Fixed tube plate type heat exchange equipment

Abstract

The utility model relates to fixed tube plate type heat exchange equipment, which belongs to the technical field of heat exchangers and comprises a tube box, two first sealing plates are arranged in the tube box, and a cavity in the tube box is divided into a first chamber, a second chamber and a third chamber by the two first sealing plates along the length direction of the tube box. The first cavity and the second cavity are located on the two sides of the third cavity respectively, a second sealing plate is arranged in the first cavity and divides the first cavity into an input cavity and an output cavity, and a tube pass inlet and a tube pass outlet are formed in the tube box. The shell pass fluid is divided into a plurality of independent streams by the third cavity through the partition plates, so that the streams sequentially pass through the third cavity, the flow path is shortened, the flow velocity and the flow resistance of the shell pass fluid are reduced, the shell pass fluid obtains the minimum pressure drop, the process requirement is met, and in addition, due to the fact that the gaps are formed between the partition plates and the inner wall of the tube box, the flow rate of the shell pass fluid is reduced. And stress concentration can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fixed tube sheet type heat exchange equipment belongs to heat exchanger technical field. BACKGROUND

[0002] The fixed tube sheet type heat exchanger is a shell and tube heat exchanger with the shell fixedly connected through welding at both ends of the tube bundle. The tube sheet and the shell can also be used as a flange after welding, and are connected with the tube box flange through bolts. In the fixed tube sheet type heat exchanger, fluids at different temperatures flow through the tube side and the shell side, and heat exchange is completed through heat exchange. The advantage is that the structure is simple, and the inner diameter of the shell required is the smallest under the condition of ensuring equal heat transfer surface.

[0003] The Chinese invention patent with the publication number CN116907243A discloses a fixed tube sheet type heat exchanger, which comprises a shell, a support, a shell side medium inlet, a shell side medium outlet, a tube side medium inlet and a tube side medium outlet are arranged on the shell, two mutually parallel tube sheets and a plurality of heat exchange tubes are arranged in the shell, the outer side walls of the two tube sheets are provided with tube boxes, the tube sheet plane is parallel to the axis of the shell, the heat exchange tubes are fixedly penetrated through the two tube sheets, the two ends of the heat exchange tubes are communicated with the two tube boxes, and the axis of the heat exchange tubes is perpendicular to the tube sheet plane. The fixed tube sheet type heat exchanger has the advantages that the tube sheet plane is parallel to the axis of the shell, the axis of the heat exchange tubes is perpendicular to the tube sheet plane, the length of the heat exchange tubes is reduced, the heat exchange area is increased, and the heat exchange efficiency is improved. Moreover, the heat exchange area and the heat exchange efficiency are further improved through the fins. However, in the prior art, a large pressure drop is generated during the working process, which often cannot meet the process requirements, and therefore the use of the fixed tube sheet type heat exchanger in devices with high pressure drop requirements has certain limitations.

[0004] Therefore, there is a need for a fixed tube sheet type heat exchange equipment that can reduce the flow resistance of the fluid and reduce the pressure drop of the fluid. SUMMARY

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a fixed tube sheet type heat exchange equipment that can reduce the flow resistance of the fluid and reduce the pressure drop of the fluid.

[0006] The utility model discloses a technical scheme that solves the above problems is as follows: A fixed tube sheet heat exchange equipment, including pipe box, be provided with two first sealing plate in the pipe box, two first sealing plate will the cavity in the pipe box along the length direction of pipe box and divide into first chamber, second chamber and third chamber, first chamber and second chamber are located at two sides of third chamber respectively, be provided with second sealing plate in first chamber, second sealing plate divides into input chamber and output chamber, be provided with pipe pass inlet and pipe pass outlet on the pipe box, pipe pass inlet and pipe pass outlet communicate with input chamber and output chamber respectively, be provided with baffle in third chamber, set up the gap between the inner wall of baffle and pipe box, baffle is fixedly connected with first sealing plate, baffle will third chamber along the length direction of pipe box and divide into multiple heat exchange chambers, be provided with multiple shell pass inlets and multiple shell pass outlets on the pipe box, multiple shell pass inlets, multiple shell pass outlets and multiple heat exchange chambers are one-to-one correspondence, pipe pass inlet and pipe pass outlet all communicate with heat exchange chamber,

[0007] Be provided with multiple heat exchange pipes in the pipe box, and the heat exchange pipe passes through third chamber and two first sealing plate in proper order, and the heat exchange pipe is fixedly connected with first sealing plate, and input chamber communicates with second chamber through heat exchange pipe, and output chamber communicates with second chamber through heat exchange pipe.

[0008] As preferred, the baffle is provided with multiple, multiple baffles are spaced along the length direction of the pipe box.

[0009] As preferred, the number of baffles is five.

[0010] As preferred, the third chamber is provided with a support rod, the support rod is fixedly arranged on the first sealing plate, and the support rod is fixedly arranged through the baffle.

[0011] As preferred, the pipe pass outlet and the shell pass inlet are located on the same side of the pipe box, and the pipe pass inlet and the shell pass outlet are located on the same side of the pipe box.

[0012] As preferred, the pipe pass outlet and the pipe pass inlet are arranged in an up-down manner, and the shell pass inlet and the shell pass outlet are arranged in an up-down manner.

[0013] As preferred, multiple heat exchange pipes are arranged side by side.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model discloses a fixed tube sheet heat exchange equipment, through the baffle, the third chamber divides the shell fluid into multiple separate streams, so that each stream of fluid sequentially passes through the third chamber, shortens the process, reduces the shell fluid flow rate and flow resistance, so that the shell fluid obtains the minimum pressure drop, meets the process requirement, and because the gap is arranged between the baffle and the inner wall of the pipe box, stress concentration can be avoided.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of the fixed tube sheet type heat exchange equipment of the utility model;

[0017] Figure 2 It is Figure 1 A part enlarged view of the fixed tube sheet type heat exchange equipment.

[0018] Among them:

[0019] Pipe box 1, first sealing plate 2, first chamber 3, second chamber 4, third chamber 5, second sealing plate 6, tube pass inlet 7, tube pass outlet 8, baffle 9, shell pass inlet 10, shell pass outlet 11, support rod 12, heat exchange pipe 13;

[0020] Input cavity 301, output cavity 302;

[0021] Heat exchange cavity 501. DETAILED DESCRIPTION

[0022] As Figures 1-2 shown, the fixed tube sheet type heat exchange equipment in the embodiment includes pipe box 1, two first sealing plates 2 are arranged in the pipe box 1, the two first sealing plates 2 divide the cavity in the pipe box 1 into first chamber 3, second chamber 4 and third chamber 5 along the length direction of the pipe box 1, the first chamber 3 and the second chamber 4 are respectively located at both sides of the third chamber 5, the second sealing plate 6 is arranged in the first chamber 3, the second sealing plate 6 divides the first chamber 3 into input cavity 301 and output cavity 302, the tube pass inlet 7 and the tube pass outlet 8 are arranged on the pipe box 1, and the tube pass inlet 7 and the tube pass outlet 8 are respectively communicated with the input cavity 301 and the output cavity 302;

[0023] The baffle 9 is arranged in the third chamber 5, the baffle 9 is provided in plurality, the plurality of baffles 9 are distributed at intervals along the length direction of the pipe box 1, the specific number of the baffle 9 is five, the gap is arranged between the baffle 9 and the inner wall of the pipe box 1, the baffle 9 is fixedly connected with the first sealing plate 2, the baffle 9 divides the third chamber 5 into a plurality of heat exchange cavities 501 along the length direction of the pipe box 1, a plurality of shell pass inlets 10 and a plurality of shell pass outlets 11 are arranged on the pipe box 1, the plurality of shell pass inlets 10, the plurality of shell pass outlets 11 and the plurality of heat exchange cavities 501 are one-to-one corresponding, and the tube pass inlet 7 and the tube pass outlet 8 are communicated with the heat exchange cavity 501;

[0024] The support rod 12 is arranged in the third chamber 5, the support rod 12 is fixedly arranged on the first sealing plate 2, and the support rod 12 fixedly penetrates the baffle 9;

[0025] The pipe box 1 is provided with a plurality of heat exchange pipes 13, the plurality of heat exchange pipes 13 are arranged side by side, the heat exchange pipes 13 pass through the third chamber 5 and the two first sealing plates 2 in sequence, the heat exchange pipes 13 are fixedly connected with the first sealing plates 2, the input cavity 301 is communicated with the second chamber 4 through the heat exchange pipes 13, and the output cavity 302 is communicated with the second chamber 4 through the heat exchange pipes 13;

[0026] The pipe passage outlet 8 and the shell passage inlet 10 are located on the same side of the pipe box 1, the pipe passage inlet 7 and the shell passage outlet 11 are located on the same side of the pipe box 1, and specifically, the pipe passage outlet 8 and the pipe passage inlet 7 are distributed in an up-down mode, and the shell passage inlet 10 and the shell passage outlet 11 are distributed in an up-down mode.

[0027] During work, the pipe passage fluid enters the input cavity 301 from the pipe passage inlet 7, is then transported to the second chamber 4 from part of the heat exchange pipes 13, the pipe passage fluid in the second chamber 4 is then transported to the output cavity 302 from other heat exchange pipes 13, and finally, the pipe passage fluid in the output cavity 302 flows out from the pipe passage outlet 8, and simultaneously, the shell passage fluid enters the heat exchange cavity 501 from the shell passage inlet 10, and the shell passage fluid in the heat exchange cavity 501 flows out from the shell passage outlet 11, wherein the third chamber 5 divides the shell passage fluid into a plurality of separate flow streams by the partition plate 9, so that each flow stream sequentially passes through the third chamber 5, the flow process is shortened, the flow speed and flow resistance of the shell passage fluid are reduced, the shell passage fluid obtains the minimum pressure drop, and the process requirement is met.

[0028] In addition, the gap between the partition plate 9 and the inner wall of the pipe box 1 can avoid stress concentration.

[0029] The pipe passage outlet 8 and the pipe passage inlet 7 are distributed in an up-down mode, and the shell passage inlet 10 and the shell passage outlet 11 are distributed in an up-down mode, so that the flow directions of the shell passage fluid and the pipe passage fluid along the diameter direction of the pipe box 1 are opposite, and the heat exchange between the shell passage fluid and the pipe passage fluid is facilitated.

[0030] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and the technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the utility model claims.

Claims

1. A fixed tube sheet heat exchange device, comprising a tube sheet (1), two first sealing plates (2) are arranged in the tube sheet (1), the two first sealing plates (2) divide a cavity in the tube sheet (1) into a first chamber (3), a second chamber (4) and a third chamber (5) along the length direction of the tube sheet (1), the first chamber (3) and the second chamber (4) are respectively located on the two sides of the third chamber (5), a second sealing plate (6) is arranged in the first chamber (3), the second sealing plate (6) divides the first chamber (3) into an input chamber (301) and an output chamber (302), a tube side inlet (7) and a tube side outlet (8) are arranged on the tube sheet (1), the tube side inlet (7) and the tube side outlet (8) are respectively communicated with the input chamber (301) and the output chamber (302), characterized in that: The third chamber (5) is provided with a partition plate (9), a gap is arranged between the partition plate (9) and the inner wall of the tube box (1), the partition plate (9) is fixedly connected with the first sealing plate (2), the partition plate (9) divides the third chamber (5) into a plurality of heat exchange cavities (501) along the length direction of the tube box (1), a plurality of shell side inlets (10) and a plurality of shell side outlets (11) are arranged on the tube box (1), the plurality of shell side inlets (10), the plurality of shell side outlets (11) and the plurality of heat exchange cavities (501) are one-to-one corresponding, and the tube side inlet (7) and the tube side outlet (8) are in communication with the heat exchange cavities (501). A plurality of heat exchange pipes (13) are arranged in the tube box (1), the heat exchange pipes (13) pass through the third chamber (5) and the two first sealing plates (2) in sequence, the heat exchange pipes (13) are fixedly connected with the first sealing plates (2), the input cavity (301) is in communication with the second chamber (4) through the heat exchange pipes (13), and the output cavity (302) is in communication with the second chamber (4) through the heat exchange pipes (13).

2. A fixed tube sheet heat exchange apparatus according to claim 1, wherein: The partition plate (9) is provided in plurality, and the plurality of partition plates (9) are distributed at intervals along the length direction of the tube box (1).

3. A fixed tube sheet heat exchange apparatus according to claim 2, wherein: The number of the partition plates (9) is five.

4. A fixed tube sheet heat exchange apparatus according to claim 1, wherein: The third chamber (5) is provided with a support rod (12), the support rod (12) is fixedly arranged on the first sealing plate (2), and the support rod (12) fixedly passes through the partition plate (9).

5. A fixed tube sheet heat exchange apparatus according to claim 1, wherein: The tube side outlet (8) and the shell side inlet (10) are located on the same side of the tube box (1), and the tube side inlet (7) and the shell side outlet (11) are located on the same side of the tube box (1).

6. A fixed tube sheet heat exchange apparatus according to claim 5, wherein: The tube side outlet (8) and the tube side inlet (7) are distributed up and down, and the shell side inlet (10) and the shell side outlet (11) are distributed up and down.

7. A fixed tube sheet heat exchange apparatus according to claim 1, wherein: The plurality of heat exchange pipes (13) are arranged side by side.

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