CN102363580A - Method for preparing phosphate fertilizer by using sewage residue of phosphate fertilizer plant - Google Patents
Method for preparing phosphate fertilizer by using sewage residue of phosphate fertilizer plant Download PDFInfo
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- CN102363580A CN102363580A CN2011103195949A CN201110319594A CN102363580A CN 102363580 A CN102363580 A CN 102363580A CN 2011103195949 A CN2011103195949 A CN 2011103195949A CN 201110319594 A CN201110319594 A CN 201110319594A CN 102363580 A CN102363580 A CN 102363580A
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- phosphate fertilizer
- phosphoric acid
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- sewage slag
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Abstract
The invention discloses a method for preparing a phosphate fertilizer by using sewage residue of a phosphate fertilizer plant. The method comprises the following steps of: delivering the sewage residue to a reaction tank, adding phosphoric acid, stirring uniformly, and performing mixed reaction, wherein the adding amount of the phosphoric acid is based on the principle that the total amount of the phosphorus content of the phosphoric acid and the phosphorus content of the added sewage residue is slightly greater than the phosphorus content required by a final product; and delivering the slurry to drying equipment, drying till the free moisture is less than 2.5 percent, and thus obtaining a phosphate fertilizer product. By adopting the method, the water-soluble P2O5 content of the phosphate fertilizer product can be improved to over 40 percent of the total amount of the P2O5, the phosphate fertilizer can be used as a raw material fertilizer of a compound fertilizer, a cheap raw material is provided for preparing the compound fertilizer, and the phosphate fertilizer can be directly applied to crops. By adopting the method, the P2O5 in the sewage residue of the phosphate fertilizer plant can be realized, and waste is changed into valuable; and the method has low production cost and good economic benefit and environment-friendly significance.
Description
Technical field
The present invention relates to phosphate fertilizer, relate in particular to a kind of method of utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer.
Background technology
The production waste of China phosphate fertilizer plant generally contains the P of higher concentration
2O
5This phosphorus-containing wastewater is a kind of large-tonnage waste of phosphate fertilizer plant from the isolated sewage slag of filtering separation device after water technology; With certain state-owned phosphate fertilizer plant is example, and about 90,000 tons of annual sewage effluent sewerage slag after water technology (moisture about 50%, contain P in the dried slag
2O
5About 20%), contains P altogether
2O
5About 9000 tons.The domestic phosphate fertilizer plant of this sewage slag once was dried and made thick fertilizer or the fertile raw material of compound, but owing to contained P in this sewage slag
2O
5The overwhelming majority is solubility in citric acid P
2O
5, do not reach the water-soluble P that GB15063-2009 requires when being used for producing compound fertilizer
2O
5Should be not less than effective P
2O
540% requirement of content, therefore this sewage slag at home phosphate fertilizer plant generally make refuse storage bay reason, P wherein
2O
5Do not obtain recycling, phosphor resource is wasted, and store up and take a large amount of land resourcess, cause certain environmental pollution.
Existing patent 200410009462.6 " application of a kind of phosphorus-contained wastewater treating method and recovery phosphorus product thereof " provides and can a kind of phosphorus in the phosphorus-containing wastewater be reclaimed and be applied to produce phosphate fertilizer; But this method is to be flocculation agent with the molysite; The quaternary ammonium salt Weibull is that coagulant aids is removed the P contained compound in waste water or the treating water; Only be that phosphorated waste water is handled, can not recycle the sewage slag after the filtering separation.
Summary of the invention
The objective of the invention is to realize P in phosphate fertilizer plant's sewage slag
2O
5Recycling, improve P in the sewage slag
2O
5The value of recycling.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
(1) sewage slag is sent into reactive tank, adding phosphoric acid stirs and makes it hybrid reaction; The add-on of phosphoric acid is slightly larger than the phosphorus content that the finished product require with the total amount of the sewage slag phosphorus content of its phosphorus content and adding and is as the criterion;
(2) reacted slip is dried in drying plant contain free water content, promptly obtain the phosphate fertilizer product, can be processed into powdery phosphate fertilizer product or granular phosphorus fertilizer product according to purposes again less than 2.5%.
Above-mentioned sewage slag be phosphate fertilizer plant's phosphorus-containing wastewater in water technology from the isolated sewage slag of filtering separation device.
Above-mentioned phosphoric acid can be used the surplus phosphoric acid of impure higher collection, what slag phosphoric acid or common phosphoric acid by wet process.
The reaction times of above-mentioned sewage slag and phosphoric acid is 15～65min, and temperature of reaction is 45～80 ℃.
Contain effective P in the above-mentioned phosphate fertilizer product
2O
5Be 25～50%, wherein water-soluble P
2O
5About 10%～40%, and water-soluble P in the product
2O
5Content is not less than P
2O
540% of total amount.
The temperature of above-mentioned oven dry is 80～105 ℃, and the time of oven dry is 2～5h.
Above-mentioned phosphate fertilizer product is owing to contain higher P
2O
5, can be used as the material fertilizer of compound manure, for the preparation compound manure provides cheap raw material, also can directly be applied to farm crop.
The invention has the beneficial effects as follows:
(1) adopt the reaction of interpolation phosphoric acid and phosphorus-containing wastewater slag, the phosphate fertilizer product that obtains contains higher P
2O
5, can be used as the material fertilizer of compound manure, for the preparation compound manure provides cheap raw material, also can directly be applied to farm crop;
(2) the present invention can realize the P in phosphate fertilizer plant's sewage slag
2O
5Recycling, production cost is low, and is good in economic efficiency; For an effective way has been opened up in the comprehensive utilization of phosphate fertilizer plant's sewage slag; Reduced discharging wastes, turned waste into wealth, resource " has been eaten dried bleeding "; Have good economic benefits and environment protection significance, in China's phosphatic fertilizer company, have stronger demonstration meaning and promotional value.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Embodiment 1
(wherein water cut 46%, P in reactor drum, to add 1.30 tons of phosphorus-containing wastewater slags
2O
5Content is 12.3%) and 0.50 ton of what slag phosphoric acid (P
2O
5Content is 47.3%), stir, react 20min down at 60 ℃, then reaction product is sent into drying plant dry 5h under 80 ℃, dried reaction product is pulverized, obtain about 1.0 tons of powder-like products, its effective constituent is: effective P
2O
5Content 40.1%, wherein water-soluble P
2O
5Content 20.6%, water cut are 1.5%.
Embodiment 2
(wherein water cut 20%, P in reactor drum, to add 0.87 ton of phosphorus-containing wastewater slag
2O
5Content is 18.1%) and 0.96 ton of what slag phosphoric acid (P
2O
5Content is 24.6%), stir, react 15min down at 80 ℃; Then reaction product is sent into drying plant dry 3h under 90 ℃, add the water granulation after dry thing is pulverized, through dry, screening; Make its particle be 2～4mm>=90%; The about 40N of mean compressive strength obtains about 1.0 tons of particulate product, and its effective constituent is: effective P
2O
5Content 38.4%, water-soluble P
2O
5Content 20.7%, water cut are 1.9%.
Embodiment 3
(wherein water cut 40%, P in reactor drum, to add 1.55 tons of phosphorus-containing wastewater slags
2O
5Content is 18.0%) and 0.36 ton of what slag phosphoric acid (P
2O
5Content is 23.0%), stir, react 65min down at 45 ℃, then reaction product is sent into drying plant dry 2h under 105 ℃, dried reaction product is pulverized, obtain about 1.0 tons of powder-like products, its effective constituent is: effective P
2O
5Content 25.3%, water-soluble P
2O
5Content 10.4%, water cut are 1.2%.
Aspect economic benefit: certain factory prepares P by method of the present invention
2O
5Content is 40% phosphate fertilizer product, and about product needed sewage slag per ton (moisture 46%, contain P in the dried slag
2O
5About 22.7%) about 1.30t needs phosphoric acid (what slag phosphoric acid, P
2O
5About 47.3%) about 0.50t, the about 900 yuan/t of production cost; This phosphate fertilizer product is no matter be directly to be applied to farm crop as chemical fertilizer, and is still fertile as composite fertilizer material, presses P
2O
5Each nutrient 35 yuan of calculating, only P
2O
5The nutrient price can be sold for 1400 yuan/ton, and because substituted conventional composite fertilizer stopping composition such as the excellent powder of rod, reduces and even do not use excellent powder, thus economic worth at about 1500 yuan/ton, profit per ton is about 600 yuan, economic benefit is fairly obvious.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction; Anyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (7)
1. a method of utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer is characterized in that this method comprises the steps:
(1) sewage slag is sent into reactive tank, adding phosphoric acid stirs and makes it hybrid reaction; The add-on of phosphoric acid is slightly larger than the phosphorus content that the finished product require with the total amount of the sewage slag phosphorus content of its phosphorus content and adding and is as the criterion;
(2) reacted slip is dried in drying plant contain free water content, promptly obtain the phosphate fertilizer product, can be processed into powdery phosphate fertilizer product or granular phosphorus fertilizer product according to purposes again less than 2.5%.
2. the method for utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer according to claim 1, it is characterized in that said sewage slag be phosphate fertilizer plant's phosphorus-containing wastewater in water technology from the isolated sewage slag of filtering separation device.
3. the method for utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer according to claim 1 is characterized in that said phosphoric acid can use the surplus phosphoric acid of impure higher collection, what slag phosphoric acid or common phosphoric acid by wet process.
4. the method for utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer according to claim 1, the reaction times that it is characterized in that said sewage slag and phosphoric acid is 15～65min, temperature of reaction is 45～80 ℃.
5. the method for utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer according to claim 1 is characterized in that containing effective P in the said phosphate fertilizer product
2O
5Be 25～50%, wherein water-soluble P
2O
5About 10%～40%, and water-soluble P in the product
2O
5Content is not less than P
2O
540% of total amount.
6. the method for utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer according to claim 1, the temperature that it is characterized in that said oven dry is 80～105 ℃, the time of oven dry is 2～5h.
7. the method for utilizing phosphate fertilizer plant's sewage slag to prepare phosphate fertilizer according to claim 1 is characterized in that said phosphate fertilizer product owing to contain higher P
2O
5, can be used as the material fertilizer of compound manure, for the preparation compound manure provides cheap raw material, also can directly be applied to farm crop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103195949A CN102363580A (en) | 2011-10-20 | 2011-10-20 | Method for preparing phosphate fertilizer by using sewage residue of phosphate fertilizer plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103195949A CN102363580A (en) | 2011-10-20 | 2011-10-20 | Method for preparing phosphate fertilizer by using sewage residue of phosphate fertilizer plant |
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| Publication Number | Publication Date |
|---|---|
| CN102363580A true CN102363580A (en) | 2012-02-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103195949A Pending CN102363580A (en) | 2011-10-20 | 2011-10-20 | Method for preparing phosphate fertilizer by using sewage residue of phosphate fertilizer plant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674283A (en) * | 2012-05-20 | 2012-09-19 | 瓮福（集团）有限责任公司 | Filter residue re-slurrying method for producing crystalline monoammonium phosphate from extractive spent acid |
| CN103553722A (en) * | 2013-10-24 | 2014-02-05 | 瓮福（集团）有限责任公司 | Method for preparing super phosphate by use of ardealite slag site sewage |
| CN105367161A (en) * | 2015-10-30 | 2016-03-02 | 贵州开磷集团股份有限公司 | Method for preparing compound fertilizer by utilizing phosphorus-containing sewage |
| CN109153570A (en) * | 2016-05-18 | 2019-01-04 | 凯米拉公司 | The production of phosphatic fertilizer |
| CN114349572A (en) * | 2022-01-19 | 2022-04-15 | 云南云天化股份有限公司 | Method for producing compound fertilizer containing polymerized phosphorus by using citric soluble phosphorus slag |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210840A (en) * | 1997-09-10 | 1999-03-17 | 龚家竹 | Wet process for producing ammonium phosphate by using phosphate sludge |
| CN1509261A (en) * | 2001-05-17 | 2004-06-30 | 杰富意钢铁株式会社 | Material for phosphate fertilizer and for producing thereof |
-
2011
- 2011-10-20 CN CN2011103195949A patent/CN102363580A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210840A (en) * | 1997-09-10 | 1999-03-17 | 龚家竹 | Wet process for producing ammonium phosphate by using phosphate sludge |
| CN1509261A (en) * | 2001-05-17 | 2004-06-30 | 杰富意钢铁株式会社 | Material for phosphate fertilizer and for producing thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674283A (en) * | 2012-05-20 | 2012-09-19 | 瓮福（集团）有限责任公司 | Filter residue re-slurrying method for producing crystalline monoammonium phosphate from extractive spent acid |
| CN103553722A (en) * | 2013-10-24 | 2014-02-05 | 瓮福（集团）有限责任公司 | Method for preparing super phosphate by use of ardealite slag site sewage |
| CN105367161A (en) * | 2015-10-30 | 2016-03-02 | 贵州开磷集团股份有限公司 | Method for preparing compound fertilizer by utilizing phosphorus-containing sewage |
| CN105367161B (en) * | 2015-10-30 | 2019-02-15 | 贵州开磷集团股份有限公司 | A kind of method of phosphorus-containing wastewater slag preparation compound fertilizer |
| CN109153570A (en) * | 2016-05-18 | 2019-01-04 | 凯米拉公司 | The production of phosphatic fertilizer |
| CN114349572A (en) * | 2022-01-19 | 2022-04-15 | 云南云天化股份有限公司 | Method for producing compound fertilizer containing polymerized phosphorus by using citric soluble phosphorus slag |
| CN114349572B (en) * | 2022-01-19 | 2022-12-30 | 云南云天化股份有限公司 | Method for producing compound fertilizer containing polymerized phosphorus by using citric soluble phosphorus slag |
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Application publication date: 20120229 |