Analysis of the recovery and utilization of waste heat from an acrylonitrile plant incinerator

An analysis is conducted of the irrational factors concerning the utilization of waste heat energy produced after the wastewater is burned by using an old acrylonitrile plant incinerator. A scheme is proposed to additionally install a horizontal incinerator and to use heat-conduction oil as a heat carrier to recover and utilize the waste heat produced after the incineration of waste water. Expounded are such problems as the corrosion of heat conduction oil furnace-tubes during the operation of the waste heat recovery system and scale deposit formed on furnace tubes and their underlying causes. The furnace tube corrosion problem has been solved through a change in waste water incineration flow path and the implementation of separate incineration of different flows of waste water. The problem of scale deposit formation on furnace tubes was solved by additionally installing soot blowers on the new incinerators, thus attaining the aim of rationally utilizing the waste heat produced by the incinerators.