MaxiCoking Technology™

Breakthrough Technology for Improved Existing Delayed Coker Performance

Foam Reduction in Petroleum Cokers, US Patent 6,117,308:

A method of producing petroleum coke in a petroleum coking system comprising the steps of (a) adding a fluid to live coking drum while warming a second drum so that additional vapor is provided in the live drum and (b) reducing pressure loss in the live drum by regulating the addition of the fluid based upon a target pressure for the live drum and by regulatingthe flow of warm-up vapor from the live drum to the second drum based upon a target pressure for second drum.

MaxiCoking Technology Provides:

Constant coking drum pressure operation
Constant drum vapor velocity; eliminates foam formation & foam expansion in drum during coking operation
Provides additional vapor for drum warm up process

Constant Pressure System - Detailed Drawing

Constant Pressure System - Detailed View

Drum Warming in Petroleum Cokers, US Patent 6,764,593B1:

The new warm-up system operates to provide additional hot vapor material for warming the empty drum. Further, the new warm up system operates to more effectively preserve the temperature and motive pressure of the warm-up vapor. Thus, a drum switchover temperature of 700+ºF can be consistently achieved. Moreover, the desired warm-up temperature is achieved in a shorter period of time.

Constant Pressure System - New Warmup System

MaxiCoking Technology Provides:

Faster warm-ups. Drum warm up time is measurably reduced to provide additional “on-stream” time
Reduction of foam & condensate formation during drum warm-up as “slop production”, poor fractionator performance as “recycle production” and after drum switching as “front foam production”
Eliminate Antifoam Silicon usage

Drums Warm Up Line Connection Options

New Drum Warm Up System - Detailed Drawing

Alternative Foam Carry Over Option

The new warm-up system operates to provide an alternative foam carry over place during warm up and quenching process, which saves the Fractionator or Blowdown Systems.

During the warm up of drum “B” and steam purging process of drum “A”, if the foam expansion level is noticed, we will increase the set pressure of PC “A” by 10-20 psig more than operation pressure, so the foams/fines will be pushed into the empty drum “B” via the new warm up line which is already open. During water quenching, the PC “A” will controls the quench water flow.

MaxiCoking Technology Provides:

Empty drum will become an alternative option for foam carrying over during warm up process and quenching instead of Fractionator System or Blowdown System

Shorter Coking Cycle Will Reduce the Blowdown System Loading

A coker unit of 21,300 BPSD vacuum bottom feed rate at 32 psig coking drum pressure and 925 °F heater outlet has produced 836 short tones of coke per drum in 16 hour coking cycle.

Comparison of Blowdownvapor feed rate at shorter cycle of 12 and 10 hour will indicate the less Blowdown vapor feed rate loading (assuming the coker feed properties and operation conditions are the same); please refer to chart below.

	Coking Cycle	Coking Cycle	Coking Cycle
	16 Hour	12 Hour	10 Hour
Coker Feed Rate, BPSD	21,500	21,500	23,000
Coke Product, Shot tons per drum	836	627	523
Quench Cycle, hour	6	6	6

	Lb/hr	Lb/hr	Lb/hr
Steam	100,320	75,240	62,760
Wax Tailings	10,032	7,524	6,276
Non Condensibles	334	251	209
Lt. Slop	7,524	5,643	4,707
Total Blowdown Vapor Feed	118,210	88,658	73,952
OVHD Cooler, BTU/hr	1,529,880	1,147,410	957,090
Bottom Reboiler, BTU/hr	145,069,207	108,801,905	90,755,018

MaxiCoking Technology Provides

Reduces the Blowdown loading rate by 33% at same current coker throughput
OR
Increases the coker throughput by 33% at the same current Blowdown load

US CokerTech engineers and management have more than 35 years Delayed Coker operation and design experience.

Our services include the following:

We access the latest Delayed Coker equipment specification and simulation programs to evaluate the pumps, compressor, vessels, heat exchangers, fractionator, heaters, and PSVs, etc.
We are implementing our own latest patented technologies.
We are capable to evaluate your coker system and make recommendations for modification; and to apply the latest patented technology. This would allow for increased capacity, liquid recovery and to operate more efficiently and reliably over time.