CN104402094A - Energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes and application of water treatment system - Google Patents
Energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes and application of water treatment system Download PDFInfo
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- CN104402094A CN104402094A CN201410784846.9A CN201410784846A CN104402094A CN 104402094 A CN104402094 A CN 104402094A CN 201410784846 A CN201410784846 A CN 201410784846A CN 104402094 A CN104402094 A CN 104402094A
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes. The energy-saving and pollution-resisting water treatment system comprises a raw water tank, a main raw water pipeline, a main produced water pipeline, a main concentrate water pipeline and a plurality of RO membrane elements connected in parallel, wherein produced water of the RO membrane elements converges at the main produced water pipeline, concentrate water of the RO membrane elements converges at the main concentrate water pipeline, a system water inlet valve 1 is arranged on each branch raw mater pipeline, and a concentrate water reflux valve 2 and a concentrate water control valve 3 are arranged on each branch concentrate water pipeline; and the water treatment system further comprises compressed air pipelines converged with the branch raw water pipelines. The water treatment system adopts a mode of total parallel connection of single membrane elements, and the operation energy consumption is lower; and the operation mode of intermittent water production and intermittent air-water joint flushing is adopted, and the recovery rate of the system can reach 80%-90%.
Description
[technical field]
The present invention relates to water treating equipment, particularly a kind of energy-conservation resistant to pollution reverse-osmosis film water treatment system, and the application of described water treatment system.
[background technology]
Reverse osmosis (RO) is a kind of membrane separation technique, former water passes through reverse osmosis membrane under the effect of high pressure, solvent in water to be spread to lower concentration by high density and reaches separations, purification, the object that concentrates, to remove bacterium in water, virus, colloid, organism and solvability salt.The method has simple to operate, the feature such as level of automation is high, stable effluent quality, but also there is the shortcomings such as operating pressure is high, film easily pollutes.
Conventional reverse osmosis water treatment system adopts multi-stage series to design substantially, and the more rate of recovery of membrane element of series winding are higher.During multistratum system arrangement, the dense water of first paragraph is as the water inlet of second segment, the dense water of second segment as the 3rd section water inlet by that analogy, the water inlet part of every section becomes product water, the flooding velocity of latter one section can reduce, saltiness can raise, so the membrane element quantity of back segment is fewer than the membrane element quantity of the preceding paragraph, to ensure normal flooding velocity.In addition, all there is certain pressure loss when former water is by often propping up membrane element, and the concentration entering the water of next membrane element can strengthen gradually, causes the water production rate of film in same section of system to reduce successively.Therefore, conventional reverse osmosis water treatment system needs larger intake pressure just can overcome the corresponding pressure-losses flowing through every membrane element and produce.
In addition, for the multistratum system of series winding, because the concentration of the water entering next film strengthens gradually, the water production rate of film in same section of system is caused to reduce successively.The influent concentration of each film is different with intake pressure, can aggravate the contaminated degree of membrane element.
[summary of the invention]
The object of the invention is to overcome prior art deficiency, the water treatment system that a kind of intake pressure is little, the contamination resistance of membrane element is strong is provided.
To achieve these goals, the invention provides a kind of energy-conservation resistant to pollution reverse-osmosis film water treatment system, described water treatment system comprises raw water box, the total raw water tubes road be connected with described raw water box, total water producing pipe road and total dense water lines, described total dense water lines feeds back to described raw water box, described total raw water tubes road is provided with multichannel and props up raw water tubes road, described water producing pipe road is provided with multichannel and props up water producing pipe road, described total dense water lines is provided with multichannel and props up dense water lines, wherein, described water treatment system comprises multiple reverse-osmosis membrane elements in parallel, original water inlet and a road of each reverse-osmosis membrane element are propped up raw water tubes road and are connected, the product mouth of a river of each reverse-osmosis membrane element converges to described total water producing pipe road by a water producing pipe road, the concentrated water spout of each reverse-osmosis membrane element converges to described total dense water lines by a dense water lines, described total raw water tubes road is provided with high-pressure pump, each road is propped up on raw water tubes road and is equipped with system water intaking valve 1, each Lu Zhinong water lines is equipped with concentrate recirculation valve 2 and dense water regulating valve 3, described water treatment system also has compressed and multiplexed airline, and each road pneumatic line props up raw water tubes road with each road respectively and converges, and is connected to system water intaking valve 1.
According to one preferred embodiment, each Lu Zhinong water lines is also provided with the outer row pipeline of wash-down water, the outer row pipeline of described wash-down water is provided with wash-down water discharging valve 4.
More preferably, each road pneumatic line is equipped with air purge valve 5.
In the present invention, multiple reverse-osmosis membrane elements of described parallel connection have 6 ~ 20.
The present invention also provides the operation method of above-mentioned water treatment system, and described method is circulated by following steps and carries out:
A produces water
Open system water intaking valve 1, concentrate recirculation valve 2 and dense water regulating valve 3, close wash-down water discharging valve 4 and air purge valve 5;
Input former water by high-pressure pump to described reverse-osmosis membrane element, the former water intake pressure making reverse-osmosis membrane element is 0.3-0.4Mpa, maintenance work time 6 ~ 10min;
B gas, water wash away
The open degree of keeping system water intaking valve 1 and dense water regulating valve 3 is constant; Close concentrate recirculation valve 2, open wash-down water discharging valve 4 and air purge valve 5;
Reverse-osmosis membrane element surface 10 ~ 30s is washed away by former water and pressurized air.
According to operation method of the present invention, in steps A, the rate of recovery of each reverse-osmosis membrane element is 85-90%.
In the present invention, average single the film rate of recovery=water production rate/(water production rate+dense water yield) × 100%
In the present invention, in steps A by regulation system water intaking valve 1 with dense water regulating valve 3 to control former water water feeding pressure.
According to one preferred embodiment, the pressurized air of step B is oil-free compressed air.
The mode that water treatment system of the present invention adopts single membrane element all in parallel, save in traditional technology the corresponding pressure-losses overcoming and flow through and often prop up membrane element and produce, intake pump lift is lower, and operation energy consumption is lower.
Adopt interval to produce water, interval is carried out air water and combined flushing operation scheme, single film can short-term operation under the rate of recovery condition of 85-95%; The rate of recovery of system can be improved to 80-90% while raising system antifouling property.
Adopt interval air water associating backwashing manner, system normal water outlet 6-10 minute in membrane element be in micro-pollution, film surface allows to produce concentration polarization, elapsed time is short, air water combines flushing based on the turbulent erosion of aqueous vapor, effectively removes the Micropollutants on film surface and effectively destroys the concentration polarization of film surface generation, making film return to initial degree, the contamination resistance of effective enhanced system, reduces matting frequency.
[accompanying drawing explanation]
Fig. 1 is membrane element annexation schematic diagram in parallel in water treatment system of the present invention;
Fig. 2 is the annexation schematic diagram of single membrane element in water treatment system of the present invention;
Wherein, 1, system water intaking valve; 2, concentrate recirculation valve; 3, dense water regulating valve; 4, wash-down water discharging valve; 5, air purge valve; 6, raw water box; 7, high-pressure pump.
[embodiment]
Following examples are used for explaining technical scheme of the present invention without limitation.Those skilled in the art can use for reference content of the present invention, the links such as appropriate change structure, annexation, material, parameter, size, technique realize other object corresponding, its relevant change does not all depart from content of the present invention, all similar replacements and change will become apparent to those skilled in the art that and all should be deemed to be included within scope of the present invention.
Embodiment 1
Water treatment system as shown in Figure 1, 2, comprises the raw water box for storing former water, and raw water box is connected respectively to total raw water tubes road and total dense water lines (for feeding back the dense water of reverse-osmosis membrane element to raw water box).
10 reverse-osmosis membrane elements are arranged in parallel, and are connected respectively to a respective raw water tubes road, a water producing pipe road and a dense water lines, and a dense water lines and a water producing pipe road are converged respectively for total dense water lines and total water producing pipe road.
Prop up on raw water tubes road and arrange system water intaking valve 1, a raw water tubes road is converged in the upstream of system water intaking valve 1 and pneumatic line, to obtain the air-water mixture for rinsing.
Prop up in dense water lines and concentrate recirculation valve 2 and dense water regulating valve 3 are set.In addition, prop up in dense water lines and be also provided with the outer row pipeline of wash-down water and wash-down water discharging valve 4.
During system cloud gray model, first open system water intaking valve 1, concentrate recirculation valve 2 and dense water regulating valve 3, close wash-down water discharging valve 4 and air purge valve 5.Input former water by high-pressure pump to each reverse-osmosis membrane element, the former water intake pressure making reverse-osmosis membrane element is 0.38Mpa, maintenance work time 6min.Then enter air water and wash away the stage, the open degree of keeping system water intaking valve 1 and dense water regulating valve 3 is constant, closes concentrate recirculation valve 2, opens wash-down water discharging valve 4 and air purge valve 5.Reverse-osmosis membrane element surface 20s is washed away by air-water mixture.
Make above-mentioned steps circular flow by automatic control program, regularly carry out data gathering; Service data is as follows:
Intake pressure 0.38Mpa.During normal product water, flooding velocity 147L/h, concentrated stream amount 14L/h, produce discharge 125L/h.
6 minutes working times, therefore single film normally produces water one-period flooding quantity 14.7L, dense water yield 1.4L, water production rate 12.5L; Average single the film rate of recovery=water production rate/(water production rate+dense water yield) × 100%=90%;
When gas, water wash away, flooding velocity 396L/h, charge flow rate 0.8Nm
3/ h, 20 seconds working times, adds up to washing water quantity=2.2L;
Water production rate in system recoveries rate=one-period/(in one-period inside and outside water production rate+one-period water displacement) × 100%
Water production rate=12.5L during water production rate in one-period=normal product water;
Water displacement=washing water quantity=2.2L inside and outside one-period
System recoveries rate=12.5/ (12.5+2.2) × 100%=85%
Visible, the system of embodiment 1 has high-recovery.
On the other hand, native system intake pressure 0.38Mpa, obviously (being about 37%) is reduced than the 0.6Mpa (being minimum operating pressure substantially) of traditional technology, therefore have energy-saving effect when identical flooding velocity, after operating pressure reduces, corresponding facility investment also can reduce.
In addition, said system adopts interval air water associating backwashing manner, in system normal filtration 6 minutes, membrane element is in micro-pollution, film surface allows to produce concentration polarization, and elapsed time is short, and air water combines flushing based on the turbulent erosion of aqueous vapor, effectively remove the Micropollutants on film surface and effectively destroy the concentration polarization of film surface generation, making film return to initial degree.
Due to system cloud gray model cycle short (6 minutes 20 seconds), after each air-water flushing program, the pollutent on film surface is all washed, so system can steady in a long-termly be run, and the contamination resistance of effective raising system.
Native system continuous and steady operation 6 moonsets, without the need to carrying out matting, illustrate that native system has unfailing performance.
Claims (8)
1. an energy-conservation resistant to pollution reverse-osmosis film water treatment system, described water treatment system comprises raw water box, the total raw water tubes road be connected with described raw water box, total water producing pipe road and total dense water lines, described total dense water lines feeds back to described raw water box, described total raw water tubes road is provided with multichannel and props up raw water tubes road, described water producing pipe road is provided with multichannel and props up water producing pipe road, described total dense water lines is provided with multichannel and props up dense water lines, it is characterized in that described water treatment system comprises multiple reverse-osmosis membrane elements in parallel, original water inlet and a road of each reverse-osmosis membrane element are propped up raw water tubes road and are connected, the product mouth of a river of each reverse-osmosis membrane element converges to described total water producing pipe road by a water producing pipe road, the concentrated water spout of each reverse-osmosis membrane element converges to described total dense water lines by a dense water lines, described total raw water tubes road is provided with high-pressure pump, each road is propped up on raw water tubes road and is equipped with system water intaking valve (1), each Lu Zhinong water lines is equipped with concentrate recirculation valve (2) and dense water regulating valve (3), described water treatment system also has compressed and multiplexed airline, and each road pneumatic line props up raw water tubes road with each road respectively and converges, and is connected to system water intaking valve (1).
2. water treatment system according to claim 1, it is characterized in that each Lu Zhinong water lines being also provided with the outer row pipeline of wash-down water, the outer row pipeline of described wash-down water is provided with wash-down water discharging valve (4).
3. water treatment system according to claim 1, is characterized in that each road pneumatic line is equipped with air purge valve (5).
4. water treatment system according to claim 1, is characterized in that multiple reverse-osmosis membrane elements of described parallel connection have 6 ~ 20.
5. the operation method of the water treatment system any one of claim 1-3 described in claim, it is characterized in that is circulated by following steps carries out:
A produces water
Open system water intaking valve (1), concentrate recirculation valve (2) and dense water regulating valve (3), close wash-down water discharging valve (4) and air purge valve (5);
Input former water by high-pressure pump to described reverse-osmosis membrane element, the former water intake pressure making reverse-osmosis membrane element is 0.3-0.4Mpa, maintenance work time 6 ~ 10min;
B gas, water wash away
The open degree of keeping system water intaking valve (1) and dense water regulating valve (3) is constant; Close concentrate recirculation valve (2), open wash-down water discharging valve (4) and air purge valve (5);
Reverse-osmosis membrane element surface 10 ~ 30s is washed away by former water and pressurized air.
6. operation method according to claim 4, is characterized in that the rate of recovery of each reverse-osmosis membrane element in steps A is 85-95%.
7. operation method according to claim 4, to is characterized in that in steps A by regulation system water intaking valve (1) and dense water regulating valve (3) to control former water water feeding pressure.
8. operation method according to claim 4, is characterized in that the pressurized air of step B is oil-free compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784846.9A CN104402094A (en) | 2014-12-17 | 2014-12-17 | Energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes and application of water treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784846.9A CN104402094A (en) | 2014-12-17 | 2014-12-17 | Energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes and application of water treatment system |
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| CN104402094A true CN104402094A (en) | 2015-03-11 |
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| CN201410784846.9A Pending CN104402094A (en) | 2014-12-17 | 2014-12-17 | Energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes and application of water treatment system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104971675A (en) * | 2015-04-10 | 2015-10-14 | 江苏氢阳能源有限公司 | Insert layer type reaction device for dehydrogenation reaction of liquid hydrogen source material |
| CN106955598A (en) * | 2017-04-21 | 2017-07-18 | 江苏坤奕环境工程有限公司 | The open runner network pipe type high pressure reverse osmosis membrane assembly of super-pressure |
| CN108557957A (en) * | 2018-06-29 | 2018-09-21 | 天津凯英科技发展股份有限公司 | A kind of processing of stone integrated sewage treating apparatus and its processing method |
| CN111362360A (en) * | 2020-03-24 | 2020-07-03 | 深圳市为开环保科技有限公司 | Membrane method internal circulation concentration method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452704A (en) * | 2010-11-01 | 2012-05-16 | 中国石油化工股份有限公司 | Anti-pollution reverse osmosis device and use method thereof |
| CN103301753A (en) * | 2013-07-09 | 2013-09-18 | 中国海洋大学 | Washing method for preventing reverse osmosis membrane or nano-filtration membrane from being polluted |
-
2014
- 2014-12-17 CN CN201410784846.9A patent/CN104402094A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452704A (en) * | 2010-11-01 | 2012-05-16 | 中国石油化工股份有限公司 | Anti-pollution reverse osmosis device and use method thereof |
| CN103301753A (en) * | 2013-07-09 | 2013-09-18 | 中国海洋大学 | Washing method for preventing reverse osmosis membrane or nano-filtration membrane from being polluted |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104971675A (en) * | 2015-04-10 | 2015-10-14 | 江苏氢阳能源有限公司 | Insert layer type reaction device for dehydrogenation reaction of liquid hydrogen source material |
| CN106955598A (en) * | 2017-04-21 | 2017-07-18 | 江苏坤奕环境工程有限公司 | The open runner network pipe type high pressure reverse osmosis membrane assembly of super-pressure |
| CN108557957A (en) * | 2018-06-29 | 2018-09-21 | 天津凯英科技发展股份有限公司 | A kind of processing of stone integrated sewage treating apparatus and its processing method |
| CN108557957B (en) * | 2018-06-29 | 2023-10-24 | 天津凯英科技发展股份有限公司 | Stone processing integrated sewage treatment device and treatment method thereof |
| CN111362360A (en) * | 2020-03-24 | 2020-07-03 | 深圳市为开环保科技有限公司 | Membrane method internal circulation concentration method |
| CN111362360B (en) * | 2020-03-24 | 2022-05-24 | 深圳市为开环保科技有限公司 | Membrane method internal circulation concentration method |
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Application publication date: 20150311 |