Gas dehydration and dealkylation method for supersonic vortex tube

Abstract

The invention relates to a gas dehydration and dealkylation method for a supersonic vortex tube, wherein the feed gas enters a separator and a filter separator to separate large particles out, the filtering separated feed gas and a dry gas are cooled in a first level gas-to-gas heat exchanger, and enter a first level prewhirling pre-nucleation supersonic vortex tube to be dehydrated after fine and small solid particles are separated out through a fine filter, and are separated into a first level dry gas and a gas-liquid mixture; the gas-liquid mixture enters a first level gas-liquid separatorto be separated; the separated gas phase flows into the first level dry gas to enter a second level gas-to-gas heat exchanger; the cooled first level dry gas enters a second level prewhirling pre-nucleation supersonic vortex tube to be dehydrated, and is separated into a second level dry gas and the gas-liquid mixture; the gas-liquid mixture enters a second level gas-liquid separator to be separated; the separated gas phase is interflowed with the second level dry gas to enter the second level gas-to-gas heat exchanger and the first level gas-to-gas heat exchanger for exchanging heat with thefirst level dry gas and the feed gas for temperature rise, and the heated dry gas is exported; and the high water dew point and blockage problems of hydrocarbon are solved, the dehydration and the dealkylation of the feed gas are realized, and a purification device is ensured to stably operate.

Description

Technical field: [0001] The invention relates to a supersonic vortex tube gas dehydration and dehydrocarbon method. Background technique: [0002] Supersonic vortex tube dehydration technology, the main research and development companies are Translang and Twister. [0003] The main patents formed are as follows: [0004] 1.《Supersonic separator apparatus and method》 [0005] (US6776825B2) [0006] 2. "Method of and apparatus for the separation of components of gas mixtures and liquefaction of a gas" [0007] (US6372019B1) [0008] 3. "Nozzle for supersonic gas flow and an inertia separator" [0009] (US6513345B1) [0010] The main supersonic vortex tube patents formed (applied) in China are as follows: [0011] 1. "Cone Core Supersonic Condensation Cyclone Separator" [0012] (CN200810011258.6) [0013] 2. "A Supersonic Swirling Condensation Combined Nozzle" [0014] (CN200610105199.X) [0015] 3. "Multi-inlet Supersonic Swirl Separation and Backpressure Device" ...

AI Technical Summary

Problems solved by technology

[0032] It can be seen from the above process flow that in order to avoid the formation of hydrates, the temperature of the natural gas before entering the supersonic vortex tube 6 cannot be lower than the hydrate formation temperature, so the gas-gas heat exchanger 4 cannot fully exchange heat and make full use of the cooling capacity

In addition, since the temperature of the feed gas in the outlet gas heat exchanger 4 cannot be lower than the hydrate formation temperature, a larger pressure difference between the inlet and outlet of the supersonic vortex tube is required to obtain a lower dew point temperature

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