沼氣是一種混合可燃?xì)怏w，一般情況下，沼氣的主要成分是甲烷和二氧化碳。此外，還有少量的氫、一氧化碳、氮、硫化氫等氣體。甲烷含量占50%至70%，二氧化碳約占30%至40%左右。硫化氫含量在4000-5000ppm。
Biogas is a kind of mixed combustible gas. Generally, the main components of biogas are methane and carbon dioxide. In addition, there are a small amount of hydrogen, carbon monoxide, nitrogen, hydrogen sulfide and other gases. Methane accounts for 50% to 70%, and carbon dioxide accounts for about 30% to 40%. The hydrogen sulfide content is 4000-5000ppm.
1、沼氣的爆炸性
1. Explosiveness of biogas
一般可燃?xì)怏w都易與空氣形成爆炸混合物，遇到明火就會(huì)爆炸，造成設(shè)備和人身事故。在使用沼氣時(shí)，輸送、貯存等沼氣設(shè)施要求有較好的密封性及防爆措施。
Generally, combustible gas is easy to form explosive mixture with air, and will explode when encountering open fire, causing equipment and personal accidents. When biogas is used, transmission, storage and other biogas facilities are required to have good sealing and explosion-proof measures.
2、沼氣的毒性
2. Toxicity of biogas
密閉空間中所含甲烷濃度高，使氧氣含量下降，就會(huì)使人發(fā)生窒息，嚴(yán)重者會(huì)導(dǎo)致死亡。若空氣中的甲烷含量達(dá)到25--30%時(shí)就會(huì)使人發(fā)生頭痛、頭暈、惡心、注意力不集中、動(dòng)作不協(xié)調(diào)、乏力、四肢發(fā)軟等癥狀。若空氣中甲烷含量超過(guò)45-50%以上時(shí)就會(huì)因嚴(yán)重缺氧而出現(xiàn)呼吸困難、心動(dòng)過(guò)速、昏迷以致窒息而死亡。
The high concentration of methane in the confined space will reduce the oxygen content, which will lead to asphyxia and death in serious cases. If the methane content in the air reaches 25-30%, people will suffer from headache, dizziness, nausea, inattention, uncoordinated movement, fatigue, limb weakness and other symptoms. If the methane content in the air exceeds 45-50%, it will cause dyspnea, tachycardia, coma and asphyxia due to severe hypoxia.
注意事項(xiàng)。
matters needing attention.
1.沼氣脫硫設(shè)備應(yīng)由專人看管，沼氣管道上的所有閥門(mén)需要由專人進(jìn)行調(diào)節(jié)。
1. The biogas desulfurization equipment shall be watched by a specially assigned person, and all valves on the biogas pipeline shall be adjusted by a specially assigned person.
2.沼氣脫硫設(shè)備附近應(yīng)做到良好通風(fēng)，以防設(shè)備附近沼氣聚積。
2. Good ventilation shall be provided near the biogas desulfurization equipment to prevent biogas accumulation near the equipment.
3.沼氣脫硫設(shè)備附近嚴(yán)禁動(dòng)用明火。
3. Open fire is prohibited near the biogas desulfurization equipment.
4.沼氣脫硫設(shè)備長(zhǎng)期停用應(yīng)將沼氣管上的所有手動(dòng)閥門(mén)關(guān)閉。
4. When the biogas desulfurization equipment is out of service for a long time, all manual valves on the biogas pipe shall be closed.
5.定期檢查沼氣管道上所有閥門(mén)的密閉性，防止發(fā)生沼氣泄漏事故。
5. Regularly check the tightness of all valves on the biogas pipeline to prevent biogas leakage accidents.
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