Many obstacles hamper the full exploitation of pruning residues for energy. Among these, harvesting is a crucial point in the development of a sustainable supply, because it greatly affects the quality of the fuel and profitability of production. In normal forestry operations, drum or disk chippers are the tools most frequently used for comminution. A new chipper has been designed which can collect different pruning residues produced under different field conditions and reduce them to a standard chip size (P45) suitable for boilers. Comminution is carried out by a double-auger on which different types of blades can be mounted. This paper compares outcomes in terms of machine performance and particle size distribution as a consequence of the use of a helical (HELK) or hoe-shaped (HSK) blade. The study was conducted on a peach plantation in Spain grown with the “open centre” or "vase" training method. Analysis of the main elements illustrated the difference between the types of blades. The HELK blade performed better in terms of coverage of area (0.52 ha h⁻¹) and material processed (1.06 t h⁻¹). Moreover the main fraction of the particle size (60% of the fraction 3.15 ≤ P ≤ 45 mm) reached 79.2% with the HELK compared with the 67.9% with the HSK. However, from a mechanical standpoint, the HSK blade was found to perform better in terms of ease of maintenance, though the helical blade gave better results for the collection of peach pruning residues.

许多障碍阻碍了修剪残渣的充分利用。其中，收获是可持续供应发展的关键点，因为它极大地影响了燃料的质量和生产的获利能力。在正常的林业作业中，鼓式或圆盘削片机是最常用于粉碎的工具。设计了一种新的削片机，可以收集在不同田间条件下产生的不同修剪残留物，并将其减少到适合锅炉的标准切屑尺寸（P45）。粉碎是通过双钻进行的，可以在其上安装不同类型的刀片。本文根据使用螺旋（HELK）或形（HSK）刀片的结果，比较了机器性能和粒度分布方面的结果。该研究是在西班牙采用“开放式中心”或“花瓶”培训方法种植的桃子种植园上进行的。对主要元素的分析说明了叶片类型之间的差异。HELK刀片的覆盖面积（0.52公顷/小时）表现更好^-1）和已处理的材料（1.06 t h ^-1）。此外，使用HELK时，粒度的主要部分（占3.15≤P≤45 mm的部分的60％）达到了79.2％，而使用HSK达到了67.9％。但是，从机械的角度来看，虽然螺旋形刀片在收集桃子修剪残留物方面提供了更好的结果，但从维护方便性方面考虑，它的性能更好。