Gas condenser

Abstract

Gas condenser (2) arranged to condense gas / vapour (4) evaporating from a volatile liquid (6) being stored, for example, in a storage tank. The gas / vapour (4) is conducted into a gas chamber (16) provided with openings, possibly also nozzles (76), the gas chamber (16) being placed in a surrounding housing (36). Thereafter, the gas / vapour (4) is sucked into at least one venturi section (62, 64), wherein the liquid (6), for example, is flowing with a static underpressure relative to the inflowing gas / vapour (4). Via at least one expansion section (88, 90), a mixture (92) of gas / vapour (bubbles) (4) and liquid (6) flows onward to a condensing chamber (98), through which the static pressure of the liquid (6) increases and the gas / vapour (4) is condensed, after which the mixture (92) is conducted back to, for example, the storage tank. By means of one or several adjusting devices arranged to the gas condenser (2), the shape of the slot volume of the venturi section(s) (62, 64), possibly also the slot volume of expansion section(s) (80, 90), and thus the course of pressure through it / them, may be optimally adjusted / changed / adapted to the current operating condition and the current gas condensing need.

Description

technical field [0001] The present invention relates to a device for condensing gas / vapor from a volatile liquid, which device is referred to below as a gas condenser. Background technique [0002] When storing and transporting volatile liquids such as liquid crude oil or crude oil products, a portion of the liquid normally evaporates. Gases / vapours (eg gaseous hydrocarbons) are collected above the liquid level of a storage device storing liquids (eg liquid phase hydrocarbons). The storage device may be a container or tank. This evaporation causes pressure to build up in the sealed storage device. When the pressure reaches a given maximum value, the pressure developed must be reduced by venting the gas / vapor through a suitable valve. The gas / vapor is usually released into the ambient atmosphere. [0003] When loading e.g. a storage tank with eg a hydrocarbon liquid, the tank may be partially filled with the same or similar liquid which will replace the gas / vapor in the s...

AI Technical Summary

Problems solved by technology

[0013] A substantial disadvantage of releasing gases such as hydrocarbons into the surrounding atmosphere is that the emissions can be harmful to the surrounding environment

[0016] Therefore, there is no solution in the prior art for condensing gas / vapor evaporated from a liquid that is volatile at or near atmospheric conditions, and for simply and efficiently condensing larger volumes of such gas / vapor technology

Images