Refining Principle of Conical Refiner and Double Disc Refiner
From the perspective of refining principle, a conical refiner grind the pulp through a conical refiner disc. Under axial pressure, the slurry is subjected to forces such as shear and friction in the conical space to achieve refining; The double disc refiner relies on two parallel refiner discs that rotate relative to each other, and the pulp is ground and refined in the gap between the two discs.
The taper of the conical grinder refiner plate is generally around 3 ° -10 °, and this taper design can gradually subject the slurry to different degrees of treatment during the grinding process; The clearance between the double disc grinder refiner plate grinder is usually 0.05-0.5mm, which can be precisely adjusted according to the properties of the slurry and the grinding requirements.
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Performance Comparison of Conical Refiner and Double Disc Refiner
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Pulp Consistency of Conical and Double Disc Refiner
The conical mill performs well in processing high concentration slurries, and can adapt to slurry concentrations of 15% -30%; The dual disc grinder is relatively more suitable for medium and low concentration slurries, with a general slurry concentration of 3% -12%.
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Energy Consumption Comparison of Conical and Double Disc Refiners
The energy consumption of a conical slurry mill is related to the pressure and flow rate of the slurry. Typically, the energy consumption per ton of slurry processed is between 30-80 kW · h; The energy consumption of a dual disc slurry mill is related to factors such as disc speed and clearance. The energy consumption for processing 1 ton of slurry is about 50-120 kW · h.
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Fiber Length and Fiber Quality Distribution
In terms of the fiber length distribution after grinding, the fiber length produced by the conical grinder is relatively uniform, and the retention rate of long fibers is higher; The fiber length distribution is wider and the proportion of short fibers is relatively higher after the double disc pulping machine is used for pulping.
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Floor Area
The conical grinder has a compact structure and occupies a relatively small area. Its overall dimensions may be 2-5 meters long, 1-2 meters wide, and 1-3 meters high; The double disc pulping machine has a relatively large volume, generally measuring 3-8 meters in length, 2-4 meters in width, and 1.5-4 meters in height.
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Wear Resistant Position of Conical and Double Disc Refiner
The wear of the conical grinder is mainly concentrated on the surface of the conical grinding disc, which is made of wear-resistant alloys and has a service life of about 5000-8000 hours of continuous operation; The wear of the grinding disc in a dual disc slurry mill is relatively more complex. Due to the relative motion of the two discs, the distribution of wear points is wider, and the service life is approximately 3000-6000 hours.
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Running Noise
The conical pulping machine has relatively low noise during the production process, with a general operating noise of 70-85 decibels; Due to the high-speed rotation of the grinding disc, the operating noise of the double disc pulping machine is relatively high, usually between 85-100 decibels.
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The Difference in Working Efficiency Between Conical and Double Disc Refiner
The production efficiency of a conical grinder is related to the fluidity of the slurry, the speed of the grinding disc, etc. It can process 1-5 cubic meters of slurry per hour; The double disc grinder has a high production efficiency and can process 3-10 cubic meters of slurry per hour.
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Application of Conical Refiner and Double Disc Refiner
In terms of applicability, conical refiner is commonly used for grinding special pulp and high viscosity pulp; The double disc refiner is widely used for pulping various papermaking raw materials, as well as material refinement processing in some food and chemical industries.
