RECOVERY AND RECUPERATION INSTALLATION OF HYDROCARBON VAPOR Russian patent published in 2018 - IPC B01D53/14 

FIELD: oil industry.

SUBSTANCE: present invention is intended for use in the oil-producing, petrochemical and oil refining industry in the oil and petroleum product distribution and transportation system, in particular in the field of storage, handling, processing of oil, oil products and other hydrocarbon liquids. Hydrocarbon vapor recovery and recuperation unit comprises a reservoir with a receiving pipeline, cooling unit, first and second absorption absorbers with irrigation pipelines connecting the upper parts of the absorbers to the corresponding branch pipes from the refrigeration unit, receiving gas pipeline with a gas blowing connecting the steam area of the tank to the bottom of the first stage absorber, a pump supplying the absorbent to the cooling unit, and an outlet adsorber. Unit is equipped with a capacity of the cooled absorbent communicated with the pump. Receiving gas pipeline is equipped with an additional heat exchanger equipped with a branch pipe for the drainage of water condensate, taken from hydrocarbon fumes. Output adsorber is made in two stages with the possibility of alternate operation and purging and is communicated after purging through a vacuum pump with an additional heat exchanger. First and second absorption stages are placed one above the other in one housing, the lower part communicating with the capacity of the cooled absorbent. First – the lower stage, irrigated absorbent temperature -5 °C – -10 °C, is equipped with contact nozzles with a nominal size of 60 to 35 mm with a total volume, which is 30–35 % of the total volume of the packed part, and the second stage, irrigated with an absorbent of temperature -20 °C – -42 °C, – contact nozzles with a nominal size of 24 to 12 mm. First and second stages are made with the possibility of irrigation with a cooled absorber in the proportion 1:2. Capacity of the cooled absorbent can be configured to accumulate and utilize captured hydrocarbon vapor as an absorbent of the hydrocarbon condensate. Unit of recovery and recuperation of hydrocarbon fumes through the use of a vertical single hull, combining the first and second stages of absorption, the use of an additional heat exchanger and the implementation of a separate supply of absorbent for irrigation (provided that the required degree of hydrocarbon vapor recovery is maintained) allows to reduce the metal consumption of the installation and the energy costs for heating the absorbers and regenerating the adsorbers, which ultimately leads to a reduction in the power consumption of the installation.

EFFECT: use of the hydrocarbon vapor as absorber of the captured hydrocarbon vapors from the container of the cooled absorbent expands the application area of the facility (functionality), provided that there is no or insufficient amount of absorbent in the facilities.

1 cl, 1 dwg