Method and device for removing water and heavy hydrocarbons from shale gas

Abstract

The invention discloses a method for removing water and heavy hydrocarbons from shale gas. The method comprises two parts including a process for removing the water and the heavy hydrocarbons and a process for treatment of the heavy hydrocarbons. The process for removing the water and the heavy hydrocarbons comprises: low-temperature removal of the water and the heavy hydrocarbons from the shale gas in a three-phase separator by use of triglycol, and regeneration of the water absorbed triglycol in a regeneration tower. The process for the treatment of the heavy hydrocarbons comprises: separation of residual C1, C2 and other light components, in a dethanizing column, from heavy components that are heavier than C3 in the shale gas, and separation of the heavy components that are heavier than C3 in a rectifying tower to obtain LPG and light oil. Through use of the method, the C1, C2 and other light components are obtained and at the same time the LPG and light oil are obtained as by-products. Process routes are advanced, and the cold-hot fluid heat-transfer route is reasonable in design, can realize the reasonable matching of cold quantity and heat quantity of fluids, so that the energy consumption of the device is reduced as low as possible.

Description

technical field [0001] The invention provides a method and device for dehydrating and removing heavy hydrocarbons from shale gas, which removes water and heavy hydrocarbons from shale gas containing water and heavy hydrocarbons, and can also by-produce liquefied petroleum gas (LPG) and light oil products . Background technique [0002] Shale gas is natural gas extracted from shale formations. The world's shale gas resources are 457 trillion cubic meters, which is equivalent to conventional natural gas resources. Among them, the technically recoverable resources of shale gas are 187 trillion cubic meters. Great value and great potential for development. However, as an emerging unconventional energy source, shale gas has relatively few processing technologies. With the development of new energy sources, the demand for the development of shale gas processing technologies is also increasing. Because the composition of shale gas varies greatly, that is, the content of moisture ...

AI Technical Summary

Problems solved by technology

Because the composition of shale gas varies greatly, that is, the content of moisture and heavy hydrocarbons in shale gas at different production points in a small area varies greatly, making it difficult to purify shale gas with existing equipment

In view of the large difference in composition between shale gas and ordinary natural gas, it is impossible to obtain qualified natural gas from shale gas by using the existing processing methods and devices for ordinary natural gas to process shale gas

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