EQUIPMENT, GAS TREATMENT
Produced gas is generally dehydrated using dewatering agents such as triethylene glycol (TEG) and other similar products. Solid desiccant dehydration is an alternative technology for gas dehydration by using moisture-absorbing salts to remove water from the gas, such as CaCl2.
Wet gas enters the bottom of CaCl2 dehydrator, below the desiccant bed. it flows up throught the solid CaCl2 bed and gets in contact with the surface of the desiccant pellets which removes water vapor from the gas.
Other Desiccants can be used such as potassium and lithium chlorides. These salts naturally attract and absorb moisture and gradually dissolving to form a brine solution.
Several process and economical analysis have shown that dehydration using the desiccant dehydrators is cost effective than using glycol dehydration especially in low gas flow rates (less than 1~2 MMSCFD).
Benefits of using desiccant dehydration process doesn’t deal only with CAPEX but also with OPEX as it doesn’t require fuel gas for regeneration and maintenance, and operation costs are very low.
Unlike the glycol dehydration, use of desiccant dehydration has more advantage regarding the conservation of the environment as there is no continuous emission of vent gas to the atmosphere like in glycol regeneration.
- Dehydrator Vessel/Tower
- Vessel Internals (Gas Distributor, Desiccant Bed Supports, …)
- Pressure Indicator
- Temperature Indicator
- Level Controller
- Level Control Valve
- Desiccant Filling Nozzle
- Lifting Lugs
- Structural Skid
- Electronic Instrumentation and Control
- Onshore and Offshore Fields
- Early Production Facilities
- Permanent Production Facilities
- API 12J
- ASME VIII
- ASME B31.3
- ASME B16.5
- NACE MR 0175