CN1123537C - Plate-frame filtering technology for purifying turbid solution of natural soda - Google Patents
Plate-frame filtering technology for purifying turbid solution of natural soda Download PDFInfo
- Publication number
- CN1123537C CN1123537C CN 99105323 CN99105323A CN1123537C CN 1123537 C CN1123537 C CN 1123537C CN 99105323 CN99105323 CN 99105323 CN 99105323 A CN99105323 A CN 99105323A CN 1123537 C CN1123537 C CN 1123537C
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- plate
- alkali solution
- frame
- clear
- alkali
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- Expired - Fee Related
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Filtration Of Liquid (AREA)
Abstract
The present invention relates to a plate and frame filtering technology for purifying the turbid alkali solution of natural trona, which belongs to the field of chemical industry. In the technology, alkali solution in which a lime filter aid is added is filled in a turbid alkali storage barrel; then, the alkali solution in which a lime filter aid is pressed into a plate and frame filter press to be filtered through a plate and frame liquid supply pump; clear solution after filtration is delivered into a clarifying barrel to be clarified for the second time; overflowed liquid flows into a clear alkali solution barrel and is delivered to workshops to be used. The technology decreases wasted resources, reduces pollution, reduces occupied area, and improves production efficiency. Alkali solution which is refined by the technology is mainly used for providing qualified clear alkali solution for producing sodium carbonate, sodium bicarbonate and anhydrous sodium sulphate.
Description
The present invention is a kind of plate-frame filtering technology for purifying turbid solution of natural soda, belongs to chemical field.
In the alkali lye treating process, adopted the Large Scale and Continuous settling tank in the past, clarification mud directly is discharged in the sewage lagoon, because of its compressibility poor, be entrained with a large amount of high alkali liquids therebetween, not only the alkali lye loss and waste is serious, and sewage lagoon is also for want of planned and caused in various degree pollution.In addition, the settling tank floor space is bigger, and production efficiency is low.
For in refining alkali lye process, reduce to take up an area of, reduce and pollute, enhance productivity, spy of the present invention has proposed a kind of plate-frame filtering technology for purifying turbid solution of natural soda.
Plate-frame filtering technology for purifying turbid solution of natural soda of the present invention, it is muddy alkali lye adding lime flocculating aids with the choline operation, send into muddy alkali lye storage bucket, then, liquid pump is pressed into the plate-and-frame filter press filtration on sheet frame, clear liquid after the filtration is sent into settling tank and is carried out post-defecation, and overflowing liquid flows into the clear alkali liquor bucket, and is sent to the workshop use; The weight percent that adds the lime flocculating aids is 2～3%; Temperature in the plate-and-frame filter press is controlled between 95～100 ℃, and filter cake thickness is no more than 30 millimeters, and filter pressure is less than 1.2mpa.
Adopt plate-frame filtering technology for purifying turbid solution of natural soda of the present invention, muddy alkali lye is filtered by plate-and-frame filter press, reduced alkalinity wherein widely, reduced the waste of resource, the water content of filter cake is generally less than 35%, and compressibility is good, has reduced the pollution to environment.Use plate-and-frame filter press, can save some settling tanks, reduced floor space, improved production efficiency.Be mainly production soda ash workshop, sodium bicarbonate workshop and Sodium sulfate anhydrous.min(99) workshop through present technique purified alkali lye qualified clear alkali liquor is provided.
Embodiment:
Be to put into muddy alkali storage bucket from the muddy alkali lye of choline operation, then, liquid pump is pressed into the plate-and-frame filter press filtration on sheet frame, and the clear liquid after the filtration is sent into settling tank and carried out post-defecation, and overflowing liquid flows into the clear alkali liquor bucket, and is sent to the workshop use; Temperature in the plate-and-frame filter press is controlled between 95～100 ℃, and filter cake thickness is no more than 30 millimeters, and filter pressure is less than 1.2mpa, 1226 square metres/platform of filtration area, and throughput is 200 cubic metres/hour.
Claims (1)
1, a kind of Plate Filtration purifying turbid solution of natural soda method, it is to put into muddy alkali storage bucket from the muddy alkali lye of choline operation and to add the lime flocculating aids, it is characterized in that this alkali lye liquid pump on sheet frame is pressed into plate-and-frame filter press and filters, clear liquid after the filtration is sent into settling tank and is carried out post-defecation, overflowing liquid flows into the clear alkali liquor bucket, and is sent to the workshop use; In its process, the temperature in the plate-and-frame filter press is between 95-100 ℃, and filter cake thickness is no more than 30 millimeters, and filter pressure is less than 1.2mpa; Lime flocculating aids add-on is 2-3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99105323 CN1123537C (en) | 1999-04-19 | 1999-04-19 | Plate-frame filtering technology for purifying turbid solution of natural soda |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99105323 CN1123537C (en) | 1999-04-19 | 1999-04-19 | Plate-frame filtering technology for purifying turbid solution of natural soda |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1270922A CN1270922A (en) | 2000-10-25 |
| CN1123537C true CN1123537C (en) | 2003-10-08 |
Family
ID=5271958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99105323 Expired - Fee Related CN1123537C (en) | 1999-04-19 | 1999-04-19 | Plate-frame filtering technology for purifying turbid solution of natural soda |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1123537C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298637C (en) * | 2005-08-08 | 2007-02-07 | 南京工业大学 | Method for recycling sodium hydroxide from pigment containing alkali waste liquid |
-
1999
- 1999-04-19 CN CN 99105323 patent/CN1123537C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1270922A (en) | 2000-10-25 |
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| C14 | Grant of patent or utility model | ||
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| 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 |