CN219265059U - Fixed tube-plate heat exchanger - Google Patents

Abstract

The utility model belongs to the technical field of heat exchangers, and discloses a fixed tube-sheet type heat exchanger, which comprises a shell-side cylinder body which is horizontally arranged, wherein one end of the shell-side cylinder body in the axial direction is connected with the first tube-side cylinder body through a first tube plate, the other end of the shell-side cylinder body in the axial direction is connected with the second tube-side cylinder body through a second tube plate, a heat exchange assembly comprises a plurality of baffle plates, a heat exchange tube bundle and a long baffle plate, the baffle plates are fixedly arranged on the inner wall of the shell-side cylinder body in a staggered manner along the axial direction of the shell-side cylinder body, and the heat exchange tube bundle and the long baffle plate are respectively arranged on the baffle plates in a penetrating manner. When the medium enters from the shell-side medium inlet, the medium can fall on the long baffle, so that the medium flows along the long baffle, the flow path of the medium is prolonged, the heat exchange process is fully carried out, condensate and noncondensable gas are fully separated, the heat transfer efficiency is improved, and the long baffle does not completely divide the shell-side cylinder, so that the resistance of the shell side is greatly reduced compared with a complete-division structure.

Description

Fixed tube-plate heat exchanger

Technical Field

The utility model relates to the technical field of heat exchangers, in particular to a fixed tube plate type heat exchanger.

Background

The fixed tube-plate heat exchanger is an energy-saving device for realizing heat transfer between media, and is a process device commonly applied in industries such as petroleum, chemical industry, metallurgy, electric power, light industry, food and the like. In the oil refining and chemical industry device, the heat exchanger accounts for about 40% of the total equipment and 30% -45% of the total investment. Along with the development of energy-saving technology, the application field is continuously expanded, and obvious economic benefits are brought by utilizing the heat exchanger to recycle high-temperature low-temperature heat energy.

The fixed tube plate type heat exchanger is a tube shell type heat exchanger in which tube plates at two ends of a tube bundle are fixedly connected with a shell by adopting a welding method. The heat exchanger has a simple structure, and the required inner diameter of the shell is minimum under the condition of ensuring equal heat transfer surfaces. Mainly comprises a single shell-pass structure or a single external flow guiding structure and a shell-pass branch structure.

When the fixed tube-sheet heat exchanger adopts a single shell side structure, the shell side is extremely easy to have the conditions of insufficient separation of noncondensable gas and condensate, a large amount of liquid phase medium in the noncondensable gas, low condensation efficiency and the like. When the shell pass structure is adopted, the problems of overlarge shell pass resistance of equipment, high vibration frequency of the tube bundle and the like exist.

Disclosure of Invention

The utility model aims to provide a fixed tube-plate heat exchanger, which enables condensate and noncondensable gas to be fully separated and improves heat transfer efficiency.

To achieve the purpose, the utility model adopts the following technical scheme:

the fixed tube and plate heat exchanger includes:

the shell-side cylinder body is horizontally arranged and comprises a shell-side medium inlet, a shell-side liquid phase outlet and a shell-side gas phase outlet;

a first tube side cylinder and a second tube side cylinder, wherein the first tube side cylinder and the second tube side cylinder are respectively connected with two axial ends of the shell side cylinder, the first tube side cylinder comprises a tube side medium outlet and a tube side medium inlet, the first tube side barrel is internally provided with a tube side medium outlet and a tube side medium inlet, or the first tube side barrel comprises a tube side medium outlet and the second tube side barrel comprises a tube side medium inlet;

the first tube plate is clamped between the first tube side cylinder body and the shell side cylinder body, and the second tube plate is clamped between the second tube side cylinder body and the shell side cylinder body;

the heat exchange assembly is arranged in the shell-side cylinder body and comprises a plurality of baffle plates and a heat exchange tube bundle, the baffle plates are fixedly arranged on the inner wall of the shell-side cylinder body in an axial dislocation manner along the shell-side cylinder body, a first baffle channel is arranged between each baffle plate and the inner wall of the shell-side cylinder body, one end of the heat exchange tube bundle is arranged on the first tube plate in a penetrating manner, and the other end of the heat exchange tube bundle sequentially passes through the baffle plates and is arranged on the second tube plate in a penetrating manner;

the heat exchange assembly further comprises a long baffle plate, the long baffle plate is provided with a first end and a second end along the length direction of the long baffle plate, the first end is fixedly connected with the first tube plate, the second end sequentially penetrates through a plurality of baffle plates and is close to the second tube plate, the long baffle plate is provided with a third end and a fourth end along the width direction of the long baffle plate, the third end is fixedly connected with the inner side wall of one side of the shell side cylinder and is positioned above the shell side gas phase outlet, and a second baffle channel is arranged between the fourth end and the inner side wall of the other side of the shell side cylinder.

Optionally, the long baffle plate and the horizontal plane form an included angle, and the third end is higher than the fourth end.

Optionally, the heat exchange assembly further comprises a sealing unit, the sealing unit comprises a sealing member, one end of the sealing member is connected with the third end of the long baffle, and the other end of the sealing member is abutted with the inner side wall of the shell side cylinder.

Optionally, the sealing unit further comprises:

the sealing element is clamped between the pressing plate and the long baffle;

and the locking piece is used for locking or unlocking the pressing plate and the long baffle plate.

Optionally, the sealing unit further comprises a support member, wherein the support member is fixedly arranged at the third end of the long baffle plate, and the support member is abutted to one side of the sealing member.

Optionally, a plurality of buffer rods are arranged in the second baffling channel, the buffer rods are arranged at intervals along the width direction of the long baffle, and the buffer rods sequentially penetrate through the baffle plates.

Optionally, the baffle plate is provided with an exhaust hole, and the exhaust hole is positioned between two adjacent buffer rods.

Optionally, a support structure is further arranged in the first tube side cylinder, and the support structure is used for supporting the separation partition.

Optionally, a shock-proof structure corresponding to the shell-side medium inlet is further arranged in the shell-side cylinder, and the shock-proof structure is used for slowing down the flow rate of the medium entering the shell-side cylinder from the shell-side medium inlet.

Optionally, the impact-preventing structure is a plurality of impact-preventing rods arranged at intervals.

The utility model has the beneficial effects that:

the utility model provides a fixed tube plate type heat exchanger, which comprises a shell side cylinder, wherein a shell side medium inlet for medium to enter and a shell side liquid phase outlet and a shell side gas phase outlet for discharging the medium after heat exchange are formed in the shell side cylinder, one end of the shell side cylinder in the axial direction is connected with the first tube side cylinder through a first tube plate, the other end of the shell side cylinder in the axial direction is connected with the second tube side cylinder through a second tube plate, a heat exchange component comprises a plurality of baffle plates and a heat exchange tube bundle, the baffle plates are fixedly arranged on the inner wall of the shell side cylinder in an axial staggered manner along the shell side cylinder, a first circulating channel for medium circulation is formed between the baffle plates and the inner wall of the shell side cylinder, one end of the heat exchange tube bundle penetrates through the first tube plate, the other end of the heat exchange tube bundle penetrates through the baffle plates sequentially and penetrates through the second tube plate, and is in heat exchange with the medium inside the shell side cylinder, the long baffle plate is fixedly connected with the first tube plate, the second end of the long baffle plate is provided with the first tube plate in the length direction, the second end of the long baffle plate is sequentially penetrated through the plurality of baffle plates and is close to the second tube plate in the width direction, and the long baffle plate is provided with the inner side wall of the long baffle plate in the length direction, which is fixedly connected with the inner side wall of the shell side of the long baffle plate. When the medium enters from the shell-side medium inlet, the medium can fall on the long baffle, so that the medium needs to flow along the long baffle, the flow path of the medium is prolonged, the heat exchange process is fully carried out, condensate and noncondensable gas are fully separated, the heat transfer efficiency is improved, the third end of the long baffle is positioned above the shell-side gas phase outlet, the liquid medium is prevented from flowing out from the shell-side gas phase outlet, and the long baffle does not completely divide the shell-side cylinder, so that compared with a method for prolonging the heat exchange path through dividing the shell-side, the resistance drop of the shell-side is greatly reduced.

Drawings

FIG. 1 is a schematic view of the main structure of the present utility model;

FIG. 2 is a side view of the body structure of the present utility model taken along the direction A;

FIG. 3 is a schematic view of a shell side cartridge of the present utility model;

FIG. 4 is a schematic view of the shell side barrel of the present utility model along B-B;

FIG. 5 is a schematic view of the body structure of the first tube side barrel of the present utility model;

FIG. 6 is a side view of the first tube side barrel of the present utility model in the direction C;

FIG. 7 is a schematic view of the interior of a shell side cartridge of the present utility model;

fig. 8 is an enlarged schematic view of a portion D in fig. 7.

In the figure:

1. a shell side cylinder; 11. a shell side media inlet; 12. a shell side liquid phase outlet; 13. a shell side gas phase outlet; 14. a support base; 141. a fixed end support; 142. a movable end support; 15. shell side vent; 16. shell side discharge port; 17. an anti-impact rod;

2. a first tube side cylinder; 21. a tube side medium outlet; 22. a tube side medium inlet; 23. a separation baffle; 231. a clear hole is arranged; 24. a support structure;

3. a second tube side cylinder; 31. a tube side emptying port; 32. a tube side condensation outlet;

4. a first tube sheet;

5. a second tube sheet;

6. a heat exchange assembly; 61. a baffle plate; 62. a heat exchange tube bundle; 63. a long baffle; 64. a sealing unit; 641. a seal; 642. a pressing plate; 643. a locking member; 644. a support; 65. a buffer rod; 66. and an exhaust hole.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to fully perform the heat exchange process, the condensate and the noncondensable gas are fully separated, so that the heat exchange efficiency is improved, and the embodiment provides the fixed tube-plate heat exchanger.

As shown in fig. 1-8, the fixed tube sheet heat exchanger includes a shell side cylinder 1, a first tube side cylinder 2, a second tube side cylinder 3, a first tube sheet 4, a second tube sheet 5, and a heat exchange assembly 6. The shell-side cylinder 1 is horizontally arranged, a shell-side medium inlet 11 is formed in the top of the shell-side cylinder 1, a shell-side liquid phase outlet 12 is formed in the bottom of the shell-side cylinder 1, and a shell-side gas phase outlet 13 is formed in the side wall of the shell-side cylinder 1.

In this embodiment, two shell-side medium inlets 11 are provided at the top of the shell-side cylinder 1, and a shell-side liquid phase outlet 12 is provided at the bottom of the shell-side cylinder 1, and is located in the middle of the two shell-side medium inlets 11. The medium enters from the two shell-side medium inlets 11 at the same time, after heat exchange, the medium in liquid phase is converged towards the middle and finally flows out from the shell-side liquid phase outlet 12, and the medium in gas phase is discharged from the shell-side gas phase outlet 13 on the side wall of the shell-side cylinder 1. And the two sides are subjected to heat exchange operation simultaneously, so that the heat exchange efficiency can be effectively improved. And in order to install the fixed tube sheet type heat exchanger, a supporting seat 14 is provided at the bottom of the shell side cylinder 1 to support the fixed tube sheet type heat exchanger, wherein the supporting seat 14 comprises a fixed end support 141 and a movable end support 142, so that the distance between the two supports is conveniently adjusted, and thus the fixed tube sheet type heat exchanger is better supported.

The first tube side cylinder 2 and the second tube side cylinder 3 are respectively connected to two axial ends of the shell side cylinder 1, in this embodiment, the fixed tube plate type heat exchanger has a double tube side structure, and compared with the single tube side structure, the heat exchange temperature difference of the medium can be improved, and the energy efficiency ratio is improved. Specifically, a tube side medium outlet 21 is formed in the top of the first tube side cylinder 2, a tube side medium inlet 22 is formed in the bottom of the first tube side cylinder 2, a separation baffle 23 for separating the tube side medium outlet 21 and the tube side medium inlet 22 is further arranged in the first tube side cylinder 2, the first tube plate 4 is clamped between the first tube side cylinder 2 and the shell side cylinder 1, and the second tube plate 5 is clamped between the second tube side cylinder 3 and the shell side cylinder 1.

Of course, in other embodiments, the fixed tube-sheet heat exchanger may also have a single tube structure, specifically, the top of the first tube-side cylinder 2 is provided with a tube-side medium outlet 21, and the bottom of the second tube-side cylinder 3 is provided with a tube-side medium inlet 22. At this time, the tube side medium outlet 21 is provided on the first tube side cylinder 2, and the tube side medium inlet 22 is provided on the second tube side cylinder 3 without providing the separation partition 23, and the structure is a single tube side structure.

The heat exchange assembly 6 is arranged in the shell-side cylinder 1, the heat exchange assembly 6 comprises a plurality of baffle plates 61 and a heat exchange tube bundle 62, the baffle plates 61 are fixedly arranged on the inner wall of the shell-side cylinder 1 in an axial staggered manner along the shell-side cylinder 1, a first baffle channel is arranged between each baffle plate 61 and the inner wall of the shell-side cylinder 1, one end of the heat exchange tube bundle 62 penetrates through the first tube plate 4, and the other end of the heat exchange tube bundle 62 sequentially penetrates through the baffle plates 61 and penetrates through the second tube plate 5.

In this embodiment, the heat exchange tube bundle 62 includes a plurality of heat exchange tubes, each of which passes through all of the baffles 61, such that the baffles 61 form a full support for the heat exchange tube bundle 62, thereby reducing the vibration frequency of the tube bundle. And the heat exchange tube bundle 62 adopts a corrugated heat exchange tube, compared with a common light tube, the corrugated heat exchange tube can strengthen the flow of fluid in the tube, so that the fluid continuously forms turbulence, the heat transfer effect is enhanced, and the heat exchange efficiency is improved.

The heat exchange assembly 6 further comprises a long baffle 63, the long baffle 63 is provided with a first end and a second end along the length direction, the first end is fixedly connected with the first tube plate 4, the second end sequentially passes through the baffle plates 61 and is close to the second tube plate 5, the long baffle 63 is provided with a third end and a fourth end along the width direction, the third end is fixedly connected with the inner side wall of one side of the shell side cylinder 1 and is positioned above the shell side gas phase outlet 13, and a second baffle channel is arranged between the fourth end and the inner side wall of the other side of the shell side cylinder 1. By additionally arranging the long baffle 63 in the heat exchange assembly 6, the flowing path of the medium in the shell-side cylinder body 1 is prolonged, so that the heat exchange process is fully carried out, condensate and noncondensable gas are fully separated, the heat transfer efficiency is improved, the third end of the long baffle 63 is positioned above the shell-side gas phase outlet 13, and the condition that the medium in liquid phase flows out from the shell-side gas phase outlet 13 and a medium short circuit occurs is avoided. And the second baffling channel is arranged between the fourth end of the long baffle 63 and the inner wall of the shell-side cylinder 1, and the shell-side cylinder 1 is not completely branched, so that compared with a method for prolonging the heat exchange path by branching, the resistance drop of the shell-side is greatly reduced.

Because the heat exchanger used in this embodiment is a fixed tube plate heat exchanger, the heat exchange tube bundle 62 is a straight tube, and compared with the U-shaped heat exchange tube bundle 62 used in the U-shaped tube heat exchanger, the straight tube structure used in this embodiment is less prone to scaling medium, and the U-shaped tube is more difficult to clean than a straight tube because of the bent tube section. In addition, the straight pipe is easier to manufacture and the production cost is lower than that of the U-shaped pipe. In addition, because the flow area of the shell side gas phase outlet 13 side is required to be ensured, the U-shaped pipe structure needs to be symmetrically distributed, and the outlet and the symmetrical side thereof are provided with non-distributed areas, so the total number of the distributed pipes is small, the fixed pipe plate structure does not need to be symmetrically distributed, the total number of the distributed pipes is more, and the heat exchange efficiency is higher.

In order to better follow the basic principle of high-point emptying and low-point condensation discharging in the pipeline design, a shell-side emptying port 15 is arranged at the top of the shell-side barrel 1, and a shell-side condensation discharging port 16 is arranged at the bottom of the shell-side barrel 1; a tube side vent 31 is arranged at the top of the second tube side cylinder 3, and a tube side condensation outlet 32 is arranged at the bottom of the second tube side cylinder 3.

Further, as shown in fig. 3, 5 and 7, the long baffle 63 is disposed at an angle with respect to the horizontal plane, and the third end is higher than the fourth end. The long baffle 63 is in an inclined state, and compared with the long baffle 63 which is horizontally arranged, the long baffle 63 in the inclined state can prolong the medium flowing path, and when the medium enters from the shell side medium inlet 11, the long baffle 63 is obliquely arranged, so that the impact on the long baffle 63 when the medium falls down can be effectively relieved, and the long baffle 63 is prevented from deforming due to the impact of the medium.

Since the present embodiment has a double-pass structure, the pass partition 23 in the first pass cylinder 2 is provided corresponding to the long baffle 63, and is also inclined.

Optionally, as shown in fig. 3 and 8, the heat exchange assembly 6 further includes a sealing unit 64, the sealing unit 64 includes a sealing element 641, one end of the sealing element 641 is connected to the third end of the long baffle 63, and the other end of the sealing element 641 abuts against the inner side wall of the shell-side cylinder 1. By adding the seal 641 between the third end of the long baffle 63 and the inner wall of the shell-side cylinder 1, the medium can be prevented from flowing through the gap between the third end of the long baffle 63 and the inner wall of the shell-side cylinder 1, and further, the short circuit of the shell-side medium can be prevented. The seal 641 is an elastic seal 641 in the present embodiment so that the seal 641 can adjust its posture according to a structure so as to better perform a sealing function.

Further, as shown in fig. 8, the sealing unit 64 further includes a pressing plate 642 and a locker 643. The sealing element 641 is clamped between the pressing plate 642 and the long baffle 63; the locking member 643 is used to lock or unlock the pressure plate 642 to or from the long shutter 63. Because the pressing plate 642 presses the sealing element 641 against the long baffle 63, the sealing element 641 is uniformly stressed, thereby better realizing the sealing function of the sealing element 641. In this embodiment, the locking member 643 includes a bolt and a nut, and the third end of the long baffle 63 and the pressing plate 642 are respectively provided with a through hole, so that the sealing member 641 is clamped between the third end of the long baffle 63 and the pressing plate 642, and the bolt passes through the through holes of the third end of the long baffle 63 and the pressing plate 642 and is locked by the nut. Thereby completing the fixation of the seal 641. And the structure is detachable, so that the sealing element 641 is convenient to replace at any time.

Further, as shown in fig. 7 and 8, the sealing unit 64 further includes a supporting member 644, the supporting member 644 is fixed to the third end of the long baffle 63, and the supporting member 644 abuts against one side of the sealing member 641. The seal 641 is thin and has a small hardness, and the seal 641 is supported by the support 644, so that a case where a shell side medium short circuit occurs due to the excessive medium flow to blow the seal 641 is avoided. In this embodiment, the support block is welded to the last baffle 61.

Alternatively, as shown in fig. 7, a plurality of buffer rods 65 are provided in the second baffle passage, the plurality of buffer rods 65 are disposed at intervals in the width direction of the long baffle 63, and the plurality of buffer rods 65 sequentially penetrate the plurality of baffles 61. Through setting up a plurality of buffer rods 65 in the second baffling passageway to this plays certain blocking effect to the medium, reduces the velocity of flow of medium, thereby plays the purpose of extension heat transfer time, makes the heat transfer more abundant. In the present embodiment, five buffer rods 65 are provided according to the structure, and the distance between each adjacent two buffer rods 65 is equal.

Further, as shown in fig. 7, the baffle 61 is provided with a vent 66, and the vent 66 is located between two adjacent buffer rods 65. By providing the vent 66, the chambers are communicated, thereby ensuring pressure balance between the chambers.

Optionally, as shown in fig. 5, a supporting structure 24 is further disposed in the first tube side cylinder 2, and the supporting structure 24 is used for supporting the separation partition 23. Because the medium is arranged above the separation partition 23, the deformation of the separation partition 23 caused by the gravity of the medium is avoided by arranging the supporting structure 24 at the bottom of the separation partition 23. In the present embodiment, the supporting structure 24 of the partition 23 is not limited to flat steel or angle steel, but may be a supporting structure of other shapes. And the edge of the separation partition 23 is provided with a clean hole 231, so that long-term accumulation of medium is avoided, the pressure difference on two sides of the partition is balanced, and the stress of the partition is improved.

Optionally, as shown in fig. 3, a shock-proof structure corresponding to the shell-side medium inlet 11 is further provided in the shell-side cylinder 1, and the shock-proof structure is used for slowing down the flow rate of the medium entering the shell-side cylinder 1 from the shell-side medium inlet 11. The medium is prevented from directly entering from the shell side medium inlet 11, and the heat exchange tube bundle 62 and the long baffle 63 are impacted, so that the heat exchange tube bundle 62 or the long baffle 63 is deformed.

In this embodiment, the impact structure is a plurality of impact bars 17 arranged at intervals. The anti-impact rod 17 can be made of round bars with multiple entities or made of multiple flat steel, and when the anti-impact rod 17 is arranged, the axis of the anti-impact rod is parallel to the horizontal plane or forms an included angle, and the included angle between the anti-impact rod 17 and the horizontal plane can be freely adjusted according to the degree of buffering required.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A fixed tube and plate heat exchanger, the fixed tube and plate heat exchanger comprising:

the shell-side cylinder body (1), wherein the shell-side cylinder body (1) is horizontally arranged, and the shell-side cylinder body (1) comprises a shell-side medium inlet (11), a shell-side liquid phase outlet (12) and a shell-side gas phase outlet (13);

the shell side shell comprises a first tube side barrel body (2) and a second tube side barrel body (3), wherein the first tube side barrel body (2) and the second tube side barrel body (3) are respectively connected to two axial ends of the shell side barrel body (1), the first tube side barrel body (2) comprises a tube side medium outlet (21) and a tube side medium inlet (22), a separation baffle (23) for separating the tube side medium outlet (21) and the tube side medium inlet (22) is further arranged in the first tube side barrel body (2), or the first tube side barrel body (2) comprises the tube side medium outlet (21), and the second tube side barrel body (3) comprises the tube side medium inlet (22);

the first tube plate (4) is clamped between the first tube side cylinder body (2) and the shell side cylinder body (1), and the second tube plate (5) is clamped between the second tube side cylinder body (3) and the shell side cylinder body (1);

the heat exchange assembly (6), the heat exchange assembly (6) is arranged in the shell-side cylinder body (1), the heat exchange assembly (6) comprises a plurality of baffle plates (61) and heat exchange tube bundles (62), the baffle plates (61) are fixedly arranged on the inner wall of the shell-side cylinder body (1) in an axial misplacement manner along the shell-side cylinder body (1), a first baffle channel is arranged between each baffle plate (61) and the inner wall of the shell-side cylinder body (1), one end of each heat exchange tube bundle (62) is arranged on the first tube plate (4) in a penetrating manner, the other end of each heat exchange tube bundle (62) sequentially penetrates through the baffle plates (61) and is arranged on the second tube plate (5),

it is characterized in that the method comprises the steps of,

the heat exchange assembly (6) further comprises a long baffle (63), the long baffle (63) is provided with a first end and a second end along the length direction of the long baffle, the first end is fixedly connected with the first tube plate (4), the second end sequentially penetrates through the baffle plates (61) and is close to the second tube plate (5), the long baffle (63) is provided with a third end and a fourth end along the width direction of the long baffle, the third end is fixedly connected with the inner side wall of one side of the shell side cylinder (1) and is positioned above the shell side gas phase outlet (13), and a second baffle channel is arranged between the fourth end and the inner side wall of the other side of the shell side cylinder (1).

2. A fixed tube and plate heat exchanger according to claim 1, wherein the long baffle (63) is arranged at an angle to the horizontal and the third end is higher than the fourth end.

3. A fixed tube and plate heat exchanger according to claim 1, wherein the heat exchange assembly (6) further comprises a sealing unit (64), the sealing unit (64) comprising a seal (641), one end of the seal (641) being connected to the third end of the long baffle (63), the other end of the seal (641) being in abutment with an inner side wall of the shell-side cylinder (1).

4. A fixed tube and plate heat exchanger according to claim 3, wherein the sealing unit (64) further comprises:

a pressure plate (642) between which the seal (641) is interposed;

a locking member (643), the locking member (643) being used to lock or unlock the pressing plate (642) with the long shutter (63).

5. The fixed tube and plate heat exchanger according to claim 4, wherein the sealing unit (64) further comprises a support (644), the support (644) is fixedly arranged at the third end of the long baffle (63), and the support (644) abuts against one side of the seal (641).

6. A fixed tube and plate heat exchanger according to claim 1 wherein a plurality of buffer rods (65) are provided in the second baffle passage, the plurality of buffer rods (65) being disposed at intervals in the width direction of the long baffle plate (63), the plurality of buffer rods (65) penetrating the plurality of baffle plates (61) in sequence.

7. A fixed tube and plate heat exchanger according to claim 6, wherein the baffle plate (61) is provided with a vent hole (66), said vent hole (66) being located between two adjacent buffer rods (65).

8. A fixed tube and plate heat exchanger according to claim 1, wherein a support structure (24) is further provided in the first tube side cylinder (2), the support structure (24) being adapted to support the partitional baffle (23).

9. A fixed tube and plate heat exchanger according to claim 1, characterized in that a shock-proof structure arranged in correspondence with the shell side medium inlet (11) is also provided in the shell side cylinder (1), said shock-proof structure being adapted to slow down the flow rate of the medium entering the shell side cylinder (1) from the shell side medium inlet (11).

10. A fixed tube and plate heat exchanger according to claim 9, wherein the impact protection structure is a plurality of spaced impact protection bars (17).

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