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Low temperature plasma reaction apparatus and method for decomposing hydrogen sulfide

A low-temperature plasma and reaction device technology, applied in the field of plasma chemistry, can solve the problems of high decomposition energy consumption and low conversion rate of hydrogen sulfide, and achieve the effect of improving conversion rate, flexible temperature control, and realizing 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 reaction device provided by the prior art when it is used for the decomposition of hydrogen sulfide, and provide a new method that can improve the conversion rate of hydrogen sulfide plasma reactor

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  • Low temperature plasma reaction apparatus and method for decomposing hydrogen sulfide

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specific Embodiment approach

[0087] Nitrogen gas is introduced into the inner barrel of the low-temperature plasma reaction device 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 reaction device from the reactor inlet, 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 ...

Embodiment 1

[0099] use figure 1The shown low-temperature plasma reaction device performs hydrogen sulfide decomposition reaction, and the specific structure and structural parameters of the low-temperature plasma reaction device are as follows:

[0100] The reaction unit includes:

[0101] an inner cylinder, the inner cylinder is respectively provided with a reactor inlet, a gas product outlet and a liquid product outlet;

[0102] 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;

[0103] 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;

[0104] A ground electrode, the ground electrode is wrapped on the inner wall of the inner cylinder, and the material forming the ground electrode is stainless steel metal foil;

[0105...

Embodiment 2

[0130] This embodiment adopts a low-temperature plasma reaction device similar to that of Embodiment 1 to carry out the decomposition reaction of hydrogen sulfide. The difference is that in this embodiment:

[0131] 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;

[0132] The barrier medium is disposed on the outer surface of the center electrode;

[0133] The distance L between the outer sidewall of the barrier medium and the inner sidewall of the ground electrode 1 and the length of the discharge area L 2 The proportional relationship between them is: L 1 :L 2 =1:200;

[0134] L 1 with the thickness of the barrier dielectric D 1 The ratio is 20:1;

[0135] h 1 and the length of the discharge region L 2 The proportional relationship between is: H 1 :L 2 =1:120;

[0136] In this embodiment, H is introduced into the inner cylinder of the plasma reaction devi...

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Abstract

The present invention relates to the field of plasma chemistry, and discloses a low temperature plasma reaction apparatus and a method for decomposing hydrogen sulfide. The low temperature plasma reaction apparatus 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) arranged around the side wall of the inner cylinder (1); and a barrier medium (6) arranged on at least part of the outer surface of the center electrode (3), wherein a ratio (L1:L2) of thedistance L1 between the outer side wall of the barrier medium and the inner side wall of the grounding electrode to the length L2 of a discharge region is 1:(0.5-6000). According to the present invention, the low temperature plasma reaction apparatus 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 reaction device 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04C01B17/04B01J19/08
CPCB01J19/088C01B3/04C01B17/0495Y02E60/36
Inventor 任君朋张婧王林徐伟石宁金满平李亚辉
Owner CHINA PETROLEUM & CHEM CORP
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