CN204265535U - A kind of calcium sulfate seeded crystallization device - Google Patents
A kind of calcium sulfate seeded crystallization device Download PDFInfo
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- CN204265535U CN204265535U CN201420759886.3U CN201420759886U CN204265535U CN 204265535 U CN204265535 U CN 204265535U CN 201420759886 U CN201420759886 U CN 201420759886U CN 204265535 U CN204265535 U CN 204265535U
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Abstract
The utility model relates to a kind of crystallization apparatus, particularly a kind of calcium sulfate seeded crystallization device.This crystallization apparatus includes crystallizer, crystalline growth pipe, crystal collects tower, clear liquid vent pipe, crystalliser feet is connected with crystalline growth pipe, crystalline growth pipe and crystal are collected tower and are connected, crystal is collected tower and is connected with clear liquid vent pipe, described crystallizer comprises the import of supersaturation calcium sulphate soln, calcium sulfate crystal seed adds entrance, stirring rake, described crystal is collected in tower and swash plate is housed, and this crystallization apparatus is directly connected with electrodialysis concentration systems, a set of reasonable in design is provided, what technique effect was high can separate out and the calcium sulphate crystal crystallization apparatus collected online.
Description
Technical field
The utility model belongs to water-treatment technology field, is specifically related to a kind of calcium sulfate seeded crystallization device.
Background technology
Now to be situated between steady ability because calcium sulfate has retrograde solubility characteristic and larger supersaturation more than 50 DEG C, therefore concentrate in reverse osmosis concentration, electrodialysis, in the production process such as salt manufacturing along with the concentration of feed liquid constantly raises, in feed liquid, calcium sulfate is often in higher hypersaturated state, especially in the region that local temperature is higher, result causes calcium sulfate to be separated out, and becomes the calcium sulfate scale being difficult to remove.
Prevent the research of heating tube wall knot calcium sulfate scale from once doing a large amount of work for gypsum seed method abroad.The U.S. and Japanese salt industry research department, in the heating evaporation process of different condition, all done a series of research to the precipitation of gypsum, attachment and supersaturation, and made gypsum seed method successfully be applied in salt industry.
The principle of gypsum seed method antiscale is: utilize plane of crystal that crystal seed structure is identical with dirty thing to the avidity of dirty thing, reduce calcium sulfate degree of supersaturation in feed liquid, the calcium sulfate molecule of separating out in salts solution is preferentially attached on the calcium sulphate crystal of suspension, and is not deposited on tube wall.
The utility model is based on above principle, design a kind of can precipitation online and the calcium sulfate seeded crystallization device collected, and then solve concentrate in reverse osmosis concentration, electrodialysis, in the production process such as salt manufacturing due to feed liquid in calcium sulfate be often in higher hypersaturated state and separate out, thus form the problem being difficult to the calcium sulfate scale removed.
Utility model content
Technical problem to be solved in the utility model is to provide a set of reasonable in design, high can the separating out online and the calcium sulphate crystal crystallization apparatus collected of technique effect.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of calcium sulfate seeded crystallization device, this device comprises: crystallizer, crystalline growth pipe, crystal collects tower, clear liquid vent pipe, and crystalliser feet is connected with crystalline growth pipe, crystalline growth pipe and crystal are collected tower and are connected, crystal is collected tower and is connected with clear liquid vent pipe, and described crystallizer comprises the import of supersaturation calcium sulphate soln, and calcium sulfate crystal seed adds entrance, stirring rake, described crystal is collected in tower and swash plate is housed.
Preferably, on the basis of calcium sulfate seeded crystallization device recited above, also comprise calcium sulfate concentration systems, described supersaturation calcium sulphate soln import is connected with calcium sulfate concentration systems, and described clear liquid vent pipe and calcium sulfate concentration systems are connected to form a complete loop.
The utility model compared with the existing technology has the following advantages and effect: the crystallization apparatus structure 1, adopted is simple, and technique effect is good.2, separate out and the calcium sulfate seeded crystallization device collected online, and then solve concentrate in reverse osmosis concentration, electrodialysis, in the production process such as salt manufacturing due to feed liquid in calcium sulfate be often in higher hypersaturated state and separate out, thus form the problem being difficult to the calcium sulfate scale removed.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is device schematic diagram of the present utility model.
Label declaration: 1, original water inlet; 2, calcium sulfate concentration systems; 3, dense water storing unit; 4, calcium sulphate soln import; 5, crystallizer; 6, stirring rake; 7, calcium sulfate crystal seed adds entrance; 8, crystalline growth pipe; 9, crystal collects tower; 91, swash plate; 10, clear liquid drainage; 11, fresh water relief outlet.
Embodiment
Be described in further detail the utility model below in conjunction with embodiment, following examples are that the utility model is not limited to following examples to explanation of the present utility model.
Embodiment 1: the calcium sulphate content of a certain means of flue gas desulfurization of power plant waste water is 2000mg/L, need make zero discharge treatment.First with electrodialysis it is concentrated, its calcium sulfate is concentrated after concentrated three times reaches 6000mg/L, calcium sulfate concentration reaches hypersaturated state, supersaturation calcium sulphate soln enters crystallizer 5, add in entrance 7 at the calcium sulfate crystal seed of device simultaneously and add the calcium sulfate crystal seed that diameter is 20 microns, add-on is 0.2g crystal seed/L supersaturated solution.Carry out stirring at low speed after adding crystal seed, mixing speed is 10 turns/min, and crystal seed is fully contacted with solution.Then make the solid-liquid of crystal seed and supersaturated solution mix body and enter crystalline growth pipe 8, the residence time is 10min.Now crystal seed grows up into macrocrystal, enters calcium sulphate crystal and collects tower 9.Collect in tower 9 and swash plate 91 sediment structure is housed, collect discharge through collecting tower 9 after calcium sulphate crystal precipitation, supernatant liquor is discharged from clear liquid drainage 10, and the electrodialysis system getting back to calcium sulfate concentration systems 2 continues concentrated.Steady running 5000h, electrodialysis system and crystal of calcium sulfate device all do not have scale formation, and the calcium sulphate crystal diameter collected is 1-5mm, and calcium sulphate content reaches more than 99%, are purer calcium sulphate crystal.
Embodiment 2: the calcium sulphate content of the dense water of RO of a certain Coal Chemical Industry Treated sewage reusing is 150mg/L, need make zero discharge treatment.First with electrodialysis it is concentrated, its calcium sulfate is concentrated after concentrated 50 times reaches 7500mg/L, calcium sulfate concentration reaches hypersaturated state, supersaturation calcium sulphate soln enters crystallizer 5, add in entrance 7 at the calcium sulfate crystal seed of device simultaneously and add the calcium sulfate crystal seed that diameter is 15 microns, add-on is 0.25g crystal seed/L supersaturated solution.Carry out stirring at low speed after adding crystal seed, mixing speed is 12 turns/min, and crystal seed is fully contacted with solution.Then make the solid-liquid of crystal seed and supersaturated solution mix body and enter crystalline growth pipe 8, the residence time is 15min.Now crystal seed grows up into macrocrystal, enters calcium sulphate crystal and collects tower 9.Collect in tower and sloping plate deposition structure is housed, collect discharge through collecting tower after calcium sulphate crystal precipitation, supernatant liquor is discharged from clear liquid drainage, and the electrodialysis system getting back to calcium sulfate concentration systems 5 continues concentrated.Steady running 3000h, electrodialysis system and crystal of calcium sulfate device all do not have scale formation, and the calcium sulphate crystal diameter collected is 1-3mm, and calcium sulphate content reaches more than 98.5%, are purer calcium sulphate crystal.
In addition, it should be noted that, the specific embodiment described in this specification sheets, the shape, institute's title of being named etc. of its parts and components can be different.All equivalences of doing according to structure, feature and the principle described in the utility model inventional idea or simple change, be included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (2)
1. a calcium sulfate seeded crystallization device, it is characterized in that this device comprises: crystallizer (5), crystalline growth pipe (8), crystal collects tower (9), clear liquid vent pipe (10), crystallizer (5) bottom is connected with crystalline growth pipe (8), crystalline growth pipe (8) and crystal are collected tower (9) and are connected, crystal is collected tower (9) and is connected with clear liquid vent pipe (10), described crystallizer (5) comprises supersaturation calcium sulphate soln import (4), calcium sulfate crystal seed adds entrance (7), stirring rake (6), described crystal is collected in tower (9) and swash plate (91) is housed.
2. calcium sulfate seeded crystallization device according to claim 1, characterized by further comprising calcium sulfate concentration systems (2), described supersaturation calcium sulphate soln import (4) is connected with calcium sulfate concentration systems (2), and described clear liquid vent pipe (10) and calcium sulfate concentration systems (2) are connected to form a complete loop.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420759886.3U CN204265535U (en) | 2014-12-05 | 2014-12-05 | A kind of calcium sulfate seeded crystallization device |
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| CN201420759886.3U CN204265535U (en) | 2014-12-05 | 2014-12-05 | A kind of calcium sulfate seeded crystallization device |
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| CN204265535U true CN204265535U (en) | 2015-04-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402124A (en) * | 2014-12-05 | 2015-03-11 | 杭州水处理技术研究开发中心有限公司 | Calcium sulfate seed crystal crystallization device and calcium sulfate seed crystal crystallization method |
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2014
- 2014-12-05 CN CN201420759886.3U patent/CN204265535U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402124A (en) * | 2014-12-05 | 2015-03-11 | 杭州水处理技术研究开发中心有限公司 | Calcium sulfate seed crystal crystallization device and calcium sulfate seed crystal crystallization method |
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