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Device and method for removing hydrogen sulfide and carbonyl sulfide using microwave plasma

A microwave plasma and plasma technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of low synthesis gas temperature, high energy consumption, and low power generation efficiency, and achieve simplified separation procedures, Reduced maintenance costs and reduced equipment costs

Active Publication Date: 2015-09-30
KOREA INST OF ENERGY RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing commercial synthetic gas desulfurization technology performs the absorption process at a low temperature below 50°C. The temperature of the output synthetic gas is low, and the power generation efficiency is low. It also needs to go through the moisture reaction process, the absorption tower, and the regeneration of the absorbent. tower, and the Claus process for producing sulfur, the absorbent needs to be replenished periodically, which has the disadvantages of high process cost and energy consumption
In addition, when the sulfur absorbent comes into contact with the synthesis gas, a part of the scattered absorbent is mixed into the synthesis gas and flows into the gas engine, causing problems of engine corrosion and air pollution.

Method used

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  • Device and method for removing hydrogen sulfide and carbonyl sulfide using microwave plasma
  • Device and method for removing hydrogen sulfide and carbonyl sulfide using microwave plasma
  • Device and method for removing hydrogen sulfide and carbonyl sulfide using microwave plasma

Examples

Experimental program
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Effect test

Embodiment 1

[0074] use figure 1 The hydrogen sulfide and carbonyl sulfide removal apparatus of the present invention using microwave plasma was shown to perform hydrogen sulfide and carbonyl sulfide removal experiments.

[0075] In order to make it easier to judge the decomposition of hydrogen sulfide and carbonyl sulfide, a mixed gas of mixed nitrogen, hydrogen sulfide and carbonyl sulfide was used as a mixed gas instead of a mixed gas containing hydrogen and carbon monoxide.

[0076] The hydrogen sulfide gas concentration in nitrogen ranges from 300 ppm to a maximum of 1500 ppm, and the concentration of carbonyl sulfide gas in nitrogen ranges from 30 ppm to a maximum of 300 ppm. This is similar to the concentration of hydrogen sulfide and carbonyl sulfide contained in the synthesis gas produced by the general coal gasification process at 600 ppm and 100 ppm. It is more than two times higher, and more severe experimental conditions are applicable.

[0077] The flow rate of the injected gas is f...

Embodiment 2

[0085] Under 1.6kw plasma power condition, the H 2 S 1000ppm, COS 100ppm, N 2 Used as the transfer gas and the plasma generating gas, respectively, the removal experiment of hydrogen sulfide and carbonyl sulfide mixed gas was performed using the same method as in Example 1. The experimental results are as Picture 9 Shown.

[0086] Such as Picture 9 As shown, when hydrogen sulfide is mixed with carbonyl sulfide, the decomposition ability of carbonyl sulfide is similar to that of Example 1, and the decomposition rate of hydrogen sulfide is shown to be about 0.5% to 1.5% lower than that of Example 1.

[0087] In addition, Picture 10 A photograph showing the state of solid sulfur trapped in the sulfur trap tank after the hydrogen sulfide and carbonyl sulfide removal experiment of the present invention. As shown in the figure, after the test, solid sulfur adhered to the inner wall of the trap tank, and it can be seen that solid sulfur separation was formed by plasma.

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Abstract

The invention relates to a device and a method for removing hydrogen sulphide and carbonyl sulphide by virtue of microwave plasmas, and in particular to a device and a method for removing hydrogen sulphide and carbonyl sulphide contained in natural gas, crude oil refined gas and gasification synthesised gas by virtue of the microwave plasmas, so as to generate sulphur element, hydrogen and carbon monoxide. In particular, a large amount of hydrogen sulphide and a large amount of carbonyl sulphide are contained in the synthesised gas prepared by mixing sulphur-containing hydrocarbon substances, steam and oxygen to perform partial oxidation reaction in a reducing atmosphere, in order to remove the hydrogen sulphide and the carbonyl sulphide, the invention provides the device and the method for removing the hydrogen sulphide and the carbonyl sulphide by virtue of the microwave plasmas, wherein the hydrogen sulphide and the carbonyl sulphide are decomposed into the sulphur element, the hydrogen and the carbon monoxide by virtue of the plasmas, then the decomposed sulphur element, hydrogen and carbon monoxide are separated and collected by means of a rotational flow, so that the collection procedure for fuel gas and the sulphur element can be simplified, and the production efficiency and the economical efficiency can be improved.

Description

Technical field [0001] The invention relates to a hydrogen sulfide and carbonyl sulfide removal device and method using microwave plasma, in particular to the use of microwave plasma to remove hydrogen sulfide and carbonyl sulfide contained in natural gas, crude oil refined gas, and gasification synthesis gas, thereby producing sulfur and Hydrogen devices and methods. [0002] Especially in a reducing atmosphere, the synthesis gas obtained by mixing sulfur-containing hydrocarbon substances with steam and oxygen to cause partial oxidation reaction will contain a large amount of hydrogen sulfide and carbonyl sulfide. In order to remove the hydrogen sulfide and carbonyl sulfide , The present invention uses atmospheric pressure plasma to decompose hydrogen sulfide and carbonyl sulfide into sulfur (S) and hydrogen (H 2 ), then the decomposed sulfur and hydrogen are separated and collected in a swirling manner, which can simplify the separation process of fuel gas and sulfur, and improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/76B01D53/52B01D53/72
Inventor 尹相竣李载区金容久
Owner KOREA INST OF ENERGY RES