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A resource utilization method of sulfur waste residue in wet desulfurization process

A wet desulfurization and resource utilization technology, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of limited industrial application, high environmental protection pressure, and lengthy processes, and achieve low cost, reduce raw material costs, and equipment. less demanding effects

Active Publication Date: 2022-03-04
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Wang Pingyan et al. (Study on Purification of Coking Plant By-product Crude Sulfur by Solvent Method, Applied Chemical Industry, 2008, 37:1514-1517) used highly toxic carbon disulfide as a solvent to purify coking plant by-product crude sulfur, which required repeated extraction for 5 times to Reaching the relevant purity, the pressure of environmental protection is relatively high, and the process is lengthy, which limits the industrial application of this technology

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  • A resource utilization method of sulfur waste residue in wet desulfurization process
  • A resource utilization method of sulfur waste residue in wet desulfurization process

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Embodiment 1

[0034] The preparation method of the present embodiment comprises the following steps:

[0035] Step 1, put 40kg wet desulfurization process sulfur waste residue and 10kg strip wood activated carbon into the reactor 3 through the feeding port 2, wherein the wet desulfurization process sulfur waste residue is placed on the upper layer of activated carbon, such asfigure 1 As shown, the black dots in the reactor 3 in the figure represent the sulfur waste residue of the wet desulfurization process, and the gray dots represent activated carbon. The reactor 3 is closed and then heated to 125°C for 60 minutes;

[0036] Step 2: Introducing nitrogen gas with a temperature of 220° C. into the reactor 3 heated and kept warm in step 1 through the second vent pipe 5 and continuing to keep warm for 80 minutes;

[0037] Step 3, send the gas flowing out of the reactor 3 after continuing to keep warm in step 2 into the sulfur trapping device through the first ventilation pipe 1, and then obtain...

Embodiment 2

[0040] The preparation method of the present embodiment comprises the following steps:

[0041] Step 1, put 80kg of wet desulfurization process sulfur waste residue and 10kg of strip-shaped coal-based activated carbon into the reactor 3 in layers through the feed port 2, wherein the wet desulfurization process sulfur waste residue is placed on the upper layer of the activated carbon, such as figure 1 As shown, the black dots in the reactor 3 in the figure represent the sulfur waste residue of the wet desulfurization process, and the gray dots represent activated carbon. The reactor 3 is closed and then heated to 140°C for 90 minutes;

[0042] Step 2: Introducing nitrogen gas with a temperature of 330° C. into the heated and insulated reactor 3 through the second vent pipe 5 to continue to insulate for 70 minutes;

[0043] Step 3, send the gas flowing out of the reactor 3 after continuing to keep warm in step 2 into the sulfur trapping device through the first ventilation pipe ...

Embodiment 3

[0046] The preparation method of the present embodiment comprises the following steps:

[0047] Step 1, put 5kg of wet desulfurization process sulfur waste residue and 10kg strip wood activated carbon into reactor 3 in layers through feeding port 2, wherein the wet desulfurization process sulfur waste residue is placed on the upper layer of activated carbon, such as figure 1 As shown, the black dots in the reactor 3 in the figure represent the sulfur waste residue of the wet desulfurization process, and the gray dots represent activated carbon. The reactor is sealed and then heated to 110°C for 60 minutes;

[0048] Step 2, feed nitrogen gas with a temperature of 180° C. into the reactor 3 heated and kept warm in step 1 through the second ventilation pipe 5 and continue to keep warm for 60 minutes;

[0049] Step 3, send the gas flowing out of the reactor 3 after continuing to keep warm in step 2 into the sulfur trapping device through the first ventilation pipe 1, and then obta...

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Abstract

The invention discloses a resource utilization method of sulfur waste slag in wet desulfurization process. The method comprises: 1. putting sulfur waste slag and activated carbon in wet desulfurization process into a reactor, and then heating and keeping it warm; The heated nitrogen is passed into the reactor to continue the heat preservation; 3. The gas flowing out of the reactor after the heat preservation is continued is sent to the sulfur trapping device, and then the sulfur is obtained by cooling and separation. The invention utilizes activated carbon to absorb the molten sulfur waste residue, and then feeds heated nitrogen to sublimate the sulfur to separate it from the inorganic salts and organic matter in the sulfur waste residue. The operation is simple and stable, the process flow is short, and no solvent or high-temperature treatment is required. It has low requirements, low energy consumption, no waste water and waste gas, is environmentally friendly, and finally obtains high-purity sulfur, thus solving the problem of resource utilization of sulfur waste residue in the wet desulfurization process.

Description

technical field [0001] The invention belongs to the technical field of sulfur waste residue recovery, and in particular relates to a resource utilization method of sulfur waste residue in a wet desulfurization process. Background technique [0002] my country is the world's largest consumer of fossil fuels such as coal and petroleum. The sulfur species in fossil fuels have adverse effects on subsequent production and use and environmental protection. At present, most of the relevant chemical companies in my country use wet desulfurization process to remove sulfur species in synthesis gas, coke oven gas or other process gases. Wet desulfurization has the characteristics of low investment, high desulfurization efficiency, large desulfurization capacity, and low operating cost; however, due to the process characteristics of wet desulfurization, some inorganic salts and a small amount of organic matter will enter the final product sulfur during the desulfurization process, resul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/027
CPCC01B17/027
Inventor 段超张睿齐小峰王红梅谢晓莉潘蕊娟
Owner XIAN ORIGIN CHEM TECH