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Method for preparing biomass fuel by pyrolysis liquefaction of biomass

A biomass fuel and biomass raw material technology, applied in the preparation of biological raw materials, liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problems that biomass oil cannot be used directly, affect the process yield, blockage, etc., and achieve good industrialization Foreground, increase product yield, effect of simple process

Active Publication Date: 2014-03-12
COWAY INT TECHTRANS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the rapid pyrolysis process of biomass, the temperature at which the pyrolysis products leave the reactor is generally 400-500°C. At this time, most of the pyrolysis products are gaseous. In the subsequent process, these gaseous products will be condensed together with solid particles. Scaling on the surface of pipelines and equipment will cause blockage, which will affect the continuous operation of the process, which is not conducive to the industrialization of the technology, and will also affect the process yield.
[0005] In addition, in the prior art, there are still some problems in biomass pyrolysis technology, for example, the production cost of biomass oil is usually higher than that of mineral oil, and biomass oil cannot be directly used in existing power equipment, this is because Biomass oils are mostly hydrocarbons with unstable physical and chemical properties, which must be modified and / or refined before they can be used

Method used

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  • Method for preparing biomass fuel by pyrolysis liquefaction of biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The pyrolysis liquefaction of embodiment 1 bagasse

[0029] A certain amount of bagasse is dried to a water content lower than 10wt%, then crushed and sieved to obtain 30 grams of solid particles below 50 mesh (300 microns); the solid particles are mixed with 120 grams of washing oil and 1 gram of Na 2 CO 3 Stir and mix evenly in the container; add the obtained reaction mixture into a 0.5-liter stainless steel reaction kettle, heat up to 230°C under stirring conditions, the stirring speed used is 300 rpm, and the residence time of the reaction mixture in the reaction kettle The time is 3 hours, and the biomass oil obtained by pyrolysis and liquefaction is separated by rectification to obtain 3.45 grams of biomass light oil, 75 grams of biomass diesel oil and 70 grams of biomass heavy oil. It can be known from calculation that the yield of the pyrolysis liquefaction product in this embodiment is about 98.97%. In addition, it has been measured that the calorific value o...

Embodiment 2

[0030] The pyrolysis liquefaction of embodiment 2 corn cobs

[0031]Dry a certain amount of corncobs until the water content is lower than 10wt%, then crush and sieve to obtain 30 grams of solid particles below 70 mesh (200 microns); mix the solid particles with 120 grams of anthracene oil and 1.2 grams of CaCO 3 Stir and mix evenly in the container; add the resulting reaction mixture into a 0.5-liter stainless steel reactor, and heat it up to 260°C under stirring conditions. The stirring speed used is 200 rpm, and the reaction mixture stays in the reactor The time is 2.5 hours, and the biomass oil obtained by pyrolysis and liquefaction is separated by rectification to obtain 3.05 grams of biomass light oil, 70 grams of biomass diesel oil and 74 grams of biomass heavy oil. It can be known from calculation that the yield of the pyrolysis liquefaction product in this embodiment is about 98.03%. In addition, it has been measured that the calorific value of the obtained three bio...

Embodiment 3

[0032] Example 3 Pyrolysis and liquefaction of cotton stalks

[0033] Dry a certain amount of cotton stalks until the water content is lower than 10wt%, then crush and sieve to obtain 30 grams of solid particles below 60 mesh (250 microns); mix the solid particles with 120 grams of washing oil and 0.6 grams of K 2 CO 3 Stir and mix evenly in the container; add the resulting reaction mixture into a 0.5-liter stainless steel reactor, and heat it up to 240°C under stirring conditions. The stirring speed used is 350 rpm, and the reaction mixture stays in the reactor The time is 4 hours, and the biomass oil obtained by pyrolysis and liquefaction is separated by rectification to obtain 2.95 grams of biomass light oil, 69 grams of biomass diesel oil and 72 grams of biomass heavy oil. It can be known by calculation that the yield of the pyrolysis liquefaction product in this embodiment is about 95.97%. In addition, it has been measured that the calorific value of the obtained three ...

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Abstract

A method for preparing biomass fuel by pyrolyzing and liquefying biomass is provided, which comprises making the biomass raw material particles be pyrolyzed and liquefied at a temperature of 200-300? and a pressure of 1-6 atmosphere in the liquid fuel solvent in the presence of alkaline catalyst, and separating the obtained product into biomass fuel product with different boiling ranges.

Description

technical field [0001] The present invention relates to the further development and utilization of biomass raw materials, especially biomass waste, and specifically relates to a method for pyrolyzing and liquefying biomass raw materials to prepare biomass fuels. The biomass fuels include biomass light oil, biomass Diesel and biomass heavy oil. Background technique [0002] In my country's industrial background, there are a large amount of biomass waste, such as bagasse, distiller's grains, cassava residue, rice straw, wheat straw, bean stalk, cotton stalk, corn stalk, corn cob, fallen leaves and wood chips. Material waste usually contains a large amount of macromolecular substances such as lignin, cellulose, hemicellulose and starch that can be further utilized. In recent years, under the background of green and low carbon, the further development and utilization of these biomass wastes have attracted more and more attention. [0003] Biomass pyrolysis is a thermochemical m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1011C10G1/02C10G1/083C10G1/086Y02P30/20
Inventor 谭鸿鑫段占庭
Owner COWAY INT TECHTRANS