane element of the first section of membrane filtration unit 3 is communicated with a water inlet of a membrane element of the second section of membrane filtration unit 4, and produced water of the first section of membrane filtration unit 3 and the second section of membrane filtration unit; in addition, in order to facilitate cleaning, a cleaning unit is also arranged, a water outlet of the cleaning unit is communicated with a water inlet of a membrane element of the first-stage membrane filtering unit 3, and a water return port of the cleaning unit is communicated with a concentrated water outlet of the second-stage membrane filtering unit 4. The reverse osmosis system can improve the water yield, but has the following problems in the using process: 1. concentrated water produced by the first-stage membrane filtering unit 3 is directly discharged into the second-stage membrane filtering unit 4, the pressure is reduced, so that the filtering effect of the second-stage membrane filtering unit 4 is poor, part of water is discharged along with the concentrated water, and the recovery rate is high; 2. the concentrated water produced by the first-stage membrane filtering unit 3 completely enters the second-stage membrane filtering unit 4 for secondary filtering, and the scale inhibitor adding point is positioned at the inlet of the first-stage membrane filtering unit 3, so that the concentrated water entering the second-stage membrane filtering unit 4 is large in quantity, poor in filtering effect, serious in pollution degree of a membrane element of the second-stage membrane filtering unit 4, and short in service life; 3. during cleaning, cleaning liquid of the cleaning unit sequentially passes through the first-stage membrane filtration unit 3 and the second-stage membrane filtration unit 4 and then returns to the cleaning unit, so that the first-stage membrane filtration unit 3 and the second-stage membrane filtration unit 4 cannot be cleaned independently.
The utility model has the following contents:
an object of the utility model is to provide a reverse osmosis system that recovery efficiency of product water is high.
The utility model discloses by following technical scheme implement: a reverse osmosis system comprises a cleaning unit, a cartridge filter, a first-stage high-pressure pump, a first-stage membrane filtration unit and a second-stage membrane filtration unit which are sequentially connected; the membrane filtration unit comprises a first-stage membrane filtration unit, a second-stage membrane filtration unit, a first-stage high-pressure pump, a second-stage high-pressure pump and a membrane filtration unit, wherein a concentrated water outlet of the first-stage membrane filtration unit is divided into two paths, one path is communicated with an inlet of the first-stage high-pressure pump through a first-stage concentrated water return pipe, and the other path is communicated; the outlet of the secondary high-pressure pump is communicated with the inlet of the secondary membrane filtering unit, the concentrated water outlet of the secondary membrane filtering unit is divided into two paths, one path is communicated with the inlet of the secondary high-pressure pump through a secondary concentrated water return pipe, and the other path is connected with a concentrated water discharge control valve; and the first section of concentrated water return pipe and the second section of concentrated water return pipe are sequentially provided with a concentrated water control valve and a concentrated water flowmeter along the medium flowing direction.
Furthermore, a cleaning water outlet of the cleaning unit is respectively communicated with inlets of the membrane elements of the first section of membrane filtering unit and the second section of membrane filtering unit through cleaning pipes, and cleaning control valves are arranged on the cleaning pipes; concentrated water outlets of membrane elements of the first-stage membrane filtering unit and the second-stage membrane filtering unit are respectively communicated with a cleaning water return port of the cleaning unit through a cleaning water return pipe; and a return water control valve is arranged on the cleaning return water pipe.
Furthermore, the cleaning unit comprises a water tank, a cleaning pump and a filter, the water tank is communicated with a cleaning water return port, an inlet of the cleaning pump is communicated with a water tank pipeline, an outlet of the cleaning pump is communicated with an inlet of the filter, and an outlet of the filter is a cleaning water outlet.
Furthermore, a medicament adding control valve is communicated with the inlet of the security filter and the inlet of the secondary high-pressure pump.
The utility model has the advantages that: part of concentrated water produced by the first-stage and second-stage membrane filtration units is subjected to reflux treatment by additionally arranging a first-stage concentrated water reflux pipe and a second-stage concentrated water reflux pipe, so that the water treatment capacity of the second-stage membrane filtration unit is reduced, and meanwhile, a second-stage high-pressure pump is additionally arranged in front of the second-stage membrane filtration unit to increase the pressure, so that the recovery efficiency of produced water is improved; moreover, the dosing points are arranged in front of the first-stage membrane filtration unit and the second-stage membrane filtration unit, so that scaling, fouling and blockage of the first-stage membrane filtration unit and the second-stage membrane filtration unit can be reduced; the front and the back of the first-stage and second-stage membrane filtration units are respectively provided with a cleaning pipe and a cleaning water return pipe, so that two-stage independent cleaning can be realized, and the cleaning is convenient.
Description of the drawings:
FIG. 1 is a schematic view showing the structure of a conventional reverse osmosis water treatment unit according to the background art.
Fig. 2 is a schematic view of the overall structure of the present invention.
The device comprises a security filter 1, a first-stage high-pressure pump 2, a first-stage membrane filtering unit 3, a second-stage membrane filtering unit 4, a second-stage high-pressure pump 5, a first-stage concentrated water return pipe 6, a second-stage concentrated water return pipe 7, a concentrated water discharge control valve 8, a concentrated water control valve 9, a concentrated water flowmeter 10, a cleaning pipe 11, a cleaning control valve 12, a cleaning water return pipe 13, a water return control valve 14, a water tank 15, a cleaning pump 16, a filter 17 and a medicament adding control valve 20.
The specific implementation mode is as follows:
in the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element 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, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 2, a reverse osmosis system comprises a cleaning unit, and a cartridge filter 1, a first-stage high-pressure pump 2, a first-stage membrane filtration unit 3, a second-stage membrane filtration unit 4, and a second-stage high-pressure pump 5 which are connected in sequence;
the water produced in the previous process is filtered by a security filter 1 and then is pumped to a membrane filtering unit 3 at one end by a first-stage high-pressure pump 2 for first-stage filtering, membrane elements of the membrane filtering unit 3 at one end adopt anti-pollution brackish water reverse osmosis membrane elements, a concentrated water outlet of the membrane filtering unit 3 at one end is divided into two paths, one path is communicated with an inlet of the first-stage high-pressure pump 2 through a concentrated water return pipe 6, and the other path is communicated with an inlet of a second-stage high-pressure pump 5; the outlet of the second-stage high-pressure pump 5 is communicated with the inlet of the second-stage membrane filtering unit 4, and the membrane element of the second-stage membrane filtering unit 4 adopts an extremely strong anti-pollution brackish water reverse osmosis membrane element; the concentrated water outlet of the two-section membrane filtering unit 4 is divided into two paths, one path is communicated with the inlet of the second-stage high-pressure pump 5 through a two-section concentrated water return pipe 7, and the other path is connected with a concentrated water discharge control valve 8; a concentrated water control valve 9 and a concentrated water flowmeter 10 are sequentially arranged on the first-stage concentrated water return pipe 6 and the second-stage concentrated water return pipe 7 along the medium flowing direction, the amount of the concentrated water flowing back can be observed through the concentrated water flowmeter 10, and the amount of the concentrated water flowing back can be adjusted through the concentrated water control valve 9;
the inlet of the cartridge filter 1 and the inlet of the second-stage high-pressure pump 5 are both communicated with a medicament adding control valve 20, the inlet end of the medicament adding control valve 20 is communicated with a corresponding medicament box through a pipeline, and medicament is respectively added to the first-stage membrane filtering unit 3 and the second-stage membrane filtering unit 4 through the two medicament adding control valves 20, so that scale and pollution blockage of the first-stage membrane filtering unit 3 and the second-stage membrane filtering unit 4 is reduced;
the cleaning unit comprises a water tank 15, a cleaning pump 16 and a filter 17, the water tank 15 is communicated with a cleaning water return port, an inlet of the cleaning pump 16 is communicated with a pipeline of the water tank 15, an outlet of the cleaning pump 16 is communicated with an inlet of the filter 17, and an outlet of the filter 17 is a cleaning water outlet; the cleaned sewage flows back to the water tank 15 to be collected, when the water tank is cleaned again, the water in the water tank 15 is pumped to the filter 17 through the cleaning pump 16, impurities are filtered out of the water by the filter 17, and the filtered water is pumped to the membrane filtering unit through the cleaning pipe 11 again to participate in cleaning. A cleaning water outlet of the cleaning unit is respectively communicated with inlets of membrane elements of the first-stage membrane filtering unit 3 and the second-stage membrane filtering unit 4 through a cleaning pipe 11, and a cleaning control valve 12 is arranged on the cleaning pipe 11; concentrated water outlets of membrane elements of the first-stage membrane filtering unit 3 and the second-stage membrane filtering unit 4 are respectively communicated with a cleaning water return port of the cleaning unit through a cleaning water return pipe 13; a return water control valve 14 is arranged on the cleaning return water pipe 13; one section membrane filtration unit 3 and two sections membrane filtration unit 4 have been equipped with scavenge pipe 11 and wash wet return 13 respectively, and then can realize the individual washing of one section membrane filtration unit 3 and two sections membrane filtration unit 4.
The working principle is as follows: the water produced in the previous procedure enters a first-stage high-pressure pump 2 through a cartridge filter 1 to be pressurized and directly enters a first-stage membrane filtering unit 3, 30% of concentrated water produced by the first-stage membrane filtering unit 3 returns to the inlet of the first-stage high-pressure pump 2 through a first-stage concentrated water return pipe 6, and the recovery ratio of the first-stage concentrated water is adjusted through a concentrated water control valve 9 on the first-stage concentrated water return pipe 6; the residual 70% of the produced concentrated water produced by the first-stage membrane filtering unit 3 is pressurized again by a second-stage high-pressure pump 5 and enters a second-stage membrane filtering unit 4 for desalination treatment, 80% of the concentrated water produced by the second-stage membrane filtering unit 4 is discharged by a concentrated water discharge control valve 8, 20% of the concentrated water produced by the second-stage membrane filtering unit 4 is recycled to the front section of the second-stage high-pressure pump 5 through a second-stage concentrated water return pipe 7 for treatment, and the recycling proportion of the second-stage concentrated water is adjusted by a concentrated water control valve 9 on the second-stage concentrated water return pipe 7; the first-stage concentrated water directly enters a second-stage membrane module for desalination, the second-stage concentrated water is discharged into a trench, and the first-stage and second-stage concentrated water is recovered.
In the process, scale inhibitor and sodium bisulfite are respectively added to the first section membrane filtration unit 3 and the second section membrane filtration unit 4 through two medicament adding control valves 20, so as to prevent the membranes from scaling and being oxidized by residual chlorine.
In the process, the cleaning control valve 12 and the water return control valve 14 are both in a closed state, when the first-stage membrane filtration unit 3 needs cleaning, the first-stage high-pressure pump 2 and the second-stage high-pressure pump 5 are closed, the cleaning control valve 12 and the water return control valve 14 on the front pipeline and the rear pipeline of the first-stage membrane filtration unit 3 are opened, the cleaning pump 16 pumps water in the water tank 15 to the filter 17, then the water enters the first-stage membrane filtration unit 3 through the corresponding cleaning pipe 11 for cleaning, and then the water returns to the water tank 15 through the cleaning water return pipe 13;
when the two-stage membrane filtration unit 4 needs to be cleaned, the cleaning control valve 12 and the return water control valve 14 on the front and rear pipelines of the two-stage membrane filtration unit 4 are opened, and the operations are repeated.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (4)

1. A reverse osmosis system comprises a cleaning unit, a cartridge filter, a first-stage high-pressure pump, a first-stage membrane filtration unit and a second-stage membrane filtration unit which are sequentially connected; the membrane filtration device is characterized by also comprising a secondary high-pressure pump, wherein a concentrated water outlet of the first-stage membrane filtration unit is divided into two paths, one path is communicated with an inlet of the primary high-pressure pump through a first-stage concentrated water return pipe, and the other path is communicated with an inlet of the secondary high-pressure pump; the outlet of the secondary high-pressure pump is communicated with the inlet of the secondary membrane filtering unit, the concentrated water outlet of the secondary membrane filtering unit is divided into two paths, one path is communicated with the inlet of the secondary high-pressure pump through a secondary concentrated water return pipe, and the other path is connected with a concentrated water discharge control valve; and the first section of concentrated water return pipe and the second section of concentrated water return pipe are sequentially provided with a concentrated water control valve and a concentrated water flowmeter along the medium flowing direction.
2. The reverse osmosis system of claim 1, wherein a cleaning water outlet of the cleaning unit is respectively communicated with inlets of the membrane elements of the first-stage membrane filtration unit and the second-stage membrane filtration unit through cleaning pipes, and cleaning control valves are arranged on the cleaning pipes; concentrated water outlets of membrane elements of the first-stage membrane filtering unit and the second-stage membrane filtering unit are respectively communicated with a cleaning water return port of the cleaning unit through a cleaning water return pipe; and a return water control valve is arranged on the cleaning return water pipe.
3. The reverse osmosis system of any one of claims 1 or 2, wherein the cleaning unit comprises a water tank, a cleaning pump and a filter, a cleaning water return port is communicated with the water tank, an inlet of the cleaning pump is communicated with the water tank pipeline, an outlet of the cleaning pump is communicated with an inlet of the filter, and an outlet of the filter is a cleaning water outlet.
4. The reverse osmosis system of any one of claims 1 or 2, wherein a dosing control valve is connected to the inlet of the cartridge filter and the inlet of the secondary high pressure pump.
CN201921375945.6U 2019-08-22 2019-08-22 Reverse osmosis system Active CN210635767U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921375945.6U CN210635767U (en) 2019-08-22 2019-08-22 Reverse osmosis system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921375945.6U CN210635767U (en) 2019-08-22 2019-08-22 Reverse osmosis system

Publications (1)

Publication Number Publication Date
CN210635767U true CN210635767U (en) 2020-05-29

Family

ID=70793220

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921375945.6U Active CN210635767U (en) 2019-08-22 2019-08-22 Reverse osmosis system

Country Status (1)

Country Link
CN (1) CN210635767U (en)

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