化工进展 ›› 2023, Vol. 42 ›› Issue (9): 5019-5027.DOI: 10.16085/j.issn.1000-6613.2022-1981

• 资源与环境化工 • 上一篇    

近临界水处理废弃烟梗工艺优化

王浩然1(), 殷全玉1, 方明2, 侯建林2, 李军2, 何斌2, 张明月1()   

  1. 1.河南农业大学烟草学院,河南 郑州 450002
    2.湖南省烟草公司郴州市公司,湖南 郴州 423000
  • 收稿日期:2022-10-24 修回日期:2022-11-09 出版日期:2023-09-15 发布日期:2023-09-28
  • 通讯作者: 张明月
  • 作者简介:王浩然(1998—),男,硕士研究生,研究方向为近临界水处理烟草废弃物。E-mail:lyswhr@yeah.net
  • 基金资助:
    河南省科技研发计划联合基金(222103810005);河南省高等学校重点科研项目(23A210022);湖南省烟草公司郴州市公司科技项目(2021431000240173)

Optimization of near critical-water treatment process of tobacco stems

WANG Haoran1(), YIN Quanyu1, FANG Ming2, HOU Jianlin2, LI Jun2, HE Bin2, ZHANG Mingyue1()   

  1. 1.Tobacco College, Henan Agricultural University, Zhengzhou 450002, Henan, China
    2.Chenzhou Branch of Hunan Provincial Tobacco Company, Chenzhou 423000, Hunan, China
  • Received:2022-10-24 Revised:2022-11-09 Online:2023-09-15 Published:2023-09-28
  • Contact: ZHANG Mingyue

摘要:

为了探究近临界水(NCW)处理烟梗获得植物营养液和生物炭的最优处理工艺,采用正交试验设计,对NCW处理烟梗工艺进行优化,设计了料液比、反应温度和反应时间的三因素三水平正交试验。结果表明: ①NCW液化烟梗的最优处理组合为料液比1∶14,温度180℃,时间15min,烟梗生物炭产率最高和气化率最低的条件均为料液比1∶4,温度180℃,时间15min;②NCW液化烟梗制备植物营养液中有机质、总氮磷钾和中微量元素含量的最优处理条件均料液比1∶4,温度180℃,时间15min;③结合工艺优化目标与植物营养液质量进行综合评价,T9为最优处理,在此处理下,烟梗液化率51.8%,生物炭产率31.8%,综合利用率达83.6%。获得的植物营养液有机质含量(63.1±1.2)g/L,氮磷钾(N+P2O5+K2O)总含量(5.748±0.017)g/L,中微量元素含量(101.0±3.2)mg/L,达到相关企业标准,可以作为植物营养液使用。

关键词: 近临界水, 烟梗, 正交试验, 植物营养液, 生物炭

Abstract:

To explore the optimal treatment process of plant nutrient solution and biochar obtained from tobacco stem treated with near-critical water (NCW), an orthogonal test design was used to investigate the effects of different factors (solid-liquid ratio, temperature, and reaction time) on the liquefaction rate, biochar yield, gasification rate and nutrient content in the liquid phase. The article analyzed the optimum process conditions of tobacco stems with near-critical water by using the combined analysis of extreme difference, variance analysis and affiliation function. The results showed that: ①The optimal treatment combination of NCW liquefaction tobacco stem was the material-liquid ratio 1∶14, 180℃ and 15min. The conditions with the highest biochar yield and the lowest gasification rate were the liquid ratio 1∶4, 180℃ and 15min. ②The optimal treatment conditions for the content of organic matter, total nitrogen, phosphorus, kalium, medium and trace elements in the liquid were 1∶4, 180℃ and 15min, respectively. ③Combined with the process optimization target and the quality of plant nutrient solution, T9 was the optimal treatment. Under this treatment, the liquefaction rate of tobacco stem was 51.8%, the biochar yield was 31.8%, and the comprehensive utilization rate was 83.6%. The organic matter content of the plant nutrient solution was (63.1±1.2)g/L, the total content of nitrogen, phosphorus and potassium (N + P2O5 + K2O) was (5.748±0.017)g/L, and the content of medium trace element was (101.0±3.2)mg/L, which met the relevant enterprise standards and could be used as plant nutrient solution.

Key words: near-critical water, tobacco stem, orthogonal test, plant nutrient solutions, biochar

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