Online cleaning machine for heat exchanger

Abstract

The heat exchanger online cleaning machine comprises a rack, a cleaning mechanism is arranged on the upper surface of the rack, and a heat exchanger body is connected to one side of the cleaning mechanism; the cleaning mechanism comprises a liquid storage tank shell, a filtering module arranged in the liquid storage tank shell, a clear water bin arranged below the filtering module, a circulating pump arranged on the outer side wall of the liquid storage tank shell and three turbulent flow baffles arranged in the liquid storage tank shell. Through the arrangement of the cleaning mechanism, compared with the prior art, the device adopts the modularly designed cleaning mechanism to conveniently clean the heat exchanger body on line, and the heat exchanger body does not need to be disassembled for cleaning, so that the cleaning efficiency of the heat exchanger body is effectively improved, and the production continuity is ensured; and the modular design is adopted, so that the device is smaller in size and convenient to install, maintain and transport, and the maintenance cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchanger cleaning equipment, and particularly relates to an on-line heat exchanger cleaning machine. Background Art

[0002] In industrial production and building energy systems, as a core device for heat exchange, the efficient and stable operation of heat exchangers is crucial for energy utilization efficiency and system reliability. However, in applications in multiple fields such as HVAC, chemical engineering, and power, heat exchangers generally face the problem of fouling deposition caused by medium characteristics and operating environments, which seriously affects the performance of the equipment. In the HVAC system, heat exchangers in district heating substations, large commercial buildings, office buildings, hospitals, etc. undertake the key functions of heat exchange and equipment cooling. Impurities such as silt, scale, and rust in the circulating water gradually deposit in the heat exchanger, resulting in a decrease in heat transfer efficiency and an increase in energy consumption. Traditional cleaning methods require shutdown and disassembly, which not only affects the guarantee of the comfortable environment in the venue, but also causes energy waste and an increase in operation and maintenance costs. In the chemical production process, heat exchangers are used for heat exchange in chemical reactions, and the medium often contains dirt, crystals, etc. generated by chemical reactions. These substances adhere to the heat transfer surface, not only reducing the heat transfer efficiency, but also possibly causing pipeline blockage and equipment corrosion, threatening the stability and continuity of the chemical production process. Due to the high continuity requirements of chemical production, traditional off-line cleaning methods are likely to cause production interruption, resulting in significant economic losses. In the power industry, heat exchangers are widely used in equipment such as condensers and evaporators. Fouling formed by scale, impurities, and microbial growth caused by water quality problems in the circulating water system will significantly reduce the heat transfer efficiency, increase energy consumption, and even cause equipment failures, resulting in a reduction in power generation or shutdown accidents. Traditional cleaning methods are difficult to effectively remove fouling during the operation of the equipment and cannot meet the requirements for the long-term reliable operation of power generation equipment.

[0003] In the prior art, the cleaning and maintenance of heat exchangers mostly rely on off-line processing, which has defects such as cumbersome operation, time-consuming and energy-consuming, and affecting the normal operation of the system. How to achieve efficient and convenient cleaning of heat exchangers without interrupting the system operation has become a technical problem to be solved urgently. Summary of the Invention

[0004] In order to overcome the deficiencies in the prior art that the cleaning of heat exchangers mostly relies on off-line processing, which has cumbersome operation, time-consuming and energy-consuming, and affects the normal operation of the system, one of the purposes of the present invention is to provide an on-line heat exchanger cleaning machine.

[0005] One of the objectives of the present invention is achieved by the following technical solution: An on-line cleaning machine for a heat exchanger, comprising a frame: A cleaning mechanism is provided on the upper surface of the frame, and a heat exchanger body is connected to one side of the cleaning mechanism. The cleaning mechanism includes a liquid storage tank housing, a filtration module provided inside the liquid storage tank housing, a clear water tank provided below the filtration module, a circulation pump provided on the outer side wall of the liquid storage tank housing, and three flow disturbance baffles provided inside the liquid storage tank housing; Both ends of the circulation pump are respectively connected to a water inlet pipe and a water guide pipe. The water inlet pipe and the water guide pipe are respectively connected to the inner wall of the clear water tank and the water inlet of the heat exchanger body by means of a flexible joint. The water outlet end of the heat exchanger body is connected to a water outlet pipe by means of a flexible joint, and the water outlet pipe is connected to the inner wall of the liquid storage tank housing by means of a flexible joint. A temperature control device is also provided on the outer side wall of the liquid storage tank housing. The cleaning mechanism facilitates the on-line cleaning of the heat exchanger body without the need to remove the heat exchanger body for cleaning, effectively improving the cleaning efficiency of the heat exchanger body. Moreover, the water inlet pipe, the water guide pipe, and the water outlet pipe are all made of stainless steel corrugated pipes, which have good flexibility and can be bent and arranged during use to ensure the sealing and pressure resistance of the entire pipeline system.

[0006] According to the on-line cleaning machine for a heat exchanger described above, a partition plate is fixedly provided on one inner wall of the liquid storage tank housing. A support plate is fixedly connected to one side of the partition plate. The clear water tank is installed above the support plate by means of screws, and the filtration module is lapped above the clear water tank. This facilitates the installation and disassembly of the filtration module and the clear water tank, and the assembly is convenient.

[0007] According to the on-line cleaning machine for a heat exchanger described above, the filtration module includes an outer shell that penetrates up and down, a plate body fixedly provided above the outer shell, through grooves equidistantly provided above the plate body, and filter cartridges installed on the inner walls of the through grooves. The plate body and the partition plate are assembled by means of screws. This improves the installation stability and disassembly convenience of the filtration module, and the filter cartridges can filter the sewage after cleaning, facilitating recycling and reuse.

[0008] According to the on-line cleaning machine for a heat exchanger described above, a mounting plate is fixedly provided on one side wall of the liquid storage tank housing close to the circulation pump. The circulation pump is bolted above the mounting plate. This facilitates the installation and disassembly of the circulation pump.

[0009] According to the on-line cleaning machine for a heat exchanger described above, a liquid adding port is provided on one side above the liquid storage tank housing, and a cover plate I is lapped on the inner wall of the liquid adding port. This facilitates the addition of cleaning liquid and clear water into the liquid storage tank housing, and the remaining amount of cleaning water inside the liquid storage tank can be observed through the liquid adding port, so as to facilitate timely addition and is convenient to use.

[0010] According to the described on-line cleaning machine for heat exchanger, a placement opening is provided above one side of the liquid storage tank housing away from the liquid filling port, and a second cover plate is lapped on the inner wall of the placement opening. Through the placement opening and the second cover plate, it is convenient to remove the filter module from the placement opening, so as to facilitate the cleaning of impurities attached to the surface of the filter element, and the disassembly and cleaning are relatively convenient.

[0011] According to the described on-line cleaning machine for heat exchanger, the temperature control device includes a heating rod installed on the inner wall of the liquid storage tank housing. A temperature controller is installed on the side wall of the liquid storage tank housing close to the heating rod. One end of the temperature controller is electrically connected to a temperature sensor, and one end of the temperature sensor extends into the liquid storage tank housing. The heating rod is electrically connected to the temperature sensor. It is convenient to heat and control the temperature of the cleaning liquid, and avoid the influence of too high or too low temperature of the cleaning liquid on the cleaning effect.

[0012] According to the described on-line cleaning machine for heat exchanger, a sewage discharge pipe is hinged under the liquid storage tank housing. A baffle is movably connected to the inner wall of the sewage discharge pipe. A fixed sleeve is fixedly connected to one side wall of the sewage discharge pipe. A valve rod is threadedly connected to the inner wall of the fixed sleeve. The valve rod movably penetrates through the side wall of the sewage discharge pipe and is fixedly connected to the baffle. It is convenient to discharge the impurities deposited inside the liquid storage tank through the sewage discharge pipe. Through the fixed sleeve, the valve rod and the baffle, it is convenient to control the opening and closing of the sewage discharge pipe for sewage discharge and cleaning.

[0013] According to the described on-line cleaning machine for heat exchanger, a rotating wheel is fixedly connected to one end of the valve rod, which is convenient for rotating the valve rod.

[0014] According to the described on-line cleaning machine for heat exchanger, brake universal wheels are installed below the frame in a rectangular array. It is convenient to move the device, and effectively improves the moving flexibility of the device.

[0015] The beneficial effects of the above solution are:

[0016] 1. Through the setting of the cleaning mechanism, compared with the prior art, the cleaning mechanism of the present device using modular design is convenient for on-line cleaning of the heat exchanger body, and it is not necessary to remove the heat exchanger body for cleaning, thus effectively improving the cleaning efficiency of the heat exchanger body, ensuring the continuity of production, and the modular design makes the device smaller in volume, convenient for installation, maintenance and transportation, and thus effectively reduces the maintenance cost.

[0017] 2. Through the settings of the spoiler baffle, fixed sleeve, stopper, valve stem and runner, the spoiler baffle can make the cleaning liquid inside the liquid storage tank shell form a swirl, allowing the solid impurities in the heat exchanger body to settle downward to the bottom sewage pipe. At the same time, through the spoiler baffle and the filtration module, the discharge of waste liquid can be reduced and the consumption of cleaning liquid can be reduced, thereby reducing the cleaning cost and environmental pollution. At the same time, with the cooperation of the fixed sleeve, stopper, valve stem and runner, the impurities can be discharged through the sewage pipe, effectively improving the practicability and convenience of the device.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments;

[0020] Figure 1 It is a schematic diagram of the overall structure of an on-line cleaning machine for a heat exchanger according to the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the heat exchanger body of an on-line cleaning machine for a heat exchanger according to the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the cleaning mechanism of an on-line cleaning machine for a heat exchanger according to the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the filtration module of an on-line cleaning machine for a heat exchanger according to the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the first cover plate of an on-line cleaning machine for a heat exchanger according to the present invention;

[0025] Figure 6 It is an on-line cleaning machine for a heat exchanger according to the present invention Figure 5 The enlarged schematic diagram of part A.

[0026] LEGEND DESCRIPTION:

[0027] 1. Frame; 2. Cleaning mechanism; 201. Liquid storage tank housing; 202. Filter module; 2021. Outer shell; 2022. Plate body; 2023. Through groove; 2024. Filter element; 203. Clean water tank; 204. Circulation pump; 205. Turbulence baffle; 3. Heat exchanger body; 4. Water inlet pipe; 5. Water guide pipe; 6. Water outlet pipe; 7. Temperature control device; 8. Partition board; 9. Support plate; 10. Mounting plate; 11. Liquid filling port; 12. Cover plate 1; 13. Placement port; 14. Cover plate 2; 15. Heating rod; 16. Temperature controller; 17. Temperature sensor; 18. Sewage discharge pipe; 19. Stopper; 20. Fixed sleeve; 21. Valve stem; 22. Runner; 23. Brake universal wheel. Detailed implementation manners

[0028] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be construed as a limitation on the protection scope of the present invention.

[0029] Refer to Figures 1-6, an on-line cleaning machine for heat exchangers, comprising a frame 1: a cleaning mechanism 2 is arranged on the upper surface of the frame 1, one side of the cleaning mechanism 2 is connected to a heat exchanger body 3, the cleaning mechanism 2 includes a liquid storage tank housing 201, a filtering module 202 arranged inside the liquid storage tank housing 201, a clean water tank 203 arranged below the filtering module 202, a circulation pump 204 arranged on the outer side wall of the liquid storage tank housing 201, and three flow disturbance baffles 205 arranged inside the liquid storage tank housing 201. Both ends of the circulation pump 204 are respectively connected to a water inlet pipe 4 and a water guide pipe 5. The water inlet pipe 4 and the water guide pipe 5 are respectively connected to the inner wall of the clean water tank 203 and the water inlet of the heat exchanger body 3 by means of flexible joints. The water outlet end of the heat exchanger body 3 is connected to a water outlet pipe 6 by means of a flexible joint, and the water outlet pipe 6 is connected to the inner wall of the liquid storage tank housing 201 by means of a flexible joint. A temperature control device 7 is also arranged on the outer side wall of the liquid storage tank housing 201. A partition plate 8 is fixedly arranged on one side inner wall of the liquid storage tank housing 201. One side of the partition plate 8 is fixedly connected to a support plate 9. The clean water tank 203 is installed above the support plate 9 by means of screws. The filtering module 202 is lapped above the clean water tank 203. The filtering module 202 includes a housing 2021 that penetrates up and down, a plate body 2022 fixedly arranged above the housing 2021, through grooves 2023 equidistantly arranged above the plate body 2022, and filter elements 2024 installed on the inner walls of the through grooves 2023. The plate body 2022 and the partition plate 8 are assembled by means of screws. An installation plate 10 is fixedly arranged on one side wall of the liquid storage tank housing 201 close to the circulation pump 204. The circulation pump 204 is bolted above the installation plate 10. A liquid adding port 11 is opened on one side above the liquid storage tank housing 201. A cover plate one 12 is lapped on the inner wall of the liquid adding port 11. A placing port 13 is opened on the upper side of the liquid storage tank housing 201 far from the liquid adding port 11. A cover plate two 14 is lapped on the inner wall of the placing port 13. The temperature control device 7 includes a heating rod 15 installed on the inner wall of the liquid storage tank housing 201. A temperature controller 16 is installed on one side wall of the liquid storage tank housing 201 close to the heating rod 15. One end of the temperature controller 16 is electrically connected to a temperature sensor 17. One end of the temperature sensor 17 extends into the liquid storage tank housing 201. The heating rod 15 and the temperature sensor 17 are electrically connected. A sewage discharge pipe 18 is connected to the lower part of the liquid storage tank housing 201 by means of a flexible joint. A block 19 is movably connected to the inner wall of the sewage discharge pipe 18. A fixed sleeve 20 is fixedly connected to one side wall of the sewage discharge pipe 18. A valve rod 21 is threadedly connected to the inner wall of the fixed sleeve 20. The valve rod 21 movably penetrates through the side wall of the sewage discharge pipe 18 and is fixedly connected to the block 19. One end of the valve rod 21 is fixedly connected to a runner 22. Brake universal wheels 23 are installed below the frame 1 in a rectangular array.

[0030] The device is equipped with a cleaning mechanism 2 to facilitate on-line cleaning of the heat exchanger body 3. It is not necessary to remove the heat exchanger body 3 for cleaning, thus effectively improving the cleaning efficiency of the heat exchanger body 3, ensuring the continuity of production. By adopting the method of not removing the heat exchanger body 3 for cleaning, it can avoid damaging the heat exchanger body 3 during the process of removing or cleaning it, thereby shortening the service life of the heat exchanger body 3. Moreover, the cleaning mechanism 2 is modularly designed, making the device smaller in size and higher in integration degree, which is convenient for the installation, maintenance and transportation of the device, and effectively reduces the maintenance cost. The installation of the spoiler baffle 205 can make the cleaning liquid inside the liquid storage tank housing 201 form a swirl, allowing the solid impurities in the heat exchanger body 3 to settle downward to the bottom sewage discharge pipe 18. At the same time, through the spoiler baffle 205 and the filtration module 202, the discharge of waste liquid and the consumption of cleaning liquid can be reduced, thus reducing energy consumption. When it is necessary to discharge the solid impurities deposited at the bottom of the liquid storage tank housing 201, rotate the runner 22. Through the rotational engagement of the valve rod 21 with the fixed sleeve 20, the valve rod 21 is driven to move outward on the inner wall of the fixed sleeve 20. The movement of the valve rod 21 drives the block 19 to move from the inner wall of the sewage discharge pipe 18 to the inner wall of the fixed sleeve 20, so that the block 19 is removed from the inner wall of the sewage discharge pipe 18 to open the sewage discharge pipe 18. Thus, the solid impurities mixed with water are discharged to the outside through the sewage discharge pipe 18, which is convenient to use.

[0031] Working principle: When it is necessary to perform on-line cleaning on the heat exchanger body 3, the pushing device drives the device to move to the heat exchanger body 3 through the brake universal wheel 23, and connects the water guiding pipe 5 and the water outlet pipe 6 to the water inlet and water outlet of the heat exchanger body 3 respectively, so as to connect the device with the heat exchanger body 3 for on-line cleaning. First, add clean water and cleaning liquid into the liquid storage tank housing 201 through the liquid filling port 11, mix the clean water and cleaning liquid through the three flow disturbing baffles 205, and the cleaning liquid enters the clean water tank 203 through the filter module 202. Start the circulation pump 204 to introduce the cleaning liquid inside the clean water tank 203 to the heat exchanger body 3 through the water inlet pipe 4 and the water guiding pipe 5 for cleaning. The sewage from the cleaning flows back into the liquid storage tank housing 201 through the water outlet pipe 6 again. Through the three flow disturbing baffles 205, the cleaning liquid and sewage are mixed to form a swirl, and the solid impurities in the heat exchanger body 3 sink downward to the sewage discharge pipe 18 at the bottom of the liquid storage tank housing 201. Then the sewage is mixed with the cleaning liquid and enters the filter element 2024. The filter element 2024 filters the sewage into clean water, and the clean water is stored in the clean water tank 203 and circulated by the circulation pump 204 to perform on-line cleaning on the heat exchanger body 3, so as to facilitate the non-stop cleaning of the heat exchanger body 3, ensure the continuity of production and improve the cleaning efficiency of the heat exchanger body 3. At the same time, the temperature control device 7 can control the temperature of the cleaning liquid to avoid the temperature of the cleaning liquid being too high or too low affecting the operation safety of the heat exchanger body 3. The cleaning liquid is heated by the heating rod 15, the temperature of the cleaning liquid is monitored by the temperature sensor 17, and the temperature is flexibly regulated by the temperature controller 16;

[0032] When it is necessary to clean the impurities on the surface of the filter element 2024 of the filter module 202, remove the cover plate two 14 from the placement port 13, and remove the screws at the connection between the partition plate 8 and the plate body 2022, so as not to limit the filter module 202 on the partition plate 8 and above the clean water tank 203. Then take out the filter module 202 from the placement port 13 to remove the filter module 202, so as to facilitate the cleaning of the impurities on the surface of the filter module 202 to ensure the filtering effect of the filter element 2024;

[0033] Compared with the existing off-line cleaning, this device can realize on-line cleaning, which not only effectively improves the cleaning efficiency and convenience, but also can recycle and reuse the sewage through the filter module 202, thus effectively reducing the discharge of waste liquid, reducing energy consumption, and the device adopts modular design with higher integration degree and smaller floor area, which is convenient for installation, maintenance and transportation.

[0034] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present invention pertains, various changes can be made without departing from the purpose of the present invention.

Claims

1. An on-line cleaning machine for a heat exchanger, characterized in that, Including a frame (1): A cleaning mechanism (2) is provided on the upper surface of the frame (1). One side of the cleaning mechanism (2) is connected to a heat exchanger body (3). The cleaning mechanism (2) includes a liquid storage tank housing (201), a filtering module (202) provided inside the liquid storage tank housing (201), a clean water tank (203) provided below the filtering module (202), a circulation pump (204) provided on the outer side wall of the liquid storage tank housing (201), and three flow disturbing baffles (205) provided inside the liquid storage tank housing (201). Both ends of the circulation pump (204) are respectively connected to a water inlet pipe (4) and a water guiding pipe (5). The water inlet pipe (4) and the water guiding pipe (5) are respectively connected to the inner wall of the clean water tank (203) and the water inlet of the heat exchanger body (3) by flexible joints. The water outlet end of the heat exchanger body (3) is connected to a water outlet pipe (6) by a flexible joint. The water outlet pipe (6) is connected to the inner wall of the liquid storage tank housing (201) by a flexible joint. A temperature control device (7) is also provided on the outer side wall of the liquid storage tank housing (201).

2. The on-line cleaning machine for a heat exchanger according to claim 1, wherein, A partition plate (8) is fixedly provided on one side inner wall of the liquid storage tank housing (201). One side of the partition plate (8) is fixedly connected to a support plate (9). The clean water tank (203) is installed above the support plate (9) by screws. The filtering module (202) is lapped above the clean water tank (203).

3. The on-line cleaning machine for a heat exchanger according to claim 2, characterized in that, The filtering module (202) includes a housing (2021) that is vertically penetrated, a plate body (2022) fixedly provided above the housing (2021), through grooves (2023) equidistantly opened above the plate body (2022), and filtering filter elements (2024) installed on the inner walls of the through grooves (2023). The plate body (2022) and the partition plate (8) are assembled by screws.

4. An on-line cleaning machine for a heat exchanger according to claim 1, characterized in that, An installation plate (10) is fixedly provided on one side side wall of the liquid storage tank housing (201) close to the circulation pump (204). The circulation pump (204) is bolted above the installation plate (10).

5. The on-line cleaning machine for a heat exchanger according to claim 1, wherein A liquid adding port (11) is opened on one side above the liquid storage tank housing (201). A cover plate one (12) is lapped on the inner wall of the liquid adding port (11).

6. The on-line cleaning machine for a heat exchanger according to claim 5, wherein, A placing port (13) is opened on one side above the liquid storage tank housing (201) away from the liquid adding port (11). A cover plate two (14) is lapped on the inner wall of the placing port (13).

7. The on-line cleaning machine for a heat exchanger according to claim 1, characterized in that, The temperature control device (7) includes a heating rod (15) installed on the inner wall of the liquid storage tank housing (201). A temperature controller (16) is installed on one side side wall of the liquid storage tank housing (201) close to the heating rod (15). One end of the temperature controller (16) is electrically connected to a temperature sensor (17). One end of the temperature sensor (17) extends into the liquid storage tank housing (201). The heating rod (15) is electrically connected to the temperature sensor (17).

8. An on-line cleaning machine for a heat exchanger according to claim 1, characterized in that, A drain pipe (18) is connected by a flexible joint below the liquid storage tank housing (201). A baffle block (19) is movably connected to the inner wall of the drain pipe (18). A fixed sleeve (20) is fixedly connected to one side wall of the drain pipe (18). A valve stem (21) is threadedly connected to the inner wall of the fixed sleeve (20). The valve stem (21) movably penetrates through the side wall of the drain pipe (18) and is fixedly connected to the baffle block (19).

9. The on-line cleaning machine for a heat exchanger according to claim 8, wherein, One end of the valve stem (21) is fixedly connected to a rotating wheel (22).

10. The on-line cleaning machine for a heat exchanger according to claim 1, characterized in that, Brake universal wheels (23) are installed below the frame (1) in a rectangular array.

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