CN111504096A - Straight-through phase change heat exchange device - Google Patents

Abstract

A straight-through phase change heat exchange device belongs to the technical field of energy environmental protection. The invention solves the problems that the existing phase change heat exchange device is too large in size and inconvenient to transport, assemble and disassemble. A straight-through type phase change heat exchange device comprises N straight-through type phase change heat exchange monomers, wherein N is larger than or equal to 1, each straight-through type phase change heat exchange monomer comprises a sealed shell, a cavity structure is formed in the shell, a vacuum pump is arranged in the shell in a communicated mode, the interior of the shell is vacuumized through the vacuum pump, a heat exchange tube bundle is arranged on the upper portion of the cavity structure, a flash evaporation chamber is formed in the lower portion of the cavity structure under the action of the vacuum pump and the heat exchange tube bundle, liquid to be flashed enters the flash evaporation chamber through a pipeline in a communicated mode to be flashed, steam obtained after flashing upwards moves to the upper portion of the cavity structure and exchanges heat with. This application has single effect or multiple-effect flash distillation function, and the flash distillation steam upward movement has effectively reduced phase transition heat transfer device's area, compares with prior art, the transportation loading and unloading of being more convenient for.

Description

Straight-through phase change heat exchange device

Technical Field

The invention relates to a straight-through phase-change heat exchange device, and belongs to the technical field of energy environmental protection.

Background

The phase change heat exchange devices of the prior art generally comprise: flash vessel, condenser, vacuum system, control system and some connecting lines. The principle of the phase change heat exchange device is that the flash evaporation steam generated by utilizing the flash evaporation principle of low-temperature waste hot water under the vacuum condition enters a condenser to heat the heating circulating water, and then the heating circulating water heats the surrounding buildings. The basic function is to flash the low-temperature water, and the utilization of the heat of the flash steam is suitable for heating; in addition, the effect of reducing the industrial wastewater can be achieved by utilizing the concentration effect of flash evaporation on the industrial wastewater.

The phase change heat transfer device among the prior art is generally too big, and flash vessel and condenser all are independent equipment, and flash vessel and condenser arrange for controlling mostly, and the middle steam passage intercommunication through pipy leads to phase change heat transfer device area and volume all too big, and the transportation loading and unloading of being not convenient for, and is limited because of the inside place of most mills or enterprises, leads to its popularization and application to receive the influence.

Disclosure of Invention

The invention provides a straight-through type phase change heat exchange device, aiming at solving the problems that the existing phase change heat exchange device is too large in size and inconvenient to transport, assemble and disassemble.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a straight-through type phase-change heat exchange device comprises N straight-through type phase-change heat exchange monomers, wherein N is larger than or equal to 1, each straight-through type phase-change heat exchange monomer comprises a sealed shell, a cavity structure is formed in each shell, a vacuum pump is arranged in each shell in a communicated mode, the interior of each shell is vacuumized through the vacuum pump, a heat exchange tube bundle is arranged on the upper portion of each cavity structure, a flash evaporation chamber is formed in the lower portion of each cavity structure under the action of the vacuum pump and the heat exchange tube bundle, liquid to be flashed enters the flash evaporation chamber through a pipeline in a communicated mode to be flashed, steam obtained after flash evaporation moves upwards to the upper portion of each cavity structure and exchanges heat with liquid to be heated in the heat exchange tube bundles, the temperature of the liquid to be heated in the heat exchange tube bundles rises, a liquid.

Furthermore, the straight-through phase-change heat exchange monomer further comprises a vertically arranged spray pipe, liquid to be flashed enters the flash chamber through the spray pipe, the bottom end of the spray pipe is located in the flash chamber of the straight-through phase-change heat exchange monomer, and the top end of the spray pipe is an inlet for the liquid to be flashed.

Further, when N is larger than or equal to 2, the N straight-through phase-change heat exchange monomers are sequentially communicated and arranged from the first effect to the Nth effect from top to bottom, and a liquid outlet to be flashed in the previous effect is communicated with a liquid inlet to be flashed in the next effect.

Further, the liquid outlet of waiting to flash is located the bottom of casing, and the liquid outlet intercommunication that waits to flash in the Nth is provided with and waits to flash liquid outlet pipe.

Further, the spray pipe is of a conical pipe structure or a straight pipe structure.

Further, a demister is horizontally arranged in the middle of the cavity structure in the shell.

Furthermore, a water collecting device is arranged between the heat exchange tube bundle and the demister to collect steam condensate water, and a steam channel is formed in the water collecting device.

Further, a support is fixedly arranged at the bottom of the casing positioned at the lowest part, and the support is used for realizing the fixed installation of the casing relative to the ground.

Furthermore, two confluence channels are arranged at the upper part of the shell, when N is equal to 1, one end of the heat exchange tube bundle is communicated with the liquid inlet pipe of the liquid to be heated through one confluence channel, and the other end of the heat exchange tube bundle is communicated with the liquid supply pipe of the liquid to be heated through the other confluence channel; when N is larger than or equal to 2, one confluence channel in the Nth effect is communicated with a liquid inlet pipe of the liquid to be heated, two confluence channels positioned on the same side in each two adjacent effects are respectively communicated through a conveying pipe of the liquid to be heated, and the other confluence channel in the first effect is communicated with a liquid supply pipe of the liquid to be heated.

Furthermore, the heat exchange tube bundles are divided into two groups and are respectively positioned on two sides of the spray pipe, and each group of heat exchange tube bundles comprises a plurality of heat exchange straight tubes which are parallel to each other.

Further, the heat exchange tube bundle comprises at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are sequentially coaxial from inside to outside and are horizontally arranged outside the spray pipe.

Compared with the prior art, the invention has the following effects:

through-type phase transition heat transfer monomer in this application is through arranging heat exchanger tube bank and flash chamber in same casing, make treat that flash distillation liquid can realize flash distillation and heat transfer in a casing, and, arrange the realization flash distillation about being heat exchanger tube bank and flash chamber, the steam upward movement that obtains after the flash distillation, compare through solitary steam passageway intercommunication with solitary condenser among the prior art and solitary flash vessel, the heat transfer effect is better, and effectively reduced phase transition heat transfer device's volume and area, system cost is lower, and integrative structure effectively reduces the construction cycle, the transportation loading and unloading of being more convenient for, manufacturing cost is greatly reduced also. The limited bearing degree of the inner site of a factory or an enterprise and the like is reduced.

Compared with a phase-change heat exchange device with the same heat exchange capacity in the prior art, the phase-change heat exchange device has the advantage that the heat exchange efficiency is improved by nearly two times.

The single-effect or multi-effect flash evaporation function is provided, the straight-through type phase change heat exchange monomer can be used as the single-effect phase change heat exchange device, when multi-effect flash evaporation is needed, because each effect is of a monomer structure, a plurality of straight-through type phase change heat exchange monomers are overlapped and fixedly connected, and the installation is more convenient.

Drawings

Fig. 1 is a schematic main sectional view of a single-effect straight-through phase-change heat exchanger with N ═ 1 (in the case that the heat exchange tube bundle includes a plurality of heat exchange straight tubes);

fig. 2 is a schematic side sectional view of a single-effect straight-through phase-change heat exchanger with N ═ 1 (in the case where the heat exchanger bundle includes several heat exchanger straight pipes);

fig. 3 is a schematic top view of a single-effect straight-through phase-change heat exchanger with N ═ 1 (in the case of a heat exchanger bundle comprising several heat exchanger straight pipes);

fig. 4 is a main sectional view of the multi-effect straight-through phase-change heat exchange device when N is 3 (in the case that the heat exchange tube bundle comprises a plurality of heat exchange straight tubes);

fig. 5 is a schematic front view of the multi-effect straight-through phase-change heat exchange device when N is 3 (in the case that the heat exchange tube bundle includes a plurality of heat exchange straight tubes);

fig. 6 is a schematic main sectional view of a single-effect straight-through phase-change heat exchanger with N ═ 1 (in the case where the heat exchanger bundle includes several heat exchanger bends);

fig. 7 is a schematic side cross-sectional view of a single-effect, straight-through phase-change heat exchange device with N ═ 1 (in the case where the heat exchange tube bundle includes several heat exchange bends);

fig. 8 is a schematic top view of a single-effect, straight-through phase-change heat exchanger with N ═ 1 (in the case where the heat exchanger bundle includes several heat exchanger bends);

fig. 9 is a schematic main sectional view of the multi-effect straight-through phase-change heat exchanger with N-3 (in case the heat exchanger tube bundle includes several heat exchanger bent tubes);

fig. 10 is a schematic front view of the multi-effect straight-through phase-change heat exchanger with N equal to 3 (in case the heat exchange tube bundle includes several heat exchange bent tubes).

Detailed Description

The first embodiment is as follows: the embodiment is described by combining fig. 1-10, a straight-through phase-change heat exchange device, which comprises N straight-through phase-change heat exchange monomers, wherein N is greater than or equal to 1, each straight-through phase-change heat exchange monomer comprises a sealed shell (1), the shell (1) is in a cavity structure, the shell (1) is communicated with a vacuum pump (19), the inside of the shell (1) is vacuumized through the vacuum pump (19), a heat exchange tube bundle (3) is arranged at the upper part of the cavity structure, the lower part of the cavity structure forms a flash evaporation chamber (2) through the action of the vacuum pump (19) and the heat exchange tube bundle (3), liquid to be flashed enters the flash evaporation chamber (2) through a pipeline for flash evaporation, steam obtained after flash evaporation moves upwards to the upper part of the cavity structure and exchanges heat with liquid to be heated in the heat exchange tube bundle (3), so that the temperature of the liquid to be heated in, the shell (1) is provided with a liquid outlet (9) to be flashed, and the liquid to be flashed after flashing flows out through the liquid outlet (9) to be flashed.

The direct-through phase change heat exchange device is a single-effect direct-through phase change heat exchange device when N is 1 or more, and is a multiple-effect direct-through phase change heat exchange device when N is more than or equal to 2, wherein N can be realized, the larger the value of N is, the higher the height of the flash evaporation device is, the higher the manufacturing cost is, and N is preferably more than or equal to 1 and less than or equal to 6.

The liquid to be flashed is preferably a liquid to be flashed at a medium-high temperature of 30-95 ℃, and can also be a liquid to be flashed in any other temperature range.

Before the liquid to be flashed enters each effect flash chamber (2), vacuumizing the interior of the shell (1) through a vacuum pump (19), allowing the liquid to be flashed to enter the interior of the first effect flash chamber for flash evaporation, wherein the pressure in the flash chamber is lower than the saturated vapor pressure of the water temperature of the liquid to be flashed, the liquid to be flashed is subjected to flash evaporation immediately, the obtained vapor is subjected to heat exchange with the liquid to be heated in the first effect heat exchange tube bundle along a spatial pressure gradient, the vapor is condensed, and the liquid to be heated flows out after being heated to supply heat to a heat user or flow to a cooling tower or realize other purposes;

the vacuum pump referred to in this application may be any device that can achieve evacuation of the interior of the housing. Which is preferably arranged in communication in the upper part of the housing.

When N is more than or equal to 2, the residual liquid to be flashed after the first effect flash evaporation downwards enters the flash evaporation chamber in the second effect, the liquid is flashed again, the generated steam upwards exchanges heat with the heat exchange tube bundle in the second effect, the residual liquid to be flashed after the flash evaporation enters the flash evaporation chamber in the third effect and is flashed again, the generated steam upwards exchanges heat with the heat exchange tube bundle in the third effect, and the residual liquid to be flashed continuously flashes downwards until the last effect flash evaporation is finished. Discharging the residual liquid to be flashed through a liquid outlet at the bottom;

the upper side wall of the shell in each effect is provided with a water discharge port and an air discharge port, and the water discharge port and the air discharge port are condensed water and non-condensed air discharge channels on the steam side in the shell.

Steam condensate water generated at the upper part of the cavity in the shell of each effect is discharged into a condensate water tank 18 through a condensate pipe 17 and a water pump, and non-condensable gas generated in the shell of each effect is discharged through a vacuum pump 19.

The number of water pumps and the number of vacuum pumps are not limited in this application, for example: each effect can be independently provided with a water pump for discharging condensed water and a vacuum pump for vacuumizing and discharging non-condensable gas; the N effect can be used for simultaneously sharing one water pump for discharging condensed water, and simultaneously sharing one vacuum pump for vacuumizing and discharging non-condensable gas.

The liquid to be heated flows from bottom to top through the heat exchange tube bundles from the N-th effect to the first effect in sequence, exchanges heat with steam through the heat exchange tube bundles, flows out from the upper part after being heated to supply heat to a heat user or flows to a cooling tower or other purposes.

The liquid to be heated in the heat exchange tube bundle is heated, and the steam outside the tube is condensed to release heat.

The liquid to be heated and the steam are subjected to countercurrent heat exchange, the low-temperature liquid to be heated returned from a heat user enters the heat exchange tube bundle in the N effect from the liquid inlet pipe 14 of the liquid to be heated in the N effect, the liquid enters the heat exchange tube bundle in the N-1 effect through the conveying pipe 15 of the liquid to be heated after being heated, the liquid enters the heat exchange tube bundle in the N-2 effect through the conveying pipe 15 of the liquid to be heated after being heated, the process is circulated until the liquid enters the heat exchange tube bundle in the first effect, and the liquid is output through the liquid supply pipe 13 of the liquid to be heated after being heated and heated to be supplied to the heat user.

This application has multiple-effect flash distillation function, and the heat exchanger tube bank in each effect all is intercommunication about with flash chamber (2) and arranges, and the steam upward movement that obtains after the flash distillation has effectively reduced phase transition heat transfer device's volume, compares with prior art, and the transportation loading and unloading of being more convenient for has reduced the limited bearing degree such as mill or the inside place of enterprise.

The through type phase change heat transfer monomer in this application can the exclusive use, also can a plurality of through type phase change heat transfer monomers superpose the intercommunication each other and use to realize the integration of system.

The housing in each effect is preferably a box-like structure of six panels. )

The straight-through type phase change heat exchange monomer further comprises a vertically arranged spray pipe (4), liquid to be flashed enters the flash chamber through the spray pipe (4), the bottom end of the spray pipe (4) is located in the flash chamber of the straight-through type phase change heat exchange monomer, and the top end of the spray pipe (4) is an inlet for the liquid to be flashed. The liquid to be flashed enters the flash chamber through the liquid to be flashed water inlet pipe 16 and the liquid to be flashed inlet, the flash steam enters the upper part of the cavity structure, and the liquid to be heated is heated through heat exchange of the heat exchange pipe bundle (3). Spray tube (4) are one section nozzle stub through thermodynamic calculation, because of dissolving in the liquid of treating the flash distillation has easy crystalline substance or contains solid impurity, in order to guarantee to treat that the flash distillation liquid gets into the flash chamber smoothly, design spray tube (4) for tubular structure, compare with the mode that adopts the spray thrower to spray and adopt the water distribution plate to carry out the water distribution among the prior art, effectively avoid the emergence of jam problem, and then effectively prolong and wash the maintenance cycle, and under flash distillation negative pressure state through the spray tube, the water column can be the blasting form dispersion, can realize better water distribution and flash evaporation effect than prior art.

When N is more than or equal to 2, the N straight-through phase-change heat exchange monomers are sequentially communicated from the top down to be arranged from the first effect to the Nth effect, and the liquid outlet (9) to be flashed in the previous effect is communicated with the liquid inlet to be flashed in the next effect. (so designed, the top end of the spray pipe in the second effect to the Nth effect is preferably positioned on the same plane with the bottom end of the flash chamber in the previous effect, and water in the flash chamber in the previous effect is avoided.)

The outlet (9) for the liquid to be flashed is positioned at the bottom end of the shell (1). And a liquid outlet (9) to be flashed in the Nth effect is communicated with a liquid outlet pipe (10) to be flashed.

The spray pipe (4) is of a conical pipe structure or a straight pipe structure.

The middle part of the cavity structure in the shell (1) is horizontally provided with a demister (5). (so design, the upper portion of cavity structure and lower part through defroster (5) intercommunication, defroster (5) horizontal arrangement effectively increases defogging area, can filter out tiny water droplet, droplet and other non-vapour state material etc. in the flash steam through the defroster

A water collecting device (6) is arranged between the heat exchange tube bundle (3) and the demister (5) to collect steam condensate, and a steam channel (7) is formed in the water collecting device (6). (by such design, the water collecting device (6) can be any device capable of collecting condensed water in the prior flash evaporation technology, steam directly enters the upper part of the shell (1) through the steam channel (7) for heat exchange, the water collecting device preferably comprises a water collecting disc 20 and a water collecting tank (8), the water collecting disc 20 is in a cone-shaped structure, is sleeved outside the spray pipe (4) and has a gap with the outer wall of the spray pipe (4), the gap is the steam channel (7), the water collecting tank (8) is an annular through groove, the large end of the water collecting disc 20 is a low-level end and is positioned above the water collecting tank (8), liquid collected by the water collecting disc 20 flows to the water collecting tank (8), the water collecting tank 8 is communicated with an external condensed water pipe 17, condensed water collected by the water collecting tank enters the condensed water tank 18 through the condensed water pipe 17, the annular structure of the water collecting tank (8) is arranged along with the integral structure of the straight-through type phase change heat exchange, if the cross section of the straight-through phase-change heat exchange monomer is of a rectangular structure, the water collecting tank (8) is of a rectangular ring structure, and if the cross section of the straight-through phase-change heat exchange monomer is of a circular structure, the water collecting tank (8) is of a circular ring structure. )

And a bracket (11) is fixedly arranged at the bottom of the lowest shell (1), and the bracket (11) is fixedly arranged relative to the ground. (so design, can also effectively avoid remaining wait to flash distillation liquid through the liquid export (9) of waiting to flash distillation of bottom and external drain pump when discharging, cavitation that probably takes place in the water pump, and then guarantee that the remaining liquid of waiting to flash distillation discharges smoothly.)

Two confluence channels (12) are uniformly distributed at the upper part of the shell (1), when N is equal to 1, one end of the heat exchange tube bundle (3) is communicated with the liquid inlet pipe (14) of the liquid to be heated through one confluence channel, and the other end of the heat exchange tube bundle (3) is communicated with the liquid supply pipe (13) of the liquid to be heated through the other confluence channel; when N is more than or equal to 2, one confluence channel in the Nth effect is communicated with a liquid inlet pipe (14) of the liquid to be heated, two confluence channels positioned on the same side in each two adjacent effects are respectively communicated through a conveying pipe (15) of the liquid to be heated, and the other confluence channel in the first effect is communicated with a liquid supply pipe (13) of the liquid to be heated. (so designed, the liquid to be heated sequentially passes through the liquid inlet pipe (14) and the liquid conveying pipe (15) of the liquid to be heated and finally flows out through the liquid supply pipe (13) of the liquid to be heated.)

The second embodiment is as follows: as shown in figures 1-10, when the spray pipes (4) are vertically arranged, the demister (5) is sleeved at the bottom of the spray pipes (4). Other components and connection relations are the same as those of the first embodiment.

The third concrete implementation mode: as shown in fig. 1 to 5, the heat exchange tube bundles (3) in each effect are equally divided into two groups and respectively located at two sides of the spray pipe (4), and each group of heat exchange tube bundles (3) comprises a plurality of heat exchange straight pipes which are parallel to each other.

The fourth concrete implementation mode: as shown in FIGS. 6-10, each heat exchange tube bundle (3) in each effect comprises at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are sequentially coaxial from inside to outside and horizontally arranged outside the spray tube (4). (so designed, each heat exchange elbow is of an annular structure.)

The fifth concrete implementation mode: as shown in fig. 1 to 10, when the value of N is 3, the liquid to be flashed enters the flash chamber in the first effect 101 to be flashed, and because the pressure in the flash chamber is lower than the saturated vapor pressure of the water temperature of the liquid to be flashed, the liquid to be flashed is flashed and evaporated immediately, the obtained vapor exchanges heat with the liquid to be heated in the heat exchange tube bundle in the first effect 101 along the spatial pressure gradient, the vapor is condensed, and the liquid to be heated is heated;

the residual liquid to be flashed after the flash evaporation of the first effect 101 downwards enters a flash evaporation chamber in the second effect 102, the liquid is flashed again, the generated steam upwards exchanges heat with the heat exchange tube bundle in the second effect 102, the residual liquid to be flashed after the flash evaporation enters a flash evaporation chamber in the third effect 103 and is flashed again, and the generated steam upwards exchanges heat with the heat exchange tube bundle in the third effect 103. The residual liquid to be flashed is discharged through a liquid outlet at the bottom and an externally connected drainage pump.

The steam condensate generated in each effect is correspondingly discharged through a water pump, and the non-condensable gas in the steam is correspondingly discharged through a vacuum pump.

The liquid to be heated flows through the heat exchange tube bundle from the N-th effect 103 to the first effect in turn from bottom to top, exchanges heat with steam through the heat exchange tube bundle, and flows out from the upper part after being heated up to be supplied to a heat user. The liquid feeding pipe (13) for the liquid to be heated is communicated with one confluence channel in the first effect 101, the other confluence channel in the first effect 101 is communicated with one confluence channel in the second effect, the other confluence channel in the second effect 102 is communicated with one confluence channel in the third effect 103 through two conveying pipes (15) for the liquid to be heated, the liquid feeding pipe (14) for the liquid to be heated is communicated with the other confluence channel (12) in the third effect 103, and the liquid to be heated sequentially passes through the liquid feeding pipe (14) for the liquid to be heated and the two conveying pipes (15) for the liquid to be heated, and finally flows out through the liquid feeding pipe (13) for the liquid to be heated to be supplied to a heat user. Other components and connection relationships are the same as those in the first, second, third or fourth embodiment.

Claims (11)

1. A straight-through phase change heat exchange device is characterized in that: it comprises N straight-through phase change heat exchange devices, wherein N is more than or equal to 1, each straight-through phase change heat exchange monomer comprises a sealed shell (1), the shell (1) is internally of a cavity structure, the shell (1) is communicated with a vacuum pump (19), through vacuum pump (19) with casing (1) inside evacuation, and cavity structure's upper portion has arranged heat exchanger tube bank (3), vacuum pump (19) and heat exchanger tube bank (3) are passed through to cavity structure's lower part effect formation flash distillation chamber (2), treat that the flash distillation liquid passes through the pipeline intercommunication and gets into flash distillation chamber (2) in carry out the flash distillation, the steam upward movement that obtains after the flash distillation carries out the heat transfer to cavity structure's upper portion and with the heat exchanger tube bank (3) in the liquid of treating the heating, make in the heat exchanger tube bank (3) the liquid temperature of treating the heating rise, it remains flash distillation liquid outlet (9) to set up on casing (1), the liquid of treating after the flash distillation flows through treating flash distillation liquid outlet (9).

2. A flow-through phase-change heat transfer device according to claim 1, wherein: the straight-through type phase change heat exchange monomer further comprises a vertically arranged spray pipe (4), liquid to be flashed enters the flash chamber through the spray pipe (4), the bottom end of the spray pipe (4) is located in the flash chamber of the straight-through type phase change heat exchange monomer, and the top end of the spray pipe (4) is an inlet for the liquid to be flashed.

3. A flow-through phase-change heat transfer device according to claim 2, wherein: when N is more than or equal to 2, the N straight-through phase-change heat exchange monomers are sequentially communicated from the top down to be arranged from the first effect to the Nth effect, and the liquid outlet (9) to be flashed in the previous effect is communicated with the liquid inlet to be flashed in the next effect.

4. A flow-through phase change heat transfer device according to claim 2 or 3, wherein: the liquid outlet (9) to be flashed is positioned at the bottom end of the shell (1), and the liquid outlet (9) to be flashed in the Nth effect is communicated with a liquid outlet pipe (10) to be flashed.

5. A flow-through phase-change heat transfer device according to claim 4, wherein: the spray pipe (4) is of a conical pipe structure or a straight pipe structure.

6. A flow-through phase change heat transfer device according to claim 2, 3 or 5, wherein: a demister (5) is horizontally arranged in the middle of the cavity structure in the shell (1).

7. A flow-through phase-change heat transfer device according to claim 6, wherein: a water collecting device (6) is arranged between the heat exchange tube bundle (3) and the demister (5) to collect steam condensate, and a steam channel (7) is formed in the water collecting device (6).

8. A flow-through phase change heat exchange device according to claim 1, 2, 3, 5 or 7, wherein: and a bracket (11) is fixedly arranged at the bottom of the lowest shell (1), and the bracket (11) is fixedly arranged relative to the ground.

9. A flow-through phase change heat transfer device according to claim 2, 3, 5 or 7, wherein: two confluence channels (12) are arranged at the upper part of the shell (1), when N is equal to 1, one end of the heat exchange tube bundle (3) is communicated with the liquid inlet pipe (14) of the liquid to be heated through one confluence channel, and the other end of the heat exchange tube bundle (3) is communicated with the liquid supply pipe (13) of the liquid to be heated through the other confluence channel; when N is more than or equal to 2, one confluence channel in the Nth effect is communicated with a liquid inlet pipe (14) of the liquid to be heated, two confluence channels positioned on the same side in each two adjacent effects are respectively communicated through a conveying pipe (15) of the liquid to be heated, and the other confluence channel in the first effect is communicated with a liquid supply pipe (13) of the liquid to be heated.

10. A flow-through phase-change heat transfer device according to claim 9, wherein: the heat exchange tube bundles (3) are divided into two groups and are respectively positioned on two sides of the spray pipe (4), and each group of heat exchange tube bundles (3) comprises a plurality of heat exchange straight pipes which are parallel to each other.

11. A flow-through phase-change heat transfer device according to claim 9, wherein: the heat exchange tube bundle (3) comprises at least one heat exchange tube layer, and each heat exchange tube layer comprises heat exchange bent tubes which are sequentially coaxial from inside to outside and are horizontally arranged outside the spray pipe (4).

Images