Flowing light discharge plasma oxygenized sulfite

A technology for oxidizing sulfite and plasma, applied in the direction of sulfate preparation, etc., can solve the problems of large reactor and long reaction time, and achieve the effects of short processing time, small volume and low energy consumption

Active Publication Date: 2005-08-17
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As everyone knows, conventional treatment methods for oxidizing tetravalent sulfur solutions, such as current GE, Bischof and NKK companies, all use compressed air

Method used

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  • Flowing light discharge plasma oxygenized sulfite
  • Flowing light discharge plasma oxygenized sulfite
  • Flowing light discharge plasma oxygenized sulfite

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Experimental program
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Effect test

specific Embodiment approach 2

[0031] Such as figure 2 As shown, the reactor is a vertical cylindrical structure, and the streamer discharge is generated between the discharge electrode 2 and the ground electrode 3 by means of a high-voltage narrow pulse power supply 1. The injection power is 100 watts, and the reactor is filled, and the oxygen-containing gas is air. It is blown in from the bottom of the reactor through the sieve plate 13, the opening ratio of the sieve plate is 47%, the height of the hydrostatic layer is 10mm, and the sulfurous acid to be treated with a volume of 10 liters and a concentration of 2 moles injected into the reactor by 7 Salt solution, in plasma reaction zone 4, forms bubble, causes discharge oxidation reaction, and the sulfate solution after treatment is discharged by outlet 8, and tail gas is discharged from reactor top, and oxidation rate reaches 95%, and energy consumption is 15 watt hours / Moore.

[0032] Compared with the conventional chemical technology, the practical...

specific Embodiment approach 3

[0033] Such as image 3 As shown, the streamer discharge takes place between the discharge electrode 2 and the ground electrode 3 by means of a high-voltage power supply 1, and fills the reactor. The carrier 15 is composed of a porous ceramic with a specific surface area of ​​8 square centimeters per cubic centimeter. The sulfite solution 7 to be treated is leaked into the carrier through the injection device 5 in the groove on the top of the reactor, and flows through the surface of the porous ceramic. It is 10 liters / hour, and the oxidation process in the carrier liquid film is initiated by streamer discharge, and the discharge power is 100 watts. The treated normal salt solution is discharged from 8, the oxidation rate reaches 98%, and the energy consumption is 17 Wh / mol.

[0034] Compared with the conventional chemical technology, the practical industrial technology of streamer discharge plasma oxidation of sulfite provided by the present invention has the following benef...

specific Embodiment approach 4

[0035] Such as Figure 4 As shown, the flue gas after heat exchange 14a is 110 degrees Celsius, and enters the top of the gas-liquid-solid three-phase vertical streamer discharge reactor 3a. reaction, oxidize the residual sulfite in the resulting liquid to sulfate, discharge the resulting dry powder from 3a to the tank 12, the flue gas is cooled and humidified through 3a, and enters the thermochemical reactor 9 from the bottom side of the device for use in The circulating ammonia-containing liquid in the liquid storage tank 10 and the liquid storage adjustment tank 11 is repeatedly leached, and ammonia water is injected into the sub-stoichiometric amount in 11, so that the solute of the generated liquid is mainly ammonium bisulfite. An appropriate amount of the generated liquid is injected into the normal temperature vertical streamer discharge reactor 3b to continue to oxidize the nitrite, and process the gas entering 3b from 9, because the gas in 9 and 3 is all treated with ...

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Abstract

The present invention discloses one industrial method of oxidizing four-valent sulfide with non-thermal plasma in the co-existence of OH, H, O, N and other high chemical activity free radicals. High voltage power source is applied to the discharge system of streamer discharge plasma reactor to form the streamer discharge plasma reaction area while sulfite solution is fed into the reaction area, and the four-valent sulfur is oxidized into six-valent sulfur during the streamer discharge oxidizing process. Meanwhile, atomizing mode, bubbling mode or high specific surface area electrode is used to increase the gas-liquid mass transfer interface and raise the mass transfer efficiency. Compared with conventional method, the present invention has high oxidization rate, low power consumption, short processing time, small covered area, less ammonia leakage and other advantages.

Description

Technical field: [0001] The invention relates to the technical field of plasma chemical industry, in particular to the technical field of oxidizing tetravalent sulfides in liquid or slurry by relying on streamer discharge to generate non-thermal plasma to oxidize the tetravalent sulfide in an oxygen-containing gas environment. Background technique: [0002] As everyone knows, conventional treatment methods for oxidizing tetravalent sulfur solutions, such as current GE, Bischof and NKK companies, all use compressed air liquid phase bubbling (without discharge catalysis). This method has a large reactor and a long reaction time. In terms of application, it has its considerable limitations. Invention content: [0003] The object of the present invention is to provide an industrial treatment technology for oxidizing tetravalent sulfides with small reactor, short reaction time, and the application of streamer discharge plasma under the condition of multi-phase coexistence. [...

Claims

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Application Information

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IPC IPC(8): C01B17/96
Inventor 阎克平刘勇李瑞年张鸿迪
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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