Superheater inlet/outlet header
United States Patent 4276928
A heat exchanger having a shell lined with a plurality of heat transfer tubes, heat exchange surface disposed within the shell and submerged in a first heat transfer fluid, and a tube manifold penetrating through the shell and directing a second heat transfer fluid to and from the heat exchange surface. The tube manifold has an elongated L-shaped outer enclosure which has one leg disposed within the shell and the other leg penetrating through the shell, and an elongated L-shaped inner tube which passes through the outer enclosure. A first fluid flow path through the tube manifold is established through the inner tube and a second fluid flow path through the tube manifold is established between the inner tube and the outer enclosure.
Inventors:
Blaskowski, Henry J. (West Simsbury, CT)
Application Number:
Publication Date:
07/07/1981
Filing Date:
02/12/1979
Export Citation:
Combustion Engineering, Inc. (Windsor, CT)
Primary Class:
Other Classes:
165/DIG.65
International Classes:
F22B37/22; F22G3/00; F28F9/02; (IPC1-7): F28F5/00
Field of Search:
176/38, 176/60, 176/65, 122/32, 122/34, 165/158, 165/160, 165/81, 165/82
View Patent Images:
&&&&&&PDF help
US Patent References:
3888730Jackson176/653520356Bell et al.165/1583125161N/ARomanos165/159
Primary Examiner:
Scott, Samuel
Assistant Examiner:
Streule Jr., Theophil W.
Attorney, Agent or Firm:
Habelt, William W.
What is claimed is:
1. A heat exchanger of the type for transferring heat between two heat transfer fluids without contact between the two fluids, comprising:
b. a first plurality of heat exchange tubes lining the interior of the shell thereby defining a chamber within the shell for containing a first
c. an elongated L-shaped outer enclosure having one leg disposed within said shell chamber and the other leg penetrating through and welded d
d. an elongated L-shaped inner tube disposed within said outer enclosure and spaced radially therefrom to provide an annula said inner tube having one leg rigidly connected to one leg of said outer enclosure and the other leg rigidly connected to the other leg of said outer enclosure at a point external of the shell, the interior of said inner tube defining a first flow path through said outer enclosure and said annular space defining a second flow path through
e. a second plurality of heat exchange tubes disposed within said shell chamber and interconnected in fluid communication between said annular chamber and said inner tube, said tubes providing a flow passageway for passing the second heat transfer fluid in heat exchange relationship with the first heat exchange fluid such that the temperature of the second heat transfer fluid is higher within said inner tube than within
f. means for passing the second heat transfer fluid first through the plurality of heat exchange tubes lining the interior of the shell, thence through said annular chamber, thence through said second plurality of heat exchange tubes, and thence out of the shell through said inner tube.
2. A heat exchanger as recited in claim 1 further comprising a division plate disposed between said inner tube and said outer enclosure and secured thereto so as to provide a rigid connection therebetween, the division plate providing a fluid-tight division of said annular chamber of said outer enclosure into a first chamber and a second chamber, the inner tube passing through said first chamber and opening into said second chamber.
3. A steam generating heat exchanger of the type wherein hot gases are cooled by evaporating water into steam and superheating said steam comprising:
a. a shell through the interior of which the
b. a first plurality of heat exchange tubes through which saturated water is passed in heat exchange relationship with the hot gases passing through said shell to generate steam, said tubes disposed to line the interior of said shell thereby protecting the shel
c. a steam drum for collecting the steam and saturated water leaving said first plurality of
d. an elongated L-shaped outer enclosure having one leg disposed within the interior of said shell and the other leg penetrating through and
e. an elongated L-shaped inner enclosure disposed within said outer enclosure and spaced radially therefrom to provide an annular space therebetween, said inner tube having one leg rigidly connected to one leg of said outer enclosure and the other leg rigidly connected to the other leg of said outer enclosure at a point external of the shell, the interior of said inner tube defining an outer header through which superheated steam passes out of said shell and said annular space defining an inlet header through which saturated steam en
f. a second plurality of heat exchange tubes disposed within the interior of said shell and interconnected in fluid communication between said annular chamber and said inner tubes, said tubes providing a flow passageway for passing saturated steam from the inlet header of said annular chamber in heat exchange relationship with the hot gases to the outlet heade
g. means for passing saturated water from said drum through said first plurality of heat exchange tubes wherein steam is generated and returning the mixture of steam and saturated water leaving sai and
h. means for passing saturated steam from said drum to the inlet header of said annular chamber, thence through said second plurality of heat exchange tubes, and thence out of said shell through the outlet header of said inner tube.
Description:
BACKGROUND OF THE INVENTIONThis invention relates to a tube manifold of the type that directs the flow of a heat transfer fluid to and from a heat exchanger immersed in another heat transfer fluid and, more particularly, to a combined inlet/outlet header for directing the flow of steam through a superheater disposed in the flue gas stream. It is often necessary to transfer heat between two fluids without the two fluids coming into contact. This is frequently done by submerging a heat exchanger in a first heat transfer fluid and passing a second heat transfer fluid through the heat exchanger, such that the fluids pass along opposite sides of the heating surface and heat is transferred between the two fluids across the heating surface. A conventional heat exchanger of this type comprises a shell adapted to confine the first heat transfer fluid, a heat exchanger typically in the form of a bundle of tubes submerged in the first heat transfer fluid, and a tube manifold for directing the flow of the second heat transfer fluid through the shell to the heat exchanger, through the heat exchanger and back out of the shell. A major problem is encountered when utilizing such a heat exchange arrangement if there is a substantial difference in temperature between the two heat transfer fluids or if the second heat transfer fluid undergoes a substantial temperature change as it passes through the heat exchanger resulting in a sizable temperature gradient within the tube manifold itself. Temperature differences such as these result in thermal stresses between the shell that confines the first heat transfer fluid and the tube manifold where it penetrates the shell, and also within the tube manifold itself. If there is a substantial temperature difference between the shell and the tube manifold, the resulting thermal stresses could cause rupture of the weld joining the tube manifold to the shell and destroy the seal therebetween. In practice, this problem is typically avoided by incorporating a nozzle into the shell and a thermal sleeve in the tube manifold at the point where the tube manifold passes through the nozzle and out of the shell. If substantial temperature differences exist within the tube manifold, the resulting thermal stresses could result in rupture of the tube manifold and destroy the required separation between the inlet and outlet fluid pathways through which the second heat transfer fluid passes. This difficulty is most often avoided by providing a flexible section of piping within the tube manifold to absorb the differential expansion between the inlet and outlet pathways or by providing a fluid-tight slip joint arrangement at the point where the inlet and outlet pathways contact so as to permit differential expansion therebetween. Accordingly, it is the purpose of this invention to provide a heat exchanger incorporating a tube manifold of unique design, thereby eliminating the aforementioned thermal stress problems and providing a simplified construction. SUMMARY OF THE INVENTION The present invention provides a heat exchanger having a shell, the interior of which is lined with a plurality of heat transfer tubes, for confining a first
a heat exchanger disposed within the shell and submerged in the first and a tube manifold penetrating through the shell and directing a second heat transfer fluid to and from the heat exchanger. The tube manifold has an elongated L-shaped outer enclosure which has one leg disposed within the shell and the other leg penetrating through the shell, and an elongated L-shaped inner tube which passes through the outer enclosure thereby establishing a flow pathway therethrough and which is rigidly mounted at one end to one end of the outer enclosure and at its other end to the other end of the outer enclosure. If it is desired to heat a second heat transfer fluid by passing it in heat exchange relationship with a first heat transfer fluid, the cold second heat transfer fluid is passed upward through the tubes lining the interior of the shell to cool the shell and then passes through the outer enclosure of the tube manifold to the heat exchanger. The heated second heat transfer fluid returns from the heat exchanger and passes through the inner tube of the tube manifold and out of the shell. Thus, the heated portion of the second heat transfer fluid is confined within the inner tube of the tube manifold and is completely surrounded by the cold portion of the second heat transfer fluid flowing within the outer enclosure. Thermal stress between the shell and the tube manifold is eliminated because the outer enclosure of the tube manifold and the shell are both in direct contact with the cold second heat transfer fluid and maintained at approximately the same temperature. Because of the L-shaped design of the inner tube and the outer enclosure and despite the rigid connection therebetween at their ends, the inner tube is permitted to freely expand or contract at the elbow thereby eliminating any thermal stress within the tube manifold due to the differential expansion between the inner tube and the outer enclosure.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention may be better understood by reference to the accompanying drawings wherein: FIG. 1 is a sectional view of a tube manifold constructed in accordance with the invention and shown at the point where the tube manifold penetrates the
FIG. 2 is a view in cross section taken along line 2--2 of FIG. 1; FIG. 3 is a view in cross section taken along line 3--3 of FIG. 1; and FIG. 4 is a sectional side elevation view of a steam generating heat exchange apparatus incorporating a tube manifold of FIG. 1 as a superheater inlet/outlet header.
DESCRIPTION OF THE PREFERRED EMBODIMENT The heat exchange apparatus shown in FIG. 1 constitutes a representative means of providing heat exchange between two heat transfer fluids in accordance with the present invention. Heat exchange surface 6 is submerged within the first heat transfer fluid confined within shell 2. Shell 2 is typically a thick structural wall such as a pressure containment vessel and, in accordance with the invention, is lined by a plurality of heat exchange tubes 4. Taken together, shell 2 and heat transfer tubes 4 define a chamber 40 in which the first heat transfer fluid, which may be a liquid or a gas, hot or cold, quiescent or flowing, is confined. Tube manifold 10 is formed of an elongated L-shaped outer enclosure 12 and an elongated L-shaped inner tube 14 which passes through the outer enclosure 12. One end of inner tube 14 is rigidly mounted to one end of outer enclosure 12 and the other end of inner tube 14 is rigidly mounted to the other end of outer enclosure 12. As seen in FIG. 1, tube manifold 10 is orientated with respect to shell 2 such that one leg of tube manifold 10 is completely disposed within chamber 40 and the other leg of tube manifold 10 penetrates through shell 2 to the outside. A first fluid flow path 30 through tube manifold 10 is established through inner tube 14, and a second fluid flow path 20 through tube manifold 10 is established between inner tube 14 and outer enclosure 12. Heat exchanger 6 is connected between the second fluid flow pathway 20 and the first fluid flow pathway 30 of tube manifold 10 so as to establish a flow path whereby the second heat transfer fluid is passed in heat exchange relationship with the first heat transfer fluid as the second heat transfer fluid passes between the first flow path 30 and the second flow path 20 of tube manifold 10. Flow nozzle 8 opens into and is welded to the outer enclosure wall of tube manifold 10 at a location outside of the shell 2. In the preferred embodiment, the outer enclosure 12 is divided into a first chamber 20 and a second chamber 50 by division plate 16. Inner tube 30 is disposed within the outer enclosure 12 and has one end secured to division plate 16 so as to provide a flow path from the second chamber 50 through the first chamber 20 to the outside. Heat exchanger 6 is connected between the first chamber 20 and the second chamber 50 and provides a heat exchange flow path therebetween. A ceramic tile cap 22 is secured to the end of the outer enclosure disposed within chamber 40 of shell 2 and serves to protect the end of tube manifold 10 from impingement by the first heat transfer fluid, which could frequently be a hot, corrosive flue gas. The operation of the heat exchanger can best be explained and its advantages made most apparent when discussing the use of the heat exchanger to superheat steam, as illustrated in FIG. 4, by passing saturated steam through heat exchange surface immersed in a hot flue gas stream. In operation, saturated or slightly subcooled water will be circulated upwards through heat transfer tubes 4 lining shell 2 thereby protecting shell 2 from the hot gases flowing through chamber 40 and cooling shell 2 as the water passing through heat transfer tubes 4 evaporates into steam. The steam/water mixture leaving tubes 4 would be directed to a steam drum 60, wherein the steam/water mixture would be separated into saturated steam and saturated water. The saturated water would then be mixed with additional makeup feed water and recirculated through heat transfer tubes 4 to cool shell 2. The saturated steam would be passed to tube manifold 10 entering the first chamber 20 of the outer enclosure 12 through nozzle 8. The saturated steam would then pass from the first chamber 20 of outer enclosure 12 through heat exchange surface 6, preferably a plurality of tubes formed into a tube bundle, and reenter the outer enclosure 12 and be collected as superheated steam in the second chamber 50. The superheated steam would then pass through first chamber 20 and out of shell 2 by way of the inner tube 30. Division plate 16 would serve to separate the first chamber 20 from the second chamber 50 and thereby preclude mixing of the saturated and superheated steam. The saturated or slightly subcooled water passing through heat exchange tubes 4 serves to cool the shell 2 to a metal temperature at or near the saturation point. Similarly, the saturated steam passing through the first chamber 20 serves to protect the outer enclosure 12 from the high temperature superheated steam passing through inner tube 14 and to maintain the outer enclosure 12 at a metal temperature at or near the saturation temperature. Therefore, there is no thermal stress developed between the shell and the outer enclosure at the point where the outer enclosure penetrates the shell. Accordingly, tube manifold 10 may be welded to the shell 2 without fear of rupture from thermal stresses. As superheated steam is returned from heat exchange surface 6 through fluid flow passage 30, inner tube 14 will heat to a metal temperature at or near the temperature of the superheated steam, a temperature significantly higher than saturation temperature. Because outer enclosure 12 is at or near the saturation temperature, there is a differential thermal expansion between the outer enclosure 12 and the inner enclosure 14. In particular, inner tube 14 would tend to lengthen as it is heated above the saturation temperature while the outer enclosure 12 would tend to remain the same length because of the cooling provided by the saturated steam. As seen in FIG. 1, inner tube 14 is rigidly connected to outer enclosure 12 at a point outside of the shell and also is rigidly connected to the outer enclosure 12 at its other end through division plate 16. Therefore, the inner tube 14 would tend to expand horizontally inward towards chamber 40 and vertically downward away from division plate 16. Because of the elbow incorporated in the L-shaped design of inner tube 14, inner tube 14 is free to expand by distorting radially outward at the elbow. This relieves any thermal stress and prevents the rupture of inner tube 14. If, on the other hand, inner tube 14 had been a straight length of pipe without any elbow, the thermal expansion required to relieve the stress would have resulted in rupture. It should be noted that although the L-shaped is preferred for inner tube 14 and correspondingly for the outer enclosure 12, any curvilinear shape having at least one elbow would suffice. Accordingly, it is to be understood that the term L-shaped is herein to be read to incorporate any curvilinear shape embodying an elbow, for example a Z-shape tube, a 45° elbow, a 30° elbow, or even a coil-like shape. While a representative embodiment of the present invention has been shown and described for purposes of illustration, it is apparent that the heat exchange apparatus described herein may be used to cool the second heat transfer fluid by passing it through heat exchange surface 6 in heat exchange relationship with a cold fluid flowing in chamber 40 and over heat exchange surface 6 simply by reversing the direction of flow through the tube manifold. Therefore, the invention described herein is not to be construed as limited to the specific embodiment of a superheater inlet/outlet header as described but is intended to encompass all variations thereof coming within the scope of the claims.
& 2004-. All rights reserved.gas inlet plug是什么意思及反义词
沪江词库精选gas inlet plug是什么意思、英语短语。
gas inlet plug的中文解释： 进汽口塞
英语短语推荐
2015gas inlet plug是什么意思由沪江网提供。查看: 192|回复: 10
(784644号)
应助1 帖数612 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID784644积分38魅力10 点财富2038 点主题威望1 点贡献点0 点阅读权限30注册时间在线时间486 小时活动点0 点当月幸运0 点毕业学校东北大学最后登录
海川小学3年级, 积分 38, 距离下一级还需 12 积分
帖子魅力10 点财富2038 点威望1 点贡献点0 点当月幸运0 点注册时间在线时间486 小时最后登录
1、Does the steam inlet pipe have a top take-off from the main header to minimize moisture induction?
2、Is there a piping run or dead leg beyond the&&take-off?
3、water legs 是 “水击现象”的意思吗？
4、Has a full-relief valve been installed in the&&exhaust system upstream of the first shut-off valve?setting?
5、None of the recommended start-up and operating procedures contained in this manual shall be construed in any way as relieving the user of his responsibility for compliance with the requirements of any regulatory body, or for the exercise of normal good judgment in the start-up , operation, and care of the turbine
这几句话怎么翻译呢？恳请高手解答！O(∩_∩)O谢谢！
最近访问(20位)
good topic
总评分:&财富 + 13&
1、本主题及回复中所有言论和图片、内容纯属会员个人意见，仅供参考，与本站立场无关
2、本内容由该帖子作者发表，帖子作者须承担一切因本内容发表而直接或间接导致的民事或刑事法律责任
3、如作者的言论侵犯到任何版权或争议问题 第三方负面信息，请立即告知本站并举证，本站将予与删除 管理员信箱：
(872238号)
应助15 帖数439 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID872238积分92魅力82 点财富5290 点主题威望1 点贡献点0 点阅读权限150专业石化英语翻译注册时间在线时间603 小时活动点0 点当月幸运1 点最后登录
热心参与帮助他人，被设定为10次最佳应助回复 即可领取本徽章
TA在日10时59分获得了这枚徽章。 []
帖子魅力82 点财富5290 点威望1 点贡献点0 点专业石化英语翻译当月幸运1 点注册时间在线时间603 小时最后登录
1、Does the steam inlet pipe have a top take-off from the main header to minimize moisture induction? 蒸汽入口管线是否在顶部有一个从总管引出的管段来降低湿度？（这个降低湿度是我猜测，请高手斧正）
2、Is there a piping run or dead leg beyond the&&take-off? 在入口引出管上方是否有导向管或盲管段？
3、water legs 是 “水击现象”的意思吗？这个是水夹套，控制水涨落速度的装置
4、Has a full-relief valve been installed in the&&exhaust system upstream of the first shut-off valve?setting? 在排气系统中第一个关断阀前是否按有一个完全泄压阀？其设定值是多少？
5、None of the recommended start-up and operating procedures contained in this manual shall be construed in any way as relieving the user of his responsibility for compliance with the requirements of any regulatory body, or for the exercise of normal good judgment in the start-up , operation, and care of the turbine 本操作手册使用者在遵守本手册建议的开工和操作程序的同时，在本透平开工、操作及维护过程中也要遵守监管机构提出的要求，并保持自己正常的判断力。
以上是我粗浅的理解。您上次发的时候我看到了，但是因为自己理解不够，未敢造次。现在献丑，等高人指点。如有不妥，欢迎指正。共同提高。
&第一条理解有些偏差，第三条大意对了，表述没到位。2,4,5翻译得很好。&
&Has inlet and exhaust piping been drained at low points or trapped to avoid water legs?这里的water legs也是水夹套的意思吗？那应该怎么翻译呢？O(∩_∩)O谢谢！&
&非常感谢您的答复！最后一句我是这样翻译的，不知正确与否，我觉得应该是个免责声明：手册里推荐的启动和操作程序，不能用于其他解释，如减轻用户应该配合的受监管机构监督的责任，或者用于减轻用户对开车、操作和汽&
积极帮助他人解决问题
系统自动给沙发加分～～
总评分:&财富 + 16&
(784644号)
应助1 帖数612 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID784644积分38魅力10 点财富2038 点主题威望1 点贡献点0 点阅读权限30注册时间在线时间486 小时活动点0 点当月幸运0 点毕业学校东北大学最后登录
海川小学3年级, 积分 38, 距离下一级还需 12 积分
帖子魅力10 点财富2038 点威望1 点贡献点0 点当月幸运0 点注册时间在线时间486 小时最后登录
Ophelia280 发表于
1、Does the steam inlet pipe have a top take-off from the main header to minimize moisture induction ...
非常感谢您的答复！最后一句我是这样翻译的，不知正确与否，我觉得应该是个免责声明：手册里推荐的启动和操作程序，不能用于其他解释，如减轻用户应该配合的受监管机构监督的责任，或者用于减轻用户对开车、操作和汽轮机维护做出正确判断的责任。
麻烦您帮我看看我翻译的对不对？O(∩_∩)O谢谢！也期待着各位英语达人的不吝指点！
&个人感觉ophelia的版本好一点&
总评分:&财富 + 5&
(784644号)
应助1 帖数612 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID784644积分38魅力10 点财富2038 点主题威望1 点贡献点0 点阅读权限30注册时间在线时间486 小时活动点0 点当月幸运0 点毕业学校东北大学最后登录
海川小学3年级, 积分 38, 距离下一级还需 12 积分
帖子魅力10 点财富2038 点威望1 点贡献点0 点当月幸运0 点注册时间在线时间486 小时最后登录
Ophelia280 发表于
1、Does the steam inlet pipe have a top take-off from the main header to minimize moisture induction ...
Has inlet and exhaust piping been drained at low points or trapped to avoid water legs?这里的water legs也是水夹套的意思吗？那应该怎么翻译呢？O(∩_∩)O谢谢！
&我认为这里的water leg 是指积水。这句话是问管线上是否有低点放凝以避免管道积水。&
建议给出 water leg的上下文语境
总评分:&财富 + 5&
(872238号)
应助15 帖数439 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID872238积分92魅力82 点财富5290 点主题威望1 点贡献点0 点阅读权限150专业石化英语翻译注册时间在线时间603 小时活动点0 点当月幸运1 点最后登录
热心参与帮助他人，被设定为10次最佳应助回复 即可领取本徽章
TA在日10时59分获得了这枚徽章。 []
帖子魅力82 点财富5290 点威望1 点贡献点0 点专业石化英语翻译当月幸运1 点注册时间在线时间603 小时最后登录
小破孩GK 发表于
Has inlet and exhaust piping been drained at low points or trapped to avoid water legs?这里的water ...
我认为这里的water leg 是指积水。这句话是问管线上是否有低点放凝以避免管道积水。
&嗯嗯....很有道理！按照语境的话应该是这个意思，采纳啦！谢谢您的回答！&
应助0 帖数237 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID95922积分31魅力28 点财富877 点主题威望0 点贡献点0 点阅读权限30注册时间在线时间473 小时活动点0 点当月幸运0 点最后登录
E&I 项目工程师
海川小学3年级, 积分 31, 距离下一级还需 19 积分
帖子魅力28 点财富877 点威望0 点贡献点0 点当月幸运0 点注册时间在线时间473 小时最后登录
这里的Take-off是否可以理解为蒸汽管线上的排水装置，将凝结水排出可以降低蒸汽的湿度。
以上为个人愚见，如有偏差，敬请专业人士指正。
总评分:&财富 + 5&
&&~Save the trees for our future children. Think twice before you start printing unnecessary e-mails or documents.~
(193890号)
应助0 帖数15 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID193890积分16魅力16 点财富18 点主题威望0 点贡献点0 点阅读权限20注册时间在线时间12 小时活动点0 点当月幸运0 点最后登录
海川小学2年级, 积分 16, 距离下一级还需 4 积分
帖子魅力16 点财富18 点威望0 点贡献点0 点当月幸运0 点注册时间在线时间12 小时最后登录
take-off可以理解为‘采出’ 的意思。
Does the steam inlet pipe have a top take-off from the main header to minimize moisture induction?
如果没有问号就好翻译了。
确保蒸汽进气管由总集气管顶部采出以减低水分夹带。
&我在专业词典上查了一下，貌似就是普通的飞机起飞的意思，但结合语境的话，我觉得您说的有一定的道理！谢谢您的回答！&
同意你的观点
总评分:&财富 + 9&
(784644号)
应助1 帖数612 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID784644积分38魅力10 点财富2038 点主题威望1 点贡献点0 点阅读权限30注册时间在线时间486 小时活动点0 点当月幸运0 点毕业学校东北大学最后登录
海川小学3年级, 积分 38, 距离下一级还需 12 积分
帖子魅力10 点财富2038 点威望1 点贡献点0 点当月幸运0 点注册时间在线时间486 小时最后登录
Ophelia280 发表于
我认为这里的water leg 是指积水。这句话是问管线上是否有低点放凝以避免管道积水。
嗯嗯....很有道理！按照语境的话应该是这个意思，采纳啦！谢谢您的回答！
(784644号)
应助1 帖数612 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID784644积分38魅力10 点财富2038 点主题威望1 点贡献点0 点阅读权限30注册时间在线时间486 小时活动点0 点当月幸运0 点毕业学校东北大学最后登录
海川小学3年级, 积分 38, 距离下一级还需 12 积分
帖子魅力10 点财富2038 点威望1 点贡献点0 点当月幸运0 点注册时间在线时间486 小时最后登录
moffeeis 发表于
take-off可以理解为‘采出’ 的意思。
Does the steam inlet pipe have a top take-off from the main hea ...
我在专业词典上查了一下，貌似就是普通的飞机起飞的意思，但结合语境的话，我觉得您说的有一定的道理！谢谢您的回答！
(334523号)
应助38 帖数3955 个收听数个人主页兴趣爱好吃饭睡觉上海-川自我介绍长安米贵,居之不易.精华0听众数分享帖子相册日志好友记录UID334523积分5093魅力4878 点财富10025 点主题威望28 点贡献点2 点阅读权限220专业化学工程注册时间在线时间3177 小时活动点20 点当月幸运2 点毕业学校浙江大学最后登录
平沙的管辖
小满未满，得大欢喜
已提交版主身份信息登记
TA在日15时10分获得了这枚徽章。 []
热心参与帮助他人，被设定为10次最佳应助回复 即可领取本徽章
TA在日15时37分获得了这枚徽章。 []
在线时间达到2400小时，可以直接领取本徽章。
TA在日18时04分获得了这枚徽章。 []
2013年海川十佳会员 及 十佳版主
最佳技术参与者 均可佩戴本徽章。
TA在日21时08分获得了这枚徽章。 []
海川社区常住居民 在海川签到500天 可领本徽章
TA在日09时18分获得了这枚徽章。 []
发起组织过成功的多次海川活动，本奖由管理员人工审核发送。
TA在日09时44分获得了这枚徽章。 []
发帖数超过2000个即可自领本徽章
TA在日20时46分获得了这枚徽章。 []
申领前提条件为3威望，对海川热心参与的会员
TA在日20时45分获得了这枚徽章。 []
帖子魅力4878 点财富10025 点威望28 点贡献点2 点专业化学工程当月幸运2 点注册时间在线时间3177 小时最后登录
本帖最后由 平沙 于
21:19 编辑
1.top take off 是非常直观的说法，工艺上称之为“上抽头”。就是蒸汽管线的分支只允许从上面抽分支（上抽头），或者平着抽分支（平抽头）。向下接分支（下抽头）的会被骂，因为下面有凝液。蒸汽一般在上面。简单吧，哈哈，道理就是一说就懂。
2. water leg 我在有个项目见到过类似的说法，指“水封”，就是用来平衡前后两处压力差的一段水柱。
对于全真空系统，我们常把10.6米的water leg形象地称之为“大气腿”，注意哦，不是要你去抱大腿 ^_^
&O(∩_∩)O哈哈~不愧为版主！厉害厉害！谢啦！&
跟着学习啦！
同意你的观点，还得是工艺专业的高手啊！
总评分:&财富 + 1&
(784644号)
应助1 帖数612 个收听数个人主页精华0听众数分享帖子相册日志好友记录UID784644积分38魅力10 点财富2038 点主题威望1 点贡献点0 点阅读权限30注册时间在线时间486 小时活动点0 点当月幸运0 点毕业学校东北大学最后登录
海川小学3年级, 积分 38, 距离下一级还需 12 积分
帖子魅力10 点财富2038 点威望1 点贡献点0 点当月幸运0 点注册时间在线时间486 小时最后登录
平沙 发表于
1.top take off 是非常直观的说法，工艺上称之为“上抽头”。就是蒸汽管线的分支只允许从上面抽分支（上抽头 ...
O(∩_∩)O哈哈~不愧为版主！厉害厉害！谢啦！
&厉害的大牛们都在闭关修炼，我在外面看门。&
有空常来玩哦，这里我是最不厉害的了
总评分:&财富 + 3&
化工英语版
化工英语版
优秀版主勋章
优秀版主勋章
为海川作出过贡献会员 威望兑换
禁止发布任何 涉爆类、涉毒类及各类 危化品 的制造方法、保存方法或工艺信息，一经发现将直接禁号。
发布人要对本人发布的内容负全责，请理性参与学习交流
Powered by
内容发布人须承担一切因不当内容发表而导致的全部责任
有任何不妥请与管理员
联系,未经本站许可,禁止转载本站内容