Core-pulling type winding pipe type heat exchanger

Abstract

A core-pulling type winding pipe heat exchanger comprises a shell pass barrel, a shell pass barrel, a core-pulling type winding pipe heat exchanger and a core-pulling type winding pipe heat exchanger, and is characterized in that the shell pass barrel is vertically arranged; the heat exchange core body is inserted into the shell pass cylinder through the opening and comprises an upper tube plate, a lower tube plate and a heat exchange core body; the hollow pipeline is vertically arranged in the shell pass barrel, the upper end opening of the hollow pipeline serves as a tube pass inlet to be supported on the upper tube plate, and the lower end opening of the hollow pipeline is a free end opening; the lower pipe plate and the lower end of the pipeline are restrained together; the lower tube box is arranged below the lower tube plate; the heat exchange tube is spirally wound on the periphery of the pipeline, an upper port of the heat exchange tube is supported on the upper tube plate, a lower port of the heat exchange tube is supported on the lower tube plate, and the heat exchange tube is communicated with the lower tube box; and the upper tube box is arranged on the upper tube plate by avoiding the upper end opening of the pipeline and is communicated with the upper end opening of the heat exchange tube, and the upper tube box is provided with a tube pass outlet. Compared with the prior art, the heat exchange efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger technical field, concretely relates to a kind of core extraction type winding pipe heat exchanger. BACKGROUND

[0002] At present, large winding pipe heat exchanger in petrochemical industry is mostly fixed tube sheet type non-detachable structure. Regular cleaning generally uses chemical circulation cleaning, which is good for general medium, but may not be effective for medium with high viscosity.

[0003] To facilitate cleaning, the present application designs a core extraction type winding pipe heat exchanger, such as Chinese utility model patent No. 201920654173.3, "winding pipe heat exchanger" (authorized publication number CN209945069U), which includes shell side cylinder, core, upper tube plate and upper tube box head. The shell side cylinder is vertically arranged and has a cavity inside. The shell side cylinder is provided with a shell side inlet and a shell side outlet connected to the cavity. The core is vertically arranged in the cavity. The core includes heat exchange pipes wound from inside to outside to form multiple pipe layers. The upper tube plate is arranged at the top of the shell side cylinder. The upper end of the heat exchange pipe is limited on the upper tube plate. The upper tube box head is arranged on the upper tube plate and forms a first inner cavity with the upper tube plate. The core is detachably connected to the shell side cylinder. The floating tube plate is located at the bottom of the core. The lower end of the heat exchange pipe is limited on the floating tube plate. The lower part of the floating tube plate is connected to the lower tube box head. The lower tube box head and the floating tube plate form a second inner cavity. The upper tube plate is axially provided with N first partitions. N is a natural number greater than 0. The first partitions separate the first inner cavity into at least two first tube pass cavities. Each first tube pass cavity is connected to the upper end of the corresponding pipe layer of the heat exchange pipe. The floating tube plate is axially provided with N-1 second partitions parallel to the first partitions. The second partitions are distributed in a staggered manner with the first partitions. The second partitions separate the second inner cavity into at least one second tube pass cavity. Each second tube pass cavity is connected to the lower end of the corresponding pipe layer of the heat exchange pipe. The heat exchange pipe, the first tube pass cavity and the second tube pass cavity form a multi-tube pass channel for the tube pass medium to flow back and forth. The multi-tube pass is an even number of tube passes. The first tube pass connector and the second tube pass connector are arranged on the upper tube box head and connected to the corresponding tube pass cavity in the first inner cavity. In this way, the tube pass medium can participate in heat exchange multiple times in the heat exchange pipe. The first tube pass connector and the second tube pass connector are arranged on the same side of the shell side cylinder, which facilitates the overall disassembly of the core.

[0004] In the above-mentioned patent, the tube pass medium and the shell pass medium flow in the same direction, which may affect the heat exchange efficiency to some extent, and needs to be further improved. UTILITY MODEL CONTENTS

[0005] The first technical problem to be solved by the utility model is to provide a core-drawable winding pipe type heat exchanger to improve heat exchange efficiency.

[0006] The second technical problem to be solved by the utility model is to provide a core-drawable winding pipe type heat exchanger to improve structural stability.

[0007] The technical scheme adopted by the utility model to solve the above first technical problem is as follows: a core-drawable winding pipe type heat exchanger comprises:

[0008] The shell side cylinder is vertically arranged and has an open upper end, and the upper part of the shell side cylinder is provided with a shell side inlet and the lower part is provided with a shell side outlet;

[0009] The heat exchange core is inserted into the shell side cylinder through the open end;

[0010] The heat exchange core comprises:

[0011] The upper tube plate is arranged on the open end of the shell side cylinder to close the open end and is connected to the shell side cylinder in a detachable manner;

[0012] The hollow pipeline is vertically arranged in the shell side cylinder, and the upper end of the pipeline is supported on the upper tube plate as a tube side inlet, and the lower end of the pipeline is a free end;

[0013] The lower tube plate is horizontally arranged below the pipeline in the shell side cylinder and is connected to the lower end of the pipeline;

[0014] The lower tube box is arranged below the lower tube plate, and the internal space of the lower tube box is connected to the lower end of the pipeline through the through hole in the lower tube plate;

[0015] The heat exchange pipe is spirally wound around the outer periphery of the pipeline, and the upper end of the heat exchange pipe is supported on the upper tube plate, and the lower end of the heat exchange pipe is supported on the lower tube plate and is connected to the lower tube box;

[0016] The upper tube box is arranged on the upper tube plate away from the upper end of the pipeline and is connected to the upper end of the heat exchange pipe, and the upper tube box is provided with a tube side outlet.

[0017] In this way, the tube side medium enters the pipeline through the upper end of the pipeline, flows downward into the lower tube box, then enters the heat exchange pipe, and spirally flows upward in the heat exchange pipe, exchanges heat with the shell side medium flowing downward in the shell side cylinder, the flow directions of the tube side medium and the shell side medium are opposite in the heat exchange process, pure counterflow heat exchange is realized, and the heat exchange efficiency is greatly improved. After the heat exchange is completed, the heat exchange core is lifted upward and separated from the shell side cylinder, which facilitates disassembly, cleaning and quick replacement of the heat exchange core and reduces downtime.

[0018] Preferably, the outer peripheral wall of the upper end of the shell side cylinder is provided with a flange, and the upper tube plate is detachably connected with the flange through fasteners.

[0019] Further, a gasket is provided between the sealing surface of the flange and the lower surface of the upper tube plate, and is in sealing cooperation with the sealing surface of the flange and the lower surface of the upper tube plate.

[0020] Preferably, the fasteners are bolts.

[0021] Through the cooperation of the fasteners, the flange, the gasket and the upper tube plate, the sealing performance can be improved, the leakage of the heat exchange medium can be avoided, and the disassembly and assembly are facilitated.

[0022] Preferably, the pipeline has a first straight pipe section extending downward from the upper tube plate, a second straight pipe section extending upward from the lower tube plate, and a connecting section connecting the first and second straight pipe sections, the extension length of the first straight pipe section is less than the extension length of the second straight pipe section, and the first and second straight pipe sections are arranged in a staggered manner in the up-down direction.

[0023] The heat exchange pipe is spirally wound around the outer periphery of the second straight pipe section.

[0024] In this way, the upper end of the pipeline and the upper end of the heat exchange pipe can be arranged separately on the upper tube plate, and the heat exchange pipe can be spirally wound around the outer periphery of the pipeline without affecting the heat exchange pipe.

[0025] Preferably, the first straight pipe section has at least two and is arranged in a spaced manner on the lower side of the upper tube plate, and the lower end of each first straight pipe section is connected to the upper end of the same second straight pipe section through a corresponding connecting section. Thus, the tube-side medium entering from each first straight pipe section is collected into the second straight pipe section.

[0026] Of course, in addition to this, the first straight pipe section can also have only one.

[0027] Preferably, the upper tube box is arranged at the central position of the upper tube plate corresponding to the upper end of the second straight pipe section, each first straight pipe section is arranged at the peripheral position of the upper tube plate in a circumferential direction, and each connecting section is in the form of an elbow pipe.

[0028] In order to further improve the heat exchange efficiency, preferably, the shell side outlet is arranged at the bottom of the shell side cylinder and below the lower tube box, and the shell side inlet is arranged at the upper part of the side wall of the shell side cylinder and above the second straight pipe section.

[0029] In order to further solve the second technical problem, a support member is further provided, which is arranged in the shell side cylinder and below the heat exchange core, and is used for supporting the heat exchange core.

[0030] Preferably, the support member comprises:

[0031] The support ring is horizontally arranged and is provided with support grooves with notches upwardly arranged at intervals in the circumferential direction.

[0032] The support legs are arranged at intervals in the circumferential direction below the support ring and are connected with the support ring, and each of the support legs is placed on the bottom wall of the shell-passing cylinder body and is constrained with the shell-passing cylinder body.

[0033] The lower tube box is inserted into the space surrounded by the inner circumferential wall of the support ring.

[0034] The circumferential surface of the lower tube plate is provided with protrusions at intervals in the circumferential direction, and each of the protrusions is inserted into a corresponding support groove.

[0035] In this way, the support member can support the heat exchange core upwardly and limit the heat exchange core in the circumferential direction, so that the heat exchange core is prevented from rotating in the circumferential direction. The cooperation of the protrusions and the support grooves facilitates assembly, and the heat exchange core can be moved upwardly or downwardly to realize disengagement or insertion of the protrusions and the support grooves.

[0036] Preferably, each of the support legs is connected with the support ring through an elastic member that can stretch upwardly and downwardly. The elastic member can effectively absorb thermal expansion of the heat exchange core during operation, so that the heat exchange core is prevented from being damaged.

[0037] Preferably, the elastic member is a bellows expansion joint. In the utility model, the elastic member can also be a spring.

[0038] To facilitate disassembly and assembly of the heat exchange core, preferably, the upper tube plate is provided with lifting lugs.

[0039] Compared with the prior art, the utility model has the advantages that: by designing the heat exchange core to have the structure of the upper tube plate, the pipeline, the lower tube plate, the lower tube box, the heat exchange pipe and the upper tube box, the shell-passing medium flows downwardly in the pipeline after entering the pipeline through the upper port, then enters the heat exchange pipe and spirally flows upwardly in the heat exchange pipe, and exchanges heat with the shell-passing medium flowing downwardly in the shell-passing cylinder body. During the heat exchange process, the flow directions of the shell-passing medium and the shell-passing medium are opposite, so that pure counterflow heat exchange is realized, and the heat exchange efficiency is greatly improved. After the heat exchange is completed, the heat exchange core can be lifted upwardly and separated from the shell-passing cylinder body, so that the heat exchange core is convenient to disassemble, clean and quickly replace, and the downtime is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is a structural schematic view of an embodiment of the utility model;

[0041] Figure 2 It is a partial structural schematic view of an embodiment of the utility model;

[0042] Figure 3 It is a front view of a support member in an embodiment of the utility model;

[0043] Figure 4 is a top view of the support member in the embodiment of the utility model;

[0044] Figure 5 is Figure 4 a partial structure schematic view of the A direction in the embodiment of the utility model;

[0045] Figure 6 is a sectional view of the lower tube plate in the embodiment of the utility model;

[0046] Figure 7 is a top view of the lower tube plate in the embodiment of the utility model. DETAILED DESCRIPTION

[0047] The utility model will be further described in detail below in combination with the embodiment of the drawings.

[0048] As Figures 1-7 shown, it is a preferred embodiment of the utility model of the core type winding pipe heat exchanger, and the heat exchanger includes shell side cylinder 1, heat exchange core 2 and support member 4.

[0049] Shell side cylinder 1 is vertically arranged, and the upper end is open, and the upper portion of the side wall of shell side cylinder 1 is provided with shell side inlet 1a, and the bottom wall is provided with shell side outlet 1b.The outer circumferential wall of the upper end of shell side cylinder 1 is provided with flange 11.

[0050] Heat exchange core 2 is inserted in shell side cylinder 1 through the opening, and can move upward and separate from shell side cylinder 1 under the action of external force.

[0051] Specifically, heat exchange core 2 includes upper tube plate 21, pipe 22, lower tube plate 23, lower tube box 24, heat exchange pipe 25 and upper tube box 26.

[0052] As Figure 1 , 2 shown, upper tube plate 21 covers the opening of shell side cylinder 1 to close the opening, and upper tube plate 21 is detachably connected with flange 11 by fastener 12 (bolt), and annular gasket 3 is arranged between upper tube plate 21 and flange 11, and the gasket 3 is sealed with the upper end surface of flange 11 and the lower surface of upper tube plate 21.At the same time, upper tube plate 21 is provided with lifting lug 211.

[0053] The pipe 22 is hollow inside and vertically arranged in the shell side cylinder 1. The upper end of the pipe 22 is supported on the upper tube plate 21 as the tube side inlet, and the lower end is a free end. In the embodiment, the pipe 22 has a first straight pipe section 221 extending downward from the upper end, a second straight pipe section 222 extending upward from the lower end, and a connecting section 223 connecting the first and second straight pipe sections. The second straight pipe section 222 is centrally located inside the shell side cylinder 1. The first straight pipe section 221 has two sections, which are equidistantly arranged on the periphery of the upper tube plate 21 in the circumferential direction, so that the first straight pipe section 221 is arranged in a staggered manner with the second straight pipe section 222 in the vertical direction. The lower end of each first straight pipe section 221 is connected to the upper end of the same second straight pipe section 222 through a corresponding connecting section 223. The two connecting sections 223 are in the shape of elbows bending from top to bottom towards the central part of the shell side cylinder 1, and are symmetrically arranged with the central axis of the second straight pipe section 222 as the central axis. The height of the two connecting sections 223 is substantially the same as the height of the shell side inlet 1a. At the same time, the extension length of the first straight pipe section 221 is less than the extension length of the second straight pipe section 222.

[0054] The lower tube plate 23 is horizontally arranged below the pipe 22 in the shell side cylinder 1, and is connected to the lower end of the pipe 22.

[0055] The lower tube box 24 is arranged below the lower tube plate 23, and the internal space of the lower tube box 24 is connected to the lower end of the pipe 22 through the through hole in the lower tube plate 23.

[0056] The heat exchange pipe 25 is spirally wound around the outer periphery of the second straight pipe section 222 of the pipe 22, and the upper end of the heat exchange pipe 25 is supported on the upper tube plate 21, and the lower end of the heat exchange pipe 25 is supported on the lower tube plate 23 and connected to the lower tube box 24.

[0057] The upper tube box 26 is arranged on the central part of the upper tube plate 21 away from the upper end of the pipe 22, and is connected to the upper end of the heat exchange pipe 25, and the upper tube box 26 is provided with a tube side outlet 26b.

[0058] The support 4 is arranged below the heat exchange core 2 in the shell side cylinder 1, and is used to support the heat exchange core 2. Specifically, as shown in Figure 1 , Figures 3-7 The support 4 includes a support ring 41 and a support leg 42. The support ring 41 is horizontally arranged and has four support grooves 410 with openings facing upward equidistantly arranged in the circumferential direction. The support leg 42 has at least three support legs, which are equidistantly arranged below the support ring 41 in the circumferential direction and connected to the support ring 41. Each support leg 42 is placed on the bottom wall of the shell side cylinder 1 and connected to the shell side cylinder 1. At the same time, each support leg 42 is connected to the support ring 41 through an elastic member 43 which can be stretched and contracted upward and downward, and the elastic member 43 is a bellows expansion joint.

[0059] In the embodiment, the lower tube box 24 is inserted into the space surrounded by the inner circumferential wall of the support ring 41 and is located directly above the shell side outlet 1b. The four protrusions 231 are circumferentially spaced on the circumferential surface of the lower tube plate 23, and each protrusion 231 is inserted into a corresponding support groove 410.

[0060] In this way, the heat exchange core 2 can be lifted out of the shell side cylinder 1 by the crane acting on the lifting lug 211 and lifting the heat exchange core 2 upward, and then the heat exchange core 2 can be inspected, repaired and cleaned. When the heat exchange core 2 is supported on the support member 4, the support member 4 can support the heat exchange core 2 upward and limit the heat exchange core 2 circumferentially, so as to avoid the heat exchange core 2 from being displaced circumferentially during use, and avoid the deflection of the heat exchange core during horizontal transportation, thereby protecting the heat exchanger during transportation.

[0061] In the description and claims of the present application, terms used for indicating directions, such as "front", "back", "up", "down", "left", "right", "side", "top", "bottom", etc. are used to describe various example structural parts and elements of the present application, but these terms are used only for the purpose of convenient description and are determined based on the example orientation shown in the drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitation, for example, "up" and "down" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

Claims

1. A draw-out type spiral wound heat exchanger, comprising: a shell side cylinder (1) vertically arranged with an open upper end, the shell side cylinder (1) being provided with a shell side inlet (1a) at the upper portion and a shell side outlet (1b) at the lower portion; a heat exchange core (2) inserted into the shell side cylinder (1) through the open upper end; the heat exchange core (2) comprising: an upper tube plate (21) covering the open upper end of the shell side cylinder (1) to close the open upper end and detachably connected to the shell side cylinder (1); a hollow tube (22) vertically arranged in the shell side cylinder (1) with its upper end supported on the upper tube plate (21) as a tube side inlet and its lower end as a free end; a lower tube plate (23) horizontally arranged below the tube (22) in the shell side cylinder (1) and constrained to the lower end of the tube (22); a lower tube box (24) arranged below the lower tube plate (23) and its internal space communicated with the lower end of the tube (22) through a through hole in the lower tube plate (23); a heat exchange tube (25) spirally wound around the outer periphery of the tube (22) with its upper end supported on the upper tube plate (21) and its lower end supported on the lower tube plate (23) and communicated with the lower tube box (24); and an upper tube box (26) arranged on the upper tube plate (21) avoiding the upper end of the tube (22) and communicated with the upper end of the heat exchange tube (25) and provided with a tube side outlet (26b). The outer peripheral wall of the upper end of the shell side cylinder (1) is provided with a flange (11) and the upper tube plate (21) is detachably connected to the flange (11) through a fastener (12); and a gasket (3) is arranged between the upper end surface of the flange (11) and the lower surface of the upper tube plate (21) and sealedly cooperated with the upper end surface of the flange (11) and the lower surface of the upper tube plate (21). The tube (22) has a first straight tube section (221) extending downward from the upper tube plate (21), a second straight tube section (222) extending upward from the lower tube plate (23) and a linking section (223) linking the first and second straight tube sections, the first straight tube section (221) has a length smaller than that of the second straight tube section (222) and the first and second straight tube sections are arranged in a staggered manner in the up-down direction; and the heat exchange tube (25) is spirally wound around the outer periphery of the second straight tube section (222). The first straight tube section (221) has at least two sections arranged in a spaced manner on the lower side of the upper tube plate (21) and the lower end of each first straight tube section (221) is connected to the upper end of the same second straight tube section (222) through the corresponding linking section (223). The upper tube box (26) is arranged at the central position of the upper tube plate (21) corresponding to the upper end of the second straight tube section (222) and each first straight tube section (221) is arranged at a peripheral position of the upper tube plate (21) in a spaced manner in the circumferential direction and each linking section (223) is in the form of an elbow pipe. ​ ​ characterized in that ​ ​ ​ ​ ​ ​ ​ 2. The drawndown wound pipe heat exchanger of claim 1, wherein: ​ ​ 3. The drawndown wound pipe heat exchanger of claim 1 wherein: ​ ​ 4. The drawndown wound pipe heat exchanger of claim 3, wherein: ​ 5. The drawndown wound pipe heat exchanger of claim 4, wherein: ​ 6. The drawndown wound pipe heat exchanger of claim 3 wherein: The shell side outlet (1b) is arranged at the bottom of the shell side cylinder (1) below the lower tube box (24); and the shell side inlet (1a) is arranged at the upper portion of the sidewall of the shell side cylinder (1) above the second straight tube section (222).

7. The drawndown wound pipe heat exchanger according to any one of claims 1 to 6, characterized in that: The support member (4) is arranged in the shell side cylinder (1) below the heat exchange core (2) and is used for supporting the heat exchange core (2).

8. The drawndown wound pipe heat exchanger of claim 7, wherein: The support member (4) comprises: The horizontally arranged support ring (41) is provided with upwardly opening support grooves (410) at intervals in the circumferential direction; At least three support feet (42) are arranged below the support ring (41) at intervals in the circumferential direction and are connected with the support ring (41), and each support foot (42) is arranged on the bottom wall of the shell side cylinder (1) and is constrained with the shell side cylinder (1); The lower tube box (24) is inserted into the space surrounded by the inner circumferential wall of the support ring (41); The circumferential surface of the lower tube plate (23) is provided with protrusions (231) at intervals in the circumferential direction, and each protrusion (231) is inserted into a corresponding support groove (410).

9. The drawndown wound pipe heat exchanger of claim 8, wherein: Each support foot (42) is connected with the support ring (41) through a telescopic member (43) which can be telescopically extended and retracted.

10. The drawndown wound pipe heat exchanger according to any one of claims 1 to 6, wherein: The upper tube plate (21) is provided with a lifting lug (211).

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