CN102455278A - Dynamic evaluation device and application method for reverse osmosis antiscalant - Google Patents
Dynamic evaluation device and application method for reverse osmosis antiscalant Download PDFInfo
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- CN102455278A CN102455278A CN2010105267307A CN201010526730A CN102455278A CN 102455278 A CN102455278 A CN 102455278A CN 2010105267307 A CN2010105267307 A CN 2010105267307A CN 201010526730 A CN201010526730 A CN 201010526730A CN 102455278 A CN102455278 A CN 102455278A
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Abstract
The invention discloses a dynamic evaluation device and an application method for a reverse osmosis antiscalant. The invention provides a precision filter, which is arranged on the pipeline between a concentrate aperture adjustment valve at the back of a high-pressure pump and a water inlet tank; and a transparent observing opening is arranged on the precision filter and can observe the change degree of filter materials intuitively and obtain the scaling amount and scaling rate at a given recovery rate. According to the invention, an automatic data acquisition and processing system is adopted for data processing in a constant temperature and constant pressure mode; aiming at the problems that low-solubility salt antiscalants such as CaCO3 and the like are difficult to screen and a reverse osmosis device is difficult to guide, a proper reverse osmosis antiscalant is screened out to guide the operation of the reverse osmosis device; and the dynamic evaluation device and application method can be used for research and development of the antiscalant. The dynamic evaluation device and application method for the reserves osmosis antiscalant have the advantages of simplicity and convenience, strong pertinence, high automaticity, less water amount for evaluation, shortened evaluation time and accurate and reliable evaluation result.
Description
Technical field
The present invention relates to a kind of dynamics evaluation apparatus and application process of reverse osmosis antisludging agent, relate more specifically to a kind of based on the evaluating apparatus of antisludging agent for osmosis-reverse membrane and the application in waste water advanced treatment recovery.
Background technology
Counter-infiltration (RO) is a kind of membrane separation technique, compares with traditional ion-exchange desalting technology, and simple to operate, discharge of wastewater is few, and operating cost is low, has therefore obtained developing rapidly.But through behind the reverse osmosis unit; The dense water intermediate ion of RO concentration is generally 4～5 times of water into; Most of difficulty soluble salt can surpass its saturation degree, thereby is deposited on the film surface, and the indissoluble salt (scale forming matter) of generation has oxide or the oxyhydroxide etc. of lime carbonate, calcium sulphate, calcium fluoride, calcium phosphate, barium sulphate, strontium sulfate and iron, manganese, aluminium according to influent quality; Influence the normal operation of reverse osmosis unit, cause scrapping of reverse osmosis membrane apparatus when serious.For addressing this is that, can in feed water by reverse osmosis, add the formation that antisludging agent prevented or controlled scale forming matter.
The composition of reverse osmosis antisludging agent is generally organic phosphate, the multiple copolymer of materials such as polycarboxylate or acrylic acid, acrylic ester, propene sulfonic acid class and other compound.The kind of reverse osmosis antisludging agent is a lot of both at home and abroad at present, to different scale forming matters, chooses dissimilar antisludging agents.And for the antisludging agent that is directed against with a kind of scale forming matter, for different water quality, the effect of antisludging agent also has very big-difference.The reverse osmosis antisludging agent user of service listens to the one-side suggestion of pharmaceutical supply merchant or engineering corporation mostly, but reverse osmosis antisludging agent is of a great variety, and how it being estimated becomes the difficult problem that the user of service is faced when selecting suitable antisludging agent.At present aspect the setting up of the evaluation method of reverse osmosis antisludging agent, also there is not the standard method in the industry, mostly with reference to the evaluation method of circulating water treatment medicament.How become the problem that enterprise and technician are concerned about to the specific water source good antisludging agent that filters out scale inhibition effect.Dynamic evaluation method is based on a cover reverse osmosis membrane apparatus and the evaluation of scale inhibitor method set up; Complicated hydraulics when simulating actual counter-infiltration operation; Thereby more near actual counter-infiltration running environment; Can filter out the reverse osmosis membrane antisludging agent that more corresponds to actual needs, thereby obtain researchist's generally favor.
Patent CN101000336B provides a kind of dynamic testing method of performance of reverse osmosis antisludging agent; Adopting reverse osmosis concentrated liquid all to be back to former tank circulates; Simultaneously a counter-infiltration penetrating fluid part is back to the method that former tank circulates, remainder discharges; Increase solution concentration in the former tank of counter-infiltration continuously, the water inlet on-stream pressure through the record counter-infiltration system, the pressure that flow of solution is crossed film fall, solution temperature, and parameters such as monitoring solution ion concentration, pH value of solution value, turbidity, penetrating fluid water production rate over time; Estimate the scale inhibition effect of counter-infiltration scale inhibitor special, and can obtain the limit scale inhibition ability of antisludging agent.Adopt improved partial recycle process to adopt that reverse osmosis concentrated liquid all is back to former tank, a counter-infiltration penetrating fluid part is back to former tank and circulates; Be as good as with partial recycle process; And carry out the scale inhibition effect evaluation of antisludging agent because of adopting the laboratory water distribution; The water quality characteristics that can not well reflect actual water source lacks concrete, specific aim.Quantity of parameters assistant analysis such as the pressure of crossing film through record water inlet on-stream pressure, solution falls, solution temperature, solution ion concentration, pH value of solution value, turbidity, penetrating fluid water production rate are judged; Method is loaded down with trivial details, bothersome, and the operation that is not easy to on-the-spot user of service is grasped.
Patent CN201080450Y provides a kind of multi-functional counter-infiltration operation dynamic simulation tester; Can realize the evaluation test of counter-infiltration scale inhibitor special; This device can be realized counter-infiltration operation dynamic similation simultaneously; Obtain counter-infiltration operation optimum parameters and controlling index, carry out the functions such as failure analysis of counter-infiltration system operation troubles.But this device is based on dynamic recycle to extinction; Adopt the gradient adding to be used to generate the method at the different water inlet water source of the dirty scale-forming ion simulation of target; Though the scale-inhibiting properties of antisludging agent in the time of can dynamically recording solution concentration and constantly increase, the limit scale inhibition ability of antisludging agent in the time of can not estimating out the system recoveries rate and increase.
Patent CN101256180A provides a kind of method for evaluation of antisludging performance of reverse osmosis antisludging agent, through setting up dynamic recycle to extinction system, simulation counter-infiltration running environment; Be used to generate the dirty incrustation ion solution of target to simulate different water inlet water sources to dynamic recycle to extinction system interval gradient adding; The scale-inhibiting properties of antisludging agent when the investigation solution concentration constantly increases, the parameters when the recycle to extinction system moves is also analyzed the scale-inhibiting properties that obtains antisludging agent.This method adopts the method for dynamic recycle to extinction; Launch the evaluation of antisludging agent through the simulation water distribution; In fact most of actual water source complicated component, it is representative to adopt the method that adds the different water inlet of incrustation ion simulation water source to lack, and can not accurately filter out the antisludging agent that is fit to actual source quality.
Patent CN101726564A provides a kind of universal test device of testing performance of reverse osmosis scale inhibitor, though this test unit highly versatile, device is complicated, cost is also high, and the operation that is not easy to on-the-spot user of service is grasped.
The partial recycle process that (Xue Ke etc., the dynamic evaluation method of counter-infiltration scale inhibitor special performance, chemical industry progress, 2006,25 (8), 907～912) are mentioned in the document is inappropriate for again estimates CaCO
3Deng the low solubility salt.
The subject matter that exists around reverse osmosis antisludging agent dynamic evaluation aspect at present has:
(1) partial recycle process is not suitable for evaluation CaCO
3Antisludging agent Deng the low solubility salt.Improved partial recycle process employing reverse osmosis concentrated liquid all is back to former tank, a counter-infiltration penetrating fluid part is back to former tank and circulates; Be as good as with partial recycle process; And carry out the scale inhibition effect evaluation of antisludging agent because of adopting the laboratory water distribution; The water quality characteristics that can not well reflect actual water source lacks concrete, specific aim.Quantity of parameters assistant analysis such as the pressure of crossing film through record water inlet on-stream pressure, solution falls, solution temperature, solution ion concentration, pH value of solution value, turbidity, penetrating fluid water production rate are judged; Method is loaded down with trivial details, bothersome, and the operation that is not easy to on-the-spot user of service is grasped.
(2) feedwater single pass method water requirement is big, and consumes a large amount of chemical agents, and the evaluation cycle that method wastes time and energy, needs is long.
(3) dynamically total recycle process adds the different water inlet water source of scale-forming ion simulation that is used to generate the target dirt through gradient; The scale-inhibiting properties of antisludging agent in the time of can dynamically recording solution concentration and constantly increase, but the limit scale inhibition ability of antisludging agent can not estimate out the system recoveries rate and increase the time.
(4) because the different reverse osmosis antisludging agent compositions and the difference of physicochemical characteristics find that when reality is used when system's calcium ion is too high, be easy to directly form white hard scale, the pickling of can only stopping could be removed at leisure; Can control the soft dirt of formation though raising adds dose, after antisludging agent was concentrated in various degree in counter-infiltration system, the antisludging agent of different dispersive propertys possibly produce crystallization and separate out impurity.
(5) when adopting actual waste water to estimate reverse osmosis antisludging agent; Usually the product water of pretreatment unit before negate is permeated; Because the composition of waste water differs, in the waste water that has COD content high in addition surpassed conventional counter-infiltration advance the film requirement, influence the accurate evaluation of reverse osmosis antisludging agent.
Summary of the invention
For overcoming defective of the prior art, the technical matters that the present invention will solve is: provide a kind of being suitable for to estimate to CaCO
3Deng the dynamics evaluation apparatus and the method for low solubility salt reverse osmosis antisludging agent, can filter out the good antisludging agent of scale inhibition effect fast and effectively to actual water source, and guide the operation of reverse osmosis unit.
Product technology scheme provided by the invention is:
A kind of dynamics evaluation apparatus of reverse osmosis antisludging agent; It is characterized in that: comprise inlet water tank 1, thermostat 2, water inlet degree adjustment valve 7, high-pressure pump 3, secondary filter device 6, tensimeter 10, reverse osmosis membrane test pool 4, dense water degree adjustment valve 8; Reverse osmosis produced pond 5, automatic data collection and disposal system 9.
(1) adopt thermostat that the inlet water tank housing is carried out thermostatic control, inlet water tank links to each other with the high-pressure pump inlet through the water inlet degree adjustment valve, and the water inlet degree adjustment valve is used to regulate flow of inlet water.
(2) the reverse osmosis membrane test pool is installed on export pipeline behind the high-pressure pump.Setting pressure table on the pipeline between high-pressure pump and the reverse osmosis membrane test pool.
(3) dense water degree adjustment valve links to each other with the reverse osmosis membrane test pool, and dense water degree adjustment valve is used to regulate the flow of high-pressure pump top hole pressure, concentrate.
(4) the secondary filter device is installed on the pipeline between dense water degree adjustment valve and the inlet water tank.
(5) reverse osmosis produced pond links to each other with the reverse osmosis membrane test pool.Reverse osmosis produced pond links to each other with disposal system with automatic data collection.
Preferably:
During practical implementation, reverse osmosis concentrated liquid turns back to the inlet water tank top, and the inlet water tank bottom sets out the mouth of a river.Be provided with gas-liquid separator, fair water fin in the inlet water tank,, reduce disturbance, keep the constant-pressure operation of high-pressure pump high-pressure pump to reduce the bubble that produces when reverse osmosis concentrated liquid returns inlet water tank.
During practical implementation, fill filtrate in the secondary filter device.Filtrate can be granular activated carbon, polypropylene (PP), Kynoar (PVDF), polyethersulfone (PES), polytetrafluoroethylene (PTFE), cellulose mixture (CN-CA), nylon, carbon fibre.Preferably: polypropylene (PP).Filtering accuracy can be 0.22 μ m, 0.45 μ m, 1 μ m, 3 μ m, 5 μ m, preferred 0.45 μ m.
During practical implementation, establish observation port on the secondary filter device case.The observation port material is selected transparent plastic for use; Can be polymethylmethacrylate (PMMA; Be commonly called as organic glass), PVC (PVC), polypropylene (PP), polyethylene terephthalate-1,4 cyclohexane dimethanol ester (PETG), polyethylene terephthalate (PET), preferred PMMA.
During practical implementation; The reverse osmosis membrane test pool comprises two housing sections, reverse osmosis membrane, O-ring seal or sealing gasket, fastening bolt up and down; Wherein establish diversion trench in the reverse osmosis membrane test pool lower case, the side sets out the mouth of a river, establishes water inlet in the middle of the reverse osmosis membrane test pool upper body, the side sets out the mouth of a river.Middle water inlet flows into feed water by reverse osmosis from reverse osmosis membrane test pool top, and water delivering orifice flows out reverse osmosis concentrated liquid through reverse osmosis membrane test pool upper body side.Reverse osmosis produced water is that penetrating fluid is collected through reverse osmosis membrane test pool lower case diversion trench, and water delivering orifice flows out from reverse osmosis membrane test pool lower case side.
During practical implementation, reverse osmosis membrane test pool shell material is the 316L stainless steel, and the reverse osmosis membrane that uses is commercialization counter-infiltration diaphragm, and membrane material can be aromatic polyamide, acetyl cellulose (CA).
Application process technical scheme of the present invention comprises following steps:
(1) in inlet water tank, adds the evaluation water sample, add the reverse osmosis antisludging agent concentration range at 2mg/L～5mg/L;
(2) open thermostat, the feed water by reverse osmosis temperature is controlled at a steady state value in 25 ℃～40 ℃ scopes; Open the water inlet degree adjustment valve, the dense water degree adjustment valve of standard-sized sheet is opened high-pressure pump, and this moment, the reverse osmosis concentrated liquid circulation was returned inlet water tank through the secondary filter device;
(3) treat in the inlet water tank that solution temperature is constant after, regulate dense water degree adjustment valve, make the steady state value of top hole pressure scope in 250psi～300psi behind the high-pressure pump.Reverse osmosis produced water continuous blow-down is collected through reverse osmosis produced pond, through constantly draining reverse osmosis produced water, makes that each ion concentration is improved accordingly in the circulation fluid, thereby increases the scaling tendency of incrustation ion in the solution.
(4) reverse osmosis produced pond links to each other with disposal system with automatic data collection, obtains reverse osmosis membrane permeation flux, the recovery, film permeation flux normalization coefficient (J through automatic data collection and disposal system
t/ J
0).
(5) obtain relation curve between the film permeation flux normalization coefficient and the recovery.Judge the scale-inhibiting properties of antisludging agent according to the decline degree of film permeation flux normalization coefficient in the curve.Judge the maximum recovery that antisludging agent can reach through point of inflexion on a curve.Estimate the performance of antisludging agent through the recovery that can reach.
During practical implementation, when the device operation, take constant voltage control.The steady state value of pressure control in 250psi～300psi scope, preferred 270psi～280psi.
During practical implementation, when the device operation, take thermostatic control.Inflow temperature is through thermostatic bath control.The feed water by reverse osmosis temperature is controlled at a steady state value in 25 ℃～40 ℃ scopes, preferred 30 ℃～35 ℃.
During practical implementation, adopt automatic data collection and disposal system to carry out the processing of data.Through input reverse osmosis membrane area, water inlet general assembly (TW), acquisition interval time in automatic data collection and disposal system, obtain reverse osmosis membrane permeation flux, the recovery, film permeation flux normalization coefficient (J
t/ J
0), the relation curve between film permeation flux normalization coefficient and the recovery.
Patent of the present invention has been carried out following improvement to the deficiency of prior art:
(1) a kind of reverse osmosis antisludging agent dynamic evaluation method of the present invention's proposition adopts constant voltage, thermostatic mode operation.
(2) the invention provides a kind of secondary filter device; This secondary filter device is installed in behind the high-pressure pump between the dense water degree adjustment valve and inlet water tank on the pipeline; The secondary filter device is provided with transparent observation port; The filtrate intensity of variation be can observe intuitively, amount of scale buildup, scaling rate under the set recovery also can be obtained.
(3) the present invention adopts automatic data collection and disposal system to carry out the processing of data.Through input reverse osmosis membrane area, water inlet general assembly (TW), acquisition interval time in automatic data collection and disposal system, obtain reverse osmosis membrane permeation flux, the recovery, film permeation flux normalization coefficient (J
t/ J
0), the relation curve between film permeation flux normalization coefficient and the recovery.Realizing that evaluation result accurately and reliably on the basis, significantly reduces recording parameters and analysis to measure parameter, automaticity improves.
(4) can estimate the antisludging agent additive effect through the dynamics evaluation apparatus and the application process that adopt reverse osmosis antisludging agent of the present invention.Certain antisludging agent of auxiliary judgment maximum recovery that can reach more intuitively simultaneously.Eliminate the recovery when too high impurity separate out the disturbing effect that brings when the reverse osmosis membrane medicament screened.Through the film permeation flux normalization coefficient of more different antisludging agents and the relation curve between the recovery, the maximum recovery that the acquisition antisludging agent can reach is a limit scale inhibition ability.
The invention has the beneficial effects as follows:
The evaluating apparatus of a kind of reverse osmosis membrane antisludging agent provided by the invention and application process can be estimated reverse osmosis antisludging agent according to the service condition of actual reverse osmosis unit, the water quality characteristics of feed water by reverse osmosis; Filter out suitable reverse osmosis antisludging agent, also can be used for the research and development of antisludging agent.Device and application process is easy, with strong points, automaticity is high estimate to need water consumption to reduce, and evaluation time shortens, evaluation result accurately, reliable.
Description of drawings
Fig. 1 is a kind of dynamics evaluation apparatus of reverse osmosis antisludging agent and the process flow diagram of application process.
Fig. 2 is the result of embodiment 1.
Fig. 3 is the result of embodiment 2.
Fig. 4 is the result of embodiment 3.
Embodiment
Embodiment 1
A kind of dynamics evaluation apparatus of reverse osmosis antisludging agent; Include inlet water tank 1, thermostat 2, water inlet degree adjustment valve 7, high-pressure pump 3, secondary filter device 6, tensimeter 10, reverse osmosis membrane test pool 4, dense water degree adjustment valve 8; Reverse osmosis produced pond 5, automatic data collection and disposal system 9.Wherein secondary filter device 6 is filled filtrate polypropylene filter core, and filtering accuracy is 0.45 μ m; Put into the counter-infiltration diaphragm in the reverse osmosis membrane test pool 4, reverse osmosis membrane is a Tao Shi BW30 counter-infiltration diaphragm, and membrane material is an aromatic polyamide.
The total hardness of certain reverse osmosis unit water inlet at 389.5mg/L, pH 7.16, contains calcium ion 350.5mg/L, magnesium ion 61.5mg/L, sulfate radical 211.8mg/L, HCO up to 1132.5mg/L, total alkalinity
3 -237.6mg/L iron content 0.33mg/L dissolves silicone content 15mg/L, judges that this water belongs to lime carbonate, calcium sulfate scaling type.
Adopt the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent provided by the invention, in inlet water tank 1, add and estimate water sample 5L, add reverse osmosis antisludging agent; Marque is Flocon260; Add antisludging agent concentration at 5mg/L, open thermostatic bath 2, the feed water by reverse osmosis temperature is controlled at 35 ℃; Open water inlet degree adjustment valve 7, the dense water degree adjustment valve 8 of standard-sized sheet is opened high-pressure pump 3, and this moment, the reverse osmosis concentrated liquid circulation was returned inlet water tank 1 through secondary filter device 6; Treat that solution temperature is constant after 35 ℃ in the inlet water tank 1, regulate dense water degree adjustment valve 8, make high-pressure pump 3 back top hole pressures at 275psi; Reverse osmosis produced water continuous blow-down; Collect through reverse osmosis produced pond 4; Reverse osmosis produced pond 4 links to each other with disposal system 9 with automatic data collection, obtains reverse osmosis membrane permeation flux, the recovery, film permeation flux normalization coefficient (J through automatic data collection and disposal system 9
t/ J
0).
When the reverse osmosis membrane permeation flux reaches 10Lm
-2H
-1The time, out of service.It is thus clear that brown jelly impurity is arranged on secondary filter device 5 filter cores.Filter core is taken off, the oven dry weighing, amount of scale buildup is 1.2g
Equally, in inlet water tank 1, add and estimate water sample 5L, do not add any reverse osmosis antisludging agent, under above-mentioned equal conditions, move to the reverse osmosis membrane permeation flux and reach 10Lm
-2H
-1The time, out of service.It is thus clear that milky impurity is arranged on the filter core of secondary filter device 5.Filter core is taken off, the oven dry weighing, amount of scale buildup is 2.5g.
Fig. 2 is the relation curve between the reverse osmosis membrane permeation flux normalization coefficient and the recovery.Curve 1 is to add the reverse osmosis membrane permeation flux normalization coefficient of antisludging agent Flcon260 and the relation curve between the recovery.Curve 2 is not add the reverse osmosis membrane permeation flux normalization coefficient of antisludging agent and the relation curve between the recovery.
Can know through Fig. 2, not add antisludging agent, reverse osmosis membrane permeation flux normalization coefficient (J
t/ J
0) with the increase of the recovery, constantly decay; Add antisludging agent Flocon260, reverse osmosis membrane permeation flux normalization coefficient (J
t/ J
0) before the recovery 45%, substantially constant under 45% recovery, flex point occurs.
The additive effect that dynamics evaluation apparatus and the application process of embodiment 1 through adopting reverse osmosis antisludging agent provided by the invention estimated antisludging agent; Thereby judge that adding antisludging agent Flocon260 is effective to stoping fouling; Through having impurity to separate out in the secondary filter device intuitive judgment test; And impurity held back, that avoids impurity to separate out causing pollutes reverse osmosis membrane, disturbs the evaluation of antisludging agent.
Embodiment 2
A kind of dynamics evaluation apparatus of reverse osmosis antisludging agent; Include inlet water tank 1, thermostat 2, water inlet degree adjustment valve 7, high-pressure pump 3, secondary filter device 6, tensimeter 10, reverse osmosis membrane test pool 4, dense water degree adjustment valve 8; Reverse osmosis produced pond 5, automatic data collection and disposal system 9.Wherein secondary filter device 6 is filled filtrate polypropylene filter core, and filtering accuracy is 0.45 μ m; Put into the counter-infiltration diaphragm in the reverse osmosis membrane test pool 4, reverse osmosis membrane is a Tao Shi BW30 counter-infiltration diaphragm, and membrane material is an aromatic polyamide.
The water sample of estimating is with embodiment 1.In inlet water tank 1, add and estimate water sample 5L, add reverse osmosis antisludging agent, marque is Trsea265, adds antisludging agent concentration at 5mg/L, opens thermostatic bath 2, and the feed water by reverse osmosis temperature is controlled at 35 ℃; Open water inlet degree adjustment valve 7, the dense water degree adjustment valve 8 of standard-sized sheet is opened high-pressure pump 3, and this moment, the reverse osmosis concentrated liquid circulation was returned inlet water tank 1 through secondary filter device 6; Treat that solution temperature is constant after 35 ℃ in the inlet water tank 1, regulate dense water degree adjustment valve 8, make high-pressure pump 3 back top hole pressures at 275psi; Reverse osmosis produced water continuous blow-down; Collect through reverse osmosis produced pond 4; Reverse osmosis produced pond 4 links to each other with disposal system 9 with automatic data collection, obtains reverse osmosis membrane permeation flux, the recovery, film permeation flux normalization coefficient (J through automatic data collection and disposal system 9
t/ J
0), when the reverse osmosis membrane permeation flux reaches 10Lm
-2H
-1The time, out of service.Equally, in inlet water tank 1, add and estimate water sample 5L, add reverse osmosis antisludging agent, model YX-HZ641.Under above-mentioned equal conditions, move to the reverse osmosis membrane permeation flux and reach 10Lm
-2H
-1The time, out of service.
Fig. 3 is the result of embodiment 2.Curve 1 is to add the reverse osmosis membrane permeation flux normalization coefficient of antisludging agent Flcon260 and the relation curve between the recovery.Curve 3 is to add the reverse osmosis membrane permeation flux normalization coefficient of antisludging agent YX-HZ641 and the relation curve between the recovery.Curve 4 is to add the reverse osmosis membrane permeation flux normalization coefficient of antisludging agent Trsea265 and the relation curve between the recovery.
Can know through Fig. 3, add antisludging agent YX-HZ641 and add antisludging agent Trsea265, reverse osmosis membrane permeation flux normalization coefficient (J separately
t/ J
0) before the recovery 55%, substantially constant under 55% recovery, flex point occurs.
Embodiment 2 has estimated the scale inhibition effect of several kinds of antisludging agents through the dynamics evaluation apparatus that adopts reverse osmosis antisludging agent provided by the invention.Through the maximum recovery of comparing with embodiment 1, judge that antisludging agent YX-HZ641 and Trsea265 all are superior to Flcon260.
Embodiment 3
A kind of dynamics evaluation apparatus of reverse osmosis antisludging agent; Include inlet water tank 1, thermostat 2, water inlet degree adjustment valve 7, high-pressure pump 3, secondary filter device 6, tensimeter 10, reverse osmosis membrane test pool 4, dense water degree adjustment valve 8; Reverse osmosis produced pond 5, automatic data collection and disposal system 9.Wherein secondary filter device 6 is filled filtrate polypropylene filter core, and filtering accuracy is 0.45 μ m; Put into the counter-infiltration diaphragm in the reverse osmosis membrane test pool 4, reverse osmosis membrane is a Tao Shi BW30 counter-infiltration diaphragm, and membrane material is an aromatic polyamide.
Certain reverse osmosis unit design recovery reaches 75%.Feed water by reverse osmosis water quality is with embodiment 1.Can know under the condition that does not add acid by embodiment 2, adding antisludging agent Trsea265, maximum recovery does not reach 75%, moves if install according to the recovery of design 75%, has surpassed the scale inhibition ability of antisludging agent, certainly will cause film to pollute, and installs and cleans frequently.Investigate through the dynamics evaluation apparatus of this reverse osmosis antisludging agent and to add acid whether regulate the measure of feed water by reverse osmosis pH value feasible, carry out evaluation test according to the same terms of embodiment 2.
Fig. 4 is the result of embodiment 3.Curve 4 is to add the reverse osmosis membrane permeation flux normalization coefficient of antisludging agent Trsea265 and the relation curve between the recovery.Curve 5 is after adding antisludging agent Trsea265, adds acid again and regulates the reverse osmosis membrane permeation flux normalization coefficient of feed water by reverse osmosis pH value to 6.6 and the relation curve between the recovery.
Dynamic anti-scale test findings by Fig. 4 can know, regulates feed water by reverse osmosis pH value to 6.6 through adding acid, and can improve the maximum recovery that antisludging agent can reach is 80%.Embodiment 3 can instruct the operation of actual reverse osmosis unit according to the service condition of actual reverse osmosis unit, the water quality characteristics of feed water by reverse osmosis.
Claims (10)
1. the dynamics evaluation apparatus of a reverse osmosis antisludging agent; It is characterized in that comprising inlet water tank 1, thermostat 2, water inlet degree adjustment valve 7, high-pressure pump 3, secondary filter device 6, tensimeter 10, reverse osmosis membrane test pool 4, dense water degree adjustment valve 8; Reverse osmosis produced pond 5, automatic data collection and disposal system 9; Inlet water tank 1 links to each other with high-pressure pump 3 inlets through water inlet degree adjustment valve 7; On high-pressure pump 3 back export pipelines, reverse osmosis membrane test pool 4 is installed; Setting pressure table 10 on the pipeline between high-pressure pump 3 and the reverse osmosis membrane test pool 4; Dense water degree adjustment valve 8 links to each other with reverse osmosis membrane test pool 4; Secondary filter device 6 is installed on the pipeline between dense water degree adjustment valve 8 and the inlet water tank 1, and reverse osmosis produced pond 5 links to each other with reverse osmosis membrane test pool 4, and reverse osmosis produced pond 5 links to each other with disposal system 9 with automatic data collection.
2. the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 1 is characterized in that being provided with in the inlet water tank 1 gas-liquid separator, fair water fin.
3. the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 1; It is characterized in that filling filtrate in the secondary filter device 6, filtrate can be granular activated carbon, polypropylene (PP), Kynoar (PVDF), polyethersulfone (PES), polytetrafluoroethylene (PTFE), cellulose mixture (CN-CA), nylon, carbon fibre; Preferably: polypropylene (PP); Filtering accuracy can be 0.22 μ m, 0.45 μ m, 1 μ m, 3 μ m, 5 μ m, preferred 0.45 μ m.
4. the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 1; It is characterized in that establishing observation port on secondary filter device 6 housings; The observation port material is selected transparent plastic for use, can be polymethylmethacrylate (PMMA is commonly called as organic glass), PVC (PVC), polypropylene (PP), polyethylene terephthalate-1; 4-cyclohexanedimethanoester ester (PETG), polyethylene terephthalate (PET), preferred PMMA.
5. the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 1; It is characterized in that reverse osmosis membrane test pool 4 comprises two housing sections, reverse osmosis membrane, O-ring seal or sealing gasket, fastening bolt up and down; Wherein establish diversion trench in the reverse osmosis membrane test pool lower case, the side sets out the mouth of a river, establishes water inlet in the middle of reverse osmosis membrane test pool 4 upper body, the side sets out the mouth of a river.
6. the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 1; It is characterized in that reverse osmosis membrane test pool 4 shell materials are the 316L stainless steel; The reverse osmosis membrane that uses is commercialization counter-infiltration diaphragm, and membrane material can be aromatic polyamide, acetyl cellulose (CA).
7. the application process of the dynamics evaluation apparatus of a reverse osmosis antisludging agent comprises following steps:
(1) in inlet water tank 1, adds the evaluation water sample, add the reverse osmosis antisludging agent concentration range at 2mg/L～5mg/L;
(2) open thermostat 2, the feed water by reverse osmosis temperature is controlled at a steady state value in 25 ℃～40 ℃ scopes; Open water inlet degree adjustment valve 7, the dense water degree adjustment valve 8 of standard-sized sheet is opened high-pressure pump 3, and this moment, the reverse osmosis concentrated liquid circulation was returned inlet water tank 1 through secondary filter device 6;
(3) treat in the inlet water tank 1 that solution temperature is constant after, regulate dense water degree adjustment valve 8, make the steady state value of high-pressure pump 3 back top hole pressure scopes in 250psi～300psi; Reverse osmosis produced water continuous blow-down is collected through reverse osmosis produced pond 5;
(4) reverse osmosis produced pond 5 links to each other with disposal system 9 with automatic data collection, obtains reverse osmosis membrane permeation flux, the recovery, film permeation flux normalization coefficient (J through automatic data collection and disposal system 9
t/ J
0).
8. the application process of the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 7 is characterized in that when the device operation steady state value of pressure control in 270psi～280psi scope.
9. the application process of the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 7; When it is characterized in that practical implementation; When the device operation, inflow temperature is through thermostatic bath control, and the feed water by reverse osmosis temperature is controlled at a steady state value in 30 ℃～35 ℃ scopes.
10. the application process of the dynamics evaluation apparatus of a kind of reverse osmosis antisludging agent according to claim 7; It is characterized in that obtaining reverse osmosis membrane permeation flux, the recovery, film permeation flux normalization coefficient (J through input reverse osmosis membrane area, water inlet general assembly (TW), acquisition interval time in automatic data collection and disposal system
t/ J
0), the relation curve between film permeation flux normalization coefficient and the recovery.
Priority Applications (1)
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| CN104535724A (en) * | 2014-12-29 | 2015-04-22 | 中国石油大学(华东) | Device and method for measuring leakoff coefficient of supercritical carbon dioxide fracturing fluid |
| CN112557318A (en) * | 2020-11-19 | 2021-03-26 | 西安热工研究院有限公司 | Method for rapidly evaluating scale inhibition performance of reverse osmosis scale inhibitor |
| CN113477097A (en) * | 2021-07-20 | 2021-10-08 | 清华大学 | Device and method for predicting reverse osmosis membrane fouling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104535724A (en) * | 2014-12-29 | 2015-04-22 | 中国石油大学(华东) | Device and method for measuring leakoff coefficient of supercritical carbon dioxide fracturing fluid |
| CN104535724B (en) * | 2014-12-29 | 2016-02-24 | 中国石油大学(华东) | Measure the device and method of supercritical carbon dioxide fracturing fluid leak coefficient |
| CN112557318A (en) * | 2020-11-19 | 2021-03-26 | 西安热工研究院有限公司 | Method for rapidly evaluating scale inhibition performance of reverse osmosis scale inhibitor |
| CN112557318B (en) * | 2020-11-19 | 2024-01-23 | 西安热工研究院有限公司 | Method for rapidly evaluating scale inhibition performance of reverse osmosis scale inhibitor |
| CN113477097A (en) * | 2021-07-20 | 2021-10-08 | 清华大学 | Device and method for predicting reverse osmosis membrane fouling |
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| CN102455278B (en) | 2014-07-09 |
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