CN104548938A - Membrane component pressure protection structure, reverse osmosis system and sewage treatment equipment - Google Patents
Membrane component pressure protection structure, reverse osmosis system and sewage treatment equipment Download PDFInfo
- Publication number
- CN104548938A CN104548938A CN201410726886.8A CN201410726886A CN104548938A CN 104548938 A CN104548938 A CN 104548938A CN 201410726886 A CN201410726886 A CN 201410726886A CN 104548938 A CN104548938 A CN 104548938A
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- China
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- pressure
- buffer device
- membrane module
- pressure buffer
- reverse osmosis
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a membrane component pressure protection structure, a reverse osmosis system and sewage treatment equipment. The membrane inlet pressure fluctuation of the reverse osmosis system is buffered, and a water hammer effect of the reverse osmosis system is reduced, so that the membrane component is protected, and the service life of the equipment is prolonged. The membrane component pressure protection structure comprises a low-pressure buffer device and a high-pressure buffer device arranged on a fluid pipeline in front of the membrane component inlet, wherein the working pressure of the low-pressure buffer device ranges from P11 to P12; the working pressure of the high-pressure buffer device ranges from P21 to P22; and a relation of P11<P21<P12<P22 is met. When large pressure fluctuation is generated by emergency power shutoff and other reasons in the system, the pressure fluctuation can be buffered by virtue of the membrane component pressure protection structure, the membrane inlet pressure fluctuation is reduced, and the water hammer effect is reduced, so that the membrane component is protected, and the service life of the equipment is prolonged.
Description
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of membrane module pressure protect structure and reverse osmosis system, sewage disposal device.
Background technology
Physical chemistry treatment technology, rayed technology and membrane separation technique are called as three large water technologies.Wherein, membrane separation technique is by the difference of film to the selected area update strategy effect of component each in mixture, with outside energy or chemical potential difference for the liquid of impellent to two component or multicomponent mixture be separated, classification, purification and enrichment method.And reverse osmosis membrane separation technology is as the modern technique of world today's water treatment, there is the advantages such as clean, efficient, pollution-free, be widely used in sea water desaltination, city water process, pure water and ultrapure water preparation, municipal effluent and utilization, Industrial Wastewater Treatment, Spent Radioactive water treatment etc.
For the process of percolate from garbage filling field, if reach national grade one discharge standard, two-stage DTRO (Disc Tube Reverse Osmosis is generally provided, disc tube reverse osmosis (dt-ro), be called for short DTRO) treatment system, sewage disposal device comprises master control system, sand-bed filter, first-stage reverse osmosis system, two-stage reverse osmosis system, percolate storage tank, sulfuric acid storage tank, water purification storage tank, clean-out system storage tank, degassing tower etc.Membrane module, as the core component of reverse osmosis system, mainly comprises disc-type diaphragm, flow guiding disc, O type rubber ring, center pull rod and pressure jacket.
Reverse osmosis system is according to different operation conditions, and its operating pressure variation range is also larger.For making membrane module normally run, entering film pressure (pressure when namely fluid enters membrane module) should steadily and be no more than the working pressure range of permission.As shown in Figure 1, the membrane module pressure protect structure of application at present, is on the fluid line 4 before membrane module import, accesses an energy storage 1 by tube stub 2 and threaded connector 3.Energy storage 1 can fluid pressure cushion, thus reduces the fluctuation into film pressure.
The defect that prior art exists is, energy storage is after installing, its Preliminary pressure-filled just can not regulate again, because the operating pressure scope of energy storage is relatively little, when there is larger change in the operating pressure of system, energy storage just can not play good shock absorption to pressure surge, its consequence is, there is serious water hammer effect and (refer to that fluid is in course of conveying in system, suddenly open due to valve or close, pump stops suddenly, suddenly the reasons such as stator are opened and closed, cause flow velocity that change suddenly occurs, pressure produces the phenomenon of fluctuation simultaneously), thus cause the damage of the parts such as membrane module.
Summary of the invention
Embodiments provide a kind of membrane module pressure protect structure and reverse osmosis system, sewage disposal device, fluctuate with the film pressure of entering cushioning reverse osmosis system, reduce the water hammer effect of reverse osmosis system, thus protective membrane assembly, the work-ing life of extension device.
The membrane module pressure protect structure that the embodiment of the present invention provides, comprising: be arranged at the low pressure buffer device on the fluid line before membrane module import and high-pressure buffer device, and the operating pressure scope of described low pressure buffer device is [P
11, P
12], the operating pressure scope of described high-pressure buffer device is [P
21, P
22], wherein, P
11< P
21< P
12< P
22.
In the technical scheme of the embodiment of the present invention, when the operating pressure of reverse osmosis system is in [P
11, P
21) time, low pressure buffer device works, and high-pressure buffer device is in conducting state; When the operating pressure of reverse osmosis system is in [P
21, P
12) time, low pressure buffer device and high-pressure buffer device work simultaneously; When the operating pressure of reverse osmosis system is in [P
12, P
22] time, high-pressure buffer device works, and low pressure buffer device is in conducting state.Compared to existing technology, the operating pressure scope of two pressure buffer device collaborative works is comparatively large, this pressure change operating mode making membrane module pressure protect structure can adapt in a big way, still can normally work when system pressure changes greatly.When system produces larger pressure surge because of the reason such as to shut off power in emergency, membrane module pressure protect structure can cushion pressure surge, reduces, into film pressure fluctuation, to reduce water hammer effect, thus protective membrane assembly, the work-ing life of extension device.
Concrete, the minimum operating pressure P of described low pressure buffer device
11=P
10, the maximum operating pressure P of described low pressure buffer device
12=4P
10, wherein, P
10for the Preliminary pressure-filled of low pressure buffer device;
The minimum operating pressure P of described high-pressure buffer device
21=P
20, the maximum operating pressure P of described high-pressure buffer device
22=4P
20, wherein, P
20for the Preliminary pressure-filled of high-pressure buffer device.
Concrete, the Preliminary pressure-filled P of described low pressure buffer device
10=0.8Pw
min, wherein, Pw
minfor the minimum operating pressures that reverse osmosis system allows;
The Preliminary pressure-filled P of described high-pressure buffer device
20=0.375Pw
max, wherein, Pw
maxfor the maximum working pressure (MWP) that reverse osmosis system allows.
Preferably, membrane module pressure protect structure also comprises: be arranged on the fluid line before membrane module import, and compares low pressure buffer device and high-pressure buffer device more near the check valve of membrane module import.Check valve only allows fluid uniflux in fluid line, and when system emergency has a power failure or the pressure of pump discharge reduces instantaneously, check valve can effectively anti-fluid backflow, thus reduces water hammer effect, avoids membrane module to damage because bearing negative pressure.
Optionally, described low pressure buffer device comprises energy storage or deoscillator; Described high-pressure buffer device comprises energy storage or deoscillator.
Optionally, described fluid line comprises fluid pipeline or gas pipeline.
The embodiment of the present invention additionally provides a kind of reverse osmosis system, comprises the membrane module pressure protect structure described in aforementioned arbitrary technical scheme.The water hammer effect of this reverse osmosis system is less, and the work-ing life of membrane module is longer.
The embodiment of the present invention additionally provides a kind of sewage disposal device, comprises the reverse osmosis system described in preceding solution.The work-ing life of this sewage disposal device is longer.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing membrane module pressure protect structure;
Fig. 2 is the schematic diagram of the membrane module pressure protect structure of the embodiment of the present invention;
Fig. 3 is system working pressure P
w∈ [P
11, P
21) time membrane module pressure protect structure fundamental diagram;
Fig. 4 is system working pressure P
w∈ [P
21, P
12) time membrane module pressure protect structure fundamental diagram;
Fig. 5 is system working pressure P
w∈ [P
12, P
22] time membrane module pressure protect structure fundamental diagram.
Reference numeral:
1-energy storage
2-tube stub
3-threaded connector
4-fluid line
5-low pressure buffer device
6-high-pressure buffer device
7-check valve
8-pump
9-sloper
Embodiment
In order to reduce the water hammer effect of reverse osmosis system, protective membrane assembly, in the work-ing life of extension device, embodiments provides a kind of membrane module pressure protect structure and reverse osmosis system, sewage disposal device.In the technical scheme of the embodiment of the present invention; membrane module pressure protect structure comprises low pressure buffer device on the fluid line that is arranged at before membrane module import and high-pressure buffer device; the operating pressure scope of two pressure buffer device collaborative works is larger; this pressure change operating mode making membrane module pressure protect structure can adapt in a big way, still can normally work when system pressure changes greatly.When system produces larger pressure surge because of the reason such as to shut off power in emergency, membrane module pressure protect structure can cushion pressure surge, reduces, into film pressure fluctuation, to reduce water hammer effect, thus protective membrane assembly, the work-ing life of extension device.
The present invention is described with reference to the accompanying drawings below with specific embodiment.
As shown in Figure 2, the membrane module pressure protect structure that one embodiment of the invention provides, comprising: be arranged at the low pressure buffer device 5 on the fluid line 4 before membrane module import and high-pressure buffer device 6, and the operating pressure scope of low pressure buffer device 5 is [P
11, P
12], the operating pressure scope of high-pressure buffer device 6 is [P
21, P
22], wherein, P
11< P
21< P
12< P
22.
In Fig. 2, the direction of arrow represents reverse osmosis system fluid flow direction in normal conditions.The particular type of low pressure buffer device 5 and high-pressure buffer device 6 is not limit, and such as, can adopt energy storage or deoscillator etc., deoscillator specifically can adopt damping of pulsation vibroshock.The concrete installation site of low pressure buffer device 5 and high-pressure buffer device 6 is not limit, and such as, both compare, low pressure buffer device can be arranged distance membrane module import comparatively near, also high-pressure buffer device can be arranged the import of distance membrane module nearer.Low pressure buffer device 5 and high-pressure buffer device 6 specifically can access on the fluid line 4 before membrane module import by tube stub 2 and threaded connector 3, as shown in Figure 2.
Concrete, as shown in Figure 3, as the operating pressure P of reverse osmosis system
w∈ [P
11, P
21) time, low pressure buffer device 5 is in running order, and high-pressure buffer device 6 is in conducting state (namely high-pressure buffer device 6 is in off-position).Low pressure buffer device 5 can cushion system pressure and compensate, thus reduces the fluctuation into film pressure, carries out effective pressure protect to membrane module.
As shown in Figure 4, as the operating pressure P of reverse osmosis system
w∈ [P
21, P
12) time, low pressure buffer device 5 and high-pressure buffer device 6 all in running order.Low pressure buffer device 5 and high-pressure buffer device 6 work simultaneously, cushion and compensate system pressure, thus reduce the fluctuation into film pressure, carry out effective pressure protect to membrane module.
As shown in Figure 5, as the operating pressure P of reverse osmosis system
w∈ [P
12, P
22] time, high-pressure buffer device 6 is in running order, and low pressure buffer device 5 is in conducting state (namely low pressure buffer device 5 is in off-position).High-pressure buffer device 6 can cushion system pressure and compensate, thus reduces the fluctuation into film pressure, carries out effective pressure protect to membrane module.
Operating pressure scope [the P of low pressure buffer device 5
11, P
12], and the operating pressure scope [P of high-pressure buffer device 6
21, P
22], specifically can determine in the following way:
First, according to work condition environment and the correlation test data of reverse osmosis system, the minimum operating pressures that reverse osmosis system allows and maximum working pressure (MWP) is determined.
Then, the minimum operating pressures that allowed according to reverse osmosis system and maximum working pressure (MWP), determine the Preliminary pressure-filled of low pressure buffer device and the Preliminary pressure-filled of high-pressure buffer device.Concrete, the Preliminary pressure-filled P of low pressure buffer device
10=0.8Pw
min, Pw
minfor the minimum operating pressures that reverse osmosis system allows; The Preliminary pressure-filled P of high-pressure buffer device
20=0.375Pw
max, Pw
maxfor the maximum working pressure (MWP) that reverse osmosis system allows.
Finally, according to the Preliminary pressure-filled of low pressure buffer device, determine the minimum operating pressure of low pressure buffer device and maximum operating pressure; According to the Preliminary pressure-filled of high-pressure buffer device, determine the minimum operating pressure of high-pressure buffer device and maximum operating pressure.Concrete, the minimum operating pressure P of low pressure buffer device
11=P
10, the maximum operating pressure P of low pressure buffer device
12=4P
10, P
10for the Preliminary pressure-filled of low pressure buffer device; The minimum operating pressure P of high-pressure buffer device
21=P
20, the maximum operating pressure P of high-pressure buffer device
22=4P
20, P
20for the Preliminary pressure-filled of high-pressure buffer device.So far, the operating pressure scope [P of low pressure buffer device can be determined
11, P
12], and the operating pressure scope [P of high-pressure buffer device
21, P
22].
Can find out, the operating pressure scope of two pressure buffer device collaborative works is [P
11, P
22], this operating pressure scope is greater than the operating pressure scope of single energy storage work.Therefore, membrane module pressure protect structure can adapt to pressure change operating mode in a big way, still can normally work when system pressure changes greatly.When system produces larger pressure surge because of the reason such as to shut off power in emergency, membrane module pressure protect structure can cushion pressure surge, reduces, into film pressure fluctuation, to reduce water hammer effect, thus protective membrane assembly, the work-ing life of extension device.
As shown in Figures 2 to 5; in a preferred embodiment of the invention; membrane module pressure protect structure also can comprise: be arranged on the fluid line 4 before membrane module import, and compares low pressure buffer device 5 with high-pressure buffer device 6 more near the check valve 7 (outlet of check valve 7 is communicated with fluid line 4 by sloper 9) of membrane module import.7, check valve allows fluid uniflux in fluid line, and when the pressure that system emergency has a power failure or pump 8 exports reduces instantaneously, check valve 7 can effectively anti-fluid reflux, thus reduces water hammer effect, avoids membrane module to damage because bearing negative pressure.
When membrane module pressure protect structure is applied to the reverse osmosis system of sewage disposal device, fluid line is fluid pipeline.It is worth mentioning that, based on similar principle, membrane module pressure protect structure also can be applied to the air-channel system (fluid line is gas pipeline) needing to carry out pressure buffer.
The embodiment of the present invention additionally provides a kind of reverse osmosis system, comprises the membrane module pressure protect structure of aforementioned any embodiment.Two pressure buffer device collaborative works, operating pressure scope is comparatively large, thus can the pressure surge larger to system cushion, and reduces water hammer effect, therefore extends the work-ing life of membrane module.
The embodiment of the present invention additionally provides a kind of sewage disposal device, comprises the reverse osmosis system of previous embodiment.Membrane module in this sewage disposal device is protected by the pressure buffer of membrane module pressure protect structure, not fragile, and therefore, the work-ing life of sewage disposal device is longer.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a membrane module pressure protect structure, is characterized in that, comprising: be arranged at the low pressure buffer device on the fluid line before membrane module import and high-pressure buffer device, and the operating pressure scope of described low pressure buffer device is [P
11, P
12], the operating pressure scope of described high-pressure buffer device is [P
21, P
22], wherein, P
11< P
21< P
12< P
22.
2. membrane module pressure protect structure as claimed in claim 1, is characterized in that,
The minimum operating pressures that P of described low pressure buffer device
11=P
10, the maximum working pressure (MWP) P of described low pressure buffer device
12=4P
10, wherein, P
10for the Preliminary pressure-filled of low pressure buffer device;
The minimum operating pressures that P of described high-pressure buffer device
21=P
20, the maximum working pressure (MWP) P of described high-pressure buffer device
22=4P
20, wherein, P
20for the Preliminary pressure-filled of high-pressure buffer device.
3. membrane module pressure protect structure as claimed in claim 2, is characterized in that,
The Preliminary pressure-filled P of described low pressure buffer device
10=0.8Pw
min, wherein, Pw
minfor the minimum operating pressures that reverse osmosis system allows;
The Preliminary pressure-filled P of described high-pressure buffer device
20=0.375Pw
max, wherein, Pw
maxfor the maximum working pressure (MWP) that reverse osmosis system allows.
4. membrane module pressure protect structure as claimed in claim 1, is characterized in that, also comprise: be arranged on the fluid line before membrane module import, and compares low pressure buffer device and high-pressure buffer device more near the check valve of membrane module import.
5. membrane module pressure protect structure as claimed in claim 1, it is characterized in that, described low pressure buffer device comprises energy storage or deoscillator; Described high-pressure buffer device comprises energy storage or deoscillator.
6. the membrane module pressure protect structure as described in any one of Claims 1 to 5, it is characterized in that, described fluid line comprises fluid pipeline or gas pipeline.
7. a reverse osmosis system, is characterized in that, comprises the membrane module pressure protect structure as described in any one of Claims 1 to 5.
8. a sewage disposal device, is characterized in that, comprises reverse osmosis system as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726886.8A CN104548938A (en) | 2014-12-03 | 2014-12-03 | Membrane component pressure protection structure, reverse osmosis system and sewage treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726886.8A CN104548938A (en) | 2014-12-03 | 2014-12-03 | Membrane component pressure protection structure, reverse osmosis system and sewage treatment equipment |
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| Publication Number | Publication Date |
|---|---|
| CN104548938A true CN104548938A (en) | 2015-04-29 |
Family
ID=53066651
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410726886.8A Pending CN104548938A (en) | 2014-12-03 | 2014-12-03 | Membrane component pressure protection structure, reverse osmosis system and sewage treatment equipment |
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| DE102011115057A1 (en) * | 2011-10-07 | 2013-04-11 | Robert Bosch Gmbh | Water treatment plant comprises processing device used for treatment of water, which is supplied to the processing device with a pressure in a desired pressure range, and a pressure stabilizer comprising energy converter |
| CN202924841U (en) * | 2012-11-26 | 2013-05-08 | 山东山大能源环境有限公司 | Wind pressure device applicable to reverse osmosis desalination |
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-
2014
- 2014-12-03 CN CN201410726886.8A patent/CN104548938A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789153A (en) * | 2001-04-05 | 2006-06-21 | 东丽株式会社 | Water treatment method |
| CN2820839Y (en) * | 2005-07-12 | 2006-09-27 | 浙江四通环境工程有限公司 | Low pollution reverse osmosis pure water device |
| DE102011115057A1 (en) * | 2011-10-07 | 2013-04-11 | Robert Bosch Gmbh | Water treatment plant comprises processing device used for treatment of water, which is supplied to the processing device with a pressure in a desired pressure range, and a pressure stabilizer comprising energy converter |
| CN202924841U (en) * | 2012-11-26 | 2013-05-08 | 山东山大能源环境有限公司 | Wind pressure device applicable to reverse osmosis desalination |
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| Title |
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Application publication date: 20150429 |