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Technology for processing pulverized lignite

A treatment process, lignite technology, applied in the drying of peat, petroleum industry, solid fuel, etc., can solve the problems of difficulty in meeting the quality requirements of various users, large greenhouse gas emissions, and difficulty in large-scale development and utilization. The effect of low process cost, high calorific value and high yield

Inactive Publication Date: 2014-08-13
QIANQIU ENERGY SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, the thermal efficiency of direct combustion of lignite is low, and the emission of greenhouse gases is also large, making it difficult to develop and utilize on a large scale
Furthermore, the conversion and utilization of lignite as a raw material is also limited, and lignite liquefaction, dry distillation and gasification all need to reduce the moisture in coal to less than 10%
If lignite is not upgraded, it will be difficult to meet the quality requirements of various users

Method used

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  • Technology for processing pulverized lignite
  • Technology for processing pulverized lignite
  • Technology for processing pulverized lignite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The processing technology of powdery lignite in the present embodiment may further comprise the steps:

[0055] 1) The powdery lignite is heated and dried in a twin-screw drying device to remove moisture. The heating temperature is 300°C and the temperature is kept for 2 hours;

[0056] 2) Then, when the lignite obtained in step 1) is naturally cooled to 100°C, the material is discharged;

[0057] 3) Mix the cooled lignite with a binder, stir evenly, and then press the ball into shape;

[0058] 4) Put the pellets into the fin reforming device, heat to 650°C, then keep the temperature for 2 hours, then cool the obtained coal to be reformed to 100°C, and discharge.

[0059] Wherein, in step 3), by weight, the addition ratio of lignite to binder is: 50 parts of lignite and 1 part of binder.

[0060] Wherein, by weight, the binder is made of 20 parts of PVFM solution, 2 parts of sodium humate, and 78 parts of water, wherein the PVFM solution includes: 4.85 parts of polyvi...

Embodiment 2

[0094] The processing technology of powdery lignite in the present embodiment may further comprise the steps:

[0095] 1) The powdery lignite is heated and dried in a twin-screw drying device to remove moisture. The heating temperature is 200°C and the temperature is kept for 3 hours;

[0096] 2) Then, when the lignite obtained in step 1) is naturally cooled to 80°C, the material is discharged;

[0097] 3) Mix the cooled lignite with a binder, stir evenly, and then press the ball into shape;

[0098] 4) Put the pellets into the fin reforming device, heat to 700°C, and then keep it warm for 2.5 hours, cool the obtained reformed coal to 100°C, and discharge.

[0099] Wherein, in step 3), by weight, the addition ratio of lignite and binder is: 50 parts of lignite and 50 parts of binder.

[0100] Wherein, by weight, the binder is made of 15 parts of PVFM solution, 4 parts of sodium humate, and 81 parts of water, wherein the PVFM solution includes: 5 parts of polyvinyl alcohol, 3...

Embodiment 3

[0102] The processing technology of powdery lignite in the present embodiment may further comprise the steps:

[0103] 1) The powdery lignite is heated and dried in a twin-screw drying device to remove moisture. The heating temperature is 300°C and the temperature is kept for 2.5 hours;

[0104] 2) Then, when the lignite obtained in step 1) is naturally cooled to 100°C, the material is discharged;

[0105] 3) Mix the cooled lignite with a binder, stir evenly, and then press the ball into shape;

[0106] 4) Put the pellets into the fin reforming device, heat to 650°C, then keep the temperature for 4 hours, then cool the obtained reformed coal to 100°C, and discharge.

[0107] Wherein, in step 3), by weight, the addition ratio of lignite and binder is: 80 parts of lignite and 30 parts of binder.

[0108] Wherein, by weight, the binder is made of 30 parts of PVFM solution, 2 parts of sodium humate, and 68 parts of water, wherein the PVFM solution includes: 2 parts of polyvinyl ...

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Abstract

A processing technique of pulverized lignite comprises the following steps: 1) heating pulverized lignite to 100°C-1000°C, and keeping the temperature for 1h~5h; 2) cooling the lignite obtained in Step 1) to be below 100°C; 3) adding a binder, mixing evenly, and forming; 4) heating the formed lignite to 100°C~1000°C, and keeping the temperature for 1h~5h.For the final product obtained through the processing technique of pulverized lignite according to the present invention, the low calorific value is greatly increased when compared with that of raw coal, and is increased to be more than 2 times as that of the raw coal not modified. Dehydration is almost completely performed, the volatile matter is dramatically reduced, the content of fixed carbon is increased dramatically, and the yield of condensed water is high. Compared with the prior art, the processing technique of the present invention has lower cost, and obtains the product not only easy to transport but also having the high calorific value.

Description

technical field [0001] The invention relates to the technical field of pulverized lignite treatment, in particular to a pulverized lignite treatment process with low cost and good treatment effect. Background technique [0002] Lignite, also known as firewood coal, is the coal with the lowest degree of coalification, accounting for about 40% of global coal reserves and 13% of China's coal reserves. Low calorific value, easy weathering and spontaneous combustion, high transportation cost per unit of energy, not conducive to long-distance transportation and storage, which restricts the application and development of lignite. In some countries and regions, such as Victoria, Australia, most of its lignite has a powdery microstructure, high water content, and a high spontaneous combustion index. If it is not treated, it is difficult to export to other countries or regions through long-distance transportation. The pulverized lignite mentioned here refers to: under normal circumst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/00C10L5/04C10L5/10C10L5/28C10L9/00
CPCC10L9/08C10F5/06C10L5/10C10L2290/06
Inventor 李柏荣
Owner QIANQIU ENERGY SHANGHAI
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