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| Number | Title | Issue Date |
| 7261047 | Control of cyclone burner A method of operating a combustion process in a cyclone burner, after start-up thereof, is provided. A fuel and a combustion gas is fed into a combustion chamber of the cyclone burner. The velocity of the combustion gas is kept between a lower and an upper limiting ... | 08/28/2007 |
| 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 |
| 7104460 | Method and controller for determining carbon dioxide emissions from a recirculating air heater A method of determining the amount of air flowing through an outside air damper of a recirculating air heater includes the steps of sensing an amount of airflow flowing through the damper, recording the amount of airflow and a damper position value at a plurality of... | 09/12/2006 |
| 6866202 | Variable output heating and cooling control A heating or cooling system, such as an HVAC system, of variable output has a number of control elements and may include a variable speed compressor, a variable speed combustion (induced or forced draft) blower motor; a variable speed circulator blower motor; a vari... | 03/15/2005 |
| 6059194 | Method to control thermal processes The present invention relates to a method for controlling thermal processes, whereby measuring devices measure at least two process parameters at least once within a time interval in which a parameter change occurs that is not negligible for the process s... | 05/09/2000 |
| 5997278 | Apparatus for providing an air/fuel mixture to a fully premixed burner Apparatus provides an air/fuel mixture to a fully premixed burner and comprises means for providing fuel at a variable flow rate to the burner, means for supplying air at a variable flow rate to the fuel to form the mixture, means for sensing aeration of ... | 12/07/1999 |
| 5918803 | Power regulating system for the burner of a heater A power regulating system make it possible to switch on a plurality of power stages with different air flow rates and different fuel flow rates on the burner of the heater. In addition, noise level is optimized, since the blower that maintains the air flo... | 07/06/1999 |
| 5794549 | Combustion optimization system Information relating to combustion conditions within a fossil-fueled boiler that includes a plurality of burners adapted to produce flames combining to form a fireball is provided by acquiring data relating to the physical and temperature characteristics ... | 08/18/1998 |
| 5682826 | Systems and methods for controlling a draft inducer for a furnace Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a fan for inducing a draft in the furnace combustion chamber that causes a pressure drop across a heat exchanger assembly for moving exhaust combustion ... | 11/04/1997 |
| 5676069 | Systems and methods for controlling a draft inducer for a furnace Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a motor for driving a fan for inducing a draft in the furnace that causes a pressure drop across the heat exchanger of the furnace. A memory stores info... | 10/14/1997 |
| 5282457 | High efficiency gas furnace A high efficiency gas furnace utilizes a unique premix design in combination with a pressurized/high velocity combustion process. The combustion process occurs in a combustion chamber and the high temperature high velocity products of combustion follow a ... | 02/01/1994 |
| 5280756 | NOx Emissions advisor and automation system A method and system for controlling and providing guidance in reducing the level of NOx emissions based on controllable combustion parameters and model calculations while maintaining satisfactory plant performance and not causing other harmful ... | 01/25/1994 |
| 5261811 | Burner control system and method A burner control system for controlling loads such as a blower motor and an electronic pump of a burner which comprises a drive voltage regulating circuit for varying the drive voltages corresponding to the loads to thereby vary the amount of heat being g... | 11/16/1993 |
| 5122053 | Apparatus and method for the combustion of liquid or gaseous fuels With the constantly varying atmospheric conditions, in order nevertheless to achieve constantly a perfect, near stoichiometric combustion with extremely low power consumption and virtually without noise, one supplies solely the instantaneous quantity of a... | 06/16/1992 |
| 4998878 | Fuel control system for a burner A burner assembly includes a burner housing having a combustion chamber defined therein and a fuel injection nozzle secured to the burner housing and communicating with the combustion chamber. A fuel control device is provided for controlling the amount o... | 03/12/1991 |
| 4994959 | Fuel burner apparatus and a method of control An air-fuel ratio programmable control method for a fuel burner installation, and a fuel burner installation adapted to operate by the control method. In the method, an error (Ep) is determined by subtraction of an input (Po) representative of the existin... | 02/19/1991 |
| 4962749 | Method of operating a natural gas furnace with propane In a gas furnace designed for operation with natural gas, the use of propane as a fuel is facilitated by increasing the inducer speed by a factor which is obtained by comparing the higher inducer speed necessary to bring down the heat exchanger temperatur... | 10/16/1990 |
| 4798531 | Process and apparatus for the control of the air and fuel supply to a plurality of burners A plurality of burners, e.g., steam boiler burners, are provided with air and fuel through separate conduits. A separate air volume regulator is provided for each burner, but only a single fuel volume regulator is provided for all burners. After one burne... | 01/17/1989 |
| 4784580 | Airflow control system An airflow control system generates a compensating output which is combined with the normal damper control output in a damper operating device when a pole change motor driving a blower changes speed so that the damper is changed to compensate for the chan... | 11/15/1988 |
| 4770627 | Combustion control system for oil burner A combustion control system for an oil burner capable of precisely and positively carrying out adjustment of combustion to accomplish complete combustion during combustion operation when a variation in combustion has been carried out. The combustion contr... | 09/13/1988 |
| 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 |
| 4742783 | Incinerator combustion air control For continuous combustion air control in a hazardous waste incinerator, two signals are generated which totalize the air required on a fuel supplied basis. One signal is responsive to measured totalized fuel flow and this total can include fuel flow signa... | 05/10/1988 |
| 4737103 | Fresh air monitoring and controls relating thereto There is disclosed an environmental control system for a large volume structure (one horizontal dimension of at least 60 feet) having an air tempering unit including a horizontal cylindrical duct of about three feet diameter with an axial flow propeller f... | 04/12/1988 |
| 4708636 | Flow sensor furnace control Disclosed is a heating system having a combustion air blower, a fuel valve for providing fuel to a burner, and an exhaust stack for exhausting combustion products. Also disclosed is flow sensor apparatus operatively associated with the stack for providing... | 11/24/1987 |
| 4706881 | Self-correcting microprocessor control system and method for a furnace A self-correcting control system and method is provided for a furnace to correct certain operating conditions that exceed normal limits. Upon sensing insufficient air flow as a function of the pressure drop across the heat exchangers, the control system a... | 11/17/1987 |
| 4688547 | Method for providing variable output gas-fired furnace with a constant temperature rise and efficiency A furnace is operated such that the air-fuel ratio and the temperature rise are maintained constant so that the efficiency remains constant over the range of operation.... | 08/25/1987 |
| 4676734 | Means and method of optimizing efficiency of furnaces, boilers, combustion ovens and stoves, and the like A means and method for optimizing the efficiency of combustion devices such as furnaces, boilers, ovens, stoves, and the like which automatically tests for and controls the amount of input air utilized by the combustion device to optimize combustion effic... | 06/30/1987 |
| 4640678 | Dual-valve air-gas controller A dual-valve controller having a single rotary control element for concurrently adjusting both an air-control valve and a gas-control valve to supply an air/gas combustible mixture to a gas-fired burner. Applied to the inputs of the controller valves are ... | 02/03/1987 |
| 4635567 | Monitoring of burner operation Three burners are supplied with pulverized fuel entrained in air from a splitter and are brought to combustion under optimum conditions by adjustment of the secondary air flow to each. The rates of flow of primary and secondary air are determined and sign... | 01/13/1987 |
| 4631022 | Heat recuperator with compensator for pressure operated fuel regulator A temperature compensator for a pressure operated fuel regulator is used in combination with a heat recuperator to regulate fuel flow. In the recuperator, air to be used for combustion of the fuel is heated. Some of the heated air is supplied to the compe... | 12/23/1986 |
| 4585161 | Air fuel ratio control system for furnace An air fuel ratio control system comprises a first valve provided in a fuel pipe through which a fuel is supplied to a burner, a second valve provided in an air pipe through which air is supplied to the burner, a varying circuit for varying responsive to ... | 04/29/1986 |
| 4583936 | Frequency modulated burner system A furnace (A) defines a combustion chamber (10) in which a pair of burners (B) are mounted for oxidizing the fuel to heat the combustion chamber. An air blower (12) supplies air to the burners at a rate controlled by a rate control valve (18). A frequency... | 04/22/1986 |
| 4576570 | Automatic combustion control apparatus and method A method and apparatus for controlling the combustion of multiple fuels, especially fuels having diverse combustion air requirements. A heating rate demand signal indicative of the heating rate desired is generated and is compared with a fuel based fuel h... | 03/18/1986 |
| 4553924 | Jackshaft controlled boiler combustion control system An improved combustion control system for a jackshaft controlled boiler or the like utilizes a second power actuator, a linkage biasing mechanism and a function generator which provides a position control signal as a function of the boiler load in order t... | 11/19/1985 |
| 4551088 | Combustion control system The well-known "jackshaft" positioning or two-point parallel combustion control system has been modified to include a linkage strut length adjustor apparatus with a remote actuator apparatus. The adjustor apparatus includes an overload protection system t... | 11/05/1985 |
| 4547144 | Fuel gas control Disclosed is a fuel gas control for controlling the delivery of fuel gas. The present gas control comprises an inlet chamber having an inlet for receiving a supply of gas and an outlet chamber having an outlet for providing a supply of gas. The inlet and ... | 10/15/1985 |
| 4533315 | Integrated control system for induced draft combustion An integrated, closed loop system for controlling the fuel to air ratio in an induced draft combustion chamber which has a control pilot through which a draft is induced so that the fuel to air ratio in the control pilot chamber has a predetermined ratio ... | 08/06/1985 |
| 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 |
| 4517906 | Method and apparatus for controlling auxiliary fuel addition to a pyrolysis furnace A two-stage starved air furnace system is controlled to simultaneously achieve desired temperatures and percent stoichiometric air operation in the primary stage by modulating transformation relay functions acting upon measured temperature deviations to c... | 05/21/1985 |
| 4509913 | Device for controlling the air supply for a gas burner A burner having an air intake at atmospheric pressure, a gas (fuel) supply line and a combustion chamber in which gas from the latter line burns in the presence of atmospheric air drawn in from the intake, is provided with a swingable or rotatable flap-ty... | 04/09/1985 |
