1、 I 摘摘 要要 在工业生产中，工艺过程往往要求在一定的温度下进行。因此热交换 器的应用是比较广泛的。生产中许多物料要进行预热或加热，如在工艺生 产中，工艺介质需加热或预热到给定值，若高于给定值物料会发生分解、 自聚，低于给定值会发生凝结。而工业生产中为了冷却，就会产生大量的 冷却水（有一定温度的热水） ，本文就如何通过热交换器利用热水（工业 冷却水）余热进行热交换的自动控制系统作了设计，目的是充分利用余热， 只有当用热水加热不能满足出口温度要求时，才使用蒸汽补充加热。这是 一种节省能源，降低能耗的设计方案，也应合了当今工业生产中节能控制， 提高经济效益的指导思想。 关键词关键词 余热利用，自
2、动控制，分程控制，设计 II ABSTRACT In industrial production processes often require a certain temperature. Therefore, the application of the heat exchanger is more extensive. The production of many materials to be preheated or heated, as in the process of production, the process medium to be heated or preheate
3、d to a given value, if it is higher than a given value of the material will decompose, self-polymerization occurs below the setpoint condensation. Industrial production, will produce a large amount of cooling water (with a constant temperature of hot water), in order to cool this article on how to u
4、se the waste heat of the hot water (cooling water) through a heat exchanger for automatic control system of the heat exchange made in the design, aims to make full use of waste heat, when heated with hot water outlet temperature can not meet the requirements, the use of steam supplemental heating, this is the way to save energy and reduce energy consumption design. Also should be combined energy-saving control in todays industrial production, improving economic efficiency guiding ideology. K
