CN101125673A - Method for directly producing calcium chloride from ammonia-soda process waste liquid - Google Patents
Method for directly producing calcium chloride from ammonia-soda process waste liquid Download PDFInfo
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- CN101125673A CN101125673A CNA2007101393046A CN200710139304A CN101125673A CN 101125673 A CN101125673 A CN 101125673A CN A2007101393046 A CNA2007101393046 A CN A2007101393046A CN 200710139304 A CN200710139304 A CN 200710139304A CN 101125673 A CN101125673 A CN 101125673A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to a direct method to produce calcium chloride with ammonia-soda process waste liquid. The method is that: after being open evaporated, the ammonia-soda process waste liquid is preheated to 70 DEG C by a two-effect preheater and sent to the two-effect heater to transfer heat with secondary steam from a one-effect separator, the calcium liquid is separated by the two-effect separator, the secondary steam enters a three-effect heater, the densified calcium liquid enters the three-effect heater to be continued to be evaporated and concentrated; vapor and liquid of the calcium liquid are separated in the three-effect separator to generate more concentrated calcium liquid, the secondary steam is pumped out by a vacuum system and more concentrated calcium liquid is sent to a centrifuge to be separated salt by a three-effect discharging pump; the calcium liquid with salt separated enters a one-effect heater by a one-effect liquid supply pump and transfers primary steam with external supply, vapor and liquid separation is practiced by the one-effect separator to lead the calcium liquid to be concentrated into finishes and secondary steam enters the two-effect heater as heat source. The invention adopts three-effect crossflow evaporation, makes full use of secondary steam, reduces steam application and cost and has obvious energy saving effect and no waste water discharge.
Description
Technical field:
The present invention relates to the production method of calcium chloride, particularly a kind of method by ammonia-soda process waste liquid direct production calcium chloride.
Background technology:
At present, utilize ammonia-soda process waste liquid to produce the method for calcium chloride both at home and abroad mainly based on single-action or double-effect evaporation.In vaporizer, make calcium liquid evaporation concentration lose moisture content, need to use and give birth to steam, and single-action or double-effect evaporation steam consumption are big as the heating thermal source, product comprehensive energy consumption height, rate of profit is lower.
Summary of the invention:
Purpose of the present invention just is to overcome the weak point in original technology, and a kind of method that adopts triple effect cross-flow evaporation, Remarkable Energy Saving by ammonia-soda process waste liquid direct production calcium chloride is provided.
The object of the present invention is achieved like this: a kind of method by ammonia-soda process waste liquid direct production calcium chloride the steps include:
(1) will contain CaCl
2Ammonia-soda process waste liquid about 10% shines in the pond on beaches at different levels and utilizes solar energy to evaporate in the open, ultimate density reaches about 15% and delivers to two effect preheaters, imitate liquid-feeding pumps by two after preheating reaches about 70 ℃ and send into the 2 two effect well heaters of imitating in the vapo(u)rization systems, in this and the secondary steam heat exchange of imitating separator from one in the effect vapo(u)rization system, the calcium liquid that heats enters two and imitates separator, and by two effect recycle pumps circulating and evaporating between two effect well heaters and two effect separators, separate, secondary steam enters triple effect well heater in the triple effect evaporation system as its thermal source by the separator upper pipe, and the calcium liquid of certified concentration enters the triple effect evaporation system and continues evaporation and concentrating;
(2) calcium liquid by the triple effect recycle pump in circulating and evaporating between triple effect well heater and the triple effect separator, separate, produce the calcium liquid of greater concn, secondary steam is taken away by vacuum system, the calcium liquid of greater concn is delivered to the whizzer separated salt through the triple effect discharging pump;
(3) the calcium liquid after the separated salt is imitated liquid-feeding pump by one and is entered an effect well heater, one imitate in the well heater with outside the living steam heat-exchanging of 1.6MPa of confession, and imitate recycle pump by one and imitate well heater and one and imitate circulating and evaporating between the separator, separate, make calcium liquid be condensed into finished product.
Compared to existing technology, the present invention has abandoned the technology of traditional employing single-action or double-effect evaporation production calcium chloride, adopt triple effect cross-flow evaporation, the secondary steam that produces because of the moisture content vaporization in the calcium liquid evaporative process is fully recycled, thereby greatly reduced the consumption of living steam, energy-saving effect is remarkable.Steam consumption only is equivalent to 1/3rd of single-effect evaporation, and production cost is reduced significantly, and the steam condensate that produces in the production process all obtains effective recycling, and non-wastewater discharge has high economic benefit and good social benefit.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Embodiment:
Below in conjunction with drawings and Examples in detail the present invention is described in detail:
(1) will contain CaCl
2Ammonia-soda process waste liquid about 10%, shining lining, pond (elementary, intermediate, senior) on beaches at different levels utilizes solar energy to evaporate in the open, ultimate density reaches about 15%, imitate preheater by pump delivery to two again, preheating reaches about 70 ℃ sends into the 2 two effect well heaters of imitating in the vapo(u)rization system after clear liquid groove precipitation is imitated liquid-feeding pump by two again, imitate the secondary steam heat exchange that one in the vapo(u)rization system imitated separator at this by the heating tube wall and from one, the secondary steam that the water evaporates vaporization produces in the calcium liquid need constantly be separated, and could guarantee carrying out smoothly of evaporative process.The sepn process of calcium liquid and secondary steam is imitated in the separator two and is carried out, and imitate recycle pumps by two and imitate well heaters and two two and imitate circulating and evaporating between the separators, separate, secondary steam enters triple effect well heater in the triple effect evaporation system as its thermal source by the separator upper pipe, and the calcium liquid of enrichment (contains CaCl
219.6%, about 115 ℃ of temperature) enter the triple effect evaporation system and continue evaporation and concentrating.
(2) calcium liquid carries out vapor-liquid separation in the triple effect separator, and by the triple effect recycle pump in circulating and evaporating between triple effect well heater and the triple effect separator, separate, the calcium liquid that produces greater concn (contains CaCl
227.7%, about 75 ℃ of temperature), secondary steam is taken away by vacuum system, and the calcium liquid of greater concn is delivered to the whizzer separated salt through the triple effect discharging pump.
(3) the calcium liquid after the separated salt is imitated liquid-feeding pump by one and is entered an effect well heater, one imitate in the well heater with outside the living steam heat-exchanging of 1.6MPa of confession, and imitate recycle pump by one and imitate well heater and one and imitate circulating and evaporating between the separator, separate, calcium liquid is further concentrated (contain CaCl
250%, about 150 ℃ of temperature) send into next process after, its secondary steam enters two and imitates well heaters as its thermal source.
For realizing aforesaid method, two effect preheaters link to each other with the clear liquid groove, and the clear liquid groove is imitated well heater by two of two effect liquid-feeding pumps and two effect vapo(u)rization systems and linked to each other, and two effect well heaters, two are imitated separators, two effect recycle pumps are continuous successively, form a circulating and evaporating system; Two imitate separator is connected with the triple effect well heater of triple effect evaporation system by liquid-transport pipe-line, and structure and action principle that vapo(u)rization system and two effect vapo(u)rization systems are imitated in triple effect evaporation system and are similar.The triple effect separator is connected with desalination whizzer feeding end by liquid-transport pipe-line and triple effect discharging pump, the effect well heater that the discharge end of desalination whizzer is imitated in a liquid-feeding pump and the effect vapo(u)rization system by liquid-transport pipe-line and links to each other, and an effect separator is imitated well heater by secondary steam pipeline and two and linked to each other.
Claims (1)
1. the method by ammonia-soda process waste liquid direct production calcium chloride the steps include:
(1) will contain CaCl
2Ammonia-soda process waste liquid about 10% shines in the pond on beaches at different levels and utilizes solar energy to evaporate in the open, ultimate density reaches about 15% and delivers to two effect preheaters, imitate liquid-feeding pumps by two after preheating reaches about 70 ℃ and send into the 2 two effect well heaters of imitating in the vapo(u)rization systems, in this and the secondary steam heat exchange of imitating separator from one in the effect vapo(u)rization system, the calcium liquid that heats enters two and imitates separator, and by two effect recycle pumps circulating and evaporating between two effect well heaters and two effect separators, separate, secondary steam enters triple effect well heater in the triple effect evaporation system as its thermal source by the separator upper pipe, and the calcium liquid of certified concentration enters the triple effect evaporation system and continues evaporation and concentrating;
(2) calcium liquid by the triple effect recycle pump in circulating and evaporating between triple effect well heater and the triple effect separator, separate, produce the calcium liquid of greater concn, secondary steam is taken away by vacuum system, the calcium liquid of greater concn is delivered to the whizzer separated salt through the triple effect discharging pump;
(3) the calcium liquid after the separated salt is imitated liquid-feeding pump by one and is entered an effect well heater, one imitate in the well heater with outside the living steam heat-exchanging of 1.6MPa of confession, and imitate recycle pump by one and imitate well heater and one and imitate circulating and evaporating between the separator, separate, make calcium liquid be condensed into finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101393046A CN101125673A (en) | 2007-08-28 | 2007-08-28 | Method for directly producing calcium chloride from ammonia-soda process waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101393046A CN101125673A (en) | 2007-08-28 | 2007-08-28 | Method for directly producing calcium chloride from ammonia-soda process waste liquid |
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| CN101125673A true CN101125673A (en) | 2008-02-20 |
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| CNA2007101393046A Pending CN101125673A (en) | 2007-08-28 | 2007-08-28 | Method for directly producing calcium chloride from ammonia-soda process waste liquid |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898777A (en) * | 2010-07-06 | 2010-12-01 | 北京航天动力研究所 | Device for producing calcium chloride dihydrate by taking waste gas as heat source and method thereof |
| CN102145912A (en) * | 2011-03-01 | 2011-08-10 | 大连大化工程设计有限公司 | Process for preparing calcium chloride solution by utilizing ammonia soda filtration mother liquor |
| CN102641602A (en) * | 2011-02-18 | 2012-08-22 | 上智企业有限公司 | Multiple-effect evaporator system |
| CN102657947A (en) * | 2012-05-18 | 2012-09-12 | 重庆紫光天化蛋氨酸有限责任公司 | Four-effect cross-flow evaporation system and process |
| CN103274440A (en) * | 2013-06-26 | 2013-09-04 | 唐山三友志达钙业有限公司 | Acid adding device, as well as method and equipment for producing calcium chloride with acid adding device |
| CN104495903A (en) * | 2014-11-27 | 2015-04-08 | 大柴旦吉利化工有限公司 | Method for producing highly pure anhydrous calcium chloride in high attitude regions |
| CN108249467A (en) * | 2017-12-28 | 2018-07-06 | 中国海洋石油集团有限公司 | A kind of method of Calcium Chloride Production good antiscale property |
-
2007
- 2007-08-28 CN CNA2007101393046A patent/CN101125673A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898777A (en) * | 2010-07-06 | 2010-12-01 | 北京航天动力研究所 | Device for producing calcium chloride dihydrate by taking waste gas as heat source and method thereof |
| CN101898777B (en) * | 2010-07-06 | 2012-08-08 | 北京航天动力研究所 | Device for producing calcium chloride dihydrate by taking waste gas as heat source and method thereof |
| CN102641602A (en) * | 2011-02-18 | 2012-08-22 | 上智企业有限公司 | Multiple-effect evaporator system |
| CN102145912A (en) * | 2011-03-01 | 2011-08-10 | 大连大化工程设计有限公司 | Process for preparing calcium chloride solution by utilizing ammonia soda filtration mother liquor |
| CN102145912B (en) * | 2011-03-01 | 2012-11-21 | 大连大化工程设计有限公司 | Process for preparing calcium chloride solution by utilizing ammonia soda filtration mother liquor |
| CN102657947A (en) * | 2012-05-18 | 2012-09-12 | 重庆紫光天化蛋氨酸有限责任公司 | Four-effect cross-flow evaporation system and process |
| CN103274440A (en) * | 2013-06-26 | 2013-09-04 | 唐山三友志达钙业有限公司 | Acid adding device, as well as method and equipment for producing calcium chloride with acid adding device |
| CN104495903A (en) * | 2014-11-27 | 2015-04-08 | 大柴旦吉利化工有限公司 | Method for producing highly pure anhydrous calcium chloride in high attitude regions |
| CN108249467A (en) * | 2017-12-28 | 2018-07-06 | 中国海洋石油集团有限公司 | A kind of method of Calcium Chloride Production good antiscale property |
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Open date: 20080220 |