Finned tube efficient heat exchanger

Abstract

The utility model relates to a finned tube efficient heat exchanger, and belongs to the technical field of heat exchangers. Comprising two tube boxes, a tube plate, a fastener, a support and a shell, the support is used for supporting the shell, the two tube boxes are arranged at the two ends of the shell through the tube plate and the fastener respectively, and the tube plate is used for fixing longitudinal fin heat exchange tubes. Longitudinal fin heat exchange tubes, baffle plates used for supporting the longitudinal fin heat exchange tubes, pipe spacers used for keeping the distance between the baffle plates, pull rods used for fixing the baffle plates and nuts used for locking the pull rods are arranged in a cavity defined by the tube plates and the shell. According to the utility model, the supporting problem of the longitudinal fin heat exchange tube in the equipment is solved, the stability of the tube bundle is ensured, and the operation reliability and the service life of the heat exchanger are improved.

Description

Technical Field

[0001] This utility model relates to a finned tube high-efficiency heat exchanger, belonging to the field of heat exchanger technology. Background Technology

[0002] Shell-and-tube heat exchangers are widely used heat exchange equipment in refining and chemical production. They mainly consist of tube bundles, tube sheets, shells, end caps, and baffles. The heat exchange tubes in the tube bundle are the core component of the shell-and-tube heat exchanger. The heat exchange tubes are fixed to the tube sheet at both ends, either by expansion joints or welding. One fluid flows inside the tubes, and the other flows outside, exchanging heat through the tube walls. Therefore, the outer surface area of ​​the tube walls effectively increases the heat exchanger's heat exchange capacity. Heat exchange tubes with longitudinal fins are one type of heat exchange tube that effectively increases the heat exchange area, but because of the fins, they cannot pass through ordinary baffles. Figure 5 and Figure 6 As shown; therefore, a baffle type suitable for longitudinal finned heat exchange tubes is needed, while also maintaining the support of the baffle for the heat exchange tubes. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a finned tube high-efficiency heat exchanger that solves the problem of supporting longitudinal finned heat exchange tubes inside the equipment, ensures the stability of the tube bundle, and improves the operational reliability and service life of the heat exchanger.

[0004] The present invention discloses a finned tube high-efficiency heat exchanger, comprising two tube boxes, a tube sheet, fasteners, supports, and a shell. The supports are used to support the shell. The two tube boxes are respectively placed at both ends of the shell through the tube sheet and fasteners. The tube sheet is used to fix the longitudinal finned heat exchange tubes. The cavity formed by the tube sheet and the shell is provided with longitudinal finned heat exchange tubes, baffles for supporting the longitudinal finned heat exchange tubes, spacer tubes for maintaining the spacing between the baffles, tie rods for fixing the baffles, and nuts for locking the tie rods.

[0005] The spacer tube is sleeved around the outer periphery of the tie rod. The baffles are arranged at intervals along the length of the shell. Each baffle is kept at a fixed distance by the spacer tube and locked in place by the tie rod and nut. The baffles have irregular holes with fin guide grooves. The shape of the fin guide grooves on the baffles matches the fin shape of the longitudinal finned heat exchange tube.

[0006] The fin guide grooves on the baffle plate are circular, elliptical, or rectangular in shape to accommodate the fins of longitudinal finned heat exchange tubes of different shapes.

[0007] The inner wall of the shell is provided with an insulation layer to reduce heat loss and improve the thermal efficiency of the heat exchanger.

[0008] The surface of the pull rod is provided with external threads matched with the internal threads of the nut, so that the stability of the baffle and the reliability of the overall structure are ensured by locking and fixing through the nut.

[0009] The material of the distance tube is stainless steel, carbon steel or alloy steel, so that the strength and corrosion resistance of the distance tube in a high-temperature and high-pressure environment are ensured.

[0010] The shell and the support are connected through welding.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The fin guiding groove on the baffle is matched with the fin shape of the longitudinal fin heat exchange pipe, and the baffle, the distance tube, the pull rod and the nut are combined and designed, so that the stability of the longitudinal fin heat exchange pipe is further improved, the vibration or displacement of the pipe bundle under the impact of fluid is prevented, the stability of the heat exchanger in the running process is ensured, the distance tube is sleeved on the outer periphery of the pull rod, the fixed distance between each baffle is ensured, the mutual collision or interference between the baffles is avoided, the orderliness and stability of the internal structure of the heat exchanger are maintained, the scouring and abrasion of the fluid on the heat exchange pipe and the baffle are reduced, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the front view structural schematic diagram of the embodiment 1 of the utility model;

[0014] Figure 2 is Figure 1 the A-A sectional view schematic diagram in the embodiment 1 of the utility model;

[0015] Figure 3 is Figure 1 the B-B sectional view schematic diagram in the embodiment 1 of the utility model;

[0016] Figure 4 is the front view structural schematic diagram of the baffle in the embodiment 1 of the utility model;

[0017] Figure 5 is the front view structural schematic diagram of the longitudinal fin heat exchange pipe;

[0018] Figure 6 is Figure 5 the C-C sectional view schematic diagram in the embodiment 1 of the utility model.

[0019] In the drawing: 1, tube box; 2, tube plate; 3, nut; 4, pull rod; 5, distance tube; 6, baffle; 7, shell; 8, longitudinal fin heat exchange pipe; 9, fastener; 10, support; 11, fin guiding groove. DETAILED DESCRIPTION

[0020] The utility model will be further described in combination with the embodiments as follows:

[0021] Embodiment 1

[0022] As Figures 1-4 shown, the finned tube high-efficiency heat exchanger includes two tube boxes 1, a tube plate 2, a fastener 9, a support 10 and a shell 7, the support 10 is used for supporting the shell 7, the two tube boxes 1 are arranged at two ends of the shell 7 through the tube plate 2 and the fastener 9 respectively, the tube plate 2 is used for fixing the longitudinal finned heat exchange tube 8, the longitudinal finned heat exchange tube 8, the baffle plate 6 used for supporting the longitudinal finned heat exchange tube 8, the distance tube 5 used for keeping the distance of the baffle plate 6, the pull rod 4 used for fixing the baffle plate 6 and the nut 3 used for locking the pull rod 4 are arranged in a cavity surrounded by the tube plate 2 and the shell 7;

[0023] The distance tube 5 is sleeved on the outer periphery of the pull rod 4, the baffle plates 6 are arranged at intervals along the length direction of the shell 7, each baffle plate 6 is kept at a fixed distance through the distance tube 5 and is locked and fixed through the pull rod 4 and the nut 3, the baffle plate 6 is provided with a special-shaped hole with a fin guide groove 11, and the shape of the fin guide groove 11 on the baffle plate 6 is matched with the shape of the fin of the longitudinal finned heat exchange tube 8.

[0024] The shape of the fin of the longitudinal finned heat exchange tube 8 is rectangular, and the shape of the fin guide groove 11 on the baffle plate 6 is rectangular.

[0025] The inner wall of the shell 7 is provided with a heat preservation layer, so as to reduce heat loss and improve the thermal efficiency of the heat exchanger.

[0026] The surface of the pull rod 4 is provided with external threads matched with the internal threads of the nut 3, so as to be locked and fixed through the nut 3, and the stability of the baffle plate 6 and the reliability of the overall structure are ensured.

[0027] The material of the distance tube 5 is stainless steel, so as to ensure the strength and corrosion resistance thereof in a high-temperature and high-pressure environment.

[0028] The shell 7 and the support 10 are connected through welding.

[0029] The installation process is as follows: firstly, the baffle 6 is placed in a predetermined position, and the wing guide groove 11 special hole is used to guide the longitudinal finned heat exchange tube 8 to be inserted; then, one end of the pull rod 4 is fixed on the right tube plate 2, one group of fixed distance tubes 5 is placed, one baffle 6 is placed, and the arrangement of the baffle 6 is sequentially completed; after the arrangement of the baffle 6 is completed, the nut 3 is locked at the end of the pull rod 4, and the stability of the baffle 6 is ensured; then, the longitudinal finned heat exchange tube 8 is sequentially inserted into the wing guide groove 11 special hole of each baffle 6 from the left side until the right tube plate 2; after all the longitudinal finned heat exchange tubes 8 are inserted, the assembled tube bundle is loaded into the shell 7, then the left tube plate 2 is assembled, the longitudinal finned heat exchange tube 8 is introduced into the left tube plate 2, and corresponding welding work is carried out, so that the connection between the heat exchange tube and the tube plate 2 is firm; finally, the shell 7 is assembled on the support 10, the assembled middle section is assembled with the left and right tube boxes 1 through the fastening piece 9, and the assembly of the finned tube high-efficiency heat exchanger is completed.

[0030] In the utility model, the description of the direction and relative position relation of the structure, such as the description of front, back, left, right, up and down, does not constitute the limitation of the utility model, and is only convenient for description.

Claims

1. A finned tube high efficiency heat exchanger, characterized by, The application relates to a heat exchanger, which comprises two tube boxes (1), a tube plate (2), fasteners (9), a support (10) and a shell (7), the support (10) is used for supporting the shell (7), the two tube boxes (1) are arranged at two ends of the shell (7) through the tube plate (2) and the fasteners (9), the tube plate (2) is used for fixing longitudinal finned heat exchange pipes (8), longitudinal finned heat exchange pipes (8), baffle plates (6) used for supporting the longitudinal finned heat exchange pipes (8), distance tubes (5) used for keeping the distance of the baffle plates (6), pull rods (4) used for fixing the baffle plates (6) and nuts (3) used for locking the pull rods (4) are arranged in cavities surrounded by the tube plate (2) and the shell (7); The distance tube (5) is sleeved on the outer periphery of the pull rod (4), the baffle plates (6) are arranged at intervals along the length direction of the shell (7), each baffle plate (6) is kept at a fixed distance through the distance tube (5) and is locked and fixed through the pull rod (4) and the nut (3), the baffle plate (6) is provided with a special-shaped hole with a fin guide groove (11), the fin guide groove (11) on the baffle plate (6) is matched with the fin shape of the longitudinal finned heat exchange pipe (8).

2. The finned tube high efficiency heat exchanger according to claim 1, wherein The shape of the fin guide groove (11) on the baffle plate (6) is circular, elliptical or rectangular, so as to adapt to the fins of longitudinal finned heat exchange pipes (8) with different shapes.

3. The finned tube high efficiency heat exchanger according to claim 1 or 2, characterized by, The inner wall of the shell (7) is provided with a heat preservation layer.

4. The finned tube high efficiency heat exchanger according to claim 3, wherein The surface of the pull rod (4) is provided with external threads matched with the internal threads of the nut (3).

5. The finned tube high efficiency heat exchanger according to claim 4, wherein The material of the distance tube (5) is stainless steel, carbon steel or alloy steel.

6. The finned tube high efficiency heat exchanger according to claim 5, wherein The shell (7) and the support (10) are connected through welding.

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