CN1098817C - Method for removing chlorine ion in salt and alkali sludges - Google Patents
Method for removing chlorine ion in salt and alkali sludges Download PDFInfo
- Publication number
- CN1098817C CN1098817C CN 97121065 CN97121065A CN1098817C CN 1098817 C CN1098817 C CN 1098817C CN 97121065 CN97121065 CN 97121065 CN 97121065 A CN97121065 A CN 97121065A CN 1098817 C CN1098817 C CN 1098817C
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- China
- Prior art keywords
- alkali
- sludges
- salt
- urban sewage
- saline
- 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.)
- Expired - Fee Related
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- Treatment Of Sludge (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention relates to a method for removing chlorine ions from saline-alkaline sludge. A treating agent is mixed with saline-alkaline sludge, the mixture is stirred, and filtration is carried out after still sedimentation. The method is characterized in that the used treating agent is urban sewage. The weight proportion of the saline-alkaline sludge to the urban sewage ranges from 20:1000 to 80:1000, and the removing rate for the one-time treatment of chlorine ions ranges from 92 to 98%. The extremely effective method has the advantage of extremely low cost because equipment does not need to be added since the sludge can be treated by the original equipment for urban sewage treatment; in addition, the COD of the urban sewage as the treating agent is obviously decreased; and the removing rate for one-time treatment ranges from 60 to 80%.
Description
The present invention relates to a kind of treatment process of body refuse, particularly relate to a kind of method of removing chlorion in the body refuse.
Be white depositions with the saturated brine of ammonia alkali legal system alkali useless mud exquisite and that distillation produces, be referred to as white clay, this is a kind of salt and alkali sludges.China utilize every year chlor-alkali produce soda ash produce 500 approximately surplus ten thousand tons of salt and alkali sludges, enormous amount has caused serious pollution to environment.In decades, with salt and alkali sludges as renewable resource and consider its comprehensive utilization side and, all done a large amount of work both at home and abroad, but do not settled the matter once and for all yet so far.The processing of salt and alkali sludges has become restraining factors of China's basic industry development, as renewable resource, from the consideration that has a large capacity and a wide range, mainly be as material of construction, as brickmaking and cement, and be devoted to the research situation of brickmaking and cement, do not enter the application stage so far from decades.Tracing it to its cause mainly is the chlorion that has content higher in the salt and alkali sludges, under higher temperature conditions, easily produce the hydrogenchloride of corrosion pipeline and equipment, and the physical strength to brick and cement also makes a strong impact, the chlorion of high level also has a strong impact on its application on environment-friendly engineering in the salt and alkali sludges, as as shaped coal additive, steam coal incendiary sweetening agent and cigarette-gas desulfurizer etc., apply all bigger problems of existence.Therefore how removing chlorion in the salt and alkali sludges effectively just becomes gordian technique on industry such as being applied in building materials, chemical fertilizer and environmental protection and the engineering, also is the significant problem that can salt and alkali sludges effectively be administered.
At present, generally adopt seawater or fresh water to remove chlorion in the salt and alkali sludges, promptly allow salt and alkali sludges and water or sea water mixing, stir, the quiescent settling after-filtration just can be removed a part of chlorion, but the validity of these methods is poor, and water consumption is big, thereby processing costs is very high.
The purpose of this invention is to provide a kind of method of removing chlorion in the salt and alkali sludges with municipal effluent, it can remedy existing above-mentioned deficiency with seawater or fresh water treatment method.
The present invention removes the method for chlorion in the salt and alkali sludges, mixes with salt and alkali sludges with treatment agent, stirs, and the quiescent settling after-filtration is characterized in that used treatment agent is a municipal effluent.
Method of the present invention is very effective, uses the existing equipment of Treating Municipal Sewage just can handle body refuse, does not need increase equipment, so present method cost is extremely low.Help the further utilization of salt and alkali sludges.In addition, also obviously reduce as the COD of the municipal effluent of treatment agent itself, the clearance of primary treatment is 60～80%.
Below by embodiment the present invention is described.
Embodiment
Getting 1 liter of municipal effluent is composite waste (this waste water is taken from Qingdao Hai Bohe sewage work), be placed on and under stirring condition, add white alkali-making mud (wetting) 20 grams in the glass beaker, stirred 30 minutes, the standing sedimentation after-filtration, measure the chloride ion content that filters in the white clay of back, with compare without chloride ion content in the white clay of sewage disposal, obtain its clearance, to add white clay quantity and change 40 into, 60 and 80 grams, through test of many times and mensuration, the clearance of chlorion primary treatment all can reach 92～98% in the white clay, and the content of chlorion can be reduced to 1～5 ‰ in the white clay (wetting), and this just meets multi-purpose the requirement fully.
Claims (2)
1. a method of removing chlorion in the salt and alkali sludges is mixed with salt and alkali sludges with treatment agent, stirs, and the quiescent settling after-filtration is characterized in that used treatment agent is a municipal effluent.
2. the method for claim 1 is characterized in that the weight of described salt and alkali sludges and municipal effluent part by weight are 20～80: 1000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97121065 CN1098817C (en) | 1997-12-11 | 1997-12-11 | Method for removing chlorine ion in salt and alkali sludges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97121065 CN1098817C (en) | 1997-12-11 | 1997-12-11 | Method for removing chlorine ion in salt and alkali sludges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1219512A CN1219512A (en) | 1999-06-16 |
| CN1098817C true CN1098817C (en) | 2003-01-15 |
Family
ID=5176183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97121065 Expired - Fee Related CN1098817C (en) | 1997-12-11 | 1997-12-11 | Method for removing chlorine ion in salt and alkali sludges |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1098817C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557364B (en) * | 2011-12-30 | 2013-06-12 | 青岛碱业股份有限公司 | Method for reducing chloride ions in white mud of ammonia-alkali factory |
| CN112845534B (en) * | 2021-01-27 | 2022-09-06 | 江西晶昊盐化有限公司 | Method for treating waste residue liquid of soda ash |
-
1997
- 1997-12-11 CN CN 97121065 patent/CN1098817C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1219512A (en) | 1999-06-16 |
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| 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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |