太陽能矽晶磚切片之切削油廢液膜過濾刮泥裝置探討

Abstract

在太陽能面板之晶磚切片製程中，需要加入切削油與研磨顆粒，當研磨顆粒的銳角無切割能力時，切割能力會逐步下降形成切削油廢液，切削油廢液中包含切削油、晶圓廢屑、研磨顆粒、線鋸，其中SS(懸浮固體物)平均含量為30〜50％(w/w)。 本研究探討以物理性回收機制進行切削油廢液回收時，過濾刮泥裝置對回收效果之影響。本研究使用圓形平板濾膜來實驗，濾膜的孔徑為0.03μm，研究結果顯示過濾膜搭配刮泥棒子的直徑為5厘米時可達最好刮泥效果，當搭配抽液馬達流量為50 GPD時，並利用變頻器去設定旋轉馬達過載安培數為0.73安培可使旋轉馬達順利轉動且預防捲膜現象，最後再搭配破真空間歇操作，即可達成90天長時間的有效運轉。本研究利用物理性的膜過濾回收方法所產出的切削油經由GC-Mass圖譜分析，得知再生油成分與新油的添加劑內容物相似度極高，並且在回收油添加比例範圍為20〜100％，切削油的黏度、pH值、導電度均可符合客戶的要求規格，證明本研究的過濾膜搭配刮泥設備所產出的回收切削油皆符合客戶的需求標準。

Cutting oil with abrasive particles are required in the solar panel crystal brick chips manufacturing processr. When the cutting is in process the cutting ability of the abrasive grains will gradually decrease. When milling particles have no cutting ability, there is a formation of waste cutting oil, which contains waste、wafer crumbs and abrasive particles, wherein the SS (suspended solids) can reach average values of 30-50% (w/w). This study investigated the physical mechanism of waste cutting oil recycling with the use of a scraper device. In this experiment a circular flat membrane was used. The membrane had a pore size of 0.03μm.The results showed that scraper bars with a diameter of 5 cm had the best scraping results to give the membrane prolonged liquidity. With this pumping fluid motor designed flow rate of 50 GPD, the long term operation can be reached up to three months. The chemical properties of the cutting oil after membrane filtration recovery methods was proved by GC-Mass spectrum analysis. And it reavealed that the recycled oil additive composition and the content of the new oil had a high similarity. Thus when added the recycled oil with a proportion ranges from 20 to 100％, the viscosity, pH and conductivity of cutting oil can all meet the customer's requirement. This study proved that cutting oil recovery using a filter membrane with a scraping device can meet the needs of customer requirements for recycled cutting oil without adding other chemical additives.