52results about "Combustion fuels" patented technology

Apparatus for controlling the operation of a biomass stove utilizes three proportional integral derivative (PID) controllers as part of a closed loop to control the fuel feed rate, the convection fan speed and the combustion fan speed. The first loop controls room temperature, the second loop controls the convection fan speed and the third loop controls the combustion fan. Appropriate temperature readings are utilized for the first and second loop. The third loop, which utilized feedback of the ratio between the heat exchanger temperature to the exhaust temperature, in addition to measuring these temperatures also references a library of look-up tables of such ratios over the entire heat range of the stove that have been correlated to combustion efficiency, as an input. This enables the operator to optimize the heat output for any operating point.

Techniques for monitoring operation of a flame ignitor are provided. In one embodiment, multiple inputs are received. The inputs are received from at least one of a first group of inputs and a second group of inputs. The first group includes a flame rod voltage, a stop signal for deactivation of the flame ignitor, a fuel supply interruption signal, and an air supply interruption signal. The second group includes a start signal for activation of the flame ignitor, and a flame proven signal indicating presence of a flame produced by the flame ignitor. If inputs from the first group are received, a cause of a failure of the flame ignitor is determined. If inputs from the second group are received, a reliability of the flame ignitor is determined.

According to embodiments of the present invention, a pellet stove includes a firepot assembly with a bottom plate slideable along rails to move between a closed position during combustion in the firepot and an open position during ash removal. According to other embodiments, a firebox or combustion enclosure includes a plurality of airfoils formed on the inner and outer surfaces of the enclosure to facilitate heat exchange between exhaust gases flowing across the inner surface of the enclosure and air blown across the outer surface of the enclosure. According to some embodiments, the airfoils and enclosure are of integral unibody construction. According to yet other embodiments, a user sets parameters via a wall control unit, and a stove control unit receives the parameters and automatically controls fuel feed rate, ignition, convection blower, combustion blower, and / or firepot cleaning based on the one or more parameters.

A method is provided for performing a transfer from gas fuel operation to liquid fuel operation in a gas turbine with a dual fuel system. The method includes initiating a predetermined uncontrolled liquid fuel prefill flow rate through the liquid fuel system, sensing an onset of the uncontrolled liquid fuel flow to the combustor nozzles, and initiating transfer from gas fuel operation to liquid fuel operation when the flow of uncontrolled liquid fuel at the combustor nozzles is sensed. The onset of uncontrolled liquid fuel flow to the combustor nozzles is determined by monitoring changes of Fuel Normalized Power (FNP), a parameter sensitive to uncontrolled liquid fuel flow, and determining when FNP exceeds a threshold algorithm value.

A method of combustion for pulverized hydrocarbonaceous fuel includes the steps of injecting an air / fuel stream into a burner, causing a low-pressure zone; directing a flow of a high-temperature combustion gas from a combustion chamber into the low-pressure zone in the burner; mixing the high-temperature combustion gas with the injected air / fuel stream to heat the injected air / fuel stream, and injecting the heated air / fuel stream from the burner to the combustion chamber, wherein the air / fuel stream is rapidly devolatilized and combusted in a flame that has a high temperature; sensing a combustion parameter; and based on the sensed combustion parameter, controlling combustion to achieve at least one of a desired NOx reduction and a desired distance from the burner to a flame front.

Disclosed are a system and a method for precisely controlling an air fuel ratio of an oil burner, which is extensively used in a household boiler, an industrial boiler, or a heater, using an air pressure sensor. The system includes a power supplying part, a fan for supplying air required for combustion of the oil burner by receiving driving voltage from the power supplying part, a fan driving part serving as a controller which drives the fan, an air pressure sensor, which is installed at a side of a flow path of air supplied from the fan so as to detect an amount of the supplied air, and a contro 1 part for outputting an optimum RPM of the fan to the fan driving part by comparing a signal detected by the air pressure sensor with preset data related to an optimum amount of air. The method includes the steps of detecting an amount of air being supplied through a fan using the air pressure sensor, calculating an optimum RPM of the fan using a controller by comparing a signal about the amount of the air with preset data related to an optimum amount of air, outputting the RPM calculated by means of the controller to a fan driving part, and rotating the fan according to the calculated RPM input into the fan driving part.

A gum substance monitoring apparatus for inexpensively and easily estimating and detecting adhesion and deposition of a gum substance produced in a fuel gas onto a combustor and fuel gas supply piping extending to the combustor, includes: detection piping branched from the fuel gas supply piping configured to supply to the combustor with the fuel gas for allowing a part of the fuel gas as a sample gas to pass therethrough; and a gum substance detecting device provided on the detection piping and configured to detect an extent of adhesion of the gum substance produced in the fuel gas, the gum substance detecting device including a simulated passage member having a simulated passage for passage of the sample gas therethrough which is formed by simulating fuel gas piping of the fuel gas supply piping extending in a portion subject to gum substance monitoring which is located downstream of a branch point at which the detection piping is branched from the fuel gas supply piping, the gum substance detecting device being configured to be capable of detecting an extent of adhesion of the gum substance onto the simulated passage member.

A combustion control method for a burner comprises: the fuel supplying means outputs a given amount of fuel oil to the fuel oil atomizing means; the fuel atomizing means sprays fuel atomized gas; said gas is ignited by the igniter; the amount of air is sent to facilitate burning by the air blowing means; the outputting flow rate of fuel oil and the flow rate of air are adjusted automatically, simultaneously and proportionally by controlling the rotating speed of the electric motors of the fuel supplying means and the air blowing means. An autocontrol burner comprises a main body, an oil pump (2), a blower fan (1), a spray gun (9) and an ignition gun (10), and further comprises a programmable control unit (18), motor speed controller (16, 17) and a signal acquisition assembly. The output port of the signal acquisition assembly is connected with the input port of the programmable control unit (18). The oil pump (2) and the blower fan (1) are connected with the programmable control unit (18) by the motor speed controller (16, 17).

There is provided a control device of a coal pulverizer which enables estimation of a coal output with a precision suited for a purpose. In a control device of a coal pulverizer which pulverizes coal by the coal pulverizer and estimates coal output by which the pulverized coal is output to a boiler, the control device includes a main operation circuit which calculates a command signal associated with a coal feed rate on the basis of detection data from a boiler or a power generator connected to the boiler, and an additional control unit which calculates the deviation between a standard coal output pattern preset in the coal pulverizer, and a current coal output pattern, and adds a calculation result by the additional control unit to the main operation circuit as a correction signal.

This invention refers to a system that is automated and controlled through a software; for the storage and application of additives and / or sulfur inhibitors containing magnesium oxide and their accurate dosing in solid or liquid fossil and alternate fuels, preferably used in rotary furnaces for the production of Clinker / cement and in steam generating boilers. Additionally, this invention is characterized for having the power to increase the use of fossil and alternate fuels without altering the characteristics of cements or concretes as the final product of cement.