CN1023793C - Polysilicate flocculant and preparing process thereof - Google Patents
Polysilicate flocculant and preparing process thereof Download PDFInfo
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- CN1023793C CN1023793C CN 90108702 CN90108702A CN1023793C CN 1023793 C CN1023793 C CN 1023793C CN 90108702 CN90108702 CN 90108702 CN 90108702 A CN90108702 A CN 90108702A CN 1023793 C CN1023793 C CN 1023793C
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- flocculating agent
- water
- polysilicate
- slag
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Abstract
The present invention relates to a polysilicate flocculating agent and a preparing method thereof, and the liquid of the polysilicate flocculating agent comprises 4.5 to 5.5% of SiO2, 1.2 to 4.4% of Al2O3, smaller than 0.2% of Fe, 3.0 to 3.5% of Ca, smaller than 1.0% of Mg, 6.0 to 8.5% of Cl<-> and smaller than 7.5% of SO4<-2>. The pH of the liquid of the polysilicate flocculating agent is from 1.8 to 2.2. The solid of the polysilicate flocculating agent is a product comprising 30 to 40% of water, and the product is obtained by drying the liquid of the polysilicate flocculating agent at the temperature of lower than 80 DEG C. The polysilicate flocculating agent uses water slag as main raw materials, the water slag is dissolved by hydrochloric acid or/and sulfuric acid at normal temperature and under normal pressure, residue is filtered off, a polymerization ripening process lasts for 3 to 6 hours, and then the polysilicate flocculating agent is obtained by regulating a pH value to about 2. The liquid of the polysilicate flocculating agent can be stored for 20 to 30 days without the generation of gel, the solid of the polysilicate flocculating agent can be stored for a long term, and the solid of the polysilicate flocculating agent can be still used as a water purifying agent after pulverization and dissolution even if the solid of the polysilicate flocculating agent is slightly polymerized. The water purifying effect of the polysilicate flocculating agent is superior to that of aluminum sulfate, and the present invention has the advantages of low cost and simple operation.
Description
The present invention relates to a kind of preparation method who handles with flocculation agent, particularly the preparation method of polysilicate mixture flocculation agent.
In water treatment, remove impurity and suspended state dispersed substance with flocculation agent, the flocculation agent that adopts has Tai-Ace S 150, iron trichloride, other low-molecular inorganic flocculation agent, polymerize aluminum chloride, polymeric silicicacid and other inorganic polymer flocculant, polyacrylamide and other organic polymer flocculation agent.
The Tai-Ace S 150 flocculation agent is inexpensive, but aggregation velocity is low, and the floss of formation is little, and when handling water at low temperature, congregation is carried out insufficiently.Can reduce basicity greatly with Tai-Ace S 150, must use with a large amount of alkali electroless medicines or other coagulant aids.
The iron trichloride treating water can form big floss, forms effective co-precipitation with heavy metal ion, but iron trichloride corrodibility height, and it stable low needs and white lime uses together, can produce a large amount of mud.
The polymerize aluminum chloride force of flocculation is strong, even in water at low temperature, the formation speed of floss is also very fast, thereby be widely adopted, shortcoming is that polymerize aluminum chloride is produced raw materials used composition complexity, process is long, the difficult control of condition, be difficult to obtain the identical product of polymerizing power, price is also more expensive.
Though bodied ferric sulfate effect height, bigger to equipment corrosion, investment is many, the difficult control of water quality.
CN87101246A has introduced Japanese a kind of water treatment method and flocculation agent, it adopts high-polymeric silicic acid and little metal salt to use together, silicic acid after tart metal-salt and the polymerization is mixed in acidic solution, mix in basic solution with the silicic acid after the metal-salt of alkalescence and the polymerization, the advantage of this flocculation agent is that extremely strong ability of aggregation is arranged in water at low temperature, the comparable conventional processing expense of water treatment expense is low, but because of polymeric silicicacid water glass is produced, limited by raw material, difficult scale operation, and polymeric silicicacid and metal-salt production respectively, storage, transportation and use are all than trouble, and inconvenience is promoted.Become the polymeric silicicacid of gel in addition, can not be used as flocculation agent again.
Polyacrylamide and other organic polymer flocculation agent can form bigger floss with fast speeds.But the water that the shortcoming of organic floculant be cannot say for sure to demonstrate,prove after the processing is always safe and harmless.
The previous Chinese patent application of submitting to of the inventor numbers 90107193.5 has been introduced a kind of polymeric silicate liquid flocculating agent and preparation method.It is a main raw material with blast furnace water slag, or join small amount of aluminum, bauxitic clay, iron, zinc, and molten with the acid of hydrochloric acid substep at normal temperatures and pressures, the slaking polymerization, make pH value 2 left and right sides liquid, the polysilicate flocculant preservation period reaches 20-30 days, and purifying water effect is good, and cost is low, simple to operate, this method is limited to hydrochloric acid acid molten, and the liquid flocculation agent only should use nearby, otherwise the freight charges height is uneconomical.
The objective of the invention is to overcome the shortcoming of above-mentioned flocculation agent and preparation, study the advantage of its flocculation agent of not only having CN90107193.5 and being introduced of preparation method of a kind of new flocculation agent, raw materials for production are easy to get, cost is low, purifying water effect is good, and production method is simple, and available other mineral acid is produced, product can be the solid of transportation, preservation, also is fit to the liquid that uses nearby.
Realize that purpose technical measures of the present invention are is main raw material with blast furnace water slag, in case of necessity with addition of small amount of aluminum or iron, bauxitic clay, remove iron block through screening, behind the impurity such as cinder, need not pulverize, under normal temperature and pressure, with hydrochloric acid or/and sulfuric acid solution, polymerization, the elimination insolubles, the polysilicate filtrate that obtains, PH1.5-4.0, polymerization slaking 3-6 hour is adjusted about pH value to 2 with hydrochloric acid or sulfuric acid then, promptly obtains the liquid flocculation agent, this flocculation agent preservation period reaches 20-30 days, and cryodrying becomes solid promptly to obtain the polysilicate solid flocculation agent of energy prolonged preservation.
Used blast furnace water slag composition weight %, SiO
225-35, Al
2O
38-18, CaO35-45, Mg2.5-5.0, MnO0.5-3.0, FeO0.5-2.0, S0.5-1.5.
Slag and hydrochloric acid add that 30% hydrochloric acid 1-1.67 rises or 0.4 liter in 98% sulfuric acid or/and the vitriolic consumption is every Kg slag, or 0.04 liter in 98% sulfuric acid and 30% hydrochloric acid 1.4-1.9 liter.
Preparation process is to add certain water gaging earlier in container, once or in batches join in the container by above-mentioned slag and acid amount again, and constantly stir, the control pH value is at 1.5-4.0, behind the filter cleaner, filtrate slaking 3-6 hour, adjust pH value to 1.8-2.2 with sulfuric acid or hydrochloric acid, promptly get stable polysilicate mixture liquid flocculation agent, it is dried to solid gets the solid flocculant product under＜80 ℃, but prolonged preservation gets final product with water dissolution during use.
As need during with addition of small amount of aluminum, iron, bauxitic clay, can with the water slag and aluminium, iron, bauxitic clay use sulfuric acid respectively or/and hydrochloric acid acid is molten, mix then, the acidity of mixed solution also is controlled at PH1.5-4.0, below technology with single identical during with slag.
With the polysilicate mixture flocculation agent liquid major ingredient of this law preparation outer SiO that contains that dewaters
24.5-5.5%, Al
2O
31.2-4.0%, Fe＜0.2%, Ca3.0-3.5%, Cl
-6.0-8.5%, SO
4＜7.5%, Mg＜1%, PH1.8-2.2, this flocculation agent are deposited 20-30 days not gels.After＜80 ℃ of following dryings, get the polysilicate mixture flocculation agent solid phase prod of moisture about 30-40%.
This flocculation agent compares as table 1 with the Tai-Ace S 150 purifying water effect.
The purifying water effect of this flocculation agent of table 1 and Tai-Ace S 150
The turbidity of dispensing water gaging changes
Name of product
The former water of mg/l water 20 minutes 30 minutes
Tai-Ace S 150 50 780 50 20
Product 50 780 10＜5 of the present invention
Tai-Ace S 150 25 500 60 25
Product 25 500 15＜5 of the present invention
Former water PH7.4,20 ℃ of water temperatures
Embodiment 1 dissolving with hydrochloric acid method
Add 30% hydrochloric acid 150ml in the container that fills 400ml water, gradation adds entry slag 90g, temperature of reaction be lower than 40 ℃ and constantly stir under about reaction half an hour, when PH filters during at 3.0-3.2, filtrate slaking 3-6 hour, contain SiO in this liquid
25.5%, Al
2O
32.0%, Fe＜0.2%, Ca3.5%, Mg＜1%, Cl
-8.2%, this liquor is preserved 3-4 days not gels, adjusts about pH value to 1.8 with 5% sulfuric acid, gets product, and this product is preserved 20-30 days not gels.
Embodiment 2 sulfuric acid dissolution methods
Add 98% sulfuric acid 22ml in the container that fills 400ml water, gradation adds entry slag 55g, constantly stirs, controls solvent temperature and be lower than 40 ℃, when PH filters to 1.8 the time, contains SiO in the liquor of polymerization after 6 hours
25.3%, Al
2O
31.5%, Fe＜0.2%, Mg＜1%, Ca3.1%, SO
47.2%, finished product can be preserved 20-30 days, do not influence purifying water effect if there is precipitation to shake up, but supernatant liquor was poorer slightly than sinking liquid purifying water effect.
Embodiment 3 sulfuric acid+dissolving with hydrochloric acid method
In the container that fills 400ml water, add 98% sulfuric acid 3.5ml respectively, 30% hydrochloric acid 150ml, gradation adds entry slag 80g altogether, and controlled temperature is no more than 50 ℃, reaction after-filtration half an hour, filtrate polymerization were adjusted pH value to＜2.2 with 5% sulfuric acid after 4 hours under constantly stirring, and contained SiO in this liquor
25.4%, Al
2O
31.6%, Fe＜0.2%, Ca3.0%, Cl
-7.0%, SO
41.2%, Mg＜1.0%.This finished product is preserved 20-30 days not gels.
Embodiment 4 hydrochloric acid+sulphuric acid segmentation dissolution methods
Add 98% sulfuric acid 1ml, 30% hydrochloric acid 30ml in the container that fills 400ml water, add entry slag 17.5g, normal-temperature reaction was filtered in 6 hours.
Add 98% sulfuric acid 0.5ml in above-mentioned filtrate, 30% hydrochloric acid 20ml, water slag 17.5mlg, normal temperature reaction down filtered in 6 hours.
In the filtrate in above-mentioned the 2nd step, add 98% sulfuric acid 0.5ml, 30% hydrochloric acid 20ml, water slag 17.5g normal temperature is 6 hours after-filtration of reaction down, and gained filtrate is adjusted pH value with sulfuric acid or salt and is polysilicate mixture liquid flocculation agent to 1.8-2.0, record to contain SiO in the solution
25.3%, Al
2O
31.2%, Fe＜0.2%, Ca3.7%, Cl
-7.5%, SO
40.6%, Mg＜1%.
Embodiment 5 sour molten aluminium+sour molten water slag method
1, the hydrochloric acid 50ml of adding 30% in the container that fills 100ml water, gradation adds aluminium bits 5g, till reacting completely.
2, in the container that fills 300ml water, 30% hydrochloric acid 100ml, gradation adds entry slag 50g, reacts half an hour.
3, with the liquid-phase mixing in 1,2 steps, stir while mixing, add the about 50g of entry slag then, filter when controlling pH value to 3.8-4.0, filtrate slaking 4 hours contains SiO in the gained liquor
24.5%, Al
2O
34.0%, Fe＜0.2%, Ca3.2%, Cl6.2%, Mg＜1%, but the long period preserve, can preserve the moisture 30-40% weight of solid phase prod over a long time as being dried to solid under＜80 ℃.
Embodiment 1,2,3,4 liquid products all can be dried to moisture 30-40% solid being lower than under 80 ℃, pulverize a little during use, and being dissolved in water then gets final product.Even slight gelling polymerization after the pulverizing water dissolution, still can be made water purification agent and use.
Under 20 ℃, purifying water effect and Tai-Ace S 150 purifying water effect are relatively as table 2 during PH7.4 with embodiment 1,2,3,4,5 gained flocculation agents.
Table 2
The dosage water turbidity changes
Water purification agent
The former water of mg/l water 20 minutes 30 minutes
Tai-Ace S 150 25 500 60 25
Embodiment 1 product 25 500 12＜5
Embodiment 2 products 25 500 15＜5
Embodiment 3 products 25 500 8＜5
Embodiment 4 products 25 500 6＜5
Embodiment 5 products 25 500 5＜5
Purified waste water 30 minutes with this flocculation agent, dosage 30ml/l water, 20 ℃ of temperature, its water quality routine analysis of purifying waste water the results are shown in table 3.
Table 3
Purificating raw water water before project purifies
The color khaki color is colourless
Turbidity 500＜5
PH value 7.4 7.3
Total hardness 95.5 98.0
Muriate mg/l 7.6 8.0
Total Fe mg/l 0.38 0.05
Mn mg/l 0 0
Zn mg/l 0 0
Cu mg/l 0.13 0.007
Pb mg/l 0 0
AS mg/l 0 0
Cr mg/l 0 0
Cd mg/l 0 0
Hg mg/l 0 0
Prussiate mg/l 00
Fluorochemical mg/l 0.22 0.12
By table 3 data as seen, with the flocculation agent water purification of this law preparation, purify back water quality and meet drinking water standard fully.
Claims (1)
1, a kind of method for preparing the polysilicate flocculant mixture is SiO with major ingredient %
225-35, CaO35-45, Al
2O
38-18, Mg2.5-5.0, MaO0.5-3.0, Fe0.5-2.0, the blast furnace water slag of S0.5-1.5 is a raw material, or with addition of small amount of aluminum, iron, bauxitic clay, slag is removed iron block, cinder impurity, water and hydrochloric acid are or/and the dissolving down of sulfuric acid normal temperature and pressure, polymerization, and constantly stir, the elimination insolubles, slaking 3-6 hour, adjust the pH value to 1.8-2.2, get liquid polymeric silicic acid-salt mixture flocculation agent, it is characterized in that the water slag does not need fragmentation, the 1Kg slag is with 30% hydrochloric acid 1.0-1.67 liter, or 0.4 liter in 98% sulfuric acid, or 98% 0.04 liter in sulfuric acid and 30% hydrochloric acid 1.4-1.9 liter, control pH value was adjusted the liquid flocculation agent that the pH value gets to 1.8-2.2 to 1.5-4.0 when acid was molten after the filtrate slaking, was dried to the solid flocculant product of moisture 30-40% weight under＜80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108702 CN1023793C (en) | 1990-10-28 | 1990-10-28 | Polysilicate flocculant and preparing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108702 CN1023793C (en) | 1990-10-28 | 1990-10-28 | Polysilicate flocculant and preparing process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050708A CN1050708A (en) | 1991-04-17 |
| CN1023793C true CN1023793C (en) | 1994-02-16 |
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ID=4881098
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90108702 Expired - Fee Related CN1023793C (en) | 1990-10-28 | 1990-10-28 | Polysilicate flocculant and preparing process thereof |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396611C (en) * | 2001-05-25 | 2008-06-25 | 德山株式会社 | Process for producing floccalating agent using for water treatment |
| CN101497469B (en) * | 2009-03-11 | 2011-02-16 | 济南大学 | Method for preparing inorganic polymer composite aluminum iron zinc coagulant from aluminum plating zincilate |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095442C (en) * | 1998-07-28 | 2002-12-04 | 周毅 | Active polysilicate flocculating agent and preparation method thereof |
| CN107416955A (en) * | 2017-05-31 | 2017-12-01 | 成都原端新材料科技有限公司 | A kind of denitrifier and preparation method thereof |
| CN109250795B (en) * | 2018-09-21 | 2022-06-24 | 六盘水师范学院 | Method for rapidly preparing poly-silicate aluminum ferric sulfate by one-pot microwave radiation method |
-
1990
- 1990-10-28 CN CN 90108702 patent/CN1023793C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396611C (en) * | 2001-05-25 | 2008-06-25 | 德山株式会社 | Process for producing floccalating agent using for water treatment |
| CN101497469B (en) * | 2009-03-11 | 2011-02-16 | 济南大学 | Method for preparing inorganic polymer composite aluminum iron zinc coagulant from aluminum plating zincilate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1050708A (en) | 1991-04-17 |
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