Through the characteristics of low energy consumption, high energy saving, low investment, simple operation, and no pollution from equipment discharge, the installation of the double roll extruding granulator needs to be debugged. During the debugging, the correct method should be adopted. First, the distance between the pressure rolls should not be too small or too large, and should be adjusted within the specified range. Second, the pressure cap on the side of the bearing pedestal should not be too loose or too tight, which will lead to the deviation of the shaft roll, You are described in detail below.
1、 Advantages of twin roll extruding granulator
1. Low energy consumption and energy-saving roller extrusion granulation is a kind of material granulation at room temperature. Compared with other methods, it does not require drying measures such as fuel and gas.
2. Steam granulation is a common production method of compound fertilizer without binder in China. After intermolecular condensation and crystallization, steam plays the role of binder in the production process. However, during the drying process, the moisture inside and on the surface of the particles must be discharged, otherwise the fertilizer is easy to bond and caking during storage. Drying granulation does not need another additive, but only uses the intermolecular force of the material itself, thus simplifying the process and reducing energy consumption.
3. The low investment is due to the saving of drying process, low rate of return (about 15% of the total feed of the extruder), simple process flow and low investment.
4. More than 20 kinds of materials have been successfully used in extrusion granulation, including ammonium nitrate, urea, ammonium chloride, calcium nitrate, potassium chloride, potassium sulfate, etc. Moreover, the extrusion granulation process can flexibly replace the product formula in a very short time. A set of devices can produce more than 30 kinds of formula products.
5. The consumption capacity of extrusion granulation is only electricity, and there is no discharge of three wastes in environmental protection, which is in line with the basic national environmental protection policy and the enterprise's environmental protection development strategy.
2、 Debugging Method of Double roll Extrusion Granulator
1. Press roll clearance adjustment: in production, sometimes it is necessary to increase the output or bite angle, at this time, the distance between the two compression shafts can be increased, and the distance between the driving shaft and the passive shaft can be increased. The steps are as follows: stop the machine, remove the upper gear bars of the two bearing pedestals, adjust the adjustment plate between the two bearing pedestals to the required thickness, and do not collide the rollers between the two rollers, which should be kept at least 0.3-1mm.
2. Ball and socket alignment adjustment. The ball socket is formed by the concavity on the main and driven roller surfaces, so there are problems of axial alignment and circumferential alignment:
1) The axial alignment has been adjusted during installation. Generally speaking, it is unlikely to be adjusted. When it is necessary to adjust, tighten or loosen the gland on both sides of the passive bearing seat, so as to drive the eccentric sleeve displacement to correspond to the driving shaft roll.
2) Circumferential alignment: The procedure of circumferential alignment is to loosen the six connecting bolts between the driven gear and the adjusting sleeve, so that the adjusting device and the driven gear are slightly separated. Since the adjustment amount of the ball seat is considered in the design and two adjusting bolts are installed, the dislocation can be adjusted no matter how many dislocations are.
