Oil and gas recovery method and device

Abstract

The invention belongs to the field of chemical engineering, and particularly discloses an oil and gas recovery method and device. The method is simple in process, mild in operation condition and low in cooling capacity consumption, efficient separation and recovery of light gasoline, heavy gasoline, C2, C3 and C4 components can be realized by using less equipment, and particularly, efficient separation and recovery of C2, C3 and C4 components can be realized. A gas phase and a liquid phase are respectively used for desulfurization and mercaptan removal, the gas phase is used for desulfurization and mercaptan removal under high pressure, the equipment size is small, the investment is low, and the desulfurization effect is good.

Description

Technical field[0001]The present invention belongs to the field of refining and chemical industry, and more particularly to a method and apparatus for oil and gas recovery, more specifically, a device in which oil and gas recovery in a process having a high gas yield such as catalytic cracking, catalytic cracking, and delay coking. method.Background technique[0002]The light hydrocarbon refers to the focus of obtaining methane, ethane, ethylene, propane, propylene, carbon, and a light hydrocarbon separation process, which is a focus of petrochemical technology. Among them, the separation process between carbon two, carbon three and carbon four is mature, and a method of distillation is usually employed. Methane is lowered by the low boiling point, and it is necessary to cool to -100 ° C and lower temperature if the amount of rectification is lowered, and it is generally used in the ethylene device, which is generally adopted in the ethylene device. Great. Therefore, the separation of...

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Problems solved by technology

[0005] (2) The absorption and stabilization system uses stable gasoline as an absorbent to recover liquefied gas components. Due to the high yield of liquefied gas components in the catalytic cracking process, gasoline is Gasoline absorbing tower, ethane deabsorbing tower and stabilizing tower are circulated, and the circulation volume is large, the temperature at the bottom of ethane desorbing tower and stabilizing tower is high, the heat load of reboiler at the bottom of the tower is relatively large, and the energy consumption is low high

[0006] (3) The entire technological process is relatively long, which increases investment and energy consumption accordingly

[0007] (4) When the recovered C2 product is sent to the separation unit of the ethylene plant, some of the heavy components such as propylene contained in the C2 product can be recovered through the ethylene separation unit; but when the recovered C2 product is sent to the downstream production of ethylbenzene , the propylene component contained in it will bring many adverse effects to the production of ethylbenzene, which will not only greatly increase the consumption of benzene, but also directly affect the quality of ethylbenzene and styrene products

Due to the low boiling point of the carbon 2 component, the separation of the carbon 2 and carbon 3 components usually requires a temperature of -5 to -20°C. For this reason, dehydration and CO removal are required 2 processing, and requires a lower temperature grade of refrigerant, the investment and energy consumption are large

[0008] (5) The existing process desulfurizes and sweetens the dry gas and liquefied gas after absorption and stabilization, H 2 S and mercaptans circulate in the entire absorption stabilization system, which may cause related corrosion problems, and there is H in the entire absorption stabilization system. 2 Possible security issues caused by S leakage

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