CN106315711A - Layer-by-layer slow release water treatment agent for delaying sea water membrane pollution and preparation method thereof - Google Patents
Layer-by-layer slow release water treatment agent for delaying sea water membrane pollution and preparation method thereof Download PDFInfo
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- CN106315711A CN106315711A CN201610854461.4A CN201610854461A CN106315711A CN 106315711 A CN106315711 A CN 106315711A CN 201610854461 A CN201610854461 A CN 201610854461A CN 106315711 A CN106315711 A CN 106315711A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
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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
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention provides a layer-by-layer slow release water treatment agent for delaying sea water membrane pollution and a preparation method thereof, and relates to the technical field of slow release water treatment agents. The layer-by-layer slow release water treatment agent for delaying sea water membrane pollution consists of an adsorption agent inner layer, a coagulant aid covering layer and a flocculating agent outer layer, wherein inner layer adsorbing agents are powdery active carbon and diatomite; covering layer coagulant aids are polyacrylamide and poly dimethyl diallyl ammonium chloride; outer layer flocculating agents are iron type and aluminum type flocculating agents. The preparation method of the layer-by-layer slow release water treatment agent for delaying sea water membrane pollution comprises the following steps that the powdery active carbon and the diatomite are put into a pelleting machine to perform circumferential rotation; the diluted coagulant aid solution is added onto the rotating powdery active carbon and diatomite to perform covering; particles are formed; the flocculating agents are added and wrap the outermost layer of the particles; rotating and drying are performed. The flocculation, the coagulation aid, the adsorption and the dynamic membrane are integrated; the layer-by-layer slow release structure is used; cooperative and synergistic action is achieved; the membrane pollution resistance is reduced; the membrane pollution is delayed; the preparation process is simple; the operation is convenient; the application prospects are good.
Description
Technical field
The present invention relates to slow release water treatment agent technical field, particularly relate to a kind of successively slow release delaying sea water fouling membrane
Water treatment agent and preparation method thereof.
Background technology
Ultrafiltration is widely used membrane separating technology, and the aperture of ultrafiltration is 0.002-0.200 μm, and ultrafiltration is pre-as sea water
Processing technique, float, colloid and the microorganism in removable sea water, producing water ratio is big, stable effluent quality.But hyperfiltration membrane assembly
Can block, fouling membrane causes flux depression, reduces film service life, increases cleaning frequency membrane, limit the wide of ultrafiltration
General application.Dynamic Membrane refers to add precoating paint or stock solution to be had point what medium membrane surface was formed itself by filtration
Cake layer or film from performance.Dynamic Membrane material source enriches, and wherein flocculation is the conventional preprocess method of decelerating membrane pollution, can
Improving effluent quality, the flco that flocculation is formed can form one layer of loose cake layer at ultrafiltration membrane surface, can stop little granule
Pollutant enter fenestra and cause irreversible membrane fouling, and then play the purpose of decelerating membrane pollution.
Conventional flocculant function singleness, and for the preventing membrane pollution under briny environment inapplicable, it is in particular in following
Several respects: the Organic substances such as humic acid in sea water, fulvic acid, protein can adsorb on suspended particulates surface, form aquation protection
Layer, makes suspended particulates have stronger dispersion stabilization, and then increases the difficulty of flocculation；Sea water is in low turbid state throughout the year, outstanding
The negligible amounts of floating microgranule, the flco of formation is tiny, causes cake layer structure closely knit, increases filtration resistance；Additionally, northern China
Offshore sea waters has the freezeup period up to 5 months every year, is in the seawater viscosity under low temperature state relatively big, have impact on the water of flocculant
Solving speed, the speed of growth of flco is relatively slow, adds process treatment time.The effective way solving this difficult problem is that employing is multiple
The water treatment agent of difference in functionality or composite water disposal agent replace single flocculant.
At present, the water treatment agent of multiple difference in functionality or composite water disposal agent has been used to carry out the relevant report of lessening membrane fouling
Road, such as patent of invention " method reducing delivery turbidity during a kind of diatomite dynamic membrane former water of process further ", (China is specially
Profit number: disclose a kind of method extending the Dynamic Membrane working cycle in CN 102557197 B), the method is by filtration system
In a point different batches add kieselguhr and aluminium polychlorid, form one layer of compound Dynamic Membrane on macropore stainless (steel) wire surface, with fall
Low delivery turbidity.The method adds again aluminium polychlorid additives after the circulation precoating of kieselguhr initial stage, although can improve silicon
Diatomaceous earth Dynamic Membrane structure of filtering layer, but the flco cake layer that aluminium polychlorid is formed is the loosest, it is impossible to well reduced filtration resistance
Power, and the time in batches adding medicament be difficult to accurately control, administration apparatus process control is more complicated, adds and runs into
This.Patent of invention " a kind of antifilm contaminative composite drug " (China Patent No.: CN 1321917 C) discloses a kind of for
The preventing membrane pollution composite drug of sewage disposal, including Powdered Activated Carbon, aluminium polychlorid, ferric chloride, calcium hydroxide and poly-third
Amide, can improve the filtering feature of mixed liquor in membrane bioreactor, maintains higher membrane flux, reduces fouling membrane, but this
Each component of composite drug is simple uniformly mixing, it is impossible to controlling the dissolving process of each component, each component is difficult to give full play to
Each effect, it is impossible to reach optimal using effect, and cause the technical problems such as the waste of medicament and secondary pollution.
Summary of the invention
To be solved by this invention problematically, overcome the drawbacks described above that technology of taking over exists, and provide one to delay sea
Successively slow release water treatment agent that moisture film pollutes and preparation method thereof.
Delaying the successively slow release water treatment agent of sea water fouling membrane, internal layer is the one in Powdered Activated Carbon, kieselguhr or two
Plant mixing, and by one or both mixing in polyacrylamide (PAM), PDDA (PDMDAAC)
Being coated with, outer layer is one or more mixing in ferrum system, AlSnSi alloy.Water treatment agent of the present invention be shaped as ball
Shape or subglobular, particle diameter is 1-3mm.
The preparation process delaying the successively slow release water treatment agent of sea water fouling membrane is: by the powder of shared weight ratio 40-60%
One or both mixing in end activated carbon, kieselguhr are put into and are carried out circumference rotation in comminutor, by shared weight ratio 10-15%
Polyacrylamide (PAM), one or both mixing same ratio in PDDA (PDMDAAC)
Distilled water diluting dissolve, and by peristaltic pump by polyacrylamide (PAM), PDDA
(PDMDAAC) one or both mixed solutions injection in is wrapped up on the Powdered Activated Carbon rotated and kieselguhr, is formed
Continue after circular granular to rotate；By one or more mixing in the aluminum system of shared weight ratio 30-45%, iron-based flocculating agent, use
After the distilled water diluting mixing of same ratio, by peristaltic pump, flocculant solution is injected on bead, flocculant is wrapped in
The outermost layer of small spherical particles, rotates 10-20min again to stable after molding, be then dried 1h at 60-70 DEG C, it is thus achieved that successively slow release
Water treatment agent.
Water treatment agent of the present invention plays a role according to different time serieses.The ferrum system of outer layer, AlSnSi alloy head
First dissolve, carry out charge neutrality effect by compression double electric layer, capture the suspended particulates in sea water, colloid, larger molecular organics etc.,
Form thin and little flco；The polyacrylamide (PAM) of integument, PDDA (PDMDAAC) subsequently
Start to dissolve, play Coagulation aiding, not only can strengthen charge neutrality effect, moreover it is possible to improve adsorption bridging ability, promote that flco is grown up；
Finally, subsurface adsorption agent Powdered Activated Carbon, kieselguhr start to play a role, the Organic substance of the adsorbable remnants of its cellular structure,
And in the Dynamic Membrane of ultrafiltration membrane surface formation different pore size together with flco, reduce membrane pollution resistance, slow down the blocking of ultrafilter membrane.
One of this case purpose be to provide one have Collecting flocculation, help solidifying, absorption, Dynamic Membrane function in one, successively slow release
Structure, multiple efficacies Synergistic, reduce membrane pollution resistance, lessening membrane fouling, application prospect is good, especially can effectively delay low
The successively slow release water treatment agent delaying sea water fouling membrane of the features such as temperature sea water Pollution of Ultrafiltration Membrane.
The present invention delays the successively slow release water treatment agent of sea water fouling membrane to take techniques below scheme to realize:
A kind of successively slow release water treatment agent delaying sea water fouling membrane, it is characterised in that delay sea water fouling membrane successively
Slow release water treatment agent is made up of adsorbent internal layer, flocculation aid integument and flocculant outer layer, subsurface adsorption agent be Powdered Activated Carbon,
One or both mixing in kieselguhr, integument flocculation aid is in polyacrylamide, PDDA
One or both mixing, outer layer flocculant is one or more mixing in ferrum system, AlSnSi alloy.
It is the most real that this case delays the successively slow release water treatment agent of sea water fouling membrane that techniques below measure can also be used
Existing:
The aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, subsurface adsorption agent, integument flocculation aid and
The mass ratio of outer layer flocculant is 40-60: 10-15: 30-45.
The aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, delays the successively slow release of sea water fouling membrane
Water treatment agent is shaped as spherical or spherical particle, and particle diameter is 1-3mm.
The aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, subsurface adsorption agent Powdered Activated Carbon, diatom
The particle diameter of soil is 90-106 μm.
The aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, iron-based flocculating agent is iron chloride, sulphuric acid
Ferrum, poly-ferric chloride or bodied ferric sulfate, AlSnSi alloy is aluminum chloride, aluminum sulfate, aluminium polychlorid or polyaluminium sulfate.
The two of this case purpose are to provide one, and to have technique simple, easy to operate, product Collecting flocculation, helps solidifying, absorption, dynamically
Film function, in one, successively release structures, multiple efficacies Synergistic, reduces membrane pollution resistance, lessening membrane fouling, application prospect
The preparation method of the successively slow release water treatment agent delaying sea water fouling membrane of the feature such as good.
The present invention delays the preparation method of the successively slow release water treatment agent of sea water fouling membrane to be to take techniques below scheme
Realize:
Delay the preparation method of the successively slow release water treatment agent of sea water fouling membrane, it is characterised in that delay sea water fouling membrane
The preparation process of successively slow release water treatment agent be that one or both mixing in Powdered Activated Carbon, kieselguhr are put into
Comminutor carries out circumference rotation；The flocculation aid solution of dilution is added on the Powdered Activated Carbon of rotation and kieselguhr and wraps
Wrap up in, continue to rotate after forming granule；It is added on granule after flocculant is diluted, makes flocculant be wrapped in the outermost layer of granule, rotation
Turn, be dried, obtain delaying the successively slow release water treatment agent of sea water fouling membrane.
This case delays the preparation method of the successively slow release water treatment agent of sea water fouling membrane can also use techniques below measure
Realize further:
The preparation method of the aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, the flocculation aid of dilution is molten
Liquid uses peristaltic pump to be injected on the Powdered Activated Carbon of rotation and/or kieselguhr and wraps up, continue rotation after forming circular granular
Turn；It is injected on circular granular by peristaltic pump after flocculant is diluted, makes flocculant be wrapped in the outermost layer of circular granular.
The preparation method of the aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, the flocculation aid of dilution is molten
Liquid uses distilled water to be diluted, and the mass percent of flocculation aid consists of 40-60%.
The preparation method of the aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, flocculant dilution uses
Distilled water is diluted, and the mass percent of flocculant consists of 40-60%.
The preparation method of the aforesaid successively slow release water treatment agent delaying sea water fouling membrane, wherein, flocculant is wrapped in
After the outermost layer of grain, then rotate 10-20min to stable, under the conditions of 60-70 DEG C, be then dried 0.5-2h, obtain being shaped as ball
Shape or class are spherical, the successively slow release water treatment agent delaying sea water fouling membrane of particle diameter 1-3mm.
The present invention compared with prior art has significant advantage and beneficial effect.From above technical scheme, this
Bright successively slow release water treatment agent delaying sea water fouling membrane and preparation method thereof, at least following advantage:
1, the most generally employing adds flocculant or adsorbent carrys out lessening membrane fouling, and function is the most single, lessening membrane fouling
Effect limited.The present invention is Collecting flocculation, it is solidifying to help, absorption, Dynamic Membrane function play in the water treatment agent of one, inorganic flocculating agent
Compression double electric layer effect capture suspended particulates, colloid etc. form flco；PAM, PDMDAAC organic flocculant has played adsorption bridging
Effect, promote growing up of flco；Powdered Activated Carbon, kieselguhr etc. play adsorption and remove the Organic substance in sea water.Many
Plant effect jointly to play, reduce membrane pollution resistance, lessening membrane fouling.
2, in view of the low-temperature and low turbidity characteristic of sea water, it is unsatisfactory that conventional flocculant processes sea water effect, and the flco of generation is little
And thin, cause the flco Dynamic Membrane structure generated closely knit, increase filtration resistance.
The flco that the present invention is formed is big and loose, and water penetration is relatively strong, dynamic with what Powdered Activated Carbon, kieselguhr collectively constituted
Film, has the multiplet of different pore size, improves Dynamic Membrane structure, the significantly more efficient blocking slowing down ultrafilter membrane.The present invention
Water treatment agent be applicable to briny environment, especially can effectively delay low temperature seawater Pollution of Ultrafiltration Membrane.
3, the use of current various medicaments, in order to reach respective effect, it usually needs throw in batches according to dissolution time
Adding, process is relatively complicated.The water treatment agent of the present invention is successively release structures, by the dissolving of each component of the structural adjustment of medicament
Sequential, each component plays respective effect by certain time sequence, it is ensured that independence that each component plays a role and dissolution time
Continuity, Synergistic, improve the dosing method of medicament simultaneously, simplify dispensing process.
The present invention contrasts prior art significantly contribution and progressive, strictly has novelty, creativeness, practicality
Good technology.
Accompanying drawing explanation
Fig. 1 is the attenuation curve of low temperature seawater ultra-filtration process membrane flux under embodiment 5 different agents；
Fig. 2 is the attenuation curve of normal temperature seawater ultra-filtration process membrane flux under embodiment 6 different agents.
Detailed description of the invention
The detailed description of the invention of the present invention is shown in detail in by following example.
Below in conjunction with preferred embodiment, to detailed description of the invention, step, feature and effect thereof of providing according to the present invention,
Describe in detail as follows.
Embodiment 1
A kind of successively slow release water treatment agent delaying sea water fouling membrane, by adsorbent internal layer, flocculation aid integument and flocculation
Agent outer layer is constituted, and subsurface adsorption agent is Powdered Activated Carbon, and integument flocculation aid is polyacrylamide, and outer layer flocculant is polymerization chlorine
Change ferrum.Subsurface adsorption agent Powdered Activated Carbon particle diameter is 90 μm.Subsurface adsorption agent, integument flocculation aid and the quality of outer layer flocculant
Ratio is 40: 15: 45.The successively slow release water treatment agent delaying sea water fouling membrane is shaped as spherical, and particle diameter is 1mm.
Thus, being added in sea water by gained successively slow release water treatment agent, each component discharges molten successively according to time series
Solve, both played flocculant compression double electric layer effect, played again flocculation aid charge neutrality and adsorption bridging effect, also had simultaneously and inhale
Attached effect, overcomes the shortcoming that single medicament usefulness in the seawater is low.
Embodiment 2
A kind of successively slow release water treatment agent delaying sea water fouling membrane, by adsorbent internal layer, flocculation aid integument and flocculation
Agent outer layer is constituted, and subsurface adsorption agent is kieselguhr, and integument flocculation aid is PDDA, outer layer flocculant
For aluminium polychlorid.Subsurface adsorption agent Powdered Activated Carbon, diatomaceous particle diameter are 90-106 μm.Subsurface adsorption agent, integument help
The mass ratio of solidifying agent and outer layer flocculant is 60: 10: 30.The successively slow release water treatment agent delaying sea water fouling membrane is shaped as class ball
Shape granule, particle diameter is 3mm.
Thus, being added in sea water by gained successively slow release water treatment agent, first aluminium polychlorid plays flocculation, catches
Obtain the suspended particulates in sea water, colloid etc. and form tiny flco；Secondly PDDA plays Coagulation aiding,
Make flco big and loose；Last kieselguhr plays adsorption.
After flocculation, helping solidifying, adsorption, now the pollutant load in sea water significantly reduces, and can effectively slow down super
The pollution level of filter membrane.
Embodiment 3
A kind of successively slow release water treatment agent delaying sea water fouling membrane, by adsorbent internal layer, flocculation aid integument and flocculation
Agent outer layer is constituted, and subsurface adsorption agent is that Powdered Activated Carbon and kieselguhr, Powdered Activated Carbon and kieselguhr are mixed by 1: 1 mass ratio,
Integument flocculation aid is polyacrylamide and the PDDA mixing of mass ratio 1: 1, and outer layer flocculant is
The iron chloride of mass ratio 1: 1 and aluminum chloride mixing.Subsurface adsorption agent Powdered Activated Carbon, diatomaceous particle diameter are 100 μm.Internal layer is inhaled
The mass ratio of attached dose, integument flocculation aid and outer layer flocculant is 50: 13: 37.Delay at the successively slow release water of sea water fouling membrane
Reason agent is shaped as spheroidal particle, and particle diameter is 2mm.
Thus, being added in sea water by gained successively slow release water treatment agent, each component plays wadding successively according to time series
Coagulate, help solidifying, adsorption, form the Dynamic Membrane with multiplet collectively constituted by flco and Powdered Activated Carbon, kieselguhr,
Water penetration is relatively strong, and interception function is notable.
Embodiment 4
The preparation method of a kind of successively slow release water treatment agent delaying sea water fouling membrane, its preparation process is, by powder
One or both mixing in end activated carbon, kieselguhr are put into and are carried out circumference rotation in comminutor；Flocculation aid uses distilled water to enter
Row dilution is dissolved, and the mass concentration of flocculation aid solution is 50%, and flocculation aid solution is injected in the powder of rotation by peristaltic pump
Wrap up on activated carbon and/or kieselguhr, continue to rotate after forming circular granular；Aluminum system and/or iron-based flocculating agent use and steam
Distilled water is diluted dissolving, and the mass concentration of flocculant solution is 50%, and by peristaltic pump, flocculant solution is injected in circle
On granule, make flocculant be wrapped in the outermost layer of circular granular, then rotate 10-20min to stable, then 60-70 DEG C of condition
Under be dried 1h, obtain being shaped as spherical or class be spherical, the successively slow release water delaying sea water fouling membrane of particle diameter 2mm processes
Agent.
Thus, being added in sea water by gained successively slow release water treatment agent, each component is according to flocculant, flocculation aid, absorption
The sequencing of agent discharges dissolving successively and plays a role, Synergistic, both ensure that the independence playing effect, in turn ensure that
The continuity of time.
Embodiment 5
The preparation method of a kind of successively slow release water treatment agent delaying sea water fouling membrane, successively slow release water treatment agent is used for locating
Reason low temperature seawater, its preparation process:
The sieve instrument that shakes is utilized to obtain the Powdered Activated Carbon and kieselguhr that particle diameter is 90-106 μm, by the powder of shared weight ratio 50%
End activated carbon and kieselguhr, by 1: 1 mixing, are put into and are carried out circumference rotation in comminutor, by the polyacrylamide of shared weight 10%
(PAM) dissolve with the distilled water diluting of same ratio, and by peristaltic pump, polyacrylamide (PAM) solution is injected in rotation
Wrap up on kieselguhr, continue to rotate after forming circular granular；By poly-ferric chloride and the polymerised sulphur of shared weight ratio 40%
Flocculant solution, by 1: 1 mixing, after mixing with the distilled water diluting of same ratio, is injected in bead by peristaltic pump by acid aluminum
On, flocculant is wrapped in the outermost layer of small spherical particles, rotates 10-20min after molding again to stable, then dry at 60-70 DEG C
Dry 1h, it is thus achieved that successively slow release water treatment agent.
Add respectively in 4-8 DEG C of sea water 50mg/L by 1: 1 mixing Powdered Activated Carbon and kieselguhr, by 1: 1 mixing
Poly-ferric chloride and flocculant of polymeric aluminium chloride, successively slow release water treatment agent, pass through through quickly mixing 2min under 200r/min
Ultrafiltration cup, uses nitrogen pressure to drive, and filter pressure is 80KPa, measures with electronic balance Automatic continuous, investigates different agents pair
The impact of fouling membrane, and contrast with the sea water ultra-filtration process of non-adding medicine.Result of the test shows: with without adding of agent phase
Ratio, adds under the membrane flux of poly-ferric chloride, polyaluminium sulfate mixed flocculation agent and Powdered Activated Carbon, kieselguhr mixed adsorbent
Fall has been alleviated, and membrane flux loss rate is respectively 35%, 28%；By comparison, the membrane flux of successively slow release water treatment agent is added
Declining minimum, membrane flux loss rate is only 13%, and lessening membrane fouling effect is notable.
Embodiment 6
The preparation method of a kind of successively slow release water treatment agent delaying sea water fouling membrane, successively slow release water treatment agent is used for locating
Reason normal temperature seawater, its preparation process:
Utilize the sieve instrument that shakes to obtain the kieselguhr that particle diameter is 90-106 μm, the kieselguhr of shared weight ratio 40% is put into pelletize
Machine carries out circumference rotation, by the PDDA (PDMDAAC) of shared weight 15% same ratio
Distilled water diluting dissolves, and by peristaltic pump, PDDA (PDMDAAC) solution is injected in rotation
Wrap up on kieselguhr, continue to rotate after forming circular granular；By the poly-ferric chloride of shared weight ratio 45%, with the most on year-on-year basis
After the distilled water diluting mixing of example, by peristaltic pump, flocculant solution is injected on bead, flocculant is wrapped in little variole
The outermost layer of grain, rotates 10-20min again to stable after molding, be then dried 1h at 60-70 DEG C, it is thus achieved that successively slow release water processes
Agent.
The present embodiment, under the experimental condition that embodiment 5 describes, adds the diatom of 60mg/L in 14-21 DEG C of sea water respectively
Soil, poly-ferric chloride, successively slow release water treatment agent, and contrast with the sea water ultra-filtration process of non-adding medicine.Result of the test table
Bright: in the case of without adding of agent, the flux depression of sea water ultra-filtration process is the most serious, membrane flux loss rate reach 40% with
On；The fouling membrane adding poly ferric chloride flocculant agent and diatomite adsorbant has been alleviated, membrane flux loss rate is respectively 26%,
29%；By comparison, the flux depression adding successively slow release water treatment agent is minimum, and membrane flux loss rate is 12%, delays film
Pollution effects is notable.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma restriction, all
It is based on any simple modification, equivalent variations and modification that above example is made by the technical spirit of the present invention, all still falls within
In the range of technical solution of the present invention.
Claims (10)
1. the successively slow release water treatment agent delaying sea water fouling membrane, it is characterised in that delay successively delaying of sea water fouling membrane
Releasing water treatment agent to be made up of adsorbent internal layer, flocculation aid integument and flocculant outer layer, subsurface adsorption agent is Powdered Activated Carbon, silicon
One or both mixing in diatomaceous earth, integument flocculation aid is in polyacrylamide, PDDA
Planting or two kinds of mixing, outer layer flocculant is one or more mixing in ferrum system, AlSnSi alloy.
The successively slow release water treatment agent delaying sea water fouling membrane the most according to claim 1, it is characterised in that subsurface adsorption
The mass ratio of agent, integument flocculation aid and outer layer flocculant is 40-60: 10-15: 30-45.
The successively slow release water treatment agent delaying sea water fouling membrane the most according to claim 1 and 2, it is characterised in that delay
The successively slow release water treatment agent of sea water fouling membrane is shaped as spherical or spherical particle, and particle diameter is 1-3mm.
4. according to the successively slow release water treatment agent delaying sea water fouling membrane described in any one of claim 1-3, it is characterised in that
Subsurface adsorption agent Powdered Activated Carbon, diatomaceous particle diameter are 90-106 μm.
5. according to the successively slow release water treatment agent delaying sea water fouling membrane described in any one of claim 1-4, it is characterised in that
Iron-based flocculating agent is iron chloride, iron sulfate, poly-ferric chloride or bodied ferric sulfate, and AlSnSi alloy is aluminum chloride, aluminum sulfate, gathers
Close aluminum chloride or polyaluminium sulfate.
6. any one of claim 1-5 delays the preparation method of successively slow release water treatment agent for sea water fouling membrane, its feature
Being, the preparation process delaying the successively slow release water treatment agent of sea water fouling membrane is, by Powdered Activated Carbon, kieselguhr
One or both mixing are put into and are carried out circumference rotation in comminutor；Flocculation aid solution by dilution is added in the Powdered Activated Carbon of rotation
Wrap up with on kieselguhr, continue to rotate after forming granule；It is added on granule after flocculant is diluted, makes flocculant be wrapped in
The outermost layer of granule, rotates, and is dried, obtains delaying the successively slow release water treatment agent of sea water fouling membrane.
The preparation method of the successively slow release water treatment agent delaying sea water fouling membrane the most according to claim 6, its feature exists
Use peristaltic pump to be injected on the Powdered Activated Carbon of rotation and/or kieselguhr in the flocculation aid solution of, dilution to wrap up, formed
Continue after circular granular to rotate；It is injected on circular granular by peristaltic pump after flocculant is diluted, makes flocculant be wrapped in circle
The outermost layer of shape granule.
8. according to the preparation method of the successively slow release water treatment agent delaying sea water fouling membrane described in claim 6 or 7, its feature
Being, the flocculation aid solution of dilution uses distilled water to be diluted, and the mass percent of flocculation aid consists of 40-60%.
9. according to the preparation method of the successively slow release water treatment agent delaying sea water fouling membrane described in any one of claim 6-8,
It is characterized in that, flocculant dilution uses distilled water to be diluted, and the mass percent of flocculant consists of 40-60%.
10. according to the preparation method of the successively slow release water treatment agent delaying sea water fouling membrane described in any one of claim 6-9,
It is characterized in that, after flocculant is wrapped in the outermost layer of granule, then rotate 10-20min to stable, then 60-70 DEG C of condition
Under be dried 0.5-2h, obtain being shaped as spherical or class be spherical, the successively slow release water delaying sea water fouling membrane of particle diameter 1-3mm
Inorganic agent.
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