CN103011204A - Continuous brine purification and production technique based on lime-mirabilite-flue gas method - Google Patents
Continuous brine purification and production technique based on lime-mirabilite-flue gas method Download PDFInfo
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- CN103011204A CN103011204A CN2012105812567A CN201210581256A CN103011204A CN 103011204 A CN103011204 A CN 103011204A CN 2012105812567 A CN2012105812567 A CN 2012105812567A CN 201210581256 A CN201210581256 A CN 201210581256A CN 103011204 A CN103011204 A CN 103011204A
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Abstract
The invention discloses a continuous brine purification and production technique based on a lime-mirabilite-flue gas method, which comprises the following continuously performed steps: 1) pulping lime, introducing lime supernatant into a causticizing reaction tank, and simultaneously introducing brine and a mirabilite solution to remove Ca<2+> and Mg<2+> in the brine, thus obtaining finished reaction pulp; 2) precipitating the finished reaction pulp, and obtaining supernatant after primary precipitation; 3) performing carbonization reaction on the supernatant after primary precipitation and purified flue gas, further removing Ca<2+>, obtaining finished carbonization reaction pulp, and ensuring that the pH value of the finished carbonization reaction pulp is 7-9 by controlling the introducing amount of the flue gas; and 4) precipitating the finished carbonization reaction pulp, and obtaining supernatant after secondary precipitation, namely purified brine. According to the invention, the technological level of brine purification and production can be improved, the energy consumption can be reduced, and the equipment utilization rate can be improved, thereby achieving the purpose of lowering the brine purification and production cost.
Description
Technical field
The present invention relates to a kind of bittern purifying production technique, particularly the continuous bittern purifying production technique of a kind of lime-saltcake-flue gas method.
Background technology
Present bittern purifying technique is step production technique, there is no the production technique of the bittern purifying that carries out continuously truly.The problem that existing production technique exists is: technique is discontinuous, and energy consumption is high; Because intermittent reaction, the surge tank number of employing is many, has increased the energy consumption of producing.
Summary of the invention
The present invention provides a kind of lime-saltcake-flue gas method continuous bittern purifying production technique for solving the technical problem that exists in the known technology, this technique can improve the state of the art that bittern purifying is produced, reduce energy consumption, improve plant factor, and then reach the purpose that reduces the bittern purifying production cost.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the continuous bittern purifying production technique of a kind of lime-saltcake-flue gas method comprises the following steps of carrying out continuously:
One) lime making beating passes into the causticizing reaction tank with excessive 2% the lime supernatant liquid of being not more than, and simultaneously, passes into bittern and excessive 2% the saltcake solution that is not more than, to remove the Ca in the bittern
2+And Mg
2+In causticizing reaction, stir; After fully reacting, obtain reaction and finish slurries;
Two) reaction is finished slurries and carried out sedimentation, obtain supernatant liquid after the sedimentation;
Three) make after the sedimentation supernatant liquid and purify rear pass gas and carry out carburizing reagent, again remove Ca
2+, to obtain carburizing reagent and finish slurries, the intake by control stack gas makes carburizing reagent finish the PH=7 of slurries～9;
Four) carburizing reagent is finished slurries and carried out sedimentation, obtain supernatant liquid behind the secondary settlement, be the bittern of purification.
Described step 2) and step 4) all in the mud subsider, carry out.
Described step 1) concentration of lime supernatant liquid is 1～3g/l in.
Described step 3) CO in the stack gas
2Concentration be 8%-18%.
Advantage and positively effect that the present invention has are:
1) at first adopts continuous bittern purifying production technique, reduced the equipment that uses, reduced production cost.
2) adopt continuous lime-stack gas to carry out bittern purifying, take full advantage of cheap lime and the CO in the stack gas
2, to reach the purpose of deliming, magnesium, this not only greatly reduces the cost of purified brine, and has reduced the discharging of industrial gaseous waste, has protected environment.
In a word, the present invention has improved existing intermittent type bittern purifying production technique, can reach energy-saving and cost-reducing purpose, can improve again the utilization ratio of equipment, simultaneously, can reduce exhaust gas emission again.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, be described in detail as follows:
The continuous bittern purifying production technique of a kind of lime-saltcake-flue gas method comprises the following steps of carrying out continuously:
One) lime making beating passes into the causticizing reaction tank with excessive 2% the lime supernatant liquid of being not more than, and simultaneously, passes into bittern and excessive 2% the saltcake solution that is not more than, to remove the Ca in the bittern
2+And Mg
2+In causticizing reaction, stir; After fully reacting, obtain reaction and finish slurries;
Two) reaction is finished slurries and carried out sedimentation, obtain supernatant liquid after the sedimentation; Sedimentation lower floor mud is passed into the mud ditch;
Three) make after the sedimentation supernatant liquid and purify rear pass gas and carry out carburizing reagent, again remove Ca
2+, to obtain carburizing reagent and finish slurries, the intake by control stack gas makes carburizing reagent finish the PH=7 of slurries～9;
Four) carburizing reagent is finished slurries and carried out sedimentation, obtain supernatant liquid behind the secondary settlement, supernatant liquid is the bittern of purification behind the secondary settlement, can directly go to the vacuum salt production system.
In the present embodiment, above-mentioned steps two) and step 4) all in the mud subsider, carry out.Above-mentioned steps one) concentration of lime supernatant liquid is 1～3g/l in.Above-mentioned steps three) CO in the stack gas
2Concentration be 8%-18%.
Although invention has been described in conjunction with the preferred embodiments for the above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (4)
1. the continuous bittern purifying production technique of lime-saltcake-flue gas method is characterized in that, comprises the following steps of carrying out continuously:
One) lime making beating passes into the causticizing reaction tank with excessive 2% the lime supernatant liquid of being not more than, and simultaneously, passes into bittern and excessive 2% the saltcake solution that is not more than, to remove the Ca in the bittern
2+And Mg
2+In causticizing reaction, stir; After fully reacting, obtain reaction and finish slurries;
Two) reaction is finished slurries and carried out sedimentation, obtain supernatant liquid after the sedimentation;
Three) make after the sedimentation supernatant liquid and purify rear pass gas and carry out carburizing reagent, again remove Ca
2+, to obtain carburizing reagent and finish slurries, the intake by control stack gas makes carburizing reagent finish the PH=7 of slurries～9;
Four) carburizing reagent is finished slurries and carried out sedimentation, obtain supernatant liquid behind the secondary settlement, be the bittern of purification.
2. the continuous bittern purifying production technique of described lime-saltcake-flue gas method according to claim 1 is characterized in that described step 2) and step 4) all in the mud subsider, carry out.
3. the continuous bittern purifying production technique of described lime-saltcake-flue gas method according to claim 1 is characterized in that described step 1) in the concentration of lime supernatant liquid be 1～3g/l.
4. according to claim 1 or the continuous bittern purifying production technique of 3 described lime-saltcake-flue gas methods, it is characterized in that described step 3) CO in the stack gas
2Concentration be 8%-18%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105812567A CN103011204A (en) | 2012-12-28 | 2012-12-28 | Continuous brine purification and production technique based on lime-mirabilite-flue gas method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105812567A CN103011204A (en) | 2012-12-28 | 2012-12-28 | Continuous brine purification and production technique based on lime-mirabilite-flue gas method |
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| CN103011204A true CN103011204A (en) | 2013-04-03 |
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| CN2012105812567A Pending CN103011204A (en) | 2012-12-28 | 2012-12-28 | Continuous brine purification and production technique based on lime-mirabilite-flue gas method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303943A (en) * | 2013-06-06 | 2013-09-18 | 中国轻工业长沙工程有限公司 | Purifying process of mirabilite type brine by adopting lime-carbon dioxide process |
| CN103482655A (en) * | 2013-06-06 | 2014-01-01 | 中国轻工业长沙工程有限公司 | Lime-sodium sulfate-carbon dioxide method used for purifying calcium chloride type bittern |
| CN104692417A (en) * | 2015-02-12 | 2015-06-10 | 中盐金坛盐化有限责任公司 | Brine purification process adopting lime-flue gas method |
| CN111056611A (en) * | 2019-12-18 | 2020-04-24 | 中盐金坛盐化有限责任公司 | Application of high-salt and high-nitrate waste liquid purified by flue gas method and detection method of nitrite root and nitrate radical |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7132052B2 (en) * | 2003-12-11 | 2006-11-07 | General Electric Company | System for the purification and reuse of spent brine in a water softener |
| CN101139101A (en) * | 2007-06-23 | 2008-03-12 | 中盐制盐工程技术研究院 | Method for removing magnesium ion and calcium ion in middle-degree brine in salt-field |
| CN101289200A (en) * | 2007-04-16 | 2008-10-22 | 中国盐业总公司 | Technological process for purifying bittern |
-
2012
- 2012-12-28 CN CN2012105812567A patent/CN103011204A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7132052B2 (en) * | 2003-12-11 | 2006-11-07 | General Electric Company | System for the purification and reuse of spent brine in a water softener |
| CN101289200A (en) * | 2007-04-16 | 2008-10-22 | 中国盐业总公司 | Technological process for purifying bittern |
| CN101139101A (en) * | 2007-06-23 | 2008-03-12 | 中盐制盐工程技术研究院 | Method for removing magnesium ion and calcium ion in middle-degree brine in salt-field |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303943A (en) * | 2013-06-06 | 2013-09-18 | 中国轻工业长沙工程有限公司 | Purifying process of mirabilite type brine by adopting lime-carbon dioxide process |
| CN103482655A (en) * | 2013-06-06 | 2014-01-01 | 中国轻工业长沙工程有限公司 | Lime-sodium sulfate-carbon dioxide method used for purifying calcium chloride type bittern |
| CN104692417A (en) * | 2015-02-12 | 2015-06-10 | 中盐金坛盐化有限责任公司 | Brine purification process adopting lime-flue gas method |
| CN111056611A (en) * | 2019-12-18 | 2020-04-24 | 中盐金坛盐化有限责任公司 | Application of high-salt and high-nitrate waste liquid purified by flue gas method and detection method of nitrite root and nitrate radical |
| CN111056611B (en) * | 2019-12-18 | 2022-03-22 | 中盐金坛盐化有限责任公司 | Application of high-salt and high-nitrate waste liquid purified by flue gas method and detection method of nitrite root and nitrate radical |
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Application publication date: 20130403 |