Plasma reaction apparatus and method for decomposing hydrogen sulfide

A reaction device and plasma technology, applied in the field of plasma chemistry, can solve the problems of low conversion rate of hydrogen sulfide and high energy consumption of decomposition, and achieve the effect of improving conversion rate, flexible temperature control, and realizing continuous and stable progress

Pending Publication Date: 2019-08-16
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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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 plasma reaction device provided by the prior art when it is used for the decomposition of hydrogen sulfide, and to provide a new one that can improve the hydrogen sulfide conversion rate. Plasma reaction device and method for decomposing hydrogen sulfide using the same

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  • Plasma reaction apparatus and method for decomposing hydrogen sulfide

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specific Embodiment approach

[0088] Nitrogen gas is introduced into the inner cylinder of the 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 plasma reaction device 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 field between the center electrode and the ground electrode by adjusting the voltage and frequency . The hydrogen sulfide gas is ionized in the discharge area and decomposed into hydrogen and elemental sulfur. The ...

Embodiment 1

[0100] use figure 1 The shown plasma reaction device carries out the hydrogen sulfide decomposition reaction, and the specific structure and structural parameters of the plasma reaction device are as follows:

[0101] The reaction unit includes:

[0102] 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 ;

[0103] 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;

[0104] 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;

[0105] A ground electrode, the ground electrode is wrapped on the outer s...

Embodiment 2

[0130] The present embodiment adopts the plasma reaction device similar to embodiment 1 to carry out the decomposition reaction of hydrogen sulfide, the difference is, in the present 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 blocking medium is arranged around the inner wall of the inner cylinder;

[0133] The distance L between the outer sidewall of the center electrode and the inner sidewall of the barrier medium 1 and the length of the discharge area L 2 The proportional relationship between them is: L 1 :L 2 =1:2800;

[0134] L 1 with the thickness of the barrier dielectric D 1 The ratio is 18:1;

[0135] h 1 and the length of the discharge region L 2 The proportional relationship between is: H 1 :L 2 =1:130;

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

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Abstract

The invention relates to the field of plasma chemistry, and discloses a plasma reaction apparatus and a method for decomposing hydrogen sulfide. The 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); and a grounding electrode (4) formed by a solid electric-conduction material, wherein at least part of the cylinder body structure of the inner cylinder (1) is formed by a barrier medium, or a barrier medium is arranged on the inner side wall of the inner cylinder (1), and a ratio (L1:L2)of the distance L1 between the outer side wall of the center electrode (3) 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 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 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 close attention ...

Claims

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Application Information

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IPC IPC(8): C01B17/04C01B3/04
CPCC01B3/04C01B17/04Y02E60/36
Inventor 任君朋张婧厉建祥张铁孙峰徐伟朱云峰
Owner CHINA PETROLEUM & CHEM CORP
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