Propane and propylene separation device

Abstract

The invention discloses a propane and propylene separation device, which comprises a first dryer, a second dryer and a third dryer. A first flow control valve is arranged at a downstream position of the first dryer, a second flow control valve is arranged at a downstream position of the second dryer, and a third flow control valve is arranged at a downstream position of the third dryer. Outlets ofthe first flow control valve and the second flow control valve are mixed prior to entering a membrane component, and an outlet of the third flow control valve is connected with the membrane component. A pressure gauge and a pressure regulating valve are arranged at a downstream position of an outlet of the membrane component, a fourth flow control valve is arranged at a downstream position of theother outlet of the membrane component, and the fourth flow control valve is connected with a soap bubble flow meter and a gas chromatograph. The propane and propylene separation device is simple inoperation, low in maintenance demand and suitable for long-period operation, and efficient separation of propane / propylene mixed gas can be realized under a condition of low energy consumption.

Description

technical field [0001] The present invention relates to a kind of propylene preparation equipment, more specifically, is a kind of propane propylene separation device. Background technique [0002] With the rapid development of propylene-based products, the consumption of propylene has been greatly promoted. In my country, propylene is mainly used to produce acrylonitrile, propylene oxide and isopropanol. Its source is mainly through 3 ways: by-products of steam cracking in ethylene plants (about 68%), by-products of catalytic cracking (about 29%), and the remaining 3% are olefins produced through olefin conversion, propane dehydrogenation and methanol conversion obtained by other methods. [0003] As the reserves and production of light crude oil continue to decrease, the proportion of hydrocarbon cracking and catalytic cracking processes in propylene production continues to decrease. In addition, whether it is hydrocarbon cracking and catalytic cracking or propane dehy...

AI Technical Summary

Problems solved by technology

During the operation of the method, due to the fact that the tower top temperature is higher than 40 o C, using cooling water to condense to generate reflux, the tower kettle is heated by low-pressure steam or hot water, the equipment is simple, but due to the relatively small volatility of the two components, the reflux is relatively large and the number of trays is large

Although this technology is relatively mature, it requires high energy consumption for the separation of propylene / propane, and scientists are also looking for a new separation method to replace this traditional technology

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