CN102020369A - Desulfuration waste water treatment process - Google Patents
Desulfuration waste water treatment process Download PDFInfo
- Publication number
- CN102020369A CN102020369A CN 201010548211 CN201010548211A CN102020369A CN 102020369 A CN102020369 A CN 102020369A CN 201010548211 CN201010548211 CN 201010548211 CN 201010548211 A CN201010548211 A CN 201010548211A CN 102020369 A CN102020369 A CN 102020369A
- Authority
- CN
- China
- Prior art keywords
- waste water
- desulfuration
- treatment process
- desulfurization
- double salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a desulfuration waste water treatment process which comprises the following the steps of: firstly leading waste water to be desulfurated into a decoloration device, adding active carbon for absorbing decoloration, and then filtering by a filtering device; carrying out negative pressure concentration on the waste water subjected to absorbing decoloration and filtering through a double effect evaporimeter device so as to ensure that the density of the waste water is 1.25-1.30 times that of water; and finally cooling the concentrated waste water to 35-50 DEG C in a crystallization separator for crystal-liquid separation, wherein the discharged waste liquid can be recycled; and drying crystals into sulfur containing double salt in a dryer. The desulfuration waste water treatment process can effectively reduce the double salt content of desulfuration liquid in a desulfuration system, treat the desulfuration waste water of the desulfuration system and improve desulfuration efficiency; moreover, the recycled double salt products have certain economic benefit.
Description
Technical field
The present invention relates to a kind of treatment process that is used to handle desulfurization wastewater, specifically is in coke making process, from ammonia NH
3Be alkali source, in the waste water that the air catalytic oxidation desulfurization and decyanation technology produces, reclaim the technology of sulfur-bearing double salt.
Background technology
With NH
3In the coke oven gas desulfurization process for alkali source, the (hydrogen sulfide (H of the sulfide in the coke-oven gas
2S) and prussic acid (HCN) etc.) most of in sweetening process, removed clean, thereby doctor solution can recycle.But in doctor solution enrichment a small amount of sulfur-bearing double salt (abbreviation double salt), be ammonium sulfate ((NH
4)
2SO
4), ammonium thiocyanate (NH
4SCN) and ammonium thiosulfate ((NH
4)
2S
2O
3).These double salt are in doctor solution recycle process, and constantly accumulation after concentration runs up to finite concentration (generally being more than the 250g/L), with reducing the activity of doctor solution, influences molecular balance, thereby causes the continuous decline of desulfuration efficiency.Therefore must control the concentration of double salt in the doctor solution, normally carry out so that produce.The waste water of extension high density extracts double salt from doctor solution, can reduce double salt concentration in the doctor solution on the one hand, can extract the double salt product on the other hand, creates certain economic benefits, and has bigger environmental benefit.
Summary of the invention
The technical problem to be solved in the present invention is at the deficiency of coke oven gas desulfurization method of wastewater treatment in the existing coking industry, provides a kind of desulfurization wastewater treatment process, to improve desulfuration efficiency.
For solving the problems of the technologies described above, the present invention includes following steps:
A, waste water to be desulfurization is introduced the decolouring device, add after the charcoal absorption decolouring handles, device filters after filtration;
B, the waste water with above-mentioned adsorption bleaching, after filtering concentrate through double-effect evaporation apparatus negative pressure, make the density of waste water reach 1.25-1.30 times of density of water;
C, the waste water after will concentrating are cooled to 35 ℃-50 ℃ in the Crystallization Separation device, carry out brilliant liquid and separate, and the waste liquid recycle of discharge becomes sulfur-bearing double salt with crystal after the drying in drying machine.
In the described A step, the add-on of gac is pressed gac/waste water=5-10kg/m to be desulfurization
3Ratio add.
In the described B step, the double-effect evaporation apparatus comprises that 1st effective evaporator, is imitated separator and 2nd effect evaporator, two is imitated separator, and one imitates vaporization temperature between 85-100 ℃, and pressure is 0.08Mpa-0.097Mpa, two imitate vaporization temperature between 75-90 ℃, and pressure is 0.06Mpa-0.088Mpa.
Compared with prior art, the invention has the beneficial effects as follows:
1, product purity height: in process of production, do not add any other additive or catalyzer, guarantee product purity, and manufacturing procedure is few, can fast the double salt in the desulfurization waste liquor be extracted, and becomes the purity high product.
2 environmental protection: technology utilization desulfurization waste liquor of the present invention extracts sulfur-bearing double salt, no raw materials cost.Steam condensate behind the extraction product, the waste water that doctor solution steams etc. return the utilization of original system recirculation, do not produce any three wastes, belong to environmental protection technology.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
As shown in Figure 1, a kind of treatment process that is used to handle coke-oven plant's desulfurization wastewater mainly comprises: bleaching process, filtration operation, evaporation separation circuit, Crystallization Separation operation and drying process.Concrete processing step is: at first waste water to be desulfurization is introduced the decolouring device, carried out adsorption bleaching at decolouring device adding gac and handle, the add-on of gac is pressed gac/waste water=5-10kg/m to be desulfurization
3Ratio add, bleaching time is 4-6 hour, device filters after filtration, the coloring matter in the waste water to be desulfurization, solid impurity adsorbing and removing is gone out, with the range estimation inclusion-free and present transparent color and be as the criterion.Again with above-mentioned adsorption bleaching, waste water after the filtration concentrates through double-effect evaporation apparatus negative pressure, the double-effect evaporation apparatus comprises 1st effective evaporator, one imitates separator and 2nd effect evaporator, two imitate separator, 1st effective evaporator and 2nd effect evaporator adopt falling-film evaporator that desulfurization wastewater is carried out evaporation concentration, material distributes balanced especially, the 1st effective evaporator vaporization temperature is between 85-100 ℃, pressure is 0.08Mpa-0.097Mpa, the 2nd effect evaporator vaporization temperature is between 75-90 ℃, pressure is 0.06Mpa-0.088Mpa, the vaporization temperature of 1st effective evaporator and 2nd effect evaporator is to make full use of the temperature of outer confession between 120 ℃-140 ℃, pressure is between the steam thermal energy of 4-6MPa, waste water to be desulfurization is concentrated fully, imitate separator and the two effect corresponding temperature of separator and pressure to one and do not do control, and the density that makes waste water reaches 1.25-1.30 times of density of water, evaporation time is 7-9 hour, prevent that the double salt product from decomposing variation, wherein, an effect evaporation time is 3-4 hour, one effect evaporation time is 4-5 hour.Waste water after will concentrating at last is cooled to 35 ℃-50 ℃ in the Crystallization Separation device, carrying out brilliant liquid separates, the waste liquid recycle of discharging, crystal is become sulfur-bearing double salt after the drying in drying machine, waste water after concentrating enters the temperature of Crystallization Separation device about 90-95 ℃, after 23-30 ℃ of water coolant exterior cooling, make the waste water after concentrating in the Crystallization Separation device, be cooled to 35 ℃-50 ℃.Waste liquid to discharging both can be used as the utilization of doctor solution recirculation, also can sneak into waste water circulation previous process steps to be desulfurization, thereby extracted sulfur-bearing double salt.The structures that aforesaid decolouring device, filtration unit, 1st effective evaporator, are imitated separator, 2nd effect evaporator, two effect separator, Crystallization Separation device and drying machines all adopt known configurations.
Claims (3)
1. desulfurization wastewater treatment process is characterized in that may further comprise the steps:
A, waste water to be desulfurization is introduced the decolouring device, add after the charcoal absorption decolouring handles, device filters after filtration;
B, the waste water with above-mentioned adsorption bleaching, after filtering concentrate through double-effect evaporation apparatus negative pressure, make the density of waste water reach 1.25-1.30 times of density of water;
C, the waste water after will concentrating are cooled to 35 ℃-50 ℃ in the Crystallization Separation device, carry out brilliant liquid and separate, and the waste liquid recycle of discharge becomes sulfur-bearing double salt with crystal after the drying in drying machine.
2. desulfurization wastewater treatment process according to claim 1 is characterized in that in the described A step, the add-on of gac is pressed gac/waste water=5-10kg/m to be desulfurization
3Ratio add.
3. desulfurization wastewater treatment process according to claim 1, it is characterized in that in the described B step, the double-effect evaporation apparatus comprises that 1st effective evaporator, is imitated separator and 2nd effect evaporator, two is imitated separator, one imitates vaporization temperature between 85-100 ℃, pressure is 0.08Mpa-0.097Mpa, two imitate vaporization temperature between 75-90 ℃, and pressure is 0.06Mpa-0.088Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105482110A CN102020369B (en) | 2010-11-18 | 2010-11-18 | Desulfuration waste water treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105482110A CN102020369B (en) | 2010-11-18 | 2010-11-18 | Desulfuration waste water treatment process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102020369A true CN102020369A (en) | 2011-04-20 |
| CN102020369B CN102020369B (en) | 2012-06-27 |
Family
ID=43862198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105482110A Active CN102020369B (en) | 2010-11-18 | 2010-11-18 | Desulfuration waste water treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102020369B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276098A (en) * | 2011-06-24 | 2011-12-14 | 吉林华海环境工程有限公司 | Treatment equipment and treatment method of coal gas desulfurization liquid |
| CN102351220A (en) * | 2011-07-08 | 2012-02-15 | 无锡市霄鹰环境科技有限公司 | System and technology for recovering sodium nitrate from tin-containing waste liquid treatment tail water |
| CN102701510A (en) * | 2012-06-28 | 2012-10-03 | 镇江市三环环保技术咨询服务有限公司 | Alkali-added wet type oxidation catalytic desulfurization waste solution recycling method |
| CN102951742A (en) * | 2011-08-17 | 2013-03-06 | 陈昆先 | Method for extracting salts from tannin extract coking desulfurization waste liquor |
| CN104016382A (en) * | 2014-06-27 | 2014-09-03 | 尚兰华 | Method for producing sodium sulfite by desulfurizing flue gas by double-alkali process |
| CN104478152A (en) * | 2014-12-29 | 2015-04-01 | 丹东东方机电工程有限公司 | Sodium-salt-containing waste water treatment device of desulfurization system |
| CN107651804A (en) * | 2017-11-15 | 2018-02-02 | 昌邑市瑞海生物科技有限公司 | A kind of highly concentrated high salt wastewater from chemical industry prepares the recycling processing method and device of Nacl |
| CN107857416A (en) * | 2017-12-13 | 2018-03-30 | 北京能为科技股份有限公司 | On Line Foul Removing Technology handles the concentration systems and its technique of desulfurization wastewater |
| CN110668517A (en) * | 2019-09-23 | 2020-01-10 | 励福(江门)环保科技股份有限公司 | Novel evaporative crystallization concentration treatment method for high-salinity wastewater |
| CN110803731A (en) * | 2019-10-22 | 2020-02-18 | 中国石油化工集团有限公司 | Method and system for extracting secondary salt in high-sulfur-capacity complex iron desulfurization solution |
| CN112591969A (en) * | 2020-11-06 | 2021-04-02 | 鞍钢集团工程技术有限公司 | High-efficiency energy-saving desulfurization liquid salt extraction process and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125644A (en) * | 2007-08-09 | 2008-02-20 | 上海泽因工程设计有限公司 | Production technique for reclaiming ammonium thiosulfate and ammonium thiocyanate from desulfurization waste liquor |
| CN101746874A (en) * | 2010-02-04 | 2010-06-23 | 武汉中新化工有限公司 | Processing method of wastewater desulfurized by fume wet method |
-
2010
- 2010-11-18 CN CN2010105482110A patent/CN102020369B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125644A (en) * | 2007-08-09 | 2008-02-20 | 上海泽因工程设计有限公司 | Production technique for reclaiming ammonium thiosulfate and ammonium thiocyanate from desulfurization waste liquor |
| CN101746874A (en) * | 2010-02-04 | 2010-06-23 | 武汉中新化工有限公司 | Processing method of wastewater desulfurized by fume wet method |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276098A (en) * | 2011-06-24 | 2011-12-14 | 吉林华海环境工程有限公司 | Treatment equipment and treatment method of coal gas desulfurization liquid |
| CN102351220A (en) * | 2011-07-08 | 2012-02-15 | 无锡市霄鹰环境科技有限公司 | System and technology for recovering sodium nitrate from tin-containing waste liquid treatment tail water |
| CN102351220B (en) * | 2011-07-08 | 2013-07-17 | 无锡市霄鹰环境科技有限公司 | System and technology for recovering sodium nitrate from tin-containing waste liquid treatment tail water |
| CN102951742A (en) * | 2011-08-17 | 2013-03-06 | 陈昆先 | Method for extracting salts from tannin extract coking desulfurization waste liquor |
| CN102701510A (en) * | 2012-06-28 | 2012-10-03 | 镇江市三环环保技术咨询服务有限公司 | Alkali-added wet type oxidation catalytic desulfurization waste solution recycling method |
| CN104016382A (en) * | 2014-06-27 | 2014-09-03 | 尚兰华 | Method for producing sodium sulfite by desulfurizing flue gas by double-alkali process |
| CN104478152A (en) * | 2014-12-29 | 2015-04-01 | 丹东东方机电工程有限公司 | Sodium-salt-containing waste water treatment device of desulfurization system |
| CN104478152B (en) * | 2014-12-29 | 2016-04-27 | 丹东东方机电工程有限公司 | Desulphurization system is containing sodium salt wastewater treatment equipment |
| CN107651804A (en) * | 2017-11-15 | 2018-02-02 | 昌邑市瑞海生物科技有限公司 | A kind of highly concentrated high salt wastewater from chemical industry prepares the recycling processing method and device of Nacl |
| CN107857416A (en) * | 2017-12-13 | 2018-03-30 | 北京能为科技股份有限公司 | On Line Foul Removing Technology handles the concentration systems and its technique of desulfurization wastewater |
| CN110668517A (en) * | 2019-09-23 | 2020-01-10 | 励福(江门)环保科技股份有限公司 | Novel evaporative crystallization concentration treatment method for high-salinity wastewater |
| CN110803731A (en) * | 2019-10-22 | 2020-02-18 | 中国石油化工集团有限公司 | Method and system for extracting secondary salt in high-sulfur-capacity complex iron desulfurization solution |
| CN112591969A (en) * | 2020-11-06 | 2021-04-02 | 鞍钢集团工程技术有限公司 | High-efficiency energy-saving desulfurization liquid salt extraction process and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102020369B (en) | 2012-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102020369B (en) | Desulfuration waste water treatment process | |
| CN105036438B (en) | A kind of sodium alkali desulfurization waste liquid method for innocent treatment | |
| CN102674398B (en) | Method for recovering ammonium sulfate and ammonium thiocyanate from desulfuration waste liquor | |
| CN105600990B (en) | Method for recycling sulfur, ammonium sulfate and catalyst by utilizing coke oven gas desulfurization and decyanation waste liquid | |
| CN102259894A (en) | Comprehensive recovery process of secondary salts from coking plant desulfurization waste liquid | |
| CN102161541A (en) | Method for extracting salt from coking desulphurization waste solution and special device thereof | |
| AU2013257463B2 (en) | A method of recovering sulfur dioxide and heavy metals from metallurgical flue gas | |
| CN103274367A (en) | Method for extracting two secondary salts from desulfurized salt-containing waste liquid of coke oven gas | |
| CN103264991B (en) | Method for processing sulfur paste as coke oven gas desulfuration by-product | |
| CN112125319A (en) | Process for recovering all components of desulfurization waste liquid | |
| CN103288286A (en) | Catalytic oxidation treatment method for desulfurized waste liquid | |
| CN105505480A (en) | Desulfurization purification system applicable to coke oven gas | |
| CN103601219A (en) | Method for extracting sodium carbonate and sodium thiocyanate from sodium alkali desulfurization liquid waste by using causticization-acidification method | |
| CN105441140A (en) | Coke oven gas purifying system | |
| CN110252090B (en) | Method for improving absorption capacity and utilization rate of sodium sulfite desulfurization process by using triethanolamine | |
| CN104724778A (en) | Method for salt extraction from desulfurization waste solution through multi-effect evaporation | |
| CN103305286B (en) | Coke oven gas purifying system for efficiently recycling coking plant heat source and desulfurated liquid waste treatment method | |
| CN106746100B (en) | Treatment method of ethylene refining waste alkali liquor | |
| CN111760457A (en) | Method and equipment for regenerating waste salt generated in flue gas desulfurization | |
| CN103818883A (en) | Step-by-step separation system and method for extracting salts from coking HPF desulfurizing solution by aqueous phase method | |
| CN103588340A (en) | Method for treating sodium-alkali desulfurization waste liquid by causticization-acidification method | |
| CN106082535A (en) | The processing method of inorganic salt resource in a kind of ammonia process of desulfurization waste liquid | |
| CN103373734B (en) | Method for preparing high-quality potassium rhodanide by using coke oven gas waste liquor with sulfur and cyanogen removed | |
| CN105542873A (en) | A purification process system for coke oven gas | |
| CN105000738A (en) | Method for reducing content of salt in desulfurization waste liquor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 262404 Zhu Liu Street office in Changle County, Weifang, Shandong Patentee after: Weifang Zhenxing Coking Co.,Ltd. Address before: 262404 Zhu Liu street, Changle County, Weifang City, Shandong Province, No. 1 Patentee before: SHANDONG WEIJIAO GROUP Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180112 Address after: 277099 Linquan Road, Xuecheng District, Zaozhuang, Shandong Province, No. 68 Patentee after: SHANDONG WEIJIAO HOLDINGS GROUP XUECHENG ENERGY CO.,LTD. Address before: 262404 Zhu Liu Street office in Changle County, Weifang, Shandong Patentee before: Weifang Zhenxing Coking Co.,Ltd. |
|
| TR01 | Transfer of patent right |