RU89505U1 - GAS STORAGE IN MINING - "VNIIGAZ" - Google Patents

Abstract

1. The gas storage in the mine workings, including a gas storage tank located in an underground tunnel, connected to a gas supply and extraction system, characterized in that the tunnel contains several unconnected gas storage tanks, each of which is made in the form of one or several gas holders, consisting of stacked metal pressure vessels, interconnected by pipelines and a separate pipeline with a gas supply and extraction system. ! 2. The gas storage according to claim 1, characterized in that the surface of the metal vessels and pipelines are protected from gas by a polymer coating, preventing leakage of stored gas. ! 3. The gas storage according to claim 1, characterized in that it contains several underground tunnels located at different horizons horizontally and / or vertically and / or obliquely, in which autonomous and unconnected gas holders are located.

Description

The utility model relates to the field of underground storage of gases, including natural gas, oil gas, carbon dioxide, helium and others.

The closest technical solution to the claimed utility model is an underground storage of gaseous and liquid hydrocarbons in natural artificial mines, tunnels, caves and other underground spaces using flexible polymer insulated reservoirs (hoses), containing an underground tunnel lined with a gas-tight material, a vertical trunk connecting it with a surface, a pipeline for gas injection and extraction, and a sealed plug between the pipeline and the tunnel, while the sealed lining t nnelya made of a polymer composite elastic material forming an elastic supplementary reservoir (sleeve) provided with an end flange fixed to the conduit (RF application №2006133825, priority dated 22.09.2006).

The disadvantages of this technical solution are:

- the complexity, large volume and high cost of underground work on the preparation and sealing of the walls of tunnels, as well as on the adaptation of mine workings for the installation of elastic tanks for storing gases;

- limited durability of gas storage tanks for less than 20 years, if necessary 50 years or more;

- significant losses of stored gas in the event of violations of the tightness of tanks of such a large volume;

- significant labor costs for violations of the tightness of the tanks.

The technical problem posed when creating the inventive utility model is to increase the reliability and durability of the gas storage, as well as reducing gas losses and labor costs in case of violation of the tightness of the tanks.

The solution to this problem is achieved by the fact that the gas storage in the mine workings, including the gas storage tank located in the underground tunnel, connected to the gas supply and extraction system, according to the claimed utility model, several unconnected gas storage tanks are placed in the tunnel, each of which are made in the form of one or more gas holders, consisting of stacked in a row of metal pressure vessels, interconnected by pipelines and a separate pipeline with system th supply and selection of gas. The surfaces of metal vessels and pipelines can be protected from exposure to gas by a polymer coating, which prevents leakage of stored gas. The gas storage may contain several underground tunnels located at different horizons horizontally and / or vertically and / or obliquely, in which autonomous and unconnected gas holders are located.

The proposed storage design allows, if necessary, to store in autonomous gas holders with metal vessels various gases in composition and increase their maximum pressure.

The utility model is illustrated by drawings in figure 1 and figure 2.

Figure 1 shows, as an example, a schematic diagram of the design of a new type of storage.

Figure 2 shows, by way of example, the construction of a metal vessel protected by a polymer coating.

The proposed gas storage (figure 1) includes an underground tunnel 1 connected by a vertical barrel 2 to the earth's surface. Autonomous and non-interconnected gas holders are placed in the tunnel 3. Each gas tank consists of metal vessels stacked in rows on the base (trolley) 4 and secured with tie rods 5. All the vessels of each gas tank are connected by pipelines (not shown conventionally in the figure) and separate pipelines 6 with compressors 7 mounted on the surface and designed for gas injection and extraction. Pipelines 6 are equipped with shut-off valves 8 and bends 9, equipped with taps 10 and designed to take gas from underground gas tanks 3.

A metal vessel for storing gas (Fig. 2) consists of a shell 11 made of a gas pipe (diameter up to 1420 mm and pressure up to 12.0 MPa), a blind bottom 12 is welded to one of its ends, and an adapter 13 is welded to the other end with flange 14.

If necessary, the inner surfaces of the vessels (figure 2) are covered with a special polymer material or an elastic sleeve 15. To protect against corrosion, the outer surfaces of the vessels, piping, pipelines and locking and safety devices are coated with a special anti-corrosion material.

The proposed gas storage may contain several underground tunnels located at different horizons horizontally and / or vertically and / or obliquely, in which autonomous and unconnected gas holders are placed (not shown conventionally in the figure).

The described storage operates as follows.

When injecting gas into the storage, the compressors 7 take gas from the gas pipeline 16 and feed it through open taps 8 through pipelines 6 to the corresponding vessels of the gas holders 5. At the same time, the taps 10 are closed.

When taking gas from the storage, the taps turn off the compressors 7, close 8, and the taps 10 open. Gas from gas holders 3 through pipelines 6 through branch pipes 9 and taps 10 flows through pipelines 17 to the consumer.

The proposed storage design has several advantages in comparison with the closest analogue:

- the durability of the storage facility increases and becomes commensurate with the durability of the gas field, that is, at least 50 years.

- the time, volume and laboriousness of construction and installation works are sharply reduced as a result of the use of gas tanks of full factory readiness and the almost exclusion of work on the preparation of tunnels.

- potential risks and damage are sharply reduced as a result of increased reliability of metal vessels, their relatively lower capacity and autonomy.

Preliminary calculations of the efficiency of the construction and operation of the proposed gas storage on the example of one of the worked out mines of the Kuzbass coal basin showed that the specific capital investments for the organization of one cubic meter of the geometric volume of the storage can be reduced by 20-25%, and the construction time is halved.

Claims (3)

1. The gas storage in the mine workings, including a gas storage tank located in an underground tunnel, connected to a gas supply and extraction system, characterized in that the tunnel contains several unconnected gas storage tanks, each of which is made in the form of one or several gas holders, consisting of stacked metal pressure vessels, interconnected by pipelines and a separate pipeline with a gas supply and extraction system. 2. The gas storage according to claim 1, characterized in that the surface of the metal vessels and pipelines are protected from gas by a polymer coating, preventing leakage of stored gas. 3. The gas storage according to claim 1, characterized in that it contains several underground tunnels located at different horizons horizontally and / or vertically and / or obliquely, in which autonomous and unconnected gas holders are located.