CN102639675A - 运行炼焦炉***的方法 - Google Patents
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Abstract
本发明涉及一种运行炼焦炉***的方法,其中在炼焦过程中伴生的焦炉煤气被作为有用气体供给材料回收***。根据本发明,供给合成气体作为燃气,以用于提供炼焦过程所需要的热能的至少一部分,所述合成气体由矿物燃料/优选煤借助于煤气化过程制取。
Description
技术领域
本发明涉及一种运行炼焦炉***的方法,其中在炼焦过程中伴生的焦炉煤气被作为有用气体供给材料回收***。
背景技术
在实践中在炼焦过程中伴生的焦炉煤气通常被燃烧并且因此仅仅在能量方面被利用,尽管焦炉煤气含有大量的有价值成分(氢气和甲烷)。反对这样的应用的主要保留原因是焦炉煤气不再能够用作加热用气体并且缺少的加热能量必须通过其它方式提供。
由DE 34 244 24 A1已知一种方法,其中在炼焦过程中伴生的焦炉煤气被作为有用气体供给材料回收***。同时氢气被分离并且调节到合适的H2-CO比例,以便接下来通过甲烷化制成合成的天然气。因为焦炉煤气在输送给材料回收***时不再能产生炼焦过程所需要的热能,所以建议使用高炉煤气或甲烷作为替代气体用于焦炉组的生烧。当在炼焦的紧邻处存在钢厂或煤矿并且应用这种替代气体证明是非常经济的时,才考虑应用高炉煤气或甲烷。因为这些要求在实践中几乎很难满足,所以如上所述通常焦炉煤气仅仅用于加热目的。
由DE 35 15 250 A1和DE 38 05 397 A1已知其它的利用焦炉煤气的方法。在这些方法中分别规定,将具有高的氢气含量的焦炉煤气与具有高的一氧化碳含量的高炉煤气混合。这些已知的方法的前提是,以足够的量提供必需首先被耗费地清洁的高炉煤气。
发明内容
本发明的任务是使得在炼焦炉***运行时可以灵活和有效地利用伴生的焦炉煤气。
本发明的内容和上述任务的解决方案是一种具有开头所述特征的运行炼焦炉***的方法,其特征在于,供给合成气体作为燃气以用于提供炼焦过程所需要的热能的至少一部分,该合成气体由矿物燃料借助于煤气化过程(即制取煤气过程)制取。通过使用矿物燃料来制取合成气体,得到了用于运行炼焦炉***的方法的特别高的灵活性。尽管提供矿物燃料和实施煤气化过程以制取合成气体与附加的投资和工艺费用相关联,然而通过获得在焦炉煤气中包含的有用材料成分而总体上在经济上具有优点。这特别是这种情况,即使用煤作为矿物燃料,其与其它的用于实施煤气化工艺合适的矿物燃料、例如天然气相比是有利的并且本来就已经被提供用于实施炼焦过程。根据本发明的方法因此可以独立于其它的生产场所如煤矿或高炉地应用。当然而在紧邻处存在高炉设备时,也存在这样的可能性,即将所产生的合成气体的另外一部分输送给高炉用于热利用。
根据本发明建议,在炼焦过程中在焦炉煤气中伴生的气体成分如氢气和/或甲烷被分离出来并且作为最终产品使用或者转化成更高价值的产品,其中而后对于炼焦过程和可能也对于高炉过程而言缺乏的能量通过借助于煤气化从矿物燃料制取的合成气体替代。所制取的粗合成气体在被作为燃气供给以用于提供一部分对于炼焦过程所需的热能并且特别是用于焦炉组的生烧(Unterfeuerung)之前,通常仅必须被脱硫。在合成气体用作燃气的情况下不再需要麻烦地处理合成气体,该处理此外包含移除二氧化碳。
在本发明的范围内可以规定,将由矿物燃料制取的合成气体仅仅作为燃气以提供热能。根据本发明的一个优选的设计,然而制取与用于替代根据本发明被材料回收的焦炉煤气所需要的量相比更多的合成气体。从而可以规定,将制备的合成气体的第一部分用作燃气并且将制备的另外一部分合成气体用于进一步的转化和材料回收。
类似于由现有技术已知的传统的炼焦过程,在本发明的方法的范围内在炼焦过程中伴生的焦炉煤气首先以已知的方式被去除杂物例如焦油、萘、芳香烃(BTX成分)、硫和氨气。根据本发明的一个优选的设计,被如此清洁的焦炉煤气被压缩以分离氢气和/或碳氢化合物。为了分离氢气可以例如在一个PSA(pressure swing adsorption)设备中执行变压吸附(PSA),其中氢气在PSA设备的压力侧以高纯度的形式获得。变压吸附可以在通常的PSA设备中或也在真空PSA设备(VPSA)中实施。
在PSA设备的卸压侧获得富含甲烷的气体,其在其它的准备步骤中与剩余的气体成分、特别是一氧化碳、二氧化钛、氮气、乙炔和残余的氢气分离。氮气、一氧化碳以及所述残余的氢气的分离可以例如通过低温蒸馏实现,其中二氧化碳和水蒸气之前利用合适的方法例如借助于氨净化和/或分子筛干燥被分离。作为有用气体获得的碳氢化合物成分可以输送给天然气网和/或被保留用于进一步的合成。
如业已描述,由焦炉煤气获得的气体成分可以作为最终产品使用或者转化成更高价值的产品,其中也可以使用在矿物燃料煤气化时制取的合成气体的一部分用于进一步合成和转化。接下来阐述有利的应用可能性。
被分离的氢气通常可以在相邻的化学设备(例如提炼设备)中用作氢化用氢气。根据一个优选的设计规定,将产生的氢气和通过矿物燃料煤气化制取的合成气体的一部分进行进一步转化,其中氢气与合成气体的一氧化碳的一部分转化成高价值的产品。从而例如可能的是:合成甲醇,以及进一步通过MTG(甲醇至汽油)方法制造燃料,根据费托方法合成柴油,或合成氨气。
当利用所获得的氢气和由矿物燃料获得的合成气体(其基本上包含一氧化碳)以用于进一步合成时,得到这样的优点,即特定的氢气/一氧化碳比例能够通过相应的入流控制在一个宽的范围内自由选择。
特别是为了就整个方法而言仍然进一步提高氢气产量,可以规定,将所产生的合成气体的一部分进行一氧化碳转变。为此目的可以在添加水蒸气的情况下实现一氧化碳转变,其中在转化的合成气体脱硫之后至少部分移除二氧化碳,其中接下来将剩余的气流经受变压吸附以分离氢气并且同时伴生的被脱去氢气的废气被用作用于炼焦过程的燃气。通常被热利用的废气为提供热能所需要的总体燃气的一部分。
由矿物燃料获得的合成气体可以进一步用于利用组合的燃气和蒸汽发电厂(GUD-process)发电。
根据本发明,对于炼焦过程所需要的热能由作为燃气的合成气体提供,其借助于矿物燃料(优选是煤)的煤气化过程获得。为了提供热能的另外部分,也可以使用在各个不同的后续方法阶段伴生的剩余气体和废气用于燃烧。特别是优选设置的PSA设备的废气通常包含大份额的可燃成分,其能够通过燃烧被热利用。此外也可以将具有较高的热值的高价值的燃料、例如天然气混入。这样的混合可能是需要的,以便调节到期望的沃泊指数或者补偿仍未通过其它的燃气满足的能量需求。
Claims (10)
1.一种运行炼焦炉***的方法,其中在炼焦过程中伴生的焦炉煤气被作为有用气体供给材料回收***,其特征在于,供给合成气体作为燃气以用于提供炼焦过程所需要的热能的至少一部分,所述合成气体由矿物燃料借助于煤气化过程制取。
2.如权利要求1所述的方法,其特征在于,使用煤作为矿物燃料。
3.如权利要求1或2所述的方法,其特征在于,在由焦炉煤气中去除氢气和接下来从剩余气体成分中分离碳氢化合物之前,将焦炉煤气压缩和脱硫。
4.如上述权利要求1至3之一项所述的方法,其特征在于,通过变压吸附从焦炉煤气中分离出氢气,其中接下来借助于低温蒸馏分离出碳氢化合物。
5.如上述权利要求1至4之一项所述的方法,其特征在于,将所制取的合成气体的第一部分用作燃气,并且将所制取的合成气体的另外一部分用于进一步与从焦炉煤气中分离出来的氢气进行合成。
6.如上述权利要求1至5之一项所述的方法,其特征在于,将所制取的合成气体的第一部分用作燃气,并且将所制取的合成气体的另外一部分进行一氧化碳转化。
7.如权利要求6所述的方法,其特征在于,在添加水蒸气的情况下实施所述一氧化碳转化,其中在被转化的合成气体的脱硫之后至少部分去除二氧化碳,接下来对剩下的气体流实施变压吸附以去除氢气并且将同时伴生的被脱去氢气的废气用作用于炼焦过程的燃气。
8.如上述权利要求1至7之一项所述的方法,其特征在于,将所制取的合成气体的第一部分用作燃气并且将所制取的合成气体的另外一部分在燃气和蒸汽发电厂中用于发电。
9.如上述权利要求1至8之一项所述的方法,其特征在于,为了提供炼焦过程所需要的热能,除了合成气体之外,还输入其它的加热用气体。
10.如上述权利要求1至9之一项所述的方法,其特征在于,将所制取的合成气体的另外一部分输送给高炉以进行热利用。
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DE102009042520.9 | 2009-09-22 | ||
DE102009042520A DE102009042520A1 (de) | 2009-09-22 | 2009-09-22 | Verfahren zum Betrieb einer Koksofenanordnung |
PCT/EP2010/062024 WO2011035993A1 (de) | 2009-09-22 | 2010-08-18 | Verfahren zum betrieb einer koksofenanordnung |
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- 2010-08-18 RU RU2012116149/05A patent/RU2533149C2/ru not_active IP Right Cessation
- 2010-08-18 KR KR1020127010109A patent/KR20120074294A/ko not_active Application Discontinuation
- 2010-08-18 EP EP10742854A patent/EP2480631A1/de not_active Withdrawn
- 2010-08-18 JP JP2012530196A patent/JP2013505342A/ja active Pending
- 2010-08-18 CA CA2774898A patent/CA2774898A1/en not_active Abandoned
- 2010-08-18 WO PCT/EP2010/062024 patent/WO2011035993A1/de active Application Filing
- 2010-08-18 CN CN2010800505839A patent/CN102639675A/zh active Pending
- 2010-08-18 US US13/497,361 patent/US20120217148A1/en not_active Abandoned
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2012
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Also Published As
Publication number | Publication date |
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RU2012116149A (ru) | 2013-10-27 |
TW201118161A (en) | 2011-06-01 |
JP2013505342A (ja) | 2013-02-14 |
KR20120074294A (ko) | 2012-07-05 |
CA2774898A1 (en) | 2011-03-31 |
RU2533149C2 (ru) | 2014-11-20 |
AU2010297521A1 (en) | 2012-05-03 |
EP2480631A1 (de) | 2012-08-01 |
IN2012DN03166A (zh) | 2015-09-18 |
DE102009042520A1 (de) | 2011-03-24 |
US20120217148A1 (en) | 2012-08-30 |
WO2011035993A1 (de) | 2011-03-31 |
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