A heating chamber is provided for receiving well effluent therein including oil, water and gas and a heated chamber is also provided for containing a heat exchange liquid to be heated. Liquid heat exchange coils are disposed in the chambers and are serially connected in a closed loop flow path with gas pressure operated pump structure operatively associated with the closed loop flow path for pumping liquid therethrough. Gas fired heating structure is operatively associated with the heated chamber for heating liquid therein and a gas outlet from the heating chamber comprises a source of well gas under pressure directed through supply structure supplying well gas to the pump and burner structures. The supply structure includes a gas flow line, in which the pump structure is serially disposed, extending from the gas source to the pump structure and thereafter to the burner structure. The gas flow line includes a thermostatically controlled flow valve therein for opening and closing the flow line responsive to predetermined low and high temperatures in the heating chamber and a gas pressure operated control valve is connected in the gas flow line between the burner and the pump under the control of a self venting thermostat responsive to the temperature of the heated chamber and disposed in a gas supply line communicated with the gas outlet at its inlet end and with the gas pressure operated control valve at its outlet end.
A heating chamber is provided for receiving well effluent therein including oil, water and gas and a heated chamber is also provided for containing glycol to be heated. Heat exchange coils are disposed in the chambers and are serially connected in a loop flow path with gas pressure operated pump structure operatively associated with the flow path for pumping glycol therethrough. Gas-fired heating structure is operatively associated with the heated chamber for heating glycol therein and a gas outlet from the heating chamber comprises a source of well gas under pressure through supply structure supplying well gas to the pump and burner structures. The supply structure includes a glycol-gas contactor for drying the gas provided from the supply structure to the pump. Glycol is supplied from the heated chamber to the glycol-gas contactor and the wet glycol discharged from the contactor is returned to the heated chamber through a heat exchange structure disposed within a storage tank communicated with the heated chamber for receiving glycol therefrom as glycol is drawn from the storage tank, and therefore the gas used to effect the glycol circulation in the two circulation loops is captured, stored and used as burner fuel and to operate other controls.
Direct Fired Glycol Regenerator With Vertical Flues
A liquid desiccant regenerator is provided including an upstanding hollow reboiler having upstanding peripheral sides, a bottom and a top. A plurality of laterally space upstanding tubular flues are provided in the reboiler and open upwardly and downwardly through the top and bottom. A flue plenum chamber is disposed over the top into which the upper ends of the tubular flues open and a flue pipe opens upwardly from the plenum chamber. A combustion chamber is disposed below the bottom including low pressure gas burner structure therein and into which the lower ends of the flues open. An upper portion of the reboiler includes a lateral extension and a still column is supported from the lateral extension and is positioned relative thereto for regenerated liquid desiccant drainage from the lower end of the column into the lateral extension. The reboiler is designed to be operated with a predetermined liquid desiccant level above and below the upper and lower extremities of the lateral extension and the reboiler includes a scum baffle protected liquid desiccant outlet disposed substantially at the aforementioned level and extends above and below the latter.
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