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Method for rapidly preparing sulfur plasma based on plasma ionization

A plasma ionization and plasma technology, which is applied in the field of plasma, can solve the problems of difficult gasification of a large amount of sulfur, pollution of electrode materials, frequent replacement of electrodes, etc., and achieves the effects of rapid and stable heating and ionization, stable temperature, and convenient and flexible adjustment.

Pending Publication Date: 2021-10-19
上海三夫工程技术有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese invention patent CN1176244C discloses a vacuum plasma sulfurizing method, which ionizes heated and sublimated gaseous sulfur into positive sulfur ions and forms sulfur plasma in a DC electric field of about 800V, but the method is within 400°C (35 -120°C) low temperature, high vacuum 0.1-1Pa, 800-1000V DC electric field, ionizes gaseous sulfur into positive sulfur ions and forms low-temperature vacuum sulfur plasma, the DC electric field will consume electrodes, frequent electrode replacement, and high cost , and cause the pollution of the electrode material to the plasma. Its industrial use is plasma sulfurization treatment on the metal surface. (35-120°C) It is very difficult to realize a large amount of sulfur gasification under high vacuum, and it is not suitable for normal pressure or micro-negative pressure conditions that require high concentration and large amount of sulfur plasma.
[0007] Chinese invention patent CN1048356C discloses a self-growth method of microwave discharge passivation film on the surface of gallium arsenide, which uses microwave glow discharge to generate sulfur plasma, but this method is still the surface treatment of materials, and the microwave discharge used is still at a high temperature. Vacuum 10 -4 Low-concentration evaporation and plasmaization of sulfur powder at -10Pa, low temperature 60-150℃, the sulfur vapor pressure in the discharge area is maintained at 10 -2 -10Pa, belongs to the plasmaization process of a small amount of sulfur in high vacuum and low temperature evaporation, which forms a working condition of low concentration and small gas volume, and can only be used for the treatment of the surface of the workpiece

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  • Method for rapidly preparing sulfur plasma based on plasma ionization
  • Method for rapidly preparing sulfur plasma based on plasma ionization
  • Method for rapidly preparing sulfur plasma based on plasma ionization

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preparation example Construction

[0039] The preparation method of high-temperature sulfur gas is as follows: heating solid or liquid sulfur with steam, heat transfer oil or electric heating to a temperature higher than 120°C to melt into crude sulfur liquid, which is sent to a sulfur filter by a crude sulfur delivery pump for filtration, and the clear liquid at the outlet is refined The sulfur liquid flows into the refined sulfur tank, and then is sent into the closed gasifier through the refined sulfur delivery pump, atomized by the nozzle, and heated by electric heating to above 450°C to be vaporized into sulfur gas. Electric heating is one or a combination of resistance heating, electric induction heating, and microwave heating, and electric induction heating is preferably used. The optimal temperature of sulfur liquid is 130-158°C during the process of conveying, filtering and nozzle atomization. The temperature of liquid sulfur gasified by electric heating is 440-900°C, preferably 500-700°C.

[0040] Th...

Embodiment 1

[0044] Such as figure 2 As shown, the technical solution of this embodiment uses solid sulfur as a raw material, which is indirectly heated and melted into liquid sulfur by a steam coil, and the crude sulfur is pumped to a sulfur filter to filter and remove solid and organic impurities. After filtering, the refined liquid sulfur is put into the refined sulfur storage tank Store, then adjust and control the amount of sulfur through the refined sulfur pump and flow meter, and send it to the atomizing nozzle of the sulfur inlet of the gasifier, and then heat and gasify the gasifier to obtain high-temperature sulfur gas. Under the circumstances, high temperature sulfur gas is fed to make sulfur plasma.

[0045] Medium-frequency induction heating is used for liquid sulfur gasification, and high-frequency induction-coupled discharge plasma generator is used for gas sulfur plasmaization. The outer wall material of the plasma generator is made of quartz glass. In case of damage, the...

Embodiment 2

[0050] Such as image 3 As shown, the technical solution of this embodiment uses liquid sulfur as a raw material, heats and maintains the molten liquid sulfur through heat conduction oil or electric indirect heating, and pumps the crude sulfur through a sulfur filter to filter and remove solid and organic impurities. After filtering, the liquid sulfur is refined into refined sulfur. storage tank, and then adjust and control the amount of sulfur through the refined sulfur pump and flow meter, and send it to the atomizing nozzle of the sulfur inlet of the gasifier, and then heat and gasify the gasifier to obtain high-temperature sulfur gas. Under normal circumstances, the arc is fed with high temperature sulfur gas to produce sulfur plasma.

[0051] High-frequency microwave heating is used for liquid sulfur gasification, and high-frequency microwave discharge plasma generator is used for gas sulfur plasmaization. The outer wall of the plasma generator is made of ceramic non-meta...

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Abstract

The invention relates to a method for rapidly preparing sulfur plasma based on plasma ionization, which comprises the following steps of: firstly introducing argon as an arc starting medium into a plasma generator, and after normal arc starting, introducing sulfur-containing gas into the plasma generator to prepare a sulfur plasma with the temperature of 500-2500 DEG C. Compared with the prior art, the method has the advantages that the problems of electrode consumption and pollution do not exist, formation under a high vacuum condition is not needed, high-concentration and large-capacity sulfur plasma can be quickly obtained, the requirement of an industrial process on reducing gas is met, and the sulfur plasma can be used as industrial reducing gas (agent) for reducing and decomposing materials such as gypsum, waste sulfuric acid and manganese dioxide. The process is simple, the generation speed is high, a large scale can be realized, and the high-purity gas reducing agent-sulfur plasma gas flow can be continuously produced by using solid or liquid sulfur.

Description

technical field [0001] The invention belongs to the technical field of sulfur plasma preparation, and relates to a method for rapidly preparing sulfur plasma based on plasma ionization. Background technique [0002] Sulfur is an important basic chemical raw material, which can be widely used to produce sulfur dioxide, sulfuric acid, carbon disulfide, insoluble sulfur, metal sulfide, and can also be used to reduce sulfate ore, sulfate industrial waste residue and industrial waste sulfuric acid to produce sulfur with higher added value product. [0003] The physical characteristics of sulfur are light yellow orthorhombic crystals at room temperature, in the form of saddle S 8 Ring structure, melting point 115.207-120°C, fire point 250°C, boiling point 444.6°C, solid density (1.96-2.07×10 3 kg / m 3 ), a flash point of 207°C. When the temperature changes, three states of solid, liquid and gas can occur. At 30-95.39°C, it is orthorhombic crystal, and at 95.39-115.207°C, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/24
CPCH05H1/24
Inventor 张国兴庞仁杰储学群
Owner 上海三夫工程技术有限公司