CN109884076A - A method of analysis reverse osmosis membrane salt rejection rate performance - Google Patents
A method of analysis reverse osmosis membrane salt rejection rate performance Download PDFInfo
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- CN109884076A CN109884076A CN201910265443.6A CN201910265443A CN109884076A CN 109884076 A CN109884076 A CN 109884076A CN 201910265443 A CN201910265443 A CN 201910265443A CN 109884076 A CN109884076 A CN 109884076A
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- osmosis membrane
- reverse osmosis
- rejection rate
- salt rejection
- diaphragm
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Abstract
The invention discloses a kind of methods for analyzing reverse osmosis membrane salt rejection rate performance, comprising the following steps: the reverse osmosis membrane component that (a) is analysed to is attached to the reverse osmosis membrane machine for test analysis；(b) water flowing is carried out to reverse osmosis membrane component to be analyzed and tests its salt rejection rate；(c) when salt rejection rate exceeds range of normal value, determine that salt rejection rate is abnormal, carry out step (d)；Otherwise, test terminates；(d) water flowing dyeing test is carried out to reverse osmosis membrane component to be analyzed using the liquid medicine that coloring agent is added again；(e) the film bag for dismantling reverse osmosis membrane component, checks diaphragm colored state；(f) it is analyzed according to diaphragm colored state and determines abnormal cause.It the composite can be widely applied to reverse osmosis membrane manufacturing field.
Description
Technical field
The present invention relates to a kind of methods for analyzing reverse osmosis membrane salt rejection rate performance.
Background technique
Reverse osmosis membrane component is common component in water purifier.In order to save space and easy to install and use, traditional is anti-
Infiltration membrane element is all using single film bag by the way of the water producing pipe spiral winding of center, to be ultimately formed to the close film bag of multilayer
Layer is constituted cylindric, and central tube is as collector pipe, the collector pipe of the multilayer pure water collection of film bag to the heart in the component.Mesh
Before, during the manufacturing of reverse-osmosis membrane element, salt rejection rate detection is that one after ro components batch production is important
Detection process.It after salt rejection rate exception is tested in water flowing, needs to dismantle reverse osmosis membrane component, carries out anomaly analysis, it is different to find out
Normal reason mostlys come from diaphragm itself or leakproofness extremely, but many abnormal, is visually difficult to observe and accurately determine,
Therefore the prior art can not quick and precisely determine that generating bad reason changes so that product is difficult to avoid that secondary injury subsequent
It is difficult to avoid that the batch problem such as film deficient purchase occur in good, be easy to cause biggish loss.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide, one kind is simple and easy to do, result is quasi-
Really, the method for analysis reverse osmosis membrane salt rejection rate performance high-efficient, at low cost.
Technical solution used by the method for analysis reverse osmosis membrane salt rejection rate performance of the invention is: the following steps are included:
(a) the reverse osmosis membrane component being analysed to is attached to the reverse osmosis membrane machine for test analysis；
(b) water flowing is carried out to reverse osmosis membrane component to be analyzed and tests its salt rejection rate；
(c) when salt rejection rate exceeds range of normal value, determine that salt rejection rate is abnormal, carry out step (d)；Otherwise, test terminates；
(d) water flowing dyeing test is carried out to reverse osmosis membrane component to be analyzed using the liquid medicine that coloring agent is added again；
(e) the film bag for dismantling reverse osmosis membrane component, checks diaphragm colored state；
(f) it is analyzed according to diaphragm colored state and determines abnormal cause.
Further, further include following steps before step (a):
(a0) negative pressure ventilation detection is carried out to reverse osmosis membrane bag, checks its vacuum degree, when vacuum degree exceeds range of normal value
When, it carries out step (a)；Otherwise, test terminates.
Further, the coloring agent is rhodamine or rhodamine B.
Further, in step (f), if uneven smooth distributed area occurs in diaphragm colored state, the area Ze Gai diaphragm is different
Often.
Further, if discrete striped occurs in diaphragm dyeing, exception scratch or impression caused by being determined as manually.
Further, if spot occurs in diaphragm dyeing, it is determined as that diaphragm supplied materials itself is abnormal.
Further, if netted striped occurs in diaphragm, it is determined as damage caused by runner cloth or filter extruding.
Further, if there is dyeing unevenly on diaphragm periphery, it is judged to sealing exception.
The beneficial effects of the present invention are: the method that the present invention uses staining analysis, to find reverse osmosis membrane component salt rejection rate
Where abnormal problem, using the normal water principle processed of reverse osmosis membrane, raw water is replaced with and the liquid medicine of coloring agent is added tests,
Reverse osmosis membrane water hole can retain 0.0001 micron of substance, and normal film coloring agent can not penetrate, only diaphragm or sealing
Property deposit when abnormal, region can penetrate coloring agent, dyed color is deeper, salt rejection rate influence it is bigger, tentatively discovery reverse osmosis
After defective products occurs in membrane element, the liquid medicine dyeing by the way that coloring agent is added realizes what analysis reverse osmosis membrane salt rejection rate generated extremely
Reason is added the liquid medicine of coloring agent by that can leave a trace when reverse-osmosis membrane element, darkens, showed not when trace is heavier
When uniform ground is distributed, the reason of causing defective products, can determine that by diaphragm colored state, such as artificial finger touches or runner
Cloth, filter extruding cause reverse osmosis membrane is damaged and supplied materials is abnormal etc., and " can develop " many meat by means of the present invention
The exception that eye can't see, exception and glue sealing sexual abnormality including desalination layer etc., therefore the present invention is a kind of simple and easy to do, result
Accurately, the method for analysis reverse osmosis membrane salt rejection rate performance high-efficient, at low cost.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for the analysis reverse osmosis membrane salt rejection rate performance of the embodiment of the present invention；
Fig. 2~Fig. 4 is several in step (f) in the method for the analysis reverse osmosis membrane salt rejection rate performance of the embodiment of the present invention
The schematic diagram of typical diaphragm colored state.
Specific embodiment
As shown in Figure 1, the present embodiment analysis reverse osmosis membrane salt rejection rate performance method the following steps are included:
(a0) negative pressure ventilation detection is carried out to reverse osmosis membrane bag, checks its vacuum degree, when vacuum degree exceeds range of normal value
When, it carries out step (a)；Otherwise, test terminates；This step is preliminary investigation, can tentatively be judged in the case where not having to whole water inspections
It is abnormal, and baking step when water examines normal is eliminated, it greatly improves the efficiency, reduces costs；
(a) the reverse osmosis membrane component being analysed to is attached to the reverse osmosis membrane machine for test analysis；
(b) water flowing is carried out to reverse osmosis membrane component to be analyzed and tests its salt rejection rate；
(c) when salt rejection rate exceeds range of normal value, determine that salt rejection rate is abnormal, carry out step (d)；Otherwise, test terminates；
(d) water flowing dyeing test is carried out to reverse osmosis membrane component to be analyzed using the liquid medicine that coloring agent is added again,
In, the coloring agent is rhodamine or rhodamine B；
(e) the film bag for dismantling reverse osmosis membrane component, checks diaphragm colored state；
(f) it is analyzed according to diaphragm colored state and determines abnormal cause, if the appearance of diaphragm colored state is uneven smooth
Distributed area, the area Ze Gai diaphragm is abnormal, and several typical case's abnormalities are as follows: as shown in Figure 1, if discrete item occurs in diaphragm dyeing
Line, then exception scratch or impression caused by being determined as manually；As shown in Fig. 2, being determined as film if spot occurs in diaphragm dyeing
Piece supplied materials itself is abnormal, and there are flaws；As shown in figure 3, being determined as that runner cloth or filter squeeze if netted striped occurs in diaphragm
It is damaged caused by pressure；If there is dyeing unevenly on diaphragm periphery, it is judged to sealing exception.
The method that the present invention uses staining analysis is utilized with finding the problem place of reverse osmosis membrane component salt rejection rate exception
Raw water is replaced with and the liquid medicine of coloring agent is added tests by the normal water principle processed of reverse osmosis membrane, and reverse osmosis membrane water hole can be cut
0.0001 micron of substance is stayed, normal film coloring agent can not penetrate, and only diaphragm or leakproofness are deposited when abnormal, location
Domain can penetrate coloring agent, and dyed color is deeper, and salt rejection rate influence is bigger, defective products occur in tentatively discovery reverse-osmosis membrane element
Afterwards, analysis reverse osmosis membrane salt rejection rate exception Producing reason is realized by the way that the liquid medicine dyeing of coloring agent is added, coloring agent is added
Liquid medicine can leave a trace when passing through reverse-osmosis membrane element, darken when trace is heavier, when showing uneven smooth distribution, lead to
Crossing diaphragm colored state can determine that the reason of causing defective products, and such as artificial finger touches or runner cloth, filter extruding cause instead
Diaphragm damage and supplied materials exception etc. are permeated, " can develop " exception being much invisible to the naked eye by means of the present invention, packet
Include exception and the glue sealing sexual abnormality etc. of desalination layer, thus the present invention be it is a kind of it is simple and easy to do, result is accurate, it is high-efficient, at
The method of this low analysis reverse osmosis membrane salt rejection rate performance.
It the composite can be widely applied to reverse osmosis membrane manufacturing field.
Claims (8)
1. a kind of method for analyzing reverse osmosis membrane salt rejection rate performance, it is characterised in that: the following steps are included:
(a) the reverse osmosis membrane component being analysed to is attached to the reverse osmosis membrane machine for test analysis；
(b) water flowing is carried out to reverse osmosis membrane component to be analyzed and tests its salt rejection rate；
(c) when salt rejection rate exceeds range of normal value, determine that salt rejection rate is abnormal, carry out step (d)；Otherwise, test terminates；
(d) water flowing dyeing test is carried out to reverse osmosis membrane component to be analyzed using the liquid medicine that coloring agent is added again；
(e) the film bag for dismantling reverse osmosis membrane component, checks diaphragm colored state；
(f) it is analyzed according to diaphragm colored state and determines abnormal cause.
2. the method for analysis reverse osmosis membrane salt rejection rate performance according to claim 1, it is characterised in that: before step (a),
Further include following steps:
(a0) negative pressure ventilation detection is carried out to reverse osmosis membrane bag, checks its vacuum degree, when vacuum degree exceeds range of normal value, into
Row step (a)；Otherwise, test terminates.
3. the method for analysis reverse osmosis membrane salt rejection rate performance according to claim 1 or 2, it is characterised in that: the dyeing
Agent is rhodamine or rhodamine B.
4. the method for analysis reverse osmosis membrane salt rejection rate performance according to claim 1 or 2, it is characterised in that: step (f)
In, if uneven smooth distributed area occurs in diaphragm colored state, the area Ze Gai diaphragm is abnormal.
5. the method for analysis reverse osmosis membrane salt rejection rate performance according to claim 4, it is characterised in that: if diaphragm dyes
There is discrete striped, then exception scratch or impression caused by being determined as manually.
6. the method for analysis reverse osmosis membrane salt rejection rate performance according to claim 4, it is characterised in that: if diaphragm dyes
There is spot, is then determined as that diaphragm supplied materials itself is abnormal.
7. the method for analysis reverse osmosis membrane salt rejection rate performance according to claim 4, it is characterised in that: if diaphragm occurs
Netted striped is then determined as damage caused by runner cloth or filter extruding.
8. the method for analysis reverse osmosis membrane salt rejection rate performance according to claim 4, it is characterised in that: if in diaphragm week
There is dyeing unevenly in side, then is judged to sealing exception.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910265443.6A CN109884076A (en) | 2019-04-03 | 2019-04-03 | A method of analysis reverse osmosis membrane salt rejection rate performance |
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| CN201910265443.6A CN109884076A (en) | 2019-04-03 | 2019-04-03 | A method of analysis reverse osmosis membrane salt rejection rate performance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115414788A (en) * | 2022-08-03 | 2022-12-02 | 佛山市麦克罗美的滤芯设备制造有限公司 | Reverse osmosis membrane detection device and reverse osmosis membrane detection method |
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| CN115414788A (en) * | 2022-08-03 | 2022-12-02 | 佛山市麦克罗美的滤芯设备制造有限公司 | Reverse osmosis membrane detection device and reverse osmosis membrane detection method |
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Application publication date: 20190614 |