抗腐蝕沼氣發電機組件調整之研製與成本分析

The Development of Adjusting and Cost Analysis of Biogas Generator of Corrosion-Resistant

高敏恆(Min-Heng Kao) ； 雷鵬魁(Perng-Kwei Lei)

《農林學報》 62卷3期 (2013/09) Pp. 213-225

https://doi.org/10.30089/JAF.201309_62(3).0003

摘要

沼氣為多用途的再生能源之一，用來做發電的效益高，但由於沼氣中含有0.2~0.5%的硫化氫，會造成引擎內部零件腐蝕導致設備損壞，且現今無沼氣專用引擎，目前國內使用之沼氣發電機的沼氣都必需經過脫硫之後才可以使用，但國內的脫硫技術無法完全百分之百去除沼氣中的硫化氫，所以導致引擎腐蝕問題，造成使用者對於沼氣利用意願不高的主因。為了解決硫化氫腐蝕引擎的問題，本研究以柴油引擎改裝為沼氣驅動引擎，將會受到硫化氫腐蝕之內部零件更換為耐腐蝕之材質並記錄其修改過程，修改零件有：易受硫化氫腐蝕之零件包含曲軸軸承與連桿軸承，因軸承成分含有銅金屬，容易受到硫化氫腐蝕，所以將含銅之材料更換為巴氏合金材質；曲軸的油封材質為一般橡膠，橡膠若遇硫化物會變硬且無彈性，進而造成油封容易產生裂痕失去原本的功能，所以將矽氧樹脂材質之油封來替換成橡膠；將噴油嘴替換火星塞點火。修改後之沼氣發電機雖然成本比原來之發電機高約20萬元，但減少了裝設脫硫設備之費用，每年可節省51,000元的維護成本。

關鍵字

沼氣發電機 ； 抗腐蝕 ； 硫化氫

並列摘要

One of a multipurpose renewable energy for biogas, biogas for generation had high efficiency. However, biogas contains hydrogen sulfide, that hydrogen sulfide, result from parts of copper constituent corrosion, so that damage to the equipment. Now, it not's biogas special engine, so biogas must desulfurization, but now desulfurization technically can't be completely 100% remove hydrogen sulfide from biogas. Therefore, the problem of corrosion is still existence, it cause biogas use wish not high principal factor by breeders. In the cause of solve the problem of the hydrogen sulfide corrosion engine. This study converted diesel engine into biogas driven engine, engine converted Corrosion parts into corrosion-resistant materials and record process. We selected to installation testing in Changhua livestock farm, and record of biogas generator during operation maintenance cost and encountered of other difficulties. In the cause of solve the problem of the hydrogen sulfide corrosion engine. This study converted diesel engine into biogas driven engine, engine converted Corrosion parts into corrosion-resistant materials and record process. In this study, the biogas engine modified as follows: It susceptible to hydrogen sulfide parts of corrosion include crankshaft bearing and connecting rod bearing, because the bearing contain copper metal, the bearing susceptible to hydrogen sulfide corrosion, so converted the copper alloy into Babbitt metal; Crankshaft material of oil seal is rubber, rubber case of sulfide will harden and inelastic, and then lose it original purpose, so it will converted the rubber into Silicone resin material oil seal; Biogas can't be spontaneous combustion to produce power, therefore need to install the spark plug. According to the biogas generator modified in the using, although, biogas generator of corrosion resistant is high cost of about NT200,000 dollars, not only it can reduce the cost of installing desulfurization equipment, but also it reduced maintenance costs up to about NT51,000 dollars per year.

並列關鍵字

Biogas generator ； Resist corrosion ； Hydrogen sulfide