Low temperature plasma apparatus for decomposing hydrogen sulfide, and hydrogen sulfide decomposing method

Abstract

The invention relates to the field of plasma chemistry, and discloses a low temperature plasma apparatus for decomposing hydrogen sulfide, and a hydrogen sulfide decomposing method. The apparatus comprises a gas supply-gas distribution unit, a plasma reaction unit and a product separation unit, wherein the gas supply-gas distribution unit, the plasma reaction unit and the product separation unit are sequentially connected by pipelines, the plasma reaction unit comprises a low temperature plasma reactor and a plasma power source, the reactor comprises an inner cylinder, an outer cylinder, a center electrode arranged in the inner cylinder, a barrier medium and a grounding electrode, the barrier medium is arranged around the inner side wall of the inner cylinder, or wraps the outer surface ofthe center electrode, or forms the side wall of the inner cylinder, and a ratio (L1:D1) of the thickness L1 of discharge gas gap to the thickness D1 of the barrier medium is (0.05-100):1. According to the present invention, with the apparatus and the method, the hydrogen sulfide conversion rate can be increased.

Description

technical field

[0001] The invention relates to the field of plasma chemistry, in particular to a low-temperature plasma device for decomposing hydrogen sulfide 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 easily leads to catalyst poisoning and deactivation in chemical production; in addition, hydrogen sulfide can also endanger human health and cause environmental pollution. Therefore, the harmless treatment of a large amount of hydrogen sulfide gas produced in industrial fields such as oil, natural gas, coal and mineral processing needs to be solved urgently, no matter in terms of process requirements, equipment maintenance or environmental protection requirements.

[0003] At present, the Claus method is commonly used in industry to treat hydrogen sulfide, and the method is to partially oxidize hydro...

Examples

specific Embodiment approach

[0088] 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

[0138] use has image 3 The low-temperature plasma device for decomposing hydrogen sulfide in the flow chart shown in the flow chart carries out hydrogen sulfide decomposition reaction, and the low-temperature plasma reactor in the present embodiment has figure 1 structure shown.

[0139] The process flow of this embodiment is as shown in the aforementioned specific implementation, and the structural parameters of the low-temperature plasma reactor are as follows:

[0140] Low temperature plasma reactors include:

[0141] An inner cylinder, the inner cylinder is respectively provided with a reactor inlet, a gas product outlet and a liquid product outlet, wherein the entire cylinder structure of the inner cylinder is formed by a barrier medium, and the material forming the barrier medium is hard Glass;

[0142] 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 he...

Embodiment 2

[0171] use has image 3 The low-temperature plasma device for decomposing hydrogen sulfide in the flow chart shown in the flow chart carries out hydrogen sulfide decomposition reaction, and the low-temperature plasma reactor in the present embodiment has figure 2 structure shown.

[0172] The process flow of this embodiment is as shown in the aforementioned specific implementation, and the structural parameters of the low-temperature plasma reactor are as follows:

[0173] Low temperature plasma reactors include:

[0174] an inner cylinder, the inner cylinder is respectively provided with a reactor inlet, a gas product outlet and a liquid product outlet;

[0175] 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;

[0176] A central electrode, the central electrode is arranged at the central axis of the inner cylinder, and the materia...

technical field

[0001] The invention relates to the field of plasma chemistry, in particular to a low-temperature plasma device for decomposing hydrogen sulfide 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 easily leads to catalyst poisoning and deactivation in chemical production; in addition, hydrogen sulfide can also endanger human health and cause environmental pollution. Therefore, the harmless treatment of a large amount of hydrogen sulfide gas produced in industrial fields such as oil, natural gas, coal and mineral processing needs to be solved urgently, no matter in terms of process requirements, equipment maintenance or environmental protection requirements.

[0003] At present, the Claus method is commonly used in industry to treat hydrogen sulfide, and the method is to partially oxidize hydro...

Examples

specific Embodiment approach

[0088] 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

[0138] use has image 3 The low-temperature plasma device for decomposing hydrogen sulfide in the flow chart shown in the flow chart carries out hydrogen sulfide decomposition reaction, and the low-temperature plasma reactor in the present embodiment has figure 1 structure shown.

[0139] The process flow of this embodiment is as shown in the aforementioned specific implementation, and the structural parameters of the low-temperature plasma reactor are as follows:

[0140] Low temperature plasma reactors include:

[0141] An inner cylinder, the inner cylinder is respectively provided with a reactor inlet, a gas product outlet and a liquid product outlet, wherein the entire cylinder structure of the inner cylinder is formed by a barrier medium, and the material forming the barrier medium is hard Glass;

[0142] 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 he...

Embodiment 2

[0171] use has image 3 The low-temperature plasma device for decomposing hydrogen sulfide in the flow chart shown in the flow chart carries out hydrogen sulfide decomposition reaction, and the low-temperature plasma reactor in the present embodiment has figure 2 structure shown.

[0172] The process flow of this embodiment is as shown in the aforementioned specific implementation, and the structural parameters of the low-temperature plasma reactor are as follows:

[0173] Low temperature plasma reactors include:

[0174] an inner cylinder, the inner cylinder is respectively provided with a reactor inlet, a gas product outlet and a liquid product outlet;

[0175] 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;

[0176] A central electrode, the central electrode is arranged at the central axis of the inner cylinder, and the materia...

Images