Glycol Dehydration

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Often, a glycol dehydrator is necessary for removal of tiny water droplets from natural gas if the water was not completely extracted with the separator. The process involves “dehydrating” the natural gas and usually calls for one of two processes: absorption or adsorption. The 1500 series switches fall into the absorption process.

Glycol dehydration involves putting glycol in contact with a stream of natural gas that contains water. The glycol absorbs the water from the wet gas stream, becomes heavier and sinks to the bottom of the contactor where it is expelled. The natural gas is then easily routed out of the dehydrator and the glycol/water solution is sent to a special boiler that steams away the water allowing the glycol to be recycled.

A SOR 1500 Series mechanical level switch is installed on the inlet scrubber/contactor/absorber to monitor glycol/water levels. When mounted below the wet gas inlet, it prevents the glycol/water level from rising above it. If the level reaches the switch, a signal is sent to a solenoid that works in conjunction with a dump valve which drains the liquid from the scrubber/contactor/absorber.