CN101353159A - Sodium sulfide solution purification process - Google Patents
Sodium sulfide solution purification process Download PDFInfo
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- CN101353159A CN101353159A CNA200710137878XA CN200710137878A CN101353159A CN 101353159 A CN101353159 A CN 101353159A CN A200710137878X A CNA200710137878X A CN A200710137878XA CN 200710137878 A CN200710137878 A CN 200710137878A CN 101353159 A CN101353159 A CN 101353159A
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- thermosol
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- sodium sulphide
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- Filtration Of Liquid (AREA)
Abstract
The invention relates to an alkali liquor purification process method in a sodium sulphide production course. The alkali liquor purification process method comprises a thermal dissolution process, a centrifugal settlement and separation process, a filtration process. By adopting the alkali liquor purification process of the invention, equipment can be simplified, in particular, continuous and uninterrupted operation can be realized; the working efficiency is greatly improved, in particular, the product quality is greatly improved; meanwhile, residual alkali in sludge can be fully washed and recovered; the process is shortened, and quantitative automatic switch control can be realized easily on schedule; and the situations of leaking and polluting environment can be reduced.
Description
Technical field:
Solution purification process method when the present invention relates to a kind of Sodium Sulphide production process.
Background technology:
In Sodium Sulphide (Na2S) production process, the grog after the calcining directly enters the thermalization jar and carries out thermosol, and gained solution is the bigger suspension of impure amount behind thermosol, needs can evaporate after purifying.The technological process for purifying of alkali lye has two kinds in the Sodium Sulphide production process at present: the one, adopt the settling vessel natural subsidence, shortcoming be to prevent alkali lye viscosity change to need insulation and heat, settling velocity is slow, processing power is little, the equipment construction investment greatly, seriously corroded to equipment influences quality product.The 2nd, adopt plate-and-frame filter press to filter, shortcoming is that pressure filter needs artificial continually slag dumping, can only intermittent operation, hand labor intensity is big, efficient is low, run emit leak serious, contaminate environment and product.
Summary of the invention:
The purpose of this invention is to provide a kind of continuously-running and increase substantially the investment of working efficiency, cost low, the sodium sulfide solution purification process that can improve the quality of products especially.
The technical solution used in the present invention is to comprise following technological process:
Thermosol operation: the Sodium Sulphide solid grog of processing to be processed is added 2.1～2.3 weight parts waters by 1 weight part raw material, under 70～90 ℃ of temperature, carry out thermosol, stirred during thermosol 20～40 minutes, and stirring velocity 20-40 rev/min, got Sodium Sulphide solid grog suspension;
Above-mentioned thermosol temperature the best is 75～85 ℃.
Centrifugal settling separates: will state the Sodium Sulphide suspension that the thermosol gained contains body refuse, and send into spiral discharge sedimentation centrifuge with the slag stock pump and carry out centrifugal rapid subsidence with rotating speed 2000-3000 rev/min, and get clear liquor sulfuration alkali lye; The solid content of its Sodium Sulphide clear liquor of getting is preferably lower than 5%.
Filter: the separating obtained clear liquor of centrifugal settling is sent into 8～15 microns plate-and-frame filter press in filter cloth aperture filter down for 75～85 ℃, get, the gained sodium sulfide solution is sent into evaporization process get final product through liquid in pressure 〉=0.5MP, temperature.
As preferred scheme, the best loopback of body refuse after the sedimentation of above-mentioned centrifugal settling separation circuit is gone into the washery slag storage tank and is added the clear water washing of 2.5-3 times of weight, gained suspension is sent into spiral discharge sedimentation centrifuge again carry out the secondary centrifuging sedimentation, the clarifying weak lye of gained is as the thermosol water of thermosol operation.
Adopt technology of the present invention can make simplified equipment, especially can realize operation uninterruptedly, operating efficiency greatly improves, particularly quality product is able to bigger raising, residual alkali can obtain the thorough washing recovery in the body refuse simultaneously, technical process is shortened, and easy realization automatic switchover control at regular time and quantity, runs and emits the situation of leakage and contaminate environment also can improve.
Embodiment:
Embodiment 1:
The Sodium Sulphide solid grog of processing to be processed is added 2.2 weight parts waters by 1 weight part raw material, under 75 ℃ of temperature, carries out thermosol, stirred during thermosol 30 minutes, 20 rev/mins of stirring velocitys, Sodium Sulphide solid grog suspension;
To state the Sodium Sulphide suspension that the thermosol gained contains body refuse, send into spiral discharge sedimentation centrifuge with the slag stock pump and carry out centrifugal rapid subsidence for 2000 rev/mins with rotating speed, get clear liquor sulfuration alkali lye, the solid content of its Sodium Sulphide (Na2S) clear liquor is lower than 5%;
The separating obtained clear liquor of centrifugal settling is sent into the 8 microns plate-and-frame filter press in filter cloth aperture filter down for 80 ℃, get and send into evaporization process through liquid and get final product at pressure 0.6MP, temperature.
Embodiment 2:
The Sodium Sulphide solid grog of processing to be processed is added 2.3 weight parts waters by 1 weight part raw material, under 85 ℃ of temperature, carries out thermosol, stirred during thermosol 35 minutes, 40 rev/mins of stirring velocitys, Sodium Sulphide solid grog suspension;
To state the Sodium Sulphide suspension that the thermosol gained contains body refuse, send into spiral discharge sedimentation centrifuge with the slag stock pump and carry out centrifugal rapid subsidence for 2500 rev/mins with rotating speed, get clear liquor sulfuration alkali lye, the solid content of its Sodium Sulphide (Na2S) clear liquor is lower than 5%; Body refuse after the sedimentation is transmitted back to the washery slag storage tank and adds the clear water washing of 2.3 times of weight, gained suspension is sent into spiral discharge sedimentation centrifuge again carry out the secondary centrifuging sedimentation, the clarifying weak lye of gained is as the thermosol water of next round thermosol operation;
The separating obtained preparatory group of centrifugal settling 1 road clear liquor is sent into the 10 microns plate-and-frame filter press in filter cloth aperture filter down for 85 ℃, get and send into evaporization process through liquid and get final product at pressure 0.6MP, temperature.
Embodiment 3:
The Sodium Sulphide solid grog of processing to be processed is added 2.15 weight parts waters by 1 weight part raw material, under 80 ℃ of temperature, carries out thermosol, stirred during thermosol 25 minutes, 30 rev/mins of stirring velocitys, Sodium Sulphide solid grog suspension;
The Sodium Sulphide suspension that the thermosol gained contains body refuse will be stated, send into spiral discharge sedimentation centrifuge with the slag stock pump and carry out centrifugal rapid subsidence for 2800 rev/mins with rotating speed, get clear liquor sulfuration alkali lye, body refuse after the sedimentation is transmitted back to the washery slag storage tank and adds the clear water washing of 2.5 times of weight, gained suspension is sent into spiral discharge sedimentation centrifuge again carry out the secondary centrifuging sedimentation, the clarifying weak lye of gained is as the thermosol water of next round thermosol operation;
Separating obtained the 1st road clear liquor of centrifugal settling is sent into the 12 microns plate-and-frame filter press in filter cloth aperture filter down for 75 ℃, get and send into evaporization process through liquid and get final product at pressure 0.5MP, temperature.
Embodiment 5:
The Sodium Sulphide solid grog of processing to be processed is added 2.25 weight parts waters by 1 weight part raw material, under 70 ℃ of temperature, carries out thermosol, stirred during thermosol 40 minutes, 40 rev/mins of stirring velocitys, Sodium Sulphide solid grog suspension;
The Sodium Sulphide suspension that the thermosol gained contains body refuse will be stated, send into spiral discharge sedimentation centrifuge with the slag stock pump and carry out centrifugal rapid subsidence for 3000 rev/mins with rotating speed, get clear liquor sulfuration alkali lye, body refuse after the sedimentation is transmitted back to the washery slag storage tank and adds the clear water washing of 2.3 times of weight, gained suspension is sent into spiral discharge sedimentation centrifuge again carry out the secondary centrifuging sedimentation, the clarifying weak lye of gained is as the thermosol water of next round thermosol operation;
Separating obtained the 1st road clear liquor of centrifugal settling is sent into the 15 microns plate-and-frame filter press in filter cloth aperture filter down for 75 ℃, get and send into evaporization process through liquid and get final product at pressure 0.5MP, temperature.
Embodiment 6:
The Sodium Sulphide solid grog of processing to be processed is added 2.2 weight parts waters by 1 weight part raw material, under 90 ℃ of temperature, carries out thermosol, stirred during thermosol 20 minutes, 40 rev/mins of stirring velocitys, Sodium Sulphide solid grog suspension;
The Sodium Sulphide suspension that the thermosol gained contains body refuse will be stated, send into spiral discharge sedimentation centrifuge with the slag stock pump and carry out centrifugal rapid subsidence for 2200 rev/mins with rotating speed, get clear liquor sulfuration alkali lye, body refuse after the sedimentation is transmitted back to the washery slag storage tank and adds the clear water washing of 2.4 times of weight, gained suspension is sent into spiral discharge sedimentation centrifuge again carry out the secondary centrifuging sedimentation, the clarifying weak lye of gained is as the thermosol water of next round thermosol operation;
Separating obtained the 1st road clear liquor of centrifugal settling is sent into the 12 microns plate-and-frame filter press in filter cloth aperture filter down for 80 ℃, get and send into evaporization process through liquid and get final product at pressure 0.7MP, temperature.
Claims (3)
1, a kind of sodium sulfide solution purification process is characterized in that comprising following technological process:
Thermosol operation: the Sodium Sulphide solid grog of processing to be processed is added 2.1～2.3 weight parts waters by 1 weight part raw material, under 70～85 ℃ of temperature, carry out thermosol, stirred during thermosol 20～40 minutes, and stirring velocity 20-40 rev/min, got Sodium Sulphide solid grog suspension;
Centrifugal settling separates: will state the Sodium Sulphide suspension that the thermosol gained contains body refuse, and send into spiral discharge sedimentation centrifuge with the slag stock pump and carry out centrifugal rapid subsidence with rotating speed 2000-3000 rev/min, and get clear liquor sulfuration alkali lye;
Filter: the separating obtained clear liquor of centrifugal settling is sent into 8～15 microns plate-and-frame filter press in filter cloth aperture filter down for 75～85 ℃ in pressure 〉=0.5MP, temperature, get and see through liquid and get final product, plate-and-frame filter press filtering on a small quantity carefully body refuse continuously flow into the washery slag jar from sheet frame filter plate bottom.
2, sodium sulfide solution purification process as claimed in claim 1 is characterized in that described thermosol temperature is 75～85 ℃.
3, as claim 1 or 2 described sodium sulfide solution purification process, it is characterized in that body refuse loopback after the sedimentation of described centrifugal settling separation circuit goes into the washery slag storage tank and add the clear water washing of 2.5～3 times of weight, gained suspension is sent into spiral discharge sedimentation centrifuge again carry out the secondary centrifuging sedimentation, the clarifying weak lye of gained is as the thermosol water of thermosol operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710137878XA CN101353159B (en) | 2007-07-24 | 2007-07-24 | Sodium sulfide solution purification process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710137878XA CN101353159B (en) | 2007-07-24 | 2007-07-24 | Sodium sulfide solution purification process |
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| CN101353159A true CN101353159A (en) | 2009-01-28 |
| CN101353159B CN101353159B (en) | 2011-07-13 |
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| CN200710137878XA Expired - Fee Related CN101353159B (en) | 2007-07-24 | 2007-07-24 | Sodium sulfide solution purification process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838073B (en) * | 2009-03-20 | 2012-10-10 | 宝山钢铁股份有限公司 | Silicon steel alkali rinse purification method and device |
| CN106185837A (en) * | 2016-08-17 | 2016-12-07 | 阿克塞县泰戈化工发展有限公司 | Mud system is washed in a kind of clarification |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033156C (en) * | 1992-12-06 | 1996-10-30 | 新疆天山化工厂 | Process for purifying of sodium sulfide |
| CN1436719A (en) * | 2002-02-06 | 2003-08-20 | 内蒙古利川化工有限责任公司 | Prepn process of sodium sulfide crystal |
-
2007
- 2007-07-24 CN CN200710137878XA patent/CN101353159B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838073B (en) * | 2009-03-20 | 2012-10-10 | 宝山钢铁股份有限公司 | Silicon steel alkali rinse purification method and device |
| CN106185837A (en) * | 2016-08-17 | 2016-12-07 | 阿克塞县泰戈化工发展有限公司 | Mud system is washed in a kind of clarification |
| CN106185837B (en) * | 2016-08-17 | 2018-05-04 | 阿克塞县泰戈化工发展有限公司 | Mud system is washed in one kind clarification |
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| Publication number | Publication date |
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| CN101353159B (en) | 2011-07-13 |
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Owner name: JIN XIANQIN Free format text: FORMER OWNER: JINGHE COUNTY ZHONGXIN CHEMICAL TECHNOLOGY CO., LTD. Effective date: 20090612 |
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