Elwyn J Shimoda

44650000, Aug 14, 1984

Jan 3, 1984

6/567600

Elwyn Shimoda - Ponca City OK

Conoco Inc. - Ponca City OK

F23D 100
F23G 700

110343

A method of increasing the efficiency of a cyclone-fired boiler which uses high sodium lignite as fuel. The fuel produces ash deposits on heat transfer surfaces within the boilers, and in accordance with the method, powdered limestone is periodically injected into the firebox of the boiler in a quantity and for a time period such that the limestone is heated to a temperature in the range of from about 2200. degree. F. to about 2700. degree. F. and reacts with ash deposits in the boiler to form layers thereon. The layers so formed have a higher ash fusion temperature than the unreacted deposits and cause the resulting composite deposit to be more friable whereby the deposit can be removed using conventional soot blower apparatus.

49004450, Feb 13, 1990

Feb 22, 1989

7/314609

David A. Flanigan - Cleveland OK
Elwyn Shimoda - Ponca City OK
James E. Stolhand - Ponca City OK

Conoco Inc. - Ponca City OK

B01D 4512

2105121

A system is provided for the separation of oil from oily water, particularly where the oily water is available only at relatively low pressures insufficient ot drive a hydrocyclone separator. Particular combinations of pumps and hydrocyclones can be effective in these low pressure situations where the pressure boost required is not substantially greater than a differential pressure at which the pump begins to substantially degrade the volumetric mean size of droplets of oil in the oily water passing therethrough. This is achieved by operating the pump at relatively near its maximum flow rate capacity to substantially reduce on a percentage basis the effect of fluid slippage within the pump. Improved techniques for analysis of oil droplet size distribution are also disclosed.

48448176, Jul 4, 1989

Jun 29, 1988

7/213196

David A. Flanigan - Ponca City OK
Elwyn Shimoda - Ponca City OK
James E. Stolhand - Ponca City OK

Conoco Inc. - Ponca City OK

B01D 17038

210788

A system is provided for the separation of oil from oily water, particularly where the oily water is available only at relatively low pressures insufficient to drive a hydrocyclone separator. Particular combinations of pumps and hydrocyclones can be effective in these low pressure situations where the pressure boost required is not substantially greater than a differential pressure at which the pump begins to substantially degrade the volumetric mean size of droplets of oil in the oily water passing therethrough. This is achieved by operating the pump at relatively near its maximum flow rate capacity to substantially reduce on a percentage basis the effect of fluid slippage within the pump. Improved techniques for analysis of oil droplet size distribution are also disclosed.