CN104014156A - Sodium chloride evaporation crystallization device - Google Patents
Sodium chloride evaporation crystallization device Download PDFInfo
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- CN104014156A CN104014156A CN201410234006.5A CN201410234006A CN104014156A CN 104014156 A CN104014156 A CN 104014156A CN 201410234006 A CN201410234006 A CN 201410234006A CN 104014156 A CN104014156 A CN 104014156A
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- effect evaporation
- evaporation unit
- sodium chloride
- mother liquor
- surface condenser
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Abstract
The invention discloses a sodium chloride evaporation crystallization device which comprises a first effect evaporation unit, a second effect evaporation unit and a third effect evaporation unit which are connected in sequence, the first effect evaporation unit is connected with a steam input pipe and a feeding groove, a gas phase tube of the third effect evaporation unit is connected to a surface condenser, a crystal slurry pipe of the third effect evaporation unit is connected to a centrifuge, the centrifuge is provided with a solid salt output end and a mother liquor tube, and the mother liquor tube is connected to a mother liquor tank; a throttling gear is arranged on a connecting pipe of a separator and heating column tubes in the first effect evaporation unit, the second effect evaporation unit and the third effect evaporation unit; a vacuum pump is arranged on the surface condenser, and the surface condenser and a cooling tower form a cooling loop; evaporation condensate tubes of the second effect evaporation unit, the third effect evaporation unit and the surface condenser are connected to a condensate collection groove. The sodium chloride evaporation crystallization device has the advantages of high operation concentration and less reflux mother liquor.
Description
Technical field
The present invention relates to a kind of evaporation separation equipment, be specifically related to a kind of sodium chloride evaporated crystallization device.
Background technology
Evaporated crystallization device is widely used in chemical industry, non-ferrous metal industry, pesticide industry, food service industry, pharmaceutical industry, and the waste water treatment of the industry such as the ammonia process of desulfurization, mine smelting, steel mill, oil field, by being environment protection treating, comprehensive utilization to the recovery of crystal in waste water by pure environment protection treating, qualified discharge in-depth.Not only the crystallizations such as the ammonium chloride in waste water, potassium chloride, sodium chloride can be recycled, and the moisture content evaporating can reach the discharge standard that country allows.
Due to the characteristic of sodium chloride material, be mainly that the solubility of sodium chloride is not subject to the impact of temperature and changes its crystalline state.The evaporative crystallization technique of existing sodium chloride is following current evaporation, enters cooling or refrigerating plant, cooling or freezing and crystallizing after the state that reaches capacity.And the mode of crystallisation by cooling there is no much contributions to improving percent crystallization in massecuite, mainly owing to worrying that the heat exchanging pipe of evaporimeter easily causes the phenomenon of fouling or obstruction after concentration raises, so concentration can not reach hypersaturated state, the operation concentration of equipment just cannot improve like this, but also can there is a large amount of backflow mother liquors, improve the consumption of heat energy.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of sodium chloride evaporated crystallization device that concentration is high, backflow mother liquor is few that moves.
Technical scheme: for solving the problems of the technologies described above, a kind of sodium chloride evaporated crystallization device provided by the invention, comprise the first effect evaporation element, the second effect evaporation element and the triple effect evaporation unit that connect successively, described the first effect evaporation element connects steam input pipe and charging spout, the gas phase pipe of described triple effect evaporation unit is connected to surface condenser, the magma pipe of described triple effect evaporation unit is connected to centrifuge, described centrifuge has solid salt output and mother liquor pipe, and described mother liquor pipe is connected to mother liquor tank; On heating tubulation in described the first effect evaporation element, the second effect evaporation element and triple effect evaporation unit and the tube connector of separator, throttling arrangement is installed; On described surface condenser, vavuum pump is installed, described surface condenser and cooling tower form cooling circuit; The evaporation condensate pipe of described second effect evaporation element, triple effect evaporation unit and surface condenser is connected to condensate storage.
As preferably, for to the heat energy that makes full use of material in mother liquor tank to carry out crystallization again, described mother liquor tank is connected to the material input of triple effect evaporation unit by circulating pump.
As preferably, in order to improve the evaporation rate of material, described the first effect evaporation element, the second effect evaporation element and triple effect evaporation unit are forced-circulation evaporation unit.
Described throttling arrangement is preferably throttle or valve.
Beneficial effect: sodium chloride evaporated crystallization device of the present invention adopts following current technique, thermal crystalline, backflow mother liquor is few.And utilize throttling arrangement can effectively reduce the high negative pressure swabbing action of vapour liquid separator to heating tubulation, ensure to be full of material in discharging flow process heating tubulation, avoiding heating tubulation internal cause material dispersion results in blockage, thereby make evaporation and crystallization system under the state of a large amount of crystallize outs of hypersaturated state, also can accomplish continuous operation, heat exchanging pipe non-scaling, do not stop up, also just carry out cooling or freezing and crystallizing without entering cooling or refrigerating plant.In fact sodium chloride solution, can not be by reducing temperature crystallize out to temperature insensitive.Also corresponding minimizing of the heat energy that whole system need to consume again like this, has reached abundant energy-conservation object.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention.
Detailed description of the invention
Embodiment: the structure of sodium chloride evaporated crystallization device provided by the invention as shown in Figure 1, comprise the first effect evaporation element 1, the second effect evaporation element 2 and the triple effect evaporation unit 3 that connect successively, by adopting the mode of multiple-effect device to reach the object of saving steam, and all adopt circulating pump to carry out forced circulation in each effect evaporation element, make material in system, there is processing speed and evaporation rate faster.
Wherein the first effect evaporation element 1 connects steam input pipe, and steam reclaims by condensation after the heater of the first effect evaporation element 1, the second effect evaporation element 2 and triple effect evaporation unit 3 successively, and temperature reduces successively.And the first effect evaporation element 1 is connected with charging spout 5, the sewage of sodium chloride-containing is to imitate evaporation element 1, the second effect evaporation element 2 and triple effect evaporation unit 3 by first successively, and identical with the direction of steam input, temperature also reduces successively, i.e. following current technique.The gas phase pipe of triple effect evaporation unit 3 is connected to surface condenser 4, and vavuum pump 8 is installed on surface condenser 4, reduces the boiling point of the medium that is condensed by the air pressure in reduction surface condenser 4.Surface condenser 4 forms cooling circuit with cooling tower 7, and cooling tower 7 is connected with cooling circulating water system (CWS).And the evaporation condensate Guan Jun of second effect evaporation element 2, triple effect evaporation unit 3 and surface condenser 4 is connected to condensate storage 6, by condensed fluid collection discharge.
On heating tubulation in each effect evaporation element and the tube connector of separator, throttling arrangement is all installed, can select disclosed evaporimeter double-flow discharging position preventing clogging up device in the patent ZL201320500141.0 that obtained the authorization before applicant, by increasing the structure of throttle or valve on the pipeline between heater and vapour liquid separator, effectively to reduce the high negative pressure swabbing action of vapour liquid separator to heating tubulation, ensure to be full of material in discharging flow process heating tubulation, avoid heating tubulation internal cause material dispersion and result in blockage.
After three grades of evaporation and concentration, magma is outputed to centrifuge 9 by triple effect evaporation unit 3, the High Rotation Speed of centrifuge 9 makes solid salt (sodium chloride crystallization) separate with mother liquor, mother liquor after separated enters mother liquor tank 10, then be recycled pump and drive, get back to triple effect evaporation unit 3 and again heat and carry out evaporative crystallization.
Through using checking, sodium chloride evaporated crystallization device of the present invention has just reached hypersaturated state at the ducted material of the second effect evaporation element, in the pipeline of triple effect evaporation unit, in material, there is a certain amount of sodium chloride crystal grain, can be by more than 70% crystal separation in material out through centrifugation, again get back to the mother liquor of system and not only measure less, temperature is also higher.The above-mentioned technological means of visible employing has realized the object of high concentration operation.
Taking above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this invention technological thought, carry out various change and amendment completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to claim scope.
Claims (4)
1. a sodium chloride evaporated crystallization device, comprise the first effect evaporation element, the second effect evaporation element and the triple effect evaporation unit that connect successively, described the first effect evaporation element connects steam input pipe and charging spout, it is characterized in that: the gas phase pipe of described triple effect evaporation unit is connected to surface condenser, the magma pipe of described triple effect evaporation unit is connected to centrifuge, described centrifuge has solid salt output and mother liquor pipe, and described mother liquor pipe is connected to mother liquor tank; On heating tubulation in described the first effect evaporation element, the second effect evaporation element and triple effect evaporation unit and the tube connector of separator, throttling arrangement is installed; On described surface condenser, vavuum pump is installed, described surface condenser and cooling tower form cooling circuit; The evaporation condensate pipe of described second effect evaporation element, triple effect evaporation unit and surface condenser is connected to condensate storage.
2. sodium chloride evaporated crystallization device according to claim 1, is characterized in that: described mother liquor tank is connected to the material input of triple effect evaporation unit by circulating pump.
3. sodium chloride evaporated crystallization device according to claim 1, is characterized in that: described the first effect evaporation element, the second effect evaporation element and triple effect evaporation unit are forced-circulation evaporation unit.
4. sodium chloride evaporated crystallization device according to claim 1, is characterized in that: described throttling arrangement is throttle or valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234006.5A CN104014156A (en) | 2014-05-30 | 2014-05-30 | Sodium chloride evaporation crystallization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234006.5A CN104014156A (en) | 2014-05-30 | 2014-05-30 | Sodium chloride evaporation crystallization device |
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| Publication Number | Publication Date |
|---|---|
| CN104014156A true CN104014156A (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410234006.5A Pending CN104014156A (en) | 2014-05-30 | 2014-05-30 | Sodium chloride evaporation crystallization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104548636A (en) * | 2014-12-26 | 2015-04-29 | 淄博广通化工有限责任公司 | Concentration and evaporation device for zirconium oxychloride production process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3712797A (en) * | 1966-10-17 | 1973-01-23 | Escher Wyss Ltd | Process for evaporating naci brine to separate naci crystals from na2so4 |
| CN202880886U (en) * | 2012-09-08 | 2013-04-17 | 湖北三宁化工股份有限公司 | Device for producing monopotassium phosphate by using double decomposition method |
| CN203200119U (en) * | 2013-03-15 | 2013-09-18 | 中国海洋石油总公司 | Reverse osmosis strong brine evaporating and recycling device |
| CN203425543U (en) * | 2013-08-16 | 2014-02-12 | 江苏嘉泰蒸发结晶设备有限公司 | Anti-blocking device for two-pass discharge position of evaporator |
| CN203954725U (en) * | 2014-05-30 | 2014-11-26 | 江苏嘉泰蒸发结晶设备有限公司 | Sodium chloride evaporated crystallization device |
-
2014
- 2014-05-30 CN CN201410234006.5A patent/CN104014156A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3712797A (en) * | 1966-10-17 | 1973-01-23 | Escher Wyss Ltd | Process for evaporating naci brine to separate naci crystals from na2so4 |
| CN202880886U (en) * | 2012-09-08 | 2013-04-17 | 湖北三宁化工股份有限公司 | Device for producing monopotassium phosphate by using double decomposition method |
| CN203200119U (en) * | 2013-03-15 | 2013-09-18 | 中国海洋石油总公司 | Reverse osmosis strong brine evaporating and recycling device |
| CN203425543U (en) * | 2013-08-16 | 2014-02-12 | 江苏嘉泰蒸发结晶设备有限公司 | Anti-blocking device for two-pass discharge position of evaporator |
| CN203954725U (en) * | 2014-05-30 | 2014-11-26 | 江苏嘉泰蒸发结晶设备有限公司 | Sodium chloride evaporated crystallization device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104548636A (en) * | 2014-12-26 | 2015-04-29 | 淄博广通化工有限责任公司 | Concentration and evaporation device for zirconium oxychloride production process |
| CN104548636B (en) * | 2014-12-26 | 2016-05-18 | 淄博广通化工有限责任公司 | Concentration and evaporation device in zirconium oxychloride production technology |
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Application publication date: 20140903 |