Full-heat-preservation double-tube-plate heat exchanger
By installing a support ring and an insulation shell on the outside of the double-tube plate heat exchanger, using gap air to form an annular insulation area, and installing an electric heating wire and an electric heating rod in the gap, the insulation layer material cannot be completely insulated in the prior art. The problem of heat exchange efficiency and start-up speed are improved.
Patent Information
- Application Number
- CN202420020443.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-03
AI Technical Summary
The insulation layer materials of existing heat exchangers cannot achieve complete insulation, resulting in heat loss and affecting heat exchange efficiency.
The design of fully insulated double-tube heat exchanger is adopted. By installing a support ring and insulation shell on the outside of the double-tube heat exchanger, and installing an electric heating wire and an electric heating rod in the gap, forming an annular insulation area to avoid direct contact. Reduce heat transfer and use gap air to assist in heating and control the heat exchange process.
It effectively reduces heat loss, improves the efficiency of the heat exchanger, and assists in cold start and normal use, shortens the start time and optimizes the heat exchange process.
Smart Images
Figure CN222211339U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of heat exchangers, and in particular to a fully insulated double-tube sheet heat exchanger. Background Art
[0002] Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters to heat raw materials non-contactly and ensure the normal circulation of steam (or hot water). Double-tube sheet heat exchanger is a typical heat exchanger. Its technology has long been mature and reliable. It is also the most widely used heat exchanger in various industries.
[0003] The heat exchange rate of a heat exchanger is an important parameter for measuring the quality of the heat exchanger. People hope to transfer as much heat as possible between the two fluids to reduce heat loss (reduce the natural dissipation of heat into the outside air). Therefore, it is necessary to design a necessary insulation layer in the shell of the heat exchanger. However, the insulation layer currently used cannot achieve complete insulation. The shell of the heat exchanger directly contacts the insulation layer, which will cause more heat to be directly transferred to the insulation layer, resulting in excessive heat loss. For this reason, the utility model provides a new type of fully insulated double-tube sheet heat exchanger. Summary of the invention
[0004] The purpose of the present application is to provide a fully insulated double-tube sheet heat exchanger, which overcomes the deficiency that the existing insulation layer materials cannot achieve complete insulation, enables the double-tube sheet heat exchanger to achieve full insulation as much as possible, improves the efficiency of the heat exchanger, and can timely regulate the heat exchange process.
[0005] In order to achieve the above objectives, the technical solution adopted in this application is:
[0006] A fully insulated double tube sheet heat exchanger comprises a double tube sheet heat exchanger body, a first support ring and a second support ring are fixedly installed on the outer side of the double tube sheet heat exchanger body, an insulation shell is fixedly installed on the outer side of the first support ring and the second support ring, one end of the insulation shell is a closed end and the other end is an open end, an insulation cover is fixedly installed on the open end of the insulation shell, and the double tube sheet heat exchanger body is completely covered by the insulation shell and the insulation cover;
[0007] The closed end of the heat-insulating shell and the end of the double-tube-sheet heat exchanger body form a first gap, and an electric heating wire is fixedly installed at the end of the double-tube-sheet heat exchanger body and inside the first gap;
[0008] A second gap is formed between the inner side of the heat-insulating shell and the outer side of the double-tube-sheet heat exchanger body, and an electric heating rod is fixedly installed between the first support ring and the second support ring and inside the second gap.
[0009] As a preferred embodiment, the double-tube sheet heat exchanger body includes a cylinder, a front head and a rear head are fixedly installed at both ends of the cylinder, a first fluid inlet is fixedly installed on the side of the front head, a first area recessed toward the cylinder is provided at the end of the front head, a second fluid inlet is fixedly installed at the center of the first area, the first area is divided into an outer ring cavity and an inner ring cavity by the second fluid inlet, a front shell is fixedly installed at the port of the outer ring cavity, a second fluid outlet is fixedly installed on the side of the front shell, the first fluid outlet is fixedly installed on the side of the rear head, a second area recessed toward the cylinder is provided at the end of the rear head, the second area is a circular cavity, a sealing plate is fixedly installed at the port of the circular cavity, the electric heating wire is fixedly installed on the side of the sealing plate, a tube group is fixedly installed between the front head and the rear head and inside the cylinder, and the tube group includes at least: a thin tube connecting the inner ring cavity and the circular cavity, and a thin tube connecting the outer ring cavity and the circular cavity.
[0010] As another preferred embodiment, a first C-shaped frame and a second C-shaped frame are fixedly installed on the inner side of the cylinder, the first C-shaped frame and the second C-shaped frame are both fixedly connected to the pipe group, and the notch of the first C-shaped frame and the notch of the second C-shaped frame are in opposite directions.
[0011] Further preferably, support feet are fixedly installed on the bottom of the heat-insulating shell.
[0012] As a preference, a long insulation sleeve is provided on the outer side of the insulation cover located at the second fluid inlet.
[0013] As another preferred embodiment, the portion of the insulation cover located outside the front shell is provided with an annular insulation thickened sleeve.
[0014] Further preferably, a temperature sensor is installed at the first fluid outlet.
[0015] Compared with the prior art, the beneficial effects of this application are:
[0016] (1) The utility model adopts a first support ring and a second support ring to install the insulation shell, one end of the insulation shell is a closed end and the other end is an open end, and an insulation cover is fixedly installed on the open end of the insulation shell, so that the insulation shell and the insulation cover completely cover the double-tube sheet heat exchanger body, and a gap is formed between the double-tube sheet heat exchanger body and the side and end of the insulation shell, and an electric heating wire and an electric heating rod are installed in the gap. When in use, since the outer shell of the double-tube sheet heat exchanger body and the insulation shell are not in direct contact, the air in the gap between them can reduce the efficiency of heat transfer, and form an annular insulation area at the gap, so that the outer shell of the double-tube sheet heat exchanger body can be well protected. In addition, when the equipment is cold started, since part of the heat in the tube group needs to be used to heat the heat exchanger body, the startup waiting time is relatively long. Using the electric heating wire and the electric heating rod for auxiliary heating can speed up the startup of the equipment. In the normal use stage, when the heat exchange amount is insufficient, the electric heating wire and the electric heating rod can also be used for auxiliary heating to achieve the purpose of regulating the heat exchange process;
[0017] (2) The utility model improves the structure of the front head and the rear head end portions, thereby making the structure of the double-tube sheet heat exchanger body more compact and further improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a front view of the fully insulated double tube sheet heat exchanger;
[0019] Figure 2 A top view of the fully insulated double tube sheet heat exchanger;
[0020] Figure 3 for Figure 2 Section view of the section line at AA;
[0021] Figure 4 This is a schematic diagram of the inner shell of the fully insulated double tube sheet heat exchanger;
[0022] Figure 5 is an internal schematic diagram of the fully insulated double tube sheet heat exchanger;
[0023] Figure 6 Schematic diagram of the thin tube distribution of the fully insulated double-tube sheet heat exchanger.
[0024] In the figure: 1. insulation cover; 2. insulation shell; 3. support feet; 4. first support ring; 5. second support ring; 6. electric heating wire; 7. electric heating rod; 8. front head; 9. cylinder; 10. rear head; 11. first fluid inlet; 12. first fluid outlet; 13. circular cavity; 14. outer ring cavity; 15. hot water inlet; 16. front shell; 17. second fluid outlet; 18. pipe group; 19. first C-type frame; 20. second C-type frame. DETAILED DESCRIPTION
[0025] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0026] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.
[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0028] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.
[0029] like Figure 1-Figure 6 The fully insulated double-tube sheet heat exchanger shown includes a double-tube sheet heat exchanger body, a first support ring 4 and a second support ring 5 are fixedly installed on the outer side of the double-tube sheet heat exchanger body, an insulation shell 2 is fixedly installed on the outer side of the first support ring 4 and the second support ring 5, one end of the insulation shell 2 is a closed end and the other end is an open end, and an insulation cover 1 is fixedly installed on the open end of the insulation shell 2, and the double-tube sheet heat exchanger body is completely covered by the insulation shell 2 and the insulation cover 1, so as to insulate the outer shell of the double-tube sheet heat exchanger body.
[0030] The closed end of the heat-insulating shell 2 and the end of the double-tube-sheet heat exchanger body form a first gap, and an electric heating wire 6 is fixedly installed at the end of the double-tube-sheet heat exchanger body and inside the first gap. The inner side of the heat-insulating shell 2 and the outer side of the double-tube-sheet heat exchanger body form a second gap, and an electric heating rod 7 is fixedly installed between the first support ring 4 and the second support ring 5 and inside the second gap.
[0031] In this structure, the end and the inner side of the insulation shell 2 form a gap with the outer shell of the double-tube sheet heat exchanger body. During the use of the double-tube sheet heat exchanger, the heat on the outer shell of the double-tube sheet heat exchanger body directly heats the air in the gap space. The air in the gap space is limited. After it is completely heated, the heat accumulates, thereby insulating the outer shell of the double-tube sheet heat exchanger body (after the temperatures are basically the same, it can hinder the continued exchange of heat). Since the thermal conductivity of gases is much lower than that of solids, the heat exchange between the completely heated air and the insulation shell 2 is also relatively small. Compared with the traditional method of directly applying insulation materials on the double-tube sheet heat exchanger body, the insulation effect is better.
[0032] In some cases, the electric heating wire 62 and the electric heating rod 7 can assist in heating the outer shell of the double tube sheet heat exchanger body and the gap air between the double tube sheet heat exchanger body and the insulation shell 2, and assist in regulating the heat exchange process to achieve better use effect.
[0033] In one embodiment, the double tube sheet heat exchanger body includes a cylinder 9, and a front head 8 and a rear head 10 are fixedly installed at both ends of the cylinder 9, respectively. The front head 8, the rear head 10 and the cylinder 9 are flange mounted or welded. A first fluid inlet 11 is fixedly installed on the side of the front head 8, and a first area recessed toward the cylinder 9 is provided at the end of the front head 8. A second fluid inlet 15 is fixedly installed at the center of the first area. The first area is divided into an outer ring cavity 14 and an inner ring cavity by the second fluid inlet 15. A front shell 16 is fixedly installed at the port of the outer ring cavity 14. A second fluid outlet 17 is fixedly installed on the side of the shell 16, a first fluid outlet 12 is fixedly installed on the side of the rear head 10, and a second area recessed toward the cylinder 9 is provided at the end of the rear head 10. The second area is a circular cavity 13, and a sealing plate is fixedly installed at the port of the circular cavity 13. The electric heating wire 6 is fixedly installed on the side of the sealing plate. A tube group 18 is fixedly installed between the front head 8 and the rear head 10 and inside the cylinder 9. The tube group 18 includes at least: a thin tube connecting the inner annular cavity and the circular cavity 13, and a thin tube connecting the outer annular cavity 14 and the circular cavity 13.
[0034] During use, the high-temperature second fluid enters from the second fluid inlet 15, then passes through the thin tube connecting the inner annular cavity and the circular cavity 13, enters the circular cavity 13, then passes through the thin tube connecting the outer annular cavity 14 and the circular cavity 13, flows back to the interior of the front shell 16, and finally is discharged through the second fluid outlet 17; at the same time, the first fluid flows into the interior of the cylinder 1 from the first fluid inlet 11, contacts the tube group 18 inside the cylinder 1 for heat exchange, and is finally discharged from the first fluid outlet 12.
[0035] In one embodiment, a first C-shaped frame 19 and a second C-shaped frame 20 are fixedly installed on the inner side of the cylinder 9. The first C-shaped frame 19 and the second C-shaped frame 20 are both fixedly connected to the pipe group 18. The notch of the first C-shaped frame 19 and the notch of the second C-shaped frame 20 are in opposite directions.
[0036] One of the functions of the first C-shaped frame 19 and the second C-shaped frame 20 is to maintain the position of the tube group 18 , and the second purpose is to disturb the first fluid outlet 12 to improve the heat exchange efficiency.
[0037] In one embodiment, a support foot 3 is fixedly installed on the bottom of the heat-insulating shell 2 for supporting the heat-insulating shell 2 .
[0038] In one embodiment, the outer portion of the insulation cover 1 located at the second fluid inlet 15 is provided with a long insulation sleeve, and the outer portion of the insulation cover 1 located at the front shell 16 is provided with an annular insulation thickened sleeve to achieve the effect of insulation.
[0039] In one embodiment, a temperature sensor is installed at the first fluid outlet 12 for detecting the temperature of the liquid at the first fluid outlet 12 and for guiding and controlling the flow rate of the second fluid and whether the electric heating wire 62 and the electric heating rod 7 are started.
[0040] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.
Claims
1. A fully insulated double tube sheet heat exchanger, comprising a double tube sheet heat exchanger body, Features: A first support ring and a second support ring are fixedly installed on the outer side of the double tube sheet heat exchanger body, and a heat preservation shell is fixedly installed on the outer side of the first support ring and the second support ring. One end of the heat preservation shell is a closed end and the other end is an open end. A heat preservation cover is fixedly installed on the open end of the heat preservation shell, and the double tube sheet heat exchanger body is completely covered by the heat preservation shell and the heat preservation cover; The closed end of the heat-insulating shell and the end of the double-tube-sheet heat exchanger body form a first gap, and an electric heating wire is fixedly installed at the end of the double-tube-sheet heat exchanger body and inside the first gap; A second gap is formed between the inner side of the heat-insulating shell and the outer side of the double-tube-sheet heat exchanger body, and an electric heating rod is fixedly installed between the first support ring and the second support ring and inside the second gap.
2. The fully insulated double tube sheet heat exchanger according to claim 1, Features: The double-tube sheet heat exchanger body comprises a cylinder, a front head and a rear head are fixedly installed at both ends of the cylinder respectively, a first fluid inlet is fixedly installed on the side of the front head, a first area recessed toward the cylinder is provided at the end of the front head, a second fluid inlet is fixedly installed at the center of the first area, the first area is divided into an outer ring cavity and an inner ring cavity by the second fluid inlet, a front shell is fixedly installed at the port of the outer ring cavity, a second fluid outlet is fixedly installed on the side of the front shell, the first fluid outlet is fixedly installed on the side of the rear head, a second area recessed toward the cylinder is provided at the end of the rear head, the second area is a circular cavity, a sealing plate is fixedly installed at the port of the circular cavity, the electric heating wire is fixedly installed on the side of the sealing plate, a tube group is fixedly installed between the front head and the rear head and inside the cylinder, the tube group comprises at least: a thin tube connecting the inner ring cavity with the circular cavity, and a thin tube connecting the outer ring cavity with the circular cavity.
3. The fully insulated double tube sheet heat exchanger according to claim 2, Features: A first C-shaped frame and a second C-shaped frame are fixedly installed on the inner side of the cylinder. The first C-shaped frame and the second C-shaped frame are both fixedly connected to the pipe group. The notch of the first C-shaped frame faces opposite to the notch of the second C-shaped frame.
4. The fully insulated double tube sheet heat exchanger according to claim 1, Features: The bottom of the heat-insulating shell is fixedly provided with supporting feet.
5. The fully insulated double tube sheet heat exchanger according to claim 2, Features: The outer portion of the heat-insulating cover located at the second fluid inlet is provided with a heat-insulating long sleeve.
6. The fully insulated double tube sheet heat exchanger according to claim 2, Features: The portion of the heat-insulating cover located outside the front shell is provided with an annular heat-insulating thickened sleeve.
7. The fully insulated double tube sheet heat exchanger according to claim 2, Features: A temperature sensor is installed at the first fluid outlet.