Supersonic-speed low-temperature separating device and crude oil stabilizing and light hydrocarbon recovering method and device

Abstract

The invention discloses a supersonic-speed low-temperature separating device and a crude oil stabilizing and light hydrocarbon recovering method and device. The supersonic-speed low-temperature separating device comprises a crude oil heat exchanger, a flash tank, a pumping compressor, an air cooler, a heat exchanger, a separator, a separating device and a secondary separator. The crude oil heat exchanger heats introduced crude oil at the heating temperature smaller than 50 DEG C, the heated crude oil enters the flash tank, the pumping compressor pumps and compresses gas in the flash tank and makes the gas enter the air cooler, the air cooler cools the input gas, the gas then enters the heat exchanger, the heat exchanger cools an input medium through part of low-temperature gas separated bythe separating device, the cooled medium enters the separator to be primarily separated, a primarily-separated gas phase in the separator enters the separating device for supersonic-speed separation,condensate is collected in a circular seam of the separating device, and part of low-temperature gas separated by the separating device flows back to the flash tank for pressure adjusting.

Description

technical field [0001] The invention relates to a crude oil stabilization and light hydrocarbon recovery method. Background technique [0002] During the transportation and storage of crude oil, due to the low boiling point of light hydrocarbon components, they are highly volatile. When the temperature of the crude oil storage tank rises, the vapor pressure of the top of the tank increases, and a large amount of light hydrocarbons are volatilized and then discharged through the breathing valve, resulting in Waste of resources and environmental pollution. [0003] At present, there are few methods for crude oil stabilization and light hydrocarbon recovery. The reasons are as follows: [0004] (1) The volatile gas volume of the crude oil storage tank is unstable and fluctuates greatly, and the requirements for recovery equipment are relatively high. [0005] (2) The inlet of the compressor is connected to the crude oil storage tank. When the compressor is working normally, t...

AI Technical Summary

Problems solved by technology

Using the condensation method alone requires a very low cooling temperature to recover the C3+ component, so the equipment cost and operation cost are too high, which is extremely uneconomical

In engineering, the condensation method is often used as a pretreatment process in the recovery and purification process to reduce the investment cost of post-treatment, and then use post-treatment processes such as adsorption and membrane separation, but the investment and operating costs of post-treatment processes such as adsorption and membrane separation are not high. Fei, especially the increase of the post-processing process, making the process longer and more troublesome for operation management

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