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System and method for improving slurry property of low order coal slurry

A technology of coal-water slurry and low-rank coal, which is applied in the system field of improving the slurryability of low-rank coal-water slurry, and can solve the problem of affecting cold gas efficiency, high coal consumption and oxygen consumption of coal-water slurry gasification, and low-concentration water-coal Increase transportation cost of pulp and other problems, achieve the effect of saving transportation cost, improving pulping performance, and small equipment modification

Inactive Publication Date: 2015-04-15
SHENMU ZHANGJIAMAO COAL MINING CO LTD OF SHAANXI COAL & CHEM IND GRP
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  • Description
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Problems solved by technology

[0006] (3) Low-concentration coal-water slurry increases transportation costs
[0007] (4) As coal water slurry for gasification, low concentration coal water slurry (less than 60%) leads to high coal consumption and oxygen consumption of coal water slurry gasification, which directly affects the efficiency of cold gas

Method used

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  • System and method for improving slurry property of low order coal slurry
  • System and method for improving slurry property of low order coal slurry
  • System and method for improving slurry property of low order coal slurry

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] Such as figure 1As shown, the equipment of the present invention includes a pulverizing system and a fine powder separation system. In the pulverizing system, a coal conveying belt 1 is included to transport raw coal through a bin belt conveyor. The coal conveying belt 1 is connected to a buffer bin 2, and the buffer bin 2 passes through The weighing coal feeder 3 is connected to the vertical mill 4, and the vertical mill 4 is connected to a vertical mill drying mechanism. The above-mentioned equipment constitutes two sets of vertical mill mechanisms, and the two sets of vertical mill mechanisms can respectively pulverize raw coal. Grinding and fine grinding. The vertical mill 4 is connected to the 1# pulse bag dust collector 5, and the 1# pulse bag dust collector 5 is connected to the large screw feeder 7 through the small screw feed...

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Abstract

The invention discloses a system and a method for improving slurry property of low order coal slurry. The system includes a powder making system and a fine powder separating system. The powder making system comprises two vertical mill mechanisms. The vertical mill mechanisms are connected with bucket elevators which are respectively connected with a coarse powder finished product cabin and a fine powder finished product cabin. The fine powder separating system comprises a buffering cabin connected with the fine powder finished product cabin. The buffering cabin is communicated with a first grader and a second grader in sequence. The first grader and the second grader are respectively communicated with a coarse powder collecting cabin and a super fine powder collecting cabin. The coarse powder finished product cabin is communicated with a slurry mixing system through a dense phase conveying device; and the fine buffering cabin is communicated with the slurry mixing system through a conveying belt. The method includes three parts of coarse powder preparation, fine powder separation and extraction, and high-density coal slurry preparation. By collocating proportion of coarse coal powder and fine coal powder, deposition efficiency of coal powder is improved, distribution of coal powder after being mixed is close to an Alfred model; and slurry property of low order coal slurry is improved through graduation.

Description

technical field [0001] The invention belongs to the technical field of coal-water slurry, and relates to a system and a method for improving the slurryability of low-order coal-water slurry. Background technique [0002] Coal is the main energy source in our country, and it will not change for a long time in the future. The country implements the clean coal plan and regards clean coal technology as an important means to improve coal utilization efficiency and reduce environmental pollution. urgent task ahead. Controlling energy saving and emission reduction in the process of coal utilization is an inevitable requirement and realistic choice for the implementation of sustainable development energy strategy. [0003] Shenfu coal is a high-quality thermal coal with low ash, ultra-low sulfur, low phosphorus, and medium to high calorific value. Shenfu Coalfield is one of the super large coalfields in my country, so promoting the rational utilization of Shenfu Coal and improvin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23K1/02
Inventor 方刚郭佐宁张建安李增林巨鹏何钊王渝岗王俊哲闫立仓方世剑
Owner SHENMU ZHANGJIAMAO COAL MINING CO LTD OF SHAANXI COAL & CHEM IND GRP
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