Air reduction control for oil-treating vessels
A heater apparatus is described comprising: a vessel; a burner for heating a material contained in the vessel; air intake passage means for directing air to the burner; a flame arrester operatively associated with the air intake passage means for preventing flames from the burner from extending past the flame arrester; and an air damper means for controlling a flow rate of intake air drawn through the flame arrester. The air damper means include: a. a fixed circular first plate having first circumferentially spaced plate openings disposed therethrough; b. a rotatable circular second plate coaxially mounted relative to the first plate, and having second circumferentially spaced plate openings disposed therethrough. The second plate is rotatable relative to the first plate between an open first position wherein the second plate openings is in registry with the first plate openings, and a second fully closed position wherein the first plate openings is substantially completely blocked by the second plate; and c. gasket means between the first and second plates for (i) sealing between the first and second plates substantially preventing any air flow through the first plate openings when the second plate is in its fully closed position, and (ii) creating a frictional force which must be overcome to rotate the second plate relative to the first plate.
- Assignee:
- Conoco, Inc., Ponca City, OK
- Patent Number(s):
- US 4702692
- OSTI ID:
- 5751532
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fuel control device, fuel control system using the device and method of making the device
Automatic damper assembly