CN216592958U

CN216592958U - Baffle ring of baffle rod heat exchanger

Info

Publication number: CN216592958U
Application number: CN202122844361.2U
Authority: CN
Inventors: 周军
Original assignee: Shandong Zenno Chemical Equipment Co ltd
Current assignee: Shandong Zenno Chemical Equipment Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-05-24
Anticipated expiration: 2031-11-19

Abstract

The utility model discloses a deflecting ring of a deflecting rod heat exchanger, which comprises a support lug and a tube bundle, wherein a tube plate is fixedly arranged outside the support lug, a first distance tube is arranged inside the tube plate, a framework is arranged outside the first distance tube, a pull rod is arranged at the upper end of the first distance tube, a nut is arranged at the top of the pull rod, a floating tube plate is arranged at the top of the nut, the tube bundle is positioned inside the floating tube plate, a sliding plate is arranged at the right end outside the nut, a first deflecting ring is arranged at the lower end outside the pull rod, and a second deflecting ring is arranged at the lower end of the first deflecting ring. The baffle ring of the baffle rod heat exchanger enhances the disturbance of fluid due to the baffle rod, reduces the flow dead zone and leakage loss when the baffle rod transversely sweeps the tube bundle, and strengthens the heat exchange of the shell side, namely the heat exchange coefficient of the shell side is not lower than that of the transverse sweeping, and the heat transfer coefficient can be improved by 15-50% depending on the conditions of medium, flow speed, phase change and the like of the shell side.

Description

Baffle ring of baffle rod heat exchanger

Technical Field

The utility model relates to the field of shell-and-tube heat exchangers used in petroleum, chemical, coal chemical, electric power and other industries, in particular to a baffle ring of a baffle rod heat exchanger.

Background

The shell-and-tube heat exchanger is formed by connecting a tube with a tube plate and then fixing the tube with a shell, and has various structural types, such as a fixed tube plate type, a floating head type, a U-shaped tube type and the like. Typical shell and tube heat exchangers of various types are comprised of headers, tube sheets, baffles and a shell, wherein the baffles serve to 1) serve as support structures for the tubes and 2) increase the velocity of the shell side fluid and sweep the fluid across the tube bundle, thereby enhancing shell side heat transfer. Since the partition serves as a baffle, it is often also referred to as a baffle, and the corresponding heat exchanger is also referred to as a baffle heat exchanger.

The baffle plate heat exchanger in the market has the problems of induced vibration, heat exchanger damage, flow dead zone and leakage flow, and the actual heat transfer effect is far lower than the theoretical value and the flow resistance of the shell side is large.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a baffle ring of a rod baffle heat exchanger to solve the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a baffling circle of baffling pole heat exchanger, includes journal stirrup and tube bank, the outside fixed mounting of journal stirrup has the tube sheet, and the inside of tube sheet is provided with first distance tube, the externally mounted of first distance tube has the skeleton, the upper end of first distance tube is provided with the pull rod, and the top of pull rod installs the nut, the tube sheet that floats is installed at the top of nut, the tube bank is located the inside of unsteady tube sheet, the outside right-hand member of nut is provided with the slide, first baffling circle is installed to the outside lower extreme of pull rod, and the lower extreme of first baffling circle is provided with second baffling circle, third baffling circle is installed to the lower extreme of second baffling circle, and the lower extreme of third baffling circle is provided with fourth baffling circle, the inside of second baffling circle is provided with the support circle, and the internally mounted of second baffling circle has the baffling pole.

Preferably, the support ring is a plate-type circular ring, the circular ring is provided with a reserved opening of the positioning rod and a pull rod hole, the two baffle rods on the edge of the support ring are made of square steel, and the rest is made of round steel.

Preferably, the baffle rods on the same supporting ring are parallel to each other when being welded, and the baffle rods are distributed at equal intervals.

Preferably, the tube plate is positioned and fixed by a framework, and the framework is perpendicular to the tube plate.

Preferably, the positioning of the tube plate and the baffle ring is determined by a pull rod and a first distance tube and a second distance tube, the pull rod is installed in the tube plate, and the first distance tube and the second distance tube are sleeved on the pull rod.

Preferably, the number of the baffle rods is four, and each heat exchange tube in the tube bundle can be firmly fixed from four directions by the four baffle rods in the first baffle ring, the second baffle ring, the third baffle ring and the fourth baffle ring.

Preferably, the baffle rods of the adjacent first baffle ring, second baffle ring, third baffle ring and fourth baffle ring are arranged in a staggered manner in the transverse direction and the vertical direction.

The utility model provides a baffle ring of a baffle rod heat exchanger, which has the following beneficial effects: the baffle ring of the baffle rod heat exchanger changes the baffle plate pattern in the shell ring of the traditional baffle plate heat exchanger, changes the baffle plate into the baffle ring, reduces the generation of induced vibration of a tube bundle, has simpler structure, improves the energy utilization rate, is more convenient to install and maintain, improves the heat transfer coefficient and prolongs the service life of the heat exchanger; and the number of the distributed pipes and the flow area are increased by using the outer guide cylinders.

1. Compared with the baffle plate part of the traditional heat exchanger, the utility model prevents the generation of induced vibration because the fluid on the shell side is the longitudinal-swept tube bundle, improves the safety of the heat exchanger, greatly reduces the resistance of the fluid on the shell side, reduces the pumping work on the tube side and saves energy.

2. The baffle rod enhances the disturbance of fluid, and reduces the flow dead zone and leakage loss when the tube bundle is swept transversely, so that the heat exchange of the shell side is enhanced, namely the heat exchange coefficient of the shell side is not lower than that of the transverse sweeping, and the heat transfer coefficient can be improved by 15-50% depending on the conditions of medium, flow speed, phase change and the like of the shell side.

3. The utility model reduces the deposition and corrosion of dirt, prolongs the service life of the heat exchanger, and increases the flow area and the number of the pipes by welding the guide cylinder and the shell.

Drawings

FIG. 1 is a schematic view of a baffle ring of a rod baffle heat exchanger according to the present invention;

FIG. 2 is a schematic view of the internal structure of a second baffle ring of a rod baffle heat exchanger according to the present invention;

FIG. 3 is a schematic bottom view of the tube plate of the baffle ring of the rod baffle heat exchanger of the present invention.

In the figure: 1. supporting a lug; 2. a tube sheet; 3. a first pitch tube; 4. a framework; 5. a tube bundle; 6. a pull rod; 7. a second distance tube; 8. a nut; 9. a floating tube sheet; 10. a slide plate; 11. a first baffle ring; 12. A second baffle ring; 13. a third meander loop; 14. a fourth baffle ring; 15. a support ring; 16. a rod baffle.

Detailed Description

As shown in fig. 1 and 3, a baffle ring of a baffle rod heat exchanger comprises a support lug 1, a tube plate 2, a first distance tube 3, a framework 4, a tube bundle 5, a pull rod 6, a second distance tube 7, a nut 8, a floating tube plate 9, a sliding plate 10, a first baffle ring 11, a second baffle ring 12, a third baffle ring 13, a fourth distance tube 14, a support ring 15 and a baffle rod 16, wherein the tube plate 2 is fixedly arranged outside the support lug 1, the first distance tube 3 is arranged inside the tube plate 2, the tube plate 2 is positioned and fixed through the framework 4, the framework 4 is vertical to the tube plate 2, the positioning of the tube plate 2 and the baffle ring 12 is determined through the pull rod 6, the first distance tube 3 and the second distance tube 7, the pull rod 6 is arranged in the tube plate 2, the first distance tube 3 and the second distance tube 7 are sleeved on the pull rod 6, the framework 4 is arranged outside the first distance tube 3, the pull rod 6 is arranged at the upper end of the first distance tube 3, and the top of the pull rod 6 is provided with a nut 8, the top of the nut 8 is provided with a floating tube plate 9, the tube bundle 5 is positioned inside the floating tube plate 9, the shell side fluid is the longitudinal-swept tube bundle 5, the generation of induced vibration is prevented, the safety of the heat exchanger is improved, and greatly reduces the resistance of shell side fluid, reduces the pump work of pipe side, saves energy, the right end of the outer part of the nut 8 is provided with a sliding plate 10, the lower end of the outer part of the pull rod 6 is provided with a first baffling ring 11, and the lower extreme of first baffling circle 11 is provided with second baffling circle 12, and the baffling pole 16 of adjacent first baffling circle 11, second baffling circle 12, third baffling circle 13 and fourth baffling circle 14 is crisscross the arrangement anyhow, enables the baffling pole 16 and the interval of pipe near minimum, plays the centre gripping heat exchange tube and reaches the antivibration effect, and third baffling circle 13 is installed to the lower extreme of second baffling circle 12, and the lower extreme of third baffling circle 13 is provided with fourth baffling circle 14.

As shown in fig. 2, a support ring 15 is arranged inside the second baffle ring 12, baffle rods 16 are arranged inside the second baffle ring 12, the support ring 15 is a plate-type circular ring, openings and pull rod holes reserved for positioning rods are formed in the circular ring, two baffle rods 16 on the outermost side of the support ring 15 are square steel, the rest are round steel, the baffle rods 16 on the same support ring 15 are parallel to each other when being welded, the baffle rods 16 are distributed equidistantly, so that the deposition and corrosion of dirt are reduced, the service life of the heat exchanger is prolonged, a guide cylinder is welded with a shell, the flow area and the number of distribution pipes are increased, the baffle rods 16 enhance the disturbance of fluid, the flow dead zone and the leakage loss when the tube bundle 5 is swept, the heat exchange coefficient of the shell side is enhanced, namely, the heat exchange coefficient of the shell side is not lower than that when the shell side is swept, and the medium, shell side medium, and the baffle rods 16 are plate-type circular rings The flow rate and the conditions of phase change and the like exist, the heat transfer coefficient can be improved by 15-50 percent on the contrary, four baffle rods 16 are arranged, and each heat exchange tube in the tube bundle 5 can be firmly fixed from four directions by the four baffle rods 16 in the first baffle ring 11, the second baffle ring 12, the third baffle ring 13 and the fourth baffle ring 14.

In summary, in order to fix the tube plate 2 and the support ring 15 without rolling when the heat exchange tube is inserted into the deflection ring of the deflection rod heat exchanger and influence assembly, channel steel is used as a simple positioning frame before assembly, the tube plate 2 and the support ring 15 are vertically arranged on the positioning frame according to a designed distance, the length and the distance of the positioning frame are determined according to the specification size of the heat exchanger, and the positioning frame is flat, so that the tube plate 2 and the support ring 15 are stable and flat after being placed on the positioning frame, and unevenness of the tube plate 2 can be adjusted conveniently after the tube is inserted into the tube and the two tube plates 2 are arranged behind the tube;

the support rings 15 and the baffle rods 16 of the baffle rings cannot be assembled firstly, otherwise, the baffle rings are the same as the baffle type heat exchanger, even the baffle plates 16 are harder to penetrate tubes, and the baffle rods can penetrate through holes beside the tubes with a little deviation, the support rings 15 and the baffle rods 16 of the baffle rings are assembled in the tube penetrating process, the baffle rods 16 on the same baffle ring are parallel to each other, the baffle rods 16 of adjacent baffle rings are arranged in a staggered mode transversely and vertically, the assembly requirement is met, the advantages of the heat exchanger can be fully embodied in the using process, the distance between the baffle rods 16 and the tubes is close to the minimum, the heat exchange tube is clamped to achieve the vibration-proof effect, when the tube bundle 5 is assembled, the tube plate 2 with the pull rod holes is placed on a positioning frame, the pull rods are installed on the tube plate 2, the distance tubes are sleeved on the pull rods, a group of distance tubes are sleeved according to the drawing distance requirement, then one support ring 15 is penetrated, and the distance between the distance tube and the support ring 15 are repeatedly installed, after the tube plate 2, the pull rod 6, the distance tube and the support ring 15 are all installed on the positioning frame by screwing the nut 8, the outermost ring of heat exchange tubes starts to penetrate, the baffle rods 16 on the baffle rings are welded between the penetrated outer ring heat exchange tubes, from the end of the fixed tube plate 2, the baffle rods 16 vertical to the ground are welded on the 1 st and 2 th support ring bodies, every two heat exchange tubes are welded with one vertical baffle rod 16 on the same transverse row of the baffle rings, namely the baffle rods 16 of the 1 st and 2 th support ring bodies are welded and fixed by staggering one heat exchange tube, the 3 rd and 4 th support ring bodies are not welded with the baffle rods 16 (left for later welding), the 5 th and 6 th baffle rings are welded with the 1 st and 2 nd baffle rings, the 7 th and 8 th blocks are the same as the 3 rd and 4 th blocks, and are not welded temporarily, the baffle rings are assembled, and the rods 16 in the vertical direction are welded, horizontally placing a baffle rod 16 on the upper surface of the bottommost transverse heat exchange tube, and respectively welding the baffle rod 16 on the corresponding support ring body, after the baffle rods 16 are welded, starting to penetrate other heat exchange tubes, wherein the heat exchange tubes are arranged on the tube plate 2 in a square shape, and the tube penetration needs to be carried out according to a certain sequence, so that holes cannot be leaked, the heat exchange tubes cannot be penetrated, and the baffle rods 16 cannot be welded in a leakage manner; then a 2 nd row of heat exchange tubes are penetrated, and then a baffle rod 16 is horizontally arranged on the upper surface of the 2 nd row of heat exchange tubes and is respectively welded on the 3 rd, 7 th, 11 th, 15 th, 19 th, 23 th, 27 th and 31 th support ring bodies; then the 3 rd row of heat exchange tubes are penetrated, and a baffle rod 16 is horizontally arranged on the upper surface of the 3 rd row of heat exchange tubes and is respectively welded on the 4 th, 8 th, 12 th, 16 th, 20 th, 24 th, 28 th and 32 th support ring bodies; then the 4 th row of heat exchange tubes are penetrated, a baffle rod 16 is horizontally arranged on the upper surface of the 4 th row of heat exchange tubes and is respectively welded on the 3 rd, 7 th, 11 th, 15 th, 19 th, 23 th, 27 th and 31 th support ring bodies, the steps are repeated until the last row of tubes are penetrated and the last baffle rod 16 is welded, the heat exchange tubes and the baffle rings are visual and freely penetrated in the assembling process, the assembled tube bundle 5 is arranged in a prepared shell, then the heat exchange tubes are assembled with the tube plate 2 at the other end, the length of the heat exchange tubes extending out of the two tube plates 2 is regulated according to GB151-1999 or corresponding regulations in construction drawings, the unevenness of the two tube plates 2 is adjusted until corresponding requirements are met, the heat exchange tubes and the tube plates 2 are point-fixed, the shell and the tube plates 2 are point-fixed after being aligned, the tube bundle 5 is erected, the tube plates 2 and the heat exchange tubes are welded by adopting strength welding and expansion, the welding process of adjacent rows of tubes is noticed that continuous welding can not be carried out, the tube arrays are uniformly welded at intervals of 5-6 tubes according to requirements, so that the thermal stress is reduced, and the tube plate 2 is prevented from deforming.

Claims

1. The baffle ring of the baffle rod heat exchanger comprises a support lug (1), a tube bundle (5) and a support ring (15), and is characterized in that a tube plate (2) is fixedly arranged outside the support lug (1), a first distance tube (3) is arranged inside the tube plate (2), a framework (4) is arranged outside the first distance tube (3), a pull rod (6) is arranged at the upper end of the first distance tube (3), a nut (8) is arranged at the top of the pull rod (6), a floating tube plate (9) is arranged at the top of the nut (8), the tube bundle (5) is positioned inside the floating tube plate (9), a sliding plate (10) is arranged at the right end outside the nut (8), a first baffle ring (11) is arranged at the lower end outside the pull rod (6), a second baffle ring (12) is arranged at the lower end of the first baffle ring (11), a third baffle ring (13) is arranged at the lower end of the second baffle ring (12), and the lower extreme of third baffling circle (13) is provided with fourth baffling circle (14), the inside of second baffling circle (12) is provided with support circle (15), and the internally mounted of second baffling circle (12) has baffling pole (16).

2. A rod baffle heat exchanger baffle ring as claimed in claim 1, wherein the support ring (15) is a plate-type circular ring, and openings reserved for the positioning rods and rod holes are formed in the circular ring, and two rod baffles (16) at the outermost edges of the support ring (15) are made of square steel, and the rest are made of round steel.

3. The baffle ring of the baffle rod heat exchanger in claim 1, wherein the baffle rods (16) on the support ring (15) are welded parallel to each other, and the baffle rods (16) are distributed equidistantly.

4. A rod baffle heat exchanger baffle ring according to claim 1, wherein the tube plate (2) is positioned and fixed by a frame (4), and the frame (4) and the tube plate (2) are perpendicular to each other.

5. A rod baffle heat exchanger baffle ring according to claim 1, characterized in that the positioning of the tube plate (2) and the baffle ring (12) is determined by tie rods (6) and first (3) and second (7) distance tubes, and the tie rods (6) are fitted into the tube plate (2), and the first (3) and second (7) distance tubes are fitted over the tie rods (6).

6. The baffle rod heat exchanger of claim 1, wherein the number of the baffle rods (16) is four, and each heat exchange tube in the tube bundle (5) can be firmly fixed by four baffle rods (16) in the first baffle ring (11), the second baffle ring (12), the third baffle ring (13) and the fourth baffle ring (14) from four directions.

7. The baffle rod heat exchanger of claim 1, wherein the baffle rods (16) of adjacent first (11), second (12), third (13) and fourth (14) baffle rings are staggered.