CN102674904A - Diammonium phosphate system and production technique for producing diammonium phosphate with single-tube reactor - Google Patents
Diammonium phosphate system and production technique for producing diammonium phosphate with single-tube reactor Download PDFInfo
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- CN102674904A CN102674904A CN2012101549318A CN201210154931A CN102674904A CN 102674904 A CN102674904 A CN 102674904A CN 2012101549318 A CN2012101549318 A CN 2012101549318A CN 201210154931 A CN201210154931 A CN 201210154931A CN 102674904 A CN102674904 A CN 102674904A
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Abstract
The invention provides a diammonium phosphate system and production technique for producing diammonium phosphate with a single-tube reactor. The system comprises a granulator cylinder provided with a tube reactor and a granulator ammonificator spindle, wherein the granulator ammonificator spindle is provided with three ammonificator nozzles; one end of the front section of the tube reactor is positioned in the granulator cylinder, the other end of the front section of the tube reactor is connected with one end of the rear section of the tube reactor, the other end of the rear section of the tube reactor is connected with one end of a reaction chamber, the other end of the reaction chamber is provided with an NH3 inlet, and the side wall of the reaction chamber is provided with a CPA inlet; and the front section of the tube reactor is provided with two bar-like tube reactor nozzles. The diammonium phosphate is produced according to the existing double-tube production technique, but the addition amount of the ammonificator ammonia is only 40-50% of the existing ammonia addition amount; and the washing solution is directly added into an acid tank instead of the tube reactor to prepare the acid for the tube reactor. The production system overcomes the defects of the existing system under the condition of lack of phosphorus resources, adapts to the actual state of the existing concentrated acid, and improves the apparent defects of the product.
Description
Technical field
The invention belongs to the multiple fertile production technical field of phosphorus, relate to a kind of device of production diammonium phosphate, be specifically related to the anti-production diammonium phosphate of a kind of single tube system; The invention still further relates to a kind of production technique of utilizing this system's production diammonium phosphate.
Background technology
AZF technology is the technology of the production high-concentration compound fertilizer-diammonium phosphate of France's exploitation in last century, and this technology is widely used both at home and abroad, adopts two-tube production diammonium phosphate in the AZF technology, has returning charge than the advantage low, that power consumption is low.Because acid is dense, the influence of sour matter, also there is following deficiency in this two-tube production system in the actual production process: 1) high to SPA concentration and specification of quality, specific targets are: P
2O
5>=50%, SO
3≤3.3%, solid content 0.22～0.3%; Fe
2O
3: 1.1～2%; Al
2O
3: 0.9～2.1%; MgO:0.25～1.3%; 2) two-tube physical properties different (the GPR medium is that medium is a powdery under slip, the DPR normal circumstances) of regurgitating out medium makes system product granularity, the bad control of returning charge amount systematic water balance to be impacted; 3) drying machine, tablets press are prone to bonding; 4) the drying machine pipe instead influences because of system temperature when initially feeding intake, and charging time seriously lags behind; 5) two-tube reciprocal cross is big for fouling cleaning difficulty, and effective production time is few; 6) granulating system ammonia spillage is big, and the washing system load is bigger.
And deficient gradually along with domestic phosphor resource will guarantee more than 50% as the raw-material SPA concentration of production diammonium phosphate, for numerous domestic has the enterprise of phosphor resource, almost can't not realize, also more and more cannot.Adopt the enterprise of AZF explained hereafter diammonium phosphate more to have difficulty in taking a step.If reduce SPA concentration, then can cause to have a strong impact on to systematic water balance, ammonia recovery and the performance of enterprises, also can cause environmental pollution simultaneously.Therefore, it also is imperative this technology being transformed.
Summary of the invention
In order to overcome the problem that exists in the above-mentioned prior art, the purpose of this invention is to provide the anti-production diammonium phosphate of a kind of single tube system, can solve the problem that exists in the prior art with concentration and the lower phosphoric acid production diammonium phosphate of quality.
Another object of the present invention provides a kind of production technique of utilizing said system production diammonium phosphate.
For realizing above-mentioned purpose; The technical scheme that the present invention adopted is: the anti-production diammonium phosphate of a kind of single tube system; Comprise the tablets press cylindrical shell, be provided with anti-device of pipe and tablets press ammoniator main shaft on the tablets press cylindrical shell side by side, three ammoniator nozzles are installed on the tablets press ammoniator main shaft successively; Manage anti-device and tablets press ammoniator main shaft and all be positioned at the top of tablets press tubular axis, the fixed installation of tablets press ammoniator main shaft; Managing anti-device is made up of pipe reactor leading portion that joins successively and pipe reactor back segment; One end of pipe reactor leading portion is positioned at the tablets press cylindrical shell; The other end of pipe reactor leading portion stretches out outside the tablets press cylindrical shell; And be connected with an end of pipe reactor back segment, the other end of pipe reactor back segment is connected with an end of reaction chamber, and the other end of reaction chamber is equipped with NH
3Import, the sidewall of reaction chamber is provided with the CPA import; On the sidewall of tubular reactor leading portion, along be provided with the first anti-device nozzle of pipe and the anti-device nozzle of second pipe successively away from pipe reactor back segment direction, the first anti-device nozzle of pipe and the anti-device nozzle of second pipe are bar hole.
Another technical scheme that the present invention adopted is: a kind of technology of utilizing the anti-production system production of above-mentioned single tube diammonium phosphate; Be specially: by existing two-tube production technique production diammonium phosphate; But the throwing amount of ammoniator ammonia is thrown 40～50% of ammonia amount for existing two-tube production technique; Washings is directly added acid tank be used for the anticaustic acid of preparation pipe, no longer add the anti-device of pipe.
The two-tube technology that the anti-production diammonium phosphate of single tube of the present invention system will have tablets press tubular reactor (GPR) and dryer tubular reactor (DPR) now changes the single tube technology of having only tablets press tubular reactor (GPR) into; Utilize concentration to be lower than 44～46% SPA production diammonium phosphate; Actual production capacity is unaffected; Visual appearancies such as also raising to some extent, and the granularity of product, mellow and full degree have had bigger improvement.Solved the problem that existing production system exists in production diammonium phosphate process.Can adapt to the deficient gradually contradiction of present domestic phosphor resource; The multiple fertile enterprise of phosphorus further developed provides development space; More help enterprises implement " quality is won victory " target, accomplish qualified discharge through related work simultaneously, have great significance reducing environmental pollution.
Description of drawings
Fig. 1 is the structural representation of existing two-tube anti-production system.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the anti-production system structural representation of single tube of the present invention.
Fig. 4 is the left view of Fig. 3.
Among the figure: 1. tablets press tubular reactor, 2.SCL import, 3.NH
3Import, 4.CPA import, 5. Venturi throat, 6. pipe reversed nozzle; 7. tablets press cylindrical shell, 8. tablets press ammoniator main shaft, 9. ammoniator first nozzle, 10. ammoniator second nozzle; 11. ammoniator the 3rd nozzle, 12. reaction chambers, 13. pipe reactor back segments; 14. the pipe reactor leading portion, the anti-device nozzle of 15. first pipes, the anti-device nozzle of 16. second pipes.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
As depicted in figs. 1 and 2; The structure of existing two-tube anti-production diammonium phosphate system; The tablets press cylindrical shell 7 and tablets press ammoniator main shaft 8 that comprise coaxial setting; Tablets press ammoniator main shaft 8 can rotate around himself axis, and stretch out from the two ends of tablets press cylindrical shell 7 respectively at the two ends of tablets press ammoniator main shaft 8; Tablets press ammoniator main shaft 8 is provided with the ammonification organ pipe, and the first ammoniator nozzle 9, the second ammoniator nozzle 10 and the 3rd ammoniator nozzle 11 are installed on this ammonification organ pipe side by side, and these three ammoniator nozzles all are positioned at tablets press cylindrical shell 7.Also be provided with tablets press tubular reactor 1 (GPR) and dryer tubular reactor (DPR) on the end face of tablets press cylindrical shell 7; Tablets press tubular reactor 1 laterally arranges with tablets press ammoniator main shaft 8; Manage anti-device 1 and be positioned at the top of tablets press ammoniator main shaft 8; One end of tablets press tubular reactor 1 is positioned at tablets press cylindrical shell 7, and this end is provided with pipe reversed nozzle 6; The other end of tablets press tubular reactor 1 is positioned at outside the tablets press cylindrical shell 7, on this end end face SCL import 2 is installed; Venturi throat 5 is installed on the tablets press tubular reactor 1, and the anti-device 1 of the pipe between Venturi throat 5 and the SCL import 2 is provided with NH
3Import 3 and CPA import 4.
The degree of neutralization of two-tube production system tablets press tubular reactor 1 is 1.4～1.5, the degree of neutralization of dryer tubular reactor (DPR) is 1.0～1.1.The normal ejection of dryer tubular reactor be powdery monoammonium phosphate, through the formation returning charge of dry back, to reach final tablets press outlet material degree of neutralization be 1.78～1.8 in the ammoniator secondary ammonification ammonification of the process insertion bed of material in tablets press.
Adopting above-mentioned existing two-tube production system when the production diammonium phosphate, must the phosphoric acid of working concentration more than 50% be raw material, under the deficient gradually situation of phosphor resource, is difficult to produce qualified diammonium phosphate; If adopt the lower phosphoric acid of concentration, then can cause to have a strong impact on to water balance, ammonia recovery and the performance of enterprises of system, also can pollute simultaneously environment.And dryer tubular reactor influences because of system temperature when initially feeding intake, and charging time seriously lags behind; It is big that two-tube reactor drum replaces fouling cleaning difficulty, and effective production time is few; Granulating system ammonia escaped quantity is big, and the washing system load is bigger.
In order to overcome the problem that exists in the above-mentioned prior art; The invention provides a kind of structure such as Fig. 3 and the anti-production diammonium phosphate of single tube system shown in Figure 4, relatively low to the specification of quality of raw material SPA, can adapt to the actual state that has SPA now; Flexibility is stronger, and production capacity increases; Visual appearance such as product granularity, mellow and full degree has had bigger improvement.This production system comprises tablets press cylindrical shell 7; Be provided with anti-device 1 of pipe and tablets press ammoniator main shaft 8 on the tablets press cylindrical shell 7 side by side; Manage anti-device 1 axis and tablets press ammoniator main shaft 8 axis all parallel with tablets press cylindrical shell 7 axis; Manage anti-device 1 and tablets press ammoniator main shaft 8 and all be positioned at the top of tablets press cylindrical shell 7 axis, tablets press ammoniator main shaft 8 is fixed; Manage anti-device 1 and be made up of pipe reactor leading portion that joins successively 14 and pipe reactor back segment 13, the length of tubular reactor back segment 13 is 1300mm; One end of pipe reactor leading portion 14 is positioned at tablets press cylindrical shell 7; The other end of pipe reactor leading portion 14 stretches out outside the tablets press cylindrical shell 7; And be connected with an end of pipe reactor back segment 13, the other end of pipe reactor back segment 13 is connected with an end of reaction chamber 12, and the other end of reaction chamber 12 is equipped with NH
3Import 3, the sidewall of reaction chamber 12 is provided with CPA import 4; On the sidewall of tubular reactor leading portion 14, along be provided with the first anti-device nozzle 15 of pipe and the anti-device nozzle 16 of second pipe successively away from pipe reactor back segment 13 directions; The first anti-device nozzle 15 of pipe and the anti-device nozzle 16 of second pipe are bar hole, and the axis of the axis of this bar hole and pipe reactor leading portion 14 parallels; End face and the distance of the first anti-device nozzle 15 of pipe between pipe reactor back segment 13 1 ends that pipe reactor leading portion 14 stretches out tablets press cylindrical shell 7 one ends are 1000mm; Distance between the first anti-device nozzle 15 of pipe and the anti-device nozzle 16 of second pipe is 900mm; Tablets press ammoniator main shaft 8 is fixed, and the first ammoniator nozzle 9, the second ammoniator nozzle 10 and the 3rd ammoniator nozzle 11 are installed on the tablets press ammoniator main shaft 8 side by side; Distance between the end face of the first ammoniator nozzle 9 and tablets press cylindrical shell orientating reaction chambers 12 7 is 1900mm; Distance between the first ammoniator nozzle 9 and the second ammoniator nozzle 10 is 1200mm; Distance between the second ammoniator nozzle 10 and the 3rd ammoniator nozzle 11 is 1200mm.
Production system of the present invention is the basis with existing two-tube anti-production system, with the two-tube single tube that changes into of original tablets press tubular reactor (GPR) and dryer tubular reactor (DPR); Remove dryer tubular reactor, and the tablets press tubular reactor is transformed, adopt the anti-production diammonium phosphate of single tube.To have circular one-jet tablets press tubular reactor simultaneously and change tablets press tubular reactor into two long strip shape nozzles; Remove Venturi throat 5 again.Change rotating ammoniator crossbeam into fixed, be convenient to install the tablets press tubular reactor of twin nipple, thickening ammoniator steel plate is avoided the ammoniator fracture, to reduce the influence to producing.
The degree of neutralization of slip in tablets press of the anti-production system tablets press of single tube of the present invention tubular reactor 1 ejection is 1.4～1.5, reaches standard compliant phosphorus ammonium through tablets press ammoniator secondary ammoniation.The logical ammonia amount of tablets press ammoniator will be less than the logical ammonia amount in the existing two-tube production system in this production system.That is to say two-tube changing into behind the single tube owing to do not had powdery monoammonium phosphate in the system, make the logical ammonia amount of the logical ammonia amount of ammoniator when two-tube reduce 40～50%, can reach final tablets press outlet material degree of neutralization and be 1.78～1.8 requirement.
The present invention also provides a kind of technology of utilizing the anti-production system production of above-mentioned single tube diammonium phosphate; Be specially: by existing two-tube production technique production diammonium phosphate; But the throwing amount of ammoniator ammonia is 40～50% of original throwing ammonia amount; Washings is directly added acid tank be used for the anticaustic acid of preparation pipe, no longer directly add the anti-device of pipe.
The anti-production technique of single tube is to the specification of quality (quality percentage composition) of SPA:
P
2O
5：44～46%；
SO
3：≤5.5%；
Solid content :≤1.5% (normally being 0.8～1.2%)
Fe
2O
3:0.8～1.0%；Al
2O
3:0.9～1.3%；MgO:1.7～2.0%。
The anti-production diammonium phosphate of single tube of the present invention system reaches the purpose of system loading through dimensions, nozzle location and the transformation ammoniator of the anti-device nozzle of adjustment pipe, and is different from the anti-technology of single tube of original design.Not only the anti-device of structure, length, nozzle form, nozzle quantity, the pipe position of the anti-device of pipe in the existing two-tube production system is changed, manage anti-size and specification and confirm according to device capability, stronger to system's specific aim.And will turn ammoniator and change eccentric fixed sturcture into, be convenient to manage anti-installation and fixing, with further performance system production capacity.Cancelled dryer tubular reactor simultaneously.Through transforming two-tube reacted is reduced to single tube production, especially manage anti-device transformation make the anti-device structure of pipe more rationally, material reaction is more abundant, owing to use the twin nipple whitewashing, the whitewashing position is reasonable simultaneously, the throwing amount improves.And because the anti-device of pipe is fixed on the ammoniator crossbeam not fragilely, ammoniator is also more reliable, has avoided in the past ammoniator often to be squeezed distortion or bends and eject the WS and production is impacted.This single tube production system structure is simpler, and the throwing amount of ammoniator ammonia is merely 40～50% of original throwing ammonia amount, and washings directly adds acid tank and is used for the anticaustic acid of preparation pipe, no longer directly adds and manages anti-device.
With the following SPA of the quality percentage composition of staple is raw material: P
2O
5Be 44%; SO
3Be 5.5%; Solid content is 0.8%; Fe
2O
3Be 1.0%; Al
2O
3Be 1.1%; MgO is 1.7%.Adopt the anti-production system of single tube of the present invention, by existing two-tube production technique production diammonium phosphate, but the throwing amount of ammoniator ammonia is 40% of the ammonia amount of throwing in the two-tube production technique, washings is directly added acid tank be used for the anticaustic acid of preparation pipe, no longer directly adds the anti-device of pipe; Produce product.
Through detecting, it part is 64.1% that this product total supports, and wherein nitrogen is 18%, Vanadium Pentoxide in FLAKES is 46.1%, water is 2.2%.Prove that this product is exactly a diammonium phosphate, explain that the anti-production system of single tube of the present invention can be lower than 50% phosphoric acid production with concentration and go out qualified diammonium phosphate.And granularity is that the particle of 2～4mm accounts for 93.3% in this diammonium phosphate.The diammonium phosphate that adopts production system production of the present invention is described, and not only inner quality is up to standard, and visual appearancies such as granularity, mellow and full degree have also had bigger improvement.
Comparative Examples 1
With the SPA among the embodiment 1 is raw material, adopts existing two-tube production system, produces with existing production technique, obtains corresponding product.
Through detecting, the Specifeca tion speeification of this product all can not reach the index of qualified diammonium phosphate; Explain that it is the diammonium phosphate of the qualified nutrient of raw material production that existing two-tube production system cannot be lower than 50% SPA with concentration.
With the following SPA of the quality percentage composition of staple is raw material: P
2O
5Be 46%; SO
3Be 3%; Solid content is 1.2%; Fe
2O
3Be 0.9%; Al
2O
3Be 0.9%; MgO is 1.85%.Adopt the anti-production system of single tube of the present invention, by existing two-tube production technique production diammonium phosphate, but the throwing amount of ammoniator ammonia is 50% of a two-tube production technique throwing ammonia amount, washings is directly added acid tank be used for the anticaustic acid of preparation pipe, no longer directly adds the anti-device of pipe; Produce product.
Through detecting, it part is 64.4% that this product total supports, and wherein nitrogen is 18%, Vanadium Pentoxide in FLAKES is 46.4%, water is 1.9%.Prove that this product is exactly a diammonium phosphate, explain that production system of the present invention can be lower than 50% phosphoric acid production with concentration and go out qualified diammonium phosphate.And granularity is that the particle of 2～4mm accounts for 92.4% in this diammonium phosphate.Explain that visual appearancies such as the granularity of the diammonium phosphate that adopts the anti-production system production of single tube of the present invention, mellow and full degree have had bigger improvement.
Comparative Examples 2
With the SPA among the embodiment 2 is raw material, adopts existing two-tube production system, produces with existing production technique, obtains corresponding product.
Through detecting, the Specifeca tion speeification of this product can not reach and have qualified foster part diammonium phosphate.It is the diammonium phosphate of the qualified nutrient of raw material production that the existing two-tube production system of proof cannot be lower than 50% SPA with concentration.
With the following SPA of the quality percentage composition of staple is raw material: P
2O
5Be 45%; SO
3Be 2%; Solid content is 1.0%; Fe
2O
3Be 1.0%; Al
2O
3Be 1.3%; MgO is 2.0%.Adopt the anti-production system of single tube of the present invention, by existing two-tube production technique production diammonium phosphate, but the throwing amount of ammoniator ammonia is thrown 45% of ammonia amount for existing two-tube production technique, washings is directly added acid tank be used for the anticaustic acid of preparation pipe, no longer directly adds the anti-device of pipe; Produce product.
Through detecting, it part is 64.1% that this product total supports, and wherein nitrogen is 18.1%, Vanadium Pentoxide in FLAKES is 46.0%, water is 1.8%.Prove that this product is exactly a diammonium phosphate, explain that production system of the present invention can go out qualified diammonium phosphate with the lower phosphoric acid production of concentration.And granularity is that the particle of 2～4mm accounts for 92.0% in this diammonium phosphate.Explain that visual appearancies such as the granularity of the diammonium phosphate that adopts production system production of the present invention, mellow and full degree have had bigger improvement.
Comparative Examples 3
With the SPA among the embodiment 3 is raw material, adopts existing two-tube production system, produces with existing production technique, obtains corresponding product.
Through detecting, the Specifeca tion speeification of this product can not reach the index of qualified nutrient diammonium phosphate, explain to have two-tube production system now cannot to be lower than 50% SPA with concentration be the diammonium phosphate of the qualified nutrient of raw material production.
Claims (7)
1. the anti-production diammonium phosphate of single tube system; Comprise tablets press cylindrical shell (7); Be provided with pipe anti-device (1) and tablets press ammoniator main shaft (8) on the tablets press cylindrical shell (7) side by side, three ammoniator nozzles are installed on the tablets press ammoniator main shaft (8) successively, it is characterized in that; Manage anti-device (1) and tablets press ammoniator main shaft (8) and all be positioned at the top of tablets press cylindrical shell (7) axis, tablets press ammoniator main shaft (8) fixed installation; Managing anti-device (1) is made up of pipe reactor leading portion (14) that joins successively and pipe reactor back segment (13); One end of pipe reactor leading portion (14) is positioned at tablets press cylindrical shell (7); The other end of pipe reactor leading portion (14) stretches out outside the tablets press cylindrical shell (7); And be connected with an end of pipe reactor back segment (13), the other end of pipe reactor back segment (13) is connected with an end of reaction chamber (12), and the other end of reaction chamber (12) is equipped with NH
3Import (3), the sidewall of reaction chamber (12) is provided with CPA import (4); On the sidewall of tubular reactor leading portion (14), along be provided with the first pipe anti-device nozzle (15) and the second pipe anti-device nozzle (16) successively away from pipe reactor back segment (13) direction, the first pipe anti-device nozzle (15) and the second anti-device nozzle of pipe (16) are bar hole.
2. the anti-production diammonium phosphate of single tube as claimed in claim 1 system is characterized in that, the axis of the axis of the said first anti-device nozzle of pipe (15) and the second anti-device nozzle of pipe (16) all parallels with the axis of pipe reactor leading portion (14).
3. according to claim 1 or claim 2 the anti-production diammonium phosphate of single tube system is characterized in that, the distance that the said first pipe anti-device nozzle (15) and second is managed between the anti-device nozzle (16) is 900mm.
4. the anti-production diammonium phosphate of single tube as claimed in claim 1 system is characterized in that the length of said tubular reactor back segment (13) is 1300mm; End face and the distance of the first pipe anti-device nozzle (15) between pipe reactor back segment (13) one ends that pipe reactor leading portion (14) stretches out tablets press cylindrical shell (7) one ends are 1000mm.
5. the anti-production diammonium phosphate of single tube as claimed in claim 1 system; It is characterized in that the distance in three ammoniator nozzles that said tablets press ammoniator main shaft (8) is upward installed between the end face of the ammoniator nozzle of orientating reaction chamber (12) and tablets press cylindrical shell (7) orientating reaction chamber (12) is 1900mm; Distance between adjacent two ammoniator nozzles is 1200mm.
6. technology of utilizing the anti-production diammonium phosphate of the said single tube of claim 1 system production diammonium phosphate; It is characterized in that; This production technique is specially: by existing two-tube production technique production diammonium phosphate; But the throwing amount of ammoniator ammonia directly adds acid tank with washings and is used for the anticaustic acid of preparation pipe for throwing 40～50% of ammonia amount in the existing production technique, no longer adds the anti-device of pipe.
7. production technique as claimed in claim 6 is characterized in that, the quality percentage composition matter requirement to SPA in the said production technique is:
P
2O
5；44～46%；
SO
3≤5%；
Solid content≤1.5%;
Fe
2O
3:0.8～1.0%；Al
2O
3:0.9～1.3%；MgO:1.7～2.0%。
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|---|---|---|---|
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|---|---|---|---|
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| CN102674904B CN102674904B (en) | 2013-11-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103664239A (en) * | 2013-11-29 | 2014-03-26 | 安徽六国化工股份有限公司 | Gunite pelleting machine for producing diammonium phosphate |
| CN104860283A (en) * | 2015-04-17 | 2015-08-26 | 湖北六国化工股份有限公司 | Granulator comprising double tubular reactors and application thereof in diammonium phosphate production |
| CN107473193A (en) * | 2017-09-12 | 2017-12-15 | 甘肃瓮福化工有限责任公司 | A kind of method of system and production Diammonium phosphate (DAP) from heated drying production Diammonium phosphate (DAP) |
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|---|---|---|---|---|
| US4134750A (en) * | 1977-07-25 | 1979-01-16 | Tennessee Valley Authority | Granular ammonium phosphate sulfate and urea-ammonium phosphate sulfate using a common pipe-cross reactor |
| CN1807367A (en) * | 2006-01-27 | 2006-07-26 | 许洪兴 | Tubular reactor for sulfuric acid and ammonia |
| CN1986042A (en) * | 2005-12-21 | 2007-06-27 | 中国-阿拉伯化肥有限公司 | Improved tubular reactor |
| CN101391934A (en) * | 2008-10-24 | 2009-03-25 | 江苏阿波罗复合肥有限公司 | Ammoniation granulator and composite fertilizer production novel technique |
| CN101723340A (en) * | 2009-12-29 | 2010-06-09 | 中国海洋石油总公司 | Preparation method of diammonium phosphate |
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2012
- 2012-05-18 CN CN 201210154931 patent/CN102674904B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4134750A (en) * | 1977-07-25 | 1979-01-16 | Tennessee Valley Authority | Granular ammonium phosphate sulfate and urea-ammonium phosphate sulfate using a common pipe-cross reactor |
| CN1986042A (en) * | 2005-12-21 | 2007-06-27 | 中国-阿拉伯化肥有限公司 | Improved tubular reactor |
| CN1807367A (en) * | 2006-01-27 | 2006-07-26 | 许洪兴 | Tubular reactor for sulfuric acid and ammonia |
| CN101391934A (en) * | 2008-10-24 | 2009-03-25 | 江苏阿波罗复合肥有限公司 | Ammoniation granulator and composite fertilizer production novel technique |
| CN101723340A (en) * | 2009-12-29 | 2010-06-09 | 中国海洋石油总公司 | Preparation method of diammonium phosphate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103664239A (en) * | 2013-11-29 | 2014-03-26 | 安徽六国化工股份有限公司 | Gunite pelleting machine for producing diammonium phosphate |
| CN104860283A (en) * | 2015-04-17 | 2015-08-26 | 湖北六国化工股份有限公司 | Granulator comprising double tubular reactors and application thereof in diammonium phosphate production |
| CN107473193A (en) * | 2017-09-12 | 2017-12-15 | 甘肃瓮福化工有限责任公司 | A kind of method of system and production Diammonium phosphate (DAP) from heated drying production Diammonium phosphate (DAP) |
| CN107473193B (en) * | 2017-09-12 | 2020-12-15 | 甘肃瓮福化工有限责任公司 | System for producing diammonium phosphate by self-heating drying and method for producing diammonium phosphate |
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| Publication number | Publication date |
|---|---|
| CN102674904B (en) | 2013-11-06 |
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