CN102746954A - Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate - Google Patents

Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate Download PDF

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Publication number
CN102746954A
CN102746954A CN2012102538895A CN201210253889A CN102746954A CN 102746954 A CN102746954 A CN 102746954A CN 2012102538895 A CN2012102538895 A CN 2012102538895A CN 201210253889 A CN201210253889 A CN 201210253889A CN 102746954 A CN102746954 A CN 102746954A
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CN
China
Prior art keywords
filter cloth
cleaning
raffinate
cleaning agent
filter
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.)
Pending
Application number
CN2012102538895A
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Chinese (zh)
Inventor
李红林
段士东
陈翱翔
田仁道
何廷贵
黎雪飞
尹健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wengfu Group Co Ltd
Original Assignee
Wengfu Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wengfu Group Co Ltd filed Critical Wengfu Group Co Ltd
Priority to CN2012102538895A priority Critical patent/CN102746954A/en
Publication of CN102746954A publication Critical patent/CN102746954A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate. The cleaning agent is characterized by mainly comprising fluosilicic acid with the concentration of 5%-10% which is heated to 58-62 DEG C. When the cleaning agent is used, the filter cloth demounted from a filter is directly placed in a cleaning pool to be soaked for 20-30 minutes and taken out to be cleaned with hot water again so as to be mounted on the filter to be reused. The cleaning agent has the advantages that a production process is simple and convenient to operate; the cleaning agent is easy to prepare and low in cost; and cleaning time for the filter cloth is short, cleaning is complete and life cycle of the filter cloth is prolonged.

Description

A kind of filter cloth clean-out system that cleans raffinate production crystal phosphoric acid one ammonium
Technical field
The present invention relates to clean-out system, relate in particular to a kind of clean-out system of producing in the crystal phosphoric acid one ammonium process that is applicable to.
Background technology
Raffinate is the sub product of purifying phosphoric acid, produces crystal phosphoric acid one ammonium with raffinate and needs in phosphor ammonium slurry, to add scavenging agent, waits the clean impurity of separation means to separate through filtration again, to guarantee quality product.Complicated because of its foreign matter content, the filter residue that applies during filtration on filter cloth is tested removing with general hot water very much, the reaction below raffinate and impurities thereof will take place in the ammonia N-process:
1、（Fe，Al） 3（H 3O）H 8（PO 4） 6·6H 2O+3Mg（H 2PO 4） 2+H 2SiF 6=?3（Fe，Al）MgNH 4（HPO 4）2F 2+6NH 4H 2PO 4+SiO 2+5H 2O
2、6（Fe，Al） 3MgNH 4（HPO 4） 2F 2+（NH 4） 2SiF 6+4NH 3+2H 2O=6（Fe，Al）Mg（NH 4） 2（HPO 4） 2F 2+SiO 2?
3、（Fe，Al）NH 4H 8（PO 4） 6·6H 2O+2NH 3=5.5H 2O?+3（Fe，Al）NH 4（HPO 4） 2·0.5H 2O
4、MgHPO 4+（NH 4） 2HPO 4+4H 2O=Mg（NH 4） 2（HPO 4） 2·4H 2O
5、Mg（NH 4） 2（HPO 4） 2·4H 2O=MgNH 4PO 4·H 2O+NH 4H 2PO 4+3H 2O
Fouling is the material that above chemical reaction generates: MgNH on the filter cloth 4PO 4H 2O, FeNH 4(HPO 4) 20.5H 2O, AlNH 4(HPO 4) 20.5H 2O and SiO 2.
Summary of the invention
The object of the present invention is to provide a kind of filter cloth clean-out system that raffinate is produced crystal phosphoric acid one ammonium that cleans.
Clean-out system of the present invention is: the sub product silicofluoric acid with producing phosphoric acid by wet process is mixed with the silicofluoric acid scavenging solution of 5%-10%, and is heated to 58-62 C.
The present invention after the filter cloth dismounting, directly puts into service sink and soaked 20-30 minute in use, can reinstall filter after taking-up reusable heat water cleans and reuse.
Principle of the present invention is: impurity all is phosphoric acid salt and monohydric phosphate on the filter cloth of raffinate production crystal phosphoric acid one ammonium, and silicofluoric acid can generate soluble fluoride silicate with phosphoric acid salt and monohydric phosphate reaction; Simultaneously, the digestion solution of silicofluoric acid can dissolve SiO 2.
The main chemical reactions that the present invention takes place is:
MgNH 4PO 4·H 2O+H 2SiF 6=?Mg?SiF 6+H 2O+NH 3+?H 3PO 4
2FeNH 4（HPO 4） 2·0.5H 2O?+3H 2SiF 6=?Fe 2(SiF 6) 3+H 2O+2NH 3+4?H 3PO 4
2AlNH 4（HPO 4） 2·0.5H 2O?+H 2SiF 6=?2Al 2(SiF 6) 3+H 2O+2NH 3+?4H 3PO 4
H 2SiF 6=SIF 4+2HF
6HF+SiO 2=?H 2SiF 6+2H 2O
The present invention has the following advantages:
(1) production technique is simple, is convenient to operation;
(2) scavenging solution is prone to preparation, and cost is low;
(3) the filter cloth scavenging period is short, cleans comparatively clean, prolongation filter cloth life cycle.
Embodiment
Embodiment 1
During filter cloth regeneration, after the filter cloth dismounting, directly put into service sink, the use temperature is that the concentration of 60 C is 5% rare silicate fluoride solution, soaks taking-up in 30 minutes, promptly reinstalls filter after reusable heat water cleans and reuses.
Embodiment 2
During filter cloth regeneration, after the filter cloth dismounting, directly put into service sink, the use temperature is that the concentration of 58 C is 8% rare silicate fluoride solution, soaks taking-up in 25 minutes, promptly reinstalls filter after reusable heat water cleans and reuses.
Embodiment 3
During filter cloth regeneration, after the filter cloth dismounting, directly put into service sink, the use temperature is that the concentration of 62 C is 10% rare silicate fluoride solution, soaks taking-up in 20 minutes, promptly reinstalls filter after reusable heat water cleans and reuses.

Claims (2)

1. one kind is cleaned the filter cloth clean-out system that raffinate is produced crystal phosphoric acid one ammonium, and the major ingredient that it is characterized in that this clean-out system is the silicate fluoride solution of 5%-10%.
2. a kind of filter cloth clean-out system that raffinate is produced crystal phosphoric acid one ammonium that cleans as claimed in claim 1 is characterized in that said clean-out system in use, need be heated to 58-62 C, soaks 20-30 minute.
CN2012102538895A 2012-07-23 2012-07-23 Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate Pending CN102746954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012102538895A CN102746954A (en) 2012-07-23 2012-07-23 Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012102538895A CN102746954A (en) 2012-07-23 2012-07-23 Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate

Publications (1)

Publication Number Publication Date
CN102746954A true CN102746954A (en) 2012-10-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012102538895A Pending CN102746954A (en) 2012-07-23 2012-07-23 Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate

Country Status (1)

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CN (1) CN102746954A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103349865A (en) * 2013-05-17 2013-10-16 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 Tilting-pan filter filtration cloth regeneration method
CN104548754A (en) * 2014-12-25 2015-04-29 湖北祥云(集团)化工股份有限公司 Cleaning method for ammonium phosphate filter cloth
CN105861190A (en) * 2016-04-01 2016-08-17 周昌明 Detergent for washing bean product filter cloth

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87103421A (en) * 1986-05-07 1987-12-16 罗纳·布郎克化学股份有限公司 The purging method of filtering surface
CN1724965A (en) * 2005-07-15 2006-01-25 贵州宏福实业开发有限总公司 Descaling method of phospheric acid concentration heat exchanger
CN102506608A (en) * 2011-10-08 2012-06-20 瓮福（集团）有限责任公司 Method for cleaning wet-method phosphoric acid concentration heat exchanger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87103421A (en) * 1986-05-07 1987-12-16 罗纳·布郎克化学股份有限公司 The purging method of filtering surface
CN1724965A (en) * 2005-07-15 2006-01-25 贵州宏福实业开发有限总公司 Descaling method of phospheric acid concentration heat exchanger
CN102506608A (en) * 2011-10-08 2012-06-20 瓮福（集团）有限责任公司 Method for cleaning wet-method phosphoric acid concentration heat exchanger

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103349865A (en) * 2013-05-17 2013-10-16 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 Tilting-pan filter filtration cloth regeneration method
CN103349865B (en) * 2013-05-17 2015-05-20 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 Tilting-pan filter filtration cloth regeneration method
CN104548754A (en) * 2014-12-25 2015-04-29 湖北祥云(集团)化工股份有限公司 Cleaning method for ammonium phosphate filter cloth
CN105861190A (en) * 2016-04-01 2016-08-17 周昌明 Detergent for washing bean product filter cloth
CN105861190B (en) * 2016-04-01 2018-08-17 周昌明 A kind of detergent for washing bean product filter cloth

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Application publication date: 20121024