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5474034 Supercritical steam pressurized circulating fluidized bed boiler
IX
PatentsALERT
5473884 COMBINED HEAT AND POWER APPARATUS Solihull, Sutton Jeffrey A; Greenhalgh Ala UNITED KINGDOM Assigned to British Gas plc PCT No. PCT/GB93/025 17 Sec. 37 1 Date Aug. 11, 1994 Sec. 102(e) Date Aug. 11, 1994 PCT Filed Dec. 9, 1993 PCT Pub. No. WO94/14000 PCT Pub. Date Jun. 23, 1994. A shell steam boiler comprises a furnace tube having an entrance which contains a gas burner and also receives the hot exhaust gases from a small gas turbine giving an output, on a power take off shaft from a power turbine, of 0.5 MW or less which drives an electrical power generator. Hot heating gases from the gas turbine and the burner pass down the furnace tube and then through a first group of pass tubes and then through a second group of pass tubes to an enclosure comprising a flue. A driven fan in the enclosure acts to draw the heating gases through the boiler and promotes a good flow of those gases.
5473898 METHOD AND APPARATUS FOR WARMING A STEAM TURBINE IN A COMBINED CYCLE POWER PLANT Briesch Michael S Orlando, FL, UNITED STATES Assigned to Westinghouse Electric Corporation A combined cycle gas turbine power plant uses compressed air bleed from the gas turbine compressor discharge air as a source of warming air for the steam turbine at start-up by incorporating a bypass line from the compressor discharge to the steam chest. During this time period, the steam produced by the heat recovery steam generator is dumped to the condenser. After warming the steam turbine, the compressed air is directed to the heat recovery steam generator for discharge to atmosphere. Once the heat recovery steam generator is capable of generating steam at
temperature sufficient and pressure for introduction into the steam turbine, a control valve in the bypass line is closed, thereby eliminating the warming air, and a control valve in the steam supply line from the heat recovery steam generator to the steam turbine is opened so that the steam turbine can be brought on line.
5474034 SUPERCRITICAL STEAM PRESSURIZED CIRCULATING FLUIDIZED BED BOILER Gounder Ponnusami K San Diego, CA, UNITED STATES Assigned to Pyropower Corporation A circulating fluidized bed boiler comprises a fluidized bed combustion chamber, a recirculating system for recirculating fluidized solids through the combustion chamber, and a plurality of tubes for withstanding supercritical pressure are disposed around the walls of the combustion chamber for circulating cooling fluid between an inlet header at the bottom of the chamber and an outlet chamber at the top of the combustion chamber. A water steam separator directs steam to a superheater and is bypassed during normal operation.
5474123 TUBE SHIELD Buckshaw Dennis UNITED STATES
J
Northville,
MI, 48167,
A tube shield for protecting the tubes of heat exchangers, such as boilers and condensers, from hostile elements. The tube shield includes an axially elongated arcuate protector member and a plurality of spring clips secured to the axial free edges of the protector member at spaced locations along the length of the protector member. The spring clips are sized and configured such that they splay outwardly as the protector member is pressed downwardly over an associated tube to pass the maximum diameter of the tube and
PatentsALERT
5473884 COMBINED HEAT AND POWER APPARATUS Solihull, Sutton Jeffrey A; Greenhalgh Ala UNITED KINGDOM Assigned to British Gas plc PCT No. PCT/GB93/025 17 Sec. 37 1 Date Aug. 11, 1994 Sec. 102(e) Date Aug. 11, 1994 PCT Filed Dec. 9, 1993 PCT Pub. No. WO94/14000 PCT Pub. Date Jun. 23, 1994. A shell steam boiler comprises a furnace tube having an entrance which contains a gas burner and also receives the hot exhaust gases from a small gas turbine giving an output, on a power take off shaft from a power turbine, of 0.5 MW or less which drives an electrical power generator. Hot heating gases from the gas turbine and the burner pass down the furnace tube and then through a first group of pass tubes and then through a second group of pass tubes to an enclosure comprising a flue. A driven fan in the enclosure acts to draw the heating gases through the boiler and promotes a good flow of those gases.
5473898 METHOD AND APPARATUS FOR WARMING A STEAM TURBINE IN A COMBINED CYCLE POWER PLANT Briesch Michael S Orlando, FL, UNITED STATES Assigned to Westinghouse Electric Corporation A combined cycle gas turbine power plant uses compressed air bleed from the gas turbine compressor discharge air as a source of warming air for the steam turbine at start-up by incorporating a bypass line from the compressor discharge to the steam chest. During this time period, the steam produced by the heat recovery steam generator is dumped to the condenser. After warming the steam turbine, the compressed air is directed to the heat recovery steam generator for discharge to atmosphere. Once the heat recovery steam generator is capable of generating steam at
temperature sufficient and pressure for introduction into the steam turbine, a control valve in the bypass line is closed, thereby eliminating the warming air, and a control valve in the steam supply line from the heat recovery steam generator to the steam turbine is opened so that the steam turbine can be brought on line.
5474034 SUPERCRITICAL STEAM PRESSURIZED CIRCULATING FLUIDIZED BED BOILER Gounder Ponnusami K San Diego, CA, UNITED STATES Assigned to Pyropower Corporation A circulating fluidized bed boiler comprises a fluidized bed combustion chamber, a recirculating system for recirculating fluidized solids through the combustion chamber, and a plurality of tubes for withstanding supercritical pressure are disposed around the walls of the combustion chamber for circulating cooling fluid between an inlet header at the bottom of the chamber and an outlet chamber at the top of the combustion chamber. A water steam separator directs steam to a superheater and is bypassed during normal operation.
5474123 TUBE SHIELD Buckshaw Dennis UNITED STATES
J
Northville,
MI, 48167,
A tube shield for protecting the tubes of heat exchangers, such as boilers and condensers, from hostile elements. The tube shield includes an axially elongated arcuate protector member and a plurality of spring clips secured to the axial free edges of the protector member at spaced locations along the length of the protector member. The spring clips are sized and configured such that they splay outwardly as the protector member is pressed downwardly over an associated tube to pass the maximum diameter of the tube and