JP2010048543A - Hydrogen-dissolved fuel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel completely burned by a burner in continuous combustion, reducing generation of soot and dust, and saving on energy by suppressing consumption of a hydrogen gas. <P>SOLUTION: The fuel in a fuel tank 1 is circulated to a circulation pipe conduit 10 by a pump 9. In the fuel, the hydrogen gas from a gas cylinder 2 is mixed, and dissolved in a supersaturated state by a hydrogen dissolving device 3. In the continuous combustion by the burner 25, a rise of flame temperature based on the combustion of hydrogen dissolved in fossil fuel, cyclically continuously affects the follow-on combustion, so that the flame temperature is increased, and a flame length is shortened. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hydrogen-dissolved fuel that is based on fossil fuels such as heavy oil and kerosene, and in which a fuel in which hydrogen gas is dissolved is continuously burned by a burner. This hydrogen-dissolved fuel is used as a steam source for water boilers in inns, hotels, super public baths, heated pool facilities, hospitals, cleaning factories, etc., or for steam turbines in ships, thermal power plants, etc. It is used for all boilers such as boilers.

  Conventionally, a boiler using both fossil fuel and hydrogen gas has been proposed by the present applicants and others (see Patent Document 1). The boiler is equipped with a heavy oil burner and a hydrogen burner, and burns with a heavy oil burner by injecting a combustion gas of hydrogen fuel burned with a hydrogen burner against a flame injected with the heavy oil burned by the heavy oil burner. The generated fossil fuel can be completely burned to improve the combustion efficiency and reduce the generation of soot.

  A hydrogen-based internal combustion engine that can use liquid fuel (gasoline) and hydrogen gas as fuel has also been proposed (see Patent Document 2). In this type, hydrogen gas generated by the hydrogen generating means is mixed with the liquid fuel as fine bubbles by the microbubble generator, and the liquid fuel mixed with the hydrogen gas is injected into the engine by the in-cylinder injector to explode and burn. To do.

JP 2007-139405 A JP 2007-77930 A

  Although the thing of the said patent document 1 concerns on the continuous combustion used for a boiler, hydrogen gas is injected toward the flame from the circumference | surroundings of a heavy oil burner, and contacts the ejection part of a heavy oil burner flame. Burn together. For this reason, it is necessary to install a hydrogen generator by electrolysis of water in the vicinity of the boiler, the boiler equipment becomes expensive, and a large amount of hydrogen gas is used to influence the hydrogen gas combustion from around the heavy oil burner. Will be consumed.

  On the other hand, in Patent Document 2, liquid fuel mixed with hydrogen is used, but it relates to explosion combustion of an internal combustion engine that needs to complete combustion in a limited amount of time. The form of combustion is different from combustion. For this reason, it is necessary to mix a relatively large amount of hydrogen with liquid fuel, hydrogen generating means for generating hydrogen gas is required, and by making hydrogen gas into microbubbles in liquid fuel by a microbubble generator. Mixed. Even if hydrogen gas may be dissolved to some extent in the liquid fuel, it is present uniformly in the liquid fuel in the form of microbubbles, and when hydrogen gas is sprayed from an injection or burner during combustion, The bubble diameter may be a restriction on finer mist droplets and may hinder good combustion.

  Therefore, the present invention continuously burns a fuel in which hydrogen gas is dissolved in fossil fuel with a burner, thereby completely burning the fossil fuel by the combustion of hydrogen and reducing the generation of soot. An object of the present invention is to provide a fuel capable of reducing the amount and saving energy.

The hydrogen-dissolved fuel according to the present invention comprises a fossil fuel and hydrogen supplied and dissolved in the fossil fuel,
A rise in flame temperature based on the combustion of the hydrogen used in a continuous fuel in a burner and dissolved in the fossil fuel has a cyclic effect on the subsequent combustion of the fuel.

  The hydrogen-dissolved fuel is based on the fact that hydrogen is dissolved in the fossil fuel, but some hydrogen gas may not be completely dissolved and may be mixed with microbubbles or nanobubbles. In the form of the burner, etc., it can be burned without any trouble, and the hydrogen-dissolved fuel includes this one.

  The hydrogen gas is dissolved in a volume ratio of 1/10 to 1/5 with respect to the fossil fuel. That is, hydrogen gas is used in an amount of 0.1 to 0.2 [l] with respect to 1 [l] of fossil fuel.

  For example, referring to FIG. 1 or 2, the hydrogen-dissolved fuel according to the present invention dissolves hydrogen in a fossil fuel in a supersaturated state by a hydrogen-dissolving device (3) that continuously mixes and dissolves hydrogen gas into fossil fuel. Generated.

Preferably, a hydrogen introduction pipe (11) for introducing hydrogen gas from the hydrogen gas supply device (2) into a circulation line (10) through which the fuel from the fuel tanks (1) (1 ₁ ) flows out and flows again. A fuel in which hydrogen is dissolved in a supersaturated state in a fossil fuel in a fresh state by circulating the fuel in the fuel tank (1) to the circulation line (10) through the hydrogen dissolving device (3). The fuel tank supplies the burner.

The fuel in which the hydrogen is dissolved in the fossil fuel is put into a fuel tank whose internal pressure is maintained at 2.5 to 4.5 [kg / cm ² ], and the fuel is burned with a capacity of 50 [l / h]. On the other hand, hydrogen gas is supplied at a rate of 0.1 to 0.4 [l / min].

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it does not have any influence on the structure of a claim by this.

  According to the first aspect of the present invention, the hydrogen dissolved in the fossil fuel evaporates and burns together with the fossil fuel, and slightly raises the flame temperature due to the combustion of the fossil fuel. This further changes the evaporation / combustion state of the subsequent fuel, and this influence further cyclically affects the combustion of the fuel supplied to the continuous combustion field. Thereby, even if the amount of hydrogen gas dissolved in the fossil fuel is small, the cyclic phenomenon can be continuously maintained in a steady state, and continuous combustion can be satisfactorily maintained. Unlike the internal combustion engine that must complete combustion within a limited time, the cyclic phenomenon is possible in continuous combustion where sufficient time can be secured.

  In particular, in the combustion of liquid fuel spray by a burner, the above evaporation process is accelerated by strong radiant heating, and if the combustion region formed downstream is high, the time required for evaporation is shortened, resulting in a flame length. Can be shortened.

  In addition, since hydrogen is dissolved in the fossil fuel, hydrogen gas fine bubbles (for example, 30 to 60 μm) such as microbubbles do not limit atomization of spray droplets of liquid fuel, and Dissolved hydrogen is uniformly mixed in the spray droplets of fossil fuel, and a good continuous combustion due to the above-described cyclic phenomenon appears evenly over the entire range injected from the burner.

  Generally, high-boiling point materials such as heavy oil and kerosene are used as fossil fuels for continuous combustion using a burner. Prominently demonstrated.

Combined with the above effects, by using this hydrogen-dissolved fuel as continuous combustion, a good flame with a short flame length due to high temperature can be obtained, and a normal fossil fuel boiler can be used as it is. Combining that combustion can prevent generation of soot and reduce boiler maintenance, it is possible to provide an effective fuel as boiler fuel. Further, the amount of hydrogen to be consumed is small, and a large-scale hydrogen generator is not required, and it is possible to provide an efficient fuel with reduced initial investment and running costs for boiler facilities and the like. In addition, the fossil fuel with high efficiency described above and the fuel by hydrogen gas reduce CO ² emission, which can contribute to the improvement of the global environment.

  According to the second aspect of the present invention, hydrogen gas having a volume ratio of 1/10 to 1/5 is sufficient with respect to fossil fuel, consumption of hydrogen gas is small, and a significant cost reduction can be achieved. Even if it is bubbled in the fossil fuel, its diameter is small (microbubble, nanobubble) and does not hinder the combustion.

  According to the third aspect of the present invention, a fuel in which hydrogen is dissolved in a supersaturated state in a fossil fuel by a hydrogen dissolving device can be easily and continuously produced with a relatively simple device.

  According to the fourth aspect of the present invention, the circulation line for circulating the fuel is provided in the fuel tank, the hydrogen gas is introduced into the circulation line and the hydrogen dissolving device is interposed to circulate the fuel in the fuel tank. Thus, a required amount of hydrogen can be dissolved in the fuel in the fuel tank in a supersaturated state, and the fuel can be supplied from the fuel tank to the burner in a fresh state to be burned.

According to the present invention according to claim 5, pressure is put hydrogen dissolved fuel to the fuel tank of 2.5~4.5 [kg / cm ^2], the pressure state hydrogen dissolved fuel held in the above-described effects An amount of hydrogen gas sufficient for efficient combustion can be dissolved. Since the internal pressure is 2.5 to 4.5 [kg / cm ² ], a low-pressure vessel is sufficient for the fuel tank, the capital investment is relatively low, and the supply amount of hydrogen gas is 0.1 Since it is ˜0.4 [l / min], it is relatively small and the running cost can be kept low. When the internal pressure is 2.5 [kg / cm ² ] or less, the amount of hydrogen gas dissolved for effective combustion is not sufficient, and even when the internal pressure is 4.5 [kg / cm ² ] or more, hydrogen gas The amount of dissolution of the solution does not increase, which increases the cost due to the pressure vessel and the like. If the hydrogen supply amount is 0.1 [l / min] or less, it is not sufficient for the above-mentioned effective combustion, and if it is 0.4 [l / min] or more, the hydrogen gas is bubbled and large bubbles (microbubbles) , Not nanobubbles), which prevents effective combustion and increases the amount of hydrogen consumed, leading to an increase in cost.

Schematic which shows the boiler which attached the hydrogen-dissolved fuel manufacturing apparatus by this invention. Schematic which shows the boiler which attached the hydrogen-dissolved fuel manufacturing apparatus by other embodiment. Schematic which shows the fuel tank which stores hydrogen-dissolved fuel. The graph which shows the relationship between the hydrogen gas supply amount and temperature rising time which made the fuel tank internal pressure a parameter.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The production apparatus for producing hydrogen-dissolved fuel according to the present invention is attached to a boiler, for example, a conventional boiler B for water heating. As shown in FIG. 1, the hydrogen-dissolved fuel manufacturing apparatus U1 includes a fuel tank 1, a hydrogen gas cylinder 2 and a hydrogen dissolving apparatus 3 constituting a hydrogen gas supply apparatus.

The fuel tank 1 is connected to a circulation pipe 10 through which the fuel in the tank flows out and flows back in. The circulation pipe is connected to the circulation valve 10 and the hydrogen gas cylinder 2 sequentially from the outflow side 10a. An introduction pipe 11, a fuel cooling device 12, and a hydrogen dissolving device 3 are interposed, and a discharge side port 3 b of the hydrogen dissolving device 3 communicates with an inlet 10 b to the tank 1. Hydrogen gas of H ₂ hydrogen gas cylinder 2, by adjusting the appropriate flow rate by the flow control valve 21, is supplied and mixed with the fuel flowing through the circulation pipe 10 from the inlet pipe 11. In the hydrogen gas supply device 2, the hydrogen gas cylinder is desirable in terms of the hydrogen gas consumption, facility cost, maintenance, etc., but is not limited to this, and is not limited thereto, organic hydrogen, carbon-based material raw material, hydrogen storage alloy, porous metal Hydrogen storage means using other solid hydrogen storage materials such as organic structures, amides, borohydrides, and alanates may be used, and further, a hydrogen generator by electrolysis may be used.

  The fuel tank 1 is an open type container whose upper side is open to the atmosphere, and stores a predetermined amount of fossil fuel, for example, A heavy oil and kerosene. The fossil fuel to the fuel tank 1 may be supplied from a drum or the like as appropriate by the operator looking at the fuel level in the tank, and another fossil fuel tank 6 is installed as shown in FIG. Alternatively, the fuel level in the fuel tank 1 may be supplied by the pump 22 from the fossil fuel tank 6 so that the fuel level in the fuel tank 1 becomes constant by a float valve or the like.

The hydrogen dissolving apparatus 3 has a spiral flow forming part, a gas-liquid reaction part, and an ultrasonic irradiation part, and fossil fuel mixed with hydrogen gas H ₂ is supplied from the inlet 3a thereof, and the spiral flow forming part In addition, shearing, stirring, and mixing are performed by the gas-liquid reaction unit, and vibration and pressure change action by ultrasonic waves are used in combination, so that hydrogen gas is continuously dissolved in the fossil fuel in a supersaturated state. The hydrogen dissolution apparatus 3 is based on the apparatus disclosed in Japanese Patent Application Laid-Open No. 2007-185576, and can efficiently dissolve hydrogen gas in fossil fuel. However, the present invention is not limited to this, and hydrogen gas can be dissolved in fossil fuel. Other methods such as jetting, cavitation method, and combinations thereof may be used.

  A supply line 26 communicates from the fuel tank 1 toward the burner 25 of the boiler B. The supply pipe 26 is led to the outlet of the burner 25 through a pump 27, a gate valve 29, a flow meter 30 and the like. In addition to the fuel, the burner 25 receives air and burns the fuel.

  Boiler B is a boiler for boiling water, and heat of the combustion chamber 33 produced by the burner 25 is efficiently exchanged for water in the spiral tube 35 and stored in the hot water storage tank 36. In addition, although the said boiler B has shown the object for boiling water, of course, the boiler for steam generation may be sufficient.

Next, the operation of the above-described apparatus will be described. The hydrogen-dissolved fuel manufacturing apparatus U1 stores a predetermined amount of fossil fuel (for example, A heavy oil) in the fuel tank 1. Then, in a state where the pump 9 is driven and the fuel is circulated through the circulation line 10, the flow rate adjustment valve 21 is opened to supply the hydrogen gas H ₂ into the line 10 at a predetermined flow rate. The melting device 3 is activated. As a result, the fuel in the circulation line 10 is cooled by the cooling device 12 so that the hydrogen gas can be easily dissolved, and the fossil fuel mixed with the hydrogen gas H ₂ is sheared, While being stirred, ultrasonic vibration is applied, and hydrogen gas H ₂ is dissolved in the fossil fuel in a saturated state. A part of the hydrogen gas H ₂ is microbubbles, also floating in the liquid phase becomes nanobubbles.

The operation of dissolving the hydrogen gas through the circulation line 10 is performed a plurality of times, and a predetermined amount [for example, 10 to 20%] of hydrogen gas H ₂ is dissolved in the fossil fuel in the fuel tank 1. The hydrogen gas H ₂ is dissolved almost uniformly in the fossil fuel in the fuel tank 1 and the pump 27 is driven and the gate valve 29 is opened while being as fresh as possible (a state in which the hydrogen gas is not diffused into the atmosphere). Then, the hydrogen-dissolved fuel in the fuel tank 1 is supplied to the burner 25 and burned.

  When the hydrogen-dissolved fuel is combusted, hydrogen gas is combusted first, and fossil fuel evaporation is accelerated by the heat. Even if the amount of heat of hydrogen gas is not large, it is uniformly dissolved in the fossil fuel, and compared with the supply of hydrogen gas from the outside, the evaporation of fossil fuel is promoted over its entire range, and the combustion of fossil fuel Raise the flame temperature slightly as you speed up. The effect of this slight combustion acceleration and the increase in flame temperature is propagated to the combustion of the subsequent fuel, which further changes the evaporation and combustion state of the subsequent fuel, and this effect is further supplied to the continuous combustion field. Cyclic influence on fuel combustion. As a result, even if the amount of hydrogen gas dissolved in the fossil fuel is small, the cyclic phenomenon is continuously maintained in a steady state, and combustion is maintained well. That is, combustion at a high temperature can be performed with a short flame length, and generation of soot can be prevented by complete combustion.

In the apparatus shown in FIG. 1, since the upper part of the fuel tank 1 is opened, the hydrogen gas dissolved in the fossil fuel is dissipated into the atmosphere over time. Thus, as much as possible out of the fresh, for example, while performing the dissolution work hydrogen circulation pipe 10, it is preferable to burn the fuel from the supply line 26 is supplied to the burner 25, but still, the hydrogen gas H _2, the fuel Dissipated from above the tank 1. Therefore, as shown by a chain line in FIG. 1, a hydrogen gas accumulating member 37 is disposed so as to cover the upper side of the fuel tank 1, and the hydrogen gas H ₂ collected by the accumulating member 37 is burned through the conduit 39. The accumulated hydrogen gas H ₂ is combusted together with the hydrogen-dissolved fuel.

  Thereby, the hydrogen gas to be diffused can be used effectively, and safety can be improved. It is desirable that a hydrogen gas storage means for storing hydrogen gas and a valve capable of shutting off the supply be interposed in the hydrogen gas integrated supply path.

  In the fuel tank 1 shown in FIG. 1, the amount of dissolved hydrogen is increased by the circulation line 10 and used in the fresh to obtain a predetermined amount of dissolved hydrogen. However, more hydrogen gas can be dissolved. It may be desirable.

Figure 2 is a form of embodiment for the, by the fuel tank and the pressure vessel 1 _1, to enhance the hydrogen dissolution amount. Fuel tank _{1 1} consisting of the pressure vessel is maintained at a predetermined pressure (e.g. 2.5~4.5kg / cm ²⁾ by regulating pressure relief valve 39. The fossil fuel in the fuel tank 1 held in the pressure state can dissolve and hold more hydrogen gas H ₂ .

The hydrogen-dissolved fuel production apparatus U2 can also be arranged in a single line 40. At one end of the pipe line 40, a tank 6 for storing the fossil fuel is connected via a flow regulating valve 41, and the tube path 40 introducing pipe 11 ₁ from the hydrogen cylinder 2 communicates. Furthermore, the downstream side of the conduit 40, sequentially, the check valve 43, the fuel cooling device 12 and the hydrogen dissolving device 3 is interposed, and the other end is connected to the fuel tank 1 _1.

Therefore, by driving the pump 42, the fossil fuel in the tank 6 and the hydrogen gas in the cylinder 2 are appropriately adjusted by the flow rate adjusting valves 41 and 21, respectively, and supplied to the conduit 40, and the check valve 43 and the cooling device 12 are turned on. To the hydrogen dissolution apparatus 3. Then, the hydrogen dissolving device 3, with its discharge side is pressurized by the internal pressure of the fuel tank 1 ₁ to be communicated with, shearing, stirring, is excited by the ultrasonic while being mixed, the more hydrogen Dissolved. The fossil fuel containing dissolved hydrogen is kept at the high hydrogen dissolved state in the fuel tank 1 ₁ of the high pressure. Incidentally, the supply of fossil fuels and hydrogen gas from line 40 pump 42 is stopped and is stopped by the check valve 43 is interposed, the fuel tank 1 ₁ is held at a predetermined pressure.

Fuel in the fuel tank 1 ₁ consisting of the pressure vessel, the communication between the pump 27 and the partition valve 29 is burned by being supplied to the burner 25 via the supply line 26. The use of the fuel in the fuel tank 1 _1, the level of fuel in the tank varies, to maintain the pressure even in the tank by the level change to a predetermined pressure, in this embodiment, the tank 1 ₁ In addition, the accumulator 42 and the air pump 43 communicate with each other. Thus, the fuel tank 1 _1, also the fuel level is lowered by the use, is maintained at a predetermined pressure by the accumulator 42. Note that the accumulator 42, the air pump 43, and the like can be eliminated by adjusting the supply amount from the fossil fuel tank 6 so as to keep the fuel level constant.

  Moreover, although this manufacturing apparatus U2 demonstrated using the line-shaped pipe line 40, you may use the circulation pipe line 10 similarly to what is shown in FIG.

In this embodiment, the fuel tank 1 ₁ 'provided, the circulation line 10' circulation line 10, the gate valve 20, interposed pump 9, between the cooling device 12 and the check valve 43 To join the conduit 40. In addition, a direction switching valve 41 is interposed in the pipe line from the hydrogen gas cylinder 2, and the introduction pipe 11 ₁ directly communicating with the one-line pipe line 40 by the switching valve 41 and the introduction pipe 11 leading to the circulation pipe line 10 ′. Switch to ₂ .

When using a circulation line 10 ', to drive the pump 9 circulates the fuel in the fuel tank 1 ₁ consisting of the pressure vessel, mixed with hydrogen gas from the inlet pipe 11 _2, and further cooled by the cooling device 12 Hydrogen is dissolved by the hydrogen dissolving device 3. Thus, fuel in the fuel tank 1 _1, by a predetermined number of times circulation, further more hydrogen gas can be dissolved in fossil fuels. At this time, the pressure liquid in the circulation pipe 10 ′ does not flow to the fossil fuel tank 6 side through the pipe 40 by the check valve 43. Fuel system and the fuel tank 1 ₁ similarly shown in FIG. 1, repeated a predetermined number of times by the circulation pipe 10 ', the hydrogen gas is dissolved by the hydrogen dissolving device 3, more hydrogen gas H ₂ to fossil fuels Can be dissolved.

  Even in the manufacturing apparatuses U1 and U2 shown in FIG. 1 and FIG. 2, it is possible to sell the hydrogen-dissolved fuel itself by measuring the amount used by the flow meter 30 of the circulation line 26, It is necessary to install the fuel production apparatuses U1 and U2 near the boiler. FIG. 3 shows a fuel tank in which a hydrogen-dissolved fuel is produced by the production apparatus shown in FIG. 1 or 2 and the fuel is transported to be used for another boiler.

Fuel tank 1 ₃ shown in FIG. 3 consists of a pressure vessel, variable relief valve 39, pressure gauge 45, a pressure injection valve 46 and the fuel quantity cage 47 is provided in the top wall. On the other hand, the lower portion of the tank 1 _3, inlet pipe connecting portion 49 and also outlet pipe connecting part 50 of the cock of the cock is provided.

The fuel tank 1 ₃ is hydrogen dissolved fuel produced by the hydrogen dissolved manufacturing device U1, U2 is fed directly from the discharge port of the supply pipe 26 or from the hydrogen dissolving device 3. At this time, the pressure injection valve 46 is opened, and air in the space above the tank is released. After the hydrogen dissolved fuel filled in the fuel tank 1 _3, with the cock closed the introduction coupling portion 49, the hydrogen or air is pressed through a hydrogen or pressure injection valve 46 and dissipated from the fuel, the fuel tank 1 ₃ is held to a predetermined pressure.

In this state, the fuel tank 1 ₃ is transported to a predetermined boiler facility, after being placed therein, the supply pipe of the boiler to the outlet pipe connecting part 50 of the fuel tank 1 ₃ is connected, the The cock is opened. Thus, the hydrogen dissolution fuel in the fuel tank 1 in ₃ is burned is supplied to the burner of the boiler.

The fuel level in the tank 1 in ₃ by the use is lowered, by press-fitting of the hydrogen or air from dissipating the hydrogen gas or pressure injection valve 46 from the fuel, the tank 1 ₃ is maintained at a predetermined pressure. Moreover, smooth variable relief valve 39 is, when the tank 1 ₃ becomes a negative pressure by using a material having a check valve function to intake air pressure, by reduction of the fuel level due to use, the supply of fuel You may be able to.

By using this fuel tank 1 _3, even equipment without boiler hydrogen dissolved fuel production apparatus, can easily use the hydrogen dissolution fuel and tank are made from the pressure vessel, and imparting a predetermined pressure Therefore, a predetermined hydrogen dissolution amount can always be maintained. This embodiment satisfies the fuel tank 1 ₃ itself fuel is transported, have been described as being collected and refilled after use, this fuel tank 1 ₃ leave installed in the boiler facilities, tank truck using tanks carrying only equal, to the fuel tank 1 ₃ in the field may be filled with hydrogen dissolved fuel.

  In the hydrogen-dissolved fuel production apparatuses U1 and U2 described above, the cooling device 12 may not be provided and may be applied to other boilers such as a steam generating boiler.

  FIG. 4 shows the experimental results of burning the above-described hydrogen-dissolved fuel by applying it to a boiler. The amount of water in the hot water storage tank is the same, and the time until the water in the tank reaches 50 [° C.] from 50 [° C.] is measured. Fossil fuel uses heavy oil A, hydrogen gas is supplied from a hydrogen cylinder to a fuel tank, and fuel in which hydrogen is dissolved is supplied to a burner having a capacity of 50 [l / h] and air is supplied to 6.0 [l / h]. min] and combusted.

When hydrogen gas is not injected into A heavy oil and burned by a conventional method, the temperature rise time is about 10:23 [min]. When hydrogen gas is supplied at 0.4 [l / min], when the pressure in the fuel tank is 0 (atmospheric pressure), it is about 10.20 [min], which is not very effective and the amount of dissolved hydrogen is insufficient. It seems that hydrogen gas did not reach the burner. The fuel tank internal pressure as 2.0 [kg / cm ^2], the hydrogen gas supply amount 0.1 [l / min], 0.2 [l / min], 0.4 [l / min], 0.6 Although it increased to [l / min], the temperature rise time did not change much, and when the tank internal pressure was 2.0 [kg / cm ² ], even if the hydrogen gas supply amount was increased, the amount of dissolution was limited. It is guessed.

When the tank internal pressure is 3.0 [kg / cm ² ] and the hydrogen gas supply amount is increased to 0.1 [l / min], 0.2 [l / min], 0.4 [l / min], 0 The heating time was shortened most at 0.2 [l / min], and the heating time was rather long at 0.4 [l / min]. When the tank internal pressure is 4.0 [kg / cm ² ] and the hydrogen gas supply amount is 0.2 [l / min], the best time at the tank internal pressure of 3.0 [kg / cm ² ] is obtained. And almost the same result.

Therefore, the combustion with the hydrogen gas-dissolved fuel described above is the best efficiency when the hydrogen gas supply amount is around 0.2 [l / min], and the hydrogen dissolution amount is 0.2 [l / min]. it is considered the tank internal pressure is required extent 3.0 [kg / cm ^2].

As can be seen from FIG. 4, if the tank internal pressure is larger than 2.5 [kg / cm ² ], a practically effective hydrogen dissolution amount can be obtained. If the hydrogen amount is 0.2 [l / min], Since the internal pressures 3 [kg / cm ² ] and 4 [kg / cm ² ] are substantially the same, even if the tank internal pressure is larger than 4.5 [kg / cm ² ], the hydrogen dissolution amount does not change so much, rather the pressure vessel Therefore, the tank internal pressure may be 2.5 to 4.5 [kg / cm ² ]. The hydrogen gas supply amount depends on the tank internal pressure, but the effect at the M line portion in FIG. 4 is practically recognized and may be 0.1 to 0.4 [l / min], particularly 0.1. -0.3 [l / min] and 0.15-0.3 [l / min] are preferable.

1, 1 ₁ , 1 ₃ Fuel tank 2 Hydrogen gas supply device (hydrogen cylinder)
3 Hydrogen Dissolving Device 10, 10 ′ Circulation Line 11 Hydrogen Introducing Pipe 12 Fuel Cooling Device 25 Burner

Claims (5)

Comprising fossil fuel and hydrogen dissolved in the fossil fuel,
A rise in flame temperature based on the combustion of the hydrogen dissolved in the fossil fuel, which is used for continuous fuel in the burner, cyclically affects the subsequent combustion of the fuel;
A hydrogen-dissolved fuel characterized by that. The hydrogen gas is dissolved in a volume ratio of 1/10 to 1/5 with respect to the fossil fuel.
The hydrogen-dissolved fuel according to claim 1. Hydrogen was dissolved in a supersaturated state in a fossil fuel by a hydrogen dissolving device that continuously mixes and dissolves hydrogen gas into fossil fuel.
The hydrogen-dissolved fuel according to claim 1 or 2. A hydrogen introduction pipe for introducing hydrogen gas from a hydrogen gas supply device and the hydrogen dissolution apparatus are interposed in a circulation line through which the fuel from the fuel tank flows out and flows in again;
By circulating the fuel in the fuel tank to the circulation line, a fuel in which hydrogen is dissolved in a supersaturated state in a fossil fuel is supplied from the fuel tank to the burner in a fresh state.
The hydrogen-dissolved fuel according to claim 3. The fuel in which the hydrogen is dissolved in the fossil fuel is put into a fuel tank whose internal pressure is maintained at 2.5 to 4.5 [kg / cm ² ], and the fuel is burned with a capacity of 50 [l / h]. In contrast, hydrogen gas is supplied at a rate of 0.1 to 0.4 [l / min].
The hydrogen-dissolved fuel according to any one of claims 1 to 4.

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