JPS58146799A - Underground tank for storing low temperature liquefied gas - Google Patents

Abstract

PURPOSE:To prevent an underground tank from intrusion of underground along joint portions with a relatively simple constitutional means by separating tank side wall portions from a bottom plate to lay a piping for circulating heat exchanging medium for freezing along joint portions between said wall portions and bottom plate. CONSTITUTION:Tank side walls 12 are separated from a bottom plate, and a piping 14 for circulating heat exchanging medium for freezing along joints between said wall portions 12 and the bottom plate 16 is laid. When underground water tends to intrude into the tank through the joints while the underground tank is free from liquid, the liquid for freezing is circulated in the piping 14 to freeze fixedly water which has entered the joints. Thus, water frozen and fixed will function as a firm seal material so that the intrusion of underground water can be positively blocked even without conventional low water level running.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a round underground tank for storing low temperature liquefied gas such as LjllGt.

The underground tank of this bridge is constituted by two amm electric and electric submersible sections 16 each having sufficient thickness and equipment, as shown in FIG. 1, for example. In the illustrated example, the ngm part 12 is constructed using a reverse winding method or the like along the inside of the continuous underground*10.
A will be rebuilt. The round bottom 11xs is structurally side wall part t2.
It is configured separately from IE 臘16 and 1lII 11 part 1! A steel material, a shoelace, a water stop plate, etc. are interposed between the ground part of the tank and the inner surface of the tank, which is made up of the mounting plate l and lll1@tg. A cold insulation material layer 11 covers the metal body, and a tank inner layer S is provided inside the cold insulation wJl1 mouth.Here, what separates the aI part 16 and the @@1g structurally is , for example, to reduce the strain applied to the tank due to earthquakes, etc., it is a way to increase structural flexibility * I!
Y:...! E'i[W is constructed with a different reinforcing structure from that of Quest@@12. Of course, various water stopping means are used at the threshold of 16.

However, the groundwater pressure in the area is very low.
This round underground tank is completed! The condition before IIK liquefied gas is stored or the tank is temporarily 9! II
With K-natsumaru-shaped matte, it is not possible to avoid underground water intrusion from the ground. The water pressure will be reduced by pumping up the groundwater below the bottom slab. So-called low water level! I had to make one turn. This low water level diversion involves pumping up groundwater and reducing groundwater pressure, so it is a very large-scale and troublesome process.

This invention has been made in consideration of the above-mentioned conventional problems, and its purpose is to improve the threshold joint between the bottom plate and the bottom part of the tank in the above-mentioned underground tank for storing low-temperature liquefied gas. groundwater infiltration along the
To provide a tank for storage of low-temperature liquefied gas, which can be reliably prevented by relatively simple construction means without carrying out a large-scale and uniform low water level operation.

In order to achieve the above object, the present invention provides an F tank for a low-temperature liquefied waste storage station with a bottom plate of the tank fII4I.
In addition to being configured separately from the tank@wall in terms of fI,
It is characterized in that piping for circulating the freezing IIA exchange medium is installed along the joint between the sage plate and the side wall of the tank.

Preferred actual flying meat of the present invention will be explained below with reference to the drawing [4].

In each figure, the same symbol as r is used for the corresponding part.

First, the actual underground tank capacity is as shown in Figure 1, with a continuous underground wall of 10. Side wall portion 12. Bottom plate 16 4. It consists of two parts. The bottom @16 is strengthened using a different reinforcement method from that of the g4 wall portion 12, and is structurally separated from the solidification s12. Here, in this invention, as a part of which is shown in Fig. m2, a distribution f14 is installed along the joint between the bottom plate 16 and the side wall part 12, in which the #lIy exchange medium for freezing is mixed. There is. For example, the pipe 14 is configured to receive, for example, solid-a element and a freezing liquid from the old gas station for ironworks from the ground.

Now, in the Kuji F tank, which is constructed as described above, until the acclimatization scum is stored there, in the dark when it is 1 x 1 or 9 yen, the ground water flows from the eye part A to various stops. Attempts to enter the tank by passing through the water chamber. In such a situation, if the gap introduction case is inserted into the pipe 14, the water that has entered the joint will be fixed and fixed. In addition to preventing the movement of water, the 711 [Ni fixed and water running material] now functions as a tough sealing material, thereby preventing the infiltration of groundwater without the need for conventional low water level operation. If low-temperature liquefied gas such as LNG is stored in a tank, the elongation will be reduced to the point where the frozen field at the joint is maintained by the storage R'@electricity. , a heat exchanger for freezing is added to the pipe 14 at 0j11.
There will be no need to do so. t, bottom plate 16 and 14 wall part 12
14, [Mizune Me9, 4sa, which absorbs the distortion of the tank caused by the ground, etc., is created because it has a structure that is structurally independent and is sandwiched in a manner similar to that of a quartet.
It is also possible to secure target clearance.

As mentioned above, this underground tank for low-temperature liquefied gas storage by @ Ming does not require low-water level operation that is unsavory and tedious as in the past, but instead uses only a relatively 3-width component. It is possible to reliably prevent the infiltration of underground water.

This also makes it possible to install a water stopper at the joint as in the conventional method, and the #II structure of the tank can be made even simpler, with an adjoining 7Z%.

[Brief explanation of the drawing]

The first figure is a cross section showing one row of a conventional low-temperature liquefied gas storage site, and Figure 2 is a section showing a part of an underground tank for low-temperature liquefied gas storage according to the present invention. It is a fr side view. IO......Continuous underground wall 12...4*# 14...Freezing pipe 16... ! E version, #11......Yureishi 1-Addition...
...tank inner layer agent 9f buju - color Ken width

Claims (1)

[Claims] In an underground tank for storing low-temperature liquefied gas, the tank OI
I 臘 is constructed by separating it from a part of the structure @ Kfin side, and piping is installed to circulate the heat exchanger for freezing cord along mII 臘, tank 1III part and 11 part of 0rI4. An underground tank for a low-temperature liquefied gas storage station.