Complex iron desulfurization technological process suitable for sulfur-containing shale oil associated gas

Abstract

The invention provides a complex iron desulfurization process flow of sulfur-containing shale oil associated gas. The process flow consists of a raw material gas separator, a cooling device, a vertical separator, a wet desulfurization tower, a settling separator, a regeneration tower, a flash tank, an alkali liquor storage tank, a sulfur slurry filter, a valve, a thermometer, a pressure gauge and a crude oil output flow meter. Fluid is separated, purified and cooled through the feed gas separator and the cooling device, so that the temperature meets the requirement of the desulfurizing tower. Separated crude oil is output after being metered; the separated natural gas flows into a wet desulfurization tower for desulfurization, meanwhile, a desulfurization agent is regularly supplemented from an alkali liquor storage tank, and desulfurization rich liquor enters a regeneration tower after being subjected to flash evaporation and is mixed with self-absorption air in a two-phase mode for further oxidation regeneration; and solid sulfur, sulfur slurry and the like formed after desulfurization are filtered by a sulfur slurry filter. The device overcomes the defects that an existing device is poor in desulfurization effect and difficult to operate, has the function of recycling the complexing iron desulfurizer, and reduces the experiment cost.

Description

technical field [0001] The invention relates to a complex iron desulfurization process for associated gas of medium-sulfur-containing shale oil, and relates to the fields of separation, purification and desulfurization of sulfur-containing natural gas. Background technique [0002] Shale oil refers to the petroleum resources contained in shale-based shale formations. These include petroleum in pores and fractures of shale, as well as petroleum resources in adjacent layers and interlayers of tight carbonate or clastic rocks in shale formations. Associated gas refers to the gas that appears in the oil layer along with the petroleum liquid during the production process of the oil field. The main component is methane, which usually contains a large amount of ethane and hydrocarbon heavy components. [0003] In our country, among the proven natural gas fields, sulfur-bearing natural gas fields account for about 31.7%, which must be purified to meet certain technical indicators. ...

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Problems solved by technology

[0004] According to the classification of national sour gas reservoir standards, the hydrogen sulfide content is 5,000-300,000 mg / m 3 It is medium-sulfur natural gas, and the associated gas of medium-sulfur shale oil is due to H 2 High concentration of S, high water content, high temperature, imperfect design of desulfurization treatment system, unsatisfactory economy and safety

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