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Efficient granulation mechanism and performance analysis of the ring die pellet mill

Author: ChenBingWei
Tutor: WuKai
School: Nanjing University of Technology and Engineering
Course: Mechanical Manufacturing and Automation
Keywords: Ring mold Pressure roller Pellet mill Granulation mechanism Optimization
CLC: S817.12
Type: Master's thesis
Year: 2009
Downloads: 223
Quote: 12
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Abstract


Ring die pellet mill is one of the four hosts of feed machinery , occupies a very important position largely determines the production of feed processing , feed processing . At present , the domestic ring die pellet mechanisms tablets mechanism is almost empty, and pellet mill with the same type of equipment abroad compared persists structure is irrational , low production efficiency , high energy consumption and other defects , which greatly restricts the product's international competitiveness . Study ring die pellet mechanism and structure optimization techniques to enhance the feed machinery overall design , the manufacturing level , and promote the development of feed industry has important theoretical significance and practical value . The main work is as follows : 1. Analysis of the distribution of the granulation process the material layer in the granulation chamber , noted that the linkages between the distribution of the three regions of the material layer , the material between the ring mold and the pressure roller force the analysis of the state , derivation of theoretical formulas of the optimum thickness of the layer of material of the feed zone . 2. Analysis of the forces of the ring mold hole in the material during the extrusion process , the mathematical model of a ring mold hole extrusion force and the material properties of the granulation process based on this model , reveal the material Poisson squeeze the relationship between the pressure ratio, the friction coefficient , and the aspect ratio of the ring mold with the pelleting process . Study ring mold hole by the force of the simplified model , based on a simplified model of the ring die orifice finite element stress analysis , results show that the greater the feed inlet ring mold hole chamfering , the smaller the stress , the material is more easily be extruded, the longer the life of the ring mold . Studied the relationship between the ring mold and the pressure roller of the structural parameters and the material pressed into the height and the ring die pellet mill production efficiency . The advantage of the size of the roller ring die pellet mill and three roller ring die pellet mill to improve production efficiency , and optimized . Derived ring die pellet mill energy consumption theoretical model , analysis of the impact ring mold factors of the energy consumption of the granulator , to reveal the relationship between the ring mold line speed and the granulation power consumption , and verified by experiments . The topic for the ring die pellet mechanisms Reap principles and performance to do a more comprehensive study , the research results to improve the ring die pellet mill pellet quality , production efficiency , the granulation energy consumption and service life has a certain reference value and application value.

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CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > General Animal Science > Animal husbandry machinery and equipment > Feed harvest processing machinery > Feed processing machinery
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