Filming Corrosion Inhibitor for DSG System

Dilution Steam Generators in ethylene plants have had problems either of fouling and corrosion. Gas Crackers have typically had separation issues with Tar in the quench water system. Emulsified hydrocarbons with coke and other organic acids have been posing corrosion and fouling in this system. Costs of letting down utility steam to be used as dilution steam have had significant impact on Dilution Steam runlengths. Using caustic to neutralize pH in the dilution steam system has it's issue of sodium carry-over into the furnaces resulting in damage to the alloy tubes.

A unique and novel approach of using an effective corrosion inhibitor in combination with other products to keep the water quality clean has resulted in good corrosion and fouling control. This paper will discuss this approach and the benefits that it provides to olefins producers due to improved and reliable corrosion/fouling control.

The problem that is encountered in most of the heat exchangers in the dilution steam system can be very reliably resolved with this unique approach and a typical case study will be shared to discuss these findings.