CN102689961A - Desilication flocculant used in silica gel wastewater treatment - Google Patents
Desilication flocculant used in silica gel wastewater treatment Download PDFInfo
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- CN102689961A CN102689961A CN2012101228158A CN201210122815A CN102689961A CN 102689961 A CN102689961 A CN 102689961A CN 2012101228158 A CN2012101228158 A CN 2012101228158A CN 201210122815 A CN201210122815 A CN 201210122815A CN 102689961 A CN102689961 A CN 102689961A
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Abstract
The invention relates to a treating agent used in wastewater purification, specifically relates to a desilication flocculant used in silica gel wastewater treatment, and pertains to the technical field of wastewater treatment. The desilication flocculant comprises the following components by weight: A, 200-400 parts of magnesium chloride and 50-100 parts of calcium chloride; B, 100-200 parts of ferric chloride; C, 1-5 parts of polyacrylamide. The components (i. e. the calcium chloride, the magnesium chloride, the ferric chloride and the polyacrylamide) of the desilication flocculant are added into waste water separately in the form of aqueous solution, and the dosages of the components are based on one liter of the waste water. The raw materials of the desilication flocculant are easy to get, the dosages of the raw materials are small. The desilication flocculant has low cost and a rapid flocculation settlement speed, can effectively remove colloidal silica and dissolved silica form waste water, and has good application prospects.
Description
Technical field
The present invention relates to a kind of treatment agent of purifying liquid waste, relate to a kind of desiliconization flocculation agent that is used for the silica gel wastewater treatment specifically, belong to technical field of waste water processing.
Technical background
Silica gel waste water has the acidity height, and saltiness is high, siliceous height, unmanageable characteristics.Silica gel waste water is mainly derived from silica gel washing link, contains a large amount of sodium sulfate and silicate in the waste water, and wherein sodium sulfate concentration can reach about 4%, and silicate (in SiO2) content is more than 300mg/L, and wherein the dissolved silicon hydrochlorate is greater than 80%.The vitriol of high density has harm to environment; Can cause water acidification and soil compaction; Sodium sulfate can reclaim the production Sodium sulfate anhydrous.min(99), is used for glass, enamel, paper pulp, refrigeration mixture, washing composition, siccative, dye-dilution agent, analytical chemistry reagent, pharmaceuticals etc.But because the existence of silicate, sodium sulfate can not obtain efficient recovery, and waste water also can not get thorough processing.So, handle silica gel waste water and at first will remove the silicon in the waste water.
The coagulation desiliconization is a kind of physico-chemical process that utilizes the oxide compound of some metal or oxyhydroxide that the absorption or the cohesion of silicon reached the desiliconization purpose.Like publication number is that the Chinese invention patent of CN101746907A provides a kind of silicon-containing wastewater treatment method; This method is in silicon-containing wastewater, to add the nucleation coagulant aids; And silicon-containing wastewater and nucleation coagulant aids are mixed, said nucleation coagulant aids is meant as the growth core minitype particle material aggregation of the difficult cohesion that suspends in the water is grown up and settled insoluble solid; With the pH regulator of silicon-containing wastewater to 3.5-9.The treatment process that this invention provides is applicable to the silicate waste water that various technological process is discharged.And this method is when being used for the processing of silica gel waste water, and desiliconization effect is relatively poor.Coagulating agent commonly used in the industry has magnesia mixture desiliconization, the desiliconization of aluminium salt, molysite desiliconization, lime desiliconization etc.; But these several kinds of desiliconization agents all have shortcoming separately: the best pH value of magnesia mixture desiliconization is 10.1～10.3, and need and lime use together and could guarantee desiliconization effect; Best pH scope and optimal temperature that aluminium salt removes colloid silicon all have higher requirements; Molysite desiliconization added amount of chemical is bigger, and simple lime desiliconization clearance is lower.At present, also there is not special-purpose flocculation agent for the silica gel wastewater treatment.
Summary of the invention
The object of the present invention is to provide a kind of being specifically designed to that silica gel waste water is carried out the desiliconization flocculation agent that desiliconization is handled.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of desiliconization flocculation agent that is used for the silica gel wastewater treatment, this desiliconization flocculation agent comprises following component by weight:
A, 200～400 parts in magnesium chloride, 50～100 parts in calcium chloride;
100～200 parts in B, iron(ic)chloride;
1～5 part of C, SEPIGEL 305.Each component of desiliconization flocculation agent: calcium chloride, magnesium chloride, iron(ic)chloride, SEPIGEL 305 all add respectively with aqueous solution form, and dosage is in every liter of waste water.
As preferably, the weight ratio of described calcium chloride, magnesium chloride, iron(ic)chloride and SEPIGEL 305 is 300:100:150:2.
As preferably, this desiliconization flocculation agent also comprises 50～100 parts of D, glass beads by weight.Glass bead is a kind of acid vitreous lava mineral substance (pitchstone ore in sand form), is processed to form the vitreous sealing of the Duo Kong ﹑ of Nei portion surface through special technology processing and production technique, is the thin footpath particle of spherule.In the present invention, glass bead directly drops in the waste water as the nucleation coagulant aids, can improve the total silicon clearance greatly.During use, glass bead adds in the waste water with the A component.
The present invention is composite through flocculation agent, ratio optimization, obtain a kind of applied widely, to the novel desiliconization flocculation agent that dissolves silicon and colloid silicon decreasing ratio are high, dosage is little, cost is low, for the silica gel utilization of wastewater resource is laid a good foundation.
The invention has the beneficial effects as follows: raw material sources of the present invention are convenient, and dosage is little, and cost is low, and settling of floccus is fast, can effectively remove colloid silicon and dissolves silicon in the waste water, has a good application prospect.
Embodiment
Through specific embodiment, technical scheme of the present invention is further specified below.
In the present invention, if not refer in particular to, all part, per-cents are weight unit, and all equipment and raw material etc. all can be buied from market or the industry is commonly used.
Embodiment 1-10:
Present embodiment describes the inventive method with certain silica gel factory waste water, and this waste water quality index is as shown in table 1.
The main water-quality guideline of certain silica gel factory waste water of table 1
| Project | Index/content | Project | Index/content |
| pH | 2.03 | Calcium ion (Ca 2+）/mg/L | 56.3 |
| Specific conductivity/μ s/cm | 17530 | Mg ion (Mg 2+)/mg/L | 50.2 |
| Cl ions (Cl -）/mg/L | 103.5 | Potassium ion (K +）/mg/L | 163.4 |
| Sulfate radical (SO 4 2-）/mg/L | 20282.3 | Total silicon (SiO 2）/mg/L | 306.2 |
| Sodium ion (Na +）/mg/L | 8481.7 | ? | ? |
1. water quality regulation
In the water quality regulation pond, in silica gel waste water, add lime, pH is transferred in the 7-8 scope.
2. coagulation silica removal
Each component of desiliconization flocculation agent: calcium chloride, magnesium chloride, iron(ic)chloride, SEPIGEL 305 all add with aqueous solution form, and dosage is in every liter of waste water.In advance calcium chloride, magnesium chloride, iron(ic)chloride, SEPIGEL 305 are configured to solution according to the amount shown in the table 2.
Waste water through regulating the pH value flows into coagulative precipitation tank, in waste water, adds calcium chloride and magnesium chloride, and adds glass bead, mixing according to the amount of table 2; Purpose is to remove dissolves silicon in the waste water, behind the sufficient reacting, in waste water, adds ferric chloride Solution(38 again; Thorough mixing adds SEPIGEL 305 at last to form alumen ustum, and alumen ustum is increased; Quicken sedimentation, the hydraulic retention of waste water in coagulative precipitation tank obtained limpider supernatant through the pulp water separation about 45 minutes.In the entire treatment, waste water adopts hydrofluoric acid to transform the spectrophotometric analysis all-silicon content through mix, flocculation, precipitation process, and the result sees table 2.
Desiliconization flocculation agent provided by the invention is higher to the total silicon clearance in the silica gel waste water, water reuse in can realizing through follow-up processing.The adding of glass bead can effectively improve the removing of silicon, and improves treatment effect and effluent quality.
Above-described embodiment is a kind of preferable scheme of the present invention, is not that the present invention is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Claims (3)
1. desiliconization flocculation agent that is used for the silica gel wastewater treatment is characterized in that this desiliconization flocculation agent comprises following component by weight:
A, 200～400 parts in magnesium chloride, 50～100 parts in calcium chloride;
100～200 parts in B, iron(ic)chloride;
1～5 part of C, SEPIGEL 305.
2. desiliconization flocculation agent according to claim 1 is characterized in that: the weight ratio of described calcium chloride, magnesium chloride, iron(ic)chloride and SEPIGEL 305 is 300:100:150:2.
3. desiliconization flocculation agent according to claim 1 is characterized in that: this desiliconization flocculation agent also comprises 50～100 parts of D, glass beads by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201210122815 CN102689961B (en) | 2012-04-25 | 2012-04-25 | Desilication flocculant used in silica gel wastewater treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210122815 CN102689961B (en) | 2012-04-25 | 2012-04-25 | Desilication flocculant used in silica gel wastewater treatment |
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| CN102689961A true CN102689961A (en) | 2012-09-26 |
| CN102689961B CN102689961B (en) | 2013-09-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003438A (en) * | 2013-02-26 | 2014-08-27 | 中国科学院过程工程研究所 | Method for desiliconization of zirconium oxychloride acidolysis solution |
| CN107021554A (en) * | 2017-06-12 | 2017-08-08 | 河海大学 | Drinking water special efficient removes the compounding coagulation agent and its application method and purposes of silicon |
| CN110040828A (en) * | 2019-04-24 | 2019-07-23 | 福建佰利源科技有限公司 | A kind of integrated conduct method of discarded glue |
| CN113912127A (en) * | 2021-11-26 | 2022-01-11 | 中伟新材料股份有限公司 | Method for removing silicon from manganese sulfate solution |
| CN114133011A (en) * | 2021-10-28 | 2022-03-04 | 南京展能特化学品有限公司 | Multifunctional efficient silicon removing agent and preparation method thereof |
| CN115594272A (en) * | 2022-11-09 | 2023-01-13 | 德蓝(海南)未来之水有限公司（Cn） | Efficient silicon removal agent for coal chemical wastewater, preparation and use method thereof |
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| JPS5676293A (en) * | 1979-11-28 | 1981-06-23 | Norihiko Base | Application of high polymer flocculant |
| CN101327976A (en) * | 2008-07-15 | 2008-12-24 | 南通立源水处理技术有限公司 | Efficient water treatment flocculant |
| CN101746907A (en) * | 2008-12-01 | 2010-06-23 | 中国石油化工股份有限公司 | Silicon-containing wastewater treatment method |
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2012
- 2012-04-25 CN CN 201210122815 patent/CN102689961B/en not_active Expired - Fee Related
Patent Citations (3)
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| JPS5676293A (en) * | 1979-11-28 | 1981-06-23 | Norihiko Base | Application of high polymer flocculant |
| CN101327976A (en) * | 2008-07-15 | 2008-12-24 | 南通立源水处理技术有限公司 | Efficient water treatment flocculant |
| CN101746907A (en) * | 2008-12-01 | 2010-06-23 | 中国石油化工股份有限公司 | Silicon-containing wastewater treatment method |
Non-Patent Citations (1)
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| 裘湛等: "稠油废水回用热采锅炉除硅试验研究", 《环境工程》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003438A (en) * | 2013-02-26 | 2014-08-27 | 中国科学院过程工程研究所 | Method for desiliconization of zirconium oxychloride acidolysis solution |
| CN104003438B (en) * | 2013-02-26 | 2016-04-06 | 中国科学院过程工程研究所 | The method of a kind of zirconium oxychloride acid hydrolysis solution desiliconization |
| CN107021554A (en) * | 2017-06-12 | 2017-08-08 | 河海大学 | Drinking water special efficient removes the compounding coagulation agent and its application method and purposes of silicon |
| CN110040828A (en) * | 2019-04-24 | 2019-07-23 | 福建佰利源科技有限公司 | A kind of integrated conduct method of discarded glue |
| CN114133011A (en) * | 2021-10-28 | 2022-03-04 | 南京展能特化学品有限公司 | Multifunctional efficient silicon removing agent and preparation method thereof |
| CN113912127A (en) * | 2021-11-26 | 2022-01-11 | 中伟新材料股份有限公司 | Method for removing silicon from manganese sulfate solution |
| CN113912127B (en) * | 2021-11-26 | 2023-09-08 | 中伟新材料股份有限公司 | Method for removing silicon from manganese sulfate solution |
| CN115594272A (en) * | 2022-11-09 | 2023-01-13 | 德蓝(海南)未来之水有限公司（Cn） | Efficient silicon removal agent for coal chemical wastewater, preparation and use method thereof |
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| CN102689961B (en) | 2013-09-25 |
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