초록 ▼

An improved process and article of manufacture to effectuate pressure reduction in a delayed coker charge heater's radiant heat section outlet and feedstock process coil, by upflowing coker feedstock through a single or double row, single or double fired, feedstock process coil. The innovative upflo

An improved process and article of manufacture to effectuate pressure reduction in a delayed coker charge heater's radiant heat section outlet and feedstock process coil, by upflowing coker feedstock through a single or double row, single or double fired, feedstock process coil. The innovative upflowing of coker feedstock as disclosed by the present invention allows BFW/Steam injection and vaporizing hydrocarbons to rise in the same flow direction as the coker feedstock, resulting in an enhanced mixing of fluid film and coker feedstock. Such enhanced mixing, in turn, increases heat transfer rates to the feedstock. As coker charge heater burners are commonly located in the bottom of the heater, the lower portion of the heater is typically the location of highest processing temperatures and tube side fouling. Upflowing the process coil places migrates the hottest processing section to a cooler location in the heater, and thus, contributes to conditions which reduce coking/fouling rates within the feedstock process coil, increase feedstock process coil tube life, reduce tube skin temperatures, and increase run time between decoking the interior portion of the feedstock process coil.

대표청구항 ▼

[ What is claimed is:] [1.]1. A delayed coker charge heater for heating a coker feedstock comprising:a first heating section providing convective heat to said coker feedstock;a second heating section adjacent to said first heating section, said second heating section having an upper half and bottom

[ What is claimed is:] [1.]1. A delayed coker charge heater for heating a coker feedstock comprising:a first heating section providing convective heat to said coker feedstock;a second heating section adjacent to said first heating section, said second heating section having an upper half and bottom half which provide radiant heat to said feedstock;a convection to radiant crossover connecting said first heating section and said second heating section via a second heating section feedstock inlet located generally in said bottom half of said second heating section and a first heating section outlet located generally in the lower portion of said first heating section:a horizontal feedstock heating conduit positioned within said second heating section to allow the upward flow of feedstock within said conduit;a second heating section outlet located generally in said upper half of said second heating section;a plurality of burners located generally in a lower portion of said second heating section, said burners positioned direct flame upwardly within said second heating section along a plane generally parallel to said horizontal heating conduit.