CN1039002C - Magnesium ion containing flocculating agents for waste water treatment and method for preparation thereof - Google Patents
Magnesium ion containing flocculating agents for waste water treatment and method for preparation thereof Download PDFInfo
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- CN1039002C CN1039002C CN95105943A CN95105943A CN1039002C CN 1039002 C CN1039002 C CN 1039002C CN 95105943 A CN95105943 A CN 95105943A CN 95105943 A CN95105943 A CN 95105943A CN 1039002 C CN1039002 C CN 1039002C
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- magnesium ion
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- coagulating agent
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Abstract
The present invention relates to a composite magnesium salt coagulating agent for water treatment, which is composed of magnesium salt, organic polymeric flocculants, magnesium hydroxide and other impurities. The present invention also relates to a method for preparing the composite magnesium salt coagulating agent, which comprises the steps of condensation, impurity removal, organic flocculant incorporation, packaging and dry packaging. Because the present invention adopts waste as raw materials for preparing the coagulating agent, the price is low. During coagulating agent preparation, the treatment is regarded as bittern or brine of the waste. Generated floccules are compact and are easily dewatered. During use, when suspended matter is removed, partial organic matter and heavy metal can also be removed. The present invention has the advantages of simple preparation and use, and easy popularization.
Description
The present invention relates to the preparation method of a kind of water treatment with magnesium ion containing flocculating agents for waste, it can be used for the chemical treatment of water, in particular for the purifying treatment of trade effluent and sanitary sewage,, reduce disadvantageous effect to environment so that its treated water satisfies sewage drainage standard.More particularly, the invention particularly relates to the preparation method who adopts depleted bittern and bittern to make the magnesium ion containing flocculating agents for waste that raw material produces.
At present, the method of producing coagulating agent is a lot, Chinese patent 89107966.1 (open and CN1051157A) discloses a kind of method of producing composite macromolecule coagulant, and what this method adopted is industrial aluminum sulphate, industrial calcium chloride, industry refining calcium hydroxide, powdered carbon and cationic-type polyacrylamide.But the raw material of these employings does not all belong to the waste of industry but the finished product raw material of industry also will use a large amount of strong acid.
Another part Chinese patent application No. 92115310.4 (publication number is CN1089239A) also discloses a kind of manufacture method of efficient flocculating emulsion, and this method is a raw material with kaolin, flint clay, aloxite stone, aluminium vanadine, coal drystone, alundum etc.The shortcoming of this disclosed method is not remove the step of impurity, and the coagulation effect of coagulating agent is descended.
The object of the present invention is to provide a kind of is the magnesium ion containing flocculating agents for waste that raw material prepares with depleted bittern or bittern, and this coagulating agent is low price not only, and applied widely.
Another object of the present invention is to provide a kind of is raw material with depleted bittern or bittern, produces the method for magnesium ion containing flocculating agents for waste, and this method is very easy, can solve processing, the handling problems of bittern pollutent simultaneously again.
Above-mentioned purpose of the present invention and realize that the concrete practice of these purposes will become obvious by following description.
The selected raw material of the present invention is bittern or the bittern that is regarded as waste mostly, these raw materials are extensively to exist in some factory and occurring in nature, for instance, can in source, many places such as the flue dust settling tank at saltern, alkali factory, coal-fired thermal power station and salt lake or saline groundwater, select, in the process of selecting raw material sources, should note the content of its magnesium ion, be example with liquid, and the content that requires magnesium ion wherein is more than 5g/ rises.In Australia, the Mg content of many salt pans and alkali factory and underground natural salt water all is higher than this its this requirement, and some can reach wherein that the content of magnesium ion is the 100g/ liter.
Magnesium ion containing flocculating agents for waste of the present invention is that impurity is formed by magnesium salts, organic polymer coargulator, magnesium hydroxide and non-effective ingredient, by weight percentage, wherein magnesium salts accounts for 40-90%, and organic polymer coargulator accounts for 5-15%, magnesium hydroxide accounts for 0-30%, and impurity accounts for 5-15%.
Above-mentioned magnesium salts is MgCl
2, MgSO
4And MgCO
3Summation, the shared ratio of various magnesium salts is relevant by source, the place of production and the composition of raw material in the magnesium salts, become with the composition of raw material, but this does not influence the effect of coagulating agent of the present invention, so come the amount of various magnesium salts in the coagulating agent in the total amount of magnesium salts.
The preparation method of compound magnesium salts of the present invention comprises following step:
1, concentrates
Selected raw material is put into concentration basin concentrate, as mentioned above, the used raw material of the present invention can be depleted bittern or the bittern that various ways exists, and the magnesium ion concentration that makes feed liquid is in the scope that 15-100g/ rises.
2, remove salt impurity
Remove the impurity such as salt in the feed liquid, can adopt method of evaporation to remove salt impurity, also can adopt other method.
3, mix organic polymer coargulator
Ratio according to every liter of feed liquid 5-15mg is mixed organic polymer coargulator, as sodium acrylate or acrylamide and acrylic acid its polymers, stirs.
4, packing or dry packing
Get final product after above-mentioned feed liquid packing or drying comprised liquid state of the present invention or Powdered magnesium ion containing flocculating agents for waste.
The coagulating agent that makes in this way is exactly a magnesium ion containing flocculating agents for waste of the present invention, and it is by magnesium salts, and organic polymer coargulator and impurity are formed, and wherein magnesium salts is the summation of magnesium chloride, sal epsom and magnesiumcarbonate.
In order to make magnesium ion containing flocculating agents for waste of the present invention adapt to the demand that various wastewater is handled, also promptly before packing or the dry packing, add lime in above-mentioned steps 4 again, the add-on of lime is every liter of feed liquid 5-20g, makes lime and feed liquid reaction generation Mg (OH)
2, centrifugation is removed wherein moisture content and being partly dissolved property impurity, and then is carried out comprising or dry packing of step 4.
The coagulating agent that makes in this way is made up of magnesium salts, organic polymer coargulator, magnesium hydroxide and impurity, and wherein magnesium hydroxide accounts for the 0-30% of coagulating agent gross weight.
Embodiment one:
The bittern that uses the saltern is as raw material, the content of magnesium ion is the 21.5g/ liter in the feed liquid, it is condensed into magnesium ion concentration is the feed liquid that 85.6mg/ rises, and heating evaporation is separated out impurity such as NaCl, ratio according to every liter of feed liquid 10mg adds sodium acrylate then, stir, above-mentioned feed liquid is dry and package, record the sub-percentage composition of each component of this coagulating agent and be respectively magnesium salts 81.4%, organic polymer coargulator 9.1%, impurity are 10.5%.
Embodiment two:
The bittern that uses alkali factory is as raw material, the content of magnesium ion is the 10.3g/ liter in the feed liquid, with its concentration that is condensed into magnesium ion is the 49.8mg/ liter, remove impurity such as NaCl, the ratio according to every liter of feed liquid 15mg adds sodium acrylate then, stirs, adding 20g lime again reacts itself and feed liquid, the aqueous solution of separating is removed in centrifugation, dry back packing.The percentage composition that records each component in this coagulating agent is respectively: magnesium salts 54.2%, organic polymer coargulator 10.3%, Mg (OH)
225.9%, impurity is 9.6%.
Be to adopt magnesium ion containing flocculating agents for waste of the present invention to handle the embodiment of trade effluent and heavy rain ponding below.
Embodiment three:
Handle trade effluent with worker's magnesium ion containing flocculating agents for waste of the present invention, the add-on of coagulating agent is the 140mg/ liter, and the color of waste water is a Vandyke brown, and dense hydrogen sulfide odor is arranged, and the water quality situation before and after handling is as shown in the table:
Clearance (%) after the processing pre-treatment
Concentration 2,136 192.24 90.1
Suspended substance (mg/ liter) 64,600 6847.6 89.4
Grease (mg/ liter) 2,018 252.25 87.5
BOD (mg/ liter) 111 33.925 70.5
(mg/ rises 230 65.78 71.4 to CDD
Cadmium (Cd, micrograms per litre) 7 1.372 80.4
Plumbous (Pb, micrograms per litre) 70 13.33 80.9
Embodiment three shows that the application's magnesium ion containing flocculating agents for waste also has certain effect to removing heavy metal.
Embodiment four:
Adopt magnesium ion containing flocculating agents for waste of the present invention to handle heavy rain ponding, the add-on of coagulating agent is the 170mg/ liter, and the color of sewage is isabelline, and the water quality situation before and after handling is as shown in the table:
Clearance (%) after the processing pre-treatment
Concentration 1,205 127.73 89.4
Suspended substance (mg/ liter) 374 50.49 86.5
Grease (mg/ liter) 198 33.858 82.9
BOD (mg/ liter) 85 20.655 75.7
CDD (mg/ liter) 127 29.464 76.8
Cadmium (Cd, micrograms per litre) 5 1.48 70.3
Plumbous (Pb, micrograms per litre) 37 10.508 71.6
Therefore, the effect that the magnesium ion containing flocculating agents for waste that adopts method of the present invention to make is handled waste water is very superior, the novel part of this magnesium ion containing flocculating agents for waste is to handle various waste water under various alkaline conditions, can remove suspended substance, grease and BOD and COD, meanwhile can also remove the part heavy metal, and processing efficiency height, cost is low, and is easy to use, and the heavy poly-effect under alkaline condition can avoid the obnoxious flavour of hydrogen sulfide one class to overflow, all there is not injury for human and environment, can significantly reduce relief liquor PH and adjust, and it is tight to generate sludge, is easy to dehydration with sour consumption, can ordinary method make a dry coal blob of slag, storage convenient transportation safety.Thereby this commercially available other flocculation agent is compared and is had stronger competitive power.
Summing up characteristics of the present invention is:
1, coagulant of the present invention is because the employing discarded object is made raw material, so price just Suitable.
2, in the preparation coagulant, it is useless also can to process and dispose bittern or bittern Gurry.
3, the flock that generates closely is easy to dehydration.
4, part that can be removed organic matter and heavy metal when removing suspension.
5, method is simple, is easy to promote.
Claims (2)
1. the preparation method of a magnesium ion containing flocculating agents for waste, this method comprises mixes organic polymer coargulator, and packing or drying step, it is characterized in that before mixing organic polymer coargulator and packing or drying step further comprising the steps of:
(1) selected discarded bittern or raw brine are concentrated, the magnesium ion concentration that makes feed liquid is in the scope that 15-100g/ rises;
(2) adopt method of evaporation to remove salt impurity.
2. the method for claim 1, it is characterized in that after mixing organic polymer coargulator, add lime again, the add-on of lime is every liter of feed liquid 5-20g, make the reaction of lime and feed liquid produce magnesium hydroxide, remove wherein moisture and being partly dissolved property impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105943A CN1039002C (en) | 1995-06-09 | 1995-06-09 | Magnesium ion containing flocculating agents for waste water treatment and method for preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105943A CN1039002C (en) | 1995-06-09 | 1995-06-09 | Magnesium ion containing flocculating agents for waste water treatment and method for preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1112905A CN1112905A (en) | 1995-12-06 |
| CN1039002C true CN1039002C (en) | 1998-07-08 |
Family
ID=5075673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95105943A Expired - Fee Related CN1039002C (en) | 1995-06-09 | 1995-06-09 | Magnesium ion containing flocculating agents for waste water treatment and method for preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039002C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004041731A1 (en) | 2002-11-05 | 2004-05-21 | Geo-Processors Pty Limited | Process and apparatus for the treatment of saline water |
| CN100363079C (en) * | 2004-06-25 | 2008-01-23 | 中国海洋大学 | Flocculant for sewage treatment |
| CN1305776C (en) * | 2004-08-27 | 2007-03-21 | 南昌东方星河纳米科技有限公司 | Aeration activating water processing agent and its producing process |
| CN101274794B (en) * | 2008-04-24 | 2010-12-29 | 泉州师范学院 | Fast no-damage method for rehabilitating heavy metal-polluted water |
| CN103449634A (en) * | 2013-09-02 | 2013-12-18 | 苏州富奇诺水治理设备有限公司 | Method for treating paint wastewater |
| CN105906014A (en) * | 2016-06-20 | 2016-08-31 | 江门市江海区炜洁净水材料有限公司 | Production technology for polymeric aluminum magnesium water purifying agent and water purifying method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5658598A (en) * | 1979-10-17 | 1981-05-21 | Agency Of Ind Science & Technol | Treatment of muddy water |
| JPS5992099A (en) * | 1982-11-18 | 1984-05-28 | Kurita Water Ind Ltd | Dehydration of sludge |
| CN1051157A (en) * | 1989-10-21 | 1991-05-08 | 西安公路学院 | A kind of composite macromolecule coagulant and compound method |
| CN1089239A (en) * | 1992-12-31 | 1994-07-13 | 机械电子工业部机械第十设计研究院 | Efficient flocculating demulsifier and manufacture method thereof |
-
1995
- 1995-06-09 CN CN95105943A patent/CN1039002C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5658598A (en) * | 1979-10-17 | 1981-05-21 | Agency Of Ind Science & Technol | Treatment of muddy water |
| JPS5992099A (en) * | 1982-11-18 | 1984-05-28 | Kurita Water Ind Ltd | Dehydration of sludge |
| CN1051157A (en) * | 1989-10-21 | 1991-05-08 | 西安公路学院 | A kind of composite macromolecule coagulant and compound method |
| CN1089239A (en) * | 1992-12-31 | 1994-07-13 | 机械电子工业部机械第十设计研究院 | Efficient flocculating demulsifier and manufacture method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1112905A (en) | 1995-12-06 |
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