1. In-feed and Amine Sweetening 11/4/09
TEAGUE TREATING PLANT
In-feed and
Amine Sweetening
11/4/09

5. Intended Gas Pressure- 800 to 875 psig
Intended Flows- 330 MMSCFD
Expected Gas Composition ~400 ppm H2S, ~3% CO2

6. Primary Separation
Increased diameter
velocity reduction
Gravity
Intended Level- 10% to 70% of span
Intended Gas Pressure- 800 to 875 psig
Intended Gas Flow - 330MMSCFD

7. 1 Micron filter
Critical to performance of amine contactor
Removes residual contaminants prior to gas treatment
Intended Level- 10% to 70% of span
Intended Gas Pressure- 800 to 875 psig
Intended Gas Flow - 330MMSCFD

8. This slide shows the Inlet Gas flow through the shell side of the Feed Heater and into the Amine Contactor. It will also explain how the Amine Contactor is used to put the Inlet Gas in contact with the Lean Amine and absorb the Acid Gas from the Inlet Gas.
Untreated Gas Flow
Amine Contactor
Amine Contactor Feed Heater (exchanger)

9. Amine Contactor Feed Heater (exchanger) 4
Purpose: To recover the heat from the Treated Gas and exchange with the Inlet Gas so that the Inlet Gas can approach the Lean Amine temperature. By exchanging the warmer Treated Gas (the gas coming out of the Amine Contactor) with the cooler Inlet Gas, the Inlet Gas is warmed up to a temperature that approaches the Lean Amine temperature. It is desirable that the Inlet Gas and the Lean Amine temperatures be within 10 DEGF of each other.
Inlet Gas flows through Shell Side of exchanger through the baffles and around the tubes. Warmer Treated Gas is flowing through the tubes.
Inlet Gas from Inlet Filter to Shell Side of the Amine Contactor Feed Heater (exchanger)

10. Shell and Tube Heat Exchanger Maintain Gas Inlet Temp
Maximize utilization of BTU’s = <$
To Amine Contactor A
Sour Gas Outlet
From Inlet Filter C
Sour Gas Inlet
From Inlet Filter
To Amine Contactor

11. This drawing shows the Treated Gas Flow from the Amine Contactor through the final equipment to Sales.
Treated Gas Flow
Amine Contactor Overhead Scrubber
Amine Contactor Gas Cooler
Amine Contactor Feed Heater
Gas to Gas After Scrubber

12. Inlet Gas moves up through the 20 trays and the Acid Gas is removed from the Inlet Gas to the Sales Gas specification levels by coming in contact with the liquid Lean Amine on each tray. The Lean Amine absorbs the Acid Gas into solution.
Amine Contactor
Inlet Gas from Amine Contactor Feed Heater (exchanger) entering Amine Contactor
Treated Gas Leaving top of Amine Contactor and going to the Overhead Scrubber

13. Intended Level- 10% to 70% of span
Intended Gas Pressure- 800 to 875 psig
Intended Gas Flow - 330MMSCFD
12 Trays total
4 solvent inlets for CO2 slip
at Trays #1, #3, #5, and #7

14. Amine Contactor Lean Amine Feed Points
This Amine Contactor has four (4) different feed point for the Lean Amine to enter. This is to allow for CO2 slippage. The top feed point will produce the least amount of CO2 slippage and the lowest feed point will produce the greatest amount of CO2 slippage. If more CO2 is being absorbed out of the Inlet Gas into the Lean Amine than is required (exp. Pipeline specification is 2% and the actual Sales Gas is at 1.6%) then by lowering the Lean Amine feed point, some of the CO2 could be “slipped” through the Contactor and thereby moving the Sales Gas CO2 concentration (from the 1.6%) closer to the actual Pipeline specification (2%) saving operational costs.
Amine Contactor Lean Amine Feed Points
Top Lean Amine Feed Point going in on Tray # 1
Second Lean Amine Feed Point going in on Tray # 5
Third Lean Amine Feed Point going in on Tray # 9
Bottom Lean Amine Feed Point going in on Tray # 13
Lean Amine flow to Amine Contactor feed points.

15. Amine Contactor Lean Amine Feed Points and Time
Top Lean Amine Feed Point
Top Feed
Second Lean Amine Feed Point
Third Lean Amine Feed Point
Bottom Lean Amine Feed Point
Bottom Feed
Length of time the gas is in contact with the Amine
The Lower the Lean Amine Feed point that is used to deliver the Lean Amine into the Contactor, the more CO2 that can be slipped. It is a function of TIME. It takes TIME for the CO2 to be absorbed from the Inlet Gas into the Amine. The lower the Feed Point the less time the Inlet Gas is in actual contact with the Amine. Therefore if it is necessary to “slip” CO2 from the Inlet Gas (leave more CO2 in the Inlet Gas), lowering the Lean Amine feed point is one effective way to do so.
Inlet Gas

16. Amine Contactor Lean Amine Feed Points and Trays
Example shows Lean Amine going into the Top Feed Valve. Other Feed Valves Closed.
Four (4) different Lean Amine feed points into Amine Contactor.
Typical diagram of Bubble Cap Trays
Lean Amine enters on Tray #1. The liquid amine level is set by the height of the weir plate on each tray (this is typically in the 2” range). As the liquid amine level rises it will spill over the tray weir and travel down the downcomer onto the next tray. These trays can be either “sieve” or “bubble cap” type trays. The Inlet Gas enters in the bottom of the Contactor and moves up through the trays, coming in contact with the Amine on the trays. As this contact between the Lean Amine and the Inlet Gas occurs, the Acid Gas (CO2 & H2S) is absorbed from the Inlet Gas. As the Inlet Gas travels up the trays and the Lean Amine moves down the trays; the Inlet Gas becomes the Treated Gas and the Lean Amine becomes the Rich Amine.

17. Amine Contactor “Bulge Temperature”
Example shows Lean Amine going into the Top Feed Valve. Other Feed Valves Closed.
130
135
140
145
150
155
160
165
170
125
120
115
Typical Temperatures in DEGF of the Gas as it moves through the Tower. This example assumes an Inlet Gas Temperature of 110 DEGF and a Lean Amine Temperature of 120 DEGF
Four (4) different Lean Amine feed points into Amine Contactor.
BULGE TEMPERATURE
The Acid Gas being absorbed from the Inlet Gas into the Amine is a chemical reaction and the energy expended from this chemical reaction is in the form of heat. Under normal operations the greatest chemical reaction and thereby the highest temperature should occur at about the half way point of the Inlet Gas’s travel up through the trays ( in the middle of the Tower). The point at which this high temperature occurs in the Tower is known as the “Bulge Temperature”. The bulge temperature location in the Tower can be a good indication of the overall operation of the Contactor.

18. Amine Contactor Integral Overhead Scrubber
Treated Gas to Overhead Scrubber
Amine Contactor Integral Overhead Scrubber
Internal Head
Treated Gas to Amine Contactor Gas Cooler
Internal Overhead Scrubber

19. Amine Contactor Overhead Scrubber
The Treated Inlet Gas leaves the top of the Amine Contactor and enters the Overhead Scrubber. This is an internal vessel to the Amine Contactor. There is an internal head separating the Amine Contactor from this Scrubber. The purpose of this scrubber is to remove liquid amine that is carried over the top of the Amine Contactor.
Treated Gas leaving the top of the Amine Contactor and entering the integral scrubber in the bottom of the Tower.
Internal head separating Amine Contactor from the Overhead Scrubber.

20. Amine Contactor Overhead Scrubber
The Treated Gas leaves the Amine Contactor (internal) Overhead Scrubber and goes to the Amine Contactor Gas Cooler
Treated Gas to Amine Contactor Gas Cooler

21. This drawing shows the Treated Gas Flow from the Amine Contactor through the final equipment to Sales
Treated Gas Flow
Amine Contactor Overhead Scrubber
Amine Contactor Gas Cooler
Amine Contactor Feed Heater
Gas to Gas After Scrubber

22. Intended Level- 10% to 70% of span
Intended Gas Pressure- 800 to 875 psig
Intended Gas Flow - 330MMSCFD
12 Trays total
4 solvent inlets for CO2 slip
at Trays #1, #3, #5, and #7
To Sweet Gas Inlet

23. Amine Contactor Gas Cooler
Treated Gas to Amine Contactor Feed Heater (exchanger)
Amine Contactor Feed Heater (exchanger)
Amine Contactor Gas Cooler
Amine Contactor Gas Cooler
Treated Gas existing the Amine Contactor Gas Cooler and traveling to the shell side of the Amine Contactor Feed Heater. This Amine Contactor Gas Cooler provides some additional cooling of the Treated Gas prior to entering the Amine Contactor Feed Heater. This provides additional flexibility in controlling the Inlet Gas temperature existing the tube side of the Amine Contactor Feed Heater. If additional heat is needed in the Inlet Gas entering the Amine Contactor, Operations can simply turn off some fans and this will provided the extra heat.

24. This drawing shows the Treated Gas Flow from the Amine Contactor through the final equipment to Sales.
Treated Gas Flow
Amine Contactor Overhead Scrubber
Amine Contactor Gas Cooler
Amine Contactor Feed Heater
Gas to Gas After Scrubber

25. Shell and Tube Heat Exchanger Maintain Gas Inlet Temp
Maximize utilization of BTU’s = <$
From Gas Cooler B
From Gas Cooler
To Gas Afterscrubber
Sweet Gas Inlet D
Sweet Gas Outlet

26. Treated Gas to Gas to Gas After Scrubber
Amine Contactor Feed Heater (exchanger) Treated Gas flow to Gas to Gas After Scrubber
Treated Gas flow from tube side of Amine Contactor Feed Heater (exchanger) to the Gas to Gas After Scrubber. The flow is from the tube side of the exchanger.

27. This drawing shows the Treated Gas Flow from the Amine Contactor through the final equipment to Sales.
Treated Gas Flow
Amine Contactor Overhead Scrubber
Amine Contactor Gas Cooler
Amine Contactor Feed Heater
Gas to Gas After Scrubber

28. Recover condensed liquids
Final process step before gas enters refrigeration
Water removed using cold temperatures
To Refrigeration Plant Gas/Gas Heat Exchangers
From Amine Feed Heater

29. THIS IS A SUMMARY PAGE OF THE GAS FLOW IN AN AMINE PLANT.
Treated Gas
Un-Treated Inlet Gas

30. Walkthrough Video