Post on 24-Dec-2015
• A pump used for circulating glycol within a dehydration system.
• A pump used to circulate amine within a desulphurizer system.
What is a Glycol Pump?
Features
• No auxiliary power required
• Eliminates need for level control and dump valve at absorber
• Low gas consumption
• Completely sealed system prevents glycol loss
• Only two moving assemblies
• Hydraulic “cushioned” check valves withremovable seats of hardened stainless steel
• Circulation Rates: SC Series 8 - 200 gph PV Series 3 - 450 gph
Inlet Scrubber
Wet Gas Inlet
Condensate Outlet
Contactor Tower
Glycol Cooler
Dry GasOutlet
High Pressure Filter
Reboiler
Surge Tank
Three Phase Gas, Glycol &Condensate Separator
Excess Separated Gas Outlet
Condensate Outlet
Natural Gas Dehydrator
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)
Natural Gas Dehydrator
Absorber(Contactor)
Heat exchangersurge tank
Reboiler
Pump
Wet glycol
Dry glycol
Wet glycol
Dry glycol
WetGas In
Dry Gas Out
Natural Gas Dehydrator
Absorber(Contactor)
Heat exchangersurge tank
Reboiler
Pump
Wet glycol
Dry glycol
Wet glycol
Dry glycol
WetGas In
Dry Gas Out
Wet gas enters the bottom of the absorber.
Natural Gas Dehydrator
Absorber(Contactor)
Heat exchangersurge tank
Reboiler
Pump
Wet glycol
Dry glycol
Wet glycol
Dry glycol
WetGas In
Dry glycol enters from the top of the Absorber Tower.
Natural Gas Dehydrator
Absorber(Contactor)
Heat exchangersurge tank
Reboiler
Pump
Wet glycol
Dry glycol
Wet glycol
Dry glycol
WetGas In
Dry Gas Out Dry gas exits from the top of the Absorber.
High pressure wet glycol goes to Glycol Pump.
DRY glycol falls through the bubble caps, as the WET gas travels up through the bubble caps.
Natural Gas Dehydrator
Absorber(Contactor)
Heat exchangersurge tank
Reboiler
Pump
Wet glycol
Dry glycol
Wet glycol
Dry glycol
WetGas In
Dry Gas Out
Low pressure WET glycol goes to the reboiler to be dehydrated.
Piston ready to move to the right
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)
Piston on its way to the right
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)
Piston ring contacts actuator
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)
Actuator moves ‘D’ slide to the right
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)
‘D’ slide shifts ports
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)
High pressure shifts pilot piston
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure)
Reversal of flow shifts check valves
Wet Glycol from Absorber (High Pressure)Wet Glycol to Reboiler (Low Pressure)Dry Glycol from Reboiler (Low Pressure)Dry Glycol to Absorber (High Pressure) Animation
Pump Trouble Shooting
• Loss of fluid circulationRunaway pumpHammering sound
Pump skips
• Pump runs until normal temp. is reached
• Erratic pump speed
• Pump stalls
• Leaking check valvesValve body sealDart seal
• Piston, piston rod seals
• Suction Lines too small
• Traps in wet glycol power piping send alternate slugs of glycol-then gas
• Plugged lines in dehy system• Swollen O-rings• Plugged passages in pump• Blocked check valve• Loose actuator
Pump Trouble Shooting
• Loss of fluid circulationRunaway pumpHammering sound
Pump skips
• Pump runs until normal temp. is reached
• Erratic pump speed
• Pump stalls
• Leaking check valvesValve body sealDart seal
• Piston, piston rod seals
• Suction Lines too small
• Traps in wet glycol power piping send alternate slugs of glycol-then gas
• Plugged lines in dehy stystem• Swollen O-rings• Plugged passages in pump• Blocked check valve• Loose actuator