CN210089455U - U-shaped tube heat exchanger with novel structure - Google Patents
U-shaped tube heat exchanger with novel structure Download PDFInfo
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- CN210089455U CN210089455U CN201920988475.4U CN201920988475U CN210089455U CN 210089455 U CN210089455 U CN 210089455U CN 201920988475 U CN201920988475 U CN 201920988475U CN 210089455 U CN210089455 U CN 210089455U
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Abstract
The utility model relates to a novel U type tubular heat exchanger of structure belongs to the U type tubular heat exchanger field that special construction improved to tube sheet thermal stress. Including pipe case and casing, be equipped with the tube sheet between pipe case and the casing, set up tube side entry and tube side export on the pipe case, be equipped with interior pipe case in the tube side discrepancy cavity, interior pipe case intercommunication tube side export sets up, and pipe case in U type heat exchange tube exit end intercommunication, U type heat exchange tube entry end run through the tube sheet, and intercommunication tube side discrepancy cavity sets up. The utility model discloses balanced the tube side access & exit difference in temperature, just also reduced the difference in temperature of tube sheet, reduced the thermal stress of tube sheet, reduced the heat loss, promoted heat transfer effect, improved heat transfer area, prolonged tube sheet life, reduced the maintenance work of heat exchanger, prolonged heat exchanger life, the cost is reduced.
Description
Technical Field
The utility model relates to a novel U type tubular heat exchanger of structure belongs to the U type tubular heat exchanger field that special construction improved to tube sheet thermal stress.
Background
The heat exchanger is widely applied to various departments of production and is a typical device commonly applied in chemical industry and oil refining industry. Compared with a floating head type heat exchanger and a fixed tube plate type heat exchanger, the U-shaped tube type heat exchanger can effectively release the thermal expansion difference of a tube shell side, is widely applied to high-temperature and high-pressure occasions, and has larger tube plate thickness. From the theory of heat transfer, the thinner the tube sheet, the smaller the temperature difference across the tube sheet. However, the tube plate is also subjected to internal pressure and thermal stress on both sides of the tube plate due to temperature difference, and the tube plate cannot be thinned without limitation. Therefore, the requirements for the tube sheet are contradictory when the tube sheet is subjected to high temperature and high pressure. In order to simultaneously take account of the conditions of small temperature difference and thermal stress bearing, the U-shaped tubular pipe plate is thicker, easily causes bending stress, is easy to damage and has short service life.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel structure U type pipe heat exchanger has balanced the tube side access & exit difference in temperature, has just also reduced the difference in temperature of tube sheet, has reduced the thermal stress of tube sheet, has reduced the heat loss, has promoted heat transfer effect, has improved heat transfer area, has prolonged tube sheet life, has reduced the maintenance work of heat exchanger, has prolonged heat exchanger life, the cost is reduced.
Novel structure U type heat exchanger, including pipe case and casing, be equipped with the tube sheet between pipe case and the casing, set up tube side entry and tube side export on the pipe case, the tube side is come in and go out and is equipped with interior pipe case in the cavity, inner tube case intercommunication tube side export sets up, pipe case in U type heat exchange tube exit end intercommunication, U type heat exchange tube entry end runs through the tube sheet, communicates the tube side cavity setting of coming in and going out. The space between the tube box and the tube plate is the cavity for the tube pass to enter and exit.
Working process or working principle:
the tube side medium enters the tube box from the tube side inlet, then enters the U-shaped heat exchange tube through the U-shaped heat exchange tube inlet end, enters the inner tube box through the U-shaped heat exchange tube outlet end, and flows out through the tube side outlet.
Under the normal condition, the temperature of the inlet end of the U-shaped heat exchange tube is lower than that of the outlet end of the U-shaped heat exchange tube, a tube side medium enters the tube box and exchanges heat with the inner tube box, the temperature of the tube side medium at the outlet end of the U-shaped heat exchange tube and the temperature of the tube side medium at the inlet end of the U-shaped heat exchange tube are balanced through the inner tube box, the temperature difference between the outlet end of the U-shaped heat exchange tube and the inlet end of the U-shaped heat exchange tube on the tube plate is reduced, the thermal.
The inner tube box comprises a shell ring, a left end cover and a right end cover are arranged at two ends of the shell ring respectively, a balance port is arranged at the top end of the shell ring and communicated with a tube pass outlet, and the outlet end of the U-shaped heat exchange tube penetrates through the right end cover and is communicated with the inner tube box.
The outlet end of the U-shaped heat exchange tube is communicated with a sleeve, and the sleeve penetrates through the right end cover. The structure of the U-shaped heat exchange tube is not required to be changed, the universal U-shaped heat exchange tube is still used, the structure is simple, and the installation is convenient.
The outlet end of the U-shaped heat exchange tube is sealed with the sleeve through a gasket.
The outlet ends of the U-shaped heat exchange tubes and the inlet ends of the U-shaped heat exchange tubes are arranged in a staggered mode. The U-shaped heat exchange tubes on the tube plate are distributed in a staggered mode, so that the temperature difference between the outlet end of each U-shaped heat exchange tube and the inlet end of each U-shaped heat exchange tube can be better balanced, the temperature difference of the tube plate is reduced as far as possible, and the thermal stress of the tube plate is reduced.
The U-shaped heat exchange tubes are arranged side by side along the horizontal direction to form a U-shaped heat exchange tube group; the U-shaped heat exchange tube group is sleeved with the heat exchange tube group from outside to inside along the vertical direction, the outlet ends of the adjacent U-shaped heat exchange tubes and the inlet ends of the U-shaped heat exchange tubes are arranged in a staggered mode.
And U-shaped heat exchange tubes are sleeved in the middle of the heat exchange tube group from outside to inside along the horizontal direction.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a pipe case in setting up, the tube side medium carries out the heat exchange in advance in pipe case and inner tube case, has reduced the tube sheet difference in temperature, has reduced pipe case temperature, has reduced tube sheet thermal stress, has reduced pipe case thermal stress, and tube sheet temperature distribution tends to evenly. The tube box partition plate is omitted, the inner tube box for balancing the temperature difference between the tube pass inlet and the tube pass outlet is arranged, the metal temperature of the tube box is reduced, the thermal stress of a thick tube plate is reduced, the thickness of the tube plate is reduced, the heat transfer effect is improved, the tube arrangement is increased, the heat exchange area is improved, the structure is simple, the use is convenient, the efficiency is high, the reliability is high, and the cost is low. The important problem of the increase of the thermal stress of the tube plate of the U-shaped tube heat exchanger is solved.
2. Through setting up adjacent U type heat exchange tube, U type heat exchange tube entry end and U type heat exchange tube exit end staggered arrangement change U type pipe circulation mode, make low temperature medium and tub contact of case, high temperature medium can reduce tub case metal temperature in the case of the case, alleviates tube sheet thermal stress, reduces the decline of material mechanical properties, plays very important effect to the safe operation of guaranteeing the heat exchanger, material saving, reduce cost.
3. Adopt inner tube case structure to replace traditional baffle structure, cancelled the baffle groove, increased stringing quantity, increase heat transfer area, promoted efficiency, simple structure, convenient to use, it is high-efficient reliable, low cost is energy-conserving heat exchanger.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the tube sheet layout of the present invention;
FIG. 3 is a schematic view of the connection structure of the heat exchange tube and the inner tube box of the present invention;
in the figure, 1, a tube box; 2. an inner tube box; 3. a tube side outlet; 4. a tube side inlet; 5. a sleeve; 6. a gasket; 7. a tube sheet; 8. the outlet end of the U-shaped heat exchange tube; 9. an inlet end of the U-shaped heat exchange tube; 10. a housing; 11. a shell-side inlet; 12. a shell-side outlet; 13. a U-shaped heat exchange tube;
2.1, a balance port; 2.2, a cylindrical section; 2.3, a right end cover; 2.4, left end cap.
The arrows in fig. 1 indicate the direction of the medium flow.
In FIG. 2, A represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, B shows a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, C shows a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, D shows a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, E represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, F represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, A' represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, B' represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, C' represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, D' represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, E' represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, F' represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, F' represents a whole row of U-shaped heat exchange tubes in the horizontal direction;
in FIG. 2, G represents the outlet end of the U-shaped heat exchange tube of the outermost U-shaped heat exchange tube, and G' represents the inlet end of the U-shaped heat exchange tube of the outermost U-shaped heat exchange tube;
in FIG. 2, H represents the outlet end of the U-shaped heat exchange tube of the second U-shaped heat exchange tube from the outside to the inside, and H' represents the inlet end of the U-shaped heat exchange tube of the second U-shaped heat exchange tube from the outside to the inside;
in FIG. 2, I represents the outlet end of the U-shaped heat exchange tube of the third U-shaped heat exchange tube from outside to inside, and I' represents the inlet end of the U-shaped heat exchange tube of the third U-shaped heat exchange tube from outside to inside;
in FIG. 2, J represents the outlet end of the U-shaped heat exchange tube of the fourth U-shaped heat exchange tube from the outside to the inside, and J' represents the inlet end of the U-shaped heat exchange tube of the fourth U-shaped heat exchange tube from the outside to the inside;
in FIG. 2, K represents the outlet end of the U-shaped heat exchange tube of the fifth U-shaped heat exchange tube from outside to inside, and K' represents the inlet end of the U-shaped heat exchange tube of the fifth U-shaped heat exchange tube from outside to inside;
in fig. 2, L denotes the U-shaped heat exchange tube outlet end of the innermost U-shaped heat exchange tube, and L' denotes the U-shaped heat exchange tube inlet end of the innermost U-shaped heat exchange tube.
Detailed Description
The technical solution in the embodiments of the present invention will be further clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention:
example 1
As shown in fig. 1-3, novel structure U type tubular heat exchanger, including pipe case 1 and casing 10, be equipped with tube sheet 7 between pipe case 1 and the casing 10, set up tube side entry 4 and tube side export 3 on the pipe case 1, the tube side is come in and goes out and is equipped with interior pipe case 2 in the cavity, the cavity between pipe case 1 and the tube sheet 7, be the tube side cavity of coming in and going out promptly, interior pipe case 2 is used for balanced tube side access & exit difference in temperature, interior pipe case 2 communicates tube side export 3 setting, 8 intercommunication interior pipe cases 2 of U type heat exchange tube exit end, U type heat exchange tube entry end 9 runs through tube sheet 7, intercommunication tube side cavity settings of coming in and going out. Interior pipe case 2 includes shell ring 2.2, and shell ring 2.2 both ends are equipped with left end lid 2.4 and right-hand member lid 2.3 respectively, and shell ring 2.2 top is equipped with balanced mouthful 2.1, and balanced mouthful 2.1 intercommunication tube side export 3, and U type heat exchange tube exit end 8 can run through right-hand member lid 2.3, and the setting of pipe case 2 in the intercommunication. The outlet end 8 of the U-shaped heat exchange tube can also be communicated with a sleeve 5, and the sleeve 5 penetrates through the right end cover. The left end cover and the right end cover are only convenient to describe with reference to the attached drawings, and have no limitation on left and right arrangement in the technology. The outlet end 8 of the U-shaped heat exchange tube is sealed with the sleeve 5 through a gasket 6. As shown in fig. 1, the inner pipe box 2 is welded and fixed with the pipe orifice of the pipe pass outlet; as shown in fig. 3, the U-shaped heat exchange tube is welded with the tube plate; the outlet end 9 of the U-shaped heat exchange tube, the gasket 6 and the sleeve 5 are connected, and the right end cover is welded with the sleeve 5.
The outlet end 8 and the inlet end 9 of the U-shaped heat exchange tube are arranged in a staggered mode.
Arranging U-shaped heat exchange tubes side by side along the horizontal direction to form a U-shaped heat exchange tube group; the U-shaped heat exchange tube group is sleeved with the heat exchange tube group from outside to inside along the vertical direction, and the outlet end 8 and the inlet end 9 of the U-shaped heat exchange tube are arranged in a staggered mode adjacent to the U-shaped heat exchange tube 13 and the U-shaped heat exchange tube. In the middle of the heat exchange tube set, a U-shaped heat exchange tube 13 is sleeved from outside to inside along the horizontal direction. The horizontal direction and the vertical direction are only for convenience of description, and are not used for limiting the technical scheme per se nor the installation direction. As shown in fig. 2, a U-shaped heat exchange tube inlet end 9 and a U-shaped heat exchange tube outlet end 8. The inlet ends of the U-shaped heat exchange tubes in the row A are arranged corresponding to the outlet ends of the U-shaped heat exchange tubes in the row A', and one group of the inlet ends of the U-shaped heat exchange tubes in the row A and the outlet ends of the U-shaped heat exchange tubes in the row A on the same vertical line are the same U-shaped heat exchange tube; the row A and the row A 'represent a group of heat exchange tube sets, which can be represented as an A-A' heat exchange tube set;
the inlet ends of the U-shaped heat exchange tubes in the row B are arranged corresponding to the outlet ends of the U-shaped heat exchange tubes in the row B', and one group of the inlet ends of the U-shaped heat exchange tubes in the row B and the outlet ends of the U-shaped heat exchange tubes in the row B on the same vertical line are the same U-shaped heat exchange tube; the row B and the row B 'represent a group of heat exchange tube sets, which can be represented as a B-B' heat exchange tube set;
and so on until the F row corresponds to the F' row.
The heat exchange tube group A-A 'is located on the outermost side, the heat exchange tube group B-B' is sleeved in the heat exchange tube group A-A ', the heat exchange tube group C-C' is sleeved in the heat exchange tube group B-B ', the heat exchange tube group D-D', the heat exchange tube group E-E ', and the heat exchange tube group F-F' are sequentially sleeved. The adjacent heat exchange tube groups are arranged in a staggered manner.
The U-shaped heat exchange tubes are horizontally arranged in the middle, G and G 'are the same U-shaped heat exchange tube, G is the outlet end of the U-shaped heat exchange tube, and G' is the inlet end of the U-shaped heat exchange tube; similarly, the U-shaped heat exchange tube outlet end H of the second U-shaped heat exchange tube counted from outside to inside and the U-shaped heat exchange tube inlet end H' of the second U-shaped heat exchange tube counted from outside to inside are the same U-shaped heat exchange tube. The U-shaped heat exchange tube outlet end I of the third U-shaped heat exchange tube counted from outside to inside and the U-shaped heat exchange tube inlet end I' of the third U-shaped heat exchange tube counted from outside to inside are the same U-shaped heat exchange tube. The U-shaped heat exchange tube outlet end of the fourth U-shaped heat exchange tube counted from outside to inside and the U-shaped heat exchange tube inlet end J' of the fourth U-shaped heat exchange tube counted from outside to inside are the same U-shaped heat exchange tube. K the U-shaped heat exchange tube outlet end of the fifth U-shaped heat exchange tube counted from outside to inside and the U-shaped heat exchange tube inlet end K' of the fifth U-shaped heat exchange tube counted from outside to inside are the same U-shaped heat exchange tube. The U-shaped heat exchange tube outlet end L of the innermost U-shaped heat exchange tube and the U-shaped heat exchange tube inlet end L' of the innermost U-shaped heat exchange tube are the same U-shaped heat exchange tube and are all horizontally arranged.
G and G 'are the same U-shaped heat exchange tube and are indicated as G-G' U-shaped heat exchange tubes, H and H 'are the same U-shaped heat exchange tube and are indicated as H-H' U-shaped heat exchange tubes, and the rest is done in sequence; the G-G ' U-shaped heat exchange tube is positioned on the outermost side, the H-H ' U-shaped heat exchange tube is sleeved in the G-G ' U-shaped heat exchange tube, and the I-I ' U-shaped heat exchange tube, the J-J ' U-shaped heat exchange tube, the K-K ' U-shaped heat exchange tube and the L-L ' U-shaped heat exchange tube are sequentially sleeved.
The inlet ends of the U-shaped heat exchange tubes and the outlet ends of the U-shaped heat exchange tubes are distributed in a staggered mode, so that the temperature distribution of the tube plates tends to be uniform, and the temperature difference and the thermal stress of the tube plates are effectively reduced.
The U-shaped heat exchange tube is also called a U-shaped tube.
Working process or working principle:
when the novel-structure U-shaped tube heat exchanger is used, no partition plate is arranged in a tube side, a tube side medium enters the tube box through a tube side inlet, enters the U-shaped heat exchange tube through the U-shaped heat exchange tube inlet end 9, enters the inner tube box through the U-shaped heat exchange tube outlet end 8, and finally flows out through a tube side outlet. The shell side medium enters from the shell side inlet 11 and flows out from the shell side outlet 12, and completes heat exchange with the heat exchange tubes in the shell.
In general, the temperature of a tube side medium of the U-shaped tube heat exchanger is lower than the temperature of an outlet, a low-temperature medium is firstly contacted with the tube box, enters the U-shaped heat exchange tube through the inlet end of the U-shaped heat exchange tube, enters the inner tube box from the outlet end of the U-shaped heat exchange tube and reaches the tube side outlet through a balance port of the inner tube box, the metal temperature of the tube box can be reduced, the thermal stress of a tube plate is reduced, and the reduction of the mechanical.
The utility model discloses in to the direction of structure and the description of relative position relation, it is right not to constitute like the description from top to bottom all around the utility model discloses a restriction only is the description convenient.
Claims (7)
1. The utility model provides a novel structure U type heat exchanger, a serial communication port, including pipe case (1) and casing (10), be equipped with tube sheet (7) between pipe case (1) and casing (10), set up tube side entry (4) and tube side export (3) on pipe case (1), tube side discrepancy intracavity is equipped with interior pipe case (2), interior pipe case (2) intercommunication tube side export (3) set up, pipe case (2) in U type heat exchange tube exit end (8) intercommunication, tube sheet (7) are run through in U type heat exchange tube entry end (9), intercommunication tube side discrepancy cavity setting.
2. The novel-structure U-shaped tube heat exchanger as claimed in claim 1, wherein the inner tube box (2) comprises a tube section (2.2), a left end cover (2.4) and a right end cover (2.3) are respectively arranged at two ends of the tube section (2.2), a balance port (2.1) is arranged at the top end of the tube section (2.2), the balance port (2.1) is communicated with the tube pass outlet (3), and an outlet end (8) of the U-shaped heat exchange tube penetrates through the right end cover (2.3) and is communicated with the inner tube box (2).
3. The new-structure U-shaped tube heat exchanger as claimed in claim 2, characterized in that the outlet end (8) of the U-shaped heat exchange tube is communicated with a sleeve (5), and the sleeve (5) is arranged through the right end cover.
4. The new structure U-shaped tube heat exchanger according to claim 1, characterized in that the U-shaped heat exchange tube outlet end (8) is sealed with the sleeve (5) by a gasket (6).
5. The new structure U-shaped tube heat exchanger according to any one of claims 1 to 4, characterized in that the outlet ends (8) and the inlet ends (9) of the U-shaped heat exchange tubes are arranged alternately adjacent to each other in the U-shaped heat exchange tubes (13).
6. The new structure U-shaped tube heat exchanger according to claim 5, characterized in that U-shaped heat exchange tubes (13) are arranged side by side along the horizontal direction to form a U-shaped heat exchange tube group; the U-shaped heat exchange tube group is sleeved with the heat exchange tube group from outside to inside along the vertical direction, the outlet end (8) and the inlet end (9) of the U-shaped heat exchange tube are arranged in a staggered mode, and the adjacent U-shaped heat exchange tubes (13) are arranged in a staggered mode.
7. The new structure U-shaped tube heat exchanger as claimed in claim 6, characterized in that the U-shaped heat exchange tube (13) is sleeved from outside to inside along the horizontal direction in the middle of the heat exchange tube group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920988475.4U CN210089455U (en) | 2019-06-25 | 2019-06-25 | U-shaped tube heat exchanger with novel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920988475.4U CN210089455U (en) | 2019-06-25 | 2019-06-25 | U-shaped tube heat exchanger with novel structure |
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| Publication Number | Publication Date |
|---|---|
| CN210089455U true CN210089455U (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920988475.4U Active CN210089455U (en) | 2019-06-25 | 2019-06-25 | U-shaped tube heat exchanger with novel structure |
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| CN (1) | CN210089455U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944956A (en) * | 2021-02-22 | 2021-06-11 | 哈尔滨锅炉厂有限责任公司 | U-shaped tubular heat exchanger with high-temperature and high-pressure tube pass structure |
| CN113566611A (en) * | 2021-08-12 | 2021-10-29 | 上海蓝滨石化设备有限责任公司 | U-shaped pipe three-flow heat exchanger |
-
2019
- 2019-06-25 CN CN201920988475.4U patent/CN210089455U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944956A (en) * | 2021-02-22 | 2021-06-11 | 哈尔滨锅炉厂有限责任公司 | U-shaped tubular heat exchanger with high-temperature and high-pressure tube pass structure |
| CN113566611A (en) * | 2021-08-12 | 2021-10-29 | 上海蓝滨石化设备有限责任公司 | U-shaped pipe three-flow heat exchanger |
| CN113566611B (en) * | 2021-08-12 | 2023-12-19 | 上海蓝滨石化设备有限责任公司 | U-shaped tube three-flow heat exchanger |
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