CN1837341A - Cleaning agent for ceramic film and its preparation method - Google Patents
Cleaning agent for ceramic film and its preparation method Download PDFInfo
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- CN1837341A CN1837341A CN 200610038865 CN200610038865A CN1837341A CN 1837341 A CN1837341 A CN 1837341A CN 200610038865 CN200610038865 CN 200610038865 CN 200610038865 A CN200610038865 A CN 200610038865A CN 1837341 A CN1837341 A CN 1837341A
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- alkyl benzene
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Abstract
The invention discloses a ceramic film abluent and preparing method, which comprises the following parts: 50-75 percent NaOH, 3-15 percent sodium polyphosphate, 5-15 percent sodium alkyl benzene sulphonate, 2-8 percent diatomite, 1-8 percent liquid glass, 0-5 percent sodium sulfate, 0-20 percent sodium carbonate, 0-5 percent methylol cellulose and 0-5 percent ethylene diamine tetraacetic acid tetrasodium salt. These components are added int the stirring and grinding corrosion-proof reactor sequently, which is stirred and grinded evenly at room temperature at 4-8 h to obtain the product. The invention shortens the system cleaning time and reduces the system consumption, which doesn't damage ceramic film.
Description
Technical field
The present invention relates to a kind of clean-out system that is applicable to ceramic membrane, particularly a kind of clean-out system that is applicable to the cleaning of the ceramic membrane that filters oil alkali refining waste water, steel rolling emulsion, metal cutting waste water.
Background technology
Alkali refining is an operation in the oil refining process process, domestic grease factory generally adopts intermittent type and two kinds of production technique of continous way, promptly pass through in the alkali and the generation of the free fatty acids in grease soap stock, other impurity of absorbed portion centrifugation from oil simultaneously, thereby the refining of realization crude oil.The washes amount of discharging in washing process is approximately 100～150kg/t.Washes contains impurity such as oil, soap, suspended substance, wherein oil-contg have up to 1～3%.
Can effectively reclaim oil in the washes with ceramic membrane, washes through behind the inorganic membrane filtration because the separated eliminating of impurity, COD total values such as overwhelming majority oil, soap descend more than 80%.
The steel rolling emulsifying liquid waste water is a kind of oily(waste)water that Steel Mill produces, and emulsion mainly is made up of 2～10% mineral oil or vegetables oil, a large amount of anionic or the emulsifying agent and the water of non-ionic type, and wastewater flow rate is very big.
With the ceramic membrane separation method mainly is that effluent quality is good by the effectively catching of film to oil droplet and suspended particles, and oil-contg is less than 10ppm.
In Metal Production, processing and use in order to remove the grease of metallic surface; often adopt alkaline liquid scavenging solution or semiliquid scavenging solution; usually have materials such as water, alkali, tensio-active agent and microbial inoculum in the cleaner for metal; directly get rid of the meeting serious environment pollution, make general water treatment method be difficult to obtain the ideal effect owing to wherein contain a large amount of mineral oil and amount of surfactant.By the processing of ceramic membrane, cleaner for metal is by suitable additional recyclable utilization, economic benefit height.
All belong to oily(waste)water in oil alkali refining waste water, steel rolling emulsion and the metal cutting waste water, handle through ceramic membrane, the membrane contaminant of its generation mainly contains soap stock, grease, protein, mineral oil, emulsifying agent and some impurity.Therefore clean and suitable purging method very important, inappropriate cleaning can cause the regeneration difficulty of film, the lengthening of recovery time.
The purging method of existing ceramic membrane has two kinds of physical method and chemical processes.More serious when the film damage ratio, when adopting the physical method poor effect, need to clean with chemical.
The common chemical clean-out system has following several:
1. acid solution (stronger, more weak as lactic acid) as H3PO4;
2. alkali lye (as NaOH);
3. tensio-active agent (ion or non-ionic type);
4. enzyme (proteolytic enzyme, amylase, glucolase);
5. sterilizing agent (H2O2 and NaOCl);
6. Synergist S-421 95 (EDTA, polyacrylate, Sodium hexametaphosphate 99)
These clean-out systems both can use separately, also can array configuration use.Inorganic acid makes that a part of insoluble substance becomes soluble substance in the pollutent; Organic acid is mainly removed the deposition of inorganic salt; Strong oxidizer and highly basic are the pollutions of removing grease and biological substances such as albumen, algae; Tensio-active agent is mainly removed organic pollutant; And, adopt the enzyme clean-out system for pollution systems such as cell debriss more.Synergist S-421 95 can generate the big material of solubleness with the mineral ion complexing in the pollutent, reduces the long-pending salt of film surface and inner hole deposition and the inorganic pollutant of absorption.
In the film industry, traditional purging method is that soda acid alternately cleans, and for polluting very serious film, adopts strong acid, highly basic alternately to clean usually, and adds oxygenant and tensio-active agent such as clorox.For above three kinds of oily(waste)waters, film pollutes very serious, and consuming time too many by above these methods cleanings, scavenging period is long and cleaning strength is excessive, not only can the life-span of film be impacted, and also can incur loss through delay production, causes damage.
Summary of the invention
The present invention will solve is exactly the defective that above-mentioned prior art exists, for people provide a kind of ceramic membrane cleaning agent that the ceramic membrane that is used to filter three kinds of oily(waste)waters such as oil alkali refining waste water, steel rolling emulsion and metal cutting waste water is effectively cleaned.
The present invention is mixed by following compositions in weight percentage:
Weight percentages of components
A, sodium hydroxide 50～75%
B, sodium polyphosphate 3～15%
C, sodium alkyl benzene sulfonate 5～15%
D, diatomite 2～8%
E, water glass 1～8%
F, sodium sulfate 0～5%
G, yellow soda ash 0～20%
H, this Mierocrystalline cellulose of methylol 0～5%
I, tetrasodium salt of EDTA 0～5%
Preparation method of the present invention is: in the corrosion resistant reactor that a band stirs and grinds, above-mentioned each component is added successively by row name order, at room temperature stirred 4～8 hours, grind evenly, get product.
The more traditional clean-out system of clean-out system of the present invention has following some advantage:
1, lowers the concentration polarization on film surface greatly, reduced the cleaning frequency of film.
2, recover the filtration flux of ceramic membrane effectively and quickly, quickened the regeneration of system.
3, shorten the scavenging period of system, greatly reduced the energy consumption of system.
4, to the harmless effect of ceramic-film tube, the ceramic-film tube after the cleaning is pressed, resisted folding, acid-alkali-corrosive-resisting performance test through bubble, and is approaching with original test data numerical value.
Embodiment
Embodiment 1
Preferentially be used to handle the better formula following (weight percent) of clean-out system of the present invention of cleaning of the ceramic membrane of alkali refining waste water:
A, sodium hydroxide 55%
B, sodium polyphosphate 10%
C, sodium alkyl benzene sulfonate 12%
D, diatomite 2.5%
E, water glass 2%
F, sodium sulfate 1%
G, yellow soda ash 15%
H, Walocel MT 20.000PV 2%
I, tetrasodium salt of EDTA 0.5%
Preparation method: in the corrosion resistant reactor that a band stirs and grinds, add sodium hydroxide, sodium polyphosphate, sodium alkyl benzene sulfonate, diatomite, water glass, sodium sulfate, yellow soda ash, Walocel MT 20.000PV and tetrasodium salt of EDTA successively, at room temperature stirred 4～8 hours, grind evenly, be granular clean-out system of the present invention.
Embodiment 2
Preferentially be used to handle another better formula following (weight percent) of clean-out system of the present invention of cleaning of the ceramic membrane of alkali refining waste water:
A, sodium hydroxide 62%
B, sodium polyphosphate 5%
C, sodium alkyl benzene sulfonate 12%
D, diatomite 3%
E, water glass 3%
G, yellow soda ash 15%
Preparation method: in the corrosion resistant reactor that a band stirs and grinds, add sodium hydroxide, sodium polyphosphate, sodium alkyl benzene sulfonate, diatomite, water glass and yellow soda ash successively, at room temperature stirred 4～8 hours, and ground evenly, be granular clean-out system of the present invention.
Embodiment 3
Preferentially be used to handle the better formula following (weight percent) of clean-out system of the present invention of cleaning of the ceramic membrane of cold-rolling emulsion:
A, sodium hydroxide 50%
B, sodium polyphosphate 12%
C, sodium alkyl benzene sulfonate 10%
D, diatomite 6%
E, water glass 3%
F, sodium sulfate 2%
G, yellow soda ash 15%
H, Walocel MT 20.000PV 2%
Preparation method: in the corrosion resistant reactor that a band stirs and grinds, add sodium hydroxide, sodium polyphosphate, sodium alkyl benzene sulfonate, diatomite, water glass, sodium sulfate, yellow soda ash and Walocel MT 20.000PV successively, at room temperature stirred 4～8 hours, grind evenly, be granular clean-out system of the present invention.
Embodiment 4
Preferentially be used to handle another better formula following (weight percent) of clean-out system of the present invention of cleaning of the ceramic membrane of cold-rolling emulsion:
A, sodium hydroxide 68%
B, sodium polyphosphate 10%
C, sodium alkyl benzene sulfonate 9%
D, diatomite 2%
E, water glass 2%
G, yellow soda ash 9%
Preparation method: in the corrosion resistant reactor that a band stirs and grinds, add sodium hydroxide, sodium polyphosphate, sodium alkyl benzene sulfonate, diatomite, water glass and yellow soda ash successively, at room temperature stirred 4～8 hours, and ground evenly, be granular clean-out system of the present invention.
Embodiment 5
Preferentially be used to handle the better formula following (weight percent) of clean-out system of the present invention of cleaning of the ceramic membrane of metal cutting waste water:
A, sodium hydroxide 70%
B, sodium polyphosphate 8%
C, sodium alkyl benzene sulfonate 9%
D, diatomite 3%
E, water glass 3%
G, yellow soda ash 4%
I, tetrasodium salt of EDTA 3%
Preparation method: in the corrosion resistant reactor that a band stirs and grinds, add sodium hydroxide, sodium polyphosphate, sodium alkyl benzene sulfonate, diatomite, water glass, yellow soda ash and tetrasodium salt of EDTA successively, at room temperature stirred 4～8 hours, grind evenly, be granular clean-out system of the present invention.
The application method of forming by embodiment 1,2,3,4,5 prescription with the clean-out system of the present invention of preparation method's production:
1. emptying feed liquid is cleaned 5min with hot water (60 ℃).
2. join 1～2% cleaning dosage of the present invention, 60 ℃ of temperature are cleaned 30min.
3. emptying is with hot water (60 ℃) rinsing 5min.
4. 2% nitric acid cleans 30min, 60 ℃ of temperature.
5. emptying is with hot water (60 ℃) rinsing 5min
6. emptying is stand-by
By above step, can recover flux substantially, cleaning process also very effective and also be easy to control.
By replacing purging method with traditional soda acid, and strong acid and strong base alternately cleans, and add the purging method of oxidant content and tensio-active agent and adopt clean-out system of the present invention, replace the purging method repetition test relatively in conjunction with nitric acid simultaneously, find to adopt clean-out system of the present invention on scavenging period and flux recovery situation, very large advantage to be arranged.
Following table is this employing embodiment of the invention 2 or 3 described clean-out systems and the technical feature contrast table that adopts prior art cleaning ceramic film:
| Purging method | Soda acid alternately cleans | Soda acid alternately cleans, and adds oxygenant and tensio-active agent | The embodiment of the invention 2 or 3 clean-out system alternately clean with acid |
| Scavenging period (min) | 182 | 100 | 60 |
| Flux recovers (%) | 96.5 | 96.5 | 99.9 |
Claims (10)
1, a kind of ceramic membrane cleaning agent is characterized in that being mixed by following compositions in weight percentage:
Weight percentages of components
A, sodium hydroxide 50～75%
B, sodium polyphosphate 3～15%
C, sodium alkyl benzene sulfonate 5～15%
D, diatomite 2～8%
E, water glass 1～8%
F, sodium sulfate 0～5%
G, yellow soda ash 0～20%
H, this Mierocrystalline cellulose of methylol 0～5%
I, tetrasodium salt of EDTA 0～5%.
2, ceramic membrane cleaning agent as claimed in claim 1 is characterized in that being mixed by following compositions in weight percentage:
Weight percentages of components
A, sodium hydroxide 55%
B, sodium polyphosphate 10%
C, sodium alkyl benzene sulfonate 12%
D, diatomite 2.5%
E, water glass 2%
F, sodium sulfate 1%
G, yellow soda ash 15%
H, Walocel MT 20.000PV 2%
L, tetrasodium salt of EDTA 0.5%.
3, ceramic membrane cleaning agent as claimed in claim 1 is characterized in that being mixed by following compositions in weight percentage:
Weight percentages of components
A, sodium hydroxide 62%
B, sodium polyphosphate 5%
C, sodium alkyl benzene sulfonate 12%
D, diatomite 3%
E, water glass 3%
G, yellow soda ash 15%.
4, ceramic membrane cleaning agent as claimed in claim 1 is characterized in that being mixed by following compositions in weight percentage:
Weight percentages of components
A, sodium hydroxide 50%
B, sodium polyphosphate 12%
C, sodium alkyl benzene sulfonate 10%
D, diatomite 6%
E, water glass 3%
F, sodium sulfate 2%
G, yellow soda ash 15%
H, Walocel MT 20.000PV 2%.
5, ceramic membrane cleaning agent as claimed in claim 1 is characterized in that being mixed by following compositions in weight percentage:
Weight percentages of components
A, sodium hydroxide 68%
B, sodium polyphosphate 10%
C, sodium alkyl benzene sulfonate 9%
D, diatomite 2%
E, water glass 2%
G, yellow soda ash 9%.
6, ceramic membrane cleaning agent as claimed in claim 1 is characterized in that being mixed by following compositions in weight percentage:
A, sodium hydroxide 70%
B, sodium polyphosphate 8%
C, sodium alkyl benzene sulfonate 9%
D, diatomite 3%
E, water glass 3%
G, yellow soda ash 4%
I, tetrasodium salt of EDTA 3%.
7, claim 2 or 3 described clean-out systems are used to filter the purposes of cleaning of the ceramic membrane of alkali refining waste water.
8, claim 4 or 5 described clean-out systems are used to filter the purposes of cleaning of the ceramic membrane of cold-rolling emulsion.
9, the described clean-out system of claim 6 is used for the purposes of cleaning of the ceramic membrane of filtering metal cutting waste water.
10, the preparation method of any described ceramic membrane film clean-out system of claim 1-6, it is characterized in that in the corrosion resistant reactor that a band stirs and grinds, row name order by the listed component of each claim adds each component successively, at room temperature stirred 4～8 hours, grind evenly, get product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100388652A CN100404657C (en) | 2006-03-15 | 2006-03-15 | Cleaning agent for ceramic film and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100388652A CN100404657C (en) | 2006-03-15 | 2006-03-15 | Cleaning agent for ceramic film and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1837341A true CN1837341A (en) | 2006-09-27 |
| CN100404657C CN100404657C (en) | 2008-07-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100388652A Expired - Fee Related CN100404657C (en) | 2006-03-15 | 2006-03-15 | Cleaning agent for ceramic film and its preparation method |
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