JP2008267510A - Liquefied petroleum gas supply method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow easy replacement of a cylinder while maintaining the supply of liquefied petroleum gas (LPG) similar to conventional one with natural vaporization. <P>SOLUTION: To combustion equipment F, a stationary metal cylinder 10<SB>1</SB>and a replaceable cylinder 10<SB>2</SB>are connected via a gas meter M and a gas pressure regulator C so that gas pressure of a gas phase b in the replaceable cylinder is used for transferring fuel gas from the replaceable cylinder into the stationary cylinder. The metal cylinder is initially connected to the gas pressure regulator, and so gas similar to conventional one is supplied with natural vaporization in the metal cylinder as long as LPG is filled in the stationary cylinder. As the LPG is reduced with the gas supplied from the stationary cylinder, the LPG therein is transferred from the replaceable cylinder into the stationary cylinder. When the amount of the LPG in the replaceable cylinder is reduced, the cylinder is replaced with a cylinder in which LPG is fully filled. In this case, the replaceable cylinder which is formed of a resin or has reduced capacity and size is lighter and easier to replace. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method and apparatus for supplying liquefied petroleum gas to combustion equipment in each household in areas where city gas is not supplied.

  The supply of this kind of liquefied petroleum gas (not only LPG but also DME (dimethyl ether) as appropriate. Hereinafter, generically referred to as “LPG”) is usually supplied within the home A as shown in FIG. Is connected to a container 10 filled with LPG via a gas meter M, a gas pressure regulator C, and a container valve (open / close valve) V, and the LPG in the container 10 is vaporized by natural vaporization. Fuel gas (liquefied petroleum gas) a is sent from the container 10 to the combustion equipment F.

  The supply of the LPG by natural vaporization consists of the LPG liquid (liquid phase c) and the LPG gas (gas phase b) inside the container 10, and when the gas a starts to be consumed, the gas in the gas phase b burns. Supplied to the device F, the gas pressure in the container 10 decreases. When the gas pressure decreases, the gas liquid evaporates and vaporizes from the liquid phase c in the container 10 to generate vaporized gas (LPG gas).

At this time, the amount of heat required for vaporization (latent heat of vaporization) is covered by the amount of heat possessed by the liquid phase c (LPG liquid) itself, so the temperature of the liquid phase c decreases. When the temperature of the liquid phase c is lowered, a temperature difference is generated between the liquid phase c and the atmosphere around the container 10, and the heat of the atmosphere is absorbed by the liquid phase c through the wall of the container 10. Is vaporized by the heat and becomes LPG gas. This action is continuously performed, and the fuel gas a is continuously supplied from the container 10 to the combustion device F.
Further, the amount of the liquid phase c in the natural vaporization of the LPG that can absorb the heat of the atmosphere is such that the larger the amount of the liquid phase c in the container 10 is, the more the liquid phase c comes into contact with the atmosphere through the wall of the container 10. Since the area increases, the number increases, and the higher the thermal conductivity of the container 10, the more.

Further, the consumption amount of the fuel gas a is measured by the meter M, and before the LPG in the container 10 is exhausted, the container 10 is replaced with a fully filled LPG container (usually 85% of the container content) and burned. The supply of the fuel gas a (LPG gas) to the device F is prevented from stopping (see Patent Document 1).
At this time, in order to reduce the frequency | count of the replacement | exchange, the some container 10 may be connected in parallel with the gas pressure regulator C (refer patent document 1 FIG. 1).
JP-A-9-310800

When the plurality of containers 10 are connected in parallel to the gas pressure regulator C, the fuel gas a is individually supplied from the containers 10 to the combustion equipment F. At this time, for example, in the technique of Patent Document 1, since the overflow prevention connector is provided in each container (see Patent Document 1, FIG. 1, paragraph 00002), the fuel gas a does not travel between the containers. The fuel gas a is individually supplied from the container to the combustion equipment F. For this reason, the containers are exchanged all at once (see Patent Document 1, paragraphs 0003 and 0011).
This simultaneous exchange can reduce the number of exchanges, but if the number increases, it becomes a troublesome work.

  In addition, there is a system in which a plurality of containers 10 are arranged in the LPG gas supply to the home, but each container 10 is connected in parallel to the gas pressure regulator C, but the LPGs go back and forth. If one container 10 is empty, the connection to the gas pressure regulator C is switched from the empty container 10 to the fully-filled container 10 by the switching valve to supply the fuel gas a. continue.

  Under such circumstances, the use of light containers 10 has become necessary due to the aging of today's workers in this type of industry and the need for securing container replacement workers due to improved convenience in container transportation. In particular, in a mountain area where this gas supply system must be adopted, the distance for carrying the container 10 by human power becomes long, and the demand is high. At this time, even if the number of times of replacement increases, it may be desired that the work at the time of replacement is easy (light work).

As a means for the light work, it can be considered that the container 10 is made of resin or a small-capacity small container 10.
However, since the resin has a lower thermal conductivity than metals such as steel, the amount of absorption of atmospheric heat in the liquid phase c during natural vaporization associated with gas consumption is not sufficient, and the gas to the smooth combustion equipment F There is a high risk of not being supplied.
Further, when the container 10 is downsized, the area where the liquid phase c accompanying the gas consumption comes into contact with the atmosphere via the wall of the container 10 is reduced, and similarly, the atmospheric heat of the liquid phase c in the natural vaporization accompanying the gas consumption. As a result, the gas may not be supplied to the combustion device F smoothly. When the miniaturized container is made of resin, the degree of concern is increased.

  Furthermore, due to demands for cost reduction, DME has come to be used today as an alternative fuel for LPG. The DME is cheaper than LPG but heavy because of its high specific gravity. For this reason, the container 10 filled with DME is smaller than the LPG-filled container 10, and the degree of concern is further increased. Further, since DME has a larger latent heat of vaporization, which is the amount of heat required for vaporization, than LPG, the concern further increases.

  In view of the above circumstances, an object of the present invention is to facilitate container replacement while maintaining supply of natural gas in a metal container similar to the conventional one.

  In order to achieve the above-mentioned object, the present invention uses at least two LPG filling containers (fuel) for supplying fuel gas to combustion equipment, one of which is stationary and made of metal, and is first connected to the gas pressure regulator. The other was connected to a stationary container for replacement, and the LPG in the replacement container was transferred to the stationary container by the gas pressure in the gas phase of the replacement container.

In this way, since the metal stationary container is first connected to the gas pressure regulator, as long as the stationary container is filled with LPG, the conventional metal container is used. Gas is supplied by natural vaporization.
Due to the decrease in LPG accompanying the gas supply from the stationary container, the LPG in the replacement container is transferred to the container. The movement is performed by the gas pressure in the gas phase of the replacement container until the gas pressures in both containers are balanced. Note that the movement mode of LPG (whether it moves with gas or liquid) varies depending on the connection mode between the stationary container and the replacement container, and details thereof will be described in the embodiments described later.
When the amount of LPG in the replacement container decreases, the container is replaced with a container full of LPG. At this time, if the replacement container is made of a resin or a small-capacity small container, the replacement becomes easy due to the light weight.

  As a configuration of the present invention, a container filled with liquefied petroleum gas is connected to a combustion device via a gas meter and a gas pressure regulator, the liquefied petroleum gas is vaporized by natural vaporization, and the container is then transferred to the combustion device. In a liquefied petroleum gas supply device for sending fuel gas, a container initially connected to the gas pressure regulator is made of metal for deferment, a replacement container is connected to the deferment container, and the gas in the replacement container is A configuration can be adopted in which the LPG in the replacement container is transferred to the stationary container by the gas pressure of the phase.

At this time, the number of replacement containers may be at least one (one), and may be two or more. In the case of the plurality, the replacement containers may be connected in series, in parallel, or in any desired number of units connected in parallel and connected in parallel.
Further, the material of the replacement container may be made of metal as in the conventional case, but if it is made of resin such as fiber reinforced plastic (FRP), the weight can be reduced. Not only the resin but also the metal can be reduced in weight if the replacement container has a smaller capacity (downsizing) than the stationary container.

In this configuration, the connection mode between the stationary container and the replacement container may be any as long as LPG is replenished from the replacement container by the gas pressure of the gas phase as the LPG of the stationary container decreases. . For example, a stationary container and a replacement container are connected between the gas phases, a stationary container and a replacement container are connected between the liquid phases, or the stationary container and the replacement container are connected to the former gas phase. It is possible to connect between the latter liquid phases.
At this time, when the replacement container is connected to the stationary container in its liquid phase, the stationary container and the replacement container are connected in series. This is because the liquid phase in the replacement container may flow into the combustion equipment via the gas pressure regulator and meter if the connection is in parallel. Moreover, it is preferable to provide an overfill prevention device in the stationary container to prevent the liquid phase of the replacement container from flowing in a certain amount or more.

When the stationary container and the replacement container are connected with each other in the gas phase, since the gas phase of the replacement container is also connected to the gas pressure regulator, as long as the replacement container is filled with LPG, Gas is also supplied to the combustion equipment by natural vaporization using the replacement container.
In addition, when the liquid phase of the replacement container is connected to the stationary container, as long as the replacement container is filled with LPG, the liquid content of the replacement container moves to the stationary container, and the moved liquid content Is gasified and supplied to the combustion equipment.

  The LPG supply method (supply method) in these LPG supply devices is performed by exchanging the replacement container, and the supply of LPG to the combustion equipment is continued. At this time, the initial installation of the stationary container and the replacement container (when both containers are installed for the first time), both containers may be fully filled, but the stationary container is empty or has an LPG filling amount that is easy to carry And the replacement container can be fully filled. In this way, if the replacement container is light, the container can be easily transported from the beginning of installation. The amount of filling that is easy to carry and the resin or size reduction for weight reduction are appropriately set based on actual work.

At the beginning of the installation, when the stationary container and the replacement container are connected with each other in the gas phase, and the stationary container is empty, gas flows into the stationary container from the replacement container and is liquefied again. The gas phase is gasified from the re-liquefied liquid phase, and the amount of the gas is increased compared to the gas supply to the combustion equipment in the case of the replacement container alone.
In addition, when the liquid phase of the replacement container is connected to the stationary container at the beginning of the installation, and the stationary container is empty, the gas liquid flows into the stationary container from the replacement container and is gasified, This is equivalent to supplying gas to the combustion equipment when a stationary container is used alone.
In any case, when the stationary container is filled with LPG, the gas is supplied from the LPG in the stationary container to the combustion equipment.

As described above, the present invention comprises at least two LPG-filled containers, one of which is made of metal for stationary use and the other of which is used for replacement by the gas pressure of the gas phase, and the fuel gas in the replacement container Since the gas is supplied by natural vaporization using the same metal container as before, the gas supply can be secured, and the replacement container can be reduced in weight and replaced. Can be easy.
In particular, when DME is used as an alternative fuel for LPG, or when a mixed fuel of LPG and DME is used, it is heavier and the latent heat of vaporization increases, but its evaporation can be achieved by appropriately selecting the size of the stationary container. Sufficient evaporation can be obtained even with latent heat. On the other hand, if the replacement container is made lighter by downsizing or the like, the replacement work is easy.

FIG. 1 shows an embodiment. In this embodiment as well, a container 10 filled with LPG via a gas meter M, a gas pressure regulator C, and a container valve V is applied to a combustion device F in a household A, as in the prior art. Connected.
The container 10 is made of a metallic container 10 ₁ for stationary replacement of the FRP (resin) container 10 ₂ which, the metal container 10 ₁ is connected to a gas pressure regulator C, the metal holder 10 connecting the resin vessel 10 ₂ in series _1. The connection, the metal container 10 ₁ and the resin vessel 10 ₂ is connected between the gas phase b.

In this embodiment, when the gas is consumed by the combustion device F, the liquid phase c is vaporized by natural vaporization so that the pressures of both gas phases b are balanced in both the containers 10 ₁ , 10 ₂ . Supply gas.
At this time, the LPG is affected by the outside air temperature around the container 10, and if the outside air temperature rises, the liquid phase c evaporates to increase the pressure (gas pressure) of the gas phase b and the outside air temperature falls. If it does, it will reliquefy and a gas pressure will fall. The change in gas pressure due to the outside air temperature is performed by heat conduction through the peripheral wall of the container 10.

Here, the basic temperature change of the day becomes the highest temperature of the day around noon, and then decreases. For this reason, the gas pressure in the container 10 (pressure of the gas phase b) rises as the outside air temperature rises until around noon, and then rises as the outside air temperature falls. At this time, because of the high metal as compared with the resin thermal conductivity, the temperature of the temperature decrease in association with the container 10 ₁ is turned to decrease more than the chamber 10 _2, the metal container 10 ₁ is made of resin the liquefying more than the chamber 10 _2. If liquefied, reduced gas pressure equilibrium of both container 10 _1, 10 ₂ of the gas pressure is broken, so that the gas is further liquefied flows from the resin vessel 10 ₂ in a metal container 10 _1. That is, the lowering of the external temperature, LPG liquid accumulates in the metal container 10 _1.

On the other hand, the consumption trend of LPG gas in general households is relatively small during breakfast and lunch cooking. Most of the consumption is from evening to night (after evening) such as dinner cooking and bath watering. is there.
The evening that a large amount of consumption is made by the outside air temperature drop from early afternoon, the metal container 10 ₁ is accumulated much again liquefied LPG, along with its mass consumption, the metal container 10 in ₁ It is vaporized from the vapor phase b and re-liquefied mass of the liquid phase c with the gas is supplied, the gas is supplied by vaporizing from a vapor phase b and the liquid phase c of the resin vessel 10 _2. Therefore, and if it supplied in the metal container 10 ₁ alone, compared with the case of being supplied with the resin vessel 10 ₂ alone, in the former case, the gas phase b and the liquid of the resin vessel 10 in ₂ supply of gas vaporized from the phase c, in the latter case, the increase in the metal holder 10 vapor b and supply of gas vaporized from the liquid phase c in _one gas supply to each combustion device F It becomes.

At this time, even when a plurality of containers are connected to the combustion equipment F via the gas meter M or the like, gas vaporized from the gas phase b and the liquid phase c is supplied from the containers to the combustion equipment F. The gas supply amount increases as compared with the case of supplying from one container. In this embodiment, the liquid phase c of the metal container 10 ₁ is the liquid phase c was in the resin chamber 10 _2, than in the resin chamber 10 _2, the metal container 10 ₁ Since the inside is easily absorbed by the air around the container, it is easy to vaporize. Since the gas supply amount to the combustion device F increases due to this easy vaporization, the gas supply amount to the combustion device F per hour is smaller than when the plurality of containers 10 ₁ , 10 ₂ are all made of resin. To increase.

Be repeated the daily action of above, LPG transfer from both containers ₁₀ 1, 10 ₂ of the LPG consumption and resin vessel 10 ₂ to the metal container 10 ₁ is performed, both containers ₁₀ 1, 10 ₂ and LPG amount decreases, (if empty container ₁₀ 1, 10 ₂₎ if the amount is decreased below the predetermined amount, to replace the empty resin vessel 10 ₂ resin kettle 10 ₂ of full filling. By this exchange, the gas is transferred in both containers 10 ₁ and 10 ₂ until the gas pressure (pressure of the gas phase b) is balanced.

By the above action, from both containers ₁₀ 1, 10 _2, the fuel gas a is consumed LPG is supplied in both containers ₁₀ 1, 10 ₂ into the combustion device F, the container ₁₀ 1, 10 ₂ a certain time from the installation or the gas meter M, the resin vessel 10 ₂ if near empty or empty, replace the resin vessel 10 ₂ resin kettle 10 ₂ of full filling. Through this replacement operation, the LPG is continuously supplied to the combustion equipment.

In this embodiment, when first installed a metallic container 10 ₁ and the resin vessel 10 ₂ (both containers ₁₀ 1, 10 ₂ of the installation initially), the metal container 10 ₁ and empty containers, the resin vessel 10 ₂ If the fully-filled, initially gas is supplied from the gas phase b of the resin vessel 10 ₂ in a metal container 10 _1, the gas is supplied to the combustion apparatus F. The date of the installation initially, as described above, since the day, with the lowering of the ambient temperature, the metal container 10 ₁ from the resin vessel 10 ₂ and gas flows liquefied, LPG in a metal container 10 in ₁ Liquid accumulates. If we liquid phase c in a metal container 10 in _1, LPG is shifted to the action of connection status of the metal container 10 ₁ and the resin vessel 10 ₂ filled.

The above embodiment has been connected to the metal holder 10 ₁ resin vessel 10 ₂ in series, as shown in FIG. 2, also connect the resin vessel 10 ₂ in parallel to the metal container 10 _1, similar Each of the above actions can be obtained. In this case, the container valve V of the metal container 10 _1, time of release, as can flow in both directions, by the gas pressure of the resin vessel 10 ₂ vapor b, and the gas, the metal container 10 ₁ To be able to migrate to.

Shows another embodiment in FIG. 3, this embodiment, in the embodiment shown in Figure 1 above, the metal container 10 ₁ and the resin vessel 10 _2, which are connected between the liquid phase c The connecting pipe reaches near the bottom of both the containers 10 ₁ , 10 ₂ , and the end thereof is positioned in the liquid phase c as long as the liquid phase c exists.

In this embodiment, the gas is consumed in the combustion device F, from the gas phase b of the metal container 10 ₁ is supplied with a gas that the gas pressure decreases. When the gas pressure of the metal container 10 ₁ is reduced, the gas liquid pushed metal holder 10 ₁ of liquid phase of the liquid phase c by the gas pressure of the the gas pressure is higher of the resin vessel 10 ₂ vapor b c.

At this time, the liquid phase c of the metal container 10 _1, as long as there is liquid phase c of the resin vessel 10 in ₂ (as long as there remains a gas-liquid), a gas pressure of the resin vessel 10 ₂ vapor b Accordingly, both containers ₁₀ 1, 10 ₂ in the gas phase b, to a pressure of b is balanced, the resin vessel 10 _2, gas-liquid is replenished to the liquid phase c of the metal container 10 _1.
The replenishment of this gas liquid usually reduces the liquid phase c level with the gas consumption (the gas liquid volume decreases), and the evaporation volume decreases and the gas supply volume decreases accordingly. since the liquid phase c of the container 10 ₁ is to be maintained at a certain level, and thus be minimized even decrease amount of evaporation.

Further, similarly to the above embodiment, compared with the case where vaporized in resin vessel 10 _2, to vaporize the metal holder 10 ₁ good thermal conductivity, the thermal absorption degree of the outside air is high, the resin vessel 10 vaporization of the liquid phase c that has flowed into the metal container 10 _1-2 also smooth. That is, compared to the case of gasified vaporized in the resin vessel 10 _2, therefore gasification also smooth, a smooth even gas supply to the combustion device F.
In this way, sufficient fuel gas a is supplied to the combustion equipment F.

Shows a further embodiment in FIG. 4, this embodiment, in the embodiment shown in Figure 1 above, the metal container 10 ₁ and the resin vessel 10 _2, gas phase b and the latter 10 of the former 10 ₁ connected between the _two liquid phases c, in which the overfill protection device 20 is provided in a metal container 10 ₁ connecting end. Further, the connection pipe reached near the bottom of the resin vessel 10 _2, as long as there is a liquid phase c, the end is made to be positioned within the liquid phase c.
The overfill protection device 20, as shown in FIG. 4 (b), the float valve 23 provided in the mouth of the discharge pipe 21 of the container valve V, when the liquid phase c of the container 10 ₁ is constant level, the by the float 22, the float valve 23 is closed to prevent further flow of gas liquids from the resin vessel 10 _2.

In this embodiment, the gas is consumed in the combustion device F, from the gas phase b of the metal container 10 ₁ is supplied with a gas that the gas pressure decreases. When the gas pressure of the metal container 10 ₁ is reduced, the gas liquid pushed metal holder 10 ₁ of the gas phase of the liquid phase c by the gas pressure of the higher gas pressures resin vessel 10 _second vapor phase b b is introduced into the liquid phase c. Its introduction gas liquids from the resin vessel 10 ₂ to the metal container 10 ₁ is continues as long as there is a difference in gas pressure between the two containers 10 _2, 10 _1, a predetermined amount or more by the overfill protection device 20 Inflow is prevented.
By preventing the inflow of a certain amount or more, even if there is a gas pressure difference between the two containers 10 ₁ , 10 ₁₂ , there is no inflow of gas liquid above a certain level of the liquid phase c into the metal container 101 ₁ , The level of the liquid phase c is kept constant.

Also in this embodiment, like the embodiment of FIG. 3, compared with the case where vaporized in resin vessel 10 _2, to vaporize the metal holder 10 ₁ good thermal conductivity, the absorption degree of the outside air temperature is high Therefore, the vaporization is smooth. That is, compared to the case of gasified vaporized in the resin vessel 10 _2, therefore gasification also smooth, a smooth even gas supply to the combustion device F.

Further, like the embodiment of FIG. 3, the liquid phase c of the metal container 10 _1, as long as there is liquid phase c of the resin vessel 10 in ₂ (as long as there remains a gas-liquid), the resin container 10 the gas pressure ₂ in the gas phase b, both containers ₁₀ 1, 10 ₂ in the gas phase b, to a pressure of b is balanced, the resin vessel 10 _2, gas liquid in the liquid phase c of the metal container 10 ₁ To be replenished. Therefore, since the liquidus c metallic container 10 ₁ is maintained at a certain level, and thus be minimized even decrease amount of evaporation.

The configuration of the overfill prevention device 20 is not limited to that shown in FIG. 4 (b). For example, a well-known device such as a combination of a liquid level meter using sound waves and an electromagnetic valve that opens and closes by the signal is used. It can be adopted as appropriate. Further, the overfill protection device 20, even in the embodiment shown in FIG. 3, for example, as in the chain line, is provided in a metal container 10 _1, the resin vessel 10 ₂ fixed amount (fixed level) or more The gas liquid can be prevented from flowing in.

Figure 3, also in the embodiment of FIG. 4, when installed for the first time the metal container 10 ₁ and the resin vessel 10 _2, when the metal container 10 ₁ and empty containers, was fully filled with the resin vessel 10 _2, initially, the gas liquid is supplied from the liquid phase c of the resin vessel 10 ₂ in a metal container 10 _1, the gas liquid is vaporized the gas pressure and the gas pressure in the gas phase b of the resin vessel 10 ₂ equilibrium if, LPG supply from the resin vessel 10 ₂ to the metal container 10 ₁ is stopped. Thereafter, the operation proceeds to the above operation.

Above each embodiment, as an exchange container 10 ₂ was used a resin container, it can be exchanged for container 10 ₂ and metal container. In this case, as is its replacement containers 10 ₂ is also easy transportation is in fully filled, it is preferable that the compact containers of small capacity.
If the replacement container 10 ₂ and the small-capacity containers, made of resin, regardless of the metal, for example, stationary container 10 ₁ to 120 liters internal volume, use a replacement container 10 ₂ to 50 liters Contents while, if that of the installation also originally fully filled both, as described above, both the container 10 _1, 10 ₂ has a gas pressure difference, and as long as there is liquid phase c the replacement vessel 10 _2, replacement because the gas liquid is fed from the container 10 ₂ to the stationary container 10 _1, the liquid phase c of high level (full fill near level) is to be secured to the stationary container 10 _1. Since the high-level liquid phase c performs a smooth gas evaporation operation, the fuel gas a can be stably supplied.
Therefore, by a small replacement of the replacement containers 10 ₂ such as contents of 50 liters gas evaporation can maintain the amount of gas in a large stationary container 10 _1, such internal volume 120 liters.

Further, in each embodiment, installation initially, when as the stationary container 10 ₁ empty, replacement container 10 ₂ prepared above two, to form a sufficient liquid phase c in stationary container 10 ₁ , if almost empty LPG amount of the replacement containers 10 _2, all of then removing the replacement vessel 10 _2, thereafter, connecting a replacement container 10 ₂ of full filling of one deferred container 10 ₁ To be able to.

  In each of the above embodiments, etc., the fuel gas a is LPG, but it goes without saying that the present invention can be adopted in the same manner even when DME or a mixture of LPG and DME is used. Further, the present invention can be applied not only to the combustion device F in the home A but also to supply LPG to the combustion device F in various factories.

Schematic diagram of one embodiment Schematic diagram of the main part of another embodiment Schematic diagram of the main part of another embodiment Another embodiment is shown, (a) is a schematic diagram of the main part, (b) is a cross-sectional view of the mounting portion of the overfill prevention device Schematic diagram of conventional example

Explanation of symbols

10 LPG filled container 10 ₁ Deferred container (metal container)
10 ₂ Replacement container (resin container)
20 Overfill prevention device a Fuel gas (LPG gas)
b Gas phase c Liquid phase A Household C Gas pressure regulator F Combustion equipment M Meter V Vessel valve

Claims (9)

A container (10) filled with liquefied petroleum gas is connected to the combustion equipment (F) via a gas meter (M) and a gas pressure regulator (C), and the liquefied petroleum gas is vaporized by natural vaporization. In the liquefied petroleum gas supply device for sending the fuel gas (a) from (10) to the combustion equipment (F),
The container (10 ₁ ) that is first connected to the gas pressure regulator (C) is made of metal for stationary use, and the replacement container (10 ₂ ) is connected to the stationary container (10 ₁ ) for replacement. the gas pressure in the gas phase (b) of the container (10 _2), liquefied petroleum gas, characterized in that shifting the liquefied petroleum gas the interchangeable container (10 ₂₎ in the container (10 ₁₎ for the stationary Feeding device. The liquefied petroleum gas supply device according to claim 1, wherein the replacement container (10 ₂ ) is made of resin. The liquefied petroleum gas supply device according to claim 1 or 2, wherein the replacement container (10 ₂ ) has a smaller capacity than the stationary container (10 ₁ ). The liquefied petroleum gas supply device according to any one of claims 1 to 3, wherein the stationary container (10 ₁ ) and the replacement container (10 ₂ ) are connected between the gas phases (b). The supply of liquefied petroleum gas according to any one of claims 1 to 3, wherein the stationary container (10 ₁ ) and the replacement container (10 ₂ ) are connected in series between the liquid phase (c). apparatus. The stationary container (10 ₁ ) and the replacement container (10 ₂ ) are connected in series between the former gas phase (b) and the latter liquid phase (c). The liquefied petroleum gas supply device according to any one of the above. The stationary container (10 ₁ ) is provided with an overfill prevention device (20) for preventing the liquid phase (c) of the liquefied petroleum gas from the replacement container (10 ₂ ) from flowing beyond a certain level. The apparatus for supplying liquefied petroleum gas according to claim 5 or 6. Supply of the fuel gas (a) to the combustion equipment (F) by replacement of the replacement container (10 ₂ ) using the liquefied petroleum gas supply device according to any one of claims 1 to 7. A method for supplying liquefied petroleum gas, characterized in that it is continuously performed. The initial installation of the stationary container (10 ₁ ) and the replacement container (10 ₂ ) is characterized in that the stationary container (10 ₁ ) is filled with liquefied petroleum gas that is empty or easily transported. 9. The method for supplying liquefied petroleum gas according to 8.

Images