Method for regenerating oil gas recovery absorption solution

Abstract

The invention discloses a method for regenerating an oil gas recovery absorption solution, which is used for desorbing light hydrocarbon absorbed by an enriched absorption solution. The oil-gas-absorbed enriched absorption solution is led into a regeneration device for regeneration; a vacuum regeneration manner is adopted; the absolute pressure for vacuum regeneration is 10-40 KPa; hydrogen or nitrogen is used as a gas-stripping medium when the vacuum regeneration is carried out; and the use amount of the gas-stripping medium is 10%-15% of the mass of the oil gas absorbed by the enriched absorption solution. Compared with the prior art, with the adoption of the method disclosed by the invention, the degree of vacuum required by the regeneration can be lowered, the power of a vacuum pump is lowered, and the investment on equipment and the energy consumption in operation can be obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of recovery and utilization of absorption liquid, in particular to the regeneration technology of rich absorption liquid which uses absorption liquid to separate gas. Background technique [0002] In the process of crude oil extraction, transportation, storage, transfer, processing and crude oil processing products (gasoline, kerosene, diesel oil, etc.) , which generally contain air and other components) escape into the atmosphere, and in some chemical solvents such as benzene, toluene, xylene production workshops, paints and other organic solvents, there are also very volatile light hydrocarbon groups with similar properties point. [0003] On the one hand, the oil and gas dissipated into the air waste a lot of energy, causing huge economic losses, and on the other hand, reduce the quality of oil products. Moreover, since the explosion limit of oil and gas is 1% to 6%, the concentration of oil and gas aro...

AI Technical Summary

Problems solved by technology

The problem with this method is that heating is not conducive to absorption, so the regenerated absorption liquid needs to be cooled to ensure the absorption effect

In this method, the absorption liquid does not need to be cooled and heated. When the vapor pressure of the absorbed component is low, in order to ensure the regeneration effect, a higher vacuum degree is required, and the actual volume of the gas under low pressure will expand to tens of times under normal pressure. times, although the pumping capacity under normal pressure conditions is low, the pumping capacity of vacuum pumps increases dozens of times under operating conditions, generally reaching four to five thousand cubic meters per hour or even greater, thus requiring larger drive equipment, Equipment investment and operating costs are high

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