Sulfur elementary substance preparation system and method based on power plant desulfurization wastewater

A desulfurization wastewater and preparation system technology, applied in the direction of sulfur preparation/purification, separation methods, chemical instruments and methods, etc., can solve the problems of high treatment costs and difficult wastewater treatment, and achieve high purity, good market prospects, and efficiency high effect

Pending Publication Date: 2020-09-08
NORTH CHINA POWER ENG
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Problems solved by technology

[0005] Power plant desulfurization wastewater contains a large amount of sulfate, and this kind of wastewater with high salt content is extremely difficult to treat, and the treatment cost is very high

Method used

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  • Sulfur elementary substance preparation system and method based on power plant desulfurization wastewater
  • Sulfur elementary substance preparation system and method based on power plant desulfurization wastewater

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Embodiment Construction

[0023] see figure 1 The shown sulfur elemental preparation system based on power plant desulfurization wastewater, which at least includes sequentially connected biological anaerobic reaction units 1, H 2 S absorption unit 2, biological oxidation reaction unit 3 and centrifugal dehydration unit 4.

[0024] The biological anaerobic reaction unit 1 can adopt an anaerobic reaction tower. The inlet of the anaerobic reaction tower is passed into the desulfurization wastewater of the power plant, and the H generated after the biological anaerobic reaction 2 S is discharged through the gas outlet and passed into the subsequent H 2 S absorption unit 2, the generated low-sulfur wastewater is discharged through the liquid outlet. The destination of low-sulfur waste water is divided into two routes, one route is further treated and reused in the factory, and the other route is electrically heated and then returned to the anaerobic reaction tower to participate in the reaction. The co...

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Abstract

The invention relates to a sulfur elementary substance preparation system and method based on power plant desulfurization wastewater. The system comprises a biological anaerobic reaction unit, an H2Sabsorption unit, a biological oxidation reaction unit and a centrifugal dehydration unit which are connected in sequence, the system is used for preparing elemental sulfur, the method comprises the following steps: introducing power plant desulfurization wastewater into the biological anaerobic reaction unit, wherein a sulfate is reduced into H2S by sulfate reducing bacteria, introducing the H2S into an H2S absorption unit, wherein the alkali liquor in the H2S absorption unit absorbs H2S and then enters the biological oxidation reaction unit and H2S is oxidized into a sulfur elementary substance solution by thiobacillus thioparus in the sulfur elementary substance solution, introducing the elemental sulfur solution into a centrifugal dehydration unit, and carrying out centrifugation and dehydration to obtain elementary sulfur with purity greater than or equal to 99%. According to the method, the elemental sulfur is prepared by taking the desulfurization wastewater of a power plant as araw material, the sulfate content of the desulfurization wastewater of the power plant is reduced, the wastewater of the power plant is recycled, further treatment on the desulfurization wastewater of the power plant is facilitated, and the method is environment-friendly and sustainable.

Description

technical field [0001] The invention belongs to the field of chemical raw material preparation, and relates to a method for preparing elemental sulfur, in particular to a method for preparing elemental sulfur based on power plant desulfurization wastewater. Background technique [0002] Elemental sulfur is an important chemical raw material, which can be used in industries such as pesticides, fertilizers and dyes. At present, elemental sulfur is mainly extracted from petroleum, which is a non-renewable resource. Therefore, it is particularly urgent to find an alternative method. [0003] Invention patent publication number: CN108529714A discloses a photoelectrochemical reaction cell and its method for treating hydrogen sulfide waste gas and waste water. The adopted photoelectric catalytic reactor includes an anode chamber, a photoanode, a cathode chamber, a cathode, an external circuit and an ion exchange membrane separating the anode chamber and the cathode chamber. By a...

Claims

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Application Information

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IPC IPC(8): C02F3/28B01D53/78B01D53/52C01B17/04C02F103/18C02F101/10
CPCB01D53/52B01D53/78C01B17/04C02F3/28C02F2101/101C02F2103/18
Inventor 田江南张恬李红军罗扬徐淑姣周军刘军梅
Owner NORTH CHINA POWER ENG
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