A scale removing device and method for air-cooled heat exchanger with composite function

Abstract

The application discloses a kind of composite function air cooling heat exchanger scale removal device and method, wherein air cooling heat exchanger scale removal device includes chassis, gyro wheel, dust collector, suction pipe, first conduit, second conduit, feed pipe, pump suction module, liquid guide pipe, first ball valve, scale remover container, multiphase container, second ball valve, third ball valve, exhaust port, first control valve, second control valve, suction end, connecting pipe, spout, fluid control pipe group module, third conduit, fourth conduit and venturi injection pipe.The application can select different scale removal mode according to different working conditions by controlling the opening and closing of different valve bodies, and can switch spout material according to site condition and complete scale removal by cooperating with pump suction, with the advantages of functional diversity, simple structure and strong applicability.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger descaling technology, and in particular to a descaling device and method for air-cooled heat exchangers with multiple functions. Background Technology

[0002] Finned air-cooled heat exchangers are widely used in industries such as petroleum, natural gas, chemical, and power generation, particularly in the natural gas compression industry. Due to their prolonged contact with air during operation, the heat exchanger surface easily accumulates large amounts of dust, oil, flocculent matter, and other contaminants. These contaminants adhere to the heat exchange tubes, clogging the external airflow channels and severely impacting heat exchange efficiency. Therefore, descaling treatment is necessary to ensure optimal heat exchange performance.

[0003] Current descaling methods for air-cooled heat exchangers include mechanical cleaning, chemical cleaning, ultrasonic cleaning, and dry ice cleaning, each with its own advantages and disadvantages. Physical descaling methods can quickly remove thicker and larger scale deposits, but they may not be effective for heat exchangers with complex surface structures, or for hard or deep-seated scale. Air purging is a simple and easy method, but its cleaning effect is limited. Chemical descaling removes scale through dissolution or reaction, and can thoroughly clean all parts of the heat exchanger, especially those hard-to-reach small structures, but special attention must be paid to chemical corrosion.

[0004] In conclusion, a single method cannot comprehensively solve the cleaning problems of different types of dirt and may damage equipment or leave chemical residues. As equipment complexity and operational requirements increase, the importance of integrated composite cleaning technologies becomes increasingly apparent. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a descaling device and method for air-cooled heat exchangers with multiple functions. By controlling the opening and closing of different valves, different descaling methods can be switched, allowing for targeted control and improving the descaling effect of the equipment.

[0006] The technical solution adopted in this invention is as follows:

[0007] A descaling device for an air-cooled heat exchanger with multiple functions includes a chassis, rollers, a dust collection box, a suction pipe, a first conduit, a second conduit, a feed pipe, a pump suction module, a liquid guide pipe, a first ball valve, a descaling agent container, a multiphase container, a second ball valve, a third ball valve, an exhaust port, a first control valve, a second control valve, an air intake end, a connecting pipe, a nozzle, a fluid control pipe assembly module, a third conduit, a fourth conduit, and a Venturi ejector.

[0008] The rollers are located at the bottom of the chassis. The dust collection box, pump suction module, descaling agent container, and multiphase container are all located on the chassis. The dust collection box is connected to the pump suction module. One end of the suction pipe is connected to the dust collection box, and the other end is connected to the first conduit. Both the first and second conduits are connected to the suction end, and the front end of the second conduit is provided with a nozzle. One end of the feed pipe is connected to the multiphase container, and the other end is connected to the second conduit. The pump suction module is provided with an exhaust port. The bottom ends of the descaling agent container and the multiphase container are provided with a first control valve and a second control valve. The fluid control pipe assembly module is connected to the pump suction module, and the first ball valve of the fluid control pipe assembly module is connected to the descaling agent container through a liquid guide pipe, the second ball valve is connected to the lower liquid phase of the multiphase container through a third conduit, the third ball valve is connected to the upper gas phase of the multiphase container through a fourth conduit, and the two ends of the Venturi ejector are connected to the feed pipe and the connecting pipe, respectively.

[0009] Furthermore, the pump suction module includes a one-way valve, a pressure relief valve, a suction pipe, a base, a drive motor, and a compressor. The one-way valve, the pressure relief valve, and the suction pipe are all connected to the compressor. The pressure relief valve is connected to the exhaust port. The drive motor is connected to the compressor and is also mounted on the base.

[0010] Furthermore, in the pump suction module, driven by the drive motor, the compressor can draw in and compress external gas through the suction pipe; when the pressure relief valve is open, the compressed gas is directly discharged into the atmosphere through the exhaust port; when the pressure relief valve is closed, the compressed gas flows to the one-way valve and is ejected from the nozzle through the connecting pipe, the feeding pipe and the second conduit.

[0011] Furthermore, the descaling device for the air-cooled heat exchanger also includes a booster pump, one end of which is connected to a descaling agent container, and the other end is connected to a first ball valve via a liquid guide pipe.

[0012] A descaling method for an air-cooled heat exchanger with multiple functions includes:

[0013] Negative pressure descaling: negative pressure is generated by the pump suction module to remove dirt from the surface of the air-cooled heat exchanger;

[0014] Purging and descaling: The exhaust gas from the pump suction module is recovered and sprayed from the nozzle onto the air-cooled heat exchanger for purging and descaling;

[0015] Chemical descaling: Chemical descaling agent is introduced through a pump module and a Venturi ejector tube, and then sprayed from the nozzle onto the air-cooled heat exchanger for chemical descaling;

[0016] Water washing and descaling: Water in the multiphase container is introduced into the third conduit under pressure to form a pressurized water flow, which is then sprayed out from the nozzle onto the air-cooled heat exchanger for water washing and descaling.

[0017] Steam descaling: The liquid in the multiphase container is heated to form steam, which enters the third conduit and is sprayed out from the nozzle onto the air-cooled heat exchanger for steam descaling.

[0018] Furthermore, in the negative pressure descaling process, negative pressure is generated by a pump suction module to remove scale from the surface of the air-cooled heat exchanger, including:

[0019] Open the pressure relief valve of the pump suction module to suck in solid particles and dirt from the air-cooled heat exchanger through the suction end. The dirt enters the dust collection box through the first conduit and the suction pipe, and the gas compressed by the pump suction module is discharged through the exhaust port.

[0020] Furthermore, in the purging and descaling process, the exhaust gas from the pump module is recovered and sprayed from the nozzle onto the air-cooled heat exchanger for purging and descaling, including:

[0021] Close the pressure relief valve of the pump suction module, and close the first ball valve, the second ball valve, and the third ball valve. The gas compressed by the pump suction module is then sprayed from the nozzle through the connecting pipe, the feed pipe, and the second conduit to the air-cooled heat exchanger for purging and descaling.

[0022] Furthermore, in the chemical descaling process, the chemical descaling agent is introduced through a pump module and a Venturi ejector and sprayed from a nozzle onto the air-cooled heat exchanger for chemical descaling, including:

[0023] Close the pressure relief valve of the pump suction module, close the second and third ball valves, and open the first ball valve. The descaling agent in the descaling agent container enters the liquid guide pipe under pressure, and is sprayed from the nozzle onto the air-cooled heat exchanger through the feed pipe and the second conduit for chemical descaling.

[0024] Furthermore, in the water washing and descaling process, water from the multiphase container is introduced into the third conduit under pressure to form a pressurized water flow, which is then sprayed from the nozzle onto the air-cooled heat exchanger for water washing and descaling, including:

[0025] Close the pressure relief valve of the pump suction module, close the first ball valve and the third ball valve, and open the second ball valve. Water in the multiphase container enters the third conduit under pressure, and the water is sprayed from the nozzle onto the air-cooled heat exchanger for water washing and descaling via the feed pipe and the second conduit.

[0026] Furthermore, in the steam descaling process, the liquid in the multiphase container is heated to form steam, which enters the third conduit and is then sprayed from the nozzle onto the air-cooled heat exchanger for steam descaling, including:

[0027] The pressure relief valve of the pump suction module is closed, the first ball valve and the second ball valve are closed, and the third ball valve is opened. The water in the multiphase container is heated and evaporated to form water vapor, which enters the fourth conduit and is sprayed from the nozzle onto the air-cooled heat exchanger through the feed pipe and the second conduit for steam descaling.

[0028] The beneficial effects of this invention are as follows:

[0029] (1) By controlling the opening and closing of different valve bodies, the present invention can select different descaling methods according to different working conditions. It combines multiple functions into one, and can switch the nozzle material according to the site conditions and cooperate with the pump to complete the descaling. It has the advantages of diverse functions, simple structure and strong applicability.

[0030] (2) This invention can descale air-cooled heat exchangers using high-temperature steam, high-pressure water flow, chemical descaling agents, and air, respectively. Mode 1: The pump suction module creates negative pressure to remove surface dirt from the heat exchanger and directly discharges useless gas through a valve; Mode 2: By controlling the valve, the high-pressure exhaust gas from the pump suction module is recovered and ejected from the nozzle, achieving jet cleaning of dirt; Mode 3: Through a Venturi nozzle, the high-pressure, high-speed gas from the pump suction module directly induces the chemical descaling agent, which is then ejected from the nozzle, achieving chemical dissolution of dirt and removing it from the heat exchanger using a dust suction mode; Mode 4: Water in the multiphase container enters the duct under the induction of the nozzle, forming a water flow, and is finally sprayed onto the finned tubes at the nozzle, cleaning the dirt on the finned tubes; Mode 5: The liquid in the multiphase container is heated to form high-pressure steam, which enters the duct and is ejected from the nozzle under the induction of the Venturi nozzle, decomposing the dust on the finned tubes and removing the heat exchanger dirt using a dust suction mode. Attached Figure Description

[0031] Figure 1 This is a side view of the descaling device for an air-cooled heat exchanger according to Embodiment 1 of the present invention.

[0032] Figure 2 This is a front view of the descaling device for an air-cooled heat exchanger according to Embodiment 1 of the present invention.

[0033] Figure 3 This is a schematic diagram of the right side of the descaling device for the air-cooled heat exchanger in Embodiment 1 of the present invention.

[0034] Figure 4 This is a schematic diagram of the fluid control pipe assembly module structure of Embodiment 1 of the present invention.

[0035] Figure 5 This is a schematic diagram of the pump suction module structure of Embodiment 1 of the present invention.

[0036] Reference numerals: 1-Chassis, 2-Roller, 3-Dust collection box, 4-Suction pipe, 5-First conduit, 6-Second conduit, 7-Feeding pipe, 8-Pump suction module, 9-Liquid guide pipe, 10-First ball valve, 11-Descaling agent container, 12-Multiphase container, 13-Second ball valve, 14-Third ball valve, 15-Exhaust port, 16-Booster pump, 17-First control valve, 18-Second control valve, 19-Suction end, 20-Connecting pipe, 21-Nozzle, 22-Fluid control pipe assembly module, 23-Third conduit, 24-Fourth conduit, 25-Venturi ejector tube; 801-Check valve, 802-Pressure relief valve, 803-Suction pipe, 804-Base, 805-Drive motor, 806-Compressor. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments are now described. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] like Figures 1-3 As shown, this embodiment provides a descaling device for an air-cooled heat exchanger with multiple functions, including a chassis 1, rollers 2, a dust collection box 3, a suction pipe 4, a first conduit 5, a second conduit 6, a feed pipe 7, a pump suction module 8, a liquid guide pipe 9, a first ball valve 10, a descaling agent container 11, a multiphase container 12, a second ball valve 13, a third ball valve 14, an exhaust port 15, a first control valve 17, a second control valve 18, an air intake end 19, a connecting pipe 20, a nozzle 21, a fluid control pipe assembly module 22, a third conduit 23, a fourth conduit 24, and a Venturi ejector tube 25. The roller 2 is located at the bottom of the chassis 1. The dust collection box 3, the pump suction module 8, the descaling agent container 11, and the multiphase container 12 are all located on the chassis 1. The dust collection box 3 is connected to the pump suction module 8. One end of the suction pipe 4 is connected to the dust collection box 3, and the other end is connected to the first conduit 5. The first conduit 5 and the second conduit 6 are both connected to the suction end 19, and the front end of the second conduit 6 is provided with a nozzle 21. One end of the feed pipe 7 is connected to the multiphase container 12, and the other end is connected to the second conduit 6. The pump suction module 8 is provided with an exhaust port 15. The bottom ends of the descaling agent container 11 and the multiphase container 12 are both provided with a first control valve 17 and a second control valve 18. The fluid control pipe assembly module 22 is connected to the pump suction module 8.

[0040] like Figure 4As shown, the first ball valve 10 of the fluid control pipe assembly module 22 is connected to the descaling agent container 11 through the liquid guide pipe 9, the second ball valve 13 is connected to the lower liquid phase part of the multiphase container 12 through the third conduit 23, the third ball valve 14 is connected to the upper gas phase part of the multiphase container 12 through the fourth conduit 24, and the two ends of the Venturi ejector tube 25 are connected to the feed pipe 7 and the connecting pipe 20, respectively.

[0041] Preferably, such as Figure 5 As shown, the pumping module 8 includes a one-way valve 801, a pressure relief valve 802, a suction pipe 803, a base 804, a drive motor 805, and a compressor 806. The one-way valve 801, pressure relief valve 802, and suction pipe 803 are all connected to the compressor 806. The pressure relief valve 802 is connected to the exhaust port 15. The drive motor 805 is connected to the compressor 806 and is mounted on the base 804. In this embodiment, driven by the drive motor 805, the compressor 806 can draw in and compress external gas through the suction pipe 803. When the pressure relief valve 802 is open, the compressed gas is directly discharged into the atmosphere through the exhaust port 15. When the pressure relief valve 802 is closed, the compressed gas flows to the one-way valve 801 and is ejected from the nozzle 21 through the connecting pipe 20, the supply pipe 7, and the second conduit 6. The one-way valve 801 ensures that the gas can only flow in one direction, preventing backflow.

[0042] Preferably, the descaling device for the air-cooled heat exchanger in this embodiment further includes a booster pump 16, one end of which is connected to the descaling agent container 11, and the other end is connected to the first ball valve 10 through the liquid guide pipe 9.

[0043] Example 2

[0044] This embodiment is based on embodiment 1:

[0045] This embodiment provides a descaling method for an air-cooled heat exchanger with multiple functions, including:

[0046] Negative pressure descaling: negative pressure is generated by the pump suction module 8 to remove dirt from the surface of the air-cooled heat exchanger;

[0047] Purging and descaling: The exhaust gas from the pump suction module 8 is recovered and sprayed out from the nozzle 21 onto the air-cooled heat exchanger for purging and descaling;

[0048] Chemical descaling: Chemical descaling agent is introduced through the pump module 8 and the Venturi ejector tube 25 and sprayed out from the nozzle 21 onto the air-cooled heat exchanger for chemical descaling.

[0049] Water washing and descaling: Water in the multiphase container 12 is introduced into the third conduit 23 under pressure to form a pressurized water flow, and is sprayed out from the nozzle 21 onto the air-cooled heat exchanger for water washing and descaling.

[0050] Steam descaling: The liquid in the multiphase container 12 is heated to form steam, which enters the third conduit 23 and is sprayed out from the nozzle 21 onto the air-cooled heat exchanger for steam descaling.

[0051] Preferably, during negative pressure descaling, the pressure relief valve 802 of the pump suction module 8 is opened, and solid particles such as dust on the air-cooled heat exchanger are sucked in through the suction end 19, and enter the dust collection box 3 through the first conduit 5 and the suction pipe 4. The gas compressed by the pump suction module 8 is discharged through the exhaust port 15.

[0052] Preferably, during purging and descaling, the pressure relief valve 802 of the pump suction module 8 is closed, and the first ball valve 10, the second ball valve 13 and the third ball valve 14 are closed. The gas compressed by the pump suction module 8 is then sprayed from the nozzle 21 through the connecting pipe 20, the feed pipe 7 and the second conduit 6 to the air-cooled heat exchanger for purging and descaling.

[0053] Preferably, during chemical descaling, the pressure relief valve 802 of the pump suction module 8 is closed, the second ball valve 13 and the third ball valve 14 are closed, and the first ball valve 10 is opened. The descaling agent in the descaling agent container 11 enters the liquid guide pipe 9 under pressure, and is sprayed from the nozzle 21 onto the air-cooled heat exchanger via the feed pipe 7 and the second conduit 6 for chemical descaling.

[0054] Preferably, during water washing and descaling, the pressure relief valve 802 of the pump suction module 8 is closed, the first ball valve 10 and the third ball valve 14 are closed, and the second ball valve 13 is opened. The water in the multiphase container 12 enters the third conduit 23 under pressure, and the water is sprayed from the nozzle 21 onto the air-cooled heat exchanger for water washing and descaling via the feed pipe 7 and the second conduit 6.

[0055] Preferably, during steam descaling, the pressure relief valve 802 of the pump suction module 8 is closed, the first ball valve 10 and the second ball valve 13 are closed, and the third ball valve 14 is opened. The water in the multiphase container 12 is heated and evaporated to form water vapor, which enters the fourth conduit 24 and is sprayed from the nozzle 21 onto the air-cooled heat exchanger via the feed pipe 7 and the second conduit 6 to decompose the scale.

[0056] Therefore, this embodiment can use high-temperature steam, high-pressure water flow, chemical descaling agents, and air to descale the air-cooled heat exchanger, achieving the following modes:

[0057] Mode 1: The pump suction module creates negative pressure to remove dirt from the surface of the heat exchanger and discharges the useless gas directly through the valve;

[0058] Mode 2: By controlling the valve, the high-pressure exhaust gas from the pump suction module is recovered and ejected from the nozzle to achieve air jet cleaning of dirt;

[0059] Mode 3: The chemical descaling agent is directly injected from the nozzle by the high pressure and high speed of the pump suction module through the venturi nozzle, so as to chemically dissolve the dirt and remove the dirt from the heat exchanger by the dust suction mode.

[0060] Mode 4: Water in the multiphase container enters the duct under the ejection action of the nozzle, forming a water flow, and finally sprays out of the nozzle onto the finned tube to clean the dirt on the finned tube.

[0061] Mode 5: The liquid in the multiphase container is heated to form high-pressure steam, which enters the duct and is ejected from the nozzle under the action of the Venturi nozzle. This decomposes the dirt on the finned tubes and removes the dirt from the heat exchanger using a dust suction mode.

[0062] In summary, the air-cooled heat exchanger descaling device and method of the present invention have wide adaptability and comprehensive functions. By controlling the opening and closing of different valves, different descaling methods can be switched, allowing for targeted control and improving the descaling effect of the equipment.

[0063] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A descaling device for an air-cooled heat exchanger with multiple functions, characterized in that, It includes a chassis (1), rollers (2), dust collection box (3), suction pipe (4), first conduit (5), second conduit (6), feed pipe (7), pump suction module (8), liquid guide pipe (9), first ball valve (10), descaling agent container (11), multiphase container (12), second ball valve (13), third ball valve (14), exhaust port (15), first control valve (17), second control valve (18), suction end (19), connecting pipe (20), nozzle (21), fluid control pipe assembly module (22), third conduit (23), fourth conduit (24), and Venturi ejector (25); The roller (2) is located at the bottom of the chassis (1). The dust collection box (3), pump suction module (8), descaling agent container (11), and multiphase container (12) are all located on the chassis (1). The dust collection box (3) is connected to the pump suction module (8). One end of the suction pipe (4) is connected to the dust collection box (3), and the other end is connected to the first conduit (5). The first conduit (5) and the second conduit (6) are both connected to the suction end (19). The front end of the second conduit (6) is provided with a nozzle (21). One end of the feed pipe (7) is connected to the multiphase container (12), and the other end is connected to the second conduit (6). The pump suction module (8) is provided with an exhaust port (15). The descaling agent container (11) and the multiphase container (12) are both equipped with a first control valve (17) and a second control valve (18) at their bottom ends. The fluid control pipe assembly module (22) is connected to the pump suction module (8), and the first ball valve (10) of the fluid control pipe assembly module (22) is connected to the descaling agent container (11) through the liquid guide pipe (9), the second ball valve (13) is connected to the lower liquid phase of the multiphase container (12) through the third conduit (23), the third ball valve (14) is connected to the upper gas phase of the multiphase container (12) through the fourth conduit (24), and the two ends of the Venturi ejector tube (25) are connected to the feed pipe (7) and the connecting pipe (20) respectively.

2. The descaling device for an air-cooled heat exchanger with multiple functions according to claim 1, characterized in that, The pump suction module (8) includes a one-way valve (801), a pressure relief valve (802), a suction pipe (803), a base (804), a drive motor (805), and a compressor (806). The one-way valve (801), the pressure relief valve (802), and the suction pipe (803) are all connected to the compressor (806). The pressure relief valve (802) is connected to the exhaust port (15). The drive motor (805) is connected to the compressor (806) and is also mounted on the base (804).

3. The descaling device for an air-cooled heat exchanger with multiple functions according to claim 2, characterized in that, In the pump suction module (8), driven by the drive motor (805), the compressor (806) can suck in and compress external gas through the suction pipe (803); when the pressure relief valve (802) is open, the compressed gas is directly discharged into the atmosphere through the exhaust port (15); when the pressure relief valve (802) is closed, the compressed gas flows to the one-way valve (801) and is ejected from the nozzle (21) through the connecting pipe (20), the feeding pipe (7) and the second conduit (6).

4. The descaling device for an air-cooled heat exchanger with multiple functions according to claim 1, characterized in that, It also includes a booster pump (16), one end of which is connected to the descaling agent container (11), and the other end is connected to the first ball valve (10) through the liquid guide pipe (9).

5. A descaling method for an air-cooled heat exchanger with multiple functions, applied to the descaling device for an air-cooled heat exchanger with multiple functions as described in claim 1, characterized in that, include: Negative pressure descaling: negative pressure is generated by the pump suction module (8) to remove dirt from the surface of the air-cooled heat exchanger; Purging and descaling: The exhaust gas from the pump suction module (8) is recovered and sprayed from the nozzle (21) onto the air-cooled heat exchanger for purging and descaling; Chemical descaling: Chemical descaling agent is introduced through the pump suction module (8) and the Venturi ejector tube (25) and sprayed from the nozzle (21) onto the air-cooled heat exchanger for chemical descaling; Water washing and descaling: Water in the multiphase container (12) is introduced into the third conduit (23) under pressure to form a pressurized water flow, and sprayed out from the nozzle (21) onto the air-cooled heat exchanger for water washing and descaling; Steam descaling: The liquid in the multiphase container (12) is heated to form steam, which enters the third conduit (23) and is sprayed out from the nozzle (21) onto the air-cooled heat exchanger for steam descaling.

6. A descaling method for an air-cooled heat exchanger with multiple functions according to claim 5, characterized in that, In the negative pressure descaling process, negative pressure is generated by the pump suction module (8) to remove the surface fouling of the air-cooled heat exchanger, including: Open the pressure relief valve (802) of the pump suction module (8), and suck in the solid particulate dirt on the air-cooled heat exchanger through the suction end (19). The dirt enters the dust collection box (3) through the first conduit (5) and the suction pipe (4), and the gas compressed by the pump suction module (8) is discharged through the exhaust port (15).

7. A descaling method for an air-cooled heat exchanger with multiple functions according to claim 5, characterized in that, In the purging and descaling process, the exhaust gas from the pump suction module (8) is recovered and sprayed from the nozzle (21) onto the air-cooled heat exchanger for purging and descaling, including: Close the pressure relief valve (802) of the pump suction module (8), and close the first ball valve (10), the second ball valve (13) and the third ball valve (14). The gas compressed by the pump suction module (8) is sprayed from the nozzle (21) through the connecting pipe (20), the feed pipe (7) and the second conduit (6) to the air-cooled heat exchanger for purging and descaling.

8. A descaling method for an air-cooled heat exchanger with multiple functions according to claim 5, characterized in that, In the chemical descaling process, the chemical descaling agent is introduced through the pump module (8) and the Venturi ejector tube (25) and sprayed from the nozzle (21) onto the air-cooled heat exchanger for chemical descaling, including: Close the pressure relief valve (802) of the pump suction module (8), close the second ball valve (13) and the third ball valve (14), and open the first ball valve (10). The descaling agent in the descaling agent container (11) enters the liquid guide pipe (9) under pressure, and is sprayed from the nozzle (21) to the air-cooled heat exchanger through the feed pipe (7) and the second conduit (6) for chemical descaling.

9. A descaling method for an air-cooled heat exchanger with multiple functions according to claim 5, characterized in that, In the water washing and descaling process, water from the multiphase container (12) is introduced into the third conduit (23) under pressure to form a pressurized water flow, which is then sprayed from the nozzle (21) onto the air-cooled heat exchanger for water washing and descaling, including: Close the pressure relief valve (802) of the pump suction module (8), close the first ball valve (10) and the third ball valve (14), and open the second ball valve (13). The water in the multiphase container (12) enters the third conduit (23) under pressure, and the water is sprayed from the nozzle (21) onto the air-cooled heat exchanger for water washing and descaling via the feed pipe (7) and the second conduit (6).

10. A descaling method for an air-cooled heat exchanger with multiple functions according to claim 5, characterized in that, In the steam descaling process, the liquid in the multiphase container (12) is heated to form steam, which enters the third conduit (23) and is sprayed from the nozzle (21) onto the air-cooled heat exchanger for steam descaling, including: Close the pressure relief valve (802) of the pump suction module (8), close the first ball valve (10) and the second ball valve (13), and open the third ball valve (14). The water in the multiphase container (12) is heated and evaporated to form water vapor and enters the fourth conduit (24). It is then sprayed from the nozzle (21) onto the air-cooled heat exchanger for steam descaling via the feed pipe (7) and the second conduit (6).

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