CN104550139A - Phosphoric acid production equipment and pipeline cleaning scale removal method - Google Patents
Phosphoric acid production equipment and pipeline cleaning scale removal method Download PDFInfo
- Publication number
- CN104550139A CN104550139A CN201410713880.7A CN201410713880A CN104550139A CN 104550139 A CN104550139 A CN 104550139A CN 201410713880 A CN201410713880 A CN 201410713880A CN 104550139 A CN104550139 A CN 104550139A
- Authority
- CN
- China
- Prior art keywords
- percent
- phosphoric acid
- acid
- scale
- production equipment
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/34—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/36—Organic compounds containing phosphorus
Abstract
The invention discloses phosphoric acid production equipment and a pipeline cleaning scale removal method. According to the method, amino tri (methylene phosphonic acid), phosphono carboxylic acid, acrylamide-sodium allylsulfonate copolymers, multipolymers, crylic acid-acrylic ester-sulphonate copolymers and slow-release agents are adopted for preparing a scale inhibitor, the mass percent of the amino tri (methylene phosphonic acid) in the scale inhibitor is 2 percent to 6 percent, the mass percent of the phosphono carboxylic acid is 2 percent to 6 percent, the mass concentration of the acrylamide-sodium allylsulfonate copolymers is 4 percent to 8 percent, the mass concentration of the multipolymers is 4 percent to 8 percent, the mass concentration of the crylic acid-acrylic ester-sulphonate copolymers is 2 percent to 6 percent, and the mass percent of the slow-release agents is 0.01 percent to 0.02 percent; then, after the scale inhibitor is stirred and heated, the scale inhibitor is added into phosphoric acid equipment and a conveying pipeline, so that scale blocks are soaked by the scale inhibitor, and the scale blocks can be cleaned and removed. When the method is adopted, the scale block cleaning time is shortened, the cleaning cost is reduced, the operation efficiency of the device is improved, the configuration of the scale inhibitos is simple, and the use is convenient.
Description
Technical field
The present invention relates to equipment and the conveyance conduit of phosphoric acid production, also relate to descaling method and antisludging agent, furthermore, relate to the method for phosphoric acid production equipment and eliminating sludge in pipe.
Background technology
Crowd does known, and in wet phosphoric acid by dihydrate production process, in phosphorus ore, potassium, sodium, silicon and objectionable impurities easily cause the fouling of filtration, concentrator and pipeline.Tradition descaling method adopts labor cleaning, and foulant is hard, is difficult to cleaning, has a strong impact on normal production, adopt traditional labor cleaning's scale removal for certain company, each cleaning needs more than 120 hours.
Because the phosphorus ore impurity content that is formed at of foulant has very large relation, technic index, pipe material etc. also have a great impact fouling, there is no complete solution both at home and abroad at present.Many phosphate fertilizer plants take a series of measure, and as reduced phosphorus ore acid hydrolysis temperature, increase Insulation, modified filter disc structure and pipe material etc., have certain mitigation to fouling, but have little effect.
By being that the dirty block gathered in system for field scale removal process carries out X diffraction analysis to filtration, obtain the composition mainly Na of foulant
2siF
6, K
2siF
6and CaSO
42H
2o.Be combined with crystallization theory by interface energy, carry out simulated experiment in laboratory to vacuum filtering system, draw the precedence that dirty thing is separated out and formation mechenism, proposing can by Na by adding suitable antisludging agent
2siF
6, K
2siF
6limit degree of supersaturation increase, its Metastable zone width can be made to increase, can Na be made
2siF
6, K
2siF
6stability in supersaturated solution strengthens, thus slows down fouling.
Summary of the invention
The object of the present invention is to provide a kind of method of phosphoric acid production equipment and pipeline cleaning scale removal, cleaning and descaling can be carried out for equipment and conveyance conduit, overcome the defect of labor cleaning's scale removal time and effort consuming.
The method of a kind of phosphoric acid production equipment of the present invention and pipeline cleaning scale removal first adopts amino trimethyl to pitch phosphoric acid, phosphine carboxylic acid, olefin sulfonic acid copolymer, multiple copolymer, acrylic acid-acrylic ester-co-polymer of sulfonate and sustained release agent preparation antisludging agent, amino trimethyl fork phosphoric acid quality mark in antisludging agent is made to be 2%-6%, phosphine carboxylic acid mass fraction is 2%-6%, olefin sulfonic acid copolymerization mass concentration is 4%-8%, multiple copolymer mass concentration is 4%-8%, acrylic acid-acrylic ester-co-polymer of sulfonate mass concentration is 2%-6%, and sustained release agent mass fraction is 0.01%-0.02%; Then by after antisludging agent agitating heating, add in phosphate equipment and conveyance conduit, make antisludging agent soak dirty block, dirty block cleaning can be removed.
In above-mentioned antisludging agent, sustained release agent is sodium molybdate or ATMT.
The temperature of above-mentioned antisludging agent heating is 60 DEG C-80 DEG C.
The time of above-mentioned immersion dirt block is 12 hours.
After adopting the inventive method, shorten the clearance time of dirty block, reduce cleaning up cost, improve the operational efficiency of device, antisludging agent configuration is simple, easy to use, can also reclaim, be applicable to Wet-process Phosphoric Acid Production producer.
Detailed description of the invention
Below by way of detailed description of the invention, further illustrate beneficial effect of the present invention.
Embodiment 1: be first the amino trimethyl fork phosphoric acid 6kg of 98% by mass fraction, the mass fraction phosphine carboxylic acid 6kg that is 98%, the mass concentration olefin sulfonic acid copolymer 65kg that is 18%, mass concentration is multiple copolymer 65kg, the mass concentration acrylic acid-acrylic ester-co-polymer of sulfonate 50kg that is 58%, the mass concentration sustained release agent 30g that is 100% of 98%, add water mixing and stirring, is mixed with antisludging agent 600kg; In the antisludging agent of preparation, amino trimethyl fork phosphoric acid quality mark is 2%, phosphine carboxylic acid mass fraction is 2%, and olefin sulfonic acid copolymer quality mark is 4%, and multiple copolymer mass fraction is 4%, acrylic acid-acrylic ester-co-polymer of sulfonate mass fraction is 2%, and sustained release agent mass fraction degree is 0.01%; Squeeze into after antisludging agent being heated to 60 DEG C in phosphate equipment and conveyance conduit and immersion is carried out 12 hours to dirty block, can by dirty block cleaning removing.
Mass fraction is first amino trimethyl fork phosphatase 11 2kg, the mass fraction phosphine carboxylic acid 12kg that is 98%, the mass concentration olefin sulfonic acid copolymer 1 30kg that is 18% of 98% by embodiment 2, mass concentration is multiple copolymer 130kg, the mass concentration acrylic acid-acrylic ester-co-polymer of sulfonate 100kg that is 58%, the mass concentration sustained release agent 60g that is 100% of 98%, add water mixing and stirring, is mixed with antisludging agent 600kg; In the antisludging agent of preparation, amino trimethyl fork phosphoric acid quality mark is 6%, phosphine carboxylic acid mass fraction is 6%, and olefin sulfonic acid copolymer quality mark is 8%, and multiple copolymer mass fraction is 4%, acrylic acid-acrylic ester-co-polymer of sulfonate mass fraction is 2%, and sustained release agent mass fraction degree is 0.02%; Squeeze into after antisludging agent being heated to 80 DEG C in phosphate equipment and conveyance conduit and immersion is carried out 12 hours to dirty block, can by dirty block cleaning removing.
After adopting this method, the scavenging period of phosphate equipment and conveyance conduit can shorten 80 hours, and cleaning up cost reduces nearly 200,000 yuan/year, and each cleaning decreases P
20
5the loss of (phosphorus pentoxide) 800 tons.
Claims (4)
1. the method for a phosphoric acid production equipment and pipeline cleaning scale removal, it is characterized in that being: method first adopts amino trimethyl to pitch phosphoric acid, phosphine carboxylic acid, olefin sulfonic acid copolymer, multiple copolymer, acrylic acid-acrylic ester-co-polymer of sulfonate and sustained release agent preparation antisludging agent, amino trimethyl fork phosphoric acid quality mark in antisludging agent is made to be 2%-6%, phosphine carboxylic acid mass fraction is 2%-6%, olefin sulfonic acid copolymerization mass concentration is 4%-8%, multiple copolymer mass concentration is 4%-8%, acrylic acid-acrylic ester-co-polymer of sulfonate mass concentration is 2%-6%, sustained release agent mass fraction is 0.01%-0.02%, then by after antisludging agent agitating heating, add in phosphate equipment and conveyance conduit, make antisludging agent soak dirty block, dirty block cleaning can be removed.
2. the method for phosphoric acid production equipment and pipeline cleaning scale removal according to claim 1, is characterized in that being: in above-mentioned antisludging agent, sustained release agent is sodium molybdate or ATMT.
3. the method for phosphoric acid production equipment and pipeline cleaning scale removal according to claim 1, is characterized in that being: the temperature of above-mentioned antisludging agent heating is 60 DEG C-80 DEG C.
4. the method for phosphoric acid production equipment and pipeline cleaning scale removal according to claim 1, is characterized in that being: the time of above-mentioned immersion dirt block is 12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713880.7A CN104550139A (en) | 2014-12-02 | 2014-12-02 | Phosphoric acid production equipment and pipeline cleaning scale removal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713880.7A CN104550139A (en) | 2014-12-02 | 2014-12-02 | Phosphoric acid production equipment and pipeline cleaning scale removal method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104550139A true CN104550139A (en) | 2015-04-29 |
Family
ID=53067816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410713880.7A Pending CN104550139A (en) | 2014-12-02 | 2014-12-02 | Phosphoric acid production equipment and pipeline cleaning scale removal method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104550139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740111A (en) * | 2017-11-03 | 2018-02-27 | 安徽新合富力科技有限公司 | A kind of pack alloy chemically polishing method |
Citations (9)
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|---|---|---|---|---|
| CN1104222A (en) * | 1993-12-24 | 1995-06-28 | 化学工业部天津化工研究院 | Phosphonic carboxyl acid copolymer |
| CN1114952A (en) * | 1994-07-13 | 1996-01-17 | 韩允志 | Compound method of multicomponent compound anti-scale corrosion inhibitor |
| JP2001224933A (en) * | 2000-02-18 | 2001-08-21 | Hakuto Co Ltd | Scale suppression method for reverse osmosis membrane surface |
| CN1425618A (en) * | 2001-12-20 | 2003-06-25 | 川化集团有限责任公司 | Composite scale resistant corrosion inhibitor |
| CN1762857A (en) * | 2005-08-31 | 2006-04-26 | 刘天暘 | Scale inhibitor for wet method phosphoric acid manufacture |
| CN101117256A (en) * | 2007-07-20 | 2008-02-06 | 南京市第一精细化工公司精细化工厂 | Fully-organic inhibition dirty-proof industrial water conditioning agent and method for making same |
| CN101462800A (en) * | 2008-11-27 | 2009-06-24 | 王连新 | Composite water treatment medicament |
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-
2014
- 2014-12-02 CN CN201410713880.7A patent/CN104550139A/en active Pending
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|---|---|---|---|---|
| CN1104222A (en) * | 1993-12-24 | 1995-06-28 | 化学工业部天津化工研究院 | Phosphonic carboxyl acid copolymer |
| CN1114952A (en) * | 1994-07-13 | 1996-01-17 | 韩允志 | Compound method of multicomponent compound anti-scale corrosion inhibitor |
| JP2001224933A (en) * | 2000-02-18 | 2001-08-21 | Hakuto Co Ltd | Scale suppression method for reverse osmosis membrane surface |
| CN1425618A (en) * | 2001-12-20 | 2003-06-25 | 川化集团有限责任公司 | Composite scale resistant corrosion inhibitor |
| CN1762857A (en) * | 2005-08-31 | 2006-04-26 | 刘天暘 | Scale inhibitor for wet method phosphoric acid manufacture |
| CN101117256A (en) * | 2007-07-20 | 2008-02-06 | 南京市第一精细化工公司精细化工厂 | Fully-organic inhibition dirty-proof industrial water conditioning agent and method for making same |
| CN101462800A (en) * | 2008-11-27 | 2009-06-24 | 王连新 | Composite water treatment medicament |
| CN101698543A (en) * | 2009-11-17 | 2010-04-28 | 上海依科绿色工程有限公司 | Closed circulating water corrosion inhibitor, preparation method and application thereof |
| CN101786613A (en) * | 2009-11-18 | 2010-07-28 | 瓮福（集团）有限责任公司 | Method for inhibiting scales of wet-process phosphoric acid concentration heat exchanger |
Non-Patent Citations (1)
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|---|
| 安冠宇，张震: "抗沉积剂减缓湿法磷酸过滤系统结垢", 《磷肥与复肥》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740111A (en) * | 2017-11-03 | 2018-02-27 | 安徽新合富力科技有限公司 | A kind of pack alloy chemically polishing method |
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Application publication date: 20150429 |
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