CN209378489U - A kind of vacuum type crystallizer for thermosol cold crystallization technique - Google Patents
A kind of vacuum type crystallizer for thermosol cold crystallization technique Download PDFInfo
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- CN209378489U CN209378489U CN201822205293.3U CN201822205293U CN209378489U CN 209378489 U CN209378489 U CN 209378489U CN 201822205293 U CN201822205293 U CN 201822205293U CN 209378489 U CN209378489 U CN 209378489U
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Abstract
The utility model discloses a kind of vacuum type crystallizers for thermosol cold crystallization technique, it is characterized by comprising material liquid entrances 1, crystallizer 2, magma pump 3, mother liquor outlet 4, cooling water storage tank 5, vacuum pump 6, solvent tank 7, hot steam tank 8 and discharge port 9, magma pump 3 includes level-one magma pump and second level magma pump, moves to two floor platforms of crystallizer 2 by original zero meter of platform respectively, and firsts and seconds magma pump is connect with firsts and seconds magma pipe respectively, the length of pipeline of level-one magma pipe is shortened by 15m into 7m, and elbow quantity is reduced to 7 by 11；The pipeline of second level magma pipe shorten to 6m by 16m, and the quantity of elbow is reduced to 2 by 5, reduces the probability of collision nucleation to greatest extent, solves the case where line clogging, material has been saved, ensure that the stabilization and continuity of production technology, and the granularity of finished product is greatly improved.
Description
Technical field
The utility model relates in general to KCl production technical field, is used for thermosol cold crystallization more particularly, to one kind
The vacuum type crystallizer of technique.
Background technique
Currently, have dissolving crystallized method, floatation and dense-media process by the main method of sylvite preparing potassium chloride, with
Constantly improve for carnallite Potassium process, sylvite and high calcium, low sodium low grade potassium frame development and utilization gradually
Paid attention to, thermosol cold crystallization, which is gradually able to mature and operation, the technique, may make mass fraction containing potassium < 4% and sulfur acid calcium
The low-quality mine of mass fraction > 5% is recycled, and can produce the large-particle potassium chloride of mass fraction containing potassium > 95%
Product.The technique can be such that a large amount of low-quality soluble potassium mines are recycled, and main operational principle is to use chlorination at high temperature
Sodium is saturated mother liquor and leaches sylvite ore, and potassium chloride dissolution enters leaching liquid, and sodium chloride then stays in residue, when potassium chloride is in height
Soaked in warm mother liquor it is molten reach saturation after, leaching liquid is cooled down, due to sodium chloride solubility with temperature variation less and chlorination
Potassium is exactly the opposite, after leaching liquid is cooling, has the vigilant precipitation of a large amount of potassium chloride, the mother liquor being separated by solid-liquid separation is by heating
It returns afterwards and soaks molten process potassium chloride dissolving.
The cold clean process flow that production potassium chloride occurs of thermosol is as shown in Figure 1, firstly, be crushed to 10mm for sylvite ore
It is sent into thermosol kettle behind left and right, and is soaked under steam-heated situation with mother liquor and the solution that fresh water is prepared by a certain percentage
Molten, leaching solubility temperature is about 100 DEG C.When soaking molten, all dissolves and reach based on saturation state, sodium chloride dissolution to control potassium chloride
After saturation, the insoluble impurities such as undissolved sodium chloride and silt are sent from bottom.Soak it is molten after solution through filtering I process be made
Smart potassium solution enter in crystallizer, using vacuum crystallization method make potassium chloride occur in temperature-fall period crystallize and grow up to certain
Granularity, magma is after filtering II process, and filtrated stock a part is returned for configuring lysate, remaining goes to salt pan to shine potassium stone processed
Salt, filter cake is washed, it is dry after obtain qualified Potassium Chloride Product.Vacuum crystallization is with advantage for potassium chloride crystallisation by cooling
's.
Thermosol workshop crystal system be thermosol cold junction crystallization production potassium chloride critical control point, and control difficult point,
In solution temperature-fall period after sylvite hot-melt, solution degree of supersaturation constantly increases, and causes crystallization process and grain size number not
It is easy to control, often occur the case where level-one, secondary crystallizer magma blockage in control process, average per tour will at least block
1-5 times, every processing once needs time-consuming 10 minutes or so, seriously destroys the stability and continuity of production technology.For such
Situation is unanimously considered that magma pipeline is longer, elbow is more, causes the temperature difference of environment and material big, in pipe by investigation
It is crystallized in road serious.In addition pipeline is long, the destruction of the multipair crystal system nucleus of elbow is big, has seriously affected the quality of product, has produced
Amount and product granularity.
Utility model content
For the deficiency in above-mentioned background technique, in order to solve problems in the prior art, the purpose of this utility model is that
The vacuum type crystallizer for being used for thermosol cold crystallization technique is provided.
To achieve the above object, the utility model provides the following technical solutions:
A kind of vacuum type crystallizer for thermosol cold crystallization technique, including material liquid entrance 1, crystallizer 2, magma pump 3,
Mother liquor outlet 4, cooling water storage tank 5, vacuum pump 6, solvent tank 7, hot steam tank 8 and discharge port 9, the material liquid entrance 1
The lower section of the crystallizer 2 is set, and by the material liquid entrance 1, pyrogen feed liquid is continuously added to the crystallizer 2
In, the crystallizer 2 and extraneous insulation and internal maintenance condition of high vacuum degree, 3 setting of magma pump enter with the material liquid
The lower end of the crystallizer 2 of 1 opposite side of mouth, connect with magma pipe, and magma passes through the continuously discharge of magma pump 3；The mother
Liquid outlet 4 is arranged in outside the tube wall of 2 one middle side part of crystallizer, and for mother liquor to be discharged, the hot steam tank 8 is arranged described
2 top of crystallizer, the interior hot steam stored of the hot steam tank 8 is used for so that material liquid forms saturated solution and is sent into after being heated
Crystallizer 2, the hot steam tank 8 are connect with the cooling water storage tank 5 by pipeline, and the cooling water storage tank 5 is high-order mixing
Condenser, the solvent vapo(u)r steamed at the top of the crystallizer 2 by escaping, until condensed in the high position mixing condenser, it is described molten
Agent storage tank 7 is connect by pipeline with the vacuum pump 6, and the discharge port 9 is connect with magma pump 3, and the magma pump 3 includes
Level-one magma pump and second level magma pump are individually positioned in two floor platforms of the crystallizer 2, level-one magma pump and second level magma pump
It is connect respectively with level-one magma pipe and second level magma pipe.
Preferably, the length of pipeline of the level-one magma pipe shorten to 7m.
Preferably, the elbow quantity of the level-one magma pipe is reduced to 7.
Preferably, the length of pipeline of the second level magma pipe shorten to 6m.
Preferably, the quantity of the elbow of the second level magma pipe is reduced to 3.
Preferably, external heater is arranged in the vacuum type crystallizer, the material liquid passes through the external heater
The crystallizer 2 is reinjected after the hot steam preheating of generation.
Preferably, the vacuum pump 6 is stage type steam jet pump, for generating and maintaining the vacuum in crystallizer.
Preferably, steam jet pump is also installed in the front of the high position mixing condenser.
Preferably, also setting up circulation pipe 10 on crystalliser feet pipeline, the circulation pipe 10 is connected with corresponding circulating pump
Solution is set to make forced circulation flowing.
Preferably, the vacuum type crystallizer for thermosol cold crystallization technique operates continuously.
The utility model has the beneficial effects that the firsts and seconds magma of crystallizer pumps corresponding firsts and seconds magma pipe plug
The probability for filling in pipeline is almost zero, well ensures the stabilization and continuity of production technology, and the granularity of potassium chloride finished product
It is greatly improved.
Detailed description of the invention
Attached drawing 1 show the cold clean method production technological process of thermosol-；
Attached drawing 2 show the vacuum type mold structure schematic diagram according to the utility model embodiment.
In figure: 1- material liquid entrance；2- crystallizer；3- magma pump；4- mother liquor outlet；5- cools down water storage tank；6- vacuum pump；
7- solvent tank；8- hot steam tank；The first material mouth of 9-；10- circulation pipe.
Attached drawing 3 show the schematic diagram of another embodiment.
Specific embodiment
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, reference label refers to that this is practical new
Component, technology in type, so as to the advantages of the utility model and feature is realized under appropriate circumstances can be easier to be understood.Under
The description in face is the materialization to the utility model claims, and relevant to claim other is not clearly stated
Specific implementation also belongs to the scope of the claims.
In order to be illustrated to the microprocess of industrial crystallization to the clearer understanding of specific embodiment.It is tied in industry
In crystalline substance, due to the phenomenon that there is a large amount of crystal, being influenced by macroscopical crystal and form nucleus referred to as secondary nucleation, this is also
A kind of mode that nucleus is formed.There are two types of the dominant mechanisms of secondary nucleation, i.e. lateral fluid force nucleation and collision nucleation.Work as satiety
When flowing through the plane of crystal being growing with solution with biggish flow velocity, the energy of the shear stress present in fluid boundary layers will be some
The particle for being attached to plane of crystal, which is swept, to be fallen and forms new nucleus, and lateral fluid force nucleation is become.Collision nucleation is crystal and outer
A large amount of fragments that portion's object generates when colliding, wherein being greater than the new nucleus that becomes of critical dimension, collision nucleation is raw in industry
It is generally existing in production, crystallizer level-one, second level magma pipeline in, pipeline is longer, elbow is more, magma pump effect
Under, make liquid at turbulent motion, liquid material loads crystal and duct wall collides, so that secondary nucleation, seriously affects production work
Skill.
A kind of vacuum type crystallizer for thermosol cold crystallization technique shown in Figure 2, including material liquid entrance 1, crystallization
Device 2, magma pump 3, mother liquor outlet 4, cooling water storage tank 5, vacuum pump 6, solvent tank 7, hot steam tank 8 and discharge port 9, raw material
The lower section of crystallizer 2 is arranged in liquid entrance 1, and by the material liquid entrance 1, pyrogen feed liquid is continuously added to the crystallizer
In 2, crystallizer 2 and extraneous insulation and internal maintenance condition of high vacuum degree, magma refer in particular to crystal and mother liquor in thermosol cold crystallization technique
Outstanding mixed object, magma pump 3 is arranged in the lower end with the crystallizer 2 of 1 opposite side of material liquid entrance, connect with magma pipe, and magma leads to
Cross the continuously discharge of magma pump 3；Mother liquor outlet 4 is arranged in outside the tube wall of 2 one middle side part of crystallizer, for mother liquor to be discharged.
As shown in Fig. 2, the hot steam that the setting of hot steam tank 8 stores in the top of crystallizer 2, hot steam tank 8 be used for so that
Material liquid forms saturated solution and is sent into crystallizer 2 after being heated.In vaporization chamber flash evaporation, the droplet to boil on interface splashes
It is very serious.Still it to cohere and form brilliant dirt on 8 wall of hot steam tank.It needs one week additional at the top of hot steam tank 8
The special washing jet pipe or wash water overflow ring sprayed to wall, is regularly cleaned in process of production with clear water, to avoid evaporation
Device section is gradually reduced and bring production capacity declines, and can be in the effect not interrupting production and being cleaned.
Certainly, it as shown in figure 3, vacuum crystallizer can also be not provided with internal heater or cooler, avoids
Crystallization is precipitated on complicated surface exchanger, it is therefore prevented that phenomena such as reducing exchange capability of heat because of fouling, extend the use of heat exchanger
Period.Evaporation, the cooling of solution carry out on the boiling liquid level of hot steam tank 8, and scale problems are also just not present in this way.Therefore,
The hot steam preheating that the heater that the material solution of vacuum type crystallizer can also lean on outside device generates, is then injected into crystallizer
2.After entering the evaporator inside vacuum crystallizer, flashing effect occurs immediately, moment can take steam away, then just open
Begin to continue temperature-fall period, after reaching stable state, temperature and the saturated vapour pressure of solution balance each other.Therefore vacuum crystallizer
Existing evaporative effect has the effect of refrigeration again, that is, plays the role of removing solvent and cooling solution simultaneously.Solution changes edge
Solution concentration advance with cooling both direction, rapidly close to Metastable zone.
Referring again to FIGS. 2, hot steam tank 8 is connect with cooling water storage tank 5 by pipeline, cooling water storage tank 5 is high-order mixing
Condenser, the solvent vapo(u)r steamed at the top of crystallizer 2 by escaping, until condensing in high-order mixing condenser, solvent tank 7 passes through pipe
Line is connect with vacuum pump 6, and discharge port 9 and magma pump 3 connect, and magma pump 3 includes that level-one magma pump and second level magma pump, respectively by
Originally zero meter of platform moves to 2 two floor platform of crystallizer, level-one magma pump and second level magma pump respectively with level-one magma pipe and second level
The connection of magma pipe, thus the length of pipeline of level-one magma pipe is shortened by original 15m into present 7m, the elbow of level-one magma pipe
Quantity has original 11 to be changed to present 7；The length of pipeline of second level magma pipe is shorten to present 6m by original 16m,
The quantity of the elbow of second level magma pipe is changed to 3 by original 5.On the one hand, to a certain extent, reduce to greatest extent
The probability of collision nucleation, solves the case where line clogging, is technology controlling and process, and the yield and quality of finished product creates good condition.
On the other hand, material is also saved.
Vacuum pump 6 selects stage type steam jet pump in the present embodiment, for generating and maintaining the vacuum in crystallizer.
Steam jet pump is also installed in the front of high-order mixing condenser.Generally, the operation temperature in vacuum crystallizer is all very low, institute
The solvent vapo(u)r of generation cannot be water cooled solidifying within the condenser, can fill a steam jet pump in the front of condenser at this time, will be molten
Agent both vapor compression, to improve its condensation temperature.
In addition, also setting up circulation pipe 10 on crystalliser feet pipeline, circulation pipe 10 makes molten under corresponding circulation pumping action
Liquid makees forced circulation flowing, to promote solution uniformly to mix, maintains advantageous crystallization condition.
Vacuum type crystallizer for thermosol cold crystallization technique operates continuously, i.e., a kind of continuous vacuum as shown in Figure 2
Cooler crystallizer.Vacuum cooling crystallizer is that the saturated solution of heat is added to one and in the crystallizer of extraneous insulation 2, due to crystallization
High vacuum is maintained in device 2, therefore the boiling point of its internal solution being detained is lower than the temperature that solution is added.In this way, when solution enters knot
After brilliant device, equilibrium temperature corresponding with pressure in crystallizer 2 is cooled to through adiabatic flash process of hot potassium.
By it is long-term it is on probation after, the firsts and seconds magma of crystallizer pumps corresponding firsts and seconds magma blockage pipe
The probability in road is almost zero, well ensures the stabilization and continuity of production technology, and the granularity of potassium chloride finished product has
Very big promotion, originally finished product potassium chloride granularity 215um's or more accounts for 38%, after transformation, finished product potassium chloride granularity 425um or more
The yield and quality for accounting for 92%. finished product potassium chloride also step a stage, be transformed before Potassium Chloride Product 93% sample account for
70% or so, after transformation, 95% Potassium Chloride Product accounts for 98%.
The utility model is limited it should be noted that above-described embodiment illustrates rather than the utility model
System, and those skilled in the art can be designed alternative embodiment without departing from the scope of the appended claims.?
In claim, any reference symbol between parentheses should not be configured to limitations on claims.
Claims (10)
1. a kind of vacuum type crystallizer for thermosol cold crystallization technique, it is characterised in that: including material liquid entrance (1), crystallization
Device (2), magma pump (3), and mother liquor outlet (4) is cooling water storage tank (5), vacuum pump (6), solvent tank (7), hot steam tank (8) with
And discharge port (9), the material liquid entrance (1) setting is in the lower section of the crystallizer (2), by the material liquid entrance (1),
Pyrogen feed liquid is continuously added in the crystallizer (2), and the crystallizer (2) and extraneous insulation and inside maintain high vacuum
Degree, the magma pump (3) are arranged in the lower end of the crystallizer (2) with material liquid entrance (1) opposite side, with magma pipe
Connection, magma are continuously discharged by magma pump (3)；The mother liquor outlet (4) is arranged in (2) one middle side part of crystallizer
Tube wall outside, for being discharged mother liquor, hot steam tank (8) setting is at the top of the crystallizer (2), the hot steam tank (8)
The hot steam of interior storage is used for so that material liquid forms saturated solution and is sent into crystallizer (2), the hot steam tank (8) after being heated
It is connect with the cooling water storage tank (5) by pipeline, the cooling water storage tank (5) is high-order mixing condenser, the solvent steamed
Steam at the top of the crystallizer (2) by escaping, until condensing in the high position mixing condenser, the solvent tank (7) passes through pipe
Line is connect with the vacuum pump (6), and the discharge port (9) connect with magma pump (3), and the magma pump (3) includes level-one
Magma pump and second level magma pump are individually positioned in two floor platforms of the crystallizer (2), the level-one magma pump and second level magma
Pump is connect with level-one magma pipe and second level magma pipe respectively.
2. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: described
The length of pipeline of level-one magma pipe shorten to 7m.
3. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: described
The elbow quantity of level-one magma pipe is reduced to 7.
4. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: described
The length of pipeline of second level magma pipe shorten to 6m.
5. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: described
The quantity of the elbow of second level magma pipe is reduced to 3.
6. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: described
External heater is arranged in vacuum type crystallizer, after the hot steam preheating that the material liquid passes through external heater generation again
Inject the crystallizer (2).
7. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: described
Vacuum pump (6) is stage type steam jet pump, for generating and maintaining the vacuum in crystallizer.
8. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: described
Also install steam jet pump in the front of high-order mixing condenser.
9. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: crystallization
It is also set up on device bottom conduit circulation pipe (10), the circulation pipe (10) makes solution make forced circulation with the connection of corresponding circulating pump
Flowing.
10. a kind of vacuum type crystallizer for thermosol cold crystallization technique according to claim 1, it is characterised in that: institute
State the vacuum type crystallizer continuous operation for thermosol cold crystallization technique.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860105A (en) * | 2019-12-17 | 2020-03-06 | 尹博闻 | Equipment and method for producing inorganic salt with solubility changing along with temperature by using cooling crystallization |
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- 2018-12-26 CN CN201822205293.3U patent/CN209378489U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860105A (en) * | 2019-12-17 | 2020-03-06 | 尹博闻 | Equipment and method for producing inorganic salt with solubility changing along with temperature by using cooling crystallization |
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