CN113959236A - Annular steam condenser suitable for deep sea high pressure and working method thereof - Google Patents
Annular steam condenser suitable for deep sea high pressure and working method thereof Download PDFInfo
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- CN113959236A CN113959236A CN202111394389.9A CN202111394389A CN113959236A CN 113959236 A CN113959236 A CN 113959236A CN 202111394389 A CN202111394389 A CN 202111394389A CN 113959236 A CN113959236 A CN 113959236A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000013535 sea water Substances 0.000 claims abstract description 184
- 239000010410 layer Substances 0.000 claims description 49
- 238000009826 distribution Methods 0.000 claims description 39
- 239000012530 fluid Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000005219 brazing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/086—Heat exchange elements made from metals or metal alloys from titanium or titanium alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses an annular steam condenser suitable for deep sea high pressure, which comprises an annular plate bundle body, a steam side annular fin plate bundle and a seawater side annular fin plate bundle, wherein the steam side annular fin plate bundle and the seawater side annular fin plate bundle are stacked layer by layer to form a whole body and are arranged in the annular plate bundle body, one end face of the annular plate bundle body is provided with a steam inlet and a seawater inlet, the other end face of the annular plate bundle body is provided with a seawater outlet and a steam condensate outlet, the steam inlet and the seawater inlet as well as the seawater outlet and the steam condensate outlet are respectively arranged relative to the central axis of the annular plate bundle body, and the steam inlet, the seawater outlet and the steam condensate outlet are all communicated with the inside of the annular plate bundle body, and the working method is provided. The invention can be adapted to the high-pressure environment in deep sea, has high heat transfer efficiency, compact structure and reliable pressure resistance, and is particularly suitable for the deep sea equipment platform with limited space and strict requirements on space arrangement and connecting pipe positions.
Description
Technical Field
The invention relates to a condenser, in particular to an annular steam condenser suitable for deep sea high pressure and a working method thereof.
Background
At present, plate-fin condensers are classified into low-pressure (0.1Mpa to 1.6Mpa), medium-pressure (1.6Mpa to 10.0Mpa) and high-pressure (10.0Mpa to 100.0Mpa) condensers according to design pressure. The pressure-bearing capacity of the plate-fin condenser depends on the fin material, type, specification and brazing process. The existing fin types comprise zigzag, straight and porous shapes, etc. The traditional plate-fin condenser mainly comprises stainless steel, aluminum alloy, titanium alloy and the like.
At present, a medium-pressure and high-pressure plate-fin condenser is an important part of large-scale and extra-large-scale air separation equipment, and is also important equipment for realizing cooling of a main machine, such as a deep sea submersible vehicle, a deep sea space station and the like. For example, in a steam-powered submarine, a high-pressure condenser with compact structure, high pressure resistance, corrosion resistance and easy liquid drainage is needed to realize heat exchange between steam and deep sea water. In a deep sea equipment platform, due to the limitations of space, pressure resistance, pipeline arrangement and the like, the condenser with a cubic structure cannot be adopted on a land base, and the condenser needs to be designed and arranged into an inner hollow annular structure. Therefore, a condenser with stronger adaptability is urgently needed for the requirements of compact heat exchange space, fixed positions of inlet and outlet fluid connecting pipes, large pressure stress between plate bundles due to large flow pressure difference, serious seawater electrochemical corrosion and the like, and the requirements of a steam side for draining liquid in time to prevent pressure build-up, controlling the fluid speed and disturbance so as to avoid an excessively large noise, such as a deep sea high-pressure environment.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above problems, an object of the present invention is to provide an annular steam condenser suitable for deep sea high pressure, which provides a reliable and stable condenser in the deep sea high pressure field, and which not only meets the existing requirements, but also is lighter and more efficient. And provides a working method thereof.
The technical scheme is as follows: the utility model provides an annular steam condenser suitable for deep sea high pressure, including annular plate bunch body, steam side annular fin plate bunch, sea water side annular fin plate bunch, steam side annular fin plate bunch and sea water side annular fin plate bunch superpose layer upon layer and constitute a whole and arrange annular plate bunch internally, be equipped with steam inlet and sea water inlet on one end of annular plate bunch body, be equipped with sea water export and steam condensate export on the other end, steam inlet and sea water inlet, sea water export and steam condensate export arrange about the axis of annular plate bunch body relatively respectively, and four all communicate with the inside of annular plate bunch body.
Furthermore, the steam inlet comprises a steam inlet connecting pipe I and a steam inlet connecting pipe II which are horizontally arranged at intervals, and one end parts of the steam inlet connecting pipes I and the steam inlet connecting pipes II are respectively communicated with one end surface of the annular plate bundle body; the seawater inlet comprises a seawater inlet connecting pipe I and a seawater inlet connecting pipe II which are horizontally arranged at intervals, and one end parts of the seawater inlet connecting pipe I and the seawater inlet connecting pipe II are respectively communicated with one end surface of the annular plate bundle body; the seawater outlet comprises a seawater outlet connecting pipe I and a seawater outlet connecting pipe II which are horizontally arranged at intervals, and one end parts of the seawater outlet connecting pipes I and the seawater outlet connecting pipes II are respectively communicated with the other end surface of the annular plate bundle body; the steam condensate outlet comprises a steam condensate outlet connecting pipe, one end of the steam condensate outlet connecting pipe is communicated with the other end face of the annular plate bundle body, the first steam inlet connecting pipe, the second steam inlet connecting pipe, the first seawater outlet connecting pipe and the second seawater outlet connecting pipe are positioned on the annular plate bundle body in the same direction, and the first seawater inlet connecting pipe, the second seawater inlet connecting pipe and the second steam condensate outlet connecting pipe are positioned on the annular plate bundle body in the opposite direction.
Furthermore, the plate surface of the steam side annular fin plate bundle is of a symmetrical structure and comprises a pair of symmetrical guide fins and a pair of first annular corrugated fins, one side edges of the two guide fins are connected through a thick metal partition plate, the opposite side edges of the two guide fins are connected with one side surface of the first annular corrugated fin in an integrated forming mode respectively, the other side edges of the two first annular corrugated fins are connected in an integrated forming mode, a pair of guide fins are provided with a symmetrical steam inlet distribution cavity and a symmetrical seawater outlet connection pipe cavity respectively, the interconnection position of the two first annular corrugated fins is provided with two symmetrical seawater inlet connection pipe cavities, and a steam condensate outlet distribution cavity is further formed between the two first annular corrugated fins.
Furthermore, the plate surface of the seawater side annular fin plate bundle is of a symmetrical structure and comprises two symmetrical annular corrugated fins II, one side end of each of the two annular corrugated fins II is connected with one inlet flow guide fin in an integrated forming mode, the other side end of each of the two annular corrugated fins II is connected with one outlet flow guide fin in an integrated forming mode, the other side of each of the two inlet flow guide fins is connected with one steam inlet connecting pipe cavity through one thick metal partition plate II, the two steam inlet connecting pipe cavities are connected through the other thick metal partition plate II, the other side of each of the two outlet flow guide fins is connected with the two opposite sides of the condensate outlet connecting pipe cavity through the other thick metal partition plate II, two symmetrical seawater outlet distribution cavities are formed in the two inlet flow guide fins, and two symmetrical seawater inlet distribution cavities are formed in the two outlet flow guide fins.
Furthermore, the steam side annular fin plate bundle and the seawater side annular fin plate bundle are overlapped layer by layer, so that the steam inlet distribution cavity and the steam inlet connecting pipe cavity, the seawater outlet connecting pipe cavity and the seawater outlet distribution cavity, the seawater inlet connecting pipe cavity and the seawater inlet distribution cavity, and the steam condensate outlet distribution cavity and the condensate outlet connecting pipe cavity are respectively corresponding to each other and overlapped layer by layer to form a channel structure.
Preferably, the first circumferential corrugated fin is a corrugated structure formed by sequentially arranging solid corrugated strips and corrugated grooves at intervals; and the second annular corrugated fin is of a wave-shaped plate structure, and a plurality of dotted line-shaped corrugated holes are formed in the second annular corrugated fin.
Optimally, the steam side annular fin plate bundle and the seawater side annular fin plate bundle are stacked layer by layer at intervals in sequence in a single layer, and the first layer and the tail layer of the whole are both the steam side annular fin plate bundle.
Preferably, the steam side annular fin plate bundles and the seawater side annular fin plate bundles are stacked in a manner that one layer of seawater side annular fin plate bundle is stacked between every two layers of steam side annular fin plate bundles, and the first layer and the tail layer of the whole steam side annular fin plate bundle are steam side annular fin plate bundles.
Furthermore, the annular plate bundle body comprises an upper cover plate, a lower cover plate and an annular shell, wherein the two opposite sides of the annular shell are respectively connected with the upper cover plate and the lower cover plate, the steam inlet and the seawater inlet are both arranged on the upper cover plate, and the seawater outlet and the steam condensate outlet are both arranged on the lower cover plate.
The use method of the annular steam condenser suitable for the deep sea high pressure comprises the following steps:
the method comprises the following steps: steam enters the annular plate bundle body from the steam inlet, and simultaneously seawater flows into the annular plate bundle body from the seawater inlet;
step two: in the first step, steam flows through the steam side annular fin plate bundle, uniformly passes through the guide fins, enters the first annular corrugated fin arranged on the windward side, and exchanges heat with seawater;
step three: in the first step, the seawater then flows into the seawater side annular fin plate bundles, the seawater in each layer of seawater side annular fin plate bundle flows through the inlet guide fins to complete the transverse distribution of fluid, and then enters the annular corrugated fins II arranged on the windward side to complete the heat exchange with the steam;
step four: in the second step, condensed water formed after heat exchange between steam and seawater flows out from a steam condensate outlet below the rear end of the annular plate bundle body through a steam condensate outlet distribution cavity arranged at the bottom under the action of fluid entrainment and gravity settling;
step five: in the third step, the seawater after heat exchange with the steam flows into the outlet guide fins, is converged by the seawater outlet distribution cavity after rectification, and flows out from the seawater outlet above the rear end of the annular plate bundle body.
Has the advantages that: compared with the prior art, the invention has the advantages that:
(1) the annular steam condenser provided by the invention has the advantages of high heat transfer efficiency, compact structure, pressure resistance, reliability and the like due to the low-rib low-resistance reinforced fins adopted in the main heat exchange area, and is particularly suitable for deep sea equipment platforms with limited space and strict requirements on space arrangement and connecting pipe positions;
(2) aiming at the working condition that the difference between the pressure of deep sea water and the working pressure of fluid in an equipment platform is large, the traditional condenser is difficult to realize high-efficiency heat exchange under the large pressure difference of cold and hot fluid in the traditional condenser, the annular plate-fin heat exchanger designed by the invention not only has structures such as a partition plate and a fin supported at multiple points in a plate bundle body, but also avoids the problem of welding leakage of partial areas based on an integral vacuum brazing process, and greatly improves the capacity of the steam condenser for bearing internal pressure.
(3) Aiming at the condition that a condenser in a deep sea environment is easy to suffer from seawater electrochemical corrosion, the annular steam condenser base material provided by the invention can be manufactured by adopting a titanium alloy material with salt spray corrosion resistance or an aluminum alloy material with light weight and high heat exchange efficiency, and can be arranged in an electroplating pool to carry out electroplating anticorrosion treatment in a post-treatment process if necessary.
(4) Aiming at the condition of excessive vibration noise caused by high flow velocity of the steam side, the invention enlarges the windward area of the steam side flow channel and adopts the steam side annular fin plate bundle and the seawater side annular fin plate bundle which are arranged in a overlapping way, thereby effectively reducing the flow velocity of the steam.
(5) For the condition that the steam side needs to drain liquid in time to prevent pressure building, the invention utilizes the wrapping and spraying of the condensate liquid at the outlet and the gravity settling effect to drain the liquid through the condensate liquid outlet connecting pipe at the bottom, thereby effectively solving the problem of liquid loading of the heat exchanger.
Drawings
FIG. 1 is a schematic view of a front end viewing angle configuration of the present invention;
FIG. 2 is a schematic rear view of the present invention;
FIG. 3 is an exploded front view of the present invention;
FIG. 4 is an exploded rear view of the present invention;
FIG. 5 is a schematic vapor side fluid flow diagram of the present invention;
FIG. 6 is a schematic flow diagram of a seawater fluid flow of the present invention;
FIG. 7 is a schematic structural view of a steam side annular fin plate bundle;
FIG. 8 is a schematic perspective view of a steam side annular fin plate bundle;
FIG. 9 is a schematic structural view of a seawater-side annular fin plate bundle;
fig. 10 is a schematic perspective view of a seawater-side annular fin plate bundle.
Detailed Description
The present invention will be further illustrated with reference to the following figures and specific examples, which are to be understood as merely illustrative and not restrictive of the scope of the invention.
An annular steam condenser suitable for deep sea high pressure comprises an annular plate bundle body 1, a steam side annular fin plate bundle 2 and a seawater side annular fin plate bundle 3, as shown in figures 1-10.
The annular plate bundle body 1 is of an annular cylinder structure, the annular plate bundle body 1 comprises an upper cover plate 4, a lower cover plate 5 and an annular shell 5a, and the two opposite sides of the annular shell 5a are respectively connected with the upper cover plate 4 and the lower cover plate 5.
The steam side annular fin plate bundle 2 and the seawater side annular fin plate bundle 3 are stacked layer upon layer to form a whole body which is arranged in the annular plate bundle body 1, and the stacking form of the steam side annular fin plate bundle 2 and the seawater side annular fin plate bundle 3 can be as follows: the single layers are stacked layer by layer at intervals in turn, and the head layer and the tail layer of the whole body are steam side annular fin plate bundles 2; in addition, a layer of seawater side annular fin plate bundle 3 can be superposed between every two layers of steam side annular fin plate bundles 2, and the first layer and the tail layer of the whole are both steam side annular fin plate bundles 2.
The upper cover plate 4 is provided with a steam inlet and a seawater inlet, the lower cover plate 5 is provided with a seawater outlet and a steam condensate outlet, the steam inlet and the seawater inlet, the seawater outlet and the steam condensate outlet are respectively arranged relative to the central axis of the annular plate bundle body 1, and the steam inlet and the seawater outlet and the steam condensate outlet are all communicated with the inside of the annular plate bundle body 1.
The steam inlet comprises a first steam inlet connecting pipe 6 and a second steam inlet connecting pipe 7 which are horizontally arranged at intervals, and one end parts of the two pipes are respectively communicated with one end surface of the annular plate bundle body 1; the seawater inlet comprises a seawater inlet connecting pipe I8 and a seawater inlet connecting pipe II 9 which are horizontally arranged at intervals, and one end parts of the seawater inlet connecting pipe I and the seawater inlet connecting pipe II are respectively communicated with one end surface of the annular plate bundle body 1; the seawater outlet comprises a seawater outlet connecting pipe I10 and a seawater outlet connecting pipe II 11 which are horizontally arranged at intervals, and one end parts of the seawater outlet connecting pipes I and the seawater outlet connecting pipe II are respectively communicated with the other end surface of the annular plate bundle body 1; the steam condensate outlet comprises a steam condensate outlet connecting pipe 12, one end of the steam condensate outlet connecting pipe is communicated with the other end face of the annular plate bundle body 1, the first steam inlet connecting pipe 6, the second steam inlet connecting pipe 7, the first seawater outlet connecting pipe 10 and the second seawater outlet connecting pipe 11 are positioned on the annular plate bundle body 1 in the same direction, and the first seawater inlet connecting pipe 8, the second seawater inlet connecting pipe 9 and the steam condensate outlet connecting pipe 12 are positioned on the annular plate bundle body 1 in the opposite direction.
The plate surface of the steam side annular fin plate bundle 2 is of a symmetrical structure, the plate surface comprises a pair of symmetrical guide fins 2b and a pair of annular corrugated fins 2d, one side edges of the two guide fins 2b are connected through a thick metal partition plate 2g, the other opposite side edge is connected with one side surface of the annular corrugated fins 2d in an integrated forming mode, the other side edge of the two annular corrugated fins 2d is connected in an integrated forming mode, a symmetrical steam inlet distribution cavity 2a and a symmetrical seawater outlet connection pipe cavity 2c are respectively formed in the pair of guide fins 2b, two symmetrical seawater inlet connection pipe cavities 2e are formed in the interconnection position of the two annular corrugated fins 2d, and a steam condensate outlet distribution cavity 2f is further formed between the two annular corrugated fins. The circumferential corrugated fin 2d is of a corrugated structure formed by sequentially arranging solid corrugated strips and corrugated grooves at intervals.
When the steam fluid passes through the guide fins 2b, the steam fluid can uniformly pass through the blind cover of the seawater outlet connecting pipe cavity 2 c; the first annular corrugated fin 2d is used for exchanging heat with seawater; the steam condensate outlet distribution cavity 2f is used for discharging condensate water formed by fluid entrainment spraying and stacking force sedimentation at the outlet through a steam condensate outlet connecting pipe 12 arranged at the bottom; a thick metal partition plate 2g is welded between the two steam inlet distribution chambers 2a to ensure the uniform distribution of the fluid on the left and right sides and to provide a certain axial strength.
The plate surface of the seawater side annular fin plate bundle 3 is of a symmetrical structure and comprises two symmetrical annular corrugated fins 3d, one side end of each annular corrugated fin 3d is connected with an inlet flow guide fin 3c in an integrated forming mode, the other side end of each annular corrugated fin is connected with an outlet flow guide fin 3e in an integrated forming mode, the other side of each inlet flow guide fin 3c is connected with a steam inlet connecting pipe cavity 3a through a thick metal partition plate two 3h, the two steam inlet connecting pipe cavities 3a are connected through another thick metal partition plate two 3h, the other sides of the two outlet flow guide fins 3e are connected with the two opposite sides of a condensate outlet connecting pipe cavity 3g through another thick metal partition plate two 3h, two symmetrical seawater outlet distribution cavities 3b are formed in the two inlet flow guide fins 3c, and two symmetrical seawater inlet distribution cavities 3f are formed in the two outlet flow guide fins 3 e. The second annular corrugated fin 3d is of a wave-shaped plate-shaped structure, and a plurality of dotted line-shaped corrugated holes are formed in the wave-shaped plate-shaped structure.
The steam side annular fin plate bundle 2 and the seawater side annular fin plate bundle 3 are overlapped layer by layer, so that the steam inlet distribution cavity 2a corresponds to the steam inlet connecting pipe cavity 3a, the seawater outlet connecting pipe cavity 2c corresponds to the seawater outlet distribution cavity 3b, the seawater inlet connecting pipe cavity 2e corresponds to the seawater inlet distribution cavity 3f, and the steam condensate outlet distribution cavity 2f corresponds to the condensate outlet connecting pipe cavity 3g respectively, and the channel structures are formed by overlapping layer by layer.
The second annular corrugated fin 3d in the seawater side annular fin plate bundle 3 has the function of exchanging heat with seawater; seawater in each layer of seawater side annular fin plate bundle flows through the inlet guide fin 3e to finish the transverse distribution of fluid, then flows through the annular corrugated fin II 3d, then flows into the seawater outlet distribution cavity 3b through the outlet guide fin 3c to be converged, and finally flows out through the seawater outlet connecting pipe 10 and the seawater outlet connecting pipe 11 which are arranged above the rear end of the annular plate bundle body 1.
A second thick metal partition plate 3h which is sealed and pressure-resistant is welded between a pair of steam inlet connecting pipe cavities 3a in the seawater side annular fin plate bundle 3 and the seawater outlet distribution cavity 3b respectively; a pair of seawater inlet distribution cavities 3f in the seawater side annular fin plate bundle 3 and a steam condensate outlet connecting pipe cavity 3g are respectively welded with a thick metal partition plate II 3h for sealing and pressure resistance, the thick metal partition plate II is separated from steam, the seawater side fluid is uniformly distributed on the left side and the right side, strength support in the cavity is provided, and the thickness of the partition plate is independently checked according to the operation pressure difference and the specific size of the steam side fluid and the seawater side fluid.
The guide fins 2b and the first annular corrugated fins 2d in the steam side annular fin plate bundle 2 are low-rib fins with the same fin thickness; the outlet guide fin 3c, the first annular corrugated fin 3d and the inlet guide fin 3e in the seawater side annular fin plate bundle 3 are low-rib fins with the same fin thickness.
A first steam inlet connecting pipe 6 and a second steam inlet connecting pipe 7 which are connected above the front end of the annular plate bundle body 1 are both of circular hole structures; a seawater inlet connecting pipe I8 and a seawater inlet connecting pipe II 9 which are connected below the front end of the annular plate bundle body 1 are both of circular hole structures; a seawater outlet connecting pipe I10 and a seawater outlet connecting pipe II 11 which are connected above the rear end of the annular plate bundle body are both of circular hole structures; the steam condensate outlet connecting pipe 12 connected below the rear end of the annular plate bundle body is of a circular hole structure, and the size and the number of the circular holes are determined by the size and the number of the connected aluminum pipes.
The base material of the condenser can be aluminum alloy or titanium alloy, and can be used for electroplating and corrosion-resistant treatment of the fin runner structure in strong corrosion occasions.
The surfaces of parent metals of the steam side annular plate bundle fin 2 and the seawater side annular fin plate bundle 3 are covered with a layer of brazing alloy, and the alloy can be melted in the vacuum brazing process, so that the upper and lower layers of fin plate bundles are tightly welded into a whole, the brazing quality of the steam condenser is improved, the internal and external leakage rate of the steam condenser is reduced, and the sealing reliability of the steam condenser is ensured.
The flow rate of the fluid at the seawater side inlet and outlet is different from that of the fluid at the steam side inlet and outlet, wherein the flow rate of the fluid at the steam side inlet is far greater than that of the fluid at other positions.
The use method of the annular steam condenser suitable for the deep sea high pressure comprises the following steps:
the method comprises the following steps: steam enters the annular plate bundle body from the steam inlet, and simultaneously seawater flows into the annular plate bundle body from the seawater inlet;
step two: in the first step, steam flows through the steam side annular fin plate bundle, uniformly passes through the guide fins, enters the first annular corrugated fin arranged on the windward side, and exchanges heat with seawater;
step three: in the first step, the seawater then flows into the seawater side annular fin plate bundles, the seawater in each layer of seawater side annular fin plate bundle flows through the inlet guide fins to complete the transverse distribution of fluid, and then enters the annular corrugated fins II arranged on the windward side to complete the heat exchange with the steam;
step four: in the second step, condensed water formed after heat exchange between steam and seawater flows out from a steam condensate outlet below the rear end of the annular plate bundle body through a steam condensate outlet distribution cavity arranged at the bottom under the action of fluid entrainment and gravity settling;
step five: in the third step, the seawater after heat exchange with the steam flows into the outlet guide fins, is converged by the seawater outlet distribution cavity after rectification, and flows out from the seawater outlet above the rear end of the annular plate bundle body.
An example operating mode of the invention is:
the low-pressure wet steam exchanges heat with high-pressure seawater, and the steam side is designed to work: 6.6kg/s of mass flow, 0.2MPa of inlet pressure, 120 ℃ of inlet temperature and 0.5 of dryness. Seawater side design working condition: the volume flow rate is 40L/s, the inlet pressure is 11MPa, and the inlet temperature is 20 ℃. The steam side outlet is required to be condensate at 85 ℃, the pressure drop is less than 50kPa, and the seawater side pressure drop is less than 200 kPa. According to design requirements and a design scheme of the invention, a condenser base material adopts aluminum alloy 5083, a fin material adopts aluminum alloy 3003, a seawater side inlet adopts 2 phi 115 x 10mm thick-wall aluminum pipes, a seawater side outlet adopts 2 phi 115 x 10mm thick-wall aluminum pipes, a steam side inlet adopts 2 phi 230 x 5mm standard aluminum pipes, and a steam side condensate outlet adopts a single DN80 standard aluminum pipe. The number of the seawater side plate bundles is 10, the seawater side heat transfer coefficient is 16069.9W/m < 2 > 2K, the surface efficiency of the seawater side fins is 0.31, and the seawater side heat transfer area is about 77.2 square meters (roughly counted into a flow guide area); the steam side plate bundle number was 22 layers, the steam side heat transfer coefficient was 7438.9W/m2K, the steam side fin surface efficiency was 0.41, and the steam side heat transfer area was about 169.8m2 (roughly counted in the lead-in zone). The plate bundle stacking arrangement is in the form of 2+ 1. The fouling coefficient of the seawater side is 0.086e-3m < 2 > 2K/W, the total heat conductivity value of the heat exchanger is 154143, the heat exchange capacity is qualified through checking, the design margin is greater than 10%, the pressure drop of the seawater side is 1.95Pa, the pressure drop of the steam side is 2.82kPa, and the pressure drop is qualified through checking. The total weight of the heat exchanger was about 495.14kg (not counting the connecting tubes), and the heat exchanger size was 1.35X 0.45 m.
The plate-fin condenser adopted by the annular steam condenser is an efficient energy-saving condenser, has the advantages of small volume, light weight, large heat exchange area per unit volume, small resistance and capability of realizing simultaneous heat exchange of multiple streams, and is particularly suitable for the fields of deep cooling, oil-gas liquefaction and the like.
Claims (10)
1. The utility model provides an annular steam condenser suitable for deep sea high pressure which characterized in that: the steam-side annular fin plate bundle comprises an annular plate bundle body (1), a steam-side annular fin plate bundle (2) and a seawater-side annular fin plate bundle (3), wherein the steam-side annular fin plate bundle (2) and the seawater-side annular fin plate bundle (3) are stacked layer by layer to form a whole body and are arranged inside the annular plate bundle body (1), a steam inlet and a seawater inlet are formed in one end face of the annular plate bundle body (1), a seawater outlet and a steam condensate outlet are formed in the other end face of the annular plate bundle body, the steam inlet and the seawater inlet are arranged, the seawater outlet and the steam condensate outlet are arranged relative to the central axis of the annular plate bundle body (1), and the steam inlet, the seawater outlet and the steam condensate outlet are communicated with the inside of the annular plate bundle body (1).
2. The annular steam condenser suitable for deep sea high pressure according to claim 1, wherein: the steam inlet comprises a first steam inlet connecting pipe (6) and a second steam inlet connecting pipe (7), the first steam inlet connecting pipe and the second steam inlet connecting pipe are horizontally arranged at intervals, and one end parts of the first steam inlet connecting pipe and the second steam inlet connecting pipe are respectively communicated with one end surface of the annular plate bundle body (1); the seawater inlet comprises a seawater inlet connecting pipe I (8) and a seawater inlet connecting pipe II (9), the seawater inlet connecting pipe I and the seawater inlet connecting pipe II are horizontally arranged at intervals, and one end parts of the seawater inlet connecting pipe II and the seawater inlet connecting pipe II are respectively communicated with one end surface of the annular plate bundle body (1); the seawater outlet comprises a seawater outlet connecting pipe I (10) and a seawater outlet connecting pipe II (11), the seawater outlet connecting pipe I and the seawater outlet connecting pipe II are horizontally arranged at intervals, and one end parts of the seawater outlet connecting pipe II are respectively communicated with the other end surface of the annular plate bundle body (1); the steam condensate outlet comprises a steam condensate outlet connecting pipe (12), one end of the steam condensate outlet connecting pipe is communicated with the other end face of the annular plate bundle body (1), the steam inlet connecting pipe I (6), the steam inlet connecting pipe II (7), the seawater outlet connecting pipe I (10) and the seawater outlet connecting pipe II (11) are located on the annular plate bundle body (1) in the same direction, and the seawater inlet connecting pipe I (8), the seawater inlet connecting pipe II (9) and the steam condensate outlet connecting pipe (12) are located on the annular plate bundle body (1) in the same direction.
3. The annular steam condenser suitable for deep sea high pressure according to claim 1, wherein: the face of steam side annular fin board bundle (2) is symmetrical structure, a pair of water conservancy diversion fin (2b) including the symmetry on it, a pair of hoop corrugated fin (2d), two water conservancy diversion fin (2b) one side is connected through thick type metal separator (2g), relative opposite side is connected with a side integrated into one piece of hoop corrugated fin (2d) respectively, the opposite side integrated into one piece of two hoop corrugated fin (2d) is connected, set up steam inlet distribution chamber (2a) of symmetry on a pair of water conservancy diversion fin (2b) respectively, sea water export takeover cavity (2c), two sea water entry takeover cavities (2e) of symmetry are seted up to the interconnection department of two hoop corrugated fin (2d), still set up a steam condensate export distribution chamber (2f) between the two.
4. An annular steam condenser suitable for deep sea high pressure according to claim 3, wherein: the plate surface of the seawater side annular fin plate bundle (3) is of a symmetrical structure and comprises two symmetrical annular corrugated fins (3d), one side end of each annular corrugated fin (3d) is connected with an inlet guide fin (3c) in an integrated manner, the other side end of each annular corrugated fin is connected with an outlet guide fin (3e) in an integrated manner, the other side of each inlet guide fin (3c) is connected with a steam inlet connecting pipe cavity (3a) through a thick metal partition plate II (3h), the two steam inlet connecting pipe cavities (3a) are connected with each other through another thick metal partition plate II (3h), the other sides of the two outlet guide fins (3e) are connected with the two opposite sides of a condensate outlet cavity (3g) through another thick metal partition plate II (3h), and the two inlet guide fins (3c) are provided with two symmetrical seawater outlet distribution cavities (3b), two symmetrical seawater inlet distribution cavities (3f) are arranged on the two outlet guide fins (3 e).
5. The annular steam condenser suitable for deep sea high pressure according to claim 4, wherein: the steam side annular fin plate bundle (2) and the seawater side annular fin plate bundle (3) are overlapped layer by layer, so that the steam inlet distribution cavity (2a) corresponds to the steam inlet connecting pipe cavity (3a), the seawater outlet connecting pipe cavity (2c) corresponds to the seawater outlet distribution cavity (3b), the seawater inlet connecting pipe cavity (2e) corresponds to the seawater inlet distribution cavity (3f), and the steam condensate outlet distribution cavity (2f) corresponds to the condensate outlet connecting pipe cavity (3g) respectively and is overlapped layer by layer to form a channel structure.
6. The annular steam condenser suitable for deep sea high pressure according to claim 4, wherein: the first annular corrugated fin (2d) is a corrugated structure formed by sequentially arranging solid corrugated strips and corrugated grooves at intervals; the second annular corrugated fin (3d) is of a wave-shaped plate-shaped structure, and a plurality of dotted line-shaped corrugated holes are formed in the second annular corrugated fin.
7. The annular steam condenser suitable for the deep sea high pressure as claimed in any one of claims 1 and 3 to 6, wherein: the steam side annular fin plate bundle (2) and the seawater side annular fin plate bundle (3) are stacked layer by layer at intervals in sequence in a single layer, and the first layer and the tail layer of the whole steam side annular fin plate bundle (2) are both provided.
8. The annular steam condenser suitable for the deep sea high pressure as claimed in any one of claims 1 and 3 to 6, wherein: the steam side annular fin plate bundle (2) and the seawater side annular fin plate bundle (3) are overlapped in a mode that one layer of seawater side annular fin plate bundle (3) is overlapped between every two layers of steam side annular fin plate bundles (2), and the head layer and the tail layer of the whole steam side annular fin plate bundle (2) are both steam side annular fin plate bundles.
9. The annular steam condenser suitable for deep sea high pressure according to claim 1, wherein: the annular plate bundle body (1) comprises an upper cover plate (4), a lower cover plate (5) and an annular shell (5a), wherein the two opposite sides of the annular shell (5a) are respectively connected with the upper cover plate (4) and the lower cover plate (5), a steam inlet and a seawater inlet are both arranged on the upper cover plate (4), and a seawater outlet and a steam condensate outlet are both arranged on the lower cover plate (5).
10. A use method of the annular steam condenser suitable for the deep sea high pressure as claimed in any one of claims 3 to 6, is characterized by comprising the following steps:
the method comprises the following steps: steam enters the annular plate bundle body from the steam inlet, and simultaneously seawater flows into the annular plate bundle body from the seawater inlet;
step two: in the first step, steam flows through the steam side annular fin plate bundle, uniformly passes through the guide fins, enters the first annular corrugated fin arranged on the windward side, and exchanges heat with seawater;
step three: in the first step, the seawater then flows into the seawater side annular fin plate bundles, the seawater in each layer of seawater side annular fin plate bundle flows through the inlet guide fins to complete the transverse distribution of fluid, and then enters the annular corrugated fins II arranged on the windward side to complete the heat exchange with the steam;
step four: in the second step, condensed water formed after heat exchange between steam and seawater flows out from a steam condensate outlet below the rear end of the annular plate bundle body through a steam condensate outlet distribution cavity arranged at the bottom under the action of fluid entrainment and gravity settling;
step five: in the third step, the seawater after heat exchange with the steam flows into the outlet guide fins, is converged by the seawater outlet distribution cavity after rectification, and flows out from the seawater outlet above the rear end of the annular plate bundle body.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115077267A (en) * | 2022-08-19 | 2022-09-20 | 中国核动力研究设计院 | Heat exchange member and condenser |
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