CN101784833B - 深冷液体的储罐 - Google Patents
深冷液体的储罐 Download PDFInfo
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Abstract
一种用于建造深冷液体储罐的新工艺过程包括竖建独立站立的金属衬里。这个衬里的尺寸和结构能够承受在浇筑储罐的混凝土壁过程中产生的液压力,而无需给衬里下部的内表面增设暂时性的加强件。可将横向拉力系杆连接于衬里朝外表面上的锚定系杆,用于把衬里系牢于外模板。这些拉力系杆的间距约为2m。还可在衬里的外表面上设置锚定筋,以及可将深冷钢的圆筒形环与衬里做成一体。
Description
对相关申请的交叉参考
不适用。
关于联邦资助研究和研发的声明
不适用。
对高密度光盘附件的参考
不适用。
发明背景
技术领域
本发明总地涉及深冷液体储罐,尤其涉及“双”和“全”容积深冷液体储罐。
背景技术
液化天然气(LNG)通常是在约-261F(-163C)的温度下运输和储存。其它气体,包括氨、丙烷、丁烷、LPG(液化石油气)、乙烯、氧、氩、氮、氢、以及氦,通常是在低于环境温度的温度下以液相储存。LNG储罐一般是建造在现场的尺度为315,000-1,000,000桶(50,000-200,000立方米)的容器。
有一个辅助容积的那种形式的液体储罐是常见的。独立式的储罐往往包括一个用不锈钢、铝、9%镍钢、或适用于低温或深冷用途的其它材料制成的内罐。一个混凝土的容积外壁可提供辅助容积,以备万一内罐漏泄时之用。为降低传热,内罐通常是与混凝土外壁的内表面有间隔,而为隔热层留有空间。混凝土壁的内表面上的液体或蒸气阻挡层可防止外面的湿汽渗入隔热层以及防止LNG蒸气向外逸出。
常规的作法是,阻挡层是采用“粘贴”工艺过程或加“加强衬里”的工艺过程来形成。在粘贴工艺过程中,把一层薄的钢皮附连于在浇筑混凝土壁时埋置在混凝土里的许许多多钢带。在加强衬里工艺过程中,把一个衬里制备好以做成为混凝土壁浇筑抵靠其成形内模板的一部分。在浇筑模板里包括内部加强件以抵抗浇筑塑性混凝土时产生的载荷。在混凝土凝固之后,把内部加强件拆除,而将衬里留在混凝土的内表面上。
按常规,这些种类储罐的罐顶是在外壁内的内部空间里建造的,并且这只能在混凝土已浇筑完成并且用于浇筑混凝土壁所需的任何模板或加强件已从下部区域拆除的时开始。在采用常规的工艺过程时,对外壁开始施工和对罐顶开始施工之间需要一段相当长的时间。在天气可能严重地限制室外施工的时间周期的环境中,缩短这段工期可能是有利的。
发明内容
开发了一种用于建造深冷液体储罐的新工艺,可使这种储罐(特别是双容积或全容积储罐,它们有向内与衬里有间隔的特殊的主容积壁)的建造工期缩短三或四个月。
在这种新建造工艺中,竖建独立站立的钢质内衬里。衬里的尺寸结构能够承受浇筑混凝土壁时塑性混凝土的流体力,无需给储罐下部增设内部加强件。衬里可以有例如大于8mm的厚度。在外壁浇筑完工之前就可开始在衬里内部进行罐顶的建造,而不会与模板或内部加强件发生干涉,这可大大节省建造时间。
为了在混凝土外壁的浇筑过程中帮助保持衬里的正确定位,可将横向拉力系杆(tension tie)连接于衬里的外表面并把衬里系牢于外模板。在某些情况中,与常规的结构布置中所用的拉力系杆相比,使这些拉力系杆的间距更紧密一些,例如在3/4m到11/2m之间,而不是大于2m,可能是有利的。
为了确保衬里和完成的混凝土壁的牢固连接,可在衬里的朝外表面焊接上锚定筋,让这些锚定筋在浇筑外壁时埋在混凝土里。如果需要有角部热保护,可与衬里一体地设置深冷钢的环形环。
附图说明
参照附图,可以更好地理解本发明,各附图中:
图1是采用本发明的深冷液体储罐的一个实施例的部分地切掉的正视图;
图2是图1的储罐的一个角部的放大视图;
图3-9是表示正在用本发明的一种可能的变型来建造的储罐的不同建造阶段的视图;
图10和11是用在图1的储罐里的衬里的两块板的外表面的放大正视图;
图12和13是可用在衬里的外表面上的锚定件的从两个不同角度观看的放大视图;
图14是可用在衬里的外表面上的锚定筋的放大视图;
图15和16是穿过图3-9的储罐所见的已完工的混凝土壁的下部和上部的放大剖视图;
图17是表示在浇筑混凝土壁的过程中外模板的位置的示意图。
具体实施方式
图1表示出采用本发明的储罐10的一种可能的结构安排。图示的储罐是一个可用于储存LNG之类的深冷液体的全容积储罐。图示的储罐10有地板材料12(诸如多孔状玻璃隔热层、混凝土承载块、金属板、砂子或混凝土找平层,等等)、带有钢衬里16的混凝土外壁14、内罐18、以及罐顶20。隔热层22是位于外壁和内罐之间。下面将简单地讨论这些构件,并且讨论将以如何建造图示的储罐的一个例子来进行。
图示的储罐的构件
图1中所示的地板材料12由在桩25上的桩帽基础24支承着。也可以用各种替换的结构安排。
图示的混凝土外壁14约为36米高,从0.5米到0.8米厚成锥度,直径约为90米。万一内罐18漏泄,这样提供的内部体积足以容纳储罐的设计体积。尽管这个辅助容积容量是有用的,但它不是实现本发明所必不可少的。外壁的尺寸和构造都可以改变。
钢衬里16连接于混凝土壁14的面朝内的那一侧。图示的衬里主要是用16mm厚的钢板建造。也可以用其它厚度的钢板,只要形成的衬里的尺寸和构造能承受浇筑混凝土壁时产生的力,而不必对衬里下部的内表面增设暂时性的加强件,因为加强件会妨碍施工人员的进出。(这将在下文更详细讨论。)一般地说,希望用厚度大于8mm的钢板。
图示的储罐10包括角部热保护盆26,其可在图2中看得清楚。这个特特定的盆包括深冷钢制成的圆筒形环28,该环被做成与衬里16为一体。在这个图示中,深冷钢的环28构成衬里16的一个层,它被焊接于与之相邻的非深冷钢的上圈和下圈。即使不采用这样的盆或即使不对衬里16加以角部热保护,也可从本发明得到好处。但是,为了使垂向布置的板和水平布置的板的连接处的热膨/冷缩力为最小,一般希望在深冷液体储罐的角部设置热保护。如图所示,这一具体结构可被包含在本发明中。
由于埋置在混凝土外壁14里并以螺钉、焊接、或其它方式附连于衬里16的外表面的各金属杆件30的紧密间距,图示的储罐10可能不同于许多常规的储罐。这些金属杆件从衬里伸进外壁内。下面将讨论,这些金属杆件是在浇筑混凝土外壁时用作将内衬里保持到外模板的拉力系杆,因而它们的间距做得比常规储罐里更紧密。图示的那些金属杆件的间距约为1m,但本发明不要求就使用该间距。然而,一般地说,这些金属杆件的间距不要大于2m,优选的是在3/4m到11/2m之间。
从图1可看出,图示的内罐18可用作特殊的主容积壁,并且是向内地与混凝土外壁14有间隔。图示的内罐18高约33m,直径约88m,可提供约185,000立方米的储存容量。图示的内罐18是用11.8mx3.3m的深冷钢板制成的,当然本发明也可用于用其它材料制成的内罐。
图1所示的罐顶20是由浇筑在钢构架上的板上的混凝土制成的穹顶。下面将更详细讨论,图示的构架60(见图5)是在混凝土外壁14之内的空间里制作的并随后被提高到在储罐顶上的位置。尽管在采用这种罐顶时本发明可提供重要的优点,但本发明也可用于其它类型的罐顶。
图1所示的在混凝土外壁14和内罐18之间的隔热层22是珍珠岩和玻璃纤维毡,但对本发明来说,不是非用这些材料不可。
图示的储罐的建造
图3-9表示出可用于建造图示的储罐10的各个步骤。简言之,可通过先竖建独立站立的内部钢衬里而后在钢衬里和外模板之间浇筑混凝土外壁14,就可建成图示的储罐10的各个相关部分,不必给钢衬里的下部加设内部加强件。这可允许在浇筑外壁的同时进行罐顶20的构架60的施工。
图3表示出已完工的基础24。这里图示的基础包括在分级基础上的钢筋混凝土板。也可用其它的结构布置。如果需要,可包括排水道32、露天钢筋34、锚板36、垂向预应力管道28、以及诸如板材、槽钢、角钢之类的环形埋置件40。
图4表示出在埋在基础24里的环形埋置件40上建造衬里16的最初几层。下面将提到,在某些情况中,可将角部热保护盆的圆筒形环28包括在衬里里。可在外底蒸气阻挡层44的顶上加一道混凝土找平层42。
图示的衬里16可用诸如图10和11所示的板46建造。这两个图所示的板有焊接于其上的锚定系杆(anchor tie)48,其用于安装间距紧密的横向拉力系杆,这些拉力系杆可用于在浇筑混凝土外壁14时确保衬里系牢于外模板。图12和13描绘的锚定系杆48是工业品市场上可买到的。也可用其它类型的锚定系杆。与常规的构造相比,这些锚定系杆的间距较密,间距不大于2m,优选的是,水平方向的间距在3/4m到11/2m之间,以及垂向间距也在3/4m到11/2m之间。
图示的用于衬里16的板46还有锚定筋50,它们帮助把衬里连接于混凝土外壁14(图10、11和14)。在浇筑外壁时,这些锚定筋变成被埋在混凝土外壁14里。图示的锚定筋,从图14可看得更清楚,是钢制的并且它们的间距约为400mm。在大多数情况中,也可用其它的材料和其它的间距。
图5表示浇筑混凝土外壁14的过程的开始。在这一例子中,用外模板52逐次提升3.5m高来浇筑外壁。按照图17所示的情况,随着施工的进展,可将模板从较低的提升“跳跃”到较高的提升。如有必要,在每次提升浇筑之前,可放进钢筋54(图15)、后张拉管道56(图6)、其它埋置件、以及用于形成暂时性建造开口57的模件。用作拉力系杆的各金属杆件30(图2)被连接于各锚定系杆48而用于保持衬里16和外模板52之间所希望的间距。在浇筑完成和拆除外模板之后,可将拉力系杆的可能突出于混凝土壁的外表面的端头割掉,而将原金属杆的一些部分留在混凝土壁内。
随着混凝土外壁14的施工进展,可以完成衬里16的建造。在需要的情况下,可给衬里的上部增加暂时性的内或外加强,以提供抗风能力和圆度控制。对储罐下部的衬里内表面不采用加强件可保留内部地板上的活动空间,这样,竖建衬里的钢结构工人就可立即开始施工罐顶20的构架60(图5)以及施工平台板(deck)62(图5),而不必等到混凝土工人浇筑完外壁并随后拆除否则就将占用内部空间的模板之后才开始施工。
图6表示在衬里16完工之后可将罐顶20的构架60和铺板62升高或就位。可将升高的构架连接于安装在衬里的顶边缘上的受压钢筋64。可以在构架定位之前或之后把罐顶板31安装在罐顶构架上由构架来支承它们(图1)。可以用平台板吊杆66把平台板悬吊于构架。一旦甲板升高完成,就可完成储罐内的其它工作,诸如以下各层的安装:多孔状玻璃隔热层68的安装、上覆的砂子层70、环形底板72(都可从图2看出)。从图6可见,有时甚至可以在混凝土壁的最后一次提升之前进行罐顶构架的定位,这可使通常的建造工期大为缩短。
图7表示混凝土外壁14的施工在继续进行,同时储罐10内的工作也在进行。在这一图示中,角部热保护盆26的施工已开始,以及辅助容积的底74的钢板和混凝土圈梁76已经安装在一些前已铺设的地板材料12上。
图8表示混凝土外壁14的最后一次提升已完成,同时内罐18(图1)的底的施工在继续进行。在这一阶段,另一个隔热层78和另一砂子层80(从图2可看出)已经加在辅助容积的底74上,并且内罐的环板82已经定位在混凝土圈梁76上。在罐顶上,已经放置好了用于浇筑覆盖罐顶板31的混凝土的钢筋84,以及混凝土托臂86已经在外壁顶上浇筑好,覆盖了受压钢筋64。
图9表示罐顶20的浇筑已经完成以及内罐18的施工在继续进行。在这一图示中,内罐底板88已经铺在了上砂子层80(图2)上并已连接于内罐环板82,且内罐18的壳体的施工已经开始。
这些描述是为了说明的目的。很明显,本技术领域的普通技术人员,在不偏离本发明的实质的情况下,可做出各种修改和改变。本发明的整个范围阐明于权利要求书中。
Claims (17)
1.一种用于深冷液体的储罐,包括:
具有面朝内的侧面的混凝土壁;
在所述混凝土壁的所述面朝内的侧面上的钢衬里,所述衬里的尺寸和结构能承受浇筑所述混凝土壁时产生的力,而无需在所述储罐的下部设置附连于所述衬里的内表面的加强件。
2.如权利要求1所述的储罐,其特征在于,所述衬里的厚度大于8mm。
3.如权利要求1所述的储罐,其特征在于,所述储罐还有特殊的主容积壁,以及所述衬里向外地与所述主容积壁有间隔。
4.如权利要求1所述的储罐,其特征在于,它还有角部热保护盆,所述热保护盆设有与所述衬里做成一体的深冷钢的圆筒形环。
5.如权利要求1所述的储罐,其特征在于,它还有埋置在所述混凝土外壁内并附连于所述衬里的朝外的表面的金属杆件。
6.如权利要求1所述的储罐,其特征在于,它还有从所述衬里伸进所述外壁并暂时性地附连于混凝土模件的间距紧密的金属杆件,这些杆件的间距不大于2m。
7.如权利要求1所述的储罐,其特征在于,它还有从所述衬里伸进所述外壁的间距紧密的金属杆件,这些杆件的间距在3/4m到11/2m之间。
8.如权利要求1所述的储罐,其特征在于,所述衬里的尺寸和结构能够承受浇筑所述混凝土外壁时产生的力,无需附连于所述衬里的所述内表面的暂时性的加强件。
9.如权利要求1所述的储罐,其特征在于,所述混凝土壁是外壁。
10.一种用于建造深冷液体储罐的方法,其采用以下步骤:
竖建独立站立的钢质内衬里;
在所述衬里上浇筑混凝土外壁,无需对所述衬里的下部的内表面进行暂时性的加强。
11.如权利要求2所述的方法,其特征在于,所述衬里的厚度大于8mm。
12.一种用于建造储罐的方法,其采用权利要求10所述的那些步骤以及还采用竖建向内地与所述衬里有间隔的特殊的主容积壁的步骤。
13.如权利要求10所述的方法,其特征在于,它还采用设置角部热保护盆的步骤,所述热保护盆设有与所述衬里做成一体的深冷钢的圆筒形环。
14.如权利要求10所述的方法,其特征在于,它还采用在浇筑所述外壁之前在所述衬里的朝外表面焊接上锚定筋并在浇筑所述外壁时把这些锚定筋埋在所述外壁内的步骤。
15.如权利要求10所述的方法,其特征在于,它还采用以下步骤:
用间距紧密的横向拉力系杆把外模板系牢于所述衬里,所述拉力系杆的间距不大于2m;以及
在所述衬里和所述外模板上浇筑所述外壁。
16.如权利要求10所述的方法,其特征在于,它还采用以下步骤:
用间距紧密的横向拉力系杆把外模板系牢于所述衬里,所述拉力系杆的间距在3/4m到11/2m之间;以及
在所述衬里和所述外模板浇上浇注混凝土以构筑所述外壁。
17.如权利要求10所述的方法,其特征在于,在所述混凝土外壁浇筑完工之前就可开始在所述衬里内部建造罐顶。
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CA2689593C (en) | 2012-03-20 |
CN101784833A (zh) | 2010-07-21 |
US20080302804A1 (en) | 2008-12-11 |
US8603375B2 (en) | 2013-12-10 |
CA2689593A1 (en) | 2008-12-18 |
US9726326B2 (en) | 2017-08-08 |
RU2430295C2 (ru) | 2011-09-27 |
RU2009148806A (ru) | 2011-07-20 |
WO2008154169A1 (en) | 2008-12-18 |
US20140097189A1 (en) | 2014-04-10 |
AU2008262151B2 (en) | 2012-07-05 |
GB0922439D0 (en) | 2010-02-03 |
GB2462786A (en) | 2010-02-24 |
PE20090335A1 (es) | 2009-04-01 |
AU2008262151A1 (en) | 2008-12-18 |
GB2462786B (en) | 2011-12-21 |
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