Basic study on recovery energy and gasification with effective utilization of waste coal and biomasses

近年来，随着中国经济的快速发展，能源需求不断增加。针对这一趋势，中国提出增加煤炭、天然气产量和石油进口。随着大量化石燃料消耗的增加，二氧化碳（一种温室气体）的高排放是一个关键问题。此外，在采煤和洗煤过程中被丢弃的废煤，由于其灰分高、硫含量高、热值低，由于可利用性少、占用土地面积大、自燃污染大气、水污染等原因被丢弃，需要适当的废煤处理和有效利用技术。因此，中国重视废煤的高效利用和作为新能源的能源回收。本研究的目的和目标是废煤的有效利用。将废煤生物质型煤作为固体燃料，对其燃烧试验和气化技术进行了基础研究。结果表明，废煤生物质型煤抗压强度超过国内运输标准，热值超过国内民用，燃烧质量好，硫氧化物减少。此外，由于废煤-生物质成型燃料的成本低于常规煤-生物质成型燃料，因此废煤-生物质成型燃料作为固体燃料的推广是可能的。在对废煤生物质型煤气化技术的基础研究中，提出了气化反应性递进、硫化氢固定、产气燃料热值较原废煤气化提高的观点。我们认为这些影响来自于生物质的添加，生物质的添加可能导致碳含量的增加和表面积的增加，生物质中含有K、Na和Ca等催化金属，氢氧化钙作为固硫剂。另外，在制备废煤生物质型煤时，适当提高成型压力可提高气化反应性。这些基础研究暗示了废煤生物质型煤气化转化为清洁气体燃料的可能性。这些研究结果表明，废煤生物质型煤作为固体燃料或气体燃料的能源资源应用的可能性，并可能导致废煤的回收能源和有效利用技术。少

Recently, energy demanded has increased with significantly development of economy in China. Respond to this tendency, China has proposed increment of coal and natural gas production and oil import. The high emission of CO_2 (carbon dioxide, a greenhouse gas) with increasing consumption of a large amount of fossil fuels is critical issue. Moreover, waste coal which is discarded coal when coal extraction and cleaning, because of having high-ash content, high-sulfur content and low-calorific value is discarded since the scarce availability, occupancy of vast area of land and air pollution by autogenous ignition and water pollution, an appropriate treatment and effective utilizing technology of waste coal is required. Therefore, China has paid the attention to efficient use of waste coal and energy recovery as a new energy. The purposes and objectives of this study are the efficient use of waste coal. We made waste coal-biomass briquette as solid fuel and conducted basic research on the co … More mbustion test and gasification technology. As the result, it was suggested that waste coal-biomass briquette had compression strength exceeding standard of internal transport in China, calorific value exceeding civilian use in China, good burning quality and reduction of sulfur oxide. In addition, it was implied that dissemination of waste coal-biomass briquette as a solid fuel was possible because the lower cost of waste coal-biomass briquette than the routine coal-biomass briquette. And as basic research about gasification technology of waste coal-biomass briquette, it was suggested that reactivity of gasification was progressive, hydrogen sulfide was fixed, and calorific value of gas fuel produced was increased in comparison with gasification of its original waste coal. We thought that these effects came from addition of biomass which may cause the increment of carbon content and high surface area and catalytic metals such as K, Na and Ca contained in biomass and calcium hydroxide which is as a sulfur-fixation agent. In addition, it was found that the reactivity of gasification was improved by the suitable increasing briquetting pressure when waste coal-biomass briquette was prepared. These basic researches implied that possibility of converting waste coal-biomass briquette to clean gas fuel by gasification. These study results indicate the possibility of the application of waste coal-biomass briquette as an energy resource of the solid fuel or the gas fuel, and may lead to the recovery energy and effective utilization technology of waste coal. Less