CN103893990B - Inorganic salts crystallization Large stone salt technique and equipment thereof - Google Patents
Inorganic salts crystallization Large stone salt technique and equipment thereof Download PDFInfo
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- CN103893990B CN103893990B CN201410138538.9A CN201410138538A CN103893990B CN 103893990 B CN103893990 B CN 103893990B CN 201410138538 A CN201410138538 A CN 201410138538A CN 103893990 B CN103893990 B CN 103893990B
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Abstract
A kind of inorganic salts crystallization Large stone salt technique and equipment thereof, inorganic salt solution enters circulation line by charging aperture, carry through circulating pump, and by oven heats, enter evaporator by upper cycling mouth and carry out evaporative crystallization, separate out salt grain and also obtain the first salt-making mother liquor, what the Inner eycle tank mouth bottom this evaporator entered below educates brilliant tank, within in brilliant tank time of staying 1-6 hour, carry out educating crystalline substance educating, obtain the salt grain of Large stone, the salt grain of small particle diameter and the second salt-making mother liquor; The salt grain of Large stone is exported by the salt of educating brilliant pot bottom discharges, the salt grain of small particle diameter and the second salt-making mother liquor part are discharged by the mother liquor discharging opening of educating brilliant tank, another part enters this circulation line through educating with this lower circulation port that brilliant tank is communicated with, and through the conveying of this circulating pump, this oven heats, enter this evaporator finally by this upper cycling mouth and carry out the crystallization of next round circulating and evaporating, controlling flow velocity in this circulation line is 0.6-2.0m/s, and solid-to-liquid ratio is 10-35%.
Description
Technical field
The invention belongs to chemical process technical field, particularly a kind of is raw materials evaporate crystallization Large stone salt technique and equipment thereof with inorganic salt solution.
Background technology
Current inorganic salts crystallization processes is general with direct circulation evaporimeter or inverse circulating evaporator.When wherein using direct circulation evaporimeter, bittern is entered by import, through the oven heats of circulating pump conveying, steam inlet, bittern enters evaporator evaporative crystallization by upper cycling mouth and separates out salt, salt grain is exported by salt and discharges, and salt-making mother liquor is after lower circulation pipe, and some is discharged by mother liquor discharging opening, another part, through the oven heats of circulating pump conveying, steam inlet, again enters evaporator by upper cycling mouth and carries out circulating and evaporating.But, because residence time of material in tank is shorter in evaporation process, do not educate brilliant tank simultaneously and be unfavorable for that eliminating small grains increases, and produces salt particle diameter less (0.2-0.3mm).And when using inverse circulating evaporator, bittern is entered by import, through the oven heats of circulating pump conveying, steam inlet, bittern enters evaporator evaporative crystallization by upper cycling mouth and separates out salt, salt grain is exported by salt and discharges, and salt-making mother liquor is after lower circulation pipe, and some is discharged by mother liquor discharging opening, another part, through the oven heats of circulating pump conveying, steam inlet, enters evaporator circulating and evaporating by upper cycling mouth).But, due to the small grains short circuit in slurry in tank in evaporation process, do not educate brilliant tank simultaneously and be unfavorable for that eliminating small grains increases, produce salt change of size scope comparatively large (0.1-0.4mm).
Therefore, existing above-mentioned crystallization processes also exists that inorganic salts particle diameter is little and to carry impurity component secretly higher, and then the storage time is short, needs to add chemicals fluffy powder in order to prevent the problem of inorganic salts fouling, urgently to be resolved hurrily.
Summary of the invention
In order to solve the problem, the object of this invention is to provide a kind of inorganic salts crystallization Large stone salt technique, this technique salt-pepper noise particle diameter is large, and without the need to adding chemical fluffy powder thus without chemical contamination, and then be conducive to the safety of salt-pepper noise, extend the storage time.
Another object of the present invention is to provide a kind of equipment of inorganic salts crystallization Large stone salt, uses this equipment that salt-pepper noise particle diameter can be made large, and then is conducive to salt-pepper noise safety, extend the storage time.
For achieving the above object, the present invention takes following technical scheme:
A kind of inorganic salts crystallization Large stone salt technique, comprises the following steps:
A. inorganic salt solution enters circulation line by charging aperture, through circulating pump conveying, and by oven heats, enters evaporator carry out evaporative crystallization by the upper cycling mouth of this circulation line, separate out salt grain and obtain the first salt-making mother liquor;
What B. salt grain and the first salt-making mother liquor entered below through the Inner eycle tank mouth bottom this evaporator educates brilliant tank, within in brilliant tank time of staying 1-6 hour, carry out educating crystalline substance educating, educating the absolute degree of supersaturation of brilliant process control is 1-2g/l, obtains the salt grain of Large stone, the salt grain of small particle diameter and the second salt-making mother liquor;
C. the salt grain of Large stone is exported by the salt of educating brilliant pot bottom and discharges, the salt grain of small particle diameter and the second salt-making mother liquor part are discharged by the mother liquor discharging opening of educating brilliant tank, another part enters this circulation line through educating with this lower circulation port that brilliant tank is communicated with, and through the conveying of this circulating pump, this oven heats, enter this evaporator finally by this upper cycling mouth and carry out the crystallization of next round circulating and evaporating, controlling flow velocity in this circulation line is 0.6-2.0m/s, and solid-to-liquid ratio is 10-35%.
Further, described inorganic salt solution can be sodium chloride solution, metabisulfite solution or sodium nitrate etc.
The equipment used in inorganic salts crystallization Large stone salt technique, comprises evaporator and is located at and educate brilliant tank and circulation line below this evaporator;
Be provided with Inner eycle tank mouth bottom this evaporator, educate brilliant tank with this and be communicated with;
This is educated brilliant pot bottom and is provided with salt outlet, and top is provided with mother liquor discharging opening;
This circulation line is provided with charging aperture, and two ends are respectively equipped with upper cycling mouth and lower circulation port, educate brilliant tank be respectively communicated with this evaporator and this; Be provided with circulating pump in this circulation line, between this circulating pump and this upper cycling mouth, be provided with heating clamber.
The invention has the beneficial effects as follows: use inorganic salts crystallization Large stone salt Processes and apparatus of the present invention, salt-pepper noise particle diameter can be made large, and without the need to adding chemical fluffy powder thus without chemical contamination, and then be conducive to the safety of salt-pepper noise, extend the storage time.
Accompanying drawing explanation
Fig. 1 is inorganic salts crystallization Large stone salt process device structure schematic diagram of the present invention.
Detailed description of the invention
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing and preferred embodiment.
As shown in Figure 1, the invention provides the equipment used in a kind of inorganic salts crystallization Large stone salt technique, comprise evaporator 1 and be located at and educate brilliant tank 2 and circulation line 3 below this evaporator 1.Be provided with Inner eycle tank mouth 4 bottom this evaporator 1, educate brilliant tank 2 with this and be communicated with.This is educated bottom brilliant tank 2 and is provided with salt outlet 5, and top is provided with mother liquor discharging opening 6.This circulation line 3 is provided with charging aperture 7, and two ends are respectively equipped with upper cycling mouth 8 and lower circulation port 9, educates brilliant tank 2 be respectively communicated with this evaporator 1 and this.Be provided with circulating pump 10 in this circulation line 3, between this circulating pump 10 and this upper cycling mouth 8, be provided with heating clamber 11.
The present invention separately provides a kind of concrete technology utilizing the said equipment crystallization Large stone salt, and it comprises the following steps:
A. inorganic salt solution enters circulation line 3 by charging aperture 7, carries through circulating pump 10, and is heated by heating clamber 11, enters evaporator 1 carry out evaporative crystallization by the upper cycling mouth 8 of this circulation line 3, separates out salt grain and obtains the first salt-making mother liquor;
What B. salt grain and the first salt-making mother liquor entered below through the Inner eycle tank mouth 4 bottom this evaporator 1 educates brilliant tank 2, within in brilliant tank 2 time of staying 1-6 hour, carry out educating crystalline substance educating, educating the absolute degree of supersaturation of brilliant process control is 1-2g/l, obtains the salt grain of Large stone, the salt grain of small particle diameter and the second salt-making mother liquor;
C. the salt grain of Large stone exports 5 discharges by the salt of educating bottom brilliant tank 2, the salt grain of small particle diameter and the second salt-making mother liquor part are discharged by the mother liquor discharging opening 6 of educating brilliant tank 2, another part enters this circulation line 3 through educating with this lower circulation port 9 that brilliant tank 2 is communicated with, and carry through this circulating pump 10, this heating clamber 11 heats, enter this evaporator 1 finally by this upper cycling mouth 8 and carry out the crystallization of next round circulating and evaporating, controlling flow velocity in this circulation line 3 is 0.6-2.0m/s, and solid-to-liquid ratio is 10-35%.
The present invention with inorganic salt solution solution for raw material, in evaporative crystallization technique process, brilliant tank evaporative crystallization technique is educated by adopting inverse tape loop, control certain solid-to-liquid ratio (10-35%), the time of staying (1-6 hour), educate brilliant process and eliminate degree of supersaturation (controlling absolute degree of supersaturation 1-2g/l), controlled circulation speed (0.6-2.0m/s), coarsegrain (0.4-2.0mm) inorganic salts crystal can be obtained, this technique can obtain coarsegrain inorganic salts, solve current ubiquitous inorganic salts particle diameter little and carry that impurity component is higher causes the storage time short secretly, need to add chemicals fluffy powder in order to prevent the problem of inorganic salts fouling, have and do not add chemical fluffy powder, without chemical contamination, be conducive to inorganic salts safety, extend the features such as storage time.
Below some specific embodiments are namely lifted to be further described.
Embodiment 1: adopt equipment of the present invention, with bittern (sodium chloride-containing 300g/l) for raw material, carry out heat transfer evaporation, control evaporation feed liquid circulates by the solid-to-liquid ratio of 15%, crystal educate in brilliant tank stop 3 hours, in controlled circulation pipeline, flowing velocity is 1.6m/s, and educating brilliant process elimination degree of supersaturation, controlling absolute degree of supersaturation is 2g/l, obtains 1mm Large stone sodium chloride.
Embodiment 2: adopt equipment of the present invention, with glass gall (contains sodium sulfate 320g/l) for raw material, carry out heat transfer evaporation, control evaporation feed liquid circulates by the solid-to-liquid ratio of 20%, crystal educate in brilliant tank stop 4 hours, in controlled circulation pipeline, flowing velocity is 1.5m/s, and educating brilliant process elimination degree of supersaturation, controlling absolute degree of supersaturation is 1.5g/l, obtains 0.8mm Large stone sodium sulphate.
Embodiment 3: adopt equipment of the present invention, with sodium nitrate brine (containing sodium nitrate 200g/l) for raw material, carry out heat transfer evaporation, control evaporation feed liquid circulates by the solid-to-liquid ratio of 30%, crystal stops 5 hours educating brilliant tank, in controlled circulation pipeline, flowing velocity is 1.4m/s, and educating brilliant process elimination degree of supersaturation, controlling absolute degree of supersaturation is 1g/l, obtains 0.6mm Large stone sodium nitrate.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to structure of the present invention.Every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical scheme of the present invention.
Claims (3)
1. an inorganic salts crystallization Large stone salt technique, is characterized in that: comprise the following steps:
A. inorganic salt solution enters circulation line by charging aperture, through circulating pump conveying, and by oven heats, enters evaporator carry out evaporative crystallization by the upper cycling mouth of this circulation line, separate out salt grain and obtain the first salt-making mother liquor;
What B. salt grain and the first salt-making mother liquor entered below through the Inner eycle tank mouth bottom this evaporator educates brilliant tank, within in brilliant tank time of staying 1-6 hour, carry out educating crystalline substance educating, educating the absolute degree of supersaturation of brilliant process control is 1-2g/l, obtains the salt grain of Large stone, the salt grain of small particle diameter and the second salt-making mother liquor;
C. the salt grain of Large stone is exported by the salt of educating brilliant pot bottom and discharges, the salt grain of small particle diameter and the second salt-making mother liquor part are discharged by the mother liquor discharging opening of educating brilliant tank, another part enters this circulation line through educating with this lower circulation port that brilliant tank is communicated with, and through the conveying of this circulating pump, this oven heats, enter this evaporator finally by this upper cycling mouth and carry out the crystallization of next round circulating and evaporating, controlling flow velocity in this circulation line is 0.6-2.0m/s, and solid-to-liquid ratio is 10-35%.
2. inorganic salts crystallization Large stone salt technique according to claim 1, is characterized in that: described inorganic salt solution is sodium chloride solution, metabisulfite solution or sodium nitrate.
3. the equipment used in inorganic salts crystallization Large stone salt technique as claimed in claim 1 or 2, is characterized in that: comprise evaporator and be located at and educate brilliant tank and circulation line below this evaporator;
Be provided with Inner eycle tank mouth bottom this evaporator, educate brilliant tank with this and be communicated with;
This is educated brilliant pot bottom and is provided with salt outlet, and top is provided with mother liquor discharging opening;
This circulation line is provided with charging aperture, and two ends are respectively equipped with upper cycling mouth and lower circulation port, educate brilliant tank be respectively communicated with this evaporator and this; Be provided with circulating pump in this circulation line, between this circulating pump and this upper cycling mouth, be provided with heating clamber.
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| CN104445477B (en) * | 2014-11-06 | 2017-02-08 | 曾小芳 | Evaporative-crystallization salt making equipment and wastewater treatment system for treating high-salt organic wastewater |
| CN105817050A (en) * | 2016-05-27 | 2016-08-03 | 苏州乔发环保科技股份有限公司 | Spraying type separator |
| CN107149790B (en) * | 2017-05-24 | 2019-10-15 | 中国中轻国际工程有限公司 | The high-efficiency evaporating and crystallizing Processes and apparatus of adjustable crystal particle diameter |
| CN109896536B (en) * | 2017-12-11 | 2021-09-07 | 江苏苏盐井神股份有限公司 | Process for producing quality salt product by powder salt crystal transformation |
| CN108837552B (en) * | 2018-08-24 | 2024-01-16 | 中盐工程技术研究院有限公司 | Device for producing large-particle salt |
| CN109896535A (en) * | 2019-02-21 | 2019-06-18 | 中国中轻国际工程有限公司 | A kind of well mine salt Galuber's salt type brine production natural green edible salt technique |
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| JP4259819B2 (en) * | 2002-07-04 | 2009-04-30 | 三菱化学株式会社 | Crystallization method and crystallizer |
| CN201857276U (en) * | 2010-10-19 | 2011-06-08 | 四川蓝光伟业高新技术有限公司 | Crystallizing device for producing large-particle sodium chloride |
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Application publication date: 20140702 Assignee: Xinjiang Yanhu Salt-producing Co., Ltd. Assignor: Zhongqing International Engineering Co., Ltd., China Contract record no.: 2017650000009 Denomination of invention: Process and equipment for crystallizing inorganic salt into large salt particles Granted publication date: 20151111 License type: Common License Record date: 20170802 |
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