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DeltaValve retractable center feed injection device

The introduction of DeltaValve’s fully automated coke drum unheading valve in 2001 necessitated the development of side feed entry into the coke drum. No longer was it possible to feed resid into the coke drum through the bottom  ange as was standard with traditional manual or semi-automated unheading systems.

Over the years, various styles of side feed entry technology emerged: single inlet, dual inlet, and others, some with straight feed lines, or angled/curved feed lines, each netting different resid  ow pattern results. Questions began to arise in the industry about how new side feed  ow patterns compared to the traditional bottom center feed  ow patterns. Additional questions were raised regarding the impact on the coke drum wall opposite the side feed inlet. Always the innovator, DeltaValve evaluated these issues and developed the retractable center feed injection device.

Compared to feeding resid directly from the side, independent studies have shown that feeding into the drum directly up the center may contribute to a reduction in overall drum stresses, formation of local hot-spots, and top head blowouts. These theories are based on center feed analysis data which indicates that center feeding develops more centralized ow channels which improves quench water distribution. Improved  ow channeling can produce shorter quench cycles while minimizing the thermal stresses experienced by the drum walls. In addition to the safety bene ts, the retractable center feed injection device is engineered to maximize coke drum life and minimize downtime and maintenance.

The retractable center feed injection device combined the necessity of side feed entry with the desired results of traditional bottom center feed systems. Data from installed units has con rmed signi cant improvements in thermal distribution and thermal transients. Additionally, operational data has con rmed improvements to drum movement, drilling pro les, quench times, and structural vibration. In summary, this translates into a signi cant extension of the calculated operational life of coke drums.

Sponsor : DeltaValve

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DeltaValve retractable center feed injection device

The introduction of DeltaValve’s fully automated coke drum unheading valve in 2001 necessitated the development of side feed entry into the coke drum. No longer was it possible to feed resid into the coke drum through the bottom  ange as was standard with traditional manual or semi-automated ...