CN201276426Y - Sodium sulphate decahydrate crystallizer - Google Patents
Sodium sulphate decahydrate crystallizer Download PDFInfo
- Publication number
- CN201276426Y CN201276426Y CNU2008201607736U CN200820160773U CN201276426Y CN 201276426 Y CN201276426 Y CN 201276426Y CN U2008201607736 U CNU2008201607736 U CN U2008201607736U CN 200820160773 U CN200820160773 U CN 200820160773U CN 201276426 Y CN201276426 Y CN 201276426Y
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- China
- Prior art keywords
- cylindrical shell
- crystallizer
- shell
- barrel body
- guide shell
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Abstract
The utility model discloses a sodium sulfate crystallizer, comprising a barrel body, a feed outlet pipe which is arranged at the lower part of the side wall of the barrel body, a speed-regulating motor and a speed reducer which are arranged at the top part of the barrel body, and a transmission shaft of a stirrer, which is vertically arranged in the inner part of the barrel body; one end of the transmission shaft of the stirrer is connected with the speed reducer, and the other end thereof is provided with a stirrer blade; a cylindrical guide barrel is arranged at the inner part of the barrel body, and the upper opening of the guide barrel is arranged below a liquid flow surface, and a clearance is left between the lower opening and the bottom part of the barrel body, and the inner diameter of the guide barrel is less than then of the barrel body, and the stirrer blade is arranged in the inner part of the guide barrel; the bottom edge of the barrel body is an inverted conical shape, and a forward conical protrusion is arranged at the center of the bottom part; 3-5 vertical baffles are uniformly distributed on the inner wall of the barrel body, and the height of the baffle is higher than that of the guide barrel. The sodium sulfate crystallizer adopts a special structural design, thus leading the average grain diameter of the sodium sulfate crystallizer to reach more than 0.25; in addition, the operation period is long, the energy consumption is low, the cost is low, thus being convenient for operation.
Description
Technical field
The utility model belongs to the crystallization technique field, relates to a kind of crystallizer, relates in particular to a kind of sal glauberi crystallizer that is used for the denitration of brine freezing method.
Background technology
On China Sichuan, Hubei, Jiangxi, Jiangsu and other places large-scale halite bed is arranged all, for locality development salt chemical engineering provides the resource assurance.The normal association saltcake of rock salt, the existence of saltcake has not only restricted the use of salt, and handles and badly also can cause environmental pollution.The present cold method denitrating technique that adopts, principle are to utilize the difference of sodium-chlor and the sodium sulfate component of common saturated solution under different temperature, by NaCl-Na
2SO
4-H
2O ternary system phasor as can be known, Na when temperature is lower than 17.9 ℃
2SO
4The reduction of solubility with temperature significantly reduce, reach best efficiency point, the overwhelming majority's Na during to-5 ℃ when temperature is low
2SO
4With Na
2SO
410H
2The form crystallization of O and going out reaches isolating purpose.When existing technology was carried out the sal prunella separation, sodium sulfate in the brine content had influenced the quality of bittern generally all greater than 7.5g/L.The major cause that causes this phenomenon is not have specially designed sal glauberi crystallizer in the existing technology, only by one merely hit a circulation groove and freezing interchanger with material bittern circulating frozen to-5 ℃, when the material cooling makes sodium sulfate reach supersaturation in solution, the sal glauberi granule crystal that crystallization is separated out is tiny, and the sodium sulfate degree of supersaturation that enters in the isolating material of back road settling vessel is still higher, material is still separated out sal glauberi nucleus and thin brilliant in settling vessel, the crystal formation a large amount of floating nitre of tiny sal glauberi, cause sal glauberi crystal and bittern separation difficulty, the separating device volume is big.Owing to separation is not thorough, still contain in the bittern after the separation to be entrained with more tiny sal glauberi crystal, cause sodium sulfate in the brine content greater than 7.5g/L, influence the quality of bittern, and then influenced the use of bittern in salt chemical engineering and two alkali industry.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of sal glauberi crystallizer that is used for the brine freezing denitration.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is:
A kind of sal glauberi crystallizer, comprise cylindrical shell, place the cylinder lateral wall bottom the material outlet pipe, be installed in the buncher and step-down gear, the vertical agitator transmission shaft that places inner barrel at cylindrical shell top, agitator transmission shaft one end links to each other with step-down gear, and the other end is equipped with propeller-blade; Inner barrel is equipped with a columnar guide shell that only has sidewall, no loam cake and go to the bottom, this guide shell is suitable for reading to be located at below the liquid stream interface, the gap is left in guide shell end opening and cylindrical shell bottom, and the guide shell internal diameter is less than cylinder internal diameter, and propeller-blade places guide shell inside; The cylindrical shell bottom margin is a back taper, and there is a positive tapered protrusion in bottom centre, and positive taper convex top is relative with the guide shell center; 3～5 vertical baffle plates of cylinder inboard wall uniform distribution, the height of baffle plate is higher than the height of guide shell.
Wherein, cylinder lateral wall top is part 3～5 freezing return lines of cloth evenly, and the cylindrical shell outside is around there being a circle to gather pipe, and circle gathers the outer freezing heat-exchanger rig of pipe and crystallizer and links to each other, and all outlets of freezing return line gather pipe by pipeline and circle and are connected.
Wherein, the cylindrical shell bottom is provided with crystallizer and drains pipe.
Wherein, guide shell is fixed on inner barrel by upper support and lower support.Described upper support is 3 equally distributed bar-like member, and this bar-like member one end links to each other with cylinder lateral wall, and the other end links to each other with the guide shell side wall upper part.Described lower support is 3 equally distributed bar-like member, and this bar-like member one end links to each other with the cylindrical shell bottom, and the other end links to each other with the guide shell lower sidewall.
During use during this crystallizer, the material that needs are handled joins in the utility model crystallizer, when the liquid level of material meets and exceeds freezing bypass outlet pipe, with pump material is delivered to freezing interchanger and carry out circulating frozen, temperature drops to when sodium sulfate solubleness reaches supersaturation in the material, begins to have the sal glauberi crystal to separate out the formation nucleus in the material.Because the effect of stirring, material are in the middle of the utility model crystallizer guide shell and the space internal recycle mixed flow of the guide shell outside and cylindrical shell formation.Sodium sulfate in the material around the nucleus is separated out on nucleus and is formed thin crystalline substance, and it is saturated that degree of supersaturation is tending towards.Because the effect of stirring, thin saturated material around brilliant is constantly replaced by at a distance mixing of materials, makes the material around the thin crystalline substance reach supersaturation again, and new sodium sulfate is being separated out on thin crystalline substance, the carrying out continuously of this process, and crystal is constantly grown up.Because the effect of stirring, material circulates inside and outside guide shell, the baffle plate of bipyramid structure and barrel can make material form the stable circulation flow state, crystal in the material is suspended in the material thus, by regulating the agitator speed of rotation, the intensity of circulation of control material, when crystal grain reaches one regularly, because weight increases, the circulation of material can not suspend the macrobead crystal again, all macrobead crystal will more concentrate on the bottom of circulation crystallizer, send separate and subside to handle so circulation crystallizer bottom is met the requirements of the material extraction.Sal glauberi crystal median size reaches more than the 0.25mm in these materials, sal glauberi crystallization degree of supersaturation in the basically eliminate mother liquor, in settling vessel, no longer produce thin brilliant particle, the sedimentation of sal glauberi crystal grain is thorough, and sodium sulphate content is smaller or equal to 7.5g/L in the clear liquid of separation back overflow.
Beneficial effect: sal glauberi crystallizer of the present utility model adopts special structure design, and sal glauberi crystalline median size is reached more than the 0.25mm.The crystallization that can be applicable to sodium sulfate in the brine freezing method denitrating technique is removed, replace the middle circulation groove in the conventional process, fully guarantee separating of sodium-chlor and sodium sulfate in the bittern, satisfy the specification of quality of basic industry, make the rock salt resource of sal prunella association obtain comprehensive utilization with lower energy expenditure to sodium chloride brine.The utility model crystallizer is long running period, and energy consumption is low, and cost is low, is convenient to operation, belongs to a kind of green device of three-waste free pollution, is particularly suitable for utilizing the rock salt resource to produce caustic soda, realizes with stew in soy sauce alkali.
Description of drawings
Fig. 1 is the front view of the utility model sal glauberi crystallizer.
Fig. 2 is the vertical view of the utility model sal glauberi crystallizer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details.
Fig. 1 is the front view of the utility model sal glauberi crystallizer, and Fig. 2 is its vertical view.
As seen from the figure, sal glauberi crystallizer of the present utility model, comprise cylindrical shell 4, place cylindrical shell 4 lower sidewall material outlet pipe 16, be installed in the buncher 10 and step-down gear 9, the vertical agitator transmission shaft 12 that places cylindrical shell 4 inside at cylindrical shell 4 tops, agitator transmission shaft 12 1 ends link to each other with step-down gear 9, the other end is equipped with propeller-blade 15, and the agitator part is fixed on (comprising buncher 10, step-down gear 9, agitator transmission shaft 12 and propeller-blade 15) top of cylindrical shell 4 by top-support 7.
4 vertical baffle plates 3 of cylindrical shell 4 inwall uniform distribution, the height of baffle plate 3 is higher than the height of guide shell 14.
The crystallization that the utility model is applied to sodium sulfate in the brine freezing method denitrating technique is removed, and specific operation process is as follows: brine temperature is 25 ℃, and flow is 20m
3/ h, sodium chloride-containing is 280～290g/L in the bittern, sodium sulfate is 20～35g/L, and bittern is 10 ℃ and enters crystallizer that bittern is freezing at crystallizer and freezing interchanger internal recycle after precooling, Tc is-5 ℃, salt slurry after the crystallization send settling vessel to carry out gravity settling, and the clear liquid sodium chloride-containing of sedimentation overflow is 280～290g/L, and sodium sulfate is 6.7g/L, clear liquid bittern uses for later process, Na
2SO
410H
2O crystal size 0.25mm.
Claims (6)
1, a kind of sal glauberi crystallizer, comprise cylindrical shell (4), place the material outlet pipe (16) of cylindrical shell (4) lower sidewall, be installed in the buncher (10) and the step-down gear (9) at cylindrical shell (4) top, vertically place the inner agitator transmission shaft (12) of cylindrical shell (4), agitator transmission shaft (12) one ends link to each other with step-down gear (9), the other end is equipped with propeller-blade (15), it is characterized in that cylindrical shell (4) inside is equipped with one and only has sidewall, no loam cake and the columnar guide shell (14) of going to the bottom, this guide shell (14) is suitable for reading to be located at below the liquid stream interface, the gap is left in guide shell (14) end opening and cylindrical shell (4) bottom, guide shell (14) internal diameter is less than cylindrical shell (4) internal diameter, and propeller-blade (15) places guide shell (14) inside; Cylindrical shell (4) bottom margin is a back taper, and there is a positive tapered protrusion (1) in bottom centre, and positive tapered protrusion (1) top is relative with guide shell (14) center; Cylindrical shell (4) 3～5 vertical baffle plates of inwall uniform distribution (3), the height of baffle plate (3) is higher than the height of guide shell (14).
2, sal glauberi crystallizer according to claim 1, it is characterized in that evenly part 3～5 freezing return lines of cloth (6) of cylindrical shell (4) side wall upper part, cylindrical shell (4) outside is around there being a circle to gather pipe (5), circle gathers the outer freezing heat-exchanger rig of pipe (5) and crystallizer and links to each other, and all outlets of freezing return line (6) gather pipe (5) by pipeline and circle and are connected.
3, sal glauberi crystallizer according to claim 1 is characterized in that cylindrical shell (4) bottom is provided with crystallizer and drains pipe (18).
4, sal glauberi crystallizer according to claim 1 is characterized in that guide shell (14) is fixed on cylindrical shell (4) inside by upper support (13) and lower support (2).
5, sal glauberi crystallizer according to claim 4 is characterized in that described upper support (13) is 3 equally distributed bar-like member, and this bar-like member one end links to each other with cylindrical shell (4) sidewall, and the other end links to each other with guide shell (14) side wall upper part.
6, sal glauberi crystallizer according to claim 4 is characterized in that described lower support (2) is 3 equally distributed bar-like member, and this bar-like member one end links to each other with cylindrical shell (4) bottom, and the other end links to each other with guide shell (14) lower sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201607736U CN201276426Y (en) | 2008-10-20 | 2008-10-20 | Sodium sulphate decahydrate crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201607736U CN201276426Y (en) | 2008-10-20 | 2008-10-20 | Sodium sulphate decahydrate crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201276426Y true CN201276426Y (en) | 2009-07-22 |
Family
ID=40894007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201607736U Expired - Lifetime CN201276426Y (en) | 2008-10-20 | 2008-10-20 | Sodium sulphate decahydrate crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201276426Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073030A (en) * | 2013-02-01 | 2013-05-01 | 青海盐湖工业股份有限公司 | Crystallizer for hydrolyzing carnallite |
| CN104724730A (en) * | 2015-04-02 | 2015-06-24 | 湘潭大学 | Method and device for crystallizing lead plaster desulphurization by-product sodium sulfate based on localized cooling and rapid crystal precipitation |
-
2008
- 2008-10-20 CN CNU2008201607736U patent/CN201276426Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073030A (en) * | 2013-02-01 | 2013-05-01 | 青海盐湖工业股份有限公司 | Crystallizer for hydrolyzing carnallite |
| CN103073030B (en) * | 2013-02-01 | 2014-05-07 | 青海盐湖工业股份有限公司 | Crystallizer for hydrolyzing carnallite |
| CN104724730A (en) * | 2015-04-02 | 2015-06-24 | 湘潭大学 | Method and device for crystallizing lead plaster desulphurization by-product sodium sulfate based on localized cooling and rapid crystal precipitation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090722 |
|
| CX01 | Expiry of patent term |