50,000 Tons/year Ammonium Sulfate Fertilizer Pellet Production Line Project

Date: 12/03/2020 08:56:53 From: wood-pellet-plant.com Clicks:

The chemical fertilizer plant builds a production line for processing ammonium sulfate granular fertilizer, with an output of 50,000 tons/year. The equipment required in the production line includes crushers, organic fertilizer pellet machine, dryers, hot blast stoves, silos and other equipment

1. Construction content

Build a production line for processing ammonium sulfate granular fertilizer. The production scale is shown in Table 1-1.

Table 1-1 List of production scale

National standards for ammonium sulfate are shown in Table 1-2.

Table 1-2 National Standard for Ammonium Sulfate (GB/T535 1995)

The project covers an area of ​​13,320m2, production workshop building area of ​​1500m2, raw material warehouse building area of ​​1000m2, finished product warehouse building area of ​​2000m2, office and living room building area of ​​200m2, maintenance building building area of ​​200m2, power distribution room building area of ​​20m2. The hardened area of ​​the road site is 2000m2, and the green area is 1000m2. The specific construction content is shown in Table 1-3.

Table 1-3 List of main construction contents

2. Project Equipment

The list of equipment used in this project is shown in Table 1-4.

Table 1-4 List of main equipment

3. Raw and Auxiliary Materials

See Table 1-5 for the list of raw and auxiliary materials used in this project.

Table 1-5 List of main raw materials

Ammonium sulfate: molecular formula is (NH4)2SO4, molecular weight is 132.13; colorless crystals or white particles, odorless. Decomposes above 280℃. Solubility in water: 70.6g at 0℃, 103.8g at 100℃. Insoluble in ethanol and propanol. The pH of the 0.1 mol/L aqueous solution is 5.5. The relative density is 1.77. The refractive index is 1.521. Ammonium sulfate is mainly used as fertilizer and is suitable for various soils and crops.

The main technical and economic indicators

The main economic and technical indicators of this project are shown in Table 1-6.

Table 1-6 The main economic and technical indicators of the project

4. Process Flow of Fertilizer Granule Production Line:

The specific processing process of this project is the process of mixing, crushing, granulating, sieving, drying, sieving and packaging. The specific process flow is as follows:

1. Feeding and mixing

The raw material is ammonium sulfate, which is shipped from bags to the raw material warehouse in the factory for storage. The raw materials are transported by the conveyor belt to the mixer for mixing (depending on the dryness and wetness of the raw materials, a small amount of water is added during the mixing process).

2. Smash

The agitated raw materials are sent to the pulverizer through a conveyor belt and crushed by mechanical extrusion. The pulverizer is closed-type pulverization. The feeding port is set in a bucket structure, and the discharge port is connected with a plastic pipe in the rear bin. It can realize fully enclosed conveying, effectively avoiding the escape of particles in the crushing process. An air-collecting hood is set at the feeding port for centralized air induction, which is merged into the bag filter for purification treatment.

3. Extrusion granulation

The project materials directly enter the granulator through the conveyor belt, and the ammonium sulfate particles are formed by mechanical beating in the granulator. Finally, the conveyor belt on the discharge port enters the screening device behind, and an air collecting hood is set at the feeding port for centralized guidance. The wind flows into the bag filter for purification.

4. Screening

The screening of the project adopts a secondary mechanical rolling screen. The materials are separated by rolling in the rolling screen. The qualified particles enter the drying process, and the unqualified materials are returned to the mixing process with a conveyor belt to be stirred and crushed again. The project adopts a closed type screening machine, and the generated dust is discharged after being purified by setting up an air collecting hood and cooperating with a centralized induced air collection device, using a bag filter.

Fertilizer Pellet Production Line Project

5. Drying

Rotary dryer is adopted, and the principle of drying: the belt and pulley are driven by the main motor, the drive shaft is driven by the reducer, and the split gear installed on the drive shaft and the large ring gear on the fixed body work in opposite directions. The material is added from the feeding end through the inside of the cylinder. The lifting plate installed on the inside of the cylinder continuously turns the material up, so as to achieve the purpose of uniform drying, and the dried material flows out from the discharge port. With the continuous rotation of the motor, the continuous entry of materials can achieve mass production. A dryer is used to dry the materials. The combustion temperature of the hot air stove is 180~230℃, the drying temperature of the dryer is 80~100℃, and the drying time is 10min.

The combustion chamber of the natural gas hot blast stove is integrated with the heat exchanger. It adopts an all-steel multi-layer sleeve structure. The lower part of the furnace core is the combustion chamber, and the upper part and the surroundings are circular heat exchangers. Both air and flue gas are double-pass, each row Its way to exchange heat. In order to improve thermal efficiency, multi-head spiral groove heat transfer technology and turbulent flow principle are used to reduce the thickness of laminar flow, so that air and flue gas can continuously exchange rotation directions during travel, which greatly enhances the heat exchange effect. The main working process: natural gas produces high-temperature flue gas in the furnace, which enters the smoke ring under the action of a fan, exchanges heat with the outside air, and is discharged from the exhaust pipe through the flue. The cold air is blown into the hot stove shell by the blower. The furnace top flows into the air ring outside the furnace, and the material is supplied by the hot air outlet pipe.

Control measures: According to the combustion characteristics of the hot blast stove, the combustion process of the hot blast stove can be divided into two stages: the rapid heating period and the temperature management period. The switching between the two is judged by the change of the vault temperature and the flue temperature. When the vault temperature reaches the set value, the management period begins, and the combustion end point is determined by the exhaust gas temperature. When the exhaust gas temperature reaches the requirement, the ratio of air and natural gas is adjusted to reduce the combustion operation to save natural gas consumption.

The combustion exhaust gas of the natural gas hot blast stove is discharged through an 8m high exhaust cylinder.

6. Screening

The screening of the project adopts a secondary mechanical rolling screen. The materials are separated by rolling in the rolling screen. The qualified particles enter the packaging process, and the unqualified materials are returned to the mixing process by a conveyor belt and re-mixed and crushed. The project adopts a closed type screening machine, and the dust generated at the inlet and outlet of the project is discharged after being purified by setting up an air collecting hood and cooperating with a centralized induced air collection device, using a bag filter.

7. Packaging

The products of this project are delivered to the packaging machine through a conveyor belt, bagged and sealed mechanically, and stored for sale. The product is granular, so there is almost no dust during the packaging process.

Richi Machinery mainly produces organic fertilizer pellet production line, chicken manure pellet production line, cattle manure pellet production line and horse manure pellet production line. If you are interested in our production line equipment, please contact us!

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