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| Number | Title | Issue Date |
| 7275533 | Pressure controller for a mechanical draft system Systems and method for controlling the flow of air through a mechanical draft system are disclosed herein. A pressure controller for controlling air pressure comprises an appliance controller configured to control the operation of a plurality of appliances, an intak... | 10/02/2007 |
| 7161678 | Systems and methods for determining the existence of a visible plume from the chimney of a facility burning carbon-based fuels Excess oxygen in the combustion process of a facility that bums carbon-based fuels may cause a visible plume in the atmosphere at the stack of the facility. Traditional optical based opacity monitors may be unable to detect this plume or the plume may form at a loca... | 01/09/2007 |
| 7089745 | System for vaporization of liquid fuels for combustion and method of use A gas stream with a reduced oxygen concentration relative to ambient air is used to vaporize a liquid fuel or liquified higher hydrocarbon gas, or is mixed with a vaporized gas, and the reduced oxygen vaporized fuel gas is fed to a combustion device such as a premix... | 08/15/2006 |
| 7036982 | Method and apparatus to control an exhaust gas sensor to a predetermined termperature The invention provides a control strategy and a control system to control a gas sensor to a target operating temperature. It relies upon both feedback and model-based feedforward control systems to achieve and then maintain the sensor at the target operating tempera... | 05/02/2006 |
| 6948926 | Reduced-emissions combustion utilizing multiple-component metallic combustion catalyst Residual fuels, as well as lighter distillate fuels, are combusted with greater efficiency by utilizing low concentrations of specific bimetallic or trimetallic fuel-borne catalysts. The catalysts reduce fouling of heat transfer surfaces by unburned carbon while lim... | 09/27/2005 |
| 6039261 | Process for improving the combustion of a blow-type burner A method and apparatus for achieving optimal combustion. A boiler has a blower-type burner operatively associated therewith wherein the burner has a variable speed blower. Combustive air is provided to the burner, and in accordance with the invention, a g... | 03/21/2000 |
| 5279263 | Cascaded steam temperature control applied to a universal pressure boiler The firing rate and the feedwater flow rate of a universal pressure boiler are controlled using a cascaded steam temperature control system. The secondary superheater outlet temperature comprises an outer loop for the control system, while the convection ... | 01/18/1994 |
| 5261337 | Combustion control method of refuse incinerator The present invention aims for the object thereof at preventing unburnt gas and noxious gas components from being generated in a refuse incinerator, and provides a combustion control method by which it is arranged so that a feeder (2) and a stoker (3) are... | 11/16/1993 |
| 5230293 | Method and apparatus for controlling a refuse incineration plant A multi-loop control system and a method for using the control system to even out the generation of heat produced by a refuse incineration plant. The quantity of steam generated is controlled as a primary controlled variable and the oxygen content of the ... | 07/27/1993 |
| 5199385 | Through the wall vented water heater The present invention provides a water heater capable of exhausting flue gases from an interior space of a building to an exterior space and is adapted for installation through an upstanding wall. The water heater has an insulated tank with a water inlet ... | 04/06/1993 |
| 5161488 | System for purifying contaminated air A steam boiler (2) including a fire tube (21) and convection heating surfaces (22) is preceded by a combustion chamber (30) including a surface burner (34) for high excess air. The combustion chamber (30) and the fire tube (21) are internally thermally in... | 11/10/1992 |
| 5052310 | Solid waste-to-steam incinerator capacity enhancement by combined oxygen enrichment and liquid quench A process is disclosed for controlling the combustion and temperature in an solid waste-to-steam incineration system comprising a grated combustion zone and a steam boiler. This control is achieved by a synergistic combination of oxygen enrichment of an a... | 10/01/1991 |
| 5044326 | Flammable waste liquid combustion system and method Apparatus is provided for controlling the burning of a volatile waste liquid together with a conventional fuel in a boiler in the form of a free-standing module which contains a flow-control valve for the waste liquid. This system includes a means for mon... | 09/03/1991 |
| 5027751 | Method and apparatus for optimized boiler operation Boiler operations are fine tuned to minimize thermodynamic losses and pressure losses across throttle valves at the output of a boiler. Whenever the boiler is operating outside of desired operating levels, the first action considered is to reduce spray fl... | 07/02/1991 |
| 4984524 | Technique for controlling the combustion of fuel having fluctuating thermal values The combustion of fuel having a highly fluctuating thermal value is controlled to permit optimization of air supply and reduction of waste gas impurities. The fuel passes through a combustion chamber having a degassing and evaporation zone, a primary comb... | 01/15/1991 |
| 4922861 | Multiple-purpose instantaneous gas water heater A multiple purpose instantaneous gas water heater comprises a combination of a larger combustion capacity type first burner with a smaller combustion capacity type second burner. Each of the burners can be controlled by a proportional combustion control m... | 05/08/1990 |
| 4901678 | Heating boiler and method for operating same A fan forces air through an air inlet channel to a mixing chamber where it is mixed with fuel, and the mixture is then fed to a burner. The combustion products of the burner provide heat to a heat exchanger which is connected to a discharge channel. The c... | 02/20/1990 |
| 4895082 | Technique for controlling the combustion of fuel having fluctuating thermal values The combustion of fuel having a highly fluctuating thermal value is controlled to permit optimization of air supply and reduction of waste gas impurities. The fuel passes through a combustion chamber having a degassing and evaporation zone, a primary comb... | 01/23/1990 |
| 4838183 | Apparatus and method for incinerating heterogeneous materials An apparatus for burning waste refuse having a heterogeneous composition comprising means defining a combustion chamber having an inlet for charging waste refuse therein and an outlet for discharging combustion gases therefrom, means disposed within the c... | 06/13/1989 |
| 4819587 | Multiple-purpose instantaneous gas water heater A multiple purpose instantaneous gas water heater comprises a combination of a larger combustion capacity type first burner with a smaller combustion capacity type second burner. Each of the burners can be controlled by a proportional combustion control m... | 04/11/1989 |
| 4805114 | Economical dispatching arrangement for a boiler system having a cogenerative capability An economical despatching arrangement for despatching load and fuel assignments on a multi-boiler cogenerative type steam generating plant includes a logic arrangement of determining a present value of flow of each fuel to each boiler, a logic arrangement... | 02/14/1989 |
| 4802446 | Safety device for subcritical pressure steam boilers A safety device for subcritical natural and forced circulation boilers wherein the differential between downcomer fluid temperature and drum saturation temperature is measured and the trend of the differential is determined by computer means on a continuo... | 02/07/1989 |
| 4791889 | Steam temperature control using a modified Smith Predictor A system for controlling steam temperature in a boiler using a time delay feedback controller known as a Smith Predictor to provide control tuning of true boiler parameters which change with load.... | 12/20/1988 |
| 4779795 | Convector room heater incorporating a hot water boiler According to the present invention there is provided a boiler comprising a firebox, a control device controlling the flow of air into the firebox, a water jacket surrounding at least part of the firebox, a sensor to sense the temperature of the water in o... | 10/25/1988 |
| 4770340 | Boiler air flow controlling apparatus A boiler air flow controlling apparatus for feeding air in a desired air flow to a boiler by cooperation of a first fan for feeding air to the boiler with a second fan for sucking air from said boiler. The apparatus includes means for varying, when the nu... | 09/13/1988 |
| 4768469 | Operation control apparatus for recovery boilers An apparatus for controlling operation of a recovery boiler for compensating a predetermined reference temperature of black liquor by a compensation value in accordance with a type of an injecting gun provided in the boiler, a compensation value set by th... | 09/06/1988 |
| 4749122 | Combustion control system In a combustion system, the economic optimum efficiency is achieved by periodically computing a relative index of combustion efficiency using the combustion chamber as a real-time, on-line calorimeter. This is accomplished by first determining the combust... | 06/07/1988 |
| 4724775 | Method and apparatus for controlling the rate of heat release The subject invention relates to an improved method and apparatus to control the rate of heat release (ROHR) from a reaction zone confined within a chamber, air and fuel having been introduced into said reaction zone to achieve combustion, plural sensors ... | 02/16/1988 |
| 4716858 | Automatic firing rate control mode means for a boiler An automatic firing rate control mode arrangement is provided as a method of operation within a flame safeguard sequencer. The system uses proportional control squared, an integration which reflects the past load history to determine the present load, and... | 01/05/1988 |
| 4697530 | Underfed stoker boiler for burning bituminous coal and other solid fuel particles An automatic stoker boiler has a heat transfer compartment above a combustion chamber which is divided by a horizontal partition inclined upwardly from the rear end of the boiler towards but terminating short of the front end thereof to provide a restrict... | 10/06/1987 |
| 4637348 | Apparatus for controlling starting operation of boiler An apparatus for controlling a starting operation of a boiler which comprises a super heater, a super heater bypass valve, a turbine bypass valve and a fuel flow rate regulating valve. A temperature detector detects a temperature of the steam at a predete... | 01/20/1987 |
| 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 |
| 4598648 | Fire failure safety control for stokers A control circuit for a stoker-fed heating system is effective, whenever the primary sensing control (thermostat or aquastat) of the system calls for heat, to determine whether there is sufficient fire in the furnace to assure maintained combustion, and i... | 07/08/1986 |
| 4582026 | Feed-forward type automatic control system Disclosed is an automatic anticipatory control system for controlling, by one common control quantity, a plurality of points of operation that can be changed over individually and arbitrarily between start and stop operations and between an automatic oper... | 04/15/1986 |
| 4574746 | Process heater control A method for controlling a process heater in which a required heat demand is computed based on the enthalpy of the feed stock and the desired enthalpy of the final product, and then used as a feedforward portion of the fuel control. A second embodiment of... | 03/11/1986 |
| 4564141 | Apparatus and method for domestic hot water control A domestic hot water heating system which disables the normal aquastat during set-back periods where the temperature of the water source is sensed at the output manifold and the temperature of the water also is sensed a predetermined distance along the ma... | 01/14/1986 |
| 4519540 | Sealed gas heater with forced draft and regulation by microprocessor The invention concerns a control device for gas boilers. The overall functions involving control and safety are ensured by a control box (26) with microprocessor which centralizes data collected from the ambient thermostat (27), the temperature sensor (28... | 05/28/1985 |
| 4499857 | Fluidized bed fuel burning Controlling a fluidized bed coal combustor by sensing certain variables and thereby controlling other variables.... | 02/19/1985 |
| 4498428 | Combustion control for a boiler A desired ratio of offgas to fuel gas is maintained for a fuel mixture supplied to the burners associated with a boiler by venting steam as required to insure than all offgas may be combusted while maintained the desired offgas to fuel gas ratio. The vent... | 02/12/1985 |
| 4497283 | Boiler control The control of the actual liquid level in a boiler is accomplished by using the flow rate of the fuel to the combustion system associated with the boiler to generate a signal which is utilized to bias a control signal generated in response to steam flow r... | 02/05/1985 |
