Example of a Typical Pump Around Section. This higher level of heat can then be utilized in the process for improved energy recovery and higher overall plant efficiency, sometime called specific energy consumption. Additional benefits include reduced tower diameter at the column upper sections and the recovery of heat at a higher temperature. The use of heat transfer sections or pump rounds results in a better distribution of tower loads than if all of the heat were removed in the tower overhead. Typically quench towers utilize one or more heat transfer sections or pump rounds to remove heat from the column. The reactor effluent from the process requires cooling for further fractionation and therefore the temperature is reduced or quenched. The authors will examine the history of quench oil and quench water tower s successful and not successful case studies and lessons than can be learned from each of the cases.Ĥ Introduction of Quench Towers There are many process unit quench towers including Fluidized Catalytic Cracking Units, Vinyl Chloride Monomer Units, Ethylene Oxide, Ethylene lycol and Ethylene Pyrolysis Cracking Units. These designs have run continually for eight years, with previous designs in these revamped columns having less than one year run length. One of the most reliable designs has been the one developed in 1998 (1). iven this combination, the guidelines for designing this column have to be flexible yet sturdy to handle each of the challenges. Almost all of the challenge areas of distillation are concentrated into one column system high temperature, solids, fouling potential, oxygenates, polymerization potential, heat removal by pump arounds, and a mixture of Hydrogen, Steam, and C1 to C20s. Olefin Plant Quench Water Systems Case One Example - US ulf Coast Quench Water Tower Case Two Example - US ulf Coast Quench Water Tower Case Three - Light Naphtha Crackers uidelines for Increased run length Conclusions 16ģ Abstract Ethylene quench oil and quench water towers may have the highest failure rates in fractional distillation due to the rigorous service that these tower perform. Quench Tower Fractionation Device Selection 9 5. Wai Kiong Ng Institute of Chemical and Engineering Sciences Singapore Jun H Chan TC Process Technology Pte Ltd Singapore Jeff N ray KLM Technology roup AustraliaĢ Table of Contents 1. Zygula Chee Mum Tham TC Process Technology Pte Ltd Singapore Dr. 1 Design uidelines for Ethylene Quench Towers Karl Kolmetz TC Technology LP Houston Timothy M.