CN109210364A - 用于低温介质的储存箱 - Google Patents
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- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
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- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
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- F17C2223/033—Small pressure, e.g. for liquefied gas
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- F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
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- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
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- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
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- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
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- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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- F17C2227/0369—Localisation of heat exchange in or on a vessel
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Abstract
本发明涉及一种用于低温介质(2)、尤其用于液态天然气的储存箱(1),包括限界箱内室(3)的箱壁(4),至少一个第一管路(5)和第二管路(6)穿过所述箱壁被引到所述箱内室(3)中,其中,所述第一管路(5)用于提取呈液态形式的介质(2)并且限定提取部位(7),所述提取部位布置在所述箱内室(3)的底部区域(8)中。根据本发明,所述第二管路(6)用于引回所述介质(2)的气态泄漏量并且限定至少一个吹入部位(9),所述吹入部位相对于所述提取部位(7)隔开距离(a)地同样布置在所述底部区域(8)中。
Description
技术领域
本发明涉及一种用于低温介质的储存箱。所述低温介质尤其可以是液态天然气(LNG),该液态天然气适合作为用于内燃机的燃料来储存在机动车上。
背景技术
机动车,其内燃机以气态燃料、例如天然气(NG,即“Natural Gas”)运行,由现有技术充分已知。在此,天然气可以液态地(LNG,即“Liquid Natural Gas”)或气态地(CNG,即“Compressed Natural Gas”)保存在至少一个在机动车上携带的箱中。以液态形式的储存具有以下优点:空间需求较低。然而,天然气首先必须冷却到-161℃以下的温度,以便使其液化。
由公开文献DE 101 05 819 A1已知一种用于给以冷凝燃料运行的车辆供给燃料的设备,该设备包括安装在车辆上的、真空绝热的冷凝箱。该冷凝箱包围用于存储冷凝燃料的内部空间。冷凝箱通过供给管路与车辆的驱动机构连接。冷凝的燃料作为深冷的液化气体存在于冷凝箱中。因为不能完全排除一定的热量输入到冷凝箱的内部空间中,所以存储的液态气体的一部分气化并且在冷凝箱中上升,使得在冷凝箱的内部空间中构成位于液体空间上方的气体空间。在此,供给管路可以在液体空间或气体空间中开始。经由通到气体空间中的充注管路对冷凝箱进行充注。
在气态燃料、例如液态天然气(LNG)被供应用于燃烧之前,该气态燃料被施加以高压。在此,可能出现气态的泄漏量。如果该气态的泄漏量被引回到储存箱中,那么由于压力差和温度差可能出现对在储存箱中存在的平衡状态的干扰。此外,在将气态的泄漏量引回到储存箱中时可能形成气泡,使得存在以下危险:从储存箱中提取出气泡/液态气体混合物。
发明内容
本发明所基于的任务在于,给出一种用于低温介质、尤其用于液态天然气的储存箱,该储存箱使得能够将气态的泄漏量引回到储存箱中,具体说不会出现前述缺点。
为了解决该任务,给出上述用于低温介质的储存箱及其有利的扩展方案。
所提出的储存箱包括限界箱内室的箱壁,至少一个第一管路和第二管路穿过所述箱壁引到箱内室中。第一管路用于提取呈液态形式的介质。该第一管路限定一个提取部位,该提取部位布置在箱内室的底部区域中。根据本发明,用于引回介质的气态泄漏量的第二管路限定至少一个吹入部位,该吹入部位以相对于所述提取部位的距离a同样布置在底部区域中。
概念“底部区域”当前是指在按照规定地装入和使用储存箱的情况下箱内室的在测绘上处于深处的区域。也就是说,将气态泄漏量引回到包含深冷液态介质的区域中。引回的气体量以该方式与深冷的液态介质混合,使得所述气体量快速和高效地冷却到箱温度。因此,在储存箱中占主导的、液态相介质和气态相介质之间的平衡不会或仅不显著地被干扰。
通过在所提出的储存箱中,将所述吹入部位以相对于提取部位一定距离地布置的方式,同时减小以下危险:随着液态介质的提取吸入气泡。
优选地,储存箱或者说箱内室具有长的形状。例如,它可以具有柱体形。在该构型中,储存箱能够承受高压。在此,提取部位和吹入部位这样布置,使得距离a沿箱内室的纵长方向延伸。以该方式可以在提取部位和吹入部位之间保持大的距离,该大的距离进一步使气泡被吸入的危险减少。优选地,选择距离a大于箱内室的直径D。也就是说,优化地利用储存箱或者说箱内室的纵长延伸部。
此外优选地,第一管路和第二管路在储存箱的相对置的端部上穿过箱壁引到箱内室中。在储存箱或者说箱内室的长的形状的情况下,两个相对置的端部分别是储存箱的端侧。也就是说,两个管路优选分别在储存箱的端侧上被引到箱内室中。由此可以最大地选择提取部位和吹入部位之间的距离。
在本发明的扩展方案中提出,在提取部位和吹入部位之间布置有分隔元件,该分隔元件基本横向于箱内室的纵长延伸部延伸并且至少区段地贴靠在箱壁上。分隔元件将箱内室划分为布置有提取部位的第一区域和布置有吹入部位的第二区域。假如由于将气态泄漏量引回到储存箱中在吹入部位周围在液态介质中形成气泡,那么分隔元件防止气泡进入到提取部位的区域中。
优选地,分隔元件具有至少一个对于所述介质可通过的开口,该开口相对于吹入部位布置在测绘上的较深处。所述至少一个开口允许介质交换,其中,通过所述开口的布置保证仅液态介质到达分隔元件的另一侧。因为通过所述开口比吹入部位位于测绘上的较深处并且在液态介质中的气泡上升的方式,分隔元件构成对气泡的有效屏障。
为了构造所述至少一个开口,在其余部位贴靠在箱壁上的分隔元件可以具有在边缘侧的缺口,使得在分隔元件和箱壁之间产生穿流开口。
此外提出,分隔元件具有至少一个对于所述介质可通过的开口,该开口布置在箱内室中的液面上方。分隔元件的所述至少另一开口允许在箱内室的气体区的区域中的介质交换,使得在储存箱中占主导的平衡没有被分隔元件打破。在液面上方的所述至少另一开口同样可以通过分隔元件的在边缘侧的缺口构成,使得气态介质能够在分隔元件和箱壁之间穿流。
替代或补充地提出,分隔元件至少区段地由格栅结构构成。该格栅结构具有以下优点:它能够实现介质交换,因为液态介质可以流动穿过格栅结构。同时破坏可能包含在液态介质中的气泡,因为气泡在格栅结构上冷凝。
分隔元件构造为格栅结构可以局限于包含液态介质的区域上。在液面上方、也就是说在气体区的区域中,既不需要格栅结构也不需要分隔元件。因此,分隔元件向上不必完全引到箱壁上。
此外,替代或补充地提出,第二管路至少区段地实施为管,该管具有多个布置在周面上的开口,其中每个开口限定一个吹入部位。通过多个吹入部位产生许多小气泡,这导致对热交换有利的表面积增大。以该方式会更快或者还更高效地冷却引回的气体量。
设置在管中的开口可以任意地成型。例如,所述开口可以圆形或长形、尤其缝隙状地实施。
作为扩展的措施提出,所述至少一个吹入部位在箱内室侧被对于介质可通过的结构、尤其被金属纤维结构覆盖。所述结构或者所述金属纤维引起,经由吹入部位输入的气泡在所述结构或者所述金属纤维上冷凝。因为气泡已经在至少一个吹入部位上被破坏,所以不可能发生吸入气泡。
有利地,第一管路与泵连接。借助该泵可以将介质从储存箱中吸入并且供应给高压泵。在此,泵优选布置在储存箱外部上,以便保持最大的箱容积。
此外提出,在第二管路中布置有止回阀,该止回阀朝箱内室的方向打开。因此,止回阀一方面使得能够将气态泄漏量引回到储存箱中,另一方面防止介质的一部分经由第二管路从储存箱中流走。替代或补充地,也可以通过在储存箱中的合适的压力水平抑制介质从储存箱中流走。
附图说明
下面根据附图更进一步描述本发明的优选的实施方式。附图示出:
图1根据第一优选实施方式的本发明的储存箱的示意性的纵截面,
图2根据第二优选实施方式的本发明的储存箱的示意性的纵截面,
图3图2的储存箱的示意性的横截面,
图4根据第三优选实施方式的本发明的储存箱的示意性的纵截面,
图5图4的储存箱的分隔元件的立体示图,
图6根据第四优选实施方式的本发明的储存箱的示意性的纵截面,和
图7图6的放大的局部。
具体实施方式
在图1中示出的储存箱1用于储存低温介质2。在此,尤其可以涉及液态天然气(LNG)。介质2被接收在箱内室3中,该箱内室被箱壁4限界。箱内室3或者说储存箱1具有长形延伸的柱体形状,该柱体形状通过长度L和直径D限定。储存箱1在相对置的端侧上被倒圆。此外在每个端侧上,一个管路5,6穿过箱壁4引到箱内室3中。
第一管路5在箱内室3的底部区域8中构成提取部位7。借助与管路5连接的、布置在储存箱1外部上的泵18吸入储存在储存箱1中的液态介质2。第二管路6用于将气态的泄漏量引回到储存箱1中,其中,第二管路6限定吹入部位9。因为吹入部位9同样布置在底部区域8中,也就是说气态的泄漏量被带入到液态介质2中,所以在吹入部位9的区域中可能形成气泡。为了防止气泡经由第一管路5吸入,提取部位7和吹入部位9以距离a相对彼此地布置,其中,距离a大于直径D。也就是说,利用储存箱1的长度。
在图2中示出图1的储存箱的一个扩展方案。在此,在箱内室3中、具体说在提取部位7和吹入部位9之间布置有分隔元件10,该分隔元件横向于储存箱1的纵长方向延伸。分隔元件10具有两个开口11,12并且在其余部位贴靠在箱壁4上(参见图3),使得箱内室3被划分为两个区域。开口11构造在分隔元件10与箱壁4之间的底部区域8中,使得经由此开口液态介质2从一个区域到达另一区域中。这不适用于气泡,因为吹入部位9布置在开口11上方并且气泡由于浮力而上升。与之相对地,开口12布置在箱内室3的顶部区域20中,具体说在气化的介质2聚集的地方。因此,在箱内室3中存在位于上方的气体区,该气体区位于液面13上方。开口12确保在气体区的区域中的介质交换。
在图4中示出的本发明的储存箱1的实施方式中,分隔元件10由格栅结构14构成,该格栅结构构造多个用于介质交换的开口11(参见图5)。格栅结构14具有以下效应:包含在液态介质2中的气泡在格栅结构14上冷凝,使得所述气泡不被带入到提取部位7的区域中。
从图6中可得到本发明的另一优选的实施方式。在此,管路6由管15构成,该管具有周面的开口16。每个开口16构成一个吹入部位9。因此,引回的气体量被分配到多个吹入部位9上,由此将许多小气泡带入到液态介质2中。由此,气体体积的表面积增大,这导致所述气体体积更快地冷却。
在图6的储存箱1的扩展方案中(如在图7中所示的那样),管15可以在开口16的区域中被当前由金属纤维结构构造的结构17包围。所述结构具有以下效应:气泡在金属纤维上冷凝。
为了防止液态介质2经由吹入部位9和管路6从储存箱1中流走,在管路6中布置有止回阀19(参见图1,2,4和6)。然而,止回阀19不是强制必需的,因为通过相应的压力关系同样可以防止液态介质2从储存箱1中流走。
本发明不局限于所示实施方式,而是在权利要求的范围内也扩展成变型方案、尤其所示实施方式的特征的相互组合。
Claims (11)
1.一种用于低温介质(2)、尤其用于液态天然气的储存箱(1),包括限界箱内室(3)的箱壁(4),至少一个第一管路(5)和第二管路(6)穿过所述箱壁被引到所述箱内室(3)中,其中,所述第一管路(5)用于提取呈液态形式的介质(2)并且限定提取部位(7),所述提取部位布置在所述箱内室(3)的底部区域(8)中,
其特征在于,所述第二管路(6)用于引回所述介质(2)的气态泄漏量并且限定至少一个吹入部位(9),所述吹入部位相对于所述提取部位(7)隔开距离(a)地同样布置在所述底部区域(8)中。
2.根据权利要求1所述的储存箱(1),
其特征在于,所述箱内室(3)具有长的、优选圆柱体的形状,并且所述距离(a)沿所述箱内室(3)的纵长方向延伸,其中优选,所述距离(a)大于所述箱内室(3)的直径(D)。
3.根据权利要求1或2所述的储存箱(1),
其特征在于,所述第一管路(5)和所述第二管路(6)在所述储存箱(1)的相对置的端部上穿过所述箱壁(4)引到所述箱内室(3)中。
4.根据前述权利要求中任一项所述的储存箱(1),
其特征在于,在所述提取部位(7)和所述吹入部位(9)之间布置有分隔元件(10),所述分隔元件基本上横向于所述箱内室(3)的纵长延伸部延伸并且至少区段地贴靠在所述箱壁(4)上。
5.根据权利要求4所述的储存箱(1),
其特征在于,所述分隔元件(10)具有至少一个对于所述介质(2)能通过的开口(11),所述开口相对于所述吹入部位(9)布置在测绘上的较深处。
6.根据权利要求4或5所述的储存箱(1),
其特征在于,所述分隔元件(10)具有至少一个对于所述介质(2)能通过的开口(12),所述开口布置在所述箱内室(3)中的液面(13)上方。
7.根据权利要求4至6中任一项所述的储存箱(1),
其特征在于,所述分隔元件(10)至少区段地由格栅结构(14)构成。
8.根据前述权利要求中任一项所述的储存箱(1),
其特征在于,所述第二管路(6)至少区段地实施为管(15),所述管具有多个布置在周面上的开口(16),其中的每个开口限定一个吹入部位(9)。
9.根据前述权利要求中任一项所述的储存箱(1),
其特征在于,所述至少一个吹入部位(9)在箱内室侧被对于所述介质(2)能通过的结构(17)、尤其被金属纤维结构覆盖。
10.根据前述权利要求中任一项所述的储存箱(1),
其特征在于,所述第一管路(5)与泵(18)连接,所述泵优选布置在所述储存箱(1)的外部上。
11.根据前述权利要求中任一项所述的储存箱(1),
其特征在于,在所述第二管路(6)中布置有止回阀(19),所述止回阀朝所述箱内室(3)的方向打开。
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