CN215963439U

CN215963439U - Granulating device for diammonium phosphate

Info

Publication number: CN215963439U
Application number: CN202121316522.4U
Authority: CN
Inventors: 刘银旭; 郭锐; 朱月; 徐国涛; 张双武; 黎国华; 王东莲; 张元堂
Original assignee: Hubei Yihua Fertilizer Co ltd
Current assignee: Hubei Yihua Fertilizer Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-03-08
Anticipated expiration: 2031-06-11

Abstract

The utility model discloses a granulating device of diammonium phosphate. The device comprises a granulator, two gas ammonia tubular reactors and two gas ammonia distributors, wherein the two gas ammonia tubular reactors extend into the granulator from two opposite ends of the granulator respectively, the two gas ammonia distributors are arranged in the granulator, and spray heads of the gas ammonia distributors are inserted into a material bed of the granulator. The time for generating diammonium phosphate slurry by the reaction of ammonia and phosphoric acid is shortened, the generation of double salt in the ammonium phosphate slurry is reduced, the content of effective nutrients in diammonium phosphate is improved, and the operation period of the gas-ammonia tubular reactor is prolonged; the neutralization degree of the slurry is adjusted by supplementing ammonia, and the granulation balling rate is greatly improved, so that the scabbing probability of a granulator is reduced, and the roundness of diammonium phosphate granules is improved; the process flow is simplified, the water content of the reaction slurry is low, and the quality is easier to control; the method can also utilize the gas ammonia produced by synthetic ammonia nearby, effectively improve the economic efficiency and reduce the power consumption of unit products.

Description

Granulating device for diammonium phosphate

Technical Field

The utility model relates to the technical field of ammonium phosphate fertilizer production, in particular to a granulating device of diammonium phosphate.

Background

The main raw materials of ammonium phosphate are ammonia and phosphoric acid. 3 hydrogen ions in phosphoric acid react with ammonia to generate monoammonium phosphate, diammonium phosphate and triammonium phosphate. In the reaction process, the proportion of the ammonia participating in the reaction is different, the proportion of the obtained diammonium phosphate and the monoammonium phosphate is also different, and the properties of the slurry are different.

The existing 24-million-ton/year diammonium phosphate device, the preneutralization reaction tank and tubular reactor mixing process cannot meet the expected productivity and quality requirements, the appearance of the produced product has defects, and the production energy consumption is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a granulating device of diammonium phosphate, aiming at the defects in the prior art.

The granulating device for diammonium phosphate comprises a granulator, two ammonia gas tubular reactors and two ammonia gas distributors, wherein the two ammonia gas tubular reactors respectively extend into the granulator from two opposite ends of the granulator and are arranged in the granulator in a suspended manner, the two ammonia gas distributors are arranged in the granulator, and spray heads of the two ammonia gas distributors are inserted into a material bed of the granulator.

Furthermore, the two gas ammonia tubular reactors and the two gas ammonia distributors are fixed through a mounting mechanism and are arranged in the granulator in a suspended manner.

Further, the installation mechanism comprises a middle beam and two support frames, the two support frames are respectively arranged outside two ends of the granulator, two ends of the middle beam are fixed on the support frames and penetrate through the inside of the granulator, a first hanging frame is detachably arranged on the middle beam, the first hanging frame is provided with two first hoops, and the guniting pipelines of the two gas ammonia tubular reactors are arranged in the first hoops in a one-to-one correspondence manner.

Furthermore, a second hanging bracket is detachably arranged on the middle beam, two second hoops are hung on the second hanging bracket, and the two gas ammonia distributors are correspondingly arranged in the second hoops.

Furthermore, the spray heads of the two gas ammonia tubular reactors are 650mm away from the material bed of the granulator,

furthermore, a spray head of the gas ammonia tubular reactor is a solid conical inner cross spiral spray nozzle.

Furthermore, the spray heads of the two gas ammonia distributors are on the same straight line, and the distance is 1350 mm.

The utility model has the following beneficial effects:

(1) according to the utility model, the two gas ammonia tubular reactors are arranged in the granulator, and the reaction of ammonia and phosphoric acid is carried out in the gas ammonia tubular reactors, so that the time for generating diammonium phosphate by the reaction of ammonia and phosphoric acid is shortened, the generation of double salts in ammonium phosphate slurry is reduced, the content of effective nutrients in diammonium phosphate is improved, and the operation period of the gas ammonia tubular reactors is prolonged; meanwhile, the two gas ammonia distributors feed slurry to supplement ammonia, the neutralization degree is adjusted, the granulation balling rate is greatly improved, the particle strength is high, and the particles can fully roll in the granulator, so that the scabbing probability of the granulator is reduced, and the roundness of diammonium phosphate particles is improved;

(2) no neutralization tank and a slurry conveying system are arranged, the flow is simplified, the water content of reaction slurry is low,

the material return ratio of the granulation and the whole system can be reduced to 3.5:1, and the quality is easier to control;

(3) the production method adopts direct feeding of gas ammonia, can effectively control and adjust the neutralization degree, improves the production efficiency, can also utilize the gas ammonia produced by synthetic ammonia nearby, effectively improves the economic efficiency and has low power consumption of unit products.

Drawings

FIG. 1 is a schematic structural diagram of a granulating apparatus for diammonium phosphate according to the present invention;

FIG. 2 is a schematic structural diagram of the mounting mechanism of the present invention.

1. A granulator; 2. a gas ammonia tubular reactor; 21. a guniting pipeline of the gas ammonia tubular reactor; 22. a spray head of the gas ammonia tubular reactor; 3. a gas ammonia distributor; 31. a spray head of the gas ammonia distributor; 4. an installation mechanism; 41. a middle beam; 42. a support frame; 411. a first hanger; 4111. a first hoop; 412. a second hanger; 4121. and a second hoop.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the granulating apparatus for diammonium phosphate of the present invention includes a granulator 1, two ammonia gas tubular reactors 2 and two ammonia gas distributors 3, wherein the two ammonia gas tubular reactors 2 respectively extend into the granulator 1 from two opposite ends of the granulator 1 and are suspended in the granulator 1, the two ammonia gas distributors 3 are disposed in the granulator 1, and spray heads 31 of the two ammonia gas distributors are inserted into a material bed of the granulator 1. The slurry produced by the reaction of ammonia and phosphoric acid in the two gas ammonia tubular reactors 2 is sprayed in the granulator 1 to form diammonium phosphate particles, so that the time for generating diammonium phosphate by the reaction of ammonia and phosphoric acid is shortened, the generation of double salts in ammonium phosphate slurry is reduced, the content of effective nutrients in diammonium phosphate is improved, and the operation period of the gas ammonia tubular reactors is prolonged; meanwhile, the two gas ammonia distributors 3 supplement ammonia for the slurry, the neutralization degree is adjusted, the granulation balling rate is greatly improved, the particle strength is high, and the particles can fully roll in the granulator, so that the scabbing probability of the granulator is reduced, and the roundness of diammonium phosphate particles is improved; compared with a device before transformation, the device has no pre-neutralization tank and a slurry conveying system, the process flow is simplified, the water content of reaction slurry is low, the granulation and material returning ratio of the whole system can be reduced to 3.5:1, and the quality is easier to control; and the production is directly carried out by adopting the gas ammonia, so that the production efficiency is improved, the gas ammonia produced by the synthetic ammonia can be utilized nearby, the economic efficiency is effectively improved, and the power consumption of unit products is low.

The two gas ammonia tubular reactors 2 and the two gas ammonia distributors 3 may be installed in a variety of ways, in this embodiment, as shown in fig. 2, the two gas ammonia tubular reactors 2 and the two gas ammonia distributors 3 may be suspended inside the pelletizer 1 through an installation mechanism 4, the installation mechanism 4 may have a variety of structures, which are not limited herein, in this embodiment, the installation mechanism 4 may include a middle beam 41 and two support frames 42, the two support frames 42 are respectively disposed outside two ends of the pelletizer 1, two ends of the middle beam 41 are fixed on the support frames 42, and penetrate through the inside of the pelletizer 1, the middle beam 41 may be detachably provided with a first hanger 411, the first hanger 411 is respectively hung with two first anchor ears 4111, and the slurry spraying pipes 21 of the two gas ammonia tubular reactors are correspondingly disposed inside the first anchor ears 4111 one by one. In order to facilitate maintenance of workers, the middle beam 41 can be detachably provided with a second hanger 412, the second hangers 412 are respectively provided with two second hoops 4121, and the two gas ammonia distributors 3 are correspondingly arranged in the second hoops 4121. The mounting mechanism 4 is an important construction for fixing the two gas ammonia tubular reactors 2 and the two gas ammonia distributors 3, so that the two gas ammonia tubular reactors 2 and the two gas ammonia distributors 3 are fixed firmly and are not deformed, and further, the granulation is ensured to be uniform in dry and wet conditions, and the granules are uniform in thickness.

In order to improve the spraying atomization effect, make the granulation dry and wet evenly, the spraying coating effect is good, reduce the scab, the position of the spray head 22 of two gas ammonia tubular reactors can be designed to be 650mm away from the material bed of the granulator 1, the spray head 22 of the gas ammonia tubular reactor can also be designed to be a solid cone inner cross spiral nozzle, the solid cone inner cross spiral nozzle realizes the high-flow spraying through the least flow obstruction, the formed liquid drop particles are relatively large, the slurry coating is even, and the granulation balling rate of the diammonium phosphate is improved.

In order to prevent the diammonium phosphate particles from being high in water content, low in neutralization degree, low in particle strength and rough in surface, the spray heads 31 of the two gas-ammonia distributors can be arranged on the same straight line, the distance is 1350mm, the condition that scabs generated inside cannot be discharged is effectively reduced by a sufficient distance, and the particles are prevented from being deformed due to rolling.

The above is not relevant and is applicable to the prior art.

While certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing is illustrative only and is not limiting of the scope of the utility model, as various modifications or additions may be made to the specific embodiments described and substituted in a similar manner by those skilled in the art without departing from the scope of the utility model as defined in the appending claims. It should be understood by those skilled in the art that any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. A granulation device of diammonium phosphate is characterized in that: including granulator (1), two gas ammonia tubular reactor (2) and two gas ammonia distributors (3), two gas ammonia tubular reactor (2) respectively by granulator (1) relative both ends stretch into in granulator (1), and unsettled setting is in the inside of granulator (1), two gas ammonia distributor (3) set up in granulator (1), shower nozzle (31) of two gas ammonia distributors all insert the material bed the inside of granulator (1).

2. A granulation apparatus for diammonium phosphate as defined in claim 1, wherein: the two gas ammonia tubular reactors (2) and the two gas ammonia distributors (3) are fixed through a mounting mechanism (4) and are arranged in the granulator (1) in a suspended manner.

3. A granulation apparatus for diammonium phosphate as defined in claim 2, wherein: the installation mechanism (4) comprises a middle beam (41) and two support frames (42), wherein the two support frames (42) are respectively arranged outside two ends of the granulator (1), two ends of the middle beam (41) are fixed on the support frames (42) and penetrate through the inside of the granulator (1), a first hanging frame (411) is detachably arranged on the middle beam (41), the first hanging frame (411) is provided with two first hoops (4111) in a hanging manner, and the slurry spraying pipelines (21) of the two gas ammonia tubular reactors are correspondingly arranged in the first hoops (4111) one by one.

4. A granulation apparatus for diammonium phosphate as defined in claim 3, wherein: the middle beam (41) is detachably provided with a second hanging bracket (412), the second hanging bracket (412) is provided with two second hoops (4121) in a hanging manner, and the two gas ammonia distributors (3) are arranged in the second hoops (4121) in a one-to-one correspondence manner.

5. A granulation apparatus for diammonium phosphate as defined in claim 3, wherein: the spray heads (22) of the two gas ammonia tubular reactors were 650mm from the bed of the granulator.

6. A granulation apparatus for diammonium phosphate as defined in claim 5, wherein: the spray head (22) of the gas ammonia tubular reactor is a solid conical inner cross spiral nozzle.

7. A granulation apparatus for diammonium phosphate as defined in claim 4, wherein: the spray heads (31) of the two gas ammonia distributors are on the same straight line, and the distance between the spray heads is 1350 mm.