KR20090000940A - Vaporizer - Google Patents

Abstract

A vaporizing apparatus is provided to replace the clean up LPG liquid reservoir with new one or charge LPG liquid in the reservoir without interrupting the supply of gas. A vaporizing apparatus comprises a hot water tank(10), a heat exchanger(11) installed in the hot water tank, reservoirs(Ta,Tb) containing LPG liquid(Ga,Gb), and vaporization pressure regulating valves(17a,17b) which are connected to the reservoirs and LPG inlet pipes(13a,13b), respectively, in order to supply decompressed LPG liquid to the heat exchanger. The initial outlet side pressure of the vaporization pressure regulating valve is set higher than that of the vaporization pressure regulating valve. When most of the LPG liquid in the reservoir(Ta) is consumed, the outlet side pressure of the vaporization pressure regulating valve is set higher than that of the vaporization pressure regulating valve.

Description

Vaporizer {VAPORIZER}

1 is a view showing an outline of a conventional vaporizer;

2 is an enlarged cross-sectional view of the main portion of the embodiment of FIG. 1;

3 is a schematic diagram of another conventional example;

4 is an enlarged cross-sectional view of the main portion of FIG. 3;

5 is a view showing an outline of a vaporization apparatus according to an embodiment of the present invention.

6 is a diagram showing an outline of a vaporization apparatus according to another embodiment of the present invention.

*** Description of the symbols for the main parts of the drawings ***

10 hot water tank 11, 11a, 11b heat exchanger

12, 12a, 12b Electric Heater 13, 13a, 13b LPG Liquid Inlet Tube

14 gas outlet pipe 15 chamber

16 float 16 valve

V1, 17a, 17b open / close valve (evaporation pressure regulating valve)

V2, 18, 18a, 18b Pressure Reducing Valve

B Carburetor U Consumer

G gas G0, Ga, Gb gas liquid

T, Ta, Tb Storage Tanks

Pa, Pb Vaporization Pressure

The present invention relates to a vaporization apparatus for continuing supply of gas even when the LPG of the LPG reservoir is exhausted, and more particularly, to a vaporization apparatus having two reservoirs.

The supply of fuel (G) G to the consumer from the storage tank T of the liquid LPG is a natural vaporization method of sending the gas G vaporized in the storage tank T to the consumer U through the pressure reducing valve V as shown in FIG. The upper supply path R1) and the gas liquid (LPG liquid) G0 from the reservoir T are sent to the vaporizer B through the opening / closing valve V1 and vaporized by the vaporizer B, and the gas G is sent to the consumer U through the pressure reducing valve V2. The forced vaporization method (see lower supply path R2 in the figure) is the most common.

The former natural vaporization method is inexpensive because of its simple structure, but the supply capacity of gas G is unstable because it depends on the outside temperature or the remaining liquid amount of the storage tank T. In general, when the outside temperature is high and the amount of liquid remaining is large, the amount of natural vaporization is high. On the contrary, when the outside temperature is low and the amount of liquid remaining is small, the amount of natural vaporization is small. Large storage tanks or storage containers, an increase in the number of containers). This enlargement causes a problem such as an installation space.

In the latter forced vaporization method, the supply capacity of the gas G is forcibly vaporized by forcibly gasifying the gas liquid G0 without relying on the ambient temperature or the remaining amount of the liquid in the storage tank T as in the natural vaporization method. It is possible to provide stable gas supply even at T (low container count) (see Patent Documents 1 and 2). For this reason, such forced vaporization is the mainstream.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2003-214596

[Patent Document 2] Japanese Unexamined Patent Publication No. 2003-336797

As shown in FIG. 2, the vaporization apparatus B which is the vaporization apparatus in this forced vaporization system is an electric heat exchanger 11 which consists of a heat exchanger tube, etc. in the hot water tank 10, and the electricity used as a heat source. The heater 12 is provided. The electric heater 12 warms the inside of the hot water tank 10 to make hot water a. The inlet pipe 13 of the LPG liquid G0 from the storage tank T is connected to the heat exchanger 11, and the LPG liquid G0 is connected to the hot water a. Is heated through the heat exchanger 11 and gasified, and the gas G is sent to the consumer U through the lead pipe 14.

In this vaporization apparatus B, gasification cannot be performed smoothly due to a failure of the electric heater 12 or the like and the temperature of the hot water a in the hot water tank 10 cannot be maintained. As shown, when the float 16 in the chamber 15 rises and the valve 16a is closed, the return of the LPG liquid G0 to the consumer U is prevented. In the figure, 19 is a liquid discharge valve of the hot water tank 10.

In the forced vaporization method described above, if the vaporizer B cannot send gas G to the consumer U due to any failure, it causes a great damage to the consumer U. For this reason, as shown in Fig. 1, a pair of vaporizers B and B are inserted into the supply path R2 from the storage tank T to the consumer U, and, for example, the upper vaporizer B is reserved. If the lower vaporizer B fails, the other side (upper) vaporizer B allows the gas liquid G0 of the reservoir T to be switched (manually) to continue to send gas G to the consumer U.

However, when switching to another vaporizer B, since the other vaporizer B has stopped so far, it requires time for its operation. That is, the water in the hot water tank 10 of the other vaporizer B is not warmed, and the valve 16a is kept closed until the temperature is raised by the electric heater 12 to the set temperature to vaporize the gas liquid G0. In the meantime, the gas G is not supplied to the consumer B.

In order to solve this problem, there is proposed a vaporizer which can smoothly carry out its function to another vaporizer B even if one vaporizer B fails.

In other words, one of the main factors that impede the operation of the vaporizer B when it moves to the other vaporizer B in the related art is that both the vaporizers B, B is to share the water bath.

In this way, when the function is transferred from one vaporizer to another, the function can be implemented without waiting for the temperature rise of the hot water tank, which was one of the obstacles to the smooth transition in the past. I can do it smoothly.

3 and 4, a plurality of heat exchangers are provided in one hot water tank, at least two heat sources are provided in the hot water tank, and an inlet pipe of LPG is connected to each of the heat exchangers. Can be adopted. Moreover, the structure which installed the heat exchanger which connected the inflow pipe of LPG in one hot water tank, and provided the some heat source in the hot water tank can be employ | adopted.

In these configurations, even if one heat source fails, the temperature of the hot water tank is maintained at a predetermined temperature or more by the other heat source, so that the gas supply can be continued within the range.

In addition, in a configuration in which a plurality of independent heat exchangers and heat sources are provided, even if the vaporization function of the heat exchanger is impossible due to a failure of the general heat exchanger and its associated member (including the electric heater), the amount of supply by other heat exchangers Even if it causes a slight decrease of the gas supply, the supply of gas can be continued, and the repair of the failed heat exchanger and the accessory is easy without interruption of the supply of gas.

One heat source may be sufficient as long as it can ensure the continued supply of gas at the time of failure of this heat exchanger and its associated members.

In the case where there are a plurality of heat exchangers and heat sources, if the at least one heat exchanger and the heat source are paired as a spare, the hot water tank is configured to change the temperature of the hot water when the gas is supplied by the preliminary vaporizer. Since it is roughly maintained, a smooth transition can be made. In each of the above configurations, the number of heat exchangers and heat sources is appropriately set according to the gas supply amount to the consumer. Moreover, as a heat source, well-known suitable means, such as an external kiln type, can be employ | adopted besides the above-mentioned electric heater.

Moreover, in the structure provided with two or more heat exchangers, since the inflow pipe of LPG liquid is connected to each of each heat exchanger, the number of vaporizers becomes as many as the number of heat exchangers. For this reason, it can be used also as a vaporization apparatus which always vaporizes them by making them (each vaporization apparatus) separate, respectively, ensuring the said effect | action.

Moreover, it can also be used as a vaporization apparatus which vaporizes a plurality of heat exchangers into one and makes it one.

However, the above-described improved vaporizer is inconvenient to stop supplying the LPG gas to the consumer U in order to charge the new LPG in the reservoir T when all of the LPG is exhausted.

That is, after closing the opening-closing valve 17a, 17b and stopping supply of LPG to the hot water tank 10, LPG is filled into the storage tank T. Then, the opening / closing valves 17a and 17b are opened to supply LPG filled in the storage tank T to the hot water tank 10 to resume gas supply to the consumer U.

Therefore, in the conventional vaporizer as described above, the gas supply to the consumer U must be temporarily stopped for the exhausted LPG.

The present invention is to solve the inconvenience, to provide a vaporization apparatus capable of filling the LPG without interruption of the gas supply to the consumer U.

In order to solve the above problems, a heat exchanger 11 is installed in the hot water tank 10 and vaporization pressure regulating valves 17a and 17b connected to a plurality of storage tanks Ta, Tb, and LPG inlet pipes 13a and 13b to the heat exchanger 11, respectively. In the vaporization apparatus for supplying the LPG liquids Ga and Gb by reducing the pressure, the outlet pressure of the vaporization pressure regulating valve 17a is initially set higher than the outlet side pressure of the vaporization pressure regulating valve 17b (first setting), and thereafter. When the LPG liquid Ga from the vaporization pressure regulating valve 17a is exhausted, the outlet pressure of the vaporization pressure regulating valve 17b is set higher than the outlet side pressure of the vaporization pressure regulating valve 17a (second setting). Provided is a vaporizer.

In addition, when the LPG liquid of the use side storage tank Ta is exhausted, it is preferable to automatically switch to the reserve side storage tank Tb by the set pressure difference of vaporization pressure regulating valve 17a, 17b. It is better to take turns depending on the exhausted state of the LPG solution.

In addition, a vaporization apparatus is characterized by filling the LPG liquid exhausted after the second setting, and replacing the storage tank Ta of the LPG liquid exhausted after the second setting with a new reservoir Ta.

(Example)

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described in detail based on drawing.

5 and 6 show an embodiment, in which the LPG is supplied using two reservoirs Ta and Tb to the vaporization apparatus B shown in FIG. 3, so that one heat exchanger 11 or two heat exchangers 11a, Vaporization by 11b. In addition, the opening / closing valves 17a and 17b have a function of a vaporization pressure regulating valve for reducing the pressure of the LPG liquids Ga and Gb to the vaporization pressures Pa and Pb. Hereinafter, the member to 17a, 17b is called a vaporization pressure regulating valve, and it demonstrates.

The same reference numerals are given to the same members as the constituent members shown in FIGS. 1 to 4, and the detailed description thereof is omitted.

First, a description will be given based on FIG.

The LPG liquid (gas liquid) Ga stored in the storage tank Ta flows into the vaporization pressure regulating valve 17a through the LPG liquid inflow pipe 13a, where it is decompressed to a constant vaporization pressure Pa. The decompressed LPG liquid Ga is vaporized by inflowing into the heat exchanger 11 of the hot water tank 10 in a state where a part of the LPG liquid is vaporized and a part is a liquid as it is (the above path is referred to as "use side" for convenience of explanation). The vaporized gas G is supplied to the consumer U through the pressure reducing valve 18.

On the other hand, the LPG liquid (gas liquid) Gb stored in the storage tank Tb flows into the vaporization pressure regulating valve 17b through the LPG liquid inflow pipe 13b, and is decompressed to a constant vaporization pressure Pb here. The reduced pressure LPG liquid Gb is evaporated by inflowing into the heat exchanger 11b of the hot water tank 10 in a state where a part of the LPG liquid is vaporized and a part is a liquid as it is (the above path is referred to as a "preliminary side" for convenience of explanation). The vaporized gas G is supplied to the consumer U through the pressure reducing valve 18.

Initially, the vaporization pressure Pa is set larger than the vaporization pressure Pb. That is, the set pressure of the vaporization pressure regulating valve 17a is made larger than the set pressure of the vaporization pressure regulating valve 17b.

In this way, when the setting of Pa> Pb causes the LPG liquid Ga and Gb to join at the inlet of the heat exchanger 11, the LPG liquid Ga from the vaporization pressure control valve 17a on the user's side with the high vaporization pressure is preferentially supplied to the LPG liquid Ga of the storage tank Ta. The LPG liquid Gb from the vaporization pressure regulating valve 17b on the preliminary side, which is first used (used) and whose vaporization pressure is set low, is not supplied and is brought into the standby state.

That is, if the amount of LPG liquid supplied is sufficient for the amount of gas consumed, and if it is within the capacity of the heat exchanger 11, the LPG liquid Ga from the vaporization pressure adjusting valve 17a on the use side flows into the heat exchanger 11 and vaporizes as gas. Consumed. On the other hand, since the high pressure (vapor pressure Pa) is applied to the output side of the preliminary vaporization pressure regulating valve 17b from the vaporizing pressure regulating valve 17a on the use side, it is in a closed state, so that LPG liquid Gb does not flow into the heat exchanger 11. .

When gas consumption proceeds in this state, the LPG liquid Ga from the vaporization pressure regulating valve 17a on the use side is preferentially consumed, and the LPG liquid Gb from the vaporization pressure regulating valve 17b on the preliminary side is not consumed.

As the gas consumption continues, the remaining amount of the LPG liquid Ga in the storage tank Ta on the use side decreases, so that the supply of the LPG liquid Ga from the vaporization pressure regulating valve 17a is reduced, so that the LPG liquid Ga suitable for the gas consumption cannot be supplied. The pressure at the outlet side of the adjustment valve 17a is lowered. When the pressure on the outlet side of the vaporization pressure regulating valve 17a is continuously lowered and becomes lower than the pressure on the output side of the vaporization pressure regulating valve 17b on the preliminary side, the supply of LPG liquid Gb also starts from the vaporization pressure regulating valve 17b on the preliminary side and the gas The lack of consumption is compensated for.

This gas supply is continued, and finally, the remaining amount of the LPG liquid Ga in the storage tank Ta on the use side is almost zero, so that only the LPG liquid Gb from the preliminary storage tank Tb is supplied. At this point, while the LPG liquid Gb is stably supplied by the storage tank Tb, the vaporization pressure Pa of the vaporization pressure regulating valve 17a on the use side is set lower than the vaporization pressure Pb of the vaporization pressure regulating valve 17b on the reserve side. That is, the set pressure of the conventional vaporization pressure regulating valves 17a and 17b is reversed.

Then, the set pressure on the outlet side of the vaporization pressure regulating valve 17a, which has been used up to now, is lower than the set pressure on the outlet side of the vaporization pressure regulating valve 17b, which has been the preliminary side until now, and the vaporization pressure regulating valve 17a is closed to the preliminary side. Is switched.

In this state, the nearly bottom reservoir Ta is replaced with another one, or a new LPG liquid Ga is filled.

Subsequently, when the LPG liquid Gb from the new reservoir Tb is supplied and the LPG liquid Gb is almost exhausted, the set pressures of the vaporization pressure regulating valves 17a and b are reversely adjusted. Switch to.

By repeating these operations, the gas can be continuously supplied without interrupting the gas supply. In addition, the LPG liquid in the storage tanks Ta and Tb can be used completely up to the bottom state, and the pressure reduction valves 17a and b can be reduced before supplying the LPG liquid to the heat exchanger 11, thereby increasing heat exchange efficiency and providing a stable vaporization device. There is an effect that can provide.

6 is a view showing another embodiment.

This embodiment differs from the embodiment in FIG. 5 in that the storage tanks Ta and Tb are provided with heat exchangers 11a and b as well as vaporization pressure regulating valves 17a and b. Actions and effects are the same as in the case of Figure 5, so a detailed description thereof will be omitted.

According to the present invention, the LPG liquid supplied from the two reservoirs is depressurized by the respective vaporization pressure regulating valves and the set pressures of the respective vaporization pressure regulating valves are changed to continuously supply the gas without interrupting the gas supply. The LPG liquor can be exchanged for another new reservoir, or a fresh LPG liquor can be charged.

In addition, since the LPG liquid can be almost exhausted without the remaining amount in the LPG liquid storage tank, there is an effect that the inconvenience of transporting the LPG liquid left in the storage tank is eliminated.

Furthermore, by employing a vaporization pressure regulating valve, the LPG liquid is depressurized before supplying it to the heat exchanger, thereby gasifying a substantial portion of the LPG liquid at this stage, and subsequently lowering the temperature of the gas and LPG liquid mixture to the heat exchanger. The efficiency can be improved. As a result, the cross-sectional area of the heat exchanger can be made small, so that the entire vaporizer can be made small and the cost of the device can be reduced.

In addition, even if the gas consumption suddenly becomes zero, the amount of LPG liquid remaining in the heat exchanger is smaller than that of the conventional vaporizer, so that the size of the heat exchanger can be reduced and the wall of the heat exchanger can be thinned. The production cost can be reduced. In addition, since the amount of remaining LPG liquid is small, the amount of gas generated is small, thereby reducing the risk of breakage of the heat exchanger due to pressure rise, thereby improving the stability of the vaporizer.

Claims (5)

The heat exchanger 11 is installed in the hot water tank 10, and the LPG liquids Ga and Gb are decompressed through the vaporization pressure regulating valves 17a and 17b connected to the plurality of storage tanks Ta, Tb and LPG inlet pipes 13a and 13b, respectively. In the vaporization apparatus to supply Initially, the outlet side pressure of the vaporization pressure control valve 17a is set higher than the outlet side pressure of the vaporization pressure control valve 17b (first setting), After that, when the LPG liquid Ga from the vaporization pressure regulating valve 17a is exhausted, the outlet side pressure of the vaporization pressure regulating valve 17b is set higher than the outlet side pressure of the vaporization pressure regulating valve 17a (second setting). doing Vaporizer, characterized in that. The method of claim 1, And when the LPG liquid of the use-side reservoir Ta is exhausted, the vaporizer is automatically switched to the reserve-side reservoir Tb by the set pressure difference between the vaporization pressure regulating valves 17a and 17b. The method of claim 1, The second setting is carried out alternately depending on the exhausted state of the LPG liquid of the storage tanks Ta and Tb. The method according to claim 1 or 2, Evaporating apparatus characterized in that to fill the LPG liquid exhausted after the second setting. The method according to claim 1 or 2, And a storage tank Ta of the LPG liquid exhausted after the second setting is replaced with a new storage tank Ta.

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