Abstract
This paper presents the innovation possibilities of the crushers functional parts and the results of layers’ renovation analyses of the surfaces worn by biomass crusher hammers. The worn functional surfaces of hammers made of Hardox 400 material were renovated by manual arc welding method (welded with a filled wire electrode with its own protection). As an additive material, Lincore 60-O tubular wire from Lincoln Electric was used. The quality of weld layers was assessed on the metallographic sections, where the presence of internal defects was monitored, and the microstructures of welds were identified. In addition to the metallographic analysis, the microhardness in terms of EN ISO 9015-2 was assessed. Based on the performed experiments, it is suitable for the crusher innovation to recommend the chain replacement with a shaped weldment made of Hardox 400 material, the weldability of which is very good, and to make at least one hardfacing layer on its functional surfaces. With this innovation, the service life of the crushing segment could be extended by more than ten-fold.
Highlights
The energy and the electricity generation sector are decarbonizing fast
This paper presents the innovation possibilities of the crushers functional parts and the results of layers’ renovation analyses of the surfaces worn by biomass crusher hammers
Based on the performed experiments, it is suitable for the crusher innovation to recommend the chain replacement with a shaped weldment made of Hardox 400 material, the weldability of which is very good, and to make at least one hardfacing layer on its functional surfaces
Summary
The energy and the electricity generation sector are decarbonizing fast. The European. The processing of biowaste for biogas production is an advantageous solution to minimize the negative impact of existing and constantly emerging waste, which can include sludge and feces produced by a growing population, as well as sludge from animal production [8–14] Another extremely productive source of biogas is waste from agricultural production, for which it is possible to apply the so-called tailor-made organic substances accelerating biomass decomposition processes [15–18]. Due to the small area, there are only limited opportunities for the construction of wind farms, but due to the large agricultural and wood processing production, it is appropriate to focus on the construction of suitably located biogas plants For their operation, they require a constant supply of sludge or biomass from agricultural production waste. From single- and double-shaft shredders, through low speed, pre-shredders, up to high rotation chain or hammer crushers [25,26] Their functional parts have only a limited service-life due to the number of influencing tribodegradation factors. FFiigguurer6e. 6In.nIonvnatoivveadteivsigendoefsthige ncruosfhtehr heecadru, 1s.—hecrruhsheeardh,ea1d.—, 2.—crcurusshheinrghheaamdm,e2r,.—3.—cpruins. hing ham
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