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Waste Disposal & Sustainable Energy
Waste Disposal & Sustainable Energy  2021, Vol. 3 Issue (1): 49-61    DOI: 10.1007/s42768-020-00062-9
    
利用纤维素乙醇蒸馏所得半固体副产物进行供热和发电研究
Valorization of semi-solid by-product from distillation of cellulosic ethanol into blends for heating and power
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摘要： 纤维素乙醇蒸馏产生的半固体副产物常作为燃料为其上游生产环节提供能源。然而，该原料具有尺寸和外形均一、吸水性和低热值等特点，使其在工厂中的再利用非常复杂，因此，将此类农业残渣转化为可供热和发电的高性能混合物是本研究的科学重点。利用自动造粒机进行复合颗粒的中试制造，其中工作条件为200 MPa和 125 °C，残渣和甘蔗渣的质量比为1:4、2:4和3:4，压实过程持续时间为90 s。混合颗粒的耐久性和能量密度均显着提高，以混合质量比3:4为例，耐久性从95.85%提高到99.55%，能量密度从27.95 GJ m-3提高到32.20 GJ m-3。在实际应用中，半固体副产物可有效改善进料，使得颗粒料层能够顺利通过造粒机的槽型成形模具。结果表明，混合颗粒的硬度和密度均比甘蔗渣制成的颗粒更高。初步证明，纤维素乙醇蒸馏产生的半固体副产物可通过造粒制成机械性能稳定的高品位混合生物燃料。针对易产生粉尘和废气及自燃风险高的室内设施，本文的主要研究成果对确保生物质在此类设施中安全有效的运输和存储具有重要意义。此外，造粒可以优化大型生物乙醇站的热电联供。
Abstract: Burning down on semi-solid by-product from distillation of cellulosic ethanol to power upstream steps of its manufacturing is usual. However, this feedstock is homogenous in size and shape, hygroscopic and poorly energetic. These disadvantages make its re-use in the industrial plant very complex. Conversion of this agro-residue into high-performance blends for heating and power is, accordingly, the scientific point of this study. The pilot-scale manufacturing of composite pellets consisted of systematically pressing the residue with sugarcane bagasse at the mass ratios of 1:4, 2:4, and 3:4 on an automatic pelletizer machine at 200?MPa and 125?°C. The process of compaction lasted for 90?s. Durability and energy density, both increased significantly, from 95.85% to 99.55% and from 27.95 GJm?3? to 32.20?GJ m?3 with blending at 3:4. Practically, the semi-solid by-product considerably improved the feeding, thus, enabling the layers of particles to go smoothly through the channel-forming die of the machine. Thereby, blends became stiffer and denser than pellets purely consisting of sugarcane bagasse. Preliminary evidence of the process of pelleting capable of highly valorizing the semi-solid by-product from distillation of cellulosic bioethanol into mechanically stable and energetically effective hybrid fuel grade biosolids exist. The major findings of this paper should be of great relevance to ensure safe and effective transportation and storage of biomass in indoor facilities where the risk for the?generation of dust and fines and the subsequent off-gassing and self-firing is high. Furthermore, pelletization may optimize the co-generation of heat and steam at the large-scale bioethanol station.
出版日期: 2021-06-27
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Bruno Rafael de Almeida Moreira
Victor Hugo Cruz
Matheus Luís Oliveira Cunha
Nathaly Proen?a Lopes
Anderson Chagas Magalh?es
Celso Tadao Miasaki
José Claudio Caraschi & Ronaldo da Silva Viana

引用本文:

Bruno Rafael de Almeida Moreira, Victor Hugo Cruz, Matheus Luís Oliveira Cunha, Nathaly Proença Lopes, Anderson Chagas Magalhães, Celso Tadao Miasaki, José Claudio Caraschi & Ronaldo da Silva Viana. Valorization of semi-solid by-product from distillation of cellulosic ethanol into blends for heating and power. Waste Disposal & Sustainable Energy, 2021, 3(1): 49-61.

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https://www.zjujournals.com/wdse/CN/10.1007/s42768-020-00062-9    或    https://www.zjujournals.com/wdse/CN/Y2021/V3/I1/49

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