Multi-reaction-tube low-temperature plasma device and method for decomposing hydrogen sulfide

A low-temperature plasma and reaction tube technology, applied in the field of ion chemistry, can solve the problems of low hydrogen sulfide conversion rate and high energy consumption for decomposition

Pending Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 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 equipment 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 As well as a multi-reaction tube low-temperature plasma reaction device for reducing decomposition energy consumption and a method for decomposing hydrogen sulfide using the reaction device

Method used

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  • Multi-reaction-tube low-temperature plasma device and method for decomposing hydrogen sulfide

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Experimental program
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Effect test

Embodiment 1

[0124] adopted with figure 1 The shown low temperature plasma reaction equipment is similar to the structure of the reaction equipment for hydrogen sulfide decomposition reaction. The specific structure and structural parameters of the low temperature plasma reaction equipment are as follows:

[0125] Reaction equipment includes:

[0126] The first cavity is respectively provided with a reactor inlet, a gas product outlet and a liquid product outlet, and the first cavity contains 4 reaction tubes arranged side by side, and each of the reaction tubes The top and the bottom of the corresponding communication respectively, make the raw material that enters by described reactor inlet can respectively enter in each described reaction tube, and make the gaseous product that produces in each described reaction tube can be drawn out by described gaseous product outlet, And the liquid product produced in each of the reaction tubes can be drawn out from the outlet of the liquid product...

Embodiment 2

[0155] 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:

[0156] All side walls of each reaction tube are formed by external electrodes, the material forming the external electrodes is stainless steel metal foil, and the external electrodes are connected to a high-voltage power supply, and the internal electrodes are grounded;

[0157] The barrier medium is arranged around the inner wall of each reaction tube;

[0158] L 2 with D 1 ratio of 15:1; and H 1 :L 3 =1:85;

[0159] In this embodiment, H is passed from the reactor inlet to the inner cylinder of the high-throughput low-temperature plasma reactor. 2 S / Ar mixed gas, where H 2 The volume fraction of S is 65%, the flow rate of the mixed gas is controlled so that the average residence time of the gas in the discharge area is 17.9s, and the pressure is 0.12MPa. h 2 After the S / Ar mixture ...

Embodiment 3

[0163] 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:

[0164] All side walls of each reaction tube are formed by external electrodes, the material forming the external electrodes is copper foil, the external electrodes are grounded, and the internal electrodes are connected to a high-voltage power supply;

[0165] The barrier medium is arranged around the center of each reaction tube without directly contacting the side wall of the reaction tube;

[0166] L 2 with D 1 The ratio of 0.5:1; and H 1 :L 3 =1:220;

[0167] In this embodiment, H is passed from the reactor inlet to the inner cylinder of the high-throughput low-temperature plasma reactor. 2 S / Ar mixed gas, where H 2 The volume fraction of S is 65%, the flow rate of the mixed gas is controlled so that the average residence time of the gas in the discharge area is 15.3s, and the pres...

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Abstract

The invention relates to the field of plasma chemistry, and discloses a multi-reaction-tube low-temperature plasma device and a method for decomposing hydrogen sulfide, the device comprising: a firstcavity (1) formed by at least two parallel reaction tubes; the second cavity (2) that is nested in the first cavity (1); the third cavity (7) that is nested outside the first cavity (1); and an innerelectrode (3), an outer electrode (4) and a blocking medium (6) that are respectively arranged in each reaction tube. The multi-reaction-tube low-temperature plasma reaction device provided by the invention can be used for plasma decomposition of hydrogen sulfide, and the reactor can generate uniform and efficient dielectric barrier discharge, so that hydrogen sulfide is directly decomposed into hydrogen and sulfur.

Description

technical field [0001] The invention relates to the field of plasma chemistry, in particular to a multi-reaction tube low-temperature plasma 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. [0003] Therefore, the decomposition of hydrogen sulfide into sulfur and hydrogen has gradually become a technical field that researchers at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04C01B17/04
CPCC01B3/04C01B17/04C01B17/0404Y02E60/36
Inventor 张婧徐伟任君朋张铁孙峰周明川李亚辉石宁
Owner CHINA PETROLEUM & CHEM CORP
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