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<h1 class="h1">怎么样改良康明斯发电机组的排放指标？</span></h1>
<div class="text">发布来源：康柴（深圳）电力技术有限公司　　发布日期: 2024-07-19　　访问量:2326</div>
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<p>康明斯发电机组排放的废气和黑烟对人体和生活环境的危害 柴油发电机的废气排放是造成环境污染的详细来源之一。用户可通过提高柴油的品质、减少润滑油的消耗、改良燃烧过程、排气后排除等步骤来改良康明斯发电机组的排放指标。</p><p>为了控制柴油发电机废气排放圬染，许多国家都制订了相应的环保法规和排放污染物防冶的技术政策，以及控制排放污染物限制的技术监督标准。具有代表性的国际三大排放体系（欧洲、美国、日本）分别制订了分阶段的柴油发电机的排放限值。虽然三个排放规范体系采用了各自的测试方法和阶段限值，但不断严格的趋势是一致的。为满足越来越严的排放法规要求，必须提升燃料质量和采用先进的发电机技术。改良康明斯发电机组排放指标的主要方案有以下几个方面：</p><p>（1）提升柴油的质量。1、增强柴油的着火性能。衡量着火性能的指标是十六烷值。在柴油中加入硝酸烷基醋，它在气缸中能迅速离解，发生活性基，能提升十六烷值，从而改进柴油发电机的着火性能。2、减少含硫量。在炼油工艺中加氢可以有效地降低含硫量。当柴油中硫的品质百分比在0.05%以下时，便会减少排放中微粒含量。3、柴油添加剂。使用柴油添加剂可以改进着火性能，硝酸烷基酯便是添加剂的一种。加入钡、钙、铁化合物，可以减轻炭烟的自燃温度，井有改进柴油发电机滤烟器再生的功用。</p><p>1、气缸套。如汽缸变形、表面粗糙度及加工精密度等。2、活塞环。如气环和油环截面形状、数目；活塞环开口形状；活塞环径向压力分布，加工精度等。3、活塞。如活塞外部形状、变形情况；回油手段；活塞与气缸的配合间隙等。</p><p>(3)改良燃烧过程。随着电控燃油喷射技术、高压共轨、废气再循环、可变压缩技术和多气门的不断采用和创新，将进一步改善柴油发电机的燃烧和工作步骤，大幅减小排放污染。</p><p>1、电控燃油喷射系统。柴油发电机实现电控后，其排放的污染物会大大下降。初期的电喷射技术是位置控制式，通过改变齿条式滑块及柱塞滑套等机构的位置调省油量和定期，再采用电子伺服装置来实施这一调节。该装置响应慢，控制频率较低、精度不确定。新一代电喷系统采用时间控制，用新型电磁阀取代传统的机械装置，对高压燃油实现数字调整。新型的共轨式电控系统不再采用通用的脉动机理，而是采用压力时间计量机理，通过公用油道油压的持续和各缸喷射电磁阀控制相结合的对策实现喷油控制。</p><p>2、废气再循环。柴油发电机废气再循环的控制有气电式和电磁式两种，废气再循环排气量的反馈信号分别通过进气流量和废气再循环阔的升程信号给出。这两种信号均可反映再循环排气量，各有优劣。通过进气流量测算再循环排气量，其响应速度慢，而通过废气再循环阔的升程信号则会因为阀座积炭等问题产生偏差，故目前两种方式并用。</p><p>3、多气门技术。多气门柴油发电机扩大了进气截面，增强了柴油发电机的功率；柴油发电机喷油嘴中心设计，有利于柴油在空间的均匀分布，可实现关闭部分通道，形成和柴油发电机速度相适应的涡流强度。在低速运转时采用上述办法，可使进气涡流比高速运行时增强一倍，从而增强低速度时柴油发电机混合气的质量，改良柴油发电机的经济性、动力性和排放。</p><p>4、涡轮增压中冷技术。装有涡轮增压器柴油发电机的功率输出比未装增压器的增加20%～30%，而采用增压中冷技术甚至可以增加50%。这就意味着可以使柴油发电机的排量小型化，从而减小柴油发电机的整体质量，节约燃料消耗并改进排放状况。</p><p>(4)排气后解决。柴油发电机的排气后解决系统包括减轻微粒排放的微粒捕集器、降低微粒中有机可溶成分SOF（具体成分是高分子的HC）以及气态HC和co的氧化催化转化器、减少NOx的选用性还原催化转化器。</p></div><a href="http://www.gdkmsfdj.com/" target="_blank">http://www.gdkmsfdj.com</a>
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