Abstract:
An explosive gas incinerator system comprises a fume source inlet for receiving a process exhaust with a volatile material that is explosive when its concentration exceeds a lower explosive limit (LEL). A source flowmeter measures the volume of process exhaust being input. A temperature sensor measures the temperature of the process exhaust. A motorized damper is used for diluting the process exhaust with an ambient air input to produce a damper outflow with an explosive concentration less than the LEL. A damper flowmeter measures the total mixture volume of the process exhaust and ambient air input in the damper outflow. Another temperature sensor measures the temperature of the damper outflow. A gas monitor measures the concentration of volatile material in the damper outflow. An oxidizer burns the damper outflow in a flame to produce a cleaner exhaust, and a fan forces gas flows through the oxidizer. A system controller is connected to receive measurement data from the flowmeters, gas monitor, and temperature sensors, and is connected to control the motorized damper to maintain the damper outflow into the oxidizer below the corresponding LEL of the volatile material. Operator errors and attempts at sabotage can be detected and controlled.
Abstract:
A device and method for controlling the flow of a gaseous fuel from a fuel supply to a pressurized combustion chamber. A fuel pump is included in the gas train from supply to chamber. The fuel pump increases the pressure of the gas to allow efficient injection into the chamber. The pump is modulated to control the fuel flow. Both alternating current and pulse-width-modulated direct current signals may be used to control the flow. The pump may be a piston pump or a diaphragm pump. Feedback may be provided from sensors that determine operating parameters of the engine and such sensor signals may be used by the controller to maintain a parameter, such as temperature, at a specified value. An acoustic filter can be included in the gas train to significantly reduce gas flow pulsations generated by the pump. This filter improves the uniformity of the combustion process.
Abstract:
A valve (1) for supplying fuel gas to a gas appliance comprises a valve housing (2) having a valve chamber (3) extending therethrough. Fuel gas is supplied through an inlet port (5) to the valve chamber (3) and from main and secondary outlet ports (6,7) to a burner and a pilot light jet, respectively, of the gas appliance. A primary valving member (35) and a secondary valving member (36) co-operate with a primary valve seat (15) and a secondary valve seat (20), respectively, for isolating the main and secondary outlet ports (6,7) from the inlet port (5). A main carrier member (30) carries the primary valving member (35) and is magnetically coupled to a first secondary carrier member (31) which is driven by a stepper motor (38). A second secondary carrier member (32) is magnetically coupled to the main carrier member (30) for carrying the secondary valving member (36). Electromagnetic coils (60,61) magnetically couple the first and second secondary carrier members (31,32) to the main carrier (30) so that the drive motor (38) can operate the main carrier (30) and in turn the primary and secondary valving members (35,36) for opening and closing primary and secondary communicating passageways (19,25) through the primary and secondary valve seats (15,20). Isolating the coils (60,61) from a power supply causes the first and second carrier members (31,32) to be decoupled from the main carrier (30), and first compression springs (65,66) urge the primary valving member (35) into engagement with the primary valve seat (15) while a second compression spring (80) urges the secondary valving member (36) into engagement with the secondary valve seat (20) the outlet ports (6,7) from the inlet port (5).
Abstract:
An equilibrating flow distributor for a gas turbine engine includes a balancing valve and multiple flow dividers, each with a movable valve or divider member. The balancing valve has an inlet receiving media at a first pressure area and an outlet defining a plurality of first metering orifices. The valve member defines at least one second metering orifice receiving the media at a second pressure area. Each flow divider has an inlet receiving the media through an associated one of the first metering orifices at a third pressure area and an outlet defining one of a plurality of third metering orifices receiving the media at a fourth pressure area. Each flow divider has a second pressure area in communication with second pressure area of the balancing valve. Flow through the fourth pressure area of each flow divider is substantially the same.
Abstract:
A gas processing system and method for blending wet well head natural gas with compressed natural gas is provided. The system has two inlets in communication with a blending chamber. The blending chamber is preferably defined by a heat exchanger. One inlet receives an amount of raw wet well head natural gas therethrough. The second inlet receives an amount of processed and compressed natural gas therethrough. The two gases are mixed and sent to a downstream destination.
Abstract:
A thermostat for cooking appliances powered by gas includes a body defining an inlet conduit and an outlet conduit that receive a gas flow from a supply source and to supply it to a gas burner, and a chamber having a substantially cylindrical shape that is in fluid communication with the inlet conduit, and also with the outlet conduit either directly, through a main opening formed at one end thereof, or indirectly, through a secondary conduit formed in the body of the thermostat. The gas flows into the outlet conduit bypassing the main opening. A one-piece valve adjusting the gas flow rate is coaxially fitted in the chamber and guided by its peripheral walls. These features make the structural configuration of the thermostat body and its conduits is much more compact, functional and less expensive than in thermostats known in the art.
Abstract:
A system includes a cooler configured to cool a first gas portion of a compressed gas fuel and discharge a cooled fluid. The cooled fluid comprises a cooled gas portion and a cooled liquid portion. The system also includes a separator configured to separate the cooled fluid into the cooled gas portion and the cooled liquid portion and a mixing tank configured to mix a second gas portion of the compressed gas fuel with the cooled gas portion in direct contact with one another to produce a superheated gas fuel. The superheated gas fuel comprises a degree of superheat above a lower threshold for a combustion system.
Abstract:
To allow the supply of an appropriate amount of gaseous fuel even if the composition of the gaseous fuel varies. A composition-independent flow meter 4 capable of measuring a flow rate without depending on the composition of the gaseous fuel is disposed in series with a thermal flow meter 3 in a supply pathway of the gaseous fuel. When the measured value of the thermal flow meter 3 and the measured value of the composition-independent flow meter 4 differ by a certain degree or higher, it is determined that there is an abnormal state, and the conversion factor with respect to the measured value of the thermal flow meter 3 is set. The composition of the gaseous fuel is estimated based on the set conversion factor, and the target supply amount of the gaseous fuel is corrected and controlled based on the estimated composition.
Abstract:
A gas valve unit includes a plurality of individually actuatable throttle sections which are arranged in parallel relation for setting a throughflow rate of a gas volumetric flow that is fed to a gas burner of a gas appliance. Each throttle section has a plurality of throttle points which are arranged in series, with the throttle points arranged in series having an opening cross section that increases along the series.
Abstract:
Methods and systems for controlling jet velocity at a burner when using heated gases and standard temperature gases are described herein. Through the use of a temperature-sensitive magnetic valve, the flow of a gas can be redirected to reduce velocity based on temperature. The temperature-sensitive magnetic valve can redirect flow of the gas based on the magnetic state of a curie material. The curie material changes the state of the temperature-sensitive magnetic valve based on the temperature of the gas. Thus, heated gases and standard temperature gases can be delivered at approximately equal velocities thus maintaining flame size and shape.