CN100567155C - Calcium carbide mud is used for the method that solvay soda process soda ash is produced - Google Patents
Calcium carbide mud is used for the method that solvay soda process soda ash is produced Download PDFInfo
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- CN100567155C CN100567155C CNB2007101139257A CN200710113925A CN100567155C CN 100567155 C CN100567155 C CN 100567155C CN B2007101139257 A CNB2007101139257 A CN B2007101139257A CN 200710113925 A CN200710113925 A CN 200710113925A CN 100567155 C CN100567155 C CN 100567155C
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- calcium carbide
- mud
- soda ash
- lime
- solvay
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Abstract
The invention discloses a kind of calcium carbide mud and be used for the method that solvay soda process soda ash is produced, remove calcium carbide mud clear liquid, calcium carbide mud clear liquid is back to acetylene production system, and the calcium carbide material-mud after thickening is handled is transported in the solvay soda process soda ash, is deployed into Ca (OH)
2Amount is the milk of lime of 155-165 titre, afterwards synthetic milk of lime is applied to the recovery process and the salt refining operation of ammonia.The present invention has not only solved the problem of environmental pollution that calcium carbide slag cement causes, and has improved the value that calcium carbide mud is recycled, and effectively solves the production of solvay soda process soda ash because of balance milk of lime consumption, the CO that causes
2Superfluous discharging phenomenon has reduced the consumption of solvay soda process soda ash production material Wingdale and coke, and makes the production industry and the solvay soda process soda ash production industry that produce calcium carbide mud realize resource sharing, mutual supplement with each other's advantages.
Description
Technical field
The present invention relates to a kind of calcium carbide slag cement and utilize technology, especially relate to a kind of method that calcium carbide mud is used for the production of solvay soda process soda ash.
Background technology
Calcium carbide mud is calcium carbide CaC
2By product in multiple industry production is produced the calcium carbide mud that produces in the polyvinyl chloride as adopting acetylene method, and its main component is Ca (OH)
2, and containing micro-sulfide, phosphide and acetylene gas etc., pH value is strong basicity near 14.Produce one ton of polyvinyl chloride (PVC) RESINS, approximately producing solid content is the calcium carbide body refuse slurry 9-15 ton of 5-15%, its reaction formula: CaC
2+ 2H
2O → Ca (OH)
2+ C
2H
2Adopt calcium carbide body refuse slurry through the simple physics treatment process the processing of calcium carbide mud at present, as through gravity settling and press filtration, the stillness of night partly is back to production, the calcium carbide body refuse then be used to produce cement, with flyash manufacturing bricks by mixing or stacking, this not only greatly reduces calcium carbide mud recovery utilization rate and recycles and is worth, and the discharging of calcium carbide slag cement is simultaneously piled up and also environment caused great pollution.
Summary of the invention
Technical problem to be solved by this invention has provided and a kind of calcium carbide mud has been used for the method that solvay soda process soda ash is produced, and improves calcium carbide mud and recycles and be worth and the purpose of protection environment to reach.
For solving the problems of the technologies described above, technical scheme of the present invention is: carry out the thickening processing after adopting pulpous state calcium carbide mud discharging waste gas, remove calcium carbide mud clear liquid, calcium carbide mud clear liquid can be back to acetylene generating system, and the calcium carbide material-mud after thickening is handled is deployed into Ca (OH)
2The milk of lime of concentration 155-165 titre is transported to ammonia recovery process and NH in the production of solvay soda process soda ash
4Ammonia is reclaimed in the Cl reaction; With the impurity magnesium ion in the salt refining operation removal salt solution.
The production of solvay soda process soda ash is a kind of soda ash production method that present soda ash production industry is most widely used, be to be main raw material with salt, Wingdale, with ammonia is that middle subsidiary material are produced soda ash, its technological process is: at first refining crude salt is become saturated brine, after removing impurity such as wherein calcium, magnesium ion and making refined brine, inhale ammonia and form ammoniated brine, the carbonic acid gas solid/liquid/gas reactions that produces of ammoniated brine and calcined limestone generates pre-carbodiimide solution then, in advance carbodiimide solution again with the CO of high density
2Gas carries out the sodium bicarbonate suspension that carbonation reaction (being commonly called as carbonization) generates, and the sodium bicarbonate crystallization calcining that obtains is after filtration obtained soda ash product and high concentration CO
2Gas, CO
2Gas participates in carburizing reagent again after cooling, compression.And the filtrated stock and the milk of lime of elimination sodium bicarbonate is reacted to reclaim ammonia wherein.Wherein the main component of milk of lime is Ca (OH)
2, it is to be unslaked lime and CO by Wingdale, coke combustion decomposition in the limestone kiln
2, unslaked lime and water makes by the reaction of unslaked lime ashing operation, reaction formula is
CaCO
3→CaO+CO
2 CaO+H
2O→Ca(OH)
2
Milk of lime mainly is as the salt solution demagging in the salt solution preparation process, Ca (OH)
2With Mg
2+Reaction forms Mg (OH)
2Precipitation is removed through the settling vessel separation, with the assurance brine quality,
Ca(OH)
2+Mg
2+→Mg(OH)
2+Ca
2+
In the ammonia still process recovery process, the Ca in the milk of lime (OH)
2With the ammonium chloride reaction in the filtrated stock,, returns production system and use, and the waste solution of calcium chloride that generates is used for the calcium chloride products production by the ammonia that evaporation is reclaimed:
Ca(OH)
2+2NH
4Cl→CaCl
2+2NH
3+2H
2O
Account in the data at solvay soda process soda ash production material, with the balanced production of milk of lime consumption, CO
2Excess quantity generally maintains between the 15-30%, and the effective constituent of calcium carbide mud is Ca (OH)
2, by calcium carbide mud being deployed into Ca (OH)
2Concentration is that the milk of lime of 155-165 titre is used for the production of solvay soda process soda ash, reduces the amount that adopts Wingdale, coke method to produce milk of lime, can reduce the consumption of Wingdale and coke greatly, also reduces CO simultaneously
2Excess quantity, effectively raise the recycling of calcium carbide mud be worth, also greatly reduce the supplies consumption that solvay soda process soda ash is produced simultaneously.
As a kind of improvement, the calcium carbide material-mud Ca (OH) after thickening can being handled
2Concentration is adjusted into the 34-44 titre, reacts with an amount of unslaked lime and make up water to prepare Ca (OH)
2Amount is the milk of lime of 155-165 titre, and wherein for the conserve water resource, make up water can adopt seawater to replace.Calcium carbide material-mud Ca (OH) after also thickening can being handled
2After concentration is adjusted into the 34-44 titre, prepare Ca (OH) with an amount of unslaked lime hybrid reaction
2Amount is the milk of lime of concentration 155-165 titre, and by adjusting the amount ratio of calcium carbide material-mud and unslaked lime, the concentration of control milk of lime is in 155-165 titre scope.
Wherein milk of lime is used for salt refining that solvay soda process soda ash produces for generating precipitation in salt refining operation and magnesium ion reaction in the salt solution, to remove the magnesium ion in the salt solution.
Synthetic milk of lime is applied to being recovered as in ammonia still process of ammonia, the ammonium chloride reaction in the filtrated stock in producing with soda ash, heated volatile goes out ammonia and reclaims.
As further improvement, described calcium carbide mud is produced the calcium carbide slag cement that the calcium carbide reaction produces in the polyvinyl chloride for adopting acetylene method.In Production of PVC, calcium carbide is behind carbide-feed generator, gas acetylene enters production system, and the pulpous state calcium carbide mud material that produces through the chute knocking of groove shape in air, remove its sulfide that contains, phosphide and acetylene gas etc., through the precipitation thickening, the upper clear supernate overflow is back to production system and recycles then, and the calcium carbide material-mud is adjusted Ca (OH)
2Concentration 34-44 titre after the sampling detection is qualified, adopts the solvay soda process soda factory that is sent to of pump continous-stable to be used to produce Ca (OH)
2Concentration is the qualified milk of lime of 155-165 titre, can adopt the slag stock pump with the carrying out smoothly of favourable production, is used in the salt solution demagging, ammonia recovery process of salt solution operation and NH
4The Cl reaction generates ammonia to realize the recovery of ammonia.If account in the data CO by solvay soda process soda ash production material
2Excess quantity is at the CO of the lower limit surplus 15% of 15-30%
2Balanced production, 10,000 tons of/year Polyvinyl Chloride System, it need supporting solvay soda process soda ash annual output scale be the solvay soda process soda ash of ten thousand tons/year of 6-7 that the carbide slag that produces all digests, and by producing 200000 tons of calculating of polyvinyl chloride per year, if the calcium carbide body refuse that produces is all recycled, only save one in Wingdale, coke, obtain economic benefit every year and reach 5,400 ten thousand yuan.Certainly calcium carbide mud of the present invention be used for the calcium carbide mud of the method for solvay soda process soda ash production also can be from the calcium carbide body refuse that produces in other industry production, and calcium carbide mud can adopt pulpous state, also can adopt solid shape.
This invention has not only solved the problem of environmental pollution that calcium carbide slag cement causes, and has improved the value that calcium carbide mud is recycled, for the comprehensive utilization of calcium carbide mud provides an effective way; Also give the industry of using milk of lime to produce simultaneously, raw material sources are provided.This invention can effectively solve solvay soda process soda ash and produce because of balance milk of lime consumption by the successful Application in solvay soda process production soda industry, causes CO
2Surplus is discharged phenomenon, greatly reduces the consumption of solvay soda process soda ash production material Wingdale and coke, the production industry of realization generation calcium carbide mud waste material and the resource sharing of solvay soda process soda ash production industry, mutual supplement with each other's advantages.
Embodiment
Embodiment one
Adopt carbide acetylene method to produce the calcium carbide mud of polyvinyl chloride generation through equipment such as chute, thickeners, make calcium carbide mud that enough exposing to the sun the sky time be arranged, to remove sulfide, phosphide and acetylene gas etc. in the remaining calcium carbide mud, after calcium carbide mud is through the thickening of thickener precipitation, the clear liquid overflow is recycled; And the calcium carbide material-mud that will precipitate after thickening is handled is qualified after pump delivery in solvay soda process soda ash production process, is modulated into Ca (OH) through the sampling detection
2Concentration is the milk of lime of 160 titres, is used for the ammonia recovery process, with the ammonium chloride reaction in the filtrated stock of elimination sodium bicarbonate, reclaims ammonia by evaporation; And the magnesium ion reaction that is used for refined brine preparation process and salt solution forms Mg (OH)
2Precipitation is removed Mg (OH) through the settling vessel separation
2Precipitation is to guarantee brine quality.
Embodiment two
Calcium carbide mud precipitates thickening and handles after the sky discharging waste gas of exposing to the sun in settling vessel, the upper clear supernate overflow is recycled; And the calcium carbide material-mud that will precipitate after thickening is handled is modulated into Ca (OH)
2Concentration is 39 titres, through sampling detect qualified after, the unslaked lime ashing operation in producing toward solvay soda process soda ash with the conveying of pump continous-stable, by calcium carbide mud: the unslaked lime weight ratio is 1: 2.5 mixed, and adds seawater and carry out the ashing processing, prepares Ca (OH)
2Concentration is the milk of lime of 165 titres, after the sampling detection is qualified, adopt stable being transported in the milk of lime jar of pump to deposit synthetic milk of lime, ammonia recovery process in pump delivery is produced to soda ash in use, with the ammonium chloride reaction in the filtrated stock of elimination sodium bicarbonate, reclaim ammonia by evaporation; Be delivered to the refined brine preparation process and use, with the magnesium ion reaction formation Mg (OH) in the salt solution
2Precipitation is removed Mg (OH) through the settling vessel separation
2Precipitation, with the assurance brine quality, and the ammonia that reclaims returns the production system use.
Embodiment three
Calcium carbide mud precipitates thickening and handles after the sky discharging waste gas of exposing to the sun in settling vessel, the upper clear supernate overflow is recycled; And the calcium carbide material-mud that will precipitate after thickening is handled is modulated into Ca (OH)
2Concentration 44 titres, through sampling detect qualified after, with the conveying of the pump continous-stable unslaked lime ashing operation in the production of solvay soda process soda ash, by calcium carbide mud: the unslaked lime weight ratio is that 3: 1 mixed are carried out ashing Processing of Preparation Ca (OH)
2The milk of lime of concentration 155 titres, after detecting, sampling adopt stable being transported in the milk of lime jar of pump to deposit synthetic milk of lime, ammonia recovery process in pump delivery is produced to solvay soda process soda ash in use, with the ammonium chloride reaction in the filtrated stock of elimination sodium bicarbonate, reclaim ammonia, be delivered to the magnesium ion reaction formation Mg (OH) in refined brine preparation process and the salt solution by evaporation
2Precipitation is removed Mg (OH) through the settling vessel separation
2Precipitation, to guarantee brine quality, the ammonia of recovery returns production system and uses.
Embodiment four
Calcium carbide mud precipitates thickening and handles after the sky discharging waste gas of exposing to the sun in settling vessel, the upper clear supernate overflow is recycled; And the calcium carbide material-mud that will precipitate after thickening is handled is modulated into Ca (OH)
2Concentration 34 titres, through sampling detect qualified after, with the conveying of the pump continous-stable unslaked lime ashing operation in the production of solvay soda process soda ash, by calcium carbide mud: the unslaked lime weight ratio is that 1.5: 1 mixed are carried out ashing Processing of Preparation Ca (OH)
2The milk of lime of concentration 160 titres, adopt stable being transported in the milk of lime jar of pump to deposit synthetic milk of lime after sampling detects, the ammonium chloride reaction in the filtrated stock of ammonia recovery process in pump delivery is produced to solvay soda process soda ash and elimination sodium bicarbonate is to reclaim ammonia in use; The magnesium ion reaction that synthetic milk of lime is delivered in refined brine preparation process and the salt solution forms Mg (OH)
2Precipitation is removed Mg (OH) through the settling vessel separation
2Precipitation.
Claims (5)
1, calcium carbide mud is used for the method that solvay soda process soda ash is produced, carry out the thickening processing after it is characterized in that adopting calcium carbide mud discharging waste gas, remove calcium carbide mud clear liquid, calcium carbide mud clear liquid is back to acetylene generating system, calcium carbide material-mud after the thickening processing is transported to solvay soda process soda ash production process, is deployed into Ca (OH)
2Concentration is the milk of lime of 155-165 titre, afterwards synthetic milk of lime is used in the ammonia recovery and salt refining of solvay soda process soda ash production.
2, calcium carbide mud as claimed in claim 1 is used for the method that solvay soda process soda ash is produced, and it is characterized in that: Ca (OH) in the calcium carbide mud after thickening is handled
2After concentration is adjusted into the 34-44 titre, prepare Ca (OH) with an amount of unslaked lime and water hybrid reaction
2Concentration is the milk of lime of 155-165 titre.
3, calcium carbide mud as claimed in claim 1 is used for the method that solvay soda process soda ash is produced, it is characterized in that: milk of lime is used for salt refining that solvay soda process soda ash produces for the magnesium ion reaction precipitation in salt refining operation and salt solution, to remove the magnesium ion in the salt solution.
4, calcium carbide mud as claimed in claim 1 is used for the method that solvay soda process soda ash is produced, it is characterized in that: synthetic milk of lime is applied to being recovered as in ammonia still process of ammonia, ammonium chloride reaction in the filtrated stock in producing with soda ash, the ammonia that heated volatile goes out reclaims.
5, be used for the method that solvay soda process soda ash is produced as claim 1,2,3 or 4 described calcium carbide mud, it is characterized in that: described calcium carbide mud is for adopting the calcium carbide slag cement that the calcium carbide reaction produces in the acetylene method production Production of PVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101139257A CN100567155C (en) | 2007-10-16 | 2007-10-16 | Calcium carbide mud is used for the method that solvay soda process soda ash is produced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101139257A CN100567155C (en) | 2007-10-16 | 2007-10-16 | Calcium carbide mud is used for the method that solvay soda process soda ash is produced |
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|---|---|
| CN101177286A CN101177286A (en) | 2008-05-14 |
| CN100567155C true CN100567155C (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556155B (en) * | 2014-12-25 | 2016-03-16 | 唐山三友化工股份有限公司 | Chlor-alkali tailing and ammonia alkali tailing is utilized to produce the method for soda ash |
| CN109574046A (en) * | 2019-01-09 | 2019-04-05 | 青海盐湖工业股份有限公司 | A method of soda ash is produced by raw material of a variety of by-products |
| CN111977993B (en) * | 2019-05-21 | 2022-04-12 | 江苏苏盐井神股份有限公司 | Device and method for performing desulfurization or ash melting on returned stone and returned sand pulping in soda production |
| CN113753923A (en) * | 2021-10-11 | 2021-12-07 | 浙江志澄环境资源科技有限公司 | Alkali making process for preparing ammonia gas and carbon dioxide by using carbide slag reaction for dual-cycle utilization |
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