Search

CN-121991733-A - Biomass particle fuel and preparation method and application thereof

CN121991733ACN 121991733 ACN121991733 ACN 121991733ACN-121991733-A

Abstract

The invention relates to the technical field of biomass pellet fuels, and mainly relates to a biomass pellet fuel, a preparation method and application thereof, wherein the biomass pellet fuel comprises, by mass, 50% -70% of eucalyptus bark, 10% -25% of sugarcane stalks and 15% -30% of bagasse. The biomass granular fuel is prepared by compounding the eucalyptus bark, the sugarcane straw and the bagasse as raw materials, has high combustion efficiency, excellent mechanical strength and lower ash content, and is more suitable for a process for preparing methanol from biomass. When the biomass pellet fuel is applied to the biomass gasified methanol process, the high mechanical strength ensures that the pellet fuel keeps complete form in the combustion process, and can reduce the carry-over of fly ash and fine powder, thereby improving the carbon conversion rate and the yield of effective gas.

Inventors

  • Dou Pingguo
  • SHI YANGHUI
  • WANG BIHUI
  • CAI LEI
  • LIAN HUAJUN

Assignees

  • 中集绿能低碳科技(广东)有限公司
  • 中集绿能低碳科技(湛江)有限公司
  • 中集安瑞科投资控股（深圳）有限公司
  • 中国国际海运集装箱(集团)股份有限公司

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. The biomass pellet fuel is characterized by comprising, by mass, 50% -70% of eucalyptus bark, 10% -25% of sugarcane straw and 15% -30% of bagasse.
  2. 2. The biomass pellet fuel as claimed in claim 1, wherein, The particle size of eucalyptus bark, sugarcane straw and bagasse is 1 mm-5 mm; The biomass pellet fuel is cylindrical, the particle diameter of the biomass pellet fuel is 6 mm-10 mm, and the particle length is 10 mm-30 mm.
  3. 3. A method for preparing the biomass pellet fuel according to any one of claims 1 to 2, comprising the steps of: Drying and crushing eucalyptus bark, sugarcane stalk and bagasse; Weighing 50% -70% of eucalyptus bark, 10% -25% of sugarcane stalk and 15% -30% of bagasse after drying and crushing according to mass percentage, and putting into a mixer for mixing to obtain a mixture; Putting the mixture into extrusion granulating equipment, and performing extrusion granulating under the conditions of 100-130 ℃ and 8-12 MPa to obtain granules; And cooling and screening the particulate matters to obtain the biomass particulate fuel.
  4. 4. The method for preparing biomass pellet fuel according to claim 3, wherein in the step of drying eucalyptus bark, sugarcane stalk and bagasse, the water content of the eucalyptus bark, sugarcane stalk and bagasse is reduced to 8% -15%, and the drying temperature is 80 ℃ -120 ℃.
  5. 5. The method for preparing biomass pellet fuel according to claim 3, wherein after the eucalyptus bark, the sugarcane stalk and the bagasse are crushed, the particle size of the eucalyptus bark, the sugarcane stalk and the bagasse is 1 mm-5 mm.
  6. 6. The method for preparing biomass pellet fuel according to claim 3, wherein, And adding 50% -70% of eucalyptus bark, 10% -25% of sugarcane straw and 15% -30% of bagasse into a mixer to mix for 15-30 min, wherein the stirring speed is 200-300 r/min.
  7. 7. The method for preparing biomass pellet fuel according to claim 3, wherein, The particle is cylindric, the particle diameter of particle is 6mm ~10mm, and granule length is 10mm ~30mm.
  8. 8. The method for preparing biomass pellet fuel according to claim 3, wherein, The particles are placed in cooling equipment for cooling, the cooling time is 20-40min, the temperature after cooling is less than or equal to 35 ℃, and the moisture content after cooling is 8-12%.
  9. 9. The method for preparing biomass pellet fuel according to claim 3, wherein, And conveying the unqualified particles obtained after the particles are cooled and sieved to the step of crushing the eucalyptus bark, the sugarcane stalk and the bagasse.
  10. 10. Use of the biomass pellet fuel as claimed in claim 1 or 2, wherein the biomass pellet fuel is applied to biomass for methanol production.

Description

Biomass particle fuel and preparation method and application thereof Technical Field The invention relates to the technical field of biomass pellet fuels, and mainly relates to a biomass pellet fuel, a preparation method and application thereof. Background Compared with primary energy sources such as coal, petroleum, natural gas and the like, the biomass resource has the advantages of being renewable, small in pollution, carbon-reducing and the like. The biomass pellet fuel can be prepared by crushing, mixing and other agricultural forestry wastes such as straws, saw dust and the like, and has the characteristics of high combustion efficiency, convenience in storage and transportation, low pollutant discharge and the like. In order to improve the resource utilization rate, biomass pellet fuel is used for synthesizing methanol. At present, biomass pellet fuels are mainly prepared from a single raw material, for example, pure sugarcane leaves are used for preparing pellet fuels, and the combustion efficiency is high, but loose pellet forms formed after the sugarcane leaves are prepared into biomass pellet fuels are easy to cause uneven contact with an oxidant during gasification, and if the biomass pellet fuels are used as raw materials for preparing methanol through gasification, severe fluctuation of synthesis gas components can be caused, so that the operation of subsequent sulfur-tolerant shift and methanol synthesis procedures is influenced. In addition, the pure bagasse can also be used as a raw material of biomass pellet fuels, but the biomass pellet fuels with excellent performance are difficult to prepare due to the small density of the pellet fuels of the sugarcane and low storage and transportation efficiency. Disclosure of Invention The invention aims to provide a biomass pellet fuel, a preparation method and application thereof, wherein the biomass pellet fuel is prepared by compounding eucalyptus bark, sugarcane leaf stalk and bagasse together so as to improve the performance of the biomass pellet fuel in preparing methanol by biomass gasification. In order to solve the problems, the invention provides a biomass pellet fuel which comprises, by mass, 50% -70% of eucalyptus bark, 10% -25% of sugarcane stalk and 15% -30% of bagasse. In one embodiment, the particle sizes of the eucalyptus bark, the sugarcane straw and the bagasse are 1 mm-5 mm. In one embodiment, the biomass pellet fuel is cylindrical, the particle diameter of the biomass pellet fuel is 6 mm-10 mm, and the particle length is 10 mm-30 mm. A second aspect of the present invention provides a method for preparing a biomass pellet fuel according to any of the above embodiments, comprising the steps of: Drying and crushing eucalyptus bark, sugarcane stalk and bagasse; Weighing 50% -70% of eucalyptus bark, 10% -25% of sugarcane stalk and 15% -30% of bagasse after drying and crushing according to mass percentage, and putting into a mixer for mixing to obtain a mixture; Putting the mixture into extrusion granulating equipment, and performing extrusion granulating under the conditions of 100-130 ℃ and 8-12 MPa to obtain granules; And cooling and screening the particulate matters to obtain the biomass particulate fuel. In one embodiment, in the step of drying the eucalyptus bark, the sugarcane stalk and the bagasse, the water content of the eucalyptus bark, the sugarcane stalk and the bagasse is reduced to 8% -15%, and the drying temperature is 80 ℃ -120 ℃. In one embodiment, after the eucalyptus bark, the sugarcane stalk and the bagasse are crushed, the particle size of the eucalyptus bark, the sugarcane stalk and the bagasse is 1 mm-5 mm. In one embodiment, 50% -70% of eucalyptus bark, 10% -25% of sugarcane stalks and 15% -30% of bagasse are put into a mixer to be mixed for 15-30 min, and the stirring speed is 200-300 r/min. In one embodiment, the particles are cylindrical, the particle diameter of the particles is 6 mm-10 mm, and the particle length is 10 mm-30 mm. In one embodiment, the particles are placed in a cooling device for cooling, the cooling time is 20-40 min, the temperature after cooling is less than or equal to 35 ℃, and the moisture content after cooling is 8-12%. In one embodiment, the reject particles obtained after cooling and sieving the particles are fed to the step of comminuting eucalyptus bark, sugar cane stalks and bagasse. A third aspect of the invention provides the use of a biomass pellet fuel as described in any one of the embodiments above for the preparation of methanol from biomass. According to the technical scheme, the biomass granular fuel has the advantages and positive effects that the biomass granular fuel is prepared by compounding the eucalyptus bark, the sugarcane straw and the bagasse as raw materials, has high combustion efficiency and excellent mechanical strength, has lower ash content, and is more suitable for a process for preparing methanol from biomass. The biomass pellet fuel has the characte