JPH07289880A - Liquefied gas feeder - Google Patents

Abstract

PURPOSE:To provide a liquefied gas feeder capable of stably supplying a liquefied gas even if a liquefied gas storage tank is inclined. CONSTITUTION:A feed line L4 provided with a feed evaporator 1 is connected to the front bottom of a liquefied gas storage tank C and a self-evaporating line L1 furnished with a self-pressurizing evaporator 2 to the rear bottom. The line L1 is communicated with the upper part of the tank C and with the feed line L4 respectively through communicating lines L3 and L2. When the tank C is not inclined, the liquefied gas gasified in the evaporator 2 is returned to the tank C through the lines L1 and L3 and pressurized, and the liquefied gas in the tank C is sent to the feed line L4, gasified in the evaporator 1 and supplied. For example, when the tank C is inclined backward, the liquefied gas is gasified in the evaporator 2 to pressurize the inside of the tank C through the lines L1 and L2 and supplied to the feed line L4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquefied gas supply device, and more particularly to a liquefied gas supply device in an inclined liquefied gas storage tank.

[0002]

2. Description of the Related Art Liquefied gas in conventional liquefied gas storage equipment
An example of the gas supply system is shown in FIG. Smell in Figure 4
C is a heat-insulated liquefied gas storage tank, from the bottom of which
Supply line L _FourHas been led. Supply line L_FourTo accompany
The supply evaporator 1 is provided and the storage tank C to the supply line L_FourLed to
The liquefied gas thus vaporized is vaporized and supplied by the supply evaporator 1.
It Meanwhile, the supply line L_FourBetween the upper part of storage tank C and
Own pressure line L_FiveSelf-pressurizing line L_FiveIn
A self-pressurizing evaporator 3 is provided.

In the liquefied gas supply device thus constructed, a part of the liquefied gas introduced from the liquefied gas storage tank C to the supply line L ₄ is vaporized by the self-pressurizing evaporator 3 and the self-pressurizing line L _{5 is} supplied. Return to liquefied gas storage tank C by
By pressurizing the inside, the liquefied gas is pressure-fed to the supply line L ₄ . Such a self-pressurized liquefied gas supply device has already been used.

[0004]

The self-pressurized liquefied gas supply device described above has a high system reliability and is capable of supplying a stable liquefied gas, and therefore has a large track record in liquefied gas storage facilities on land. However, when the liquefied gas storage tank can take a tilted posture due to, for example, being mounted on a ship, the liquid level may not reach the supply port as shown in FIG. 5, and stable supply of the liquefied gas from the storage tank cannot be expected.

Considering the needs of liquefied gas in various situations, it is necessary to provide a liquefied gas supply facility capable of stably supplying the liquefied gas even when the storage tank is tilted. An object of the present invention is to provide a liquefied gas supply device that can stably supply liquefied gas in a liquefied gas storage tank even if the liquefied gas storage tank is inclined.

[0006]

In order to solve the above problems in a liquefied gas supply apparatus, the present invention provides a supply line having a supply evaporator on one of the bottoms of storage tanks that are vertically positioned when tilted, and On the other side of the bottom of the storage tank, which is sometimes positioned up and down, a self-evaporation line having a self-pressurizing evaporator having the same capacity as the supply evaporator is provided. This self-evaporation line communicates with the upper part of the liquefied gas storage tank and the supply line.

[0007]

In the liquefied gas supply apparatus according to the present invention, since the supply line is provided on one side of the storage tank bottom portion which is vertically positioned when tilted, and the self-evaporation line is provided on the other side, the bottom portion of the side where the supply line is connected is at the lower position. When the storage tank is tilted so that the liquefied gas in the storage tank is guided to the supply line by its head pressure, it is vaporized and supplied by the supply evaporator provided in the supply line.

On the other hand, when the storage tank is tilted so that the bottom of the side where the self-evaporation line communicates is at the lower position, the liquefied gas in the storage tank flows into the self-evaporation line and is provided in the self-evaporation line. Further, it is vaporized by the self-pressurizing evaporator having the same capacity as the supply evaporator and is supplied through the supply line. In this way, it becomes possible to supply the liquefied gas from the storage tank in the inclined state, which cannot be supplied by the conventional device.

When the liquefied gas storage tank is not tilted, the liquefied gas in the storage tank is returned to the storage tank by being vaporized by the self-pressurizing evaporator, and the liquefied gas in the storage tank is pressurized. Liquefied gas in the storage tank is pumped to the supply line.
The liquefied gas flowing out to the supply line is vaporized and supplied by the supply evaporator of the supply line.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquefied gas supply device according to the present invention is shown in FIG.
-Specific description will be made based on the embodiment shown in FIG.
1 to 3, the same parts as those shown in FIGS. 4 and 5 are designated by the same reference numerals, and a duplicate description thereof will be omitted. The embodiment shown in FIGS. 1 to 3 is one in which the present invention is applied to a liquefied gas supply device in a liquefied gas storage tank in which the liquefied gas storage tank C is inclined forward and backward.

In FIG. 1, a supply line L ₄ provided with a supply evaporator 1 is connected to the front bottom of the liquefied gas storage tank C. On the other hand, a self-evaporation line L ₁ provided with a self-pressurizing evaporator 2 is connected to the rear bottom of the liquefied gas storage tank C.

The self-evaporation line L ₁ is connected to the upper part of the storage tank C by a communication line L ₃ and the supply line L ₄ by a communication line L ₂ . The scale of the self-pressurizing evaporator 2, that is, the heating capacity is the same as that of the supplying evaporator 1.

In the liquefied gas supply apparatus of FIG. 1 having the above-described structure, L is L in the normal state where the storage tank is not inclined.
₁ → L ₃ line is used to vaporize the liquefied gas in the self-pressurizing evaporator 2 and return it into the storage tank C to pressurize the liquefied gas in the storage tank and send the liquefied gas under pressure to the supply line L ₄ for supply evaporation. It is vaporized and supplied by the vessel 1.

When tilted rearward, as shown in FIG.₁→ L
₂Evaporator for supplying liquefied gas in storage tank C using the line
Evaporate and vaporize with a self-pressurizing evaporator 2 of the same scale as 1.
Part of the liquefied gas is returned to the storage tank C to pressurize the storage tank.
Along with the rest, contact line L ₂Via the supply line L_FourWhat
Send and supply.

On the other hand, when the storage tank C is tilted forward, the storage tank C is
The liquefied gas in the inside is sent to the supply evaporator 1 by the head pressure of the liquefied gas as shown in FIG. 3 to be vaporized and sent under pressure. Even in such an inclined posture, stable supply is possible.

[0016]

According to the liquefied gas supply device of the present invention, a supply line having a supply evaporator on one side of the bottom of the storage tank at upper and lower positions when tilting, and a self-capacity of the same capacity as the supply evaporator on the other side. Since the self-evaporation line having the pressurizing evaporator is provided, it is possible to stably supply the liquefied gas through the supply line or the self-evaporation line, whichever of the storage tanks is lower.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a liquefied gas supply device according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing an operating state when the storage tank is tilted rearward in the liquefied gas supply device shown in FIG.

FIG. 3 is an explanatory diagram showing an operating state when the storage tank is tilted forward in the liquefied gas supply device shown in FIG. 1.

FIG. 4 is a configuration diagram of a conventional liquefied gas supply device.

5 is an explanatory diagram showing an operating state when the liquefied gas supply device shown in FIG. 4 is inclined rearward.

[Explanation of symbols]

1 Evaporator for supply 2 Evaporator for self-pressurization C Liquefied gas storage tank L ₁ Self-evaporation line L ₂ Communication line L ₃ Communication line L ₄ Supply line

Claims (1)

[Claims] 1. A supply line having a supply evaporator is provided on one of the storage tank bottoms that are vertically positioned when tilted, and the same capacity as the supply evaporator is provided on the other storage tank bottom that is vertically positioned when tilted. A liquefied gas supply device having a self-evaporation line having an evaporator for self-pressurization.