CN108339407A - A kind of efficiently reverse osmosis offline cleaning test device and method - Google Patents
A kind of efficiently reverse osmosis offline cleaning test device and method Download PDFInfo
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- CN108339407A CN108339407A CN201810484199.8A CN201810484199A CN108339407A CN 108339407 A CN108339407 A CN 108339407A CN 201810484199 A CN201810484199 A CN 201810484199A CN 108339407 A CN108339407 A CN 108339407A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/162—Use of acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/164—Use of bases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/086—Investigating permeability, pore-volume, or surface area of porous materials of films, membranes or pellicules
Abstract
The invention discloses a kind of efficiently reverse osmosis offline cleaning test device and method, equipment includes cleaning water tank, cleaning pump, water inlet pipe filter, test water tank, test pump, dense water pipe filter, film frame, pressure vessel, pipeline, valve and the instrument for connecting above equipment；Water tank is cleaned to generate equipped with jet aerator strengthening foam；Pressure vessel tilts installation, empties and dries conducive to water in film, changes film surface state.Cleaning performance of the present invention is good, and reverse osmosis standardization flow recovery can be more than 90%；Optimize cleaning agent and cleaning method, foam is generated by the jet aerator tested in water tank, air water strengthens cleaning；By to drying after Membrane cleaning, clean again, changing the contact conditions of film surface and pollutant, realizing and strengthen cleaning；According to membrane component features of pollution, specific aim is cleaned, and strengthens cleaning performance；Device integration testing and cleaning function；Method has wide applicability, is generally applicable to all kinds of reverse osmosis membrane cleanings.
Description
Technical field
The invention belongs to water-treatment technology fields, and in particular to a kind of efficiently reverse osmosis offline cleaning test device and side
Method.
Background technology
The double membrane process of filtration-reverse osmosis are the desalinating process of mainstream now, are widely used in sea water desalination, recirculated cooling water
Refinement treatment reuse etc. after desalination, advanced treatment of wastewater.Long-term running counter-infiltration system, only on-line cleaning have been unable to meet
Service requirement, transmembrane pressure incrementally increase, and water yield gradually reduces or even salt rejection rate declines, and has seriously affected system performance, needs
Periodically offline cleaning.
Traditional reverse osmosis membrane is cleaned offline, is focused in medicament kind and concentration more, in terms of cleaning method
It explores less；For cleaning device, in terms of focusing on automation control, although or be integrated with test and cleaning function, exist
Design defect can not be used directly or ineffective.
In terms of focusing on automation control such as CN201620357905.9, CN201420067419.4, increase automatically controls
Device realizes that cleaning process automatically controls, but using Conventional cleaning methods.As CN201621043872.7 only has cleaning work(
Can, it can not be tested, cleaning performance can not be evaluated.As although CN201620903391.2 has offline cleaning and test
Function, but Membrane cleaning can only carry out in a direction, and when fouling membrane, positive and negative alternate cleans better, and system does not have
Standby correlation function.As CN201210270583.0 considers method for suppersonic cleaning on the basis of medicament, but to equipment requirement compared with
Height, cleaning process need to dismantle film repeatedly, and manual operation load is larger.Such as CN201310250776.4, such as CN201210005663.3,
It is traditional cleaning method, only there is improvement in terms of medicament, but counter-infiltration system is differed greatly due to influent quality, and dirt is caused
Dye situation has very big difference, it is difficult to realize preferable cleaning by the adjustment of simple medicament.
In engineering practice, it is badly in need of the off-line cleaning device for reverse osmosis membrane for being generally applicable in and being simple and efficient and method, passes through medicine
While agent adjusts, further the off-line cleaning method of reverse osmosis membrane, mode should be explored, improved conscientiously reverse osmosis offline
Cleaning efficiency.
Invention content
Based on above-mentioned technical problem, the present invention provides a kind of efficiently reverse osmosis offline cleaning test device and method.
The adopted technical solution is that：
It is a kind of efficiently reverse osmosis offline cleaning test device, which is characterized in that including cleaning water tank (QS1), cleaning pump (X2), into
Water pipe filter (X4), test pump (Y2), dense water pipe filter (Y4), film frame, pressure vessel (YL), connects test water tank (CS1)
Connect the pipeline, valve and instrument of above equipment；
It is installed in parallel multiple pressure vessels (YL) on the film frame, a membrane component is installed in each pressure vessel (YL)；
Water inlet pipe, water producing pipe, concentrated water pipe, pressure vessel water inlet snorkel (TQ1), the pressure vessel of each pressure vessel (YL) are dense
Water blow-down pipe (TQ2), probe tube are set up in parallel and are respectively equipped with valve, water inlet pipe, the production water of each pressure vessel (YL)
Pipe, concentrated water pipe enter water inlet manifold (X), production supply mains (C), concentrated water manifold (Y) after summarizing respectively；Water inlet manifold (X) and concentrated water
Manifold (Y) imports water tank return duct (Z) and passes back into cleaning water tank (QS1)；
Cleaning water tank (QS1) side bottom is communicated with water inlet manifold (X), the side from cleaning water tank (QS1) to water inlet manifold (X)
To setting gradually cleaning water tank outlet valve (X1), cleaning pump (X2), pressure gauge (X3), water inlet pipe filter before water inlet pipe filter
(X4), pressure gauge (X5), water inlet pipe check-valves (X6), water inlet pipe early gate (X7), water inlet pipe late gate after water inlet pipe filter
(X8), water tank return duct (Z) is imported；Water inlet manifold (X) divides between water inlet pipe early gate (X7) and water inlet pipe late gate (X8)
It is not communicated with the water inlet pipe of each pressure vessel (YL)；
Test water tank (CS1) side bottom is communicated with concentrated water manifold (Y), the side from test water tank (CS1) to concentrated water manifold (Y)
Pressure gauge (Y3), dense water pipe filter to before setting gradually test tank outlet valve (Y1), test pump (Y2), dense water pipe filter
(Y4), pressure gauge (Y5), concentrated water pipe check-valves (Y6) after dense water pipe filter, concentrated water pipe early gate (Y7), concentrated water pipe late gate
(Y8), water tank return duct (Z) is imported；Concentrated water manifold (Y) divides between concentrated water pipe early gate (Y7) and concentrated water pipe late gate (Y8)
It is not communicated with the concentrated water pipe of each pressure vessel (YL)；
After the water inlet manifold (X) imports water tank return duct (Z) with concentrated water manifold (Y), by the hook gauge (Z1) that flows back, reflux
Flowmeter for pipe (Z2) is back to cleaning water tank (QS1)；
After the water producing pipe of each pressure vessel (YL) summarizes production supply mains (C), by producing water main pipe pressure table (C1), production
Water main conduit flow counts (C2) and is back to cleaning water tank (QS1).
Preferably, it is communicated by the first connecting tube (L1) between the water inlet manifold (X) and concentrated water manifold (Y)；First connects
It takes over the one end (L1) to communicate between water inlet pipe check-valves (X6) and water inlet pipe early gate (X7) with water inlet manifold (X), first connects
(L1) other end is taken over to communicate between concentrated water pipe check-valves (Y6) and concentrated water pipe early gate (Y7) with concentrated water manifold (Y).
Preferably, the water inlet pipe on the pressure vessel (YL) is equipped with pressure vessel water inlet valve (M1), holds in pressure
Pressure vessel water inlet snorkel (TQ1) is equipped between device water inlet valve (M1) and pressure vessel (YL), pressure vessel water inlet is logical
Tracheae (TQ1) is equipped with pressure vessel water inlet breather pipe valve (M3)；Concentrated water pipe on the pressure vessel (YL) holds equipped with pressure
Device concentrated water tube valve (M2) is put between pressure vessel concentrated water tube valve (M2) and pressure vessel (YL) equipped with pressure vessel concentrated water
Blank pipe (TQ2), pressure vessel concentrated water blow-down pipe (TQ2) are equipped with pressure vessel concentrated water emptying tube valve (M4)；The pressure vessel
(YL) two end side surface, one end are communicated with water producing pipe, and one end is communicated with probe tube, and probe tube is equipped with sampling tube valve (M5)；Institute
The water inlet pipe and concentrated water pipe for stating pressure vessel (YL) are diagonally arranged, in cylindrical side and the pressure vessel (YL) of pressure vessel (YL)
It communicates；The pressure vessel (YL) tilts installation, is 30-60 ° with horizontal direction angle, pressure vessel water inlet snorkel (TQ1)
Upper, pressure vessel concentrated water blow-down pipe (TQ2) is under.
Preferably, cleaning water tank (QS1) side bottom is equipped with cleaning water tank blow-down pipe, cleans on water tank blow-down pipe and sets
There is cleaning water tank blow valve door (QS2)；Cleaning water tank (QS1) side bottom is communicated with water inlet manifold (X), water inlet manifold
(X) center and cleaning water tank (QS1) distance from bottom are the 1/4-1/5 for cleaning water tank (QS1) peak level；The cleaning water tank
(QS1) bottom is equipped with jet aerator (QS3), and jet aerator (QS3) one end connecting tube passes through water tank with water tank return duct (Z)
Reflux tube valve (Z4) communicates, and other end connecting tube is communicated with vent stack (TQ)；The other end of the vent stack (TQ) with
Air communicates；Test water tank (CS1) side bottom is equipped with test water tank blow-down pipe, and test water tank blow-down pipe is equipped with test
Water tank is vented valve (CS2).
Preferably, the water tank return duct (Z) is equipped with return branch pipe, return branch before water tank reflux tube valve (Z4)
Pipe is equipped with return branch tube valve (Z3), and return branch pipe communicates more than high water tank with air, return branch pipe nozzle
Vertically downward, phegma can flow automatically from return branch pipe enters cleaning water tank (QS1).
A kind of efficiently reverse osmosis offline cleaning test method, using above equipment, feature includes the following steps：
1) preceding test is washed：All valves of system are closed before test before washing, and test water tank (CS1) injects test water to most
High water level opens test tank outlet valve (Y1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1), pressure successively
Force container concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve (Z3) are opened test pump (Y2), are reached
Film intake pressure opens the sampling tube valve (M5) on probe tube, and exhaust, sampling are the flow of inlet water of each branch film of test record, dense
Water flow, production water flow, water inlet conductance, production water power lead, water temperature, intake pressure, produce water pressure, concentrated water pressure；
2) it sterilizes：All valves of system are closed before sterilization, cleaning water tank (QS1) injection ejected wash water to peak level,
Configure the non-oxidative antimicrobial of 300-500mg/L；Cleaning water tank outlet valve (X1), water inlet pipe early gate (X7), pressure are opened successively
Force container water inlet valve (M1), pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve
(Z3), cleaning pump (X2) is opened, circular flow Q is recycled 1 hour；Open the cleaning water tank blow valve door of cleaning water tank (QS1)
(QS2) water tank empties；
3) it rinses：All valves of system are closed before rinsing, and open the cleaning water tank blow valve door of cleaning water tank (QS1)
(QS2) water tank is emptied, after clear water rinses, closes cleaning water tank blow valve door (QS2), injection ejected wash water to highest liquid level；Successively
Cleaning water tank outlet valve (X1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1), pressure vessel concentrated water is opened to put
Blank pipe valve (M4) opens cleaning pump (X2), with 120-150%Q flow flush, 30min-60min is rinsed, until pressure vessel
(YL) difference of pH and cleaning water tank (QS1) interior pH at the concentrated water pipe on<0.5, emptying cleaning water tank (QS1)；
4) EDTA alkali cleanings：All valves of system are closed before EDTA alkali cleanings, and cleaning water tank (QS1) injects ejected wash water to most
High water level, configuration 1-2%EDTA-4Na, configuration 0.05-0.1% dodecyl sulphonic acid sodiums, configuration alkaline pH adjusting agent adjust pH
To 11.5-12.0, control ejected wash water water temperature is at 32-35 DEG C；Cleaning water tank outlet valve (X1), water inlet pipe early gate are opened successively
(X7), pressure vessel water inlet valve (M1), pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch
Tube valve (Z3) opens cleaning pump (X2), recycles 30min with 120%-150%Q flows, closes valve after cleaning pump (X2), concentrated water pipe
Door (Y8) opens cleaning pump (X2), concentrated water pipe late gate (Y8) after 5min, recycles 30min with Q flows, recycles in this way past
Multiple, until recycling 5 hours, it is P1 to recycle front and back membrane component pressure difference change rate；
5) EDTA alkali cleanings judge：If P1>10%, then increase alkaline pH adjusting agent and make pH to 11.5-12.0, is reconfigured 1.0-
1.5% EDTA repeats step 4)；If P1<=10%, then enter next step；
6) emptying is dried：All valves of system are closed before emptying is dried, and open the cleaning water tank of cleaning water tank (QS1)
It is vented valve (QS2) and empties water tank, open pressure vessel water inlet breather pipe valve (M3), pressure vessel concentrated water is vented tube valve
(M4), water in film is emptied, 10h is stood；
7) foam alkali cleaning：All valves of system are closed before foam alkali cleaning, and cleaning water tank (QS1) injects ejected wash water extremely
40-50% water levels, configure 0.15-0.2% dodecyl sulphonic acid sodiums, and configuration alkaline pH adjusting agent adjusts pH to 11.5-12.0, control
Ejected wash water water temperature processed is at 32-35 DEG C；It is dense that cleaning water tank outlet valve (X1), concentrated water pipe early gate (Y7), pressure vessel are opened successively
Aqueduct valve (M2), pressure vessel water inlet valve (M1), water inlet pipe late gate (X8), water tank reflux tube valve (Z4), are opened
Cleaning pump (X2)；30min is recycled with 120%-150%Q flows, cleaning pump (X2), water inlet pipe late gate (X8) is closed, is beaten after 5min
Cleaning pump (X2), water inlet pipe late gate (X8) are opened, 30min is recycled with Q flows, is moved in circles in this way, until cycle 5 is small
When, it is P2 to recycle front and back membrane component pressure difference change rate；
8) foam alkali cleaning judges：If P2>10%, then increase alkaline pH adjusting agent and make pH to 11.5-12.0, is reconfigured 1.0-
1.5% EDTA repeats step 7)；If P2<=10%, then enter next step；
9) it rinses：Same step 3)；
10) pickling：It cleans water tank (QS1) and injects ejected wash water to highest liquid level, configuration acidic ph modifier adjusts pH to 2.0-
2.5, control ejected wash water water temperature is recycled 2 hours at 32-35 DEG C with Q flows, and it is P3 to recycle front and back membrane component pressure difference change rate；
11) pickling judges：If P3>10%, then increase acidic ph modifier and make pH to 2.0-2.5, repeats step 10)；If P3<=
10%, then enter next step；
12) it rinses：Same step 3)；
13) it is tested after washing：All valves of system are closed before being tested after washing, and test water tank (CS1) injects test water extremely
Peak level, successively open test tank outlet valve (Y1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1),
Pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve (Z3) are opened test pump (Y2), are reached
To film intake pressure, the sampling tube valve (M5) on probe tube is opened, exhaust samples, the flow of inlet water of each branch film of test record,
Concentrated water flow, production water flow, water inlet conductance, production water power lead, water temperature, intake pressure, produce water pressure, concentrated water pressure.
Preferably, membrane component pressure difference change rate before and after the cycle (recycles membrane component after preceding membrane component pressure difference-cycle
Pressure difference) the preceding membrane component pressure difference of/cycle；The membrane component pressure difference is pressure gauge (X5) reading-return duct pressure after water inlet pipe filter
Power table (Z1) is read.
Preferably, the circular flow Q, i.e. reverse-osmosis membrane element design the 100-150% of flow of inlet water；The film water inlet
Pressure, i.e. reverse-osmosis membrane element design the 100-130% of intake pressure.
Known to people for the industry, reverse-osmosis membrane element designs flow of inlet water and design intake pressure, can refer to film
The product description of product；Test pump is high-pressure pump, pressure when according to reverse osmosis membrane normal operation and flow selection, according to film
Model type selecting, and consider pressure vessel quantity；Cleaning pump according to flow when reverse osmosis membrane normal operation 1.2-1.5 times, reverse osmosis
The 20-40% selections of intake pressure, according to membranous type type selecting, and consider pressure vessel quantity when permeable membrane normal operation；Test water one
As for ultrafiltration produce water or turbidity<0.2NTU, pH are in 7.0-8.0, TDS under the normal range (NR) that respective model film is resistant to
Other water sources, and require chlorine residue<0.1mg/L；Ejected wash water is generally reverse osmosis produced water or turbidity<0.2NTU, pH 6.0-7.5,
TDS<Other water sources of 100mg/L；Non-oxidative antimicrobial generally uses DBNPA, isothiazolinone etc.；Alkaline pH adjusting agent, one
As use sodium hydroxide, configuration concentration is generally 0.1%, can be increased or reduced according to practical adjustments sensitivity requirement；Acid pH
Conditioning agent, it is 0.1% generally to use hydrochloric acid or citric acid, hydrochloric acid configuration concentration, and citric acid configuration concentration is 1%-2%, can be according to reality
Border adjusts sensitivity requirement, increases or reduces；Diversified forms, including common gate valve etc. both can be used in related valve, can also be used
Electrically operated valve or operated pneumatic valve realize automation cleaning test in conjunction with PLC.
Known to people for the industry, jet aerator uses venturi principle, high-velocity flow to pass through jet aerator
Negative pressure is will produce, snorkel to negative pressure is connected at this time and goes out meeting intake-gas, gas and the high-velocity flow of suction can generate aeration effect
Fruit, aeration intensity is related to water velocity, is generated for strengthening foam, and the air of sucking and the volume ratio of water are 1:1-2:1.
Known to people for the industry, flow recovery is standardized, i.e.,（Standard when standardizing flow-test when manufacture
Change flow）Flow is standardized when/manufacture, the calculating for standardizing flow can refer to relevant speciality books or document.
Known to people for the industry, the instrument on water inlet manifold (X) and concentrated water manifold (Y) and valve, basis respectively
Pressure, the flow type selecting of cleaning pump (X2) and test pump (Y2).
Known to people for the industry, pressure vessel quantity>1,2-8 are traditionally arranged to be, can be carried out at the same time multigroup anti-
Membrane cleaning is permeated, cleaning efficiency is improved, test pump and cleaning pump discharge type selecting should consider pressure vessel quantity simultaneously.
The method have the benefit that：
1）Offline cleaning performance is good, and reverse osmosis standardization flow recovery can be more than 90%；
2）Optimize cleaning agent and cleaning method, foam is generated by the jet aerator tested in water tank, air water strengthens cleaning；
By to drying after Membrane cleaning, clean again, changing the contact conditions of film surface and pollutant, realizing and strengthen cleaning；
3）According to membrane component features of pollution, specific aim is cleaned, and increases the time of pickling or alkali cleaning, strengthens cleaning performance；
4）Device integration testing and cleaning function；
5）Offline cleaning restores membrane flux, effectively reduces the operation energy consumption of counter-infiltration system, extends the service life of counter-infiltration system；
6）Method has wide applicability, is generally applicable to all kinds of reverse osmosis membrane cleanings.
Description of the drawings
Fig. 1 is efficient reverse osmosis offline cleaning test device schematic diagram；
Fig. 2 is efficient reverse osmosis offline cleaning test device pressure vessel detail drawing.
In figure：C is production supply mains, and C1 is production water main pipe pressure table, and C2 is production water main conduit flow meter, and CS1 is test water tank,
CS2 is that test water tank is vented valve, and L1 is the first connecting tube, and M1 is pressure vessel water inlet valve, and M2 is pressure vessel concentrated water
Tube valve, M3 are pressure vessel water inlet breather pipe valve, and M4 is that pressure vessel concentrated water is vented tube valve, and M5 is sampling tube valve,
QS1 is cleaning water tank, and QS2 is cleaning water tank blow valve door, and QS3 is jet aerator, and TQ is vent stack, and TQ1 holds for pressure
Device water inlet snorkel, TQ2 are pressure vessel concentrated water blow-down pipe, and X is water inlet manifold, and X1 is cleaning water tank outlet valve, and X2 is to clean
Pump, X3 be water inlet pipe filter before pressure gauge, X4 be water inlet pipe filter, X5 be water inlet pipe filter after pressure gauge, X6 be into
Water pipe check-valves, X7 are water inlet pipe early gate, and X8 is water inlet pipe late gate, and Y is concentrated water manifold, and Y1 is test tank outlet valve,
Y2 is that test pumps, and Y3 is pressure gauge before dense water pipe filter, and Y4 is dense water pipe filter, and Y5 is pressure after dense water pipe filter
Table, Y6 are concentrated water pipe check-valves, and Y7 is concentrated water pipe early gate, and Y8 is concentrated water pipe late gate, and YL is pressure vessel, and Z returns for water tank
Flow tube, Z1 are reflux hook gauge, and Z2 is return line flow gauge, and Z3 is return branch tube valve, and Z4 is water tank reflux tube valve.
Specific implementation mode
In order to make the purpose of the present invention, technical solution and advantage become apparent from, it is clear, below with reference to specific embodiment,
The present invention is described in more detail.
The present invention provides a kind of efficiently reverse osmosis offline cleaning test device and method, can solve reverse osmosis offline cleaning effect
The problems such as fruit is bad, cleaning is not strong to pollutant specific aim is suitable for the offline cleaning and test of reverse osmosis membrane.
Reverse osmosis membrane pollution type includes microbial contamination, organic pollution, inorganic matter pollution etc., is intake according to each system
Water quality and operating condition are different, and contamination class that reverse osmosis membrane is subject to, pollution level are different, for the high-efficiency washing of reverse osmosis membrane
Cause difficulty.In traditional sterilization, alkali cleaning, acid cleaning process, mostly based on medicament, such as sterilization uses non-oxidative antimicrobial,
Alkali cleaning is with EDTA, dodecyl sulphonic acid sodium etc., and pickling is based on hydrochloric acid, citric acid etc..Although medicament is to reverse osmosis pollution
Essence that is most important, but polluting is cleaned, is the attachment accumulation of solid phase-solid phase of pollutant and film surface, it is also contemplated that
Solid-solid interface feature, and use specific aim measure.It is found in practical offline cleaning, in alkaline cleaning procedure, using foam alkali cleaning
Effect is better than traditional alkali cleaning, carries a large amount of bubbles and water secretly in foam, in the pressure limit that film can be born, has substantially carried out gas
Water joint is rinsed, and has preferable effect for the separation of solid-solid.On the one hand foam alkaline cleaning procedure cleans cistern water level and only has
On the other hand 40%-50% increases jet aerator, by concentrate recirculation and vent stack, strengthen a large amount of foams and generate, improve clear
Effect is washed, is fallen from high point also by when concentrate recirculation, strengthens disturbance and generates appropriate foam.Meanwhile alkali cleaning and foam alkali cleaning
Cheng Zhong is all made of the pattern of high flow capacity cycle, termination of pumping, low discharge cycle, both by small-large flow cyclic hardening solid-solid separation,
Termination of pumping process simultaneously strengthens solid-solid separation using the vibrations that pump-stopping water hammer generates, good result is obtained in practice.According to film
The pollution type of element and the pH variations in alkali cleaning, acid cleaning process, judge the time of its cleaning, it is dirty targetedly to carry out film
The cleaning and recovery of dye, further improve cleaning efficiency.When device designs, fully consider that membrane component dries-wet processes
In, there is desorption to pollutant, therefore design pressure container is to tilt to install, convenient for emptying.
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..A kind of efficient reverse osmosis of the present invention
Offline cleaning test device thoroughly, in conjunction with shown in Fig. 1 to Fig. 2, including cleaning water tank (QS1), cleaning pump (X2), water inlet pipe filter
(X4), test water tank (CS1), test pump (Y2), dense water pipe filter (Y4), film frame, pressure vessel (YL) and connect above-mentioned set
Standby pipeline, valve and instrument.
The pipeline includes that the water inlet pipe of each pressure vessel (YL), water producing pipe, concentrated water pipe, pressure vessel water inlet are logical
Tracheae (TQ1), pressure vessel concentrated water blow-down pipe (TQ2), probe tube, water inlet manifold (X), production supply mains (C), concentrated water manifold (Y),
Water tank return duct (Z), the first connecting tube (L1), vent stack (TQ), return branch pipe clean water tank blow-down pipe, test water tank
Blow-down pipe.
It is installed in parallel multiple pressure vessels (YL) on the film frame, a membrane element is installed in each pressure vessel (YL)
Part；The water inlet pipe of each pressure vessel (YL), water producing pipe, concentrated water pipe, pressure vessel water inlet snorkel (TQ1), pressure are held
Device concentrated water blow-down pipe (TQ2), probe tube are set up in parallel and are respectively equipped with valve, the water inlet pipe of each pressure vessel (YL),
Water producing pipe, concentrated water pipe enter water inlet manifold (X), production supply mains (C), concentrated water manifold (Y) after summarizing respectively；Water inlet manifold (X) with
Concentrated water manifold (Y) imports water tank return duct (Z) and passes back into cleaning water tank (QS1)；Water inlet pipe on the pressure vessel (YL) is set
There is pressure vessel water inlet valve (M1), pressure is equipped between pressure vessel water inlet valve (M1) and pressure vessel (YL) and is held
Device water inlet snorkel (TQ1), pressure vessel intake snorkel (TQ1) equipped with pressure vessel water inlet breather pipe valve (M3)；It is described
Concentrated water pipe on pressure vessel (YL) is equipped with pressure vessel concentrated water tube valve (M2), in pressure vessel concentrated water tube valve (M2) and pressure
Pressure vessel concentrated water blow-down pipe (TQ2) is equipped between force container (YL), pressure vessel concentrated water blow-down pipe (TQ2) is equipped with pressure vessel
Concentrated water is vented tube valve (M4)；Two end side surface of pressure vessel (YL), one end are communicated with water producing pipe, one end and probe tube phase
Logical, probe tube is equipped with sampling tube valve (M5)；The water inlet pipe and concentrated water pipe of the pressure vessel (YL) are diagonally arranged, in pressure
The cylindrical side of container (YL) is communicated with pressure vessel (YL)；The pressure vessel (YL) tilts installation, with horizontal direction angle
It it is 30-60 °, pressure vessel intakes snorkel (TQ1) upper, and pressure vessel concentrated water blow-down pipe (TQ2) is under.
Cleaning water tank (QS1) side bottom is communicated with water inlet manifold (X), from cleaning water tank (QS1) to water inlet manifold
(X) direction sets gradually pressure gauge (X3), water inlet pipe before cleaning water tank outlet valve (X1), cleaning pump (X2), water inlet pipe filter
Pressure gauge (X5), water inlet pipe check-valves (X6), water inlet pipe early gate (X7), water inlet pipe after filter (X4), water inlet pipe filter
Late gate (X8) imports water tank return duct (Z)；Water inlet manifold (X) is in water inlet pipe early gate (X7) and water inlet pipe late gate (X8)
Between, it is communicated respectively with the water inlet pipe of each pressure vessel (YL).
Test water tank (CS1) side bottom is communicated with concentrated water manifold (Y), from test water tank (CS1) to concentrated water manifold
(Y) direction sets gradually pressure gauge (Y3), concentrated water pipe before test tank outlet valve (Y1), test pump (Y2), dense water pipe filter
Pressure gauge (Y5), concentrated water pipe check-valves (Y6), concentrated water pipe early gate (Y7), concentrated water pipe after filter (Y4), dense water pipe filter
Late gate (Y8) imports water tank return duct (Z)；Concentrated water manifold (Y) is in concentrated water pipe early gate (Y7) and concentrated water pipe late gate (Y8)
Between, it is communicated respectively with the concentrated water pipe of each pressure vessel (YL).
After the water inlet manifold (X) and concentrated water manifold (Y) import water tank return duct (Z), through the hook gauge (Z1) that reflux,
Return line flow gauge (Z2) is back to cleaning water tank (QS1).
After the water producing pipe of each pressure vessel (YL) summarizes production supply mains (C), by producing water main pipe pressure table
(C1), production water main conduit flow counts (C2) and is back to cleaning water tank (QS1).
It is communicated by the first connecting tube (L1) between the water inlet manifold (X) and concentrated water manifold (Y)；First connecting tube (L1)
One end is communicated with water inlet manifold (X) between water inlet pipe check-valves (X6) and water inlet pipe early gate (X7), the first connecting tube (L1)
The other end is communicated with concentrated water manifold (Y) between concentrated water pipe check-valves (Y6) and concentrated water pipe early gate (Y7).
Cleaning water tank (QS1) side bottom is equipped with cleaning water tank blow-down pipe, and cleaning water tank blow-down pipe is equipped with cleaning
Water tank is vented valve (QS2)；Cleaning water tank (QS1) side bottom is communicated with water inlet manifold (X), the center water inlet manifold (X)
It is the 1/4-1/5 for cleaning water tank (QS1) peak level with cleaning water tank (QS1) distance from bottom；Cleaning water tank (QS1) bottom
Equipped with jet aerator (QS3), jet aerator (QS3) one end connecting tube and water tank return duct (Z) are flowed back pipe valve by water tank
Door (Z4) communicates, and other end connecting tube is communicated with vent stack (TQ)；The other end of the vent stack (TQ) is communicated with air；
Test water tank (CS1) side bottom is equipped with test water tank blow-down pipe, and test water tank blow-down pipe is equipped with test water tank emptying
Valve (CS2).
Water tank return duct (Z) is equipped with return branch pipe before water tank reflux tube valve (Z4), and return branch pipe is equipped with back
Flow branching tube valve (Z3), return branch pipe communicate more than high water tank with air, and return branch pipe nozzle vertically downward, returns
Flow liquid can flow automatically from return branch pipe enters cleaning water tank (QS1).
The flow direction of water includes following several modes in system：
1）Test process, by test water tank, the Y1-Y6 through Y pipes, L1, the X7 of X-tube, pressure vessel, Y8, Z that concentrated water passes through Y pipes
The Z3 of pipe is discharged into cleaning water tank, and production water is discharged into cleaning water tank by C pipes；
2）Cleaning process, EDTA alkali cleanings, flow are referred to as just washed by the M1 to M2 of pressure vessel, flow self-cleaning water tank, through X-tube
X1-X7, the Z3 of pressure vessel, the Y8 of Y pipes, Z pipes is discharged into cleaning water tank；
3）Cleaning process, foam alkali cleaning, flow is by the M2 to M1 of pressure vessel, referred to as backwash, flow self-cleaning water tank, through X-tube
X1-X6, the Z4 of L1, the Y7 of Y pipes, pressure vessel, the X8 of X-tube, Z pipes is discharged into cleaning water tank；
4）Pressure vessel evacuation procedure, emptying are dried, and all valves are closed, and open M3 and M4, and the water in pressure vessel is flowed by M4
Go out, M3 is communicated with air, prevents formation negative pressure water in pressure vessel from not flowing out.
Embodiment 1：
Efficiently reverse osmosis offline cleaning test method a kind of to the present invention is done specifically, and this method depends on above equipment, cleaning
Reverse osmosis membrane, for the new film of the type film at pressure 15.5bar, standardization membrane flux at 25 DEG C is 1.79m3/ h, single branch film
37m2, include the following steps：
1) preceding test is washed：All valves of system are closed before test before washing, and test water tank (CS1) injects test water to most
High water level opens test tank outlet valve (Y1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1), pressure successively
Force container concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve (Z3) are opened test pump (Y2), are reached
Film intake pressure opens the sampling tube valve (M5) on probe tube, and exhaust, sampling are the flow of inlet water of each branch film of test record, dense
Water flow, production water flow, water inlet conductance, production water power lead, water temperature, intake pressure, produce water pressure, concentrated water pressure；
2) it sterilizes：All valves of system are closed before sterilization, cleaning water tank (QS1) injection ejected wash water to peak level,
Configure the non-oxidative antimicrobial of 400mg/L；Cleaning water tank outlet valve (X1), water inlet pipe early gate (X7), pressure is opened successively to hold
Device water inlet valve (M1), pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve (Z3),
Cleaning pump (X2) is opened, circular flow Q is recycled 1 hour；Open the cleaning water tank blow valve door (QS2) of cleaning water tank (QS1)
Water tank empties；
3) it rinses：All valves of system are closed before rinsing, and open the cleaning water tank blow valve door of cleaning water tank (QS1)
(QS2) water tank is emptied, after clear water rinses, closes cleaning water tank blow valve door (QS2), injection ejected wash water to highest liquid level；Successively
Cleaning water tank outlet valve (X1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1), pressure vessel concentrated water is opened to put
Blank pipe valve (M4) opens cleaning pump (X2), with 150%Q flow flush, 60min is rinsed, until dense on pressure vessel (YL)
The difference of pH and cleaning water tank (QS1) interior pH at water pipe<0.5, emptying cleaning water tank (QS1)；
4) EDTA alkali cleanings：All valves of system are closed before EDTA alkali cleanings, and cleaning water tank (QS1) injects ejected wash water to most
High water level, configuration 1.5%EDTA-4Na, configuration 0.05% dodecyl sulphonic acid sodium, configuration alkaline pH adjusting agent adjust pH to
11.5-12.0 controlling ejected wash water water temperature at 32-35 DEG C；Cleaning water tank outlet valve (X1), water inlet pipe early gate are opened successively
(X7), pressure vessel water inlet valve (M1), pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch
Tube valve (Z3) opens cleaning pump (X2), recycles 30min with 150%Q flows, closes cleaning pump (X2), concentrated water pipe late gate
(Y8), cleaning pump (X2), concentrated water pipe late gate (Y8) are opened after 5min, and 30min is recycled with Q flows, is moved in circles in this way,
Until recycling 5 hours, it is P1=15% to recycle front and back membrane component pressure difference change rate；
5) EDTA alkali cleanings judge：P1>10%, increase alkaline pH adjusting agent and make pH to 11.5-12.0, is reconfigured 1.5% EDTA,
Repeat step 4), after being repeated once, P1=7%<10%, into next step；
6) emptying is dried：All valves of system are closed before emptying is dried, and open the cleaning water tank of cleaning water tank (QS1)
It is vented valve (QS2) and empties water tank, open pressure vessel water inlet breather pipe valve (M3), pressure vessel concentrated water is vented tube valve
(M4), water in film is emptied, 10h is stood；
7) foam alkali cleaning：All valves of system are closed before foam alkali cleaning, and cleaning water tank (QS1) injects ejected wash water extremely
40% water level, configures 0.15% dodecyl sulphonic acid sodium, and configuration alkaline pH adjusting agent adjusts pH to 11.5-12.0, control cleaning
Water water temperature is at 32-35 DEG C；Cleaning water tank outlet valve (X1), concentrated water pipe early gate (Y7), pressure vessel concentrated water pipe valve are opened successively
Door (M2), pressure vessel water inlet valve (M1), water inlet pipe late gate (X8), water tank reflux tube valve (Z4), open cleaning pump
(X2)；30min is recycled with 150%Q flows, cleaning pump (X2), water inlet pipe late gate (X8) is closed, cleaning pump is opened after 5min
(X2), water inlet pipe late gate (X8) recycles 30min with Q flows, moves in circles in this way, until recycling 5 hours, before cycle
Membrane component pressure difference change rate is P2=8% afterwards；
8) foam alkali cleaning judges：P2<10%, into next step；
9) it rinses：Same step 3)；
10) pickling：It cleans water tank (QS1) and injects ejected wash water to highest liquid level, configuration acidic ph modifier adjusts pH to 2.0-
2.5, control ejected wash water water temperature is recycled 2 hours at 32-35 DEG C with Q flows, and it is P3=8% to recycle front and back membrane component pressure difference change rate；
11) pickling judges：P3<=10%, into next step；
12) it rinses：Same step 3)；
13) it is tested after washing：All valves of system are closed before being tested after washing, and test water tank (CS1) injects test water extremely
Peak level, successively open test tank outlet valve (Y1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1),
Pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve (Z3) are opened test pump (Y2), are reached
To film intake pressure, the sampling tube valve (M5) on probe tube is opened, exhaust samples, the flow of inlet water of each branch film of test record,
Concentrated water flow, production water flow, water inlet conductance, production water power lead, water temperature, intake pressure, produce water pressure, concentrated water pressure.
Embodiment 2：
In addition to step 6) to step 8), remaining with embodiment 1, i.e., the present embodiment without emptying dry with foam alkaline cleaning procedure,
Recovery rate only 76.4% is standardized after cleaning, 94.4% compared with embodiment 1 declines to a great extent, it is seen that emptying is dried and foam alkali cleaning
Journey has a major impact cleaning recovery effects.
Embodiment 3：
In addition to step 7) to step 8), remaining is with embodiment 1, i.e., the present embodiment is without foam alkaline cleaning procedure, standard after cleaning
Change recovery rate only 85.3%, 94.4% compared with embodiment 1 declines to a great extent, and 76.4% than embodiment 2 slightly improves, it is seen that foam
Alkaline cleaning procedure has a major impact cleaning recovery effects.
| Classification | Situation | Pf | △P | Cf | Y | T | Cp | Q | Pp | R |
| Intake pressure | Pressure drop | Water inlet TDS | The rate of recovery | Temperature | Produce water TDS | Actual flow | Produce water pressure | Standardize flow recovery | ||
| bar | bar | mg/L | ℃ | mg/L | m3/h | bar | ||||
| Normalization condition | Initially | 15.5 | 0.2 | 2000 | 0.15 | 25.0 | 37.2 | 1.79 | 0.2 | 100% |
| Embodiment 1 | Before cleaning | 11.0 | 0.8 | 2100 | 0.25 | 29.8 | 39.5 | 0.52 | 0.0 | 38.9% |
| Embodiment 1 | After cleaning | 11.0 | 0.3 | 2100 | 0.26 | 29.9 | 32.0 | 1.30 | 0.0 | 94.4% |
| Embodiment 2 | Before cleaning | 11.0 | 0.3 | 2090 | 0.26 | 28.9 | 39.0 | 0.54 | 0.0 | 40.3% |
| Embodiment 2 | After cleaning | 11.0 | 0.3 | 2090 | 0.26 | 29.8 | 36.0 | 1.05 | 0.0 | 76.4% |
| Embodiment 3 | Before cleaning | 11.0 | 0.3 | 2060 | 0.24 | 30.0 | 37.0 | 0.51 | 0.0 | 36.7% |
| Embodiment 3 | After cleaning | 11.0 | 0.3 | 2060 | 0.25 | 29.9 | 38.0 | 1.18 | 0.0 | 85.3% |
Although the terms such as water tank, water inlet pipe, concentrated water pipe are tested in more having used herein, use is not precluded
The possibility of other terms, the simple replacement that those skilled in the art under the inspiration of the present invention do these terms, should all
Within protection scope of the present invention.It takes or uses for reference prior art and can be realized in the part that do not addressed in aforesaid way.More than
Described is only the preferred embodiment of the present invention, is not intended to restrict the invention, it is noted that for the common of the art
For technical staff, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvement
Protection scope of the present invention is also should be regarded as with retouching.
Claims (8)
1. it is a kind of efficiently reverse osmosis offline cleaning test device, which is characterized in that including cleaning water tank (QS1), cleaning pump (X2),
Water inlet pipe filter (X4), test water tank (CS1), test pump (Y2), dense water pipe filter (Y4), film frame, pressure vessel (YL),
Connect pipeline, valve and the instrument of above equipment；
It is installed in parallel multiple pressure vessels (YL) on the film frame, a membrane component is installed in each pressure vessel (YL)；
Water inlet pipe, water producing pipe, concentrated water pipe, pressure vessel water inlet snorkel (TQ1), the pressure vessel of each pressure vessel (YL) are dense
Water blow-down pipe (TQ2), probe tube are set up in parallel and are respectively equipped with valve, water inlet pipe, the production water of each pressure vessel (YL)
Pipe, concentrated water pipe enter water inlet manifold (X), production supply mains (C), concentrated water manifold (Y) after summarizing respectively；Water inlet manifold (X) and concentrated water
Manifold (Y) imports water tank return duct (Z) and passes back into cleaning water tank (QS1)；
Cleaning water tank (QS1) side bottom is communicated with water inlet manifold (X), the side from cleaning water tank (QS1) to water inlet manifold (X)
To setting gradually cleaning water tank outlet valve (X1), cleaning pump (X2), pressure gauge (X3), water inlet pipe filter before water inlet pipe filter
(X4), pressure gauge (X5), water inlet pipe check-valves (X6), water inlet pipe early gate (X7), water inlet pipe late gate after water inlet pipe filter
(X8), water tank return duct (Z) is imported；Water inlet manifold (X) divides between water inlet pipe early gate (X7) and water inlet pipe late gate (X8)
It is not communicated with the water inlet pipe of each pressure vessel (YL)；
Test water tank (CS1) side bottom is communicated with concentrated water manifold (Y), the side from test water tank (CS1) to concentrated water manifold (Y)
Pressure gauge (Y3), dense water pipe filter to before setting gradually test tank outlet valve (Y1), test pump (Y2), dense water pipe filter
(Y4), pressure gauge (Y5), concentrated water pipe check-valves (Y6) after dense water pipe filter, concentrated water pipe early gate (Y7), concentrated water pipe late gate
(Y8), water tank return duct (Z) is imported；Concentrated water manifold (Y) divides between concentrated water pipe early gate (Y7) and concentrated water pipe late gate (Y8)
It is not communicated with the concentrated water pipe of each pressure vessel (YL)；
After the water inlet manifold (X) imports water tank return duct (Z) with concentrated water manifold (Y), by the hook gauge (Z1) that flows back, reflux
Flowmeter for pipe (Z2) is back to cleaning water tank (QS1)；
After the water producing pipe of each pressure vessel (YL) summarizes production supply mains (C), by producing water main pipe pressure table (C1), production
Water main conduit flow counts (C2) and is back to cleaning water tank (QS1).
2. a kind of efficiently reverse osmosis offline cleaning test device according to claim 1, which is characterized in that the water inlet is total
It is communicated by the first connecting tube (L1) between pipe (X) and concentrated water manifold (Y)；First connecting tube one end (L1) and water inlet manifold (X)
It is communicated between water inlet pipe check-valves (X6) and water inlet pipe early gate (X7), the first connecting tube (L1) other end and concentrated water manifold
(Y) it is communicated between concentrated water pipe check-valves (Y6) and concentrated water pipe early gate (Y7).
3. a kind of efficiently reverse osmosis offline cleaning test device according to claim 1, which is characterized in that the pressure is held
Water inlet pipe on device (YL) is equipped with pressure vessel water inlet valve (M1), in pressure vessel water inlet valve (M1) and pressure vessel
(YL) pressure vessel water inlet snorkel (TQ1) is equipped between, it is logical that pressure vessel water inlet snorkel (TQ1) is equipped with pressure vessel water inlet
Tracheae valve (M3)；Concentrated water pipe on the pressure vessel (YL) is equipped with pressure vessel concentrated water tube valve (M2), in pressure vessel
Pressure vessel concentrated water blow-down pipe (TQ2), the emptying of pressure vessel concentrated water are equipped between concentrated water tube valve (M2) and pressure vessel (YL)
It manages (TQ2) and is equipped with pressure vessel concentrated water emptying tube valve (M4)；Two end side surface of pressure vessel (YL), one end and water producing pipe phase
Logical, one end is communicated with probe tube, and probe tube is equipped with sampling tube valve (M5)；The water inlet pipe and concentrated water of the pressure vessel (YL)
The diagonal setting of pipe, communicates in the cylindrical side of pressure vessel (YL) with pressure vessel (YL)；The pressure vessel (YL) tilts peace
Dress, is 30-60 ° with horizontal direction angle, and pressure vessel intakes snorkel (TQ1) in upper, pressure vessel concentrated water blow-down pipe (TQ2)
Under.
4. a kind of efficiently reverse osmosis offline cleaning test device according to claim 1, which is characterized in that the ejected wash water
Case (QS1) side bottom is equipped with cleaning water tank blow-down pipe, and cleaning water tank blow-down pipe is equipped with cleaning water tank blow valve door (QS2)；
Cleaning water tank (QS1) side bottom is communicated with water inlet manifold (X), the water inlet manifold center (X) and cleaning bottom water tank (QS1)
Distance is the 1/4-1/5 of cleaning water tank (QS1) peak level；Cleaning water tank (QS1) bottom is equipped with jet aerator
(QS3), jet aerator (QS3) one end connecting tube is communicated with water tank return duct (Z) by water tank reflux tube valve (Z4), another
End connecting tube is communicated with vent stack (TQ)；The other end of the vent stack (TQ) is communicated with air；The test water tank
(CS1) side bottom is equipped with test water tank blow-down pipe, and test water tank blow-down pipe is equipped with test water tank emptying valve (CS2).
5. a kind of efficiently reverse osmosis offline cleaning test device according to claim 1, which is characterized in that the water tank returns
Flow tube (Z) is equipped with return branch pipe before water tank reflux tube valve (Z4), and return branch pipe is equipped with return branch tube valve
(Z3), return branch pipe communicates more than high water tank with air, and vertically downward, phegma can be from reflux for return branch pipe nozzle
Branched pipe gravity flow enters cleaning water tank (QS1).
6. a kind of efficiently reverse osmosis offline cleaning test method, using the equipment as described in claim 1-5 any claims,
Its feature includes the following steps：
1) preceding test is washed：All valves of system are closed before test before washing, and test water tank (CS1) injects test water to most
High water level opens test tank outlet valve (Y1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1), pressure successively
Force container concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve (Z3) are opened test pump (Y2), are reached
Film intake pressure opens the sampling tube valve (M5) on probe tube, and exhaust, sampling are the flow of inlet water of each branch film of test record, dense
Water flow, production water flow, water inlet conductance, production water power lead, water temperature, intake pressure, produce water pressure, concentrated water pressure；
2) it sterilizes：All valves of system are closed before sterilization, cleaning water tank (QS1) injection ejected wash water to peak level,
Configure the non-oxidative antimicrobial of 300-500mg/L；Cleaning water tank outlet valve (X1), water inlet pipe early gate (X7), pressure are opened successively
Force container water inlet valve (M1), pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve
(Z3), cleaning pump (X2) is opened, circular flow Q is recycled 1 hour；Open the cleaning water tank blow valve door of cleaning water tank (QS1)
(QS2) water tank empties；
3) it rinses：All valves of system are closed before rinsing, and open the cleaning water tank blow valve door of cleaning water tank (QS1)
(QS2) water tank is emptied, after clear water rinses, closes cleaning water tank blow valve door (QS2), injection ejected wash water to highest liquid level；Successively
Cleaning water tank outlet valve (X1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1), pressure vessel concentrated water is opened to put
Blank pipe valve (M4) opens cleaning pump (X2), with 120-150%Q flow flush, 30min-60min is rinsed, until pressure vessel
(YL) difference of pH and cleaning water tank (QS1) interior pH at the concentrated water pipe on<0.5, emptying cleaning water tank (QS1)；；
4) EDTA alkali cleanings：All valves of system are closed before EDTA alkali cleanings, and cleaning water tank (QS1) injects ejected wash water to most
High water level, configuration 1-2%EDTA-4Na, configuration 0.05-0.1% dodecyl sulphonic acid sodiums, configuration alkaline pH adjusting agent adjust pH
To 11.5-12.0, control ejected wash water water temperature is at 32-35 DEG C；Cleaning water tank outlet valve (X1), water inlet pipe early gate are opened successively
(X7), pressure vessel water inlet valve (M1), pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch
Tube valve (Z3) opens cleaning pump (X2), recycles 30min with 120%-150%Q flows, closes valve after cleaning pump (X2), concentrated water pipe
Door (Y8) opens cleaning pump (X2), concentrated water pipe late gate (Y8) after 5min, recycles 30min with Q flows, recycles in this way past
Multiple, until recycling 5 hours, it is P1 to recycle front and back membrane component pressure difference change rate；
5) EDTA alkali cleanings judge：If P1>10%, then increase alkaline pH adjusting agent and make pH to 11.5-12.0, is reconfigured 1.0-
1.5% EDTA repeats step 4)；If P1<=10%, then enter next step；
6) emptying is dried：All valves of system are closed before emptying is dried, and open the cleaning water tank of cleaning water tank (QS1)
It is vented valve (QS2) and empties water tank, open pressure vessel water inlet breather pipe valve (M3), pressure vessel concentrated water is vented tube valve
(M4), water in film is emptied, 10h is stood；
7) foam alkali cleaning：All valves of system are closed before foam alkali cleaning, and cleaning water tank (QS1) injects ejected wash water extremely
40-50% water levels, configure 0.15-0.2% dodecyl sulphonic acid sodiums, and configuration alkaline pH adjusting agent adjusts pH to 11.5-12.0, control
Ejected wash water water temperature processed is at 32-35 DEG C；It is dense that cleaning water tank outlet valve (X1), concentrated water pipe early gate (Y7), pressure vessel are opened successively
Aqueduct valve (M2), pressure vessel water inlet valve (M1), water inlet pipe late gate (X8), water tank reflux tube valve (Z4), are opened
Cleaning pump (X2)；30min is recycled with 120%-150%Q flows, cleaning pump (X2), water inlet pipe late gate (X8) is closed, is beaten after 5min
Cleaning pump (X2), water inlet pipe late gate (X8) are opened, 30min is recycled with Q flows, is moved in circles in this way, until cycle 5 is small
When, it is P2 to recycle front and back membrane component pressure difference change rate；
8) foam alkali cleaning judges：If P2>10%, then increase alkaline pH adjusting agent and make pH to 11.5-12.0, is reconfigured 1.0-
1.5% EDTA repeats step 7)；If P2<=10%, then enter next step；
9) it rinses：Same step 3)；
10) pickling：It cleans water tank (QS1) and injects ejected wash water to highest liquid level, configuration acidic ph modifier adjusts pH to 2.0-
2.5, control ejected wash water water temperature is recycled 2 hours at 32-35 DEG C with Q flows, and it is P3 to recycle front and back membrane component pressure difference change rate；
11) pickling judges：If P3>10%, then increase acidic ph modifier and make pH to 2.0-2.5, repeats step 10)；If P3<=
10%, then enter next step；
12) it rinses：Same step 3)；
13) it is tested after washing：All valves of system are closed before being tested after washing, and test water tank (CS1) injects test water extremely
Peak level, successively open test tank outlet valve (Y1), water inlet pipe early gate (X7), pressure vessel water inlet valve (M1),
Pressure vessel concentrated water tube valve (M2), concentrated water pipe late gate (Y8), return branch tube valve (Z3) are opened test pump (Y2), are reached
To film intake pressure, the sampling tube valve (M5) on probe tube is opened, exhaust samples, the flow of inlet water of each branch film of test record,
Concentrated water flow, production water flow, water inlet conductance, production water power lead, water temperature, intake pressure, produce water pressure, concentrated water pressure.
7. a kind of efficiently reverse osmosis offline cleaning test method according to claim 6, which is characterized in that before the cycle
Membrane component pressure difference change rate afterwards, i.e. membrane component pressure difference before (membrane component pressure difference after membrane component pressure difference-cycle before cycle)/cycle；Institute
It is pressure gauge (X5) reading-reflux hook gauge (Z1) reading after water inlet pipe filter to state membrane component pressure difference.
8. a kind of efficiently reverse osmosis offline cleaning test method according to claim 6, which is characterized in that the recycle stream
Measure Q, the i.e. 100-150% of reverse-osmosis membrane element design flow of inlet water；The film intake pressure, i.e. reverse-osmosis membrane element design into
The 100-130% of water pressure.
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Application publication date: 20180731 |