Search

CN-122010087-A - Bagasse biochar preparation method and application

CN122010087ACN 122010087 ACN122010087 ACN 122010087ACN-122010087-A

Abstract

The invention discloses a bagasse biochar preparation method and application, and belongs to the technical field of biochar preparation, wherein the preparation method is to dry bagasse in a sugar mill until the water content is not more than 28%; preheating continuous carbonization equipment for 1.4-1.6 hours, controlling the temperature in a main cabin to 470-500 ℃, feeding dried bagasse into the continuous carbonization equipment for carbonization, controlling the frequency of a feeding motor to 17.0-1.72HZ, the frequency of a main machine of the equipment to 17.3-17.5 HZ and the frequency of a fan to 19.3-19.5 HZ. The application is in reducing the effective state content of heavy metals Pb and Cd and the content of organic dye in soil and in improving the content of mineral combined state organic matters and condensed ring aromatic carbon in soil. The preparation method optimizes processing parameters, realizes low oil consumption, high carbon conversion rate and high yield of bagasse charcoal, and has the advantages of higher average pore diameter and mesoporous average pore diameter, high aromaticity and excellent quality although the specific surface area of the bagasse charcoal is lower. The bagasse biochar can be used for soil improvement.

Inventors

  • ZENG PEIYI
  • CHEN YONG
  • HE SHUJUAN
  • YANG MUQING
  • ZHU XIAN
  • MA ZITAO

Assignees

  • 云南省生态环境科学研究院

Dates

Publication Date
20260512
Application Date
20260128

Claims (10)

  1. 1. The bagasse biochar preparation method is characterized by comprising the following steps of: s1, drying bagasse in a sugar refinery until the water content is not more than 28%; S2, preheating continuous carbonization equipment for 1.4-1.6 hours, and controlling the temperature in a main cabin to be 470-500 ℃; And S3, conveying the dried bagasse into continuous carbonization equipment for carbonization, wherein the frequency of a feeding motor is controlled to be 17.0 HZ-1.72 HZ, the frequency of a main machine of the equipment is controlled to be 17.3 HZ-17.5 HZ, and the frequency of a fan is controlled to be 19.3 HZ-19.5 HZ.
  2. 2. The method for preparing bagasse charcoal according to claim 1, wherein the water content in the step S1 is 20% -25%.
  3. 3. The method for preparing bagasse charcoal according to claim 1, wherein the preheating in step S2 is jacket preheating.
  4. 4. The method for preparing bagasse charcoal according to claim 1, wherein the carbonized tail gas generated in the step S3 is sent to a gas storage tank after dust removal and purification for the step S2 combustion preheating.
  5. 5. The method for preparing bagasse charcoal according to claim 1, wherein the charcoal after carbonization in step S3 is sent out by cooling and conveying.
  6. 6. The method for preparing bagasse biochar according to claim 1, wherein the feeding end of the continuous carbonization device is a feeding conveyor.
  7. 7. A bagasse biochar produced by the bagasse biochar production method according to any one of claims 1 to 6.
  8. 8. Use of the bagasse biochar according to claim 7 for reducing the effective state content of soil heavy metals Pb, cd and the content of organic dyes.
  9. 9. Use of the bagasse biochar according to claim 7 for increasing the content of mineral bound organic matter and fused ring aromatic carbon in soil.
  10. 10. The use according to claim 8 or 9, characterized in that the bagasse biochar is crushed and sieved by a sieve with 80-100 meshes, and the biochar is applied to soil with the use amount of 50kg/667m 2 ~300kg/667m 2 .

Description

Bagasse biochar preparation method and application Technical Field The invention belongs to the technical field of biochar preparation, and particularly relates to a bagasse biochar preparation method and application. Background Sugarcane is used as an important cash crop, bagasse as a processing byproduct is usually used as an organic fertilizer or feed, but in actual operation, part of bagasse still cannot be effectively utilized due to inconvenient transportation, high treatment cost and the like, is burnt on site or is stacked at will, and still forms pressure on the environment. Although bagasse is intensively produced in sugar factories, the bagasse has the characteristics of high sugar content and easy adhesion and coking, and is convenient to collect as a biochar raw material, so that the bagasse is difficult to stably convert in a traditional horizontal continuous carbonization device. The Chinese patent No. 109650370A discloses a method for preparing bagasse charcoal by normal pressure hydrothermal method, which uses high boiling point cosolvent to pyrolyze bagasse in the environment surrounded by liquid water to prepare bagasse charcoal with regular particles, but the method needs high boiling point cosolvent, and has complex process and difficult mass production. The Chinese patent No. 117361527A discloses a preparation method of nitrogen-doped porous bagasse biochar, which is characterized in that bagasse is cleaned in the pretreatment process, so that bagasse sugar is removed, and then the subsequent treatment is carried out. At present, no study on stable production in a traditional horizontal continuous carbonization device is reported directly by taking bagasse as a raw material without pretreatment. Therefore, it is necessary to develop a bagasse biochar preparation method and application suitable for horizontal continuous carbonization stable production. Disclosure of Invention The invention aims to solve the technical problems that sugar content is high, adhesion and coking are easy, and stable conversion in a horizontal continuous carbonization device are difficult, and the first aim of the invention is to provide a bagasse biochar preparation method, and key technological parameters are optimized for bagasse raw material characteristics, so that an adaptive carbonization solution is formed. In order to further promote bagasse recycling and alleviate the incineration pollution of agricultural and forestry wastes, a bagasse biochar preparation method suitable for high-saccharide biomass and application thereof are developed, and the bagasse biochar has important practical significance and application value. The second object of the invention is to provide an application of bagasse biochar. The first object of the present invention is achieved by comprising the steps of: s1, drying bagasse in a sugar refinery until the water content is not more than 28%; S2, preheating continuous carbonization equipment for 1.4-1.6 hours, and controlling the temperature in a main cabin to be 470-500 ℃; And S3, conveying the dried bagasse into continuous carbonization equipment for carbonization, wherein the frequency of a feeding motor is controlled to be 17.0 HZ-1.72 HZ, the frequency of a main machine of the equipment is controlled to be 17.3 HZ-17.5 HZ, and the frequency of a fan is controlled to be 19.3 HZ-19.5 HZ. The continuous carbonization device is a processing device for continuously producing biochar, which is well known to the person skilled in the art and comprises a feeding system (provided with a feeding motor for driving the feeding mechanism), a carbonization host (comprising a host driving motor with adjustable speed, the frequency of which corresponds to the frequency of the host of the device), a temperature control system (provided with a temperature sensor for monitoring the temperature in a host cabin), and an exhaust and atmosphere regulating system (provided with a fan for regulating carbonization atmosphere and exhausting volatile matters), and specifically, the continuous carbonization device related to the utility model patent of the utility model of the inventor (a system for continuously carbonizing bagasse to produce biochar and recycling byproducts) (patent number ZL 2023201984676) can also be used. The temperature in the main cabin refers to the average temperature in the reaction cavity of the carbonization main machine, the frequency of the feeding motor refers to the operating frequency of the feeding motor of the feeding system, the frequency of the equipment main machine refers to the operating frequency of the main machine driving motor for driving the carbonization main machine to rotate or push, and the frequency of the fan refers to the operating frequency of the fan of the exhaust and atmosphere regulating system. Preferably, the water content in the step S1 is 20% -25%. Preferably, the step S2 preheating is jacket preheating. Preferably, the carbonized tail gas