Straight-through type double-tube-plate heat exchanger with double functions of steam and electric heating

Abstract

The utility model provides a straight-through type steam and electric heating dual-function double-tube-plate heat exchanger. The straight-through type steam and electric heating dual-function double-tube-plate heat exchanger comprises a tube pass heat exchange tube arranged between two end plate assemblies; each end plate assembly is provided with an injection water inlet or an injection water outlet; the injection water inlet or the injection water outlet is communicated to a cavity in the end plate assembly, and the cavity is communicated to all the tube pass heat exchange tubes, so that injection water of the injection water inlet flows to the injection water outlet through all the tube pass heat exchange tubes to be discharged; the shell is arranged between the two end plate assemblies; the shell covers all the tube pass heat exchange tubes, and a heating sleeve is arranged on the inner wall of the shell; a heat exchange fluid inlet and a heat exchange fluid outlet are formed in the two ends of the shell correspondingly. The multiple tube pass heat exchange tubes are arranged between the two end plate assemblies, a main channel for heat exchange is formed, injection water can fully exchange heat with heat exchange fluid circulating in the shell, and effective temperature adjustment is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pharmaceutical equipment, and more specifically, particularly relates to the technical field of a straight-through double-tube plate heat exchanger with dual functions of steam and electric heating. Background Art

[0002] In the production process of pharmaceutical companies, thermal disinfection and temperature maintenance of pharmaceutical water are important links to ensure the quality and safety of drugs. Especially in the production workshop, constant control of injection water temperature is essential to meet the GMP (Good Manufacturing Practice) requirements of drug production. However, some pharmaceutical companies are currently facing the dilemma of no long-term steam supply, especially in the southern pharmaceutical companies in the newly built industrial zones. This problem is particularly prominent.

[0003] In the traditional thermal disinfection and temperature maintenance solutions for pharmaceutical water, most pharmaceutical companies rely on boiler steam supply. However, during non-production periods, the production cost of boiler steam will increase significantly, requiring more manpower for management and safety monitoring. In addition, due to the decrease in steam consumption, it may even happen that the operating loss exceeds the demand of process equipment, which not only increases production costs, but may also have an adverse impact on the quality and temperature control of pharmaceutical water. Utility Model Content

[0004] The utility model aims to provide a straight-through double-tube plate heat exchanger with dual functions of steam and electric heating, so as to solve the problem that the existing heat exchanger stops working when there is no steam supply.

[0005] In order to solve the above technical problems, the utility model provides a double-tube sheet heat exchanger with direct steam and electric heating functions, which is characterized by comprising:

[0006] A plurality of tube-side heat exchange tubes, wherein the plurality of tube-side heat exchange tubes are arranged between two end plate assemblies;

[0007] Each of the end plate assemblies is provided with an injection water inlet or an injection water outlet; the injection water inlet or the injection water outlet is connected to a cavity in the end plate assembly, and the cavity is connected to all the tube-side heat exchange tubes, so that the injection water in the injection water inlet flows through all the tube-side heat exchange tubes to the injection water outlet for discharge;

[0008] The shell is arranged between the two end plate assemblies; the shell covers all the tube-side heat exchange tubes, the inner wall of the shell is provided with a heating jacket; and the two ends of the shell are respectively provided with a heat exchange fluid inlet and a heat exchange fluid outlet.

[0009] Optionally, each of the end plate assemblies comprises a cover plate and an external welding end plate; the external welding end plate is connected to the cover plate via a plurality of circumferentially arranged fasteners.

[0010] Optionally, the outer welding end plate is provided with a plurality of mounting holes arranged in a circumferential array, and one end of the tube-side heat exchange tube is welded in each of the mounting holes.

[0011] Optionally, the mounting hole of the outer welding end plate facing the side adjacent to the cover plate is circumferentially welded to the tube opening of the tube-side heat exchange tube.

[0012] Optionally, a circular groove is provided on a side of the cover plate facing the adjacent outer welding end plate.

[0013] Optionally, a ring-shaped groove is provided on the side wall of the circular groove, and a sealing ring is provided in the ring-shaped groove.

[0014] Optionally, the injection water inlet or the injection water outlet is provided with a pipe, and a conical flange is provided at the end of the pipe.

[0015] Optionally, the end surface of the conical flange is provided with a circle of arc-shaped grooves.

[0016] Optionally, the heat exchange fluid inlet and the heat exchange fluid outlet are respectively located on two sides of the shell.

[0017] Optionally, the heat exchange fluid inlet and the heat exchange fluid outlet are both provided with an inlet and outlet pipe with a flange structure.

[0018] The beneficial effect of a straight-through double-tube plate heat exchanger with dual functions of steam and electric heating provided by the present application is that: the utility model forms a main channel for heat exchange by setting multiple tube-side heat exchange tubes between two end plate assemblies, so that the injection water can fully exchange heat with the heat exchange fluid circulating inside the shell, thereby achieving effective temperature regulation. This design improves the heat exchange efficiency and meets the requirements for injection water temperature under different process conditions.

[0019] Secondly, by setting a heating jacket inside the shell, the heating jacket is heated by electric energy, thereby heating the tube-side heat exchange tube and injection water. This electric heating function solves the problem that the existing heat exchanger stops working when there is no steam supply, and improves the flexibility and reliability of the equipment.

[0020] In addition, the design of the end plate assembly also fully considers the sealing and stability. By setting a mounting hole on the external welding end plate and welding one end of the tube-side heat exchange tube into the mounting hole, a firm connection between the tube-side heat exchange tube and the external welding end plate is ensured. At the same time, a circular groove is set on the side of the cover plate facing the adjacent external welding end plate, and an annular groove and a sealing ring are set on the side wall of the groove, which further improves the sealing performance of the end plate assembly and prevents leakage of fluid or gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a straight-through double-tube plate heat exchanger with dual functions of steam and electric heating according to the utility model;

[0022] Figure 2 is a schematic diagram of the area of ​​A;

[0023] Figure 3 This is an enlarged view of B.

[0024] Description of the markings in the figure:

[0025] 1. Tube-side heat exchange tube; 2. End plate assembly; 21. Injection water inlet; 22. Injection water outlet; 23. Cover plate; 231. Circular groove; 232. Annular groove; 233. Sealing ring; 24. External welding end plate; 241. Mounting hole; 25. Fastener; 3. Shell; 31. Heat exchange fluid inlet; 32. Heat exchange fluid outlet; 33. Heating jacket; 4. Pipe; 41. Conical flange; 42. Arc groove. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing 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 therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] like Figure 1 As shown, the specific technical solution of a straight-through double-tube plate heat exchanger with dual functions of steam and electric heating provided in the embodiment of the present application is as follows:

[0031] A plurality of tube-side heat exchange tubes 1, wherein the plurality of tube-side heat exchange tubes 1 are arranged between two end plate assemblies 2;

[0032] Each end plate assembly 2 is provided with an injection water inlet 21 or an injection water outlet 22; the injection water inlet 21 or the injection water outlet 22 is connected to a cavity 23 in the end plate assembly 2, and the cavity 23 is connected to all the tube-side heat exchange tubes 1, so that the injection water of the injection water inlet 21 flows through all the tube-side heat exchange tubes 1 to be discharged from the injection water outlet 22;

[0033] The shell 3 is arranged between the two end plate assemblies 2; the shell 3 covers all the tube-side heat exchange tubes 1, and a heating jacket 33 is arranged on the inner wall of the shell 3; and a heat exchange fluid inlet 32 ​​and a heat exchange fluid outlet 33 are respectively arranged at both ends of the shell 3.

[0034] The utility model provides a straight-through double-tube plate heat exchanger with dual functions of steam and electric heating. Compared with the prior art, the utility model forms a main channel for heat exchange by setting a plurality of tube-side heat exchange tubes 1 between two end plate assemblies 2. Injection water enters from the injection water inlet 21, flows through all tube-side heat exchange tubes 1, and is finally discharged from the injection water outlet 22. This design ensures that the injection water can fully exchange heat with the heat exchange fluid circulating in the shell 3 during the circulation process, thereby achieving effective temperature regulation.

[0035] In addition, the utility model provides a heating jacket 33, which can heat the tube-side heat exchange tube 1 by electric energy, and further heat the injection water, thereby solving the problem that the existing heat exchanger stops working when there is no steam supply.

[0036] In another embodiment of the present application, Figure 1As shown, each end plate assembly 2 includes a cover plate 23 and an outer welded end plate 24; the outer welded end plate 24 is connected to the cover plate 23 by a plurality of circumferentially arranged fasteners 25. By using a plurality of circumferentially arranged fasteners 25 for connection, the connection stability and strength between the cover plate 23 and the outer welded end plate 24 can be ensured. This connection method can effectively resist external forces and vibrations and ensure the integrity of the entire end plate assembly. Since the fasteners are arranged circumferentially, when a part needs to be replaced or repaired, it can be easily disassembled and installed, reducing maintenance costs and time.

[0037] Preferably, fasteners such as screws, studs, locking nuts, and bolt locking agents are used in conjunction with them to ensure long-term stability of the fasteners.

[0038] In another embodiment of the present application, Figure 1 As shown, the outer welding end plate 24 is provided with a plurality of mounting holes 241 arranged in a circumferential array, and one end of the tube-side heat exchange tube 1 is welded in each mounting hole 241 .

[0039] In another embodiment of the present application, Figure 1 As shown, the mounting hole 241 of the outer welding end plate 24 facing the adjacent cover plate 23 is welded to the tube mouth of the tube-side heat exchange tube 1 in the circumferential direction; the welding method of the tube mouth and the mounting hole 241 in the circumferential direction ensures that the connection between the tube-side heat exchange tube 1 and the outer welding end plate 24 is both firm and stable. This connection method can withstand large pressure and temperature changes, thereby ensuring the stable operation of the entire heat exchanger. The welding connection provides a good sealing effect, which can effectively prevent the fluid from leaking inside the heat exchanger, thereby ensuring the safety performance of the heat exchanger.

[0040] In another embodiment of the present application, Figure 1 As shown, a circular groove 231 is provided on the side of the cover plate 23 facing the adjacent outer welding end plate 24. The circular groove 231 is arranged to correspond to the mounting hole 241 on the outer welding end plate 24, so that the tube-side heat exchange tube 1 can smoothly pass through the cover plate 23 and be welded to the outer welding end plate 24. This design enhances the adaptability between the cover plate 23 and the outer welding end plate 24, making the structure of the entire end plate assembly more compact and stable.

[0041] In another embodiment of the present application, Figure 1 As shown, the side wall of the circular groove 231 is provided with a ring groove 232, and a sealing ring 233 is provided in the ring groove 232. The provision of the sealing ring 233 significantly improves the sealing performance of the end plate assembly. When the cover plate 23 and the outer welding end plate 24 are tightly fitted, the sealing ring 233 can effectively fill the small gap between the two, prevent fluid or gas leakage, and ensure the normal operation of the heat exchanger.

[0042] In another embodiment of the present application, Figure 1 As shown, the injection water inlet 21 or the injection water outlet 22 is provided with a pipe 4, and a conical flange 41 is provided at the end of the pipe 4. The setting of the conical flange 41 plays a role in optimizing the flow of the fluid. The conical design can guide the fluid to transition more smoothly at the end of the pipe, reduce the formation of turbulence and eddy currents, thereby reducing energy loss and improving the stability of the fluid flow. This is of great significance for improving the efficiency and service life of the heat exchanger. The conical flange 41 may also have a sealing function. When connecting an external device or system, the flange can fit tightly with the corresponding interface to form an effective seal to prevent fluid leakage.

[0043] In another embodiment of the present application, Figure 1 As shown, the end surface of the conical flange 41 is provided with a circle of arc groove 42. The arc groove 42 can accommodate and fix sealing materials, such as O-rings or sealants, to form a tighter sealing layer. This can effectively prevent fluid leakage at the connection point and improve the safety and reliability of the entire system.

[0044] In another embodiment of the present application, Figure 1 As shown, the heat exchange fluid inlet 32 ​​and the heat exchange fluid outlet 33 are respectively located on both sides of the shell 3. First, such a layout helps to optimize the flow path of the fluid. When the heat exchange fluid enters the shell 3 from the inlet 32, it can pass through the internal tube side or shell side for heat exchange, and then flow out from the outlet 33. The heat exchange fluid inlet 32 ​​and the heat exchange fluid outlet 33 are respectively arranged on both sides, which can ensure the uniform distribution and sufficient flow of the fluid in the shell 3, thereby improving the heat exchange efficiency. Secondly, this layout is also conducive to reducing fluid resistance and pressure drop. By separately arranging the heat exchange fluid inlet 32 ​​and the heat exchange fluid outlet 33, it is possible to avoid the heat exchange fluid from generating large local resistance and pressure drop at the inlet and outlet, so that the heat exchange fluid can flow more smoothly and reduce energy loss. In addition, arranging the heat exchange fluid inlet 32 ​​and the heat exchange fluid outlet 33 on both sides of the shell 3 also facilitates the installation and maintenance of the equipment. In practical applications, the position and direction of the heat exchange fluid inlet 32 ​​and the heat exchange fluid outlet 33 can be flexibly selected according to the site conditions and the needs of the equipment layout, so that the installation of the equipment is more convenient. At the same time, this layout also facilitates the inspection and maintenance of import and export pipelines and valves.

[0045] In another embodiment of the present application, Figure 1 As shown, the heat exchange fluid inlet 32 ​​and the heat exchange fluid outlet 33 are each provided with an inlet and outlet pipe 5 with a flange structure. The inlet and outlet pipe 5 with a flange structure greatly enhances the connection strength and stability between the heat exchange fluid pipeline and the heat exchanger. As a common connection part, the flange has the characteristics of a strong structure and good sealing, which can ensure that the heat exchange fluid will not leak due to pipeline connection problems during the flow process.

[0046] In another embodiment of the present application, Figure 1 As shown, the shell 3 is also provided with a shell drain pipe and a shell exhaust pipe; the shell drain pipe is used to discharge the liquid accumulated inside the shell, which may be generated by condensation, leakage or other reasons during operation. By discharging these liquids in time, the dryness and cleanliness of the inside of the shell can be ensured, and the liquid can be prevented from corroding the equipment or affecting the heat exchange efficiency.

[0047] The shell exhaust pipe is used to discharge the non-condensable gas inside the shell. During the operation of the heat exchanger, due to changes in operating conditions or the influence of external factors, some non-condensable gases, such as air or other gases that do not participate in heat exchange, may accumulate in the shell. The presence of these gases will affect the heat transfer performance of the heat exchanger and reduce thermal efficiency. Through the setting of the shell exhaust pipe, these non-condensable gases can be discharged to keep the gas composition and pressure inside the shell stable, thereby ensuring the normal operation and high efficiency of the heat exchanger.

[0048] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A double-tube sheet heat exchanger with direct steam and electric heating functions, characterized in that: include: A plurality of tube-side heat exchange tubes, wherein the plurality of tube-side heat exchange tubes are arranged between two end plate assemblies; Each of the end plate assemblies is provided with an injection water inlet or an injection water outlet; the injection water inlet or the injection water outlet is connected to a cavity in the end plate assembly, and the cavity is connected to all the tube-side heat exchange tubes, so that the injection water in the injection water inlet flows through all the tube-side heat exchange tubes to the injection water outlet for discharge; The shell is arranged between the two end plate assemblies; the shell covers all the tube-side heat exchange tubes, the inner wall of the shell is provided with a heating jacket; and the two ends of the shell are respectively provided with a heat exchange fluid inlet and a heat exchange fluid outlet.

2. A straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 1, characterized in that: Each of the end plate assemblies comprises a cover plate and an outer welding end plate; the outer welding end plate is connected to the cover plate via a plurality of circumferentially arranged fasteners.

3. A straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 2, characterized in that: The outer welding end plate is provided with a plurality of mounting holes arranged in a circumferential array, and one end of the tube-side heat exchange tube is welded in each of the mounting holes.

4. A straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 3, characterized in that: The mounting hole of the outer welding end plate facing the side adjacent to the cover plate is circumferentially welded to the tube opening of the tube-side heat exchange tube.

5. The straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 2 is characterized in that: The cover plate is provided with a circular groove on one side facing the adjacent outer welding end plate.

6. A straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 5, characterized in that: The side wall of the circular groove is provided with an annular groove, and a sealing ring is arranged in the annular groove.

7. A straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 5, characterized in that: The injection water inlet or the injection water outlet is provided with a pipeline, and the end of the pipeline is provided with a conical flange.

8. The straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 7, characterized in that: The end surface of the conical flange is provided with a circle of arc-shaped grooves.

9. The straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 1, characterized in that: The heat exchange fluid inlet and the heat exchange fluid outlet are respectively located on two sides of the shell.

10. The straight-through double-tube sheet heat exchanger with dual functions of steam and electric heating according to claim 1, characterized in that: The heat exchange fluid inlet and the heat exchange fluid outlet are both provided with an inlet and outlet pipe with a flange structure.

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