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High Performance Fouling Control at Oil Quench Towers
The challenge
The oil quench tower at ethylene units is an unspared unit to achieve the cooling of the cracked gas by oil quench and to produce thereby the necessary amount of dilution steam.
The instable character of the cracked gas is caused by highly reactive monomers. Their
subsequent degradation to coke products and the entrained coke particles from the transfer line exchangers lead to severe fouling of the oil quench tower.
The consequences of fouling are less heat transfer, higher cracked gas temperature to the compressor, higher quench oil make up rates, higher viscosity, foaming, emulsification at pygas separator and higher fouling rates at the DSG system.
Fig 1: Quench Oil Tower
An efficient technology for fouling inhibition is required to prevent coke formation and to deactivate polymerization
initiators, reactive components and their impact on higher viscosity. Therefore, it is essential to understand the sources of the fouling.
The solution: 
Kurita´s latest antifoulant generation is based on a multifunctional blend of antipolymerant, antioxidant, dispersant, metal deactivator, coke suppressant and
viscosity improver.
stands for a reliable fouling inhibition at trays, heat exchangers, pumps and in the quench oil pot and loop.
The product is highly thermal stable and is focussing on the instable components like styrene, indene, phenantrene and pyrene. is field proven and shows an outstanding performance compared to generic antifoulants on the market.
Additionally, Kurita provides a reliable monitoring service adjusting the treatment during the running process.
Your benefits at a glance
- Reduced maintenance and extended run length
- Reliable oil quench tower operation
- Improved heat transfer efficiency and energy savings
- Reduced compressor steam demand
- Reliable DSG generator operation