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Process for preparing biomass briquette coal by dehydrating and upgrading lignite

A technology of biomass and lignite, applied in the direction of biofuel, waste fuel, petroleum industry, etc., can solve the problems of high production cost, low dehydration efficiency of lignite, and low utilization rate of biomass energy

Active Publication Date: 2017-05-17
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a process for preparing biomass briquettes by dehydration and upgrading of lignite to solve the problems of low dehydration efficiency of lignite, high production cost, low utilization rate of biomass energy, and non-environmental protection

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  • Process for preparing biomass briquette coal by dehydrating and upgrading lignite

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Effect test

Embodiment 1

[0030] A process for preparing biomass briquettes by dehydration and upgrading of lignite, using the preparation process to prepare biomass briquettes as follows:

[0031] S1. Raw material crushing operation: select lignite with a moisture content of 30%, and use a reversible impact hammer crusher to break and decompose the lignite through the two-end grinding process. After crushing and decomposing, the lignite particle size is 5mm; The mixture of corn stalks and cattle and sheep manure with less than 25% is crushed and decomposed, and the particle size of the crushed and decomposed particles is 7mm.

[0032] S2, primary mixing operation: mix lignite particles and biomass particles according to the mass ratio of 8:2, and then mix with a high-efficiency composite binder with a mass ratio of 10% of the mixture, feed the mixture into the screw feeder for primary mixing and Transport it outward; in addition, crush the wheat straw to a particle size of 7mm, add it to a 1% sodium h...

Embodiment 2

[0040] S1. Raw material crushing operation: select lignite with a moisture content of 30%, and use a reversible impact hammer crusher to break and decompose the lignite through the two-end grinding process. After crushing and decomposing, the lignite particle size is 5mm; The mixture of corn stalks and cattle and sheep manure with less than 25% is crushed and decomposed, and the particle size of the crushed and decomposed particles is 7mm.

[0041]S2, primary mixing operation: mix lignite particles and biomass particles according to the mass ratio of 7:3, and then mix with a high-efficiency composite binder with a mass ratio of 10% of the mixture, feed the mixture into the screw feeder for primary mixing and Transport it outward; in addition, crush the wheat straw to a particle size of 7mm, add it to a 1% sodium hydroxide solution at a mass ratio of 12%, and add 0.5% calcium chloride, 0.7% calcium hydroxide , heated at 76° C. for 2 h and filtered the viscous substance obtained...

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Abstract

The invention relates to a process for preparing biomass briquette coal by dehydrating and upgrading lignite. The preparation process comprises the following flows: raw material crushing operation: crushing the lignite and biomass; first-stage material mixing operation: performing first-stage mixing on the lignite, the biomass and efficient composite adhesive; airflow conveying operation: performing second-stage mixing and first-stage drying by using hot airflow; separating and stirring operation: performing third-stage mixing by using cyclone, separating wet air and spraying diesel; rotary drum drying operation: performing four-stage mixing and second-stage drying by using a rotary drum; forming operation: performing pressing formation and packaging. By the process for preparing the biomass briquette coal, multi-stage drying enables that the dehydrating and upgrading effects of the lignite are better and the treatment cost is reduced, and multi-stage mixing enables the raw materials to be mixed uniformly; the prepared biomass briquette coal has the characteristics of high strength, high water resistance, low transportation cost, high gasification efficiency and high combustion characteristic.

Description

technical field [0001] The invention relates to the fields of lignite upgrading and preparation of biological briquettes, in particular to a process for preparing biomass briquettes through dehydration and upgrading of lignite. Background technique [0002] Lignite is an abundant and widespread fossil resource in the world. my country has quite rich reserves of lignite resources. The third national carbon resource survey shows that the proven reserves of lignite in the country are as high as 131.142 billion tons, accounting for about 13% of the national coal reserves. . However, it is affected by its own characteristics such as high moisture content, high ash content, low calorific value, low ash melting point, poor thermal stability, and easy weathering and spontaneous combustion, which limits its scope of use and utilization. However, the traditional extensive lignite utilization (power generation) method will eventually threaten its limited resource attributes and deterio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/04C10L5/06C10L5/10C10L5/36C10L5/44
CPCY02E50/10Y02E50/30C10L5/04C10L5/06C10L5/105C10L5/363C10L5/442C10L5/445C10L5/447C10L2290/08C10L2290/24C10L2290/28C10L2290/32
Inventor 张鹏德桂夏辉张才德
Owner CHINA UNIV OF MINING & TECH
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