CN211189776U - Flushing device of multi-section reverse osmosis membrane system - Google Patents
Flushing device of multi-section reverse osmosis membrane system Download PDFInfo
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- CN211189776U CN211189776U CN201921608269.2U CN201921608269U CN211189776U CN 211189776 U CN211189776 U CN 211189776U CN 201921608269 U CN201921608269 U CN 201921608269U CN 211189776 U CN211189776 U CN 211189776U
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- 239000012528 membrane Substances 0.000 title claims abstract description 87
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 53
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 96
- 238000005406 washing Methods 0.000 claims abstract description 60
- 238000004140 cleaning Methods 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 239000012141 concentrate Substances 0.000 claims description 10
- 239000003814 drug Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000010612 desalination reaction Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to a washing unit of multistage reverse osmosis membrane system, this washing unit includes: a cleaning tank; the inlet of the flushing water pump is connected with the cleaning tank through a cleaning tank connecting pipeline; the two ends of the section of the front flushing pipeline are respectively connected with a washing water pump and a water inlet main pipe; the first end of the second-section intermediate pipeline is also connected with the outlet of the flushing water pump, and the second end of the second-section intermediate pipeline is respectively connected with the first-section water outlet pipeline and the second-section water inlet pipeline; the control valve group comprises a washing water pump valve arranged on a connecting pipeline of a washing water pump upstream washing pool, a two-section intermediate valve arranged on a two-section intermediate pipeline, a washing pipeline valve arranged on a section of front washing pipeline, a water inlet main pipe valve arranged on a water inlet main pipe, and a two-section washing valve arranged on a two-section water inlet pipeline. The utility model discloses a solve the serious problem of two preceding membrane elements pollution in one section membrane device of multistage reverse osmosis membrane system, improve the abluent efficiency of membrane element, alleviate whole multistage reverse osmosis membrane system's pollution problem then.
Description
Technical Field
The utility model relates to a washing unit, in particular to a washing unit which is applicable to a multi-section reverse osmosis membrane system polluted by organic matters, microorganisms, inorganic salts and the like.
Background
The reverse osmosis membrane has the characteristics of high desalination efficiency, small occupied area, environmental protection, wide application range, simple operation and the like, and is widely applied to tap water treatment, sewage deep treatment, seawater desalination, printing and dyeing, electroplating and other sewage purification. Because reverse osmosis is different from the traditional filtration mode, the traditional filtration mode can remove the intercepted pollutants from the filtration layer through backwashing of the filtration medium, and when the surface of the reverse osmosis membrane concentrates the pollutants such as salts, colloid, microorganism, organic matters and the like, concentrated substances are required to be taken away by virtue of concentrated water flowing in a direction parallel to the membrane. After the reverse osmosis membrane system is operated for a period of time, the problems of reduced desalination rate, reduced water yield, increased pressure difference and the like of the system can be caused by reverse osmosis membrane pollution.
generally speaking, when ③ reverse osmosis membrane system has ③ following phenomena that ③ membrane element is polluted, ③ membrane element is required to be cleaned in time, namely, ③ water flow of a product is reduced by 10-15% of a normal value under normal pressure, ③ water supply pressure is increased by 10-15% for maintaining ③ normal water flow of ③ product, and ③ water salt permeability of ③ product is increased by 10-15%.
In multistage reverse osmosis membrane system, when rivers were through two first membrane shells of first section membrane element, under the effect of water supply pressure, partly water when permeating reverse osmosis membrane, substance such as colloid, metallic oxide, bacterium, organic matter, incrustation scale can be accumulated to reverse osmosis membrane's dense water side, and two membrane shells are all serious than subsequent membrane shell in the front in membrane pollution, can cause single membrane element differential pressure to rise after the operation period, probably takes place telescope phenomenon even and cause the damage of membrane element physical structure. And traditional membrane washing mode sparge water gets into from one section membrane shell side of intaking, and the water flow direction is unanimous with the direction of intaking when moving, leads to washing effect not good, and anterior segment pollutant still can be washed back to the back end membrane element even, causes that follow-up component is dirty stifled, consequently needs a more effective washing mode.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model aims at providing a multistage reverse osmosis system's washing unit, the two first membrane elements through solving in one section membrane device of multistage reverse osmosis system pollute serious problem, improve the abluent efficiency of membrane element, alleviate whole multistage reverse osmosis system's pollution problem then.
In order to achieve the purpose, the utility model adopts the following technical proposal: the utility model provides a washing unit of multistage reverse osmosis membrane system, this multistage reverse osmosis membrane system include precision filter, high-pressure pump, one section membrane device and two sections membrane devices that connect gradually, and this washing unit includes: the cleaning tank is used for placing reverse osmosis product water; the inlet of the washing water pump is connected with the washing tank through a washing tank connecting pipeline; a first end of the section of the front flushing pipeline is connected with an outlet of the flushing water pump, and a second end of the section of the front flushing pipeline is connected with a main water inlet pipe positioned at the upstream of the precision filter; the first end of the second section of intermediate pipeline is also connected with the outlet of the flushing water pump, and the second end of the second section of intermediate pipeline is respectively connected with a first section of water outlet pipeline and a second section of water inlet pipeline through a tee joint; the control valve group comprises a washing water pump valve arranged on the washing pool connecting pipeline positioned at the upstream of the washing water pump, a two-section intermediate valve arranged on the two-section intermediate pipeline, a washing pipeline valve arranged on the front-arranged washing pipeline, a water inlet main pipe valve arranged on a water inlet main pipe positioned at the downstream of the high-pressure pump, and a two-section washing valve arranged on the two-section water inlet pipeline.
Preferably, the flushing device is characterized in that concentrated water side discharge ports of the first section of membrane device and the second section of membrane device are respectively connected with a first concentrated water side discharge pipeline and a second concentrated water side discharge pipeline, and the control valve group further comprises a first concentrated water side discharge valve and a second concentrated water side discharge valve which are respectively arranged on the first concentrated water side discharge pipeline and the second concentrated water side discharge pipeline.
The flushing device preferably further comprises a dosing device, the dosing device comprises a dosing tank, and the dosing tank is connected with the cleaning tank connecting pipeline through a dosing pump, a dosing pipeline and a dosing valve; and meanwhile, a front-mounted dosing flushing pipeline and a flushing valve are further arranged at the downstream of the two-section middle pipeline, the first end of the front-mounted dosing flushing pipeline is connected with an outlet of the flushing water pump, and the second end of the front-mounted dosing flushing pipeline is connected with a water inlet main pipe between the water inlet main pipe valve and one section of membrane device.
The flushing device is preferably provided with a static mixer on the cleaning pool connecting pipeline positioned at the downstream of the medicine feeding pipeline.
The flushing device is preferably provided with a sealing ring at two sides of each membrane element in the section of the membrane device.
The utility model discloses owing to take above technical scheme, it has following advantage: 1. the utility model discloses to reverse osmosis treatment surface water, sewage advanced treatment, in fields such as industry sewage recycle, two preceding membrane elements produce more serious stifled phenomenon of dirt in one section membrane device of multistage reverse osmosis membrane system, cause the problem that single membrane element pressure differential risees, a washing unit and method of multistage reverse osmosis membrane system are provided, it adopts forward washing and dense water side back flush, and cooperate germicide, organic solvent, acid, medicament such as aqueous alkali, the flow direction of flush fluid is controlled through control valve group, form water conservancy to each membrane element surface and erode, better scouring effect has, it is first to one section membrane device intake end very much, two pollution of membrane element have fine control action, the scouring effect has been improved greatly, and can reduce washing water yield and medicament quantity. 2. The utility model discloses when carrying out the backwash, the first membrane element of the direction of intaking is in the one side that is closest to washing the drainage for the accumulation is washed out multistage reverse osmosis membrane system by the sparge water more easily at its inside stifled thing of dirt, has improved the flushing effect, has prolonged multistage reverse osmosis membrane system's steady operation cycle.
Drawings
FIG. 1 is a schematic structural view of the flushing device of the present invention;
Fig. 2 is the structure schematic diagram of the flushing device after the chemical adding device is added.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.
As shown in fig. 1, the utility model provides a washing unit of multistage reverse osmosis membrane system, this multistage reverse osmosis membrane system include precision filter a, high-pressure pump b, one section membrane device c and two sections membrane device d that connect gradually, and this washing unit includes: the cleaning tank 1 is used for placing reverse osmosis product water; the inlet of the washing water pump 3 is connected with the washing tank 1 through a washing tank connecting pipeline 2; a section of the front flushing pipeline 4, wherein the first end of the section of the front flushing pipeline 4 is connected with an outlet of the flushing water pump 3, and the second end of the section of the front flushing pipeline 4 is connected with a main water inlet pipe positioned at the upstream of the precision filter a; the first end of the first-second-section intermediate pipeline 5 is also connected with the outlet of the flushing water pump 3, and the second end of the first-second-section intermediate pipeline 5 is respectively connected with a first-section water outlet pipeline and a second-section water inlet pipeline through a tee; and the control valve group comprises a washing water pump valve 7 arranged on the connecting pipeline 2 of the upstream washing pool of the washing water pump 3, a second intermediate valve 8 arranged on the second intermediate pipeline 5, a washing pipeline valve 9 arranged on the front washing pipeline 4, a water inlet main pipe valve 10 arranged on a water inlet main pipe positioned at the downstream of the high-pressure pump b, and a second washing valve 11 arranged on the second water inlet pipeline.
In the above embodiment, it is preferable that the concentrate side discharge ports of the first-stage membrane device c and the second-stage membrane device d are connected with the concentrate side discharge pipes 6 and 22, respectively.
In the above embodiment, it is preferable that the control valve group further includes the rich water side drain valves 12 and 13 provided on the rich water side drain pipes 6 and 22, respectively.
In the above embodiment, preferably, as shown in fig. 2, the flushing device further comprises a dosing device, the dosing device comprises a dosing tank 15, the dosing tank 15 is connected with the cleaning tank connecting pipeline 2 through a dosing pump 16, a dosing pipeline 17 and a dosing valve 18; meanwhile, a preposed medicine-adding flushing pipeline 20 and a flushing valve 21 are further arranged at the downstream of the second-section middle pipeline 5, the first end of the preposed medicine-adding flushing pipeline 20 is connected with an outlet of the flushing water pump 3, the second end of the preposed medicine-adding flushing pipeline 20 is connected with a water inlet main pipe between the water inlet main pipe valve 10 and the first-section membrane device c, and therefore liquid medicine directly enters the first-section membrane device c through the preposed medicine-adding flushing pipeline 20 and the flushing valve 21.
In the above embodiment, it is preferable that a static mixer 19 for sufficiently mixing the reverse osmosis product water and the chemical is further provided on the cleaning tank connection pipe 2 located downstream of the chemical feeding pipe 17.
In the above embodiment, it is preferable that the membrane elements in one membrane device c are each provided with a sealing ring 14 on both sides, thereby ensuring that the inlet water on either side can only enter from the membrane leaf sections of the membrane elements, so that the forward flushing and the backward flushing can be performed alternately.
The utility model discloses when using, its working process as follows:
1) When the water is washed in the forward direction, the washing water pump valve 7, the washing pipeline valve 9, the water inlet main pipe valve 10 and the second-stage washing valve 11 are opened, and the second-stage intermediate valve 8 is closed;
2) A flushing water pump 3 is started, flushing water passes through a cleaning tank connecting pipeline 2 and the flushing water pump 3 from a cleaning tank 1, is input into a water inlet main pipe from a section of preposed flushing pipeline 4, flows through a precision filter a and a high-pressure pump b and then sequentially flushes a section of membrane device c and a section of membrane device d so as to flush out pollutants such as organic matters, microorganisms and inorganic scaling substances adhered to the surfaces of membrane elements in the section of membrane device c and the section of membrane device d, concentrated water in the section of membrane device c and the section of membrane device d is replaced into purified water, and flushing wastewater flows into a wastewater tank from a concentrated water side discharge pipeline 22 and a concentrated water side discharge valve 13 in the section of membrane device d;
3) The back flush is carried out after the forward flush is finished, at the moment, the second section intermediate valve 8 is opened, the second section cleaning valve 11 is closed, the flushing water flows into each membrane element of the first section membrane device c in sequence through the cleaning pool connecting pipeline 2 and the flushing water pump 3 by the cleaning pool 1 and the second section intermediate pipeline 5, pollutants on the surface of each membrane element are back flushed, the pollutants are taken out of the first membrane element of the first section membrane device c, and the flushing wastewater flows into the wastewater pool through the concentrated water side discharge pipeline 6 and the concentrated water side discharge valve 12.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and those skilled in the art should understand that they can still make modifications or equivalent substitutions on the technical solutions of the present invention, but these modifications or equivalent substitutions can not depart from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. The utility model provides a washing unit of multistage reverse osmosis membrane system, this multistage reverse osmosis membrane system is including precision filter (a), high-pressure pump (b), one section membrane device (c) and two sections membrane device (d) that connect gradually, and its characterized in that, this washing unit includes:
The cleaning pool (1) is used for placing reverse osmosis product water;
The inlet of the washing water pump (3) is connected with the washing pool (1) through a washing pool connecting pipeline (2);
A section of pre-flushing pipeline (4), wherein the first end of the section of pre-flushing pipeline (4) is connected with the outlet of the flushing water pump (3), and the second end of the section of pre-flushing pipeline (4) is connected with a main water inlet pipe positioned at the upstream of the precision filter (a);
The first end of the second section middle pipeline (5) is also connected with the outlet of the flushing water pump (3), and the second end of the second section middle pipeline (5) is respectively connected with a first section water outlet pipeline and a second section water inlet pipeline through a tee;
The control valve group comprises a washing water pump valve (7) arranged on the upstream of the washing water pump (3) on the washing pool connecting pipeline (2), a two-section intermediate valve (8) arranged on the two-section intermediate pipeline (5), a washing pipeline valve (9) arranged on the front-arranged washing pipeline (4), a water inlet main pipe valve (10) arranged on the water inlet main pipe on the downstream of the high-pressure pump (b), and a two-section washing valve (11) arranged on the two-section water inlet pipeline.
2. The flushing device according to claim 1, characterized in that a first concentrate side discharge conduit (6) and a second concentrate side discharge conduit (22) are connected to the concentrate side discharge ports of the first stage membrane device (c) and the second stage membrane device (d), respectively, and the control valve group further comprises a first concentrate side discharge valve (12) and a second concentrate side discharge valve (13) provided on the first concentrate side discharge conduit (6) and the second concentrate side discharge conduit (22), respectively.
3. The flushing device according to claim 2, characterized in that it further comprises a dosing device, said dosing device comprising a dosing tank (15), said dosing tank (15) being connected to said washing tank connection pipe (2) by means of a dosing pump (16), a dosing pipe (17) and a dosing valve (18); simultaneously, the low reaches of pipeline (5) still are provided with leading medicine washing pipeline (20) and flush valve (21) in the middle of a two-section, the first end of leading medicine washing pipeline (20) is connected the export of washing water pump (3), the second end of leading medicine washing pipeline (20) is connected the main pipe of intaking between water main pipe valve (10) and one section membrane device (c) of intaking is responsible for.
4. The flushing device according to claim 3, characterized in that a static mixer (19) is also provided on the cleaning tank connection pipe (2) downstream of the dosing pipe (17).
5. A flushing device according to claim 1, characterized in that a sealing ring (14) is mounted on both sides of each membrane element in the length of membrane device (c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921608269.2U CN211189776U (en) | 2019-09-25 | 2019-09-25 | Flushing device of multi-section reverse osmosis membrane system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921608269.2U CN211189776U (en) | 2019-09-25 | 2019-09-25 | Flushing device of multi-section reverse osmosis membrane system |
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| CN211189776U true CN211189776U (en) | 2020-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652882A (en) * | 2019-09-25 | 2020-01-07 | 金科环境股份有限公司 | Flushing device and method for multi-section reverse osmosis membrane system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110652882A (en) * | 2019-09-25 | 2020-01-07 | 金科环境股份有限公司 | Flushing device and method for multi-section reverse osmosis membrane system |
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