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Process for stage-by-stage biological dump leaching desulfurization of high-sulfur-content coal mine

A technology of biological piles and coal mines, applied in the petroleum industry, solid fuels, fuels, etc., can solve the problems of unrealized large-scale industrial applications, and achieve the effects of expanding the scope of resource utilization, broad application prospects, and short processes

Active Publication Date: 2017-06-13
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology

[0005] In recent years, great breakthroughs have been made in the research and development of coal mine biological desulfurization technology, but it is still in the laboratory research stage and has not yet achieved large-scale industrial application

Method used

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Embodiment 1

[0059] The coal used is from a sulfur-containing coal mine in Inner Mongolia. The sulfur in the coal is mainly in the form of pyrite, followed by organic sulfur, and less sulfur in the form of sulfate. The specific content is shown in Table 1.

[0060] Table 1 Sulfur content in coal mine

[0061] Total sulfur Pyrite Sulfur Organic sulfur Sulfate Sulfur Content / wt%3.182.330.780.28

[0062] The total sulfur in the coal mine is 3.18%, and the organic sulfur content is relatively high, reaching 0.78%, which is a high-sulfur and difficult-to-treat coal mine.

[0063] The inorganic sulfur and organic sulfur oxidizing bacteria cultivated in the laboratory are scaled up and cultivated step by step, from 200mL to 1000m through 5 stages. 3 Above, the bacterial concentration is 10 8 Pcs / m 3 the above.

[0064] Use acidic water with a pH value of 1.5 for acid balance for the built coal mine. The acid balance period is 10-15 days. After the pH value is basically stabilized below 1.5, connect th...

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Abstract

The invention provides a process for stage-by-stage biological dump leaching desulfurization of a high-sulfur-content coal mine. By stage-by-stage biological dump leaching removal of inorganic sulfur and organic sulfur, the process comprises the following steps: dump making, acid balancing, inorganic sulfur removal, neutralization of leachate and organic sulfur removal. The method can fulfill the aim of effectively removing sulfur from the high-sulfur-content coal mine. Compared with conventional physical and chemical methods, the method has the advantages of mild condition, low cost, zero discharge of harmful gas and the like, and has a wide application prospect in the field of coal mine desulfurization.

Description

Technical field [0001] The invention relates to the technical field of biological hydrometallurgy, in particular to segmented access to inorganic sulfur and organic sulfur oxidizing bacteria, which is applied to the bioheap leaching process of high-sulfur coal mines, and finally achieves efficient sulfur removal. Background technique [0002] Coal is the main energy source in our country, and the sulfur dioxide released by the combustion of coal seriously pollutes the environment. As coal is gradually mined in depth, the sulfur content will increase, especially the coal produced in North China will gradually become high-sulfur coal. The development of economical and effective desulfurization technology has become one of the most urgent tasks today, which is of great significance for improving the efficiency of coal utilization and improving the ecological environment. At present, there are physical methods, chemical methods, microbial desulfurization methods and microbial-flotat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/02
CPCC10L9/02
Inventor 武彪尚鹤莫晓兰温建康
Owner 有研资源环境技术研究院(北京)有限公司
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