Absorption and regeneration overview
After the feed gas enters the battery limit, the impurities and droplets in the gas are removed by the filter separator, and it enters the absorption tower from the bottom. In the tower, it is countercurrent contacted with the MDEA solution sprayed from the top. The MDEA aqueous solution (amine lean solution) absorbs hydrogen sulfide and carbon dioxide in the natural gas, so that the hydrogen sulfide and carbon dioxide in the feed gas are removed to meet the technical requirements of the owner. The purified gas is sent out of the boundary through the product gas separator after leaving the top of the absorption tower.
Under the control of the liquid level regulating valve, the liquid level at the bottom of the absorption tower conveys the rich amine to the flash tank. The rich amine from the bottom of the absorption tower enters the flash tank. Most of the hydrocarbons absorbed into the rich amine are desorbed to the flash gas phase. Under the control of the pressure regulating valve, the flash steam is recovered to the fuel gas system. The rich amine liquid is sent to the lean/rich amine heat exchanger. The hot lean amine from the regeneration tower heats the rich amine from the flash tank, and then the rich amine enters the amine regeneration tower.
The steam generated by the reboiler at the bottom of the amine regeneration tower contacts the rich amine solution countercurrent, stripping the acid gas from it, thus completing the regeneration of rich amine. Under the control of the liquid level regulating valve at the bottom of the amine regeneration tower, the hot lean amine solution overflows to the lean/rich amine heat exchanger. The lean amine booster pump pressurizes the amine in the amine buffer tank by 1.0mpa and sends it to the absorption tower. A flow regulating valve is installed on the lean amine pipeline to the absorption tower, through which the lean amine flow into the absorption tower is controlled.
After removing the CO2 from feed gas, the gas feed gas will enter to natural gas dehydration tower to remove water.
Decarbonization skid-mounted device
|
S/N |
Equipment Name |
Specification |
Material
|
Qty |
Unit |
|
One |
Standard equipment |
|
|
|
|
|
1 |
Lean liquid pump |
|
Stainless steel |
2 |
Set |
|
2 |
Atmospheric pressure pump |
|
Stainless steel |
2 |
Set |
|
3 |
Submerged pump |
|
Stainless steel |
1 |
Set |
|
4 |
Precision filter |
|
Combination |
1 |
Set |
|
5 |
Regenerative gas cooler |
|
304 |
1 |
Set |
|
6 |
Lean rich liquid heat exchanger |
Plate |
304 |
1 |
Set |
|
7 |
Lean liquid cooler |
Plate |
304 |
1 |
Set |
|
Two |
Non-standard equipment |
|
|
|
|
|
1 |
Absorption tower |
|
304 |
1 |
Set |
|
2 |
Solution filter |
|
Q345R |
1 |
Set |
|
3 |
Regeneration tower |
|
304 |
1 |
Set |
|
4 |
Acid gas separator |
|
304 |
1 |
Set |
|
5 |
Solution tank |
|
Q235-B |
1 |
Set |
|
6 |
Flash tank |
|
Q345R |
1 |
Set |
|
7 |
Feed gas separator |
|
Q345R |
1 |
Set |
|
8 |
Purified gas separator |
|
Q345R |
1 |
Set |
|
Three |
Fillers, chemicals |
|
|
|
|
|
1 |
Stainless Steel Structured Packing |
|
|
|
M3 |
|
2 |
Filter activated carbon |
|
|
|
M3 |
|
3 |
MDEA |
|
|
|
M3 |
|
4 |
Activator |
|
|
|
M3 |
|
5 |
Defoamer |
|
|
|
M3 |
Rongteng specialize in gas field wellhead treatment, natural gas purification, LPG recovery, LNG plant and natural gas generator set.
Contact:
Sichuan Rongteng Automation Equipment Co., Ltd.
Phone/WhatsApp/Wechat : +86 177 8117 4421 +86 138 8076 0589
Website: www.rtgastreat.com Email: info@rtgastreat.com
Address:No. 8, Section 2 of Tengfei Road, Shigao Subdistrict,Tianfu New Area, Meishan city, Sichuan China 620564
.
Post time: Dec-03-2023
