Online cleaning device for heat exchanger

Abstract

The utility model belongs to the technical field of heat exchanger cleaning, and discloses a heat exchanger on-line cleaning device which comprises a circulating pump, a sewage discharge groove, a ball valve a, a pipeline I, a pipeline II and a pipeline III, the ball valve a is arranged on the pipeline III, and the two ends of the pipeline III are connected with a water inlet of the circulating pump and a water outlet of the sewage discharge groove respectively. Two ends of the pipeline I are respectively connected with a water outlet of the circulating pump and a cooling water inlet pipeline, two ends of the pipeline II are respectively connected with a water inlet of the sewage discharge groove and a cooling water outlet pipeline, and the sewage discharge groove is provided with a descaling agent feeding port. The single heat exchanger can be cleaned on line, the time for cleaning the single heat exchanger is short, and the efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchanger cleaning and relates to an online cleaning device for a heat exchanger. Background Art

[0002] Heat exchangers are widely used in industrial production. They are mainly used to achieve heat transfer between different fluids to achieve process requirements such as heating, cooling or condensation. However, as the heat exchanger runs for a long time, a dirt layer will form in the heat exchanger, which will not only increase the fluid resistance in the heat exchanger, but also reduce the overall heat transfer coefficient. The accumulation of dirt will even cause local overheating, resulting in a decrease in mechanical properties, local corrosion and even perforation, which seriously threatens the safe operation of the equipment. Therefore, it is necessary to clean the heat exchanger regularly to remove the dirt layer to ensure the normal operation of the heat exchanger and meet the temperature control requirements in the industrial production process.

[0003] In order to solve the above problems, the existing technology for cleaning heat exchangers mainly includes physical cleaning and chemical cleaning. The physical cleaning method is mostly used on plate heat exchangers. It is necessary to disassemble the heat exchanger first, then rinse it with a high-pressure water gun, and then install it back to the original pipeline after cleaning. Although the cleaning effect is significant, it requires multiple disassembly and installation, which not only increases the labor burden, but also easily damages the heat exchanger gasket, reduces the service life of the heat exchanger, and increases the maintenance cost. At the same time, there is also the possibility of leakage of the heat exchanger due to improper assembly during the manual reinstallation process, which poses a safety hazard. There are other problems with the physical cleaning method. For example, it can only target the inner wall of the tube bundle or the heat exchanger pipe, while the connecting part of the heat exchanger (the pipeline between the inlet and outlet butterfly valves and the heat exchanger) is not processed, which will also affect the heat exchange effect of the heat exchanger.

[0004] Chemical cleaning is an online cleaning method, and U-tube heat exchangers are more likely to use this cleaning method. Current chemical cleaning usually involves adding chemicals to the cooling water main pipe, and cleaning the heat exchanger by circulating the chemicals in the pipeline. This cleaning method requires chemicals to circulate in the entire cooling water pipeline, so not only is the cleaning cycle long and the cleaning effect average, but it is also impossible to clean a specific heat exchanger individually.

[0005] Therefore, it is of great significance to develop a new heat exchanger cleaning equipment to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the problems existing in the prior art and provide an online cleaning device for a heat exchanger.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A heat exchanger online cleaning device, the heat exchanger is connected with a cooling water inlet pipeline and a cooling water outlet pipeline, a butterfly valve a is arranged on the cooling water inlet pipeline, a butterfly valve b is arranged on the cooling water outlet pipeline, and the heat exchanger online cleaning device comprises a cleaning device;

[0009] The cleaning equipment includes a circulation pump, a drain tank, a ball valve a, pipeline I, pipeline II and pipeline III;

[0010] Ball valve a is set on pipeline III;

[0011] The two ends of pipeline III are connected to the water inlet of the circulation pump and the water outlet of the sewage tank respectively;

[0012] One end of pipeline I is connected to the water outlet of the circulating pump, and the other end is used to connect to the cooling water inlet pipeline. The connection point between pipeline I and the cooling water inlet pipeline is located on the cooling water inlet pipeline between the butterfly valve a and the heat exchanger;

[0013] One end of pipeline II is connected to the water inlet of the sewage tank, and the other end is used to connect to the cooling water outlet pipeline. The connection point between pipeline II and the cooling water outlet pipeline is located on the cooling water outlet pipeline between the butterfly valve b and the heat exchanger;

[0014] A descaling agent feeding port is arranged on the sewage trough.

[0015] As the preferred technical solution:

[0016] As described above, the online cleaning device for a heat exchanger further comprises a ball valve b and a ball valve c arranged on the pipeline I;

[0017] Ball valve b is located at the end away from the circulation pump, and ball valve c is located at the end close to the circulation pump. Ball valve c is set to conveniently and safely control the flow, and also to cope with different heat exchangers for consideration of the working environment and convenient storage.

[0018] As described above, the online cleaning device for a heat exchanger further comprises a ball valve d and a ball valve e arranged on pipeline II;

[0019] Ball valve d is located at the end away from the drain tank, and ball valve e is located at the end close to the drain tank. Ball valve e is set for working environment and convenient storage considerations to cope with different heat exchangers.

[0020] The above-mentioned online cleaning device for a heat exchanger, wherein the cleaning device further comprises a sewage discharge pipeline and a valve arranged on the sewage discharge pipeline;

[0021] The sewage pipeline is connected to the bottom of the sewage tank.

[0022] In the above-mentioned online cleaning device for a heat exchanger, a filter screen is arranged inside the sewage tank.

[0023] In the above-mentioned online cleaning device for a heat exchanger, a flange cover is arranged on the upper surface of the sewage tank, and a descaling agent feeding port is arranged on the flange cover.

[0024] The heat exchanger online cleaning device as described above further comprises a mobile platform arranged below the cleaning device;

[0025] The mobile platform includes a horizontal support plate and a handle;

[0026] The horizontal support plate is a rectangular plate;

[0027] A universal wheel is arranged at each of the four corners of the bottom surface of the horizontal support plate;

[0028] The handle is detachably connected to one side of the upper surface of the horizontal support plate.

[0029] Beneficial effects:

[0030] The utility model can achieve the purpose of online cleaning of a single heat exchanger, and the time for cleaning a single heat exchanger is short and the cleaning efficiency is high. At the same time, the connecting part of the heat exchanger can be cleaned, and the cleaning effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the connection between a cleaning device and a heat exchanger of an online cleaning device for a heat exchanger of the utility model;

[0032] Figure 2 A schematic diagram showing the position of a cleaning device and a moving platform of an online cleaning device for a heat exchanger according to the utility model;

[0033] Among them, 1-circulation pump, 2-ball valve a, 3-drain tank, 4-ball valve e, 5-pipeline I, 6-ball valve b, 7-ball valve d, 8-pipeline II, 9-valve, 10-butterfly valve a, 11-butterfly valve b, 12-ball valve c, 13-horizontal support plate, 14-handle, 15-pipeline III, 16-heat exchanger. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0035] A heat exchanger (such as Figure 1As shown, the heat exchanger 16 is connected to a cooling water inlet pipeline and a cooling water outlet pipeline, a butterfly valve a 10 is provided on the cooling water inlet pipeline, and a butterfly valve b 11 is provided on the cooling water outlet pipeline) an online cleaning device, including a cleaning device and a mobile platform;

[0036] like Figure 1 As shown, the cleaning equipment includes a circulation pump 1, a sewage tank 3, a ball valve a 2, a pipeline III 15, a pipeline I 5, a ball valve c12, a ball valve b 6, a ball valve d 7, a pipeline II 8, a ball valve e 4, a sewage pipeline and a valve 9;

[0037] Both ends of pipeline III 15 are connected to the water inlet of the circulation pump 1 and the water outlet of the sewage tank 3 respectively, and a ball valve a 2 is provided on pipeline III 15;

[0038] One end of the pipeline 15 is connected to the water outlet of the circulation pump 1;

[0039] The ball valve b6 and the ball valve c12 are arranged on the pipeline I5, the ball valve b6 is located at the end far away from the circulation pump 1, and the ball valve c12 is located at the end close to the circulation pump 1;

[0040] One end of pipeline II 8 is connected to the water inlet of the sewage tank 3;

[0041] Ball valve d 7 and ball valve e 4 are arranged on pipeline II 8, ball valve d 7 is located at an end away from the sewage tank 3, and ball valve e 4 is located at an end close to the sewage tank 3;

[0042] The sewage pipeline is connected to the bottom of the sewage tank 3, and the valve 9 is arranged on the sewage pipeline;

[0043] The upper surface of the sewage tank 3 is provided with a flange cover plate, and a descaling agent feeding port is provided on the flange cover plate; a filter screen is provided inside the sewage tank 3;

[0044] like Figure 2 As shown, the mobile platform is arranged below the cleaning device and includes a horizontal support plate 13 and a handle 14;

[0045] The horizontal support plate 13 is a rectangular plate, and a universal wheel is disposed at each of the four corners of the bottom surface of the rectangular plate; one side of the upper surface of the horizontal support plate 13 is detachably connected to the handle 14 .

[0046] The use process of the above device is:

[0047] 1. Move the cleaning device to the side of the heat exchanger 16 to be cleaned, close all valves, and add an appropriate amount of prepared cleaning agent into the sewage tank 3 in advance;

[0048] 2. First, connect the other end of pipeline I 5 to the cooling water inlet pipeline between butterfly valve a 10 and heat exchanger 16, and then connect the other end of pipeline II 8 to the cooling water outlet pipeline between butterfly valve b 11 and heat exchanger 16;

[0049] 3. Open butterfly valve a 10, butterfly valve b 11, ball valve b 6 and ball valve d 7 to fill pipeline I 5 and pipeline II 8 with cooling water, open ball valve a 2 to fill pipeline III 15 with cleaning agent;

[0050] 4. Open ball valve c 12 and ball valve e 4, start circulation pump 1, and make the cleaning agent circulate continuously in the pipeline between the cleaning device and the heat exchanger 16;

[0051] 5. After cleaning, open the valve 9 on the sewage pipeline to discharge the sewage;

[0052] 6. Turn off the circulation pump 1, remove the other end of pipeline I 5 and the other end of pipeline II 8 from the cooling water inlet pipeline and the cooling water outlet pipeline to complete the cleaning.

Claims

1. A heat exchanger online cleaning device, characterized in that: The heat exchanger online cleaning device includes a cleaning device; The cleaning equipment includes a circulation pump (1), a sewage tank (3), a ball valve a (2), a pipeline I (5), a pipeline II (8) and a pipeline III (15); The ball valve a (2) is arranged on the pipeline III (15); The two ends of pipeline III (15) are respectively connected to the water inlet of the circulation pump (1) and the water outlet of the sewage tank (3); One end of the pipeline I (5) is connected to the water outlet of the circulation pump (1); One end of pipeline II (8) is connected to the water inlet of the sewage tank (3); The sewage trough (3) is provided with a descaling agent feeding port.

2. The heat exchanger online cleaning device according to claim 1, characterized in that: The cleaning device also includes a ball valve b (6) and a ball valve c (12) arranged on the pipeline I (5); The ball valve b (6) is located at the end away from the circulation pump (1), and the ball valve c (12) is located at the end close to the circulation pump (1).

3. The heat exchanger online cleaning device according to claim 1, characterized in that: The cleaning device also includes a ball valve d (7) and a ball valve e (4) arranged on pipeline II (8); The ball valve d (7) is located at an end away from the sewage trough (3), and the ball valve e (4) is located at an end close to the sewage trough (3).

4. The heat exchanger online cleaning device according to claim 1, characterized in that: The cleaning device also includes a sewage discharge pipeline and a valve (9) arranged on the sewage discharge pipeline; The sewage pipeline is connected to the bottom of the sewage tank (3).

5. The heat exchanger online cleaning device according to claim 1, characterized in that: A filter screen is arranged inside the sewage tank (3).

6. The heat exchanger online cleaning device according to claim 1, characterized in that: The upper surface of the sewage trough (3) is provided with a flange cover plate, and the descaling agent feeding port is arranged on the flange cover plate.

7. The heat exchanger online cleaning device according to claim 1, characterized in that: The heat exchanger online cleaning device also includes a mobile platform arranged below the cleaning device; The mobile platform comprises a horizontal support plate (13) and a handle (14); The horizontal support plate (13) is a rectangular plate; A universal wheel is disposed at each of the four corners of the bottom surface of the horizontal support plate (13); The handle (14) is detachably connected to one side of the upper surface of the horizontal support plate (13).

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