Method for removing hydrogen sulfide from natural gas

Abstract

The invention relates to a method for removing hydrogen sulfide from natural gas, in particular to a treatment method for removing the hydrogen sulfide from the natural gas in a solid hydrate form, belonging to the treatment of natural gas. In the method, hydrogen sulfide gas in natural gas is converted into a solid hydrate under 2-10MPa at 15 DEG C under zero to 25 DEG C to separate and remove the sulfide gas from the natural gas. A device for the method mainly comprises a natural gas inlet buffer tank (2), a hydrogen sulfide hydration tower (5) and a hydrogen sulfide hydrate molding pot (8). The method comprises the following steps of: (1) standing still for dewatering; (2) synthesizing the hydrogen sulfide hydrate; (3) molding the hydrogen sulfide hydrate; (4) filtering and storing; and (5) outputting a desulfurized natural gas product. The method for removing the hydrogen sulfide from the natural gas can be used for separating the hydrogen sulfide from the natural gas in the form of solid without any absorbent and adsorbent and has the advantages of simple process flow, investment saving, low energy consumption and large hydrogen sulfide removal production capacity.

Description

technical field [0001] The invention is a method for removing hydrogen sulfide from natural gas. It belongs to the processing of natural gas, and particularly relates to a processing method for removing hydrogen sulfide from natural gas in the form of solid hydrate. Background technique [0002] Natural gas is stored in porous rock formations with a depth of about 3,000 to 4,000 meters underground. The main component is methane. It has been widely used in many aspects such as power industry, residential life, vehicle fuel, and chemical raw materials. [0003] The sulfur in natural gas mainly exists in the form of hydrogen sulfide. The acidity of hydrogen sulfide causes corrosion damage to natural gas transmission and application equipment. The toxicity of hydrogen sulfide poses a threat to the environment and human health. Therefore, the removal of hydrogen sulfide in natural gas is of great significance for the transportation and application of natural gas. [0004] There...

AI Technical Summary

Problems solved by technology

[0004] There are two types of natural gas desulfurization methods in the prior art: wet desulfurization and dry desulfurization. Wet desulfurization involves many chemical operation units and special equipment such as absorption towers, flash tanks, and regeneration towers. The device process is complicated and the automation control requirements are strict. , large investment, high energy consumption

Dry desulfurization uses a desulfurizer, which is difficult to regenerate, cumbersome to operate, and has low processing capacity

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