CN111732176A - Defluorination flocculant for filtering out fluorine ions in frosting waste liquid and use method thereof - Google Patents
Defluorination flocculant for filtering out fluorine ions in frosting waste liquid and use method thereof Download PDFInfo
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- CN111732176A CN111732176A CN202010804730.2A CN202010804730A CN111732176A CN 111732176 A CN111732176 A CN 111732176A CN 202010804730 A CN202010804730 A CN 202010804730A CN 111732176 A CN111732176 A CN 111732176A
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- Prior art keywords
- defluorination
- flocculant
- waste liquid
- frosting
- fluoride ions
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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
- C02F1/58—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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a defluorination flocculant for filtering fluoride ions in frosting waste liquid, which comprises the following raw materials in percentage by mass: 32 to 40 percent of sodium chloride, 20 to 30 percent of calcium chloride, 36.8 to 39.8 percent of alum and 0.2 percent of polyaluminium chloride. The invention also discloses a use method of the defluorination flocculant for filtering out fluoride ions in the frosting waste liquid, which comprises the following steps: (1) preparing sodium chloride, calcium chloride, alum and polyaluminium chloride in proportion, mixing and crushing to below 200 meshes to prepare the defluorination flocculant; (2) putting the defluorination flocculant in the step (1) into the frosting waste liquid; (3) after the frosted waste liquid is naturally flocculated and settled for 2-3h, the sludge is concentrated, and finally the residue is discharged through a filter press. The method has the advantages of simple method, small dosage, convenient treatment, high fluoride removal rate, small amount of waste residues, low cost and the like.
Description
Technical Field
The invention belongs to the technical field of frosting waste liquid treatment, and particularly relates to a defluorination flocculant for filtering out fluoride ions in frosting waste liquid and a use method thereof.
Background
Along with the continuous improvement of the environmental protection treatment strength, the emission concentration index of harmful fluoride ions in the glass industry frosting waste liquid attracts more and more attention and becomes an important assessment index for judging whether the emission of the waste liquid reaches the standard in the industrial frosting industry, at present, the treatment of the glass frosting waste liquid generally adopts a lime milk neutralization treatment process or an activated alumina ball adsorption treatment process and the like, but the lime milk neutralization treatment process uses a large amount of lime milk, so that a large amount of hazardous solid waste residues can be generated, and the great treatment cost is brought to the treatment of the hazardous solid waste residues in the later period; the adsorption treatment process of the activated alumina ball needs frequent regeneration, the adsorption capacity is low, and the cost is too high. Based on the above-mentioned various defects of the treatment method of glass frosting waste liquid, further improvement is needed in the prior art.
Disclosure of Invention
The invention aims to provide a defluorination flocculant which can efficiently filter out fluoride ions in frosting waste liquid and a simple and convenient use method thereof.
Based on the purpose, the invention adopts the following technical scheme:
a defluorination flocculant for filtering out fluoride ions in frosting waste liquid comprises the following raw materials in percentage by mass: 32 to 40 percent of sodium chloride, 20 to 30 percent of calcium chloride, 36.8 to 39.8 percent of alum and 0.2 percent of polyaluminium chloride.
Further, the defluorination flocculant for filtering out fluoride ions in the frosting waste liquid comprises the following raw materials in percentage by mass: 36% of sodium chloride, 25% of calcium chloride, 38.3% of alum and 0.2% of polyaluminium chloride.
Furthermore, the particle size of the defluorination flocculant for filtering out fluoride ions in the frosting waste liquid is below 200 meshes.
The use method of the defluorination flocculant for filtering the fluoride ions in the frosted waste liquid comprises the following steps:
(1) preparing sodium chloride, calcium chloride, alum and polyaluminium chloride in proportion, mixing and crushing to below 200 meshes to prepare the defluorination flocculant;
(2) putting the defluorination flocculant in the step (1) into the frosting waste liquid;
(3) after the frosted waste liquid is naturally flocculated and settled for 2-3h, the sludge is concentrated, and finally the residue is discharged through a filter press.
Further, the mass volume ratio of the defluorination flocculant to the frosting waste liquid in the step (2) is 1000L: 2.3 to 2.6 Kg.
The defluorination flocculant for filtering out the fluoride ions in the frosting waste liquid and the use method thereof provided by the invention have the following beneficial effects:
(1) the defluorination flocculant for filtering out fluoride ions in frosting waste liquid is prepared from sodium chloride, calcium chloride, alum and polyaluminium chloride, wherein the sodium chloride, the calcium chloride, the polyaluminium chloride and fluosilicic acid in the frosting waste liquid generate sodium fluosilicate, calcium fluosilicate and aluminum fluosilicate particles with very low solubility through chemical reaction, tiny particles of the fluosilicate compounds are adsorbed by flocculent aluminum hydroxide gel after the alum is hydrolyzed, and meanwhile, the fluoride ions in the frosting waste liquid are adsorbed on a high-valent chlorine high-valent aluminum ion complex in an aluminum hydroxide flocculent through hydrogen bond adsorption and electrostatic adsorption to generate an aluminum fluoride complex for flocculation and sedimentation, so that the aim of defluorination is fulfilled.
(2) The use method provided by the invention can realize defluorination treatment of the frosted waste liquid in the glass industry, realize standard discharge of waste water, reduce the generation quantity of dangerous solid waste slag and save the cost of environmental protection treatment of frosted production enterprises. The method has the advantages of simple method, small dosage, convenient treatment, high fluoride removal rate, small amount of waste residues, low cost and the like, and can reduce the fluorine-containing concentration of the industrial frosting waste liquid from about 1200mg/L to below 10mg/L, thereby completing the discharge after reaching the standard.
Detailed Description
Example 1:
a defluorination flocculant for filtering out fluoride ions in frosting waste liquid comprises the following raw materials in percentage by mass: 40% of sodium chloride, 20% of calcium chloride, 39.8% of alum and 0.2% of polyaluminium chloride. The particle size of the defluorination flocculant is below 200 meshes.
A use method of a defluorination flocculant for filtering out fluoride ions in frosted waste liquid comprises the following steps:
(1) preparing sodium chloride, calcium chloride, alum and polyaluminium chloride in proportion, mixing and crushing to below 200 meshes to prepare the defluorination flocculant;
(2) putting the defluorination flocculant in the step (1) into the frosted waste liquid, wherein the mass volume ratio of the defluorination flocculant to the frosted waste liquid is 1000L: 2.3 Kg.
(3) After the frosted waste liquid is naturally flocculated and settled for 2 hours, the sludge is concentrated, and finally the residue is discharged through a filter press.
Before the defluorination flocculant is put in, the fluorine-containing concentration of the frosted waste liquid is 1200mg/L, the fluorine-containing concentration of the supernatant after the flocculation and deslagging treatment is reduced to 8.8mg/L, and the deslagging amount is 3.1KG, so that the aims of standard discharge of the fluorine-containing waste liquid and reduction of the fluorine-containing waste residue amount are fulfilled.
Example 2:
a defluorination flocculant for filtering out fluoride ions in frosting waste liquid comprises the following raw materials in percentage by mass: 35% of sodium chloride, 28% of calcium chloride, 36.8% of alum and 0.2% of polyaluminium chloride. The particle size of the defluorination flocculant is below 200 meshes.
A use method of a defluorination flocculant for filtering out fluoride ions in frosted waste liquid comprises the following steps:
(1) preparing sodium chloride, calcium chloride, alum and polyaluminium chloride in proportion, mixing and crushing to below 200 meshes to prepare the defluorination flocculant;
(2) putting the defluorination flocculant in the step (1) into the frosted waste liquid, wherein the mass volume ratio of the defluorination flocculant to the frosted waste liquid is 1000L: 2.5 Kg.
(3) After the frosted waste liquid is naturally flocculated and settled for 2.5h, the sludge is concentrated, and finally the residue is discharged through a filter press.
Before the defluorination flocculant is put in, the fluorine-containing concentration of the frosted waste liquid is 1080mg/L, the fluorine-containing concentration of the supernatant after the flocculation and deslagging treatment is reduced to 9.6mg/L, the deslagging amount is 3.3KG, and the aims of standard discharge of the fluorine-containing waste liquid and reduction of the fluorine-containing waste residue amount are fulfilled.
Example 3:
a defluorination flocculant for filtering out fluoride ions in frosting waste liquid comprises the following raw materials in percentage by mass: 32% of sodium chloride, 30% of calcium chloride, 37.8% of alum and 0.2% of polyaluminium chloride. The particle size of the defluorination flocculant is below 200 meshes.
A use method of a defluorination flocculant for filtering out fluoride ions in frosted waste liquid comprises the following steps:
(1) preparing sodium chloride, calcium chloride, alum and polyaluminium chloride in proportion, mixing and crushing to below 200 meshes to prepare the defluorination flocculant;
(2) putting the defluorination flocculant in the step (1) into the frosted waste liquid, wherein the mass volume ratio of the defluorination flocculant to the frosted waste liquid is 1000L: 2.6 Kg.
(3) After the frosted waste liquid is naturally flocculated and settled for 3h, the sludge is concentrated, and finally the residue is discharged through a filter press.
Before the defluorination flocculant is put in, the fluorine-containing concentration of the frosted waste liquid is 1150mg/L, the fluorine-containing concentration of the supernatant after the flocculation and deslagging treatment is reduced to 9.0mg/L, the deslagging amount is 3.5KG, and the aims of standard discharge of the fluorine-containing waste liquid and reduction of the fluorine-containing waste residue amount are fulfilled.
Claims (5)
1. The defluorination flocculant for filtering out fluoride ions in frosting waste liquid is characterized by comprising the following raw materials in percentage by mass: 32 to 40 percent of sodium chloride, 20 to 30 percent of calcium chloride, 36.8 to 39.8 percent of alum and 0.2 percent of polyaluminium chloride.
2. The defluorination flocculant for filtering out the fluoride ions in the frosted waste liquid according to claim 1, which is characterized in that the defluorination flocculant for filtering out the fluoride ions in the frosted waste liquid comprises the following raw materials in percentage by mass: 36% of sodium chloride, 25% of calcium chloride, 38.3% of alum and 0.2% of polyaluminium chloride.
3. The defluorination flocculant for filtering fluoride ions in frosting waste liquid according to claim 1 or 2, wherein the particle size of the defluorination flocculant for filtering fluoride ions in frosting waste liquid is below 200 meshes.
4. The use method of the defluorination flocculant for filtering the fluoride ions in the frosted waste liquid according to the claim 1 or 2, characterized in that the use method of the defluorination flocculant for filtering the fluoride ions in the frosted waste liquid comprises the following steps:
(1) preparing sodium chloride, calcium chloride, alum and polyaluminium chloride in proportion, mixing and crushing to below 200 meshes to prepare the defluorination flocculant;
(2) putting the defluorination flocculant in the step (1) into the frosting waste liquid;
(3) after the frosted waste liquid is naturally flocculated and settled for 2-3h, the sludge is concentrated, and finally the residue is discharged through a filter press.
5. The use method of the defluorination flocculant for filtering out fluoride ions in frosting waste liquid according to claim 4, wherein the mass volume ratio of the defluorination flocculant to the frosting waste liquid in the step (2) is 1000L: 2.3 to 2.6 Kg.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010804730.2A CN111732176A (en) | 2020-08-12 | 2020-08-12 | Defluorination flocculant for filtering out fluorine ions in frosting waste liquid and use method thereof |
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| CN202010804730.2A CN111732176A (en) | 2020-08-12 | 2020-08-12 | Defluorination flocculant for filtering out fluorine ions in frosting waste liquid and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955837A (en) * | 2021-10-18 | 2022-01-21 | 神美科技有限公司 | Inorganic-organic composite polymer defluorination flocculant for water treatment and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020023882A1 (en) * | 2000-06-02 | 2002-02-28 | Jae-Choon So | Remover of fluoride ion and treatment method for wastewater containing fluoride ion using the same |
| US20060006115A1 (en) * | 2004-07-08 | 2006-01-12 | Chen-Hung Hsien | Method of fluoride-containing wastewater treatment |
| CN108217894A (en) * | 2017-12-13 | 2018-06-29 | 赛恩斯环保股份有限公司 | A kind of preparation method and application of efficient defluorinate ferro-aluminum complex reagent |
-
2020
- 2020-08-12 CN CN202010804730.2A patent/CN111732176A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020023882A1 (en) * | 2000-06-02 | 2002-02-28 | Jae-Choon So | Remover of fluoride ion and treatment method for wastewater containing fluoride ion using the same |
| US20060006115A1 (en) * | 2004-07-08 | 2006-01-12 | Chen-Hung Hsien | Method of fluoride-containing wastewater treatment |
| CN108217894A (en) * | 2017-12-13 | 2018-06-29 | 赛恩斯环保股份有限公司 | A kind of preparation method and application of efficient defluorinate ferro-aluminum complex reagent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955837A (en) * | 2021-10-18 | 2022-01-21 | 神美科技有限公司 | Inorganic-organic composite polymer defluorination flocculant for water treatment and preparation method thereof |
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Application publication date: 20201002 |