A method for chemical cleaning of various types of coolers used in the engine room of a ship

Abstract

This invention discloses a method for chemical cleaning of various types of coolers in ship engine rooms. The method directly utilizes the standard chemical cleaning device configured in the ship's main engine. A second interface flange is fixedly installed on the inlet and outlet pipes of the chemical cleaning device, as well as at the downstream position of the valves on the inlet and outlet pipes of various types of coolers. These flanges are detachably connected to the chemical cleaning device and the cooler via flexible hoses. A suitable chemical cleaning agent is then selected and circulated within the cooler through the chemical cleaning device to complete the cleaning process. This method has a wide range of applications and strong adaptability, achieving chemical cleaning without disassembling the cooler. It ensures the cooler's sealing and integrity, improves cooling efficiency and extends its service life after cleaning, and avoids the limitations imposed by the confined space of the ship's cabin and the distance of existing cooler installation locations.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding, and in particular relates to a method for chemical cleaning of various types of coolers in the engine room of ships. Background Technology

[0002] Coolers of various types within a ship's engine room are crucial components of the ship's cooling system, requiring continuous operation and optimal cooling performance. However, due to impurities and corrosive compounds in the cooling medium, these impurities gradually accumulate inside the coolers over time, affecting cooling efficiency and potentially causing corrosion. Therefore, coolers require regular cleaning, especially when the pressure difference between the cooler's inlet and outlet exceeds a certain range.

[0003] Existing methods for cleaning coolers include mechanical cleaning and water cleaning, which mainly use water to rinse and remove dirt and impurities from inside the cooler. However, these methods are difficult to handle cleaning work where dirt is firmly attached. In such cases, it is often necessary to disassemble the cooler and then manually brush and rinse it with a high-pressure water gun. This is not only time-consuming and labor-intensive, but also easily damages the cooler's seal and integrity during disassembly and cleaning.

[0004] Currently, there are chemical cleaning agents available on the market for cleaning various types of coolers. The method involves circulating the chemical agent through the cooler to clean it, which not only provides a good cleaning effect but also does not damage the cooler material or piping accessories. However, this method is not suitable for various types of coolers in the ship's engine room, as the equipment is already fixed inside the engine room and it is difficult to directly use chemical cleaning agents. Installing a chemical cleaning device for each piece of equipment would be limited in terms of cost and space.

[0005] Chinese invention application CN107354474B discloses a multifunctional mobile chemical cleaning vehicle suitable for heat exchangers in industrial equipment. The vehicle body includes a cleaning fluid preparation system, a circulating cleaning system, a cleaning fluid temperature control system, an escape gas collection system, a neutralization and emission system, a tightness testing system, and a PLC control system. The cleaning fluid preparation system includes a chemical tank, a manual dosing port, a chemical suction device, a frequency converter, a metering pump, and a mixer. The chemical tank is mounted on the vehicle body, the manual dosing port is located at the top of the tank, a frequency converter is installed inside the tank, a metering pump is connected to the top of the tank, and the output of the chemical suction device is connected to the mixer. The water outlets converge and connect to the inside of the chemical tank. The mixing device is connected to cold water pipes and hot water pipes equipped with valves. The chemical tank is connected to the oil cooler via a circulating cleaning system. The chemical tank is equipped with a cleaning fluid temperature control system and a neutralization and discharge system. The escape gas collection system is located above the manual dosing port. The circulating cleaning system is connected to a tightness testing system. The cleaning fluid preparation system, circulating cleaning system, cleaning fluid temperature control system, escape gas collection system, neutralization and discharge system, and tightness testing system are controlled by a PLC control system. Although this chemical cleaning vehicle possesses the characteristics of multi-functional mobile chemical cleaning, it has some drawbacks and shortcomings when applied to different types of coolers.

[0006] 1. Limited Applicability: The design of this chemical cleaning vehicle may be more suitable for heat exchangers in industrial equipment, and not necessarily for various types of coolers in ship engine rooms. The shape and layout of coolers in ship engine rooms may differ from those in industrial equipment, therefore this chemical cleaning vehicle may not be compatible with the corresponding type of cooler.

[0007] 2. Size and weight of the equipment: The chemical cleaning vehicle is mobile, but it has many complex parts, which would make it bulky and take up a lot of space for ships with limited engine room space.

[0008] 3. Operational complexity: This cleaning vehicle contains multiple systems and control methods, requiring certain training and operation to function properly. The operational complexity may increase the difficulty for personnel to learn and use it.

[0009] In conclusion, although the chemical cleaning vehicle has certain versatility and mobility, it may have limitations and shortcomings in terms of adaptability, space occupation, operational complexity, and cleaning effect when cleaning various types of coolers in ship engine rooms. Summary of the Invention

[0010] To address the problems existing in the prior art, the present invention aims to provide a method for chemical cleaning of various types of coolers in ship engine rooms. This method includes a chemical cleaning device, inlet and outlet pipes for each cooler, and corresponding connecting hoses for the inlet and outlet pipes. The present invention directly utilizes the chemical cleaning device standardly configured on the ship's main engine. The inlet and outlet flange interfaces of the chemical cleaning device system are detachably connected to the inlet and outlet flange interfaces of each cooler via hoses. A suitable chemical cleaning agent is then circulated inside the cooler, achieving chemical cleaning without disassembling the cooler. After cleaning, the cooling efficiency of the cooler can be improved and its service life extended.

[0011] To achieve the above and other related objectives, the present invention adopts the following technical solution:

[0012] This invention provides a method for chemical cleaning of various types of coolers in ship engine rooms. Each cooler is equipped with an inlet valve, an outlet valve, and a venting device. The cooler's operating pipeline includes a medium outlet on the outlet pipeline and a medium inlet on the inlet pipeline. The chemical cleaning device's operating pipeline includes a chemical outlet on the outlet pipeline and a chemical inlet on the inlet pipeline. The method includes the following steps:

[0013] S1. Close the inlet and outlet valves of the cooler and drain the water from the cooler.

[0014] S2. Prepare the connection device. If this is the first connection, the piping of the cooler and chemical cleaning device needs to be modified:

[0015] The prepared connecting device includes a connecting hose with first interface flanges at both ends, and the connecting hose includes a first connecting hose, a second connecting hose, and an extension connecting hose;

[0016] If this is the first connection, the prepared connection device also includes a second interface flange that is detachably connected to the first interface flange and a blind flange for sealing the second interface flange in the non-cleaning state; the second interface flange is welded and fixed to the inlet pipe of the chemical cleaning device, the outlet pipe of the chemical cleaning device, the outlet valve downstream position of the cooler outlet pipe, and the inlet valve downstream position of the cooler inlet pipe, so that both the cooler and the chemical cleaning device are in a state where they can be detachably connected to the connecting hose; the second interface flange is retained on the chemical cleaning device and cooler pipes after installation for quick connection of the chemical cleaning device and cooler when the cooler needs to be cleaned next time;

[0017] S3. Connect the chemical cleaning device to the cooler using a connecting hose:

[0018] The chemical cleaning device's reagent outlet is connected to the cooler's medium outlet via a first connecting hose, and the chemical cleaning device's reagent inlet is connected to the cooler's medium inlet via a second connecting hose.

[0019] S4. Select a chemical cleaning agent according to the type of cooler, and fill the chemical cleaning device with the chemical cleaning agent;

[0020] S5. Following the operating instructions of the selected chemical cleaning agent, start the chemical cleaning device and perform circulating cleaning inside the cooler;

[0021] S6. After the circulation cleaning is completed, turn off the chemical cleaning pump and drain the chemical cleaning agent in the cooler;

[0022] S7. Remove all connecting hoses and use blind flanges to seal the second interface flanges on the chemical cleaning device (1) and cooler (3) pipelines respectively. Open the inlet valve and use cooling water to flush the inside of the cooler to complete the cleaning work. When not cleaning, keep the blind flanges installed and sealed.

[0023] As a preferred technical solution, the specific steps of step S1 are as follows: sequentially close the inlet valve on the inlet pipe of the cooler and the outlet valve on the outlet pipe of the cooler to temporarily disconnect the working system pipeline of the cooler, and drain the water in the cooler through the drain device of the cooler.

[0024] As a preferred technical solution, the specific steps of connecting the chemical cleaning device and the cooler with a connecting hose in step S3 are as follows:

[0025] The first interface flange at one end of the first connecting hose is detachably connected to the second interface flange on the outlet pipe of the chemical cleaning device standardly equipped on the main engine of the ship; the first interface flange at the other end of the first connecting hose is detachably connected to the second interface flange at the valve position on the outlet pipe of the cooler; the first interface flange at one end of the second connecting hose is detachably connected to the second interface flange at the valve position on the inlet pipe of the cooler; and the first interface flange at the other end of the second connecting hose is detachably connected to the second interface flange on the inlet pipe of the chemical cleaning device standardly equipped on the main engine of the ship.

[0026] As a preferred technical solution, in step S3, when the length of the first connecting hose or the length of the second connecting hose is less than the distance between the cooler and the chemical cleaning device, the total length of the connecting hose is increased by connecting an extension connecting hose after the first connecting hose, until the total length of the extended connecting hose can connect the cooler and the chemical cleaning device.

[0027] As a preferred technical solution, in step S5, the flow direction of the chemical cleaning agent during cleaning is opposite to the flow direction of the cooling medium when the cooler is working. The circulating flow direction of the chemical cleaning agent during cleaning is as follows: chemical cleaning device, chemical cleaning pump, chemical cleaning device agent outlet, cooler medium outlet, cooler, cooler medium inlet, chemical cleaning device agent inlet, and chemical cleaning device.

[0028] As a preferred technical solution, the specific steps of step S7 are as follows: disconnect the connecting hoses connecting the chemical cleaning device and the cooler, seal the second interface flange by installing a blind flange, open the inlet valve, and use the cooling water of the cooling system to flush the inside of the cooler until the residual chemical cleaning agent in the cooler is rinsed clean, thus completing the cleaning work.

[0029] As a preferred technical solution, the types of coolers include lubricating oil coolers, air coolers, tubular preheaters, plate coolers, and atmospheric condensers.

[0030] As described above, the present invention has the following beneficial effects:

[0031] (1) The present invention provides a method for chemical cleaning of various types of coolers in the engine room of a ship. After connecting the cooler to be cleaned to an existing chemical cleaning device through a hose and selecting a suitable chemical cleaning agent, it can be applied to the chemical cleaning of various types of coolers in the engine room of a ship. It is applicable to any type, specification and model of cooler, avoiding the limitation of the model and specification of cooler. The method of the present invention has a wide range of applications and strong adaptability.

[0032] (2) The present invention provides a method for chemical cleaning of various types of coolers in the engine room of a ship. The method can extend the connecting hose by splicing the flange interface according to the distance from the cooler to the existing chemical cleaning device, thereby avoiding the limitations of the small space in the ship's cabin and the distance of the fixed installation of the equipment.

[0033] (3) The present invention provides a method for chemical cleaning of various types of coolers in the engine room of ships, which does not require disassembly of the coolers and ensures the airtightness and integrity of the coolers.

[0034] (4) The present invention provides a method for chemical cleaning of various types of coolers in the engine room of ships. The operation is time-saving and labor-saving. Simply connect the cooler to be cleaned to the chemical cleaning device, select a suitable chemical cleaning agent, and follow the instructions to make the chemical cleaning agent circulate and clean in the cooler. This improves the cleaning efficiency and operating quality of the cooler and extends the service life of the cooler. Attached Figure Description

[0035] Figure 1This is a schematic diagram of the piping connection when the method of chemical cleaning of various types of coolers in the engine room of a ship is applied to the cooler at the No. 1 generator in the engine room of a ship.

[0036] Figure 2 This is a schematic diagram of the piping after adding a second interface flange to various types of coolers of the present invention.

[0037] Figure 3 This is a schematic diagram of the pipeline after adding a second interface flange to a tubular preheater according to the present invention.

[0038] Figure 4 This is a schematic diagram of the piping of a plate cooler after the addition of a second interface flange according to the present invention.

[0039] Figure 5 This is a schematic diagram of the piping of an atmospheric condenser after the addition of a second interface flange according to the present invention.

[0040] The specific reference numerals in the attached drawings are explained as follows: Chemical cleaning device 1, First connecting hose 21, Second connecting hose 22, Extension connecting hose 23, Cooler 3, Lubricating oil cooler 31, Air cooler 32, Tubular preheater 33, Plate cooler 34, Atmospheric condenser 35, Cooler inlet valve 4, Cooler outlet valve 5, First interface flange 61, Second interface flange 62, Main unit 7, Chemical cleaning pump 8, Generator cooler inlet valve 41, Generator cooler outlet valve 51, Tubular preheater inlet valve 42, Tubular preheater outlet valve 52, Plate cooler inlet valve 43, Plate cooler outlet valve 53, Atmospheric condenser inlet valve 44, Atmospheric condenser outlet valve 54. Detailed Implementation

[0041] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0042] In the description of this invention, it should be noted that the positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the positional relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of the embodiments of this invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific direction, and therefore should not be construed as a limitation of this invention.

[0043] Example 1

[0044] This embodiment provides a connection device for a method of chemical cleaning of various types of coolers in the engine room of a ship.

[0045] The ship's engine room is equipped with a cooler 3 and a chemical cleaning device 1. The types of coolers 3 include, but are not limited to, lubricating oil coolers 31, air coolers 32, tubular preheaters 33, plate coolers 34, and atmospheric condensers 35. Each cooler 3 includes an inlet valve 4, an outlet valve 5, and a venting device. The operating pipeline of the cooler includes a medium outlet a on the outlet pipeline and a medium inlet b on the inlet pipeline. The chemical cleaning device 1 is a standard configuration of the main engine 7 and does not require separate procurement. The operating pipeline of the chemical cleaning device includes a chemical outlet A on the outlet pipeline and a chemical inlet B on the inlet pipeline.

[0046] The connecting device includes a connecting hose with first interface flanges at both ends, a second interface flange that matches the first interface flange, and a standard blind flange for sealing the second interface flange in a non-cleaning state. The connecting hose includes a first connecting hose, a second connecting hose, and an extension connecting hose. The first interface flange and the second interface flange are both standard flange short pipes. The first interface flange is detachably connected to the second interface flange by bolts and nuts. Furthermore, the first interface flange can also be detachably connected to another first interface flange.

[0047] The second interface flange is welded and fixed to the inlet pipe of the chemical cleaning device, the outlet pipe of the chemical cleaning device, the outlet valve 5 on the cooler outlet pipe at the valve downstream position, and the inlet valve 4 on the cooler inlet pipe at the valve downstream position.

[0048] The chemical cleaning device 1's reagent outlet A is connected to the cooler 3's medium outlet a via a first connecting hose, and the chemical cleaning device 1's reagent inlet B is connected to the cooler 3's medium inlet b via a second connecting hose. The first interface flange at one end of the first connecting hose is connected to the second interface flange on the chemical cleaning device 1's outlet pipe, and the first interface flange at the other end of the first connecting hose is connected to the second interface flange at the valve downstream position of the cooler's outlet valve 5. At the same time, the first interface flange at one end of the second connecting hose is connected to the second interface flange on the chemical cleaning device 1's inlet pipe, and the first interface flange at the other end of the second connecting hose is connected to the second interface flange at the valve downstream position of the cooler's inlet valve 4.

[0049] When the distance between the cooler and the chemical cleaning device is greater than the first or second connecting hose, an extension connecting hose is connected to the first, second, or another extension connecting hose according to the length requirements on site, until the pipeline of the cooler and the pipeline of the chemical cleaning device are connected. The length of the extended connecting hose is sufficient to connect the chemical cleaning device to the cooler furthest from the chemical cleaning device in the engine room.

[0050] After the cooler is connected to the chemical cleaning device, the chemical cleaning agent is circulated inside the cooler to achieve the purpose of chemical cleaning without disassembling the cooler.

[0051] Example 2

[0052] like Figure 2 As shown, this embodiment provides a method for chemical cleaning of various types of coolers in the engine room of a ship, and the specific method steps are described when applied to the cooler at the generator in the engine room of a ship.

[0053] The ship's engine room is equipped with a chemical cleaning device 1, which is standardly equipped with the main engine 7. The chemical cleaning device 1 is equipped with a chemical cleaning pump 8. The operating pipeline of the chemical cleaning device 1 includes a chemical outlet A on the outlet pipeline and a chemical inlet B on the inlet pipeline. When the chemical cleaning device 1 is in operation, the chemical cleaning agent used in the chemical cleaning device 1 flows in the following direction: chemical inlet B → chemical cleaning device 1 → chemical cleaning pump 8 → chemical outlet A.

[0054] The cooler at the generator in the ship's engine room includes an oil cooler 31 and an air cooler 32 connected in series, and is equipped with a generator cooler inlet valve 41, a generator cooler outlet valve 51, and a venting device. The operating pipeline of the generator cooler includes a medium outlet a1 on the outlet pipeline and a medium inlet b1 on the inlet pipeline. When the cooler at the generator is in operation, the flow direction of the cooling medium at the No. 1 generator is: generator cooler medium inlet b1 → oil cooler 31 → air cooler 32 → generator cooler medium outlet a1.

[0055] The specific steps of the method include,

[0056] S1. Close the inlet valve 4 and outlet valve 5 of the cooler to be cleaned, and drain the water from the cooler:

[0057] The generator cooler inlet valve 41 on the inlet pipe of the lubricating oil cooler 31 and the generator cooler outlet valve 51 on the outlet pipe are closed to temporarily isolate the working system pipeline of the cooler during the cleaning process, and the water in the cooler is drained through the venting device of the lubricating oil cooler 31 and the air cooler 32.

[0058] S2. Prepare the connecting hoses, ensuring that the cooler at the generator and chemical cleaning device 1 are ready for connection:

[0059] Prepare at least two connecting hoses with first interface flanges 61 at both ends. The connecting hoses include a first connecting hose 21, a second connecting hose 22, and an extension connecting hose 23. When the distance between the cooler and the chemical cleaning device 1 is greater than the first connecting hose 21 or the second connecting hose 22, it is necessary to extend the connection by using the extension connecting hose 23 until the chemical cleaning device 1 and the cooler are connected.

[0060] Before the initial connection, a second interface flange 62 that can be detachably connected to the first interface flange 61 and a blind flange for sealing the second interface flange 62 in the non-cleaning state are also required. The second interface flange 62 is welded and fixed to the inlet pipe of the chemical cleaning device 1, the outlet pipe of the chemical cleaning device 1, the outlet valve 51 of the generator cooler outlet pipe, and the inlet valve 41 of the generator cooler inlet pipe, so that the generator cooler and the chemical cleaning device 1 are in a state of detachable connection with the connecting hose. The second interface flange 62 is retained on the chemical cleaning device 1 and the cooler after installation, and can be used to quickly connect the chemical cleaning device 1 and the cooler when the cooler needs to be cleaned next time.

[0061] S3. Connect the chemical cleaning device 1 to the required cleaning cooler using a connecting hose:

[0062] When in use, the chemical cleaning device 11's agent outlet A is connected to the generator cooler medium outlet a1 via the first connecting hose 21, and the chemical cleaning device 11's agent inlet B is connected to the generator cooler medium inlet b1 via the second connecting hose 22. One end of the first connecting hose 21 is detachably connected to the interface on the outlet pipe of the chemical cleaning device 1, which is standardly equipped with the main engine 7 of the ship, and the other end of the first connecting hose 21 is detachably connected to the interface at the valve position on the cooler outlet pipe. One end of the second connecting hose 22 is detachably connected to the interface at the valve position on the cooler inlet pipe, and the other end of the second connecting hose 22 is detachably connected to the interface on the inlet pipe of the chemical cleaning device 1, which is standardly equipped with the main engine 7 of the ship.

[0063] In this embodiment, the distance between the generator cooler and the chemical cleaning device 1 is greater than the second connecting hose 22. Therefore, after connecting the first interface flange 61 at one end of the second connecting hose 22 to the second interface flange 62 provided on the inlet pipe of the chemical cleaning device 1, the first interface flange 61 at the other end of the second connecting hose 22 is connected to the first interface flange 61 at one end of the extension connecting hose 23. At the same time, the first interface flange 61 at the other end of the extension connecting hose 23 is connected to the second interface flange 62 provided at the valve downstream position of the generator cooler inlet valve 41.

[0064] S4. Select the chemical cleaning agent and fill chemical cleaning device 1:

[0065] Select a suitable chemical cleaning agent for use with the oil cooler 31 and the air cooler 32, and fill the chemical cleaning device 1 with the chemical cleaning agent.

[0066] S5. According to the operating instructions of the selected chemical cleaning agent, start the chemical cleaning device 1 and perform circulating cleaning inside the cooler. During cleaning, the flow direction of the chemical cleaning agent is opposite to the flow direction of the cooling medium when the cooler is working. Specifically, the flow direction of the chemical cleaning agent during cleaning is as follows: chemical cleaning device 1 → chemical cleaning pump 8 → chemical cleaning device 1 outlet A → generator cooler outlet a1 → air cooler 32 → lubricating oil cooler 31 → generator cooler inlet b1 → chemical cleaning device 1 inlet B → chemical cleaning device 1.

[0067] S6. After the circulation cleaning is completed, turn off the chemical cleaning pump 8 and drain the chemical cleaning agent in the cooler.

[0068] S7. Disconnect the connecting hoses between the chemical cleaning device 1 and the cooler. Install the blind flange onto the second interface flange 62 on both the chemical cleaning device 1 and cooler pipelines using bolts. This ensures a tight seal at the second interface flange 62. Open the inlet valve and use the cooling water from the cooler's cooling system to flush the inside of the cooler until all residual chemical cleaning agents are removed, completing the cleaning process. In non-cleaning conditions, keep the blind flange installed and sealing the second interface flange 62 at all times.

[0069] Example 3

[0070] The specific method steps in Example 2 can also be applied to the tubular preheater 33, the plate cooler 34, and the atmospheric condenser 35.

[0071] like Figure 3 As shown, the operating pipeline of the tubular preheater 33 includes a medium outlet a2 on the outlet pipeline and a medium inlet b2 on the inlet pipeline. When the tubular preheater 33 is in operation, the flow direction of the cooling medium at the tubular preheater 33 is: tubular preheater medium inlet b2 → tubular preheater 33 → tubular preheater medium outlet a2.

[0072] When the specific method steps in Embodiment 2 are applied to the tubular preheater 33, in step S2, the second interface flange 62 is welded and fixed to the downstream position of the outlet valve 52 on the outlet pipeline of the tubular preheater 33 and the downstream position of the inlet valve 42 on the inlet pipeline of the tubular preheater 33. After connecting the tubular preheater 33 and the chemical cleaning device 1 through the connecting hose, the flow direction of the chemical cleaning agent during the working process is as follows: chemical cleaning device 1 → chemical cleaning pump 8 → chemical cleaning device 1 outlet A → tubular preheater medium outlet a2 → tubular preheater 33 → tubular preheater medium inlet b2 → chemical cleaning device 1 inlet B → chemical cleaning device 1.

[0073] like Figure 4 As shown, the operating pipeline of the plate cooler 34 includes a medium outlet a3 on the outlet pipeline and a medium inlet b3 on the inlet pipeline. When the plate cooler 34 is in operation, the flow direction of the cooling medium at the plate cooler 34 is: plate cooler medium inlet b3 → plate cooler 34 → plate cooler medium outlet a3.

[0074] When the specific method steps in Embodiment 2 are applied to the plate cooler 34, in step S2, the second interface flange 62 is welded and fixed to the downstream position of the outlet valve 53 on the outlet pipe of the plate cooler 34 and the downstream position of the inlet valve 43 on the inlet pipe of the plate cooler 34. After connecting the plate cooler 34 and the chemical cleaning device 1 through the connecting hose, the flow direction of the chemical cleaning agent during the working process is as follows: chemical cleaning device 1 → chemical cleaning pump 8 → chemical cleaning device 1 outlet A → plate cooler medium outlet a3 → plate cooler 34 → plate cooler medium inlet b3 → chemical cleaning device 1 inlet B → chemical cleaning device 1.

[0075] like Figure 5 As shown, the operating pipeline of the atmospheric condenser 35 includes a medium outlet a4 on the outlet pipeline and a medium inlet b4 on the inlet pipeline. When the atmospheric condenser 35 is in operation, the flow direction of the cooling medium at the atmospheric condenser 35 is: atmospheric condenser medium inlet b4 → atmospheric condenser 35 → atmospheric condenser medium outlet a4.

[0076] When the specific method steps in Example 2 are applied to the atmospheric condenser 35, in step S2, the second interface flange 62 is welded and fixed to the downstream position of the outlet valve 55 on the outlet pipeline of the atmospheric condenser 35 and the downstream position of the inlet valve 45 on the inlet pipeline of the atmospheric condenser 35. After connecting the atmospheric condenser 35 and the chemical cleaning device 1 through the connecting hose, the flow direction of the chemical cleaning agent during the working process is as follows: chemical cleaning device 1 → chemical cleaning pump 8 → chemical cleaning device 1 outlet A → atmospheric condenser medium outlet a4 → atmospheric condenser 35 → atmospheric condenser medium inlet b4 → chemical cleaning device 1 inlet B → chemical cleaning device 1.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art can make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this invention.

Claims

1. A method for chemical cleaning of various types of coolers in a ship's engine room, wherein a cooler (3) and a chemical cleaning device (1) are installed in the ship's engine room, each cooler (3) is provided with an inlet valve (4), an outlet valve (5), and a venting device, the operating pipeline of the cooler (3) includes a medium outlet on the outlet pipeline and a medium inlet on the inlet pipeline, and the operating pipeline of the chemical cleaning device (1) includes a reagent outlet on the outlet pipeline and a reagent inlet on the inlet pipeline, characterized in that, Includes the following steps: S1. Close the inlet valve (4) and outlet valve (5) of the cooler (3) to drain the water in the cooler (3); S2. Prepare the connection device. If it is the first connection, modify the piping of the cooler (3) and the chemical cleaning device (1): The prepared connection device includes a connecting hose with first interface flanges (61) at both ends. The connecting hose includes a first connecting hose (21), a second connecting hose (22), and an extension connecting hose (23). If this is the first connection, the prepared connection device also includes a second interface flange (62) that is detachably connected to the first interface flange (61) and a blind flange for sealing the second interface flange (62) in the non-cleaning state; the second interface flange (62) is welded and fixed to the inlet pipe of the chemical cleaning device (1), the outlet pipe of the chemical cleaning device (1), the outlet valve (5) of the cooler (3) outlet pipe, and the inlet valve (4) of the cooler (3) inlet pipe, so that both the cooler (3) and the chemical cleaning device (1) are in a state where they can be detachably connected to the connecting hose; the second interface flange (62) is retained on the chemical cleaning device (1) and the cooler (3) pipe after installation, for quick connection of the chemical cleaning device (1) and the cooler (3) when the cooler (3) needs to be cleaned next time; S3. Connect the chemical cleaning device (1) to the cooler (3) using a connecting hose: The chemical cleaning device (1)'s reagent outlet A is connected to the cooler (3)'s medium outlet via the first connecting hose (21), and the chemical cleaning device (1)'s reagent inlet is connected to the cooler (3)'s medium inlet via the second connecting hose (22). S4. Select a chemical cleaning agent according to the type of cooler (3) and fill the chemical cleaning device (1) with the chemical cleaning agent; S5. According to the operating instructions of the selected chemical cleaning agent, start the chemical cleaning device (1) and perform circulating cleaning inside the cooler (3); S6. After the circulation cleaning is completed, turn off the chemical cleaning pump (8) and drain the chemical cleaning agent in the cooler (3); S7. Remove all connecting hoses, and use blind flanges to seal the second interface flanges (62) on the chemical cleaning device (1) and cooler (3) pipelines respectively. Open the inlet valve (4) and use cooling water to flush the inside of the cooler (3) clean to complete the cleaning work. When not cleaning, keep the blind flanges installed and sealed.

2. The method for chemical cleaning of various types of coolers in a ship's engine room according to claim 1, characterized in that, The specific steps of step S1 are as follows: sequentially close the inlet valve (4) on the inlet pipe of the cooler (3) and the outlet valve (5) on the outlet pipe of the cooler (3) to temporarily disconnect the working system pipeline of the cooler (3) and drain the water in the cooler (3) through the drain device of the cooler (3).

3. The method for chemical cleaning of various types of coolers in a ship's engine room according to claim 1, characterized in that, The specific steps for connecting the chemical cleaning device (1) and the cooler (3) with the connecting hose in step S3 are as follows: The first interface flange (61) at one end of the first connecting hose (21) is detachably connected to the second interface flange (62) on the outlet pipe of the chemical cleaning device (1) that is standardly equipped on the main engine (7) of the ship; the first interface flange (61) at the other end of the first connecting hose (21) is detachably connected to the second interface flange (62) at the valve position on the outlet pipe of the connecting cooler (3); The first interface flange (61) at one end of the second connecting hose (22) is detachably connected to the second interface flange (62) at the valve position on the inlet pipe of the cooler (3); The first interface flange (61) at the other end of the second connecting hose (22) can be detachably connected to the second interface flange (62) on the inlet pipe of the chemical cleaning device (1) that is standardly equipped on the main engine (7) of the ship.

4. The method for chemical cleaning of various types of coolers in a ship's engine room according to claim 1, characterized in that, In step S3, when the length of the first connecting hose (21) or the length of the second connecting hose (22) is less than the distance between the cooler (3) and the chemical cleaning device (1), the total length of the connecting hose is increased by connecting an extension connecting hose (23) after the first connecting hose until the total length of the extended connecting hose can connect the cooler (3) and the chemical cleaning device (1).

5. A method for chemical cleaning of various types of coolers in a ship's engine room according to claim 1, characterized in that, In step S5, the flow direction of the chemical cleaning agent during cleaning is opposite to the flow direction of the cooling medium when the cooler (3) is working. The circulation flow direction of the chemical cleaning agent during cleaning is as follows: chemical cleaning device (1), chemical cleaning pump (8), chemical cleaning device (1) agent outlet, cooler (3) medium outlet, cooler (3), cooler (3) medium inlet, chemical cleaning device (1) agent inlet, chemical cleaning device (1).

6. A method for chemical cleaning of various types of coolers in a ship's engine room according to claim 1, characterized in that, The specific steps of step S7 are as follows: disconnect the connecting hoses connecting the chemical cleaning device (1) and the cooler (3), seal the second interface flange (62) by installing the blind flange, open the inlet valve (4), and use the cooling water of the cooling system to which the cooler (3) belongs to flush the inside of the cooler (3) until the residual chemical cleaning agent in the cooler (3) is rinsed clean, and the cleaning work is completed.

7. A method for chemical cleaning of various types of coolers (3) in the engine room of a ship, according to any one of claims 1-6, characterized in that, The types of coolers (3) include oil coolers (31), air coolers (32), tubular preheaters (33), plate coolers (34), and atmospheric condensers (35).

Images