CN102085455B - Chemical cleaning and chemical repairing method and system for waste reverse osmosis membrane - Google Patents
Chemical cleaning and chemical repairing method and system for waste reverse osmosis membrane Download PDFInfo
- Publication number
- CN102085455B CN102085455B CN 201010600223 CN201010600223A CN102085455B CN 102085455 B CN102085455 B CN 102085455B CN 201010600223 CN201010600223 CN 201010600223 CN 201010600223 A CN201010600223 A CN 201010600223A CN 102085455 B CN102085455 B CN 102085455B
- Authority
- CN
- China
- Prior art keywords
- osmosis membrane
- reverse osmosis
- water
- old
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a chemical cleaning and chemical repairing method and system for a waste reverse osmosis membrane, belonging to the field of water treatment, wherein the method and system can be used for regenerating the waste reverse osmosis membrane, reducing the water production cost and saving resources. The method disclosed by the invention comprises the following steps: producing pure water for preparing a chemical cleaning-repairing liquid, and storing the pure water in a corresponding container; carrying out back flushing on the waste membrane by utilizing a high-pressure pump, and flushing out the dirt deposited in the water inlet area of the membrane; carrying out forward pumping pm the cleaning liquid into the waste membrane, wherein one part of the cleaning liquid passes through the waste membrane and flows back to the container, and the other part of the cleaning liquid is subjected to chemical reaction with the residual dirt on the surface of the membrane; removing insoluble substances by utilizing a filter before the cleaning liquid flows back to the container; and performing circular cleaning; and if the water recovery rate of the waste membrane is excessively high and the salt removal rate is relatively low after the chemical cleaning, pumping the repairing liquid into the waste membrane again, wherein the repairing liquid passes through the waste membrane to perform circular repairing, and finally the performance parameters of the repaired waste membrane are approximate to those of a new membrane. The method and system disclosed by the invention have the characteristics that the performance parameters of the membrane cleaning process are calculated by use of the display values of a monitoring instrument of the cleaning system, and the chemical cleaning and repairing processes for the membrane are further instructed.
Description
Technical field
The present invention relates to waste and old Chemical Cleaning for Reverse Osmosis and chemical method and system of repairing, belong to water-treatment technology field.Be applicable to waste and old reverse osmosis membrane is carried out the mensuration of Chemical cleaning and chemistry reparation and reverse osmosis membrane performance.
Background technology
Reverse osmosis technology is widely used in water treatment field at present, and its operation principle is take pressure differential as power, utilizes the selection permeability of film to reach separating of solvent and solute.Because the selection permeability of film, solute is concentrated on the reverse osmosis membrane surface in the water inlet, and the formation precipitation is attached to the reverse osmosis membrane surface or is jammed in the reverse osmosis membrane fenestra, causes reverse osmosis membrane to pollute hydraulic performance decline.Because the difference of influent quality, the material that pollutes reverse osmosis membrane comprises hydrated metal oxide, carbonate, Sulfates, silicic acid class, organic matter class, microbiology class etc.; The difference of the time length that forms according to pollutant, the dirt that pollutant forms may be durable or loose, thereby can remove at film surface formation eddy current by improving flow of inlet water for loose dirt, take the method for Chemical cleaning to dissolve removal for solid dirt.
For the pollutant of heterogeneity, need to adopt the chemical cleaning solution of different formulations to clean.The alkaline cleaning fluid that contains EDTA and NaOH is more effective to the cleaning of microorganism, organic matter and silica; HCl is then to metal oxide colloids, hardness (Ca
2+And Mg
2+), the carbonate pollutant has good cleaning performance; NaHSO
3Solution has preferably effect for the microorganism that kills in the reverse osmosis membrane; Then need NaOH solution and HCl solution alternately to clean for organic matter class, silicates pollutant, then take in NaOH solution, to add the cleaning fluid of EDTA for the Sulfates pollutant.
Industrial reverse osmosis membrane mostly is 8 inches reverse-osmosis membrane elements, and this class reverse osmosis membrane aquifer yield is generally 1.5 ~ 1.8 m
3h
-1, price be 5000-8000 unit/, quality guarantee is generally 3 years.At present, the domestic industry aquifer yield surpasses 100 m
3h
-1Counter-infiltration system surpassed 200 covers.Built maximum engineering is chemical plant, Cangzhou 750 m
3h
-114000mg L
-1Inferior Seawater Desalination Project; 2002 is two covers, 2000 m of Shanghai Baoshan steel mill and Taiyuan steel mill in the maximum engineering of building
3h
-1R level steel rolling water system; The maximum project of power industry is 100 m in Yantai and Dalian
3h
-1The power plant water engineering; Barreled, bottled water counter-infiltration production line aquifer yield surpass 500 m
3d
-1Existing tens covers, that maximum is 1000 m
3d
-1Estimate near in two years will be in Shandong, the drinking water production system of ten thousand tons of daily outputs appears in Dalian.Along with the aggravation of the northern area of China climate arid and industry, civilian to the improving constantly of the water yield, water quality requirement, the embrane method desalinization must be from present peculiar to vessel, island with being main to industry, the development of municipal field, the having a high potential of market.Reverse-osmosis membrane element is widely used, but because the factor of water quality usually pollutes, causes reverse osmosis membrane desalination hydraulic performance decline, product water-based energy variation etc.; These waste and old reverse osmosis membranes if do not regenerate will improve production cost greatly; And dispose the difficult problem that waste and old reverse osmosis membrane also can become environmental protection.If can carry out cheaply to waste and old reverse osmosis membrane (reverse-osmosis membrane element price about 10%) Chemical cleaning and chemistry is repaired, old reverse osmosis membrane can be recycled, will greatly reduce industry and produce the water cost, reduce the Environmental and resource issue that brings when waste and old reverse osmosis membrane is disposed; In view of this, waste and old reverse osmosis membrane is carried out Chemical cleaning and just seem particularly important with chemistry reparation.
At present, be divided into on-line cleaning and off-line cleaning two large classes for the counter-infiltration membrane washing.On-line cleaning does not refer to reverse-osmosis membrane element is taken out, and directly imports chemical cleaning solution at water production line processed and cleans.This cleaning method is effective to polluting very light reverse-osmosis membrane element, but the membrane component that the degree of depth is polluted is invalid.Its reason is: (1). various water conservancy project processed factory is when carrying out the reverse osmosis membrane on-line cleaning, often only can take simple cleaning way and single cleaning formulation to go to tackle dissimilar pollutants or dirty class in the membrane component, chemical cleaning solution can not carry out chemical reaction with pollutant, dirty class pointedly, so cleaning performance is very poor; (2). the pipeline length of membrane module is different, resistance to water-flow is different, cause chemical cleaning solution evenly not distribute in every membrane module series connection or in parallel owing to be communicated with in the reverse osmosis membrane water manufacturing system, cause chemical cleaning solution different from the dirty class extent of reaction, make the cleaning performance of water inlet end membrane module and rear end membrane module widely different; (3). the dirty class that front end washes down during branched membrane component series connection enters the membrane component of rear end, because change in flow is detained in it it, the rear end membrane component is caused secondary pollution; (4). very low in higher in the front end membrane component, the rear end membrane component of the concentration of chemical cleaning solution during the series connection of branched membrane component, cause the cleaning performance of rear and front end membrane component widely different.In a word, the on-line cleaning of film can not make the pollutant in the reverse osmosis membrane thoroughly be cleaned, and causes the waste of Chemical cleaning reagent.
The off-line of reverse osmosis membrane cleans several different methods, and the below narrates respectively.
A kind of washing unit with reverse osmosis membrane that utility model patent (No. ZL200420033221.0) is described, its structure is comparatively simple, only can monitor the water inlet conductance of reverse osmosis membrane and produce water conductivity, and the product water-based that can not provide reverse osmosis membrane can index, can't judge cleaning performance when therefore, carrying out Chemical cleaning with this device; In addition, because this device only has a soda liquor container, carrying out acid, alkali when alternately cleaning, then need repeatedly waste discharge and repeatedly prepare different types of cleaning fluid, cause a large amount of wastes of chemical reagent; The bottom does not have drain valve in this device soda liquor container, so that the thorough discharging of cleaning fluid is also very difficult; Although the branched reverse osmosis module of this system is arranged in parallel, also can only carry out unimodule when cleaning and clean, can not the while parallel connection clean, if simultaneously cleaning in parallel, the drawback when then having above-mentioned on-line cleaning.
Subsequently, above-mentioned patent is being carried out on the improved basis, the reverse osmosis membrane assembly off-line of describing in two utility model patents (ZL200520025713.X, 200520025746.4) and online anti-cleaning device are realized the fresh water reverse cleaning of reverse osmosis membrane.But, owing in the use procedure of reverse osmosis membrane, require the back pressure of film very low (Tao Shi reverse osmosis membrane product requirement back pressure≤0.35bar), so when utilizing this system to carry out the fresh water reverse cleaning, backwashing pump institute's applied pressure and reverse osmosis membrane surface pressing are poor will to keep very little, cause operation easier to increase, and the operation of this fresh water reverse cleaning is abnormally dangerous, be easy to the functional membrane of reverse-osmosis membrane element is punctured, cause membrane component to be scrapped.In addition, this device is to clean simultaneously branched reverse-osmosis membrane element, and with the on-line cleaning similar process of film, cleaning performance is very poor.
A kind of multifunctional off-line cleaning device for reverse osmosis membrane (200510016025.1) that Tianjin Chemical Research ﹠ Desing Inst proposes also can carry out the fresh water reverse cleaning to reverse osmosis membrane, and some performance datas of reverse osmosis membrane also can be provided; But because the reverse osmosis membrane of this device parallel connection is too much, cause the reverse osmosis membrane of severe contamination can not obtain thoroughly Chemical cleaning; And its conductivity meter is installed in total pure water end and total dense water end (W.E.), and the desalination performance, the product water-based that cause obtaining can all be the data of whole system, rather than the data of single reverse osmosis membrane, and the result can't judge the quality that every reverse osmosis membrane cleans; The cleaning fluid fresh water that this system produces can not be back to soda liquor container, causes concentration of lotion increase infringement reverse osmosis membrane, pollutant levels to increase and pollutes reverse osmosis membrane again; Do not filter during the cleaning fluid concentrate recirculation, the particulate matter that causes washing down enters reverse osmosis membrane again, causes the damage of reverse osmosis membrane.
In the offline model washing unit with reverse osmosis membrane of in utility model patent (ZL200620108379.9), describing, for improving rinse liquid temperature, to soda liquor container a heater has been installed, but that the problem of bringing simultaneously is heating power is large, power consumption, the electric leakage in the operation is dangerous to increase; In the cleaning operation process of reality, because the effect of pump, the temperature of cleaning fluid can constantly raise, and does not need extra heater.It is the preparation and discharging difficulty of cleaning fluid that also there is following shortcoming in this device, can't realize the back flush procedure that flushing water flows out from dense water side inflow, influent side; A soda liquor container can not be realized alternately cleaning fast of variety classes cleaning fluid, the waste chemical reagent; This device does not arrange relevant chemical instruments, can not provide every reverse osmosis membrane after the Chemical cleaning the desalination performance, produce water-based energy and two ends pressure reduction; This device can not clean single reverse osmosis membrane, can't judge single membrane washing effect.
Also having a kind of membrane washing method (ZL200710036315.1) is that the coiled reverse osmosis membrane after polluting is disintegrated, and every page of film is cleaned respectively, utilizes afterwards industrial process with the film backrush of disintegrating, again fw frp shell.Although the method can thoroughly be cleaned film surface dirt, owing to take film body apart reduced film compressive property, thereby cause dirt difficult cleaning the in the fenestra, and the method complex process, complex operation, cost are higher, are unfavorable for promoting.
Existing reverse osmosis membrane membrane off-line cleaning system Main Problems is: can not carry out specific performance measurement, specific Chemical cleaning, specific chemistry reparation for various specific reverse osmosis membranes, cause the off-line Chemical cleaning of reverse osmosis membrane to have blindness, the Chemical cleaning effect is undesirable; And the operation of fresh water reverse cleaning is easy to reverse osmosis membrane is punctured, and causes film to be scrapped; Complete reverse osmosis membrane membrane off-line cleaning system and device at first will have the function of every reverse osmosis membrane performance parameter of timely on-line monitoring, and then set cleaning program, cleaning step and operating process according to the film properties parameter that obtains, judge cleaning performance according to the changing value of every reverse osmosis membrane performance parameter at last.
Summary of the invention
The objective of the invention is in order to solve the problem of prior art existence, develop a kind of method and system that waste and old Chemical Cleaning for Reverse Osmosis and chemistry are repaired that are specifically designed to, solve the problem that existing off-line cleaning device for reverse osmosis membrane runs into when Chemical cleaning: can not monitor single film properties, clean not thoroughly, chemical reagent waste, fresh water reverse cleaning cause reverse osmosis membrane puncture etc.Utilize our invention, can make the off-line cleaning operation of reverse osmosis membrane become simple, and economy, reduction environmental pollution, the real-time performance measurement to reverse osmosis membrane that can save chemical reagent, improve Chemical cleaning, judge whether waste and old counter-infiltration membrane washing is thorough.
Technical scheme of the present invention is comprised of with chemical repair method and system Chemical cleaning.
Chemical cleaning of the present invention and chemical repair system device are linked to each other with charcoal filter, the first candle filter, tap water containers successively by the running water water intaking valve, consist of the running water pretreatment system; Charcoal filter blow-off pipe and charcoal filter backwash valve are installed on the charcoal filter; The filter atmospheric valve is installed on the first candle filter; Reparation liquid outlet valve on running water outlet valve on the tap water containers, the acidic cleaning solution outlet valve on the acidic cleaning solution container, the alkaline cleaning fluid outlet valve on the alkaline cleaning fluid container, the reparation liquid container interconnects by a common line, access afterwards pH meter, water inlet conductivity meter, link to each other with the high-pressure pump entrance again; Running water drain valve, acidic cleaning solution drain valve, alkaline cleaning fluid drain valve, reparation liquid drain valve are interconnected by blow-off pipe; Running water concentrate recirculation valve, acidic cleaning solution concentrate recirculation valve, alkaline cleaning fluid concentrate recirculation valve, reparation liquid concentrate recirculation valve are interconnected by a common line and the outlet of the second candle filter; Running water fresh water return valve, acidic cleaning solution fresh water return valve, alkaline cleaning fluid fresh water return valve, reparation liquid fresh water return valve are by a common line, be interconnected with new reverse osmosis membrane fresh water valve, new reverse osmosis membrane fresh-water flow meter, new reverse osmosis membrane fresh water conductivity meter, new reverse osmosis membrane fresh water sample valve, new reverse osmosis membrane fresh water return duct, old reverse osmosis membrane fresh-water flow meter, old reverse osmosis membrane fresh water conductivity meter, old reverse osmosis membrane fresh water sample valve, old reverse osmosis membrane fresh water valve, old reverse osmosis membrane fresh water return duct, the bypass of pipeline is equipped with the fresh water drain valve; Pressure-reducing valve is in parallel with high-pressure pump, and total water intaking valve is arranged on the export pipeline, and is interconnected with old reverse osmosis membrane inlet gage, old reverse osmosis membrane backwash non-return valve, old reverse osmosis membrane flow of inlet water meter, old reverse osmosis membrane water inlet pipe, old reverse osmosis membrane water intaking valve; The old reverse osmosis membrane concentrate recirculation pipe of old reverse osmosis membrane outlet and old reverse osmosis membrane backwash water intaking valve, the dense water pressure table of old reverse osmosis membrane, the dense water sampling valve of old reverse osmosis membrane, the dense water valve of old reverse osmosis membrane, new reverse osmosis membrane flow of inlet water meter, new reverse osmosis membrane inlet gage, new reverse osmosis membrane water inlet conductivity meter, new reverse osmosis membrane bypass valve, new reverse osmosis membrane concentrate recirculation pipe are interconnected; Concentrated water discharge valve, the second candle filter water intaking valve, the second candle filter are interconnected; On another water outlet pipeline of old reverse osmosis membrane the high purity water gate valve is installed and imports new reverse osmosis membrane water inlet pipe, be connected with new reverse osmosis membrane again; Old reverse osmosis membrane water inlet pipe also is interconnected with new reverse osmosis membrane backwash non-return valve, new reverse osmosis membrane concentrate recirculation pipe, new reverse osmosis membrane backwash water intaking valve, the new dense water pressure table of reverse osmosis membrane, the new dense water valve of reverse osmosis membrane, the new dense water sampling valve of reverse osmosis membrane, the new dense water non-return valve of reverse osmosis membrane; Link to each other by old reverse osmosis membrane bypass valve between old reverse osmosis membrane water inlet pipe and the old reverse osmosis membrane concentrate recirculation pipe; Link to each other by new reverse osmosis membrane water intaking valve between the old reverse osmosis membrane concentrate recirculation Guan Yuxin reverse osmosis membrane water inlet pipe; The second candle filter Pressure gauge and pollution index meter (SDI) sample valve are installed on the second candle filter; The second candle filter bypass valve is in parallel with the second candle filter and the second candle filter water intaking valve by pipeline; Tap water containers, acidic cleaning solution container, alkaline cleaning fluid container and reparation liquid container are stored respectively pretreated running water, acidic cleaning solution, alkaline cleaning fluid and reparation liquid and are positioned on the receptacle stand.
Chemical cleaning of the present invention and chemical repair method scheme: the first step prepares fresh water and is used for disposing various solution, and the measured performance parameter that carries out simultaneously new reverse osmosis membrane is used for the comparison with old reverse osmosis membrane; Concrete grammar is, under the pressure of running water, running water is through charcoal filter, the first candle filter enters tap water containers, under the effect of high-pressure pump, the running water of the tap water containers new reverse osmosis membrane water inlet pipe of flowing through enters new reverse osmosis membrane, the fresh water that produces flows into respectively the acidic cleaning solution container through new reverse osmosis membrane fresh water return duct, alkaline cleaning fluid container and reparation liquid container, this fresh water is used for preparing various relevant chemical solutions, the dense water that new reverse osmosis membrane produces is through new reverse osmosis membrane concentrate recirculation pipe, the second candle filter returns tap water containers, and water processed circulates; Second step uses the running water of water stabilization as the initial performance parameter of the old reverse osmosis membrane of sample determination, then old reverse osmosis membrane is carried out in advance backwash of running water; Concrete grammar is, under the pressure of running water, running water enters tap water containers through charcoal filter, the first candle filter, then, running water is under the effect of high-pressure pump, the old reverse osmosis membrane concentrate recirculation pipe of flowing through enters old reverse osmosis membrane, and the dirt on reverse osmosis membrane surface is carried out back flush, again from the concentrated water discharge valve discharging of old reverse osmosis membrane water inlet pipe; The 3rd step, acidic cleaning solution flows out from the acidic cleaning solution container under the effect of high-pressure pump, enter old reverse osmosis membrane through old reverse osmosis membrane water inlet pipe, the fresh water that produces returns the acidic cleaning solution container through old reverse osmosis membrane fresh water return duct, the dense water that produces returns the acidic cleaning solution container through old reverse osmosis membrane concentrate recirculation pipe, the second candle filter, and acidic cleaning solution is recycled; The 4th step, alkaline cleaning fluid flows out from the alkaline cleaning fluid container under the effect of high-pressure pump, enter old reverse osmosis membrane through old reverse osmosis membrane water inlet pipe, the fresh water that produces returns the alkaline cleaning fluid container through old reverse osmosis membrane fresh water return duct, the dense water that produces returns the alkaline cleaning fluid container through old reverse osmosis membrane concentrate recirculation pipe, the second candle filter, and alkaline cleaning fluid is recycled; The 5th step, repairing liquid flows out from repairing liquid container under the effect of high-pressure pump, enter old reverse osmosis membrane through old reverse osmosis membrane water inlet pipe, the fresh water that produces returns the reparation liquid container through old reverse osmosis membrane fresh water return duct, the dense water that produces returns the reparation liquid container through old reverse osmosis membrane concentrate recirculation pipe, the second candle filter, and reparation liquid is recycled.
Reverse osmosis membrane performance parametric measurement process of the present invention: running water enters tap water containers through charcoal filter, the first candle filter, under the effect of high-pressure pump, the running water of water stabilization is as specimen, from tap water containers, flow out, enter old reverse osmosis membrane through old reverse osmosis membrane water inlet pipe, the fresh water that produces returns tap water containers through old reverse osmosis membrane fresh water return duct, and the dense water of generation returns tap water containers through old reverse osmosis membrane concentrate recirculation pipe, the second candle filter; Simultaneously, the dense water pressure table of intake pressure value, old reverse osmosis membrane in the time of can obtaining running water by old reverse osmosis membrane by the old reverse osmosis membrane inlet gage in the system can obtain the dense water lateral pressure of old reverse osmosis membrane value, thereby obtains old reverse osmosis membrane two ends pressure reduction.The size of reverse osmosis membrane two ends pressure difference has reflected the degree of reverse osmosis membrane pollution, fouling and obstruction, and the larger reverse osmosis membrane of pressure difference is contaminated more serious; Its calculating formula is seen formula 1:
ΔP＝P
1-P
2 (1)
In the formula 1, Δ P is pressure differential (MPa), P
1Be old reverse osmosis membrane intake pressure (MPa), P
2Be the dense water lateral pressure of old reverse osmosis membrane (MPa); By the water inlet conductivity value of water inlet conductivity meter when obtaining running water by old reverse osmosis membrane, obtain its fresh water conductivity value by the fresh water conductivity meter, can obtain as calculated the desalination rate of old reverse osmosis membrane; The desalination rate has reflected the desalination performance of reverse osmosis membrane; The desalination rate is high, illustrates that the purity of reverse osmosis produced water is high, contained soluble salts is few; Its calculating formula is seen formula 2:
y＝(E
1-E
2)/E
1×100％ (2)
In the formula, y is the desalination rate, E
1Be water inlet electrical conductivity (μ s/cm), E
2Be fresh water electrical conductivity (μ s/cm); Flow of inlet water when obtaining running water by old reverse osmosis membrane by old reverse osmosis membrane flow of inlet water meter, obtain its fresh-water flow by the fresh-water flow meter, can obtain as calculated the water rate of recovery and the water yield per day of old reverse osmosis membrane; The water rate of recovery and water yield per day have all reflected the water-yielding capacity of reverse osmosis membrane, and the aquifer yield that the water rate of recovery is crossed low then reverse osmosis membrane is just little, otherwise the desalination rate of film reduces, produces the water deteriorating water quality; The calculating formula of the water rate of recovery and water yield per day is suc as formula shown in 3,4:
z＝V
2/V
1×100％ (3)
Q＝24×V
2 (4)
In the formula 3, V
2Be fresh-water flow (m
3/ h), V
1Be flow of inlet water (m
3/ h); In the formula 4, Q is water yield per day (m
3/ d), V
2Be fresh-water flow (m
3/ h).The performance parameters such as pressure reduction, desalination rate, the water rate of recovery and water yield per day of the present invention by the on-line monitoring reverse osmosis membrane be the performance of overall merit reverse osmosis membrane in time, and can instruct according to these parameters Chemical cleaning and the repair process of reverse osmosis membrane, when the performance parameter of old reverse osmosis membrane during near new film, Chemical cleaning with repair and can finish.
Advantage of the present invention is as follows:
1. the present invention has designed the backwash stream of reverse osmosis membrane in system, before carrying out Chemical cleaning, first with large flow, wash in advance through the running water of the first candle filter loose dirt to the reverse osmosis membrane surface, can recover to a certain extent the desalination performance of reverse osmosis membrane, the secondary pollution that pollutant enters in the middle part of the lighter reverse-osmosis membrane element of pollution and tail region causes of film water inlet region clustering be can reduce, the difficulty that reduces the film surface clean, the purpose of saving scavenging period, saving cleaning reagent reached;
2. the present invention gathers membrane surface flushing insoluble matter out by the pollution index meter on the SDI sample valve, can prejudge the composition of insoluble matter or dirt, and then determines to take different cleaning steps; Can realize like this simplifying the operation, using targetedly the purpose of chemical cleaning solution;
3. the present invention has designed several special-purpose Chemical cleaning liquid containers and has repaired liquid container in system, make the chemical cleaning solution of first use or repair liquid and preserve, be used for cleaning next time, the consumption that can greatly save chemical reagent alleviates the carrying capacity of environment of chemical waste discharge;
4. the present invention has designed the closed circuit of cleaning fluid and reparation liquid in system, and the filtration by the second candle filter, saved on the one hand chemical reagent, can the insoluble matter that clean out in time be filtered on the other hand, prevent that these insoluble matters from entering reverse osmosis membrane again, make secondary pollution and film surface abrasion and the destruction of pair of films;
5. the present invention has complete performance monitoring system, the on-line determination instrument that every reverse osmosis membrane assembly is had independent intake pressure, dense water pressure, water inlet electrical conductivity, fresh water electrical conductivity, flow of inlet water, fresh-water flow, so not only can in time monitor performance and the state of reverse osmosis membrane, in time adjust cleaning fluid prescription and cleaning process, and can reduce because the DATA REASONING error (pressure drop that for example, is caused by system pipeline) that system pipeline itself causes;
6. the present invention can utilize the needed pure water of equipment of itself production preparation cleaning fluid;
7. the present invention can also provide condition of high voltage, and reverse osmosis membrane performance is done complete mensuration.
The present invention is applicable to the reverse-osmosis membrane element of different brands different model is carried out Chemical cleaning, reparation and performance measurement; Also reverse osmosis membrane assembly can be replaced with the hyperfiltration membrane assembly of vertical placement, become the chemical cleaning system of a ultrafiltration membrane elements, be used for off-line pickling and the alkali cleaning of milipore filter.Scientific domain involved in the present invention has the multiple subjects such as membrane technology, water treatment technology, Chemical cleaning, chemistry reparation, chemical instruments, is the comprehensive study achievement of cross discipline, has very important use meaning and social value.
Description of drawings
The waste and old Chemical Cleaning for Reverse Osmosis of Fig. 1 and chemical repair system schematic diagram.
(1) running water water intaking valve among the figure, (2) charcoal filter, (3) charcoal filter backwash valve, (4b) the first candle filter, (5) filter atmospheric valve, (6a) tap water containers, (7a) acidic cleaning solution container, (8a) alkaline cleaning fluid container, (9a) repair liquid container, (10) running water concentrate recirculation valve, (11) running water fresh water return valve, (12) running water outlet valve, (13) acidic cleaning solution concentrate recirculation valve, (14) acidic cleaning solution fresh water return valve, (15) acidic cleaning solution outlet valve, (16) alkaline cleaning fluid fresh water return valve, (17) alkaline cleaning fluid concentrate recirculation valve, (18) alkaline cleaning fluid outlet valve, (19) repair liquid fresh water return valve, (20) repair liquid concentrate recirculation valve, (21) repair the liquid outlet valve, (22) pH meter, (23) water inlet conductivity meter, (24) high-pressure pump, (25) pressure-reducing valve, (26) total water intaking valve, (27) old reverse osmosis membrane inlet gage, (28) old reverse osmosis membrane backwash non-return valve, (29). old reverse osmosis membrane flow of inlet water meter, (30) old reverse osmosis membrane water intaking valve, (31) old reverse osmosis membrane, (32) old reverse osmosis membrane bypass valve, (33) old reverse osmosis membrane backwash water intaking valve, (34) the dense water pressure table of old reverse osmosis membrane, (35) old reverse osmosis membrane fresh water valve, (36) old reverse osmosis membrane fresh water conductivity meter, (37) old reverse osmosis membrane fresh-water flow meter, (38) new reverse osmosis membrane backwash non-return valve, the dense water sampling valve of (39) old reverse osmosis membrane, (40) old reverse osmosis membrane fresh water sample valve, (41) the dense water valve of old reverse osmosis membrane, (42) high purity water gate valve, (43) new reverse osmosis membrane flow of inlet water meter, (44) new reverse osmosis membrane inlet gage, (45) new reverse osmosis membrane water inlet conductivity meter, (46) new reverse osmosis membrane water intaking valve, (47) new reverse osmosis membrane, (48) new reverse osmosis membrane backwash water intaking valve, (49) the new dense water pressure table of reverse osmosis membrane, (50) the new dense water valve of reverse osmosis membrane, (51) new reverse osmosis membrane fresh water conductivity meter, (52) new reverse osmosis membrane fresh-water flow meter, (53) new reverse osmosis membrane fresh water valve, (54) new reverse osmosis membrane bypass valve, (55) new dense water non-return valve of reverse osmosis membrane, (56) new dense water sampling valve of reverse osmosis membrane, (57) new reverse osmosis membrane fresh water sample valve, (58) second candle filter water intaking valves, (59) second candle filter bypass valves, (60b) the second candle filter, (61) second candle filter Pressure gauges, (62) second candle filter pollution index meter (SDI) sample valves, (63) concentrated water discharge valve, (64) fresh water drain valve, (65) running water drain valve, (66) acidic cleaning solution drain valve, (67) alkaline cleaning fluid drain valve, (68) repair the liquid drain valve, (69) old reverse osmosis membrane water inlet pipe, (70) old reverse osmosis membrane concentrate recirculation pipe, (71) old reverse osmosis membrane fresh water return duct, (72) new reverse osmosis membrane water inlet pipe, (73) new reverse osmosis membrane concentrate recirculation pipe, (74) new reverse osmosis membrane fresh water return duct, (75) blow-off pipe, (76) charcoal filter blow-off pipe (77) receptacle stand.
The new reverse osmosis membrane desalination of Fig. 2 embodiment 1BW30-400 type rate is with pressure history figure.
The new counter-infiltration film water of Fig. 3 embodiment 1BW30-400 type rate of recovery is with pressure history figure.
Desalination rate and the water rate of recovery change curve of the old reverse osmosis membrane of Fig. 4 embodiment 2BW30-400 type after the different chemical cleaning step.
The specific embodiment
By reference to the accompanying drawings embodiments of the invention are further described:
Utilize method of the present invention and device (seeing Fig. 1) that the performance of the new reverse osmosis membrane of BW30-400 is measured.Experimentation is, utilize process charcoal filter (2) and the pretreated running water of the first candle filter (4b) (6) as test solution, investigated the variation tendency of water inlet electrical conductivity, fresh water electrical conductivity, flow of inlet water and the fresh-water flow of new reverse osmosis membrane under different intake pressures, the related data that obtains sees Table 1.According to these data, calculate desalination rate and the water Recovery curve (0.13～1.48MPa) of the new reverse osmosis membrane shown in Fig. 2,3.
Embodiment 2
Present embodiment is the overall process of the waste and old reverse osmosis membrane of BW30-400 type being carried out Chemical cleaning.After carrying out different cleaning steps, use respectively process charcoal filter (2) and the pretreated running water of the first candle filter (4b) (6) as test solution, be respectively 1.20 at intake pressure, measured respectively water inlet electrical conductivity, fresh water electrical conductivity, flow of inlet water, fresh-water flow, intake pressure and the dense water pressure of reverse osmosis membrane under the 1.50MPa, obtained experimental data in the table 2,3 and the various change curves of Fig. 4.According to these data, calculate the Specifeca tion speeification after the waste and old reverse osmosis membrane different chemical cleaning step shown in the table 4.
Embodiment 3
Utilize method of the present invention and device that the old reverse osmosis membrane of CPA3-8040 High Pressure Difference has been carried out Chemical cleaning, the results are shown in Table 5.The feature of this film is that initial pressure reduction is too large, is 1.25MPa, and film is blocked, can't measure its initial desalination performance.Through back flush, the stream of film is opened.Subsequently, use acidic cleaning solution that it is cleaned, its pressure reduction drops to 0.17MPa gradually, but its desalination rate and the water rate of recovery are still lower, are respectively 71.9% and 11.4%, so use again alkaline cleaning fluid that it is cleaned.Alkali cleaning is mainly for the organic matter of removing the film surface, colloid, and SiO
2Deng.The desalination rate drops to 69.9% after the alkali cleaning, and the water rate of recovery rises to 19.2%, and pressure reduction drops to 0.15MPa.After, alkaline cleaning fluid alkaline through repeatedly using cleans, use at last chemical renovation agent that it is carried out chemistry reparation, make its desalination rate rise to 87%, the water rate of recovery is 14%, and pressure reduction is 0.15MPa, and this old reverse osmosis membrane has approached the performance of new film substantially.
Table 6 is the Chemical cleaning situation of the old reverse osmosis membrane of BW30-400 type High Pressure Difference.Can find out that desalination rate (96.6%) and the water rate of recovery (17.6%) that this film is initial are all better, but pressure reduction (0.20MPa) bigger than normal.Utilize the present invention to carry out after Chemical cleaning and the chemical repair process, the desalination rate of old film and the water rate of recovery be improved significantly, mould is poor to drop to 0.12MPa from 0.20MPa, pressure reduction has descended 40%, its performance has also approached the performance of new film substantially.
Utilize method of the present invention and device that the low old reverse osmosis membrane of water rate of recovery BW30-400 type is carried out Chemical cleaning, the results are shown in Table 7.As can be seen from the table, the desalination rate (94.6%) that this film is initial and mould poor (0.13MPa) are all better, but its water rate of recovery (12.6%) and aquifer yield (30.2m on the low side
3d
-1).Carry out after the multistep Chemical cleaning with the present invention, the desalination rate of old film rises to 98%, and the water rate of recovery rises to 17.8% from 12.6%, and aquifer yield is also from 30.2m
3d
-1Rise to 43.2m
3d
-1, pressure reduction also descends to some extent, and its performance has also approached the performance of new film substantially.
Table 8 is the low old membrane washing result of water rate of recovery BW30-365 type.The initial desalination rate of old film is 95.1%, and pressure reduction is 0.11MPa, and the water rate of recovery is 7.9%, and permeable amount is 18.9m
3d
-1Clearly, the water rate of recovery of old film and permeable amount are too low.Carry out finally making the water rate of recovery of old film rise to 12.6% after the multistep Chemical cleaning with the present invention, risen 4.7%, permeable amount has risen 60%, and its key property is near the performance of new film.
Embodiment 5
Utilize method of the present invention and device that the low old reverse osmosis membrane of desalination rate CPA2-8040 type is carried out Chemical cleaning, the results are shown in Table 9.Can find out that the initial desalination rate of this film only is 39.3%, the water rate of recovery is 15.9%, and pressure reduction is 0.15MPa, and its desalination rate is very poor.Carry out after the multistep Chemical cleaning with the present invention, the desalination rate of this film rises to 93.5%, and its key property is near the performance of new film.
Table 10 is cleaning process and the result of the low old reverse osmosis membrane of desalination rate CPA3-8040 type.As can be seen from the table, the initial desalination rate of film only is 63.8%, and its desalination rate is on the low side.Carry out after the multistep Chemical cleaning with the present invention, the desalination rate of this film is increased to 92.5%, has risen 28.7%, and the water rate of recovery, pressure reduction all return to normal range (NR) substantially, and its key property is near the performance of new film.
Claims (10)
1. a waste and old reverse-osmosis membrane element Chemical cleaning and the chemistry system of repairing, it is characterized in that: running water water intaking valve (1) links to each other successively with charcoal filter (2), the first candle filter (4b), tap water containers (6a), consists of the running water pretreatment system; Charcoal filter blow-off pipe (76) and charcoal filter backwash valve (3) are installed on the charcoal filter (2); Filter atmospheric valve (5) is installed on the first candle filter (4b); Reparation liquid outlet valve (21) on running water outlet valve (12) on the tap water containers (6a), the acidic cleaning solution outlet valve (15) on the acidic cleaning solution container (7a), the alkaline cleaning fluid outlet valve (18) on the alkaline cleaning fluid container (8a), the reparation liquid container (9a) interconnects by a common line, access afterwards pH meter (22), water inlet conductivity meter (23), link to each other with high-pressure pump (24) entrance again; Running water drain valve (65), acidic cleaning solution drain valve (66), alkaline cleaning fluid drain valve (67), reparation liquid drain valve (68) are interconnected by blow-off pipe (75); Running water concentrate recirculation valve (10), acidic cleaning solution concentrate recirculation valve (13), alkaline cleaning fluid concentrate recirculation valve (17), reparation liquid concentrate recirculation valve (20) are interconnected by a common line and the second candle filter (60b) outlet; Running water fresh water return valve (11), acidic cleaning solution fresh water return valve (14), alkaline cleaning fluid fresh water return valve (16), repair liquid fresh water return valve (19) by a common line, with new reverse osmosis membrane fresh water valve (53), new reverse osmosis membrane fresh-water flow meter (52), new reverse osmosis membrane fresh water conductivity meter (51), new reverse osmosis membrane fresh water sample valve (57), new reverse osmosis membrane fresh water return duct (74), old reverse osmosis membrane fresh-water flow meter (37), old reverse osmosis membrane fresh water conductivity meter (36), old reverse osmosis membrane fresh water sample valve (40), old reverse osmosis membrane fresh water valve (35), old reverse osmosis membrane fresh water return duct (71) is interconnected, and the bypass of pipeline is equipped with fresh water drain valve (64); Pressure-reducing valve (25) is in parallel with high-pressure pump (24), and total water intaking valve (26) is arranged on the export pipeline, and be interconnected with old reverse osmosis membrane inlet gage (27), old reverse osmosis membrane backwash non-return valve (28), old reverse osmosis membrane flow of inlet water meter (29), old reverse osmosis membrane water inlet pipe (69), old reverse osmosis membrane water intaking valve (30); The old reverse osmosis membrane concentrate recirculation pipe (70) and old reverse osmosis membrane backwash water intaking valve (33) of old reverse osmosis membrane (31) outlet, the dense water pressure table of old reverse osmosis membrane (34), the dense water sampling valve of old reverse osmosis membrane (39), the dense water valve of old reverse osmosis membrane (41), new reverse osmosis membrane flow of inlet water meter (43), new reverse osmosis membrane inlet gage (44), new reverse osmosis membrane water inlet conductivity meter (45), new reverse osmosis membrane bypass valve (54), new reverse osmosis membrane concentrate recirculation pipe (73) is interconnected; Concentrated water discharge valve (63), the second candle filter water intaking valve (58), the second candle filter (60b) are interconnected; High purity water gate valve (42) is installed on another water outlet pipeline of old reverse osmosis membrane (31) and imports new reverse osmosis membrane water inlet pipe (72), be connected with new reverse osmosis membrane (47) again; Old reverse osmosis membrane water inlet pipe (69) also is interconnected with new reverse osmosis membrane backwash non-return valve (38), new reverse osmosis membrane concentrate recirculation pipe (73), new reverse osmosis membrane backwash water intaking valve (48), the new dense water pressure table of reverse osmosis membrane (49), the new dense water valve of reverse osmosis membrane (50), the new dense water sampling valve of reverse osmosis membrane (56), the new dense water non-return valve of reverse osmosis membrane (55); Link to each other by old reverse osmosis membrane bypass valve (32) between old reverse osmosis membrane water inlet pipe (69) and the old reverse osmosis membrane concentrate recirculation pipe (70); Link to each other by new reverse osmosis membrane water intaking valve (46) between old reverse osmosis membrane concentrate recirculation pipe (70) and the new reverse osmosis membrane water inlet pipe (72); The second candle filter Pressure gauge (61) and pollution index meter (SDI) sample valve (62) are installed on the second candle filter (60b); The second candle filter bypass valve (59) is in parallel with the second candle filter (60b) and the second candle filter water intaking valve (58) by pipeline; Tap water containers (6a), acidic cleaning solution container (7a), alkaline cleaning fluid container (8a) and reparation liquid container (9a) are stored respectively pretreated running water (6), acidic cleaning solution (7), alkaline cleaning fluid (8) and reparation liquid (9) and are positioned on the receptacle stand (77).
2. waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 1 and chemical system of repairing is characterized in that: regulate pressure in 0.5～4.1MPa scope, obtain the continuous delta data of relevant reverse osmosis membrane performance under the different pressures.
3. waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 1 and chemical system of repairing is characterized in that: realize the in parallel of a plurality of reverse osmosis membrane assemblies or series connection use in system; Or reverse osmosis membrane assembly is replaced with hyperfiltration membrane assembly, and become the chemical cleaning system of a ultrafiltration membrane elements, be used for off-line pickling and the alkali cleaning of milipore filter.
4. waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 1 and the chemistry system of repairing, it is characterized in that: all valves in the system are follow procedure manual operation or automatic operation all; The automatic operation process is controlled by computer or program controller.
5. one kind is used the system as claimed in claim 1 to carry out waste and old reverse-osmosis membrane element Chemical cleaning and chemical method of repairing, it is characterized in that: the first step, open running water water intaking valve (1), running water (W) is through charcoal filter (2), the first candle filter (4b) enters tap water containers (6a), under the effect of high-pressure pump (24), the running water (6) of tap water containers (6a) the new reverse osmosis membrane water inlet pipe (72) of flowing through enters new reverse osmosis membrane (47), the fresh water that produces returns respectively acidic cleaning solution container (7a) through new reverse osmosis membrane fresh water return duct (74), alkaline cleaning fluid container (8a) and reparation liquid container (9a), this fresh water is used for preparing various relevant chemical solutions, the dense water that new reverse osmosis membrane (47) produces is through new reverse osmosis membrane concentrate recirculation pipe (73), the second candle filter (60b) returns tap water containers (6a), and water processed circulates; Second step, running water (6) in the tap water containers (6a) is under the effect of high-pressure pump (24), enter old reverse osmosis membrane (31) from old reverse osmosis membrane concentrate recirculation pipe (70), it is carried out back flush, discharge from concentrated water discharge valve (63) through old reverse osmosis membrane water inlet pipe (69) again; The 3rd step, acidic cleaning solution (7) is under the effect of high-pressure pump (24), flow out from acidic cleaning solution container (7a), enter old reverse osmosis membrane (31) through old reverse osmosis membrane water inlet pipe (69) chemical reaction occurs, the fresh water that produces returns acidic cleaning solution container (7a) through old reverse osmosis membrane fresh water return duct (71), the dense water that produces is through old reverse osmosis membrane concentrate recirculation pipe (70), filter out wherein insoluble matter by the second candle filter (60b), then return acidic cleaning solution container (7a), acidic cleaning solution is recycled; The 4th step, alkaline cleaning fluid (8) is under the effect of high-pressure pump (24), flow out from alkaline cleaning fluid container (8a), enter old reverse osmosis membrane (31) through old reverse osmosis membrane water inlet pipe (69) chemical reaction occurs, the fresh water that produces returns alkaline cleaning fluid container (8a) through old reverse osmosis membrane fresh water return duct (71), the dense water that produces is through old reverse osmosis membrane concentrate recirculation pipe (70), filter out wherein insoluble matter by the second candle filter (60b), then return alkaline cleaning fluid container (8a), alkaline cleaning fluid is recycled; The 5th step, repair liquid (9) under the effect of high-pressure pump (24), flow out from repairing liquid container (9a), enter old reverse osmosis membrane (31) through old reverse osmosis membrane water inlet pipe (69) chemical reaction occurs, the fresh water that produces returns through old reverse osmosis membrane fresh water return duct (71) and repairs liquid container (9a), the dense water that produces is through old reverse osmosis membrane concentrate recirculation pipe (70), filter out wherein insoluble matter by the second candle filter (60b), return and repair liquid container (9a), reparation liquid is recycled.
6. a kind of waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 5 and the chemistry method of repairing, it is characterized in that: the intake pressure that is obtained this film by old reverse osmosis membrane inlet gage (27), obtained the dense water lateral pressure of this film by the dense water pressure table of old reverse osmosis membrane (34), according to these two force value, obtain the two ends pressure reduction of old reverse osmosis membrane; Go out into water conductivity meter (23) to obtain into the water electrical conductivity, obtain the fresh water electrical conductivity by old reverse osmosis membrane fresh water conductivity meter (36), obtain the desalination rate of old reverse osmosis membrane according to two Conductivity Calculation; Obtain flow of inlet water by old reverse osmosis membrane flow of inlet water meter (29), obtain fresh-water flow by old reverse osmosis membrane fresh-water flow meter (37), obtain the water rate of recovery and the water yield per day of old reverse osmosis membrane according to two flow rate calculation; Obtain the basic initial performance parameter of old reverse osmosis membrane by described operation.
7. a kind of waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 5 and the chemistry method of repairing, it is characterized in that: the intake pressure that is obtained new reverse osmosis membrane by new reverse osmosis membrane inlet gage (44), obtain the dense water lateral pressure of new reverse osmosis membrane by the dense water pressure table of new reverse osmosis membrane (49), thereby obtain new reverse osmosis membrane two ends pressure reduction; Obtained into the water electrical conductivity by new reverse osmosis membrane water inlet conductivity meter (45), obtain the fresh water electrical conductivity by new reverse osmosis membrane fresh water conductivity meter (51), calculate the desalination rate of new reverse osmosis membrane; Obtain flow of inlet water by new reverse osmosis membrane flow of inlet water meter (43), obtain fresh-water flow by new reverse osmosis membrane fresh-water flow meter (52), calculate the water rate of recovery and the water yield per day of new reverse osmosis membrane; Obtain the properties data of new reverse osmosis membrane by described operation, be used for and the properties data of old reverse osmosis membrane compare.
8. waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 5 and the chemistry method of repairing, it is characterized in that: wash liquid stream is through reverse osmosis membrane when surface and different dirty class generation chemical reaction, part cleaning fluid passes reverse osmosis membrane surface and forms cleaning fluid fresh water under the effect of pressure, the remainder reverse osmosis membrane surface of flowing through forms the dense water of cleaning fluid that contains dirty class material; When repairing liquid and flowing through the reverse osmosis membrane surface, under the effect of pressure, a part is repaired liquid and is passed the reverse osmosis membrane surface, carries out chemical reaction with the reverse osmosis membrane material, with large fenestra reparation, dwindle, forms and repairs liquid fresh water; Flow through reverse osmosis membrane surface of another part forms and repairs the dense water of liquid, then all is back to the reparation liquid container.
9. waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 5 and the chemistry method of repairing, it is characterized in that: chemical cleaning solution recycles, the insoluble matter that cleans out is filtered by on-line continuous in cyclic process, realize to save the chemical cleaning solution consumption, reduces the chemical reagent discharging and cause the purpose of environmental pollution; According to the pH meter show value, judge the variation of concentration of lotion, in time replenish and regulate cleaning fluid.
10. waste and old reverse-osmosis membrane element Chemical cleaning as claimed in claim 5 and the chemistry method of repairing, it is characterized in that: be provided with old reverse osmosis membrane fresh water sample valve (40), the dense water sampling valve of old reverse osmosis membrane (39), new reverse osmosis membrane fresh water sample valve (57), the new dense water sampling valve of reverse osmosis membrane (56) among the present invention, be used for the off-line sampling and analysing; By the pollution index meter on the SDI sample valve (62) that is installed in the second candle filter, can obtain dirt sample and the composition on reverse osmosis membrane surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010600223 CN102085455B (en) | 2010-12-22 | 2010-12-22 | Chemical cleaning and chemical repairing method and system for waste reverse osmosis membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010600223 CN102085455B (en) | 2010-12-22 | 2010-12-22 | Chemical cleaning and chemical repairing method and system for waste reverse osmosis membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102085455A CN102085455A (en) | 2011-06-08 |
| CN102085455B true CN102085455B (en) | 2013-01-02 |
Family
ID=44097607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010600223 Expired - Fee Related CN102085455B (en) | 2010-12-22 | 2010-12-22 | Chemical cleaning and chemical repairing method and system for waste reverse osmosis membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102085455B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2764806T3 (en) * | 2012-04-15 | 2020-06-04 | Ben Gurion Univ | Method and apparatus for performing high recovery desalination with pressure actuated membranes |
| US10245556B2 (en) | 2012-04-15 | 2019-04-02 | Ben Gurion University Of The Negev Research And Development Authority | Method and apparatus for effecting high recovery desalination with pressure driven membranes |
| CN103331102B (en) * | 2013-06-21 | 2015-04-08 | 山西太钢不锈钢股份有限公司 | Offline cleaning and evaluating device of reverse osmosis membrane element and application method of device |
| CN104961198A (en) * | 2015-07-10 | 2015-10-07 | 沁园集团股份有限公司 | Reverse osmosis water purifier and de-scaling method for same |
| CN105536549B (en) * | 2015-12-18 | 2018-04-20 | 无锡德宝水务投资有限公司 | A kind of cleaning method of the fluorine-containing nitrogen-containing wastewater processing reverse osmosis membrane apparatus of electronics industry |
| CN105664560B (en) * | 2016-04-14 | 2018-02-23 | 济南西斯普换热系统有限公司 | A kind of foldable filter element on-line cleaning machine and its cleaning |
| CN106861442A (en) * | 2017-04-14 | 2017-06-20 | 湖南北控威保特环境科技股份有限公司 | The purging system and cleaning method of a kind of tubular ultrafiltration membrane module |
| CN108854545A (en) * | 2017-05-08 | 2018-11-23 | 上海澄沥环保科技有限公司 | A kind of reverse osmosis nanofiltration system monitoring deviation prompts technology in time |
| ES2800549B2 (en) * | 2019-06-24 | 2022-04-01 | Consejo Superior Investigacion | INSTALLATION FOR WATER FILTRATION BY REVERSE OSMOSIS AND ULTRAFILTRATION |
| CN111957214A (en) * | 2020-09-11 | 2020-11-20 | 浙江浙能技术研究院有限公司 | Multipurpose reverse osmosis membrane element performance testing device and testing method |
| CN112999881B (en) * | 2021-03-17 | 2021-11-12 | 同济大学 | Method for treating scrapped PVDF (polyvinylidene fluoride) membrane by recycling water |
| CN114082304A (en) * | 2021-12-09 | 2022-02-25 | 德州海纳祺环保科技有限公司 | Full-automatic reverse osmosis membrane cleaning equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5122265A (en) * | 1991-07-10 | 1992-06-16 | Hoh Water Technology Corp. | Compact reverse osmosis system with cold water flush |
| CN2701523Y (en) * | 2004-03-11 | 2005-05-25 | 杨胜艾 | A washing unit with reverse osmosis membrane |
| CN1696067A (en) * | 2005-04-29 | 2005-11-16 | 国家海洋局天津海水淡化与综合利用研究所 | Reverse cleaning system including off line module of reverse osmosis membrane |
| JP2007000788A (en) * | 2005-06-24 | 2007-01-11 | Sasakura Engineering Co Ltd | Water treatment apparatus using reverse osmosis membrane |
-
2010
- 2010-12-22 CN CN 201010600223 patent/CN102085455B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5122265A (en) * | 1991-07-10 | 1992-06-16 | Hoh Water Technology Corp. | Compact reverse osmosis system with cold water flush |
| CN2701523Y (en) * | 2004-03-11 | 2005-05-25 | 杨胜艾 | A washing unit with reverse osmosis membrane |
| CN1696067A (en) * | 2005-04-29 | 2005-11-16 | 国家海洋局天津海水淡化与综合利用研究所 | Reverse cleaning system including off line module of reverse osmosis membrane |
| JP2007000788A (en) * | 2005-06-24 | 2007-01-11 | Sasakura Engineering Co Ltd | Water treatment apparatus using reverse osmosis membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102085455A (en) | 2011-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102085455B (en) | Chemical cleaning and chemical repairing method and system for waste reverse osmosis membrane | |
| CN102674590A (en) | Method for treating and recycling heavy metal wastewater by double-membrane process | |
| CN102814123A (en) | Reverse osmosis membrane chemical cleaning method | |
| CN103601310A (en) | Water processing method and device thereof of seawater desalination system | |
| CN201885472U (en) | Printing and dyeing wastewater heat energy recovery system | |
| CN108176229B (en) | Pollution control method for ultrafiltration filter element in water treatment | |
| CN101215022A (en) | Water treatment method and water continuous treatment device | |
| CN206255935U (en) | A kind of 50 tons of intermediate water reuse systems per hour | |
| CN202430070U (en) | Heavy metal wastewater treatment and recycling equipment using two-membrane process | |
| CN207748952U (en) | A kind of electroplating wastewater reclaimer | |
| CN206692490U (en) | A kind of ultrapure water system | |
| CN202046956U (en) | Automatic control type backwashable reverse osmosis water purification machine | |
| CN203373223U (en) | Water treatment device of seawater desalination system | |
| CN207002478U (en) | A kind of new DW system demineralized water system after improvement | |
| CN219031837U (en) | Hydrogen-conductive resin regeneration system | |
| CN201109731Y (en) | Water continuous treater | |
| CN202658029U (en) | System for recycling acid-containing wastewater in process of welding rod production | |
| CN107261852A (en) | A kind of cleaning equipment and cleaning method of iron pollution micro-filtration/milipore filter | |
| CN213446656U (en) | Cotton filter core belt cleaning device of cartridge filter PP | |
| CN211734053U (en) | Be used for iron oxide red waste water treatment to use device | |
| CN207237725U (en) | A kind of cleaning equipment of iron pollution micro-filtration/ultrafiltration membrane | |
| CN209702419U (en) | Movable type elution water treatment facilities | |
| CN203803392U (en) | Integrated device for off-line cleaning and detecting of 8-inch reverse osmosis membrane elements | |
| CN208742318U (en) | A kind of reverse osmosis membrane antisludging equipment | |
| CN202881022U (en) | Wastewater reclamation and reuse device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20201222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |