CN106699280A

CN106699280A - Manufacture method for triammonium phosphate compound fertilizer

Info

Publication number: CN106699280A
Application number: CN201611023298.3A
Authority: CN
Inventors: 李志强
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-21
Filing date: 2016-11-21
Publication date: 2017-05-24

Abstract

The present invention discloses a triammonium phosphate compound fertilizer and a manufacture method thereof. An ammoniation synthetic technology of over-ammoniation of raw materials of monoammonium phosphate and diammonium phosphate and with a degree of neutralization reaching 1.3-1.5 is used to prepare triammonium phosphate mixed material slurry in line with the requirements of the technology, then a triammonium phosphate stabilizer is added, the materials are sent into a roller granulator, the materials are mixed evenly with the raw materials of potassium chloride (potassium sulfate), urea, etc. sent by accessory material processes, the mixture is granulated, then the granulated mixture is subjected to a dryer, a sieving machine, a cooler, etc. and the treated mixture is subjected to a coating treatment to obtain the triammonium phosphate high-efficient compound fertilizer. The triammonium phosphate compound fertilizer consists of the following compositions in weight ratios: 31-45 parts of urea, 25-30 parts of potassium chloride, 28-35 parts of ammonium phosphate and 3-5 parts of ammonium chloride. The advantages are as follows: the urea, potassium chloride, triammonium phosphate, diammonium phosphate, monoammonium phosphate, potassium sulfate, etc. in the microscopic molecular level are used to form the balanced and stable nutrient units. The method can save the former working procedures of phosphoric acid neutralization, ammoniation, etc. and save construction investments.

Description

A kind of manufacture method of triammonium phosphate composite fertilizer

Technical field

The present invention is originally related to a kind of technology of preparing of triammonium phosphate composite fertilizer.

Background technology

All kinds of composite fertilizers (complex fertilizer) of crops are presently used for, its raw materials for production mainly has potassium chloride, potassium sulfate, phosphoric acid One ammonium, Diammonium phosphate (DAP), calcium superphosphate, ammonium chloride, ammonium hydrogen carbonate, urea etc..In order to produce total nutrient content more than 50% Fertilizer, it is necessary to realized using phosphorus ammonium is improved using the method for proportioning.It is simple in order to be adapted to being actually needed for crop growth By the content for improving using urea single nutrients of nitrogen, it is clear that can not meet scientific formula fertilising and required.Simultaneously because Composite fertilizer's (complex fertilizer) of traditional prilling process production, glues with structure is more loose because its granulation process belongs to simple physics Dissipate, fertilizer dissolves release comparatively fast, fertilizer efficiency is decomposed and is lost in soon, and utilization rate of fertilizer is relatively low.

The content of the invention

Present invention aim at the shortcoming of the existing composite heat transfer technology of improvement, and provide a kind of triammonium phosphate composite fertilizer And its manufacture method, to achieve the above object, the present invention takes following design：

Preparation process is used raw material MAP, the excessive ammonification of Diammonium phosphate (DAP), and degree of neutralization reaches the ammonification synthesis of 1.3---1.5 Technique, prepares the triammonium phosphate mixed slurry for meeting technological requirement, triammonium phosphate stabilizer is subsequently adding, to ensure tricresyl phosphate Ammonium is kept relative stability in follow-up composite fertilizer's manufacturing process, and its decomposable process is reduced as far as possible.

Step 1：From phosphoric acid ammonification and after preparing the operation of ammophos (MAP and Diammonium phosphate (DAP) mixture), will Mixed slurry is made a gift to someone the excessive ammonification device of a set of high pressure.Mixed slurry, through tubular reactor, was carried out with raw material gas ammonia (NH3) Degree ammonification.Gas ammonia pressure 0.4---0.7Mpa, 70---85 DEG C of temperature control.Phosphorus ammonium mixed slurry is obtained.

Step 2：Phosphorus ammonium mixed slurry, when reaching gas-liquid solid phase equilibration, ammonia saturation degree (degree of neutralization) reaches technique after testing After 1.2---1.4, automatically in one dashpot of press-in, 5----6 parts of ammonium chloride and 11-20 parts of urea etc. are added as phosphoric acid Three ammonium stabilizers.

Step 3：Then with being pumped into roller pelletizer, then the 25----30 parts of potassium chloride (sulphur sent with burden process Sour potassium), the raw material such as 20----25 parts of urea it is well mixed after granulate, then by dryer, the equipment such as screening machine, cooler, so Triammonium phosphate efficient compound fertilizer is obtained by metering packing again afterwards.

The composition of triammonium phosphate composite fertilizer of the present invention：(weight proportion)

Urea：31~45 parts

Potassium chloride：25~30 parts

Phosphorus ammonium：28~35 parts

Ammonium chloride：3---5 parts

Preparation process ensures that triammonium phosphate is not decomposed, and by the interaction between various nutrients, what formation was stablized in a balanced way supports Subdivision.Such fertilizer monomer, the double salt solid solution for being merged and being constituted by various salt.The present invention prepare compound fertilizer be In micro molecule level, the raw materials such as urea, potassium chloride, triammonium phosphate, Diammonium phosphate (DAP), MAP, potassium sulfate are fused into One organic nutrient entirety, by the interaction between various nutrients, forms nutrient unit stable in a balanced way.Its is main Composition be considered as：Urea, urea ammonium phosphate, ammonium chloride potassium, ammonium-potassium sulfate, ammonium-potassium phosphate, triammonium phosphate, tripotassium phosphate, ammonium The double salt solid solution such as syngenite.

This triammonium phosphate composite fertilizer can according to each growth period of crops to Different Nutrients ground absorbing state, continuously Constantly Releasing nutrient, is made for thing absorption, so as to reduce decomposition loss of the fertilizer in farmland, improves chemical fertilizer utilization ratio.

The present invention prepares triammonium phosphate composite fertilizer, is exactly using high pressure excessive ammonia the characteristics of a maximum in preparation process Change method, by raw material MAP, the excessive ammonification of Diammonium phosphate (DAP), its process is reached after balancing each other, and generates the phosphoric acid of stabilization content Three ammonium components, so as to improve the nitrogen content in system.

The present invention prepares triammonium phosphate, in order to prevent it from decomposing at normal temperatures and pressures, and especially makees in preparation process Specially treated, that is, add appropriate ammonium chloride NH₄Cl and urea CO (NH₂)₂Deng as stabilizer.

The present invention prepares triammonium phosphate, and in order to prevent it from largely being decomposed during separating-purifying, this technique is not changing Using on the premise of proterties, preferential use does not make separating-purifying to product, but is sent directly into next process, carries out mixing and makes Grain, low temperature drying treatment.

Triammonium phosphate composite fertilizer prepared by the present invention, the raw material used in preparation process is MAP, Diammonium phosphate (DAP), Can save in phosphoric acid and the preceding working procedure such as ammonification, such that it is able to save a large amount of repeated construction investments.Can also be in original phosphorus Transformed on sour ammonium process units, produced efficient nitrogen-phosphorus-potassium compound fertilizer.

The present invention is adapted to prepare high nitrogen content, high concentration, high-quality universal composite fertilizer.

Brief description of the drawings：

Fig. 1 is present invention process schematic flow sheet

Specific embodiment：

Embodiment 1：As shown in figure 1,

Step 1：By in MAP and Diammonium phosphate (DAP) mixture and hot water feeding dissolving tank 1, in phosphoric acid ammonification and prepare After ammophos (MAP and Diammonium phosphate (DAP) mixture) operation, by mixed slurry through tubular reactor 2, high pressure of making a gift to someone is excessive Ammonification device, excessive ammonification is carried out with raw material gas ammonia (NH3) again, into high pressure ammoniated device 3, gas ammonia pressure 0.3Mpa, temperature control 60 DEG C of system, is obtained phosphorus ammonium mixed slurry.

Step 2：After ammonia saturation degree reaches technique 1.4 after testing, 35 parts of phosphorus ammonium mixed slurries, in one dashpot 4 of press-in, Add 5 parts ammonium chloride and 12 parts of urea etc. as triammonium phosphate stabilizer.

Step 3：Then with being pumped into roller pelletizer 5, then the potassium chloride (or potassium sulfate) 28 sent with burden process Granulated after the raw materials such as part, 28 parts of urea are well mixed, then by dryer 6, then the equipment such as screening machine 7, cooler 8 pass through again Cross metering packing 9 and triammonium phosphate efficient compound fertilizer is obtained.

Embodiment 2：

Step 1：By in MAP and Diammonium phosphate (DAP) mixture and hot water feeding dissolving tank 1, in phosphoric acid ammonification and prepare After ammophos (MAP and Diammonium phosphate (DAP) mixture) operation, by mixed slurry through tubular reactor 2, high pressure of making a gift to someone is excessive Ammonification device, excessive ammonification is carried out with raw material gas ammonia (NH3) again, into high pressure ammoniated device 3, gas ammonia pressure 0.4Mpa, temperature control 70 DEG C of system.Phosphorus ammonium mixed slurry is obtained.

Step 2：After ammonia saturation degree reaches technique 1.5 after testing, 28 parts of phosphorus ammonium mixed slurries are pressed into a dashpot automatically In 4, add 4 parts ammonium chloride and 15 parts of urea etc. as triammonium phosphate stabilizer.

Step 3：Then with being pumped into roller pelletizer 5, then the potassium chloride (or potassium sulfate) 35 sent with burden process Granulated after the raw materials such as part, 15 parts of urea are well mixed, then by dryer 6, then screening machine 7, the equipment of cooler 8 pass through again Metering packing 9 is obtained triammonium phosphate efficient compound fertilizer.

Embodiment 3：

Step 1：By in MAP and Diammonium phosphate (DAP) mixture and hot water feeding dissolving tank 1, in phosphoric acid ammonification and prepare After ammophos (MAP and Diammonium phosphate (DAP) mixture) operation, by mixed slurry through tubular reactor 2, high pressure of making a gift to someone is excessive Ammonification device, excessive ammonification is carried out with raw material gas ammonia (NH3) again, into high pressure ammoniated device 3, gas ammonia pressure 0.6Mpa, temperature control 80 DEG C of system.Phosphorus ammonium mixed slurry is obtained.

Step 2：After ammonia saturation degree reaches technique 1.3 after testing, 26 parts of phosphorus ammonium mixed slurries are pressed into a dashpot automatically In 4, add 3 parts ammonium chloride and 10 parts of urea etc. as triammonium phosphate stabilizer.

Step 3：Then with being pumped into roller pelletizer 5, then the potassium chloride (or potassium sulfate) 32 sent with burden process Granulated after the raw materials such as part, 29 parts of urea are well mixed, then by dryer 6, screening machine 7, cooler 8, coating machine equipment, then Triammonium phosphate efficient compound fertilizer is obtained by metering packing 9 again.

From above experimental data, with reference to practical condition, according to reaction balance and reaction rate, from optimised process bar Part should be：Ammoniator pressure 0.4--0.5MPA, 70---80 DEG C of reaction temperature.Degree of neutralization is 1.3-----1.5.

Claims

1. a kind of triammonium phosphate composite fertilizer producing process, it is characterized in that：By raw material MAP, the excessive ammonification of Diammonium phosphate (DAP), in 1.3---1.5 is reached with degree, triammonium phosphate is generated, then ammonium chloride NH4CI and urea CO (NH2) 2 is added as stabilizer, tool Body step is as follows：

Step 1：From phosphoric acid ammonification and after preparing ammophos operation, mixed slurry is made a gift to someone the excessive ammonification dress of a set of high pressure Put, mixed slurry, through tubular reactor, excessive ammonification, gas ammonia pressure 0.4---0.7Mpa, temperature are carried out with raw material gas ammonia (NH3) 70---85 DEG C of degree control, is obtained phosphorus ammonium mixed slurry；

Step 2：Phosphorus ammonium mixed slurry, when reaching gas-liquid solid phase equilibration, after ammonia saturation degree reaches technique 1.2---1.4 after testing, Automatically in one dashpot of press-in, 5----6 parts of ammonium chloride and 11---20 parts of urea etc. are added as triammonium phosphate stabilizer；

Step 3：Then with being pumped into roller pelletizer, then the 25----30 parts of potassium chloride or sulfuric acid sent with burden process Granulated after the raw materials such as potassium, 20----25 part urea are well mixed, then by dryer, then screening machine, cooling machine equipment pass through again Cross metering packing and triammonium phosphate efficient compound fertilizer is obtained, and between converter pressure 0.4---0.7MPa, temperature is at 70--85 DEG C Between.

2. a kind of triammonium phosphate composite fertilizer, it is characterised in that：Composition：Weight proportion,

Urea：31~45 parts；

Potassium chloride：25~30 parts；

Phosphorus ammonium：28~35 parts；

Ammonium chloride：3---5 parts.