CN110723999B - Equipment and method suitable for improving water solubility of trace elements in trace element ammonium phosphate product - Google Patents

Equipment and method suitable for improving water solubility of trace elements in trace element ammonium phosphate product Download PDF

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Publication number
CN110723999B
CN110723999B CN201911137864.7A CN201911137864A CN110723999B CN 110723999 B CN110723999 B CN 110723999B CN 201911137864 A CN201911137864 A CN 201911137864A CN 110723999 B CN110723999 B CN 110723999B
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shearing
trace element
reaction tank
premixing
tail gas
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CN110723999A (en
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廖国刚
邓永达
郑映
钟炀
潘自立
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Wengfu Group Co Ltd
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Wengfu Group Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B7/00Fertilisers based essentially on alkali or ammonium orthophosphates

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  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

The invention discloses a device and a method suitable for improving the water solubility of trace elements in a trace element ammonium phosphate product, wherein the device comprises a trace element adding device, a premixing primary reaction device, a shearing dispersion secondary reaction device, and a corresponding conveying pump, a pipeline and a valve; the method comprises the steps of adding trace element raw materials into a trace element raw material bin, metering and adding the trace element raw materials into a premixing first-stage reaction tank, mixing the trace element raw materials with phosphoric acid-containing granulation tail gas washing liquid, and carrying out primary reaction under the action of a high-intensity stirrer; conveying the mixture into a shearing dispersion secondary reaction tank, shearing unreacted or reaction-generated precipitate under the action of a shearing disperser, and uniformly dispersing the precipitate in the solution; adding concentrated sulfuric acid to react with the trace element raw materials in the washing liquid, uniformly feeding the mixture into a tubular reactor, spraying slurry and granulating to produce qualified trace element ammonium phosphate products. The method can effectively reduce the interference of the microelement raw material on the control of the ammonium phosphate production process and furthest improve the water solubility of the microelement.

Description

Equipment and method suitable for improving water solubility of trace elements in trace element ammonium phosphate product
Technical Field
The invention relates to phosphorus compound fertilizer production, in particular to equipment for producing ammonium phosphate, and especially relates to equipment and a method for producing differentiated and customized microelement ammonium phosphate products.
Background
Currently, the traditional phosphate fertilizer products have severely excessive productivity and vigorous homogenization competition. Based on the practical production, the phosphorus chemical product of the phosphate fertilizer needs to be positioned and laid out again, so that the supply side reform of the phosphorus chemical product of the phosphate fertilizer is accelerated. The production of the trace element ammonium phosphate is a transformation and upgrading of the product, and the mass production of customized and differentiated products is a necessary path for the production of the ammonium phosphate. The addition of trace element raw materials tends to reduce the nitrogen and phosphorus pentoxide contents in the product, and meanwhile, the control difficulty of a production system is increased. In order to reduce the influence of trace elements on nitrogen and phosphorus nutrients in the original product, high-content oxide is generally adopted as a raw material, and in the production process, partial oxide reacts with phosphoric acid to form precipitate, so that the water solubility of the trace elements is greatly influenced.
Disclosure of Invention
The invention aims to provide equipment and a method suitable for improving the water solubility of trace elements (zinc, copper and manganese) in an ammonium phosphate product, and the problems are solved by designing, researching and adding corresponding devices and preparing reasonable trace element-phosphoric acid mixed solution for production through adjustment of control indexes.
The invention provides equipment suitable for improving the water solubility of trace elements (zinc, copper and manganese) in an ammonium phosphate product, which comprises a trace element adding device, a premixing primary reaction device, a shearing dispersion secondary reaction device, and a corresponding conveying pump, a pipeline and a valve;
The microelement adding device comprises a microelement raw material bin, an automatic control metering belt, a conveying lifting machine, a matched inlet and outlet chute and a matched distribution valve;
The premixing primary reaction device comprises a premixing primary reaction tank, a high-strength stirrer, a granulating tail gas washing liquid inlet pipe, a microelement raw material inlet pipe, a reaction tail gas exhaust pipe, a primary mixed liquid conveying pump, a matched conveying pipeline and a valve, wherein the premixing primary reaction tank is positioned at the lower part of the microelement adding device conveying lifter;
The shearing and dispersing secondary reaction device comprises high-speed shearing and dispersing equipment, a shearing and dispersing secondary reaction tank, a sulfuric acid inlet pipe, a secondary mixed liquid emulsifying pump, a matched conveying pipeline and a valve.
Preferably, the high-speed shearing and dispersing device is a shearing and dispersing machine, the rotating speed of a main shaft is 0-2900 r/min, a rotor rotating at high speed is utilized to generate strong shearing force, primary reaction mixed solution containing microelement raw materials enters a narrow and precise gap of the rotor, and the primary reaction mixed solution is subjected to forces such as centrifugation, extrusion, shearing, impact and the like, so that particles in the mixed solution are fully crushed and sheared, and the mixed solution with production requirements is obtained.
The method for improving the water solubility of the trace elements in the trace element (zinc, copper and manganese) ammonium phosphate product by using the equipment comprises the following steps:
(1) Addition of trace element raw materials
A. Checking the integrity of each trace element raw material bin, the premixing primary reaction tank and the shearing dispersion secondary reaction tank, checking the insulation condition of a device motor, checking whether the lubrication of each device is integrity, measuring insulation, and powering on;
b. And starting a microelement raw material lifting machine, starting a conveying belt, starting a microelement metering belt and turning to a remote control state.
C. Opening a valve of a granulation tail gas washing liquid conveying branch pipe, adding the granulation tail gas washing liquid from a granulation tail gas washing liquid sealing groove into the premixing first-stage reaction groove, and starting a high-speed stirrer when the liquid level of the granulation tail gas washing liquid submerges a stirring paddle; opening an air valve of an air pipe at the top of the premixing primary reaction tank to ensure that the reaction tank is kept in a micro negative pressure state; setting the adding amount of trace elements, adjusting the frequency of a proper motor, and stably adding trace element raw materials into the premixing primary reaction tank. Under the action of the stirrer, the microelement raw material and the phosphoric acid-containing granulation tail gas washing liquid undergo a preliminary reaction, and water vapor generated by the reaction is introduced into a washing system by an air pipe to participate in washing.
D. And continuously adding the granulating tail gas washing liquid and the trace element raw materials into the tank, after the liquid level of the primary premixing reaction tank reaches 80%, starting a primary mixed liquid conveying pump to convey the mixed liquid into the shearing dispersion secondary reaction tank, and regulating the flow to reach balance.
E. when the premix entering the second-stage shearing dispersion reaction tank passes through the shearing disperser, starting the shearing disperser to enable the particles in the premix to be sheared into finer particles and uniformly dispersed in the mixed solution; simultaneously, a sulfuric acid regulating valve is opened, and quantitative sulfuric acid is added into the shearing dispersion secondary reaction tank to react the sulfuric acid with particles in the mixed solution; the secondary reaction solution with more complete reaction and more uniform dispersion is conveyed into an acid preparing tank of a tubular reactor through an emulsifying pump to participate in slurry spraying granulation, and the ammonium phosphate product containing trace elements is produced.
In the method, the process indexes are controlled as follows:
concentration of phosphorus pentoxide in the granulation tail gas washing liquid: 40 to 47 percent
Granulation tail gas wash density: 1.52 g/ml-1.62 g/ml
The content of microelements in the product is 0.1-4%
Shearing particle size of shearing and dispersing equipment: less than or equal to 0.1mm
The water solubility of microelements is increased: 10% -25%.
The invention is to crush the precipitate of phosphate and add proper amount of sulfuric acid, which not only meets the production requirement, but also reduces the adverse factors brought to the control of the production process by adding a large amount of raw materials. The adoption of the equipment and the method can ensure the quality of the product, and simultaneously furthest improve the water solubility of the trace elements so as to ensure the fertilizer efficiency of the product, and simultaneously effectively reduce the interference of the trace element raw materials on the control of the ammonium phosphate production process.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1.2, 3, 4, automatic control metering belt; 5. a conveyor belt; 6. conveying the elevator; 7. premixing a primary reaction tank; 8. a premix delivery pump; 9. shearing and dispersing a secondary reaction tank; 10. an emulsion pump; 11. a high-speed stirrer; 12. shearing a disperser; a. b, c, d, and a trace element raw material bin.
Detailed Description
An apparatus and a method for improving the water solubility of trace elements in trace element (zinc, copper and manganese) ammonium phosphate products by a certain ammonium phosphate production device are taken as an example for producing zinc-containing granular monoammonium phosphate (Zn-GMAP):
the device comprises a zinc oxide adding device, a premixing primary reaction device, a shearing dispersion secondary reaction device and a corresponding conveying pump, a pipeline and a valve.
The zinc oxide adding device comprises a microelement raw material bin a, b, c, d, automatic control metering belts 1, 2,3 and4, a conveying belt 5, a conveying lifting machine 6, and a matched inlet and outlet chute and a matched distribution valve.
The premixing primary reaction device comprises a premixing primary reaction tank 7, a high-strength stirrer 11, a granulating tail gas washing liquid inlet pipe, a zinc oxide inlet chute, a reaction tail gas exhaust pipe, a primary mixed liquid conveying pump 8, a matched conveying pipeline and a valve, wherein the premixing primary reaction tank is positioned at the lower part of a conveying lifter of the zinc oxide adding device.
The shearing and dispersing two-stage reaction device comprises high-speed shearing and dispersing equipment 12, a two-stage reaction tank 9, a sulfuric acid inlet pipe, a two-stage mixed liquid emulsifying pump 10, and a matched conveying pipeline and a valve.
The high-speed shearing and dispersing equipment is a novel shearing and stirring equipment which is a shearing and dispersing machine 12, the rotating speed of a main shaft is 0-2900 r/min, a rotor rotating at a high speed is utilized to generate strong shearing force, primary reaction mixed solution containing microelement raw materials enters a narrow and precise gap of the rotor, and the primary reaction mixed solution is subjected to the forces of centrifugation, extrusion, shearing, impact and the like, so that particles in the mixed solution are fully crushed and sheared, and the mixed solution with production requirements is obtained.
The operation steps are as follows:
a. Checking the integrity of each trace element raw material bin (a, b, c, d), the premixing primary reaction tank 7 and the shearing dispersion secondary reaction tank 9, checking the insulation condition of a device motor, checking whether the lubrication of each device is integrity, notifying an electrician to measure insulation, and powering on;
b. And starting the microelement raw material lifting machine 6, starting the conveying belt 5, starting the microelement metering belts 1,2, 3 and 4 and turning to a remote control state.
C. Opening a valve of a granulation tail gas washing liquid conveying branch pipe, adding the granulation tail gas washing liquid from a granulation tail gas washing liquid sealing groove into the premixing first-stage reaction tank 7, and starting a high-speed stirrer 11 when the liquid level of the granulation tail gas washing liquid submerges a stirring paddle; opening an air valve of an air pipe at the top of the premixing primary reaction tank to ensure that the reaction tank is kept in a micro negative pressure state; setting the addition amount of zinc oxide, adjusting the proper motor frequency, and stably adding trace element raw materials into the premixing primary reaction tank 7. Under the action of the stirrer 11, zinc oxide and the phosphoric acid-containing granulation tail gas washing liquid undergo preliminary reaction to generate zinc phosphate precipitate, and water vapor generated by the reaction is introduced into a washing system by an air pipe to participate in washing.
D. And continuously adding the granulation tail gas washing liquid and zinc oxide into the tank, starting a first-stage mixed liquid conveying pump 8 to convey the mixed liquid into a shearing and dispersing second-stage reaction tank 9 after the liquid level of the premixing first-stage reaction tank 7 reaches 80%, and regulating the flow to reach balance.
E. When the premix entering the shear dispersion secondary reaction tank 9 passes through the shear disperser 12, the shear disperser 12 is started to enable the particles in the premix to be sheared into finer particles and uniformly dispersed in the mixture; simultaneously, a sulfuric acid regulating valve is opened, and quantitative sulfuric acid is added into the shearing dispersion secondary reaction tank 9 to react the sulfuric acid with particulate matters (zinc phosphate and zinc oxide) in the mixed solution to generate soluble zinc sulfate; the secondary reaction solution with more complete reaction and more uniform dispersion is conveyed into a tubular reactor through an emulsifying pump 10 to participate in slurry spraying granulation so as to produce the ammonium phosphate product containing trace elements.
In the method, the process indexes are controlled as follows:
concentration of phosphorus pentoxide in the granulation tail gas washing liquid: 40 to 47 percent
Granulation tail gas wash density: 1.52 g/ml-1.62 g/ml
The content of microelements in the product is 0.5 to 1 percent
Shearing particle size of shearing and dispersing equipment: less than or equal to 0.1mm
The water solubility of microelements is increased: 15%.

Claims (3)

1. A method for improving the water solubility of trace elements in a trace element ammonium phosphate product is characterized in that the used equipment comprises a trace element adding device, a premixing primary reaction device, a shearing dispersion secondary reaction device, and a corresponding conveying pump, a pipeline and a valve;
The microelement adding device comprises a microelement raw material bin, an automatic control metering belt, a conveying belt (5), a conveying lifter (6) and a matched inlet and outlet chute and a matched distribution valve;
The premixing primary reaction device comprises a premixing primary reaction tank (7), a high-strength stirrer (11), a granulating tail gas washing liquid inlet pipe, a microelement raw material inlet pipe, a reaction tail gas exhaust pipe, a primary mixed liquid conveying pump (8), a matched conveying pipeline and a valve, wherein the premixing primary reaction tank is positioned at the lower part of a microelement adding device conveying lifter (6);
The shearing and dispersing two-stage reaction device comprises high-speed shearing and dispersing equipment (12), a two-stage reaction tank (9), a sulfuric acid inlet pipe, a two-stage mixed liquid emulsifying pump (10) and a matched conveying pipeline and a valve;
The method comprises the following steps:
(1) Addition of trace element raw materials
A. checking the integrity of each trace element raw material bin, the premixing primary reaction tank and the shearing dispersion secondary reaction tank, checking the insulation condition of a device motor, checking whether the lubrication of each device is integrity, measuring insulation and powering on;
b. starting a microelement raw material lifting machine, starting a conveying belt, starting a microelement metering belt and turning to a remote control state;
c. Opening a valve of a granulation tail gas washing liquid conveying branch pipe, adding the granulation tail gas washing liquid into the premixing first-stage reaction tank, and starting a high-speed stirrer when the liquid level of the granulation tail gas washing liquid submerges the stirring paddle; opening an air valve of an air pipe at the top of the premixing primary reaction tank to ensure that the premixing primary reaction tank is kept in a micro negative pressure state; setting the addition amount of trace elements, adjusting the frequency of a proper motor, and stably adding trace element raw materials into a premixing primary reaction tank; under the action of a stirrer, the microelement raw material and the phosphoric acid-containing granulation tail gas washing liquid undergo a preliminary reaction, and water vapor generated by the reaction is introduced into a washing system by an air pipe to participate in washing;
d. Continuously adding the granulating tail gas washing liquid and the trace element raw materials into the tank, after the liquid level of the primary premixing reaction tank reaches 80%, starting a primary mixed liquid conveying pump to convey the mixed liquid into a shearing and dispersing secondary reaction tank, and regulating the flow to reach balance;
e. When the premix entering the second-stage shearing and dispersing reaction tank passes through the shearing and dispersing equipment, the shearing and dispersing equipment is started to enable the particles in the premix to be sheared into finer particles and uniformly dispersed in the mixed solution; simultaneously, a sulfuric acid regulating valve is opened, and quantitative sulfuric acid is added into the shearing dispersion secondary reaction tank to react the sulfuric acid with particles in the mixed solution; the secondary reaction solution with more complete reaction and more uniform dispersion is conveyed into an acid preparing tank of a tubular reactor through an emulsifying pump to participate in slurry spraying granulation, and the ammonium phosphate product containing trace elements is produced.
2. The method for improving the water solubility of trace elements in a trace element ammonium phosphate product according to claim 1, wherein in the method, the process index is controlled as follows:
Concentration of phosphorus pentoxide in the granulation tail gas washing liquid: 40% -47%;
Granulation tail gas wash density: 1.52g/ml to 1.62g/ml;
The content of microelements in the product is 0.1 to 4 percent;
Shearing particle size of shearing and dispersing equipment: less than or equal to 0.1mm;
The water solubility of microelements is increased: 10% -25%.
3. The method for improving the water solubility of trace elements in a trace element ammonium phosphate product according to claim 1, which is characterized in that: the high-speed shearing and dispersing equipment is a shearing and dispersing machine, and the rotating speed of a main shaft is 0-2900 r/min.
CN201911137864.7A 2019-11-20 2019-11-20 Equipment and method suitable for improving water solubility of trace elements in trace element ammonium phosphate product Active CN110723999B (en)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB780733A (en) * 1952-09-24 1957-08-07 Hoechst Ag Fertilisers containing trace elements and a process of preparing them
SU1430385A1 (en) * 1986-07-02 1988-10-15 Институт Химии Ан Узсср Method of producing microelement-containing ammophos
CN1644570A (en) * 2004-12-22 2005-07-27 周钢宽 Nutrient liquid of sulfate-phosphate for growth of plant and its production
CN101967070A (en) * 2010-07-23 2011-02-09 中化重庆涪陵化工有限公司 Sulfur, zinc, manganese and boron-containing phosphate ammoniate fertilizer and production method thereof
CN102140582A (en) * 2011-04-29 2011-08-03 金瑞新材料科技股份有限公司 Method for preparing manganese sulfate from leaching slag of electrolytic manganese metal
CN102963873A (en) * 2012-11-24 2013-03-13 宜都兴发化工有限公司 Production method of microelement granule diammonium phosphate
CN102992817A (en) * 2012-11-24 2013-03-27 宜都兴发化工有限公司 Method for producing microelement granular monoammonium phosphate
CN104193453A (en) * 2014-09-01 2014-12-10 瓮福(集团)有限责任公司 Production method of ammonium phosphate containing trace elements
CN104326781A (en) * 2014-10-31 2015-02-04 瓮福(集团)有限责任公司 Adding device and method suitable for producing boron element of boron-containing diammonium phosphate
CN104355734A (en) * 2014-10-24 2015-02-18 瓮福(集团)有限责任公司 Production method of ammonium sulfate-ammonium phosphate composite fertilizer
CN211111778U (en) * 2019-11-20 2020-07-28 瓮福(集团)有限责任公司 Equipment suitable for improving water solubility of trace elements in ammonium phosphate product

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB780733A (en) * 1952-09-24 1957-08-07 Hoechst Ag Fertilisers containing trace elements and a process of preparing them
SU1430385A1 (en) * 1986-07-02 1988-10-15 Институт Химии Ан Узсср Method of producing microelement-containing ammophos
CN1644570A (en) * 2004-12-22 2005-07-27 周钢宽 Nutrient liquid of sulfate-phosphate for growth of plant and its production
CN101967070A (en) * 2010-07-23 2011-02-09 中化重庆涪陵化工有限公司 Sulfur, zinc, manganese and boron-containing phosphate ammoniate fertilizer and production method thereof
CN102140582A (en) * 2011-04-29 2011-08-03 金瑞新材料科技股份有限公司 Method for preparing manganese sulfate from leaching slag of electrolytic manganese metal
CN102963873A (en) * 2012-11-24 2013-03-13 宜都兴发化工有限公司 Production method of microelement granule diammonium phosphate
CN102992817A (en) * 2012-11-24 2013-03-27 宜都兴发化工有限公司 Method for producing microelement granular monoammonium phosphate
CN104193453A (en) * 2014-09-01 2014-12-10 瓮福(集团)有限责任公司 Production method of ammonium phosphate containing trace elements
CN104355734A (en) * 2014-10-24 2015-02-18 瓮福(集团)有限责任公司 Production method of ammonium sulfate-ammonium phosphate composite fertilizer
CN104326781A (en) * 2014-10-31 2015-02-04 瓮福(集团)有限责任公司 Adding device and method suitable for producing boron element of boron-containing diammonium phosphate
CN211111778U (en) * 2019-11-20 2020-07-28 瓮福(集团)有限责任公司 Equipment suitable for improving water solubility of trace elements in ammonium phosphate product

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