CN105410855A - Refining method of by-product industrial salt - Google Patents
Refining method of by-product industrial salt Download PDFInfo
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- CN105410855A CN105410855A CN201510837365.4A CN201510837365A CN105410855A CN 105410855 A CN105410855 A CN 105410855A CN 201510837365 A CN201510837365 A CN 201510837365A CN 105410855 A CN105410855 A CN 105410855A
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- industrial salt
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- product nacl
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a refining method of by-product industrial salt and belongs to the technical field of by-product industrial salt treatment. The refining method of by-product industrial salt comprises the following steps: (1) melting the by-product industrial salt in a mixing reactor, so that a saturated solution is obtained; (2) adding coagulating agent into the mixing reactor through the dosing nozzle of the mixing reactor, then raising the stirring rate to 210-350 round/minute to continuously react for 2-3 hours, wherein the addition amount of the coagulating agent is 2-5wt% that of the saturated solution obtained in step (1); (3) sending the mixture into an air-floatation machine to remove the suspended matters in the upper layer, so that a clear solution is obtained; (4) orderly filtrating the clear solution by a multi-media filter and an activated-carbon filter; and (5) evaporating the crystals and filtrating to obtain the purified table salt. The refining method of by-product industrial salt provided by the invention is rational in process route, simple to operate, relatively low in cost and capable of effectively refining the by-product industrial salt.
Description
Technical field
The present invention relates to by-product Nacl processing technology field, particularly a kind of process for purification of by-product Nacl.
Background technology
At present, by-product Nacl, because of containing a small amount of organic matter, is difficult to be effectively addressed and utilize, can not directly as the raw material of downstream product.Fixed-end forces center processing be stored up or be delivered in major part manufacturer can only.The disposal cost at current fixed-end forces center is up to 3000-4000 unit/t, and enterprise is difficult to bear, and main adopts processing mode landfill yard being taked to landfill again after anti-corrosion leak-proof process.This processing mode not only land occupation, also be the significant wastage to resource simultaneously, also there is potential risk environment being caused to grave danger, once anti-corrosion leak-proof layer leaks, soluble-salt and organic impurities will run off, salinization surrounding soil, harm is vegetation around, pollutes periphery water source, underground water and farmland simultaneously.
By-product Nacl is important Elementary Chemical Industry raw material, is also very valuable national strategy resource.Along with the high speed development of national economy, in Chemical Manufacture, various by-product Nacl amount is increasing, to environment structure grave danger.In recent years, people progressively improve resources conservation, eco-friendly understanding, and government there has also been remarkable reinforcement in environmental protection legislation and law enforcement dynamics, and in Chemical Manufacture, the process of by-product Nacl and recycling come into one's own day by day.
But, due in by-product Nacl containing more organic matter, be difficult to adopt traditional dissolving, filtration, evaporation, crystallization method clear up, therefore necessary design one more reasonably process for purification.
Summary of the invention
In order to make up the deficiency of organic matter inconvenience process in by-product Nacl, the invention provides a kind of process for purification of by-product Nacl, to solve the problem in above-mentioned background technology.
Technical scheme of the present invention is:
A process for purification for by-product Nacl, comprises the steps:
(1) by-product Nacl is dissolved in stirred tank, and with the speed Keep agitation 1-2h of 100-200 rev/min, obtains saturated solution;
(2) in described stirred tank, coagulant is added by the dosing mouth of pipe of described stirred tank, and stir speed (S.S.) is promoted to 210-350 rev/min, sustained response 2-3h, the addition of described coagulant is the 2-5wt% of the saturated solution that step (1) obtains;
(3) solution step (2) obtained sends into air floatation machine, is removed by upper strata suspended material, obtains clear liquid;
(4) clear liquid that step (3) obtains sequentially is filtered by more medium filter and active carbon filter;
(5) filtrate of step (4) is carried out evaporative crystallization, filter and obtain pure salt.
In the present invention, as the preferred technical scheme of one, described coagulant adopts clorox and aluminium polychloride.
In the present invention, as the preferred technical scheme of one, the weight ratio of clorox and aluminium polychloride is (1-3): 1.
In the present invention, as the preferred technical scheme of one, the weight ratio of clorox and aluminium polychloride is 2:1.
Owing to have employed technique scheme, the present invention has following beneficial effect:
First by-product Nacl is dissolved in stirred tank by the present invention, and with the speed Keep agitation 1-2h of 100-200 rev/min, obtains saturated solution; In described stirred tank, add coagulant by the dosing mouth of pipe of described stirred tank, and stir speed (S.S.) is promoted to 210-350 rev/min, sustained response 2-3h, the addition of described coagulant is the 2-5wt% of the saturated solution that step (1) obtains; Then solution is sent into air floatation machine, upper strata suspended material is removed, obtains clear liquid; Clear liquid is sequentially filtered by more medium filter and active carbon filter; Last filtrate carries out evaporative crystallization, filters and obtains pure salt.Based on above technique, the organic matter contained in by-product Nacl can effectively flocculate by the present invention, and carry out dissolved air flotation, again by more medium filter and the removing of the active carbon filter degree of depth, substantially increase organic removal efficiency, improve treatment effeciency and the quality of by-product Nacl, simultaneously, technological operation is simple, and cost is lower.
Inventor is through a large amount of test repeatedly, and described coagulant adopts clorox and aluminium polychloride, and the weight ratio of clorox and aluminium polychloride is (1-3): 1.Wherein, organic matter can fully destroy by clorox, and improve flocculating effect, organic matter then can effectively flocculate by aluminium polychloride.
In sum, present invention process route is reasonable, can by simple to operate, and cost is lower, by-product Nacl effectively can be refined.
Detailed description of the invention
Describe the present invention below in conjunction with specific embodiment.
Embodiment 1
A process for purification for by-product Nacl, comprises the steps:
(1) by-product Nacl is dissolved in stirred tank, and with the speed Keep agitation 1h of 100 revs/min, obtains saturated solution;
(2) in described stirred tank, coagulant is added by the dosing mouth of pipe of described stirred tank, described coagulant adopts clorox and aluminium polychloride, the weight ratio of clorox and aluminium polychloride is 1:1, and stir speed (S.S.) is promoted to 210 revs/min, sustained response 2h, the addition of described coagulant is the 2wt% of the saturated solution that step (1) obtains;
(3) solution step (2) obtained sends into air floatation machine, is removed by upper strata suspended material, obtains clear liquid;
(4) clear liquid that step (3) obtains sequentially is filtered by more medium filter and active carbon filter;
(5) filtrate of step (4) is carried out evaporative crystallization, filter and obtain pure salt.
The refining industrial salt index adopting the present embodiment to prepare is as follows:
| Project | Index |
| Sodium chloride (in NaCl) | 99.5 |
| Water-insoluble, % | 0.05 |
| Sulfate is (with SO 4 2-Meter) | 0.15 |
| Calcium ions and magnesium ions, % | 0.15 |
| Total organic carbon, mg/kg | 5.2 |
Embodiment 2
A process for purification for by-product Nacl, comprises the steps:
(1) by-product Nacl is dissolved in stirred tank, and with the speed Keep agitation 2h of 200 revs/min, obtains saturated solution;
(2) in described stirred tank, coagulant is added by the dosing mouth of pipe of described stirred tank, described coagulant adopts clorox and aluminium polychloride, the weight ratio of clorox and aluminium polychloride is 3:1, and stir speed (S.S.) is promoted to 350 revs/min, sustained response 3h, the addition of described coagulant is the 5wt% of the saturated solution that step (1) obtains;
(3) solution step (2) obtained sends into air floatation machine, is removed by upper strata suspended material, obtains clear liquid;
(4) clear liquid that step (3) obtains sequentially is filtered by more medium filter and active carbon filter;
(5) filtrate of step (4) is carried out evaporative crystallization, filter and obtain pure salt.
The refining industrial salt index adopting the present embodiment to prepare is as follows:
| Project | Index |
| Sodium chloride (in NaCl) | 99.5 |
| Water-insoluble, % | 0.05 |
| Sulfate is (with SO 4 2-Meter) | 0.17 |
| Calcium ions and magnesium ions, % | 0.13 |
| Total organic carbon, mg/kg | 5.1 |
Embodiment 3
A process for purification for by-product Nacl, comprises the steps:
(1) by-product Nacl is dissolved in stirred tank, and with the speed Keep agitation 1.5h of 150 revs/min, obtains saturated solution;
(2) in described stirred tank, coagulant is added by the dosing mouth of pipe of described stirred tank, described coagulant adopts clorox and aluminium polychloride, the weight ratio of clorox and aluminium polychloride is 2:1, and stir speed (S.S.) is promoted to 300 revs/min, sustained response 2.5h, the addition of described coagulant is the 4wt% of the saturated solution that step (1) obtains;
(3) solution step (2) obtained sends into air floatation machine, is removed by upper strata suspended material, obtains clear liquid;
(4) clear liquid that step (3) obtains sequentially is filtered by more medium filter and active carbon filter;
(5) filtrate of step (4) is carried out evaporative crystallization, filter and obtain pure salt.
The refining industrial salt index adopting the present embodiment to prepare is as follows:
| Project | Index |
| Sodium chloride (in NaCl) | 99.6 |
| Water-insoluble, % | 0.05 |
| Sulfate is (with SO 4 2-Meter) | 0.15 |
| Calcium ions and magnesium ions, % | 0.11 |
| Total organic carbon, mg/kg | 5.0 |
Embodiment 4
A process for purification for by-product Nacl, comprises the steps:
(1) by-product Nacl is dissolved in stirred tank, and with the speed Keep agitation 1h of 200 revs/min, obtains saturated solution;
(2) in described stirred tank, coagulant is added by the dosing mouth of pipe of described stirred tank, described coagulant adopts clorox and aluminium polychloride, the weight ratio of clorox and aluminium polychloride is 1:1, and stir speed (S.S.) is promoted to 350 revs/min, sustained response 2h, the addition of described coagulant is the 3wt% of the saturated solution that step (1) obtains;
(3) solution step (2) obtained sends into air floatation machine, is removed by upper strata suspended material, obtains clear liquid;
(4) clear liquid that step (3) obtains sequentially is filtered by more medium filter and active carbon filter;
(5) filtrate of step (4) is carried out evaporative crystallization, filter and obtain pure salt.
The refining industrial salt index adopting the present embodiment to prepare is as follows:
| Project | Index |
| Sodium chloride (in NaCl) | 99.5 |
| Water-insoluble, % | 0.06 |
| Sulfate is (with SO 4 2-Meter) | 0.17 |
| Calcium ions and magnesium ions, % | 0.11 |
| Total organic carbon, mg/kg | 5.3 |
Embodiment 5
A process for purification for by-product Nacl, comprises the steps:
(1) by-product Nacl is dissolved in stirred tank, and with the speed Keep agitation 2h of 150 revs/min, obtains saturated solution;
(2) in described stirred tank, coagulant is added by the dosing mouth of pipe of described stirred tank, described coagulant adopts clorox and aluminium polychloride, the weight ratio of clorox and aluminium polychloride is 3:1, and stir speed (S.S.) is promoted to 290 revs/min, sustained response 3h, the addition of described coagulant is the 4wt% of the saturated solution that step (1) obtains;
(3) solution step (2) obtained sends into air floatation machine, is removed by upper strata suspended material, obtains clear liquid;
(4) clear liquid that step (3) obtains sequentially is filtered by more medium filter and active carbon filter;
(5) filtrate of step (4) is carried out evaporative crystallization, filter and obtain pure salt.
The refining industrial salt index adopting the present embodiment to prepare is as follows:
| Project | Index |
| Sodium chloride (in NaCl) | 99.5 |
| Water-insoluble, % | 0.05 |
| Sulfate is (with SO 4 2-Meter) | 0.15 |
| Calcium ions and magnesium ions, % | 0.15 |
| Total organic carbon, mg/kg | 5.4 |
The above is only better embodiment of the present invention, therefore all equivalences done according to structure, feature and the principle described in patent claim of the present invention change or modify, and are included in patent claim of the present invention.
Claims (4)
1. a process for purification for by-product Nacl, is characterized in that: comprise the steps:
(1) by-product Nacl is dissolved in stirred tank, and with the speed Keep agitation 1-2h of 100-200 rev/min, obtains saturated solution;
(2) in described stirred tank, coagulant is added by the dosing mouth of pipe of described stirred tank, and stir speed (S.S.) is promoted to 210-350 rev/min, sustained response 2-3h, the addition of described coagulant is the 2-5wt% of the saturated solution that step (1) obtains;
(3) solution step (2) obtained sends into air floatation machine, is removed by upper strata suspended material, obtains clear liquid;
(4) clear liquid that step (3) obtains sequentially is filtered by more medium filter and active carbon filter;
(5) filtrate of step (4) is carried out evaporative crystallization, filter and obtain pure salt.
2. the process for purification of a kind of by-product Nacl as claimed in claim 1, is characterized in that: described coagulant adopts clorox and aluminium polychloride.
3. the process for purification of a kind of by-product Nacl as claimed in claim 2, is characterized in that: the weight ratio of clorox and aluminium polychloride is (1-3): 1.
4. the process for purification of a kind of by-product Nacl as claimed in claim 3, is characterized in that: the weight ratio of clorox and aluminium polychloride is 2:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510837365.4A CN105410855B (en) | 2015-11-26 | 2015-11-26 | A kind of process for purification of by-product Nacl |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510837365.4A CN105410855B (en) | 2015-11-26 | 2015-11-26 | A kind of process for purification of by-product Nacl |
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| CN105410855A true CN105410855A (en) | 2016-03-23 |
| CN105410855B CN105410855B (en) | 2018-09-04 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182084A (en) * | 2007-11-15 | 2008-05-21 | 天津市市政工程设计研究院 | Combined treating method for reclaimed water reuse |
| JP2008174393A (en) * | 2007-01-16 | 2008-07-31 | Jfe Engineering Kk | Method for producing salt |
| CN103342432A (en) * | 2013-07-23 | 2013-10-09 | 南京工业大学 | Near zero emission process of salt-containing waste water |
| CN104071808A (en) * | 2014-07-24 | 2014-10-01 | 哈尔滨工业大学 | Method for preparing industrial salt through separation, evaporation and crystallization of coal chemical strong brine |
-
2015
- 2015-11-26 CN CN201510837365.4A patent/CN105410855B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008174393A (en) * | 2007-01-16 | 2008-07-31 | Jfe Engineering Kk | Method for producing salt |
| CN101182084A (en) * | 2007-11-15 | 2008-05-21 | 天津市市政工程设计研究院 | Combined treating method for reclaimed water reuse |
| CN103342432A (en) * | 2013-07-23 | 2013-10-09 | 南京工业大学 | Near zero emission process of salt-containing waste water |
| CN104071808A (en) * | 2014-07-24 | 2014-10-01 | 哈尔滨工业大学 | Method for preparing industrial salt through separation, evaporation and crystallization of coal chemical strong brine |
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| CN105410855B (en) | 2018-09-04 |
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Address after: No. 03001, chlor alkali Road, Weifang Coastal Economic Development Zone, Shandong, Shandong Patentee after: Shandong Weifang Rainbow Chemical Co.,Ltd. Address before: 262737 Shandong Province, Weifang City Haiyuan Hanting Binhai Economic and Technological Development Zone Street No. 600 Patentee before: Shandong Weifang Rainbow Chemical Co.,Ltd. |