30 results about "Pulse combustion" patented technology

The invention discloses a rolling treatment process for one-step forming of w-shaped hinge section steel, and particularly relates to the technical field of rolling treatment processes, which comprises the following steps: S1, heating; s2, descaling is carried out; s3, rolling is conducted; s4, cooling; s5, straightening; s6, saw cutting; and S7, quality inspection. According to the rolling treatment technology for one-time forming of the W-shaped hinge section steel, the efficient production process can be achieved, the procedures from heating, descaling, rolling to cooling are closely connected, the automation degree is high, the production period is greatly shortened, the production efficiency is improved, and the production cost is reduced. Meanwhile, strict quality control measures are taken in each key step, such as a computer temperature control and pulse combustion technology in a heating process, a high-pressure system and optimized parameters in a descaling process, precise equipment and precise control in a rolling stage, and a three-section laminar cooling process in a cooling link. Therefore, the dimensional accuracy and the cross section shape of the product are ensured.

The utility model discloses a combustible gas pulse combustion utilization device which comprises a gas inlet pipe, a Tesla valve, a spark plug, a plurality of front sleeves, a plurality of rear sleeves and a gas exhaust pipe, the number of the front sleeves is the same as that of the rear sleeves, the front sleeves are sequentially sleeved together from inside to outside to form a front sleeve group, the rear sleeves are sequentially sleeved together from inside to outside to form a rear sleeve group, and the gas exhaust pipe is arranged in the rear sleeve group. The tail portion of the front sleeve set is in butt joint with the rear sleeve set, the front sleeves correspond to the rear sleeves in a one-to-one mode, a Tesla valve is fixedly arranged in the front sleeve on the innermost layer, an air inlet of the Tesla valve is communicated with an air inlet pipe, an air outlet of the Tesla valve is provided with a spark plug, and an exhaust pipe is fixedly arranged in the rear sleeve on the innermost layer. A combustion cavity is formed between the front sleeve set and the rear sleeve set, and the longitudinal section of the combustion cavity is T-shaped, square, round or oval.

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.

The application discloses a combustion temperature control method of a pulse heating furnace burner, which realizes the control of the uniformity and stability of pulse combustion from the monitoring and adjustment of two dimensions of whether the pressure parameter of a total pipe before the establishment of the burner is stable and whether the combustion performance of the burner itself is stable. The combustion temperature control method of the pulse heating furnace burner of the application starts from two aspects of whether the pressure parameter of the total pipe before the establishment of the burner is stable and whether the combustion performance of the burner itself is stable, controls the uniformity and stability of pulse combustion, provides replacement basis for the certain replacement of the burner and the valve, and saves the cost.

The invention relates to the technical field of fuel gas treatment, in particular to a multi-channel premixed biomass fuel gas pulse burner. The device comprises a stirring assembly, the stirring assembly comprises a stirring net, stirring blades are fixedly arranged in the stirring net, a motor used for driving the stirring net and the stirring blades to rotate is fixedly arranged on the side, away from the filtering bin, of the mixing bin, and a drainage assembly is arranged in the mixing bin. A motor drives a stirring net and stirring blades to rotate and stirs air and biomass gas in the mixing bin, and meanwhile, the motor drives two drainage plates to rotate and guides gas in the mixing bin to flow, so that the air and the gas in the mixing bin are fully mixed; and the situation that gas and air are not mixed uniformly, so that the gas is difficult to burn sufficiently is prevented.

The utility model belongs to the technical field of solid rocket engines, and particularly relates to an interlayer type pulse engine. The interlayer type pulse engine comprises a first-stage pulse shell, a second-stage pulse shell and a third-stage pulse shell, a second-stage pulse combustion chamber is formed in the second-stage pulse shell and is spliced with the first-stage pulse shell along the axial direction; the second-stage solid grain is arranged in the second-stage pulse combustion chamber; the interlayer device is arranged at the axial opening end, facing the first-stage pulse shell, of the second-stage pulse shell and is connected to the inner circumferential wall of the second-stage pulse shell; the interlayer device can isolate the first-stage pulse combustion chamber from the second-stage pulse combustion chamber, an axial gap is formed between the interlayer device and the second-stage pulse shell in the axial direction, and the interlayer device can move towards the second-stage solid grain in the axial direction and is connected to the axial end face of the second-stage solid grain. In the utility model, the interlayer device adopts a detachable assembly scheme and has an axial movement freedom degree, so that the grain can be conveniently checked, and the interlayer device is self-adaptive to the axial deformation of the grain.

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.

The utility model provides a pulse combustion system for a hot-dip galvanizing furnace. The pulse combustion system comprises a natural gas combustion gun, a fixed connecting rod, a movable connecting rod and an air cylinder. The middle of the natural gas burning gun is hinged to the fixed connecting rod, the tail of the natural gas burning gun is hinged to the movable connecting rod, and the free end of a piston rod of the air cylinder is hinged to the bottom end of the movable connecting rod. The piston rod of the air cylinder ascends and descends to drive the movable connecting rod to ascend and descend to drive the natural gas burning gun to vertically swing around the middle hinge shaft. The front end muzzle of the natural gas burning gun swings up and down back and forth in the combustion chamber, so that the spraying direction of burning flames swings up and down back and forth in the combustion chamber and becomes movable and adjustable, almost all the space in the combustion chamber can be burnt by the flames, and the temperature and the thermal field in the combustion chamber are more uniform; and the temperature of the zinc liquid in the zinc pot is more uniform, and the hot-dip galvanizing quality and efficiency are improved.

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 invention provides a pulse combustion control method and system, a medium and electronic equipment. The pulse combustion control method and system are applied to combustion equipment comprising a plurality of combustors. The pulse combustion control method comprises the steps that in the current pulse period, the heat output requirements of all combustors are obtained; taking the minimum fuel demand fluctuation as a target, calculating a first opening and closing time sequence of a fuel control valve of each combustor in the next pulse period according to the heat output demand, and realizing combustion control of each combustor in the next pulse period based on the first opening and closing time sequence; the total fuel demand of all the combustors is more stable and small in change, it can be guaranteed that the pressure of the fuel main pipe for supplying fuel to all the combustors is kept stable, and fluctuation of the fuel demand is reduced to the maximum extent.

The present invention discloses a burner pulse combustion control system and a control method based on weighted round-robin scheduling. The control method includes: the heating furnace PID adjustment unit calculates the power output ratio Y of the heating furnace according to the furnace temperature set value required for workpiece heating and the furnace temperature measurement value fed back by the burner group p ; the burner weighted round-robin scheduling control unit determines the combustion cycle period T, the burner reference opening duration T p , and the burner reference closing duration T on based on the power output ratio Y of the heating furnace off and the burner parameters of the burner group, compares the power output ratio Y p with the weight restart threshold Y r . If Y p < Y r , weight control is enabled, and the actual opening duration T i of each burner in the burner group within the combustion cycle period T is controlled accordingly p . If Y > Y r , weight control is not enabled, and the actual opening duration T i of each burner in the burner group within the combustion cycle period T is controlled accordingly. The present invention ensures the furnace temperature uniformity in the temperature control area and improves the workpiece heating quality

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 present invention provides a control method for a pulse heating furnace, including: S1 collecting the temperature information of billets in any two adjacent heating zones and the actual temperature information of the heating zones; S2 obtaining the burner load coefficient a of the heating zone according to the billet temperature information i ; S3 judging whether the actual temperature t of the heating zone is greater than a preset temperature, and obtaining the opening and closing states b of each burner according to the judgment result i , where, closed b i = 0, open b i = 1; S4 calling the rated power flow x of each burner in the heating zone in the database i ; S5 calculating the required predetermined gas input amount Q1 for two adjacent heating zones; S6 adjusting the gas regulating valve of the heating zone according to the calculated predetermined gas input amount Q1. This application adjusts the gas flow in real time according to the billet type, and when the heat load demand is low, it can appropriately reduce the gas flow as needed. On the premise of ensuring the best working state of the burner, it solves the problem of high energy consumption of the traditional pulse combustion control heating furnace under the low heat load demand state.

The utility model discloses a multi-tail-tube structure for a pulse combustion smoke sprayer, which comprises a combustion chamber, a plurality of tail tubes, a chemical inlet tube and venturi tubes, the combustion chamber is connected with the plurality of tail tubes simultaneously, each tail tube is connected with the venturi tube, and each venturi tube is connected with the chemical inlet tube. According to the multi-tail-tube structure for the pulse combustion smoke sprayer, the number of the tail tubes is increased, and the Venturi tube structure is utilized, so that the smoke spraying amount of the smoke sprayer is increased, and the running speed of smoke in air is increased.

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.

A kind of double-pulse solid engine diaphragm opening different time state testing device and method.The device includes test container, two-pulse false medicine, two-pulse real medicine, heat insulation layer, sponge layer, one-pulse ignition top cover, two-pulse ignition device, diaphragm, transition section, nozzle;The inner wall of test container is sequentially bonded with heat insulation layer and sponge layer, two-pulse false medicine is placed on sponge layer, two-pulse real medicine is placed in two-pulse false medicine, the right side end surface of two-pulse false medicine and two-pulse real medicine and the inner hole surface of two-pulse real medicine are bonded with diaphragm;Transition section is fixed on test container at one end, and is fixedly connected with nozzle at the other end;Two-pulse ignition device is installed at the left end of test container, and one-pulse ignition top cover is installed on two-pulse ignition device.The present application can completely and truly reproduce the working state of two-pulse combustion chamber early stage of double-pulse engine, and further determine the state of diaphragm opening different time, which is helpful to improve the understanding of diaphragm opening process, and further improve the performance of engine.

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 utility model discloses an air and gas integrated regulating valve and a heat supply system. The air and gas integrated regulating valve comprises an air valve cavity, an air valve plug, a gas valve cavity, a gas valve plug and a valve plug synchronous linkage mechanism. The valve plug synchronous linkage mechanism comprises a driving motor, a transmission device and a synchronous rotating rod. Through the mechanical rigid linkage double-valve-plug design, synchronous opening and closing of the corresponding air outlets and gas outlets can be guaranteed from the mechanical level, and the pulse combustion heat supply effect is improved; and meanwhile, the opening and closing period of each gas outlet can be conveniently adjusted by adjusting the rotating speed of the synchronous rotating rod, so that the flexible adjustment and control of the switching period of the burners are realized. In addition, the device has the advantages of being simple in overall structure, accurate in adjusting precision, high in flexibility, good in practicability, easy to popularize and apply in a large scale and the like.

The invention provides a steel rolling heating furnace pulse combustion optimization control system and a control method thereof.The system comprises a soaking section and a heating section, the heating section is divided into three independent pulse combustion control sections in the direction from the charging end to the discharging end of the heating furnace, and the three pulse combustion control sections are the first heating section, the second heating section and the third heating section correspondingly; the output end of the pulse combustion control section is connected with a pulse burner; each pulse combustion control section is provided with a coal gas ring pipe and an air ring pipe which are independent from each other, the coal gas ring pipe is provided with a coal gas adjusting stop valve, and the air ring pipe is provided with an air adjusting stop valve; the output end of the gas adjusting stop valve is connected with a gas pressure detection device; and the output end of the air conditioning stop valve is connected with an air pressure detection device. The problems of large load fluctuation of a single pulse burner, unstable hearth pressure and the like in a pulse combustion system are solved, so that full-process automatic stable operation of combustion control of the heating furnace and remarkable improvement of furnace temperature uniformity are realized.

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.

To surely perform switching to a second cooking mode by preventing deterioration and solidification of cooking oil in an oil increasing tank even when cooking in the second cooking mode in which the oil increasing tank is empty is not performed for a long period of time.SOLUTION: When a main power switch 56 is turned on, a burner controller 55 determines whether a cooking oil temperature detected by a cooking temperature sensor 10 is equal to or higher than 100°C, checks presence or absence of a history on whether a differential amount of cooking oil in an oil increasing tank 11 has been supplied to an oil tank 2 within 24 hours before the main power switch 56 is turned on if the cooking oil temperature is equal to or higher than 100°C, and prohibits the operation of a pulse combustor 3 and an electric heater 24 from the detection of the opening of an oil increasing valve 13 by an oil increasing detection switch 15 until the differential amount of cooking oil in the oil increasing tank 11 is supplied to the oil tank 2 if the history is absent.SELECTED DRAWING: Figure 1

To make it possible to reliably switch to a second cooking mode by preventing degradation and solidification of cooking oil in an increased oil tank even when cooking in the second cooking mode in which the increased oil tank becomes empty is not performed for a long period.SOLUTION: A burner controller 55 of a flyer 1 determines whether or not a cooking oil temperature detected by a cooking temperature sensor 10 is 100°C or higher when a main power switch 56 turned on and, when cooking oil temperature is 100°C or higher, prohibits operation of a pulse combustor 3 and an electric heater 24 until cooking oil for a differential amount in an increased oil tank 11 is supplied for an oil tank 2 after opening of an increased oil valve 13 is detected by an increased oil detection switch 15.SELECTED DRAWING: Figure 1

The invention is suitable for the technical field of combustion devices, and provides a self-adaptive adjustment industrial fuel gas pulse combustion device which comprises a premixing unit, a combustion unit and a resonance exhaust unit, and the premixing unit is composed of a mixing chamber, an air inlet module and a fuel gas inlet module; the air inlet module and the fuel gas inlet module are each composed of an induction drive control mechanism and a flow stop valve, a fixing base is fixed between the air inlet module and the fuel gas inlet module, and an adjusting mechanism is installed on the fixing base. The adjusting mechanism, the induction drive control mechanism and the flow stop valve form a pure mechanical linkage adjusting system, according to air inlet pressure fluctuation, the adjusting mechanism is matched with the induction drive control mechanism and the flow stop valve, the air-fuel ratio of the fuel gas inlet module and the air inlet module can be adjusted in a self-adaptive mode, the air-fuel ratio can be rapidly recovered to the theoretical air-fuel ratio, and therefore the air-fuel ratio of the fuel gas inlet module and the air inlet module can be adjusted in a self-adaptive mode. The stability of the proportion of air and fuel gas in the mixing chamber is ensured, sufficient contact reaction of fuel gas molecules and oxygen molecules is ensured, and emission of pollutants such as CO and NOx is reduced from the source.