The Optimization of Bamboo Heat Treatment Process
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摘要: 对竹材饱和蒸汽炭化热处理工艺参数进行了优化研究，分析其对竹材加工废水和竹材颜色的影响，试验结果表明，竹材热处理时间和饱和蒸气压对其废水排放量和COD值均呈正相关，即饱和蒸气压越高、处理时间越长，则废水排放量越多、COD值越高；且当饱和蒸汽压超过4.2 MPa·s时（对应热处理温度为250℃左右），竹材加工废水COD值跃增。通过色差L*、b*、ΔE*值与蒸煮饱和蒸气压和炭化时间的线性关系，建立竹材色差与热处理工艺的相关性数学模型，根据现有竹材产品颜色预估热处理工艺。具此分别对浅色系、中深色系、深色系加工竹材进行工艺优化，相比与传统工艺，优化竹材热处理工艺分别降低单位质量废水排放量11.53%、11.32%、12.5%，总有机物排放量分别降低51.91%、43.03%、28.56%，具有较好的实际生产指导意义。Abstract: In this paper,the heat treatment processes of bamboo,including cooking,bleaching and carbonization,were optimized. The results showed that when hydrogen peroxide was used as bleaching agent and pH was 9,the optimal treatment was obtained under the heat treatment at 70 ℃ for 60 min in 6% bleaching solution,the corresponding bamboo whiteness can increase by more than 12%,the bleaching bath solution for bamboo bundles can be reused for 8 to 10 cycles,and its COD could reach 60,000 mg·L-1. A correlation model between the bamboo whiteness (chromaticity) and the saturated vapor pressure and carbonization time was built. The chromaticity was analyzed by colorimeter.Combined with bamboo carbonization process,the chromatogram of bamboo carbonization process was established to guide the practical production. Compared with the traditional experience of saturated vapor pressure carbonization process,determination of carbonization process by means of prediction,the model can reduce a waste water emission by 11.32%-12.5%.
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Key words:
- Bamboo /
- Cooking /
- Bleaching /
- Carbonization
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[1] 张亚梅,余养伦,于文吉,等.热处理对毛竹竹材力学性能影响[J].材料热处理学报,2009,30(3):33-35,41. [2] 茅宏,金鑫,陈利,等.木材加工废水处理工程实例分析[J].能源环境保护,2020,34(2):65-69. [3] 李延军,许斌,张齐生,等.我国竹材加工产业现状与对策分析[J].林业工程学报,2016,1(1):2-7. [4] 贺磊,王玉,王小东,等.竹材加工企业废弃物综合治理技术研究初探[J].江西林业科技,2014,(3):56-58. [5] 刘晓春.木材加工废水的治理方法[J].吉林农业,2014,(9):75-75. [6] 王瑞,于洪侠,祁永会等.胡桃楸加工和利用的木材指标测试与评定[J].农村实用科技信息,2016,(2):34-35. [7] 沈钰程,王云芳,汤颖,等.高温热处理毛竹材诱发变色机理研究[J].竹子研究汇刊,2013,32(4):42-45. [8] 侯玲艳,安珍,赵荣军,等.竹材表面性能研究新进展[J].西南林学院学报,2010,30(4):89-93. [9] 成真,刘迎涛.热处理木材的材色变化研概述[J].安徽农业科学,2015,(15):174-176. [10] 娄志超,杨林添,张爱文,等.饱和蒸汽热处理对竹材颜色的影响[J].林业工程学报,2020,5(4):38-44. [11] 吴再兴,陈玉和,何盛,等.热处理对毛竹竹材表面颜色的影响[J].森林与环境学报,2017,37(1):114-118. [12] 陈宣宗,牛帅红,姜年春,等.高温水热处理对毛竹材颜色和平衡含水率的影响[J].安徽农业大学学报,2019,46(5):815-819. -
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