Abstract:

Impermeable graphite used in chemical equipment is with strong corrosion resistance, nice electric conductivity, nice heat conductivity, small coefficients of expansion. Compared with expensive metal material which has same advantages as above, graphite is cheaper, so graphite equipment is widely used to dealing with HCL acid, H₂SO₄ acid, acetic acid, phosphoric acid and other corrosive fluid. Besides pesticide industry, graphite equipment is widely used in chemical fertilizer industry, dye industry, petrochemical industry, metal smelting industry, food industry and others. Graphite equipment is used in heating, cooling, condensing, evaporating and absorbing sectio。

Key words: impermeable graphite, sealing, structure

摘要：

目前化工设备中使用的不透性石墨具有优异的耐腐蚀性、导电、导热，线膨胀系数小，耐温度聚变等性能。介于不透性石墨的优点不仅仅单一地是为了节约不锈钢和贵重的有色金属材料等，而是使用不透性石墨设备可以获得综合利益。石墨设备广泛地用于处理盐酸、硫酸、醋酸和磷酸的腐蚀性介质。除了主要用于酸碱农药的工业外，还广泛地应用于化肥、染料、石油、化工、有机合成、金属冶炼、金属表面加工、无机药品、制药、食品和原子能等领域。在众多的利用领域里，不透性石墨化工设备的密封结构选择不合理会导致设备的泄漏。本文简述了不透性石墨设备各种密封结构，为不透性石墨设备在用于加热、冷却、冷凝、蒸发、合成和吸收等各种化工单元工况时提供参考。

关键词: 不透性石墨, 密封, 结构