共查询到19条相似文献,搜索用时 484 毫秒
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本实用新型提供一种空气助燃、氧气助燃混合燃烧系统,其设在玻璃熔窑内,其特征在于,所述空气助燃、氧气助燃混合燃烧系统包括:使得助燃空气与燃料混合、燃烧以熔化玻璃的第一燃烧器,以及使得来自氮站的副产品氧气和燃料混合、燃烧以熔化玻璃的第二燃烧器。本实用新型的空气助燃、 相似文献
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通过1.3MW级工业燃烧器实验验证商用CFD软件计算天然气湍流扩散火焰长度的有效性。以天然气(含有95%CH4和5%N2)为燃料,以直径为300mm、长度为1200mm的圆筒形燃烧室中、燃气孔径基本尺寸2mm的同轴射流扩散火焰为研究对象。采用数值计算的方法研究了燃气流量、喷孔孔径、助燃风特性等多种因素对火焰长度的影响规律。研究结果表明:在天然气湍流扩散火焰中,当孔径不变燃气流量增加一倍,火焰长度由652mm增加到782mm,增长19.9%。当燃气流量不变孔径增加一倍,652mm增加到1012mm,增长55.2%。改变燃气孔径是控制湍流扩散火焰长度的有效手段;在一定氧含量范围内,与助燃风氧含量相比,湍流火焰长度对助燃风速度的变化更加敏感。该研究对评估天然气燃烧装备性能和优化燃烧室设计具有重要的应用价值。 相似文献
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研究设计内混式高效空气雾化轻柴油燃烧器。针对石油、石化、化工行业中锅炉在开工阶段没有燃料气和蒸汽供应,燃烧器的燃气枪和雾化蒸汽油枪无法投用,因此,锅炉装置不能运行。探讨在原燃烧器的基础上,按尽量不改变原燃烧器结构、燃烧方式和尽量少投入的原则,将原蒸汽雾化燃油枪改用空气雾化方式,开工用燃料油采用0#柴油,其它都不作改动。针对冷态试验结果,讨论了气压和油压对火炬形状的影响,油枪燃烧能量和雾化剂耗量,燃烧火盆与雾化角的关系。使用表明油枪喷嘴喷孔夹角、喷孔数、孔径、燃烧火盆、助燃风设计合理,雾化粒度细,燃烧完全,火焰刚直明亮、集中,喷嘴不结焦,操作性能良好。 相似文献
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《林产化工通讯》2012,(3):56-57
1、发明专利名称:一种生物质炉具燃烧器及其燃烧方法申请号:200910303537.4申请日:2009.06.23申请公布号:CN 101644429 A申请公布日:2010.02.10发明人:杜文庆摘要:本发明涉及一种生物质炉具燃烧器及其燃烧方法,生物质炉具燃烧器包括生物质炉和空气助燃器,生物质炉设有加料门和烟气出口,空气助燃器的两端与生物质炉的内侧相连接,空气助燃器的两侧面与生物质炉内壁相离,空气助燃器主要由支架和补气管组成,补气管的两端与支架相连接,补气管至少有2根且补气管之间留有间隙,补气管上设有若干补气口,支架上至少设有一个进风口,支架内设有与补气管管口相连接的气道。本发明安装在x-,lk/~I生物质半气炉上方,可使煤或生物质固体燃料直接燃烧产生大量的可燃性气体及粒状黑碳经过该空气助燃器时达到充分彻底燃烧,可消除黑烟,提高燃料的热能转换率,具有节约燃料成本,保护环境等特点。 相似文献
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This paper presents an experimental investigation of the turbulent reacting flow in a swirl combustor with staged air injection. The air injected into the combustor is composed of the primary swirling jet and the secondary non-swirling jet. A three dimension-laser particle dynamic analyzer (PDA) was employed to measure the instantaneous gas velocity. The probability density functions (PDF) for the instantaneous gas axial and tangential velocities at each measuring location, as well as the radial profiles of the root mean square of fluctuating gas axial and tangential velocities and the second-order moment for the fluctuating gas axial and tangential velocities are obtained. The measured results delineate the turbulence properties of the swirling reacting flow under the conditions of staged combustion. 相似文献
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An inverted cyclone gasifier and secondary cyclone combustor have been developed for use in a biomass fired small-scale cogeneration plant. The gasifier was designed with a vortex collector pocket (VCP) and a central collector pocket (CCP) to maximise particle and ash separation from the flow, and remove alkali and other heavy metal traces that agglomerate with the ash particles. The gasifier design was robust and suitable for firing with varying input conditions. The gasifier exhaust gas is suitable for directly firing into the secondary cyclone combustor without any complex hot gas clean up systems. The cyclone combustor produces a strong swirling flow with good mixing and burnout patterns, creating stable combustion conditions. The use of an additional VCP situated before the combustor exit removes the need for additional cyclone separators. An exhaust mounted tangential off-take on the combustor reduces pressure drop across the system and gives near uniform exhaust velocity profiles. The gasifier achieved 98–99% burnout with good separation/retention rates and 50% alkali, Na and K removal. A good quality low calorific value (LCV) gas was produced that could be effectively utilised in the cyclone combustor. The cyclone combustor produces a stable flow, with good mixing and burnout rates, and uniform exit conditions and could be operated in a lean mode to minimize NOx. The additional use of a VCP removed particles above 5 μm, as specified by turbine inlet conditions. The gas was suitable for directly firing into the gas turbine. Low pressure drop was found across the system. 相似文献
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根据RDF(Refuse Derived Fuel)先部分燃烧部分热解然后再气相燃烧的设想,设计了下部为喷流-移动床热解室、上部为气相燃烧室的两段反应器,对实验室中制备的RDF在该反应器中进行部分燃烧部分热解然后气相燃烧的性质进行了研究. RDF颗粒连续加入到热解室中,实现了在少量空气作用下部分燃烧并在较低温度下部分热解,热解气体与二次空气在上部燃烧室中高温燃烧.主要考察了喷动气量,水平辅助气量和二次气量对反应器温度分布以及气体产物分布的影响. 相似文献
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This paper describes a series of experiments conducted with natural gas in air and in mixtures of oxygen and recycled flue gas, termed O2/CO2 recycle combustion. The objective is to enrich the flue gas with CO2 to facilitate its capture and sequestration. Detailed measurements of gas composition, flame temperature and heat flux profiles were taken inside CANMET's 0.3 MWth down-fired vertical combustor fitted with a proprietary pilot scale burner. Flue gas composition was continuously monitored. The effects of burner operation, including swirling of secondary stream and air staging, on flame characteristics and NOx emissions were also studied. The results of this work indicate that oxy-gas combustion techniques based on O2/CO2 combustion with flue gas recycle offer excellent potential for retrofit to conventional boilers for CO2 emission abatement. Other benefits of the technology include considerable reduction and even elimination of NOx emissions, improved plant efficiency due to lower gas volume and better operational flexibility. 相似文献
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在浮法玻璃生产过程中,玻璃窑炉产生的高温烟气余热回收发电,退火窑热风与玻璃熔窑小炉蓄热室顶部热风回收到助燃风系统,提高助燃风温度,降低燃料消耗,改善玻璃熔化质量,达到节能减排、优质稳产目的。 相似文献