Heat exchanger backwash device

Abstract

The utility model relates to heat exchanger backwash technical field proposes a kind of heat exchanger backwash device, the design includes heat exchanger body, and heat exchanger body import and export are respectively fixedly connected with cooling water import pipeline and cooling water export pipeline, and heat exchanger body outside is provided with additional pipeline, and additional pipeline both ends are respectively communicated with cooling water import pipeline and cooling water export pipeline, and additional pipeline outside is also provided with the dosing assembly that can cooperate additional pipeline realizes to heat exchanger body circulation backwash;The design passes through dosing assembly, self-cleaning filter screen and multi-way valve design, solve the problem that single cleaning mode, filter screen maintenance is inconvenient in contrast file, realize efficient, automated and low-maintenance backwash function.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger backflushing technology, specifically, to a heat exchanger backflushing device. Background Technology

[0002] A heat exchanger is a device that facilitates heat exchange and is widely used in numerous industries such as chemical, power, and heating. It transfers heat from a high-temperature fluid to a low-temperature fluid through the contact of fluids at different temperatures, thereby heating or cooling materials. Common types include shell-and-tube, plate, and spiral plate heat exchangers. During long-term operation, impurities and scale accumulate inside the heat exchanger. These deposits adhere to the surface of the heat exchange tubes, creating thermal resistance, significantly reducing heat exchange efficiency, increasing energy consumption, and potentially causing localized overheating and equipment damage. Backflushing is an effective method to solve this problem. It uses a fluid with a certain pressure and flow rate to flush the heat exchanger in the opposite direction of normal operation. The reverse water flow powerfully washes away the scale adhering to the inner wall of the heat exchange tubes, allowing it to be discharged from the equipment. Backflushing is relatively simple, requires no disassembly of the heat exchanger, can be performed periodically, effectively maintains the heat exchanger's performance, extends equipment lifespan, ensures stable system operation, and reduces maintenance costs.

[0003] CN221223511U discloses a heat exchanger backwashing device, including a heat exchanger body, an inlet pipe connected to the inlet of the heat exchanger body, and a return pipe connected to the outlet of the heat exchanger body. The other end of the inlet pipe is fixedly connected to a cooling zone. In this invention, by connecting the inlet and outlet of the heat exchanger body to the inlet and return pipes respectively, when cleaning the heat exchanger is required, the return water pressure in the return water zone flushes the liquid inside the return pipe into the heat exchanger body. The flushed wastewater is then discharged from the inlet of the heat exchanger body and discharged to the outside through the drain pipe. This allows for flushing without stopping the machine and without disassembling the structure. Simultaneously, the inlet and return valves can be closed, and the circulation valve opened, allowing cooling water from the cooling zone to enter the return pipe from the central pipe and then discharge the wastewater from the drain pipe on the inlet pipe, thus completing enhanced backwashing and significantly improving the cleaning effect.

[0004] The problem with the aforementioned heat exchanger backflushing device is that: This design only uses reverse water flow to flush away dirt, so the cleaning effect is limited for stubborn dirt (such as calcium and magnesium deposits or biofilms), especially for highly adhesive dirt that is difficult to remove completely; at the same time, the filter structure in this design is prone to clogging after long-term use, requiring manual cleaning after shutdown, which affects continuous operation. Utility Model Content

[0005] This invention proposes a heat exchanger backflushing device, which solves the problems of limited cleaning effect on stubborn dirt and easy accumulation and clogging of impurities in the filter structure after long-term use in the prior art.

[0006] The technical solution of this utility model is as follows: A heat exchanger backwashing device includes a heat exchanger body, a cooling water inlet pipe and a cooling water outlet pipe fixedly connected to the inlet and outlet of the heat exchanger body, respectively, an auxiliary pipe is provided on the outside of the heat exchanger body, the two ends of the auxiliary pipe are respectively connected to the cooling water inlet pipe and the cooling water outlet pipe, and a dosing component is also provided on the outside of the auxiliary pipe to cooperate with the auxiliary pipe to realize the circulation backwashing of the heat exchanger body.

[0007] Preferably, an inlet valve is fixedly installed on the outside of the cooling water inlet pipe.

[0008] Preferably, a first control valve is fixedly installed on one side of the added pipe, and a pump body is fixedly installed on the other side of the added pipe.

[0009] Preferably, the dosing assembly includes a dosing chamber with slots on both sides, and the dosing chamber is engaged with the middle of the dosing pipe through the slots.

[0010] Preferably, the dosing assembly further includes a dosing channel, which is fixedly connected to the outside of the dosing chamber and communicates with the inside of the dosing chamber.

[0011] Preferably, the dosing assembly further includes a filter plate, which is fixedly connected to the inside of the dosing chamber.

[0012] Preferably, the dosing assembly further includes an inner rotating sleeve, one side of which is rotatably connected to a ball bearing. The inner rotating sleeve is rotatably connected to the inside of the dosing chamber via the ball bearing. The dosing assembly also includes a shaft column, which is fixedly connected to the middle of the inner rotating sleeve. The dosing assembly also includes three sets of brush rods, which are fixedly connected to the outside of the shaft column in a ring. The brush rods are in contact with the filter screen. The dosing assembly also includes a folding plate, which is fixedly connected to the outside of the inner rotating sleeve in a ring. The folding plate corresponds to the position of the drug inlet channel.

[0013] Preferably, an outlet valve is fixedly installed on the middle of the outer side of the cooling water outlet pipe.

[0014] Preferably, a first branch pipe is provided on one side of the added pipe, one end of the first branch pipe is fixedly connected to the added pipe, and the other end of the first branch pipe is fixedly connected to the cooling water outlet pipe. A second branch pipe is provided on the other side of the added pipe, one end of the second branch pipe is fixedly connected to the added pipe, and the other end of the second branch pipe is fixedly connected to the cooling water outlet pipe. A three-way ball valve is fixedly connected at the connection between the added pipe, the first branch pipe, and the second branch pipe.

[0015] Preferably, the cooling water outlet pipe is equipped with a tower pool at the end away from the heat exchanger body.

[0016] The beneficial effects of this utility model are as follows: This design adds a dosing component (dosing chamber and dosing channel), which can inject cleaning solution and achieve dual cleaning of chemical and physical methods by combining water circulation, significantly improving cleaning efficiency; at the same time, this design sets a filter plate in the dosing chamber and is equipped with a rotating brush rod (driven by the inner rotating sleeve). The flow of the solution drives the folding plate to rotate, automatically cleaning the filter screen, avoiding clogging and reducing maintenance frequency. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall device of this utility model; Figure 2 This is a cross-sectional view of the dosing chamber of this utility model; Figure 3 This is a schematic diagram showing the disassembled filter plate and inner rotating sleeve of this utility model; Figure 4 for Figure 3 Enlarged view of region A; In the diagram: 1. Heat exchanger body; 2. Cooling water inlet pipe; 21. Inlet valve; 3. Additional pipe; 31. First control valve; 32. Pump body; 33. Three-way ball valve; 331. First branch pipe; 332. Second branch pipe; 4. Dosing assembly; 41. Dosing chamber; 411. Inlet channel; 412. Slot; 42. Filter screen; 43. Inner rotating sleeve; 431. Bending plate; 432. Ball bearing; 44. Shaft; 441. Brush rod; 5. Cooling water outlet pipe; 51. Outlet valve; 6. Tower pool. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0020] Please see Figures 1-4 This utility model provides a technical solution: a heat exchanger backwashing device, including a heat exchanger body 1, a cooling water inlet pipe 2 and a cooling water outlet pipe 5 fixedly connected to the inlet and outlet of the heat exchanger body 1 respectively, an auxiliary pipe 3 is provided on the outside of the heat exchanger body 1, the two ends of the auxiliary pipe 3 are connected to the cooling water inlet pipe 2 and the cooling water outlet pipe 5 respectively, and a dosing component 4 is also provided on the outside of the auxiliary pipe 3 to cooperate with the auxiliary pipe 3 to realize the circulation backwashing of the heat exchanger body 1; This design, through the addition of a dosing component, a self-cleaning filter, and a multi-directional valve, solves the problems of limited cleaning methods and inconvenient filter maintenance in the comparative documents, achieving a highly efficient, automated, and low-maintenance backwashing function.

[0021] An inlet valve 21 is fixedly installed on the outside of the cooling water inlet pipe 2.

[0022] A first control valve 31 is fixedly installed on one side of the pipe 3, and a pump body 32 is fixedly installed on the other side of the pipe 3.

[0023] The dosing assembly 4 includes a dosing chamber 41, with slots 412 on both sides of the dosing chamber 41, which are engaged with the middle of the dosing pipe 3 via the slots 412.

[0024] The dosing assembly 4 also includes a dosing channel 411, which is fixedly connected to the outside of the dosing chamber 41 and is connected to the inside of the dosing chamber 41.

[0025] The dosing assembly 4 also includes a filter plate 42, which is fixedly connected to the inside of the dosing chamber 41.

[0026] The dosing assembly 4 also includes an inner rotating sleeve 43, one side of which is rotatably connected to a ball bearing 432. The inner rotating sleeve 43 is rotatably connected to the inside of the dosing chamber 41 via the ball bearing 432. The dosing assembly 4 also includes a shaft column 44, which is fixedly connected to the middle of the inner rotating sleeve 43. The dosing assembly 4 also includes a brush rod 441, which consists of three sets and is fixedly connected to the outside of the shaft column 44 in a ring. The brush rod 441 is in contact with the filter screen plate 42. The dosing assembly 4 also includes a baffle plate 431, which is fixedly connected to the outside of the inner rotating sleeve 43 in a ring. The baffle plate 431 corresponds to the position of the drug inlet channel 411.

[0027] An outlet valve 51 is fixedly installed on the middle of the outer side of the cooling water outlet pipe 5.

[0028] A first branch pipe 331 is provided on one side of the added pipe 3. One end of the first branch pipe 331 is fixedly connected to the added pipe 3, and the other end of the first branch pipe 331 is fixedly connected to the cooling water outlet pipe 5. A second branch pipe 332 is provided on the other side of the added pipe 3. One end of the second branch pipe 332 is fixedly connected to the added pipe 3, and the other end of the second branch pipe 332 is fixedly connected to the cooling water outlet pipe 5. A three-way ball valve 33 is fixedly connected at the connection between the added pipe 3, the first branch pipe 331, and the second branch pipe 332. By designing the first branch pipe 331 and the second branch pipe 332 through the three-way ball valve 33, the flushing path can be flexibly switched to circulate flushing or discharge to the tower pool 6, and cleaning and chemical recovery can be completed without disassembling the equipment. The folding plate 431 is linked to the flow of the medicine, driving the brush rod 441 to rotate, thereby achieving self-cleaning of the filter screen and enhancing the mixing effect of the medicine. The cooling water outlet pipe 5 is equipped with a tower pool 6 at the end away from the heat exchanger body 1.

[0029] The working principle and usage process of this utility model are as follows: When heat exchanger body 1 is used for heat exchange process; The first control valve 31 and the three-way ball valve 33 can be closed, and the inlet valve 21 and the outlet valve 51 can be started. At this time, the medium will pass through the cooling water inlet pipe 2, the heat exchanger body 1 and the cooling water outlet pipe 5 in sequence to complete the heat exchange process. When backflushing of heat exchanger body 1 is required; The inlet valve 21 and outlet valve 51 can be closed, and cleaning solution can be added to the dosing chamber 41 through the dosing channel 411. At this time, the pump body 32 is started, so that the solution in the dosing chamber 41 enters the three-way ball valve 33 through the dosing pipe 3 and the pump body 32. The three-way ball valve 33 is started to connect the dosing pipe 3 with the first branch pipe 331. At this time, the solution enters the first branch pipe 331 through the dosing pipe 3 and the three-way ball valve 33. Then, the solution enters the cooling water outlet pipe 5 from the first branch pipe 331 and enters the heat exchanger body 1 through the cooling water outlet pipe 5. After cleaning in the heat exchanger body 1, the solution enters the cooling water inlet pipe 2 and finally flows back to the dosing pipe 3. The above steps complete the backwashing operation of the solution circulating through the dosing pipe 3 and the heat exchanger body 1. In particular, as the medicine is continuously injected through the medicine inlet channel 411, it will come into contact with the baffle plate 431, which will drive the inner rotating sleeve 43 to rotate inside the medicine dosing chamber 41. At this time, the shaft column 44 and the brush rod 441 fixed at the inner rotating sleeve 43 will rotate synchronously and continuously clean the filter screen plate 42. This design can prevent impurities from accumulating on the filter screen plate 42. When the backwashing of the heat exchanger body 1 is completed, the three-way ball valve 33 is activated to connect the three-way ball valve 33 to the second branch pipe 332. At this time, the circulating medicine flows into the cooling water outlet pipe 5 through the second branch pipe 332 and is finally returned to the tower pool 6 through the cooling water outlet pipe 5.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat exchanger backflushing device, comprising a heat exchanger body (1), characterized in that, The heat exchanger body (1) is fixedly connected to a cooling water inlet pipe (2) and a cooling water outlet pipe (5) at its inlet and outlet, respectively. An auxiliary pipe (3) is provided on the outside of the heat exchanger body (1). The two ends of the auxiliary pipe (3) are connected to the cooling water inlet pipe (2) and the cooling water outlet pipe (5), respectively. A dosing component (4) is also provided on the outside of the auxiliary pipe (3) to cooperate with the auxiliary pipe (3) to achieve backwashing of the heat exchanger body (1).

2. The heat exchanger backflushing device according to claim 1, characterized in that, An inlet valve (21) is fixedly installed on the outside of the cooling water inlet pipe (2).

3. The heat exchanger backflushing device according to claim 2, characterized in that, A first control valve (31) is fixedly installed on one side of the added pipe (3), and a pump body (32) is fixedly installed on the other side of the added pipe (3).

4. The heat exchanger backflushing device according to claim 1, characterized in that, The dosing assembly (4) includes a dosing chamber (41), and slots (412) are provided on both sides of the dosing chamber (41). The dosing chamber (41) is engaged with the middle part of the dosing pipe (3) through the slots (412).

5. The heat exchanger backflushing device according to claim 4, characterized in that, The dosing assembly (4) also includes a dosing channel (411), which is fixedly connected to the outside of the dosing chamber (41) and is connected to the inside of the dosing chamber (41).

6. The heat exchanger backflushing device according to claim 4, characterized in that, The dosing assembly (4) also includes a filter plate (42), which is fixedly connected to the inside of the dosing chamber (41).

7. The heat exchanger backflushing device according to claim 1, characterized in that, The dosing assembly (4) also includes an inner rotating sleeve (43), one side of which is rotatably connected to a ball bearing (432). The inner rotating sleeve (43) is rotatably connected to the inside of the dosing chamber (41) via the ball bearing (432). The dosing assembly (4) also includes a shaft column (44), which is fixedly connected to the middle of the inner rotating sleeve (43). The dosing assembly (4) also includes a brush rod (441), which consists of three sets and is fixedly connected to the outside of the shaft column (44) in a ring. The brush rod (441) is in contact with the filter screen plate (42). The dosing assembly (4) also includes a folding plate (431), which is fixedly connected to the outside of the inner rotating sleeve (43) in a ring. The folding plate (431) corresponds to the position of the drug inlet channel (411).

8. The heat exchanger backflushing device according to claim 1, characterized in that, An outlet valve (51) is fixedly installed on the middle of the outer side of the cooling water outlet pipe (5).

9. The heat exchanger backflushing device according to claim 1, characterized in that, A first branch pipe (331) is provided on one side of the added pipe (3). One end of the first branch pipe (331) is fixedly connected to the added pipe (3), and the other end of the first branch pipe (331) is fixedly connected to the cooling water outlet pipe (5). A second branch pipe (332) is provided on the other side of the added pipe (3). One end of the second branch pipe (332) is fixedly connected to the added pipe (3), and the other end of the second branch pipe (332) is fixedly connected to the cooling water outlet pipe (5). A three-way ball valve (33) is fixedly connected at the connection between the added pipe (3), the first branch pipe (331), and the second branch pipe (332).

10. The heat exchanger backflushing device according to claim 1, characterized in that, The cooling water outlet pipe (5) is equipped with a tower pool (6) at the end away from the heat exchanger body (1).

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