CN101811684A - Method for co-production of granular monoammonium phosphate by using powdery monoammonium phosphate production device - Google Patents
Method for co-production of granular monoammonium phosphate by using powdery monoammonium phosphate production device Download PDFInfo
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- CN101811684A CN101811684A CN200910102880A CN200910102880A CN101811684A CN 101811684 A CN101811684 A CN 101811684A CN 200910102880 A CN200910102880 A CN 200910102880A CN 200910102880 A CN200910102880 A CN 200910102880A CN 101811684 A CN101811684 A CN 101811684A
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- monoammonium phosphate
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Abstract
The invention discloses a method for the co-production of granular monoammonium phosphate by using a powdery monoammonium phosphate production device. The method comprises the following steps: neutralizing phosphoric acid and ammonia by adopting a neutralizing slurry concentrating method; after secondary steam-heating and concentrating, separating part of concentrated ammonium phosphate slurry from a secondary heater of the powdery monoammonium phosphate production device; and granulating, drying, crashing and screening to obtain a granular monoammonium phosphate product. The neutralization degree of the concentrated ammonium phosphate slurry is controlled to be between 0.85 and 1.25; the moisture content of the slurry is controlled to be between 35 and 45 percent; hot air or flue gas is used for drying; the drying temperature is between 400 and 600 DEG C; the moisture content of the dried product is less than or equal to 2.0 percent; and after crashing and screening, the granular monoammonium phosphate products with the granularity between 1 and 4 mm account for more than or equal to 90 percent of the total amount of the products. The method realizes that the powdery monoammonium phosphate and granular monoammonium phosphate slurry use the same production device, realizes the co-production of the powdery products by using the granular products, brings the advantages of producing the granular monoammonium phosphate by using a concentration method into play, and provides a way for the enlargement of granular monoammonium phosphate devices, thereby adapting to market needs and promoting the development of phosphate fertilizer industry.
Description
Technical field
The present invention relates to phosphoric acid salt, furthermore, relate to monoammonium phosphate, specifically, relate to the method for powdery monoammonium phosphate coproduction granular monoammonium phosphate.
Background technology
Powdery monoammonium phosphate is mainly used in composite fertilizer and produces, and part is used for the fire control equipment raw material.On the market, supply exceed demand for powdery one ammonium, and bigger to the granular monoammonium phosphate product demand both at home and abroad.But traditional method is adopted in the production of granular monoammonium phosphate usually at present, and device capability is often less than producing 100000 tons of P per year
2O
5The device of existing production powdery monoammonium phosphate can not be directly used in the production granular monoammonium phosphate.By retrieval, up to now, the patent that relates to the coproduction monoammonium phosphate only has " technology of slurry concentrated process coproduction diammonium phosphate and monoammonium phosphate " No. 200810048758.7, does not still have the patent application of powdery monoammonium phosphate production equipment coproduction granular monoammonium phosphate.
Summary of the invention
The object of the present invention is to provide method with powdery monoammonium phosphate production equipment coproduction granular monoammonium phosphate, make the device of the bigger production powdery monoammonium phosphate of throughput can be directly used in the production granular monoammonium phosphate, thereby enlarge the throughput of granular monoammonium phosphate, satisfy market demand.
Original powdery monoammonium phosphate production equipment is with the neutralization of the phosphoric acid behind the pre-concentration and ammonia, successively by the secondary steam heating concentrate, primary steam once heats concentrated, warm air spraying drying, after the cooling, make powdery monoammonium phosphate; The method that the contriver provides is to tell a part of spissated phosphor ammonium slurry after the second heater of powdery monoammonium phosphate device, becomes granular monoammonium phosphate product by granulating and drying, crushing and screening.
Above-mentioned spissated phosphor ammonium slurry degree of neutralization is controlled to be 0.85～1.25, and slip moisture content is controlled to be 35%～45%.
The processing condition of above-mentioned granulating and drying are: adopt warm air or flue gas drying, warm air or flue gas drying temperature are 400 ℃～600 ℃, dry back granular monoammonium phosphate product moisture content≤2.0%.
Behind the above-mentioned crushing and screening, the granularity of granular monoammonium phosphate product is 1-4mm 〉=90%.
Method of the present invention has realized powdery monoammonium phosphate and the shared cover production equipment of granular phosphoric acid material pulp, realizes powder-like product coproduction granulated product; Brought into play method of enrichment and produced the granular monoammonium phosphate advantage,, thereby adapted to market demand, promoted the phosphate fertilizer industrial expansion for the extension of granular monoammonium phosphate device provides an approach.
Description of drawings
Accompanying drawing is the process flow diagram of the inventive method.
Embodiment
Urn good fortune phosphate fertilizer plant of embodiment urn good fortune (group) company limited produces 240000 tons of powdery monoammonium phosphates per year (with P original " in and slurry concentrated process "
2O
5Meter, on the basis down together), device is carried out the slip system reform, enlarge the throughput of neutralization and second heater, after the second heater of powdery monoammonium phosphate device, tell a part of spissated phosphor ammonium slurry again, become granular monoammonium phosphate product by granulating and drying, crushing and screening, build up and produce 120000 tons of granular monoammonium phosphate devices of 240,000 tons of powdery monoammonium phosphate coproduction per year.Wherein, neutralization back phosphor ammonium slurry degree of neutralization is controlled at 0.85～1.25, moisture content 40%～50%, and after second heater concentrates, slip 0.85～1.25, moisture content 35～45%.The granular monoammonium phosphate product technical indicator of producing is: 1. moisture content≤2.0%; 2. N 〉=9%; 3. P
2O
5〉=49%; 4. granularity 1-4mm 〉=90%.
Claims (4)
1. use the method for powdery monoammonium phosphate production equipment coproduction granular monoammonium phosphate, system adopts " in and slurry concentrated process ", with phosphoric acid behind the pre-concentration and ammonia neutralization, heating concentrates through secondary steam, it is characterized in that this method is to tell a part of spissated phosphor ammonium slurry after the second heater of powdery monoammonium phosphate device, becomes granular monoammonium phosphate product by granulating and drying, crushing and screening.
2. the method for claim 1 is characterized in that described spissated phosphor ammonium slurry degree of neutralization is controlled to be 0.85～1.25, and slip moisture content is controlled to be 35%～45%.
3. the method for claim 1 is characterized in that the processing condition of described granulating and drying are: adopt warm air or flue gas drying, the drying temperature of warm air or stack gas is 400 ℃～600 ℃, dried granular monoammonium phosphate product moisture content≤2.0%.
4. the method for claim 1, it is characterized in that described crushing and screening after, the granularity of granular monoammonium phosphate product is 1-4mm 〉=90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101028802A CN101811684B (en) | 2009-11-23 | 2009-11-23 | Method for co-production of granular monoammonium phosphate by using powdery monoammonium phosphate production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101028802A CN101811684B (en) | 2009-11-23 | 2009-11-23 | Method for co-production of granular monoammonium phosphate by using powdery monoammonium phosphate production device |
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| Publication Number | Publication Date |
|---|---|
| CN101811684A true CN101811684A (en) | 2010-08-25 |
| CN101811684B CN101811684B (en) | 2011-12-28 |
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| CN2009101028802A Active CN101811684B (en) | 2009-11-23 | 2009-11-23 | Method for co-production of granular monoammonium phosphate by using powdery monoammonium phosphate production device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601165A (en) * | 2013-11-14 | 2014-02-26 | 天津大学 | Method for changing crystal morphology of ammonium dihydrogen phosphate by using additive |
| CN104310346A (en) * | 2014-09-19 | 2015-01-28 | 贵州大学 | Method for preparing dipotassium hydrogen phosphate and preparing special fertilizer for spinach as byproduct |
-
2009
- 2009-11-23 CN CN2009101028802A patent/CN101811684B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601165A (en) * | 2013-11-14 | 2014-02-26 | 天津大学 | Method for changing crystal morphology of ammonium dihydrogen phosphate by using additive |
| CN103601165B (en) * | 2013-11-14 | 2015-08-12 | 天津大学 | Additive is utilized to change the method for crystal morphology of ammonium dihydrogen phosphate |
| CN104310346A (en) * | 2014-09-19 | 2015-01-28 | 贵州大学 | Method for preparing dipotassium hydrogen phosphate and preparing special fertilizer for spinach as byproduct |
| CN104310346B (en) * | 2014-09-19 | 2016-03-30 | 贵州大学 | A kind of production method preparing dipotassium hydrogen phosphate by-product spinach special fertilizer |
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| Publication number | Publication date |
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| CN101811684B (en) | 2011-12-28 |
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Address after: 550500 Guizhou Province, Qiannan Buyei and Miao Autonomous Prefecture Fuquan Racecourse town Yingbin Road No. 1 Wengfu group Patentee after: WENGFU GROUP Co.,Ltd. Address before: 23, 550002 floor, International Building, No. 57, South City Road, Nanming District, Guiyang, Guizhou Patentee before: WENGFU GROUP Co.,Ltd. |
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