In one aspect a pilot assembly is disclosed for use with a flare having a first flare stack and a second flare stack, each having discharge ends. The pilot assembly comprises a pilot nozzle assembly, a pilot inlet pipe having a pilot fuel inlet, and a pilot ignition system. The pilot nozzle assembly comprises a connecting member, a pilot nozzle inlet, a first pilot nozzle and a second pilot nozzle. The pilot nozzle assembly can direct a quantity of pilot gas received via the pilot inlet pipe out through the first and second pilot nozzles. The first and second pilot nozzles may both be positioned adjacent the discharge end of either one of the first or second flare stacks. Alternatively, the first pilot nozzle may be positioned adjacent the first flare stack's discharge, and the second pilot nozzle may be positioned adjacent the second flare stack's discharge end.

A system configured to generate heat when supplied with a first fuel or a second fuel can include a fuel supply line operatively connected to a fuel source. A valve assembly can be operatively connected to the fuel supply line. A main burner can be operatively connected to the valve assembly. A thermoelectric generating system can be configured to transform heat to electricity. A first pilot burner can include at least one of a first thermocouple and a first Fe-ion sensor. A second pilot burner can include at least one of a second thermocouple and a second Fe-ion sensor. A printed circuit board (PCB) can be operatively connected to the valve assembly and the first and second pilot burners. The PCB can be configured to control operation of the valve assembly based on information received from at least one of the first and second pilot burners.

In one aspect a pilot assembly is disclosed for use with a flare having a first flare stack and a second flare stack, each having discharge ends. The pilot assembly comprises a pilot nozzle assembly, a pilot inlet pipe having a pilot fuel inlet, and a pilot ignition system. The pilot nozzle assembly comprises a connecting member, a pilot nozzle inlet, a first pilot nozzle and a second pilot nozzle. The pilot nozzle assembly can direct a quantity of pilot gas received via the pilot inlet pipe out through the first and second pilot nozzles. The first and second pilot nozzles may both be positioned adjacent the discharge end of either one of the first or second flare stacks. Alternatively, the first pilot nozzle may be positioned adjacent the first flare stack's discharge, and the second pilot nozzle may be positioned adjacent the second flare stack's discharge end.

A system configured to generate heat when supplied with a first fuel or a second fuel can include a fuel supply line operatively connected to a fuel source. A valve assembly can be operatively connected to the fuel supply line. A main burner can be operatively connected to the valve assembly. A thermoelectric generating system can be configured to transform heat to electricity. A first pilot burner can include at least one of a first thermocouple and a first Fe-ion sensor. A second pilot burner can include at least one of a second thermocouple and a second Fe-ion sensor. A printed circuit board (PCB) can be operatively connected to the valve assembly and the first and second pilot burners. The PCB can be configured to control operation of the valve assembly based on information received from at least one of the first and second pilot burners.

A system configured to generate heat when supplied with a first fuel or a second fuel can include a fuel supply line operatively connected to a fuel source. A valve assembly can be operatively connected to the fuel supply line. A main burner can be operatively connected to the valve assembly. A thermoelectric generating system can be configured to transform heat to electricity. A first pilot burner can include at least one of a first thermocouple and a first Fe-ion sensor. A second pilot burner can include at least one of a second thermocouple and a second Fe-ion sensor. A printed circuit board (PCB) can be operatively connected to the valve assembly and the first and second pilot burners. The PCB can be configured to control operation of the valve assembly based on information received from at least one of the first and second pilot burners.

The present invention provides a dual fuel ignition device and a work method thereof, wherein the ignition device can output electric potential according to the opposite in-series connection of two thermocouples in a high-heating value gas igniting end and a low-heating value gas igniting end and the heating condition of the thermocouples, and can control the switching on or off of a control valve on a gas flow according to the effective heat electric potential generated by the thermocouples in the process of ignition, so as to avoid the danger condition that the main burner generates high fire caused by the misoperation of the gas appliance, therefore, the safe use can be guaranteed.

According to one implementation a dual-fuel wall heater is provided that comprises a gas burner suitable for receiving a first gas or a second gas, a first pilot burner adapted to the first gas and a second pilot burner adapted to the second gas. The heater includes at least one pressure regulator, a control valve in fluid communication with the pressure regulator, and a selector valve in fluid communication with a gas outlet of the control valve. Each of the first and second pilot burners is arranged to direct a flame toward respective first and second thermocouples. The control valve includes an electromagnetic valve electrically connected to both the first and second thermocouples, the first and second thermocouples being arranged electrically connected in reverse polarity, such that in the event of the second gas being improperly supplied to the first pilot burner the resulting electromotive force generated by the first and second thermocouples is less than a disengagement threshold value of the electromagnetic valve.

A combustion system includes a perforated flame holder configured to hold a main combustion reaction substantially between input and output faces thereof. A main fuel nozzle is positioned to emit a main fuel stream toward the input face. An igniter assembly is configured to ignite a preheat flame supported by the main fuel stream between the main fuel nozzle and the perforated flame holder, and to selectably control a degree of ignition of the fuel stream by the preheat flame. During a start-up of the combustion system, the perforated flame holder is preheated by the preheat flame. When the perforated flame holder reaches a start-up temperature, the preheat flame is shifted from fully igniting to partially igniting the fuel stream, allowing fuel and oxidant to reach the perforated flame holder. A flame is ignited in the perforated flame holder while the preheat flame burns. The preheat flame is then released.

A system configured to generate heat when supplied with a first fuel or a second fuel can include a fuel supply line operatively connected to a fuel source. A valve assembly can be operatively connected to the fuel supply line. A main burner can be operatively connected to the valve assembly. A thermoelectric generating system can be configured to transform heat to electricity. A first pilot burner can include at least one of a first thermocouple and a first Fe-ion sensor. A second pilot burner can include at least one of a second thermocouple and a second Fe-ion sensor. A printed circuit board (PCB) can be operatively connected to the valve assembly and the first and second pilot burners. The PCB can be configured to control operation of the valve assembly based on information received from at least one of the first and second pilot burners.

The present invention provides a dual fuel ignition device and a work method thereof, wherein the ignition device can output electric potential according to the opposite in-series connection of two thermocouples in a high-heating value gas igniting end and a low-heating value gas igniting end and the heating condition of the thermocouples, and can control the switching on or off of a control valve on a gas flow according to the effective heat electric potential generated by the thermocouples in the process of ignition, so as to avoid the danger condition that the main burner generates high fire caused by the misoperation of the gas appliance, therefore, the safe use can be guaranteed.