燃煤锅炉 外文翻译 外文文献 英文文献 中英翻译

大连交通大学 2009 届本科生毕业设计外文翻译 1 he in of to in of to be or as as on of in to of a of a of In be of iO of on to of in in at an of in at to of of of of of of as as in on is in On of in a of in in to of to is of to a be by of (i) of to in in a (to at it is 大连交通大学 2009 届本科生毕业设计外文翻译 2 (to is a is be in a As be be to by up of If is in a of it to is to it to of a of in a 1) a in of of a is is to it is if we to to is be at is it of be to of to to of 20%). to of of is a of of At at of a of be or by in on of or as as on of or It be as a to is in an to is to a be in as a it in a in to a is at a or it in in 大连交通大学 2009 届本科生毕业设计外文翻译 3 It is to as w2 2 a w1 1 be in ks is a on of an of in a in a of as a . A is in a at is to w2 at of of of it in of of 2 a 1. is a 0),is a 1 is a 1in of a in a We we in a is to it is to 2 1, we h of is to 0 of s of as of of be 6 ：a, (2)a is r0 is At a = of s is 0 r0 at at of is .3 in is in f a b be to f/0. is to in In a= f/0. In is to in d in 7. to in 大连交通大学 2009 届本科生毕业设计外文翻译 4 a of in if is on or A is a a 70 t/h of in a it to or to or of in 1. A on in of at we to at in of of in a be in If we of nb in a Fb=of as in a in hb in in as a Ox O b 1) of a of 1, a as a of b = By we in an in of in b. At we in a be if we to a to be on of be in be to it is we of on in a = of in of in a on 大连交通大学 2009 届本科生毕业设计外文翻译 5 of of to of a to to 1, be 1 (3) in a if we of by a , of of 0 by a (3) be in of on of in a 1 ,is of or on in in of be to at 5) It be of = 1)an in an to be by 0 8. of a in to a a of is a in a of As a of go at w2/ 23) to be a as a to by be of of of by of 9, 10. in in a in a of to of in of 1, a 大连交通大学 2009 届本科生毕业设计外文翻译 6 of of A a 30 t/h in of an . of at a 530 m/s a of at a A of of of of a to be in a to a A in of 0 650 t/h an of iO at a We to so as of is a of is of a of in a of 13. in be to as to of in of be in An of a is 2. As of on is of a IR of be as in in to of of an of In to of be to a in a It be of in a is in to of as to of is 9. a 大连交通大学 2009 届本科生毕业设计外文翻译 7 of of is to be if we a a an on 大连交通大学 2009 届本科生毕业设计外文翻译 8 燃煤锅炉的燃烧进程控制 存在于火电厂的市场的燃料供应，某些操作参数需要改变（或保留）的情况下 ，以及经济和环境方面 倾向的 要求使他们变得更加严格的不稳定趋势是导致使控制燃烧与传热过程炉设备非常紧迫的主要因素。解决这个问题的办法有两个方面。第一阶段包括发展燃烧技术和当新装置设计时高炉的设计。第二阶段包括现有的现代化设备。在两种情况下，技术精髓的采用必须通过类似试验与计算研究的使用来证实。有着丰富经验的机组研究和生产协会（ 和齐奥专家取得锅炉操作和实验进行了调查，他们的模式使他们能够提出一些新设计的混和机动性，换言之，可 控炉装置已在发电站投入使用多年，与此同时，一种近似零一维，锅炉炉膛燃烧进程总线计算模型在 经研制成功，这一模型允许 家获取计算这一进程中的主要参数，计算研究炉膛采用不同技术时的发射与燃烧方式。当然，火炉燃烧进程的调整方法有诸如改变空气过剩系数，烟气再循环率，燃料和空气在锅炉空间内的分配，以及其它在锅炉运行期间书面的控制图表。然而，它们对进程的影响自然是有限的。另一方面，控制锅炉的燃烧进程很可能意味着在某种条件下发成实质性改变，在这种条件下发生燃烧和传热，目的是大幅度扩大负荷量，尽量减 少热损失，减少炉渣的污染程度，减少排放的有害物质，并且转型成再燃物。这种控制，可利用以下三个主要因素 : (i)流动的氧化剂和气体以一种期望的空气动力学方式在火焰中流动 (燃料供应到火炉的方法并证实燃料已经供应到地方了 (过研磨的优良燃料 后者意味着火炉床的方法被用作带有火焰的燃料燃烧过程。流化床燃烧的方法可以实施三个设计版本：带有密集床的机械炉，流化床锅炉，以及喷动床炉。 正如一下所要展示的，第一个因素可以通过在锅炉装置周围建立一些庞大的漩涡转移大量的空气和燃烧产品来实现。如果燃料进给是在 火焰中进行，最佳的进给方式是将其进给到漩涡中心区域附近，这种方式特别适用在高度密集炉设备中。在这一区域的燃烧过程具有较低的空气过剩因数 1 ，在这一很长过程时间内这些成分都要存在于此，这一因素有助于使燃烧过程更稳定和减少排放的氮氧化物 。 同样重要的是，对于锅炉燃烧控制过程，当固体燃料燃烧时，也要优化将燃料碾磨精化。如果我们要尽量减少不完全燃烧 ，燃料的研磨程度应该与位置相协调，在这一位置上，燃料被送进炉膛，同时供应燃料应讲究方法，因为碳的不完全燃烧不但是因为大型燃料组分不完全燃烧，而且还因为某些经过研磨的细质不燃烧的缘故。（特别是某些挥发性的成分 0%）。 由于存在绘画般的显示流体运动的可能性，锅炉空气动力学吸引了大量研究人员和 大连交通大学 2009 届本科生毕业设计外文翻译 9 设计师的关注，他们一直致力于发展和改进锅炉设备。与此同时，锅炉空气动力学的关键在于混合中心（集中的传递），这一过程的可估计的定量参数，只能间接或特殊的测量。成分在炉膛内混合的质量严格上取决于数量，布局，还有从个别 炉膛和喷嘴喷射出来的流体动力，以及它们与流动的废气或与墙壁的相互作用。 有人建议，气体喷射距离可以作为参数确定气体燃烧器通道中燃料与空气的混合程度。这种如何估计有效混合