CN202010520U - Off-line cleaning device for reverse osmosis membrane - Google Patents
Off-line cleaning device for reverse osmosis membrane Download PDFInfo
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- CN202010520U CN202010520U CN2011200690812U CN201120069081U CN202010520U CN 202010520 U CN202010520 U CN 202010520U CN 2011200690812 U CN2011200690812 U CN 2011200690812U CN 201120069081 U CN201120069081 U CN 201120069081U CN 202010520 U CN202010520 U CN 202010520U
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Abstract
The utility model provides an off-line cleaning device for a reverse osmosis membrane, which comprises a cleaning water tank, a precision filter and a reverse osmosis membrane case, wherein a water outlet of the cleaning water tank is connected with a lifting pump and then the entrance of the precision filter through a pipe, the exit of the precision filter is connected with a water inlet and a concentrate outlet of the reverse osmosis membrane case through a forward wash/back wash control pipe, and a producing water outlet of the reverse osmosis membrane case is connected with a water inlet of the cleaning water tank through a producing water pipe. The off-line cleaning device is applied to wash the reverse osmosis (RO) membrane which is blocked after long-term use and has no reduction in desalting rate. The off-line cleaning device has the advantages of being convenient to operate, having high cleaning efficiency and saving the cleaning cost. Besides, the off-line cleaning device achieves the effects of forward/back washing and gas-water mixed washing, so that the cleaning operation is more complete and highly efficient.
Description
Technical field
The utility model relates to a kind of reverse osmosis membrane cleaning device, particularly a kind of off-line cleaning device for reverse osmosis membrane.
Background technology
Counter-infiltration is the membrane separation technique that grows up the sixties in 20th century, utilizes permeable pressure head to realize separating of solute and solvent.In recent years, reverse osmosis technology has obtained developing rapidly, and the desalination that is widely used in seawater is handled, and water correction is handled, pure water and PREPARATION OF ULTRA-PURE WATER, but also be applied to field of waste water treatment, water reuse in the realization, conserve water resource.
Because the water inlet of counter-infiltration system inevitably contains scale-forming ion, the solid suspension of trace, a small amount of microorganism etc., along with system moves for a long time, will inevitably deposit a large amount of dirts on reverse osmosis membrane, membrane flux can descend rapidly, thereby influences the normal water supply of counter-infiltration system, serious words can be stopped up reverse osmosis membrane, influence normal industrial production.Therefore, for carrying out smoothly of the operate as normal that guarantees reverse osmosis unit and production, take to change the method for film usually, and the useless film that those change normally since deposit stop up and cause membrane flux to descend, their salt rejection rate does not descend, and also has the value and the space that utilize again.
The utility model content
The purpose of this utility model provides a kind of off-line cleaning device for reverse osmosis membrane, is used to clean those because deposit stops up the reverse osmosis membrane that causes membrane flux to descend and can't normally use.
For achieving the above object, off-line cleaning device for reverse osmosis membrane provided by the utility model, comprise and clean water tank 30, accurate filter 21 and pressure vessel for reverse osmosis 23, wherein: the delivery port that cleans water tank 30 is connected through pipeline through the inlet of elevator pump 20 with accurate filter 21; The outlet of accurate filter 21 is connected through positive backwash control valve road with the condensed water delivery port with the water inlet of pressure vessel for reverse osmosis 23, and the product water delivery port of pressure vessel for reverse osmosis 23 is connected with the water inlet multiparity waterpipe that cleans water tank 30.
Described positive backwash control valve road is used to control the flow direction from the water of accurate filter: when just washing, control water flows into from the water inlet of pressure vessel for reverse osmosis 23; When backwash, control water flows into from the condensed water delivery port of pressure vessel for reverse osmosis 23.
Preferable, described positive backwash control valve road comprises the positive flushing pipe of the water inlet of the outlet that connects accurate filter 21 and pressure vessel for reverse osmosis 23, and the backwash pipeline that connects the condensed water delivery port of the outlet of accurate filter 21 and pressure vessel for reverse osmosis 23; Establish valve 10 on the described positive flushing pipe,, establish valve 9 on the described backwash outlet conduit between the water inlet of valve 10 and pressure vessel for reverse osmosis 23, establishing the backwash outlet conduit on the positive flushing pipe; Establish valve 8 on the described backwash pipeline, just flush out waterpipe in establishing on the backwash pipeline between the condensed water delivery port of valve 8 and pressure vessel for reverse osmosis 23, described just flushing out established valve 11 on the waterpipe.Valve 8,9,10,11 can be selected butterfly valve for use, controls by the switching of valve 8,9,10,11 and just washes still backwash.
Preferable, describedly just flushing out waterpipe and the backwash outlet conduit all communicates with the water producing pipe road.
Preferable, the described port of export that is just flushing out waterpipe and backwash outlet conduit is merged into an outlet conduit, and described outlet conduit communicates with the water producing pipe road.
Preferable, described outlet conduit is provided with flowmeter.
Further, above-mentioned off-line cleaning device for reverse osmosis membrane provided by the utility model, also comprise the gas scrubbing pipeline that communicates with compressed air, one end of described gas scrubbing pipeline connects the water inlet of pressure vessel for reverse osmosis, the other end connects the condensed water delivery port of pressure vessel for reverse osmosis, and the two ends of described gas scrubbing pipeline are equipped with valve.Control compressed-air actuated airintake direction by the closure or openness of valve, and whether need to carry out gas scrubbing.
Further, above-mentioned off-line cleaning device for reverse osmosis membrane provided by the utility model also comprises the electrical conductivity testing conduit that links to each other with the product water delivery port of pressure vessel for reverse osmosis, and described electrical conductivity testing conduit is provided with conductivity probe and valve 14.Switching by valve 14 makes product water enter the electrical conductivity testing conduit, and judges the cleaning situation of reverse osmosis membrane by the reading on the conductivity probe.The port of export of electrical conductivity testing conduit can merge with above-mentioned outlet conduit or communicate with the external world.
Preferably, in the above-mentioned off-line cleaning device for reverse osmosis membrane, described water producing pipe road is provided with flowmeter.
Preferably, in the above-mentioned off-line cleaning device for reverse osmosis membrane, conductivity probe and Pressure gauge are established in the exit of accurate filter 21, are used for observing the electrical conductivity of water and the pressure that enter pressure vessel for reverse osmosis.
Preferably, in the above-mentioned off-line cleaning device for reverse osmosis membrane, the condensed water delivery port place of pressure vessel for reverse osmosis 23 is provided with Pressure gauge.
Preferably, pressure vessel for reverse osmosis has many, be arranged in parallel between the every pressure vessel for reverse osmosis, and the water inlet of every pressure vessel for reverse osmosis and condensed water delivery port place is equipped with valve.Be arranged in parallel between described each pressure vessel for reverse osmosis and be meant that every putamina is all identical with the connected mode of various pipelines, as: the water inlet of every pressure vessel for reverse osmosis is connected with positive backwash control valve road respectively with the condensed water delivery port, and is connected with the two ends of gas scrubbing pipeline respectively; And the product water delivery port of every pressure vessel for reverse osmosis all with the electrical conductivity testing conduit.Described valve can be selected ball valve for use, by the valve of opening or closing every putamina two ends, control and whether this root putamina is cleaned, clean when promptly can realize the 1-6 root film of varying number, also can only clean several films wherein, also can realize checking respectively the cleaning situation of every putamina.
Further, above-mentioned off-line cleaning device for reverse osmosis membrane provided by the utility model also comprises heater 29, and the inlet of heater 29 is connected with the outlet of elevator pump 20, and outlet is connected with the inlet of accurate filter 21; Perhaps the inlet of heater 29 is connected with the outlet of accurate filter 21, and outlet connects described positive backwash control valve road.Heater 29 can adopt steam heater, is used for to the water body heating, to improve cleaning performance.
Preferable, temperature indicating device is established in the exit of heater 29.
Further, above-mentioned off-line cleaning device for reverse osmosis membrane provided by the utility model, also comprise discharge control pipeline, one end of described discharge control pipeline is connected with the water inlet of cleaning water tank 30, the arbitrary connection in the outlet of the other end and the outlet that is selected from elevator pump 20, heater 29 or the outlet of accurate filter 21; Establish valve 5 on the described discharge control pipeline.By valve 5 control water inlet capacities of returns, thereby further control the flow that enters the water in the putamina.
Further, above-mentioned off-line cleaning device for reverse osmosis membrane provided by the utility model comprises also and cleans the check pipeline that one end of described cleaning check pipeline is connected with the outlet of accurate filter 21, and the other end is connected with the water inlet of pressure vessel for reverse osmosis 23; Clean the check pipeline and be provided with high-pressure pump 22, valve 17 and Pressure gauge 37.Cleaning check pipeline is used for online observation cleaning back RO film and whether meets production requirement, unlatching when whether high-pressure pump 22 cleans up at the check film, the pressure of water body when valve 17 is used for control test.
Above-mentioned off-line cleaning device for reverse osmosis membrane provided by the utility model be used to clean some owing to long-term the use produces obstruction, but salt rejection rate does not have the RO film of decline.Can pass through the quantity of the open and close controlling cleaning film of valve, easy to operate, efficient is high, and has adopted air water to mix in cleaning process simultaneously and the positive and negative alternate flushing, has improved the quality of cleaning, and makes cleaning more abundant and efficient.In addition, clean employing complete alternation pattern, the conserve water resource.After cleaning finishes, can also start online high-pressure pump, test is cleaned back RO film and whether is met production requirement.
Description of drawings
Fig. 1 is a connected mode schematic diagram of the present utility model.
Fig. 2 is the mode that the is connected in parallel schematic diagram of pressure vessel for reverse osmosis of the present utility model;
Fig. 3 is the connected mode schematic diagram of a kind of preferred implementation of the utility model.
The specific embodiment
Further set forth the utility model below in conjunction with specific embodiment, should be understood that these embodiment only be used to the utility model is described and be not used in the restriction protection domain of the present utility model.
Hereinafter with reference to the accompanying drawings the utility model RO film off-line cleaning device is described in detail.
As shown in Figure 1, off-line cleaning device for reverse osmosis membrane provided by the utility model, comprise and clean water tank 30, accurate filter 21 and pressure vessel for reverse osmosis 23, wherein: cleaning case 30 is supplied water by the two-way water pipe, one the tunnel is running water, one the tunnel is deionized water or reverse osmosis water, and by valve 18 and 19 controls, valve 2 then is used for discharging the water body of cleaning case respectively; Scavenging pump 20 is used to promote the pressure of water inlet; Accurate filter 21 is used for the impurity of filtered water inlet, the RO film that protection is cleaned; Putamina 23 is used to place the RO film that needs clean.Their connected mode is: the delivery port that cleans water tank 30 is connected through pipeline through the inlet of elevator pump 20 with accurate filter 21; The outlet of accurate filter 21 is connected through positive backwash control valve road with the condensed water delivery port with the water inlet of pressure vessel for reverse osmosis 23, and the product water delivery port of pressure vessel for reverse osmosis 23 is connected with the water inlet multiparity waterpipe that cleans water tank 30.
Described positive backwash control valve road is used to control the flow direction from the water of accurate filter: when just washing, control water flows into from the water inlet of pressure vessel for reverse osmosis 23; When backwash, control water flows into from the condensed water delivery port of pressure vessel for reverse osmosis 23.Concrete pipeline connected mode is: described positive backwash control valve road comprises the positive flushing pipe of the water inlet of the outlet that connects accurate filter 21 and pressure vessel for reverse osmosis 23, and the backwash pipeline that connects the condensed water delivery port of the outlet of accurate filter 21 and pressure vessel for reverse osmosis 23; Establish valve 10 on the described positive flushing pipe,, establish valve 9 on the described backwash outlet conduit between the water inlet of valve 10 and pressure vessel for reverse osmosis 23, establishing the backwash outlet conduit on the positive flushing pipe; Establish valve 8 on the described backwash pipeline, just flush out waterpipe in establishing on the backwash pipeline between the condensed water delivery port of valve 8 and pressure vessel for reverse osmosis 23, described just flushing out established valve 11 on the waterpipe.Valve 8,9,10,11 can be selected butterfly valve for use, controls by the switching of valve 8,9,10,11 and just washes still backwash.Just flushing out waterpipe and backwash outlet conduit and all communicating, the dense water and the product water that obtain after the cleaning are all returned in the cleaning water tank 30 with the water producing pipe road, recycling, the conserve water resource.Preferably, this port of export that is just flushing out waterpipe and backwash outlet conduit communicates with the water producing pipe road after being merged into an outlet conduit again, and flowmeter 31 is set on outlet conduit, so that observe the flow of dense water.
Further, as shown in Figure 1, above-mentioned off-line cleaning device for reverse osmosis membrane, also comprise the gas scrubbing pipeline that communicates with compressed air system, one end of this gas scrubbing pipeline connects the water inlet of pressure vessel for reverse osmosis 23, the other end connects the condensed water delivery port of pressure vessel for reverse osmosis 23, and the two ends of this gas scrubbing pipeline are equipped with valve.This valve can be selected ball valve for use, closes when closing the valve of the other end and two ends valve by the valve of opening an end, controls compressed-air actuated airintake direction, and whether needs to carry out gas scrubbing.
Further, as shown in Figure 1, above-mentioned off-line cleaning device for reverse osmosis membrane also comprises the electrical conductivity testing conduit that links to each other with the product water delivery port of pressure vessel for reverse osmosis 23, and this pipeline is provided with conductivity probe 32 and valve 14.Switching by valve 14 makes product water enter the electrical conductivity testing conduit, and judges the cleaning situation of reverse osmosis membrane by the reading on the conductivity probe.The port of export of electrical conductivity testing conduit can merge with above-mentioned outlet conduit or communicate with the external world.
As shown in Figure 2, as a kind of preferred implementation of the present utility model, pressure vessel for reverse osmosis 23 can have many, be arranged in parallel between each pressure vessel for reverse osmosis, be that every putamina is all identical with the connected mode of various pipelines: the water inlet of every pressure vessel for reverse osmosis is connected with positive backwash control valve road respectively with the condensed water delivery port, and the two ends with the gas scrubbing pipeline are connected respectively, and the product water delivery port of every pressure vessel for reverse osmosis all with the electrical conductivity testing conduit.And the water inlet of every pressure vessel for reverse osmosis and condensed water delivery port place are equipped with valve.This valve can be selected stainless steel ball valve for use, by the valve of opening or closing every putamina two ends, control and whether this root putamina is cleaned, clean when promptly can realize the 1-6 root film of varying number, also can only clean several films wherein, also can realize checking respectively the cleaning situation of every putamina.In addition, also can with positive flushing pipe that the water inlet of every putamina is connected on total valve 16 is set, with backwash pipeline that the condensed water delivery port of every putamina is connected on total valve 15 is set.
As shown in Figure 3, as another kind of preferred implementation of the present utility model, above-mentioned off-line cleaning device for reverse osmosis membrane can also comprise heater 29, is used for to the water body heating, to improve cleaning performance.This heater 29 can be placed between elevator pump and the accurate filter 21, also can be arranged at after the accurate filter 21.That is: the inlet of heater 29 is connected with the outlet of elevator pump 20, and its outlet is connected with the inlet of accurate filter 21; Perhaps the inlet of heater 29 is connected with the outlet of accurate filter 21, and outlet connects described positive backwash control valve road.Heater 29 can adopt steam heater, and valve 3 is used for controlling heating-up temperature by the control quantity of steam, and valve 4 is used for the exhaust steam condensed water.Temperature indicating device is established in the exit of heater 29.
As shown in Figure 3, as another kind of preferred implementation of the present utility model, above-mentioned off-line cleaning device for reverse osmosis membrane can also comprise discharge control pipeline, one end of described discharge control pipeline is connected with the water inlet of cleaning water tank 30, the arbitrary connection in the outlet of the other end and the outlet that is selected from elevator pump 20, heater 29 or the outlet of accurate filter 21; Establish valve 5 on the described discharge control pipeline.By valve 5 control water inlet capacities of returns, thereby further control the flow that enters the water in the putamina.
As shown in Figure 3, as another kind of preferred implementation of the present utility model, above-mentioned off-line cleaning device for reverse osmosis membrane can also comprise cleaning checks pipeline, and an end of described cleaning check pipeline is connected with the outlet of accurate filter 21, and the other end is connected respectively with the water inlet of every pressure vessel for reverse osmosis; Clean the check pipeline and be provided with high-pressure pump 22, valve 17 and Pressure gauge 37.Cleaning check pipeline is used for online observation cleaning back RO film and whether meets production requirement, unlatching when whether high-pressure pump 22 cleans up at the check film, the pressure of water body when valve 17 is used for control test.When whether the check film cleans up, outlet conduit is communicated with the external world, and on this pipeline, valve 13 is set, so that whether control discharges the external world by the condensed water that pressure vessel for reverse osmosis obtains.
Further, as shown in Figure 3, in the above-mentioned off-line cleaning device for reverse osmosis membrane, flowmeter, Pressure gauge and conductivity probe can be set as required on each pipeline.Be specially: can on the water producing pipe road, be provided with flowmeter 34; Establish conductivity probe 35 and Pressure gauge 36 in the exit of accurate filter 21, be provided with Pressure gauge 33 at the condensed water delivery port place of pressure vessel for reverse osmosis 23.
The course of work of above-mentioned off-line cleaning device for reverse osmosis membrane provided by the utility model must experience 3 stages: pickling, alkali cleaning and inspection cleaning performance.Specifically further describe as follows in conjunction with Fig. 3:
One, the pickling stage:
(1) flushing before the pickling
Open valve---1,6,7,10,11,12,13,14,15,16;
Valve-off---2 (close during flushing, only open during the emptying water tank), 3,4,5,8,9,17, compressed air minor valve.
Before pickling, at first Cistern flushing is clean with reverse osmosis water, avoid more impurity to bring in the reverse osmosis unit, after water tank cleans and finishes, in water tank, put into the reverse osmosis water of certain volume, open valve 1,6,7,10,11,12 and need the putamina Inlet and outlet water ball valve of work, valve-off 8,9 and other valve switch, open scavenging pump 20 and promptly begin to wash the cavity that needs to clean film, it is to remove dense water remaining in the cavity that the purpose of flushing is gone, in conjunction with unstable deposit and ducted impurity etc.After flushing is finished, open valve 2, put the water in the cleaning case, use the reverse osmosis water flush box.
(2) forward pickling and immersion
Open valve---1,3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 5 (being used to control flow), 6,7,10,11,12,14,15,16;
Valve-off---2,8,9,13,17, the compressed air minor valve.
Valve-off 2 adds the reverse osmosis water of corresponding mordant and certain volume in the cleaning case, open valve 1,6, and 7,10,11,12 and need putamina Inlet and outlet water switch, valve-off 8,9 and other valve switch of work.Open scavenging pump 20 and heater, the water that has mordant enters the inlet tube of RO film off-line cleaning device under the lifting of scavenging pump, heating by heater is controlled at water temperature about 40 ℃, size by valve 5 and 6 control flows, it at first is the low discharge circulation, the pressure vessel flow of every putamina is 12gpm, reduce the impurity blocking pipe under cleaning as far as possible, behind the low speed circulation 5-15min, heighten flow velocity by valve 5 and 6, enter the intermediate flow circulation, the pressure vessel flow of every putamina is 24gpm, the circulation timei of intermediate flow is suitable with the circulation timei of low discharge, after the intermediate flow circulation, heighten flow velocity by valve 5 and 6 once more, the pressure vessel flow that makes every putamina is 35-40gpm, enter big flow circulation, the time of big flow circulation is 30-60min, stop circulation after the big flow circulation, needs are cleaned the immersion treatment of taking of film, the length of soak time depends on the pollution level of film, polluting less film then soaks 1-2h and gets final product, pollute the immersion of then need spending the night of serious film, but sometimes in order to guarantee certain cleaning temperature, take the low discharge circulation immersion, the flow size is 10% of a normal circulation flow, allows pickle fully fully contact with the deposit of being washed film by immersion, helps sedimental removal, but pickle should not be crossed and contact with film for a long time in principle, just removes with deposit and is advisable.
(3) band compressed air forward pickling
Open valve---1,3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 5 (being used to control flow), 6,7,10,11,12,14,15,16, compressed air minor valve;
Valve-off---2,8,9,13,17.
After immersion is finished, carry out big flow circulation once more, different with the first time is to take positive and negative cleaning and air water to mix to clean.At first open valve 1,6,7,10,11,12 and need the putamina Inlet and outlet water switch of work, valve-off 8,9 and other valve switch, open scavenging pump 20, heighten flow velocity by valve 5 and 6, the pressure vessel flow that makes every putamina is 35-40gpm, and at this moment pickle is transported to an end of putamina through piping, entering needs to clean in the body cavity of film, open the air pressure switch (compressed air pressure is greatly about 0.6Mpa) of same end simultaneously, realize that air water mixes, make it clean more abundant the film inside cavity.This moment, water was divided into two-way: the one tunnel is that the pure water that produces is transported in the cleaning case through piping, and another road is to have the dense water that cleans impurity also to be transported in the cleaning case through piping, probably clean 10min after,
(4) be with compressed-air actuated reverse pickling
Open valve---1,3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 5 (being used to control flow), 6,7,8,9,12,14,15,16, compressed air minor valve;
Valve-off---2,10,11,13,17.
Valve-off 10,11, Open valve 8 and 9, enter reverse cleaning, the water that have mordant this moment enters from the other end of film, open the air pressure switch of same end simultaneously, last water also is to be divided into two-way: the one tunnel is that the pure water that produces is transported in the cleaning case through piping, and another road is to have the dense water that cleans impurity also to be transported in the cleaning case through piping.
About the general 10min of frequency that positive backwash is switched, airflow direction is consistent with water (flow) direction.Replacing switching by positive backwash makes pickling more thorough.Positive and negative scavenging period is at 60-120min.In acid cleaning process, rising to a certain degree can appear in PH, and this is owing to consumed the part mordant in the cleaning process, if the PH rising is too fast, can replenish certain mordant in cleaning case.After positive and negative cleaning finished, acid wash phase was finished, and the purpose of pickling mainly is to remove the scale forming matter that dissolved by acid easily (such as calcium carbonate etc.) and some impurity etc.
(5) flushing after the pickling
Open valve---1,5,6,7,10,11,12,14,15,16;
Valve-off---2 (close during flushing, only open during the emptying water tank), 3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters) 8,9,13,17, compressed air minor valve.
Pickling is opened valve 2 after finishing, and with the discharging of the pickle in the cleaning case, uses the reverse osmosis water flush box then, washes the back valve-off 2 that finishes, and puts into the reverse osmosis water of certain volume. Open valve 1,6,7,10,11,12 and need the putamina Inlet and outlet water switch of work, valve-off 8,9 and other valve switch are opened scavenging pump 20, pipeline and RO film are washed, flushing need not positive backwash switches, and also need not to open compressed air, and the time of flushing is generally rule of thumb judged with electrical conductivity, if go out water conductivity, it is generally acknowledged that the flushing in this stage finishes less than the water inlet electrical conductivity.After flushing finishes, enter the alkali cleaning stage.Open valve 2, with the water emptying in the cleaning case, valve-off 2.
Two, the alkali cleaning stage:
(1) forward alkali cleaning and immersion
Open valve---1,3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 5 (being used to control flow), 6,7,10,11,12,14,15,16;
Valve-off---2,8,9,13,17, the compressed air minor valve.
The reverse osmosis water that adds a certain amount of alkali wash water and certain volume.Open valve 1,6,7,10,11,12 and need putamina Inlet and outlet water switch, valve-off 8,9 and other valve switch of work.Open scavenging pump 20 and heater, the water that has the alkali cleaning agent enters the inlet tube of RO film off-line cleaning device under the lifting of scavenging pump, and the heating of logical heater is controlled at the temperature of water body below 40 ℃.By the size of valve 5 and 6 control flows, at first be the low discharge circulation, the pressure vessel flow of every putamina is 12gpm.Behind the low speed circulation 5-15min, heighten flow velocity by valve 5 and 6, enter the intermediate flow circulation, the pressure vessel flow of every putamina is 24gpm, the circulation timei of intermediate flow is suitable with the circulation timei of low discharge, after the intermediate flow circulation, heighten flow velocity by valve 5 and 6 once more, the pressure vessel flow that makes every putamina is 35-40gpm, enter big flow circulation, the time of big flow circulation is 30-60min, stops circulation after the big flow circulation, needs are cleaned the immersion treatment of taking of film, the soak time of alkali lye is long usually, the immersion of spending the night, and sometimes in order to guarantee certain cleaning temperature, take the low discharge circulation immersion, the flow size is 10% of a normal circulation flow, allows alkali wash water fully fully contact with the deposit of being washed film by immersion, helps sedimental removal, but alkali wash water should not be crossed and contact with film for a long time in principle, just removes with deposit and is advisable.
(2) be with compressed-air actuated forward alkali cleaning
Open valve---1,3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 5 (being used to control flow), 6,7,10,11,12,14,15,16, compressed air minor valve;
Valve-off---2,8,9,13,17.
After immersion is finished, carry out big flow circulation once more, different with the first time is to take positive and negative cleaning and air water to mix to clean.At first open valve 1,6,7,10,11,12 and need the putamina Inlet and outlet water switch of work, valve-off 8,9 and other valve switch, open scavenging pump 20, heighten flow velocity by valve 5 and 6, the pressure vessel flow that makes every putamina is 35-40gpm, and at this moment alkali wash water is transported to an end of putamina through piping, entering needs to clean in the body cavity of film, open the air pressure switch (compressed air pressure is greatly about 0.6Mpa) of same end simultaneously, realize that air water mixes, make it clean more abundant the film inside cavity.This moment, water was divided into two-way: the one tunnel is that the pure water that produces is transported in the cleaning case through piping, and another road is to have the dense water that cleans impurity also to be transported in the cleaning case through piping, probably clean 10min after,
(3) be with compressed-air actuated reverse alkali cleaning
Open valve---1,3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 5 (being used to control flow), 6,7,8,9,12,14,15,16, compressed air minor valve;
Valve-off---2,10,11,13,17.
Valve- off 10,11, Open valve 8 and 9, enter reverse cleaning, the water that have the alkali cleaning agent this moment enters from the other end of film, open the air pressure switch of same end simultaneously, last water also is to be divided into two-way: the one tunnel is that the pure water that produces is transported in the cleaning case through piping, and another road is to have the dense water that cleans impurity also to be transported in the cleaning case through piping.
About the general 10min of frequency that positive backwash is switched, airflow direction is consistent with water (flow) direction.Replacing switching by positive backwash makes alkali cleaning more thorough.Positive and negative scavenging period is at 60-120min.After positive and negative cleaning finished, alkaline wash phase was finished, and the purpose of alkali cleaning mainly is to remove inorganic colloid, organic pollution, some microorganisms and some particles suspended things.
(4) flushing after the alkali cleaning
Open valve---1,5 (being used to control flow), 6,7,10,11,12,14,15,16;
Valve-off---2 (close during flushing, only open during the emptying water tank), 3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 8,9,13,17, compressed air minor valve.
Alkali cleaning is opened valve 2 after finishing, and with the discharging of the alkali wash water in the cleaning case, uses the reverse osmosis water flush box then, washes the back valve-off 2 that finishes, and puts into the reverse osmosis water of certain volume. Open valve 1,6,7,10,11,12 and need the putamina Inlet and outlet water switch of work, valve-off 8,9 and other valve switch are opened scavenging pump 20, and pipeline and RO film are washed, and flushing need not positive backwash switches, and also need not to open compressed air.The time of flushing is generally rule of thumb judged with electrical conductivity, if go out water conductivity less than the water inlet electrical conductivity, it is generally acknowledged that the flushing in this stage finishes.
Three. check the cleaning performance stage:
Open valve---1,5 (being used to control flow), 6,7,11,12,13,14,15,17;
Valve-off---2 (close during flushing, only open during the emptying water tank), 3 (the control quantity of steam is controlled temperature), 4 (exhaust steam condensed waters), 8,9,10,16, compressed air minor valve.
After this cleaning process is finished, need assess the effect of cleaning.Open valve 2, bleed off the water in the cleaning case.Valve-off 2 then, open valve 19, put into the running water of certain volume. Open valve 1,6,7,11,12,13,17 and need the putamina Inlet and outlet water switch of work, valve- off 8,9,10,16 and other valve switch, open high-pressure pump 22, by the adjusting of valve 5 and 6 water inlet pipe pressure is controlled within limits: be controlled at 0.7-0.8mpa summer usually, be controlled at 1.0-1.2mpa winter.After the normal operation of system, if salt rejection rate＞97%, every film produces discharge greatly about 1m
3/ h illustrates that this film has met the needs of production, if can not satisfy, need clean again film.If all can not meet the demands, illustrate that this film can not realize utilizing with the cleaning means again through cleaning several times.
Above-mentioned design example only is used for the utility model is described, and does not constitute the restriction to the claim scope, and other substantial equivalence means that it may occur to persons skilled in the art that are all in the utility model claim scope.
Claims (17)
1. off-line cleaning device for reverse osmosis membrane, it is characterized in that: comprise and clean water tank (30), accurate filter (21) and pressure vessel for reverse osmosis (23), wherein: the delivery port that cleans water tank (30) is connected through pipeline through the inlet of elevator pump (20) with accurate filter (21); The outlet of accurate filter (21) is connected through positive backwash control valve road with the condensed water delivery port with the water inlet of pressure vessel for reverse osmosis (23), and the product water delivery port of pressure vessel for reverse osmosis (23) is connected with the water inlet multiparity waterpipe that cleans water tank (30).
2. off-line cleaning device for reverse osmosis membrane as claimed in claim 1, it is characterized in that: described positive backwash control valve road comprises the positive flushing pipe of the water inlet of the outlet that connects accurate filter (21) and pressure vessel for reverse osmosis (23), and the backwash pipeline that connects the condensed water delivery port of the outlet of accurate filter (21) and pressure vessel for reverse osmosis (23); Establish valve (10) on the described positive flushing pipe,, establish valve (9) on the described backwash outlet conduit between the water inlet of valve (10) and pressure vessel for reverse osmosis (23), establishing the backwash outlet conduit on the positive flushing pipe; Establish valve (8) on the described backwash pipeline, just flush out waterpipe in establishing on the backwash pipeline between the condensed water delivery port of valve (8) and pressure vessel for reverse osmosis (23), described just flushing out established valve (11) on the waterpipe.
3. off-line cleaning device for reverse osmosis membrane as claimed in claim 2 is characterized in that: describedly just flushing out waterpipe and the backwash outlet conduit all communicates with the water producing pipe road.
4. off-line cleaning device for reverse osmosis membrane as claimed in claim 2 is characterized in that: the described port of export that is just flushing out waterpipe and backwash outlet conduit is merged into an outlet conduit, and described outlet conduit communicates with the water producing pipe road.
5. off-line cleaning device for reverse osmosis membrane as claimed in claim 4 is characterized in that: described outlet conduit is provided with flowmeter (31).
6. off-line cleaning device for reverse osmosis membrane as claimed in claim 1, it is characterized in that: also comprise the gas scrubbing pipeline that communicates with compressed air, one end of described gas scrubbing pipeline connects the water inlet of pressure vessel for reverse osmosis (23), the other end connects the condensed water delivery port of pressure vessel for reverse osmosis (23), and the two ends of described gas scrubbing pipeline are equipped with valve.
7. off-line cleaning device for reverse osmosis membrane as claimed in claim 1 is characterized in that: also comprise with pressure vessel for reverse osmosis (23) and produce the electrical conductivity testing conduit that the water delivery port links to each other, described electrical conductivity testing conduit is provided with conductivity probe (32) and valve (14).
8. off-line cleaning device for reverse osmosis membrane as claimed in claim 1 is characterized in that: described water producing pipe road is provided with flowmeter (34).
9. off-line cleaning device for reverse osmosis membrane as claimed in claim 1 is characterized in that: conductivity probe (35) and Pressure gauge (36) are established in the exit of accurate filter (21).
10. off-line cleaning device for reverse osmosis membrane as claimed in claim 1 is characterized in that: the condensed water delivery port place of pressure vessel for reverse osmosis (23) is provided with Pressure gauge (33).
11. as arbitrary described off-line cleaning device for reverse osmosis membrane among the claim 1-10, it is characterized in that: pressure vessel for reverse osmosis (23) has many, be arranged in parallel between the every pressure vessel for reverse osmosis, and the water inlet of every pressure vessel for reverse osmosis and condensed water delivery port place are equipped with valve.
12. off-line cleaning device for reverse osmosis membrane as claimed in claim 11 is characterized in that: also comprise heater (29), the inlet of heater (29) is connected with the outlet of elevator pump (20), and its outlet is connected with the inlet of accurate filter (21); Perhaps the inlet of heater (29) is connected with the outlet of accurate filter (21), and its outlet connects described positive backwash control valve road.
13. off-line cleaning device for reverse osmosis membrane as claimed in claim 12 is characterized in that: temperature indicating device is established in the exit of heater (29).
14. off-line cleaning device for reverse osmosis membrane as claimed in claim 12 is characterized in that: also comprise discharge control pipeline, an end of described discharge control pipeline is connected with the water inlet that cleans water tank (30), and the other end is connected with the outlet of heater (29); Establish valve (5) on the described discharge control pipeline.
15. off-line cleaning device for reverse osmosis membrane as claimed in claim 11, it is characterized in that: also comprise discharge control pipeline, one end of described discharge control pipeline is connected with the water inlet that cleans water tank (30), and the other end is connected with the outlet of elevator pump (20) or the outlet of accurate filter (21); Establish valve (5) on the described discharge control pipeline.
16. off-line cleaning device for reverse osmosis membrane as claimed in claim 11, it is characterized in that: also comprise and clean the check pipeline, one end of described cleaning check pipeline is connected with the outlet of accurate filter (21), and the other end is connected with the water inlet of pressure vessel for reverse osmosis (23); Described cleaning check pipeline is provided with high-pressure pump (22), valve (17) and Pressure gauge (37).
17. off-line cleaning device for reverse osmosis membrane as claimed in claim 15, it is characterized in that: also comprise and clean the check pipeline, one end of described cleaning check pipeline is connected with the outlet of accurate filter (21), and the other end is connected with the water inlet of pressure vessel for reverse osmosis (23); Described cleaning check pipeline is provided with high-pressure pump (22), valve (17) and Pressure gauge (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200690812U CN202010520U (en) | 2011-03-16 | 2011-03-16 | Off-line cleaning device for reverse osmosis membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200690812U CN202010520U (en) | 2011-03-16 | 2011-03-16 | Off-line cleaning device for reverse osmosis membrane |
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| Publication Number | Publication Date |
|---|---|
| CN202010520U true CN202010520U (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200690812U Expired - Lifetime CN202010520U (en) | 2011-03-16 | 2011-03-16 | Off-line cleaning device for reverse osmosis membrane |
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|---|---|
| CN (1) | CN202010520U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407077A (en) * | 2011-12-09 | 2012-04-11 | 佛山市新泰隆环保设备制造有限公司 | Regenerating method and device of abandoned reverse osmosis membrane element |
| CN102551097A (en) * | 2011-12-23 | 2012-07-11 | 四川大学 | Efficient desalting device and efficient desalting method for salted egg white |
| CN104209007A (en) * | 2014-09-11 | 2014-12-17 | 镇江华域环保设备制造有限公司 | Flux recovery and maintenance method for water purification filtering element |
| CN104524980A (en) * | 2014-11-28 | 2015-04-22 | 北京碧水源膜科技有限公司 | Membrane element post-treatment system and method |
| CN104524844A (en) * | 2014-12-31 | 2015-04-22 | 上海市安装工程集团有限公司 | Method for cleaning filter tank |
| CN103566770B (en) * | 2013-10-31 | 2016-06-01 | 佛山市清淇水处理科技有限公司 | A kind of gas mixing type water off-line cleaning device for reverse osmosis membrane |
| CN106731843A (en) * | 2016-12-26 | 2017-05-31 | 临涣水务股份有限公司 | A kind of reverse osmosis membrane all-in-one |
| CN106823820A (en) * | 2017-03-03 | 2017-06-13 | 同济大学 | A kind of integrated apparatus for obtaining metal film operation and cleaning duty parameter |
| CN108579442A (en) * | 2018-05-22 | 2018-09-28 | 王金龙 | It is a kind of to strengthen reverse osmosis offline cleaning test method |
| CN109603554A (en) * | 2019-01-28 | 2019-04-12 | 深圳市亿霖环保科技有限公司 | A kind of electroplate liquid intelligent filtering device |
| CN110787512A (en) * | 2019-09-24 | 2020-02-14 | 成都思达能环保设备有限公司 | Pickling process for metal filter element |
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2011
- 2011-03-16 CN CN2011200690812U patent/CN202010520U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407077A (en) * | 2011-12-09 | 2012-04-11 | 佛山市新泰隆环保设备制造有限公司 | Regenerating method and device of abandoned reverse osmosis membrane element |
| CN102551097A (en) * | 2011-12-23 | 2012-07-11 | 四川大学 | Efficient desalting device and efficient desalting method for salted egg white |
| CN103566770B (en) * | 2013-10-31 | 2016-06-01 | 佛山市清淇水处理科技有限公司 | A kind of gas mixing type water off-line cleaning device for reverse osmosis membrane |
| CN104209007A (en) * | 2014-09-11 | 2014-12-17 | 镇江华域环保设备制造有限公司 | Flux recovery and maintenance method for water purification filtering element |
| CN104524980A (en) * | 2014-11-28 | 2015-04-22 | 北京碧水源膜科技有限公司 | Membrane element post-treatment system and method |
| CN104524844B (en) * | 2014-12-31 | 2016-02-24 | 上海市安装工程集团有限公司 | For the liquid level controlling method of filter tank cleaning |
| CN104524844A (en) * | 2014-12-31 | 2015-04-22 | 上海市安装工程集团有限公司 | Method for cleaning filter tank |
| CN106731843A (en) * | 2016-12-26 | 2017-05-31 | 临涣水务股份有限公司 | A kind of reverse osmosis membrane all-in-one |
| CN106823820A (en) * | 2017-03-03 | 2017-06-13 | 同济大学 | A kind of integrated apparatus for obtaining metal film operation and cleaning duty parameter |
| CN108579442A (en) * | 2018-05-22 | 2018-09-28 | 王金龙 | It is a kind of to strengthen reverse osmosis offline cleaning test method |
| CN108579442B (en) * | 2018-05-22 | 2020-03-27 | 青岛锦龙弘业环保有限公司 | Enhanced reverse osmosis off-line cleaning test method |
| CN109603554A (en) * | 2019-01-28 | 2019-04-12 | 深圳市亿霖环保科技有限公司 | A kind of electroplate liquid intelligent filtering device |
| CN110787512A (en) * | 2019-09-24 | 2020-02-14 | 成都思达能环保设备有限公司 | Pickling process for metal filter element |
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