CN210400080U - Winding pipe type combined heat exchanger for dual-fuel power ship - Google Patents
Winding pipe type combined heat exchanger for dual-fuel power ship Download PDFInfo
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- CN210400080U CN210400080U CN201921327794.7U CN201921327794U CN210400080U CN 210400080 U CN210400080 U CN 210400080U CN 201921327794 U CN201921327794 U CN 201921327794U CN 210400080 U CN210400080 U CN 210400080U
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Abstract
The utility model discloses a dual fuel power marine winding tubular combination heat exchanger, which comprises a housin, the both ends of casing are respectively through bolt fastening have upper tube case and lower tube case, and the integrative welding of outer wall of upper tube case has natural boil-off gas export, main fuel export and from the pressure boost fuel export, and the main fuel export is located the natural boil-off gas export and from between the pressure boost fuel export, the integrative welding of outer wall of lower tube case has from pressure boost fuel import, main fuel import and natural boil-off gas import, and the main fuel import is located between self-boost fuel import and the natural boil-off gas import, upper tube board and lower tube board have been welded respectively with the junction of casing to the upper tube case and lower tube case, and the core drum passes through minor diameter drum section and upper tube board and lower tube board welded fastening, and heat exchange tube bank winding is on the core drum, and the division is separated with the. The utility model discloses a winding tubular combination heat exchanger collects three heat exchangers in an organic whole, reduces the bearing structure between the gas is handled, saves space, the limited occasion of spatial position on the specially adapted boats and ships.
Description
Technical Field
The utility model relates to a heat exchanger technical field especially relates to a marine winding tubular combination heat exchanger of dual fuel power.
Background
On a dual-fuel power ship, LNG in a fuel tank is generally evaporated into low-temperature natural gas through a main gasifier, and the low-temperature natural gas is heated to normal temperature through a fuel gas superheater and is used as fuel of a dual-fuel engine. The fuel tank is subjected to external heat transfer, so that part of the low-temperature LNG is evaporated, and the vapor becomes natural boil-off gas. For the LNG transport ship, the excessive natural boil-off gas can be heated to normal temperature through a fuel gas heater and used as fuel of a dual-fuel engine. When the pressure in the fuel cabin is low due to LNG consumption, a self-pressurization gasifier can be arranged for maintaining stable pressure, and LNG supplies low-temperature natural gas after passing through the self-pressurization gasifier and returns to the top of the fuel cabin to pressurize the fuel cabin.
The above gas treatment system is generally configured with 3 to 4 heat exchangers, i.e., a main gasification and heating integrated heat exchanger (or a main gasifier and a gas superheater), a natural boil-off gas heater, and a self-pressurization gasifier. The heat exchanger in the traditional configuration is usually a common shell and tube heat exchanger, the heat transfer area is small, and the space occupied by a fuel gas treatment room is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a dual-fuel power marine winding pipe type combined heat exchanger.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a winding pipe type combined heat exchanger for a dual-fuel power ship comprises a shell, an upper pipe box and a lower pipe box are respectively fixed at two ends of the shell through bolts, and the outer wall of the upper tube box is welded with a natural evaporated gas outlet, a main fuel outlet and a self-pressurizing fuel outlet, the main fuel outlet is positioned between the natural evaporated gas outlet and the self-pressurizing fuel outlet, the outer wall of the lower channel box is integrally welded with a self-pressurizing fuel inlet, a main fuel inlet and a natural evaporation gas inlet, and the main fuel inlet is positioned between the self-pressurized fuel inlet and the natural evaporation gas inlet, the joints of the upper tube box and the lower tube box with the shell are respectively welded with an upper tube plate and a lower tube plate, heat exchange tube bundles are annularly distributed between the shell and the core cylinder, the heat exchange tube bundles are wound on the core cylinder, the wound tubes are separated by spacer bars, and a heating medium inlet and a heating medium outlet are respectively welded on the outer wall of the same side of the joint of the upper tube plate and the lower tube plate with the two ends of the shell.
Preferably, the joints of the upper tube plate and the lower tube plate with the two ends of the shell are divided into an inner ring tube distribution area, a middle ring tube distribution area and an outer ring tube distribution area, the inner ring tube distribution area is provided with winding tubes from 1 st to i th layers, the middle ring tube distribution area is provided with winding tubes from (i +1) th to j th layers, and the outer ring tube distribution area is provided with winding tubes from (j +1) th to k th layers.
Preferably, the diameter of the outermost edge of the pipe distribution in the inner-ring pipe distribution area is smaller than that of the innermost edge of the pipe distribution in the middle-ring pipe distribution area, the diameter of the outermost edge of the pipe distribution in the middle-ring pipe distribution area is smaller than that of the innermost edge of the pipe distribution in the outer-ring pipe distribution area, and the heat exchange pipes in the inner-ring pipe distribution area, the middle-ring pipe distribution area and the outer-ring pipe distribution area are communicated with the heat exchange pipe bundle through spiral sections.
Preferably, the inner heat exchange tube bundle of the shell is divided into k layers of winding tubes, and the 1 st to i layers of winding tubes are distributed between the main fuel outlet and the main fuel inlet to connect the tube section, the (i +1) th to j layers of winding tubes are distributed between the natural boil-off gas outlet and the natural boil-off gas inlet to connect the tube section, and the (j +1) th to k layers of winding tubes are distributed between the self-pressurizing fuel outlet and the self-pressurizing fuel inlet to connect the tube section.
Preferably, transition parts are arranged between the inner ring cloth pipe area, the middle ring cloth pipe area, the outer ring cloth pipe area and the inner heat exchange pipe bundle winding section, and the axis transition radius of the transition parts is not less than 10 times of the radius of the single winding pipe in the heat exchange pipe bundle.
Preferably, the heating medium is uniformly filled in the shell and is water glycol.
The utility model has the advantages that:
1. the pipe bundle of the dual-fuel power marine winding pipe type combined heat exchanger is coiled by the winding pipe, the space utilization rate is high, and the heat transfer coefficient is higher compared with that of a straight pipe. Meanwhile, the winding pipe has a compact structure and certain temperature compensation capability;
2. the number and the winding angle of each layer of the tube bundle in the dual-fuel power marine wound tube type combined heat exchanger can be designed to meet the design requirement on the flow and the heat exchange area of heat exchange;
3. the pipe arrangement of the pipe plate of the double-fuel power marine winding pipe type combined heat exchanger is convenient for winding the winding pipe, the transition from the winding section to the straight pipe section is smooth and natural, and the heat transfer pipe is prevented from generating large internal stress; in conclusion, the winding pipe type combined heat exchanger for the dual-fuel power ship integrates three heat exchangers, reduces a supporting structure of a gas treatment room, saves space, and is particularly suitable for occasions with limited space positions on ships.
Drawings
Fig. 1 is a schematic view of the overall structure of a dual-fuel power marine winding pipe type combined heat exchanger provided by the present invention;
fig. 2 is a schematic view of a cross-sectional structure a-a of the dual-fuel power marine winding tube type combined heat exchanger provided by the present invention;
fig. 3 is a layered diagram of the heat exchange tube bundle winding section of the dual-fuel power marine winding tube type combined heat exchanger provided by the utility model.
In the figure: the device comprises a natural evaporation gas outlet 1, a main fuel outlet 2, a self-pressurization fuel outlet 3, an upper tube box 4, an upper tube plate 5, a heating medium inlet 6, a shell 7, a heat exchange tube bundle 8, a 9-core cylinder, a heating medium outlet 10, a lower tube plate 11, a lower tube box 12, a self-pressurization fuel inlet 13, a main fuel inlet 14, a natural evaporation gas inlet 15 and a partition strip 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-3, a dual-fuel power marine winding tube type combined heat exchanger comprises a shell 7, an upper tube box 4 and a lower tube box 12 are respectively fixed at two ends of the shell 7 through bolts, a natural evaporation gas outlet 1, a main fuel outlet 2 and a self-pressurization fuel outlet 3 are integrally welded on the outer wall of the upper tube box 4, the main fuel outlet 2 is positioned between the natural evaporation gas outlet 1 and the self-pressurization fuel outlet 3, a self-pressurization fuel inlet 13, a main fuel inlet 14 and a natural evaporation gas inlet 15 are integrally welded on the outer wall of the lower tube box 12, the main fuel inlet 14 is positioned between the self-pressurization fuel inlet 13 and the natural evaporation gas inlet 15, an upper tube plate 5 and a lower tube plate 11 are respectively welded at the joint of the upper tube box 4 and the lower tube box 12 and the shell 7, a core cylinder 9 is welded and fixed with the upper tube plate 5 and the lower tube plate 11 through a small-diameter cylinder section, and a heat exchange tube bundle 8 is, the adjacent heat exchange winding pipe layers adopt spacers 16 to ensure the layer gap, the outer wall of the same side of the connecting part of the two ends of the upper pipe plate 5 and the lower pipe plate 11 and the shell 7 is respectively welded with a heating medium inlet 6 and a heating medium outlet 10, the connecting part of the two ends of the upper pipe plate 5 and the lower pipe plate 11 and the shell 7 is divided into an inner ring pipe distribution area, a middle ring pipe distribution area and an outer ring pipe distribution area, the inner ring pipe distribution area is provided with winding pipes from 1 to i layers, the middle ring pipe distribution area is provided with winding pipes from (i +1) to j layers, the outer ring pipe distribution area is provided with winding pipes from (j +1) to k layers, the outermost edge diameter of the pipe distribution in the inner ring pipe distribution area is smaller than the innermost edge diameter of the pipe distribution in the middle ring pipe distribution area, the outermost edge diameter of the pipe distribution in the middle ring pipe distribution area is smaller than the innermost edge diameter of the pipe distribution in the outer ring pipe distribution area, the heat exchange pipes in the inner ring pipe distribution area, the middle ring pipe distribution, the inner heat exchange tube bundle 8 of the shell 7 is divided into k layers of winding tubes, wherein the 1 st to i layers of winding tubes are distributed between the main fuel outlet 2 and the main fuel inlet 14 to form a connecting tube section, the (i +1) th to j layers of winding tubes are distributed between the natural evaporation gas outlet 1 and the natural evaporation gas inlet 15 to form a connecting tube section, the (j +1) th to k layers of winding tubes are distributed between the self-pressurization fuel outlet 3 and the self-pressurization fuel inlet 13 to form a connecting tube section, a transition part is arranged between the inner ring tube distribution area, the middle ring tube distribution area and the outer ring tube distribution area and the inner heat exchange tube bundle 8, the axis transition radius of the transition part is not less than 10 times of the monomer radius of the winding tubes in the heat exchange tube bundle 8, the shell 7 is uniformly filled with heating media, and the heating media are water glycol.
The working principle is as follows: the heating medium enters the shell 7 through the pipe 6, reaches the winding section of the heat exchange pipe to heat the heat exchange pipe, and is discharged through the pipe 10. LNG liquid in the fuel tank enters the outer ring pipe area from the pressurizing pipeline through the pressurizing pipeline 13 to the (j +1) th to k-th winding pipes, is heated and gasified, and gasified NG gas flows out through the pressurizing pipeline 3 and returns to the top of the fuel tank. When the pressure inside the fuel tank rises to a pressure slightly higher than the gas pressure demanded by the engine, the automatic control valve on the pressurization line will be closed. When the engine needs to use fuel gas, the automatic control valve of the main fuel gas pipeline is opened, LNG liquid enters the middle ring pipe area to the 1 st to i-th layer winding pipes through the 14 th layer winding pipes, is heated and gasified and then is overheated, and the temperature reaching the engine requirement flows out from the 2 nd layer winding pipes. For the LNG transport ship, when excessive natural boil-off gas is generated in the fuel tank, the natural evaporator enters the tube pass area b to the (i +1) th to j-th layers of winding tubes through the tube pass area 15, and is heated to the temperature required by the engine and flows out of the tube pass area 1.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A double-fuel power marine winding pipe type combined heat exchanger comprises a shell (7) and is characterized in that an upper pipe box (4) and a lower pipe box (12) are respectively fixed at two ends of the shell (7) through bolts, a natural evaporation gas outlet (1), a main fuel outlet (2) and a self-pressurization fuel outlet (3) are integrally welded on the outer wall of the upper pipe box (4), the main fuel outlet (2) is located between the natural evaporation gas outlet (1) and the self-pressurization fuel outlet (3), a self-pressurization fuel inlet (13), a main fuel inlet (14) and a natural evaporation gas inlet (15) are integrally welded on the outer wall of the lower pipe box (12), the main fuel inlet (14) is located between the self-pressurization fuel inlet (13) and the natural evaporation gas inlet (15), an upper pipe plate (5) and a lower pipe plate (11) are respectively welded at the joint of the upper pipe box (4) and the lower pipe box (12) with the shell (7), core drum (9) are fixed with upper tube plate (5) and lower tube plate (11) welded through minor diameter cylinder section, annular distribution has heat exchanger tube bank (8) between casing (7) and core drum (9), and heat exchanger tube bank (8) winding is on core drum (9), and the winding pipe is separated with parting bead (16), it has heating medium import (6) and heating medium export (10) to weld respectively with one side outer wall of the both ends junction of upper tube plate (5) and lower tube plate (11) and casing (7).
2. The dual-fuel power marine winding pipe type combined heat exchanger as recited in claim 1, wherein the connection between the upper pipe plate (5) and the lower pipe plate (11) and the two ends of the shell (7) is divided into three areas, namely an inner ring pipe distribution area, a middle ring pipe distribution area and an outer ring pipe distribution area, the inner ring pipe distribution area is provided with winding pipes on the 1 st to i th layers, the middle ring pipe distribution area is provided with winding pipes on the (i +1) th to j th layers, and the outer ring pipe distribution area is provided with winding pipes on the (j +1) th to k th layers.
3. The twinned tube type combined heat exchanger for the dual-fuel power ship as claimed in claim 2, wherein the diameter of the outermost edges of the tubes in the inner ring tube distribution area is smaller than the diameter of the innermost edges of the tubes in the middle ring tube distribution area, the diameter of the outermost edges of the tubes in the middle ring tube distribution area is smaller than the diameter of the innermost edges of the tubes in the outer ring tube distribution area, and the heat exchange tube bundles (8) in the inner ring tube distribution area, the middle ring tube distribution area and the outer ring tube distribution area are communicated with each other through the straight tube sections and the spiral sections.
4. The dual-fuel power marine wound tube type combined heat exchanger according to claim 1, wherein the heat exchange tube bundle (8) in the shell (7) is divided into k layers of wound tubes, and wherein the 1 st to i layers of wound tubes are distributed between the main fuel outlet (2) and the main fuel inlet (14) to connect the tube sections, the (i +1) th to j layers of wound tubes are distributed between the natural boil-off gas outlet (1) and the natural boil-off gas inlet (15) to connect the tube sections, and the (j +1) th to k layers of wound tubes are distributed between the self-pressurizing fuel outlet (3) and the self-pressurizing fuel inlet (13) to connect the tube sections.
5. The dual-fuel power marine wound tube type combined heat exchanger as claimed in claim 2, wherein transition portions are arranged between the inner ring tube distribution area, the middle ring tube distribution area and the outer ring tube distribution area and the wound sections of the inner heat exchange tube bundle (8), and the axial transition radius of the transition portions is not less than 10 times of the single radius of the wound tubes in the heat exchange tube bundle (8).
6. The dual-fuel power marine coiled pipe combined heat exchanger as claimed in claim 1, characterized in that the heating medium is uniformly filled in the shell (7) and is water glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921327794.7U CN210400080U (en) | 2019-08-16 | 2019-08-16 | Winding pipe type combined heat exchanger for dual-fuel power ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921327794.7U CN210400080U (en) | 2019-08-16 | 2019-08-16 | Winding pipe type combined heat exchanger for dual-fuel power ship |
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| Publication Number | Publication Date |
|---|---|
| CN210400080U true CN210400080U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921327794.7U Active CN210400080U (en) | 2019-08-16 | 2019-08-16 | Winding pipe type combined heat exchanger for dual-fuel power ship |
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| Country | Link |
|---|---|
| CN (1) | CN210400080U (en) |
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- 2019-08-16 CN CN201921327794.7U patent/CN210400080U/en active Active
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Effective date of registration: 20200824 Address after: Room 3-702, garden square, Nanhu District, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Power Co., Ltd Address before: 200120 Shanghai City, Pudong New Area Wanxiang town Hongxiang road 83 Lane No. 1-42 building 20 room 118 Patentee before: Shanghai fantuo Power Co.,Ltd. |