CN107162020A - A kind of production method of food-grade potassium chloride - Google Patents
A kind of production method of food-grade potassium chloride Download PDFInfo
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- CN107162020A CN107162020A CN201710467915.7A CN201710467915A CN107162020A CN 107162020 A CN107162020 A CN 107162020A CN 201710467915 A CN201710467915 A CN 201710467915A CN 107162020 A CN107162020 A CN 107162020A
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- potassium chloride
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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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
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- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of production method of food-grade potassium chloride, mainly including the process such as high-temperature digestion, filtration, purification, continuous crystallisation, dehydration separation, dry.Food-grade potassium chloride obtained by this technique, product particle is big, uniformity is high, impurity content is low, can be packed without washing process convection drying, reduces technique consumption, and production cost is low.Because product granularity is big, main content is high, permanent place should not lump, and can realize the direct mixture manufacturing Cardia Salt with edible salt, or directly as the addition of food.This process equipment is simple, production procedure is short, non-environmental-pollution the problems such as, industrial applications value is high.
Description
Technical field
The present invention relates to the production technology of potassium chloride, more particularly to a kind of production technology of food-grade potassium chloride.
Background technology
Food-grade potassium chloride is general to be formed by industrial potassium chloride is refined, be mainly used as in food-processing industry for salt agent,
Nutritional supplement, gelling additive, also act as flavor enhancement, yeast food, fumet, pH value controlling agent etc. in addition.In food
Potassium chloride is typically used as the nutritional agents of potassium, compared with the sylvite nutritional agents of other forms, with price is low, potassium content is high, Yi Cun
The advantages of storage, thus food-grade potassium chloride used as the nutrition fortifier of potassium it is most extensive, in fermented food also can as hair
Ferment nutritional agents.Because potassium ion has very strong chelating and gelling characteristic, thus food-grade potassium chloride be also used in food when
Make gelling agent, food-grade potassium chloride is used as carragheen, gellan gum isocolloid food.
Food-grade potassium chloride can be used for agricultural byproducts, aquatic products, livestock products, fermentation product, seasoning as edible sodium chloride
Product, can, flavor enhancement of instant food etc., or prepare sports drink etc. for strengthening potassium.At present, food-grade potassium chloride is main
As raw materials for production, used with edible sodium chloride mixture manufacturing Cardia Salt product.
As the raw material of food-grade potassium chloride, industrial potassium chloride is mainly extracted from bittern, and KCE content typically exists
More than 90%, because wherein solvable and insoluble impurity content is higher, color is gloomy, and outward appearance is poor, it is impossible to be used as consumable products
Directly apply.The method of the current refined purification of industrial potassium chloride is mainly following two：
1. washing and screening method：Using saturated potassium chloride solution, industrial potassium chloride is sieved under certain solution temperature
Washing, removes the impurity particle thing screening of the soluble impurity in raw material and part physical property significant difference and potassium chloride, then pass through
Crossing solution cooling makes the potassium chloride in saturated solution crystallize precipitation, generates potassium chloride particle, so that food-grade potassium chloride is produced
The granularity of product meets the requirement of product quality, and the slurry after crystallization produces food-grade by being dehydrated the process such as separation, dry, packaging
Potassium chloride.Although the production technology energy consumption is relatively low, it is less than the limitation of sieving capacity, the tiny impurity of particle will bring finished product into
In, visible insoluble matter stain in finished product also needs to carry out hand picking again, production capacity is limited, manually as consumable products
Cost is higher, and product relative cost is high.
2nd, the complete molten recrystallization of raw material potassium chloride：Common potassium chloride is dissolved at normal temperatures, is configured to containing certain
The slurry of solid potassium chloride, carries out coarse filtration first, filters off wherein big insoluble matter impurity, and then heating makes the solid in slurry
Potassium chloride all dissolves, and is configured to the saturated potassium chloride solution under certain temperature, then by secondary filter, filters off tiny in material
Impurity obtains pure material solution, and material solution is evaporated, after certain temperature, cools down complete evaporation of liquid, potassium chloride knot
Partial crystallization goes out, and the slurry after crystallization produces food-grade potassium chloride by being dehydrated the process such as separation, dry, packaging again.The technique productions
Product it is pure white pure, insoluble impurities clearance is high, and product quality is relatively preferable.But because product particle is small, size distribution
The reasons such as width, it is easily hardened after product is placed for a long time, very big inconvenience is brought to later stage production and application.
The content of the invention
The problem of it is an object of the invention to solve in open production technology, a kind of work is provided for food-grade potassium chloride product
Skill is simple, stably, the production method that production cost is low, production capacity is high, products obtained therefrom is particle is uniform, particle diameter is larger high-end food
Grade potassium chloride product.
To realize that the technical scheme that the purpose of the present invention is used is：
A kind of production method of food-grade potassium chloride, the technique point following steps are implemented：
1) 95-115Kg 93% potassium chloride raw material is delivered and arrives 1m3In Klorvess Liquid, heated under stirring molten
Solve, be configured to 100-102 DEG C of saturated potassium chloride solution；
2) when solution temperature is increased to 103~105 DEG C, solution is subjected to filter operation while hot, limpid chlorination is obtained
The hot saturated solution of potassium, is stored in the dashpot with heat insulation function；
3) the hot saturated solution of potassium chloride after filtering is mixed with the overflowing liquid 30%-50% of two sections of discharges；
4) mixed liquor is continuously pumped into one section of continuous crystalizer, and feed liquid temperature is controlled under mixing condenser effect
60-65 DEG C of degree；
5) slurry from one section of crystallizer discharge is continuously transferred to two sections of crystallizers automatically, makees in mixing condenser and vavuum pump
With lower 35-40 DEG C of feed temperature of control；
6) the potassium chloride slurry that crystallization is completed is drained into centrifuge feeding trough, and centrifuge is sent into afterwards and carries out dehydrating operations,
Solid potassium chloride product and centrifuge mother liquor are obtained, solid goes drying into screw feeder, and centrifuge mother liquor and a small amount of overflowing liquid are defeated
The molten potassium of dissolving tank heating is sent to be recycled；
7) Potassium Chloride Product after centrifugal dehydration is done in vibrations fluid bed after heated-air drying, cold wind cooling
Dry Potassium Chloride Product, then enter packaging system after screening, obtain food-grade potassium chloride finished product.
Further, the step 4) in, mixed liquor is continuously pumped into one section of continuous crystalizer, cold mixing
0.080~0.084MPa of the lower control feed liquid vacuum of condenser effect.
Further, the step 5) in, two sections of crystallizers are continuously transferred to automatically from the slurry of one section of crystallizer discharge,
Mixing condenser and 0.094~0.096MPa of control feed liquid vacuum under vacuum pumping action.
The solution have the advantages that, include the innovative point of following technique：
1. using high-temperature digestion, crossing the saturated solution preparation technology of heat filtering, reduce production technology, production consumption and into
This is low；
2. using the chain mode of production of temperature control flow, production is stable, and automatization level is high；
3. using two sections of continuous crystallisations, set up overflowing liquid disappear it is brilliant, eluriate the functions such as leg, product particle can regulate and control, product
Homogeneous grain diameter degree is high；
4. making negative pressure low temperature environment using vavuum pump, temperature stabilization is controlled below 35 DEG C, is produced not by seasonal temperature
KCE content is low in control, circulation fluid, improves production capacity, and production efficiency is high；
Brief description of the drawings
Fig. 1 is present invention process FB(flow block).
Embodiment
Referring to accompanying drawing 1, the technique of two sections of continuous crystallisation food-grade potassium chlorides of the invention, mainly including high-temperature digestion, filtering
The process such as purification, continuous crystallisation, dehydration separation, dry, point following steps are implemented：
High-temperature digestion process：95-115Kg 93% potassium chloride raw material is delivered and arrives 1m3In Klorvess Liquid, in stirring shape
Dissolved by heating under state, be configured to 100-102 DEG C of saturated potassium chloride solution；
Filtration, purification process：When solution temperature is increased to 103~105 DEG C, solution is subjected to filter operation while hot, obtained
The hot saturated solution of limpid potassium chloride, is stored in standby in the dashpot with heat insulation function；
Continuous crystallisation process：The hot saturated solution of potassium chloride is continuously pumped into continuous crystalizer, one section of crystallizer
60-65 DEG C of the feed temperature of control (0.080~0.084MPa of vacuum) under mixing condenser effect, two sections of crystallizers are in vacuum
35-40 DEG C of feed temperature (0.094~0.096MPa of vacuum) is controlled under pumping action, saturated solution enters with two sections of part overflowing liquid
Enter after the mixing of row pipeline after one section of crystallizer, decrease temperature crystalline, the slurry containing certain solid content enters two sections of crystallizers, carry out
Regrowth is cooled down, obtains that particle is big and uniform potassium chloride slurry, from discharge gate discharge, the mother liquor isolated after crystallization is from upper
Portion's mother liquor mouthful discharge, returns to high-temperature digestion process, is used carrying out rising temperature for dissolving raw material potassium chloride；
It is dehydrated separation circuit：The potassium chloride slurry that crystallization is completed is drained into centrifuge feeding trough and carries out dehydrating operations, obtains
Solid potassium chloride product and centrifuge mother liquor, solid go drying into screw feeder, and centrifuge mother liquor and a small amount of overflowing liquid are transported to
The molten potassium of dissolving tank heating is recycled；When the sodium chloride in the mother liquor that cooler crystallizer and centrifuge are separated, magnesium sulfate, chlorine
It is when changing the content summation of magnesium more than 70g/l, then not recycled, raw material KCl production liquor evaporating plant is returned, production is used as
The raw produce of food potassium chloride use.
Dry packing process：Potassium Chloride Product after centrifugal dehydration drops in vibrations fluid bed by heated-air drying, cold wind
Wen Hou, obtains dry Potassium Chloride Product, then enters packaging system after screening, obtains food-grade potassium chloride finished product.
The advantage of technique：
1. using the potassium chloride raw material of main content 93%, with direct rising temperature for dissolving in circulation fluid mixed process, it is configured to 105
DEG C mistake hot solution (100 DEG C of saturated solutions), directly carry out filtration, purification operation, reduce evaporating concentration process, reduce
Steam consumption, using the higher raw material of purity, reduces mother liquor discharge number of times and discharge capacity, reduces production consumption and work is strong
Degree, production cost is low；
Halogen kettle equipment is converted 2. eliminating, reduces and nucleation probability is cooled down outside crystallizer；
3. controlling flow chain control using temperature, crystallizer feeding temperature is stabilized, solution degree of supersaturation is steady, favorably
In the growth of crystal grain；
4. using two sections of continuous crystallisations, reducing heat transfer temperature difference, reducing a large amount of nucleation probabilities of the rapid shwoot of hot material liquid, promote
The growth for entering crystal grain is grown up；
5. one section of overflowing liquid flows through heat exchange heating device, solution heating is played fine crystal elimination effect, reduced into two sections
Crystallizer nucleus quantity, promotes the growth of two sections of crystalline particles；
6. two sections of crystallizers expand vitellarium and settling section, elutriation leg is additionally arranged, it is ensured that potassium chloride in discharge slurry
The uniformity of the particle of product；
7. one section of crystallizer makes subnormal ambient using mixing condenser, on the premise of environment under low pressure is met, reduce
Production consumption, two sections add vavuum pump to make subnormal ambient using mixing condenser, and feed temperature is controlled in 35 DEG C -40 DEG C, vacuum
Environment is not influenceed by seasonal temperature, improves production capacity, reduces production consumption；
8. product average mean crystal size is in 0.5mm or so, minimum particle size control is in more than 0.25mm, and homogeneous grain diameterization is high,
The main content of product is high, and permanent placement is difficult hardened.
Claims (3)
1. a kind of production method of food-grade potassium chloride, it is characterised in that the technique point following steps are implemented：
1) 95-115Kg 93% potassium chloride raw material is delivered and arrives 1m3In Klorvess Liquid, dissolve by heating, match somebody with somebody under stirring
100-102 DEG C of saturated potassium chloride solution is made；
2) when solution temperature is increased to 103~105 DEG C, solution is subjected to filter operation while hot, limpid potassium chloride heat is obtained
Saturated solution, is stored in the dashpot with heat insulation function；
3) the hot saturated solution of potassium chloride after filtering is mixed with the overflowing liquid 30%-50% of two sections of discharges；
4) mixed liquor is continuously pumped into one section of continuous crystalizer, and feed temperature is controlled under mixing condenser effect
60-65℃；
5) slurry from one section of crystallizer discharge is continuously transferred to two sections of crystallizers automatically, under mixing condenser and vacuum pumping action
Control 35-40 DEG C of feed temperature；
6) the potassium chloride slurry that crystallization is completed is drained into centrifuge feeding trough, and centrifuge is sent into afterwards and carries out dehydrating operations, is obtained
Solid potassium chloride product and centrifuge mother liquor, solid go drying into screw feeder, and centrifuge mother liquor and a small amount of overflowing liquid are transported to
The molten potassium of dissolving tank heating is recycled；
7) Potassium Chloride Product after centrifugal dehydration obtains drying in vibrations fluid bed after heated-air drying, cold wind cooling
Potassium Chloride Product, then enter packaging system after screening, obtain food-grade potassium chloride finished product.
2. the production method of food-grade potassium chloride as claimed in claim 1, it is characterised in that the step 4) in, mixed liquor
Continuously be pumped into one section of continuous crystalizer, under mixing condenser effect control feed liquid vacuum 0.080~
0.084MPa。
3. the production method of food-grade potassium chloride as claimed in claim 1, it is characterised in that the step 5) in, from one section
The slurry of crystallizer discharge is continuously transferred to two sections of crystallizers automatically, and feed liquid vacuum is controlled under mixing condenser and vacuum pumping action
Spend 0.094~0.096MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467915.7A CN107162020A (en) | 2017-06-20 | 2017-06-20 | A kind of production method of food-grade potassium chloride |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467915.7A CN107162020A (en) | 2017-06-20 | 2017-06-20 | A kind of production method of food-grade potassium chloride |
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| CN107162020A true CN107162020A (en) | 2017-09-15 |
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| CN201710467915.7A Pending CN107162020A (en) | 2017-06-20 | 2017-06-20 | A kind of production method of food-grade potassium chloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108323745A (en) * | 2018-03-20 | 2018-07-27 | 天津长芦汉沽盐场有限责任公司 | A kind of refined crushing washing salt production method of the reparing process containing crystal form |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105460960A (en) * | 2015-11-20 | 2016-04-06 | 天津长芦汉沽盐场有限责任公司 | Method for producing large-granular food-grade potassium chloride by two-stage continuous crystallization |
-
2017
- 2017-06-20 CN CN201710467915.7A patent/CN107162020A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105460960A (en) * | 2015-11-20 | 2016-04-06 | 天津长芦汉沽盐场有限责任公司 | Method for producing large-granular food-grade potassium chloride by two-stage continuous crystallization |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108323745A (en) * | 2018-03-20 | 2018-07-27 | 天津长芦汉沽盐场有限责任公司 | A kind of refined crushing washing salt production method of the reparing process containing crystal form |
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Application publication date: 20170915 |
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