CN115682803A - 用于冷却裂解气的热交换器 - Google Patents
用于冷却裂解气的热交换器 Download PDFInfo
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Abstract
本发明涉及一种用于冷却裂解气的热交换器,其包括在未冷却管(1)和冷却管(2)之间的管连接。冷却管配置为双管并由冷却内管(3)和套管(4)组成。内管(3)在径向距离处被套管(4)包围,形成管中间空间(5),冷却介质流过该管中间空间。冷却管(2)通过水室(6)和气体入口集管(11)连接非冷却管(1),气体入口集管(11)连接非冷却管并在横截面中分叉。气体入口集管(11)具有GI管内部(12)和GI管外部(13)。形成在GI管内部(12)和GI管外部(13)之间的冷却中间空间(14),该冷却中间空间(14)填充有隔热层(15)。GI管外部(13)通过水室(6)在WC端面(7)上连接套管(4)。GI管内部(12)在水室(6)的WC底端面(8)处以轴向距离面对内管(3)。焊池垫环(16)布置在冷却中间空间(14)的端面(9)和水室(6)的WC底端面(8)之间,并且焊池垫环(16)插入冷却中间空间(14)的隔热层(15)中,并且焊池垫环(16)布置在冷却中间空间(14)端面(9)处的隔热层(15)中的安装的道岔或凹槽(17)中。
Description
技术领域
本发明涉及一种用于冷却裂解气并在非冷却管和冷却管之间具有管连接的热交换器,并且涉及一种用于在非冷却管和冷却管之间连接管连接的工艺。
背景技术
这种用于冷却裂解气并在非冷却管和冷却管之间具有管连接的热交换器,在EP 2278 248 B1中是已知的,其中冷却管配置为双管。双管由冷却内管和套管组成。内管在径向距离处被套管包围,形成管中间空间,冷却介质流过该管中间空间。冷却管通过水室和入口集管连接非冷却管,入口集管连接非冷却管并在横截面中分叉。入口集管具有内管段和外管段。在内管段和外管段之间形成中间空间,并填充有由多层隔热材料构成的隔热层。外管段通过水室连接套管。内管段在入口集管侧的水室的端面上以较短的轴向距离面对冷却内管。在内管的端面和内管段之间设置有环。
从DE 195 31 330 C2中也已知这种用于冷却裂解气并具有管连接的热交换器。裂解气是通过在裂解气炉中的碳氢化合物的热裂解产生的。这种裂解气炉设置许多裂解气管,这些裂解气管在外部被加热,并且使用的碳氢化合物是通过添加水蒸气来携带通过这些裂解气管。产生的裂解气在高达900℃的温度下离开裂解气管,并且必须非常快速地被冷却以稳定其分子组成。裂解气的快速冷却是在裂解气塔中通过将热量从裂解气间接传递给处于高压下的蒸发水来进行的。
在从DE 195 31 330 C2中已知管连接的情况下,未冷却管的端部设置有入口集管,该入口集管配置为在横截面中分叉并具有内管段和外管段。在两个管段之间形成的中间空间填充有隔热材料。外管段与冷却双管的套管焊接在一起。内管段在轴向距离处面向冷却双管的内管,其中配置为环(C、O、U或V形)的密封件位于内管段的端面和内管的端面之间,[环]应防止裂解气渗入隔热材料。
在从EP 810 414B1已知的热交换器的情况下,填充有隔热材料并用于将未冷却管连接冷却管的分叉入口集管也用于冷却裂解气。在现有技术的热交换器的情况下,冷却管由内管组成,该内管在径向距离处被套管包围。用于供给冷却介质的水室包围冷却管的入口端。水室由一个实心的方形件组成,其中插入了横截面为圆形的凹槽或道岔。道岔容纳单个冷却管,其中冷却管的内管焊接道岔的底部并套管与水室焊接在一起。入口集管的外管段在背离套管的一侧焊接到水室上,而入口集管的内管段在轴向距离处面对冷却管的内管。
从EP 2 151 652 B1已知一种具有在裂解炉的裂解管和裂解气塔的冷却管之间的连接件的热交换器。冷却管在此配置为具有形成冷却中间空间的布置在裂解管的延伸部中的内管和包围内管的外管的双管。冷却中间空间连接用于供给冷却介质的供给室或水室。此外,裂解管与传输件或入口集管连接,其端部配置为在横截面中分叉,并且具有内部和外部,在它们之间插入由隔热材料构成的层。水室与入口集管配置成一个单元。描述了一种用于将裂接管连接冷却管的工艺。
由于内管和内管段之间的轴向空隙,具有布置入口集管的现有技术的热交换器能够以不受限制的方式进行与热相关的长度膨胀。插入的隔热体导致永久连接冷却管的入口集管的外管段呈现壁温,该壁温低于流过未冷却管的气体的温度。壁温到达在连接点处以这种方式相互对齐的管,从而使连接点处的热应力最小化。
热交换器中气体入口集管的一个基本目的是在裂解气炉和裂解气塔或热交换器之间建立连接。该目的的一个困难是由于两种不同的材料在高温下结合在一起的事实,并且尤其是裂解气炉的镍基材料和裂解气塔或热交换器的水室的细晶粒结构钢或C型钢,特别是没有不同的热膨胀系数导致连接失败或泄漏。
迄今为止,该技术已经开发了一种用于热交换器的气体入口集管的特殊配置,该配置允许或确保分别具有不同材料的气体入口集管和水室的焊接连接的兼容温差。在这种情况下,所谓的C型环或密封环在这种焊接连接的情况下很重要,其在设备运行期间应防止乙烯渗透在气体入口集管的中间空间,中间空间填充有隔热材料。
在气体入口集管与水室的焊接连接的情况下,如果可以保持定义的焊接收缩,则可防止乙烯渗透。这种定义的焊接收缩是通过将气体入口集管连接并焊接到水室上而确保的,该焊接没有气隙并具有约3mm厚的焊唇。然后始终保持定义的焊接收缩,然而,在这种焊缝连接的焊接之后,形成在气体入口集管处并且未焊接的约3mm厚的焊唇的剩余区域仍然存在。它是未焊透的焊缝。
发明内容
本发明的基本目的是配置在非冷却管和冷却管之间具有管连接的这种类型的热交换器,使得气体入口集管与水室的焊缝连接完全焊透,而没有焊缝连接的未焊透的剩余区域残留。此外,一个目的是创建一种工艺,该工艺通过热交换器中的完全焊透的焊缝确保气体入口集管与水室的焊缝连接。
该基本目的根据本发明在这种类型热交换器的情况下通过专利权利要求1的特征实现,该热交换器包括在非冷却管和冷却管之间的管连接。本发明的有利实施例是从属权利要求的主题。
已证明特别有利的是,将配置为焊池垫环的环布置在气体入口集管的冷却中间空间的端面和水室的WC底端面之间。另一个优点可以看出,焊池垫环布置在冷却中间空间端面上的由隔热材料构成的隔热层中的安装的道岔或凹槽中,并且与GI管外部的管内表面接触。优选地规定隔热层和焊池垫环在气体入口集管的焊接边缘上方有0.3mm至1.3mm的小悬垂0.5mm的悬垂是优选的。
此外,主要优点是焊池垫环在冷却中间空间端面处牢固地嵌入或通过压力嵌入隔热材料构成的隔热层中,并且被压在GI管外部的管内表面上。
另一个优点在于焊池垫环在与GI管外部的管内表面相对的端面上设有凹形凹槽。此外,在冷却中间空间的端面上的GI管外部的排放端处的环形端件和水室的WC底端面有利地具有彼此相对定位的成形的腹板宽度为0.5mm至1.5mm的GI焊唇/WC焊唇。
焊池垫环优选地在朝向GI管外部的管内表面的端面上设有半径为0.5mm的凹形凹槽。优点之一是在冷却中间空间的端面上的GI管外部的排放端处的端件和水室的WC底端面具有彼此相对定位的成形的腹板宽度为1.0mm的GI焊唇/WC焊唇。
一个特别的优点是焊池垫环与具有彼此相对定位的成形的焊唇的GI管外部和WC底端面与水室焊接在一起,该焊接具有完全连接且没有剩余间隙的完全焊透的焊缝。
另一个优点在于,焊池垫环由陶瓷或金属材料制成并且配置为密封环和隔热环。
工艺的基本目的根据本发明通过专利权利要求7的特征在热交换器中实现,该热交换器在未冷却管和冷却管之间具有管连接。本发明的有利实施例是从属权利要求的主题。
在用于连接在未冷却管和冷却管之间的管连接的过程中被认为特别有利的是将具有焊池垫环的气体入口集管夹入常规装置中,该焊池垫环嵌入冷却中间空间中的插入的隔热层中并与GI管外部的管内表面接触。制备焊缝连接的一个优点是气体入口集管附接至水室,在GI焊唇上没有气隙,该GI焊唇由冷却中间空间端面上的GI管外部形成的环形端件处的进气集管形成,并且附接至WC焊接唇,该WC焊接唇形成在与GI焊接唇相对的水室的WC底端面上。另一个优点通过以下事实显示:焊缝的第一焊接层是用MAG焊枪和具有用于根部保护的焊接填充材料的MAG焊丝进行的。有利地,在第一焊接层的顶面上形成的焊渣被完全机械去除。此外,可以看出优点在于,剩余的焊缝采用常用焊接材料在第一焊接层上焊接或填充2n个焊接层或焊道的道次,其中n=1-12,优选地n=3-8。
有利地,气体入口集管使用常规装置(未示出)附接至水室,并且气体入口集管位于焊接位置并由凸出的隔热材料构成的隔热层和无剩余气隙的凸出的焊池垫环压在水室上,并在提供的焊缝的3到4个点处点焊。
有利地,制备好的管连接被送入常规的自动焊接机(未示出),并在气体入口集管的进气口内侧用三爪或四爪卡盘夹紧,并将第一焊枪引导到所提供的焊缝的焊接节点。
一个重要的优点是第一焊接层通过带有活性气体的金属焊接工艺和具有强熔渣形成的焊接填充材料进行或制备,正在形成的渣在正在形成的焊池和焊池垫环之间形成,并且正在形成的熔体被正在形成的渣保护以抵抗大气氧。
有利地,在第一焊接层或根层焊接之后,在第一焊接层的顶侧上沉积的焊渣被完全机械去除,并且剩余的焊缝用自动焊接机的第二个焊枪和常用焊接材料焊接和填充2n个焊接层或焊道的道次,其中n=1-12,优选地n=3-8。
剩余的焊缝优选地用由实心线构成的焊接材料封闭并填充2n个焊接层或焊道的道次。
附图说明
下面根据附图在示例性实施例中示出和解释本发明的其他优点和细节。在附图中,
图1以缩小比例示出了根据本发明的通过具有管连接的热交换器底部的纵向截面,以及
图2以放大比例示出了焊接前的图1的细节Z。
附图标记如下:
1 非冷却管
2 冷却管
3 冷却内管
4 套管
5 管中间空间
6 水室
7 WC端面
8 WC底端面
9 端面
10 管内表面
11 气体入口集管
12 GI管内部
13 GI管外部
14 冷却中间空间
15 隔热材料构成的隔热层
16 焊池垫环
17 道岔或凹槽
18 GI焊唇
19 WC焊唇
20 GI内侧
21 凹形凹槽
22 GI管外部端件
具体实施方式
图1示出了通过热交换器(未示出)底部的纵向截面,该热交换器在未冷却管1和冷却管2之间具有管连接。冷却管2配置为双管并由冷却内管3和套管4组成。内管3在径向距离处被套管4包围,形成管中间空间5,冷却介质流过该管中间空间。
冷却管2通过水室6(简称WC)和气体入口集管11(简称GI)连接非冷却管1,气体入口集管11连接非冷却管并在横截面中被分叉。气体入口集管与其在非冷却管1上的进气口内侧20齐平对齐并具有GI管内部12和GI管外部13。在GI管内部12和GI管外部13之间形成有冷却中间空间14,在该冷却中间空间14中插入有由隔热材料构成的隔热层15。
气体入口集管11的GI管外部13通过水室6在WC端面7处连接冷却管2的套管4。气体入口集管11的GI管内部12在水室6的WC底端面8处以约0.3mm至1.3mm的轴向距离面对冷却内管3。
如图2所示,与GI管外部13的管内表面10接触的焊池垫环16布置在冷却中间空间14的端面9处的插入的由隔热材料构成的隔热层15上。
焊池垫环16布置在冷却中间空间14的端面9处的由隔热材料构成的隔热层15中的安装的道岔或凹槽17中并与GI管外部13的管内表面10接触。隔热材料构成的隔热层15和焊池垫环16在冷却中间空间14的端面9处的气体入口集管11的焊接边缘上方具有0.3mm至1.3mm的短悬垂0.5mm的悬垂是优选的。
焊池垫环16在冷却中间空间14的端面9处牢固地嵌入在由隔热材料构成的隔热层15中并压在GI管外部13的管内表面10上。
焊池垫环16在冷却中间空间14的端面9处设有凹形凹槽21,其与管外部13的管内表面10接触。在气体入口集管11的冷却中间空间14的端面9上,呈腹板形式的环形GI焊唇18设置在GI管外部13的排放端件22处。在水室6的WC底端面8上同样形成有环形WC焊唇19。相应的GI/WC焊唇18、19彼此相对布置并各自形成有0.5mm至1.5mm的腹板宽度。1.0mm的腹板宽度是优选的。
此外,焊池垫环16和具有相应安装的环形GI/WC焊唇18、19的气体入口集管11的GI管外部13和水室的WC底端面8连接水室6,该连接为无剩余间隙且焊缝完全焊透的完全连接,通过MAG焊枪在第一焊接层或根层使用带渣的焊接填充材料焊接,并完全去除第一焊接层上的焊渣,并用2n个焊接层或焊道使用没有焊接填料的常用焊接材料的焊枪填充剩余的焊缝,其中n=1-12,优选地n=3-8。
由陶瓷或金属材料构成的焊池垫环16被构造为密封环和隔热环。
在用于连接热交换器(未示出)的未冷却管1和冷却管2之间的管连接的过程中,气体入口集管11附接至常规装置(未示出),在第一步骤中,在GI管内部12和GI管外部13之间形成冷却中间空间14,在该冷却中间空间14中插入由隔热材料构成的隔热层15。
在第二步骤中,将焊池垫环16在冷却中间空间14的端面9处嵌入由隔热材料构成的隔热层15中安装的道岔或凹槽17中,其中,隔热材料构成的隔热层15和焊池垫环16在气体入口集管11的焊接边缘上方具有约0.3mm至1.3mm的小悬垂优选地提供0.5mm的悬垂
在第三步骤中,气体入口集管11通过常规装置(未示出)无气隙地附接至水室6。气体入口集管11的GI管外部13的排放端件22处安装的GI焊唇18与形成在相对的水室6的水室底端侧8上的WC焊唇19对齐并放置在焊接层,并在焊接层的圆形焊缝的环形区域的3到4个点处点焊。安装有约0.5mm小悬垂的隔热层15和设置有0.5mm小悬垂的焊池垫环16通过装置(未示出)无剩余气隙地压到水室6上。
在现有技术的钨极惰性气体(Wolfram Inert Gas)焊接工艺的情况下阻碍了气体入口集管11与水室的这种附接,因为没有形成的气体可以被引导到根部区域以对根部焊缝进行必要的根部保护。
将气体入口集管11附接至水室6后并在焊接层的环形区域的3到4个点处点焊后,部件被送入常规自动焊接机(未示出),并用三爪/四爪卡盘夹在气体入口集管的进气口内侧20上。
自动焊接机(未示出)通过扫描熔化极活性气体(Metal Active Gas)焊枪(未示出)或MAG焊枪引导至焊缝的制备好的焊接节点。焊缝由腹板宽度为1.0mm的GI焊唇18和腹板宽度同样为1.0mm的对应件WC焊唇19制备,其GI焊唇18形成在气体入口集管11的管外部13的排放端件22上,其WC焊唇19形成在水室的WC底端面8上,并且GI焊唇18和WC焊唇19彼此对齐。
第一焊接层是用MAG焊枪和具有用于形成强熔渣或作为带渣的焊接填充材料的MAG焊丝进行或制备,其中,正在形成的焊渣形成在正在形成的焊池和焊池垫环16之间。作为正在形成的焊渣的结果,保护正在形成的熔体以抵抗大气氧,从而防止与大气氧的反应。第一焊接层仅使用具有焊接填充材料的MAG焊丝焊接。
在另一步骤中,在第一焊接层的焊接之后,将形成在第一焊接层的顶侧上的焊渣完全机械去除。
焊枪再次由带有常用焊接材料的焊接机器人定位在焊接层中,并且在第一焊接层上方的剩余焊缝用常用的焊接材料焊接并填充具有2n个焊接层或焊道的道次,焊接材料优选地为实心线,其中n=1-12,优选地n=3-8。
通过该工艺实现并确保气体入口集管11在非冷却管1与冷却管2的管连接的关键点处完全焊接到热交换器的水室6,没有焊缝的剩余区域,该剩余区域是剩余的未完全焊透的区域。
该工艺进一步保证了在气体入口集管的GI管外部与水室的焊接连接中可以保持一直定义的焊接收缩。这种定义的焊接收缩通过如下确保:与GI焊唇对齐的气体入口集管,该GI焊唇安装在WC焊唇处的GI管外部的排放端件上,该WC焊唇布置在相对的WC底端面且分别具有0.5mm至1.5mm的腹板宽度,优选地1.0mm,并无气隙附接且焊接到水室上。
Claims (15)
1.用于冷却裂解气的热交换器,其包括在未冷却管(1)和冷却管(2)之间的管连接,其中,冷却管配置为双管并由冷却内管(3)和套管(4)组成,内管(3)在径向距离处被套管(4)包围,形成管中间空间(5),冷却介质流过该管中间空间,其中冷却管(2)通过水室(6)和气体入口集管(11)连接非冷却管(1),气体入口集管(11)连接非冷却管并在横截面中分叉,其中气体入口集管(11)具有GI管内部(12)和GI管外部(13),以及形成在GI管内部(12)和GI管外部(13)之间的冷却中间空间(14),该冷却中间空间(14)填充有隔热材料构成的隔热层(15),其中GI管外部(13)通过水室(6)在WC端面(7)上连接套管(4),其中GI管内部(12)在水室(6)的WC底端面(8)上以短的轴向距离面对内管(3),其特征在于,配置为焊池垫环(16)的环布置在冷却中间空间(14)的端面(9)和水室(6)的WC底端面(8)之间,焊池垫环(16)插入冷却中间空间(14)的隔热层(15)中,焊池垫环(16)布置在冷却中间空间(14)端面(9)上的隔热层(15)中的安装的道岔或凹槽(17)中并且与GI管外部(13)的管内表面(10)接触,并且隔热层(15)和焊池垫环(16)在气体入口集管(11)的焊接边缘上方有0.3mm至1.3mm的短悬垂
2.根据权利要求1所述的热交换器,其特征在于,焊池垫环(16)在冷却中间空间(14)端面(9)处被牢固地嵌入或通过压力嵌入隔热层(15)中并且被压在GI管外部(13)的管内表面(10)上。
3.根据权利要求1所述的热交换器,其特征在于,焊池垫环(16)在端面(9)处相对于管内表面(10)设有凹形凹槽(21),在冷却中间空间(14)的端面(9)上的GI管外部(13)的排放端处的环形端件(22)和水室(6)的WC底端面(8)具有彼此相对定位的成形的腹板宽度为0.5mm至1.5mm的GI焊唇/WC焊唇(18、19)。
4.根据权利要求3所述的热交换器,其特征在于,在端面(9)处朝向管内表面(10)形成的焊池垫环(16)具有半径为0.5mm的凹形凹槽(21),并且在冷却中间空间(14)的端面(9)上的GI管外部(13)和水室(6)的WC底端面(8)具有彼此相对定位的成形的腹板宽度为1.0mm的GI焊唇/WC焊唇(18、19)。
5.根据权利要求3所述的热交换器,其特征在于,焊池垫环(16)与具有彼此相对定位的成形的GI焊唇/WC焊唇(18、19)的GI管外部(13)和WC底端面(8)与水室(6)焊接在一起,该焊接具有完全连接且没有剩余间隙的完全焊透的焊缝。
6.根据权利要求1所述的热交换器,其特征在于,焊池垫环(16)由陶瓷或金属材料制成并且配置为密封环和隔热环。
7.用于连接冷却裂解气的热交换器的非冷却管(1)和冷却管(2)的工艺,冷却裂解气的热交换器具有根据权利要求1的在未冷却管和冷却管之间的管连接,其特征在于,气体入口集管(11)具有焊池垫环(16),该焊池垫环(16)嵌入冷却中间空间(14)中的插入的隔热层(15)中并与GI管外部(13)的管内表面(10)接触,气体入口集管(11)被夹入装置中用于制备从气体入口集管(11)连接到水室(6)的焊缝,水室(6)处的气体入口集管(11)无气隙地附接至GI焊唇(18),该GI焊唇(18)由在冷却中间空间(14)的端面(9)上GI管外部(13)处的环形端件(22)处的气体入口集管(11)形成,并气体入口集管(11)附接至WC焊唇(19),该WC焊唇(19)形成在与GI焊唇相对的水室(6)的WC底端面(8)处,使用MAG焊枪和具有用于根部保护的焊接填充材料的MAG焊丝进行或制备第一焊接层,将形成于第一焊接层顶侧的焊渣完全机械去除,并且剩余的焊缝采用常用焊接材料在第一焊接层上焊接或填充2n个焊接层或焊道的道次。
10.根据权利要求9所述的工艺,其特征在于,气体入口集管(11)使用常规装置附接至水室(6),气体入口集管(11)被定位在焊接位置,气体入口集管(11)由凸出的隔热层(15)和凸出的焊池垫环(16)无剩余气隙地压在水室(6)上并在提供的焊缝的3到4个点处点焊。
11.根据权利要求10所述的工艺,其特征在于,制备好的管连接被送入常规的自动焊接机,并在气体入口集管(11)的进气口内侧(20)用三爪或四爪卡盘夹紧,并将自动焊接机的第一焊枪引导到焊缝的焊接节点。
12.根据权利要求11所述的工艺,其特征在于,第一焊接层通过带有活性气体的金属焊接工艺和具有强熔渣形成的焊接填充材料进行或制备,其中正在形成的焊渣在正在形成的焊池和焊池垫环(16)之间形成,并且正在形成的熔体被正在形成的焊渣保护以抵抗大气氧。
13.根据权利要求12所述的工艺,其特征在于,在第一焊接层焊接之后,在焊接层的顶侧上沉积的焊渣被完全机械去除,剩余的焊缝用自动焊接机的第二个焊枪和常用焊接材料焊接和填充2n个焊接层或焊道的道次。
14.根据权利要求13所述的工艺,其特征在于,剩余的焊缝用实心线封闭并填充2n个焊接层或焊道的道次,其中n=1-12。
15.根据权利要求14所述的工艺,其特征在于,剩余的焊缝用实心线封闭并填充2n个焊接层或焊道的道次,其中n=3-8。
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US (1) | US20230025071A1 (zh) |
EP (1) | EP4122594B1 (zh) |
JP (1) | JP2023016796A (zh) |
KR (1) | KR20230015841A (zh) |
CN (1) | CN115682803A (zh) |
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DE4445687A1 (de) * | 1994-12-21 | 1996-06-27 | Borsig Babcock Ag | Wärmetauscher zum Kühlen von Spaltgas |
DE19531330C2 (de) | 1995-08-25 | 2003-06-18 | Borsig Gmbh | Verbindung eines ungekühlten Rohres mit einem gekühlten Rohr |
US5813453A (en) | 1996-06-01 | 1998-09-29 | Deutsche Babcock-Borsig Ag | Heat exchanger for cooling cracked gas |
US5690168A (en) * | 1996-11-04 | 1997-11-25 | The M. W. Kellogg Company | Quench exchanger |
DE19707915A1 (de) * | 1997-02-27 | 1998-09-03 | Borsig Babcock Ag | Verbindung eines heißen, ungekühlten Rohres mit einem gekühlten Rohr |
US8701748B2 (en) * | 2006-02-17 | 2014-04-22 | Exxonmobil Chemical Patents Inc. | Outlet fitting for double pipe quench exchanger |
DE102008014978A1 (de) | 2008-03-19 | 2009-09-24 | Linde Aktiengesellschaft | Schweißbadsicherung |
DE102008036955A1 (de) | 2008-08-08 | 2010-02-11 | Borsig Gmbh | Verbindungsstück zwischen einem Spaltrohr und einem Kühlrohr sowie ein Verfahren zum Verbinden eines Spaltrohres mit einem Kühlrohr |
DE102009025624A1 (de) | 2009-06-17 | 2010-12-23 | Borsig Gmbh | Wärmetauscher zum Kühlen von Spaltgas |
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EP4122594B1 (de) | 2024-03-06 |
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