CN116007423A

CN116007423A - Direct contact-dividing wall type coupling heat exchanger

Info

Publication number: CN116007423A
Application number: CN202211621744.6A
Authority: CN
Inventors: 孙辉; 徐建新; 郝宏斌; 王�华; 蔡光程
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-04-25

Abstract

The invention discloses a direct contact-dividing wall type coupling heat exchanger, which comprises an outer box and an inner box, wherein the inner box is embedded and installed in the outer box, a sealing ring which is in sealing connection with the top end of the outer box is fixedly sleeved on the upper part of the outer wall of the inner box, a box cover which is in sealing connection with the sealing ring is installed at the top end of the inner box, cold flow inlets are symmetrically arranged at the top end of the box cover, and cold flow outlets are symmetrically arranged at the bottom end of the inner box; according to the invention, through coupling of direct contact heat exchange and dividing wall type heat exchange, the heat exchanger is provided with two heat exchange modes including direct contact heat exchange and dividing wall type heat exchange, so that the application range is enlarged, the use limitation is reduced, the stirring blades are driven by the stirring shaft to stir refrigerant fluid in the heat exchange process, so that the heat exchange efficiency is improved to a certain extent, and finally, the second motor drives the outer wall scraping plate and the inner wall scraping plate to scrape the scale on the outer wall and the inner wall of the inner box respectively, so that the heat exchanger has the function of scraping the scale on the dividing wall in the heat exchange process.

Description

Direct contact-dividing wall type coupling heat exchanger

Technical Field

The invention relates to the technical field of heat exchangers, in particular to a direct contact-dividing wall type coupling heat exchanger.

Background

Heat exchangers, also known as heat exchangers or heat exchange devices, are devices for transferring heat from a hot fluid to a cold fluid to meet specified process requirements, are an industrial application of convective heat transfer and thermal transfer, and can be classified in different ways according to the heat exchange process, and can be classified into three categories, namely a divided wall type, a direct contact type and a regenerative type (or called recuperative type), and can be classified into two categories, namely a compact type and a non-compact type according to the degree of compactness of the surface of the heat exchanger, wherein the divided wall type heat exchanger and the direct contact type heat exchanger are most widely used, the principle of the divided wall type heat exchanger is that a heat medium transfers heat to a cold medium through metal or nonmetal, and the principle of the direct contact type heat exchanger is that two mediums transfer heat mutually through contact, so that heat transfer is realized.

Most of the existing heat exchanger products have single functions, such as a direct contact type heat exchanger cannot be applied to occasions where fluids cannot be mixed mutually, so that the application range is limited, but the existing dividing wall type heat exchanger can only transfer heat from a heat medium to a refrigerant through metal or nonmetal, cannot be suitable for heat exchange occasions where fluids are allowed to be mixed mutually, is limited by the surface wall of a container, has low heat transfer coefficient, and causes lower heat exchange efficiency.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a direct contact-dividing wall type coupling heat exchanger, which solves the problems that most of the existing heat exchanger products are single in function, limited in application range, low in heat transfer coefficient and low in heat exchange efficiency.

In order to achieve the purpose of the invention, the invention is realized by the following technical scheme: the utility model provides a direct contact-dividing wall type coupling heat exchanger, includes outer case and inner box, the inner box gomphosis is installed in the outer incasement portion, inner box outer wall upper portion fixedly cup joints the sealing ring with outer case top sealing connection, inner box top installs the case lid with sealing ring sealing connection, case lid top symmetry is equipped with cold flow entry, inner box bottom symmetry is equipped with cold flow export, outer bottom symmetry is equipped with the butt joint export with cold flow export adaptation, case lid top symmetry is equipped with steam input pipe and blast pipe, two sets of the bottom of steam input pipe extends to the inside bottom of inner box and is connected with the ring for giving vent to anger jointly, the gas outlet has equally been seted up to ring for giving vent to anger top and bottom, case lid bottom symmetry is equipped with the (mixing) shaft through first motor drive rotation, two sets of all be equipped with the stirring leaf on the (mixing) shaft, outer case both sides are equipped with hot flow entry and hot flow export respectively, the inside both sides of outer case all are equipped with through the rotatory lead screw of second motor drive, two sets of common screw thread cup joints lifting ring on the lead screw, the inner wall and the outer wall of lifting ring and the outer wall are fixed with scraper blade respectively.

The further improvement is that: the outer box top is fixed with first sealing washer, sealing groove with first sealing washer adaptation has been seted up to the sealing ring bottom, the sealing ring top is fixed with the second sealing washer, the sealing groove with the second sealing washer adaptation has been seted up to the case lid bottom.

The further improvement is that: support blocks are fixed on two sides of the top end of the outer box, bolts penetrate through the support blocks in a sliding mode, and insertion holes matched with the bolts are formed in two sides of the sealing ring.

The further improvement is that: one side of the supporting block, which is close to the jack, is connected with a limiting spring movably sleeved on the bolt, and one end of the limiting spring, which is far away from the supporting block, is connected with a limiting block fixedly sleeved on the bolt.

The further improvement is that: the top ends of the two groups of stirring shafts penetrate through the box cover through sealing bearings and are connected with chain wheels, the top ends of one group of stirring shafts are connected with the output end of the first motor, and the two groups of chain wheels are connected with chains in a sleeved mode.

The further improvement is that: the outer bottom end fixing has the drive box, and the output of second motor runs through in the drive box through the bearing and is connected with the driving pulley, the driving pulley is equipped with two sets of, two sets of the bottom of lead screw all runs through in the drive box through sealed bearing and is connected with driven pulley, two sets of driven pulley respectively through drive belt and two sets of driving pulley transmission connection.

The further improvement is that: the bottom of cold flow export and the top sealing connection of butt joint export, the bottom mounting of cold flow export has the gomphosis pipe of inserting in the butt joint export, the outer wall of gomphosis pipe is laminated with the inner wall of butt joint export.

The further improvement is that: support columns are symmetrically fixed at the bottom end inside the outer box, the top ends of the support columns are in contact with the bottom end outside the inner box, supporting feet are symmetrically fixed at the bottom end outside the outer box, and the sealing ring is connected with the box cover through bolts.

The beneficial effects of the invention are as follows: the invention comprises an outer tank and an inner tank, wherein refrigerant fluid is input into the inner tank through a cold flow inlet, and heating medium fluid is input into the outer tank through a hot flow inlet, so that the heat exchange work between fluids is realized by taking the side wall of the inner tank as a partition wall, in addition, the refrigerant fluid is input into the inner tank through the cold flow inlet, high-temperature steam is input into an air outlet ring pipe through a steam input pipe and is discharged into the refrigerant fluid in the inner tank, so that the direct contact heat exchange work is realized, the heat exchanger simultaneously has two heat exchange modes including direct contact heat exchange and partition wall heat exchange, the application range is further widened, the use limitation is reduced, in addition, the stirring blades are driven by a stirring shaft in the heat exchange process to stir the refrigerant fluid, the heat exchange efficiency is improved to a certain extent, and finally, the second motor drives an outer wall scraping plate and an inner wall scraping plate respectively scrape the scale on the outer wall of the inner tank and the inner wall of the inner tank, so that the heat exchanger has the function of scraping the scale on the partition wall in the heat exchange process, and the heat exchange efficiency of the partition wall heat exchange work is prevented from being influenced.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a front cross-sectional view of the present invention;

FIG. 3 is an enlarged view of the invention at A;

FIG. 4 is a top view of the lift ring of the present invention;

fig. 5 is a cross-sectional view of a docking outlet of the present invention.

Wherein: 1. an outer case; 2. an inner box; 3. a seal ring; 4. a case cover; 5. a cold flow inlet; 6. a cold flow outlet; 7. a butt-joint outlet; 8. a steam input pipe; 9. an exhaust pipe; 10. an air outlet ring pipe; 11. a first motor; 12. a stirring shaft; 13. a hot fluid inlet; 14. a heat flow outlet; 15. a second motor; 16. a screw rod; 17. a lifting ring; 18. an outer wall scraper; 19. an inner wall scraper; 20. a first seal ring; 21. a second seal ring; 22. a support block; 23. a plug pin; 24. a jack; 25. a limit spring; 26. a limiting block; 27. a sprocket; 28. a chain; 29. a drive box; 30. a driving pulley; 31. a driven pulley; 32. a fitting tube; 33. and (5) supporting the column.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, this embodiment provides a direct contact-dividing wall type coupling heat exchanger, including a cylindrical outer case 1, an inner case 2 is mounted in the inner fitting of the outer case 1, a sealing ring 3 is fixedly sleeved on the upper portion of the outer wall of the inner case 2, the top end of the sealing ring 3 is in the same horizontal plane with the top end of the inner case 2, the bottom end of the sealing ring 3 is in sealing connection with the top end of the outer case 1, a case cover 4 is mounted on the top end of the inner case 2, the bottom end of the case cover 4 is in sealing connection with the bottom end of the sealing ring 3, the case cover 4 and the sealing ring 3 are fixedly connected through bolts symmetrically distributed around the case cover 4, cold flow inlets 5 are provided with two groups and symmetrically distributed on the front and rear sides of the top end of the case cover 4, cold flow outlets 6 for discharging the cold flow are provided on the bottom end of the inner case 2, the front and back sides of the bottom end of the outer box 1 are respectively provided with a butt joint outlet 7 for discharging refrigerant fluid, the top end of the butt joint outlet 7 is in sealed butt joint with the bottom end of the cold flow outlet 6, the top end of the box cover 4 is symmetrically provided with a steam input pipe 8 for high-temperature steam to enter the inner box 2 and an exhaust pipe 9 for discharging gas in the inner box 2, the bottom end of the inner box 2 is provided with an annular air outlet ring pipe 10, the bottom ends of the two groups of steam input pipes 8 are extended into the inner box 2 and are connected with the air outlet ring pipe 10, the top end and the bottom end of the air outlet ring pipe 10 are respectively provided with air outlets distributed in annular equal intervals, the refrigerant fluid is input into the inner box 2 through the cold flow inlet 5, the heat medium fluid is input into the outer box 1 through the hot flow inlet 14, thereby realizing heat exchange work between fluids by taking the side wall of the inner box 2 as a partition wall, and go out in the coolant fluid of ring pipe 10 and arranging in inner box 2 is given vent to anger to steam input pipe 8 with high temperature steam to realize the heat transfer work of direct contact, thereby make this heat exchanger possess including two kinds of heat transfer modes including direct contact and dividing wall formula heat transfer simultaneously, and then the range of application has been enlarged, be equipped with first motor 11 on case lid 4, case lid 4 bottom symmetry is equipped with (mixing) shaft 12, (mixing) shaft 12 passes through first motor 11 drive rotation, all be equipped with stirring leaf and mutually noninterfere on two sets of (mixing) shafts 12, through utilizing (mixing) shaft 12 to drive stirring leaf to stir coolant fluid in the heat transfer process, thereby improved its heat exchange efficiency to a certain extent, outer box 1 left side upper portion is equipped with heat flow inlet 13, outer box 1 right side lower part is equipped with heat flow outlet 14, the inside left and right sides of outer box 1 all is equipped with through second motor 15 drive rotatory lead screw 16, the common screw thread cup joints on two sets of lead screws 16 has gone up lift ring 17, the inner wall of lift ring 17 is equipped with the outer wall scraper blade 18 with the laminating with inner box 2 outer wall, the inner wall scraper blade 19 of inner wall 1 inner wall laminating, through second scraper blade 15 and scraper blade 19 and the scaling-off function in the heat transfer device is equipped with the heat transfer device of inner wall 1 and the heat transfer device of the inner wall of the inner box 2 is equipped with scaling in the heat transfer process to avoid scaling.

The outer box 1 top is fixed with round rubber material's first sealing washer 20, and sealing ring 3 top is fixed with round rubber material's second sealing washer 21, and sealing washer 3 bottom and case lid 4 bottom have been seted up respectively with the seal groove of first sealing washer 20 and second sealing washer 21 adaptation, realize the sealing connection of outer box 1 and sealing ring 3 and case lid 4 through first sealing washer 20 and second sealing washer 21, have guaranteed the leakproofness of its junction.

The left side and the right side of the top end of the outer box 1 are respectively fixed with a supporting block 22, the supporting blocks 22 are slidably penetrated with bolts 23 which can rebound, the two sides of the sealing ring 3 are respectively provided with jacks 24 which are matched with the bolts 23, the positioning and fixing of the sealing ring 3 and the inner box 2 are realized by inserting the bolts 23 into the jacks 24, one side, close to the jacks 24, of the supporting blocks 22 is connected with a limiting spring 25, the limiting spring 25 is movably sleeved on the bolts 23, one end, far away from the supporting blocks 22, of the limiting spring 25 is connected with a limiting block 26, the limiting block 26 is fixedly sleeved on the bolts 23, and the bolts 23 have the rebound and resetting functions through the action of the limiting spring 25.

The case lid 4 top is equipped with the transmission box, and the top of two sets of (mixing) shafts 12 all runs through to the transmission box in through sealed bearing and is connected with sprocket 27, and the output of first motor 11 runs through the transmission box through the bearing and is connected with the top that is located the (mixing) shaft 12 on right side, has cup jointed chain 28 jointly on two sets of sprockets 27 and is connected through the transmission of chain 28, drives right (mixing) shaft 12 through first motor 11 and rotates, and right (mixing) shaft 12 rethread sprocket 27 and chain 28 drive left (mixing) shaft 12 and rotate.

The outer box 1 bottom end-mounting has drive box 29, the output of second motor 15 runs through in the drive box 29 through the bearing and be connected with two sets of drive pulley 30 that are upper and lower symmetric distribution, the bottom of two sets of lead screws 16 all runs through in the drive box 29 through sealed bearing and be connected with respectively with the driven pulley 31 of two sets of drive pulley 20 position adaptation, two sets of driven pulley 31 pass through drive belt respectively and two sets of drive pulley 30 transmission connection, drive pulley 30 rotation through second motor 15, drive pulley 30 passes through drive belt again and drives driven pulley 29 rotation, thereby realize the rotation of lead screw 16.

The bottom end fixing of cold flow export 6 has the gomphosis pipe 32 of inserting in the butt joint export 7, and the outer wall of gomphosis pipe 32 is laminated with the inner wall of butt joint export 7, through the concatenation design with cold flow export 6 and butt joint export 7, avoids influencing inner box 2 and takes out.

Support columns 33 are symmetrically fixed at the bottom end inside the outer box 1, the inner box 2 is supported by the support columns 33, and support feet for providing stable support for the outer box 1 are symmetrically fixed at the bottom end outside the outer box 1.

When the heat exchange device is used, under the condition that heat medium and refrigerant fluid cannot be mixed with each other, the refrigerant fluid enters the inner box 2 from the cold flow inlet 5, meanwhile, the heat medium fluid enters the outer box 1 from the hot flow inlet 13, the side wall of the inner box 2 is used as a partition wall to realize heat exchange with the refrigerant fluid, the first motor 11 is started to drive the stirring shaft 12 to drive the stirring blade to stir the refrigerant fluid in the heat exchange process, the refrigerant fluid is enabled to uniformly contact the side wall of the inner box 2, the heat exchange efficiency is improved, the cold flow outlet 6 is utilized to discharge the refrigerant fluid from the inner box 2 after the heat exchange is finished, the heat flow outlet 14 is utilized to discharge the heat medium fluid, the second motor 15 is started to drive the screw rod 16 to rotate in the heat exchange process, the lifting ring 17 on the screw rod 16 is lifted, and the outer wall scraping plate 18 and the inner wall scraping plate 19 are respectively used for scraping scaling on the outer wall of the inner box 2 and the inner wall of the outer box 1;

under the condition that heat medium and refrigerant fluid can be mixed with each other, the refrigerant fluid enters the inner box 2 from the cold flow inlet 5, meanwhile, high-temperature steam is input into the air outlet ring pipe 10 from the steam input pipe 8 and is discharged into the refrigerant fluid in the inner box 2, heat exchange is realized, the first motor 11 is started in the heat exchange process to drive the stirring shaft 12 to drive the stirring blade to stir the refrigerant fluid, so that the refrigerant fluid is in more uniform contact with the high-temperature steam, the heat exchange efficiency is improved, the refrigerant fluid is discharged from the inner box 2 by the cold flow outlet 6 after the heat exchange is finished, and meanwhile, the gas is discharged by the exhaust pipe 9;

when the heat exchanger needs to clean the inner wall of the outer box 1 and the outer wall of the inner box 2 in the maintenance process, the plug pin 23 is pulled out of the jack 24, and then the inner box 2 is taken out of the outer box 1, namely, the outer box 1 and the inner box 2 are disassembled, so that convenience is brought to cleaning work of the outer box 1 and the inner box 2.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A direct contact-dividing wall type coupled heat exchanger, characterized in that: including outer case (1) and inner box (2), inner box (2) gomphosis is installed inside outer case (1), sealing ring (3) with outer case (1) top sealing connection have been fixedly cup jointed on inner box (2) outer wall upper portion, case lid (4) with sealing ring (3) sealing connection are installed on inner box (2) top, case lid (4) top symmetry is equipped with cold flow entry (5), inner box (2) bottom symmetry is equipped with cold flow outlet (6), outer case (1) bottom symmetry be equipped with butt joint export (7) with cold flow outlet (6) adaptation, case lid (4) top symmetry is equipped with steam input tube (8) and blast pipe (9), two sets of steam input tube (8)'s bottom extends to inner box (2) inside bottom and is connected with air outlet ring pipe (10) jointly, air outlet is seted up to air outlet ring pipe (10) top and bottom equivalent distance, case lid (4) bottom symmetry is equipped with through first motor (11) drive rotatory (12), two sets of stirring axle (12) on the stirring axle (1) bottom symmetry be equipped with impeller (1) and two sides respectively, heat flow inlet (16) both sides are equipped with respectively, heat flow inlet (16) are equipped with respectively, the two groups of screw rods (16) are sleeved with lifting rings (17) through common threads, and an outer wall scraping plate (18) and an inner wall scraping plate (19) are respectively fixed on the inner wall and the outer wall of the lifting rings (17).

2. The direct contact-dividing wall type coupled heat exchanger according to claim 1, wherein: the novel sealing device is characterized in that a first sealing ring (20) is fixed at the top end of the outer box (1), a sealing groove matched with the first sealing ring (20) is formed in the bottom end of the sealing ring (3), a second sealing ring (21) is fixed at the top end of the sealing ring (3), and a sealing groove matched with the second sealing ring (21) is formed in the bottom end of the box cover (4).

3. The direct contact-dividing wall type coupled heat exchanger according to claim 1, wherein: support blocks (22) are fixed on two sides of the top end of the outer box (1), bolts (23) penetrate through the support blocks (22) in a sliding mode, and jacks (24) matched with the bolts (23) are formed in two sides of the sealing ring (3).

4. A direct contact-dividing wall type coupled heat exchanger according to claim 3, wherein: one side of the supporting block (22) close to the jack (24) is connected with a limiting spring (25) movably sleeved on the bolt (23), and one end of the limiting spring (25) away from the supporting block (22) is connected with a limiting block (26) fixedly sleeved on the bolt (23).

5. The direct contact-dividing wall type coupled heat exchanger according to claim 1, wherein: the top ends of the two groups of stirring shafts (12) penetrate through the box cover (4) through sealing bearings and are connected with chain wheels (27), the top ends of one group of stirring shafts (12) are connected with the output end of the first motor (11), and the two groups of chain wheels (27) are connected with chains (28) in a sleeved mode.

6. The direct contact-dividing wall type coupled heat exchanger according to claim 1, wherein: the outer box (1) bottom is fixed with driving box (29), and the output of second motor (15) runs through to in driving box (29) and is connected with driving pulley (30) through the bearing, driving pulley (30) are equipped with two sets of, two sets of the bottom of lead screw (16) all runs through to in driving box (29) and is connected with driven pulley (31) through sealed bearing, two sets of driven pulley (31) respectively through driving belt with two sets of driving pulley (30) transmission connection.

7. The direct contact-dividing wall type coupled heat exchanger according to claim 1, wherein: the bottom of cold flow export (6) is connected with the top sealing of butt joint export (7), the bottom mounting of cold flow export (6) has gomphosis pipe (32) of inserting in butt joint export (7), the outer wall of gomphosis pipe (32) is laminated with the inner wall of butt joint export (7).

8. The direct contact-dividing wall type coupled heat exchanger according to claim 1, wherein: support columns (33) are symmetrically fixed at the bottom end inside the outer box (1), the top ends of the support columns (33) are in contact with the bottom end outside the inner box (2), support feet are symmetrically fixed at the bottom end outside the outer box (1), and the sealing ring (3) and the box cover (4) are connected through bolt installation.