CN113149106A - Heat exchange tube of low-temperature multi-effect seawater desalination device and evaporator formed by same - Google Patents
Heat exchange tube of low-temperature multi-effect seawater desalination device and evaporator formed by same Download PDFInfo
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- CN113149106A CN113149106A CN202110349602.8A CN202110349602A CN113149106A CN 113149106 A CN113149106 A CN 113149106A CN 202110349602 A CN202110349602 A CN 202110349602A CN 113149106 A CN113149106 A CN 113149106A
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- heat exchange
- evaporator
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- exchange tube
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The invention belongs to the technical field of seawater desalination, and provides a heat exchange tube of a low-temperature multi-effect seawater desalination device and an evaporator formed by the same, wherein a plurality of effect body evaporators are connected in series through connecting flanges, the novel evaporator comprises an evaporator shell and is characterized in that a heat exchange tube support frame is arranged in the evaporator shell and fixedly connected with the evaporator shell, a plurality of heat exchange tubes are arranged in the heat exchange tube support frame, an inlet tube plate and an outlet tube plate are arranged at two ends of the evaporator shell respectively, the heat exchange tubes are fixed through the inlet tube plate and the outlet tube plate, a fresh water collecting box is arranged on the outlet tube plate, a fresh water collecting pipeline is arranged on the fresh water collecting box, a spray pipe is arranged above the inside of the evaporator shell, a brine collecting pipe is arranged below the inside of the evaporator shell, a demister is arranged at the outlet end of the evaporator shell, the demister is a louver type steam demister, and an outlet of the demister is connected with a condenser.
Description
Technical Field
The invention relates to the technical field of seawater desalination, in particular to a heat exchange tube of a low-temperature multi-effect seawater desalination device and an evaporator formed by the same.
Background
The low-temperature multi-effect seawater desalination device is characterized in that a series of evaporators (for short, effect) containing a spray pipe bundle and a heat exchange pipe bundle are connected in series, original seawater is uniformly distributed on the outer surface of the heat exchange pipe bundle in the effect evaporator through the spray pipe bundle in the heat exchange process, the seawater on the outer surface of the pipe bundle absorbs latent heat of steam to be vaporized, the steam on the inner wall of the pipe bundle is condensed into fresh water when meeting the condensation, and the fresh water is evaporated and condensed for many times in the device, so that the process of desalinating water with the steam amount being many times is obtained.
At present, a low-temperature multi-effect seawater desalination device is generally arranged in an effect body by adopting a straight pipe type or external thread pipe type heat exchange pipe bundle such as a copper alloy, an aluminum alloy, a titanium pipe and the like. The straight tube type heat exchange tube bundle is low in price and convenient to install, but has small heat exchange area and low heat exchange efficiency, and is not beneficial to full recycling of steam heat energy; the external thread tubular heat exchange tube can effectively increase heat transfer area, promotes whole heat transfer effect, nevertheless receives the suspended solid and the glutinous mud of sea water clamping part in the spraying system and spray water distribution in-process extremely easily the jam in two ripple clearances, leads to the heat transfer area to reduce, and the water distribution runner blocks up to cause heat exchange efficiency to reduce, make water and compare the reduction.
Meanwhile, according to the technological requirements of the existing low-temperature multi-effect seawater desalination device, in order to prevent seawater from leaking to the fresh water side and influencing the quality of desalinated water, a heat exchange tube bundle of the existing low-temperature multi-effect seawater desalination device is often an independent sealed heat exchange tube section. Due to the limitation of the large number of the heat exchange tube bundles and the limitation of the internal structural space of the effect body evaporator, the replacement condition of the installed heat exchange tube bundles cannot be implemented. The mode of handling this kind of problem at present can only cancel its heat transfer effect through the shutoff to seepage position heat exchanger tube bank both ends, and then maintain the continuation of other heat exchanger tube banks and use, but this mode can cause the sea water desalination device heat transfer area to reduce, the reduction of heat exchange efficiency to cause the sea water desalination device to imitate the reduction of body evaporator desalination water ratio greatly reduced, will lead to the sea water desalination device to normally put into production running state in the past.
The following problems exist in the prior art:
the low-temperature seawater desalination device is complex in overall structure inside the effect body, and generally, all heat exchange tubes in the effect body are inspected and maintained aiming at a certain effect, so that the difficulty is high; in the long-term operation process of the device, part of heat exchange tubes are corroded, and the device is difficult to inspect and cannot be replaced under normal conditions due to the fact that the device cannot be independently disassembled, so that the quality of desalted water of the system is affected; the prior art has complex working operation and labor waste for judging the corroded part; the spraying process of the spraying system causes the scouring effect on the heat exchange tube bundle, causes the thinning and even perforation of the outer wall of the heat exchange tube and finally causes the leakage of the heat exchange tube; the existing effective body evaporator mostly adopts straight pipes such as copper alloy, aluminum alloy and titanium pipes as heat exchange pipes, the heat exchange area of the heat exchange pipes is small, the space utilization rate of the effective body evaporator is low, and the heat exchange efficiency is reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a heat exchange tube of a low-temperature multi-effect seawater desalination device and an evaporator formed by the same.
A heat exchange tube of a low-temperature multi-effect seawater desalination device and an evaporator composed of the same, wherein a plurality of effect body evaporators are connected in series with each other through connecting flanges, and each effect body evaporator comprises: the novel solar energy fresh water evaporator comprises an evaporator shell, a spraying pipe, a heat exchange pipe, a demister, a heat exchange pipe support frame, a fresh water collecting pipeline, a salt water collecting pipe, a fresh water collecting box, an inlet pipe plate and an outlet pipe plate, wherein the heat exchange pipe support frame is arranged in the evaporator shell and fixedly connected with the evaporator shell, a plurality of heat exchange pipes are arranged in the heat exchange pipe support frame, the inlet pipe plate and the outlet pipe plate are respectively arranged at two ends of the evaporator shell, the heat exchange pipes are all fixed through the inlet pipe plate and the outlet pipe plate, the fresh water collecting box is arranged on the outlet pipe plate, the fresh water collecting pipeline is arranged on the fresh water collecting box, the spraying pipe is arranged above the inside of the evaporator shell, the salt water collecting pipe is arranged below the inside of the evaporator shell, the outlet end of the evaporator shell is provided with the demister, the demister is a shutter type steam demister, and the outlet of the demister is connected with a condenser.
Further, the heat exchange tube support frame includes: the evaporator shell is of a cylindrical structure, three supporting frames are arranged in the evaporator shell along an axial linear array, every two adjacent supporting frames are connected through the connecting plate, and heat exchange tubes are arranged in the supporting frames.
Further, the support frame includes: first support list frame and second support list frame, be provided with two first support list frames and two second support list frames in the evaporator shell, two first support list frames and two second support list frames are along the perpendicular central line symmetry setting on the evaporator shell radial cross-section, adjacent first support list frame and second support list frame are all through connecting short slab welded fastening, all be provided with in first support list frame and the second support list frame and place the hole, well placing hole and lower placing hole, place the hole on, well placing hole and lower placing downthehole a plurality of heat exchange tubes of all staggered arrangement in the hole, every placing downthehole equal dismouting alone of ability.
Further, the heat exchange tubes are all fixed between the inlet tube plate and the outlet tube plate in a sealing mode through rubber grommet rings, the inlet tube plate and the outlet tube plate are both of hollow structures, a first steam blocking plate is arranged in the inlet tube plate and located between the middle placing hole and the lower placing hole, a second steam blocking plate is arranged on the outlet tube plate and located between the middle placing hole and the lower placing hole, and a steam inlet is formed in the inlet tube plate.
Furthermore, the fresh water collecting box is communicated with the outlet tube plate, the communicating part of the fresh water collecting box and the outlet tube plate is positioned above the second steam baffle plate, and a noncondensable gas collecting port is arranged above the fresh water collecting box.
Furthermore, a plurality of nozzles are arranged on the spray pipe in a linear array mode, the nozzles are detachably mounted with the spray pipe, the bottom surface of each nozzle is horizontally arranged, an anti-scouring guide rod is arranged between the inlet pipe plate and the outlet pipe plate, and the anti-scouring guide rods are located between the nozzles and the heat exchange pipe.
Furthermore, the anti-scouring guide rod is a hollow rod made of polyurethane material, and a support rod made of glass fiber reinforced plastic is arranged in the anti-scouring guide rod.
Further, the length of the spiral fin on the inner wall of the heat exchange tube is the largest at the upper part, the spiral fin is gradually reduced towards two sides, the length of the spiral fin is reduced to zero until the length of the minimum point, the heat exchange tube can be spliced on line in a split type assembly mode, the whole through connection is realized through internal and external rotating threads, and a thread sealing surface is provided with a rubber O-shaped ring.
Further, a sacrificial anode is fixedly arranged at the bottom of the evaporator shell.
Further, be provided with the peep observation hole on the evaporimeter casing, peep observation hole and evaporimeter casing outer wall direct fixed connection, peep the observation hole and set up transparent organic glass, peep the observation hole and be used for observing shower spraying sea water distribution condition and heat exchange tube outer wall scale deposit degree.
The invention has the beneficial effects that:
the invention provides a heat exchange tube of a low-temperature multi-effect seawater desalination device and an evaporator composed of the heat exchange tube, and the microcirculation internal thread heat exchange tube of the low-temperature multi-effect seawater desalination device is developed, so that the heat exchange area is effectively increased, the heat exchange efficiency of the heat exchange tube is improved, meanwhile, the spiral structure of the inner wall is convenient for guiding and dredging steam airflow, the flowing uniformity of steam is improved, the low-resistance circulation of steam condensate is facilitated, and the space utilization rate of an effective body evaporator is effectively improved; the invention effectively solves the problem that the water making ratio of the sea fresh water device is reduced due to the reduction of heat exchange efficiency caused by the plugging of the heat exchange tube, adopts the split type assembly type heat exchange tube online splicing technology, realizes the integral through by the internal and external rotating threads by utilizing the butt joint of the guide draw bar, and the threaded sealing surface is provided with the rubber O-shaped ring for plugging the sealing surface, thereby avoiding the structural space limitation of the effective body evaporator and solving the technical problem that the integral replacement of the heat exchange tube bundle cannot be realized; the anti-scouring guide rod is arranged above the heat exchange tube bundle, so that erosion caused by direct scouring of the lower heat exchange tube due to silt mixed in seawater in the spraying process is effectively avoided; the heat exchange tubes are hermetically fixed between the inlet tube plate and the outlet tube plate through the rubber grommet, and the plurality of heat exchange tubes are arranged in a staggered manner between the tube plates, so that seawater is fully contacted with the heat exchange tubes, and the heat recovery efficiency is improved; the sacrificial anode is directly and fixedly connected with the evaporator shell and is arranged at the bottom of the shell, so that the cathode corrosion protection is realized under the condition that the surface of the corrosion-resistant coating of the evaporator shell is scratched or damaged; the observing hole is directly and fixedly connected with the outer wall of the evaporator shell, and the observing hole is provided with transparent organic glass, so that the distribution of sprayed seawater of the spray pipe bundle and the scaling degree of the outer wall of the heat exchange pipe can be observed; the invention has the characteristics of flexible installation and disassembly, high heat exchange efficiency, good steam-water separation effect, high space utilization rate, low cost and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a rear view of the present invention;
FIG. 3 is a schematic view in section taken along line A-A in FIG. 2;
FIG. 4 is a schematic view of a support frame structure according to the present invention;
FIG. 5 is a schematic view of the heat exchange tube structure of the present invention;
FIG. 6 is a schematic radial cross-sectional view of a heat exchange tube of the present invention;
wherein:
an effect body evaporator-1, an evaporator shell-11, a spray pipe-2, a heat exchange pipe-3, a demister-4, a heat exchange pipe support frame-8, a fresh water collecting pipeline-6, a salt water collecting pipe-9, a fresh water collecting box-14, an inlet pipe plate-17, an outlet pipe plate-16, a support frame-81, a connecting plate-82, a first support single frame-801, a second support single frame-802, a connecting short plate-803, an upper placing hole-804, a middle placing hole-805, a lower placing hole-806, a first steam baffle-171, a second steam baffle-172, a steam inlet-173, a non-condensed gas collecting port-18, a nozzle-21, an anti-scouring guide rod-13, a spiral fin-31 and a sacrificial anode-10, peep the observation hole-15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the installation methods and technical terms mentioned in the present invention are technical terms that are already clearly known in the technical field, and thus, the explanation thereof is not repeated. Moreover, the same reference numerals are used for the same components, which do not affect and should not constitute an exact understanding of the technical solutions for a person skilled in the art.
The first embodiment is as follows:
the invention relates to a heat exchange tube of a low-temperature multi-effect seawater desalination device and an evaporator formed by the same, wherein a plurality of effect body evaporators 1 are connected in series through connecting flanges, and each effect body evaporator 1 comprises: the evaporator comprises an evaporator shell 11, a spray pipe 2, heat exchange pipes 3, a demister 4, a heat exchange pipe support frame 8, a fresh water collecting pipeline 6, a saline water collecting pipe 9, a fresh water collecting tank 14, an inlet pipe plate 17 and an outlet pipe plate 16, wherein the evaporator shell 11 is internally provided with the heat exchange pipe support frame 8, the heat exchange pipe support frame 8 is fixedly connected with the evaporator shell 11, the heat exchange pipe support frame 8 is internally provided with a plurality of heat exchange pipes 3, two ends of the evaporator shell 11 are respectively provided with the inlet pipe plate 17 and the outlet pipe plate 16, the heat exchange pipes 3 are all fixed through the inlet pipe plate 17 and the outlet pipe plate 16, the outlet pipe plate 16 is provided with the fresh water collecting tank 14, the fresh water collecting tank 14 is provided with the fresh water collecting pipeline 6, the spray pipe 2 is arranged above the evaporator shell 11, the saline water collecting pipe 9 is arranged below the evaporator shell 11, the outlet end of the evaporator shell 11 is provided with the demister 4, and the demister 4 is a louver type steam demister, the function of the device is to effectively strip salt drops carried in steam, thereby ensuring the purity of the steam required by the next effect evaporator, and the outlet of the demister 4 is connected with the condenser.
The heat exchange tube support frame 8 includes: the evaporator shell 11 is of a cylindrical structure, three support frames 81 are arranged in the evaporator shell 11 in an axial linear array, every two adjacent support frames 81 are connected through the connecting plate 82, and the heat exchange tubes 3 are arranged in the support frames 81.
The support frame 81 includes: the heat exchanger comprises a first supporting single frame 801 and a second supporting single frame 802, wherein the evaporator shell 11 is internally provided with two first supporting single frames 801 and two second supporting single frames 802, the two first supporting single frames 801 and the two second supporting single frames 802 are symmetrically arranged along a vertical central line on the radial section of the evaporator shell 11, the adjacent first supporting single frames 801 and the second supporting single frames 802 are welded and fixed through connecting short plates 803, an upper placing hole 804, a middle placing hole 805 and a lower placing hole 806 are respectively arranged in the first supporting single frame 801 and the second supporting single frames 802, a plurality of heat exchange tubes 3 are respectively arranged in the upper placing hole 804, the middle placing hole 805 and the lower placing hole 806 in a staggered mode, the heat exchange tubes 3 are provided with a certain inclination angle to facilitate condensation water recovery, and the heat exchange tubes 3 in each placing hole can be independently disassembled and assembled, so that seawater is fully contacted with the heat exchange tubes, and the heat recovery efficiency is improved.
The heat exchange tubes 3 are all fixed between the inlet tube plate 17 and the outlet tube plate 16 through rubber grommet seals, the inlet tube plate 17 and the outlet tube plate 16 are both of a hollow structure, a first steam blocking plate 171 is arranged in the inlet tube plate 17, the first steam blocking plate 171 is located between the middle placing hole 805 and the lower placing hole 806, a second steam blocking plate 172 is arranged on the outlet tube plate 16, the second steam blocking plate 172 is located between the upper placing hole 804 and the middle placing hole 805, a steam inlet 173 is arranged on the inlet tube plate 17, and an outlet for collecting condensed water is arranged below the outlet tube plate 16.
The fresh water collecting tank 14 is communicated with the outlet tube plate 16, the communication part of the fresh water collecting tank 14 and the outlet tube plate 16 is positioned above the second steam baffle plate 172, the non-condensable gas collecting port 18 is arranged above the fresh water collecting tank 14, and the concentrated non-condensable gas mixture is discharged through the non-condensable gas collecting port 18, so that the non-condensable gas can affect the heat conduction efficiency and cause corrosion, and therefore, the non-condensable gas must be removed from the process.
Linear array is provided with a plurality of nozzles 21 on shower 2, a plurality of nozzles 21 and shower 2 demountable installation, the bottom surface level of every nozzle 21 arranges, so set up and avoid the uneven or heat exchange tube of scouring away of sea water distributed cooling, the pan feeding sea water distributes to the surface of heat exchange tube 3 and absorbs the latent heat of steam by nozzle 21 again via shower 2, the sea water after the concentration gathers the back through salt solution collecting pipe 9 and is gone into next effect group by middle feeding pump, be provided with scour prevention guide arm 13 between import tube sheet 17 and the export tube sheet 16, scour prevention guide arm 13 is located between nozzle 21 and heat exchange tube 3, installation scour prevention guide arm 13's effect lies in preventing to lead to lower part heat exchange tube 3 directly to be scoured and produce the erosion because of nozzle 21 distributes the uneven and mix with silt in the sea water.
The anti-scouring guide rod 13 is a hollow rod made of polyurethane material, a support rod made of glass fiber reinforced plastic is arranged in the anti-scouring guide rod 13, and the support rod provides rigidity for the anti-scouring guide rod 13.
The heat exchange tube 3 is internally provided with the spiral fins 31, the length of the spiral fins 31 on the inner wall of the heat exchange tube 3 is the largest at the upper part, the spiral fins are gradually reduced towards two sides until the length of the inner wall of the heat exchange tube 3 is reduced to zero, the space between the spiral fins can be freely adjusted according to specific conditions, the mode effectively increases the heat exchange area and improves the heat exchange efficiency of the heat exchange tube, meanwhile, the spiral structure of the inner wall is convenient for guiding and dredging steam airflow, improves the flowing uniformity of steam, and is also convenient for reducing low-resistance circulation of steam condensate water, the heat exchange tube 3 can be spliced on line in a split assembly mode, the whole through is realized through internal and external rotating threads, the thread sealing surface is provided with the rubber O-shaped ring, seawater is prevented from permeating into the heat exchange tube to influence the quality of desalinated, the limitation of the structural space of the effective body evaporator is avoided, and the technical problem that the whole replacement of the heat exchange tube bundle cannot be realized is solved.
The bottom of the evaporator shell 11 is fixedly provided with a sacrificial anode 10, and the sacrificial anode 10 is used for cathodic corrosion protection under the condition that the surface of the corrosion-resistant coating of the evaporator shell 11 is scratched or damaged.
Be provided with peep observation hole 15 on the evaporimeter casing 11, peep observation hole 15 and evaporimeter casing outer wall direct fixed connection, peep observation hole 15 and set up transparent organic glass, peep observation hole 15 and be used for observing shower 2 sprays sea water distribution condition and heat exchange tube outer wall scale deposit degree.
The working process is as follows:
steam enters the heat exchange tube bundle in the lower placing hole 806 from the steam inlet 173, then sequentially passes through the middle placing hole 805 and the upper placing hole 804 and finally reaches the fresh water collecting box 14, non-condensable gas in the steam is discharged from the non-condensable gas collecting port 18, the flow direction of the steam in the heat exchange tube bundle is shown by black arrows in fig. 3, seawater is sprayed out from the spray nozzles 21 through the spray pipes 2, the sprayed seawater is in heat energy conversion when contacting with the heat exchange tube bundle, the steam in the heat exchange tube bundle is condensed when encountering cold, condensed fresh water liquid is collected, the seawater absorbs the heat of the steam in the heat exchange tube bundle to generate partial steam, the newly generated steam enters the heat exchange tube bundle in the next effect evaporator, the concentrated seawater is discharged from the brine collecting pipe 9 and introduced into the spray pipes 2 of the next effect for reuse, and the multiple effect evaporators work in a circulating mode.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any minor modifications, equivalent replacements and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a heat exchange tube of low temperature multiple effect sea water desalination device and evaporimeter of constituteing thereof, a plurality of effect body evaporimeters (1) are established ties each other through flange, its characterized in that, effect body evaporimeter (1) includes: the device comprises an evaporator shell (11), spray pipes (2), heat exchange pipes (3), a demister (4), a heat exchange pipe support frame (8), a fresh water collecting pipeline (6), a salt water collecting pipe (9), a fresh water collecting box (14), an inlet pipe plate (17) and an outlet pipe plate (16), wherein the evaporator shell (11) is internally provided with the heat exchange pipe support frame (8), the heat exchange pipe support frame (8) is fixedly connected with the evaporator shell (11), the heat exchange pipe support frame (8) is internally provided with a plurality of heat exchange pipes (3), two ends of the evaporator shell (11) are respectively provided with the inlet pipe plate (17) and the outlet pipe plate (16), the heat exchange pipes (3) are fixed with the outlet pipe plate (16) through the inlet pipe plate (17), the outlet pipe plate (16) is provided with the fresh water collecting box (14), the fresh water collecting pipeline (6) is arranged on the fresh water collecting, a brine collecting pipe (9) is arranged below the inner part of the evaporator shell (11), a demister (4) is arranged at the outlet end of the evaporator shell (11), the demister (4) is a louver type steam demister, and the outlet of the demister (4) is connected with a condenser.
2. The heat exchange tube of the low-temperature multi-effect seawater desalination device and the evaporator comprising the same as claimed in claim 1, wherein the heat exchange tube support frame (8) comprises: the evaporator comprises supporting frames (81) and connecting plates (82), the evaporator shell (11) is of a cylindrical structure, three supporting frames (81) are arranged in the evaporator shell (11) along an axial linear array, every two adjacent supporting frames (81) are connected through the connecting plates (82), and heat exchange tubes (3) are arranged in the supporting frames (81).
3. The heat exchange tube of the low-temperature multi-effect seawater desalination plant and the evaporator comprising the same as claimed in claim 2, wherein the supporting frame (81) comprises: the evaporator comprises a first supporting single frame (801) and a second supporting single frame (802), wherein two first supporting single frames (801) and two second supporting single frames (802) are arranged in an evaporator shell (11), the two first supporting single frames (801) and the two second supporting single frames (802) are symmetrically arranged along a vertical central line on a radial section of the evaporator shell (11), the adjacent first supporting single frames (801) and the second supporting single frames (802) are welded and fixed through connecting short plates (803), an upper placing hole (804), a middle placing hole (805) and a lower placing hole (806) are arranged in each of the first supporting single frames (801) and the second supporting single frames (802), a plurality of heat exchange tubes (3) are arranged in the upper placing hole (804), the middle placing hole (805) and the lower placing hole (806) in a staggered mode, and the heat exchange tubes (3) in each placing hole can be independently disassembled and assembled.
4. The heat exchange tube of the low-temperature multi-effect seawater desalination device and the evaporator comprising the same as claimed in claim 3, wherein the heat exchange tube (3) is fixed between the inlet tube plate (17) and the outlet tube plate (16) in a sealing manner through rubber grommets, the inlet tube plate (17) and the outlet tube plate (16) are both of a hollow structure, a first steam baffle plate (171) is arranged in the inlet tube plate (17), the first steam baffle plate (171) is positioned between the middle placement hole (805) and the lower placement hole (806), a second steam baffle plate (172) is arranged on the outlet tube plate (16), the second steam baffle plate (172) is positioned between the upper placement hole (804) and the middle placement hole (805), and a steam inlet (173) is arranged on the inlet tube plate (17).
5. The heat exchange tube of the low-temperature multi-effect seawater desalination device and the evaporator comprising the same as claimed in claim 1, wherein the fresh water collection box (14) is communicated with the outlet tube plate (16), the communication position of the fresh water collection box (14) and the outlet tube plate (16) is located above the second steam baffle plate (172), and the non-condensable gas collection port (18) is arranged above the fresh water collection box (14).
6. The heat exchange tube of the low-temperature multi-effect seawater desalination device and the evaporator comprising the same as claimed in claim 1, wherein the spray tube (2) is provided with a plurality of nozzles (21) in a linear array, the plurality of nozzles (21) are detachably mounted with the spray tube (2), the bottom surface of each nozzle (21) is horizontally arranged, an anti-scouring guide rod (13) is arranged between the inlet tube plate (17) and the outlet tube plate (16), and the anti-scouring guide rod (13) is positioned between the nozzles (21) and the heat exchange tube (3).
7. The heat exchange tube of the low-temperature multi-effect seawater desalination plant and the evaporator comprising the same as claimed in claim 6, wherein the anti-scouring guide rod (13) is a hollow rod made of polyurethane material, and a support rod made of glass fiber reinforced plastic is arranged in the anti-scouring guide rod (13).
8. The heat exchange tube of the low-temperature multi-effect seawater desalination device and the evaporator comprising the same as claimed in claim 1, wherein the heat exchange tube (3) is internally provided with a helical fin (31), the length of the helical fin (31) on the inner wall of the heat exchange tube (3) is the largest at the upper part, the length of the helical fin is gradually reduced towards two sides until the length of the lowest point is reduced to zero, the heat exchange tube (3) can be spliced on line in a split assembly mode, the whole penetration is realized through internal and external rotating threads, and the thread sealing surface is provided with a rubber O-shaped ring.
9. The heat exchange tube of the low-temperature multi-effect seawater desalination device and the evaporator comprising the same as claimed in claim 1, wherein the bottom of the evaporator shell (11) is fixedly provided with a sacrificial anode (10).
10. The heat exchange tube of the low-temperature multi-effect seawater desalination device and the evaporator comprising the same as claimed in claim 1, wherein the evaporator shell (11) is provided with a peeping observation hole (15), the peeping observation hole (15) is directly and fixedly connected with the outer wall of the evaporator shell, the peeping observation hole (15) is provided with transparent organic glass, and the peeping observation hole (15) is used for observing the distribution of the sprayed seawater of the spray pipe (2) and the scaling degree of the outer wall of the heat exchange tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110349602.8A CN113149106A (en) | 2021-03-31 | 2021-03-31 | Heat exchange tube of low-temperature multi-effect seawater desalination device and evaporator formed by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110349602.8A CN113149106A (en) | 2021-03-31 | 2021-03-31 | Heat exchange tube of low-temperature multi-effect seawater desalination device and evaporator formed by same |
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| CN113149106A true CN113149106A (en) | 2021-07-23 |
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| CN202110349602.8A Pending CN113149106A (en) | 2021-03-31 | 2021-03-31 | Heat exchange tube of low-temperature multi-effect seawater desalination device and evaporator formed by same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804266A (en) * | 2022-05-18 | 2022-07-29 | 天津国投津能发电有限公司 | Falling film condenser of low-temperature multi-effect distillation seawater desalination system |
| CN114804268A (en) * | 2022-06-28 | 2022-07-29 | 天津国投津能发电有限公司 | Automatic waste heat adjusting and recycling device and method for low-temperature multi-effect distillation seawater desalination system |
-
2021
- 2021-03-31 CN CN202110349602.8A patent/CN113149106A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804266A (en) * | 2022-05-18 | 2022-07-29 | 天津国投津能发电有限公司 | Falling film condenser of low-temperature multi-effect distillation seawater desalination system |
| CN114804266B (en) * | 2022-05-18 | 2023-02-28 | 天津国投津能发电有限公司 | Falling film condenser of low-temperature multi-effect distillation seawater desalination system |
| CN114804268A (en) * | 2022-06-28 | 2022-07-29 | 天津国投津能发电有限公司 | Automatic waste heat adjusting and recycling device and method for low-temperature multi-effect distillation seawater desalination system |
| CN114804268B (en) * | 2022-06-28 | 2022-09-09 | 天津国投津能发电有限公司 | Automatic waste heat adjusting and recycling device and method for low-temperature multi-effect distillation seawater desalination system |
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