CN101792156B - Method for producing granular sodium hydroxide and coproducing calcium carbonate by using carbide slag - Google Patents
Method for producing granular sodium hydroxide and coproducing calcium carbonate by using carbide slag Download PDFInfo
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- CN101792156B CN101792156B CN2010101577094A CN201010157709A CN101792156B CN 101792156 B CN101792156 B CN 101792156B CN 2010101577094 A CN2010101577094 A CN 2010101577094A CN 201010157709 A CN201010157709 A CN 201010157709A CN 101792156 B CN101792156 B CN 101792156B
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- sodium hydroxide
- calcium carbonate
- carbide slag
- drying machine
- producing
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims abstract description 207
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 77
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 39
- 239000002893 slag Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 15
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 15
- 238000004821 distillation Methods 0.000 claims abstract description 6
- 239000000945 filler Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 14
- 235000012204 lemonade/lime carbonate Nutrition 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000002594 sorbent Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000003826 tablet Substances 0.000 claims description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 4
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 4
- 239000004571 lime Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000011575 calcium Substances 0.000 abstract description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- 235000019738 Limestone Nutrition 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 238000005119 centrifugation Methods 0.000 abstract 1
- 239000006028 limestone Substances 0.000 abstract 1
- 238000005453 pelletization Methods 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 53
- 239000002994 raw material Substances 0.000 description 5
- 239000005997 Calcium carbide Substances 0.000 description 4
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 238000009993 causticizing Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- JNVCSEDACVAATK-UHFFFAOYSA-L [Ca+2].[S-]SSS[S-] Chemical compound [Ca+2].[S-]SSS[S-] JNVCSEDACVAATK-UHFFFAOYSA-L 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229940051851 sulfurated lime Drugs 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for producing granular sodium hydroxide and coproducing calcium carbonate by using carbide slag. The carbide slag and soda ash carries out chemical reaction according to certain proportion to generate mixed liquid of sodium hydroxide and calcium carbonate. Sodium hydroxide dilute solution and a calcium carbonate wet product are obtained by centrifugation; the sodium hydroxide dilute solution is directly conveyed for distillation to obtain 80% semisolid sodium hydroxide, the semisolid sodium hydroxide, a drying absorbent and fillers are mixed, pelletized by a pelletizing machine, dried by a second drying machine and packaged into granular sodium hydroxide; and the calcium carbonate wet product is dried by a first drying machine, and crushed by a crusher to obtain a calcium carbonate product. The method uses calcium resources in the carbide slag to produce lime, avoids the pollution of the carbide slag to the environment, reduces the damage of limestone quarrying to the environment, simultaneously effectively reduces the production cost of liquid sodium hydroxide and is a very economic and effective method.
Description
Technical field
The present invention relates to the utilization and the improvement of industrial waste product carbide slag, particularly, relate to a kind of method of producing granular sodium hydroxide and co-producing calcium carbonate with carbide slag.
Background technology
Carbide slag is that the resistates that acetylene produced is produced in the calcium carbide hydrolysis, be the emulsion of solid content at 8%-10%, have another name called calcium carbide mud, its main chemical compositions is a calcium hydroxide, also contain the aqueous solution such as solid impurities such as Calucium Silicate powder, calcium aluminate, ferrosilicon and breeze and sulfurated lime, calcium hydroxide, acetylene, being a kind of strong basicity that is, being rich in abundant calcium resource, is that can to produce a series of needs such as lime carbonate, cement calcareous be the product of raw material to raw material with it.But because wherein impurities is more, water content is high, composition is complicated, undressed carbide slag can't directly utilize.On the other hand, flourish along with the calcium carbide industry, the quantity discharged of carbide slag also increases day by day, factory's discharging calcium carbide mud of producing 200,000 tons of PVC year reaches 3,600,000 tons/year, a large amount of carbide slags can't effectively utilize, directly pile up, cause the soil artificially to alkalize, ecotope is caused the pollution that is difficult to recover severe contamination farmland and underground water.
The method of producing sodium hydroxide at present mainly contains two kinds, and the one, causticizing process, this method is a raw material with soda ash (yellow soda ash) solution and lime, makes it that causticizing reaction take place, and generates sodium hydroxide (caustic soda) solution and precipitation of calcium carbonate (lime mud).Behind the insolubless such as elimination precipitation of calcium carbonate, evaporating solns and the sodium hydroxide (caustic soda) of liquid or solid.Precipitation of calcium carbonate can be used as the raw material of cement etc. after washing, the lime carbonate slag of generation can reclaim calcium oxide (unslaked lime) and partial CO 2 through clean, dry, calcining.
Compare with electrolytic process hydrogen manufacturing sodium oxide (caustic soda), because soda ash is the higher raw material of purity, sodium chloride-containing is few, and the purity of gained sodium hydroxide (caustic soda) is also higher.But need to consume another kind of important product soda ash.
Therefore, be necessary to explore the method for new production sodium hydroxide.
Summary of the invention
In order to address the above problem, the invention provides a kind of method of producing granular sodium hydroxide and co-producing calcium carbonate, this method turns waste into wealth; consume a large amount of waste residues, protected environment, production cost is low; production process is simple, is a method that has than the large economy benefit.
Technical scheme of the present invention is as follows: a kind of method of producing granular sodium hydroxide and co-producing calcium carbonate with carbide slag comprises the steps:
The carbide slag water is modulated into emulsion, the soda ash good with dissolving is in the low-temp reaction device (1) of 1: 1.23～1.63 input temperature controllables according to carbide slag and soda ash pure substance mass ratio, carry out chemical reaction under stirring, temperature of reaction is controlled at 40～50 ℃, reacted 2～5 hours, and obtained the mixed solution of sodium hydroxide and lime carbonate; The mixed solution of sodium hydroxide and lime carbonate is centrifugal through whizzer (2), obtain sodium hydroxide solution and calcium carbonate wet product after the separation, sodium hydroxide solution is through vacuum distilling apparatus (3) underpressure distillation, obtaining mass concentration is 80% semi-solid sodium hydroxide (4), semi-solid sodium hydroxide (4) mixes with dry sorbent material and filler, tablets press (8) granulation, second drying machine (9) drying, packing becomes granular sodium hydroxide (10); The calcium carbonate wet product are through first drying machine (5) oven dry, and pulverizer (6) is pulverized, and obtains calcium carbonate product (7).
The chemical principle that aforesaid method relates to is:
Ca(OH)
2+Na
2CO
3＝2NaOH+CaCO
3
Method of producing granular sodium hydroxide and co-producing calcium carbonate with carbide slag of the present invention, utilize the calcareous resource in the carbide slag to produce lime, avoid the pollution of carbide slag to environment, environment damage when reducing the Wingdale exploitation, having effectively reduced the production cost of liquid sodium hydroxide simultaneously, is a very cost-effective method.
Description of drawings
Fig. 1 of the present inventionly produces the process flow sheet of the method for granular sodium hydroxide and co-producing calcium carbonate with carbide slag, wherein
1---reactor, 2---whizzer, 3---vacuum distilling apparatus,
4---semi-solid sodium hydroxide, 5---first drying machine, 6---pulverizer,
7---calcium carbonate product, 8---tablets press, 9---second drying machine,
10---granular sodium hydroxide.
Embodiment
Below in conjunction with specific embodiment the method with carbide slag production granular sodium hydroxide and co-producing calcium carbonate of the present invention is described further and illustrates.
Embodiment one:
A kind of method of producing granular sodium hydroxide and co-producing calcium carbonate with carbide slag comprises the steps:
800kg carbide slag water is modulated into emulsion, the soda ash good with dissolving is to drop at 1: 1.43 in the low-temp reaction device (1) of temperature controllable according to carbide slag and soda ash pure substance mass ratio, carry out chemical reaction under stirring, temperature of reaction is controlled at 40～50 ℃, reacted 3 hours, and obtained the mixed solution of sodium hydroxide and lime carbonate; The mixed solution of sodium hydroxide and lime carbonate is centrifugal through whizzer (2), obtain sodium hydroxide solution after the separation, wherein sodium hydrate content is 863.4kg, with the calcium carbonate wet product, wherein calcium carbonate content is 1079.24kg, sodium hydroxide solution steams through vacuum sautes device (3) underpressure distillation, obtaining mass concentration is 80% semi-solid sodium hydroxide 863.4kg, semi-solid sodium hydroxide mixes with dry sorbent material and filler, through tablets press (8) granulation, second drying machine (9) drying, packing becomes granular sodium hydroxide (10); Calcium carbonate wet product drying machine (5) oven dry, pulverizer (6) is pulverized, and obtains calcium carbonate product (7) 107924kg.
Embodiment two:
A kind of method of producing granular sodium hydroxide and co-producing calcium carbonate with carbide slag comprises the steps:
800kg carbide slag water is modulated into emulsion, the soda ash good with dissolving is to drop at 1: 1.23 in the low-temp reaction device (1) of temperature controllable according to carbide slag and soda ash pure substance mass ratio, carry out chemical reaction under stirring, temperature of reaction is controlled at 45 ℃, reacted 2 hours, and obtained the mixed solution of sodium hydroxide and lime carbonate; The mixed solution of sodium hydroxide and lime carbonate is centrifugal through whizzer (2), obtain sodium hydroxide solution after the separation, wherein sodium hydrate content is 742.64kg, with the calcium carbonate wet product, wherein calcium carbonate content is 928.3kg, sodium hydroxide solution is through vacuum distilling apparatus (3) underpressure distillation, obtaining mass concentration is 80% semi-solid sodium hydroxide 742.64kg, semi-solid sodium hydroxide mixes with dry sorbent material and filler, through tablets press (8) granulation, second drying machine (9) drying, packing becomes granular sodium hydroxide (10); Calcium carbonate wet product drying machine (5) oven dry, pulverizer (6) is pulverized, and obtains calcium carbonate product (7) 928.3kg.
Embodiment three:
A kind of method of producing granular sodium hydroxide and co-producing calcium carbonate with carbide slag comprises the steps:
800kg carbide slag water is modulated into emulsion, the soda ash good with dissolving is to drop at 1: 1.63 in the low-temp reaction device (1) of temperature controllable according to carbide slag and soda ash pure substance mass ratio, carry out chemical reaction under stirring, temperature of reaction is controlled at 50 ℃, reacted 5 hours, and obtained the mixed solution of sodium hydroxide and lime carbonate; The mixed solution of sodium hydroxide and lime carbonate is centrifugal through whizzer (2), obtain sodium hydroxide solution after the separation, wherein sodium hydrate content is 864.86kg, with the calcium carbonate wet product, wherein calcium carbonate content is 1081.08kg, sodium hydroxide solution is through vacuum distilling apparatus (3) underpressure distillation, obtaining mass concentration is 80% semi-solid sodium hydroxide 864.86kg, semi-solid sodium hydroxide mixes with dry sorbent material and filler, through tablets press (8) granulation, second drying machine (9) drying, packing becomes granular sodium hydroxide (10); Calcium carbonate wet product drying machine (5) oven dry, pulverizer (6) is pulverized, and obtains calcium carbonate product (7) 1081.08kg.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with described feature of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
Claims (1)
1. a method of producing granular sodium hydroxide and co-producing calcium carbonate with carbide slag is characterized in that, comprises the steps:
The carbide slag water is modulated into emulsion, the soda ash good with dissolving is in the low-temp reaction device (1) of 1: 1.23～1.63 input temperature controllables according to carbide slag and soda ash pure substance mass ratio, carry out chemical reaction under stirring, temperature of reaction is controlled at 40～50 ℃, reacted 2～5 hours, and obtained the mixed solution of sodium hydroxide and lime carbonate; The mixed solution of sodium hydroxide and lime carbonate is centrifugal through whizzer (2), obtain sodium hydroxide solution and calcium carbonate wet product after the separation, sodium hydroxide solution is through vacuum distilling apparatus (3) underpressure distillation, obtaining mass concentration is 80% semi-solid sodium hydroxide (4), semi-solid sodium hydroxide (4) mixes with dry sorbent material and filler, tablets press (8) granulation, second drying machine (9) drying, packing becomes granular sodium hydroxide (10); The calcium carbonate wet product are through first drying machine (5) oven dry, and pulverizer (6) is pulverized, and obtains calcium carbonate product (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101577094A CN101792156B (en) | 2009-07-17 | 2010-03-24 | Method for producing granular sodium hydroxide and coproducing calcium carbonate by using carbide slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910041212A CN101648719A (en) | 2009-07-17 | 2009-07-17 | Method for producing granular sodium hydroxide and co-producing calcium carbonate |
| CN200910041212.3 | 2009-07-17 | ||
| CN2010101577094A CN101792156B (en) | 2009-07-17 | 2010-03-24 | Method for producing granular sodium hydroxide and coproducing calcium carbonate by using carbide slag |
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| CN101792156B true CN101792156B (en) | 2011-06-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113884A (en) * | 1994-06-01 | 1995-12-27 | 门伟 | Producing method for caustic soda |
| CN101092240A (en) * | 2006-06-23 | 2007-12-26 | 北京清华紫光英力化工技术有限责任公司 | New technique for preparing sodium hydroxide |
| CN101264920A (en) * | 2008-04-17 | 2008-09-17 | 贵州大学 | Method for preparing micro-fine and ultra-fine calcium carbonate of different crystal forms from carbide slag |
-
2010
- 2010-03-24 CN CN2010101577094A patent/CN101792156B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113884A (en) * | 1994-06-01 | 1995-12-27 | 门伟 | Producing method for caustic soda |
| CN101092240A (en) * | 2006-06-23 | 2007-12-26 | 北京清华紫光英力化工技术有限责任公司 | New technique for preparing sodium hydroxide |
| CN101264920A (en) * | 2008-04-17 | 2008-09-17 | 贵州大学 | Method for preparing micro-fine and ultra-fine calcium carbonate of different crystal forms from carbide slag |
Non-Patent Citations (1)
| Title |
|---|
| 闫琨.电石渣综合利用研究进展.《环境科学导刊》.2008,第27卷103-106. * |
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