锌精馏铅塔冷凝器换热数学模型研究

Study of Capacity of Heat Transfer about Condenser of 1# Lead Column in the Zinc Refining

针对冶炼厂锌精馏过程中铅塔冷凝器实际冷凝能力明显比其设计容积热负荷低,但却不能避免冲顶事故的发生.目前仅通过坼除冷凝器顶部防爆装置以提高散热强度的现状,根据二系统1#铅塔冷凝器不同散热方式;通过对器壁散热状态的测试,并利用能量守恒原理,建立了冷却过程的换热数学模型;该模型充分考虑了各种散热方式的换热能力,较为全面地反映了冷凝器目前的换热状况,为冷凝器强化传热和结构优化,提高冷凝器的有效容积热负荷具有一定的现实意义.

The actual condensing capacity of the condenser of 1# lead column is evidently smaller than the bulk-thermodynamics burden, but the condenser always keeps away from breaking the top in. At present the flame proof device and defence roof at the top of the condenser have been cancelled to strengthen radiating heating intensity to enhance the output. According to the means of heat transfer of the condenser of 1# lead column, the radiating state of the condenser is measured, and a mathematical model of heat transfer on the condensation of zinc vapor in the condenser based on the principle of energy conservation is proposed. This model sufficiently considers the ability of the means of heat transfer, and accurately reflects the conditions of heat transfer. Some important results about reinforcement of heat transfer and optimize of the tuctrue of the condenser have been pointed.