| Today, with the fossil energy increasingly scarce and energy situation is becomingincreasingly tense, There are more and more urgent requirements for searching supplementary andimprove energy utilization efficiency. China is a large agricultural country, which has richagricultural biomass resources, biomass energy is one of the most promising renewable energywith its large number, characteristics, transport renewable conversion and storage. Biomassbriquette fuel uses the agriculture and forestry residues as raw material, a clean, low carbonformed by extrusion molding of biomass renewable energy,which has been widely concerned dueto the high energy density, good combustion characteristic, and has less harmful after burning toenvironment.China imported extrusion type biomass briquetting machine in the late70’s, early technologydevelopment and product research more slowly. To twentieth Century, as rising international oilprices and rising sharply China’s energy needs, the development of biomass energy was rapid. Inrecent years, along with the national continue developing and introducing the biomass formingfuel development policy, biomass briquette industry has continued to develop.But the development process in the biomass briquette also encountered a number ofbottlenecks and obstacles, because the biomass straw contains higher Si, Ca, Cl, K, Mg and othermineral elements, as well as in many sediment (SiO2)into the straw collection process, resulting inthe biomass extrusion molding process of biomass briquetting equipment fast wear, resulting inthe production of molding equipment using the average repair period of not more than300h,individual manufacturers use45steel without any heat treatment, the use of time and not morethan50h. Rapid wear of biomass molding equipment has become a bottleneck restricting thedevelopment.Around the above problems, this paper made the following research:1. Analyzed and studied the wear mechanism of biomass briquetting equipment.2. Simple modular design the impact piston type peace mode biomass briquetting equipment.3. Analyzed and selected the suitable for biomass molding equipment on the wear-resistantmaterials.4. Carried out on modular design with biomass molding equipment, the application of ceramicwear-resistant material in biomass briquetting equipment wear part of experiments.Through the above research, the main achievements as follows:1. Through the analysis of wear and stress on biomass molding equipment, wear biomassmolding equipment is mainly abrasive wear, controlled by micro cutting mechanism. Theequipment operating parameters change, which can effectively reduce the wear. The extrusionmolding equipment screw and rotating speed of screw rod can reduce the wear effectively, thecompression molding equipment also can reduce the abrasion effectively.2. The module of molding equipment design is one of the important method for wear problems.The molding machine into several functional modules, the vulnerable part module accordingto the unified standards, greatly improve the molding equipment maintenance, production andprolong the service life of the whole device.3. Non-Application of metallic materials is very important to choice of wear. Ceramic materialsare bond to the ionic bond, covalent bond, so that it is high melting point, high hardness, lowfriction coefficient and many other helps preventing abrasion performance.4. The wear-resistant ceramic materials in biomass briquetting equipment on the application experiment, that the application of wear-resistant materials alumina ceramics in biomassbriquetting equipment is successful. Although appeared crack and fragmentation the in theprocess, did not damage its own integrity and the molding effect.Alumina ceramic wear partsas main materials of biomass molding equipment can greatly extend the biomass briquettingequipment repair cycle, has a positive economic value. |
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