RU2437027C1 - Stationary storage for liquefied natural gas - Google Patents

Abstract

FIELD: machine building. ^ SUBSTANCE: concrete rectangular container 1 wherein there is positioned cylinder horizontal reservoir of operational compatibility 3 is set under ground (or under floor of construction). Reservoir 3 is filled with natural gas and is emptied from it through pipelines with multi-purpose accessories 6 installed in well 5. Reservoir 3 is positioned in container 1 on props 2 made of material of low heat conductivity, while space between reservoir 3 and internal walls of container 1 is filled with heat insulating material 4, for example, poly-urethane. ^ EFFECT: reduced cost and time for construction and erection operations, increased time for drain-free storage of liquefied natural gas and increased reliability of operation of storages with cryogenic fuel. ^ 1 dwg

Description

The invention relates to the field of cryogenic technology and can be used as stationary storage for liquefied natural gas.

It is known about the prospects for the use of liquefied natural gas (LNG) on various types of vehicles and in the power supply of remote settlements (Melnikov A.A., Pronin E.P. Liquefied natural gas - the prospects of the Russian market. // Polimergaz Magazine, No. 2, 2000. - p. 14).

A device cryogenic tank for liquefied natural gas with a multilayer screen-vacuum insulation (Tsfasman G.Yu., Barmin N.V., Dudkin I.E. Cryogenic equipment of automobile fuel systems. // Refrigeration. No. 2, 1998. - p. .32). However, cryogenic containers with multilayer screen-vacuum insulation have a high cost.

A device for a fuel tank for an aircraft used as a cryogenic tank for liquefied natural gas is known, consisting of a main factory-made tank made of aluminum alloy and a thermal insulation layer made of polyurethane foam (Solozobov V.I., Andreev V.A. liquefied natural gas. // Gas industry. No. 10, 1999. - p. 45). However, polyurethane foam insulation requires a protective shell, and the time for drainage-free storage of LNG in a tank with such insulation is limited.

A device of a fuel tank for storing liquefied natural gas used for vehicles and stationary storage of cryogenic fuels, consisting of an inner vessel, an outer shell and a heat insulating layer of polyurethane foam located between the inner vessel and the outer shell of the tank (RF Patent No. 2262033, Bull. No. 28/10/10/2005). However, a composite material (metal-plastic, fiberglass, etc.) is used as the outer shell, which is impractical to use in underground construction.

A stationary storage facility for liquefied natural gas is known, consisting of an inner vessel made of corrosion-resistant alloys (for example, steel 12X18H10T), an outer shell made of reinforced concrete and coated with waterproofing on the outside, and also a layer of thermal insulation located between the inner vessel and the outer reinforced concrete shell (Usyukin I.P. Installations, machines and apparatuses of cryogenic technology. - M.: Light and food industry, 1982. - p. 275). However, the inner shell of the tank is assembled from separate metal sheets at the installation site of the tank, which significantly increases the time and cost of construction. Moreover, this technology and technical solutions can only be used to create large vertical cylindrical tanks for LNG storage.

The technical result that can be obtained by carrying out the invention is to reduce the cost and time of construction and installation works, increase the period of drainage-free storage of liquefied natural gas and increase the reliability of operation of storages with cryogenic fuel.

To achieve this technical result, a stationary storage for liquefied natural gas, consisting of an inner vessel made of corrosion-resistant alloys, an outer shell made of reinforced concrete and coated with waterproofing on the outside, and also a layer of insulation between the inner vessel and the outer reinforced concrete shell, is equipped with an outer shell made in the form of a reinforced concrete rectangular container, inside of which a cylindrical horizontal capacity of factory readiness is installed, p At the same time, the space between the container and the inner walls of the container is filled with insulating material (for example, polyurethane foam). The reinforced concrete container is equipped in the upper part with a separate well, isolated from the internal cavity of the container, for installing pipelines with shut-off and control valves, which allow filling and emptying of the internal container with liquefied natural gas, and the reinforced concrete container is installed underground (or under the building floor) so that the upper the part of the well covered by the lid coincides with the ground level (or floor of the structure).

The introduction of a simpler design of the outer shell in the form of a reinforced concrete rectangular container and a cylindrical, horizontal factory-built capacity installed inside the container on supports made of material with low thermal conductivity into the stationary storage for liquefied natural gas, allows to obtain a new property, which reduces the cost and time of building -installation work, as well as increasing the period of drainage-free storage of liquefied natural gas and improving the reliability of and storages with cryogenic fuel by filling the space between the container and the inner surface of the container with insulating material, placing the container underground and its equipment in the upper part with a separate well with a lid isolated from the internal cavity of the container for installing pipelines with shut-off and control valves, which ensure filling and emptying the internal tank with liquefied natural gas.

The drawing shows a stationary storage for liquefied natural gas.

The stationary storage for liquefied natural gas consists of a reinforced concrete rectangular container 1, in which cylinders, a horizontal factory-ready capacity 3, are installed on supports 2 of material with low thermal conductivity (for example, wood). The space between the capacity 3 and the inner walls of the container 1 is filled with insulating material 4 (e.g. polyurethane foam). The reinforced concrete container 1 is equipped in the upper part with a separate well 5, isolated from the inner cavity of the container 1, for installing pipelines 6 with shut-off and control valves, which allow filling and emptying of the inner tank 3 with liquefied natural gas (LNG). In this case, the reinforced concrete container 1 is installed underground (or under the floor of the structure) in such a way that the upper part of the well, closed by the lid 7, is located at ground level (or the floor of the structure).

Stationary storage for liquefied natural gas is as follows.

A reinforced concrete rectangular container 1, in which a cylindrical, horizontal factory-ready capacity 3 is located, is installed underground (or under the floor of the structure). This increases the reliability of operation of the storage due to the exclusion of damage from various damaging factors, such as a terrorist threat, etc., and also reduces external heat inflows. Through pipelines with shut-off and control valves 6 provides filling and emptying 3 of liquefied natural gas. For convenience and improving the reliability of operation, as well as reducing heat influx from the environment to the tank 3, pipelines 6 with shut-off and control valves are placed in the well 5 located in the upper part of the container 1. The well 5 is isolated from the internal cavity of the container 1. In the absence of filling processes and emptying the tank 3 from the shut-off and control valves 6 disconnect the connecting pipelines to external systems and the well 5 is closed by a lid 7 made of heat-insulating material or reinforced concrete, which also decreases heat leakage inside the container 1.

The boiling point of LNG is about 111 K. In view of this, in order to exclude heat influx to LNG and increase the duration of its drainage-free storage, tank 3 is installed in container 1 on supports 2 made of materials with low thermal conductivity, and the space between tank 3 and the inner walls of container 1 filled with heat insulating material 4, for example polyurethane foam. Thermal insulation material 4 and supports 2 also serve for more rigid fixation of the position of the container 3 in the container 1.

Information sources

1. Melnikov A.A., Pronin E.P. Liquefied natural gas - prospects for the Russian market. // Magazine "Polymergas", No. 2, 2000. - p. 14.).

2. Tsfasman G.Yu., Barmin N.V., Dudkin I.E. Cryogenic equipment for automotive fuel systems. // Refrigeration equipment. No. 2, 1998. - p. 32.

3. Solozobov V.I., Andreev V.A. Aircraft liquefied natural gas. // Gas industry. No. 10,1999. - p. 45.

4. RF patent No. 2262033, bull. No 28 on 10/10/2005

5. Usyukin I.P. Installations, machines and apparatuses of cryogenic equipment. - M.: Light and food industry, 1982. - p. 275. - prototype.

Claims (1)

Stationary storage for liquefied natural gas, consisting of an inner vessel made of corrosion-resistant alloys, an outer shell made of reinforced concrete and coated with waterproofing externally, and also a layer of thermal insulation located between the inner vessel and the outer reinforced concrete shell, characterized in that the outer shell made in the form of a reinforced concrete rectangular container, in which an inner vessel is mounted on supports from a material with low thermal conductivity (for example, wood) filled in the form of a cylindrical horizontal tank of factory readiness, while the space between the tank and the inner walls of the container is filled with insulating material (for example, polyurethane foam), and the reinforced concrete container is equipped in the upper part with a separate well for installing pipelines with shut-off and control valves, isolated from the inner cavity of the container providing refueling and emptying of the internal container with liquefied natural gas, and the reinforced concrete container is installed underground (or under the floor of the structure) in such a way that the upper part of the well, covered by a lid, is located at ground level (or the floor of the structure).