CN104528908A - Method for removing fluorine in acidic wastewater by using lime serving as byproduct - Google Patents
Method for removing fluorine in acidic wastewater by using lime serving as byproduct Download PDFInfo
- Publication number
- CN104528908A CN104528908A CN201410759594.4A CN201410759594A CN104528908A CN 104528908 A CN104528908 A CN 104528908A CN 201410759594 A CN201410759594 A CN 201410759594A CN 104528908 A CN104528908 A CN 104528908A
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- CN
- China
- Prior art keywords
- lime
- waste water
- reaction
- fluorine
- acidic wastewater
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
Abstract
The invention discloses a method for removing fluorine in acidic wastewater by using lime serving as a byproduct. The method comprises the following concrete steps of adding lime serving as a byproduct generated in the process of preparing ammonium sulfate by using phosphogypsum into fluorine-containing acidic wastewater, wherein the ratio of raw materials is controlled, the ratio of the addition amount of the lime to the mass of the acidic wastewater is 3.0-4.0%, the reaction temperature is 40-50 DEG C, the reaction time is 2-3 hours, the reaction pH value control range is 2.0-3.0, and the requirement for fluorine removal of the acidic wastewater can be met after the reaction is ended. The method has the beneficial effects that lab test production and acidic wastewater analysis are carried out to prove that the phosphorus content is 1.42%, the fluorine content is 0.0102%, the ratio of phosphorus to fluorine is larger than 100, and the requirement for serving as raw water for subsequently producing feed-grade calcium hydrophosphate can be completely met.
Description
Technical field
The present invention relates to the technology in phosphorous chemical industry production, a kind of novel method of acid waste water defluorinate.Be specifically related to the method utilizing the lime of phosphogypsum sulphur ammonium by-product for acid waste water defluorinate.
Background technology
At present, phosphorous chemical industry enterprise is faced with severe environmental protection pressure, in Large-scale Phosphorus Chemical Manufacture enterprise, there is a large amount of phosphogypsums and acid waste water that is phosphorous, fluorine needs process.Along with improving constantly of fully utilizing phosphogypsum, phosphogypsum produces sulphur ammonium technology also in continuous maturation.The lime that in the process of phosphogypsum sulphur ammonium, some qualities of meeting by-product are relatively low, in order to avoid forming secondary pollution, it is very important for therefore how making good use of the development of these lime to phosphogypsum ammonium sulfate device.
For the acidic fluoride-containing waste water that present phosphorous chemical industry enterprise produces, the lime mainly adding high-quality in acid waste water simply processes, water after process discharges after reaching industrial discharge standard, for limiting the lime adopting high-quality, not only increase production cost, and cause the waste of resource.
Therefore, in actual production, fully can realize the recycling of waste resource, strengthen the construction of recycling economy, reduce the first order issue that environmental protection pressure Deng Doushi phosphorous chemical industry enterprise needs to solve.
Summary of the invention
Main purpose of the present invention is that the by-product lime being devoted to phosphogypsum sulphur ammonium utilizes, and reaches the requirement of acid waste water defluorinate, makes acid waste water and these original waste resources of by-product lime can meet the requirement of raw materials for production, can recycle in subsequent production process.
A kind of method utilizing by-product lime to remove fluorine in acid waste water of the present invention, realize by following technical measures, concrete steps are: add in acidic fluoride-containing waste water by the by-product lime of phosphogypsum sulphur ammonium, wherein control, material rate, the mass ratio of lime adding amount and acid waste water is: 3.0% ~ 4.0%, temperature of reaction is: 40 DEG C ~ 50 DEG C, reaction times is: 2h ~ 3h, and pH value in reaction span of control is: 2.0 ~ 3.0, can be reached the requirement of acid waste water defluorinate by reaction;
In method, the main component of acidic fluoride-containing waste water is, Oil repellent is 0.92%, and sulfate radical is 0.42%, and phosphorus is 1.7%, and containing some other micro-metals;
In the by-product lime of phosphogypsum sulphur ammonium, calcium oxide content 45% ~ 60%, and contains a small amount of calcium sulfate, calcium carbonate and trace metal oxide compound.
Beneficial effect of the present invention, is produced by lab scale, is getting in filtrate analysis, phosphorus content is 1.42%, Oil repellent is 0.0102%, and phosphorus fluorine ratio is greater than 100, and filtrate (being equivalent to the acid waste water after processing) can meet the requirement that subsequent production calcium hydrophosphate fodder does starting material with water use completely.
Embodiment
Further illustrate the present invention below by way of specific embodiment, but be not used for limiting the scope of the invention.
embodiment 1
Take acid waste water 1000g, the by-product lime 30g of phosphogypsum sulphur ammonium, added by lime in acid waste water, controlling temperature of reaction is 40 DEG C, and the reaction times is 2h, pH value in reaction span of control is: 2.0 ~ 3.0, after having reacted, sedimentation 15 minutes, then suction filtration, get filtrate analysis (being equivalent to the acid waste water after processing), phosphorus content is 1.42%.Oil repellent is 0.0102%, and phosphorus fluorine ratio is greater than 100, can meet the requirement of subsequent production calcium hydrophosphate fodder.
embodiment 2
Take acid waste water 1000g, the by-product lime 35g of phosphogypsum sulphur ammonium, added by lime in acid waste water, controlling temperature of reaction is 45 DEG C, and the reaction times is 2h, pH value in reaction span of control is: 2.0 ~ 3.0, after having reacted, sedimentation 15 minutes, then suction filtration, get filtrate (being equivalent to the acid waste water after processing) to analyze, phosphorus content is 1.40%.Oil repellent is 0.0100%, and phosphorus fluorine ratio is greater than 100, can meet the requirement that subsequent production calcium hydrophosphate fodder starting material with water uses.
Embodiment 3
Take acid waste water 1000g, the by-product lime 40g of phosphogypsum sulphur ammonium, adds lime in acid waste water, and controlling temperature of reaction is 50 DEG C, and the reaction times is 2h, and pH value in reaction span of control is: 2.0 ~ 3.0
,after having reacted, sedimentation 15 minutes, then suction filtration, get filtrate (being equivalent to the acid waste water after processing) and analyze, phosphorus content is 1.40%.Oil repellent is 0.0100%, and phosphorus fluorine ratio is greater than 100, can meet the requirement that subsequent production calcium hydrophosphate fodder starting material with water uses.
Claims (1)
1. the method utilizing by-product lime to remove fluorine in acid waste water, it is characterized in that realizing by following technical measures, concrete steps are: add in acidic fluoride-containing waste water by the by-product lime of phosphogypsum sulphur ammonium, wherein control, material rate, the mass ratio of lime adding amount and acid waste water is: 3.0% ~ 4.0%, temperature of reaction is: 40 DEG C ~ 50 DEG C, reaction times is: 2h ~ 3h, and pH value in reaction span of control is: 2.0 ~ 3.0, can be reached the requirement of acid waste water defluorinate by reaction;
In method, the main component of acidic fluoride-containing waste water is, Oil repellent is 0.92%, and sulfate radical is 0.42%, and phosphorus is 1.7%, and containing some other micro-metals;
In the by-product lime of phosphogypsum sulphur ammonium, calcium oxide content 45% ~ 60%, and contains a small amount of calcium sulfate, calcium carbonate and trace metal oxide compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759594.4A CN104528908A (en) | 2014-12-12 | 2014-12-12 | Method for removing fluorine in acidic wastewater by using lime serving as byproduct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759594.4A CN104528908A (en) | 2014-12-12 | 2014-12-12 | Method for removing fluorine in acidic wastewater by using lime serving as byproduct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104528908A true CN104528908A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410759594.4A Pending CN104528908A (en) | 2014-12-12 | 2014-12-12 | Method for removing fluorine in acidic wastewater by using lime serving as byproduct |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106167272A (en) * | 2016-02-23 | 2016-11-30 | 瓮福（集团）有限责任公司 | Utilize the method that Phosphate Fertilizer Industry waste water produces feed grade calcium carbonate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218354A (en) * | 2005-02-08 | 2006-08-24 | Kurita Water Ind Ltd | Method for treating fluorine-containing waste water |
| CN102070267A (en) * | 2010-11-30 | 2011-05-25 | 湖北大峪口化工有限责任公司 | Method for treating high-concentration acidic wastewater containing phosphorus and fluorine |
| CN102491555A (en) * | 2011-12-01 | 2012-06-13 | 核工业北京化工冶金研究院 | Method for removing fluorine in acid uranium process wastewater |
| CN103613181A (en) * | 2013-11-29 | 2014-03-05 | 瓮福（集团）有限责任公司 | Method for treating phosphogypsum slag dump pool water by using low-grade lime |
-
2014
- 2014-12-12 CN CN201410759594.4A patent/CN104528908A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218354A (en) * | 2005-02-08 | 2006-08-24 | Kurita Water Ind Ltd | Method for treating fluorine-containing waste water |
| CN102070267A (en) * | 2010-11-30 | 2011-05-25 | 湖北大峪口化工有限责任公司 | Method for treating high-concentration acidic wastewater containing phosphorus and fluorine |
| CN102491555A (en) * | 2011-12-01 | 2012-06-13 | 核工业北京化工冶金研究院 | Method for removing fluorine in acid uranium process wastewater |
| CN103613181A (en) * | 2013-11-29 | 2014-03-05 | 瓮福（集团）有限责任公司 | Method for treating phosphogypsum slag dump pool water by using low-grade lime |
Non-Patent Citations (1)
| Title |
|---|
| 蔡新华: "《农业生态环境工程技术标准规范与现行政策法规实用手册：及典型案例分析 第3卷》", 31 March 2003, 中科多媒体电子出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106167272A (en) * | 2016-02-23 | 2016-11-30 | 瓮福（集团）有限责任公司 | Utilize the method that Phosphate Fertilizer Industry waste water produces feed grade calcium carbonate |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150422 |