Tube nest heat exchanger structure on vacuum-pumping system

Abstract

The utility model relates to a tube nest heat exchanger structure on a vacuum-pumping system, which relates to the technical field of heat exchange and comprises a heat exchanger shell, a heat medium flowing system and a cooling liquid flowing system which are arranged on the heat exchanger shell. Inlets of the thermal medium flowing system and the cooling liquid flowing system are both located on one side of the heat exchanger shell, and outlets of the thermal medium flowing system and the cooling liquid flowing system are both located on the other side of the heat exchanger shell. The inlet of the heat medium flowing system and the inlet of the cooling liquid flowing system are both formed in one side of the heat exchanger shell, and the outlet of the heat medium flowing system and the outlet of the cooling liquid flowing system are both formed in the other side of the heat exchanger shell, so that the layout of the radiator shell is adjusted; at the moment, the high-temperature heat medium can make full contact with the inlet end of the cooling liquid, the heat medium is fully cooled, the heat exchange effect can be guaranteed, and the problem that in the prior art, the heat exchange efficiency is poor is solved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, specifically to a tube heat exchanger structure for a vacuum system. Background Technology

[0002] Twin-screw extruders are equipped with a vacuum system. This system works by using a water ring pump and a vacuum pump to extract air from the extruder, maintaining a vacuum state. Because the water ring pump requires a certain amount of water to operate, a water ring forms inside the pump as the eccentric impeller rotates, facilitating gas intake, compression, and discharge. The discharged gas also carries away a significant amount of water. Therefore, the water ring pump requires a large amount of water for extended operation. To reduce water waste, users typically connect the exhaust port to a water tank, where the water is then recirculated back into the pump. However, the high temperature of the extracted gas from the twin-screw extruder causes the water temperature in the tank to rise, preventing the water ring pump from functioning properly. Therefore, the water outlet of the tank usually passes through a heat exchanger to lower the water temperature before it is pumped into the water ring pump.

[0003] In the above technical solution, when the suction water temperature of the water ring pump is higher than 22 degrees Celsius, the water ring pump will alarm and stop operating. The existing heat exchanger uses the same end of the heat exchanger with the chilled water inlet and chilled water outlet. This layout is unreasonable, resulting in poor heat exchange effect. At the same time, the heat exchange area is insufficient, affecting the heat exchanger's exchange efficiency. In particular, when the chilled water temperature at the cold end of the heat exchanger is lower than 15 degrees Celsius, the water temperature at the hot end of the heat exchanger (the water pumped in) will exceed 22 degrees Celsius, causing the vacuum system to alarm and stop working. Utility Model Content

[0004] The technical problem solved by this utility model is to address the issue that in the prior art, the chilled water inlet and chilled water outlet are located at the same end of the heat exchanger, resulting in poor heat exchange performance.

[0005] This utility model can be achieved through the following technical solution: a tube-and-shell heat exchanger structure for a vacuum system, including a heat exchanger shell, a heat medium flow system for cooling the heat medium is provided on the heat exchanger shell, and a coolant flow system for cooling is provided on the heat exchanger shell. The inlets of the heat medium flow system and the coolant flow system are both located on one side of the heat exchanger shell, and the outlets of the heat medium flow system and the coolant flow system are both located on the other side of the heat exchanger shell.

[0006] A further technical improvement of this utility model is that the heat medium flow system includes a heat medium inlet, a heat dissipation pipe, and a heat medium outlet. The heat medium inlet and the heat medium outlet are located on both sides of the heat exchanger shell, and the heat dissipation pipe is fixedly installed inside the heat exchanger shell, and the heat dissipation pipe is connected to the heat medium inlet and the heat medium outlet, respectively.

[0007] A further technical improvement of this utility model is that the coolant flow system includes a cold inlet and a cold outlet, which are respectively connected and installed at both ends of the heat exchanger housing.

[0008] A further technical improvement of this utility model is that the heat medium flow system includes a heat medium inlet, a heat dissipation coil, and a heat medium outlet. The heat medium inlet and the heat medium outlet are located on both sides of the heat exchanger shell, and the heat dissipation coil is fixedly installed inside the heat exchanger shell. The heat dissipation coil is connected to the heat medium inlet and the heat medium outlet, respectively.

[0009] A further technical improvement of this utility model is that: an intermediate support pipe is fixedly installed inside the heat exchanger shell, the intermediate support pipe is fixedly installed in the middle of the heat dissipation coil, and the intermediate support pipe is connected to an internal water inlet pipe and an internal water outlet pipe respectively.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This application adjusts the layout of the radiator shell by installing the inlets of both the heat medium flow system and the coolant flow system on one side of the heat exchanger shell and the outlets of both the heat medium flow system and the coolant flow system on the other side of the heat exchanger shell. This allows the higher-temperature heat medium to fully contact the inlet of the coolant, effectively cooling the heat medium and ensuring the heat exchange effect, thus solving the problem of poor heat exchange efficiency in the prior art.

[0012] 2. This application utilizes internal support pipes to achieve the flow rate of the coolant. The flow rate of the coolant in the internal support pipes is greater than that of the coolant inside the heat exchanger housing. Through contact heat conduction, the heat of the heat medium inside the heat dissipation coil can be quickly absorbed by the coolant inside the internal support pipes, thereby ensuring the cooling effect of the heat medium. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram showing the positions of the heat medium flow system and the coolant flow system of this utility model;

[0015] Figure 2 This is a schematic diagram showing the location of the heat dissipation coil of this utility model.

[0016] In the diagram: 1. Heat exchanger housing; 2. Cold water inlet; 3. Hot medium inlet; 4. Support base; 5. Cold water outlet; 6. Hot medium outlet; 7. Intermediate support pipe; 8. Internal water inlet pipe; 9. Radiator coil; 10. Internal water outlet pipe; 11. Sealing plug. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Please see Figure 1-2 As shown, a tube-and-shell heat exchanger structure for a vacuum system includes a heat exchanger housing 1. A sealing plug 11 for sealing the housing is fixedly installed on the heat exchanger housing 1. A heat medium inlet 3 and a heat medium outlet 6 are installed on the heat exchanger housing 1 for heat exchange. A cold water inlet 2 for coolant entry and a cold water outlet 5 for coolant discharge are also installed on the heat exchanger housing 1. In use, the cold water inlet 2 and cold water outlet 5 allow coolant to enter and exit, fully filling the interior of the heat exchanger housing 1. The heat medium inlet 3 and heat medium outlet 6 are connected by a heat dissipation pipe, which is in full contact with the coolant and exchanges heat with it, thus achieving heat exchange processing of the heat medium.

[0019] Example 1

[0020] In this application, the cold inlet 2 and the cold outlet 5 are respectively located on both sides of the heat exchanger housing 1, and the hot medium inlet 3 and the hot medium outlet 6 are respectively located on both sides of the heat exchanger housing 1, with the hot medium inlet 3 closer to the cold inlet 2 and the hot medium outlet 6 closer to the cold outlet 5. In this technical solution, cool water with a lower temperature enters through the cold inlet 2, which can quickly cool the hot water entering through the hot medium inlet 3. As the water flow directions of the hot medium inlet 3 and the cold inlet 2 are consistent, the hot medium can be further cooled sufficiently. If the liquid flow rate entering through the cold inlet 2 is ensured to be greater than the flow rate of the hot medium, the hot medium can be further cooled sufficiently. This method can also initially increase the heat exchange area and ensure the heat exchange effect. When the chilled water supply temperature is higher than 15 degrees Celsius, the water temperature injected into the water ring pump will not exceed 22 degrees Celsius to maintain the stability of the system and prevent the water ring pump from alarming and stopping operation.

[0021] Example 2

[0022] In this application, the heat dissipation pipe is replaced with a heat dissipation coil 9, which is fixedly installed inside the heat exchanger housing 1. The heat dissipation coil 9 can fully contact the coolant. This operation increases the contact length between the heat medium and the coolant by extending the original length of the heat dissipation pipe, thereby extending the contact time between the heat medium and the coolant and achieving sufficient cooling of the heat medium. Therefore, the two ends of the heat dissipation coil 9 are respectively connected and installed on the heat medium inlet 3 and the heat medium outlet 6, which can ensure that the heat medium enters through the heat medium inlet 3, fully contacts the coolant through the heat dissipation coil 9, and is discharged through the heat medium outlet 6, thus achieving sufficient cooling of the heat medium.

[0023] Example 3

[0024] This application also includes an intermediate support pipe 7, with an internal water inlet pipe 8 and an internal water outlet pipe 10 respectively at both ends. The internal water inlet pipe 8 and the cold water inlet 2 are respectively located on the same side of the heat exchanger housing 1, and the internal water outlet pipe 10 and the cold water outlet 5 are respectively located on the same side of the heat exchanger housing 1. The intermediate support pipe 7 passes through the center of the heat dissipation coil 9 and is attached to the inner wall of the heat dissipation coil 9. In use, the intermediate support pipe 7 is also used to realize the flow of coolant, but the flow velocity of coolant in the intermediate support pipe 7 is greater than the flow velocity of coolant inside the heat exchanger housing 1. Through contact heat conduction, the heat of the heat medium inside the heat dissipation coil 9 can be quickly absorbed by the coolant inside the intermediate support pipe 7 to ensure the cooling effect of the heat medium, further ensure the heat exchange effect, and ensure that the temperature of the water pumped into the water ring pump does not exceed 22 degrees Celsius.

[0025] In use, this invention first allows coolant to enter through the cold inlet 2, ensuring the coolant fully fills the interior of the heat exchanger housing 1. Then, the coolant is discharged through the cold outlet 5, achieving a liquid balance within the heat exchanger housing 1. Next, the hot medium flows in through the hot medium inlet 3, then passes through internal heat dissipation pipes and exits through the hot medium outlet 6. During this process, because the cold inlet 2 and hot medium inlet 3 are located at the same end, and the hot medium outlet 6 and cold outlet 5 are also located at the same end, it ensures that the higher-temperature hot medium can contact the cooler coolant, rapidly cooling the hot medium. When the hot medium flows to one side of the hot medium outlet 6... When the heat exchanger is in use, the heat inside the heat exchanger is fully absorbed. When the heat exchanger coil 9 is used, its two ends are connected to the heat exchanger inlet 3 and the heat exchanger outlet 6, respectively. This ensures that the heat exchanger enters through the heat exchanger inlet 3, comes into full contact with the coolant through the heat exchanger coil 9, and is discharged through the heat exchanger outlet 6, thus achieving sufficient cooling of the heat exchanger. At this time, the intermediate support pipe 7 is also used to realize the flow of coolant. However, the flow rate of coolant in the intermediate support pipe 7 is greater than the flow rate of coolant inside the heat exchanger shell 1. Through heat conduction, the heat inside the heat exchanger coil 9 can be quickly absorbed by the coolant inside the intermediate support pipe 7 to ensure the cooling effect of the heat exchanger.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tube-and-shell heat exchanger structure for a vacuum system, comprising a heat exchanger housing (1), wherein a heat medium flow system for cooling the heat medium is provided on the heat exchanger housing (1), and a coolant flow system for cooling is provided on the heat exchanger housing (1), characterized in that: The inlets of the heat medium flow system and the coolant flow system are both located on one side of the heat exchanger housing (1), and the outlets of the heat medium flow system and the coolant flow system are both located on the other side of the heat exchanger housing (1).

2. The tube-and-shell heat exchanger structure for a vacuum system according to claim 1, characterized in that, The heat medium flow system includes a heat medium inlet (3), a heat dissipation pipe and a heat medium outlet (6). The heat medium inlet (3) and the heat medium outlet (6) are located on both sides of the heat exchanger housing (1), and the heat dissipation pipe is fixedly installed inside the heat exchanger housing (1). The heat dissipation pipe is connected to the heat medium inlet (3) and the heat medium outlet (6).

3. The tube-and-shell heat exchanger structure for a vacuum system according to claim 1, characterized in that, The coolant flow system includes a cold inlet (2) and a cold outlet (5), which are respectively connected and installed at both ends of the heat exchanger housing (1).

4. The tube-and-shell heat exchanger structure for a vacuum system according to claim 1, characterized in that, The heat medium flow system includes a heat medium inlet (3), a heat dissipation coil (9), and a heat medium outlet (6). The heat medium inlet (3) and the heat medium outlet (6) are located on both sides of the heat exchanger housing (1), and the heat dissipation coil (9) is fixedly installed inside the heat exchanger housing (1). The heat dissipation coil (9) is connected to the heat medium inlet (3) and the heat medium outlet (6).

5. The tube-and-shell heat exchanger structure for a vacuum system according to claim 4, characterized in that, An intermediate support pipe (7) is fixedly installed inside the heat exchanger housing (1). The intermediate support pipe (7) is fixedly installed in the middle of the heat dissipation coil (9), and the intermediate support pipe (7) is connected to an internal water inlet pipe (8) and an internal water outlet pipe (10).

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