Method and device for removing hydrogen sulfide in shale gas with high sulfur content

Abstract

The invention relates to a method and device for removing hydrogen sulfide in shale gas with high sulfur content, and particularly relates to a method for removing hydrogen sulfide in shale gas with high sulfur content. The method comprises the following steps of (1) filtering and separating the shale gas with high sulfur content to remove contained solid particles and liquid drops in the shale gas; (2) sequentially carrying out primary amine desulfuration and secondary amine desulfuration on the filtered shale gas with high sulfur content, wherein the desulfuration process intensification and amine solution removal coupling operation is realized by using a rotational flow field provided by a micro rotational flow in an amine desulfuration process, and a desulfurized shale gas product which does not contain amine liquid drops is obtained; (3) carrying out flash distillation on an amine rich solution to remove light hydrocarbon, and then, regenerating an amine solution to ensure that the amine solution can be recycled, wherein the amine solution is obtained in the amine desulfuration process. The invention also provides a device for removing hydrogen sulfide in shale gas with high sulfur content.

Description

technical field [0001] The invention belongs to the field of chemical environmental protection, and relates to a method and a device for removing hydrogen sulfide from high-sulfur shale gas. Background technique [0002] Shale gas, mainly methane, is a clean energy source. As an unconventional natural gas, it has attracted widespread attention from various countries. With the continuous improvement of horizontal well and fracturing technology, the exploration and development of shale gas is booming. At the same time, with the large-scale development in the United States, shale gas has become a hot spot in the world's energy field. my country's recoverable shale gas reserves reach 2.508 billion cubic meters, ranking first in the world. In the medium and long term, shale gas will provide China with sufficient energy. [0003] According to the investigation of China's shale gas field by the Natural Resources Defense Council of the United States, my country's shale formations ...

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Problems solved by technology

These patent applications have fully considered the recovery of amine liquid or the purification of gas by gas-liquid micro-cyclone separation, but the overall process cannot meet the new requirements for operational flexibility and desulfurization accuracy due to the high-sulfur characteristics of high-sulfur shale gas

[0010] The above patent documents only refer to methods and devices for low-sulfur shale gas treatment and natural gas treatment. There are no patent documents related to the treatment of high-sulfur shale gas in some gas fields in my country, and the current domestic patent applications for shale gas are limited to In terms of development and production increase, it has not been involved in the application of shale gas treatment

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