Combined microbial desulfurization method and its technology for coal

Abstract

A combined desulfurization idea and process for coal removal, including the combination of high-efficiency core desulfurization bacteria agent and indigenous bacteria agent, as well as the combination of inorganic sulfur removal and organic sulfur removal technology, perfects the type and level of desulfurization, and can improve the desulfurization speed and efficiency. This invention considers and analyzes the differences in the state and content of sulfur in different coals, screens the indigenous microbial communities in the treated coal, and increases the local microbial populations’ influence on the core desulfurizing bacteria when the desulfurizing agents are expanded and applied in batches. Ecological support to form a combined desulfurization bacteria agent that is really suitable for the coal to be treated; at the same time, through the design and transformation of the traditional heap leaching method, the inorganic sulfur (mainly pyrite sulfur and elemental sulfur) and organic sulfur ( Dibenzothiophenes) are oxidized and decomposed into sulfuric acid by stage microorganisms and collected, so as to achieve the purpose of desulfurization. The combined microbial desulfurization method adopted in the present invention is a new technology pioneered at home and abroad.

Description

1. Technical field [0001] The invention belongs to the field of environmental protection, and relates to a combined desulfurization bacterial agent and process for removing inorganic sulfur and organic sulfur in coal, and specifically relates to the screening of specific indigenous microorganisms according to the principle of microbial ecology and according to the different occurrence states of sulfur in coal Combined with high-efficiency desulfurization core microorganisms to construct a combined bacterial agent and combined process for removing inorganic sulfur and organic sulfur in coal. 2. Background technology [0002] my country is a country rich in coal resources, and is the largest coal producer and consumer in the world. Its coal consumption accounts for about 70% of primary energy. However, there are large reserves of high-sulfur coal in my country's coal, and organic sulfur accounts for 34%-40% of the total sulfur in coal seam coal reserves, so coal burning also b...

AI Technical Summary

Problems solved by technology

At present, there are some problems such as: the reproduction speed of the existing desulfurization microorganisms is slow, and the desulfurization speed is slow, so the desulfurization efficiency is not high, which restricts the industrial scale-up and promotion of coal microbial desulfurization technology; secondly, although some bacteria that can remove thiophene sulfur have been found However, due to the complex forms of organic sulfur in coal and the large differences, it is difficult for a single microbial agent to adapt to the complex environment of various coal changes. strains to improve desulfurization efficiency

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