Backwash pipeline of plate heat exchanger
By designing backflushing pipes in plate heat exchangers, and utilizing electrically operated valves and diversion pipes, cleaning without disassembly can be achieved, solving the scaling problem, improving cleaning efficiency, and protecting the equipment.
Patent Information
- Application Number
- CN202423059425.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In existing technologies, scaling problems in plate heat exchangers lead to low cleaning efficiency, and manual disassembly and cleaning operations are cumbersome, labor-intensive, and prone to damaging the equipment.
Design a backwashing pipeline for a plate heat exchanger. Reverse flow is achieved through an electrically operated switch valve and a diversion pipe. The cleaning process does not require disassembly of parts. Impurities and scale are discharged using the diversion pipe and a drain ball valve.
It enables a fast and simple cleaning process, improves cleaning efficiency, protects equipment, and extends its service life.
Smart Images
Figure CN223580773U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of plate heat exchangers, and specifically relates to a backflushing pipe for a plate heat exchanger. Background Technology
[0002] Plate heat exchangers, as highly efficient heat exchange devices, have been widely used in various fields such as food, machinery, metallurgy, sewage treatment, petrochemicals, and shipbuilding, becoming the dominant heat exchange equipment in urban district heating projects. Plate heat exchangers typically consist of a series of corrugated metal plates stacked together, fixed by clamping devices to form multiple heat exchange channels. During operation, two fluids at different temperatures flow within the channels, exchanging heat through thermal conduction via the metal plates. However, a significant problem faced by plate heat exchangers in actual operation is scaling and clogging. Because fluids often contain various impurities and dissolved substances, these substances easily deposit on the surface of the metal plates and within the channels during heat exchange, forming a scale layer. The presence of scale not only reduces heat exchange efficiency and increases energy consumption but can also lead to equipment damage and malfunctions. Currently, the main method for solving the scaling problem of plate heat exchangers is manual disassembly and cleaning. This method is cumbersome, inefficient, requires significant manpower and time, and can easily damage the heat exchanger, shortening its service life. Utility Model Content
[0003] Therefore, this utility model aims to solve the problem of low efficiency in manual disassembly and cleaning in the prior art.
[0004] Therefore, the technical solution adopted is a backflushing pipe for a plate heat exchanger according to this utility model, comprising: a plate heat exchanger, a heat source fluid inlet pipe and a heat source fluid outlet pipe provided at the right end of the plate heat exchanger, a first electric switch valve provided on the heat source fluid inlet pipe, a second electric switch valve provided on the heat source fluid outlet pipe, one end of a first detour pipe connected to the heat source fluid inlet pipe at the right side of the first electric switch valve, the other end of the first detour pipe connected to the heat source fluid outlet pipe at the left side of the second electric switch valve, a third electric switch valve provided on the first detour pipe, one end of a second detour pipe connected to the heat source fluid inlet pipe at the left side of the first electric switch valve, the other end of the second detour pipe connected to the heat source fluid outlet pipe at the right side of the second electric switch valve, and a fourth electric switch valve provided on the second detour pipe.
[0005] Preferably, a first gate valve is installed on the heat source fluid inlet pipe, and a second gate valve is installed on the heat source fluid outlet pipe.
[0006] Preferably, a heating fluid inlet pipe is provided at the right end of the plate heat exchanger near the heat source fluid outlet pipe, and a heating fluid outlet pipe is provided at the right end of the plate heat exchanger near the heat source fluid inlet pipe.
[0007] Preferably, a third gate valve is installed on the heating fluid inlet pipe and a fourth gate valve is installed on the heating fluid outlet pipe.
[0008] Preferably, a support is provided at the left end of the plate heat exchanger.
[0009] Preferably, the bracket has a base at its bottom, and the base has mounting holes.
[0010] Preferably, a drain pipe is installed on the right side of the second diversion pipe on the heat source fluid outlet pipe, and a drain ball valve is installed on the drain pipe.
[0011] This utility model's technical solution has the following advantages: By adjusting the normally closed first and second electric switching valves, and the normally open third and fourth electric switching valves, the plate heat exchanger is started. The heat source fluid enters from the heat source fluid inlet pipe, flows back into the hot flow channel of the plate heat exchanger through the first deflector pipe, then flows through the second deflector pipe, and exits through the heat source fluid outlet pipe. The backflushed impurities, turbidity, and scale are discharged through the bottom drain ball valve. Because the backflushing process does not require disassembly of parts, the operation is simple, and the plate heat exchanger is quickly restored to its working state, thus improving cleaning efficiency.
[0012] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.
[0013] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] The components are as follows: 1. Plate heat exchanger; 2. Heat source fluid inlet pipe; 3. Heat source fluid outlet pipe; 4. First electric switch valve; 5. Second electric switch valve; 6. First diversion pipe; 7. Third electric switch valve; 8. Second diversion pipe; 9. Fourth electric switch valve; 10. First gate valve; 11. Second gate valve; 12. Heating fluid inlet pipe; 13. Heating fluid outlet pipe; 14. Third gate valve; 15. Fourth gate valve; 16. Support; 17. Base; 18. Mounting hole; 19. Drain pipe; 20. Drain ball valve. Detailed Implementation
[0017] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.
[0019] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0021] This utility model provides a backflushing pipe for a plate heat exchanger, such as Figure 1As shown, the system includes: a plate heat exchanger 1, with a heat source fluid inlet pipe 2 and a heat source fluid outlet pipe 3 at its right end; a first electric switch valve 4 is installed on the heat source fluid inlet pipe 2, and a second electric switch valve 5 is installed on the heat source fluid outlet pipe 3; one end of a first diversion pipe 6 is connected to the heat source fluid inlet pipe 2 at the position to the right of the first electric switch valve 4, and the other end of the first diversion pipe 6 is connected to the heat source fluid outlet pipe 3 at the position to the left of the second electric switch valve 5; a third electric switch valve 7 is installed on the first diversion pipe 6; one end of a second diversion pipe 8 is connected to the heat source fluid inlet pipe 2 at the position to the left of the first electric switch valve 4, and the other end of the second diversion pipe 8 is connected to the heat source fluid outlet pipe 3 at the position to the right of the second electric switch valve 5; and a fourth electric switch valve 9 is installed on the second diversion pipe 8. A temperature sensor and a pressure sensor are installed inside the heat source fluid outlet pipe 3 to monitor the pressure and temperature within the pipe, checking whether the pressure and temperature reach the normal range to determine the degree of cleaning, terminate the backwashing process, and restore the normal heat exchange process.
[0022] A first gate valve 10 is installed on the heat source fluid inlet pipe 2, and a second gate valve 11 is installed on the heat source fluid outlet pipe 3, for controlling the opening or closing of the heat source fluid inlet pipe 2. A heating fluid inlet pipe 12 is installed on the right end of the plate heat exchanger 1 near the heat source fluid outlet pipe 3, and a heating fluid outlet pipe 13 is installed on the right end of the plate heat exchanger 1 near the heat source fluid inlet pipe 2, for the flow of the fluid to be heated. A third gate valve 14 is installed on the heating fluid inlet pipe 12 for controlling its opening or closing, and a fourth gate valve 15 is installed on the heating fluid outlet pipe 13 for controlling its opening or closing. A bracket 16 is installed on the left end of the plate heat exchanger 1 for mounting the plate heat exchanger. A base 17 is installed at the bottom of the bracket 16, and the base 17 has mounting holes 18 for fixing with bolts, facilitating installation and disassembly. A drain pipe 19 is installed on the right side of the second diversion pipe 8 on the heat source fluid outlet pipe 3. A drain ball valve 20 is installed on the drain pipe 19 to discharge the backflushed impurities, turbidity and scale through the bottom drain ball valve.
[0023] The normal heat exchange process of a plate heat exchanger is as follows: The heat source fluid enters from the heat source fluid inlet pipe 2, passes through the normally open first gate valve 10 and the normally open first electric switch valve 4, and enters the hot flow channel of the plate heat exchanger 1. Then, it passes through the normally open second electric switch valve 5 and the normally open second gate valve 11 and flows out from the heat source fluid outlet pipe 3. At the same time, the fluid to be heated enters from the heating fluid inlet pipe 12, passes through the normally open third gate valve 14, and enters the cold flow channel of the plate heat exchanger 1. The two fluids at different temperatures flow in the channel and exchange heat through the heat conduction of the metal plates. Then, the heated fluid flows out from the heating fluid outlet pipe 13 through the normally open fourth gate valve 15, completing the heat exchange process.
[0024] Backwashing process: The first electric switch valve 4 and the second electric switch valve 5 are normally closed, while the third electric switch valve 7 and the fourth electric switch valve 9 are normally open. This starts the plate heat exchanger 1, allowing the heat source fluid to enter through the heat source fluid inlet pipe 2, then flow backward through the first detour pipe 6 into the hot flow channel of the plate heat exchanger 1, and finally through the second detour pipe 8, exiting through the heat source fluid outlet pipe 3. Impurities, turbidity, and scale flushed out are discharged through the bottom drain ball valve. Because the backwashing process does not require disassembly of parts, it is simple to operate, quickly restores the plate heat exchanger to its working state, and improves cleaning efficiency.
[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A backflushing pipe for a plate heat exchanger, characterized in that, include: A plate heat exchanger (1) is provided with a heat source fluid inlet pipe (2) and a heat source fluid outlet pipe (3) at the right end of the plate heat exchanger (1). A first electric switch valve (4) is provided on the heat source fluid inlet pipe (2), and a second electric switch valve (5) is provided on the heat source fluid outlet pipe (3). One end of a first diversion pipe (6) is connected to the heat source fluid inlet pipe (2) at the right side of the first electric switch valve (4), and the other end of the first diversion pipe (6) is connected to the heat source fluid outlet pipe (3) at the left side of the second electric switch valve (5). A third electric switch valve (7) is provided on the first diversion pipe (6). One end of a second diversion pipe (8) is connected to the heat source fluid inlet pipe (2) at the left side of the first electric switch valve (4), and the other end of the second diversion pipe (8) is connected to the heat source fluid outlet pipe (3) at the right side of the second electric switch valve (5). A fourth electric switch valve (9) is provided on the second diversion pipe (8).
2. The backflushing pipe for a plate heat exchanger according to claim 1, characterized in that, A first gate valve (10) is installed on the heat source fluid inlet pipe (2), and a second gate valve (11) is installed on the heat source fluid outlet pipe (3).
3. The backflushing pipe for a plate heat exchanger according to claim 1, characterized in that, A heating fluid inlet pipe (12) is provided at the right end of the plate heat exchanger (1) near the heat source fluid outlet pipe (3), and a heating fluid outlet pipe (13) is provided at the right end of the plate heat exchanger (1) near the heat source fluid inlet pipe (2).
4. A backflushing pipe for a plate heat exchanger according to claim 3, characterized in that, A third gate valve (14) is installed on the heating fluid inlet pipe (12), and a fourth gate valve (15) is installed on the heating fluid outlet pipe (13).
5. A backflushing pipe for a plate heat exchanger according to claim 1, characterized in that, A bracket (16) is provided on the left end of the plate heat exchanger (1).
6. A backflushing pipe for a plate heat exchanger according to claim 5, characterized in that, The bracket (16) has a base (17) at its bottom end, and the base (17) has mounting holes (18).
7. A backflushing pipe for a plate heat exchanger according to claim 1, characterized in that, A drain pipe (19) is installed on the heat source fluid outlet pipe (3) to the right of the second diversion pipe (8), and a drain ball valve (20) is installed on the drain pipe (19).