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Biomass granular fuel and preparation method thereof

A technology of biomass particles and biomass raw materials, applied in the direction of biofuels, waste fuels, fuels, etc., can solve the problems of easy slagging and insufficient combustion, prolong the burning time, fully burn, and improve ash accumulation and slagging problem effect

Active Publication Date: 2018-10-12
湖北和泰生物能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a biomass pellet fuel and its preparation method, and solve the technical problems that the biomass pellet fuel is prone to slagging and insufficient combustion in the combustion process in the prior art

Method used

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Examples

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preparation example Construction

[0015] This embodiment also provides a method for preparing biomass pellet fuel, which includes the following steps:

[0016] (1) The pine sawdust, straw, and plant shells are cleaned to remove impurities and then crushed to obtain biomass raw materials with a particle size of ≤15mm, and the biomass raw materials are dried to make the moisture content less than 8%;

[0017] (2) Crush chitosan, calcium oxide and urea to a particle size of 0.5mm, then add them to the dried biomass raw material, stir and mix evenly; the particle size of chitosan, calcium oxide and urea is less than 0.5mm , Additives are easier to be evenly mixed with biomass raw materials, and the effect is better under the condition of ensuring less dosage;

[0018] (3) The mixed biomass raw materials and additives are extruded and pelletized under the conditions of a temperature of 80-100°C and a pressure of 50-150Mpa, and the biomass pellet fuel is obtained after cooling.

[0019] The chemical components of biomass ra...

Embodiment 1

[0023] This embodiment provides a biomass pellet fuel prepared by mixing 100 kg of pine wood chips and 0.5 kg of additives. The additives are a mixture of chitosan, calcium oxide and urea, and the weight of the additives is 0.5 of the weight of the biomass raw material. %.

[0024] This embodiment also provides a method for preparing the above biomass pellet fuel:

[0025] (1) The pine sawdust is cleaned to remove impurities and then crushed to obtain a biomass raw material with a particle size of ≤15mm, and the pine sawdust is dried to make its moisture content less than 8%;

[0026] (2) Weigh 0.09 kg of chitosan, 0.33 kg of calcium oxide and 0.08 kg of urea, mix them and pulverize them to a particle size of 0.5 mm or less, then add them to the dried pine wood chips in step (1), and stir and mix them evenly;

[0027] (3) The mixed pine wood chips, chitosan, calcium oxide and urea are extruded and pelletized under the conditions of a temperature of 80° C. and a pressure of 100 Mpa, an...

Embodiment 2

[0029] This embodiment provides a biomass pellet fuel prepared by mixing 100 kilograms of pine sawdust and rice straw and 1.5 kilograms of additives. The additives are a mixture of chitosan, calcium oxide and urea. The weight of the additives is for living 1.5% of the weight of the raw material.

[0030] This embodiment also provides a method for preparing the above biomass pellet fuel:

[0031] (1) The pine sawdust and rice straw are cleaned to remove impurities and then crushed to obtain biomass raw materials with a particle size of ≤15mm. The pine sawdust and rice straw are dried to make the moisture content less than 8%;

[0032] (2) Weigh 0.45 kg of chitosan, 0.825 kg of calcium oxide and 0.225 kg of urea, mix them and crush them to a particle size of 0.5 mm, then add them to the dried pine wood chips and rice straws in step (1), and stir. well mixed;

[0033] (3) The mixed pine wood chips, rice straw, chitosan, calcium oxide and urea are extruded and pelletized at a temperature...

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Abstract

The invention discloses a biomass granular fuel. The fuel comprises a biomass raw material and an additive, wherein the additive is a mixture of chitosan, calcium oxide and urea, and a weight of the additive is 0.5-4.8% of a weight of the biomass raw material. According to the fuel disclosed by the invention, a certain amount of chitosan, calcium oxide and urea are added into the biomass raw material as the additive, so that alkali metal elements in the biomass granular fuel can be fixed, and the problems of dust accumulation and slagging caused by alkali metals contained in the biomass granular fuel can be effectively improved; and addition of the chitosan, the calcium oxide and the urea can increase a contact area of the biomass granular fuel and oxygen, make a combustion reaction more sufficient, and prolong burning time, thereby improving burning efficiency. The invention also provides a preparation method of the biomass granular fuel.

Description

Technical field [0001] The invention belongs to the field of biomass fuel, and particularly relates to a biomass pellet fuel and a preparation method thereof. Background technique [0002] Using wood chips, bamboo chips, branches, straws, plant shells, etc. as raw materials, through professional machinery, special processes, without any chemical additives, high-pressure and low-temperature compression molding particulate fuel is collectively called biomass pellet fuel. Biomass pellet fuel has high calorific value, is clean and pollution-free, and is a high-tech environmentally friendly product that replaces fossil energy. CO released by biomass pellet fuel during combustion 2 Roughly equivalent to the CO absorbed by photosynthesis during growth 2 , So the greenhouse gas CO of biomass particles 2 It is zero emission. Biomass fuel is a renewable energy source. As long as there is sunlight, the photosynthesis of green plants will not stop, biomass energy will not be exhausted, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44C10L9/10C10L10/06
CPCC10L5/442C10L5/445C10L9/10C10L10/06C10L2230/22C10L2290/08C10L2290/24C10L2290/28C10L2290/32Y02E50/10Y02E50/30
Inventor 李善学刘新华李治国吕桂生李幼金
Owner 湖北和泰生物能源有限公司
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