CN107540072A - A kind of flocculant solution preparation method and bittern purifying method - Google Patents
A kind of flocculant solution preparation method and bittern purifying method Download PDFInfo
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- CN107540072A CN107540072A CN201710838576.9A CN201710838576A CN107540072A CN 107540072 A CN107540072 A CN 107540072A CN 201710838576 A CN201710838576 A CN 201710838576A CN 107540072 A CN107540072 A CN 107540072A
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- bittern
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Abstract
A kind of preparation method of flocculant solution, is formulated using organic polymer coargulator, and solvent is added into liquid agitator processed, and organic polymer coargulator is added during solvent is added, and is stirred and is made after the completion of charging, solvent for use is smart halogen.The invention further relates to a kind of bittern purifying method, comprise the following steps：（1）First class purification, quick lime is added into bittern；（2）Secondary purification, flue gas is added into bittern；Flocculant solution made from aforementioned preparation process is added into bittern and stir a period of time, the smart halogen after then sedimentation is purified after secondary purification.Mixed by macromolecule organic flocculating agent with smart halogen, reduce the compound concentration of macromolecule organic flocculating agent solution；And use smart halogen to be used as solvent, and will not be toward more fresh water be brought in bittern into, i.e. the concentration of maintenance bittern is constant, avoids adversely affecting to follow-up salt manufacturing evaporization process.
Description
Technical field
The present invention relates to food chemistry technical field, more particularly, to brine purifying technique.
Background technology
Needing bittern carrying out purified treatment before evaporation salt manufacturing, lime-flue gas method is a kind of halogen water purification method, point
For first class purification and secondary purification, quick lime is added in first class purification（CaO）, remove the Mg in former halogen2+, the OH of generation-Make
For the raw material in secondary purification；In secondary purification, the flue gas of boiler of power plant is added, utilizes CO therein2With OH-Reaction, and
Ca in bittern2+Generate CaCO3Precipitation, to reach removal of impurity Ca2+Purpose.Reaction equation is as follows：
First order reaction CaO+H2O = Ca(OH) 2
Ca(OH)2 + MgSO4 = CaSO4↓+ Mg(OH)2↓
Ca(OH)2 + Na2SO4 = 2NaOH + CaSO4↓
Second order reaction 2NaOH+CO2= Na2CO3 + H2O
Ca2++ Na2CO3 =CaCO3↓+2 Na+
In second order reaction, CaCO3It is to be generated by chemical method, caused particle is small, and only tens, more than ten is even several
Individual micron, if by natural subsidence, it is necessary to take a long time, so it is heavy to be typically necessary addition flocculant auxiliary
Drop.A kind of such as lime-sodium sulphate-carbon dioxide process chlorine disclosed in the application for a patent for invention that publication No. is the A of CN 103482655
Change calcium type bittern purifying technique, including（1）The preparation of milk of lime；（2）The preparation of sodium sulphate suspension；（3）Two level flocculant is molten
The preparation of liquid；（4）First order reaction；（5）The preparation of carbon dioxide；（6）The preparation of two level flocculant solution；（7）Second order reaction.
In original secondary purification, CaCO3The sedimentation of particle is to add flocculant to aid in settling, and its principle is：Flocculant
Hydrolyze in the solution, strand is launched into long chain, and CaCO is caught by the group on chain3Particle.
But the effect of this method is unsatisfactory, still there is substantial portion of particle to be suspended among smart halogen, pass through inspection
Survey, its water-insoluble（Substantially CaCO3）Content is between 50-200mg/L, it is difficult to which precipitation removes completely.Wadded a quilt with cotton by reducing
The concentration of solidifying agent solution, is advantageous to the expansion of flocculating agent molecule chain, but can bring substantial amounts of water into bittern, influences follow-up system
Salt evaporates, and increases cost.
The content of the invention
The technical problem to be solved in the present invention is：A kind of overcome the deficiencies in the prior art, there is provided preparation of flocculant solution
Method and a kind of bittern purifying method, the concentration of flocculant solution is reduced, promote the expansion of flocculating agent molecule chain, while to follow-up
Salt manufacturing evaporation have no adverse effect.
The technical solution adopted for the present invention to solve the technical problems is：A kind of preparation method of flocculant solution, use
Organic polymer coargulator is formulated, and solvent is added into liquid agitator processed, is added during solvent is added organic
High polymer coagulant, stir and be made after the completion of charging, solvent for use is smart halogen.
The macromolecule organic flocculating agent is polyacrylamide or Sodium Polyacrylate.
Preferably, the configuration proportion of flocculant solution（Mass percent）For 0.02~0.05%, mixing time is 1 ~ 2h.
Further, liquid agitator processed is controlled using DCS system, by presetting mixing time, whipping process in DCS system
It is automatically stopped after to the default time.
Present invention additionally comprises a kind of bittern purifying method, comprise the following steps：（1）First class purification, life is added into bittern
Lime；（2）Secondary purification, flue gas is added into bittern；Wadding made from preceding method is added into bittern after secondary purification
Solidifying agent solution simultaneously stirs a period of time, the smart halogen after then sedimentation is purified.
Preferably, the dosage that flocculant solution is added in bittern is 0.3 ~ 1ppm, and flocculant solution is added after secondary purification
Mixing time be 10 ~ 60min.
Sedimentation time is 4 ~ 6h.
Further, the secondary purification is carried out in agitator is purified, and purification agitator is controlled using DCS system, is passed through
Mixing time is preset in DCS system, is automatically stopped after whipping process to default time.
Further, the inner side bucket wall for purifying agitator is provided with deflection plate fixed mount vertically, is fixed with deflection plate fixed mount
Some horizontal stands.Stir after stopping, the horizontal stand number being clearly observable by confirmation, assess the clean-up effect of bittern.
Beneficial effects of the present invention：
Mixed by macromolecule organic flocculating agent with smart halogen, reduce the compound concentration of macromolecule organic flocculating agent solution；And use
Smart halogen will not maintain the concentration of bittern constant, avoid to follow-up system as solvent toward more fresh water are brought into bittern
Salt evaporization process adversely affects.
Brief description of the drawings
The equipment used in Fig. 1-embodiment feeds schematic diagram.
In figure：1-liquid agitator processed, 2-flocculant pump, 3-purification agitator, 4-deflection plate fixed mount, 5-water
Flat support, 6-deflection plate.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
（1）The preparation of equipment：
Connected as shown in figure 1, the equipment used includes liquid agitator 1 processed, flocculant pump 2 and purification agitator 3, flocculant pump 2
Between liquid agitator 1 processed and purification agitator 3.
Liquid agitator 1, flocculant pump 2 and purification agitator 3 processed are controlled using DSC systems, purify the inner side of agitator 3
Bucket wall is provided with deflection plate fixed mount 4 vertically, and some horizontal stands 5 are fixed with deflection plate fixed mount 4.
（2）Prepare flocculant solution：
Open the agitator of liquid agitator 1 processed, toward liquid agitator 1 processed in add half barrel of smart halogen, then toward continuously adding essence in bucket
Halogen and polyacrylamide after the completion of charging, persistently stir 1h to bucketful.
（3）Bittern purifying：
After being passed through flue gas to purification agitator 3, flocculant solution is added, while opens the agitator of purification agitator 2, flocculation
Agent solution addition is completed, and continues to stop after stirring 15min.After settlement, supernatant liquor is the smart halogen after purifying.
During flocculant solution is prepared, when flocculant concentration is higher, easily there is flocculation block, influence sedimentation effect
Fruit.In the present embodiment, the flocculant of caking can all float over liquid level, easily be found by observing；It can see in purification agitator 3
The number of horizontal stand 5 can learn that the amount, liquid mixing time processed, purification that flocculant solution adds purification agitator 3 are stirred by range estimation
Mix the time is controlled by DCS system, and its turbidity is detected by transmissometer（NTU）, water therein is detected by gravimetric method filtering
Insolubles content（mg/L）.
It is as follows that specific flocculant solution prepares parameter：
Implement respectively 5 times for each project, data result is as follows：
It can be drawn by list data, compared with water is as the flocculant solution of solvent, using smart halogen as flocculant solution
Solvent, it is not easy to lump, and purify obtain smart halogen visibility it is higher, the content of water-insoluble is lower, i.e., using smart halogen as
Solvent, clean-up effect are more preferable.In addition, also without the more energy of consumption in follow-up salt manufacturing evaporation process, it is cost-effective.
The operation principle of the present invention：
Macromolecule organic flocculating agent hydrolyzes in the solution, and strand is launched into long chain, the macromolecule used in present embodiment
Organic flocculant is polyacrylamide, and the amide group on chain catches CaCO3Particle, thousands of individual groups up to a hundred catch thousands of up to a hundred
Individual CaCO3Particle, due to forming chemical combination key reason, the CaCO finally captured3It is bigger that particle can be gathered into a particle
CaCO3Particle so that particle sedimentation is quicker.
Low concentration environmental benefits are in the expansion of macromolecule organic flocculating agent strand.Pass through macromolecule organic flocculating agent and essence
Halogen mixes, and reduces the compound concentration of macromolecule organic flocculating agent solution；And smart halogen is used as solvent, will not be toward bringing into bittern
More fresh water, avoid adversely affecting to follow-up salt manufacturing evaporization process.And fresh water is used then to be influenceed as solvent
Salt manufacturing evaporation below, increases cost.
Liquid agitator 1, flocculant pump 2 and purification agitator 3 processed are controlled by DCS system, and flocculant easy to operation is molten
Liquid adds the amount, liquid mixing time processed and purification mixing time of purification agitator 3.
The configuration proportion of flocculant is 0.02~0.05%, and mixing time is 1 ~ 2h.Configuration proportion is too high, easily wads a quilt with cotton
Grumeleuse, influence effect of settling.Mixing time is too short, skewness of the flocculant in smart halogen；Mixing time is long, easily handle
Strand interrupts so that molecular weight reduces, and reduces and catches CaCO3The ability of particle, influence help heavy effect.
The inner side bucket wall of purification agitator 3 is provided with deflection plate fixed mount 4 vertically, is fixed with deflection plate fixed mount 4 some
Horizontal stand 5, horizontal stand 5 not only possess the function of support deflection plate 6, and the flat branch of energy water breakthrough in agitator 3 is purified by estimating
The number of frame 5, it may also be used for assess the clean-up effect of bittern.
Claims (10)
1. a kind of preparation method of flocculant solution, is formulated using organic polymer coargulator, add into liquid agitator processed
Enter solvent, organic polymer coargulator is added during solvent is added, stir and be made after the completion of charging, its feature exists
In solvent for use is smart halogen.
2. the preparation method of flocculant solution as claimed in claim 1, it is characterised in that the configuration proportion of flocculant（Quality hundred
Divide ratio）For 0.02~0.05%, mixing time is 1 ~ 2h.
3. the preparation method of flocculant solution as claimed in claim 1 or 2, it is characterised in that the macromolecule organic flocculating agent
For polyacrylamide or Sodium Polyacrylate.
4. the preparation method of flocculant solution as claimed in claim 1 or 2, it is characterised in that liquid agitator processed uses DCS system
Control, by presetting mixing time in DCS system, it is automatically stopped after whipping process to default time.
5. a kind of bittern purifying method, comprises the following steps：（1）First class purification, quick lime is added into bittern；（2）Two level is net
Change, flue gas is added into bittern；Characterized in that, claim 1 ~ 4 methods described is added into bittern after secondary purification
Obtained flocculant solution simultaneously stirs a period of time, the smart halogen after then sedimentation is purified.
6. bittern purifying method as claimed in claim 5, it is characterised in that the dosage that flocculant solution is added in bittern is 0.3 ~
1ppm, the mixing time that flocculant solution is added after secondary purification is 10 ~ 60min.
7. the bittern purifying method as described in claim 5 or 6, it is characterised in that the sedimentation time is 4 ~ 6h.
8. the bittern purifying method as described in claim 5 or 6, it is characterised in that the secondary purification enters in agitator is purified
OK, purify agitator to control using DCS system, by presetting mixing time, whipping process to default time in DCS system
After be automatically stopped.
9. bittern purifying method as claimed in claim 8, it is characterised in that the inner side bucket wall of used purification agitator is vertical
Provided with deflection plate fixed mount, some horizontal stands are fixed with deflection plate fixed mount.
10. bittern purifying method as claimed in claim 9, it is characterised in that after stirring stops, by confirming what is be clearly observable
Horizontal stand number, assess the clean-up effect of bittern.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710838576.9A CN107540072A (en) | 2017-09-18 | 2017-09-18 | A kind of flocculant solution preparation method and bittern purifying method |
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| CN201710838576.9A CN107540072A (en) | 2017-09-18 | 2017-09-18 | A kind of flocculant solution preparation method and bittern purifying method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626688A (en) * | 2018-12-10 | 2019-04-16 | 中盐枣阳盐化有限公司 | It is a kind of do not purify under the conditions of middle less salt nitre compare brine concentration method |
| CN110236170A (en) * | 2019-06-06 | 2019-09-17 | 益盐堂（应城）健康盐制盐有限公司 | A kind of preparation method of edible salt |
| CN114573004A (en) * | 2022-03-23 | 2022-06-03 | 河南平煤神马天泰盐业有限公司 | Production process of additive-free small-particle salt |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289200A (en) * | 2007-04-16 | 2008-10-22 | 中国盐业总公司 | Technological process for purifying bittern |
| CN103318995A (en) * | 2013-05-29 | 2013-09-25 | 武汉工程大学 | Method for improving industrial waste alkali residue slurry flocculation effect |
| CN105858963A (en) * | 2016-05-16 | 2016-08-17 | 中盐金坛盐化有限责任公司 | Method for removing iron ions from sodium sulfate type brine |
| CN106986356A (en) * | 2017-05-12 | 2017-07-28 | 江西晶昊盐化有限公司 | A kind of lime-flue gas bittern purifying method |
-
2017
- 2017-09-18 CN CN201710838576.9A patent/CN107540072A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289200A (en) * | 2007-04-16 | 2008-10-22 | 中国盐业总公司 | Technological process for purifying bittern |
| CN103318995A (en) * | 2013-05-29 | 2013-09-25 | 武汉工程大学 | Method for improving industrial waste alkali residue slurry flocculation effect |
| CN105858963A (en) * | 2016-05-16 | 2016-08-17 | 中盐金坛盐化有限责任公司 | Method for removing iron ions from sodium sulfate type brine |
| CN106986356A (en) * | 2017-05-12 | 2017-07-28 | 江西晶昊盐化有限公司 | A kind of lime-flue gas bittern purifying method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626688A (en) * | 2018-12-10 | 2019-04-16 | 中盐枣阳盐化有限公司 | It is a kind of do not purify under the conditions of middle less salt nitre compare brine concentration method |
| CN110236170A (en) * | 2019-06-06 | 2019-09-17 | 益盐堂（应城）健康盐制盐有限公司 | A kind of preparation method of edible salt |
| CN114573004A (en) * | 2022-03-23 | 2022-06-03 | 河南平煤神马天泰盐业有限公司 | Production process of additive-free small-particle salt |
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Application publication date: 20180105 |