CN102583240A - Method for concentrating sea water by using alkaline manufacturing afterheat, extracting bromine and drying salt - Google Patents

Method for concentrating sea water by using alkaline manufacturing afterheat, extracting bromine and drying salt Download PDF

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Publication number
CN102583240A
CN102583240A CN2012100059792A CN201210005979A CN102583240A CN 102583240 A CN102583240 A CN 102583240A CN 2012100059792 A CN2012100059792 A CN 2012100059792A CN 201210005979 A CN201210005979 A CN 201210005979A CN 102583240 A CN102583240 A CN 102583240A
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China
Prior art keywords
bromine
sea water
afterheat
bittern
brine
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Pending
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CN2012100059792A
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Chinese (zh)
Inventor
刘素效
姚旗
黄鲁英
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SHANDONG HAITIAN BIO-CHEMICAL Co Ltd
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SHANDONG HAITIAN BIO-CHEMICAL Co Ltd
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Priority to CN2012100059792A priority Critical patent/CN102583240A/en
Publication of CN102583240A publication Critical patent/CN102583240A/en
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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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

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Abstract

The invention discloses a method for concentrating sea water by using alkaline manufacturing afterheat, extracting bromine and drying salt. Circular sea water is heated by using low-level heat energy afterheat generated in a carbonization process for sodium carbonate production; the sea water is subjected to multi-stage evaporation concentration to form concentrated brine; the bromine is extracted from the concentrated brine; and the concentrated brine from which the bromine is extracted is aired to prepare salt. The problem about the utilization of the low-level heat energy afterheat in the sodium carbonate industry is solved by the method, the method is in accordance with the basic state policy on the construction of a resource-conserving and environment-friendly society, the method greatly promotes energy conservation, environment protection and the development of circular economy in the sodium carbonate industry, and the method has great significance for protecting bay environment.

Description

A kind of method of utilizing system alkali waste heat concentrated seawater to carry bromine, evaporate brine
Technical field
The present invention relates to the alkali making technology field, relates in particular to the method that a kind of concentrated seawater is carried bromine, evaporated brine.
Background technology
The large-lot producer of China's soda ash production industry mostly utilizes solvay soda process soda ash production technique, and multiplex's section all produces a large amount of heat energy in alkali producing process, and enterprise has taked the recycling measure to the domestic large-scale system alkali of the waste heat of some high level heats; But still have a lot of usable afterheat emptying; Or after extracting the indirect cooling of seawater, refrigerated sea water is entered the surrounding waters again, or adopt the cooling of circulation fresh water, waste heat recovery has a high potential; And the Lowlevel thermal energy waste heat that produces for alkali producing process; Domestic soda industry does not have to utilize basically, and for this reason, country advances " soda ash UTILIZATION OF VESIDUAL HEAT IN " as Eleventh Five-Year Plan ten big emphasis energy conservation projects.
At present, the Lowlevel thermal energy waste heat that produces during soda ash is produced all enters the surrounding waters with refrigerated sea water after the cooling through extracting seawater indirectly again, has not only wasted the energy, and resource is not fully utilized, and has strengthened the operational cost of enterprise.
During soda ash was produced, carbonation process was a thermopositive reaction in carbonization process, and its reaction equation is:
NH 4OH+CO 2——NH 4HCO 3+64.5kJ/mol；
NaCl+NH 4HCO 3——NaHCO 3+NH 4Cl+15.4kJ/mol。
For making the carrying out of reaction ability continous-stable, must continuously shift out the heat that reaction generates, therefore need a large amount of water coolants that heat is derived, with the best temperature of reaction of assurance carbonization process, Hai Tian reaches the average annual 5000m capable of using of carbonating tower refrigerated sea water in postpartum 3/ h, turnover tower temperature head is greater than 15 ℃, and by per hour circulation primary calculating, 24 times capable of circulation of every day, every cube of total accumulated temperature is greater than 360 ℃/d, and it is to need some talentes to accomplish that average day big like this accumulated temperature utilizes Exposure to Sunlight.
Summary of the invention
Technical problem to be solved by this invention provide a kind of simple, effectively utilize the method that system alkali waste heat concentrated seawater is carried bromine, evaporated brine.
For solving the problems of the technologies described above; Technical scheme of the present invention is: a kind of method of utilizing system alkali waste heat concentrated seawater to carry bromine, evaporate brine; Utilizing soda ash to produce the Lowlevel thermal energy waste heat that produces in the carbonation process process heats circulating seawer; Concentrate through multistage evaporation afterwards and obtain dense bittern, then said dense bittern is carried bromine, the dense bittern that will carry at last behind the bromine is evaporated brine.
As optimized technical scheme, said multistage evaporation is four to Pyatyi evaporation.
The spontaneous evaporation cooling is adopted in cooling.
As optimized technical scheme, said dense bittern is the dense bittern of 14～15 ° of Be.
A kind of system that utilizes system alkali waste heat concentrated seawater to carry bromine, evaporate brine; Comprise the carbonating tower group; Said carbonating tower group is passed through pipe connection to evaporation tank; To the bittern storehouse, to bromo blowing tower, said bromo blowing tower water port is communicated to the saltern through changeing the halogen ditch to said evaporation tank venting port through pipe connection in said bittern storehouse through pipe connection.
As optimized technical scheme, said carbonating tower group is the carbonating tower group of three groups of parallel connections.
As optimized technical scheme, state evaporation tank and be four to the Pyatyi evaporation tank.
During production; Subsurface brine is sent into lime slaking machine through propeller pump; Dispatch from the factory simultaneously leave standstill lime antiquated sand after the efflorescence of depositing 3～5 days through conveyor, lime antiquated sand storehouse, feeding machine in lime slaking machine and bittern hybrid reaction, getting into the ash breast then changes sieve, liquid gets into chute; Further mix mixing with bittern, and accomplish and remove Mg 2+Reaction.Following reaction takes place in the lime in subsurface brine and the antiquated sand in lime slaking machine:
CaO(s)+H 2O(e)＝＝Ca(OH) 2
Ca(OH)+MgCl 2＝＝CaCl 2+Mg(OH) 2↓
The Mg (OH) that produces 2Deposition gets into settling pond with bittern, and clear liquid is sent to salt solution operation salt from the inflow pump forebay through topping-up pump after the slow sedimentation in settling pond and bittern storehouse.
The economic benefit of project
1) waste heat concentrated seawater 2,600,000 m 3, concentrated seawater concentration reaches 14～15 ° of Be, wherein 1,600,000 m 3Can extract bromine, evaporate brine, sell the back by 5 yuan/m 3, can increase by 8,000,000 yuan of benefits; 1,000,000 m 3Be back to use system alkali production system, 100,000 tons of year saving solid material salt, by 100 yuan of calculating per ton, year can be practiced thrift 1,000 ten thousand yuan of costs;
2) reduce seawater and efflux 6,320 ten thousand m 3, by 0.1 yuan/m 3, 6,320,000 yuan of year minimizing effluent charge; Reduce disposable seawater amount of purchase 5,090 ten thousand m 3, by 0.11 yuan/m 3Calculate, save 6,000,000 yuan of production costs.
Social benefit
1) UTILIZATION OF VESIDUAL HEAT IN, particularly low level residual heat integrative are utilized, and realize aspect such as changing waste into resources, have industry demonstration induced effect;
2) be of value to environment protection.
Owing to adopted technique scheme; A kind of method of utilizing system alkali waste heat concentrated seawater to carry bromine, evaporate brine is utilized soda ash to produce the Lowlevel thermal energy waste heat that produces in the carbonation process process circulating seawer is heated, and concentrates through multistage evaporation afterwards and obtains dense bittern; Then said dense bittern is carried bromine; The dense bittern that to carry at last behind the bromine is evaporated brine, and has solved a difficult problem of domestic soda industry Lowlevel thermal energy UTILIZATION OF VESIDUAL HEAT IN, meets country about building resource-conserving and environmentally friendly fundamental state policy;, environment protection energy-conservation and develop a circular economy and have bigger promoter action for soda industry, and significant for the bay milieu protection.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
Below in conjunction with embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment:
A kind of method of utilizing system alkali waste heat concentrated seawater to carry bromine, evaporate brine; Utilizing soda ash to produce the Lowlevel thermal energy waste heat that produces in the carbonation process process heats circulating seawer; Concentrate through multistage evaporation afterwards and obtain dense bittern; Then said dense bittern is carried bromine, the dense bittern that will carry at last behind the bromine is evaporated brine.
As optimized technical scheme, said multistage evaporation is four to Pyatyi evaporation.
The spontaneous evaporation cooling is adopted in cooling.
As optimized technical scheme, said dense bittern is the dense bittern of 14～15 ° of Be.
Be used for realizing the system that utilizes system alkali waste heat concentrated seawater to carry bromine, evaporate brine; Comprise the carbonating tower group; Said carbonating tower group is passed through pipe connection to evaporation tank; To the bittern storehouse, to bromo blowing tower, said bromo blowing tower water port is communicated to the saltern through changeing the halogen ditch to said evaporation tank venting port through pipe connection in said bittern storehouse through pipe connection.
Said carbonating tower group is the carbonating tower group of three groups of parallel connections.
Said evaporation tank is four to the Pyatyi evaporation tank, preferred Pyatyi evaporation tank.
It is that warm seawater with the carbonating tower group goes out carbonation process leads to evaporation tank with GRP pipe that the circulating and evaporating of seawater concentrates, and evaporation tank needs the SP array, and warm seawater is cooled to the into required temperature of carbonating tower group at this last evaporation tank.Boost with pump and to return carbonating tower circulation cooling through another GRP pipe.As long as alkali factory ordinary production, this moves in circles incessantly.At the moisture of evaporation tank, replenish by seawater through evaporating and utilizing bittern to reduce.The energy that the evaporation tank evaporation not only has warm seawater (warm bittern) to bring shines upon the sun power that the evaporation tank water surface absorbs in addition, and the process circulating and evaporating makes the dense bittern of 14～15 ° of Be of seawater simmer down to, gets into bromine factory and carries bromine.
Concentrated brine is carried bromine, and can to select two water storages at evaporation tank dark and near the pond of bromine factory, as the bittern storehouse of bromine factory, at this adjustment bittern to putting forward the bromine optimum temps.Get into the bromo blowing tower acid system then and carry bromine.Carry the energy of the required concentrated brine of bromine unit, the main waste heat that produces in the process of cooling of heavy alkali workshop that utilizes is aided with Exposure to Sunlight.The brominated amount of the bittern of every cube of 14.5 ° of Be is greater than 320 grams, and extraction yield is greater than 83%, and every cube of concentrated brine can propose bromine 270 grams, 1.6 tons of daily output bromines, and concentrated brine is 5900 cubes day by day.Because concentrated brine concentration is high, not influenced by low temperature season, its output, yield are more stable.Annual production by 340 days calculated, and can produce 550 tons/year of bromines.
The said dense halogen of carrying behind the bromine kilogram surplus every cube of sodium chloride-containing of bittern 130 of 14.5 ° of Be of evaporating brine is built the high standard salt pan, and every are of annual output can reach 5.5 to 6 tons of crude salt.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification sheets just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
All are from design of the present invention, and the structural transformation of having done without creative work all drops within protection scope of the present invention.

Claims (3)

1. one kind is utilized the method that alkali waste heat concentrated seawater is carried bromine, evaporated brine of making; It is characterized in that: utilize soda ash to produce the Lowlevel thermal energy waste heat that produces in the carbonation process process circulating seawer is heated; Concentrate through multistage evaporation afterwards and obtain dense bittern; Then said dense bittern is carried bromine, the dense bittern that will carry at last behind the bromine is evaporated brine.
2. a kind of method of utilizing system alkali waste heat concentrated seawater to carry bromine, evaporate brine as claimed in claim 1 is characterized in that: said multistage evaporation is four to the Pyatyi evaporation.
3. a kind of method of utilizing system alkali waste heat concentrated seawater to carry bromine, evaporate brine as claimed in claim 1, it is characterized in that: said dense bittern is the dense bittern of 14～15 ° of Be.
CN2012100059792A 2012-01-10 2012-01-10 Method for concentrating sea water by using alkaline manufacturing afterheat, extracting bromine and drying salt Pending CN102583240A (en)

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Application Number Priority Date Filing Date Title
CN2012100059792A CN102583240A (en) 2012-01-10 2012-01-10 Method for concentrating sea water by using alkaline manufacturing afterheat, extracting bromine and drying salt

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108821465A (en) * 2018-09-10 2018-11-16 唐山三友化工股份有限公司 Utilize the method and its dedicated unit of soda manufacture chemical industry waste heat enrichment concentrated seawater

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1837067A (en) * 2005-03-25 2006-09-27 崔绍静 Research for comprehensive utilization of seawater and brine comprising sea water desalination and soda preparation by saturated Brine
CN100999364A (en) * 2006-05-16 2007-07-18 葛文宇 Comprehensive utilization high advantage zero discharge seawater desalination production technology
CN101081706A (en) * 2006-12-27 2007-12-05 韩建民 Electricity, salt and water co-production sea water desalination system
CN101693564A (en) * 2009-10-20 2010-04-14 葛文宇 Circulating extraction processing combined production technique for realizing comprehensive seawater utilization

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1837067A (en) * 2005-03-25 2006-09-27 崔绍静 Research for comprehensive utilization of seawater and brine comprising sea water desalination and soda preparation by saturated Brine
CN100999364A (en) * 2006-05-16 2007-07-18 葛文宇 Comprehensive utilization high advantage zero discharge seawater desalination production technology
CN101081706A (en) * 2006-12-27 2007-12-05 韩建民 Electricity, salt and water co-production sea water desalination system
CN101693564A (en) * 2009-10-20 2010-04-14 葛文宇 Circulating extraction processing combined production technique for realizing comprehensive seawater utilization

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Title
单光山: "海化集团发展循环经济的探索与实践", 《山东化工》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108821465A (en) * 2018-09-10 2018-11-16 唐山三友化工股份有限公司 Utilize the method and its dedicated unit of soda manufacture chemical industry waste heat enrichment concentrated seawater
CN108821465B (en) * 2018-09-10 2024-03-08 唐山三友化工股份有限公司 Method for producing chemical waste heat enriched seawater by using sodium carbonate and special device thereof

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Application publication date: 20120718