Feed Gas Review · Pretreatment · Dehydration · Treatment · Downstream Handover
Natural Gas Dehydration & Treatment
LINSON OIL develops project-specific natural-gas treatment packages covering feed-gas conditioning, dehydration-route selection, regeneration and utility integration, optional sweetening/filtration interfaces, and downstream handover to compression, recovery, LNG/NGL or other gas-processing systems.
Molecular-sieve and TEG dehydration are both directly supported product routes. The final treatment scheme is selected from feed composition, pressure/temperature, required outlet condition, contaminants, utility availability, downstream process requirements and project battery limits—not from one universal dew-point or capacity claim.
Feed Gas Conditions
Dehydration starts with knowing what enters the package.
The feed-gas composition and operating envelope determine whether filtration, liquid removal, acid-gas treatment, heating/cooling or another pretreatment step is required before dehydration.
Water & Liquid Carryover
Provide inlet water condition, free-liquid risk, condensate/hydrocarbon carryover and any upstream separation information.
Pressure / Temperature / Flow
Normal, minimum, maximum and design conditions should be identified where available to establish the process envelope.
Gas Composition / Contaminants
Gas composition, H2S/CO2 if present, heavy hydrocarbons, solids and other contaminants affect route and material selection.
Downstream Requirement
Pipeline, compression, gas recovery, NGL/LNG or other downstream processes may require different outlet conditions and pretreatment boundaries.
Dehydration / Treatment Route
Select the process route from feed gas to downstream acceptance.
The route below is a decision framework, not a fixed PFD. Pretreatment, dehydration, regeneration and polishing/treatment stages are included only where required by the project basis.
- 01 / CONDITION
Condition the Feed
Remove or control free liquids, solids and other upstream contaminants as required for the selected dehydration route.
- 02 / DEHYDRATE
Select Molecular Sieve or TEG
Choose the dehydration principle from outlet requirement, feed condition, utilities, regeneration method and downstream process need.
- 03 / TREAT
Add Treatment Where Required
Sweetening/desulfurization, filtration or other treatment steps are evaluated only when feed composition and project specification require them.
- 04 / HANDOVER
Deliver to the Next Process
Define product-gas conditions and interfaces to compression, recovery, LNG/NGL, pipeline or other downstream facilities.
Molecular Sieve vs TEG
Two supported dehydration routes, selected for different project requirements.
No route is presented as universally better. The engineering decision depends on the required outlet condition, feed-gas contaminants, operating envelope, regeneration/utilities and downstream process.
| Selection Factor | Molecular Sieve Route | TEG Route |
|---|---|---|
| Dehydration principle | Adsorption-based dehydration with cyclic bed regeneration. | Glycol absorption with circulation and regeneration of the glycol solution. |
| Typical decision driver | Evaluated when the downstream process requires an adsorption-based, deeper dehydration route. | Evaluated when a glycol absorption route fits the required gas-treatment duty and operating basis. |
| Feed sensitivity / pretreatment | Pretreatment and protection of the adsorbent are reviewed against liquids, solids and other contaminants. | Inlet separation/filtration and glycol-system protection are reviewed against the actual feed condition. |
| Regeneration / utilities | Requires a defined regeneration-gas/heating/cooling sequence and associated controls. | Requires glycol circulation, regeneration and associated heating/cooling/utility interfaces. |
Pretreatment, Regeneration & Utilities
The dehydration unit is only one part of the operating system.
Stable operation depends on how inlet conditioning, regeneration, heating/cooling, instrumentation, controls and downstream handover are integrated with the selected dehydration process.
Inlet Separation / Filtration
Coordinate free-liquid and solids control with the selected dehydration/treatment route.
Regeneration System
Adsorbent-bed or glycol regeneration requirements are configured from the selected process basis.
Heating / Cooling / Utilities
Define fuel, electrical power, heating/cooling medium, instrument air and other utilities as applicable.
Instrumentation / Control
Sequence, switching, level/pressure/temperature control, alarms and package interfaces follow the project control philosophy.
Battery Limits
Clarify every gas, liquid, utility and control interface.
Feed Gas Inlet
Tie-in conditions, upstream separation, gas composition, flow/P/T basis and upstream control responsibility.
Product / Off-Gas / Liquids
Dry-gas destination, regeneration/off-gas handling, condensate/liquid drains and downstream acceptance conditions.
Utilities
Power, fuel/heating medium, cooling, instrument air, nitrogen or other project-defined services.
Control / Site
Package control boundary, hazardous-area basis if specified, plot/transport restrictions, field installation and commissioning scope.
Engineering Inputs
Define the outlet requirement before finalizing the treatment route.
When data is incomplete, the engineering review should first identify the missing feed, outlet and utility conditions needed for route selection.
Feed Composition
Gas composition, water condition, H2S/CO2 if applicable, heavy hydrocarbons, solids and other contaminants.
Operating Envelope
Normal/min/max/design flow, pressure, temperature, turndown and startup/shutdown basis.
Required Outlet / Downstream Process
Required moisture/dew-point basis or downstream specification, plus compression, pipeline, NGL/LNG or other destination.
Project Documents
Process Data, P&ID, Data Sheet, Technical Specification, Equipment List, GA/plot plan, utility summary and inspection/FAT requirements.
Project & Evidence
Direct evidence covers molecular-sieve dehydration, TEG equipment resources and gas-treatment packages.
The Shunbei No. 5 project source directly documents a molecular-sieve dehydration skid with molecular-sieve dryers, regeneration system and automatic-control functions. LINSON OIL's primary source also lists both molecular-sieve and TEG dehydration, while Xilong's certified management-system scope explicitly includes TEG dehydration equipment and desulfurization units.
Evidence Boundary
Project-specific outlet moisture, dew point, adsorption cycle, regeneration temperature, acid-gas removal performance or throughput must not be presented as universal LINSON OIL guarantees.
Related Equipment
Equipment modules used to build the gas-treatment route.
Final selection and sequence depend on feed gas, required outlet condition and downstream process.
Molecular Sieve Gas Dehydration Unit
Adsorption-based dehydration with project-defined pretreatment and regeneration scope.
TEG Gas Dehydration Unit
Glycol absorption and regeneration route for project-specific gas dehydration.
Gas Sweetening / Desulfurization Unit
Acid-gas / sulfur-treatment scope where the feed and project specification require it.
Filter Separator
Feed-gas liquid/solids conditioning where required before downstream treatment.
Gas Dehydration & Mercury Removal Package
Combined treatment package for projects whose downstream process requires both functions.
Associated Gas / NGL Recovery Unit
A downstream gas-processing application that can define dehydration and treatment requirements.
Solution RFQ
Send the feed-gas and outlet requirement basis.
Share gas composition, flow and P/T range, water/moisture condition, H2S/CO2 or other contaminants if applicable, required outlet condition, downstream process, available utilities and project battery limits.
Detailed datasheets, drawings and project-specific technical documents are prepared after the operating conditions, scope of supply and commercial basis have been sufficiently clarified.