Combined distributor for shell-and-tube heat exchanger

Abstract

The utility model discloses a combined distributor for a shell-and-tube heat exchanger, which comprises a shell, a tube plate, an upper tube box, a baffle component and a combined distributor, the baffle component comprises a vertical rib plate, two half rib plates and four baffles; the vertical rib plate is vertically arranged; the two half rib plates are symmetrically arranged on the front side surface and the rear side surface of the vertical rib plate and form a cross shape in a surrounding manner; the four baffles are connected between the half rib plates and the vertical rib plate and are obliquely arranged; the combined distributor comprises a first distributor, a second distributor and a third distributor, the first distributor is a circular plane distributor, the second distributor and the third distributor are corrugated plate distributors, and wave crests of the second distributor correspond to wave troughs of the third distributor. The shell-and-tube heat exchanger is reasonable in design, liquid at the liquid inlet of the top connecting pipe is shunted through the baffle component, vortex is prevented from being generated, the liquid is evenly distributed, then it is guaranteed that the liquid entering the heat exchange pipe is even, and the heat exchange performance of the shell-and-tube heat exchanger is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of shell and tube heat exchanger distribution, in particular to a combined distributor for a shell and tube heat exchanger. Background Art

[0002] In a shell and tube heat exchanger, after the gas and the absorption liquid react, the liquid after the reaction flows from the top pipe of the heat exchanger into the distributor, which distributes it to multiple heat exchange tubes. Finally, under the action of gravity, it descends along the wall of the heat exchange tube and exchanges heat with the cooling water in the shell. However, in actual production and use, it is difficult to ensure that liquid can be distributed to each heat exchange tube, which leads to uneven distribution of the absorption liquid, greatly affecting the heat exchange efficiency. Therefore, the key role of the distributor in this type of equipment is very obvious.

[0003] Therefore, there is an urgent need for a combined distributor for a shell and tube heat exchanger with a simple structure and reasonable design. The baffle component is used to divert the liquid at the liquid inlet of the top pipe to prevent the generation of vortices, and the first distributor, the second distributor and the third distributor are used to evenly distribute the liquid, thereby ensuring that the liquid entering the heat exchange tube is uniform, thereby greatly improving the heat exchange performance of the shell and tube heat exchanger. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a combined distributor for a shell and tube heat exchanger in view of the deficiencies in the above-mentioned prior art. The combined distributor has a simple structure and a reasonable design. The baffle component is used to divert the liquid at the liquid inlet of the top connecting pipe to prevent the generation of eddy currents. The first distributor, the second distributor and the third distributor are used to evenly distribute the liquid, thereby ensuring that the liquid entering the heat exchange tube is even, thereby greatly improving the heat exchange performance of the shell and tube heat exchanger.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a combined distributor for a shell and tube heat exchanger, characterized in that it comprises a shell, a tube sheet connected to the end of the shell, and an upper tube box connected to the tube sheet, and a baffle component arranged at the liquid inlet of the upper tube box and a combined distributor arranged in the upper tube box and located below the baffle component;

[0006] The baffle component includes a vertical rib plate arranged vertically, two half rib plates symmetrically arranged on the front and rear sides of the vertical rib plate and arranged in a cross shape, and four baffle plates connected between the half rib plates and the vertical rib plate and arranged obliquely;

[0007] The combined distributor comprises a first distributor, a second distributor and a third distributor, the first distributor is a circular plane distributor, the second distributor and the third distributor are both corrugated plate distributors, and the wave crests of the second distributor and the wave troughs of the third distributor are arranged correspondingly.

[0008] The above-mentioned combined distributor for a shell and tube heat exchanger is characterized in that: the upper tube box comprises an upper tube box head integrally formed with the upper tube box cylinder and the upper tube box cylinder, and a connecting flange is provided at the end of the upper tube box cylinder close to the tube sheet, and the connecting flange is connected to the protruding end of the tube sheet;

[0009] A liquid inlet is provided at the center of the upper tube box head, and a top connecting pipe is provided at the liquid inlet;

[0010] The tops of the vertical ribs and the half ribs are arc-shaped and adapted to the inner side walls of the upper tube box head, and the tops of the vertical ribs and the half ribs are welded to the inner side walls of the upper tube box head.

[0011] The above-mentioned combined distributor for a shell and tube heat exchanger is characterized in that: a first horizontal portion is provided on the circumferential edge of the first distributor, a second horizontal portion is provided on the circumferential edge of the second distributor, and a third horizontal portion is provided on the circumferential edge of the third distributor. The first horizontal portion, the second horizontal portion and the third horizontal portion are connected by a connecting rod, a lower connecting rod is installed at the bottom of the third horizontal portion, and the bottom thread of the lower connecting rod is installed on a mounting block, and the mounting block is arranged on the tube sheet.

[0012] The above-mentioned combined distributor for a shell and tube heat exchanger is characterized in that: the first distributor is provided with a plurality of first through holes, the second distributor is provided with a plurality of second through holes, the third distributor is provided with a plurality of third through holes, and the first through holes, the second through holes and the third through holes are arranged in a staggered manner;

[0013] A plurality of heat exchange tubes are provided on the tube plate, and the inlets of the heat exchange tubes are arranged corresponding to the third through holes.

[0014] The above-mentioned combined distributor for a shell and tube heat exchanger is characterized in that a gap is provided between the circumferential side walls of the first distributor, the second distributor and the third distributor and the inner side wall of the upper tube box cylinder.

[0015] The above-mentioned combined distributor for a shell and tube heat exchanger is characterized in that a plurality of through holes are provided on the baffle.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The utility model has a simple structure and a small volume. The combination of the baffle plate and the first distributor, the second distributor and the third distributor below can realize uniform distribution of the liquid in the heat exchanger, thereby improving the heat exchange efficiency of the heat exchanger.

[0018] 2. The second distributor and the third distributor of the utility model are both corrugated plates, which not only increase the flow area of ​​the liquid, but also reduce the risk of liquid blocking the holes.

[0019] In summary, the utility model has a simple structure and a reasonable design. The baffle component is used to divert the liquid at the liquid inlet of the top pipe to prevent the generation of eddy currents. The first distributor, the second distributor and the third distributor are used to evenly distribute the liquid, thereby ensuring that the liquid entering the heat exchange tube is uniform, thereby greatly improving the heat exchange performance of the shell and tube heat exchanger.

[0020] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the baffle component of the utility model.

[0023] Description of reference numerals:

[0024] 1—Baffle component; 1-1—Vertical rib plate; 1-2—Half rib plate;

[0025] 1-3—Baffle; 1-4—Via hole;

[0026] 2—first distributor; 2-1—first horizontal part;

[0027] 3—second distributor; 3-1—second horizontal part; 4—third distributor;

[0028] 4-1—third horizontal part; 5—tube sheet; 6—connecting rod;

[0029] 7—Mounting block; 8—Upper tube box body; 8-1—Connecting flange;

[0030] 9—shell; 10—upper tube box head;

[0031] 11—Top connecting pipe; 12—Heat exchange tube. DETAILED DESCRIPTION

[0032] like Figure 1 and Figure 2 As shown, the utility model comprises a shell 9, a tube sheet 5 connected to the end of the shell 9, and an upper tube box connected to the tube sheet 5, a baffle component 1 arranged at the liquid inlet of the upper tube box, and a combined distributor arranged in the upper tube box and located below the baffle component 1;

[0033] The baffle member 1 includes a vertical rib plate 1-1 arranged vertically, two half rib plates 1-2 symmetrically arranged on the front and rear sides of the vertical rib plate 1-1 and arranged in a cross shape, and four baffle plates 1-3 connected between the half rib plates 1-2 and the vertical rib plate 1-1 and arranged obliquely;

[0034] The combined distributor includes a first distributor 2, a second distributor 3 and a third distributor 4. The first distributor 2 is a circular plane distributor, and the second distributor 3 and the third distributor 4 are both corrugated plate distributors. The crests of the second distributor 3 and the troughs of the third distributor 4 are arranged correspondingly.

[0035] In this embodiment, the upper tube box includes an upper tube box body 8 and an upper tube box head 10 formed integrally with the upper tube box body 8. The end of the upper tube box body 8 close to the tube sheet 5 is provided with a connecting flange 8-1, and the connecting flange 8-1 is connected to the protruding end of the tube sheet 5.

[0036] A liquid inlet is provided at the center of the upper tube box head 10, and a top pipe 11 is provided at the liquid inlet;

[0037] The tops of the vertical ribs 1-1 and the half ribs 1-2 are arc-shaped to match the inner wall of the upper tube box head 10, and the tops of the vertical ribs 1-1 and the half ribs 1-2 are welded to the inner wall of the upper tube box head 10.

[0038] In this embodiment, the circumferential edge of the first distributor 2 is provided with a first horizontal portion 2-1, the circumferential edge of the second distributor 3 is provided with a second horizontal portion 3-1, and the circumferential edge of the third distributor 4 is provided with a third horizontal portion 4-1. The first horizontal portion 2-1, the second horizontal portion 3-1 and the third horizontal portion 4-1 are connected by a connecting rod 6. A lower connecting rod is installed at the bottom of the third horizontal portion 4-1. The bottom thread of the lower connecting rod is installed on a mounting block 7, and the mounting block 7 is arranged on the tube sheet 5.

[0039] In this embodiment, the first distributor 2 is provided with a plurality of first through holes, the second distributor 3 is provided with a plurality of second through holes, the third distributor 4 is provided with a plurality of third through holes, and the first through holes, the second through holes and the third through holes are arranged in a staggered manner;

[0040] A plurality of heat exchange tubes 12 are provided on the tube sheet 5 , and the inlets of the heat exchange tubes 12 are arranged corresponding to the third through holes.

[0041] In this embodiment, gaps are provided between the circumferential side walls of the first distributor 2 , the second distributor 3 and the third distributor 4 and the inner side wall of the upper tube box cylinder 8 .

[0042] In this embodiment, a plurality of through holes 1 - 4 are formed on the baffle 1 - 3 .

[0043] In this embodiment, the vertical rib plate 1-1 and the two half rib plates 1-2 are provided to form a cross-shaped structure and realize the arrangement of the four baffles 1-3; in addition, the flow area of ​​the liquid at the top pipe 11 at the liquid inlet is not affected;

[0044] An inclined baffle 1-3 is provided with a plurality of through holes 1-4, so as to divert the liquid at the top connecting pipe 11 and prevent the generation of eddy currents. When the liquid flow rate is large, part of the liquid can flow out from the through holes 1-4, and part of the liquid can flow along the baffle 1-3, thereby reducing the impact of the liquid on the baffle 1-3.

[0045] In this embodiment, the first distributor 2 is a circular plane distributor, the second distributor 3 and the third distributor 4 are both corrugated plate distributors, and the crests of the second distributor 3 and the troughs of the third distributor 4 are arranged correspondingly in order to ensure the uniform distribution of the liquid to the greatest extent. Through holes are opened on the three-layer distributors, and the arrangement of the through holes is staggered. The three-layer distributors are connected by connecting rods 6 to provide support, thereby improving the stability of the distributors;

[0046] In addition, gaps are provided between the circumferential side walls of the first distributor 2, the second distributor 3 and the third distributor 4 and the inner wall of the upper tube box cylinder 8, so that part of the liquid can also enter the heat exchange tube 12 near the shell 9 through the gaps, thereby avoiding the "dry wall phenomenon" in the heat exchange tube 12 at the boundary.

[0047] In this embodiment, the second distributor 3 and the third distributor 4 are both corrugated plate distributors, which are used to increase the strength and rigidity of the distributors, thereby improving the pressure bearing capacity of the distributors; on the other hand, they are used to promote turbulent flow of the liquid, thereby increasing the fluidity of the liquid. In addition, the crests of the second distributor 3 and the troughs of the third distributor 4 are arranged in correspondence, thereby increasing the fluidity of the liquid and making the liquid flow evenly distributed, thereby ensuring that the liquid entering the heat exchange tubes is even, thereby greatly improving the heat exchange performance of the shell and tube heat exchanger.

[0048] In this embodiment, the mounting block 7 is arranged at a mounting position of the tube sheet 5 and at an inlet of the heat exchange tube 12 in a staggered manner.

[0049] In summary, the utility model has a simple structure and a reasonable design. The baffle component is used to divert the liquid at the liquid inlet of the top pipe to prevent the generation of eddy currents. The first distributor, the second distributor and the third distributor are used to evenly distribute the liquid, thereby ensuring that the liquid entering the heat exchange tube is uniform, thereby greatly improving the heat exchange performance of the shell and tube heat exchanger.

[0050] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural change made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A combined distributor for a shell and tube heat exchanger, characterized in that: It comprises a shell (9), a tube sheet (5) connected to the end of the shell (9), and an upper tube box connected to the tube sheet (5), a baffle component (1) arranged at the liquid inlet of the upper tube box, and a combined distributor arranged in the upper tube box and located below the baffle component (1); The baffle component (1) comprises a vertical rib plate (1-1) arranged vertically, two half rib plates (1-2) symmetrically arranged on the front and rear sides of the vertical rib plate (1-1) and arranged in a cross shape, and four baffle plates (1-3) connected between the half rib plates (1-2) and the vertical rib plate (1-1) and arranged obliquely; The combined distributor comprises a first distributor (2), a second distributor (3) and a third distributor (4), wherein the first distributor (2) is a circular plane distributor, the second distributor (3) and the third distributor (4) are both corrugated plate distributors, and the wave crests of the second distributor (3) and the wave troughs of the third distributor (4) are arranged correspondingly.

2. A combined distributor for a shell and tube heat exchanger according to claim 1, characterized in that: The upper tube box comprises an upper tube box body (8) and an upper tube box head (10) formed integrally with the upper tube box body (8); a connecting flange (8-1) is provided at the end of the upper tube box body (8) close to the tube sheet (5); and the connecting flange (8-1) is connected to the protruding end of the tube sheet (5); A liquid inlet is provided at the center of the upper tube box sealing head (10), and a top connecting pipe (11) is provided at the liquid inlet; The tops of the vertical ribs (1-1) and the half ribs (1-2) are arc-shaped and adapted to the inner side walls of the upper tube box end cap (10), and the tops of the vertical ribs (1-1) and the half ribs (1-2) are welded to the inner side walls of the upper tube box end cap (10).

3. A combined distributor for a shell and tube heat exchanger according to claim 1, characterized in that: The first distributor (2) is provided with a first horizontal portion (2-1) on the circumferential edge, the second distributor (3) is provided with a second horizontal portion (3-1) on the circumferential edge, and the third distributor (4) is provided with a third horizontal portion (4-1) on the circumferential edge. The first horizontal portion (2-1), the second horizontal portion (3-1) and the third horizontal portion (4-1) are connected via a connecting rod (6). A lower connecting rod is installed at the bottom of the third horizontal portion (4-1). The bottom of the lower connecting rod is threadedly installed on a mounting block (7). The mounting block (7) is arranged on the tube sheet (5).

4. A combined distributor for a shell and tube heat exchanger according to claim 1, characterized in that: The first distributor (2) is provided with a plurality of first through holes, the second distributor (3) is provided with a plurality of second through holes, the third distributor (4) is provided with a plurality of third through holes, and the first through holes, the second through holes and the third through holes are arranged in a staggered manner; A plurality of heat exchange tubes (12) are provided on the tube plate (5), and the inlets of the heat exchange tubes (12) are arranged corresponding to the third through holes.

5. A combined distributor for a shell and tube heat exchanger according to claim 2, characterized in that: Gaps are provided between the circumferential side walls of the first distributor (2), the second distributor (3) and the third distributor (4) and the inner side wall of the upper tube box cylinder (8).

6. A combined distributor for a shell and tube heat exchanger according to claim 1, characterized in that: The baffle (1-3) is provided with a plurality of through holes (1-4).

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