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CN-122012152-A - Biomass derived fuel based on other garbage and preparation method thereof

CN122012152ACN 122012152 ACN122012152 ACN 122012152ACN-122012152-A

Abstract

The application discloses a biomass derived fuel based on other garbage and a preparation method thereof, comprising the following steps: the method is characterized in that other garbage after household garbage classification is used as a raw material, a base material meeting the preparation requirements of biomass fuel is obtained through a multi-stage separation and multi-stage crushing process, auxiliary materials such as straw, waste wood dust, calcium hydroxide, calcium oxide, sodium silicate and the like are added in a scientific proportion, the heat value of the fuel is obviously improved, ash content is reduced, and the generation and emission of pollutants such as SO 2 , HCl and dioxin are effectively inhibited. The whole set of process involves mature equipment, is easy to realize large-scale production, has obvious environmental protection and economic benefit, and is particularly suitable for popularization and application in areas without garbage incineration facilities.

Inventors

  • CHEN ZHAOMING

Assignees

  • 新疆联禾环境科技有限公司

Dates

Publication Date
20260512
Application Date
20260226

Claims (10)

  1. 1. The preparation method of the biomass-derived fuel based on other garbage is characterized by comprising the following steps of: Gradient screening is carried out on the collected other garbage, materials with the particle size larger than the first aperture and materials with the particle size smaller than the second aperture are separated, and materials with the particle size between the first aperture and the second aperture are collected, wherein the first aperture is larger than the second aperture; Shearing and crushing the collected materials to obtain primary crushed materials; Magnetic separation is carried out on the primary shredded material to remove metal impurities, and then flexible matters and rigid matters are separated through air separation and bouncing screening; respectively carrying out fine crushing on the flexible object and the rigid object to obtain a biomass base material with the granularity of 3-5 mm; and mixing the biomass base material with auxiliary materials to obtain the biomass-derived fuel.
  2. 2. The method of claim 1, wherein the first pore size is 65-90mm, the second pore size is 25-50mm, and the difference between the first pore size and the second pore size is 30-50mm.
  3. 3. The method of claim 1, wherein the shear crushing is performed using a low speed, high torque shear crusher.
  4. 4. The method according to claim 1, wherein the air velocity is 7.5-14 m/s, the wind direction is at an angle of 10 ° -20 ° to the horizontal during the air separation; the bouncing screening is carried out through a bouncing screen, the amplitude of the bouncing screen is 3-5mm, the vibration frequency is 12-18Hz, and the inclination angle of the screen plate is 5-15 degrees.
  5. 5. The method of claim 1, wherein the flexible material and the rigid material are finely crushed into 3-5mm materials respectively and independently, the crushed flexible material and the crushed rigid material are combined to obtain biomass base material with the granularity of 3-5mm, Crushing the flexible object by a rotor crusher; the rigid objects are crushed by a reversible hammer crusher.
  6. 6. The method of claim 1, wherein the adjunct comprises biomass fuel, calcium hydroxide, calcium oxide, and silicate, wherein, The biomass fuel is one or more of leaves, flowers, stems, roots and shells of plants; the silicate is one or more of sodium silicate, potassium silicate, calcium silicate, magnesium silicate, ferric silicate and aluminum silicate.
  7. 7. The method of claim 6, wherein the biomass-derived fuel comprises the following components in parts by weight: 60-85 parts of biomass base material, 15-35 Parts of biomass fuel, 1-4 Parts of calcium hydroxide, 1-4 Parts of calcium oxide, Silicate 0.5-3 parts.
  8. 8. The method of claim 1, further comprising drying the biomass-derived fuel to a water content of 10% -15%; placing the dried biomass-derived fuel into a particle forming machine, and performing extrusion forming at the temperature of 140-160 ℃ and the pressure of 30-80MPa to prepare the biomass-derived particle fuel; The biomass-derived fuel is dried to a water content of 10-15%, wherein the drying is performed at 80-120 ℃, the ventilation rate is 0.8-1.2 m/s, and the drying time is 20-30 minutes.
  9. 9. The method of claim 8, wherein the biomass-derived particulate fuel produced has a density of 1.1-1.35g/cm3, a particle size of 6-10mm and a length of 10-30mm.
  10. 10. A further refuse-based biomass-derived fuel, characterized in that it is produced by the method according to any one of claims 1-9, comprising: biomass base stock and auxiliary material, the auxiliary material includes biomass fuel, calcium hydroxide, calcium oxide and silicate.

Description

Biomass derived fuel based on other garbage and preparation method thereof Technical Field The invention relates to the field of environmental protection technology and solid waste recycling, in particular to a biomass-derived fuel prepared from other garbage after household garbage classification and a preparation method of the biomass-derived fuel. Background Household garbage is divided into wet garbage (kitchen garbage), harmful garbage, recyclable garbage and other garbage, and with the comprehensive implementation of a garbage classification system in China, the classification coverage range of each stage of urban garbage is continuously enlarged, and the separation ratio of other garbage in the urban household garbage is remarkably improved. At present, the recycling of other garbage mainly depends on the processes of incineration, pyrolysis and the like to be converted into electric energy or heat energy (such as CN 103712217B), so that the energy recovery of the garbage is realized. However, there are significant limitations to the prior art. Firstly, the traditional incineration technology is difficult to effectively separate impurities such as metal, glass, chlorine-containing materials and the like in a pretreatment stage, SO that the combustion quality is reduced, and harmful gases such as sulfur dioxide (SO 2), hydrogen chloride (HCl) and the like are easily discharged. Although patents such as CN101949546B have proposed a treatment method of dioxin and pollutants for incineration tail gas, the main focus is on terminal treatment after incineration, and chlorine-containing materials cannot be blocked from entering the high-temperature incineration environment from the source. The method not only increases the load, cost and complexity of the tail gas purification system, but also ensures that the control of highly toxic substances such as dioxin and the like is completely dependent on complex and high-cost terminal procedures, and the operation risk and the control difficulty are higher. Secondly, the solutions of the prior art for preparing fuel for waste, still suffer from drawbacks in the handling of other waste that has been classified. For example, CN119799384a discloses a method for preparing biomass briquette fuel from municipal solid waste, which is to sort by a drum screen and air separation, and add combustion-supporting components such as potassium nitrate, magnesium carbonate and the like. The scheme can improve combustion performance, but has limited removal effect on harmful components, and can not inhibit the generation of acid gas and dioxin. In sum, the problems of high ash content, unstable heat value, difficult control of combustion pollutants and the like of the fuel products prepared by the method are caused by the insufficient separation efficiency at the source or the dependence on complex terminal treatment in the prior art, so that the economical efficiency and the environmental protection of other garbage recycling are limited. Therefore, development of a novel treatment technology capable of specifically controlling pollutant generation is needed to realize efficient and clean recycling of other garbage. Disclosure of Invention The invention aims to provide biomass derived fuel based on other garbage and a preparation method thereof, and aims to effectively remove impurities through a multistage separation and crushing process, and prepare biomass derived fuel with high heat value, low ash content and standard emission of harmful gases such as SO 2, HCl and dioxin during combustion by combining with the addition of specific auxiliary materials, SO as to realize the efficient and clean recycling of other garbage. In order to achieve the above purpose, the present invention adopts the following technical scheme: The first aspect of the invention provides a method for preparing biomass-derived fuel based on other garbage, which comprises the following steps: Gradient screening is carried out on the collected other garbage, materials with the particle size larger than the first aperture and materials with the particle size smaller than the second aperture are separated, and materials with the particle size between the first aperture and the second aperture are collected, wherein the first aperture is larger than the second aperture; Shearing and crushing the collected materials to obtain primary crushed materials; Magnetic separation is carried out on the primary shredded material to remove metal impurities, and then flexible matters and rigid matters are separated through air separation and bouncing screening; respectively carrying out fine crushing on the flexible object and the rigid object to obtain a biomass base material with the granularity of 3-5 mm; and mixing the biomass base material with auxiliary materials to obtain the biomass-derived fuel. The second aspect of the invention provides a biomass-derived fuel based on other garbage, which comprises a biomass b