A device and method for preventing pollution and corrosion of cooling pipes of ships and marine engineering

Abstract

The present invention relates to an anti-fouling and anti-corrosion device and method for ship and marine engineering cooling pipelines, including a fresh water supply pipe, a sea water supply pipe, a heat exchanger, a forward water inlet pipe, a forward water outlet pipe, a reverse water inlet pipe and a reverse water outlet pipe. When the ship and the marine engineering are working, conventional forward delivery of sea water can be adopted to realize cooling and cooling of electromechanical equipment. By innovatively delivering sea water in the forward and reverse directions alternately, forward flushing and reverse flushing of silt and sediment in the pipeline can be realized. When the ship and the marine engineering are not working, compressed air is used for forward and reverse blowing and fresh water is used to discharge the sea water and debris retained in the heat exchanger and the cooling pipeline, which greatly reduces the concentration of residual sea water in the fresh water after replenishing fresh water, blows out fine debris in the pipeline, greatly reduces the amount of fresh water used, and retains fresh water to soak the cooling pipeline, so that marine organisms lose their growth environment, reduce the accumulation and attachment of marine organisms in the pipeline, and prolong the service life of the cooling system.

Description

Technical Field

[0001] The present invention relates to the technical field of ship and marine engineering cooling systems, and in particular to an anti-fouling and anti-corrosion device and method for ship and marine engineering cooling pipelines. Background Art

[0002] Ship and marine engineering cooling pipes usually use open seawater circulation to remove excess heat generated by equipment operation, providing protection for the normal operation of core equipment such as power equipment and air conditioning in ships and marine engineering. However, when seawater is used as a cooling medium, the silt and marine organisms contained in the seawater will enter the pipes along with the seawater and quickly attach and grow on the inner wall of the pipe. As time goes by, more and more sediments and marine organisms attach to the inner wall of the pipe, which not only directly affects the cooling flow and the heat exchange capacity of the cooling system, resulting in reduced equipment operating efficiency and increased energy consumption, but in severe cases, it may even block the equipment heat exchanger, causing shutdowns and affecting the safe operation of ships and marine engineering. In addition, the attachment of marine organisms can also cause biological corrosion of the pipeline. Regular cleaning requires a lot of manpower and financial resources, and the maintenance cost is high.

[0003] There are usually two types of anti-marine growth devices. The first type is the copper-aluminum electrode anti-marine growth device, which embeds copper and aluminum electrode rods on the top of the seabed valve box and uses a constant current control module to decompose the electrode rods in the seawater valve box to produce anti-fouling and anti-corrosion ions and distribute them to the entire seawater cooling pipe system, thereby reducing and preventing biological corrosion and electrochemical corrosion caused by the attachment of marine organisms in the seawater pipeline. However, the device needs to be powered on all the time when working, and the copper-aluminum electrodes are disposable consumables that must be replaced regularly during their service life. They are also installed underwater, making maintenance difficult and costly.

[0004] The second type is the ultrasonic anti-marine growth device, which emits ultrasonic pulses from an ultrasonic generator installed on the surface of the pipe or equipment, and continuously oscillates to produce alternating positive and negative pressure modes, that is, when positive pressure is applied, the tiny bubbles generated during the negative pressure period will burst, making it impossible for marine organisms to adhere to the pipe wall. The strong ultrasonic sound field can also disperse, crush, and kill marine organisms, so that they cannot accumulate in the cooling system. This device is expensive, needs to be operated continuously for 24 hours, and consumes a lot of energy.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In view of the deficiencies in the prior art, an embodiment of the present invention discloses an anti-fouling and anti-corrosion device and method for cooling pipes of ships and marine engineering, so as to solve the problems that the anti-fouling and anti-corrosion devices are difficult to use and maintain and have high costs.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A device for preventing fouling and corrosion of cooling pipes of ships and marine engineering, comprising: a fresh water supply pipe, wherein fresh water is input into the fresh water supply pipe, and a first valve body is arranged on the fresh water supply pipe; a sea water supply pipe, wherein external sea water is input into the sea water supply pipe, and a second valve body is arranged on the sea water supply pipe; a heat exchanger, wherein the heat exchanger has an inlet and an outlet; a forward water inlet pipe, wherein the first end of the forward water outlet pipe is connected to the second end of the sea water supply pipe and the second end of the fresh water supply pipe, and the second end is connected to the inlet; and a forward water outlet pipe, wherein the first end of the forward water outlet pipe is connected to the outlet, and the second end is connected to external sea water.

[0009] A reverse water inlet pipe, the first end of which is connected to the second end of the seawater water supply pipe and the second end of the freshwater water supply pipe, and the second end of which is connected to the forward water outlet pipe; a reverse water outlet pipe, the first end of which is connected to the forward water inlet pipe, and the second end of which is connected to external seawater; a third valve body, having two valve bodies, one of which is arranged on the forward water inlet pipe and located at the front end of the first end of the reverse water outlet pipe, and the other is arranged on the forward water outlet pipe and located between the rear end of the second end of the reverse water inlet pipe and the front end of the second end of the reverse water outlet pipe; a fourth valve body, having two valve bodies, one of which is arranged on the reverse water inlet pipe, and the other is arranged on the reverse water outlet pipe;

[0010] The first valve body, the second valve body, the third valve body and the fourth valve body are opened, the fresh water supply pipe inputs fresh water, and the fresh water discharges the seawater retained in all the pipes and soaks all the pipes.

[0011] A further technical solution is that the anti-fouling and anti-corrosion device for ship and marine engineering cooling pipes also includes: an air intake pipe, which inputs compressed air, and a tenth valve body is arranged on the air intake pipe; wherein the first end of the forward water inlet pipe is connected to the second end of the air intake pipe, and the first end of the reverse water inlet pipe is connected to the second end of the air intake pipe.

[0012] Its further technical solution is that the heat exchanger, forward water inlet pipe, forward water outlet pipe, reverse water inlet pipe and reverse water outlet pipe have multiple groups; the second end of the fresh water supply pipe is connected to multiple groups of fresh water supply branches, the first valve body is arranged on the fresh water supply branch, the first end of the forward water inlet pipe and the first end of the reverse water inlet pipe are connected to the second end of the fresh water supply branch; the second end of the seawater supply pipe is connected to multiple groups of seawater supply branches, the second valve body is arranged on the seawater supply branch, the first end of the forward water inlet pipe and the first end of the reverse water inlet pipe are connected to the second end of the seawater supply branch; the second end of the air inlet pipe is connected to multiple groups of air inlet branches, the tenth valve body is arranged on the air inlet branch, the first end of the forward water inlet pipe and the first end of the reverse water inlet pipe are connected to the second end of the air inlet branch.

[0013] Its further technical solution is that the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: two cooling water pumps, one for use and one for backup, which are arranged in parallel on the seawater supply pipe; the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: a sixth valve body, which is arranged on the seawater supply pipe and is located at the front end of each of the cooling water pumps; the seventh valve body, which is a stop check valve, is arranged on the seawater supply pipe and is located at the rear end of each of the cooling water pumps.

[0014] Its further technical solution is that the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: a fifth valve body, which is arranged on the seawater supply pipe and is located at the front end of the cooling water pump; an eighth valve body, which is a stop check valve, is arranged at the second end of the fresh water supply pipe; a ninth valve body, which is a stop check valve, is arranged at the second end of the forward water outlet pipe; and an eleventh valve body, which is a stop check valve, is arranged at the second end of the air inlet pipe.

[0015] A further technical solution is that the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: a controller, which is electrically connected to the first valve body, the second valve body, the third valve body, the fourth valve body, the tenth valve body and the cooling water pump.

[0016] A further technical solution is that the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: an alarm, which is electrically connected to the controller.

[0017] The method of applying the aforementioned anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering is automatically operated by a controller, comprising the following steps:

[0018] Forward cooling of cooling pipe: open the second valve body and the third valve body, close the first valve body and the fourth valve body, the seawater supply pipe inputs external seawater, the seawater passes through the forward water inlet pipe, enters from the inlet, exchanges heat in the heat exchanger, and then enters the forward water outlet pipe from the outlet to be discharged from the ship and marine engineering;

[0019] Reverse flushing of cooling pipes: close the third valve body, open the fourth valve body, and allow seawater to pass through the reverse water inlet pipe, enter from the outlet, exchange heat in the heat exchanger, and then enter the reverse water outlet pipe from the inlet to be discharged from ships and marine engineering;

[0020] Fresh water soaking of cooling pipes: When the ship and the marine engineering are not in operation, the first valve body, the second valve body, the third valve body and the fourth valve body are opened, and the fresh water supply pipe inputs fresh water, and the fresh water discharges the seawater retained in all the pipes and soaks all the pipes.

[0021] Its further technical solution is that the method comprises the following steps:

[0022] Forward cooling of cooling pipe: open the second valve body and the third valve body, close the first valve body and the fourth valve body, the seawater supply pipe inputs external seawater, the seawater passes through the forward water inlet pipe, enters from the inlet, exchanges heat in the heat exchanger, and then enters the forward water outlet pipe from the outlet to be discharged from the ship and marine engineering;

[0023] Reverse flushing of cooling pipes: close the third valve body, open the fourth valve body, and allow seawater to pass through the reverse water inlet pipe, enter from the outlet, exchange heat in the heat exchanger, and then enter the reverse water outlet pipe from the inlet to be discharged from ships and marine engineering;

[0024] Compressed air purging of cooling pipes: when the ship and the offshore engineering are not in operation, the tenth valve body is opened, the air inlet pipe inputs compressed air to purge and discharge the seawater in the reverse water inlet pipe and the reverse water outlet pipe, and the tenth valve body is closed after the seawater is discharged from the ship and the offshore engineering; the fourth valve body is closed, the third valve body and the tenth valve body are opened, the air inlet pipe inputs compressed air to purge and discharge the seawater in the forward water inlet pipe and the forward water outlet pipe, and the tenth valve body is closed after the seawater is discharged from the ship and the offshore engineering;

[0025] Fresh water soaking of cooling pipes: the first valve body, the second valve body, the third valve body and the fourth valve body are opened, and fresh water is input into the fresh water supply pipe, and the fresh water discharges the seawater retained in all pipes and soaks all pipes.

[0026] The beneficial effects of the embodiments of the present invention are as follows:

[0027] (1) The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering of the present invention includes a fresh water supply pipe, a sea water supply pipe, an air intake pipe, a heat exchanger, a forward water inlet pipe and a forward water outlet pipe, a reverse water inlet pipe, a reverse water outlet pipe, a third valve body, a fourth valve body and a tenth valve body. By opening the second valve body and the third valve body and closing the first valve body and the fourth valve body, the cooling water pump pumps sea water, and the sea water supply pipe forwardly transports sea water to achieve cooling of electromechanical equipment. By opening the fourth valve body and closing the third valve body, the sea water supply pipe alternately transports sea water in the forward and reverse directions to achieve forward and reverse flushing of silt and sediment in the pipeline. By opening the tenth valve body and the fourth valve body and closing the third valve body and the cooling water pump, compressed air is reversely purged and the tenth valve body and the third valve body are opened and the fourth valve body is closed to forwardly purge the remaining sea water in the cooling water pipe. And by opening the first valve body, the second valve body, the third valve body and the fourth valve body to send fresh water into the forward water inlet pipe, the forward water outlet pipe, the reverse water inlet pipe and the reverse water outlet pipe, the seawater retained in the pipe is further discharged and the fresh water is retained to soak the pipe body, so that the marine organisms lose their growth environment, and finally the fresh water and the marine organisms are discharged from the hull and the marine engineering, reducing the accumulation and attachment of the marine organisms in the pipeline, and ensuring the heat exchange effect of the cooling system of the ship and the marine engineering. The device is simple to install, convenient to maintain and low in cost.

[0028] (ii) Furthermore, since direct fresh water replenishment cannot completely discharge seawater, fresh water will mix with seawater, the amount of fresh water used is large and the concentration of seawater in fresh water is high, so the soaking effect is limited. After the cooling pipeline is reversely flushed and before fresh water is replenished, the cooling pipeline is purged with compressed air, which can discharge the seawater remaining in the cooling pipeline, further purge the fine debris in the pipeline, reduce the concentration of residual seawater in the fresh water after fresh water replenishment, and greatly reduce the amount of fresh water used, further improve the fresh water soaking effect, greatly reduce costs and be more environmentally friendly. At the same time, the reverse pipeline and the forward pipeline are purged in turn, the purge effect is better and the energy consumption is lower.

[0029] (III) Further, the heat exchanger, the forward water inlet pipe, the forward water outlet pipe, the reverse water inlet pipe and the reverse water outlet pipe have multiple groups, and each group has corresponding fresh water supply branch pipes and sea water supply branch pipes. The recoil intensity is controlled by the number of simultaneous openings and closings of the second valve body, that is, multiple heat exchangers and their reverse cooling pipelines are selected to recoil one by one or in groups to recoil group by group, so as to ensure the recoil effect of the heat exchanger and the cooling pipeline.

[0030] (IV) Furthermore, when ships and marine engineering are operating, seawater can be transported alternately in the forward and reverse directions to backwash the silt and sediment in the pipes while cooling the equipment. When ships and marine engineering are not operating, compressed air can be used for forward and reverse blowing and fresh water can be used to discharge the seawater remaining in the heat exchanger and cooling pipes, and fresh water can be retained to soak the cooling pipes, so that marine organisms lose their growth environment and reduce the accumulation and attachment of marine organisms in the pipes. The method of the present invention can more comprehensively remove silt, sediment and marine organisms in the cooling pipes of ships and marine engineering, and the cooling system has a long service life. The method does not require continuous operation of the device, is energy-saving and environmentally friendly, and is automatically operated by a controller with a high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic structural diagram of an anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering.

[0032] Figure 2 The present invention is a schematic structural diagram of a ship and marine engineering cooling pipe anti-fouling and anti-corrosion device having multiple groups of heat exchangers.

[0033] Figure 3 The present invention is a connection diagram of a controller in an anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering.

[0034] In the figure:

[0035] 1. Fresh water supply pipe; 11. Fresh water supply branch pipe; 12. First valve body; 13. Eighth valve body; 2. Sea water supply pipe; 21. Fifth valve body; 22. Sea water supply branch pipe; 23. Second valve body; 31. Forward water inlet pipe; 32. Forward water outlet pipe; 33. Third valve body; 34. Ninth valve body; 41. Reverse water inlet pipe; 42. Reverse water outlet pipe; 43. Fourth valve body; 5. Heat exchanger; 51. Inlet; 52. Outlet; 6. Cooling water pump; 61. Sixth valve body; 62. Seventh valve body; 7. Controller; 8. Alarm; 9. Air intake pipe; 91. Tenth valve body; 92. Eleventh valve body; 93. Air intake branch pipe. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0037] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0038] In the present invention, the first end is the end close to the water inlet direction of the fresh water supply pipe 1, the end close to the water inlet direction of the sea water supply pipe 2, and the end close to the air inlet direction of the air inlet pipe 9, and the second end is the end close to the water outlet direction of the forward outlet pipe 32. Figure 1 For example, the first end of the fresh water supply pipe 1 is the upper end, and the second end of the forward water outlet pipe 32 is the lower end.

[0039] First embodiment:

[0040] This embodiment discloses an anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering.

[0041] like Figure 1 As shown, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering includes a fresh water supply pipe 1, a sea water supply pipe 2, a heat exchanger 5, a forward water inlet pipe 31 and a forward water outlet pipe 32. The fresh water supply pipe 1 inputs fresh water, and a first valve body 12 is arranged on the fresh water supply pipe 1. The sea water supply pipe 2 inputs external sea water, and a second valve body 23 is arranged on the sea water supply pipe 2. The heat exchanger 5 has an inlet 51 and an outlet 52. The first end of the forward water inlet pipe 31 is connected to the second end of the sea water supply pipe 2 and the second end of the fresh water supply pipe 1, and the second end of the forward water inlet pipe 31 is connected to the inlet 51. The first end of the forward water outlet pipe 32 is connected to the outlet 52, and the second end of the forward water outlet pipe 32 is connected to the external sea water. Exemplarily, the first end of the fresh water supply pipe 1 is connected to the fresh water tank or pressure water tank on the ship and the marine engineering, and the fresh water supply pressure is 0.2~0.4Mpa, which is greater than the flow resistance of the seawater pipeline and meets the requirements of discharging the seawater in the forward water inlet pipe 31 and the forward water outlet pipe 32. The first end of the seawater supply pipe 2 is connected to the colder seawater outside.

[0042] like Figure 1As shown, further, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes a cooling water pump 6, which is arranged on the seawater supply pipe 2, and the cooling water pump 6 provides seawater delivery pressure. Preferably, there are two cooling water pumps 6, one for use and one for backup, which are arranged in parallel. The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes a sixth valve body 61 and a seventh valve body 62. The sixth valve body 61 is a manual gate valve, which is arranged on the seawater supply pipe 2 and is located at the front end of each cooling water pump 6. The seventh valve body 62 is a manual stop check valve, which is arranged on the seawater supply pipe 2 and is located at the rear end of each cooling water pump 6. When one of the cooling water pumps 6 needs to be overhauled, the sixth valve body 61 and the seventh valve body 62 on both sides thereof are manually closed, and the sixth valve body 61 and the seventh valve body 62 on both sides of the other cooling water pump 6 are opened to ensure that the seawater can be transported normally.

[0043] like Figure 1 As shown, further, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes a fifth valve body 21. The fifth valve body 21 is a manual gate valve, which is arranged on the seawater supply pipe 2 and is located at the front end of the cooling water pump 6 to control the on-off of the entire seawater supply pipe 2. The fifth valve body 21 is normally open in all working conditions.

[0044] like Figure 1 As shown, further, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes an eighth valve body 13 and a ninth valve body 34. The eighth valve body 13 is a stop check valve, which is arranged at the second end of the fresh water supply pipe 1 to prevent the backflow of seawater, fresh water and compressed air in each water inlet pipe into the fresh water supply pipe 1. The ninth valve body 34 is a stop check valve, which is arranged at the second end of the forward outlet pipe 32 to prevent the backflow of seawater after external heat exchange into the forward outlet pipe 32 and the reverse outlet pipe 42. The eighth valve body 13 and the ninth valve body 34 are normally open in all working conditions.

[0045] like Figure 1 and Figure 3 As shown, further, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes a controller 7, and the controller 7 is electrically connected to the first valve body 12, the second valve body 23 and the cooling water pump 6. In the present application, electrical connection refers to the form in which different components in the circuit are connected through physical lines such as PCB copper foil or wires that can transmit electrical signals. The controller 7 can use a commercially available PLC controller 7, and the control program is the existing technology.

[0046] like Figure 3 As shown, further, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering further includes an alarm 8, which is electrically connected to the controller 7. When the controller 7 detects that the valve body is damaged, the alarm 8 is controlled to alarm, indicating that the corresponding valve body needs to be repaired. The alarm 8 can be a module integrated on the controller 7.

[0047] In this embodiment, a fresh water supply pipe 1 is provided to transport fresh water, and a seawater supply pipe 2 is provided to transport external seawater. The first valve body 12 is closed and the second valve body 23 is opened to send external seawater into the heat exchanger 5 for heat exchange, thereby cooling the equipment, and the seawater after heat exchange is discharged from the hull and the marine engineering. The first valve body 12 and the second valve body 23 are opened to send fresh water into the forward water inlet pipe 31 and the forward water outlet pipe 32, and the seawater retained in the pipe is discharged and the fresh water is retained to soak the pipe body, so that the marine organisms lose their growth environment, and finally the fresh water and the marine organisms are discharged from the hull and the marine engineering, so as to achieve fresh water soaking of the cooling pipeline. The device is simple to install, convenient to maintain, and low in cost.

[0048] Second embodiment:

[0049] Based on the first embodiment, the second embodiment further optimizes and refines the cooling pipe anti-fouling and anti-corrosion device.

[0050] like Figure 1 As shown, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering further comprises an air inlet pipe 9 , into which compressed air is input, and a tenth valve body 91 is arranged on the air inlet pipe 9 .

[0051] Exemplarily, the first end of the air inlet pipe 9 is connected to a compressed air pump on a ship or marine engineering, and the compressed air pressure is 0.6-1 MPa. The first end of the forward water inlet pipe 31 is connected to the second end of the air inlet pipe 9. The controller 7 is electrically connected to the tenth valve body 91.

[0052] Furthermore, an eleventh valve body 92 is provided at the second end of the air inlet pipe 9 . The eleventh valve body 92 is a stop check valve to prevent seawater, fresh water, compressed air, etc. in each water inlet pipe from backflowing into the air inlet pipe 9 .

[0053] In this embodiment, after forward flushing, the cooling water pump 6 is turned off, the tenth valve body 91 is opened, and compressed air is input into the air intake pipe 9 to blow out the seawater in the forward water inlet pipe 31 and the forward water outlet pipe 32. After the seawater is discharged from the ship and marine engineering, the tenth valve body 91 is closed, so that the cooling pipeline can be purged and the seawater can be discharged.

[0054] Third embodiment:

[0055] Based on the second embodiment, the third embodiment further optimizes and refines the anti-fouling and anti-corrosion device for the cooling pipe.

[0056] like Figure 1 As shown, the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering further includes a reverse water inlet pipe 41 , a reverse water outlet pipe 42 , a third valve body 33 and a fourth valve body 43 .

[0057] The first end of the reverse water inlet pipe 41 is connected to the second end of the seawater supply pipe 2, the second end of the freshwater supply pipe 1 and the second end of the air inlet pipe 9, and the second end of the reverse water inlet pipe 41 is connected to the forward water outlet pipe 32. The first end of the reverse water outlet pipe 42 is connected to the forward water inlet pipe 31, and the second end of the reverse water outlet pipe 42 is connected to the external seawater. There are two third valve bodies 33, one of which is arranged on the forward water inlet pipe 31 and is located at the front end of the first end of the reverse water outlet pipe 42, and the other is arranged on the forward water outlet pipe 32 and is located between the rear end of the second end of the reverse water inlet pipe 41 and the front end of the second end of the reverse water outlet pipe 42. There are two fourth valve bodies 43, one of which is arranged on the reverse water inlet pipe 41, and the other is arranged on the reverse water outlet pipe 42. Specifically, the controller 7 is electrically connected to the third valve body 33 and the fourth valve body 43.

[0058] like Figure 2 As shown, preferably, the heat exchanger 5, the forward water inlet pipe 31, the forward water outlet pipe 32, the reverse water inlet pipe 41 and the reverse water outlet pipe 42 have multiple groups. The second end of the fresh water supply pipe 1 is connected to multiple groups of fresh water supply branches 11, the first valve body 12 is arranged on the fresh water supply branch pipe 11, and the forward water inlet pipe 31 and the reverse water inlet pipe 41 are connected to the second end of the fresh water supply branch pipe 11. The second end of the sea water supply pipe 2 is connected to multiple groups of sea water supply branches 22, the second valve body 23 is arranged on the sea water supply branch pipe 22, the forward water inlet pipe 31 and the reverse water inlet pipe 41 are connected to the second end of the sea water supply branch pipe 22. The second end of the air inlet pipe 9 is connected to multiple groups of air inlet branches 93, the tenth valve body 91 is arranged on the air inlet branch pipe 93, and the first end of the forward water inlet pipe 31 and the first end of the reverse water inlet pipe 41 are connected to the second end of the air inlet branch pipe 93.

[0059] In this embodiment, by adding a reverse water inlet pipe 41 and a reverse water outlet pipe 42, closing the third valve body 33 and opening the fourth valve body 43, seawater can reversely enter the heat exchanger 5 for heat exchange, while flushing away the silt and sediment in the pipe and discharging it outside the ship and marine engineering. Forward and reverse flushing are performed alternately, and the flushing effect is better, further ensuring the heat exchange effect and service life of the ship and marine engineering cooling system.

[0060] At the same time, the recoil intensity is controlled by the number of second valve bodies 23 opened and closed simultaneously, that is, multiple heat exchangers 5 and their reverse cooling pipelines are selected to recoil one by one or in groups to ensure the recoil effect of the heat exchanger 5 and the cooling pipeline.

[0061] Fourth embodiment:

[0062] This embodiment discloses a method for applying the aforementioned anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering, which is automatically operated by the controller 7 and includes the following steps:

[0063] Step S1, forward cooling of the cooling pipe: open the second valve body 23, close the first valve body 12, input external seawater through the seawater supply pipe 2, the seawater passes through the forward water inlet pipe 31, enters from the inlet 51, exchanges heat in the heat exchanger 5, and then enters the forward water outlet pipe 32 from the outlet 52, and is discharged from the ship and marine engineering.

[0064] Step S2, compressed air purging of cooling pipes: when the ship and the marine engineering are not in operation, the tenth valve body 91 is opened, and the air inlet pipe 9 inputs compressed air to purge and discharge the seawater in the forward water inlet pipe 31 and the forward water outlet pipe 32, and the tenth valve body 91 is closed after the seawater is discharged from the ship and the marine engineering.

[0065] Specifically, the purge time is calculated according to the total volume of the pipeline and the compressed gas flow rate, and the opening time of the tenth valve body 91 is controlled according to the purge time.

[0066] Step S3, soaking the cooling pipes in fresh water: open the first valve body 12 and the second valve body 23, input fresh water through the fresh water supply pipe 1, and the fresh water discharges the seawater remaining in all pipes and soaks all pipes.

[0067] Preferably, the fresh water replenishment time is calculated based on the total volume of the fresh water immersion pipeline and the fresh water replenishment flow rate, and the opening time of the first valve body 12 and the second valve body 23 is controlled according to the fresh water replenishment time. When the opening time reaches the fresh water replenishment time, the fresh water fills the pipeline and starts to soak. At this time, the first valve body 12 is closed to save fresh water resources. There is no time limit for soaking until the seawater of the ship and marine engineering resumes work and discharges the fresh water in the pipeline. In the steps of compressed air purging and fresh water soaking of the cooling pipeline, the cooling water pump 6 is turned off to stop conveying seawater.

[0068] In this embodiment, when ships and marine engineering are working, conventional forward delivery of seawater can be adopted to achieve cooling of electromechanical equipment. By using compressed air to purge the cooling pipeline, the seawater retained in the cooling pipeline can be discharged, the concentration of fresh water immersion can be increased, and the fresh water immersion effect can be further improved, which greatly reduces the amount of fresh water used, reduces costs and is more environmentally friendly. By retaining the cooling pipeline for fresh water immersion, marine organisms lose their growth environment, and reduce the accumulation and attachment of marine organisms in the pipeline. The method of this embodiment can more comprehensively remove silt, sediment and marine organisms in the cooling pipelines of ships and marine engineering, and the cooling system has a long service life. This method does not require continuous operation of the device, is energy-saving and environmentally friendly, and is automatically operated by a controller with a high degree of automation.

[0069] Fifth embodiment:

[0070] Based on the fourth embodiment, the fifth embodiment further optimizes and refines the fourth embodiment.

[0071] Step S1, forward cooling of the cooling pipe: open the second valve body 23 and the third valve body 33, close the first valve body 12 and the fourth valve body 43, the seawater supply pipe 2 inputs external seawater, the seawater passes through the forward water inlet pipe 31, enters from the inlet 51, exchanges heat in the heat exchanger 5, and then enters the forward water outlet pipe 32 from the outlet 52, and is discharged from the ship and marine engineering.

[0072] Step S2, reverse flushing of the cooling pipe: close the third valve body 33, open the fourth valve body 43, and the seawater passes through the reverse water inlet pipe 41, enters from the outlet 52, exchanges heat in the heat exchanger 5, and then enters the reverse water outlet pipe 42 from the inlet 51 to be discharged from the ship and marine engineering.

[0073] Step S3, compressed air purging of the cooling pipeline: when the ship and the marine engineering are not in operation, the tenth valve body 91 is opened, and the air inlet pipe 9 inputs compressed air to purge and discharge the seawater in the reverse water inlet pipe 41 and the reverse water outlet pipe 42, and the tenth valve body 91 is closed after the seawater is discharged from the ship and the marine engineering; the fourth valve body 43 is closed, the third valve body 33 and the tenth valve body 91 are opened, and the air inlet pipe 9 inputs compressed air to purge and discharge the seawater in the forward water inlet pipe 31 and the forward water outlet pipe 32, and the tenth valve body 91 is closed after the seawater is discharged from the ship and the marine engineering.

[0074] Step S4, soaking the cooling pipes in fresh water: open the first valve body 12, the second valve body 23, the third valve body 33 and the fourth valve body 43, input fresh water through the fresh water supply pipe 1, and the fresh water discharges the seawater retained in all pipes and soaks all pipes.

[0075] In this embodiment, when the ship and the marine engineering are in operation, the seawater can be transported alternately in the forward and reverse directions, and the equipment is cooled in the heat exchanger 5, and the silt and sediment in the pipeline are flushed forward and reversely, further improving the flushing effect. When the ship and the marine engineering are not in operation, compressed air is used for forward and reverse blowing and fresh water is used to discharge the seawater and small debris in the heat exchanger and the cooling pipeline, further improving the blowing effect.

[0076] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering, characterized in that: The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering includes: A fresh water supply pipe, wherein fresh water is input into the fresh water supply pipe, and a first valve body is arranged on the fresh water supply pipe; A seawater supply pipe, the seawater supply pipe inputs external seawater, and a second valve body is provided on the seawater supply pipe; a heat exchanger having an inlet and an outlet; a forward water inlet pipe, a first end of which is connected to the second end of the seawater supply pipe and the second end of the freshwater supply pipe, and a second end of which is connected to the inlet; A forward water outlet pipe, a first end of which is connected to the outlet and a second end of which is connected to external seawater; A reverse water inlet pipe, the first end of which is connected to the second end of the seawater supply pipe and the second end of the freshwater supply pipe, and the second end of which is connected to the forward water outlet pipe; A reverse water outlet pipe, the first end of which is connected to the forward water inlet pipe, and the second end of which is connected to external seawater; The third valve body has two parts, one of which is arranged on the forward water inlet pipe and located at the front end of the first end of the reverse water outlet pipe, and the other is arranged on the forward water outlet pipe and located between the rear end of the second end of the reverse water inlet pipe and the front end of the second end of the reverse water outlet pipe; There are two fourth valve bodies, one of which is arranged on the reverse water inlet pipe and the other is arranged on the reverse water outlet pipe; An air inlet pipe, wherein the air inlet pipe inputs compressed air, a tenth valve body is arranged on the air inlet pipe, a first end of the forward water inlet pipe is connected to a second end of the air inlet pipe, and a first end of the reverse water inlet pipe is connected to a second end of the air inlet pipe; The first valve body, the second valve body, the third valve body and the fourth valve body are opened, the fresh water supply pipe inputs fresh water, and the fresh water discharges the seawater retained in all the pipes and soaks all the pipes.

2. The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering according to claim 1 is characterized in that: The heat exchanger, the forward water inlet pipe, the forward water outlet pipe, the reverse water inlet pipe and the reverse water outlet pipe have multiple groups; The second end of the fresh water supply pipe is connected to a plurality of fresh water supply branch pipes, the first valve body is arranged on the fresh water supply branch pipe, and the first end of the forward water inlet pipe and the first end of the reverse water inlet pipe are connected to the second end of the fresh water supply branch pipe; The second end of the seawater supply pipe is connected to a plurality of seawater supply branch pipes, the second valve body is arranged on the seawater supply branch pipe, and the first end of the forward water inlet pipe and the first end of the reverse water inlet pipe are connected to the second end of the seawater supply branch pipe; The second end of the air intake pipe is connected to a plurality of air intake branch pipes, the tenth valve body is arranged on the air intake branch pipe, and the first end of the forward water intake pipe and the first end of the reverse water intake pipe are connected to the second end of the air intake branch pipe.

3. The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering according to claim 2 is characterized in that: The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: There are two cooling water pumps, one for use and one for standby, which are arranged in parallel on the seawater supply pipe; the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: a sixth valve body, arranged on the seawater supply pipe and located at the front end of each cooling water pump; The seventh valve body is a stop check valve, which is arranged on the seawater supply pipe and located at the rear end of each cooling water pump.

4. The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering according to claim 3 is characterized in that: The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: a fifth valve body, arranged on the seawater supply pipe and located at the front end of the cooling water pump; an eighth valve body, which is a stop check valve, and is disposed at the second end of the fresh water supply pipe; The ninth valve body is a stop check valve, which is arranged at the second end of the forward water outlet pipe; The eleventh valve body is a stop check valve, and is disposed at the second end of the air inlet pipe.

5. The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering according to claim 3 is characterized in that: The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: A controller is electrically connected to the first valve body, the second valve body, the third valve body, the fourth valve body, the tenth valve body and the cooling water pump.

6. The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering according to claim 5 is characterized in that: The anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering also includes: An alarm is electrically connected to the controller.

7. The method for applying the anti-fouling and anti-corrosion device for cooling pipes of ships and marine engineering according to claim 5 is characterized in that: Automatic operation through the controller includes the following steps: Forward cooling of cooling pipe: open the second valve body and the third valve body, close the first valve body and the fourth valve body, the seawater supply pipe inputs external seawater, the seawater passes through the forward water inlet pipe, enters from the inlet, exchanges heat in the heat exchanger, and then enters the forward water outlet pipe from the outlet to be discharged from the ship and marine engineering; Reverse flushing of cooling pipes: close the third valve body, open the fourth valve body, and allow seawater to pass through the reverse water inlet pipe, enter from the outlet, exchange heat in the heat exchanger, and then enter the reverse water outlet pipe from the inlet to be discharged from ships and marine engineering; Compressed air purging of cooling pipes: when ships and marine engineering are not in operation, open the tenth valve body, and input compressed air into the air inlet pipe to purge and discharge the seawater in the reverse water inlet pipe and the reverse water outlet pipe, and close the tenth valve body after the seawater is discharged from the ships and marine engineering; close the fourth valve body, open the third valve body and the tenth valve body, and input compressed air into the air inlet pipe to purge and discharge the seawater in the forward water inlet pipe and the forward water outlet pipe, and close the tenth valve body after the seawater is discharged from the ships and marine engineering; Fresh water soaking of cooling pipes: open the first valve body, the second valve body, the third valve body and the fourth valve body, and input fresh water into the fresh water supply pipe. The fresh water discharges the seawater retained in all pipes and soaks all pipes.

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