RU1809904C - Breather valve - Google Patents

Abstract

SUMMARY OF THE INVENTION: The connecting flange is provided with a rod, one end of which is attached to the flange, and the other to the disk - limiter installed in the tank. A mass transfer device is installed in the tank in the form of a volumetric grid, the lower part of which is mounted on the reflector disk, in its upper part there is an annular manifold for supplying oil to the grid. 2 ill.

Description

FIELD OF THE INVENTION This invention relates to refinery equipment, and in particular to the construction of breathing valves, and can be used in fixed roof tanks.

The purpose of the invention is to reduce the loss of petroleum products in tanks with fixed roofs by trapping the vapor of petroleum products from the vapor-air mixture in the process of filling the tanks.

Due to the mass transfer device in the form of a grid, irrigated by means of a ring collector with oil product pumped into the reservoir, the vapor-air mixture is cooled in the proposed breathing valve, which leads to the condensation of oil products from it and, consequently, to the entrainment of vapor of oil products.

In FIG. 1 shows a general view of a breathing valve installed in a reservoir; in Fig.2 - breathing valve, section.

The breathing valve contains a hollow body 1 with seats 2, valves for pressure 3 (for venting air cleaned of oil product vapor) and vacuum 4 (for air inlet when pumping oil product), and a connecting flange 5. Inside the flange 5, the stem 6 is installed, the upper the end of which is attached to the flange 5. and the lower - to the disk - reflector 7 installed in the tank. On the periphery of the disk-reflector 7 mounted mass transfer device in the form of a volumetric grid 8, the lower part. which is mounted on the disk-reflector 7. In the upper part of the grid 8, an annular manifold 9 is installed for supplying oil to the grid connected to the pipeline 10. for supplying oil to the tank 11. A chain 12 is attached to the bottom of the disk 7 for draining the oil into the tank.

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The breathing valve operates as follows.

When pumping oil from the tank 11, atmospheric air through the valve 3 enters the housing 1, and then through the flange 5 into the cavity formed by the reflector disk 7 and the volumetric mesh 8 of the mass transfer device. Passing through the grid 8, the air horizontally exits into the space of the reservoir 10. With this flow of air into the reservoir, there is no intensive mixing of air with the vapors located above the surface of the oil product.

When the reservoir 11 is filled, the incoming oil product displaces the vapor-air mixture through the grid 8, to which the oil product is fed through the annular manifold 9 from the pipeline 10. In this case, the vapor of the oil product entering the grid 8, irrigated by the oil product from the collector 9, is cooled, condensed, drains onto the disk-reflector 7 and through the circuit 12 into the reservoir 11. In this case, the air-vapor mixture is released from the oil product / a into the atmosphere through valve 4 leaves air cleared of hydrocarbon vapors.

Claims (1)

Thus, the use of a pressurized breathing valve with a mass transfer device installed in the tank in the form of a volumetric mesh irrigated with an annular manifold pumped into the tank by the oil product will ensure the capture of the oil product from the vapor-air mixture by condensation of its vapor during irrigation and thereby reduce the loss of oil products (in the prototype, together with air, oil vapor that is not subject to capture is displaced into the atmosphere) .; Claims: A breathing valve for a tank, comprising a hollow body with pressure and vacuum valves and a connecting flange provided with a rod, one end of which is attached to the flange and the other to a reflector disk mounted in the tank, which is different. . in that a mass transfer device is installed in the tank in the form of a volumetric yetik, the lower part of which is fixed to the reflector disk, and in its upper part there is an annular collector for supplying oil to the grid. . 5 0 5 fae. 1 petal