CN108862330A - A method of peculiar smell in removal purified salt production - Google Patents
A method of peculiar smell in removal purified salt production Download PDFInfo
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- CN108862330A CN108862330A CN201810789941.6A CN201810789941A CN108862330A CN 108862330 A CN108862330 A CN 108862330A CN 201810789941 A CN201810789941 A CN 201810789941A CN 108862330 A CN108862330 A CN 108862330A
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- salt
- peculiar smell
- purified
- organic molecule
- small organic
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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
- C01D3/16—Purification by precipitation or adsorption
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C01P2006/65—Chroma (C*)
Abstract
The present invention provides a kind of method for removing peculiar smell in purified salt production, includes the following steps：Former brine removes the after-purification of insolubility impurity, it is blown into gas in purification process, part small organic molecule is removed by aeration, then flocculant is added in purification process makes the small organic molecule dissolved in water and the plasma to suspend in water be gathered into macromolecular mass precipitating, it stands, discharge precipitating, purified essence halogen carries out multiple-effect evaporation, it keeps small organic molecule non-cohesive in crystal salt by unsaturated method control row's mother liquor in Multi-effect Evaporation Processes, edible salt that meet national standards is obtained after pervaporation, crystallization.Method used in the present invention is physical method, avoids the addition of other substances, and production process is safe and environment-friendly and simple, intuitive, small investment, production cost is low, the finished product edible salt white appearance of production, 85% or more, free from extraneous odour, indices meet and are more than national standard whiteness.
Description
Technical field
The invention belongs to technical field of salt chemical industry, and in particular to a method of peculiar smell in removal purified salt production.
Background technique
Rock salt is in process of crustal movement, and seawater, the lake moisture wrapped constantly evaporates formation, seawater, lake
Comparison of ingredients is complicated, containing many kinds of substance, including people, the excrement of animal, corpse and other vegetation.This special formation of rock salt
Process is the true cause place for causing salt to generate peculiar smell.To salt mine salt layer analysis find, if at salt period environment compared with
Upheaval, for the shallow-water environment containing organic matter, the organisms such as animals and plants in water after death rot residual wherein, crustal subsidence,
A large amount of organic matters are released in deposition process, are slowly stored in rock salt or mud salt.Since the water solubility of these organic matters is poor,
They can be enriched in same layer, with the evaporation of moisture, just be concentrated between salt and salt deposit.
In the recovery process of salt, when rock salt washed away by fresh water, dissolves, the organic matter of low carbon chain has faint water solubility,
Just enter in salt making system with brine, finished product salt produced contains faint " peculiar smell ", and people can smell when reaching a certain concentration
Taste.Since the boiling point of the type organic is at 160 DEG C --- between 250 DEG C, from being evaporated to dry temperature all in salt making system
This range is not achieved, they cannot be evaporated and be removed.Instead, in entire evaporation process, the concentration of organic matter is continuously increased,
The peculiar smell for ultimately causing salt slurry is maximum.Salt slurry is by dehydration, drying, though peculiar smell is slowed down under drying drum wind action,
A certain amount of peculiar smell is still remained in finished product salt.
The method of peculiar smell has absorption method and method of chemical treatment in common removal purified salt production, and absorption method is to utilize activity
Carbon or organic colloid are filtered brine, adsorb small organic molecule, and this method input cost is high, and operating cost is high.Chemistry
Facture is to carry out oxidation processes to small organic molecule by the way that strong oxidizer is added in finished product salt, and this method is in finished product salt
Exogenous chemical substance is introduced, food production requirement is not met.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems of the prior art, a kind of removing purified salt is provided and was produced
The method of the peculiar smell generated in journey.
To achieve the above object, the present invention adopts the following technical scheme that：A method of peculiar smell in removal purified salt production,
Include the following steps：Former brine removes the after-purification of insolubility impurity, and gas is blown into purification process and is removed by aeration
Part small organic molecule, flocculant is then added in purification process makes the small organic molecule dissolved in water and suspends in water
Plasma be gathered into macromolecular mass precipitating, stand, discharge precipitating, it is purified essence halogen carry out multiple-effect evaporation, multiple-effect steam
Keep small organic molecule non-cohesive in crystal salt by unsaturated method control row's mother liquor during hair, through pervaporation, crystallization
After obtain edible salt that meet national standards.
Preferably, the method for removing peculiar smell in purified salt production, includes the following steps：Former brine passes through first class reaction pot
Enter in second order reaction tank after removing insolubility impurity and purify, gas is blown into second order reaction tank and passes through aeration removing unit
Divide small organic molecule, flocculant is then added in second order reaction tank makes the small organic molecule dissolved in water and suspend in water
Plasma be gathered into macromolecular mass precipitating, stand, precipitating passes through slush pump with mud and pumps to Dorr thickener, then
It is discharged into abandoned well, the smart halogen come out from second order reaction tank enters five effect vacuum evaporators, imitates vacuum evaporator five
In keep small organic molecule non-cohesive in crystal salt by unsaturated method control row's mother liquor, obtained after pervaporation, crystallization
Edible salt that meet national standards.
Preferably, brine time of repose is 2-3 hours.
Preferably, gas used in aeration is carbon dioxide gas, extracted using carbon-dioxide gas compressor by net
Boiler smoke after change, boiler smoke is passed through in purification reaction, is detected pH value with pH meter after ventilation, is stopped when pH value is less than 7
Only it is passed through carbon dioxide.
Preferably, flocculant is polyacrylamide of the molecular weight 5,000,000 or more.
Unsaturated method includes the following steps：The mother liquor that upper one imitates is discharged into next effect, while every increasing by the 10% of total feed
An effect discharge amount is added to increase by 10%, five effect discharge amounts are successively 10%, 20%, 30%, 40%, the 50% of inlet amount, the mother of last effect
Liquid is drained into bittern purifying second order reaction tank and is refined again.
The beneficial effects of the present invention are：The present invention is by using aeration, flocculant sedimentation and unsaturated three kinds of method
Method jointly controls, and peculiar smell present in former halogen can be effectively removed in aeration and flocculant sedimentation, in five effect evaporation systems
Concentration of the small organic molecule in tank can effectively be controlled using unsaturated method control mother liquor discharge in system, guarantee that small molecule is dense
Degree produces under the premise of not causing finished product salt peculiar smell, and used method is physical method, avoids adding for other substances
Enter, production process is safe and environment-friendly and simple, intuitive, and small investment, production cost is low, the finished product edible salt white appearance of production, white
85% or more, free from extraneous odour, indices meet and are more than national standard degree.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1
The method that the present embodiment removes peculiar smell in purified salt production, includes the following steps：After former brine removes insolubility impurity
Purification is blown into gas by aeration in purification process and removes part small organic molecule, taken out using carbon-dioxide gas compressor
It takes by purified boiler smoke, boiler smoke is passed through in second order reaction tank, detect pH value with pH meter after ventilation, work as pH value
Stop being passed through carbon dioxide when less than 7；Then in purification process be added flocculant make the small organic molecule dissolved in water and
The plasma to suspend in water is gathered into macromolecular mass precipitating, stands, discharge precipitating, and purified essence halogen carries out multiple-effect evaporation,
Keep small organic molecule non-cohesive in crystal salt by unsaturated method control row's mother liquor in Multi-effect Evaporation Processes, by steaming
Edible salt that meet national standards is obtained after hair, crystallization.
Flocculant is polyacrylamide of the molecular weight 5,000,000 or more.
Unsaturated method includes the following steps：The mother liquor that upper one imitates is discharged into next effect, while every increasing by the 10% of total feed
An effect discharge amount is added to increase by 10%, five effect discharge amounts are successively 10%, 20%, 30%, 40%, the 50% of inlet amount, the mother of last effect
Liquid is drained into bittern purifying second order reaction tank and is refined again.
Embodiment 2
The present embodiment removes the process flow of peculiar smell in purified salt production as shown in Figure 1, former halogen is non-by first class reaction pot removing
Enter in second order reaction tank after soluble impurity and purify, carbon dioxide gas is blown into second order reaction tank and is removed by aeration
Part small organic molecule is extracted using carbon-dioxide gas compressor and passes through purified boiler smoke, boiler smoke is passed through two
In order reaction tank, pH value is detected with pH meter after ventilation, stops being passed through carbon dioxide when pH value is less than 7；Then in second order reaction
Flocculant is added in tank makes the small organic molecule dissolved in water and the plasma to suspend in water be gathered into macromolecular mass precipitating,
It stands, precipitating passes through slush pump with mud and pumps to Dorr thickener, then drains into abandoned well；Go out from second order reaction tank
The smart halogen come enters five effect vacuum evaporators, keeps small by unsaturated method control row's mother liquor in five effect vacuum evaporators
Molecular organic is non-cohesive in crystal salt, and the salt after pervaporation enters salt slurry bucket, is then centrifuged by centrifuge, drying bed
Edible salt that meet national standards is obtained after drying.
Flocculant is polyacrylamide of the molecular weight 5,000,000 or more.
Unsaturated method includes the following steps：The mother liquor that upper one imitates is discharged into next effect, while every increasing by the 10% of total feed
An effect discharge amount is added to increase by 10%, five effect discharge amounts are successively 10%, 20%, 30%, 40%, the 50% of inlet amount, the mother of last effect
Liquid is drained into bittern purifying second order reaction tank and is refined again.
Embodiment 3
The method that the present embodiment removes peculiar smell in purified salt production, includes the following steps：Former halogen removes non-by first class reaction pot
Enter in second order reaction tank after soluble impurity and purify, carbon dioxide gas is blown into second order reaction tank and is removed by aeration
Part small organic molecule is extracted using carbon-dioxide gas compressor and passes through purified boiler smoke, boiler smoke is passed through two
In order reaction tank, pH value is detected with pH meter after ventilation, stops being passed through carbon dioxide when pH value is less than 7；Then in second order reaction
Flocculant is added in tank makes the small organic molecule dissolved in water and the plasma to suspend in water be gathered into macromolecular mass precipitating,
2 hours are stood, precipitating passes through slush pump with mud and pumps to Dorr thickener, then drains into abandoned well；From second order reaction
The smart halogen come out in tank enters five effect vacuum evaporators, passes through unsaturated method control row's mother liquor in five effect vacuum evaporators
It keeps small organic molecule non-cohesive in crystal salt, edible salt that meet national standards is obtained after pervaporation, crystallization.
Flocculant is polyacrylamide of the molecular weight 5,000,000 or more.
Unsaturated method includes the following steps：The mother liquor that upper one imitates is discharged into next effect, while every increasing by the 10% of total feed
An effect discharge amount is added to increase by 10%, five effect discharge amounts are successively 10%, 20%, 30%, 40%, the 50% of inlet amount, the mother of last effect
Liquid is drained into bittern purifying second order reaction tank and is refined again.
Embodiment 4
The method that the present embodiment removes peculiar smell in purified salt production, includes the following steps：Former halogen removes non-by first class reaction pot
Enter in second order reaction tank after soluble impurity and purify, carbon dioxide gas is blown into second order reaction tank and is removed by aeration
Part small organic molecule is extracted using carbon-dioxide gas compressor and passes through purified boiler smoke, boiler smoke is passed through two
In order reaction tank, pH value is detected with pH meter after ventilation, stops being passed through carbon dioxide when pH value is less than 7；Then in second order reaction
Flocculant is added in tank makes the small organic molecule dissolved in water and the plasma to suspend in water be gathered into macromolecular mass precipitating,
3 hours are stood, precipitating passes through slush pump with mud and pumps to Dorr thickener, then drains into abandoned well；From second order reaction
The smart halogen come out in tank enters five effect vacuum evaporators, passes through unsaturated method control row's mother liquor in five effect vacuum evaporators
It keeps small organic molecule non-cohesive in crystal salt, edible salt that meet national standards is obtained after pervaporation, crystallization.
Flocculant is polyacrylamide of the molecular weight 5,000,000 or more.
Unsaturated method includes the following steps：The mother liquor that upper one imitates is discharged into next effect, while every increasing by the 10% of total feed
An effect discharge amount is added to increase by 10%, five effect discharge amounts are successively 10%, 20%, 30%, 40%, the 50% of inlet amount, the mother of last effect
Liquid is drained into bittern purifying second order reaction tank and is refined again.
Jointly control by using aeration, flocculant sedimentation and unsaturated three kinds of methods of method and eliminates the unusual smell and can effectively go
Except the peculiar smell in former halogen, the finished product salt white appearance produced when three kinds of methods use simultaneously in production, whiteness 85% with
On, free from extraneous odour, indices meet and are more than national standard.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art, the present invention
It is not restricted to the described embodiments, under the premise of not departing from general idea of the present invention, several changes and improvements can also be made,
These also should be considered as protection scope of the present invention.
Claims (6)
1. a kind of method of peculiar smell in removal purified salt production, it is characterised in that：Include the following steps：Former brine removes insoluble
Property impurity after-purification, be blown into purification process gas by aeration remove part small organic molecule, then cleaned
Flocculant is added in journey makes the small organic molecule dissolved in water and the plasma to suspend in water be gathered into macromolecular mass precipitating,
It stands, discharge precipitating, purified essence halogen carries out multiple-effect evaporation, passes through unsaturated method control row's mother liquor in Multi-effect Evaporation Processes
It keeps small organic molecule non-cohesive in crystal salt, edible salt that meet national standards is obtained after pervaporation, crystallization.
2. removing the method for peculiar smell in purified salt production as described in claim 1, it is characterised in that：Include the following steps：It is former
Brine enters in second order reaction tank after first class reaction pot removes insolubility impurity to be purified, and is blown into gas in second order reaction tank
Body removes part small organic molecule by aeration, and flocculant is then added in second order reaction tank makes small point dissolved in water
The plasma to suspend in sub- organic matter and water is gathered into macromolecular mass precipitating, stands, and precipitating passes through slush pump with mud
It pumping to Dorr thickener, then drains into abandoned well, the smart halogen come out from second order reaction tank enters five effect vacuum evaporators,
Keep small organic molecule non-cohesive in crystal salt by unsaturated method control row's mother liquor in five effect vacuum evaporators, warp
Edible salt that meet national standards is obtained after pervaporation, crystallization.
3. removing the method for peculiar smell in purified salt production as claimed in claim 2, it is characterised in that：Brine time of repose is
2-3 hours.
4. removing the method for peculiar smell in purified salt production as claimed in claim 2, it is characterised in that：Used in the aeration
Gas is carbon dioxide gas, is extracted using carbon-dioxide gas compressor and passes through purified boiler smoke, boiler smoke is passed through
In purification reaction, pH value is detected with pH meter after ventilation, stops being passed through carbon dioxide when pH value is less than 7.
5. removing the method for peculiar smell in purified salt production as claimed in claim 2, it is characterised in that：The flocculant is molecule
Measure the polyacrylamide 5,000,000 or more.
6. removing the method for peculiar smell in purified salt production as claimed in claim 2, it is characterised in that：It is described unsaturation method include
Following steps：The mother liquor that upper one imitates is discharged into next effect by the 10% of total feed, while every effect discharge amount that increases increases by 10%,
Five effect discharge amounts are successively 10%, 20%, 30%, 40%, the 50% of inlet amount, and it is anti-that the mother liquor of last effect drains into bittern purifying second level
It answers in tank and is refined again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810789941.6A CN108862330B (en) | 2018-07-18 | 2018-07-18 | Method for removing peculiar smell in refined salt production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810789941.6A CN108862330B (en) | 2018-07-18 | 2018-07-18 | Method for removing peculiar smell in refined salt production |
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| Publication Number | Publication Date |
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| CN108862330A true CN108862330A (en) | 2018-11-23 |
| CN108862330B CN108862330B (en) | 2021-06-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112830505A (en) * | 2021-01-08 | 2021-05-25 | 中盐金坛盐化有限责任公司 | Method for purifying salt mother liquor slurry by flue gas method |
| CN113331389A (en) * | 2021-06-23 | 2021-09-03 | 中盐河南盐业物流配送有限公司 | Salt for soy sauce |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214975A (en) * | 2008-01-21 | 2008-07-09 | 上海西恩化工设备有限公司 | Advanced treatment technique for brine |
| CN103288104A (en) * | 2013-06-26 | 2013-09-11 | 河南城建学院 | Method for removing odor of refined salt through ferric salt |
-
2018
- 2018-07-18 CN CN201810789941.6A patent/CN108862330B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214975A (en) * | 2008-01-21 | 2008-07-09 | 上海西恩化工设备有限公司 | Advanced treatment technique for brine |
| CN103288104A (en) * | 2013-06-26 | 2013-09-11 | 河南城建学院 | Method for removing odor of refined salt through ferric salt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112830505A (en) * | 2021-01-08 | 2021-05-25 | 中盐金坛盐化有限责任公司 | Method for purifying salt mother liquor slurry by flue gas method |
| CN113331389A (en) * | 2021-06-23 | 2021-09-03 | 中盐河南盐业物流配送有限公司 | Salt for soy sauce |
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| Publication number | Publication date |
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| CN108862330B (en) | 2021-06-15 |
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