Plate heat exchanger cleaning device and heat exchange system

Abstract

The utility model relates to the technical field of heat exchanger cleaning, in particular to a plate heat exchanger cleaning device and a heat exchange system. The plate heat exchanger cleaning device comprises a sealing nozzle and a sealing plate, the sealing nozzle blocks an inlet of the plate heat exchanger, and the sealing plate blocks an outlet of the plate heat exchanger. At least one partition plate is arranged in the sealing nozzle, a flushing channel is formed between the partition plate and the inner wall of the sealing nozzle, and each flushing channel is connected with a first cleaning pipe; the high point and the low point of the sealing plate are each provided with a first valve, and the first valves are connected with a first blow-off pipe. Two or more flushing channels are formed in the sealing nozzle, the plate heat exchanger can be cleaned through the channels during flushing, water resources are saved, flushing water pressure is guaranteed, flushing is more in place, and the flushing effect is better. After water is injected into the plate heat exchanger, the first valve at the bottom can be closed firstly, and a channel in the plate heat exchanger is soaked by the water, so that the cleaning effect is better improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger cleaning, in particular to a plate heat exchanger cleaning device and a heat exchange system. Background Art

[0002] A plate heat exchanger is a highly efficient heat exchanger formed by stacking a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat exchange is carried out through the plates.

[0003] A plate heat exchanger is used in the propane dehydrogenation to propylene process. Due to the internal structure of the plate heat exchanger in the propane dehydrogenation to propylene process being multi-channel (i.e., one inlet and multiple outlets) and the gap between the plates being small, and the heat insulation cotton and catalyst in the plate heat exchanger having strong adhesion, the cleaning of the inside of this plate heat exchanger is difficult.

[0004] Some plate heat exchangers on the market use high-pressure water for cleaning. However, the ordinary high-pressure water flushing method flushes multiple channels simultaneously and cannot clean the channels separately, requiring a large amount of water and being energy-consuming. In addition, since the internal channels of the heat exchanger are not linearly sealed and the channels are long, the pressure of the high-pressure water is small in the second half, so it cannot be flushed in place and the flushing effect is poor.

[0005] For example, the plate heat exchanger cleaning device disclosed in Chinese Patent Application No.: CN202121712691.X flushes all the channels inside the plate heat exchanger by means of water flushing, which requires a large amount of water resources. The pressure of the high-pressure water is small in the second half, so it cannot be flushed in place and the flushing effect is poor.

[0006] Another example is a plate heat exchanger cleaning device disclosed in Chinese Patent Application No.: CN202121493242.0, which also flushes all the channels inside the plate heat exchanger by means of water flushing, requiring a large amount of water resources. The pressure of the high-pressure water is small in the second half, so there is a problem that it cannot be flushed in place and the flushing effect is poor. Summary of the Utility Model

[0007] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a plate heat exchanger cleaning device that cleans the plate heat exchanger channel by channel, not only saving water resources but also having a good cleaning effect, thereby overcoming the deficiencies of the existing technology.

[0008] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0009] The present application provides a plate heat exchanger cleaning device, including a sealing nozzle and a sealing plate. The sealing nozzle plugs the inlet of the plate heat exchanger, and the sealing plate plugs the outlet of the plate heat exchanger;

[0010] Inside the sealing nozzle, there is at least one partition plate. A flushing channel is formed between the partition plate and the inner wall of the sealing nozzle. Each flushing channel is connected to a first cleaning pipe.

[0011] First valves are provided at both the high point and the low point of the sealing plate. The first valves are connected to a first sewage discharge pipe.

[0012] Preferably, the sealing nozzle is arranged on the first XY sliding module, and the sealing plate is arranged on the second XY sliding module.

[0013] Preferably, the sealing nozzle is long and flat and has the same height as the plate heat exchanger.

[0014] Preferably, a second valve is provided on the first cleaning pipe. The first cleaning pipe is connected to a cleaning pool through a first pipeline. A circulation pump, a third valve, and a fourth valve are provided on the first pipeline. Among them, the third valve is located on the input side of the circulation pump, and the fourth valve is located on the output side of the circulation pump.

[0015] Preferably, a return pipe is further connected to the first pipeline. The return pipe is connected to the cleaning pool, and a fifth valve is provided on the return pipe.

[0016] Preferably, a second sewage discharge pipe is provided at the bottom of the cleaning pool, and a sixth valve is provided on the second sewage discharge pipe.

[0017] Preferably, the first sewage discharge pipe is connected to the cleaning pool through a second pipeline.

[0018] Preferably, a first sealing ring is arranged inside the sealing nozzle. The first sealing ring can be pressed against the plate heat exchanger. A first fastener fixes the sealing nozzle on the input side of the plate heat exchanger. A second sealing ring is arranged on the inner side of the sealing plate. The second sealing ring can be pressed against the plate heat exchanger. A second fastener fixes the sealing nozzle on the output side of the plate heat exchanger.

[0019] Preferably, there are two or one partition plates, and the partition plates are arranged at equal intervals inside the sealing nozzle.

[0020] This application provides a heat exchange system, including the plate heat exchanger cleaning device, a flue, and a plate heat exchanger. The plate heat exchanger is arranged in the flue, and the plate heat exchanger cleaning device is arranged beside the plate heat exchanger.

[0021] The utility model has obvious advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, the sealing nozzle can block the inlet of the plate heat exchanger, and the sealing plate can block the outlet of the plate heat exchanger. A flushing channel is formed between the partition plate and the inner wall of the sealing nozzle. There are two or more flushing channels, so that the plate heat exchanger can be cleaned in separate channels, which can save water resources. At the same time, it ensures that the pressure of the high-pressure water still meets the flushing requirements in the second half section, ensuring that the flushing is in place and the flushing effect is better.

[0022] Meanwhile, after water is injected into the plate heat exchanger, the first valve at the bottom can be closed first, so that the water can stay inside the plate heat exchanger, soak the channels inside the plate heat exchanger, and dissolve the impurities inside the plate heat exchanger, which is more conducive to improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the cleaning process of the first embodiment of the utility model.

[0024] Figure 2 is a schematic diagram of the layout of the plate heat exchanger in the second embodiment of the utility model.

[0025] DESCRIPTION OF THE REFERENCE NUMERALS:

[0026] 10. Sealing nozzle; 11. First XY sliding module; 12. First cleaning pipe; 13. Second valve; 14. First pipeline; 15. Circulation pump; 16. Third valve; 17. Fourth valve; 20. Cleaning pool; 21. Second sewage pipe; 22. Sixth valve; 23. Return pipe; 24. Fifth valve; 25. Pressure gauge; 30. Sealing plate; 31. First valve; 32. First sewage pipe; 33. Second pipeline; 34. Second XY sliding module; 40. Plate heat exchanger; 41. Flue. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to further elaborate on the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the following combines the drawings and preferred embodiments to describe in detail the specific embodiments, structures, features and effects according to the utility model.

[0028] Embodiment 1

[0029] Please refer to Figure 1 as shown, which shows the specific structure of the preferred embodiment of the utility model, and is a plate heat exchanger cleaning device.

[0030] Among them, the sealing nozzle 10 can block the inlet of the plate heat exchanger 40, and the sealing plate 30 can block the outlet of the plate heat exchanger 40. The sealing nozzle 10 can clean the channels inside the plate heat exchanger 40 in a channel-by-channel manner, not only saving water resources, but also ensuring that the pressure of the high-pressure water still meets the flushing requirements in the second half, resulting in a better flushing effect.

[0031] After water is injected into the plate heat exchanger 40, the first valve 31 at the bottom can be closed first, so that the water can stay inside the plate heat exchanger 40 to soak the channels and dissolve the impurities inside the plate heat exchanger 40, which is more conducive to improving the cleaning effect.

[0032] This application provides a plate heat exchanger cleaning device, including a sealing nozzle 10 and a sealing plate 30. The sealing nozzle 10 blocks the inlet of the plate heat exchanger 40, and the sealing plate 30 blocks the outlet of the plate heat exchanger 40; at least one partition is provided inside the sealing nozzle 10, and a flushing channel is formed between the partition and the inner wall of the sealing nozzle 10. Each flushing channel is connected to a first cleaning pipe 12; first valves 31 are provided at both the high point and the low point of the sealing plate 30, and the first valves 31 are connected to a first sewage discharge pipe 32. The sealing nozzle 10 and the sealing plate 30 are preferably made of stainless steel and have high strength. In this embodiment, the sealing nozzle 10 is long and flat and has the same height as the plate heat exchanger 40. The sealing nozzle 10 can completely seal and cover the input side of the plate heat exchanger 40, and the sealing plate 30 can completely seal and block the output side of the plate heat exchanger 40. The sewage after cleaning is discharged from the first sewage discharge pipe 32. The partition divides the inside of the sealing nozzle 10 into multiple flushing channels, and each flushing channel corresponds to one or more channels of the plate heat exchanger 40. This way of dividing the sealing nozzle into multiple flushing channels can clean one or more channels inside the plate heat exchanger 40 at a time. This design is beneficial to ensuring the water pressure in the middle and later stages, and at the same time, channel-by-channel cleaning can save water and is more environmentally friendly. During cleaning, the first valve 31 at the high end is closed first, and then water is injected into the plate heat exchanger 40. After the water completely soaks the internal channels of the plate heat exchanger 40, the first valve 31 is opened in stages, which can better ensure the cleaning quality. The sealing plate 30 can be one or multiple pieces assembled together.

[0033] Preferably, the cross-section of the sealing nozzle 10 is conical, with a wider inlet to facilitate the entry of a large flow of water. The width of the outlet is the same as the width of a single channel of the plate heat exchanger, and the length is the same as the height of the module inlet, which is convenient for sealing and the entry of a large flow of water into the plate heat exchanger.

[0034] Preferably, the sealing nozzle 10 is arranged on the first XY sliding module 11, and the sealing plate 30 is arranged on the second XY sliding module 34. The first XY sliding module 11 and the second XY sliding module 34 are mechanisms in which a slide rail and a slider cooperate with each other. The sealing nozzle 10 is arranged on the first XY sliding module 11, and the sealing nozzle 10 can move in the XY direction. The sealing plate 30 is arranged on the second XY sliding module 34, and the sealing plate 30 can move in the XY direction. This design facilitates the worker to move the sealing nozzle 10 and the sealing plate 30. The sealing nozzle 10 is arranged on the first XY sliding module 11 through a first mounting bracket. The sealing plate 30 is arranged on the second XY sliding module 34 through a second mounting bracket. The XY sliding module is a multi-axis linear module, also known as a Cartesian robot or an XY cross slide module, and is widely used in high-precision industries such as laser cutting, laser marking, wafer inspection, high-speed pick-and-place, and semiconductor die bonding. This module realizes the movement of the XY (front, back, left, and right) axes through a synchronous belt slide module, has the characteristics of high precision and high efficiency, and can meet various complex working requirements.

[0035] Preferably, a second valve 13 is arranged on the first cleaning pipe 12; the first cleaning pipe 12 is connected to the cleaning pool 20 through a first pipeline 14, and a circulation pump 15, a third valve 16, and a fourth valve 17 are arranged on the first pipeline 14; wherein, the third valve 16 is located on the input side of the circulation pump 15, and the fourth valve 17 is located on the output side of the circulation pump 15. The second valve 13 can be used to control the opening or closing of the first cleaning pipe 12, so the first cleaning pipe 12 can be selectively opened or closed. The circulation pump 15 is used to transport the water in the cleaning pool 20 to the first cleaning pipe 12, and the first cleaning pipe 12 flushes high-pressure water into the channels inside the plate heat exchanger 40. The third valve 16 and the fourth valve 17 can play a control role, facilitating workers' maintenance, switching, etc. The cleaning pool 20 can play roles such as sedimentation and filtration.

[0036] Preferably, a return pipe 23 is further connected to the first pipeline 14, the return pipe 23 is connected to the cleaning pool 20, and a fifth valve 24 is arranged on the return pipe 23. The return pipe 23 is used to return water to the cleaning pool 20. The fifth valve 24 can play a role in closing or opening. When the fifth valve 24 is closed, the first cleaning pipe 12 can obtain a greater water pressure. A pressure gauge 25 is arranged on the return pipe 23, so that the water pressure can be monitored to facilitate the control of the output water pressure of the circulation pump 15.

[0037] Preferably, a second sewage pipe 21 is further arranged at the bottom of the cleaning pool 20, and a sixth valve 22 is arranged on the second sewage pipe 21. When the cleaning pool 20 needs to be cleaned, the sixth valve 22 is opened, and the sewage in the cleaning pool 20 can be discharged from the second sewage pipe 21 very conveniently.

[0038] Preferably, the first sewage pipe 32 is connected to the cleaning pool 20 through a second pipe 33. The water coming out of the first sewage pipe 32 can be recycled to the cleaning pool 20 for reuse, and this design can save more water resources. A filter screen is arranged in the cleaning pool 20, and the filter screen can filter impurities and increase the number of times of water recycling.

[0039] Preferably, a first sealing ring is arranged inside the sealing nozzle 10, and the first sealing ring can be pressed against the plate heat exchanger 40. The first fastener fixes the sealing nozzle 10 on the input side of the plate heat exchanger 40. A second sealing ring is arranged on the inner side of the sealing plate 30, and the second sealing ring can be pressed against the plate heat exchanger 40. The second fastener fixes the sealing nozzle 10 on the output side of the plate heat exchanger 40. The first fastener and the second fastener can be bolts, quick clamps, etc. The cooperation between the sealing nozzle 10 and the first sealing ring can ensure the sealing between the sealing nozzle 10 and the plate heat exchanger 40 and prevent water leakage. The cooperation between the sealing plate 30 and the second sealing ring can ensure the sealing between the sealing plate 30 and the plate heat exchanger 40 and prevent water leakage.

[0040] Preferably, there are two or one partition plates, and the partition plates are arranged at equal intervals inside the sealing nozzle 10. There can also be multiple partition plates, and the specific number is not limited. The partition plates and the inner wall of the sealing nozzle 10 can be assembled together by welding or clamping.

[0041] Through the special flushing device for the plate heat exchanger 40, the blockage problem of the plate heat exchanger 40 in the chemical production device can be effectively solved, the work done by the upstream compressor can be reduced, the energy consumption can be lowered, and the unplanned shutdown of the device can be reduced, greatly improving the safety and economy of the device operation.

[0042] The cleaning steps are as follows: 1. The circulating pump 15 pumps the water in the cleaning pool 20, and the water is sent from the first cleaning pipe 12 to the sealing nozzle 10. 2. The sealing nozzle 10 injects the water into the internal channel of the plate heat exchanger 40. 3. Close the first valve 31 at the bottom so that the water can completely soak the internal channel of the plate heat exchanger 40. 4. The sealing nozzle 10 first flushes the upper channel of the plate radiator, and then flushes the lower channel of the plate heat exchanger 40. 5. The sewage after flushing is rinsed back to the cleaning pool 20 for recycling.

[0043] Embodiment 2

[0044] Please refer to Figure 2 As shown, the present application provides a heat exchange system, including the plate heat exchanger cleaning device, a flue 41, and a plate heat exchanger 40; the plate heat exchanger 40 is arranged in the flue, and the plate heat exchanger cleaning device is arranged beside the plate heat exchanger 40.

[0045] In summary, the design focus of the present utility model lies in that its sealing nozzle 10 and sealing plate 30 block the plate heat exchanger 40. A number of flushing channels are formed inside the sealing nozzle 10. When flushing, the plate heat exchanger 40 is cleaned in sub-channels, which not only saves water resources, but also ensures that the pressure of the high-pressure water still meets the flushing requirements in the second half, and the flushing effect is better. After water is injected into the plate heat exchanger 40, the first valve 31 at the bottom can be closed first, so that the water fully soaks the channels inside the plate heat exchanger 40 and dissolves the impurities inside the plate heat exchanger 40, which is more conducive to improving the cleaning effect.

[0046] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A plate heat exchanger cleaning device, characterized in that: It includes a sealing nozzle and a sealing plate. The sealing nozzle plugs the inlet of the plate heat exchanger, and the sealing plate plugs the outlet of the plate heat exchanger; At least one partition plate is arranged inside the sealing nozzle. A flushing channel is formed between the partition plate and the inner wall of the sealing nozzle, and each flushing channel is connected with a first cleaning pipe; First valves are arranged at both the high point and the low point of the sealing plate, and the first valves are connected with first sewage discharge pipes.

2. The plate heat exchanger cleaning device according to claim 1, wherein: The sealing nozzle is arranged on the first XY sliding module, and the sealing plate is arranged on the second XY sliding module.

3. The plate heat exchanger cleaning device according to claim 1 or 2, characterized in that: The sealing nozzle is long and flat and has the same height as the plate heat exchanger.

4. A plate heat exchanger cleaning device according to claim 1, characterized in that: A second valve is arranged on the first cleaning pipe; the first cleaning pipe is connected with a cleaning pool through a first pipeline, and a circulation pump, a third valve and a fourth valve are arranged on the first pipeline; wherein, the third valve is located on the input side of the circulation pump, and the fourth valve is located on the output side of the circulation pump.

5. A plate heat exchanger cleaning device according to claim 4, characterized in that: A return pipe is further connected to the first pipeline, the return pipe is connected with the cleaning pool, and a fifth valve is arranged on the return pipe.

6. The cleaning device for a plate heat exchanger according to claim 4, characterized in that: A second sewage discharge pipe is arranged at the bottom of the cleaning pool, and a sixth valve is arranged on the second sewage discharge pipe.

7. A plate heat exchanger cleaning device according to any one of claims 4-6, characterized in that: The first sewage discharge pipe is connected with the cleaning pool through a second pipeline.

8. A plate heat exchanger cleaning device according to claim 1, characterized in that: A first sealing ring is arranged inside the sealing nozzle, and the first sealing ring can be pressed against the plate heat exchanger. A first fastener fixes the sealing nozzle on the input side of the plate heat exchanger. A second sealing ring is arranged inside the sealing plate, and the second sealing ring can be pressed against the plate heat exchanger. A second fastener fixes the sealing nozzle on the output side of the plate heat exchanger.

9. A plate heat exchanger cleaning device according to claim 1 or 8, characterized in that: There are two or one partition plates, and the partition plates are arranged at equal intervals inside the sealing nozzle.

10. A heat exchange system, characterized in that: It includes the plate heat exchanger cleaning device, the flue and the plate heat exchanger according to any one of claims 1-9; the plate heat exchanger is arranged in the flue, and the plate heat exchanger cleaning device is arranged beside the plate heat exchanger.

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