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| Number | Title | Issue Date |
| 7314104 | Steam driven road vehicle A steam driven road vehicle having a firebox, a boiler, a drive mechanism operated by steam from the boiler, a water supply supplying water to the boiler, and a drive connection connected between the drive mechanism and an axle of the vehicle. A fuel bin is supporte... | 01/01/2008 |
| 7278378 | Regenerative air preheater leakage recovery system A regenerative air preheater leakage recovery system comprising a coal-fired steam generator in fluid communication with a regenerative air preheater. The regenerative air preheater adapted to provide a heat exchange between a flow of cool air and of hot flue gas to... | 10/09/2007 |
| 7204966 | Method and apparatus for improved fired heaters A fired heater is adapted for increasing the output of a plant where the furnace capacity is considerably improved without corresponding increase in the pressure drop. The described technique utilizes a parallel thermal path in contrast to the conventional series th... | 04/17/2007 |
| 7150290 | Unitary concrete pumping station for aqueous waste submersible pumping applications A unitary concrete structure pumping station useful in pumping waste fluids and the like during the passing of such materials from one part of a gravity flow waste system to another. This concrete structure is simple to install and use and many of the problems assoc... | 12/19/2006 |
| 7097210 | Method and apparatus for providing a transition connector to introduce outside air and vent flue for boiler combustion A method and apparatus for sealing a combustion intake for a boiler from inside air is provided. A method and apparatus for providing a transition piece for venting fresh air to and combusted gas away from a boiler is also provided. A method of connecting a transiti... | 08/29/2006 |
| 7095000 | Radio-frequency driven dielectric heaters for non-nuclear testing in nuclear core development Apparatus and methods are provided through which a radio-frequency dielectric heater has a cylindrical form factor, a variable thermal energy deposition through variations in geometry and composition of a dielectric, and/or has a thermally isolated power input. ... | 08/22/2006 |
| 7082987 | Rotary regenerative heat exchanger and rotor therefor A rotary regenerative heat exchanger includes a rotor having primary vanes 14 extending between the hub and the periphery of the rotor, and additional secondary vanes 15 between said primary vanes and extending over an outer annulus of the rotor. Such ... | 08/01/2006 |
| 6974318 | Online bakeout of regenerative oxidizers A method of burning off accumulated contaminants from heat sink media of a regenerative oxidizer having a plurality of segments containing media arranged around a central axis and a rotary valve which includes repeatedly rotating the rotary valve 180 degrees to alte... | 12/13/2005 |
| 6948454 | Airflow apparatus An apparatus for heating a medium includes a combustion chamber; a burner within the combustion chamber and operable to create products of combustion for heating the medium to be heated; a conduit for the exhaust of the products of combustion; and an airflow apparat... | 09/27/2005 |
| 6702570 | Firing method for a heat consuming device utilizing oxy-fuel combustion A method of firing a heat consuming device such as a boiler or furnace in which an oxygen transport membrane is integrated with the device such that part of the permeated oxygen supports an initial combustion to heat the incoming air to the oxygen transpo... | 03/09/2004 |
| 6647929 | System for increasing efficiency of steam generator system having a regenerative air preheater A method for increasing the efficiency of a steam generator system including a boiler and a regenerative air preheater. The method including determining a reduced rate of acid accumulation in the preheater which may be achieved by injecting an SO3 | 11/18/2003 |
| 6640752 | Boiler and regenerative air preheater arrangement to enhance SO3 capture An air preheater for use with a boiler which discharges a flow of flue gas containing SO3 comprises a housing having oppositely disposed hot and cold ends. The hot end includes an air outlet duct, having a combustion air duct and an excess air ... | 11/04/2003 |
| 6439170 | Single seam duct corner A transition element for providing an interface between a duct having a substantially rectangular cross section and an air preheater having a substantially circular cross section. The transition element includes an inner sidewall, an outer sidewall, and f... | 08/27/2002 |
| 6397785 | Rotor design with double seals for horizontal air preheaters A method for adding additional axial seals and radial seals within existing air preheaters. The installed heat transfer baskets, radial seals, axial seals, gratings, and stay plates are all removed from the air preheater. An intermediate diaphragm plate i... | 06/04/2002 |
| 6382958 | Air separation method and system for producing oxygen to support combustion in a heat consuming device A method and system to separate oxygen from air for producing oxygen to support combustion of a fuel, thereby to produce heat in a heat consuming device. In accordance with the method and system a heated and compressed air stream is introduced into a cera... | 05/07/2002 |
| 6253714 | Steam generator A steam generator with a stack of coal-dust burners (4), each of which accommodates a removable oil lance, and with one or more flues (3) that communicate with a combustion-air heater (6). The heater rests on a scaffolding (12) and has flue gas flowing th... | 07/03/2001 |
| 6227150 | Load based control system for active leakage control in air preheater A rotary air preheater has a rotor, at least one seal disposed proximate to the rotor, a drive for reciprocally driving a portion of the seal between a first position adjacent the rotor and a second position spaced from the first position, and a control s... | 05/08/2001 |
| 6155209 | Air preheater sector plate design with centered sealing arrangements A sector plate static sealing arrangement for a rotary regenerative air preheater employs a single rib attached to and extending along the center line of the sector plate toward the air preheater casing. The rib cooperates with a static seal attached to t... | 12/05/2000 |
| 6145582 | Heat accumulator block for regenerated heat exchanger A heat accumulator block for regenerative heat exchangers has a heat exchanger of a plurality of heat exchanger plates arranged substantially parallel to one another for formation of flow channels. A dirt collector is arranged upstream of a side of the he... | 11/14/2000 |
| 5915340 | Variable sector plate quad sector air preheater A sealing arrangement for a quad sector rotary regenerative air preheater has a rotor rotatably mounted in a housing. The rotor has radially extending diaphragms forming compartments and radial seals extending along the edges of the diaphragms. Sector pla... | 06/29/1999 |
| 5915339 | Sector plate and seal arrangement for trisector air preheater A trisector air preheater includes sector plates between the primary air sector and the flue gas sector and between the secondary air sector and the flue gas sector which are of a large size so as to provide double radial seals. However, the sector plate ... | 06/29/1999 |
| 5878699 | Process furnace A twin-cell furnace for process stream preheat and utility steam superheat. The furnace uses a pair of vertical radiant cells with top supported, bottom guided, single row, multiple pass vertical coils fired on opposite sides by floor-mounted burners. An ... | 03/09/1999 |
| 5730070 | Apparatus for introducing gas recirculation to control steam temperature in steam generation systems An apparatus for introducing gas recirculation into a furnace to control steam temperature includes a hot air chamber for receiving hot air from an air preheater. The hot air chamber has at least one outlet communicating with the interior of the furnace. ... | 03/24/1998 |
| 5687674 | Steam power plant for generating electric power A steam power plant for generating electric power has a fossil-fuelled boiler, a water-steam cycle for generating high-tension, superheated steam for a steam turbine, an economizer to transmit heat from flue gas to the feed-water, an air preheater to tran... | 11/18/1997 |
| 5320070 | Method and device for using excess heat not required for operating a desulfurization device A method and a device for using excess heat of flue gas that is not required for operating a flue gas desulfurization device of a power plant is presented. Before being introduced into the flue gas desulfurization device. The flue gas is guided through pr... | 06/14/1994 |
| 5293841 | Arrangement for utilizing the heat contained in the exhaust gas of a coal-fired boiler An arrangement for utilizing the heat contained in the exhaust gas from a coal-fired boiler for preheating feed water for the boiler and for preheating primary air. The arrangement includes a rotating heat transfer unit and lines for conducting exhaust ga... | 03/15/1994 |
| 5016577 | Heat exchanger A heat exchanger assembly for a paint baking booth includes a horizontal cylindrical fire box with a vertical cylindrical hot gas riser chamber atop the fire box. A tube mounting plate across and sealed to the the top of the riser chamber extends outwardl... | 05/21/1991 |
| 4909190 | Boilers A gas fired boiler for a domestic hot water and/or central heating system has a burner (25) (FIG. 1), a static heat exchanger (22) through which water is circulated, and a rotary heat exchanger (12) of which the body is a disc of ceramic material such as ... | 03/20/1990 |
| 4890581 | Method and plant for purifying the exhaust air from a tenterframe or a singer The exhaust air from the tenterframe (1) conveyed by a fan (7) is fed as combustion air to the burner (13) of a steam boiler (21). The burner (13) is operated with a variable and high excess of air of λ=1,5 to λ=3,5. The boiler output is regulated by th... | 01/02/1990 |
| 4712515 | Device for evacuating into the ambient air combustion products from a condensation boiler A device for evacuating into the ambient air combustion products from a condensation boiler, in which at least one downstream section of the conduit for evacuating the combustion products is coaxial to the conduit for admission of the combustion air neces... | 12/15/1987 |
| 4694783 | Multiple boiler heating system with improved venting and heat reclamation Disclosed is a heating system of the multiple condensing boiler type wherein hot exhaust gases are in heat exchange relation with the condensate in a manifold common to the boilers. The exhaust gas conduits from the boilers open into the manifold at a lev... | 09/22/1987 |
| 4664067 | Exhaust gas heat recovery boiler An exhaust gas boiler including a plurality of superheaters and reheaters disposed separately in a side-by-side relationship with each other in the upstream of exhaust gas flow and in a plane across the complete of said exhaust gas boiler, which comprises... | 05/12/1987 |
| 4642049 | Process for preheating a combustive gas by means of combustion gases and preheating device associated with a burner for carrying out the said process The present invention relates to a process and a device for preheating by combustion gases, a combustive gas intended to be mixed with a combustible gas before its combustion, comprising a box member containing a first, upper vertical exchanger in which t... | 02/10/1987 |
| 4640232 | Device for evacuating into the ambient air combustion products from a condensation boiler A device for evacuating into the ambient air combustion products from a condensation boiler, in which at least one downstream section of the conduit for evacuating the combustion products is coaxial to the conduit for admission of the combustion air neces... | 02/03/1987 |
| 4632064 | Boiler A boiler having a discharge gas duct divided into a plurality of passages, respective passages having reheaters and superheaters therein. Gas flow controllers are provided for adjusting combustion gas flow through the respective passages. Evaporators are ... | 12/30/1986 |
| 4628869 | Variable temperature waste heat recovery system A system for recovering the waste heat normally exhausted in the atmosphere by blast furnace stoves or other variable temperature process heaters. The system comprises a heat exchange apparatus located in the exhaust stack, heat transfer means for carryin... | 12/16/1986 |
| 4592293 | Method of controlling an air heater of a coal-fired boiler A method of controlling an air heater of a coal-fired boiler system comprising an air heater for heating a primary air used to dry a pulverized coal and convey it into the boiler and a secondary air to combust the pulverized coal by a heat exchange utiliz... | 06/03/1986 |
| 4580530 | Method in the operation of a firing plant, and a firing plant for performing the method In a method in the operation of a firing plant of the type comprising a combustion furnace and heat exchanger means to transfer thermal energy from the flue gas of the furnace to its combustion air, wherein a vaporizable liquid, such as water, is added to... | 04/08/1986 |
| 4506608 | Unfired drying and sorting apparatus for preparation of solid fuel and other solid material The invention comprising a drying and sorting apparatus for preparation of solid fuel and other solid materials having substantial surface moisture. Ambient air/gas is preheated by indirect heat exchange or other unfired means sufficiently to provide heat... | 03/26/1985 |
| 4452180 | Indirect counterflow heat recovery system of the regenerative type for steam generators, gas turbines, and furnaces and engines in general A heat regenerator indirectly utilizes the hot gases exhausted by a furnace or engine to heat the air supply to it, through the use of heat transfer fluids which function as an efficient heat transfer medium to implementation of the counterflow and direct... | 06/05/1984 |
