JPH08121746A - Fuel gas producing device and burner - Google Patents

Abstract

PURPOSE: To obtain a device for producing fuel gas, capable of being burnt while increasing the duration of combustion remarkably at a high temperature, from a fuel, such as an alcohol or the like which is provided with a low heat amount, and a burner utilizing the fuel gas. CONSTITUTION: When a gas fuel is produced from a liquid fuel, such as an alcohol or the like, and the gas fuel is burnt in a combustion chamber 28 to conduct generated primary fuel gas out of a gas flow down pipe 34 through a combustion gas discharging port 30, pressure air is injected from an air nozzle 36 in the combustion chamber 28 toward the gas flow down pipe 34 to mix and react the primary fuel gas with the injected air stream and produce fuel gas, burning for a long period of time at a high temperature while exciting the molecules of carbon, hydrogen and oxygen, then, air is mixed into the fuel gas to burn it at a high temperature. The exhaust gas of combustion is guided into a fuel heating chamber 24 to heat liquid fuel, passing through a heat exchanging pipe 18, and obtain the gas fuel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine, an external combustion engine, a boiler, a stove, a fuel cell, and other devices for producing fuel gas as fuel, and a burner for burning the fuel gas.

[0002]

2. Description of the Related Art Conventional fuels for internal combustion engines, external combustion engines, boilers, etc. as described above use petroleum, fossil fuels such as coal, alcohol, natural gas or gas produced from petrochemical fuels. In either case, it is necessary to maintain the combustion temperature at a high temperature in order to burn it with high efficiency, but at high temperature combustion, nitrogen oxides (NOx)
There is a problem that is generated.

[0003]

Accordingly, in an automobile engine or the like which is not provided with an exhaust gas denitration device,
There was no choice but to lower the combustion temperature, and there was a limit to improving the thermal efficiency (fuel consumption). Even if the combustion temperature is lowered, N
There is a problem that the emission of Ox cannot be suppressed sufficiently.

Further, each of the above-mentioned fuels other than alcohol is a non-renewable fuel, which causes exhaustion of resources.
It includes problems such as destruction of nature due to mining.

On the other hand, the so-called biomass, which can be regenerated by the cycle of plant → alcohol → CO ₂ + H ₂ O → plant and has no regional uneven distribution of raw materials, for example, when compared with gasoline, alcohol is To get the same energy, it requires three times the volume of gasoline,
As a result, there are problems such as transportation costs, storage costs, a large fuel tank capacity when used in an automobile, a small output per vehicle weight, and difficulty in cold start.

The present invention has been made in view of the above-mentioned problems of the prior art. Not only can it be burned at a high temperature from alcohol, petroleum, natural gas, etc., but also nitrogen oxides are generated by the burning. The amount of heat generated is very small and about three times that of the conventional amount of heat expected for the fuel used as the raw material can be obtained. Therefore, the amount of heat generated per unit volume is greatly increased. It is an object of the present invention to provide a device for producing a fuel gas that can be sufficiently used as a fuel for automobiles and the like even with alcohol which is a renewable fuel, and a burner for burning this fuel gas.

[0007]

According to a first aspect of the present invention, a plurality of heat exchange pipes through which liquid fuel passes, a pump for pressure-feeding the liquid fuel to the inlet side of the heat exchange pipes, and the plurality of heat exchange pipes are provided. Of the heat exchange pipe, which is arranged to be connected to the outlet side of the heat exchange pipe, surrounds the heat exchange pipe, and a pressure accumulating chamber for accumulating the gas fuel generated from the liquid fuel by heating in the heat exchange pipe,
Further, a high-temperature fluid is passed around it, and a fuel heating chamber for heating the liquid fuel in the heat exchange pipe by the high-temperature fluid is communicated with the pressure accumulating chamber. A combustion chamber for combustion and an inner diameter smaller than the inner diameter of the primary combustion gas discharge side end of the combustion chamber are provided.
The gas flow-down pipe connected to the end of the next combustion gas discharge side with a step and the air jet port at the tip are on the combustion chamber side near the step, and the pressurized air is jetted toward the gas flow-down pipe to The above object is achieved by a fuel gas generation device including an air nozzle that forms a mixed flow with combustion gas and uses it as fuel gas.

According to a second aspect of the present invention, the fuel gas generation device is a combustion exhaust gas obtained by burning at least a part of the fuel gas generated by the mixed flow with the high temperature fluid supplied to the heating chamber. It may be at least one of the fluids heated by the combustion.

Further, in the fuel gas generator, a fuel layer for burning the liquid fuel is provided on the inner circumference of the combustion chamber, and the liquid fuel is also burned in the fuel layer. Good.

Further, the fuel gas generation device according to claim 4
As described above, a primary combustion air intake port may be provided in the combustion chamber near the air nozzle upstream of the air nozzle.

In the fuel gas generator, the combustion chamber may have a pressure resistant structure, and the primary combustion air may be pressurized air.

Further, in the fuel gas generator, the fuel gas generator according to claim 6 is provided.
As described above, an adjusting valve for adjusting the flow rate of the gas fuel may be provided in the gas fuel passage between the pressure accumulating chamber and the combustion chamber.

According to a seventh aspect of the present invention, a plurality of heat exchange pipes through which the liquid fuel passes, a pump for pressure-feeding the liquid fuel to the inlet side of the heat exchange pipe, and an outlet of the plurality of heat exchange pipes. And a pressure accumulating chamber for accumulating gas fuel generated from liquid fuel by heating in the heat exchange pipe, and surrounding the heat exchange pipe, and passing a high-temperature fluid around the heat exchange pipe to increase the high temperature. A fuel heating chamber that heats the liquid fuel in the heat exchange pipe with a fluid, a combustion chamber that communicates with the pressure accumulating chamber, introduces pressure-accumulated gas fuel, and mixes with air for primary combustion. A gas flow-down pipe having an inner diameter smaller than the inner diameter of the end of the primary combustion gas discharge side and connected with a step to the end of the primary combustion gas discharge side, and an air ejection port at the tip are provided on the combustion chamber side near the step. Yes, in the gas flow pipe An air nozzle that ejects pressured air to form a mixed flow with the primary combustion gas and uses it as fuel gas; and an igniter that ignites the fuel gas that flows down from the gas flow pipe and is mixed with air. The above object is achieved by a burner having

The burner according to claim 8, wherein the high temperature fluid supplied to the heating chamber is a combustion exhaust gas obtained by combustion of a fuel gas ignited and burned by the ignition device, and a fluid heated by the combustion. May be at least one of the above.

Further, the burner has a structure as described in claim 9.
The high temperature fluid supplied to the heating chamber may be combustion gas obtained by burning a part of the fuel gas in the heating chamber.

The burner according to claim 10
As described above, a fuel layer for burning the liquid fuel may be provided on the inner circumference of the combustion chamber, and the liquid fuel may also be burned in the fuel layer.

The burner may be provided with a primary combustion air intake port in the combustion chamber in the vicinity of an upstream side of the air ejection port of the air nozzle.

In the burner, the combustion chamber may have a pressure resistant structure, and the primary combustion air may be pressurized air.

Further, the burner may be provided with an adjusting valve for adjusting the flow rate of the gas fuel in the gas fuel passage between the pressure accumulating chamber and the combustion chamber.

[0020]

According to the present invention, the fuel is heated or burned to generate swirling flow of the generated primary fuel gas and air.
It is based on the discovery that it is possible to decompose the hydrocarbons in the primary fuel gas into carbon and hydrogen and to generate a fuel gas with increased activity of these by mixing with a mixed flow composed of a vortex or a vortex. This fuel gas can be burned with high efficiency and high temperature.

According to the first aspect of the invention, the gas fuel is burned in the combustion chamber between the tip of the air nozzle and the gas flow pipe by ejecting the pressure air from the air nozzle at the upstream position of the gas flow pipe. Generated primary fuel gas and the air from the air nozzle swirl, and / or
Alternatively, by forming a mixed flow by a vortex, the hydrocarbons in the primary fuel gas can be decomposed into carbon and hydrogen, and a fuel gas containing carbon and hydrogen that is easily combusted can be obtained.

Further, since the liquid fuel is preheated and introduced into the combustion chamber in the state of the gas fuel to be burned, the thermal efficiency is high, and the pressure of the gas fuel is accumulated in the pressure accumulating chamber. Supply gas fuel in response to fluctuations,
Optimal reaction can be obtained.

According to the second aspect of the invention, the liquid fuel is heated by the combustion exhaust gas obtained by the combustion of the produced fuel gas or the high temperature fluid such as steam or hot water heated by this combustion. It is possible to efficiently promote conversion of the liquid fuel into a gas fuel.

According to the third aspect of the invention, the liquid fuel is also combusted in the fuel layer provided around the combustion chamber, so that the combustion in the combustion chamber can be stably maintained. Further, for example, even when the supply of the gas fuel is stopped, the combustion in the idling state can be maintained.

According to the invention of claim 4, since the primary combustion air intake is provided in the vicinity of the air nozzle upstream of the air nozzle, the primary combustion is provided at a position close to the upstream side of the air nozzle. Therefore, there is no waste, and the length of the combustion chamber can be shortened. Furthermore, the vicinity of the air nozzle ejection port can be cooled.

According to the fifth aspect of the present invention, since the combustion chamber can be maintained at a high pressure, the equipment for supplying and burning the generated fuel gas requires a high pressure, for example, a boiler or a boiler that requires pressure to blow fuel, It can be applied to gas turbines and the like.

According to the sixth aspect of the invention, the gas fuel for the primary combustion can be supplied according to the load variation of the fuel gas by the adjusting valve for adjusting the flow rate of the gas fuel. For example, when fuel gas is used in an engine, the flow rate of the gas fuel is reduced to store the gas fuel in the pressure accumulating chamber when the load on the engine is small, and the pressure is accumulated when the load increases rapidly during acceleration or the like. The stored gas fuel can be supplied rapidly.

According to the invention of claim 7, the secondary fuel gas obtained by the reaction between the primary fuel gas and air is mixed with air and burned, so that the heat energy can be obtained with high efficiency. .

According to the experiments conducted by the present inventor, it was possible to obtain about 3 to 6 times as much energy as the ordinary heat energy obtained by burning alcohol.

Therefore, the fuel consumption amount is much smaller than that of the conventional burner of this kind, and therefore, the components such as carbon dioxide gas in the combustion exhaust gas are compared with the case of burning the same amount of liquid fuel. , 1/3 or less.

According to the eighth aspect of the present invention, the high temperature combustion exhaust gas generated by the combustion of the fuel gas is guided to the heating chamber, and the liquid fuel is heated by this heat, so that the liquid fuel is efficiently promoted into a gas fuel. Can be made.

According to the invention of claim 9, the liquid fuel is heated by the heat of combustion by burning a part of the fuel gas in the heating chamber, so that the liquid fuel can be heated to a high temperature, for example, gasification. It is suitable when using a difficult liquid fuel.

According to the tenth aspect of the invention, the liquid fuel is also combusted in the fuel layer provided around the combustion chamber, so that the combustion in the combustion chamber can be stably maintained.

According to the invention of claim 11, since the primary combustion air intake is provided in the vicinity of the upstream side of the air nozzle of the air nozzle, the primary combustion is located at a position close to the upstream side of the air nozzle. Therefore, there is no waste, and the length of the combustion chamber can be shortened. Furthermore, the vicinity of the air nozzle ejection port can be cooled.

According to the twelfth aspect of the present invention, since the combustion chamber can be maintained at a high pressure, the equipment for supplying and burning the generated fuel gas has a high pressure, for example, a boiler or the like which requires a pressure for blowing fuel. Can be applied to.

According to the thirteenth aspect of the present invention, the gas fuel for the primary combustion can be supplied according to the load fluctuation of the fuel gas by the adjusting valve for adjusting the flow rate of the gas fuel.

[0037]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a burner 10 which also serves as a fuel gas generator according to the first embodiment of the present invention. The burner 10 burns a gas fuel generation unit 12 that generates a gas fuel from a liquid fuel and a gas fuel generated by the gas fuel generation unit 12 to generate a primary fuel gas.
It is composed of a fuel gas generation unit 14 that mixes the next fuel gas with the pressurized air flow to react, and a burner unit 16 that ignites and burns the fuel gas generated by the fuel gas generation unit 14.

The gas fuel generating section 12 has a plurality of heat exchange pipes 18 through which the liquid fuel passes, and a fuel pump 20 for pressure-feeding the liquid fuel to the inlet side of the heat exchange pipes 18.
And a pressure accumulating chamber 22 arranged to be connected to the outlet side of the plurality of heat exchange pipes 18 for accumulating gas fuel generated from liquid fuel by heating with the heat exchange pipes, and the periphery of the heat exchange pipes 18. A fuel heating chamber 24 that surrounds and heats the liquid fuel in the heat exchange pipe 18 with the high temperature fluid by passing the high temperature fluid around it.

The fuel gas generating section 14 has a horizontally-placed cylindrical combustion chamber 28 having a fuel layer 26 made of a continuous foam metal into which liquid fuel permeates, and a combustion chamber 28 at the right end in the drawing. A gas flow-down pipe 34, which has a smaller diameter than that of the gas outlet 30 and is connected with a step 32.
And is inserted horizontally in the combustion chamber 28 on the central axis thereof and from the side opposite to the combustion gas discharge port 30, an air outlet 37 at the tip is arranged in the vicinity of the step 32, and the gas flow pipe 34 is provided. An air nozzle 36 for ejecting pressurized air toward the air nozzle 36, and an air intake 38 for primary combustion which is arranged so as to penetrate through the peripheral wall of the combustion chamber 28 and supplies air to the air nozzle 36 near the air ejection port 37 upstream thereof. And the fuel layer 26
The combustion chamber 28, which is provided at a position and includes a glow plug
And a spark plug 40 for igniting the fuel inside.

The burner section 16 has an air suction hole 42 formed at an appropriate interval in the circumferential direction in the middle of the gas flow pipe 34, and a large-diameter first pipe connected to the right end of the gas flow pipe 34 in FIG. The second gas flow-down pipe 44 and the ignition plug 46 formed of a glow plug or the like arranged at the right end opening position of the second gas flow-down pipe 44 in FIG. 1 are configured.

Reference numeral 48 in FIG. 1 indicates a heating device such as an evaporator in a boiler, which is heated by a flame of a burner. The combustion exhaust gas of the burner flame that has passed through the heating device 48 passes through the duct 50 and the gas fuel generation unit 1
The second fuel heating chamber 24 is introduced into the fluid inlet 24A at the upper end position.

A fluid outlet 24B at the lower end of the fuel heating chamber 24
A suction fan 52 is attached to the fuel heating chamber 24.
The internal combustion exhaust gas can be discharged to the outside.

A liquid fuel pool 54 is provided at the lower end of the heat exchange pipe 18 in the gas fuel producing section 12, and the liquid fuel pool 54 is pressure-fed with liquid fuel from a fuel tank 58 by a fuel pump 20. It has become so.

From the fuel pump 20, the combustion chamber 2
The liquid fuel in the fuel tank 58 is pressure-fed to the fuel layer 26 of No. 8 through the fuel supply port 26A.

Reference numeral 60 in FIG. 1 is a motor for driving the fuel pump 20, 26B is a fuel recovery port for recovering the remaining fuel which has not been burned in the fuel layer 26, and 62 is a combustion chamber and the combustion chamber 22. The flow regulating valves arranged in the gas fuel supply pipe 64 between the chamber 28 and the chamber 28 are respectively shown.

The air nozzle 36 in the fuel gas generator 14 is axially slidably disposed and supported in a holding pipe 66 extending from the left end of the combustion chamber 28 in the drawing.

At the end of the air nozzle 36, which is discharged from the holding pipe 66 to the left in FIG. 1, pressurized air is supplied from an air pump 70 through a flexible tube 68. Reference numeral 72 in FIG. 1 denotes a motor for driving the air pump 70, and 74 denotes an air filter for filtering the air drawn into the air pump 70.

Further, reference numeral 76 in FIG. 1 is a liquid fuel regulating valve for controlling the flow rate of the liquid fuel supplied from the fuel pump 20 to the fuel layer 26, and 78 is arranged in the duct 50, and combustion through the duct 50 is carried out. Exhaust gas flow control valve, 80 is accumulator chamber 2
2 is a pressure sensor for detecting the pressure of the gas fuel in the pressure accumulating chamber 22, and 82 is a temperature sensor attached to the heating device 48 for detecting, for example, the hot water temperature of the heating device 48.

The detection signals of the pressure sensor 80 and the temperature sensor 82 are input to a control device 84 as shown in FIG. 2, which controls the fuel pump 20, the suction fan 52, the flow rate adjusting valve 62, and the like. The temperature of the fluid heated by the burner 10 of the heating device 48 is controlled by the air pump 70, the liquid fuel regulating valve 76, and the combustion exhaust gas flow rate control valve 78 based on the signal from the pressure sensor 80 and the signal from the temperature sensor 82. Optimally, and the pressure accumulation chamber 22
The internal pressure is controlled to be within a predetermined value.

Next, the operation of the burner 10 according to the above embodiment will be described.

First, the fuel tank 5 is driven by the fuel pump 20.
Liquid fuel, such as alcohol, from 8 to liquid fuel regulating valve 7
6, the fuel is supplied from the fuel supply port 26A of the combustion chamber 28 to the fuel layer 26, and the spark plug 40 burns the liquid fuel that has permeated the fuel layer 26 in the combustion chamber 28. The remaining liquid fuel that did not burn at this time was the fuel recovery port 26B.
From the fuel tank 58.

At the same time when the liquid fuel is ignited and burned in the fuel layer 26, the air pump 70 supplies pressurized air to the air nozzle 36. When the pressurized air is ejected from the air ejection port 37 at the tip of the air nozzle 36, the combustion chamber 2
The combustion gas of the fuel burned in 8 is the primary fuel gas,
It is entrained in the jet flow of the pressurized air and flows down along the jet flow toward the gas flow pipe 34.

At this time, when the primary fuel gas is entrained in the pressure air flow from the air ejection port 37 of the air nozzle 36, it is entrained in a swirling flow, and further, a vortex is generated at the corners of the step 32. To do.

Due to the swirling flow and the vortex flow, the pressurized air reacts with the primary fuel gas, the hydrocarbons in the primary fuel gas are decomposed into carbon and hydrogen, and the carbon, hydrogen and the remaining carbonization. The activity of hydrogen is greatly increased and converted into fuel gas. The air nozzle 36 is slid in the holding pipe 66, and the position in the front-rear direction is adjusted so that the reaction is optimal.

The fuel gas produced as described above is
Since the air from the air suction hole 42 is mixed when passing through the gas flow pipe 34, and a vortex flow is generated here as well,
Further, the same reaction as described above occurs.

After that, the gas flows out from the second gas flow-down pipe 44 having a diameter larger than that of the gas flow-down pipe 34. At this time, the ignition plug 46 ignites the fuel gas to burn it and generate a flame. This flame heats a predetermined fluid in the heating device 48.

Burner 10 discharged from heating device 48
The combustion exhaust gas of the above is supplied to the fuel heating chamber 24 in the gas fuel generating section 12 while the flow rate thereof is controlled by the combustion exhaust gas flow rate control valve 78.

On the other hand, the liquid fuel is supplied to the liquid fuel pool 54 in the gas fuel producing section 12 by the fuel pump 20, and is pumped from there through the heat exchange pipe 18 toward the pressure accumulating chamber 22.

In this process, the combustion exhaust gas introduced into the fuel heating chamber 24 is discharged from the fluid outlet 24B at the lower end of the fuel heating chamber 24 by the suction fan 52,
In the process, the liquid fuel passing through the heat exchange pipe 18 is heated. When the liquid fuel is heated to a certain temperature or higher, it vaporizes and becomes gas fuel, which is stored in the pressure accumulating chamber 22.

The gas fuel stored in the pressure accumulating chamber 22 is supplied to the left end of the combustion chamber 28 of the fuel gas generator 14 in the figure via the gas fuel supply pipe 64. At this time, the flow rate adjusting valve 62 controls the supply amount of the gas fuel.

The gas fuel supplied into the combustion chamber 28 is ignited and burned by the flame of the liquid fuel already burned in the fuel layer 26 and / or the spark plug 40.

Here, the air required for the combustion of the liquid fuel and the gas fuel in the combustion chamber 28 is taken into the combustion chamber 28 from the primary combustion idle inlet 38. At this time, since the primary combustion inlet 38 is located at a position upstream of the air jet 37 of the air nozzle 36 toward the vicinity of the air jet 37, flame is generated near the air jet 37. As a result, a primary fuel gas is formed, and at the same time as the primary fuel gas is generated, the primary fuel gas is entrained in the pressurized air flow ejected from the air nozzle 36 and reacts with the air.

Therefore, the time from the generation of the primary fuel gas to the entrainment of the air flow from the air nozzle is short, the efficiency is high, and the primary combustion air intake port 38 is provided.
By the inflowing air from the above, the vicinity of the air ejection port 37 of the air nozzle 36 is appropriately cooled so as not to overheat.

In the above process, for example, the gas fuel generating section 12
When the temperature sensor 82 detects that the amount of gas fuel supplied from the fuel gas generator 14 to the fuel gas generation unit 14 is excessive and the temperature of the heating device 48 is too high, the flow rate adjusting valve is output by a command signal from the controller 84. When the gas fuel supply amount is reduced by 62, and when the pressure in the pressure accumulating chamber 22 becomes excessive, the control device 84 reduces the liquid fuel supply amount by the fuel pump 20 based on the signal from the pressure sensor 80, and
The combustion exhaust gas flow rate control valve 78 reduces the amount of combustion exhaust gas supplied into the fuel heating chamber 24 and returns the pressure in the pressure accumulating chamber 22 to a normal level.

Further, when the heating amount by the burner 10 in the heating device 48 is insufficient, the supply amount of the gas fuel to the combustion chamber 28 is increased and at the same time, the pressurized air supply amount from the air pump 70 is also increased to increase the burner. Strengthen the flame in part 16.

When operating the burner 10,
When the combustion of the gas fuel in the combustion chamber 28 reaches a steady state, the liquid fuel supply to the fuel layer 26 may be stopped. In this case, the efficiency is improved because only the preheated gas fuel is burned.

The burner 10 of the above embodiment is a case where the flame discharge destination is in a state equal to the atmospheric pressure. For example, when the flame is blown into a closed space having a pressure higher than the atmospheric pressure, As shown in FIG. 3, the air is supplied from the air pump 86 to the primary combustion air intake port 38 and the air intake hole 42. In this case, the combustion chamber 2
8 is preferably a pressure resistant structure.

In the above embodiment, the gas fuel and the liquid fuel are combusted in the combustion chamber 28, but the present invention is not limited to this, and the liquid fuel is not combusted. Alternatively, only the gas fuel may be burned.

Further, in the above-mentioned embodiment, the combustion exhaust gas after heating the heating device 48 is supplied to the fuel heating chamber 24. However, as shown in FIG. The heated high temperature fluid may be supplied through a pipe 90 equipped with a flow rate adjusting valve 88. Further, as shown in FIG. 5, a part of the fuel gas is branched from the gas flow-down pipe 34, and this is burned in the fuel heating chamber 24, or is burned before this, and the combustion gas is burned. The liquid fuel may be heated by.
Reference numeral 92 in the drawing denotes a sub-burner for burning the fuel gas branched from the gas flow pipe 34.

Further, a part of the liquid fuel is introduced into the fuel heating chamber 24 and is burned there, whereby the heat exchange pipe 1
The liquid fuel in 8 may be heated.

Further, in the above-mentioned embodiment, the gas fuel producing section 12 is arranged such that the heat exchange pipe 18 is placed vertically and the liquid fuel is supplied from the lower side thereof, and the gas fuel is taken out into the upper pressure accumulating chamber 22. However, the heat exchange pipes may be arranged horizontally or inclined.

Further, although the above-mentioned respective embodiments are all related to the burner, the present invention is also applied to the fuel gas generator in the state where the burner portion 16 in the first embodiment is removed. .

In this case, the fuel gas generated by the fuel gas generator 14 is delivered to a predetermined location or stored in a cylinder without being mixed with air. Further, the fuel gas may be supplied by being connected to, for example, the air supply pipe portion of the engine in a state where the air is not mixed with the fuel gas.

The liquid fuel in the above embodiments is methyl alcohol, ethyl alcohol, or petrochemical fuel such as light oil, kerosene, gasoline, etc., and liquid fuel which becomes gaseous when heated above a certain temperature is applied.

Of the various liquid fuels mentioned above, ethyl alcohol is a renewable fuel that can be produced from plants.
It is most desirable to use this ethyl alcohol.

[Brief description of drawings]

FIG. 1 is a sectional view including a partial block diagram showing an embodiment of a burner that also serves as a fuel gas device according to the present invention.

FIG. 2 is a block diagram showing a control system of the burner of the same embodiment.

FIG. 3 is a schematic side view showing a second embodiment of the present invention.

FIG. 4 is a block diagram showing a third embodiment of the present invention.

FIG. 5 is a block diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Burner 12 ... Gas fuel production | generation part 14 ... Fuel gas production | generation part 16 ... Burner part 18 ... Heat exchange pipe 20 ... Fuel pump 22 ... Accumulation chamber 24 ... Fuel heating chamber 26 ... Fuel layer 28 ... Combustion chamber 30 ... Fuel gas exhaust Outlet 32 ... Step 34 ... Gas downflow pipe 36 ... Air nozzle 37 ... Air ejection port 38 ... Primary combustion air intake 40, 46 ... Spark plug 42 ... Air suction hole 44 ... Second gas downflow pipe 48 ... Heating device 62 ... Flow rate adjusting valve 64 ... Gas fuel supply pipe 70, 86 ... Air pump 92 ... Sub burner

Claims (13)

[Claims] 1. A plurality of heat exchange pipes through which liquid fuel passes, a pump for pressure-feeding liquid fuel to the inlet side of the heat exchange pipes, and a plurality of heat exchange pipes connected to the outlet side of the heat exchange pipes. Arranged, accumulating chamber for accumulating gas fuel generated from liquid fuel by heating in the heat exchange pipe, and surrounding the periphery of the heat exchange pipe, and passing a high temperature fluid around the periphery,
A fuel heating chamber that heats the liquid fuel in the heat exchange pipe with the high-temperature fluid, and a combustion chamber that communicates with the pressure accumulating chamber, introduces pressure-accumulated gas fuel, and mixes with air for primary combustion. A gas flow pipe having an inner diameter smaller than the inner diameter of the primary combustion gas discharge side end of the chamber, which is connected to the primary combustion gas discharge side end with a step, and an air jet port at the tip,
An air nozzle which is located in the vicinity of the step and on the side of the combustion chamber, ejects pressurized air toward the gas flow pipe, forms a mixed flow with the primary combustion gas, and serves as fuel gas. Fuel gas generator. 2. The high temperature fluid supplied to the heating chamber according to claim 1, wherein the combustion exhaust gas obtained by burning at least a part of the fuel gas generated by the mixed flow and the fluid heated by the combustion. At least one of the above. 3. The fuel gas generator according to claim 1 or 2, wherein a fuel layer for burning liquid fuel is provided around the combustion chamber, and the liquid fuel is also burned in the fuel layer. 4. The fuel gas generator according to claim 1, wherein an air inlet for primary combustion is provided in the combustion chamber in the vicinity of an air jet outlet upstream of the air nozzle. 5. The fuel gas generator according to claim 1, wherein the combustion chamber has a pressure resistant structure, and the air for the primary combustion is pressurized air. 6. The fuel gas according to any one of claims 1 to 5, wherein an adjusting valve for adjusting a flow rate of the gas fuel is provided in a gas fuel passage between the accumulator chamber and the combustion chamber. Generator. 7. A plurality of heat exchange pipes through which the liquid fuel passes, a pump for pressure-feeding the liquid fuel to the inlet side of the heat exchange pipes, and a plurality of heat exchange pipes connected to the outlet side of the heat exchange pipes. Arranged, accumulating chamber for accumulating gas fuel generated from liquid fuel by heating in the heat exchange pipe, and surrounding the periphery of the heat exchange pipe, and passing a high temperature fluid around the periphery,
A fuel heating chamber that heats the liquid fuel in the heat exchange pipe with the high-temperature fluid, and a combustion chamber that communicates with the pressure accumulating chamber, introduces pressure-accumulated gas fuel, and mixes with air for primary combustion. A gas flow pipe having an inner diameter smaller than the inner diameter of the primary combustion gas discharge side end of the chamber, which is connected to the primary combustion gas discharge side end with a step, and an air jet port at the tip,
An air nozzle, which is located near the step and on the side of the combustion chamber, ejects pressurized air toward the gas flow pipe to form a mixed flow with the primary combustion gas and serves as fuel gas, and from the gas flow pipe. An igniter for igniting the fuel gas mixed with the flow-down air. 8. The hot fluid supplied to the heating chamber according to claim 7, wherein at least one of a combustion exhaust gas obtained by combustion of a fuel gas ignited and burned by the ignition device and a fluid heated by the combustion. A burner characterized by being. 9. The burner according to claim 7, wherein the high temperature fluid supplied to the heating chamber is a combustion gas obtained by burning a part of the fuel gas in the heating chamber. 10. The fuel layer according to claim 7, 8 or 9, wherein a fuel layer for burning liquid fuel is provided around the combustion chamber,
A burner characterized by burning liquid fuel also in the fuel layer. 11. The method according to any one of claims 7 to 10,
A burner, characterized in that an air inlet for primary combustion is provided in the combustion chamber in the vicinity of an air jet outlet of the air nozzle. 12. The method according to any one of claims 7 to 11,
A burner characterized in that the combustion chamber has a pressure resistant structure, and the air for the primary combustion is pressurized air. 13. The method according to any one of claims 7 to 12,
A burner characterized in that a regulating valve for regulating the flow rate of gas fuel is provided in a gas fuel passage between the pressure accumulating chamber and the combustion chamber.