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CN-122012151-A - Anti-sintering biomass fuel and preparation method thereof

CN122012151ACN 122012151 ACN122012151 ACN 122012151ACN-122012151-A

Abstract

The invention belongs to the technical field of biomass fuels, and in particular relates to an anti-sintering biomass fuel and a preparation method thereof, wherein the anti-sintering biomass fuel comprises the following steps of crushing straws, adding water, and carrying out cooking treatment; drying straw, performing irradiation treatment, soaking the straw in an acidic solution, washing and drying the straw, performing acidolysis treatment on calcite, washing, drying and crushing the calcite to prepare pretreated calcite, mixing the straw and the pretreated calcite to prepare a mixture, and pressing the mixture to form the biomass fuel. According to the invention, the straw is pretreated, the content of inflammable substances such as lignin and the like in the straw is improved, the content of alkaline metal elements is reduced, the alkaline metal elements are compounded with calcite, the calcite after acidolysis has a porous structure, an oxygen pore channel structure can be provided for the straw, the straw is favorable for full combustion, and meanwhile, the components in the calcite can improve the melting point of straw combustion products.

Inventors

  • HUANG JU
  • CHEN YING
  • JIANG YILIN
  • LIU BAIYI
  • CHEN YAN

Assignees

  • 徐州工程学院

Dates

Publication Date
20260512
Application Date
20240325

Claims (10)

  1. 1. The preparation method of the sintering-resistant biomass fuel is characterized by comprising the following steps of: Crushing straw, adding water, and steaming under 1.3-1.5 MPa; drying the steamed straw, and performing irradiation treatment; Soaking the irradiated straw in an acidic solution, washing with water and drying to obtain pretreated straw; After acidolysis treatment of calcite, washing, drying and crushing to prepare pretreated calcite, mixing the pretreated straw with the pretreated calcite to prepare a mixture; And pressing and forming the mixture to obtain the biomass fuel.
  2. 2. The preparation method according to claim 1, wherein the irradiation source of the irradiation treatment is 60 Co, the irradiation dose is 300-500kGy, and the irradiation time is 3-5min.
  3. 3. The process according to claim 1, wherein the acidolysis treatment is carried out using an aqueous hydrochloric acid solution of 0.1 to 0.5mol/L, and the ratio of calcite to aqueous hydrochloric acid solution is 1 g/0.5 to 1mL.
  4. 4. The preparation method according to claim 1, wherein the calcite has a particle size of 6-10mm, and the acid hydrolysis treatment is followed by water washing for 2-4 min.
  5. 5. The method according to claim 1, wherein the mass ratio of the pretreated straw to the pretreated calcite is 1:0.1-0.3.
  6. 6. The method according to claim 1, wherein the acidic solution is a hydrochloric acid solution, a sulfuric acid solution or a nitric acid solution of 0.5 to 1 mol/L.
  7. 7. The method of claim 1, wherein the time of soaking in the acidic solution is 30-50min.
  8. 8. The preparation method according to claim 1, wherein the straw is one or more of wheat straw, corn straw, sugarcane straw and rice straw, and the crushed length of the straw is 1-4mm.
  9. 9. The method according to claim 1, wherein the mass ratio of straw to water in the cooking process is 10:3-4.
  10. 10. The sintering-resistant biomass fuel produced by the production method according to any one of claims 1 to 9.

Description

Anti-sintering biomass fuel and preparation method thereof Technical Field The invention belongs to the technical field of biomass fuels, and particularly relates to an anti-sintering biomass fuel and a preparation method thereof. Background The energy source has important significance for the sustainable development of society, most of the currently used energy sources are non-renewable energy sources, such as petroleum, coal and other energy sources, and the energy sources are continuously consumed, so that the residual quantity of the energy sources is continuously reduced, and accordingly, a plurality of negative effects, such as price rising, resource competition and other problems, are brought about. The continual consumption of such energy has prompted the start of intensive research into renewable energy. Renewable energy sources refer to resources that can be recycled in nature, as compared to fossil energy sources such as petroleum, and biomass fuels are one of the hot spots under investigation. Biomass fuels include agricultural waste, forestry waste, organic waste and the like, and are attracting attention due to the high energy storage of biomass fuels, the low content of toxic and harmful components in the products after combustion and the like. The direct combustion of biomass causes environmental pollution, and biomass fuel refers to the preparation of fuel particles, fuel blocks and the like by crushing, proportioning, mixing, extrusion and other technological processes of biomass raw materials such as agricultural and forestry waste and the like. The prepared fuel particles, fuel blocks and the like can be directly combusted, and compared with the direct combustion of biomass, the biomass can obtain high combustion energy, reduce the pollution to the environment and is a green and renewable energy source. However, the conventional biomass fuel has the problems that the combustion is insufficient, the finally obtained heat is low, the biomass contains more alkaline metals, the sintering problem is easy to cause, and the final heat productivity is affected. Disclosure of Invention In order to solve the technical problems, the invention provides an anti-sintering biomass fuel and a preparation method thereof, and solves the problems of insufficient combustion and sintering of the biomass fuel. The invention is realized by the following technical scheme. The invention provides a preparation method of an anti-sintering biomass fuel, which comprises the following steps: S1, crushing straws, adding water, and steaming at 1.3-1.5 MPa; S2, drying the straws treated in the step S1, and carrying out irradiation treatment; S3, soaking the straw treated in the S2 in an acid solution, washing with water and drying; S4, performing acidolysis treatment on calcite, and then washing, drying and crushing the calcite to prepare pretreated calcite; and S5, pressing and forming the mixture prepared in the step S4 to prepare the biomass fuel. In some embodiments of the invention, in S1, the straw is one or more of wheat straw, corn straw, sugar cane straw, rice straw. In some embodiments of the invention, in S1, the length of straw comminution is 1-4mm. In some embodiments of the invention, in S1, the mass ratio of straw to water is 10:3-4. In some embodiments of the invention, in S2, the irradiation source of the irradiation treatment is 60 Co, the irradiation dose is 300-500kGy, and the irradiation time is 3-5min. In some embodiments of the invention, in S3, the acidic solution is one of a 0.5-1mol/L hydrochloric acid solution, sulfuric acid solution, or nitric acid solution. In some embodiments of the invention, in S3, the time of soaking in the acidic solution is 30-50min. In some embodiments of the invention, in S4, the acidolysis treatment is performed by using 0.1-0.5mol/L hydrochloric acid aqueous solution, and the dosage ratio of calcite to hydrochloric acid aqueous solution is 1g:0.5-1mL. In some embodiments of the invention, in S4, the calcite has a particle size of 6-10mm and is washed with water after an acidolysis treatment for 2-4 min. In some embodiments of the invention, in S4, the mass ratio of the pretreated straw to the pretreated calcite is 1:0.1-0.3. Compared with the prior art, the invention has the following beneficial effects: The method comprises the steps of crushing the straw, steaming the crushed straw at a high temperature, hydrolyzing hemicellulose in a weak acid environment in the steaming process, increasing the content of cellulose and lignin in the straw solid, facilitating the full use of fuel and improving the heat value, carrying out irradiation treatment on the straw, further breaking the tissues such as cellulose and lignin, damaging the internal tissue structure, increasing the pores in the straw, and soaking the straw in an acidic solution to dissolve out sodium and potassium alkali metal elements in the straw, thereby facilitating the improvement of the melting point of