CN216513599U - Nitro-compound fertilizer anti-caking treatment system - Google Patents
Nitro-compound fertilizer anti-caking treatment system Download PDFInfo
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- CN216513599U CN216513599U CN202122735520.5U CN202122735520U CN216513599U CN 216513599 U CN216513599 U CN 216513599U CN 202122735520 U CN202122735520 U CN 202122735520U CN 216513599 U CN216513599 U CN 216513599U
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Abstract
The utility model relates to a nitro compound fertilizer anti-caking processing system, comprising: the vibrating screen is used for screening the nitro compound fertilizer particles; a melter for melting crystals of the anti-caking agent; a film coating machine for coating the surfaces of the particles by spraying the anti-caking agent on the surfaces of the particles; a vibrated fluidized bed for dehumidifying the particles and solidifying the anti-caking agent to form a crystalline layer; a powder water cooler for cooling the particles by water; a cooling bin for storing and further cooling the pellets; and the refrigerating system is used for providing dry cold air for the vibrated fluidized bed and the cooling bin. The utility model can melt the crystals of the anti-caking agent through the melter and spray the crystals into the film coating machine for coating, dehumidify and crystallize the particles through the vibrated fluidized bed, and store and cool the particles through the cooling bin to prevent the particles from cooling and crystallizing to form blocks due to the heat release of the secondary reaction, and the nitro-compound fertilizer treated by the system can realize the purposes of full water solubility, no pollution and anti-blocking.
Description
Technical Field
The utility model relates to the technical field of chemical fertilizer processing, in particular to a nitro compound fertilizer anti-caking treatment system.
Background
The nitro compound fertilizer is prepared by using ammonium nitrate as nitrogen source and adding compound fertilizer raw materials of phosphorus, potassium and the like, and the produced N, P, K high-concentration compound fertilizer contains nitrate nitrogen and ammonium nitrogen, and the main products comprise ammonium nitrate phosphorus and ammonium nitrate phosphorus potassium.
At present, most of nitro-compound fertilizer finished product production lines are produced by sieving products granulated by a high tower, cooling the products by a powder running water cooler, spraying an anti-caking agent on coating equipment, and then packaging the products in a packaging system. The anti-caking agent mostly adopts an inert pasty or powdery anti-caking agent with stronger hydrophobicity, the basic components of the inert pasty anti-caking agent are mineral oil and paraffin, the basic components of the powdery anti-caking agent are talcum powder and a hydrophobic surfactant, and the anti-caking agent is difficult to degrade in soil in the actual use process, has a certain toxic effect on plants, pollutes the soil and does not accord with the national agricultural development strategy. And at present, the water and fertilizer integration is widely popularized in China, and has the advantages of saving fertilizer and water, saving labor force, uniform drip irrigation, improving the crop yield and the like. However, the anti-caking agent with poor water solubility sprayed on the surface of the nitro-compound fertilizer can greatly influence the full water solubility of the nitro-compound fertilizer and the use of drip irrigation, and the commonly used anti-caking agent with better water solubility not only needs larger spraying amount but also easily causes the hardening of the nitro-compound fertilizer, thereby influencing the use of farmers and limiting the popularization.
SUMMERY OF THE UTILITY MODEL
The utility model provides a treatment system for a nitro compound fertilizer anti-caking process, which aims to achieve the purpose of full water-soluble pollution-free anti-caking of a nitro compound fertilizer spraying anti-caking agent.
This nitro compound fertilizer prevents caking processing system includes:
the vibrating screen is used for screening the nitro compound fertilizer particles produced by the granulation process to remove the particles with the particle size below a set particle size;
a melter for melting crystals of calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate;
a coating machine, which is used for coating the surface of the screened nitro compound fertilizer particles by spraying the dissolved calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals as an anti-caking agent;
the vibrated fluidized bed is used for dehumidifying the coated nitro compound fertilizer particles and solidifying the anti-caking agent sprayed on the surfaces of the nitro compound fertilizer particles to form a crystal layer;
the powder flowing water cooler is used for carrying out water cooling on the nitro compound fertilizer particles forming the crystallization layer;
the cooling bin is used for storing the nitro-compound fertilizer particles cooled by water cooling and further cooling the nitro-compound fertilizer particles;
and the refrigerating system is used for respectively providing dry cold air for the vibrated fluidized bed and the cooling bin.
Optionally, the system further comprises an air heater for providing hot air to the film wrapper.
Optionally, an air distributor is disposed within the cooling bin.
The system provided by the utility model can be used for spraying water-soluble calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals serving as an anti-caking agent into a coating machine to spray and coat nitro compound fertilizer particles through a melter, dehumidifying and cooling the nitro compound fertilizer particles through a vibrated fluidized bed to solidify the anti-caking agent on the surfaces of the nitro compound fertilizer particles into a crystal layer, and storing and cooling the nitro compound fertilizer particles through a cooling bin to prevent the nitro compound fertilizer particles from cooling and crystallizing to form blocks due to heat release of secondary reaction.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the utility model will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic configuration diagram of an anti-caking treatment system for nitro compound fertilizer in the embodiment of the utility model.
Reference numerals:
1-vibrating screen; 2-a film coating machine; 3-a melter; 4-vibrating the fluidized bed; 41-a fluidized bed blower; 5-an ammonia refrigeration system; 6-powder running water cooler; 7-a cooling bin; 71-an air distributor; 8-bucket elevator; 9-belt conveyor.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, the nitro compound fertilizer anti-caking treatment system used in one embodiment of the nitro compound fertilizer anti-caking process of the present invention comprises the following components:
a film coating machine 2; a vibrating screen 1 for conveying nitro compound fertilizer particles to a film coating machine 2; a melting device 3 for melting crystals of calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate and conveying the crystals to the film coating machine 2; a vibrated fluidized bed 4 for receiving the coated nitro compound fertilizer particles from the coating machine 2; a powder water cooler 6 for receiving and water-cooling the nitro-compound fertilizer particles from the vibrated fluidized bed 4; a cooling bin 7 for receiving and cooling the nitro-compound fertilizer particles from the powder flowing water cooler 6; an ammonia refrigeration system for providing dry cold air to the vibrated fluidized bed 4 and the cooling bin 7 respectively. A plurality of bucket elevators 8 and a plurality of belt conveyors 9 are also provided in the system and are used for conveying the nitro compound fertilizer particles. The ammonia refrigeration system adopted in the embodiment comprises a liquid ammonia storage tank and an ammonia evaporator, natural air passes through the ammonia evaporator, water in air is removed under the refrigeration of the liquid ammonia to be changed into dry cold air, the liquid ammonia is changed into gaseous ammonia after being evaporated, the gaseous ammonia can enter a tubular reactor of the ammonium nitrate production system to react with nitric acid to be changed into ammonium nitrate, and the process has no power consumption, and has obvious power-saving and energy-saving advantages compared with a screw water chilling unit generally adopted in the industry at present. It will be appreciated by those skilled in the art that the present invention may be used in other embodiments in conjunction with other types of refrigeration systems known in the art, such as absorption refrigeration systems. The above components are all existing devices, and the specific structure and working principle thereof are not described herein.
The working principle of the anti-caking treatment system for the nitro compound fertilizer provided by the embodiment is further described by combining the process:
the vibrating screen 1 is used for screening the nitro-compound fertilizer particles produced by the granulation process to remove particles with a set particle size below, such as particles with a set size below 2mm, below 3mm or below 4mm, so as to prevent the small particles from forming a wall sticking effect after entering the coating machine 2;
the melter 3 melts calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals.
And the coating machine 2 sprays the dissolved calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals on the surfaces of the screened nitro compound fertilizer particles for coating. The spraying amount of the anti-caking agent can be controlled between 5 and 10kg/t, wherein kg/t represents the dosage of the anti-caking agent per ton of nitro compound fertilizer particles. In order to improve the coating effect, an air heater (not shown in the figure) can be further arranged, and hot air generated by the air heater is introduced into the coating machine 2 for auxiliary coating. The hot air has the specific function of preventing or reducing the influence of local solidification of the crystallized molten liquid on the uniformity of the coating, and further ensuring the fluidity of the crystallized molten liquid so that the crystallized molten liquid can be better coated on the nitro-compound fertilizer particles, and the temperature of the hot air is preferably higher than the melting point of crystals.
The vibrated fluidized bed 4 dehumidifies the coated nitro-compound fertilizer particles, and the anti-caking agent sprayed on the surfaces of the nitro-compound fertilizer particles is solidified to form a crystal layer.
And the powder water cooler 6 is used for cooling the crystallized nitro-compound fertilizer particles by water cooling.
The cooling bin 7 stores the nitro-compound fertilizer particles cooled by water and further cools the nitro-compound fertilizer particles. Because the nitro-compound fertilizer has a secondary temperature return phenomenon in the storage process and because ammonium nitrate has four crystal systems, the nitro-compound fertilizer can carry out secondary reaction heat release in the storage process to cause product caking, the nitro-compound fertilizer can continuously carry out cooling in the cooling bin 7 to take away secondary reaction heat in time and thoroughly complete and thoroughly cool the reaction in the finished product under the protection of the coating crystal layer. For example, in a specific example, the temperature of the nitro-compound fertilizer particles is reduced to 40 ℃ by the powder flowing water cooler 6, and then the nitro-compound fertilizer particles stored in the cooling bin 7 are further cooled to ensure that the temperature of the nitro-compound fertilizer particles is lower than 1 ℃ after the nitro-compound fertilizer particles are stored for two days. In order to realize the uniform cooling of the nitro-compound fertilizer, an air distributor 71 can be arranged in the cooling bin 7 to uniformly convey cold air.
The ammonia refrigeration system 5 is used for providing dry cold air to the vibrated fluidized bed 4 and the cooling bin 7 respectively. In other embodiments, different refrigeration systems may be used to independently generate the cool dry air to be supplied to the vibrated fluidized bed 4 and the cooling chamber 7.
The nitro-compound fertilizer particles after the treatment can flow out of the cooling bin 7 and are conveyed to a packaging and stacking system.
The system provided by the utility model can be used for spraying water-soluble calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals serving as an anti-caking agent into a coating machine to spray and coat nitro compound fertilizer particles through a melter, dehumidifying and cooling the nitro compound fertilizer particles through a vibrated fluidized bed to solidify the anti-caking agent on the surfaces of the nitro compound fertilizer particles into a crystal layer, and storing and cooling the nitro compound fertilizer particles through a cooling bin to prevent the nitro compound fertilizer particles from cooling and crystallizing to form blocks due to heat release of secondary reaction.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. An anti-caking treatment system for a nitro compound fertilizer is characterized by comprising a vibrating screen, a melter, a film coating machine, a vibrating fluidized bed, a powder running water cooler, a cooling bin and a refrigerating system;
the vibrating screen is used for screening the nitro-compound fertilizer particles produced by the granulation process to remove the particles below a set particle size;
the melting device is used for melting calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals;
the coating machine is used for receiving the screened nitro-compound fertilizer particles from the vibrating screen and receiving the dissolved calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals from the melting device, and the dissolved calcium nitrate dihydrate, calcium ammonium nitrate or magnesium chloride hexahydrate crystals are sprayed on the surfaces of the screened nitro-compound fertilizer particles as an anti-caking agent to coat;
the vibrated fluidized bed is used for receiving the coated nitro compound fertilizer particles from the coating machine, dehumidifying the coated nitro compound fertilizer particles and solidifying the anti-caking agent sprayed on the surfaces of the nitro compound fertilizer particles to form a crystal layer;
the powder flowing water cooler is used for receiving the nitro compound fertilizer particles forming the crystallization layer from the vibrated fluidized bed and cooling the nitro compound fertilizer particles forming the crystallization layer by water cooling;
the cooling bin is used for receiving and storing the nitro-compound fertilizer particles cooled by water from the powder running water cooler and further cooling the nitro-compound fertilizer particles;
the refrigerating system is used for respectively providing dry cold air for the vibrated fluidized bed and the cooling bin.
2. The anti-caking nitro compound fertilizer treatment system according to claim 1, wherein:
the device comprises an air heater for providing hot air for the film coating machine.
3. The anti-caking nitro compound fertilizer treatment system according to claim 1, wherein:
and an air distributor is arranged in the cooling bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122735520.5U CN216513599U (en) | 2021-11-08 | 2021-11-08 | Nitro-compound fertilizer anti-caking treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122735520.5U CN216513599U (en) | 2021-11-08 | 2021-11-08 | Nitro-compound fertilizer anti-caking treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN216513599U true CN216513599U (en) | 2022-05-13 |
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| CN202122735520.5U Active CN216513599U (en) | 2021-11-08 | 2021-11-08 | Nitro-compound fertilizer anti-caking treatment system |
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| CN (1) | CN216513599U (en) |
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2021
- 2021-11-08 CN CN202122735520.5U patent/CN216513599U/en active Active
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