14 results about "Pulse combustion" patented technology

A system and method are disclosed for improving fuel-air mixing in the combustion chamber of pulse combustors by deflecting the pressurized fuel injected from the one or more fuel injectors at a predetermined angle towards the centerline longitudinal axis of the combustion chamber.

A method of heating water in a tankless water heating appliance in conditions of low water flow or no water flow is disclosed. A water supply is introduced into a heat exchanger configured to transfer heat to the water supply from a burner when the water supply is contained in the heat exchanger. A pulse fire duration is determined for the burner and a pre-defined condition of the water supply is sensed. When the pre-defined condition is sensed, the burner is activated to fire for the pulse fire duration, and the burner is deactivated after the pulse fire duration is elapsed. The pre-defined condition of the water supply is monitored, such that when the pre-defined condition is sensed again, the burner is activated to fire for another pulse fire duration, and the burner is deactivated after the another pulse fire duration is elapsed.

The invention relates to the field of power engineering and can be used in heating systems, more particularly in water heaters or boilers, in disposal systems fueled by the combustion of associated gas, and in electrical energy generating systems. A pulse combustion apparatus comprises a combustion chamber 14, at least one resonant channel 28 connected to the combustion chamber 14, a device 15 for removing heat which is linked to the combustion chamber and to the resonant channel and which consists of at least one chamber and / or at least one tube for a heat-exchanging agent 16. A device for supplying air and combustible gas, which is connected to the combustion chamber 14, comprises at least one gaseous medium nonreturn valve 17 and at least one guard chamber 18 of said valve 17. The at least one gaseous medium nonreturn valve 17 is directly or indirectly linked to the device 15 for removing heat via a vibration isolator 19, 24.

A system and method for ram air intake for pulse combustion systems is disclosed that improves the ability of pulse combustions to ingest air into the inlet pipe when the pulse combustion system is moving in a direction opposite the direction the open end of the inlet pipe is facing and the system and method includes the ability to increase the thrust output from the pulse combustion system.

A system and method are disclosed for improving fuel-air mixing in the combustion chamber of pulse combustors by deflecting the pressurized fuel injected from the one or more fuel injectors at a predetermined angle towards the centerline longitudinal axis of the combustion chamber.

This invention relates to a micro-pulsating burner for gaseous fuels, comprising a micro-burner, an air intake pipe, a gas intake pipe, an electric spark hexagonal nut, and an outer electrode for the electric spark. The micro-burner consists of a front cover, a cylindrical combustion chamber, and a tailpipe. Gaseous fuel is introduced into the combustion chamber through the gas intake pipe and, under electric spark ignition, mixes and burns with air introduced through the air intake pipe. The resulting high-temperature, high-pressure gas is ejected from the tailpipe. The micro-pulsating burner of this invention offers advantages such as stable combustion position, complete combustion, reliable pulsed combustion, fast combustion speed, short combustion time, high intensity, low heat loss, and high thermal efficiency, making it promising for application in micro-energy systems.

The application belongs to the technical field of pulse combustion wind tunnel test, and discloses a hydrogen-oxygen combustion heater applied to a high-temperature air inflow pulse combustion wind tunnel. The hydrogen-oxygen combustion heater of the pulse combustion wind tunnel comprises, from front to back, a high-temperature flow-limiting throat, a mixing section, an injector, a combustion chamber and a nozzle; the high-temperature flow-limiting throat comprises, in sequence, a contraction section, a throat section and an expansion section, the expansion section is provided with an oxygen gas collecting cavity and a plurality of oxygen gas injection holes; the injector is composed of an injection unit, a front cover plate and a rear cover plate; a plurality of injection units distributed in a central symmetry mode penetrate the front cover plate and the rear cover plate from front to back; the cavity surrounded by the front cover plate, the rear cover plate and the injection unit is a hydrogen gas collecting cavity; the inner cavity channel of the injection unit is first contracted and then expanded, and the expansion section is provided with a plurality of hydrogen gas injection holes distributed uniformly in a circumferential direction. The effective mixing of high-temperature air, hydrogen and oxygen is realized, self-ignition is achieved, and high-temperature and high-pressure gas generated thereby is used to carry out wind tunnel test of air-breathing hypersonic aircraft.

This invention belongs to the field of low-permeability coal seam gas extraction technology, specifically relating to a method for enhanced gas extraction from coal seams using controllable electric pulse combustion explosion. Several boreholes are drilled within the coal seam, including combustion explosion boreholes and extraction boreholes adjacent to them. A drill rod is lowered into the combustion explosion borehole through a sealing device. An electric pulse device and an injection pipe are installed inside the drill rod, and the front end of the drill rod is sealed with a constant-pressure fracturing disc. The injection pipe is connected to a gas source containing a mixture of gas and oxygen, and the electric pulse device is connected to its control circuit. The gas inside the drill rod ignites and explodes, breaking through the constant-pressure fracturing disc and igniting the gas in the combustion explosion borehole, creating a secondary combustion explosion that disturbs the gas in the surrounding coal seam. The superposition of the two explosion waves generates a larger shock wave, causing abundant cracks in the coal seam surrounding the borehole. This method ignites the entire coal seam surrounding the borehole, resulting in good fracturing effect, low cost, and simple operation, effectively improving the gas extraction efficiency around the borehole.

The utility model relates to the technical field of pulse combustion, in particular to an anti-backfire pulse combustion device. According to the technical scheme, the device comprises a combustion box body, a cooling pipe and an outer plate, a fuel tank is fixed to the bottom end in the combustion box body, the upper surface of the fuel tank communicates with a discharging pipe, the cooling pipe is fixed to the inner wall of the combustion box body, the outer end face of one side of the cooling pipe communicates with a water inlet pipe, and the outer surface of the water inlet pipe is in threaded connection with a water inlet valve; the outer end face of one side of the cooling pipe communicates with a water outlet pipe, the outer surface of the water outlet pipe is in threaded connection with a water outlet valve, an air inlet pipe is fixedly embedded into the cooling pipe, the joint of the air inlet pipe and the cooling pipe is sleeved with a sealing plate, and the outer plate is fixedly embedded into the inner wall of the combustion box body. An inner plate is movably inserted into the outer end face of one side of the outer plate, a fixing plate is fixedly embedded into the inner wall of the combustion box body, and a connecting plate is movably inserted into the outer end face of one side of the fixing plate. According to the utility model, the anti-backfire effect is ensured.

After a simple rotor similar to a vertical axis wind driven generator blown by wind power is installed on an air supply or fuel pipeline, fuel or supplied air forms pulse flow, the pulse flow is amplified by chemical reaction in the combustion process to form stronger pulse combustion, and strong physical and chemical mixing enables the heating surface in the furnace to be clean, heat transfer to be enhanced, NOx to be reduced and the load of the furnace to be increased.

This application relates to the field of automatic control technology for industrial furnaces and kilns, and discloses a method for improving the temperature uniformity control of a walking beam furnace. The method includes: establishing a heat load space matrix, calculating the instantaneous enthalpy deviation value of the grid nodes, extracting target grids with deviations greater than a threshold and obtaining physical coordinate data; reading motion phase angle data, determining the physical obstruction separation state between the bottom surface of the slab and the walking beam mechanism, and outputting a transient timing lock status word; based on whether the pulse burner array's topology configuration belongs to synchronous ignition or alternating reversal mode, converting the physical coordinate data into asymmetric duty cycle parameters and time phase difference parameters; when there is no physical obstruction, sending the above parameters to the valve for directional thermal compensation; when physical obstruction exists, outputting a reference combustion command to the valve to restore uniform heating. This invention achieves accurate compensation for local underheating, adapts to various pipeline structures, and also ensures equipment operational safety.

The present application relates to the technical field of gasification furnace, and particularly discloses a method for realizing rapid heating of a gasification furnace by using waste gas pulse combustion. The method comprises the following steps: in the heating stage of the gasification furnace, waste gas is sprayed into the furnace in a pulse mode, the waste gas contains combustible components, and the combustible components combust and release heat in the furnace; when the temperature and pressure in the furnace reach the gasification operation conditions respectively, the spraying of the waste gas is stopped, and the conventional gasification operation is switched to. Without using any external fuel (natural gas, diesel, liquefied gas, etc.), the present application significantly improves the heating rate of the furnace in the starting stage of the pulverized coal gasification furnace, shortens the length of the entire heating section, and the heating rate of the gasification furnace is increased from the conventional 1-5 ℃ / min to 5-15 ℃ / min, and the length of the heating section is shortened from 10-18 h to ≤5 h.

The application is suitable for the technical field of combustion devices, and provides an industrial gas pulse combustion device with self-adaptive adjustment, which comprises a premixing unit, a combustion unit and a resonance exhaust unit, the premixing unit is composed of a mixing chamber, an air intake module and a gas intake module, the air intake module and the gas intake module are both composed of an induction drive control mechanism and a flow cutoff valve, a fixing seat is fixed between the air intake module and the gas intake module, and an adjusting mechanism is installed on the fixing seat; the adjusting mechanism, the induction drive control mechanism and the flow cutoff valve constitute a pure mechanical linkage adjusting system, according to the air intake pressure fluctuation, the adjusting mechanism cooperates with the induction drive control mechanism and the flow cutoff valve to self-adaptively adjust the air-fuel ratio of the gas intake module and the air intake module, so that the air-fuel ratio is quickly restored to the theoretical air-fuel ratio, the stability of the air and gas ratio in the mixing chamber is ensured, the gas molecules and oxygen molecules are fully contacted and reacted, and the emission of pollutants such as CO and NOx is reduced from the source.

A method for controlling a combustor (1) supplied with gaseous fuel, the property (P) of which has a value (PA) that varies between a minimum value (P1) and a maximum value (P2), the combustor comprising a set of fuel injectors (2a, 2b, 2c, 2d) adapted to be supplied with fuel, characterized in that the fuel injectors (2a, 2b, 2c, 2d) are arranged in the set of fuel injectors (2a, 2b, 2c, 2d). The method comprises the step of selecting one or more injectors (2a, 2b, 2c, 2d) to be supplied with fuel depending on a value (PA) of a property (P) of the fuel. A scale between the minimum value and the maximum value is divided into a plurality of value ranges, each of which is associated with one or more fuel injectors. The method comprises a step of determining a range of values to which a value (PA) of a property (P) of the fuel belongs, followed by a step of supplying fuel to one or more fuel injectors associated with this range of values, one or more other injectors being not supplied with fuel.