CN102503589A - Method for recycling phosphorus-containing wastewater residue from phosphate fertilizer plant - Google Patents
Method for recycling phosphorus-containing wastewater residue from phosphate fertilizer plant Download PDFInfo
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- CN102503589A CN102503589A CN2011103195934A CN201110319593A CN102503589A CN 102503589 A CN102503589 A CN 102503589A CN 2011103195934 A CN2011103195934 A CN 2011103195934A CN 201110319593 A CN201110319593 A CN 201110319593A CN 102503589 A CN102503589 A CN 102503589A
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- phosphorus
- containing wastewater
- slag
- phosphate fertilizer
- fertilizer plant
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Abstract
The invention discloses a method for recycling phosphorus-containing wastewater residue from a phosphate fertilizer plant, comprising the following steps: mixing wastewater residue from the phosphate fertilizer plant and sulfuric acid in a reactor for reaction of 10-16min at 40-80 DEG C, wherein the wastewater residue contains 35-60% of water and 7-15% of P2O5, the sulfuric acid has the mass concentration of 50-98%, and the weight ratio of the wastewater residue to the sulfuric acid is 6-2:1; drying the product of reaction in drying equipment until the content of the free water is less than 2.5%; and grinding and processing the dried product of reaction into powder which can be used as the raw material of the compound fertilizer to provide phosphorus needed to prepare the compound fertilize. Due to the adoption of the method, the wastewater residue from the phosphate fertilizer plant can be recycled and changed into valuable materials which can be used as cheap raw materials to prepare the compound fertilize and provide the phosphorus needed to prepare the compound fertilizer and can be also directly used as the fertilizer applied to the crops.
Description
Technical field
The present invention relates to phosphate fertilizer, relate in particular to the method that a kind of phosphate fertilizer plant phosphorus-containing wastewater slag is recycled.
Background technology
Over nearly 20 years, along with the raising of China's phosphate fertilizer industrial expansion and environmental protection consciousness, country and enterprise are to reducing blowdown and the requirement of resource " eat dried bleed, efficiently utilization " being improved constantly.The phosphorus-containing wastewater slag is a kind of large-tonnage waste that phosphate fertilizer plant discharges from filtering separation device when Removal of Phosphorus in Wastewater in production of phosphate fertilizer, is example with certain state-owned phosphate fertilizer plant, and is annual from wastewater treatment working section discharge about 90,000 tons of slag of phosphorus-containing wastewater (moisture about 50%), contains P
2O
5About 9000 tons.The domestic phosphate fertilizer plant of this phosphorus-containing wastewater slag once was dried and made thick fertilizer or the fertile raw material of compound, but owing to contained P in the waste water 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 phosphorus-containing wastewater 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.
Through retrieval, the technical scheme of the recovery of pair phosphorus-containing wastewater is only arranged in the Chinese patent storehouse, the recycling of phosphorus-containing wastewater slag is not had record.
Summary of the invention
The object of the present invention is to provide a kind of method that phosphate fertilizer plant's phosphorus-containing wastewater slag is recycled, reaching turns waste into wealth, and the purpose of cheap raw material is provided for the preparation compound manure.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
(1) with phosphate fertilizer plant's waste water slag and sulfuric acid hybrid reaction in reactor drum, wherein, the waste water slag: the vitriolic mass ratio is 6～2:1, and the reaction times is 10～60min, and temperature of reaction is 40～80 ℃;
(2) reaction product that obtains is dried in drying plant contain free water content less than 2.5%;
(3) the reaction product grinding and processing powdering thing after will drying, this meal promptly can be used as the raw material of composite fertilizer, the phosphoric that provides composite fertilizer to need.
Above-mentioned phosphorus-containing wastewater slag is that phosphate fertilizer plant's phosphorus-containing wastewater obtains waste residue after water treatment, and waste water slag water cut is 35%～60%, waste water slag P
2O
5Content is 7%～15%.
Above-mentioned sulfuric acid can be industrial sulphuric acid, the useless or sulfuric acid that reclaims, sulfuric acid concentration 50%～98%.
Reaction product after the above-mentioned oven dry also can be processed into the particulate state fertilizer product and directly be applied to farm crop.
The temperature of above-mentioned oven dry is 80～105 ℃, and the time of oven dry is 2～5h.
The invention has the beneficial effects as follows: add the reaction of sulfuric acid and phosphorus-containing wastewater slag; The product that obtains contains abundant phosphorus element sulphur; The material fertilizer that can be used as in composite fertilizer's production is used; Also can be processed into granular product, directly as fertilizer sources is applied to farm crop, for an effective way has been opened up in the comprehensive utilization of phosphate fertilizer plant's phosphorus-containing wastewater slag; Simultaneously, this method has reduced discharging wastes, turns waste into wealth, and has good economic benefits and environment protection significance, and China's phosphatic fertilizer company is had 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 53%, P in reactor drum, to add 1.2 tons of phosphorus-containing wastewater slags
2O
5Content 10.5%) and 0.53 ton of sulfuric acid (contain H
2SO
4Measure 50.1%), stir, react 60min down at 50 ℃, with reaction product dry 2h under 105 ℃, dried reaction product is pulverized then, obtain 0.81 ton of powder-like product, its effective constituent is: effective P
2O
5Content 15.4%, water-soluble P
2O
5Content 12.4%, water cut are 1.5%.
Embodiment 2
(wherein water cut 35%, P in reactor drum, to add 1.0 tons of phosphorus-containing wastewater slags
2O
5Content 14.8%) and 0.48 ton of sulfuric acid (contain H
2SO
4Amount 60.2%), stirs, react 10min down at 80 ℃; Then with reaction product dry 2h under 90 ℃, with adding the water granulation after the dry thing pulverizing, through dry, screening; Make its particle be 2～4mm>=90%; The about 40N of mean compressive strength obtains about 0.94 ton of particulate product, and its effective constituent is: effective P
2O
5Content 15.7%, water-soluble P
2O
5Content 12.5%, water cut are 0.9%.
Embodiment 3
(wherein water cut 40%, P in reactor drum, to add 1.0 tons of phosphorus-containing wastewater slags
2O
5Content 13.7%) and 0.25 ton of sulfuric acid (contain H
2SO
4Measure 80%), stir, react 30min down at 60 ℃, with reaction product dry 3h under 85 ℃, dried reaction product is pulverized then, obtain 0.80 ton of powder-like product, its effective constituent is: effective P
2O
5Content 17.1%, water-soluble P
2O
5Content 11.8%, water cut are 1.2%.
Embodiment 4
(wherein water cut 60%, P in reactor drum, to add 1.0 tons of phosphorus-containing wastewater slags
2O
5Content 11.7%) and 0.17 ton of sulfuric acid (contain H
2SO
4Measure 98%), stir, react 20min down at 40 ℃, with reaction product dry 5h under 80 ℃, dried reaction product is pulverized then, obtain 0.60 ton of powder-like product, its effective constituent is: effective P
2O
5Content 20.3%, water-soluble P
2O
5Content 13.3%, water cut are 1.8%.
Aspect economic benefit: certain factory adopts present method phosphorus-containing wastewater slag after vitriolization, and product contains effective P
2O
5Be 14～17%, wherein water-soluble P
2O
5Be 12%～14%,, press P if fertile as composite fertilizer material
2O
5Each nutrient 30 yuan of calculating, only P
2O
5The nutrient price can be sold for 420～510 yuan/ton; And, reduce and even do not use excellent powder, so economic worth is at about 620～710 yuan/ton because substituted conventional composite fertilizer stopping composition such as the excellent powder of rod; And total cost per ton is merely about 250 yuan, and 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)
1.1 the method that phosphate fertilizer plant's phosphorus-containing wastewater slag is recycled is characterized in that this method comprises the steps:
(1) with phosphate fertilizer plant's waste water slag and sulfuric acid hybrid reaction in reactor drum, wherein, the waste water slag: the vitriolic mass ratio is 6～2:1, and the reaction times is 10～60min, and temperature of reaction is 40～80 ℃;
(2) reaction product that obtains is dried in drying plant contain free water content less than 2.5%;
(3) the reaction product grinding and processing powdering thing after will drying, this meal promptly can be used as the raw material of composite fertilizer, the phosphoric that provides composite fertilizer to need.
2. the method that phosphate fertilizer plant according to claim 1 phosphorus-containing wastewater slag is recycled is characterized in that said waste water slag is the phosphorus-containing wastewater slag that phosphate fertilizer plant's phosphorus-containing wastewater obtains after water treatment.
3. the method that phosphate fertilizer plant according to claim 1 and 2 phosphorus-containing wastewater slag is recycled is characterized in that said waste water slag water cut 35%～60%, waste water slag P
2O
5Content is 7%～15%.
4. the method that phosphate fertilizer plant according to claim 1 phosphorus-containing wastewater slag is recycled is characterized in that said sulfuric acid can be industrial sulphuric acid, the useless or sulfuric acid that reclaims.
5. the method that phosphate fertilizer plant according to claim 1 phosphorus-containing wastewater slag is recycled is characterized in that said vitriolic concentration is 50%～98%.
6. the method that phosphate fertilizer plant according to claim 1 phosphorus-containing wastewater slag is recycled, 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 that phosphate fertilizer plant according to claim 1 phosphorus-containing wastewater slag is recycled is characterized in that the reaction product after the described oven dry also can be processed into granular product, and directly as fertilizer sources is applied to farm crop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103195934A CN102503589A (en) | 2011-10-20 | 2011-10-20 | Method for recycling phosphorus-containing wastewater residue from phosphate fertilizer plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103195934A CN102503589A (en) | 2011-10-20 | 2011-10-20 | Method for recycling phosphorus-containing wastewater residue from phosphate fertilizer plant |
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|---|---|
| CN102503589A true CN102503589A (en) | 2012-06-20 |
Family
ID=46215740
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| CN2011103195934A Pending CN102503589A (en) | 2011-10-20 | 2011-10-20 | Method for recycling phosphorus-containing wastewater residue from phosphate fertilizer plant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807457A (en) * | 2012-09-01 | 2012-12-05 | 曹志强 | Mineral nutrient for ginseng and American ginseng and preparation method of mineral nutrient |
| CN102815739A (en) * | 2012-08-29 | 2012-12-12 | 攀枝花市坤乃机械制造有限责任公司 | Spiral reactor and method for treating phosphorous slag and waste sulfuric 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 |
| CN103626528A (en) * | 2013-11-28 | 2014-03-12 | 瓮福（集团）有限责任公司 | Method for producing granular ammonium sulphate by using phosphorus-containing wastewater |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275639A (en) * | 1993-03-10 | 1994-01-04 | Tennessee Valley Authority | Recovery of phosphates from elemental phosphorus bearing wastes |
| CN1159436A (en) * | 1996-03-12 | 1997-09-17 | 云南磷肥厂 | Mixed phosphate fertilizer |
| CN1206701A (en) * | 1998-04-27 | 1999-02-03 | 威远县磷钙饲料厂 | Process for producing calcium superphosphate from defluorinated slag |
| CN1210840A (en) * | 1997-09-10 | 1999-03-17 | 龚家竹 | Wet process for producing ammonium phosphate by using phosphate sludge |
| US20040025553A1 (en) * | 2002-05-28 | 2004-02-12 | Jose Cabello-Fuentes | Process for transforming sludge into NPK type granulated fertilizer |
| WO2008101250A1 (en) * | 2007-02-16 | 2008-08-21 | Vitag Corporation | Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer |
| CN101781126A (en) * | 2010-02-04 | 2010-07-21 | 苏州群瑞环保科技有限公司 | Method for producing special phosphate fertilizer for tower from industrial sludge |
| CN101905933A (en) * | 2010-07-28 | 2010-12-08 | 中化重庆涪陵化工有限公司 | Treating method for phosphoric waste water and sludge generated in production process of phosphatic compound fertilizer |
-
2011
- 2011-10-20 CN CN2011103195934A patent/CN102503589A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275639A (en) * | 1993-03-10 | 1994-01-04 | Tennessee Valley Authority | Recovery of phosphates from elemental phosphorus bearing wastes |
| CN1159436A (en) * | 1996-03-12 | 1997-09-17 | 云南磷肥厂 | Mixed phosphate fertilizer |
| CN1210840A (en) * | 1997-09-10 | 1999-03-17 | 龚家竹 | Wet process for producing ammonium phosphate by using phosphate sludge |
| CN1206701A (en) * | 1998-04-27 | 1999-02-03 | 威远县磷钙饲料厂 | Process for producing calcium superphosphate from defluorinated slag |
| US20040025553A1 (en) * | 2002-05-28 | 2004-02-12 | Jose Cabello-Fuentes | Process for transforming sludge into NPK type granulated fertilizer |
| WO2008101250A1 (en) * | 2007-02-16 | 2008-08-21 | Vitag Corporation | Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer |
| CN101781126A (en) * | 2010-02-04 | 2010-07-21 | 苏州群瑞环保科技有限公司 | Method for producing special phosphate fertilizer for tower from industrial sludge |
| CN101905933A (en) * | 2010-07-28 | 2010-12-08 | 中化重庆涪陵化工有限公司 | Treating method for phosphoric waste water and sludge generated in production process of phosphatic compound fertilizer |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815739A (en) * | 2012-08-29 | 2012-12-12 | 攀枝花市坤乃机械制造有限责任公司 | Spiral reactor and method for treating phosphorous slag and waste sulfuric acid |
| CN102807457A (en) * | 2012-09-01 | 2012-12-05 | 曹志强 | Mineral nutrient for ginseng and American ginseng and preparation method of mineral nutrient |
| 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 |
| CN103626528A (en) * | 2013-11-28 | 2014-03-12 | 瓮福（集团）有限责任公司 | Method for producing granular ammonium sulphate by using phosphorus-containing wastewater |
| 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 |
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Application publication date: 20120620 |