CN104492273A - Alkaline membrane washing agent and preparation method thereof - Google Patents
Alkaline membrane washing agent and preparation method thereof Download PDFInfo
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- CN104492273A CN104492273A CN201410852641.XA CN201410852641A CN104492273A CN 104492273 A CN104492273 A CN 104492273A CN 201410852641 A CN201410852641 A CN 201410852641A CN 104492273 A CN104492273 A CN 104492273A
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Abstract
The invention discloses an alkaline membrane washing agent. The alkaline membrane washing agent comprises the following components in percentage by weight: 5wt%-30wt% of inorganic alkali, 1wt%-20wt% of a surfactant, 0-10wt% of an auxiliary washing agent, 0.5wt%-3wt% of a membrane protection agent, 0-10wt% of an alcohol ether type solvent, 0-1wt% of a de-foaming agent and the balance being water. The alkaline membrane washing agent has a good washing effect, and a good market application prospect and the cost is lowered.
Description
Technical field
The present invention relates to a kind of alkaline membrane cleaning agent and preparation method thereof.
Background technology
Film is the material with Selective Separation function.Utilize that the Selective Separation of film realizes the separation of the different component of feed liquid, purifying, concentrated process are called UF membrane, chemical industry, water treatment, food and biotechnology industry, weaving leather industry, paper industry are widely used in, multiple field such as medical and health at present.At present, existing film has microfiltration membranes, milipore filter, NF membrane and RO reverse osmosis membrane etc. to use a class of organic or inorganic material production or a few class film group.Microfiltration membranes can retain the particle between 0.1-1 micron, and microfiltration membranes allows large molecule and soluble solid (inorganic salts) etc. to pass through, but can retain suspension, bacterium, and the material such as macromolecule colloid.Milipore filter, be that a kind of aperture specification is consistent, nominal pore scope is the micropore filtering film of 0.001-0.02 micron.NF membrane: aperture is at more than 1nm, and general 1-2nm is the functional pellicle of one allowing solvent molecule or some low molecular weight solutes or low price ion permeable.RO reverse osmosis membrane aperture is little of nanoscale, is a kind of artificial pellicle with certain characteristic of simulating biological semi-permeable film and making.
Constantly carry out along with industrial, the pollution of film group is inevitable, film group pollution level is more severe, the permeability of film group is poorer, if cleaned film group not in time in process of production, film group will occur irreversible rotten, thus causes film group to scrap, and causes extremely large economic loss.The cleaning agents of membrane of current city pin mainly contains three types: alkaline cleaner, alkaline cleaner, enzyme preparation cleaning agent.
The alkaline cleaner of existing bibliographical information, generally only containing highly basic, or the combination of highly basic and complex compound, surfactant, simply, cleaning performance is not good, and e.g., publication number is cleaning agent disclosed in the patent application of CN1025553452A for this kind of cleaning agent component.And commercially available alkaline cleaner general at present, e.g., the LC-90 cleaning agents of membrane of Xiamen membrane environment technical concern Co., Ltd, although lotion effect is comparatively satisfactory, price is too high, and the cost that enterprise uses is high.
Summary of the invention
In order to solve the problem, the invention provides a kind of new alkaline membrane cleaning agent and preparation method thereof.
Alkaline membrane cleaning agent of the present invention, it comprises the component of following percentage:
Inorganic base 5-30wt%, surfactant 1-20wt%, builder 0-10wt%, film protective agent 0.5-3wt%, alcohol ether solvent 0-10wt%, defoamer 0-1wt%, all the other are water.
Alkaline cleaner of the present invention can be used for microfiltration membranes, milipore filter, NF membrane and RO reverse osmosis membrane etc. and uses a class of organic or inorganic material production or the cleaning of a few class film group.
Preferably, it comprises the component of following percentage: inorganic base 8-10wt%, surfactant 10-15wt%, builder 2-8wt%, film protective agent 0.5-2wt%, alcohol ether solvent 1.5-8wt%, defoamer 0.1-0.5wt%, and all the other are water.
Further preferably, it comprises the component of following percentage: inorganic base 8-10wt%, surfactant 14-15wt%, builder 2-3wt%, film protective agent 1wt%, alcohol ether solvent 1.5-2wt%, defoamer 0.2wt%, and all the other are water.
Wt%: percentage by weight.
Described inorganic base is NaOH and or potassium hydroxide.
Described surfactant is one or more in AEO, TX series of surfactants, AES.Preferably, described TX series of surfactants is TX-8 or TX-10.
Described builder is one or more in sodium phosphate trimer, sodium metasilicate, sodium sulphate and Sodium Polyacrylate.
Described film protective agent is mainly adsorbed film type corrosion inhibiter and/or type oxide film corrosion inhibiter.Preferably, described type oxide film corrosion inhibiter is natrium nitrosum.
Described alcohol ether solvent is one or more one or more in ethylene glycol, methyl alcohol, ethanol, propandiol butyl ether, butyl glycol ether and triethylene glycol butyl ether.
Described defoamer is polyethers defoamer.Preferably, described polyethers defoamer is bubble enemy.
The preparation method of alkaline membrane cleaning agent of the present invention, it comprises the steps:
A () gets raw material according to aforementioned proportioning;
B () adds other solid materials in inorganic base, mixing, then adds water and stir;
C () under agitation, adds liquid charging stock than water, add water constant volume, stirs.
Cleansing composition of the present invention is a quasi-alkali type cleaning agents of membrane, be mainly used in dissolving and be adsorbed on protein, the fats organic substance that film is surperficial and fenestra is inner, organic substance wherein also comprises the glucide such as glucose, starch, other biological macromolecular substances, the colloidal type compound etc. that part inanimate matter and organic matter and inorganic matter are formed.
Alkaline membrane cleaning agent of the present invention is by selecting specific highly basic, surfactant, builder, film protective agent, alcohol ether solvent and defoamer; composite use under specific proportioning, effectively can remove the organic substances such as heavy dirty greasy dirt, protein substance, greasy dirt, colloidal type.The present invention uses multivariate table surfactant system, due to the collaborative solubilising effect between various inhomogeneity surfactant, more can reduce the surface tension of greasy dirt, thus further increase the removal effect to greasy dirt than existing unitary system.Meanwhile, the film protective agent that the present invention adds is then form certain diaphragm in film group and equipment surface, for preventing highly basic to the corrosion of equipment, guarantees the security used.
The cleaning performance of alkaline membrane cleaning agent of the present invention is very good, be better than LC-90 No. II cleaning agents of membrane of Xiamen membrane environment technical concern Co., Ltd, and preparation technology is simple, raw material is all comparatively common, with low cost, simple to equipment requirement, easily realize suitability for industrialized production, prospects for commercial application is good.
The detailed description of the invention of form by the following examples, is described in further detail foregoing of the present invention.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment.All technology realized based on foregoing of the present invention all belong to scope of the present invention.
Accompanying drawing explanation
Fig. 1 wash result compares
Fig. 2 wash result compares
Detailed description of the invention
Abbreviation
AEO: AEO; TX: NPE; AES: sodium sulfate of polyethenoxy ether of fatty alcohol.
Raw material
AEO, TX-8, TX-10, AES, sodium sulphate, purchased from blue star auxiliary reagent factory, Xingtai; Bubble enemy (defoamer), purchased from Xinjiang DeLan Co., Ltd; The common raw material such as NaOH, potassium hydroxide is commercially available product.
The preparation of embodiment 1 alkaline cleaner of the present invention
Composition: NaOH 10wt%, AEO 5wt%, TX-85wt%, AES 5wt%, sodium sulphate 3wt%, natrium nitrosum 1wt%, ethanol 2wt%, bubble enemy 0.2wt%, finally add water 100wt%.
Compound method: first get a kind of alkali resistance container, be equipped with stirring arm above, pay the utmost attention to PP, PTFE.Each material is taken according to container volume and said ratio, first in an open-top receptacle (as plastic barrel), add solid base, as NaOH, then other solid kind components are added, after three-dimensional mixer or other mixing plants fully stir, pour in above-mentioned alkali resistance container, add a small amount of water and stir; In alkali resistance container, add liquid component in addition to water again, as AEO, AES, ethanol etc., this operation limit edged stirring must prevent caking or forms infusible precipitate, and finally add water constant volume, stirs.Namely alkaline cleaner of the present invention is obtained.
The preparation of embodiment 2 alkaline cleaner of the present invention
Composition: NaOH 10wt%, AEO 2wt%, TX-83wt%, AES 5wt%, sodium sulphate 8wt%, natrium nitrosum 0.5wt%, ethanol 1.5wt%, bubble enemy 0.1wt%, finally add water 100wt%.
Compound method: with embodiment 1.
The preparation of embodiment 3 alkaline cleaner of the present invention
Composition: NaOH 8wt%, AEO 2wt%, TX-83wt%, AES 5wt%, sodium sulphate 8wt%, natrium nitrosum 2wt%, ethanol 8wt%, bubble enemy 0.5wt%, finally add water 100wt%.
Compound method: with embodiment 1.
The preparation of embodiment 4 alkaline cleaner of the present invention
Composition: NaOH 10wt%, potassium hydroxide 10wt%, AEO 5wt%, TX-85wt%, 10wt%, sodium sulphate 10wt%, natrium nitrosum 3wt%, ethanol 10wt%, bubble enemy 1wt%, finally add water 100wt%.
Compound method: with embodiment 1.
The preparation of embodiment 5 alkaline cleaner of the present invention
Composition: potassium hydroxide 10wt%, AEO 1wt%, sodium sulphate 10wt%, natrium nitrosum 3wt%, ethanol 10wt%, bubble enemy 1wt%, finally add water 100wt%.
Compound method: with embodiment 1.
Below by the mode of experimental example, beneficial effect of the present invention is described:
The cleaning performance test of experimental example 1 alkaline cleaner of the present invention
The composition of alkaline cleaner: NaOH 10wt%, AEO 5wt%, TX-85wt%, AES5wt%, sodium sulphate 3wt%, natrium nitrosum 1wt%, ethanol 2wt%, bubble enemy 0.2wt%, finally add water 100wt%.Compound method is with embodiment 1.
1, experimental technique
Choose one group of NF membrane and be placed in purge tank, get 5 kilograms of alkaline cleaners of the present invention, dissolve, cleaning agent after dissolving is injected purge tank, its cleaning temperature 40 DEG C is heated to cleaning solution, wash cycles 40min at such a temperature, finally uses one-level RO water (water of counter-infiltration) rinsing membrane module again.
Because conventional organic pollution is generally based on protein-based, therefore this experiment expresses cleaning performance of the present invention with the clearance of protein.Get feed liquid, concentrate, water-dialyzing, cleaning agent recirculated water before and after cleaning respectively and carry out protein detection, according to the following formula, result calculates the clearance to protein.
Wherein: ω %: protein removal rate;
Α
1: alkaline cleaner recirculated water protein content, V
1: respective volume;
Α
2: feed liquid total protein content, V
2: cumulative volume;
Α
3: water-dialyzing protein content, V
3: respective volume;
Α
4: concentrate protein content, V
4: respective volume.
2, experimental result
| Sample ID | Alkaline cleaner recirculated water | Feed liquid | Concentrate | Water-dialyzing |
| Protein content (μ g/ml) | 683 | 519 | 348.3 | N/A |
Finally calculating single cleaning protein removal rate is 93.1%.
Experimental result illustrates, alkaline cleaner of the present invention can effective organics removal, and cleaning performance is excellent.
The cleaning performance of LC-90 alkaline cleaner of experimental example 2 alkaline cleaner of the present invention and Xiamen company and the contrast of cost
The preparation of alkaline cleaner of the present invention:
Composition: NaOH 6wt%, potassium hydroxide 2wt%, AEO 3wt%, TX-103wt%, AES 8wt%, sodium sulphate 2wt%, natrium nitrosum 1wt%, ethanol 1.5wt%, bubble enemy 0.2wt%, finally add water 100wt%.Preparation method is with embodiment 1.
One, cleaning performance compares
1, experimental technique
Test as follows in the 1-6 film group extracting workshop: produce several all after dates, (cleaning flux is 2 ~ 3m to treat to be reduced to pole low value by film group flux
3/ h) time, first adopt and clean with the LC-90 alkaline cleaner of Xiamen company; The several all after dates of regenerative ratio, (cleaning flux is 2 ~ 3m to treat to be reduced to pole low value by film group flux
3/ h) time, use alkaline cleaner of the present invention (being numbered B1) to clean, carry out longitudinal contrast.Repeat 4 times.
Single cleaning process: the cleaning agent after dissolving is injected purge tank, 40 DEG C is heated to cleaning solution, at such a temperature wash cycles 40min, finally uses one-level RO water rinsing membrane module again.
At the end of each cleaning, record cleans flux (m respectively
3/ h).
2, experimental result
As shown in Fig. 1 ~ 2: alkaline cleaner cleaning performance of the present invention is better than LC-90 alkaline cleaner, average cleaning flux exceeds LC-90 cleaning agent 0.6m
3/ h, exceeds about 5% relatively.
Two, cost compare is cleaned
The general selling price of alkaline membrane group cleaning agent of selling in the market is the price that 22-30 unit does not wait, and is generally 25 yuan/kilogram, and each cleaning consumption is 6 kilograms (LC-90 consumptions), and each film group single cleaning cost is about 150 yuan.
The present invention by cleaning agent mainly with other highly basic of technical grade for mainly to form, wherein NaOH is 2.5-3 unit per kilogram, potassium hydroxide is about 4-5 unit per kilogram, add other components, cleaning agent of the present invention amount to 8-10 unit/kilogram, the each use amount of each film group is 5 kilograms, and single cleaning cost is 40-50 unit.
Contrast can be found out, the cost of alkaline cleaner of the present invention is the 1/4-1/3 of LC-90 alkaline cleaner cost, and various abundant raw material source, price fluctuation is little.
Experimental result illustrates, compared with commercially available LC-90 alkaline cleaner, the cleaning performance of alkaline cleaner of the present invention is better, and cost is low all the better.
To sum up, alkaline cleaner of the present invention effectively except organic matter on striping, can recover the permeability of film, and with low cost, and prospects for commercial application is good.
Claims (12)
1. an alkalescence cleaning agents of membrane, is characterized in that: it comprises the component of following percentage:
Inorganic base 5-30wt%, surfactant 1-20wt%, builder 0-10wt%, film protective agent 0.5-3wt%, alcohol ether solvent 0-10wt%, defoamer 0-1wt%, all the other are water.
2. alkaline membrane cleaning agent according to claim 1; it is characterized in that: it comprises the component of following percentage: inorganic base 8-10wt%; surfactant 10-15wt%; builder 2-8wt%; film protective agent 0.5-2wt%; alcohol ether solvent 1.5-8wt%, defoamer 0.1-0.5wt%, all the other are water.
3. alkaline membrane cleaning agent according to claim 1, is characterized in that: it comprises the component of following percentage: inorganic base 8-10wt%, surfactant 14-15wt%; builder 2-3wt%, film protective agent 1wt%, alcohol ether solvent 1.5-2wt%; defoamer 0.2wt%, all the other are water.
4. the alkaline membrane cleaning agent according to claims 1 to 3 any one, is characterized in that: described inorganic base is NaOH and/or potassium hydroxide.
5. the alkaline membrane cleaning agent according to claims 1 to 3 any one, is characterized in that: described surfactant is one or more in AEO, TX series of surfactants, AES.
6. alkaline membrane cleaning agent according to claim 5, is characterized in that: described TX series of surfactants is TX-8 or TX-10.
7. the alkaline membrane cleaning agent according to claims 1 to 3 any one, is characterized in that: described builder is one or more in sodium phosphate trimer, sodium metasilicate, sodium sulphate and Sodium Polyacrylate.
8. the alkaline membrane cleaning agent according to claims 1 to 3 any one, is characterized in that: described film protective agent is mainly adsorbed film type corrosion inhibiter and/or type oxide film corrosion inhibiter.
9. alkaline membrane cleaning agent according to claim 8, is characterized in that: described type oxide film corrosion inhibiter is natrium nitrosum.
10. the alkaline membrane cleaning agent according to claims 1 to 3 any one, is characterized in that: described alcohol ether solvent is one or more in ethylene glycol, methyl alcohol, ethanol, propandiol butyl ether, butyl glycol ether and triethylene glycol butyl ether.
11. alkaline membrane cleaning agents according to claims 1 to 3 any one, is characterized in that: described defoamer is polyethers defoamer.
Described in 12. claim 1 ~ 11 any one, the preparation method of alkaline membrane cleaning agent, is characterized in that: it comprises the steps:
A () gets raw material according to the proportioning described in claims 1 to 3 any one;
B () adds other solid materials in inorganic base, mixing, then adds water and stir;
C () under agitation, adds liquid charging stock than water, add water constant volume, stirs.
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| CN105709605A (en) * | 2015-08-13 | 2016-06-29 | 常州联江环保科技有限公司 | Alkaline cleaning agent and bactericide applicable to ultra-filtration membranes or reverse osmosis membranes |
| CN107261854A (en) * | 2017-08-09 | 2017-10-20 | 广州环投环境服务有限公司 | A kind of cleaning method for the film being used in percolate treating process |
| CN109012212A (en) * | 2018-06-27 | 2018-12-18 | 三达膜科技（厦门）有限公司 | A kind of Ultrafiltration membrane after-treatment modification method |
| CN110354688A (en) * | 2019-06-14 | 2019-10-22 | 宁波大学 | A kind of cleaning agent and its cleaning method for polyacrylamide polluted membrane |
| CN110585929A (en) * | 2019-09-10 | 2019-12-20 | 深圳市长隆科技有限公司 | Special cleaning agent for membrane sulfide pollution |
| CN115041023A (en) * | 2021-07-16 | 2022-09-13 | 肇庆领誉环保实业有限公司 | Efficient membrane cleaning agent and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110585929A (en) * | 2019-09-10 | 2019-12-20 | 深圳市长隆科技有限公司 | Special cleaning agent for membrane sulfide pollution |
| CN115041023A (en) * | 2021-07-16 | 2022-09-13 | 肇庆领誉环保实业有限公司 | Efficient membrane cleaning agent and preparation method thereof |
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Application publication date: 20150408 |