Why use TEG in the coil?
It is more dangerous when there is a leak.
We use steam as heating medium.
You can extent the shaft of existing sulfur pump to pump out the sulfur in the pit.
We operate a VDU(Vacuum Distillation Unit)heater with COT
higher than 400C.
We would like to know the typical run-length of such heater in other refinery.
How to de-coke the plugging tube? By online spalling? or steam and air decoking? or Mechanical Pigging?
Please note that our VDU is a wet...
The medium pressure(14 barg) condensate in this refinery is sent to a condensate flash drum for recovery of low pressure(3.5 barg) steam.
We have found that the process unit which consume the LP steam near the condensate recovery unit suffer fluctuation of LP steam supply.
There is no flow...
We fire refinery fuel gas and fuel oil(Sulfur content 1%) in our CDU heater.
We operate soot blower in the convection zone(with studded fin tube) of the heater every day.
We inject ammonia to the SCR and in order to prevent NH3 slipping to the downstream Air Preheater, we control the SCR...
The flue gas from our CDU(Crude distillation unit) heater is heat exchanged with the heater inlet air.
The air preheater is a static type with cast iron fin tube in the upper section and glass tube in the lower section.
There is a DeNOx facility(SCR) upstream of the air preheater.
We...
We have a two stages overhead condensation design in our CDU.
The first stage inlet temperature is 150C and outlet temperature is 120C.
The second stage inlet temperature is 118C and outlet temperature is 60C.
The material for these condensers are Carbon Steel.
We encounter serious corrosion...
Dear Sir:
The burners are supplied by John-Zink.
The excess O2 is specified to be:
3% for Fuel Gas
4% for Fuel Oil
The burners are for forced draft heater.
The heater fire Refinery fuel gas with
auxiliary fuel oil.
Recently we invited two guests to our refinery for teaching us how to increase the combustion efficiency of our big CDU(Crude Distillation Unit) Furnace.
The burner of our CDU Furnace is Combo type, which can burn both Refinery Fuel Gas and Fuel Oil.
One guest suggest us to burn both Fuel Gas...
We have a Vacuum Distillation Unit in our refinery.
The operating temperature of the Vacuum Residue(Asphalt) pump is 350C.
The mechanical seal plan of the Vacuum Residue pump is:
Plan 32 with Seal Fluid: HVGO(Heavy Vaccum Gas Oil)
+ 52 with Seal Fluid: Synthetic Lub. Oil
As the seal...
We produce a penetration grade Asphalt from a Vacuum Distillation Unit(without Air Blowing) in our refinery.
The penetration of our Asphalt is 50~100.
Our customer claim that although our product meet the penetration specification of Asphalt, the Aging test show that our product has a higher...
I have heard that it is dangerous to do online spalling of furnace tube for Delayed Coker Plant in the refinery.
The reason is that there is a common convection section in the Coking Heater.
When one flow pass is under online spalling, the other flow pass is still running at its normal...
The fire is caused by the hot crude oil (140 C) leaking from the damaged mechanical seal, not the oil mist itself.
What I am saying is that poor oil mist distribution may cause failure of pump bearing which then induce a seal failure, and let crude oil leak to the air.
It is surely very easy...
We have a Vacuum Distillation Plant in our refinery.
The seal plan 32 is used for the bottom(Asphalt) pump of the distillation column.
Because some gas oil is injected to the process fluid in this pump. This may affect the quality of the final product Asphalt.
Is there any better seal plan in...
