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Quick thermal cracking technique and device of biomass with fused salt

A thermal cracking and biomass technology, applied in molten salt/molten metal gasification, chemical industry, sustainable manufacturing/processing, etc. Use performance, effect of continuous feeding

Active Publication Date: 2014-12-10
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the single function of heat carrier and relatively small heat content in the original thermal cracking technology, a process and device using rural waste as biomass raw material and molten salt as heat carrier, catalyst and dispersion medium were developed to improve Biomass utilization efficiency, maximizing the acquisition of target products

Method used

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  • Quick thermal cracking technique and device of biomass with fused salt
  • Quick thermal cracking technique and device of biomass with fused salt
  • Quick thermal cracking technique and device of biomass with fused salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] refer to figure 1 and figure 2 A process and device for co-producing bio-oil and biochar using crop stalks, the composition of molten salt is selected as ZnCl 2 / KCl (molar ratio is 7 / 6) molten salt system, the mass is 160kg; the biomass raw material used is rice straw, the mass is 4kg, and the particle size is 100 mesh; the thermal cracking temperature is 450°C; the pipeline control temperature is 450°C; vacuumize. The pyrolysis results obtained are as follows:

[0044] (1) Liquid phase yield The yield rate is 25wt.%. The elemental analysis of the liquid phase product is carried out with an elemental analyzer. The elemental composition is: C element 2.47%, H element 7.904%, N element 0.99%, S element 0.012% , O element 88.624%.

[0045] (2) The liquid phase product is GC7890A / MS5975C of Agilent Company (Santa Clara, CA), and the chromatographic column is Agilent 19091S-433; 325° C.; 30 m×250 μm×0.25 μm. The analysis conditions are: GC carrier gas is He; flow rate...

Embodiment 2

[0049] Select the molten salt composition as ZnCl 2 / KCl (molar ratio is 7 / 6) molten salt system, the mass is 166kg; the biomass raw material used is rice straw, the mass is 5kg, and the particle size is 100 mesh; the pyrolysis temperature is 450°C; the pipeline control temperature is 450°C; vacuumize. The pyrolysis results obtained are as follows:

[0050] (1) Liquid phase yield The yield is 30wt.%. The elemental analysis of the liquid phase product is carried out with an elemental analyzer. The elemental composition is: C element 1.92%, H element 4.46%, N element 0.73%, S element 0.045% , O element 92.85%.

[0051] (2) The GC / MS analysis results of the liquid phase products were: phenols 56.70%, aldehydes 30.29%, alcohols 1.20%, esters 9.39%, acids 2.40%.

[0052] (3) The gas phase product composition distribution in the cracking process is: H 2 1.81%~28.16%, CO4.12%~14.67%, CH 4 3.38%~8.70%, CO 2 62.99% to 87.14%.

[0053] (4) The element composition of the solid pro...

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Abstract

The invention relates to a quick thermal cracking technique and device of biomass with fused salt. An outlet tube of an RY fused salt pump is connected with an inlet tube of a hydrocyclone; an upper outlet tube of the hydrocyclone is connected with a solid product collector, and a lower outlet of the hydrocyclone is connected with an impact mixing frustum cracking reactor; the impact mixing frustum cracking reactor is connected with a biomass storage bin; an outlet of the impact mixing frustum cracking reactor is connected with a shell and tube condenser and a fuse salt storage tank; an outlet of the shell and tube condenser is connected with a liquid product collector; an outlet of the liquid product collector is respectively connected with a cracked gas storage tank and a cracked gas rinsing tank; and the upper part of the impact mixing frustum cracking reactor is connected with a motor. The device and technique provided by the invention overcome the defects of low heat utilization efficiency and high cost in the production process, enhance the yield of the biomass fuel, implement continuous feeding, and improve the service performance of biomass.

Description

technical field [0001] The invention relates to a technology and device for rapidly thermally cracking biomass with molten salt, using agricultural and forestry waste as biomass raw material. Background technique [0002] Energy crisis, environmental pollution and other problems are becoming more and more serious, and it is imminent to find clean and renewable energy. Among a series of renewable energy such as water energy, wind energy, solar energy, biomass energy and ocean energy, biomass energy has low pollution, renewable, CO 2 Nearly zero emissions, rich resources, wide distribution and other characteristics, are increasingly attracting attention from all over the world. my country is rich in biomass resources, and agricultural and forestry wastes account for a large proportion. The annual output of crop straw alone reaches 700 million tons, but the utilization rate of straw resources is relatively low, about 7%. Most straws are burned on the spot, which not only cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/57
CPCY02P20/10
Inventor 计建炳姬登祥于凤文艾宁高明辉盛佳峰姜洪涛
Owner ZHEJIANG UNIV OF TECH
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