A process for biological desulfurization of high-sulfur coal mines using exclusive desulfurization mixed bacteria

A technology of biological desulfurization and mixed bacteria, which is applied in the field of biological desulfurization of high-sulfur coal mines, can solve the problems of low removal rate, high cost, destruction of chemical structure and performance, etc., and achieves broad application prospects, low cost, and expanded resource utilization. range effect

Active Publication Date: 2018-03-16
有研资源环境技术研究院(北京)有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The physical method can only remove inorganic sulfur in coal, and the removal rate is not high; the chemical method has certain damage to the structural properties of coal and the cost is high; the microbial-flotation method uses microorganisms to modify the surface of pyrite , to separate coal from pyrite by flotation, which can only remove pyrite sulfur

Method used

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  • A process for biological desulfurization of high-sulfur coal mines using exclusive desulfurization mixed bacteria
  • A process for biological desulfurization of high-sulfur coal mines using exclusive desulfurization mixed bacteria

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Effect test

Embodiment 1

[0032] The coal ore used comes from a sulfur-containing coal mine in Inner Mongolia. The sulfur in the coal ore mainly exists in the form of pyrite, followed by organic sulfur, and the sulfur in the form of sulfate is less. The specific content is shown in Table 1.

[0033] Table 1 Sulfur content in coal mines

[0034]

Total sulfur

pyrite sulfur

organic sulfur

sulfate sulfur

Content / wt%

3.35

2.21

0.82

0.32

[0035] (1) Stacking and paving

[0036] Before the ore is piled up, operations such as leveling and compaction of the stockyard, anti-seepage bottom pad, and pipeline laying are required; among them, the thickness of the anti-seepage clay layer is not less than 120mm, and the thickness of the ore buffer layer is not less than 800mm. The specific laying procedure is: anti-seepage clay layer-HDPE waterproof layer-fine sand layer-ore buffer layer (buried immersion liquid collection pipe at the same time) and inflatable pipe. ...

Embodiment 2

[0047] The coal ore used comes from a sulfur-bearing coal mine in Outer Mongolia. The sulfur in the coal ore mainly exists in the form of pyrite, followed by organic sulfur and sulfate. The specific content is shown in Table 2.

[0048] Table 2 Sulfur content in coal mines

[0049]

Total sulfur

pyrite sulfur

organic sulfur

sulfate sulfur

Content / wt%

3.02

1.58

0.63

0.81

[0050] (1) Stacking and paving

[0051] Before the ore is piled up, operations such as leveling and compaction of the storage yard, anti-seepage pad, and pipeline laying are required; among them, the thickness of the anti-seepage clay layer is 140mm, and the thickness of the ore buffer layer is 850mm. The specific laying procedure is: anti-seepage clay layer-HDPE waterproof layer-fine sand layer-ore buffer layer (buried immersion liquid collection pipe at the same time) and inflatable pipe. The bottom pad of the yard is generally composed of three parts: the f...

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Abstract

A process for biological desulfurization of high-sulfur coal mines using exclusive desulfurization mixed bacteria, which includes: crushing the ore to -25mm to build a heap, the height of the heap is 8-10m, and burying temperature and gas composition sensing devices during the heap; Carry out spraying operation, the spraying intensity is 10~15L / (m2 h), the spraying liquid contains 107~108cfu / mL exclusive desulfurization mixed bacteria CGMCC NO.8336, and the redox potential of the spraying liquid is greater than 700mV ( SCE), according to the spraying system of spraying for 7 days and resting for 5 days or spraying for 7 days and resting for 7 days, the temperature in the pile is controlled at 45-60°C, and the pH value of the leaching system is 1.5-1.8. The process is short, simple in equipment, low in investment, low in cost, and non-polluting. The production scale can be large or small. It can process high-sulfur coal resources that cannot be processed by traditional dressing and smelting processes. It can expand the scope of resource utilization and improve the comprehensiveness of coal resources. recovery level.

Description

technical field [0001] The invention relates to a process for removing sulfur in high-sulfur coal mines by using microorganisms, in particular to a biological desulfurization process for high-sulfur coal mines using a special desulfurization mixed bacteria. Background technique [0002] Coal is the main energy source in our country, and the sulfur dioxide released from coal combustion seriously pollutes the environment. The average sulfur content of coal in my country is about 1.61wt%, and the sulfur content spans a large range, from ultra-low sulfur coal with a sulfur content of 0.04wt% to high-sulfur coal with a sulfur content of 9.62wt%. The sulfur content of coal in the northern region is low, and the medium and high sulfur coal with a sulfur content greater than 2.0wt% are more distributed in the south and southwest regions. The sulfur content of deep coal seams in the same area is higher than that of shallow coal seams. As far as my country's high-sulfur coal is conce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C10L9/00C12R1/01
CPCC10L9/00C12N1/205C12R2001/01
Inventor 武彪尚鹤刘学温建康
Owner 有研资源环境技术研究院(北京)有限公司
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