Solar cooperative two-step biomass spiral baking pretreatment method and apparatus thereof

A pretreatment device, biomass technology, applied in the directions of biofuel, waste fuel, energy input, etc., can solve the problems of prolonging residence time, reducing production efficiency, increasing cost, etc., to improve energy utilization, improve production efficiency, The effect of reducing dwell time

Inactive Publication Date: 2017-07-11
SOUTH CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The presence of moisture in biomass increases its specific heat capacity, prolongs the residence time of biomass in the torrefaction reactor, and reduces production efficiency. In addition, the evaporation of water in the initial stage of torrefaction takes place first, forming a certain The partial pressure interferes with the precipitation of roasted volatiles of the three components of hemicellulose, cellulose and lignin, which affects the process of the roasting reaction and the quality of the product
Biomass roasting by low-temperature pyrolysis i

Method used

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  • Solar cooperative two-step biomass spiral baking pretreatment method and apparatus thereof
  • Solar cooperative two-step biomass spiral baking pretreatment method and apparatus thereof
  • Solar cooperative two-step biomass spiral baking pretreatment method and apparatus thereof

Examples

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[0046] Example 1

[0047] A solar energy cooperative two-step biomass spiral roasting pretreatment method includes the following steps:

[0048] S1. Use solar energy as an auxiliary heat source to synergize with the combustion of baking volatiles for biomass baking pretreatment. Specifically, the corn stalks (with a size of 30 mm or less) after a moisture content of 15% and a size treatment (cut off) are dried and dehydrated (The temperature of drying and dewatering is 120℃, and the residual moisture of corn stover is 2.5-3%), and the feed rate is 5kg / h;

[0049] S2. Use diesel combustion to preheat the biomass spiral roasting reactor to 260°C, and send the dried and dehydrated corn stalks into the biomass spiral roasting reactor for roasting reaction. After roasting volatiles can be ignited, stop the diesel burning After cooling, the solid phase product obtained after baking can be stored or used for the next level application. The baking volatiles are mixed with air for combustion...

Example Embodiment

[0051] Example 2

[0052] A solar energy cooperative two-step biomass spiral roasting pretreatment method includes the following steps:

[0053] S1. Use solar energy as an auxiliary heat source to synergize with the combustion of roasting volatiles for biomass roasting pretreatment. Specifically, the rice husk (with a size of 30 mm or less) after a moisture content of 14% and size treatment (cut off) is dried and dehydrated (The temperature of drying and dehydration is 125℃, and the residual moisture of rice husk is 4~5%), and the feed rate is 4.8kg / h;

[0054] S2. Use diesel combustion to preheat the biomass spiral roasting reactor to 300℃, and send the dried and dehydrated rice husks into the biomass spiral roasting reactor for roasting reaction. After roasting volatiles can be ignited, stop diesel burning After cooling, the solid phase product obtained after baking can be stored or used for the next level of application. The baking volatiles are mixed with air for combustion, and...

Example Embodiment

[0056] Example 3

[0057] A solar energy cooperative two-step biomass spiral roasting pretreatment method includes the following steps:

[0058] S1. Use solar energy as an auxiliary heat source and synergize with the burning of baking volatiles for biomass baking pretreatment. Specifically, the oil-tea camellia shell with a moisture content of 15% is dried and dehydrated (the temperature of drying and dehydration is 130°C, and the residual moisture of the camellia shell 1.5~2.5%), the feed rate is 4kg / h;

[0059] S2. Use diesel combustion to preheat the biomass spiral roasting reactor to 330°C, and send the dried and dehydrated camellia husks into the biomass spiral roasting reactor for roasting reaction. After roasting volatiles can ignite, stop diesel burning After cooling, the solid phase product obtained after baking can be stored or used for the next level application. The baking volatiles are mixed with air for combustion, and the high-temperature hot flue gas produced by the ...

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Abstract

The invention provides a solar cooperative two-step biomass spiral baking pretreatment method and an apparatus thereof. The method comprises the following steps: carrying out drying dehydration on biomasses by using solar energy as an auxiliary heat source and cooperating with baking volatile matter combustion; preheating a biomass spiral baking reactor by using conventional energy, sending the dehydrated biomasses into the biomass spiral baking reactor, carrying out a baking reaction, stopping the convectional energy when the baking volatile matters are ignited, mixing the baking volatile matter with air to combust, blending high-temperature hot smoke generated during the combustion with the air to reach a preset temperature biomass, providing heat for the baking reaction, carrying out heat exchange on the heat-exchanged medium-temperature smoke and air, completely discharging the smoke, and carrying out drying dehydration on the biomasses by the heated air. The baking process is divided into drying dehydration and low-temperature pyrolysis, the biomasses are dried to remove water, the specific heat capacity of the material is reduced to facilitate material heating and precipitation of the baking volatile matter, and the solar energy is combined to realize biomass baking pretreatment customized production with wide biomass material adaptability.

Description

technical field [0001] The present invention relates to the field of biomass energy, more specifically, to a method and device for pretreatment of biomass spiral roasting with solar energy synergy two-step method. Background technique [0002] The development of the global economy, the growth of population and the improvement of living standards have resulted in a sharp increase in energy demand. At the same time, it has also led to the depletion of conventional energy and the increasingly serious environmental pollution. Biomass energy is the largest renewable energy and the only renewable carbon source. Its effective use can replace conventional energy, alleviate pollution and reduce greenhouse gas emissions. Through technologies such as combustion, gasification, pyrolysis, anaerobic fermentation, transesterification and compact molding, biomass can be converted into heat and gas, bio-oil and charcoal three-phase products and solid particle fuels, as energy, chemical and e...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10B57/10C10B49/02
CPCC10B49/02C10B53/02C10B57/10Y02E50/10Y02E50/30Y02P20/133
Inventor 蒋恩臣王明峰任永志许细薇吕娟简秀梅胡志锋
Owner SOUTH CHINA AGRI UNIV
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