Super-gravity type desulfurization and decarburization device integrating hydrate method and membrane method

Abstract

The invention belongs to the field of natural gas curing separation, and in particular relates to a device for desulfurizing and decarburizing industrial flue gases, oilfield exploitation gases and gases generated in other processes by combining a hydrate method with a membrane method and introducing a super-gravity technology. By combining the hydrate method with the membrane method and introducing the super-gravity technology based thereon to perform deep desulfurization and deacidification on natural gas, the removal rates of acid gases including H2S and CO2 in the natural gas are greatly improved, so that the device can be applied to purification and separation of onshore and marine oilfield natural gases, particularly the treatment of natural gases in remote districts and certain small gas fields; and the device can be used for removing the acid gases including H2S and CO2 in the natural gases effectively to ensure that the natural gases reach a pipeline transportation standard.

Description

technical field [0001] The invention belongs to the field of solidification and separation of natural gas, and here refers to a device for desulfurization and deacidification of gas in the process of industrial flue gas and oil field exploitation gas by combining the hydrate method with the membrane method and introducing the supergravity technology. The device can be used Purification and separation of natural gas in onshore and offshore oil and gas fields, especially for natural gas treatment in remote areas and some small gas fields, can efficiently remove H in natural gas 2 S and CO 2 Wait for the acid gas to make it meet the pipeline transportation standard. Background technique [0002] Natural gas extracted from oil and gas fields is mainly composed of hydrocarbons and a variety of impurity gases, the main component of which is methane, in addition to H 2 S, organic sulfur, CO 2 etc. The existence of these acidic substances will not only corrode pipelines and equip...

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Problems solved by technology

[0002] Natural gas extracted from oil and gas fields is mainly composed of hydrocarbons and a variety of impurity gases, the main component of which is methane, in addition to H 2 S, organic sulfur, CO 2 etc. The existence of these acidic substances will not only corrode pipelines and equipment, but also cause serious pollution to the environment. Therefore, the country has strict indicators for the content of acidic gases in commercial natural gas. With the introduction of the emission reduction concept, the country’s requirements in this regard are becoming more and more stringent. Efficient desulfurization and decarbonization of the exploited natural gas has become the key to rational utilization of natural gas resources; traditional oilfield natural gas desulfurization technologies mainly use chemical absorption and membrane Absorption method, chemical absorption method was proposed earlier to remove H in natural gas 2 S and CO 2 The literature (Peng Shujing, Ren Ailing. Research on recovery technology of carbon dioxide in flue gas chemical absorption method [D]. Hebei University of Science and Technology, 2007) describes in detail the removal of H from natural gas by various absorption methods 2 S method, but these methods have problems such as high energy consumption, low removal rate and easy to cause environmental pollution, and it is difficult to obtain high-purity H 2 S and CO 2 ; The patent "method for removing hydrogen sulfide from natural gas" (201010274051.5 publication (announcement) No. CN101955828A) once proposed a specific method for using the hydrate method for desulfurization, however, as the hydrate reaction process H 2 The partial pressure of S decreases, the formation is more and more difficult, and the removal rate is low. In addition, the literature (Xi Wang, Shen Jie. Research progress in natural gas desulfurization technology [J]. Gas and Heat, 2010, 30 (11): 31- 33.) It also pointed out that the microbial method and the high gravity redox method are used to remove acid gases in natural gas, but these technologies are still a long way from the actual industrial application. Therefore, it is urgent to design a uniform and stable process A desulfurization and decarbonization device with good performance and high recovery efficiency

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