DE2237699A1 - CONTAINER SYSTEM FOR STORAGE AND / OR TRANSPORT LOW-BOILING LIQUID GASES - Google Patents

Description

LINDE AKTIENGESELLSCHAFT

(H 689) H 72/45

La / ph

July 27, 1972

Container system for the storage and / or transport of low-boiling liquid gases

The invention relates to a container system for storage and / or low boiling to transport liquefied gases with a plurality of storage container encircling isolated space and two independent management systems, one of which is one with the Fiüssigkeitsräumen and the other with the vapor spaces of the storage container in connection .. _N

It is already known within the insulated hold of tankers for liquefied natural gas, liquefied oxygen or liquefied nitrogen, bottle batteries to accommodate the low-boiling cargo to be provided with

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their liquid spaces on the one hand and with their vapor spaces on the other hand, each connected to a pipeline system, with both pipeline systems essentially within of the isolated cargo space and each only via a central one that penetrates the insulation of the cargo space Pipeline connected to the outside space of the hold in a lockable manner. While the bottle batteries are being filled Low-boiling liquid transport goods from a storage container located outside the tanker via the one with the liquid spaces of the bottle-related piping system is pumped into the bottles, the entire here Gaseous fractions escape via the piping system connected to the vapor chambers of the bottles. Vice versa When the bottles are emptied, gaseous transport material or an inert gas is transferred under a suitable delivery pressure the piping system connected to the vapor space of the bottles is pressed into the bottles, so that now stored Liquid flows off via the pipeline system connected to the liquid spaces. While transporting Eventually, liquid is evaporating via the steam piping system withdrawn while the pipeline system remains closed for the liquid.

This with regard to coping with the three operating periods on which a tanker is based, namely filling, transport

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and emptying, in and of itself simple principle of the pipeline arrangement, however, involves a considerable safety risk for the whole ship is affected by burst pipes, especially of the liquid line system, and the associated leakage of the liquid transport goods in the cargo space can not be excluded, whereby the delimiting the cargo space Material embrittled and destroyed by the thermal stresses will.

To reduce this risk, it has also been suggested that in each branch of the liquid pipeline system opening into the respective bottle directly at the bottle neck, a pipe rupture valve should be provided within the isolated hold. Through this pipe rupture valve is, in particular when emptying the cylinder batteries, the possibility created the possibility of larger quantities of the liquid gas escaping into the hold of the ■ in the event of pipe bursts Avoid the ship by closing the pipe rupture valves and thus ending the emptying process.

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It is obvious that these pipe rupture valves are the manufacture a transport ship for low-boiling liquid gases considerably more expensive, especially for ships whose hold with a variety of individual bottles ^ e.g. more than 600 bottles. Furthermore, there are considerable

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Maintenance difficulties as all burst valves are inside of the hold, which is cold in every operating state.

The invention is based on the object in a Behiliter-

Storage and / or
system for / transport of low-boiling liquid gases with several independent storage containers, especially in a tanker, to develop a device that empties a rislkolosec. Filling and transporting the cryogenic storage medium enables

The object is achieved in that the line systems interlock are arranged, and daii the internal piping system with the fluid spaces and the external pipe system the D mpfräuinen of the storage tank is in connection.

This inventive arrangement of the pipeline systems e.g. over the storage tanks is easy and therefore cheap to do and reduces the risk of malfunctions, especially broken pipes, during the three operating periods Filling, transport and emptying considerably without there being additional valves within the isolated space the pipeline systems' would be required.

While the storage tank is being filled, ζ.3. of the tanker, becomes liquid. E.g. from one arranged on the land side

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ten storage container, over the inside of the two into one another arranged line systems are pumped into the individual storage tanks, with all of the gaseous portions occurring via the outer of the two nested Line systems that according to the invention with the steam chambers of Storage tank is connected, flow back and optionally be fed back to a liquefaction plant. If the liquid line system breaks in such an arrangement, then some of the conveyed flow will now flow Amount of liquid directly into the external pipeline system and from there also into the container, since gaseous fractions in the external pipe system are practical during filling be conveyed without pressure. By the invention Arrangement of the pipeline systems therefore flows, contrary to the prior art, in the event of a break in the liquid pipeline system no liquid has yet entered the hold of the tanker. If the external pipeline system breaks, gas will flow into it the hold and is registered here by a gas analyzer arranged within the hold, the gas analyzer now an I ..: pulse is generated, which already closes the "interior of the two pipe systems lying one inside the other." arranged outside the hold. In the event that, however, it is relatively unlikely that both pipeline systems should break during filling, gas also enters the hold while the liquid initially only enters the

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outer pipeline system flows, is distributed there and not or, depending on the location of the leak, only to a small extent also in the hold leaks, while most of the leaking liquid is due to the defect in the outer pipe despite the defect of the slope still flows to the storage tanks. The gas analyzer now also causes the internal ones to close immediately Liquid line. Leakage gas that occurs in the hold is released into the open via a drain chimney.

When the storage container is emptied as a further operating state, compressed gas, preferably vaporized storage medium, is used or a suitable inert gas, via the exterior of the invention arranged piping systems pressed into the vapor space of the storage container while the stored Liquid escapes through the internal piping system. If the inner pipeline system breaks during this operating state, additional gas enters the liquid line a, so that in the event of only a very small leak there is only a reduced delivery rate while in the case of larger leaks due to the pressure equalization taking place between the two pipeline systems eventually comes to a standstill. But here too it is very important that no liquid penetrates into the hold of the tanker. In the event of a break in the external pipeline system as well as in the event that both pipeline systems

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breaking stars, this already applies to the operating period of the Filling said, with the difference that now the gas analyzer the shut-off of the external pipeline system, i.e. the pressurized gas line, causes. Gas entering the hold is also now drawn off via the steam chimney.

During the last operating period, the transport, the inner piping system is shut off, while the storage part is evaporated via the steam line to the outside and is either heated or drained there. In the event of a break · either of the inner or the inner and the outer pipeline system, the liquid content of the storage tank remains unaffected.

A particularly advantageous variant of the storage system according to the invention, which is of particular importance with regard to tankers, is supported by the pipeline systems according to the invention to be arranged not above, but in the upper area of the storage container, the storage container, in each case from the according to the invention penetrated pipeline systems lying inside one another will. The connection points of the gas line with the steam rooms and the liquid line with the respective, the connections to the fluid spaces producing branch lines within the storage tanks in their upper Area provided. Overall, this enables according to the invention Variant thus a better use of the isolated space, in

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which the storage containers are housed. Furthermore, that the outer pipeline system at the penetration points or joints through or on the container walls is firmly connected to these, a fixed connection between the containers is established via the external piping system, as a result, there is no need for additional fastening of the storage containers to one another.

Instead of all storage tanks on a common pipeline system consisting of two pipelines lying one inside the other it can also be an advantage, e.g. for a Piasch ship with a large number of individual bottles, several To combine bottles into groups and only one common embodiment designed according to the invention for each bottle group Provide piping system. In the event of pipe bursts, only the affected bottle group was required to be turned off.

Although the subject matter of the invention relates primarily to a tanker, and therefore essentially on Example of a tanker is described, it can of course also be used in other cases. Always when the task at hand is to fill or empty several containers for low-boiling liquid oases, it is of great advantage the piping systems required for this into a single one

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Pipeline system with two pipelines lying one inside the other to summarize, wherein it is essential to arrange the liquid line within the vapor line;

The figures in FIG denan exemplary embodiments of tankers according to the invention are shown schematically in longitudinal section. ·

Show it:

Fig. 1 shows an arrangement, wherein the nested pipeline systems are arranged above the bottles.

Flg. 2 shows an arrangement in which the pipeline systems lying one inside the other are arranged in the upper area of the bottles.

FIG. 1 shows five storage bottles, 1, 2, 3 * ^ * 5 $, combined to form a group of bottles, which are arranged in the interior of a closed loading space 8 delimited by insulated walls 6 and 7. Each bottle is connected to a pipeline system arranged above the storage bottles with an inner line 9 and an outer line 10, the inner line 9, which serves to convey the liquid, being provided with branch lines 11, 12, 13, 14, 15. which lead into the liquid spaces of the bottles and close to the bottom

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open rich in every bottle. The outer piping system 10 serves to guide steam and is directly connected to the upper end of the storage space of each bottle, i.e. with the steam space, tied together. Both in the outer steam line 10 and in the inner liquid line 9 of the pipeline system are outside of the hold δ shut-off valves 16 and provided, which are controllably connected to a gas analyzer 18 arranged within the cargo space. An additional Safety valve 19 is used to protect against unforeseen overpressure in the gas line.

In contrast to FIG. 1, FIG. 2 shows the same parts of the device with the same reference numerals as in FIG. 2

are provided, the line system according to the invention, consisting of an inner pipe 9, the liquid pipe, and an outer pipe 10, the gas pipe, is arranged in the upper region of the bottles 1, 2, 3, 4, 5. Each bottle is penetrated by both pipelines, the connection points of the pipelines with the vapor spaces and the branch lines 11-12, 13-13 and 15, which establish the connection to the liquid spaces, being within the upper region of the vapor spaces of the bottles. The outer pipeline is here firmly welded to the jackets of the bottles at the penetration points 26, 25, 24, 23, 22, 21, 20 and 29 or at the joint 27, so that a stable

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Connection between the individual bottles is established. *

-3 claims
2 sheets of drawings

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Claims (3)

LINDE AKTIENGESELLSCHAFT (H 689) ΛH j July 27th, 1972 Patent claims 1.JBehältersystem for the storage and / or transport of low-boiling liquefied gases with a number of storage tanks containing isolated space and two independent pipe systems, one of which with the liquid spaces and the other with the vapor spaces of the storage tanks is in connection, characterized in that the line systems lie one inside the other and that the inner Line system (9) with the liquid spaces and the outer line system (10) with the vapor spaces of the storage container (1, 2, 3, 4, 5 *) Connects. 2. Container system according to claim 1, characterized in that the pipeline systems (9 * 10) lying one inside the other penetrate upper areas of the storage container and that the outer piping system (10) at the penetration parts (29 * 20, 21, 22, 23, 24, 25, 26) or at the joints (27) is connected to the container walls in a gas-tight and force-fitting manner through or onto the container walls. 3. Container system according to claims 1 and 2 thereby marked 409808/0047 LINDE AKTIENP ^ ELLSCHAFT shows that inside the room (8) a gas analyzer (l8) is arranged, which is controllable both with an outside of the space (8) in the inner (9) of the pipeline systems lying one inside the other as well as with a shut-off element (17 * l6) arranged in the outer (10) of the pipeline systems is. 409808/004