CN208943850U - It is a kind of to prevent reverse osmosis dirty stifled system - Google Patents
It is a kind of to prevent reverse osmosis dirty stifled system Download PDFInfo
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- CN208943850U CN208943850U CN201821491562.0U CN201821491562U CN208943850U CN 208943850 U CN208943850 U CN 208943850U CN 201821491562 U CN201821491562 U CN 201821491562U CN 208943850 U CN208943850 U CN 208943850U
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Abstract
The utility model relates to a kind of water treatment systems, in particular to a kind of certifiable in-line coagulation bactericidal effect makes counter-infiltration system pre-treatment line maintain certain residual chlorine concentration always to prevent reverse osmosis dirty stifled system, including inclined-plate clarifying basin (1), V-type filter tank (2), filtered water reservoir (3), ultrafiltration system (4), ultrafiltration water tank (5), reverse osmosis booster pump (7) and counter-infiltration system (8), the inclined-plate clarifying basin (1), V-type filter tank (2), filtered water reservoir (3), ultrafiltration system (4), ultrafiltration water tank (5), reverse osmosis booster pump (7) and counter-infiltration system (8) are sequentially communicated, dosing mouth one (9) is equipped in the water inlet of inclined-plate clarifying basin (1), residual chlorine detecting instrument one is equipped between inclined-plate clarifying basin (1) and V-type filter tank (2), the ultrafiltration system with There are residual chlorine detecting instrument two between ultrafiltration water tank, reverse osmosis give is equipped with dosing mouth two between pump and anti-permeability pump.
Description
Technical field
The utility model relates to a kind of water treatment systems, in particular to a kind of to prevent reverse osmosis dirty stifled system.
Background technique
Current existing many power plant produce boiler feedwater using full membrane process craft, use Yangtze River Water for water source, water
Processing technological flow is surface water → advection inclined-plate clarifying basin → purification water pool → ultrafiltration → first-stage reverse osmosis → two-pass reverse osmosis
→ electrodeionization, system design is before advection inclined-plate clarifying basin plus chlorine dioxide carries out sterilization processing to raw water, but this is
That once there is a situation where one section of first-stage reverse osmosis after a period of time was frequently dirty stifled for system, was analyzed as microbial contamination, after in ultrafiltration
After water inlet increases the sterilization of secondary sodium hypochlorite, fouling membrane situation obtains certain control, after some time of use, system because
Raw water fungicide is changed to sodium hypochlorite by film problem of oxidation.From raw water fungicide be changed to sodium hypochlorite sterilization after, first-stage reverse osmosis
Film dirt blocks up situation and starts gradually to appear, and becomes the main problem for restricting the operation of equipment economic stability.
Fig. 1 is factory #32 first-stage reverse osmosis differential pressure curve figure, can be seen from the chart the factory whithin a period of time, pressure difference
There are 12 peak values, this explanation has at least carried out 12 cleanings, and actual conditions are more more serious than what curve graph was shown, most of clear
Pressure difference can not be effectively reduced by washing, and generally require repeatedly to clean, pressure difference could reduce.Even on-line cleaning without
Film is removed the special wiper mechanism of commission and cleaned to film progress single by effect.Filter core of security filter replacement is frequently, most short
The cycle of operation only has 1 week or so.Two sets of cartridge filters always replace 10 Secondary filters in 13 year one month October.The security personnel of failure
The cartridge surface of filter has apparent emplastic.It smells and has a fish like smell.It can tentatively judge membrane component and security personnel's filtering
Device is microorganism or organic pollution.
After fungicide becomes sodium hypochlorite from chlorine dioxide the stifled phenomenon of film dirt just occurs for initial thinking, it should be to kill
Bacterium effect is out of joint, uses chlorine dioxide as pretreatment fungicide, control the remaining chlorine dioxide of ultra-filtration water 0.1ppm with
Under can guarantee bactericidal effect.It is sterilized using sodium hypochlorite, generally to maintain ultra-filtration water contents of residual chlorine is 0.2ppm or more.
This increases considerably the dosage for pre-processing tank inlet time sodium.Initially from the aspect of saving medicament, by super
The secondary addition sodium hypochlorite of import is filtered, control ultra-filtration water contents of residual chlorine is 0.2ppm or more.Fig. 2 is that ultra-filtration water chlorine residue is regular
The data vouched, from vouching in terms of data, although the control of initial stage chlorine residue is not sufficiently stable, and total residual chlorine concentration average control exists
0.2ppm or more, reverse osmosis dirty stifled situation there is no be improved significantly.Increase non oxidizing bactericide aggressive dosage and
The dosing frequency, reverse osmosis dirty stifled situation are not also effectively controlled.
It is reverse osmosis to be easier that dirty block up occurs when ultra-filtration water water degradation.The change curve of feed water by reverse osmosis COD and turbidity
Such as Fig. 3, as can be seen from Figure 3 during reverse osmosis dirty stifled more serious, COD and turbidity are all without significantly deteriorating
Gesture.This illustrates that the water quality of RO pre-treatment system (ultra-filtration water) is stable.Dirt stifled index (SDI) is to measure reverse osmosis to penetrate into
The important parameter of water pollution index, the water outlet SDI of actual monitoring ultrafiltration system do not have significant change, change curve such as Fig. 4.To super
The air-leakage test for the carry out integrality that single pressure vessel of filter membrane carries out, the integrity check data of ultrafiltration are shown in Table 1, and table 1 is said
Bright part film has fracture of wire phenomenon.The value for repairing front and back water outlet SDI to film wire compares, and the SDI of a whole set of ultrafiltration system water outlet becomes
Change and little；
| Pressure vessel number | Total broken wires | O encloses situation | Connector situation | SDI measured value |
| #1 | 1 | There is deformation trace | Flawless | 4.02 |
| #3 | One | Without deformation trace | Flawless | 2.89 |
| #5 | 5 | There is deformation trace | One crackle | 2.25 |
| #8 | 1 | Without deformation trace | Flawless | 3.85 |
| #9 | 3 | Without deformation trace | Flawless | 2.95 |
The integrity check data of 1: #33 ultrafiltration of table
The EDX analysis result (see Table 2) of ultrafiltration membrane shows that the Pollution of Ultrafiltration Membrane situation of film is not serious, and film surface does not have yet
Obvious clogging.Film-strength detection is shown in Table 3, and table 3 shows that film-strength has decrease phenomenon, but still in acceptability limit, Holland side
The expert advice film in face is contemplated that be replaced in latter year.Ultrafiltration membrane carries out integral replacing.In terms of Fig. 5, Fig. 6 after replacement, reverse osmosis
Dirty stifled situation makes moderate progress thoroughly, and the cleaning frequency is extended.The filter core of security filter replacement cycle slightly extends, but effect and unknown
It is aobvious.This illustrates that the fracture of wire leakage of ultrafiltration membrane is not the main reason for reverse osmosis membrane dirt is stifled；
| Detection project | Detect film inner surface | Detect film outer surface | New film |
| C(%) | 51 | 57 | 67 |
| O(%) | 33 | 22 | 14 |
| K(%) | / | / | / |
| Al(%) | 2 | / | / |
| Si(%) | 2 | 1 | / |
| S(%) | 13 | 17 | 19 |
| CL(%) | 1 | 1 | / |
| Ca(%) | / | / | / |
| Ti(%) | / | / | / |
| Fe(%) | 2 | 3 | / |
| Mn(%) | 1 | / | / |
Table 2: the EDX of ultrafiltration membrane analyzes result
| Project | Used film | New film | Current performance (%) |
| Strainability (lmbh | 711 | 1319 | 54 |
| Tensile strength (N) | 2.3 | 3.8 | 60 |
| Break front stretching degree (%) | 31.4 | 68 | 46 |
Table 3: film-strength detection
Arrangement checks filter core of security filter and connecting component.It repeatedly examines on the filter core of security filter surface of pollution
It looks into color to be not quite similar, predominantly pale yellow, furvous, surface hand touches slightly satiny feeling, in adapter of plastic and cartridge filter
Wall has obvious satiny pollutant at about 1/3 inner surface of water inlet place, there is the taste for obviously burning hair after burning, preliminary to judge
Major pollutants are microorganism.The pollutant EDX of filter core analysis shows, pollutant carbon oxygen element ratio is listed in 2:1, and new security personnel
The carbon oxygen element of filter filtration material is 30:1 than column, this further illustrates that pollution is mainly microbial contamination.
There is a set of 400m the fourth phase in the factory3/ h water manufacturing system, water source are similarly derived from for Yangtze River Water, and water treatment technological process is
Surface water → advection inclined-plate clarifying basin → V-type filter tank → ultrafiltration → first-stage reverse osmosis → two-pass reverse osmosis → electrodeionization is
Also design plus sodium hypochlorite carry out sterilization processing to raw water to system before horizontal sedimentation tank.Three, the ultrafiltration water inlet chlorine residue of fourth phase water
Control also controlled by same value, the reverse osmosis of fourth phase water manufacturing system can guarantee that cleaning in 3 months or so is primary, ensure public security
The replacement cycle of the filter core of filter was at 90 days or so.From pretreatment in terms of comparative analysis, the two only difference is that the fourth phase set
Filter tank has been counted, and three phases did not designed filter system.This be easy to obtain filter tank guarantee it is reverse osmosis it is dirty it is stifled have it is important
The result of effect.COD can reflect content of organics in feed water by reverse osmosis to a certain extent.Fig. 7 is three, fourth phase ultrafiltration water inlet
The comparative analysis of COD, three, the ultra-filtration water COD of fourth phase water manufacturing system it is essentially identical, in technique increase filtration system there is no tables
Reveal the advantage of preferably removal organic matter.That is the reverse osmosis dirt of three phase water manufacturing systems is stifled is not without design filtering
Device system causes.
Three phase water and another difference of fourth phase water are that the sedimentation basin water outlet of three phase water is not only used to as desalination
Water water manufacturing system provides water source, also provides industrial colling for full factory, since the residence time is too long in purification water pool, chlorine residue disappears
Consumption is big, and purification water pool import must be added to the sodium hypochlorite of larger dose, and initially from economic considerations, three phase water are precipitating
A certain amount of sodium hypochlorite is added in pond water inlet, guarantees that sedimentation basin is discharged chlorine residue.When sodium hypochlorite because resting on purified water for a long time
After being exhausted in pond, in the secondary addition sodium hypochlorite of ultrafiltration water inlet, guarantee that the sodium hypochlorite of in-line coagulation pipeline contains
Amount.Fourth phase water only in tank inlet dosing, maintains pre-treatment line to guarantee the content of chlorine residue in 0.2ppm or more always.Through
It calculates, the in-line coagulation sodium hypochlorite continuous action time fourth phase is about 5 hours, and three phase water in-line coagulation time chlorine
The sour sodium continuous action time is divided into two parts, and pretreatment portion is divided into 2 hours, and ultrafiltration portion is about 2 hours, amounts to 4 hours.Three phases
The sodium hypochlorite continuous action time compared with the fourth phase, differs and little, bactericidal effect but differs greatly why, it is considered that anti-
The entire pre-treatment line of infiltration should all maintain enough concentration of sterilant, be developed drug resistance with preventing microorganism.Sodium hypochlorite
Bactericidal effect and drug concentration are related with the continuous action time of medicament, before the three secondary dosings of phase medicine system, sodium hypochlorite
Concentration has been reduced to 0ppm, again dosing, and the duration not can guarantee.Bactericidal effect necessarily declines.Later three phases water system
System changes sodium hypochlorite dosing method and guarantees the sodium hypochlorite of entire in-line coagulation pipeline only in tank inlet dosing
All in 0.3ppm or more.After dosing method changes, cartridge filter replaces filter core cycle stretch-out by 3-6 a month, and pressure difference is also sometimes
Do not increase.The reverse osmosis cleaning frequency extends to 3-6 months.From Fig. 1, it is apparent that from after in September, 2015, reverse osmosis pressure difference
Change kept stable, only carries out 2 cleanings.
In conclusion it is not difficult to find out that first-stage reverse osmosis pressure difference increases reason mainly by microbial contamination.And microorganism
The main reason for pollution is the not right of sodium hypochlorite dosing method.
Utility model content
The purpose of the utility model is to provide a kind of certifiable in-line coagulation bactericidal effects to locate counter-infiltration system in advance
Reason pipeline maintains certain residual chlorine concentration always to prevent reverse osmosis dirty stifled system.
The above-mentioned technical purpose of the utility model has the technical scheme that one kind prevents reverse osmosis dirt
Stifled system, including inclined-plate clarifying basin, V-type filter tank, filtered water reservoir, ultrafiltration system, ultrafiltration water tank, reverse osmosis booster pump and reverse osmosis
Permeable system, the inclined-plate clarifying basin, V-type filter tank, filtered water reservoir, ultrafiltration system, ultrafiltration water tank, reverse osmosis booster pump and reverse osmosis
System is sequentially communicated, and is equipped with dosing mouth one in the water inlet of inclined-plate clarifying basin, is equipped between inclined-plate clarifying basin and V-type filter tank
Residual chlorine detecting instrument one, there are residual chlorine detecting instruments two between the ultrafiltration system and ultrafiltration water tank, described reverse osmosis to pump and reverse osmosis
Dosing mouth two is equipped between pump thoroughly.
Preferably, further include reverse osmosis to pump, it is described reverse osmosis to be serially connected in ultrafiltration water tank and reverse osmosis booster pump to pump
Between.
Preferably, the dosing mouth one includes sodium hypochlorite dosing mouth and coagulant dosing mouth.
Preferably, the dosing mouth two includes reducing agent dosing mouth.
Preferably, the dosing mouth two further includes non-oxygen fungicide dosing mouth.
By using above-mentioned technical proposal, the utility model prevents reverse osmosis dirty stifled system from having the advantages that this
On the one hand the system for preventing reverse osmosis dirt stifled of utility model may be implemented Yangtze River Water or river water and directly take and pass through respectively
Precipitating, filtering, ultrafiltration and reverse osmosis rear progress directly carry out industrial water use；On the other hand traditional Yangtze River Water or river are overcome
The problem of causing silting to reverse osmosis membrane assembly after a certain period of time when water is directly filtered；Furthermore it is for entirely filtering
The pipeline of system carries out prolonged chlorine residue control and prevents the microbial reproduction in entire pipeline and be not likely to produce drug resistance
Problem, secondly, when the residual chlorine amount in pipeline is reduced to designated value or is reduced to 0, by the way that non-oxygen fungicide is added to microorganism
Kill with bacterium and antimicrobial operation, and then realizes the content of bacterium in entire pipeline and prevent the silt of reverse osmosis membrane assembly
It is stifled.
Detailed description of the invention
Fig. 1 is the #32 first-stage reverse osmosis pressure difference change curve of the prior art；
Fig. 2 is the ultra-filtration water chlorine residue change curve of the prior art；
Fig. 3 is the feed water by reverse osmosis COD of the prior art and the change curve of turbidity；
Fig. 4 is that the #33 ultrafiltration fracture of wire repairing front and back of the prior art is discharged SDI change curve；
Fig. 5 is the variation diagram of the ultrafiltration membrane replacement front and back standardization water yield of the prior art；
Fig. 6 is the variation diagram of ultrafiltration membrane replacement front and back the reverse osmosis deaslination rate and pressure difference of the prior art；
Fig. 7 is the comparative analysis of the three of the prior art, fourth phase ultrafiltration influent COD；
Fig. 8 is the system schematic for preventing reverse osmosis dirt stifled of the utility model.
In figure, 1, inclined-plate clarifying basin, 2, V-type filter tank, 3, filtered water reservoir, 4, ultrafiltration system, 5, ultrafiltration water tank, 6, reverse osmosis
To pump, 7, reverse osmosis booster pump, 8, counter-infiltration system, 9, dosing mouth one, 91, sodium hypochlorite dosing mouth, 92, coagulant dosing
Mouthful, 10, residual chlorine detecting instrument one, 11, residual chlorine detecting instrument two, 12, dosing mouth two, 121, reducing agent dosing mouth, 122, non-oxygen sterilization
Agent dosing mouth.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
It is a kind of to prevent reverse osmosis dirty stifled system, including inclined-plate clarifying basin 1, V-type filter tank 2, filtered water reservoir 3, ultrafiltration system
4, ultrafiltration water tank 5, reverse osmosis booster pump 7 and counter-infiltration system 8, the inclined-plate clarifying basin 1, filtered water reservoir 3, surpass at V-type filter tank 2
Filter system 4, ultrafiltration water tank 5, reverse osmosis booster pump 7 and counter-infiltration system 8 are sequentially communicated, in the water inlet of inclined-plate clarifying basin 1
Equipped with dosing mouth 1, be equipped with residual chlorine detecting instrument 1 between inclined-plate clarifying basin 1 and V-type filter tank 2, the ultrafiltration system 4 with it is super
There are residual chlorine detecting instrument 2 11 between water filtering tank 5, reverse osmosis give is equipped with dosing mouth 2 12 between pump 6 and anti-permeability pump 7；Also
It is described reverse osmosis 6 to be serially connected between ultrafiltration water tank 5 and reverse osmosis booster pump 7 to pump including reverse osmosis to pump 6；The dosing mouth
One 9 include sodium hypochlorite dosing mouth 91 and coagulant dosing mouth 92；The dosing mouth 2 12 includes reducing agent dosing mouth 11 and non-
Oxygen fungicide dosing mouth 12.
In the specific implementation, directly Yangtze River Water is passed through in inclined-plate clarifying basin 1 and is added in hypochlorous acid dosing mouth 91 secondary
Sodium chlorate solution carries out addition coagulant in coagulant dosing mouth 92；
It intakes pre- sedimentation, the supernatant after pre- sedimentation is passed through in V-type filter tank 2, while remaining in inclined-plate clarifying basin 1
Residual chlorine concentration in one 10 pairs of supernatants of chlorine detector detect and feed back the residual chlorine concentration, if remaining in supernatant
Cl concn is lower than 1.0ppm, then to continuing in hypochlorous acid dosing mouth 91 plus liquor natrii hypochloritis, until one 10 pairs of residual chlorine detecting instrument
Residual chlorine concentration in supernatant is maintained at 1.0ppm；V-type filter tank 2 continue to filter and be passed through in filtered water reservoir to supernatant,
Ultrafiltration system is passed through to the drainage of crossing in filtered water reservoir again, and the water in ultrafiltration system is continued to be passed through ultrafiltration water tank, chlorine residue
Water outlet chlorine residue in 2 11 pairs of ultrafiltration systems of detector detects, when the residual chlorine concentration that residual chlorine detecting instrument 2 11 detects is lower than
0.3-0.5ppm, if reducing the filtration time in V-type filter tank 2 or shortening the filtration time of filtered water reservoir, to guarantee that chlorine residue is examined
The residual chlorine concentration range that survey instrument 2 11 detects is in 0.3-0.5ppm；Ultrafiltration water is continued through to the drainage of crossing for keeping residual chlorine concentration
Case 5, reverse osmosis give pump 6 and reverse osmosis booster pump 7, carry out reducing agent dosing to the reducing agent dosing mouth 11 in dosing mouth 2 12；
Step 5: the drainage excessively after dosing is passed through reverse osmosis booster pump 7 and flowed into again instead by the reverse osmosis booster pump 7
Osmosis system flowed out drainage and concentrated water by counter-infiltration system.
If the residual chlorine concentration that the residual chlorine detecting instrument 2 11 detects is 0, to the non-oxygen fungicide in dosing mouth 2 12
Dosing mouth 12 is added non-oxygen fungicide.The non-oxygen fungicide is specially DPNPA.Add the dosing method of non-oxygen fungicide
For concentration control is within 100ppm and administration timing of drug is 1-2 hours.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (5)
1. a kind of prevent reverse osmosis dirty stifled system, including inclined-plate clarifying basin (1), V-type filter tank (2), filtered water reservoir (3), ultrafiltration
System (4), ultrafiltration water tank (5), reverse osmosis booster pump (7) and counter-infiltration system (8), the inclined-plate clarifying basin (1), V-type filter tank
(2), filtered water reservoir (3), ultrafiltration system (4), ultrafiltration water tank (5), reverse osmosis booster pump (7) and counter-infiltration system (8) successively connect
It is logical, it is characterised in that: to be equipped with dosing mouth one (9) in the water inlet of inclined-plate clarifying basin (1), filtered in inclined-plate clarifying basin (1) and V-type
Residual chlorine detecting instrument one (10) is equipped between pond (2), there are residual chlorine detecting instruments between the ultrafiltration system (4) and ultrafiltration water tank (5)
Two (11), reverse osmosis give are equipped with dosing mouth two (12) between pump (6) and reverse osmosis booster pump (7).
2. according to claim 1 prevent reverse osmosis dirty stifled system, it is characterised in that: it further include reverse osmosis to pump (6),
It is described it is reverse osmosis to pump (6) be serially connected between ultrafiltration water tank (5) and reverse osmosis booster pump (7).
3. according to claim 1 prevent reverse osmosis dirty stifled system, it is characterised in that: the dosing mouth one (9) includes
Sodium hypochlorite dosing mouth (91) and coagulant dosing mouth (92).
4. according to claim 1 prevent reverse osmosis dirty stifled system, it is characterised in that: the dosing mouth two (12) includes
Reducing agent dosing mouth (121).
5. according to claim 1 prevent reverse osmosis dirty stifled system, it is characterised in that: the dosing mouth two (12) is also wrapped
Include non-oxygen fungicide dosing mouth (122).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821491562.0U CN208943850U (en) | 2018-09-12 | 2018-09-12 | It is a kind of to prevent reverse osmosis dirty stifled system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821491562.0U CN208943850U (en) | 2018-09-12 | 2018-09-12 | It is a kind of to prevent reverse osmosis dirty stifled system |
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| Publication Number | Publication Date |
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| CN208943850U true CN208943850U (en) | 2019-06-07 |
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ID=66737853
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821491562.0U Active CN208943850U (en) | 2018-09-12 | 2018-09-12 | It is a kind of to prevent reverse osmosis dirty stifled system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110893321A (en) * | 2018-09-12 | 2020-03-20 | 无锡利信能源科技有限公司 | System and method for preventing reverse osmosis pollution blocking |
-
2018
- 2018-09-12 CN CN201821491562.0U patent/CN208943850U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110893321A (en) * | 2018-09-12 | 2020-03-20 | 无锡利信能源科技有限公司 | System and method for preventing reverse osmosis pollution blocking |
| CN110893321B (en) * | 2018-09-12 | 2023-10-17 | 无锡利信能源科技有限公司 | System and method for preventing reverse osmosis from being blocked |
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