JPH11270794A - Hydrocarbon gas storage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrocarbon gas storage system that is capable of offering stable adsorption of hydrocarbon gas by suppressing water condensation on the surface of an adsorbent. SOLUTION: A storage tank 10, which accommodates therein an adsorbent 12, is subjected to depressurization by a vacuum pump and then fed with steam by a water feed tank 14 as well as hydrocarbon gas by a hydrocarbon gas feed line. During this control, another pump 16 circulates part of the gas led into the storage tank 10 to the tank inlet side. The gas flow to the adsorbent 12 prevents water condensation on the surface thereof. In the circulating line, a separator 18 is interposed to remove moisture contents contained in the gas, which also avoids water condensation on the surface of the adsorbent 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a hydrocarbon gas storage device for storing hydrocarbon gas used for an internal combustion engine or an energy source of a fuel cell.

[0002]

2. Description of the Related Art Hydrocarbon gas is conventionally stored at a higher pressure,
There are various storage methods such as cooling and liquefaction, and particularly in the case of an internal combustion engine that is a power source of a vehicle or the like, storage by a high-pressure tank is common. However, in high-pressure storage, there are pressure restrictions due to legal regulations, and a sufficient storage amount cannot be secured.

[0003] For this reason, a storage method has been proposed in recent years in which activated carbon is adsorbed together with a host compound. An example of such a storage method is disclosed in JP-A-9-210295. In this conventional technique, a porous material having a large specific surface area is used as an adsorbent, and a host compound such as water is coexisted to form an inclusion compound of a hydrocarbon gas such as methane. Is adsorbed and stored in an adsorbent.

[0004]

However, in the above prior art, water serving as a host when the hydrocarbon gas is adsorbed on the adsorbent may condense on the surface of the adsorbent. When such water condensation occurs on the surface of the adsorbent, there is a problem in that contact of the hydrocarbon gas with the adsorbent is hindered and adsorption of the hydrocarbon gas becomes difficult.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a hydrocarbon gas storage device capable of suppressing water condensation on the surface of an adsorbent and stably adsorbing a hydrocarbon gas. Is to provide.

[0006]

In order to achieve the above object, the present invention provides a storage device for a hydrocarbon gas in which water is previously adsorbed on an adsorbent contained in a storage tank and then hydrocarbon gas is adsorbed. Wherein the storage tank is arranged in the middle of the gas flow path.

In the above-mentioned hydrocarbon gas storage device, the gas flowing out of the storage tank is returned to the inlet side of the storage tank.

In the above-mentioned hydrocarbon gas storage device, the gas flowing out of the storage tank is cooled and then returned to the inlet side of the storage tank.

In the above-mentioned hydrocarbon gas storage device, the gas flowing out of the storage tank is separated into water and then returned to the inlet side of the storage tank.

[0010] In the above-mentioned storage device for hydrocarbon gas, the humidity in the storage tank is detected, and when the humidity is detected to be equal to or higher than a predetermined value, reflux is performed.

[0011] Further, a hydrocarbon gas storage device for adsorbing hydrocarbon gas after adsorbing water in advance to an adsorbent housed in the storage tank, wherein the storage tank is provided with stirring means inside. And

[0012] Further, there is provided a hydrocarbon gas storage device in which water is previously adsorbed on an adsorbent housed in a storage tank and then a hydrocarbon gas is adsorbed. A gas-permeable container filled with a material is provided, and hydrocarbon gas is introduced from a lower part of the gas-permeable container.

[0013] Further, the present invention is a hydrocarbon gas storage device for adsorbing hydrocarbon gas after adsorbing water in advance to an adsorbent housed in the storage tank, wherein the storage tank is provided with vibration imparting means. I do.

Further, there is provided a hydrocarbon gas storage device for adsorbing water before adsorbing water to an adsorbent housed in a storage tank, wherein the storage tank is mounted on a vehicle and has a gas supply port and a gas supply port. A gas outlet, and the storage device for the hydrocarbon gas is connected to a gas supply port of the storage tank, and a gas supply means for supplying gas; and a gas outlet of the storage tank, and A gas supply facility having gas recirculation means for recirculating the discharged gas to a gas supply port, and the storage tank.

A storage tank for hydrocarbon gas, which contains an adsorbent for adsorbing water and then adsorbing hydrocarbon gas, has a gas supply port and a gas discharge port, and is mounted on a vehicle. It is characterized by having.

A gas supply system for supplying gas to the storage tank is connected to a gas supply port of the storage tank and connected to gas supply means for supplying gas and a gas discharge port of the storage tank. Gas recirculation means for recirculating the discharged gas to the gas supply port.

A hydrocarbon gas storage device for adsorbing hydrocarbon gas after adsorbing water in advance to an adsorbent housed in a storage tank, wherein the adsorbent has a honeycomb structure having a higher thermal conductivity than the adsorbent. It is characterized in that it is filled in the cavity of the body.

Further, in the hydrocarbon gas storage device, the honeycomb structure is made of metal.

Further, in the hydrocarbon gas storage device, electrodes are provided at one end and the other end in the longitudinal direction of the honeycomb structure.

Further, in the hydrocarbon gas storage device, three or more electrodes including one end and the other end in the longitudinal direction of the honeycomb structure are provided.

Further, in the hydrocarbon gas storage device, when desorbing and releasing the hydrocarbon gas, heating is performed from the honeycomb structure on the outlet side.

Further, there is provided a hydrocarbon gas storage device for adsorbing a hydrocarbon gas after adsorbing water in advance to an adsorbent contained in the storage tank, wherein the inside of the storage tank is separated by a partition. A metal layered structure is accommodated,
The cavity between the partition walls is filled with an adsorbent.

Further, in the above hydrocarbon gas storage device, each partition is provided with an electrode.

Further, in the hydrocarbon gas storage device, a predetermined condition for forming a hydrate forming region is detected,
It is characterized in that heating is performed.

Further, there is provided a storage device for a hydrocarbon gas in which water is previously adsorbed on an adsorbent contained in the storage tank and then the hydrocarbon gas is adsorbed. It is characterized in that at least a part is heated.

[0026] Further, the present invention is a hydrocarbon gas storage device in which water is adsorbed in advance to an adsorbent contained in a storage tank, and then a hydrocarbon gas is adsorbed. It is 30 to 300 cc / min · g.

[0027]

Embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

Embodiment 1 FIG. 1 is a configuration diagram of a first embodiment of a hydrocarbon gas storage device according to the present invention.
In FIG. 1, a storage tank 10 contains an adsorbent 12 for adsorbing and storing a hydrocarbon gas. As the adsorbent 12, for example, activated carbon is suitable. In this embodiment, the adsorbent 12 adsorbs water in advance and then adsorbs the hydrocarbon gas.

As shown in FIG. 1, a water supply tank 14 is provided on the inlet side of the storage tank 10, and supplies water in the form of steam from the water supply tank 14 to the storage tank 10. As a result, water is adsorbed on the adsorbent 12. Also,
The storage tank 10 is arranged in the middle of the gas flow path. This flow path is provided with a pump 16 for refluxing the gas in the storage tank 10 to the inlet side and a separator 18 for separating water in the gas. With such a configuration, the steam or the hydrocarbon gas can be adsorbed while the gas is circulating in the storage tank 10.
As a result, steam or hydrocarbon gas is stored in the storage tank 1
During the filling of the adsorbent 12 with zero, the adsorbent 12 is always flowing.

Generally, when water vapor or hydrocarbon gas is adsorbed on the adsorbent 12, heat of adsorption is generated, and the water adsorbed on the adsorbent 12 is partially evaporated. The water vapor or water supply tank 14 evaporated from the adsorbent 12
The water vapor supplied from moves to a low-temperature portion such as another adsorbent 12 and condenses there. Once condensation occurs on the surface of the adsorbent 12 and water droplets form, they become nuclei and water vapor further condenses there, and the condensation on the surface of the adsorbent 12 expands. This phenomenon is particularly remarkable when there is no gas flow on the surface of the adsorbent 12. On the other hand, if the storage tank 10 is arranged in the middle of the gas flow path as in the present embodiment and the gas is adsorbed and filled while the gas is always passed through the storage tank 10, the surface of the adsorbent 12 is always The gas is moving. Therefore, the adsorbent 12
Water condensation on the surface can be suppressed.

The procedure for storing the hydrocarbon gas in the storage tank 10 is as follows. First, open the valves a and c,
With the other valves closed, the pressure inside the storage tank 10 is reduced by a vacuum pump (not shown). Next, valves a, b, d,
e and f are opened, valves c and g are closed, and the water supply tank 1 is opened.
From 4, water in the form of steam is supplied to the storage tank 10. In this case, it is also preferable to drive the pump 16 to circulate the steam supplied to the storage tank 10. In this case,
The temperature of the separator 18 is set to the same temperature as the temperature of the steam supplied to the storage tank 10. This is because when the temperature of the water in the separator 18 becomes higher than the temperature of the steam supplied from the water supply tank 14, the temperature of the adsorbent 12 becomes substantially equal to the temperature of the steam supplied from the water supply tank 14. This is because water may condense on the surface of the adsorbent 12. When supplying steam, it is not always necessary to circulate the gas.
The determination is made in consideration of the power loss of the pump 16 and the like.

Next, the valves c and f are closed, and the valves a and
With b, d, e, and g open, a hydrocarbon gas such as methane is supplied to the storage tank 10. In this case, the pump 16 is started, and the hydrocarbon gas supplied to the storage tank 10 is circulated. When hydrocarbon gas is introduced into the storage tank 10, heat of adsorption is generated in the adsorbent 12, so that the temperature of the adsorbent 12 rises and a part of the adsorbed water evaporates. This steam is entrained in the hydrocarbon gas extracted from the storage tank 10 by the pump 16, so that the separator 18
A part of it is condensed by passing through water.
In this way, the hydrocarbon gas from which a part of the accompanying steam is condensed and removed is returned to the inlet side of the storage tank 10 and returned to the storage tank 10. As described above, in the present embodiment, since the water vapor entrained by the hydrocarbon gas is condensed in the separator 18, water condensation on the surface of the adsorbent 12 can also be suppressed in this regard.

In the example shown in FIG. 1, the gas flowing out of the storage tank 10 is returned to the inlet side of the storage tank 10 by the pump 16 again. The configuration is not limited to this as long as hydrogen gas can move.

FIG. 2 shows a modification of the first embodiment of the hydrocarbon gas storage device according to the present invention. In FIG. 2, the gas taken out of the storage tank 10 is cooled by the heat exchanger 20 and returned to the inlet side of the storage tank 10 again. The cooling water is circulated between the heat exchanger 20 and the cooling water tank 22 by the pump 24. Thereby, the heat of adsorption generated by the adsorption of the hydrocarbon gas to the adsorbent 12 in the storage tank 10 can be removed. Therefore, the temperature rise in the storage tank 10 can be reduced, and the temperature in the storage tank 10 can be made uniform. Since the amount of the hydrocarbon gas adsorbed on the adsorbent 12 depends on the temperature, variations in the amount of adsorption can be reduced by making the temperature in the storage tank 10 uniform. In addition, the amount of water adsorbed on the adsorbent 12 greatly affects the amount of hydrocarbon gas adsorbed, but the amount of water adsorbed can also be made uniform, so that the hydrocarbon gas is adsorbed efficiently. As a result, the amount of adsorption of the hydrocarbon gas can be improved. Further, since the temperature in the storage tank 10 is made uniform, a local rise in temperature is suppressed, and the phenomenon that water evaporated in the high-temperature portion moves to the low-temperature portion and condenses can be suppressed. Water can be greatly suppressed.

Further, as shown in FIG.
Since 0 is provided outside the storage tank 10, cooling can be performed without reducing the effective volume in the storage tank 10.

In order to investigate the cooling effect of the heat exchanger 20, when 1 kg of granular coconut shell activated carbon is used as the adsorbent 12 and water vapor and hydrocarbon gas are adsorbed on it,
The temperature difference was examined depending on the presence or absence of the heat exchanger 20. As a result, when steam is introduced, the heat exchanger 20
In the case where the heat exchanger 20 was not used, the temperature rise was 35 ° C., whereas when the heat exchanger 20 was used, the temperature rise was only 10 ° C. The cooling water temperature in this case was 25 ° C. Also,
When methane was used as the hydrocarbon gas and the methane was adsorbed, the temperature rose to 27 ° C. when the heat exchanger 20 was not provided, whereas when the heat exchanger 20 was used, the temperature increased by 8 ° C.
C stayed at the rise.

As described above, it has been found that the heat exchanger 20 according to the present embodiment has a large effect of suppressing the temperature rise of the adsorbent 12.

In the example shown in FIGS. 1 and 2, it is also preferable to increase the output of the recirculation pump 16 at the initial stage of filling with steam or hydrocarbon gas to increase the flow rate of the gas passing through the storage tank 10. It is. This is shown in FIG.
As shown in (2), the heat of adsorption generally generated by the adsorption to the adsorbent 12 becomes the largest in the initial stage of the adsorption. In this initial stage of filling, the output of the pump 16 is reduced to a normal value of 2 to 10.
By increasing the flow rate by about twice and increasing the flow rate, the amount of water or hydrocarbon gas adsorbed on the adsorbent 12 can be increased. For this reason, the latent heat deprived by the desorption increases, but the adsorption speed to the adsorbent 12 increases as the temperature decreases, so that the gas adsorption speed can be increased.

For example, when water vapor is adsorbed by the adsorbent 12, the temperature usually rises up to about 10 ° C. in the first 10 minutes, whereas when the pump output is increased by a factor of 5, the temperature rises up to 7 ° C. Can be suppressed.

It is also preferable that a humidity sensor is provided in the storage tank 10 so that the circulation pump 16 is started only when the detected humidity becomes a predetermined value or more. Accordingly, the power of the pump 16 can be saved, and the pump 16 can be started only when the humidity in the tank 10 increases and water easily condenses on the surface of the adsorbent 12, thereby preventing the condensation. .

Embodiment 2 FIG. In the example shown in FIG.
The rise in the temperature of the storage tank 10
And when the storage tank 10 is exposed to direct sunlight. However, when the hydrocarbon gas storage device according to the present invention shown in FIG. 2 is applied to an automobile, it is unlikely that the normal storage tank 10 is directly irradiated with sunlight except for a special use such as a forklift. Very small. Therefore, the possibility that the temperature of the storage tank 10 rises except when the gas is filled with the steam or the hydrocarbon gas is very small.

As described above, the pump 16, the heat exchanger 20, the cooling water tank 22, the pump 24 and the like shown in FIG. 2 are used only at the time of gas filling. For this reason,
On the vehicle side, only the storage tank 10, a gas supply port for supplying gas to the storage tank 10, and a gas discharge port for discharging gas may be provided. In this case, the valve a corresponds to the gas supply port according to the present invention, and the valve b corresponds to the gas discharge port.

The pump 16 and the heat exchanger 2 described above
The cooling water tank 22, the pump 24, and the like are connected to a valve a serving as a gas supply port and a valve b serving as a gas discharge port, and constitute a gas recirculation unit according to the present invention. Further, a water supply tank 14 connected to a valve a serving as a gas supply port, a valve c,
e, f, and g constitute the gas supply means according to the present invention. These gas supply means and gas recirculation means can be installed outside the vehicle. The gas supply unit according to the present invention is constituted by the gas supply unit and the gas circulation unit described above.

The above gas supply equipment may be installed, for example, on the fuel station side. With such a configuration,
Only the compact and simple equipment needs to be installed on the vehicle side. Further, since it is not necessary to supply power energy for driving the circulation pump 16 from the battery of the vehicle, the battery can be prevented from being deteriorated early.

Embodiment 3 FIG. FIG. 4 shows a configuration diagram of a third embodiment of the hydrocarbon gas storage device according to the present invention.
In FIG. 4, when introducing steam and hydrocarbon gas into the storage tank 10, a part of the introduced gas is flowed into the recovery tank 26. Hydrocarbon gas storage tank 1
When the gas is introduced to zero, the gas is introduced while controlling the pressure in the storage tank 10 by the regulator 28.

With this configuration, similarly to the embodiment shown in FIGS. 1 and 2, the adsorption of water vapor or hydrocarbon gas on the adsorbent 12 stored in the storage tank 10 is performed on the adsorbent 12. Can be performed while flowing gas.
For this reason, as described above, water condensation on the surface of the adsorbent 12 can be suppressed. Further, since the pressure of the storage tank 10 is controlled by the regulator 28 when the hydrocarbon gas is introduced, the filling method according to the present embodiment can be applied even when the pressure of the storage tank 10 needs to be increased. It is.

Embodiment 4 FIG. 5 shows an example of a storage tank 10 used in a hydrocarbon gas storage device according to a fourth embodiment of the present invention. In FIG. 5, the storage tank 10
Is composed of an outer case 30 that does not rotate, and a rotating drum 32 rotatably housed in the outer case 30.
Although the outer case 30 and the rotating drum 32 are cylindrical, the shapes are not limited to these as long as the rotating drum 32 can rotate.

At both ends in the axial direction of the rotary drum 32, porous plates 34 are installed, and the adsorbent 12 is accommodated therein. The capacity of the adsorbent 12 is set at 10
The filling amount is not about 0% but about 80 to 90%. Therefore, when the rotating drum 32 rotates, the adsorbent 12 contained therein is in a flowable state. Note that the outer case 30 is preferably a pressure-resistant container in order to enable high-pressure filling with hydrocarbon gas.

The rotating drum 32 is connected to the motor 3 via a shaft 36.
8 and is rotated by a motor 38 in the direction of arrow A shown in FIG. A portion of the shaft 36 passing through the wall of the outer case 30 is provided with a pressure-resistant seal 40 to prevent gas leakage. Further, a gas inlet 42 is provided in the outer case 30, and steam and hydrocarbon gas are introduced from the gas inlet 42.

With this configuration, when steam and hydrocarbon gas are introduced from the gas inlet 42, the motor 38
When the rotating drum 32 is rotated, the filling amount of the adsorbent 12 is not 100% as described above, so that the gas is adsorbed while the adsorbent 12 flows. Therefore, the same effect as in the case where the gas is adsorbed while flowing the gas to the adsorbent 12 can be obtained. Therefore, when water vapor and hydrocarbon gas are adsorbed by the adsorbent 12, condensation of water on the surface of the adsorbent 12 caused by the temperature distribution of the adsorbent 12 can be suppressed.

FIG. 6 shows the rotary drum 32 shown in FIG.
A cross-sectional view of the example is shown. In FIG. 6, the rotating drum 3
A blade 44 for stirring the adsorbent 12 is provided inside 2. The blades 44 allow the rotating drum 32
With the rotation, the effect of stirring the adsorbent 12 housed inside can be enhanced.

FIG. 7 shows the outer case 30 shown in FIG.
A cross-sectional view of a modified example is shown. 7, the rotating drum 32 is not housed in the outer case 30. Instead, a rotating body 46 is attached to a shaft 36 rotated by a motor 38. The rotating body 46 rotates in the outer case 30 with the rotation of the shaft 36, and stirs the adsorbent 12 housed therein. In addition, it is also preferable to attach fins 48 for heat exchange to the rotating body 46 as shown in FIG.

As shown in FIGS. 6 and 7, the adsorbent 12 contained in the storage tank 10 is agitated by the blades 44 or the rotating body 46 of the rotating drum 32. Occasionally, the gas and the adsorbent 12 move relatively to each other, so that the same effect as in the case of performing adsorption while flowing the gas to the adsorbent 12 as shown in FIG. 1 can be obtained. Note that the rotating drum 32 and the rotating body 46 constitute the stirring means according to the present invention.

Embodiment 5 FIG. FIG. 8 shows an example of a storage tank 10 used in Embodiment 5 of the hydrocarbon gas storage device according to the present invention. In FIG. 8, the storage tank 10
Are provided with a plurality of air permeable containers 50. In the example shown in FIG. 8, the air-permeable containers 50 are arranged in two stages in the direction of gravity (the vertical direction in the figure). This breathable container 50
The upper and lower walls in the direction of gravity are made of a material having air permeability, and gas can flow in this direction.

As shown in FIG. 8, a manifold 52 for passing gas is formed above and below the gas permeable container 50. A gas inlet pipe 54 is connected to a manifold 52 formed below the gas permeable container 50,
A gas outlet pipe 56 is connected to the manifold 52 formed above the gas permeable container 50.

In this embodiment, when water vapor or hydrocarbon gas is supplied from the gas inlet pipe 54, the gas flows in the gas permeable container 50 in the direction of the arrow in the figure and is discharged from the gas outlet pipe 56. In the present embodiment, the adsorbent 12 is accommodated in the air-permeable container 50 with a space left in the upper part in the direction of gravity. Therefore, when the gas is adsorbed by the adsorbent 12, the adsorbent 12
Can be caused to flow by the flow of gas. That is, each permeable container 50 functions similarly to the fluidized bed. As a result, the gas and the adsorbent 12 move relatively during the adsorption of the gas to the adsorbent 12, so that
The same effect as in the case of adsorption while flowing the gas shown in FIG. 1 can be obtained.

The gas passage length and the cross-sectional area of the gas permeable container 50 need to be set so that the adsorbent 12 can sufficiently flow depending on the flow rate of the gas to be adsorbed. For this reason, the gas passage length and cross-sectional area are determined based on the weight, shape, and the like of the adsorbent 12 used. For example, when powdered activated carbon Maxsorb manufactured by Kansai Thermochemical Co., Ltd. is used as the adsorbent 12, the cross-sectional area of the gas permeable container 50 is 3 cm ² , the gas passage length is 10 cm, and the gas permeable container 50
If the activated carbon was filled so that the height of the upper space was 0.5 to 1 cm, suitable fluidity could be obtained. Also, in the case of using catala granular coconut shell activated carbon as the activated carbon, the cross-sectional area of the breathable container 50 is set to 3 cm ² ,
The gas passage length should be within 1cm and the height of the head space should be 0.2
When it was set to 0.5 cm, good fluidity could be obtained.

Embodiment 6 FIG. In each of the embodiments described above, the adsorbent 12 and the gas to be adsorbed are relatively moved by a method such as flowing the adsorbent gas through the adsorbent 12 or stirring the adsorbent 12 using a stirring means. It is configured. As described above, as a means for relatively moving the adsorbent 12 and the adsorbed gas, a method of applying vibration to the storage tank 10 may be considered. As such a vibration applying means, for example, an ultrasonic vibration generator can be considered. The intensity of the generated ultrasonic vibration is desirably such that it can apply substantially uniform vibration to the adsorbent 12 accommodated in the storage tank 10. As a result of the experiment, when ultrasonic vibration is applied to the storage tank 10, when water vapor and hydrocarbon gas are adsorbed by the adsorbent 12, the effect of preventing condensation of water generated on the surface of the adsorbent 12 is sufficiently ensured. I found out.

Embodiment 7 FIG. FIG. 9 shows an example of a storage tank 10 used in Embodiment 9 of the hydrocarbon gas storage device according to the present invention. In FIG. 9, the storage tank 10
Has a honeycomb structure 58 for accommodating the adsorbent 12.
Is housed. This honeycomb structure 58 has the structure shown in FIG.
As shown in FIG. 2, a hollow portion having a hexagonal cross section is stacked in a honeycomb shape. The adsorbent 12 is accommodated in a hollow portion having a hexagonal cross section. A porous film 60 is disposed in front of and behind the honeycomb structure 58 to prevent the adsorbent 12 from scattering outside when gas is adsorbed and desorbed.

In general, the adsorbent 12 such as activated carbon has a low thermal conductivity, but is dispersed in the honeycomb structure 58 as shown in the present embodiment, and the honeycomb structure 58 is made of a material such as copper or aluminum. If the adsorbent 12 is made of a high metal, heating and cooling of the adsorbent 12 can be performed efficiently. That is,
Examples of the adsorbent 12 include granular, powdery, and fibrous materials such as activated carbon and FSM. As described above, the honeycomb structure 58 is made of a metal such as copper or aluminum having a higher thermal conductivity than these. You.

As shown in FIG. 10, the honeycomb structure 58 has a structure in which hollow portions having a hexagonal cross section are stacked in a honeycomb shape. The length of the longest part is 5
mm. In particular, it is desirable to set it to about 1 to 3 mm. If the d value is larger than 5 mm, a large temperature difference occurs between the hexagonal center portion and the wall of the adsorbent 12 contained therein.
When a temperature difference occurs in the adsorbent 12, the water adsorbed by the adsorbent 12 in the high-temperature portion may evaporate, move to the low-temperature portion, and condense on the surface of the adsorbent 12.

Further, it is desirable that the length l of the honeycomb structure 58 in the longitudinal direction be within 20 times the d value. When the length l in the longitudinal direction increases, the pressure in the storage tank 10 becomes particularly 0.3 × 10 ⁵ Pa to 0.5.
When the pressure rises to about × 10 ⁵ Pa, there is a problem that the water vapor or the hydrocarbon gas does not diffuse deep into the honeycomb structure 58 and the adsorption cannot be sufficiently performed.

As described above, the adsorbent 12 is accommodated in the honeycomb structure 58, and when the steam or the hydrocarbon gas is supplied from the gas inlet pipe 54 to the honeycomb structure 58 via the porous film 60. Here, the gas is adsorbed on the adsorbent 12. The surplus gas is discharged from the gas outlet pipe 56. Therefore, also in the present embodiment, when the gas is adsorbed by the adsorbent 12, the state in which the gas flows to the adsorbent 12 can be maintained. Thereby, the condensation of water on the surface of the adsorbent 12 can be suppressed.

The honeycomb structure 58 is connected to a cooling water / hot water supply pipe 62 for cooling and heating. The cooling water or hot water supplied by the cooling water / hot water supply pipe 62 flows around the honeycomb structure 58, exchanges heat with the honeycomb structure 58, and is discharged from the cooling water / hot water outlet pipe 64.

FIG. 11 shows an example in which the honeycomb structure 58 shown in FIG. 10 is housed in the storage tank 10 and heating and cooling are performed. In FIG. 11, the honeycomb structure 58 is housed in a cylindrical housing tube 66, and the housing tube 66 is housed in a honeycomb housing tube 68 having a hexagonal cross section. Therefore, a gap 70 is formed between the housing tube 66 and the honeycomb housing tube 68. Therefore, FIG.
The cooling water or hot water supplied from the cooling water / hot water supply pipe 62 shown in FIG. As described above, the honeycomb structure 58 includes the adsorbent 1
Since the heat conductivity is higher than that of the honeycomb structure 2, if cooling water or hot water flows in the gap 70, heat is transferred to the hexagonal wall of the honeycomb structure 58, and the adsorbent 12 contained therein is sufficiently heated or cooled. be able to.

When the above honeycomb structure 58 is adopted, when the honeycomb structure 58 is made of aluminum or copper and the wall thickness is about 0.1 to 0.3 mm, the honeycomb structure 58 The thermal conductivity of the whole 58 can secure about 10 W / ° C. · m. In this case, the volume occupied by the honeycomb structure 58 is about 2% of the whole, and a filling rate of the adsorbent 12 of about 98% can be secured.

For such a honeycomb structure 58,
When the cooling method as shown in FIG. 11 is used, the temperature of the adsorbent 12 at the center of the honeycomb structure 58 is higher than the maximum cooling water temperature when the hydrocarbon gas having a large heat of adsorption is adsorbed. It was confirmed that the temperature rose by 11 ° C. When a temperature difference occurs to this extent, the amount of adsorption of the hydrocarbon gas to the adsorbent 12 varies, which may result in a decrease in the amount of adsorption. Therefore, if the intercooler type heat exchanger 20 shown in FIG. 2 is used in combination with such a honeycomb structure 58, the cooling efficiency can be further increased. As a result of the experiment, the temperature of the adsorbent 12 at the central portion of the honeycomb structure 58 could be suppressed to a rise within 3 ° C. with respect to the cooling water temperature.

It is to be noted that condensation of water easily occurs on the surface of the adsorbent 12 particularly at the initial stage of water introduction and the initial stage of hydrocarbon gas introduction at the time of refilling. This is because, as shown in FIG. 3, a large amount of heat of adsorption is generated in the initial stage of introduction of water vapor or hydrocarbon gas, and a portion of the water adsorbed on the adsorbent 12 evaporates due to the heat of adsorption. It is thought that it moves to the part and condenses.

Therefore, it is desirable to increase the above-mentioned cooling capacity at the initial stage of the introduction of steam and hydrocarbon gas, which generate a large amount of heat of adsorption. That is, FIG.
When the method of flowing the cooling water through the gap 70 shown in FIG. 1 and the method using the heat exchanger 20 as the intercooler shown in FIG. 2 are used together, the cooling capacity becomes highest in the initial stage of the adsorption. It is better to drive like that. FIG.
2 indicates whether or not cooling water is supplied to the gap 70 and the cooling water is supplied to the heat exchanger 20 at the first and second cycles of adsorption and desorption of water vapor and hydrocarbon gas to the adsorbent 12 or at the time of refilling. It shows an example of a starting state of a pump 24 for circulating. 12, at the time of introducing steam in the first cycle, cooling water is not supplied to the gap 70, and only the pump 24 is activated. Also,
When the hydrocarbon gas is introduced, the cooling water is also supplied to the gap 70, but after the adsorption amount exceeds 30%, the supply of the cooling water to the gap 70 is stopped because the amount of generated heat of adsorption decreases. I do. On the other hand, in the second cycle and thereafter, the gap 70 is initially set at the time of steam introduction and hydrocarbon introduction.
The cooling water is supplied to the pump and the pump 24 is started. However, the supply of cooling water to the gap 70 is 30
It has stopped after the point of exceeding%. This is because the amount of heat of adsorption decreases as described above.

As described above, especially in the second and subsequent cycles, the cooling capacity of the system is increased at the initial stage of the introduction of steam and hydrocarbon gas, and the condensation of water on the surface of the adsorbent 12 is prevented. On the other hand, after the point in time when the amount of adsorption exceeds a certain level, the supply of cooling water to the gap 70 is stopped because the generation of heat of adsorption is reduced. According to such a method, the temperature of the adsorbent 12 can be made uniform, the condensation of water on the surface of the adsorbent 12 can be suppressed, and the energy for cooling water supply to the gap 70 can be reduced. Energy costs can be reduced by 30 to 40%.

FIG. 13 shows a modification of the honeycomb structure shown in FIG. In FIG. 13, the honeycomb structure 58 is made of metal, and has electrodes 72 on one end and the other end in the longitudinal direction. When a current is applied to the electrode 72, a current flows through the honeycomb structure 58 made of metal, thereby generating heat. For this reason, the adsorbent 12 in the honeycomb structure 58 can be rapidly heated, and the desorption of the hydrocarbon gas can be promoted.

The honeycomb structure 5 according to the present embodiment
8 has a shape suitable for being accommodated in a storage tank 10 which is generally cylindrical, since it can be extended in the longitudinal direction.

Embodiment 8 FIG. FIG. 14 shows an example of a honeycomb structure 58 used in Embodiment 8 of the hydrocarbon gas storage device according to the present invention. In FIG. 14, the honeycomb structure 58 is provided with a plurality of electrodes 72 at equal intervals in the longitudinal direction. In the example shown in FIG. 14, the electrodes 72 are provided at six places including both ends thereof. However, the present invention is not limited to this, and one end and the other end in the longitudinal direction of the honeycomb structure 58 are connected. It is sufficient that the electrodes 72 are provided at three or more positions including the electrodes 72.

In the example shown in FIG. 13 described in the seventh embodiment, since the electrodes 72 are provided at both ends of the honeycomb structure 58, the current always flows through the entire honeycomb structure 58, and the energy The cost is high. On the other hand, according to the configuration of the present embodiment, it is possible to flow a current only to a necessary part, and it is possible to reduce power consumption. For example, when the desorbed hydrocarbon gas is discharged from the right side of FIG.
During this time, an electric current is passed, and the hydrocarbon gas adsorbed during the current is desorbed. Next, a current is passed between D and F in the electrode 72, and the hydrocarbon gas adsorbed between D and E is desorbed. The reason why the honeycomb structure 58 is heated from the outlet side in the longitudinal direction to desorb the hydrocarbon gas is to prevent water from condensing on the surface of the adsorbent 12. That is, if the electrode 72 is energized between A and B farthest from the outlet, the hydrocarbon gas adsorbed between AB is desorbed, and this gas is discharged in the order of C → D → E → F. It passes through the honeycomb structure 58. At this time, since the electrodes 72 (C, D, E, F) near the outlet side are not energized, the temperature of the adsorbent 12 at this portion is low. This is because there is a high possibility that the water entrained in the hydrocarbon gas evaporated between the ABs will condense on the surface of the adsorbent 12 having a low temperature.

By implementing the above-described configuration and the energizing sequence of energizing from the electrode 72 on the outlet side, water condensation on the surface of the adsorbent 12 can be suppressed, and power consumption can be reduced. Can be.

Embodiment 9 FIG. 15 is a sectional view of a storage tank 10 used in a hydrocarbon gas storage device according to a ninth embodiment of the present invention. In FIG. 14 of the eighth embodiment, the electrodes 72 are arranged in the longitudinal direction of the honeycomb structure 58. However, in FIG. 15, the pipes A, B, and C in which the electrodes 72 are concentrically mounted inside the storage tank 10. Is arranged. Also, between each pipe A, B, C,
Reinforcing members 74 are bridged, and each pipe A, B, C
I support. Note that the pipes A, B, and C do not necessarily need to be arranged concentrically, and may be any partition wall that separates the inside of the storage tank 10. As described above, in the present embodiment, the metal layered structure that separates the inside of the storage tank 10 by the partition walls, that is, the pipes A, B, and C, is the storage tank 1.
0, and the space between the pipes is filled with the adsorbent 12.

With such a configuration, it is easy to make the temperature uniform in the longitudinal direction of the storage tank 10. For this reason, condensation of water on the surface of the adsorbent 12 can be suppressed. When the adsorbent 12 is heated to desorb the hydrocarbon gas, the pipes A, B, and C are energized in this order, and are sequentially desorbed from the outer peripheral portion of the storage tank 10, or vice versa. It is preferable that the pipes C, B, and A be energized in this order so that the hydrocarbon gas is sequentially desorbed from the innermost peripheral portion of the honeycomb structure 58. Thereby, similar to the embodiment shown in FIG.
Since the hydrocarbon gas can be desorbed without causing water condensation, the power consumption can be reduced.

Embodiment 10 FIG. It is known that, for example, when methane is used as a hydrocarbon gas, under specific temperature and pressure conditions, water and methane form methane hydrate and form sherbet-like crystals. When such methane hydrate is formed, the supply pipe for the hydrocarbon gas is clogged, and the volume expansion at the time of methane hydrate formation exerts a load on the storage tank 10 and the like, thereby adversely affecting the durability and the like. There is a problem. Therefore, when storing the hydrocarbon gas at a high pressure in the storage tank 10, a measure for suppressing the formation of methane hydrate is required.

FIG. 16 shows a region where methane hydrate is formed with respect to the temperature and pressure of methane gas and water. In FIG. 16, the above-mentioned methane hydrate is formed in a region above the straight line α. As shown in FIG. 16, the higher the pressure, the more methane hydrate is formed, and the higher the temperature, the more the formation of methane hydrate is suppressed. Therefore, when the hydrocarbon gas is desorbed from the adsorbent 12 in the storage tank 10, the temperature of the adsorbent 12 decreases, and methane hydrate is more easily formed. Further, even when the hydrocarbon gas is not desorbed, there is a possibility that the storage tank 10 may enter the methane hydrate formation region even when the storage tank 10 is left at an outside air temperature in winter or the like, for example.

For this reason, it is necessary to detect the temperature and pressure of the storage tank 10 and to heat the storage tank 10 when entering the methane hydrate formation region shown in FIG. As the heating method, a method using the heat exchanger 20 shown in FIG. 2, a method of flowing hot water through the gap 70 shown in FIG. 11, and a method of heating by energization shown in FIG. 13, FIG. 14, and FIG. And the like.

Embodiment 11 FIG. In the example of the storage tank 10 shown in FIG. 9, a porous film 60 is disposed on the inlet side and the outlet side of the honeycomb structure 58 in order to prevent the adsorbent 12 filled in the honeycomb structure 58 from scattering. The pore diameter of the porous membrane 60 needs to be smaller than the diameter of the adsorbent 12, but due to processing restrictions, the pore diameter is limited to about 10 μm. As described above, since the pore diameter of the porous membrane 60 needs to be very small, the water vapor adsorbed on the adsorbent 12 or desorbed from the adsorbent 12 when the hydrocarbon gas is desorbed from the adsorbent 12 is removed. May condense in the pores of the porous film 60. In order to prevent this, for example, it is conceivable to increase the pore diameter of the porous membrane 60 described above. However, it is necessary to increase the diameter of the adsorbent 12 accordingly. However, it is not advisable to increase the diameter of the adsorbent 12 because it is necessary to increase the amount of adsorption of the hydrocarbon gas.

A method in which the powder of the adsorbent 12 is solidified into pellets and used may be considered. However, since the pellets may be disintegrated into powder during use and scattered, the powder may be used as the porous film 60. In some cases may block the pores and promote water condensation.

Therefore, the porous film 60 is made of metal, an electrode is attached thereto, and an electric current is applied to the porous film 60 so that the porous film 60 is made of metal.
Is effective. In this case, the temperature may be about 5 ° C. higher than the passing gas. In addition, in the storage tank 10 shown in FIG.
Although there are two porous membranes 60, condensation is likely to occur particularly on the inlet side, and therefore the above-described countermeasures should be implemented at least on the porous membrane 60 on the inlet side.

As described above, the method of heating at least a part of the porous membrane 60 and the like constituting the storage tank 10 is effective in suppressing water condensation.

Embodiment 12 FIG. Experiments have shown that if hydrocarbon gas is rapidly introduced after adsorbing water vapor on the adsorbent 12 accommodated in the storage tank 10, water is easily condensed on the surface of the adsorbent 12. This is presumably because the heat of adsorption generated when the hydrocarbon gas is adsorbed on the adsorbent 12 evaporates the previously adsorbed water, and the water vapor moves to a low-temperature portion to cause condensation.

FIG. 17 shows the relationship between the blowing flow rate of hydrocarbon gas per unit weight of activated carbon in the storage tank 10 and the probability of causing water condensation. In FIG. 17, φ indicates the ratio of the actually adsorbed water to the maximum water adsorption amount of the adsorbent 12. As can be seen from FIG. 17, water condensation does not occur at any value of φ if the flow rate of the hydrocarbon gas is 30 to 300 cc / min · g. Note that this value corresponds to the adsorbent 12
Is the case where activated carbon is used, but the value will be different if the type of activated carbon used is changed or if another type of adsorbent such as FSM is used. Therefore, the optimum value according to the type of each adsorbent 12 may be measured in advance, and the blowing speed of the hydrocarbon gas may be maintained at a value smaller than the value.

The flow rate of the hydrocarbon gas is set to 30 to 30.
As a method of setting the pressure to 0 cc / min · g, for example, the pressure difference between the blowing pressure at the time of blowing the hydrocarbon gas and the pressure of the storage tank 10 is set to 0.03 to 1.0 atm (3.039 × 10 ^3).
１．０1.013 × 10 ⁵ Pa) or less. It is also conceivable to provide a buffer tank on the inlet side of the storage tank 10 and subsequently pass the buffer tank through a sintered body filter to suppress the blowing speed of the hydrocarbon gas by the throttle effect.

Embodiment 13 FIG. FIG. 18 shows a configuration example of Embodiment 13 of the hydrocarbon gas storage device according to the present invention. In FIG. 18, an internal heat exchanger 76 for heating the adsorbent 12 is provided in the storage tank 10. A hot water tank 78 is connected to the internal heat exchanger 76, and the hot water is circulated by the pump 24. Thereby, the adsorbent 12 in the storage tank 10 is
Can be heated to promote desorption of hydrocarbon gas.

Further, on the gas inlet side of the storage tank 10, an air feed pump 80 is provided with a valve h and a regulator 82.
Connected through. Air is blown into the storage tank 10 by the air feed pump 80 while the pressure is adjusted by the regulator 82. When the air is blown into the storage tank 10, the air is more easily adsorbed by the adsorbent 12 than the hydrocarbon gas such as methane, so that the hydrocarbon gas and the air are replaced, thereby promoting the desorption of the hydrocarbon gas. be able to. It is also preferable to blow steam instead of air. When steam is blown, the temperature of the adsorbent 12 in the storage tank 10 rises due to the heat of adsorption of steam, and the desorption of hydrocarbon gas can be promoted.

As described above, if the pump 24 is started to circulate the hot water from the hot water tank 78 to the internal heat exchanger 76, and the air is replaced with the adsorbent 12, the desorption of hydrocarbon gas can be achieved. Further promoted. Thus, the amount of hydrocarbon gas desorbed can be increased as compared with the case where only the inside of the storage tank 10 is heated by the internal heat exchanger 76.

The internal heat exchanger 76 controls the storage tank 10.
When the inside is heated, the pressure in the storage tank 10 increases. Therefore, while monitoring this pressure with the pressure gauge 84 and adjusting the pressure with the regulator 86, supplying the hydrocarbon gas from the valve b to the utilization system side while adjusting the pressure with the regulator 86. Become.

FIG. 19 shows a modification of the hydrocarbon gas storage device according to the present embodiment. In FIG. 19,
No heat exchanger is provided in the storage tank 10, but instead an air heater 88 is provided in the air supply line. This air heater has a pump 2 from a hot water tank 78.
4 supplies hot water and heats the air sent by the air feed pump 80. The heated air is blown into the storage tank 10 via the valve a.

With such a configuration, by blowing heated air into the storage tank 10, it is possible to simultaneously provide the air-replacement action and the heating action.
2 can promote the desorption of hydrocarbon gas.

In the examples of FIGS. 18 and 19 described above,
Since the configuration is such that air is blown into the storage tank 10, the amount of air blown is adjusted in accordance with the pressure in the tank detected by the pressure gauge 84, and the hydrocarbon gas discharged from the storage tank 10 is subjected to the adjustment. It is also possible to take out as a mixture gas in the combustion range. For example, when methane is used as a hydrocarbon gas, its combustion range is 5 methane.
Since it is about 15%, the amount of air blown is adjusted so that the mixed gas has such a ratio.

With such a configuration, when the hydrocarbon gas is used for the internal combustion engine, the hydrocarbon gas can be directly supplied from the storage tank 10 to the internal combustion engine without passing through the carburetor.

Further, according to the configuration of FIG. 19, since the internal heat exchanger 76 is not provided in the storage tank 10, a large effective space can be secured, and the storage amount of the hydrocarbon gas in the storage tank 10 can be increased. Can also be increased.

[0097]

As described above, according to the present invention,
By arranging the storage tank in the middle of the gas flow path, a flow velocity is given during the adsorption of the hydrocarbon gas, so that water condensation on the surface of the adsorbent can be suppressed. Also,
Part of the gas discharged from the storage tank is recirculated to the inlet side of the storage tank, and cooling is performed at that time, so that the heat of adsorption generated in the adsorbent can be removed and the temperature of the adsorbent in the storage tank decreases. Therefore, the amount of adsorption of the hydrocarbon gas can be increased. Further, the temperature of the adsorbent can be made uniform, and water condensation on the surface of the adsorbent caused by the temperature distribution of the adsorbent can be suppressed. Further, since excess water contained in the gas circulated to the inlet side of the storage tank is removed, condensation of water on the surface of the adsorbent can be further suppressed.

Further, since the agitating means is provided in the storage tank to agitate the adsorbent, the adsorbent is given a flow rate relatively to the water vapor and the hydrocarbon gas, thereby suppressing water condensation. . In addition, a ventilation container is provided in the storage tank, and the adsorbent is accommodated in the ventilation container and gas is introduced from the lower part of the ventilation container. Is given a flow velocity, which can also suppress water condensation.

Further, even when the storage tank is vibrated by the vibration applying means, the flow velocity is relatively given between the storage tank and the gas.
Similarly, water condensation can be suppressed.

When the present invention is applied to a vehicle, only the storage tank needs to be mounted on the vehicle, so that the equipment to be mounted on the vehicle can be made compact.

If the adsorbent is filled in a honeycomb structure formed of a material having a high thermal conductivity, the heat release of the adsorbent can be promoted, and the temperature distribution can be made uniform. Can be suppressed.

Further, if electrodes are provided on one end and the other end in the longitudinal direction of the honeycomb structure and are heated by energization, the entire honeycomb structure can be uniformly heated, and the desorption and release of hydrocarbon gas is promoted. be able to. At this time, by providing three or more electrodes and sequentially heating from the outlet side of the honeycomb structure, the heated and desorbed hydrocarbon gas can be prevented from passing through the low-temperature portion, and the water entrained by the hydrocarbon gas can be prevented. Condensation can be suppressed.

Further, the storage tank accommodates a metal layered structure whose interior is separated by partition walls,
By energizing this, the temperature in the longitudinal direction of the storage tank can be made uniform, and hydrocarbon gas can be desorbed while suppressing water condensation.

Further, by detecting a predetermined condition for forming a hydrate formation region in advance and appropriately heating the inside of the storage tank, formation of hydrate can be prevented, and clogging of pipes and harmful load on the storage tank can be prevented. can do.

Further, at least a part of the structure of the storage tank is heated or the flow rate of the filling gas is set to 30 to 3 at the time of filling.
By setting it to 00 cc / min · g, water condensation can be suppressed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of a hydrocarbon gas storage device according to the present invention.

FIG. 2 is a configuration diagram showing a modification of the first embodiment of the hydrocarbon gas storage device according to the present invention.

FIG. 3 is a diagram showing a change over time of heat of adsorption generated when a gas is adsorbed on an adsorbent.

FIG. 4 is a diagram showing a configuration of a third embodiment of the hydrocarbon gas storage device according to the present invention.

FIG. 5 is a diagram showing a configuration of a storage tank used in a hydrocarbon gas storage device according to a fourth embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a configuration of a rotary drum provided in the storage tank illustrated in FIG.

FIG. 7 is a sectional view showing a configuration of a rotating body provided in the storage tank shown in FIG.

FIG. 8 is a diagram showing a configuration of a storage tank used in a hydrocarbon gas storage device according to a fifth embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of a storage tank used in a hydrocarbon gas storage device according to a seventh embodiment of the present invention.

10 is a diagram showing a configuration of a honeycomb structure used for the storage tank shown in FIG.

FIG. 11 is a cross-sectional view illustrating a configuration of a honeycomb housing pipe that houses the honeycomb structure illustrated in FIG.

12 is an explanatory diagram showing an example of a method of using the storage tank shown in FIG.

FIG. 13 is a view showing a modification of the honeycomb structure shown in FIG. 9;

FIG. 14 is a view showing a configuration of a storage tank used in Embodiment 8 of the hydrocarbon gas storage device according to the present invention.

FIG. 15 is a sectional view showing a configuration of a storage tank used in a hydrocarbon gas storage device according to a ninth embodiment of the present invention.

FIG. 16 is an explanatory diagram showing a region where methane hydrate is formed.

FIG. 17 is an explanatory diagram showing the probability of causing water condensation on the adsorbent surface with respect to the flow rate of hydrocarbon gas blown per unit weight of activated carbon.

FIG. 18 is a view showing a configuration of a hydrocarbon gas storage device according to Embodiment 13 of the present invention.

FIG. 19 is a view showing a modification of Embodiment 13 of the hydrocarbon gas storage device according to the present invention.

[Explanation of symbols]

10 storage tank, 12 adsorbent, 14 water supply tank, 1
6 pump, 18 separator, 20 heat exchanger, 22 cooling water tank, 24 pump, 26 recovery tank, 28 regulator, 30 outer case, 32 rotating drum, 34
Porous membrane, 36 axes, 38 motors, 40 seals,
42 gas inlet, 44 blades, 46 rotating bodies, 48 fins, 50 air-permeable container, 52 manifold, 54
Gas inlet pipe, 56 gas outlet pipe, 58 honeycomb structure, 60 porous membrane, 62 cooling water / hot water supply pipe, 6
4 cooling water / hot water outlet pipe, 66 housing pipe, 68 honeycomb housing pipe, 70 gap, 72 electrode, 74 reinforcing member, 76 internal heat exchanger, 78 hot water tank, 80 air feed pump, 82 regulator, 84 pressure gauge, 86 Regulator, 88 air heater.

Claims (21)

[Claims] 1. A hydrocarbon gas storage device for adsorbing a hydrocarbon gas after adsorbing water in advance on an adsorbent housed in a storage tank, wherein the storage tank is disposed in the middle of a gas flow path. A storage device for hydrocarbon gas. 2. The hydrocarbon gas storage device according to claim 1, wherein the gas flowing out of the storage tank is returned to an inlet side of the storage tank. 3. The hydrocarbon gas storage device according to claim 2, wherein the gas flowing out of the storage tank is cooled and then returned to the inlet side of the storage tank. apparatus. 4. The hydrocarbon gas storage device according to claim 2, wherein the gas flowing out of the storage tank is returned to the inlet side of the storage tank after separating water. Storage device. 5. The hydrocarbon gas storage device according to claim 4, wherein a humidity in the storage tank is detected, and the reflux is performed when a humidity equal to or higher than a predetermined value is detected. Storage device. 6. A hydrocarbon gas storage device for preliminarily adsorbing water on an adsorbent housed in a storage tank and then adsorbing a hydrocarbon gas, wherein the storage tank includes a stirring means inside. Characteristic hydrocarbon gas storage device. 7. A hydrocarbon gas storage device for adsorbing water before adsorbing water to an adsorbent housed in a storage tank, wherein the storage tank leaves a space above the gravity direction. A storage device for hydrocarbon gas, comprising a gas permeable container filled with an adsorbent, wherein a hydrocarbon gas is introduced from a lower portion of the gas permeable container. 8. A hydrocarbon gas storage device for adsorbing water in advance to an adsorbent contained in a storage tank and then adsorbing a hydrocarbon gas, wherein the storage tank includes vibration imparting means. Hydrocarbon gas storage device. 9. A hydrocarbon gas storage device for adsorbing water before adsorbing water into an adsorbent housed in a storage tank, wherein the storage tank is mounted on a vehicle and has a gas supply port. Gas supply means connected to the gas supply port to supply gas; and gas recirculation means connected to the gas discharge port to recirculate the discharged gas to the gas supply port. A storage device for hydrocarbon gas, comprising: a gas supply facility having the following: and the storage tank. 10. A storage tank which contains an adsorbent for adsorbing hydrocarbon gas after adsorbing water in advance, has a gas supply port and a gas discharge port, and is mounted on a vehicle. 11. A gas supply facility for supplying gas to a storage tank according to claim 10, wherein said gas supply facility is connected to said gas supply port, and is connected to gas supply means for supplying gas, and said gas discharge port. Gas recirculation means for recirculating discharged gas to the gas supply port. 12. A hydrocarbon gas storage device for adsorbing a hydrocarbon gas after adsorbing water in advance to an adsorbent housed in a storage tank, wherein the adsorbent has a higher thermal conductivity than the adsorbent. A storage device for hydrocarbon gas, which is filled in a hollow portion of a honeycomb structure. 13. The hydrocarbon gas storage device according to claim 12, wherein the honeycomb structure is made of a metal. 14. The hydrocarbon gas storage device according to claim 13, wherein electrodes are provided at one end and the other end in the longitudinal direction of the honeycomb structure. . 15. The hydrocarbon gas storage device according to claim 13, wherein electrodes are provided at three or more positions including one end and the other end in the longitudinal direction of the honeycomb structure. Storage device for hydrogen gas. 16. The hydrocarbon gas storage device according to claim 15, wherein when the hydrocarbon gas is desorbed and released, heating is performed from the honeycomb structure on the outlet side. 17. A hydrocarbon gas storage device in which water is adsorbed in advance to an adsorbent housed in a storage tank and then a hydrocarbon gas is adsorbed, wherein the storage tank is separated by a partition. A storage device for hydrocarbon gas, wherein a metal layered structure to be formed is accommodated, and a cavity between the partition walls is filled with an adsorbent. 18. The hydrocarbon gas storage device according to claim 17, wherein each of the partition walls is provided with an electrode. 19. The hydrocarbon gas storage device according to claim 14, wherein a predetermined condition for forming a hydrate formation region is detected and heating is performed. Characteristic hydrocarbon gas storage device. 20. A hydrocarbon gas storage device for adsorbing a hydrocarbon gas after adsorbing water on an adsorbent housed in the storage tank in advance, wherein the storage tank is structured when the hydrocarbon gas is charged. A storage device for hydrocarbon gas, wherein at least a part of the storage device is heated. 21. A hydrocarbon gas storage device for adsorbing a hydrocarbon gas after adsorbing water in advance to an adsorbent housed in a storage tank, wherein a flow rate of the filling gas at the time of filling the hydrocarbon gas is determined. A storage device for hydrocarbon gas, which is set to 30 to 300 cc / min · g.