CN101624181A - Material circulating system formed in chlor-alkali industry by using hydrated limes and chlorine water - Google Patents
Material circulating system formed in chlor-alkali industry by using hydrated limes and chlorine water Download PDFInfo
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- CN101624181A CN101624181A CN200910037555A CN200910037555A CN101624181A CN 101624181 A CN101624181 A CN 101624181A CN 200910037555 A CN200910037555 A CN 200910037555A CN 200910037555 A CN200910037555 A CN 200910037555A CN 101624181 A CN101624181 A CN 101624181A
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- chlorine
- calcium chloride
- calcium
- chlor
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Abstract
The invention discloses a material circulating system formed in the chlor-alkali industry by using hydrated limes and chlorine water. The system is specifically as follows: after being preprocessed, the hydrated limes react with hydrochloric acid and the reactant is filtered to obtain calcium chloride solution; the filtrate and sodium hydroxide generated in electrolysis in chlor-alkali plants generate high-purity calcium hydroxide; bleaching powder concentrate is produced after the calcium hydroxide is chloridized, centrifuged, dried and broken; filter cakes react with the hydrochloric acid to produce active carbon; calcium chloride generated in the reaction can be produced into calcium chloride dehydrate and calcium chloride anhydrous; after being processed, sodium chloride serves as a raw material for electrolysis. The system effectively solves the processing and disposal problems of the hydrated limes and the raw material problems in the chlor-alkali industry, embodies the circular economy, produces the byproducts including the bleaching powder concentrate and the active carbon and the products including the calcium chloride dehydrate and the calcium chloride anhydrous and improves the deep processing capabilities of the enterprises.
Description
Technical field:
The invention belongs to the technical field of three chemical wastes, particularly the material circulating system that forms in chlorine industry with white lime and chlorine water.
Technical background:
At present, it is returning salt pond circulationization salt that the chlorine water utilization of chlor-alkali plant has sub-fraction, his disposal of three wastes mainly still neutralizes by alkaline matter, generally is to adopt carbide slag or white lime to neutralize to become Losantin and calcium chloride is directly drained, improvement completely.Though removed chlorine and chlorine root and hypochlorous acid and hypochlorite, become corresponding salt and alleviated pollution,, pollution substance still exists.The present invention has not only effectively administered the pollution of chlor-alkali plant chlorine water, makes it to turn waste into wealth to become Chemicals, has also solved the problem that the raw material of electrolytic industry salt recycles.
Summary of the invention:
The invention provides a kind of material circulating system that forms in chlorine industry with white lime and chlorine water, use this technology and effectively administered the pollution of chlorine water when reaching zero release, the Industrial Salt that also reasonably used the indirect generation of chemical reaction, but also can the round-robin utilization.
For achieving the above object, technical scheme of the present invention is: chlorine industry potroom (1) electrolytic sodium chloride, (2) product is a sodium hydroxide in the workshop, (3) product is a chlorine in the workshop, sodium hydroxide, chlorine and white lime finally generate sodium-chlor through a series of chemical reaction in workshop (4), sodium-chlor returns potroom (1) again, so forms circulation.
Concrete technology in workshop (4) is as follows:
White lime and unglazed chlorine water are by weight 1: 2-6 injects the pretreater (5) that has whipping appts and stirs and become uniform emulsion, natural subsidence 20-50 second, forms the calcium hydroxide emulsion of suspension; Calcium hydroxide emulsion and hydrochloric acid are pressed pure substance quality 1: 0.45-1.05 and are injected cleaner (6), stir to make material reach complete reaction in 10-15 minute, after reaction solution filters, form calcium chloride filtrate and filter cake, and filter cake is a Losantin chlorinated lime finished product just.The sodium hydroxide that filtrate calcium chloride and electrolysis generate is pressed pure substance quality 1: 0.4-1.1 and is injected the stirring of auxiliary reactor (7) lining, generates high-purity hydrogen calcium oxide and more purified sodium chloride solution, and the principles of chemistry are as follows:
Ca(OH)
2+2HCl＝＝＝CaCl
2+2H
2O
Ca(OH)
2+Cl
2+H
+＝＝CaCl
2+H
2O
Ca(OH)
2+HClO+H
++ClO
-＝＝Ca(ClO)
2+2H
2O
CaCl
2+2NaOH＝＝＝Ca(OH)
2+2NaCl
The high-purity hydrogen calcium oxide washs three times with clear water, be admitted to main reactor (8) lining then, wherein feeding chlor-alkali plant electrolysis generation chlorine uniformly by pure substance amount 1: 0.4-1.1 stirs, reaction generates white precipitate and calcium chloride solution, with cl gas flow scale Numerical Control reaction end, go up reading when table and stop both being the chlorination terminal point when constant that precipitation is sent into drying machine (10) drying after separating with whizzer (9), through the existing high test bleaching powder finished product of crushing packing, the principles of chemistry are as follows:
8Ca(OH)
2+6Cl
2＝＝＝3Ca(ClO)
2·2Ca(OH)
2·2H
2O+3CaCl
2+4H
2O；
The hydrochloric acid soln of filter cake and concentration 5-15% reacts, and reaction result will make the hydrochloric acid surplus, filters, and filter residue washs with clear water, handles both having obtained fine gac goods with zinc chloride activation, and the principles of chemistry are as follows:
[Ca(OH)
2+C]+2HCl＝＝＝CaCl
2+2H
2O+C；
Calcium chloride is made calcium chloride dihydrate and anhydrous chlorides of rase calcium product through whizzer (11) and distiller (12).
Description of drawings
Fig. 1: the present invention's synoptic diagram that circulates
1---the terminal (sodium chloride electrolyte) of chlor-alkali plant potroom material circulating system,
2---sodium hydroxide is made with extra care workshop (sodium hydroxide product),
3---between the chlorine collecting cart (chlorine product),
4---sodium-chlor produces the workshop
Fig. 2: the process flow sheet in the workshop 4
5---pretreater, 6---cleaner, 7---auxiliary reactor,
8---main reactor, 9---whizzer, 10---drying machine
11---the calcium whizzer, 12---the calcium chloride distiller.
Embodiment
To describe preferred embodiment of the present invention below, but content of the present invention is not limited to this fully.
Embodiment 1
(calcium hydroxide content is 90% to 100kg white lime; The siccative meter) and the unglazed chlorine water of 300kg inject the pretreater (5) that has whipping appts and stir and become uniform emulsion, natural subsidence 30s forms the calcium hydroxide emulsion of suspension; Calcium hydroxide emulsion and hydrochloric acid are pressed the pure substance quality and are injected cleaner (6) at 1: 0.8, stir to make material reach complete reaction in 10 minutes, after reaction solution filters, form calcium chloride filtrate and filter cake; The sodium hydroxide that calcium chloride filtrate and electrolysis generate is pressed the pure substance quality and is injected the stirring of auxiliary reactor (7) lining at 1: 0.6, generate high-purity hydrogen calcium oxide and more purified sodium chloride solution and contain solute 93.28kg, sodium chloride solution is through soda ash, send into potroom after the salt acid treating and carry out the potroom recycle, the high-purity hydrogen calcium oxide washs three times with clear water, be admitted to main reactor (8) lining then, wherein uniformly feeding chlor-alkali plant electrolysis generation chlorine at 1: 0.7 by the pure substance amount stirs, reaction generates white precipitate and calcium chloride solution, with cl gas flow scale Numerical Control reaction end, when table is the chlorination terminal point when upward reading is constant, precipitation is sent into drying machine (10) drying after separating with whizzer (9), through the existing high test bleaching powder finished product of crushing packing 59.04kg, the hydrochloric acid soln of filter cake and concentration 10% reacts, reaction result will make the hydrochloric acid surplus, filter, filter residue washs with clear water, both obtained fine gac goods 6kg with the zinc chloride activation processing, calcium chloride is made the 35.77kg calcium chloride dihydrate through whizzer (11) and distiller (12).
Embodiment 2
(calcium hydroxide content is 90% for technical process such as embodiment 100kg white lime; The siccative meter) and 600kg water, natural subsidence 50s, calcium hydroxide emulsion and hydrochloric acid were pressed the pure substance quality 1: 1.2, stirred 10 minutes, the sodium hydroxide that calcium chloride filtrate and electrolysis generate was pressed the pure substance quality 1: 1.1, make more purified sodium chloride solution and contain solute 134.39kg, high-purity hydrogen calcium oxide and chlorine pure substance amount 1: 1.1, existing high test bleaching powder finished product 87.44kg, the hydrochloric acid soln of filter cake and concentration 10% reacts, both obtain fine gac goods 6kg, made the 52.98kg calcium chloride dihydrate.
Embodiment 3
(calcium hydroxide content is 90% for technical process such as embodiment 100kg white lime; The siccative meter) and 200kg water, natural subsidence 20s, calcium hydroxide emulsion and hydrochloric acid were pressed the pure substance quality 1: 0.6, stirred 10 minutes, the sodium hydroxide that calcium chloride filtrate and electrolysis generate was pressed the pure substance quality 1: 0.4, make more purified sodium chloride solution and contain solute 46.64kg, high-purity hydrogen calcium oxide and chlorine pure substance amount 1: 0.4, existing high test bleaching powder finished product 16.87kg, the hydrochloric acid soln of filter cake and concentration 10% reacts, both obtain fine gac goods 6kg, made the 10.22kg calcium chloride dihydrate.
Claims (6)
1. the material circulating system that forms in chlorine industry of white lime and chlorine water, it is characterized in that chlorine industry potroom (1) electrolytic sodium chloride, (2) product is a sodium hydroxide in the workshop, (3) product is a chlorine in the workshop, sodium hydroxide, chlorine and useless carbide slag finally generate sodium chloride solution through a series of chemical reaction in workshop (4), sodium chloride solution returns potroom (1), so forms circulation.
2. the described a kind of plaster of Paris of claim 1 and chlorine water is characterized in that at the material circulating system that chlorine industry forms the product process of the sodium-chlor in the described workshop (4) is:
White lime and chlorine water are by weight 1: 2-6 injects the pretreater (5) that has whipping appts and stirs and become uniform emulsion, natural subsidence 20-50 second, forms the calcium hydroxide emulsion of suspension; Calcium hydroxide emulsion and hydrochloric acid are pressed pure substance quality 1: 0.45-1.05 and are injected cleaner (6), stir to make material reach complete reaction in 10-15 minute, after reaction solution filters, form calcium chloride filtrate and filter cake; The sodium hydroxide that calcium chloride filtrate and electrolysis generate is pressed pure substance quality 1: 0.4-1.1 and is injected the stirring of auxiliary reactor (7) lining, generates high-purity hydrogen calcium oxide and sodium chloride solution.
3. claim 1 or 2 described a kind of white limes and chlorine water be at the material circulating system that chlorine industry forms, and it is characterized in that described sodium chloride solution sends into potroom and carry out the potroom recycle after soda ash, salt acid treating.
4. described a kind of white lime of claim 2 and chlorine water are at the material circulating system of chlorine industry formation, it is characterized in that described high-purity hydrogen calcium oxide washs three times with clear water, be admitted to main reactor (8) lining then, wherein feeding chlor-alkali plant electrolysis generation chlorine uniformly by pure substance amount 1: 0.4-1.1 stirs, reaction generates white precipitate and calcium chloride solution, with cl gas flow scale Numerical Control reaction end, when table is the chlorination terminal point when upward reading is constant, precipitation is sent into drying machine (10) drying after separating with whizzer (9), through the existing high test bleaching powder finished product of crushing packing.
5. described a kind of white lime of claim 2 and chlorine water are at the material circulating system of chlorine industry formation, the hydrochloric acid soln that it is characterized in that described filter cake and concentration 5-15% reacts, reaction result will make the hydrochloric acid surplus, filter, filter residue washs with clear water, handles both having obtained fine gac goods with zinc chloride activation.
6. described a kind of white lime of claim 3 and chlorine water is characterized in that at the material circulating system that chlorine industry forms described calcium chloride passes through whizzer (11) and distiller (12) is made calcium chloride dihydrate and anhydrous chlorides of rase calcium product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910037555A CN101624181A (en) | 2009-03-03 | 2009-03-03 | Material circulating system formed in chlor-alkali industry by using hydrated limes and chlorine water |
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|---|---|---|---|
| CN200910037555A CN101624181A (en) | 2009-03-03 | 2009-03-03 | Material circulating system formed in chlor-alkali industry by using hydrated limes and chlorine water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607590A (en) * | 2018-12-26 | 2019-04-12 | 四川龙蟒磷化工有限公司 | A kind of preparation method of calcium chloride |
| CN115697896A (en) * | 2020-05-01 | 2023-02-03 | 麻省理工学院 | Use of reactor effluent for purification of materials and related systems |
-
2009
- 2009-03-03 CN CN200910037555A patent/CN101624181A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607590A (en) * | 2018-12-26 | 2019-04-12 | 四川龙蟒磷化工有限公司 | A kind of preparation method of calcium chloride |
| CN115697896A (en) * | 2020-05-01 | 2023-02-03 | 麻省理工学院 | Use of reactor effluent for purification of materials and related systems |
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Address after: 523000, room five, building 508, Jinhai building, Dongcheng District Tong Road, Dongguan, Guangdong Applicant after: Wang Jiaxing Address before: Wushi Village Primary School in Dongguan city of Dongcheng District province Guangdong road 523000 Lane 1 No. 6 main mountain Applicant before: Wang Jiaxing |
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Application publication date: 20100113 |