An on-line cleaning device for heat exchangers

Abstract

The utility model relates to heat exchanger cleaning technical field especially relates to a kind of heat exchanger online cleaning device. Heat exchanger online cleaning device includes water storage tank, the water storage tank one side is equipped with anticorrosive pump, the input end and output end of anticorrosive pump are respectively fixedly connected with water suction pipe and water delivery pipe, and the end of water suction pipe is located inside water storage tank, the end of water delivery pipe is connected with intermittent structure, and the end of intermittent structure is also connected with the connecting pipe that is communicated with the water inlet end of heat exchanger, the water storage tank inside is also connected with the backwater pipe that is communicated with the water outlet end of heat exchanger;The intermittent structure includes hollow tube. The utility model is through the intermittent interception of cleaning fluid in the flow guide cavity by the continuous rotation of special-shaped water interception column, makes the cleaning fluid that enters heat exchanger form pulse flow, effectively flushes the dirt, impurity etc. attached in heat exchanger inner wall, improves cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger cleaning technology, and in particular to an online heat exchanger cleaning device. Background Technology

[0002] In industrial production, heat exchangers, as key equipment for achieving heat exchange, are widely used in chemical, power, metallurgical and other fields. The internal pipes or heat exchange surfaces of heat exchangers are in long-term contact with the medium, and are prone to fouling due to water impurities, medium residues, chemical reactions and other factors. This fouling will significantly reduce the heat transfer efficiency of the heat exchanger, increase energy consumption, and may even lead to pipe blockage, equipment corrosion, shorten service life, and affect production stability and safety. Therefore, it is necessary to clean the inside of the heat exchanger to ensure its safe and stable long-term operation.

[0003] Traditional heat exchanger cleaning methods mainly include offline disassembly and cleaning and online simple rinsing. However, offline disassembly and cleaning requires stopping the equipment to disassemble, which is not only time-consuming and labor-intensive, affecting production progress, but may also cause additional damage to the equipment due to the disassembly and assembly process, and the cleaning cost is high. Therefore, online cleaning is often used to clean heat exchangers. A corresponding cleaning solution for removing dirt is prepared and circulated inside the heat exchanger to achieve the effect of chemically removing dirt. However, the cleaning solution generally flows through the heat exchanger at a uniform speed, which is insufficient to flush out stubborn dirt and makes it difficult to completely remove tightly attached impurities, resulting in poor cleaning effect.

[0004] Therefore, it is necessary to provide a new online heat exchanger cleaning device to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a new online heat exchanger cleaning device.

[0006] The online cleaning device for heat exchangers provided by this utility model includes: a water storage tank, an anti-corrosion pump installed on one side of the water storage tank, a suction pipe and a delivery pipe fixedly connected to the input end and output end of the anti-corrosion pump respectively, and the end of the suction pipe is located inside the water storage tank, the end of the delivery pipe is connected to an intermittent structure, and the end of the intermittent structure is also connected to a connecting pipe communicating with the water inlet end of the heat exchanger, and a return water pipe communicating with the water outlet end of the heat exchanger is also connected inside the water storage tank;

[0007] The intermittent structure includes a hollow tube, inside which is a flow guide cavity with two ends communicating with a water supply pipe and a connecting pipe, respectively. Inside the hollow tube is also an installation cavity communicating with the flow guide cavity, and an irregularly shaped water intercepting column is installed inside the installation cavity. A drive motor is fixedly installed at the upper end of the hollow tube, and a drive shaft fixedly connected to the output end of the drive motor is fixedly installed at the upper end of the irregularly shaped water intercepting column.

[0008] Preferably, the irregularly shaped water-cutting column is fitted with a clearance between it and the bottom wall of the guide cavity.

[0009] Preferably, a filter plate is installed inside the water storage tank, and the filter plate has multiple evenly distributed filter holes. The water suction pipe and the water return pipe are located at their respective ends inside the water storage tank on both sides of the filter plate.

[0010] Preferably, the inner wall of the water storage tank has two symmetrically distributed grooves, and the two ends of the filter plate are respectively inserted into the two grooves.

[0011] Preferably, a drain pipe communicating with the interior of the water storage tank is fixedly installed on the outer wall of the tank, and the drain pipe is located on the same side as the return water pipe. A manual valve for controlling its opening and closing is fixedly installed on the drain pipe.

[0012] Preferably, an air inlet pipe communicating with the interior of the water suction pipe is also fixedly installed on the water suction pipe, and an electric control valve is fixedly installed on both the air inlet pipe and the water suction pipe.

[0013] Preferably, the air intake pipe is vertically upward, and the upper opening of the air intake pipe is threaded with a dust cover.

[0014] Preferably, the ends of the water suction pipe and the water return pipe located inside the water storage tank are both fixedly installed with sleeves, and the outer wall of the sleeve is provided with a through hole, and a counterweight is fixedly installed at the bottom of the sleeve.

[0015] Compared with related technologies, the online heat exchanger cleaning device provided by this utility model has the following advantages:

[0016] This invention features an intermittent structure. As the cleaning fluid passes through this structure, the continuously rotating irregularly shaped water-blocking column intermittently intercepts the fluid flowing through the guide cavity, creating a pulsed flow of the cleaning fluid entering the heat exchanger. Compared to a continuous and stable water flow, the pulsed flow has a stronger impact on the inside of the heat exchanger, more effectively flushing away dirt and impurities adhering to the inner wall of the heat exchanger, improving the cleaning effect, and ensuring that the heat exchange efficiency of the heat exchanger is not affected by contaminants. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of the online heat exchanger cleaning device provided by this utility model;

[0018] Figure 2 for Figure 1 The diagram shows the structure of the water storage tank.

[0019] Figure 3 for Figure 1 The diagram shows the structure of the filter plate.

[0020] Figure 4 for Figure 1 A partial structural diagram of the return water pipe is shown.

[0021] Figure 5 for Figure 1 The diagram shows the structure of the intermittent structure.

[0022] Figure 6 for Figure 1 The diagram shows a half-section of the intermittent structure.

[0023] Numbered in the diagram: 1. Water storage tank; 11. Slide chute; 12. Sewage pipe; 13. Manual valve; 2. Corrosion-resistant pump; 21. Water supply pipe; 22. Suction pipe; 23. Air inlet pipe; 24. Electrically controlled valve; 3. Intermittent structure; 31. Hollow pipe; 311. Flow guide cavity; 312. Mounting cavity; 32. Irregularly shaped water intercepting column; 33. Drive motor; 34. Drive shaft; 4. Connecting pipe; 5. Return water pipe; 51. Sleeve; 511. Through hole; 52. Counterweight; 6. Filter plate; 61. Filter hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages 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.

[0025] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0026] Please see Figures 1 to 6 This utility model provides an online cleaning device for heat exchangers, which includes: a water storage tank 1, an anti-corrosion pump 2 installed on one side of the water storage tank 1, a suction pipe 22 and a delivery pipe 21 fixedly connected to the input and output ends of the anti-corrosion pump 2 respectively, and the end of the suction pipe 22 is located inside the water storage tank 1, the end of the delivery pipe 21 is connected to an intermittent structure 3, and the end of the intermittent structure 3 is also connected to a connecting pipe 4 communicating with the water inlet of the heat exchanger, and a return water pipe 5 communicating with the water outlet of the heat exchanger is also connected inside the water storage tank 1.

[0027] It should be noted that: the water storage tank 1 is used for the preparation and loading of the cleaning solution. The anti-corrosion pump 2 draws the cleaning solution from the inside of the water storage tank 1 through the suction pipe 22, and then transports the cleaning solution to the intermittent structure 3 through the water delivery pipe 21 for intermittent interception. After that, it is transported to the heat exchanger through the connecting pipe 4 for cleaning. Finally, the cleaning solution flows back into the water storage tank 1 through the return water pipe 5 for reuse.

[0028] A suitable tank cover can be installed on the water storage tank 1 to prevent the cleaning fluid from splashing out.

[0029] To ensure the normal operation of the heat exchanger and to avoid disassembling it during cleaning, valves can be installed on the connecting pipe 4, the return water pipe 5, and the original inlet and outlet water pipes of the heat exchanger. When the heat exchanger is in normal use, the connecting pipe 4 and the return water pipe 5 are closed by the valves, and the original inlet and outlet water pipes of the heat exchanger operate normally. When the heat exchanger needs to be cleaned, the original inlet and outlet water pipes of the heat exchanger are closed, and the connecting pipe 4 and the return water pipe 5 are opened to clean the inside of the heat exchanger.

[0030] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 To ensure the continuous reuse of the cleaning solution stored inside the water storage tank 1 and to prevent clogging caused by impurities in the cleaning solution used to flush the heat exchanger, a filter plate 6 is installed inside the water storage tank 1. The filter plate 6 has multiple evenly distributed filter holes 61. The suction pipe 22 and the return pipe 5 are located at opposite ends of the filter plate 6 inside the water storage tank 1. The filter plate 6 divides the inside of the water storage tank 1 into two passable parts. After the cleaning solution enters the water storage tank 1, the impurities are separated and placed on one side of the water storage tank 1 by the filter holes 61, ensuring that the cleaning solution sucked in by the suction pipe 22 is clean (containing a small amount of trace impurities or containing no impurities).

[0031] Furthermore, two symmetrically distributed grooves 11 are provided on the inner wall of the water storage tank 1, and the two ends of the filter plate 6 are respectively inserted into the two grooves 11; the grooves 11 provided inside the water storage tank 1 are used for the installation of the filter plate 6, and also facilitate the subsequent disassembly of the filter plate 6 for cleaning or replacement.

[0032] Furthermore, a drain pipe 12 connected to the interior of the water storage tank 1 is fixedly installed on the outer wall of the tank, and the drain pipe 12 is located on the same side as the return water pipe 5. A manual valve 13 is fixedly installed on the drain pipe 12 to control its opening and closing. The drain pipe 12 is used to quickly discharge the cleaning liquid containing a large amount of impurities after multiple uses inside the water storage tank 1. The manual valve 13 is used to control the opening and closing of the drain pipe 12. The drain pipe 12 is on the same side as the return water pipe 5, which means that it is mainly used to drain the impurities inside the water storage tank 1.

[0033] It is worth noting that an air inlet pipe 23 connected to the inside of the suction pipe 22 is also fixedly installed on the suction pipe 22, and an electric control valve 24 is fixedly installed on both the air inlet pipe 23 and the suction pipe 22. The electric control valve 24 controls the opening and closing of the air inlet pipe 23 and the suction pipe 22. The air inlet pipe 23 is mainly used to draw in air through the anti-corrosion pump 2 and the air inlet pipe 23 after the cleaning fluid has finished cleaning the inside of the heat exchanger, so as to blow out the residual cleaning fluid inside the heat exchanger.

[0034] The intake pipe 23 is vertically upward, and the upper end of the intake pipe 23 is threadedly connected to a dust cover (this is a technical means commonly used by those skilled in the art, and the dust cover is selected according to actual needs, so it is not shown in the figure); the vertically arranged intake pipe 23 can reduce the intake of dust, and the dust cover further protects against dust.

[0035] To prevent the suction pipe 22 and the return pipe 5 from slipping out of the water storage tank 1 during use, sleeves 51 are fixedly installed at the ends of the suction pipe 22 and the return pipe 5 inside the water storage tank 1. A through hole 511 is provided on the outer wall of the sleeve 51, and a counterweight 52 is fixedly installed at the bottom of the sleeve 51. The counterweight 52 provides weight to the ends of the suction pipe 22 and the return pipe 5, so that their ends are always located near the bottom of the water storage tank 1. The through hole 511 on the sleeve 51 is used for the passage of cleaning fluid.

[0036] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The intermittent structure 3 includes a hollow tube 31. Inside the hollow tube 31, there is a flow guide cavity 311 with both ends connected to the water supply pipe 21 and the connecting pipe 4 respectively. Inside the hollow tube 31, there is also an installation cavity 312 connected to the flow guide cavity 311. A special-shaped water intercepting column 32 is installed inside the installation cavity 312. A drive motor 33 is fixedly installed at the upper end of the hollow tube 31. A drive shaft 34 fixedly connected to the output end of the drive motor 33 is fixedly installed at the upper end of the special-shaped water intercepting column 32.

[0037] It should be noted that during the process of the cleaning fluid passing through the intermittent structure 3, the drive motor 33 controls the irregular water-blocking column 32 to rotate continuously through the drive shaft 34. Due to the special shape of the irregular water-blocking column 32, it will intermittently intercept the cleaning fluid in the guide cavity 311 during rotation. That is, when part of the irregular water-blocking column 32 enters the flow path of the guide cavity 311, it will reduce the passage space of the cleaning fluid in the guide cavity 311, and temporarily reduce the flow rate of the cleaning fluid. When this part of the irregular water-blocking column 32 moves to one side of the guide cavity 311, the passage space of the guide cavity 311 is restored, and the flow rate of the cleaning fluid is restored accordingly. This intermittent flow rate change allows the cleaning fluid entering the heat exchanger to form a pulsed flow. Compared with a continuous and stable water flow, the pulsed water flow has a stronger impact on the inside of the heat exchanger, which can more effectively flush away the dirt and impurities attached to the inner wall of the heat exchanger, improve the cleaning effect, and ensure that the heat exchange efficiency of the heat exchanger is not affected by pollutants.

[0038] The irregular water-blocking column 32 has an overall cylindrical structure with an arc-shaped groove in the cylinder. The bottom of the irregular water-blocking column 32 and the guide cavity 311 have a certain gap to ensure that the cleaning fluid can always pass through.

[0039] It is worth noting that the irregularly shaped water-blocking column 32 is fitted with the inner bottom wall of the guide cavity 311 with a clearance. The irregularly shaped water-blocking column 32 is used to intercept part of the cleaning fluid passing through the guide cavity 311. This ensures that the guide cavity 311 is always in a passable state no matter how the irregularly shaped water-blocking column 32 rotates, preventing the irregularly shaped water-blocking column 32 from being damaged and completely blocking the guide cavity 311, which would lead to damage to the pipeline pump body.

[0040] Among them, from Figure 6 As can be seen, the drive motor 33 is fixed to the hollow tube 31 by bolts and is detachable. Different cross-sectional shapes of the irregular water-cutting column 32 can be replaced according to the pipe diameter and scaling degree of different heat exchangers, thereby improving its applicability.

[0041] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An online cleaning device for heat exchangers, comprising a water storage tank (1), characterized in that: A corrosion-resistant pump (2) is installed on one side of the water storage tank (1). The input end and output end of the corrosion-resistant pump (2) are respectively fixedly connected to a suction pipe (22) and a delivery pipe (21). The end of the suction pipe (22) is located inside the water storage tank (1). The end of the delivery pipe (21) is connected to an intermittent structure (3). The end of the intermittent structure (3) is also connected to a connecting pipe (4) that communicates with the water inlet of the heat exchanger. The inside of the water storage tank (1) is also connected to a return water pipe (5) that communicates with the water outlet of the heat exchanger. The intermittent structure (3) includes a hollow tube (31). The hollow tube (31) has a flow guide cavity (311) with both ends connected to the water supply pipe (21) and the connecting pipe (4) respectively. The hollow tube (31) also has an installation cavity (312) connected to the flow guide cavity (311). A special-shaped water intercepting column (32) is installed inside the installation cavity (312). A drive motor (33) is fixedly installed at the upper end of the hollow tube (31). A drive shaft (34) fixedly connected to the output end of the drive motor (33) is fixedly installed at the upper end of the special-shaped water intercepting column (32).

2. The online heat exchanger cleaning device according to claim 1, characterized in that, The irregular water-cutting column (32) is fitted with the bottom wall of the guide cavity (311) with a gap.

3. The online heat exchanger cleaning device according to claim 1, characterized in that, The water storage tank (1) is equipped with a filter plate (6), and the filter plate (6) has a plurality of evenly distributed filter holes (61). The water suction pipe (22) and the water return pipe (5) are located at one end inside the water storage tank (1) on both sides of the filter plate (6).

4. The online heat exchanger cleaning device according to claim 3, characterized in that, The water storage tank (1) has two symmetrically distributed grooves (11) on its inner wall, and the filter plate (6) is inserted into the two grooves (11) at both ends.

5. The online heat exchanger cleaning device according to claim 3, characterized in that, The water storage tank (1) is fixedly installed with a drain pipe (12) that communicates with its interior. The drain pipe (12) is located on the same side as the return water pipe (5). A manual valve (13) for controlling its opening and closing is fixedly installed on the drain pipe (12).

6. The online heat exchanger cleaning device according to claim 1, characterized in that, An air inlet pipe (23) communicating with the interior of the water suction pipe (22) is also fixedly installed on the water suction pipe (22), and an electric control valve (24) is fixedly installed on both the air inlet pipe (23) and the water suction pipe (22).

7. The online heat exchanger cleaning device according to claim 6, characterized in that, The air intake pipe (23) is vertically upward, and the upper end of the air intake pipe (23) is threadedly connected to a dust cover.

8. The online heat exchanger cleaning device according to claim 1, characterized in that, The ends of the water suction pipe (22) and the water return pipe (5) located inside the water storage tank (1) are both fixedly installed with sleeves (51), and the outer wall of the sleeve (51) is provided with a through hole (511), and a counterweight (52) is fixedly installed at the bottom of the sleeve (51).

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