CN103395803A - Production method for powdery ammonium sulfate - Google Patents
Production method for powdery ammonium sulfate Download PDFInfo
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- CN103395803A CN103395803A CN2013103310630A CN201310331063A CN103395803A CN 103395803 A CN103395803 A CN 103395803A CN 2013103310630 A CN2013103310630 A CN 2013103310630A CN 201310331063 A CN201310331063 A CN 201310331063A CN 103395803 A CN103395803 A CN 103395803A
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Abstract
The invention discloses a production method for powdery ammonium sulfate, and relates to ammonium sulfate. The method comprises the steps of firstly introducing an ammonium sulfate solution produced by a device for preparing ammonium sulfate by using phosphogypsum to an ammonium device ammoniation reactor for circulation, controlling free acid of the ammonium sulfate solution within 0.05-0.1% and a pH value within 6-6.5 by an ammonia compensation measure; then introducing the ammonium sulfate solution to a double effect evaporator for concentration, controlling a concentration of a concentrated suspension slurry within 1.30-1.32 g/mL; introducing the concentrated slurry into a single effect evaporator for concentration, controlling a terminal point within 1.38-1.40 g/mL and water content of the slurry within 25%-30%; pumping the single effect concentrated slurry in a drying tower to carry out fluidized drying by a three-cylinder high-pressure pump; and delivering a product to a finished product-packaging system through a conveying belt. By adopting the production method to produce a powdery ammonium sulfate product, production is on a large scale; investment cost is low; and N and S content of the product reaches a standard of crystal ammonium sulfate produced by a crystallization method.
Description
Technical field
The present invention relates to the vitriol of ammonium, specifically utilize the ammoniumsulphate soln of phosphogypsum ammonium sulfate output processed to prepare the powdery ammonium sulfate product.
Background technology
The ammoniumsulphate soln that phosphogypsum ammonium sulfate production processed goes out, traditional method adopt the concentrated mode that adds centrifugation of steam to produce crystal ammonium sulfate.Adopt this method to exist the facility investment expense high, production capacity is hanged down shortcomings such as reaching the difficult control of water balance.
In Chinese patent database, there is no at present the method for utilizing ammoniumsulphate soln production powdery ammonium sulfate.
Summary of the invention
The purpose of this invention is to provide a kind of ammoniumsulphate soln that utilizes phosphogypsum ammonium sulfate production processed by concentrating, dust, the method for dry production powdery ammonium sulfate.
To contain the suspension slip of a large amount of ammonium sulfate crystallization nucleus, by high-pressure pump, send into dehumidification system, and adopt the warm air of hotblast stove generation as drying medium production powdery ammonium sulfate product.By adopting idle powdery one ammonium device production powdery ammonium sulfate product, solve the not enough bottleneck problem of phosphogypsum plant capacity, vitalize simultaneously idle powdery one ammonium device.
The present invention takes full advantage of existing production equipment, adopt ammoniumsulphate soln by concentrating, dust, drying mode production powdery ammonium sulfate product.The contriver is through exploring and test, the ammoniumsulphate soln that phosphogypsum ammonium sulfate production processed is provided by concentrating, dust, dry production powdery ammonium sulfate method.
Specific practice is: first the ammoniumsulphate soln of phosphogypsum ammonium sulfate device processed output is sent into to an ammonium device ammoniation reactor circulation, and by mending the ammonia measure, the free acid of ammoniumsulphate soln is controlled to 0.05-0.1%, pH is controlled 6-6.5, it is concentrated that the ammoniumsulphate soln of pH value modification stability is delivered to the II single-effect evaporator, suspension pulp density after concentrated is controlled at 1.30-1.32g/ml, it is further concentrated that slip after the II effect is concentrated is sent into the Ι single-effect evaporator, terminal density is controlled at 1.38-1.40g/ml, and the slip moisture control is 25%～30%; Slip after the Ι effect is concentrated is sent into drying tower by three cylinder high-pressure pump and is carried out fluidized drying, and the product that goes out fluidized-bed is sent into the finished product packing system by belt conveyor.
Above-mentioned drying tower bed temperature is controlled at 60～75 ℃, and the inlet tower gas temperature is controlled at 140～160 ℃.
In aforesaid method, described raw material that powdery ammonium sulfate the uses ammoniumsulphate soln as phosphogypsum ammonium sulfate production processed, the density: 1.23-1.25g/ ml, water ratio: 50%～58% N content: 20.5-21.0% free acid:<=1% produced.
The powdery ammonium sulfate product that aforesaid method is produced, the nutrient quality is: N>=20.5% S>=22.0%
H
2O<=1% free acid:<=0.08%.
Method provided by the invention has following advantage:
(1) utilize the ammoniumsulphate soln of phosphogypsum ammonium sulfate device processed production to carry out the degree of depth concentrated, the suspension slip that becomes to contain the mass crystallization nucleus by the open form dry production powdery ammonium sulfate product that dusts, production scale is large, and investment cost is low; (2) by the employing powdery one ammonium device production powdery ammonium sulfate of leaving unused, Powder MAP device fixed capital have been vitalized; (3) because powdery one ammonium device hotblast stove adopts indirect heat exchange, dry ammonium sulfate product be the dry air that cleans, product N, S content reach the crystal ammonium sulfate standard that adopts crystallization process to produce; (4) because of in and the free acid content of enrichment process ammoniumsulphate soln be effectively controlled, solved the agglomeration problems after the packing of product.
The accompanying drawing explanation
Accompanying drawing is process flow diagram explanation of the present invention.
Embodiment
Wengfu phosphate fertilizer plant of Wengfu (group) company limited uses the inventive method, utilize an idle cover 200kt/a MAP Plant by the ammoniumsulphate soln of phosphogypsum ammonium sulfate production processed concentrate, dust, dry production powdery ammonium sulfate product, formed the ammonium sulfate product throughput of 160kt/a at present.
flow process as shown in drawings, by the density of phosphogypsum ammonium sulfate output processed, be that the 1.23-1.25g/ml ammoniumsulphate soln is sent into an ammonium device ammoniation reactor circulation, and by mending the ammonia measure, the free acid of ammoniumsulphate soln is controlled to 0.05-0.1%, the solution pH value is controlled 6-6.5, it is concentrated that the ammoniumsulphate soln of pH value modification stability is delivered to the II single-effect evaporator, suspension pulp density after concentrated is controlled at 1.30-1.32g/ml, it is further concentrated that slip after the II effect is concentrated is sent into the Ι single-effect evaporator, terminal density is controlled at 1.38-1.40g/ml, the slip moisture control is the quality percentage composition more than 25%～30%().Slip after the Ι effect is concentrated is sent into drying tower by three cylinder high-pressure pump and is carried out fluidized drying, and the drying tower bed temperature is controlled at 60～75 ℃, and the inlet tower gas temperature is controlled at 150～160 ℃.The product that goes out fluidized-bed is sent into the finished product packing system by belt conveyor.
Be below-14 days on the 7th August in 2011 ammoniumsulphate soln component and quality condition
| Project | N （%） | S （%） | Free acid (%) | PH | H 2O （%） |
| Analytical data | 20.8 | 22.9 | 0.9 | 3.5 | 54 |
The powdery ammonium sulfate product situation that-14 days on the 7th August in 2011 produced:
Claims (4)
1. the production method of a powdery ammonium sulfate, is characterized in that the method comprises the steps:
(1) first the ammoniumsulphate soln of phosphogypsum ammonium sulfate device processed output is sent into to an ammonium device ammoniation reactor circulation, and by mending the ammonia measure, the free acid of ammoniumsulphate soln is controlled to 0.05-0.1%, pH is controlled 6-6.5;
(2) ammoniumsulphate soln of pH value modification stability being delivered to the II single-effect evaporator concentrates, suspension pulp density after concentrated is controlled at 1.30-1.32g/ml, it is further concentrated that slip after the II effect is concentrated is sent into the Ι single-effect evaporator, terminal density is controlled at 1.38-1.40g/ml, and the slip moisture control is 25%～30%;
(3) slip after Ι effect is concentrated is sent into drying tower by three cylinder high-pressure pump and is carried out fluidized drying, and the product that goes out fluidized-bed is sent into the finished product packing system by belt conveyor.
2. the method for claim 1, is characterized in that the density of ammoniumsulphate soln in step (1): 1.23-1.25g/ ml, water ratio: 50%～58%, N content: 20.5-21.0%, free acid:<=1%.
3. the method for claim 1, is characterized in that the bed temperature of drying tower in described step (3) is controlled at 60～75 ℃, and the inlet tower gas temperature is controlled at 140～160 ℃.
4. the method for claim 1, is characterized in that the powdery ammonium sulfate product that described method is produced, and the nutrient quality is: N>=20.5%, S>=22.0%, H
2O<=1%, You Li Suan<=0.08%.
Priority Applications (1)
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|---|---|---|---|
| CN2013103310630A CN103395803A (en) | 2013-08-01 | 2013-08-01 | Production method for powdery ammonium sulfate |
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| CN2013103310630A CN103395803A (en) | 2013-08-01 | 2013-08-01 | Production method for powdery ammonium sulfate |
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| CN103395803A true CN103395803A (en) | 2013-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103626205A (en) * | 2013-12-11 | 2014-03-12 | 北京世纪地和控股有限公司 | Method for separating potassium sulfate from ammonium sulfate |
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| GB896457A (en) * | 1959-09-01 | 1962-05-16 | Basf Ag | Improvements in the separation of sulphur oxides from waste gases |
| EP0386043B1 (en) * | 1987-11-02 | 1994-12-07 | Retec Ltd | Granular ammonium sulphate and process for the production thereof |
| EP1067093A1 (en) * | 1999-07-07 | 2001-01-10 | Biomihania Fosforikon Lipasmaton A.E. | Method for the preparation of granular ammonium sulphate |
| CN101269823A (en) * | 2008-05-07 | 2008-09-24 | 瓮福（集团）有限责任公司 | Method for producing ammonium sulphate with phosphogypsum as raw material |
| CN101481222A (en) * | 2009-02-28 | 2009-07-15 | 四川宏达股份有限公司 | Method for preparing sulphoaluminate cement by-product ammonia sulfate by partly converting phosphogypsum |
| CN101544381A (en) * | 2009-04-30 | 2009-09-30 | 江苏华达化工集团有限公司 | Method for producing ammonium sulphate by waste water produced in alpha naphthol production |
| DE102008059754A1 (en) * | 2008-12-01 | 2010-06-02 | Gea Messo Gmbh | Process for producing a coarse ammonium sulphate product |
| CN101759200A (en) * | 2008-12-08 | 2010-06-30 | 河南新天地药业有限公司 | Technology for treating DL-p-hydroxyphenylglycine synthetic mother liquor |
| CN102602962A (en) * | 2012-04-13 | 2012-07-25 | 瓮福（集团）有限责任公司 | Method for preparing ammonium sulfate by use of dilute acid generated by pyrite-based acid production |
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2013
- 2013-08-01 CN CN2013103310630A patent/CN103395803A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| GB896457A (en) * | 1959-09-01 | 1962-05-16 | Basf Ag | Improvements in the separation of sulphur oxides from waste gases |
| EP0386043B1 (en) * | 1987-11-02 | 1994-12-07 | Retec Ltd | Granular ammonium sulphate and process for the production thereof |
| EP1067093A1 (en) * | 1999-07-07 | 2001-01-10 | Biomihania Fosforikon Lipasmaton A.E. | Method for the preparation of granular ammonium sulphate |
| CN101269823A (en) * | 2008-05-07 | 2008-09-24 | 瓮福（集团）有限责任公司 | Method for producing ammonium sulphate with phosphogypsum as raw material |
| DE102008059754A1 (en) * | 2008-12-01 | 2010-06-02 | Gea Messo Gmbh | Process for producing a coarse ammonium sulphate product |
| CN101759200A (en) * | 2008-12-08 | 2010-06-30 | 河南新天地药业有限公司 | Technology for treating DL-p-hydroxyphenylglycine synthetic mother liquor |
| CN101481222A (en) * | 2009-02-28 | 2009-07-15 | 四川宏达股份有限公司 | Method for preparing sulphoaluminate cement by-product ammonia sulfate by partly converting phosphogypsum |
| CN101544381A (en) * | 2009-04-30 | 2009-09-30 | 江苏华达化工集团有限公司 | Method for producing ammonium sulphate by waste water produced in alpha naphthol production |
| CN102602962A (en) * | 2012-04-13 | 2012-07-25 | 瓮福（集团）有限责任公司 | Method for preparing ammonium sulfate by use of dilute acid generated by pyrite-based acid production |
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| 赵祥礼等: "硫酸铵生产周期性不结晶的原因分析", 《硫酸工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103626205A (en) * | 2013-12-11 | 2014-03-12 | 北京世纪地和控股有限公司 | Method for separating potassium sulfate from ammonium sulfate |
| CN103626205B (en) * | 2013-12-11 | 2015-03-18 | 北京世纪地和控股有限公司 | Method for separating potassium sulfate from ammonium sulfate |
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Application publication date: 20131120 |