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Low temperature plasma reactor and method for decomposing hydrogen sulfide

A low-temperature plasma and reactor technology, applied in the field of ion chemistry, can solve the problems of high decomposition energy consumption and low hydrogen sulfide conversion rate, and achieve the effects of flexible temperature control, high continuity and stability, and long-term operation.

Pending Publication Date: 2019-08-16
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The purpose of the present invention is to overcome the defects of low hydrogen sulfide conversion rate and high decomposition energy consumption in the low temperature plasma reactor provided by the prior art when it is used for the decomposition of hydrogen sulfide, and to provide a new method that can improve the conversion rate of hydrogen sulfide And a low-temperature plasma reactor for reducing decomposition energy consumption and a method for decomposing hydrogen sulfide using the reactor

Method used

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  • Low temperature plasma reactor and method for decomposing hydrogen sulfide

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specific Embodiment approach

[0083] Nitrogen gas is introduced into the inner cylinder of the low-temperature plasma reactor from the reactor inlet to remove the air in the discharge area, and the gas is drawn out from the product outlet. At the same time, the heat transfer medium is introduced into the outer cylinder from the heat transfer medium inlet, and the introduced heat transfer medium is led out from the heat transfer medium outlet. The temperature of the heat transfer medium is maintained at the temperature required by the system reaction. Then feed the raw material gas containing hydrogen sulfide into the inner cylinder of the low-temperature plasma reactor from the inlet of the reactor, and turn on the high-voltage power supply after the raw material gas flow is stable, and form a plasma discharge between the center electrode and the ground electrode by adjusting the voltage and frequency field. The hydrogen sulfide gas is ionized in the discharge area and decomposed into hydrogen and element...

Embodiment 1

[0094] use figure 1 The shown low-temperature plasma reactor performs hydrogen sulfide decomposition reaction, and the specific structure and structural parameters of the low-temperature plasma reactor are as follows:

[0095] The reactor includes:

[0096] An inner cylinder, the inner cylinder is respectively provided with a reactor inlet, a gas product outlet and a liquid product outlet, wherein all side walls of the inner cylinder are formed by a barrier medium, and the material forming the barrier medium is hard glass ;

[0097] An outer cylinder, the outer cylinder is nested outside the inner cylinder, and the outer cylinder is respectively provided with a heat transfer medium inlet and a heat transfer medium outlet;

[0098] A central electrode, the central electrode is arranged at the central axis of the inner cylinder, and the material forming the central electrode is a stainless steel metal rod;

[0099] A ground electrode, the ground electrode is wrapped on the ou...

Embodiment 2

[0126] The present embodiment adopts the plasma reactor similar to embodiment 1 to carry out the decomposition reaction of hydrogen sulfide, the difference is, in the present embodiment:

[0127] All side walls of the inner cylinder are formed by grounding electrodes, and the material for forming the grounding electrodes is stainless steel metal foil;

[0128] The blocking medium is arranged around the inner wall of the inner cylinder;

[0129] The distance L between the outer sidewall of the center electrode and the inner sidewall of the barrier medium 1 with the thickness of the barrier dielectric D 1 The ratio is 20:1;

[0130] h 1 and the length L of the discharge region containing the barrier dielectric 2 The proportional relationship between is: H 1 :L 2 =1:100.

[0131] In this embodiment, H is introduced into the inner cylinder of the low-temperature plasma reactor from the reactor inlet. 2 S / Ar mixed gas, where H 2 The volume fraction of S is 30%, and the flo...

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Abstract

The invention relates to the field of plasma chemistry, and discloses a low temperature plasma reactor and a method for decomposing hydrogen sulfide. The reactor comprises: an inner cylinder (1); an outer cylinder (2) nested in the outer portion of the inner cylinder (1); a center electrode (3) arranged in the inner cylinder (1); a grounding electrode (4) formed by a solid electric-conduction material, wherein the grounding electrode forms at least part of the side wall of the inner cylinder or is arranged around the outer side wall of the inner cylinder; and a barrier medium, wherein the barrier medium forms at least part of the side wall of the inner cylinder or is arranged around the inner side wall of the inner cylinder. According to the present invention, the low temperature plasma reactor can achieve the continuous and stable performing of the hydrogen sulfide decomposition process at a significantly high hydrogen sulfide conversion rate, and can achieve long-cycle operation.

Description

technical field [0001] The invention relates to the field of plasma chemistry, in particular to a low-temperature plasma reactor and a method for decomposing hydrogen sulfide. Background technique [0002] Hydrogen sulfide (H 2 S) is a highly toxic and foul-smelling acid gas, which not only causes corrosion of metals and other materials, but also endangers human health and pollutes the environment. At present, large and medium-sized refineries in my country adopt the traditional Claus method (Claus) to treat 2 S tail gas, and recover sulfur. The method recovers only the sulfur in hydrogen sulfide, but converts the valuable hydrogen into water. From the perspective of comprehensive utilization of resources, hydrogen resources have not been effectively utilized in the traditional hydrogen sulfide recovery process. Therefore, the decomposition of hydrogen sulfide into sulfur and hydrogen has gradually become a technical field that researchers at home and abroad pay close at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/74B01D53/52C01B17/04C01B3/04
CPCB01D53/74B01D53/52C01B17/0495C01B3/04B01D2259/818B01D2258/02Y02E60/36
Inventor 张婧姜春明张铁任君朋石宁徐伟李亚辉
Owner CHINA PETROLEUM & CHEM CORP
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