Double-layer winding pipe efficient heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly discloses a double-layer winding pipe efficient heat exchanger which comprises an outer shell, the front end and the rear end of the outer shell are connected with a front end cover and a rear end cover respectively, the inner side of the outer shell is fixedly connected with an inner shell, and the inner shell is sleeved with a first spiral pipe and a second spiral pipe. A shell pass medium inlet and a shell pass medium outlet are formed in the two ends of the outer shell respectively, and an auxiliary shell pass inlet and an auxiliary shell pass outlet are formed in the inner shell; the two ends of the first spiral tube and the second spiral tube penetrate through the outer shell, a first tube pass inlet and a first tube pass outlet are formed in the two ends of the first spiral tube respectively, and a second tube pass inlet and a second tube pass outlet are formed in the two ends of the second spiral tube respectively; double-shell-pass and double-tube-pass heat exchange can be formed, the heat transfer dead zone is low, the circulation resistance is small, the heat transfer space and fluid kinetic energy can be effectively utilized, and the comprehensive heat exchange performance of the heat exchanger is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger technical field, concretely relates to a double -layer winding pipe high -efficient heat exchanger. BACKGROUND

[0002] As a kind of heat exchange equipment, heat exchanger occupies important position in petrochemical industry, especially for how can effectively utilize heat source in higher energy consumption industry, try to reduce heat loss, heat exchanger plays an important role therein.In recent years, with the development of society, the progress of science and technology, double-pipe heat exchanger is very common in petrochemical industry with its own structural advantages.

[0003] Although double-pipe heat exchanger is safe and reliable, long service life, but because welding will cause thermal expansion cracking, most of the inner tube of double-pipe heat exchanger does not allow to use welding, and most of the double-pipe heat exchanger selects bending, disc to be coiled into the shape of snake pipe, so more special corrosion-resistant materials cannot be used for material manufacturing;And the heat exchange area of the heat exchanger with single sleeve structure is small, cannot meet the demand of structural large-scale, under some high temperature, high pressure or strong corrosive conditions, the material selection of traditional single sleeve heat exchanger is limited, and the heat exchange efficiency is not high, prone to heat transfer dead zone and large flow resistance problems. INVENTION CONTENTS

[0004] In view of the smaller heat exchange area of heat exchanger in prior art, the heat exchange efficiency needs to be improved, a double-layer winding pipe high-efficiency heat exchanger is provided.The utility model provides the following technical scheme:

[0005] A double-layer winding pipe high-efficiency heat exchanger, comprising an outer shell, the front and rear ends of the outer shell are connected with front end cover and rear end cover respectively, the inner side of the outer shell is fixedly connected with an inner shell, the outer shell is provided with a first spiral pipe and a second spiral pipe;The two ends of the outer shell are respectively provided with shell side medium inlet and shell side medium outlet, the inner shell is provided with a vice shell side inlet at one end close to the shell side medium inlet, and is provided with a vice shell side outlet at one end close to the shell side medium outlet;The two ends of the first spiral pipe and the second spiral pipe all pass through the outer shell, and the two ends of the first spiral pipe are respectively provided with first tube side inlet and first tube side outlet, and the two ends of the second spiral pipe are respectively provided with second tube side inlet and second tube side outlet.

[0006] Preferably, the first spiral pipe and the second spiral pipe are coaxial, have same diameter and are arranged in same spiral direction.

[0007] Preferably, the first spiral pipe and the second spiral pipe are both spaced apart and sleeved on the outer side of the inner shell.

[0008] Preferably, the first spiral pipe comprises a first front connecting part, a first spiral part and a first rear connecting part from front to rear, and the front end cover is provided with a first front mounting hole for the first front connecting part to pass through, and the rear end cover is provided with a first rear mounting hole for the first rear connecting part to pass through.

[0009] Preferably, the second spiral pipe comprises a second front connecting part, a second spiral part and a second rear connecting part from front to rear, and the front end cover is provided with a second front mounting hole for the second front connecting part to pass through, and the rear end cover is provided with a second rear mounting hole for the second rear connecting part to pass through.

[0010] Preferably, the end of the first spiral pipe and the second spiral pipe is provided with a pipe joint.

[0011] Preferably, the shell side medium inlet and the shell side medium outlet are arranged on the same side of the outer shell.

[0012] Preferably, the shell side medium inlet and the shell side medium outlet are arranged symmetrically.

[0013] Preferably, the inner shell is a circular pipe, the secondary shell side inlet is arranged at the axial end of the inner shell, and the secondary shell side outlet is arranged at the side of the inner shell.

[0014] Preferably, the secondary shell side outlet is symmetrically provided with two.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. Through the combination of double shell side and double tube side heat exchange design and spiral flow and axial flow, the comprehensive heat exchange performance of the heat exchanger is significantly improved.

[0017] 2. The ordinary structure single set pipe heat exchanger is broken through in manufacturing material selection, so that it can be applied to more kinds of materials.

[0018] 3. Through reasonable structure design and medium flow layout, the heat transfer dead zone and internal flow resistance are effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the overall structure schematic view of the utility model;

[0020] Figure 2 is the structure schematic view of the first spiral pipe and the second spiral pipe of the utility model;

[0021] In the drawings, 1 is an outer shell, 11 is a shell side medium inlet, 12 is a shell side medium outlet, 2 is an inner shell, 21 is a secondary shell side inlet, 22 is a secondary shell side outlet, 3 is a front end cover, 4 is a rear end cover, 5 is a first spiral pipe, 501 is a first tube side inlet, 502 is a first tube side outlet, 51 is a first front connecting part, 52 is a first spiral part, 53 is a first rear connecting part, 6 is a second spiral pipe, 601 is a second tube side inlet, 602 is a second tube side outlet, 61 is a second front connecting part, 62 is a second spiral part, and 63 is a second rear connecting part. DETAILED DESCRIPTION

[0022] The directional words mentioned in the following examples, such as “up”, “down”, “left”, “right”, etc., are only the directions of the drawings, so the directional words used are used to illustrate and not to limit the utility model creation.

[0023] As shown in Figure 1 and Figure 2 A double-layer spiral pipe high-efficiency heat exchanger includes an outer shell 1, the outer shell 1 is connected with a front end cover 3 and a rear end cover 4 at the front and rear ends respectively, an inner shell 2 is fixedly connected to the inner side of the outer shell 1, and the inner shell 2 is sleeved with a first spiral pipe 5 and a second spiral pipe 6; the outer shell 1 is provided with a shell side medium inlet 11 and a shell side medium outlet 12 at the two ends respectively, the inner shell 2 is provided with a secondary shell side inlet 21 at one end close to the shell side medium inlet 11 and a secondary shell side outlet 22 at one end close to the shell side medium outlet 12; the two ends of the first spiral pipe 5 and the second spiral pipe 6 pass through the outer shell 1, and the two ends of the first spiral pipe 5 are provided with a first tube side inlet 501 and a first tube side outlet 502 respectively, and the two ends of the second spiral pipe 6 are provided with a second tube side inlet 601 and a second tube side outlet 602 respectively; double shell sides and double tube sides can be formed to exchange heat, the medium in the shell side heat exchange space forms spiral flow and axial flow at the same time, the heat transfer dead zone is low, the flow resistance is small, the heat transfer space and fluid kinetic energy can be effectively utilized, and the comprehensive heat exchange performance of the heat exchanger is improved; in addition, the structure of the device is relatively simple, the manufacturing material selection of the ordinary structure single set pipe heat exchanger can be broken through, and more materials are suitable.

[0024] Specifically, the shell side medium inlet 11 and the secondary shell side inlet 21 are arranged on the rear side, the shell side medium outlet 12 and the secondary shell side outlet 22 are arranged on the front side, the first tube side inlet 501 and the second tube side inlet 601 are arranged on the front side, and the first tube side outlet 502 and the second tube side outlet 602 are arranged on the rear side, so that the tube side medium and the shell side medium can form pure counterflow heat exchange, and the heat exchange efficiency is effectively improved.

[0025] Further, the first spiral pipe 5 and the second spiral pipe 6 are coaxial, have the same pipe diameter, have the same diameter, and are arranged in the same spiral direction, and the first spiral pipe 5 and the second spiral pipe 6 form a double pipe channel; the first spiral pipe 5 and the second spiral pipe 6 are both spaced and sleeved outside the inner shell 2, and the shell channel medium can flow in the gap between the pipe channel and the inner shell 2 and between the first spiral pipe 5 and the second spiral pipe 6, so that a spiral flow can be formed for sufficient heat exchange, the heat transfer dead zone is minimized, the flow resistance is smaller, the heat transfer space and fluid kinetic energy can be more effectively utilized, and the heat exchange efficiency of the heat exchanger is greatly improved.

[0026] Specifically, the first spiral pipe 5 sequentially includes a first front connecting portion 51, a first spiral portion 52, and a first rear connecting portion 53 from front to back, the front end cover 3 is provided with a first front mounting hole for the first front connecting portion 51 to pass through, and the rear end cover 4 is provided with a first rear mounting hole for the first rear connecting portion 53 to pass through, so that the installation and disassembly of the first spiral pipe 5 are more convenient and fast, and the maintenance and replacement of the equipment are facilitated.

[0027] Specifically, the second spiral pipe 6 sequentially includes a second front connecting portion 61, a second spiral portion 62, and a second rear connecting portion 63 from front to back, the front end cover 3 is provided with a second front mounting hole for the second front connecting portion 61 to pass through, and the rear end cover 4 is provided with a second rear mounting hole for the second rear connecting portion 63 to pass through, and similarly, such a structure design also facilitates the installation and disassembly of the second spiral pipe 6 and improves the maintainability of the equipment.

[0028] The first front connecting portion 51, the first rear connecting portion 53, the second front connecting portion 61, and the second rear connecting portion 63 are provided with pipe joints, so that the connection of the heat exchanger is more firm and reliable, and meanwhile, the connection and integration with other equipment are facilitated.

[0029] Further, the outer shell 1 is provided with a shell channel medium inlet 11 and a shell channel medium outlet 12 at two ends respectively, the inner shell 2 is in a circular tube shape, is provided with a secondary shell channel inlet 21 at one end close to the shell channel medium inlet 11, and is provided with a secondary shell channel outlet 22 at one end close to the shell channel medium outlet 12, and such a structure can form a double shell channel, so that the shell channel medium simultaneously forms an axial flow in the same direction in the outer shell 1 and the inner shell 2 for sufficient heat exchange, the flow resistance is small, the heat transfer space can be effectively utilized for heat transfer, and the heat transfer efficiency of the heat exchanger is greatly improved.

Claims

1. A double-wound pipe high-efficiency heat exchanger, characterized in that, The utility model relates to a heat exchanger, including outer casing (1), the outer casing (1) front and rear ends are connected with front end cover (3) and rear end cover (4) respectively, the inner side fixed connection of outer casing (1) has inner casing (2), the outer sleeve of inner casing (2) is equipped with first spiral pipe (5) and second spiral pipe (6), the both ends of outer casing (1) are provided with shell medium inlet (11) and shell medium outlet (12) respectively, the one end of inner casing (2) is provided with vice shell inlet (21) near shell medium inlet (11), and the one end of inner casing (2) is provided with vice shell outlet (22) near shell medium outlet (12), the both ends of first spiral pipe (5) and second spiral pipe (6) all pass through outer casing (1), and the both ends of first spiral pipe (5) are provided with first pipe inlet (501) and first pipe outlet (502) respectively, and the both ends of second spiral pipe (6) are provided with second pipe inlet (601) and second pipe outlet (602) respectively.

2. The double-wound pipe high-efficiency heat exchanger according to claim 1, characterized in that, The first spiral pipe (5) and the second spiral pipe (6) are coaxial, have the same diameter and are arranged in the same spiral direction.

3. The double-wound pipe high-efficiency heat exchanger according to claim 1 or 2, characterized in that, The first spiral pipe (5) and the second spiral pipe (6) are spaced apart and sleeved outside the inner casing (2).

4. The double-wound pipe high-efficiency heat exchanger according to claim 1, characterized in that, The first spiral pipe (5) sequentially comprises a first front connecting portion (51), a first spiral portion (52) and a first rear connecting portion (53) from front to back, the front end cover (3) is provided with a first front mounting hole for the first front connecting portion (51) to pass through, and the rear end cover (4) is provided with a first rear mounting hole for the first rear connecting portion (53) to pass through.

5. The double-wound pipe high-efficiency heat exchanger according to claim 4, characterized in that, The second spiral pipe (6) sequentially comprises a second front connecting portion (61), a second spiral portion (62) and a second rear connecting portion (63) from front to back, the front end cover (3) is provided with a second front mounting hole for the second front connecting portion (61) to pass through, and the rear end cover (4) is provided with a second rear mounting hole for the second rear connecting portion (63) to pass through.

6. The double-wound pipe high-efficiency heat exchanger according to claim 1, characterized in that, Pipe joints are mounted at the ends of the first spiral pipe (5) and the second spiral pipe (6).

7. The double-wound pipe high-efficiency heat exchanger according to claim 1, characterized in that, The shell medium inlet (11) and the shell medium outlet (12) are arranged on the same side of the outer casing (1).

8. The double-wound pipe high-efficiency heat exchanger according to claim 1 or 7, characterized in that, The shell medium inlet (11) and the shell medium outlet (12) are symmetrically arranged front and back.

9. The double-wound pipe high-efficiency heat exchanger according to claim 1, characterized in that, The inner casing (2) is in the shape of a circular tube, the vice shell inlet (21) is arranged at an axial end of the inner casing (2), and the vice shell outlet (22) is arranged at a side of the inner casing (2).

10. The double-wound pipe high-efficiency heat exchanger according to claim 9, characterized in that, The vice shell outlet (22) is symmetrically provided with two.

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