Self-cleaning heat exchanger
By introducing technical means such as power devices and injection devices into the heat exchanger, a cleaning process without disassembly is achieved, the problem of dirt accumulation in the heat exchange plate is solved, the heat exchange efficiency is improved, and the cost is reduced, and online monitoring and automatic control.
Patent Information
- Application Number
- CN202323508287.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-21
AI Technical Summary
During long-term use of existing heat exchangers, due to impurities or scale in the fluid, the surface area of the heat exchange plate accumulates dirt or scale, which reduces heat exchange efficiency and increases operating costs. Common cleaning methods require disassembly of equipment, which is time-consuming and labor-intensive and may Damage or corrode the heat exchange plate.
A self-cleanable heat exchanger is designed. Through the power device, injection device, control valve and liquid discharge device, the heat exchanger can be cleaned without disassembly. Pure water is used as cleaning medium and exchanged through the injection device. The hot plates are cleaned and monitored online and automatically controlled by pressure components and temperature sensors.
It realizes the cleaning of heat exchangers without disassembly, saves manpower and time, improves cleaning effect and safety, improves heat exchange efficiency and heat exchange, and reduces operating costs and maintenance costs.
Smart Images
Figure CN222336149U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cooling, in particular to a self-cleaning heat exchanger. Background Art
[0002] A heat exchanger is a device that can transfer heat between two or more fluids. It is widely used in chemical, electric power, metallurgy and other fields. A heat exchanger is usually composed of multiple heat exchange plates. A flow channel is formed between every two adjacent heat exchange plates. Different fluids flow in different channels and transfer heat through the heat exchange plates. However, during long-term use, due to the presence of impurities or scale in the fluid, dirt or scaling will accumulate on the surface of the heat exchange plate, thereby reducing the heat exchange efficiency and heat exchange amount, and increasing operating costs and maintenance costs. Therefore, the heat exchanger needs to be cleaned regularly to restore its performance. However, the commonly used cleaning methods currently require the disassembly of the heat exchanger before cleaning the heat exchange plate. The entire cleaning process is time-consuming and labor-intensive, and may cause damage or corrosion to the heat exchange plate, affecting the service life of the heat exchanger. Utility Model Content
[0003] The purpose of the utility model is to provide a self-cleaning heat exchanger, which can clean the heat exchanger without disassembling the heat exchanger, reduce operating costs and maintenance costs, and improve the heat exchange efficiency and heat exchange capacity of the heat exchanger.
[0004] The above-mentioned optimized structure of the utility model is realized by the following technical scheme: a self-cleaning heat exchanger, comprising a heat exchanger body, the heat exchanger body comprising a fixed frame plate and a movable pressing plate, a heat exchange plate assembly is arranged between the fixed frame plate and the movable pressing plate, and also comprising a power device, the power device is connected to the heat exchanger body and can transport a cleaning medium into the heat exchanger body;
[0005] A spray device, which can spray the cleaning medium in the heat exchanger body onto the heat exchange plate assembly to clean the heat exchange plate assembly;
[0006] A control valve is provided between the power device and the heat exchanger body, and can control the connection and disconnection between the power device and the heat exchanger body;
[0007] The liquid discharge device can discharge the cleaning medium after cleaning the heat exchange plate assembly.
[0008] In some embodiments, the fixed frame plate is provided with a cold inlet, a cold outlet, a hot inlet, and a hot outlet on the side away from the heat exchange plate assembly. The cold inlet, the cold outlet and the heat exchange plate assembly together constitute a cooling water flow channel, and the hot inlet, the hot outlet and the heat exchange plate assembly together constitute a chilled water flow channel.
[0009] In some embodiments, the heat exchange plate assembly includes at least four heat exchange plates, the fixed frame plate is provided with a boss on the side close to the heat exchange plate and the side of the heat exchange plate away from the fixed frame plate, the movable clamping plate is provided with a groove on the side close to the heat exchange plate and the side of the heat exchange plate away from the movable clamping plate, the boss and the groove can be plugged together and are connected to the power device and the injection device.
[0010] In some embodiments, the spray device includes a plurality of first spray heads connected to the bosses and a plurality of second spray heads connected to the grooves, and the first spray heads and the second spray heads can clean the heat exchange plate.
[0011] In some embodiments, a first pressure component and a second pressure component are further included. The first pressure component can measure the liquid pressure difference between the cold inlet and the cold outlet, and the second pressure component can measure the liquid pressure difference between the hot inlet and the hot outlet.
[0012] In some embodiments, the liquid outlet device includes a first liquid outlet connected to the hot outlet and a second liquid outlet connected to the cold inlet, the first liquid outlet and the second liquid outlet are both connected to an extraction device, and the extraction device is electrically connected to the control system.
[0013] In some embodiments, the power device is a water pump, and the cleaning medium is pure water.
[0014] In some embodiments, a control system is also included, which is electrically connected to the power device, the control valve, the first pressure component, and the second pressure component.
[0015] In some embodiments, the control system also includes a temperature sensor, which is respectively arranged at the cold inlet, the cold outlet, the hot inlet, and the hot outlet, and is electrically connected to the control system. The control system can calculate the heat exchange efficiency of the heat exchanger based on the measured temperature.
[0016] In summary, the utility model has the following beneficial effects:
[0017] This self-cleaning heat exchanger can be cleaned without disassembling the heat exchanger by setting up a power device, a spray device, a control valve, a liquid outlet device and a control system, saving manpower and time, and improving the cleaning effect and safety. At the same time, by setting up a pressure component and a temperature sensor, online monitoring and automatic control of the heat exchanger are realized, the cleaning cycle and cleaning time can be adjusted according to actual conditions, and abnormal conditions can be discovered and handled in time, thereby improving heat exchange efficiency and heat exchange, and reducing operating costs and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the utility model;
[0019] Figure 2 It is a cross-sectional view of the heat exchange plate assembly of the utility model;
[0020] Figure 3 It is an enlarged view of point A of the present utility model.
[0021] In the figure: 1. heat exchanger body; 11. fixed frame plate; 12. movable pressing plate; 13. heat exchange plate assembly; 2. power device; 3. control valve; 4. liquid outlet device. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] like Figures 1 to 3 As shown, the utility model provides a self-cleaning heat exchanger, including a heat exchanger body 1, the heat exchanger body 1 includes a fixed frame plate 11, a movable clamping plate 12, a heat exchange plate assembly 13 is provided between the fixed frame plate 11 and the movable clamping plate 12, and also includes a power device 2, an injection device, a control valve 3, a liquid outlet device 4 and a control system.
[0024] A cold inlet, a cold outlet, a hot inlet, and a hot outlet are provided on the side of the fixed frame plate 11 away from the heat exchange plate assembly 13. The cold inlet, the cold outlet, and the heat exchange plate assembly 13 together constitute a cooling water flow channel, and the hot inlet, the hot outlet, and the heat exchange plate assembly 13 together constitute a chilled water flow channel. Under normal working conditions, cooling water enters the heat exchanger body 1 from the cold inlet, transfers heat with the heat exchange plate assembly 13 in the cooling water flow channel, and then flows out from the cold outlet. Similarly, chilled water enters the heat exchanger body 1 from the hot inlet, transfers heat with the heat exchange plate assembly 13 in the chilled water flow channel, and then flows out from the hot outlet. Due to the temperature difference between the two fluids, the heat exchanger body 1 realizes heat exchange between the two fluids.
[0025] like Figure 2As shown, the heat exchange plate assembly 13 includes at least four heat exchange plates, and a flow channel is formed between every two adjacent heat exchange plates. In order to increase the heat transfer area and heat transfer coefficient, each heat exchange plate is provided with corrugations of a certain shape and specification. In order to achieve the self-cleaning function, a boss is provided on the side of the fixed frame plate 11 close to the heat exchange plate and the side of the heat exchange plate away from the fixed frame plate 11. The boss can be annular, and the cross section of the boss can be trapezoidal, triangular, or square; the boss and the groove on the same heat exchange plate are connected and arranged; the movable clamping plate 12 is close to the heat exchange plate and the side of the heat exchange plate away from the movable clamping plate 12. The groove can be annular, and the cross section of the groove can be trapezoidal, triangular, or square; the boss and the groove can be plugged and matched and are connected to the power device 2 and the injection device. In the cleaning state, the power device 2 transports the cleaning medium into the heat exchanger body 1, and enters each flow channel through the boss and the groove respectively, and then cleans the heat exchange plate through the injection device.
[0026] The spray device may include a plurality of first spray heads connected to the bosses and a plurality of second spray heads connected to the grooves. The first spray heads and the second spray heads can clean the heat exchange plate. A plurality of corresponding first spray heads and second spray heads are provided in each flow channel. They are aligned with the surface of the heat exchange plate at a certain angle and distance. When the cleaning medium enters from the power device 2, they spray the cleaning medium onto the heat exchange plate at a certain pressure and speed, thereby flushing away the dirt or scale. In order to improve the cleaning effect, the first spray head and the second spray head can be set to be rotatable or swingable to achieve full coverage of the surface of the heat exchange plate. Both the first spray head and the second spray head can be one-way spray heads, which can effectively prevent the backflow of the liquid and avoid contact between the liquid in the cooling water flow channel and the chilled water flow channel during the heat exchange process of the heat exchanger.
[0027] In some embodiments, it also includes a first pressure component and a second pressure component. The first pressure component can measure the liquid pressure difference between the cold inlet and the cold outlet, and the second pressure component can measure the liquid pressure difference between the hot inlet and the hot outlet. The first pressure component and the second pressure component are both electrically connected to the control system. The values fed back to the control system by the first pressure component and the second pressure component can be used to determine whether there is dirt or scale blockage in the heat exchanger body 1, thereby determining whether cleaning is needed, and the control system can automatically control the cleaning after the value reaches the set value.
[0028] In some embodiments, the liquid outlet device 4 includes a first liquid outlet connected to the hot outlet and a second liquid outlet connected to the cold inlet. The first liquid outlet and the second liquid outlet are both connected to an extraction device, and the extraction device is electrically connected to a control system. In the cleaning state, when the cleaning medium passes through the heat exchange plate assembly 13, some dirt or scale will be taken away. In order to prevent these pollutants from being re-deposited on the heat exchange plate or affecting the quality of the fluid, they need to be discharged in time. Therefore, during the cleaning process, the pollutants are extracted from the first liquid outlet and the second liquid outlet by opening the extraction device. In this way, the fluid dirt, scale and cleaning medium in the heat exchanger body 1 can be discharged to avoid contamination of the heat exchange medium during subsequent heat exchange.
[0029] In some embodiments, the power device 2 may be a water pump, and the cleaning medium may be pure water. Pure water is a colorless, odorless water that does not contain organic matter and inorganic salts. It has good solubility and cleanliness, and can effectively remove dirt or scale on the heat exchange plate without causing corrosion or damage to the heat exchange plate. A water pump is a device that can transport or pressurize liquids, and can adjust the flow and pressure of the cleaning medium as needed to meet different cleaning requirements.
[0030] In some embodiments, the control system also includes a temperature sensor, which is respectively arranged at the cold inlet, cold outlet, hot inlet, and hot outlet, and is electrically connected to the controller. The control system can calculate the heat exchange efficiency of the heat exchanger according to the measured temperature and display the relevant information on the display. The temperature sensor is a device that can measure the temperature of the fluid, which can reflect the heat transfer of the heat exchanger in real time. By measuring the inlet temperature and outlet temperature of the two fluids, the heat exchange efficiency of the heat exchanger can be calculated, that is, the ratio of the actual heat transferred between the two fluids to the theoretical heat transferred. The higher the heat exchange efficiency, the better the performance of the heat exchanger. By displaying the heat exchange efficiency on the display, it is convenient for users to understand and evaluate the working effect of the heat exchanger.
[0031] The working principle of the utility model is as follows:
[0032] Under normal working conditions, cooling water enters the heat exchanger body 1 from the cold inlet, transfers heat with the heat exchange plate assembly 13 in the cooling water flow channel, and then flows out from the cold outlet. Similarly, chilled water enters the heat exchanger body 1 from the hot inlet, transfers heat with the heat exchange plate assembly 13 in the chilled water flow channel, and then flows out from the hot outlet. At this time, the control valve 3 is closed, the power device 2 and the extraction device stop working, and the cleaning medium does not enter the heat exchanger body 1.
[0033] In the cleaning state, when the control system detects that the pressure difference between the two fluids reaches the preset cleaning threshold, or performs scheduled cleaning according to the cleaning cycle and cleaning time set by the user, the control system will start the power device 2 and the extraction device, and open the control valve 3 to allow the cleaning medium to enter the heat exchanger body 1, and clean the heat exchange plate assembly 13 through the injection device. At the same time, the control system will close the inlet control valve and outlet control valve of the cooling water and the chilled water to stop the flow of the two fluids. When the cleaning is completed, the control system will shut down the power device 2 and the extraction device, and close the control valve 3 to stop the cleaning medium from entering the heat exchanger body 1, and discharge the cleaned cleaning medium through the liquid outlet device 4. At the same time, the control system will open the inlet control valve and outlet control valve of the cooling water and the chilled water to resume the flow of the two fluids. At this time, the dirt or scale in the heat exchanger body 1 has been removed, and the heat exchange efficiency and heat exchange amount have been improved.
[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A self-cleaning heat exchanger, comprising a heat exchanger body (1), wherein the heat exchanger body (1) comprises a fixed frame plate (11) and a movable pressing plate (12), and a heat exchange plate assembly (13) is arranged between the fixed frame plate (11) and the movable pressing plate (12), characterized in that: Also includes A power device (2), the power device (2) being in communication with the heat exchanger body (1) and capable of conveying a cleaning medium into the heat exchanger body (1); A spray device, wherein the spray device can spray the cleaning medium in the heat exchanger body (1) onto the heat exchange plate assembly (13), thereby cleaning the heat exchange plate assembly (13); A control valve (3) is provided between the power device (2) and the heat exchanger body (1) and can control the connection and disconnection between the power device (2) and the heat exchanger body (1); The liquid discharge device (4) can discharge the cleaning medium after cleaning the heat exchange plate assembly (13).
2. A self-cleanable heat exchanger according to claim 1, characterized in that: The fixed frame plate (11) is provided with a cold inlet, a cold outlet, a hot inlet and a hot outlet on the side away from the heat exchange plate assembly (13); the cold inlet, the cold outlet and the heat exchange plate assembly (13) together constitute a cooling water flow channel; the hot inlet, the hot outlet and the heat exchange plate assembly (13) together constitute a chilled water flow channel.
3. The self-cleanable heat exchanger according to claim 1, characterized in that: The heat exchange plate assembly (13) comprises at least four heat exchange plates. The fixed frame plate (11) is provided with a boss on one side close to the heat exchange plate and on one side away from the fixed frame plate (11). The movable clamping plate (12) is provided with a groove on one side close to the heat exchange plate and on one side away from the movable clamping plate (12). The boss and the groove can be plugged in and matched and are both connected to the power device (2) and the injection device.
4. A self-cleaning heat exchanger according to claim 3, characterized in that: The injection device includes a plurality of first nozzles connected to the bosses and a plurality of second nozzles connected to the grooves. The first nozzles and the second nozzles can clean the heat exchange plate.
5. The self-cleanable heat exchanger according to claim 2, characterized in that: The invention also includes a first pressure component and a second pressure component. The first pressure component can measure the pressure difference of the liquid between the cold inlet and the cold outlet, and the second pressure component can measure the pressure difference of the liquid between the hot inlet and the hot outlet.
6. A self-cleanable heat exchanger according to claim 2, characterized in that: The liquid outlet device (4) comprises a first liquid outlet connected to the hot outlet and a second liquid outlet connected to the cold inlet, and the first liquid outlet and the second liquid outlet are both connected to an extraction device.
7. The self-cleanable heat exchanger according to claim 1, characterized in that: The power device (2) is a water pump, and the cleaning medium is pure water.
8. The self-cleanable heat exchanger according to claim 5, characterized in that: It also includes a control system, which is electrically connected to the power device (2), the control valve (3), the first pressure component, and the second pressure component.
9. A self-cleanable heat exchanger according to claim 8, characterized in that: The control system includes temperature sensors, which are respectively arranged at the cold inlet, the cold outlet, the hot inlet, and the hot outlet, and are electrically connected to the control system. The control system can calculate the heat exchange efficiency of the heat exchanger based on the measured temperature.