Roller extrusion granulator

Roller extrusion granulator

In the system of the opposite roller extrusion granulator, the transmission plan of single motor driving single roller through gear box is adopted, so as to avoid assembly drive when the power is in power, the trouble of starting, maintenance and installation caused by the selection of power motor. The counter-roll extrusion granulator is a kind of material control molding instrument, and its characteristic is destined to be in the low position of compound fertilizer production. The advantage of roller extrusion granulator in compound fertilizer production is energy conservation and consumption reduction. Extrusion granulating is material granulating under normal temperature. Compared with other methods, monotonous methods such as fuel oil and gas are not needed.

1. Introduction of counter roll extrusion granulator

1.1. Energy conservation and consumption reduction. Extrusion granulating means that materials are granulated at room temperature. Compared with other methods, drying measures such as fuel oil and gas are not needed.

1.2. No need to add additional adhesive the production method of compound fertilizer commonly used in china is steam granulating. After condensation and crystallization among the molecules of materials, water vapor acts as an adhesive in the process of fabrication. But during the drying process, the water inside and on the surface of the particles must be driven out, otherwise the fertilizer is easy to bond and clot during the storage process. However, dry pelletizing does not need other additives, but only needs to utilize the molecular force of the material itself, which simplifies the process and reduces the energy consumption.

1.3. Low investment because the drying process is not included, and the return ratio is low (accounting for about 15% of the total feeding volume of the extruder), the technological process is simple and the investment is low.

1.4. Flexible composition of raw materials the production route of the raw materials for extrusion granulating is relatively wide. Currently, there are more than 20 kinds of materials successfully used for extrusion granulating: ammonium nitrate, urea, ammonium chloride, calcium nitrate, potassium chloride, potassium sulfate, etc. In addition, the extrusion granulating process can flexibly change the product formula in a very short time, and a set of device can produce more than 30 kinds of formula products.

1.5. The opposite roller extrusion granulator is environmentally friendly and has no discharge of three wastes. The consumption capacity of extrusion granulating is only electric power, and environmental protection has no discharge of three wastes.

2. Applicable environment of opposite roller extrusion granulator

Applicable industries: nitrogen fertilizer, phosphate fertilizer, potash fertilizer, compound fertilizer, etc;

Production process: no drying process, granulating at normal temperature, one-time molding, less investment and quick effect;

Production Capacity: 1-5 t/h;

Applicable raw materials: urea, ammonium chloride, ammonium sulfate, calcium phosphate, calcium superphosphate, potassium chloride, potassium sulfate, etc;

3. Mechanical principle of roller extrusion granulator

3.1. In the system of the double-roll extrusion granulator, the transmission plan of single motor driven by gear box and single roller is selected, so that the assembly drive can be avoided at power, the trouble of starting, maintaining and installing caused by the selection of power motor.

3.2. The gear box in the roller extrusion granulator adopts planetary transmission, or the combination mode of cylindrical gear and planetary transmission, which can make the gear box under the same bearing capacity, compared with the cylindrical gear reducer, the volume and component are reduced by 1/3-1/2, because it can reduce the load exerted on the roller end due to the suspension device, and improve the stress situation of the roller and the supporting bearing.

3.3. The motor output end of this equipment adopts the connection type of steel ball coupling and cross universal coupling, which can not only get used to the connection demand of floating roller system, and it can make the steel ball coupling in the roller extrusion granulator slip quickly when the equipment is overloaded or the foreign matter gets stuck, and then maintain the gear box, motor and main engine system from damage.

3.4. Each driving roller in the roller extruding granulator is driven by its own gear box, and its exit shaft is driven by hollow shaft, which is directly fixed at the end of the roller shaft by locking plate without anchor device bolts, this saves the trouble of some devices.

3.5. Because the planetary gear box of the transmission system has a series of advantages such as power density, small volume and compact layout, it is a more suitable transmission device in the roller extrusion granulator.

4. Granulating advantages of roller extrusion granulator

4.1. Counter-roll extrusion granulator is a kind of material treatment molding instrument, and its characteristics are destined to be at an important low level in the production of compound fertilizer. The advantage of roller extrusion granulator in the production of compound fertilizer is energy saving and consumption reduction. Extrusion granulation is the granulation of materials at normal temperature. Compared with other methods, monotonous methods such as fuel oil and gas are not needed.

4.2. The roller extrusion granulator does not need other added adhesives, and the commonly used production method of compound fertilizer in China is steam granulation. After condensation and crystallization among material molecules, water vapor plays a role of adhesive in the process of fabrication. But in the monotonous process, the water inside and outside the particles must be driven out, otherwise the chemical fertilizer is easy to bond and agglomerate during the storage process.

4.3. While dry granulation does not need other additives, it only needs to use the intermolecular force of the material itself, which simplifies the process and reduces the energy consumption. The investment of the roller extrusion granulator is relatively low because the monotonous process is omitted, and the return ratio is low (accounting for about 15% of the total feeding amount of the kneading machine). The process is simple and the investment is relatively low.

4.4. The materials of the roller extrusion granulator are composed of active collaterals. Extrusion granulation produces a wide range of materials. At that time, there were more than 20 kinds of materials successfully used for extrusion granulation: ammonium nitrate, urea, ammonium chloride, calcium nitrate, potassium chloride, potassium sulfate, etc. In addition, the selection of extrusion granulator can activate and complete the conversion of product formula in a very short time, and a set of equipment can produce more than 30 kinds of products with formula.