CN215261310U - High-pressure high-temperature-difference pure countercurrent multi-fluid heat exchanger - Google Patents
High-pressure high-temperature-difference pure countercurrent multi-fluid heat exchanger Download PDFInfo
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- CN215261310U CN215261310U CN202120781896.7U CN202120781896U CN215261310U CN 215261310 U CN215261310 U CN 215261310U CN 202120781896 U CN202120781896 U CN 202120781896U CN 215261310 U CN215261310 U CN 215261310U
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Abstract
A high-pressure high-temperature difference pure countercurrent multi-fluid heat exchanger comprises a horizontally arranged U-shaped tube bundle, wherein the U-shaped tube bundle is arranged in a shell, a heat exchange tube in the center of the upper section of the U-shaped tube bundle is hermetically communicated with an upper inner tube box through a tube hole in the middle of an upper tube plate, the rest heat exchange tubes are hermetically communicated with an upper outer tube box through tube holes in the periphery of the upper tube plate, one end of a cold flow II outlet is communicated with the upper inner tube box, and the other end of the cold flow II outlet is hermetically extended out of the upper outer tube box; the heat exchange tube in the center of the lower section of the U-shaped tube bundle is hermetically communicated with the lower inner tube box through a tube hole in the middle of the lower tube plate, the rest heat exchange tubes are hermetically communicated with the lower outer tube box through tube holes in the periphery of the lower tube plate, one end of an inlet of the cold flow II is communicated with the lower inner tube box, and the other end of the inlet of the cold flow II extends out of the lower outer tube box in a sealing manner; the upper part of the shell close to the upper tube plate is provided with a shell pass inlet; the lower part of the shell close to the lower tube plate is provided with a shell pass outlet. The utility model discloses simple structure, compactness, area are little, can realize that cold, thermal current are high pressure and have the pure countercurrent flow heat transfer of multifluid of high difference in temperature.
Description
Technical Field
The utility model belongs to the technical field of heat exchanger, a high pressure, high difference in temperature, pure countercurrent multi-fluid heat exchanger is related to.
Background
Currently, multi-fluid heat exchangers employ heat exchangers comprising: the plate-fin heat exchanger, the wound tube heat exchanger and the shell-and-tube heat exchanger have the advantages that the heat transfer efficiency of the plate-fin heat exchanger is high, the wound tube heat exchanger is inferior, and the common shell-and-tube heat exchanger is the lowest. When the heat transfer fluid is medium or low pressure medium, the plate fin heat exchanger is preferred. When one heat transfer fluid is high-pressure and the other heat transfer fluid is medium-pressure or low-pressure, the plate-fin heat exchanger can only be used in medium-pressure or low-pressure working conditions, so that the plate-fin heat exchanger is not suitable for the working conditions; the wound tube heat exchanger can be suitable for the working conditions of low pressure in the tube pass and high pressure in the shell pass, so the wound tube heat exchanger is preferably considered. When two or more than two kinds of fluid are high-pressure media, the wound tube type heat exchanger is not suitable any more, and only the shell-and-tube type heat exchanger can be selected at the moment.
Currently, high pressure multi-fluid shell and tube heat exchangers include conventional U-tube heat exchangers and fixed tube and plate heat exchangers. When a conventional U-shaped tube type heat exchanger is adopted, the tube box partition plate of the heat exchanger adopts a flat plate structure, and the thickness of the tube box partition plate is very thick due to the high-pressure condition of a tube side medium, so that the tube box partition plate is difficult to weld and seal, even cannot be designed and processed, and when temperature difference stress loads of tubes and shell sides are superposed, the tube plate and the connection of the tube plate with the tube box and a shell are very easy to lose efficacy. When the fixed tube-plate heat exchanger structure is adopted, the equipment shell diameter is large, the efficiency is low, the investment is high, and when the temperature difference stress load of the tube side and the shell side is attached, the fixed tube-plate heat exchanger cannot be used due to the fact that the expansion joint cannot be arranged under the high-pressure working condition.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high pressure high temperature difference pure countercurrent flow body heat exchanger provides feasible solution and can realize fluidic high pressure, high difference in temperature, pure countercurrent flow heat transfer for present high pressure multi-fluid body heat exchanger.
The utility model aims at realizing through the following technical scheme:
a high-pressure high-temperature difference pure countercurrent multi-fluid heat exchanger comprises a horizontally arranged U-shaped tube bundle, wherein the U-shaped tube bundle is arranged in a shell, a heat exchange tube in the center of the upper section of the U-shaped tube bundle is communicated with an upper inner tube box in a sealing mode through a tube hole in the middle of an upper tube plate, the rest heat exchange tubes are communicated with an upper outer tube box in a sealing mode through tube holes in the periphery of the upper tube plate, one end of a cold flow II outlet is communicated with the upper inner tube box, the other end of the cold flow II outlet extends out of the upper outer tube box in a sealing mode, and a cold flow I outlet is formed in the upper portion of the upper outer tube box; the heat exchange tube in the center of the lower section of the U-shaped tube bundle is hermetically communicated with the lower inner tube box through a tube hole in the middle of the lower tube plate, the rest heat exchange tubes are hermetically communicated with the lower outer tube box through tube holes in the periphery of the lower tube plate, one end of an inlet of the cold flow II is communicated with the lower inner tube box, and the other end of the inlet of the cold flow II extends out of the lower outer tube box in a sealing manner; the lower part of the lower outer pipe box is provided with a cold flow I inlet; the upper part of the shell close to the upper tube plate is provided with a shell pass inlet; the lower part of the shell close to the lower tube plate is provided with a shell pass outlet.
And a feeding distribution plate is arranged between the lower outer tube box and the lower inner tube box.
The upper outer tube box, the upper inner tube box, the lower outer tube box and the lower inner tube box are all composed of pressure-resistant cylinders and pressure-resistant spherical shells.
The shell is a U-shaped shell formed by hermetically connecting an upper section shell, a middle section shell and a lower section shell.
The utility model discloses simple structure, compactness, area are little, can realize that cold, thermal current are high pressure and have the pure countercurrent flow heat transfer of multifluid of high difference in temperature.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of FIG. 1;
fig. 3 is a schematic cross-sectional view of the tube sheet of the present invention;
in the figure: the device comprises a cold flow II inlet 1, a lower outer tube box 2, a cold flow I inlet 3, a lower inner tube box 4, a hot flow outlet 5, a support base 6, a U-shaped tube bundle 7, a lower section shell 8, a feeding distributor 9, a lower special-shaped tube plate 10, a cold flow II outlet 11, an upper outer tube box 12, a cold flow I outlet 13, an upper inner tube box 14, an upper special-shaped tube plate 15, a hot flow inlet 16, an upper section shell 17 and a middle section shell 18.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, a high-pressure high-temperature difference pure countercurrent multi-fluid heat exchanger comprises a horizontally arranged U-shaped tube bundle, wherein the U-shaped tube bundle is arranged in a shell, a heat exchange tube in the center of the upper section of the U-shaped tube bundle 7 is hermetically communicated with an upper inner tube box 14 through a tube hole in the middle of an upper tube plate 15, the rest heat exchange tubes are hermetically communicated with an upper outer tube box 12 through tube holes in the periphery of the upper tube plate 15, one end of a cold flow II outlet 11 is communicated with the upper inner tube box 14, the other end of the cold flow II outlet extends out of the upper outer tube box 12 in a sealing manner, and a cold flow I outlet 13 is arranged at the upper part of the upper outer tube box 12; the heat exchange tube in the center of the lower section of the U-shaped tube bundle 7 is hermetically communicated with the lower inner tube box 4 through the tube hole in the middle of the lower tube plate 10, the rest heat exchange tubes are hermetically communicated with the lower outer tube box 2 through the tube holes in the periphery of the lower tube plate 10, one end of the cold flow II inlet 1 is communicated with the lower inner tube box 4, and the other end of the cold flow II inlet extends out of the lower outer tube box 2 in a sealing manner; the lower part of the lower outer tube box 2 is provided with a cold flow I inlet 3; the upper part of the shell close to the upper tube plate 15 is provided with a heat flow inlet 16; the lower part of the shell near the lower tube plate 10 is provided with a hot fluid outlet 5.
Wherein the corresponding upper tube plate annular area between the upper outer tube box 12 and the upper inner tube box 14 and the corresponding lower tube plate annular area between the lower outer tube box 2 and the lower inner tube box 4 are connected by a group of U-shaped heat exchange tubes; the upper inner tube box 14 and the lower inner tube box 4 are connected by another set of U-shaped heat exchange tubes in the circular area corresponding to the upper tube sheet and the circular area corresponding to the lower tube sheet. The cold flow II flows through the inner tube box, the cold flow I flows through the outer tube box, and the hot flow flows through the shell pass, so that the pure countercurrent heat transfer of multiple fluids is realized through the U-shaped tube bundle.
The utility model discloses in the upper and lower tube sheet that sets up, can avoid unilateral fluid to advance, export the influence of temperature difference stress, U-shaped tube bundle has also effectively absorbed the temperature difference stress of pipe, shell side fluid, makes the utility model discloses can adapt to bigger temperature difference stress.
A feeding distribution plate 9 is arranged between the lower outer tube box 2 and the lower inner tube box 4; this time outer tube case 2 and the lower annular cross-section between the inner tube case 4 are the import pipe case cross-section of cold flow I, because the influence of pipe case in this cross-section makes in cold flow I can not evenly distributed the pipe sheet heat exchange tube import cross-section, the utility model discloses set up the feeding distributing plate in this cross-section, make cold flow I distribute evenly in pipe sheet entry cross-section.
The upper outer tube box 12, the upper inner tube box 14, the lower outer tube box 2 and the lower inner tube box 4 are all composed of pressure-resistant cylinders and pressure-resistant spherical shells. The upper section shell pressure-resistant shell and the lower section shell pressure-resistant shell are respectively welded with the corresponding upper tube plate and lower tube plate; utilize the good advantage of gyration shell pressure resistance, guaranteed the utility model discloses a high pressure resistant and sealing performance.
The shell is formed by connecting an upper section shell 17, a middle section shell 18 and a lower section shell 8 in a sealing way to form a U-shaped shell. The conventional high-pressure container has two small shells instead of one large shell, and has high heat transfer efficiency, low equipment weight and low investment.
The shell is supported by a support seat 6, and the upper support seat 6 and the lower support seat 6 in the U-shaped shell groove are connected into a whole.
The utility model discloses a working process:
three fluids, namely a cold fluid I and a cold fluid II exchange heat with the hot fluid. The cold flow I enters an annular closed space formed by a lower outer tube box 2 and a lower inner tube box 4 through a cold flow I inlet 3, uniformly distributed by a feeding distributor 9, enters a group of U-shaped tube groups connected with a lower tube plate 10, and enters an annular closed space formed by an upper outer tube box 12 and an upper inner tube box 14 connected with an upper tube plate 15 after being subjected to countercurrent heat transfer with hot fluid outside the tubes through the U-shaped tube groups, and flows out from a cold flow I outlet 13; the cold flow II enters the lower inner tube box 4 through the cold flow II inlet 1, then enters another group of U-shaped tube groups connected with the lower tube plate 10, enters the upper inner tube box 14 connected with the upper tube plate 15 after being subjected to countercurrent heat transfer with hot fluid outside the tube through the U-shaped tube groups, and flows out from the cold flow II outlet 11. The hot flow flows into the upper section shell 17 from the hot flow inlet 16, is in countercurrent heat transfer with the cold flow I and the cold flow II outside the U-shaped tube bundle 7, and flows out from the hot flow outlet 5 on the lower section shell 8.
Claims (4)
1. A high pressure high temperature differential pure countercurrent multi-fluid heat exchanger comprising a horizontally disposed U-shaped tube bundle mounted in a housing, characterized in that: the heat exchange tubes in the center of the upper section of the U-shaped tube bundle (7) are hermetically communicated with an upper inner tube box (14) through tube holes in the middle of an upper tube plate (15), the rest heat exchange tubes are hermetically communicated with an upper outer tube box (12) through tube holes in the periphery of the upper tube plate (15), one end of a cold flow II outlet (11) is communicated with the upper inner tube box (14), the other end of the cold flow II outlet extends out of the upper outer tube box (12) in a sealing manner, and a cold flow I outlet (13) is arranged at the upper part of the upper outer tube box (12); the heat exchange tube in the center of the lower section of the U-shaped tube bundle (7) is hermetically communicated with the lower inner tube box (4) through a tube hole in the middle of the lower tube plate (10), the rest heat exchange tubes are hermetically communicated with the lower outer tube box (2) through tube holes in the periphery of the lower tube plate (10), one end of a cold flow II inlet (1) is communicated with the lower inner tube box (4), and the other end of the cold flow II inlet extends out of the lower outer tube box (2) in a sealing manner; the lower part of the lower outer tube box (2) is provided with a cold flow I inlet (3); a shell side inlet (16) is arranged at the upper part of the shell close to the upper tube plate (15); the lower part of the shell close to the lower tube plate (10) is provided with a shell pass outlet (5).
2. A high pressure high temperature differential pure countercurrent multi-fluid heat exchanger as defined in claim 1 wherein: and a feeding distribution plate (9) is arranged between the lower outer tube box (2) and the lower inner tube box (4).
3. A high pressure high temperature differential pure countercurrent multi-fluid heat exchanger as defined in claim 1 wherein: the upper outer tube box (12), the upper inner tube box (14), the lower outer tube box (2) and the lower inner tube box (4) are all composed of pressure-resistant cylinders and pressure-resistant spherical shells.
4. A high pressure high temperature differential pure countercurrent multi-fluid heat exchanger as defined in any one of claims 1 to 3 wherein: the shell is a U-shaped shell formed by hermetically connecting an upper section shell (17), a middle section shell (18) and a lower section shell (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120781896.7U CN215261310U (en) | 2021-04-16 | 2021-04-16 | High-pressure high-temperature-difference pure countercurrent multi-fluid heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120781896.7U CN215261310U (en) | 2021-04-16 | 2021-04-16 | High-pressure high-temperature-difference pure countercurrent multi-fluid heat exchanger |
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| CN215261310U true CN215261310U (en) | 2021-12-21 |
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| CN202120781896.7U Active CN215261310U (en) | 2021-04-16 | 2021-04-16 | High-pressure high-temperature-difference pure countercurrent multi-fluid heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145947A (en) * | 2019-06-19 | 2019-08-20 | 哈尔滨汽轮机厂辅机工程有限公司 | A kind of high temperature and pressure compressed air heat exchanger structure |
-
2021
- 2021-04-16 CN CN202120781896.7U patent/CN215261310U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145947A (en) * | 2019-06-19 | 2019-08-20 | 哈尔滨汽轮机厂辅机工程有限公司 | A kind of high temperature and pressure compressed air heat exchanger structure |
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