Single-sided tube plate structure detachable jacketed straight tube bundle heat exchanger

Abstract

The utility model relates to a kind of single-sided tube plate structure detachable sleeve type straight tube bundle tube type heat exchanger. Including first tube side header, second tube side header, shell side box and tube bundle, the first tube plate of first tube side header and second tube side header is connected by flange, second tube side header and shell side box are connected by flange, tube bundle is arranged inside second tube side header and shell side box, tube bundle includes inner heat exchange tube, outer sleeve and second tube plate, inner heat exchange tube is arranged in outer sleeve inside, the second tube plate is clamped between second tube side header and shell side box, outer sleeve lower end is welded with second tube plate connection, inner heat exchange tube lower end is welded with first tube plate connection.The utility model welding first tube plate and inner heat exchange tube, second tube plate and outer sleeve welding structure form a closed tube side, two welded assemblies can be dismantled at will, installation, maintenance is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of tubular heat exchanger technology, specifically a single-sided tube sheet structure detachable sleeve-type straight tube bundle heat exchanger. Background Technology

[0002] Currently, tubular heat exchangers are widely used in evaporation, crystallization, and concentration processes in the chemical, pharmaceutical, and papermaking industries. Some existing industries also utilize electric heating for cold-side medium evaporation.

[0003] Existing tubular heat exchangers mainly include fixed tubesheet, floating tubesheet, U-tube, and stuffing box types. These types of heat exchangers have the following drawbacks: 1. Fixed tubesheet heat exchangers have non-removable tube bundles, although individual tubes can be replaced; however, their structure with tubesheets at both ends results in lower cost. 2. Floating tubesheet and stuffing box heat exchangers have removable tube bundles and replaceable individual tubes, but their structure with tubesheets at both ends leads to higher cost. 3. U-tube heat exchangers have removable tube bundles, but their U-shaped tube structure means individual tubes cannot be replaced; while their cost is relatively low. Furthermore, current industrial methods using electric heating cannot fully utilize waste heat from factories, resulting in energy waste. Therefore, a tubular heat exchanger that can overcome the shortcomings of these various heat exchanger structures is needed. Utility Model Content

[0004] The purpose of this invention is to provide a single-sided tube sheet structure detachable sleeve-type straight tube bundle heat exchanger, mainly used for equipment in the case of hot-side medium condensation and cold-side medium evaporation. The heat exchanger tube bundle is detachable, which can realize the cleaning of the entire tube bundle; at the same time, individual heat exchange tubes can be replaced due to blockage or damage during operation; and tube bundle damage caused by temperature difference stress during application is avoided.

[0005] The technical solution of this utility model:

[0006] A single-sided tube sheet structure detachable sleeve-type straight tube bundle heat exchanger includes a first tube-side header, a second tube-side header, a shell-side housing, and a tube bundle. The first tube sheet of the first tube-side header and the second tube-side header are connected by a flange, and the second tube-side header is connected to the shell-side housing by a flange. The tube bundle is disposed inside the second tube-side header and the shell-side housing, and the tube bundle includes an inner heat exchange tube, an outer tube, and a second tube sheet. The inner heat exchange tube is disposed inside the outer tube. The second tube sheet is sandwiched between the second tube-side header and the shell-side housing. The lower end of the outer tube is welded to the second tube sheet, and the lower end of the inner heat exchange tube is welded to the first tube sheet.

[0007] The beneficial effects of this utility model are:

[0008] 1. This utility model combines the structure of traditional tubular heat exchangers and improves the tube sheet and tube bundle to form a unique structural form, replacing the electric heating method, thereby realizing the reuse of waste heat in the factory and further improving environmental protection and energy conservation.

[0009] 2. This utility model adopts a structure in which the first tube sheet is welded to the inner heat exchange tube and the second tube sheet is welded to the outer tube to form a closed tube side. The two welded assemblies can be disassembled, installed and maintained at will, making it more convenient.

[0010] 3. The shell-side box of this utility model adopts a flange connection and is welded to the second pipe side end of the second pipe side header to form a detachable structure, which facilitates the cleaning of the entire tube bundle component.

[0011] 4. Due to the two-pipe-side header structure, this utility model avoids the coexistence of vapor and liquid phases in the same housing, thus avoiding vibration and noise during operation.

[0012] 5. Because the tube bundle of this utility model adopts the form of an inner heat exchange tube and an outer tube, the contact with corrosive media on the shell side is reduced, which reduces the replacement cost of parts in the later operation of the equipment. Because of the use of the tube, the inner heat exchange tube and the outer tube are free to expand and contract with temperature, thus avoiding damage caused by thermal stress. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a front view of the single-sided tube sheet structure detachable sleeve-type straight tube bundle heat exchanger of this application;

[0015] Figure 2 This is a partial enlarged view of the connection between the heat exchange tubes and the first tube sheet in this application;

[0016] Figure 3 This is a partial enlarged view of the connection between the outer tube and the second tube sheet in this application.

[0017] Figure label:

[0018] First tube-side header 1; Second tube-side header 2; Shell-side housing 3; Tube bundle 4; Drain pipe 5; Tube-side hot medium inlet pipe 6; First tube-side end flange 7; First housing 8; First tube sheet 9; Second housing 10; Second tube-side end flange 11; Tube-side hot medium outlet pipe 12; Shell-side end flange 13; Shell-side cold medium inlet pipe 14; Shell-side cold medium outlet pipe 15; Shell 16; Second tube sheet 17; Support plate 18; Inner heat exchange tube 19; Outer tube 20. Detailed Implementation

[0019] To address the problems described in the background section, this application makes partial improvements to the structure of traditional tubular heat exchangers, forming a single-sided tube sheet structure with detachable sleeve-type straight tube bundle heat exchanger. This tubular heat exchanger not only replaces electrically heated heat exchangers but also structurally overcomes the shortcomings of existing fixed tube sheet heat exchangers, U-tube heat exchangers, floating tube sheet heat exchangers, and stuffing box heat exchangers. This allows for the entire tube bundle to be disassembled and cleaned, and individual heat exchangers to be replaced, while avoiding damage from temperature differences, operational vibrations, and noise during actual operation.

[0020] It should be noted that in the description of this application, terms such as "inner", "outer", "upper", and "lower" that indicate direction or positional relationship are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] This application discloses a single-sided tube sheet structure detachable sleeve-type straight tube bundle heat exchanger. This equipment can reuse the waste heat of the plant, reduce heat source waste, and play a vital role in energy conservation and environmental protection. From a structural point of view, it also reduces the investment cost of the equipment.

[0023] The assembly includes a first tube-side header 1, a second tube-side header 2, a shell-side housing 3, and a tube bundle 4. The first tube-side header 1 and the first tube sheet 9 of the second tube-side header 2 are connected by flanges. The second tube-side header 2 and the shell-side housing 3 are connected by flanges. The tube bundle 4 is disposed inside the second tube-side header 2 and the shell-side housing 3. The tube bundle 4 includes an inner heat exchange tube 19, an outer tube 20, and a second tube sheet 17. The inner heat exchange tube 19 is disposed inside the outer tube 20. The second tube sheet 17 is sandwiched between the second tube-side header 2 and the shell-side housing 3. The lower end of the inner heat exchange tube 19 is fixedly connected to the first tube sheet 9, and the lower end of the outer tube 20 is fixedly connected to the second tube sheet 17. The two tube-side headers are located at one end of the overall tube bundle, forming two independent cavities. The first tube-side housing 1 communicates with the inner heat exchange tube, and the second tube-side housing 2 communicates with the outer tube. The inner heat exchange tube and the outer tube form the entire tube bundle, and the inner heat exchange tube and the outer tube can be freely disassembled. The inner heat exchange tube and the outer tube extend downward from the top inside the shell. The outer tube is shorter than the inner heat exchange tube. The lower end of the outer tube extends to the second tube sheet and is welded to the second tube sheet. The inner heat exchange tube continues downward to the first tube sheet and is welded to the first tube sheet.

[0024] The first pipe-side header 1 includes a first housing 8, a first pipe-side end flange 7, a pipe-side heat medium inlet pipe 6, and a drain pipe 5. The first pipe-side end flange 7 is provided at the upper end of the first housing 8, the pipe-side heat medium inlet pipe 6 is provided on the side, and the drain pipe 5 is provided at the lower end. The first pipe-side end flange 7 is connected to the first tube sheet 9.

[0025] The second pipe-side header 2 includes a second housing 10, a second pipe-side end flange 11, and a pipe-side heat medium outlet pipe 12. The second pipe-side end flange 11 is provided at the upper end of the second housing 10, the pipe-side heat medium outlet pipe 12 is provided on the side, and the first tube sheet 9 is provided at the lower end.

[0026] The shell-side housing 3 includes a shell 16, a shell-side end flange 13, a support plate 18, a shell-side cold medium inlet pipe 14, and a shell-side cold medium outlet pipe 15. The shell 16 has a shell-side end flange 13 at its lower end, a shell-side cold medium inlet pipe 14 on its side, and a shell-side cold medium outlet pipe 15 at its upper end. The support plate 18 is fixedly connected inside the shell 16. The support plate has multiple round holes, and multiple sleeves pass through the round holes of the support plate. The shell-side end flange 13 is connected to the second pipe-side end flange 11.

[0027] This application describes a single-sided tube sheet structure with a detachable sleeve-type straight tube bundle heat exchanger, primarily used in applications where the hot-side medium condenses and the cold-side medium evaporates. The equipment features a detachable tube bundle, enabling overall tube bundle cleaning; individual heat exchange tubes can be replaced due to severe blockage or damage during operation; and tube bundle damage caused by temperature stress during application is avoided.

[0028] like Figure 1-3As shown, a specific embodiment of a single-sided tube sheet structure removable sleeve-type straight tube bundle heat exchanger is as follows:

[0029] like Figure 1 As shown, the single-sided tube sheet structure detachable sleeve-type straight tube bundle heat exchanger includes a first tube-side header 1, a second tube-side header 2, a shell-side housing 3, and a tube bundle 4. The first tube-side header 1 includes a tube-side hot medium inlet pipe component 6, a first tube-side end flange 7, a first housing 8, and a drain pipe 5; the second tube-side header includes a first tube sheet 9, a second housing 10, a second tube-side end flange 11, and a tube-side hot medium outlet pipe component 12; the shell-side housing 3 includes a shell-side end flange 13, a shell-side cold medium inlet pipe component 14, a shell-side cold medium outlet pipe component 15, a shell 16, and a support plate 18.

[0030] like Figure 1 As shown, the hot medium enters through the hot medium inlet pipe 6, flows from bottom to top through the inner heat exchange tube 19, and enters the cavity formed by the outer tube 20 and the inner heat exchange tube 19 at the top of the inner heat exchange tube 19, flowing from top to bottom within the cavity. The cold medium enters through the shell-side cold medium inlet pipe 14, flows from bottom to top outside the outer tube 20, and flows out through the shell-side cold medium outlet pipe 15 after being heated. Thus, the hot and cold media transfer heat between the inner and outer sides of the outer tube 20, thereby achieving heat exchange. Due to the heat transfer, the hot medium condenses within the cavity formed by the outer tube 20 and the inner heat exchange tube 19. The condensate flows out of the cavity, enters the pipe-side header 2, and flows out through the pipe-side hot medium outlet pipe component 12, entering the process section. Since the hot medium enters in a gaseous state and becomes liquid after heat exchange, and since the two pipe-side boxes are independent of each other, the gas and liquid states are separated, avoiding vibration and noise during operation.

[0031] like Figure 1 As shown, the first pipe-side header 1, the second pipe-side header 2, and the shell-side housing 3 are connected by flanges, which means that each component can be disassembled.

[0032] like Figure 2 As shown, the internal heat exchange tube 19 is welded to the first tube sheet 9.

[0033] like Figure 3 As shown, the outer tube 20 is welded to the second tube sheet 17.

[0034] Based on the above three points, the internal heat exchanger tube bundle is welded to the second tube-side header 2 as a whole, allowing for complete disassembly and cleaning of the entire internal heat exchanger tube bundle. Similarly, the outer tube bundle is welded to the second tube sheet 17. When the shell-side housing is disassembled, the outer tube bundle is separated from the shell-side housing, thus also enabling cleaning of the entire outer tube bundle. Furthermore, if the shell-side medium is corrosive, it is possible to replace only the outer tube bundle, rather than replacing all internal and outer heat exchanger tubes, significantly reducing investment costs and operational maintenance.

[0035] Since the inner heat exchange tube 19 and the outer tube 20 are not connected to each other, they can be disassembled freely, which greatly improves the technical space for convenient maintenance on the process line.

[0036] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art, inspired by this description, design similar structures and implementations to the above embodiments without departing from the technical essence of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A single sided tubesheet construction removable double pipe straight tube bundle heat exchanger, characterized in that: It includes a first tube-side header, a second tube-side header, a shell-side housing, and a tube bundle. The first tube-side header and the first tube sheet of the second tube-side header are connected by a flange. The second tube-side header and the shell-side housing are connected by a flange. The tube bundle is disposed inside the second tube-side header and the shell-side housing. The tube bundle includes an inner heat exchange tube, an outer tube, and a second tube sheet. The inner heat exchange tube is disposed inside the outer tube. The second tube sheet is sandwiched between the second tube-side header and the shell-side housing. The lower end of the outer tube is welded to the second tube sheet, and the lower end of the inner heat exchange tube is welded to the first tube sheet.

2. A single sided tubesheet detachable double pipe straight tube bundle heat exchanger according to claim 1, characterized in that: The first pipe-side header includes a first housing, a first pipe-side end flange, a pipe-side heat medium inlet pipe and a drain pipe. The first pipe-side end flange is provided at the upper end of the first housing, the pipe-side heat medium inlet pipe is provided on the side, and the drain pipe is provided at the lower end. The first pipe-side end flange is connected to the first tube sheet.

3. A single sided tubesheet detachable double pipe straight tube bundle heat exchanger according to claim 1, characterized in that: The second pipe-side header includes a second housing, a second pipe-side end flange, and a pipe-side hot medium outlet pipe. The second pipe-side end flange is provided at the upper end of the second housing, the pipe-side hot medium outlet pipe is provided on the side, and the first tube sheet is provided at the lower end.

4. A single sided tubesheet detachable double pipe straight tube bundle heat exchanger according to claim 1, characterized in that: The shell-side enclosure includes a shell, a shell-side flange, a support plate, a shell-side cold medium inlet pipe, and a shell-side cold medium outlet pipe. The shell has a shell-side flange at the lower end, a shell-side cold medium inlet pipe on the side, and a shell-side cold medium outlet pipe at the upper end. A support plate is provided inside the shell, and an outer sleeve passes through a hole in the support plate. The shell-side flange is connected to the second pipe-side flange.

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