RU82685U1 - CONTROLLED AIR CAMERA - Google Patents

Abstract

The controlled air chamber, which is a sealed air shell, characterized in that: the controlled air chamber has a corrugated shape; ! between the corrugated controlled air chamber and the wall of the tank is a porous material; ! in the lower part of the controlled air chamber between the air shell and the walls of the tank is installed a sealing shutter; ! nitrogen is used as a working gas in a controlled air chamber.

Description

The utility model relates to methods that reduce evaporation losses when stored in a container of easily volatile liquids.

Known devices (Metal structures. Volume 3. Special structures and structures. Edited by V.V. Gorev. - M .: Higher school, 1999) installed in the tank, which provide a reduction in oil product losses (hereinafter in the text) the concept of oil and oil product will be combined under the general name liquid), for example, such as a floating roof and a pontoon. Known devices (patent for the invention No. 2305655 published September 10, 2007) controlled air chamber, which is a sphere-shaped air cushion consisting of several layers, where each subsequent is located on top of the previous one.

The disadvantages are that the construction of a floating roof or pontoon is a rather expensive undertaking and ineffective in areas with high rainfall. The closest in technical essence and the achieved positive effect to the proposed utility model is the device of a universal controlled air chamber (patent for invention No. 2305655 published September 10, 2007), which is installed in the tank, has a sphere shape and is filled with air, replacing the missing amount of liquid.

The purpose of the universal controlled air chamber is to minimize the gas space above the oil product by replacing the missing liquid with air and thereby reduce evaporation losses. The disadvantages of this method include the fact that the invention has a sphere-shaped air cushion, which creates an additional stress state in the material, since the liquid, under conditions of gravity of the earth, always occupies a horizontal position, thereby acting on the air cushion, and in the tank

large capacity, due to these reasons, the device managed air chamber of this design is not possible. The air chamber is filled with air, which in the event of a loss of tightness of the cushion forms an explosive mixture with oil vapor, which the check valve, due to its low throughput, is not able to quickly remove from the tank, thereby creating an emergency situation that can lead to an explosion.

The claimed utility model differs from its close analogue in that the controlled air chamber is made in the form of an “accordion” (corrugated), is able to easily change its volume, keeping the liquid in a stationary state, mainly in a horizontal position, which does not create additional stresses in the air chamber material and reservoir.

The difference is that in the lower part of the controlled air chamber (Fig. 1, item 4), a shutter is installed between the air chamber and the walls of the tank, its task is to create the direction of the air shell during its movement so as to prevent distortion of its lower part.

The difference is that instead of air, nitrogen is pumped into the controlled air chamber from a nearby container with a compressor. When lowering the shell, the opposite effect occurs. Nitrogen, in case of loss of tightness of the air chamber, does not form an explosive mixture with air, which increases the level of fire and explosion safety of the tank.

The difference is that between the corrugated controlled air chamber and the tank wall there is a porous material that is saturated during filling with the stored liquid and prevents the accumulation of vapors in the space between the wall and the shell, while not interfering with the movement of the controlled air chamber.

The technical result achieved by the implementation of the claimed utility model is to reduce losses of oil from

evaporation during the "breathing" of the tank. The specified technical result is achieved by the device controlled air chamber, which is a sealed corrugated air shell, which is able to change its volume with a change in pressure in it (figure 1, figure 2). This is achieved by inflating and lowering the air envelope with nitrogen, made of oil-resistant material, by a compressor.

Figure 1 and figure 2 shows a simplified diagram of the tank. It includes: 1 - reservoir, 2 - corrugated controllable air chamber, 3 - sensor system, 4 - sealing shutter, 5 - porous material, 6 - oil product.

When the reservoir is filled with liquid (FIG. 1), the controlled air chamber 2 is located on the surface of the fluid 6, adjacent to the roof of the reservoir. When liquid is taken from the reservoir, a vacuum is formed, which is eliminated by inflating the controlled air chamber with nitrogen. A controlled air chamber, in this case, completely replaces the missing amount of liquid (replaces it) and prevents the formation of evaporation (figure 2). The air chamber can also regulate the pressure of the substance stored in the tank and, by increasing the pressure, carry out the selection of liquid without the use of special pumps.

Inflating / lowering of the controlled air chamber will be carried out using a compressor installed near the tank with nitrogen from a nearby tank.

Claims (1)

Controlled air chamber, which is a sealed air shell, characterized in that:  controlled air chamber has a corrugated shape;  between the corrugated controlled air chamber and the wall of the tank is a porous material;  in the lower part of the controlled air chamber between the air shell and the walls of the tank is installed a sealing shutter; nitrogen is used as a working gas in a controlled air chamber.