A seawater filter automatic deicing system using ship waste heat

Abstract

The application discloses a seawater filter automatic deicing system utilizing ship waste heat, which comprises a seawater filter for leading outboard seawater from a ship sea chest to the ship for the whole ship use through a seawater main pipe, wherein the seawater filter communication end with the sea chest is taken as an import end, the seawater filter communication end with the ship system is taken as an export end, the seawater main pipe is provided with a seawater cooling system and a differential pressure sensor in parallel on both sides of the seawater filter, the seawater cooling system provides high-temperature cooling seawater for the automatic deicing system and is connected with a seawater cooling pipe discharge outboard pipe in series, and the differential pressure sensor monitors the pressure difference between both sides of the seawater filter in real time; temperature sensors are arranged on the seawater main pipe of the seawater filter export end and in the seawater cooling system to monitor seawater temperature in real time; and the automatic deicing system further comprises a remote control valve system, which realizes the control of seawater flow in each pipeline by controlling the opening of the remote control valve. The seawater filter is automatically deiced by utilizing the ship waste heat, the seawater filter is prevented from being blocked by ice blocks, and the navigation safety of the ship is ensured.

Description

Technical Field

[0001] This invention relates to an automatic de-icing system for seawater filters that utilizes waste heat from ships, belonging to the field of seawater filter de-icing technology in marine engineering. Background Technology

[0002] Seawater plays an irreplaceable role in ships, serving many crucial functions beyond simply carrying the vessel. It acts as ballast water, regulating the ship's draft and buoyancy; it provides fire-fighting water for the ship's fire suppression systems; and it acts as cooling water for the ship's equipment and systems. Seawater typically enters the main seawater pipe through a seagate, supplying the entire ship with seawater. Seawater filters are installed on the main seawater pipe to remove impurities from the seawater.

[0003] However, ships navigating in certain sea areas, such as the northern waters of my country, often face the problem of floating ice during winter navigation. Although the seagate is equipped with a grille, some small pieces of floating ice can still enter the main seawater pipe through the seagate, eventually accumulating at the seawater filter in the main seawater pipe, causing blockage and affecting the ship's seawater supply. Insufficient seawater supply can easily lead to ineffective cooling of critical equipment such as the ship's main engine, potentially causing overheating shutdowns and seriously affecting navigational safety; insufficient seawater supply also poses a serious fire hazard to the ship. Therefore, there is an urgent need in this field for a seawater filter de-icing system to solve the problem of filter blockage caused by floating ice. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide an automatic de-icing system for seawater filters that utilizes ship waste heat. This system uses the ship's waste heat—specifically, the high-temperature seawater after the cooler—to automatically de-ice the seawater filters, ensuring that the ship's seawater supply is not affected by floating ice.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0006] This invention provides an automatic de-icing system using a seawater filter that utilizes ship waste heat. The system includes a seawater filter that draws seawater from the ship's sea passage through a main seawater pipe to the ship for use by the entire vessel. The end of the seawater filter connected to the sea passage serves as the inlet, and the end connected to the ship's systems serves as the outlet. A seawater cooling system and a differential pressure sensor are connected in parallel on both sides of the seawater filter via the main seawater pipe. The seawater cooling system operates continuously to provide high-temperature cooled seawater for the automatic de-icing system. The seawater cooling system is also connected in series with a seawater cooling pipe leading to the outboard pipe. The differential pressure sensor monitors the pressure difference across the seawater filter in real time. At least one temperature sensor is installed on both the main seawater pipe at the filter's outlet and in the seawater cooling system to monitor the seawater temperature in these systems in real time. The system also includes a remote control valve system to control the seawater flow rate on each pipeline by adjusting the valve opening.

[0007] Preferably, the seawater cooling system includes a cooler and a cooling pump. The cooling pump and the cooler are connected in parallel to the seawater main pipe at the outlet end of the seawater filter and are connected in series via seawater cooling pipes. The outlet end of the cooler is connected in series with a seawater cooling pipe return pipe via the seawater cooling pipes, and the seawater cooling pipe return pipe is connected to the seawater main pipe at the inlet end of the seawater filter.

[0008] Furthermore, the temperature sensor on the seawater cooling system is installed on the outlet pipe of the seawater cooler.

[0009] Furthermore, the remote control valve system includes a seawater inlet remote control valve, which is connected in series with the seawater main pipe at the inlet end of the seawater filter.

[0010] Furthermore, the remote control valve system also includes a cooling seawater return remote control valve, which is connected in series on the seawater cooling pipe return pipe.

[0011] Furthermore, the seawater cooling pipe outlet pipe is connected in series with the seawater cooling pipe at the outlet end of the cooler.

[0012] Furthermore, the remote control valve system also includes a cooling seawater discharge outboard remote control valve, which is connected in series on the seawater cooling pipe discharge outboard pipe.

[0013] Furthermore, it also includes a control terminal, which is electrically connected to the differential pressure sensor, multiple temperature sensors, and the remote control valve system. The control terminal has preset differential pressure and temperature thresholds. The control terminal continuously collects signals from the differential pressure sensor and temperature sensor to monitor the differential pressure and temperature in real time and compare them with the differential pressure and temperature thresholds, thereby controlling the opening degree of each remote control valve in the remote control valve system.

[0014] Furthermore, the temperature sensor on the seawater main pipe is installed on the seawater main pipe at the outlet end of the seawater filter.

[0015] Preferably, both the differential pressure sensor and the temperature sensor are equipped with thermal backup to ensure the reliability of the system.

[0016] The automatic de-icing system for seawater filters provided by this invention, utilizing waste heat from ships, has the following advantages: 1. The present invention relates to an automatic de-icing system for seawater filters utilizing ship waste heat. A differential pressure sensor is installed on the seawater filter in the main seawater pipe to monitor the clogging status of the seawater filter in real time, serving as the control input signal and alarm signal for the system. Temperature sensors are installed on both the main seawater pipe and the seawater cooling pipe to monitor the temperature on both pipes in real time, serving as the control input signal and alarm signal for the system. At the same time, both the differential pressure sensor and the temperature sensor are equipped with thermal backup to ensure the reliability of the system.

[0017] 2. The automatic de-icing system for seawater filters utilizing ship waste heat of the present invention is equipped with a seawater cooling return pipe to bring high-temperature cooled seawater to the inlet of the seawater filter; the seawater main pipe and the seawater cooling pipe are equipped with remote control valves, and the flow rate of seawater inlet and high-temperature cooled seawater is controlled by controlling the opening degree of the remote control valves.

[0018] 3. The automatic de-icing system for seawater filters utilizing ship waste heat of the present invention transmits differential pressure sensors, temperature sensors, and remote control valve opening signals to the control terminal. The control terminal processes the collected signals and monitors in real time the blockage of floating ice in the seawater main filter (the higher the differential pressure, the more severe the blockage) and the temperature of the seawater main. By controlling the opening of the remote control valve, the seawater filter is automatically de-iced to prevent it from being blocked by ice and ensure the navigation safety of the ship. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection relationship of an automatic de-icing system for seawater filters that utilizes waste heat from ships, provided as an embodiment of the present invention.

[0020] In the picture: 1-Seawater filter; 2-Seawater main pipe; 3-Seawater cooling system; 31-Cooler; 32-Cooling pump; 4-Differential pressure sensor; 5-Temperature sensor; 6-Seawater cooling pipe; 7-Seawater cooling pipe return pipe; 8-Remote control valve system; 81-Seawater inlet remote control valve; 82-Cooling seawater return remote control valve; 83-Cooling seawater outboard remote control valve; 9-Seawater cooling pipe outboard pipe. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference Figure 1 This application provides an automatic de-icing system for a seawater filter that utilizes waste heat from a ship, including a seawater filter 1, a seawater cooling system 3, a differential pressure sensor 4, and a temperature sensor 5.

[0023] Seawater filter 1 draws seawater from the seabed hatch through the seawater main pipe 2 to the ship for use by the entire vessel. The end of seawater filter 1 connected to the seabed hatch is the inlet, and the end connected to the ship's systems is the outlet. Seawater cooling system 3 and differential pressure sensor 4 are connected in parallel on both sides of seawater filter 1 on seawater main pipe 2. Seawater cooling system 3 is continuously operating to provide high-temperature cooling seawater for the automatic de-icing system, i.e., a source of waste heat. Seawater cooling system 3 is also connected in series with seawater cooling pipe outlet pipe 9. Differential pressure sensor 4 is used to monitor the pressure difference between the inlet and outlet of seawater filter 1 in real time; the greater the pressure difference, the more severe the blockage. At least one temperature sensor 5 is installed on seawater main pipe 2 at the outlet end of seawater filter 1 and in seawater cooling system 3 to monitor the seawater temperature in seawater main pipe 2 and seawater cooling system 3 in real time.

[0024] Reference Figure 1 The seawater cooling system 3 includes a cooler 31 and a cooling pump 32. The cooling pump 32 and the cooler 31 are connected in parallel to the seawater main pipe 2 at the outlet end of the seawater filter 1 and are connected in series via seawater cooling pipe 6. The outlet end of the cooler 31 is connected in series via seawater cooling pipe 6 and seawater cooling pipe return pipe 7. The seawater cooling pipe return pipe 7 is connected to the seawater main pipe 2 at the inlet end of the seawater filter 1, so that the waste heat of the high-temperature cooling seawater can be introduced to the inlet end of the seawater filter 1, and the filter can be automatically de-iced by using the waste heat of the high-temperature cooling seawater.

[0025] Furthermore, the temperature sensor 5 on the seawater cooling system 3 is installed on the outlet pipe of the seawater cooler 31, and the temperature sensor 5 on the seawater main pipe 2 is installed on the seawater main pipe 2 at the outlet end of the seawater filter 1, thereby realizing real-time monitoring of the seawater temperature in the seawater main pipe 2 and the seawater cooling pipe 6. In this embodiment, the temperature sensor 5 needs to meet low-temperature adaptability, including but not limited to platinum resistance temperature sensor 5, Vaisala HMP series temperature and humidity sensor or RMS-T10-0001 NTC temperature sensor 5, etc. The installation and application are existing technologies and will not be described in detail.

[0026] Reference Figure 1An automatic de-icing system for seawater filters utilizing ship waste heat includes a remote control valve system 8 that controls the seawater flow rate on each pipeline by controlling the opening of remote control valves. The remote control valve system 8 has a seawater inlet remote control valve 81, a cooling seawater return remote control valve 82, and a cooling seawater discharge overboard remote control valve 83, all of which are remote-controlled butterfly valves. The seawater inlet remote control valve 81 is connected in series to the seawater main pipe 2 at the inlet end of the seawater filter 1 to control the inlet flow rate of the seawater flowing into the seawater filter 1. The cooling seawater return remote control valve 82 is connected in series to the seawater cooling pipe return pipe 7 to control the flow rate of high-temperature cooling water returning to the inlet end of the seawater filter 1. The seawater cooling pipe 6 outlet pipe is connected in series with the seawater cooling pipe 6 at the outlet end of the cooler 31, and the cooling seawater discharge overboard remote control valve 83 is connected in series to the seawater cooling pipe 6 outlet pipe, thereby discharging high-temperature cooling water overboard and achieving flow control.

[0027] Furthermore, it also includes a control terminal (not shown in the figure). The control terminal is a computer equipped with a closed-loop control system that implements data acquisition → logic operation → control output. The control system includes, but is not limited to, Siemens WinCC, KingView, or JOYZL SCADA control systems, which are existing technologies and will not be described in detail. The control terminal is electrically connected to the differential pressure sensor 4, multiple temperature sensors 5, and the remote control valve system 8. The control system of the control terminal has preset differential pressure and temperature thresholds. The control terminal continuously acquires signals from the differential pressure sensor 4 and temperature sensors 5 to monitor the differential pressure and temperature in real time and compare them with the differential pressure and temperature thresholds, thereby controlling the opening degree of each remote control valve in the remote control valve system 8. In this embodiment, both the differential pressure sensor 4 and the temperature sensors 5 are equipped with hot backups to ensure the reliability of the system.

[0028] The working principle of the automatic de-icing system for a seawater filter 1 utilizing ship waste heat provided by this invention is as follows: During ship navigation, the seawater inlet remote control valve 81 is fully open to supply seawater to the ship. The control system at the control end continuously collects signals from the differential pressure sensor 4 and the temperature sensor 5, and monitors the differential pressure and temperature in real time. When the differential pressure of the differential pressure sensor 4 exceeds the set threshold, the control system will issue an alarm and automatically open the cooling seawater return remote control valve 82, gradually increasing its opening degree, while simultaneously decreasing the opening degree of the seawater inlet remote control valve 81 and the cooling seawater discharge overboard remote control valve 83. The high-temperature cooling seawater is led to the seawater filter 1 through the seawater cooling pipe return pipe 7, while reducing the seawater inlet flow rate of the seawater main pipe 2. The waste heat from the high-temperature cooling seawater is used to automatically de-ice the seawater filter 1.

[0029] Throughout the de-icing process, the system continuously collects the differential pressure signal of seawater filter 1 and the opening signals of each remote control valve. After de-icing begins, the differential pressure of seawater filter 1 gradually decreases, and the entire control process continues until the differential pressure of seawater filter 1 drops below the set value. During the de-icing process, if the temperature value of temperature sensor 5 exceeds the set threshold, the control system will issue an alarm and automatically reduce the opening of the cooling seawater return remote control valve 82, while simultaneously increasing the opening of the seawater inlet remote control valve 81 and the cooling seawater outboard remote control valve 83. This reduces the return flow of high-temperature cooling seawater and increases the inlet flow of seawater to ensure that the seawater temperature in the seawater main pipe 2 is within a reasonable set range, thereby ensuring the cooling effect of the ship's seawater. By fitting the collected signals and controlling the opening of each remote control valve, the control system ultimately achieves a dynamic balance between the differential pressure at the inlet and outlet of seawater filter 1, the seawater temperature in the main pipe, and the flow rates of each seawater type.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic de-icing system using a seawater filter utilizing ship waste heat, comprising a seawater filter (1), wherein the seawater filter (1) draws seawater from the ship's sea passage through a seawater main pipe (2) to the ship for use by the entire ship, the end of the seawater filter (1) connected to the sea passage serving as the inlet end, and the end connected to the ship's system serving as the outlet end, characterized in that, The seawater main pipe (2) is connected in parallel with a seawater cooling system (3) and a differential pressure sensor (4) on both sides of the seawater filter (1). The seawater cooling system (3) is in continuous operation to provide high-temperature cooling seawater for the automatic de-icing system. The seawater cooling system (3) is also connected in series with a seawater cooling pipe outlet pipe (9). The differential pressure sensor (4) is used to monitor the pressure difference on both sides of the seawater filter (1) in real time. At least one temperature sensor (5) is provided on the seawater main pipe (2) at the outlet end of the seawater filter (1) and in the seawater cooling system (3) to monitor the seawater temperature in the seawater main pipe (2) and the seawater cooling system (3) in real time. It also includes a remote control valve system (8), which controls the seawater flow rate on each pipeline by controlling the opening degree of the remote control valve.

2. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 1, characterized in that, The seawater cooling system (3) includes a cooler (31) and a cooling pump (32). The cooling pump (32) and the cooler (31) are connected in parallel to the seawater main pipe (2) at the outlet end of the seawater filter (1) and are connected in series via the seawater cooling pipe (6). The outlet end of the cooler (31) is connected in series via the seawater cooling pipe (6) and the seawater cooling pipe return pipe (7). The seawater cooling pipe return pipe (7) is connected to the seawater main pipe (2) at the inlet end of the seawater filter (1).

3. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 2, characterized in that, The temperature sensor (5) on the seawater cooling system (3) is installed on the outlet pipe of the seawater cooler (31).

4. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 2, characterized in that, The remote control valve system (8) includes a seawater inlet remote control valve (81), which is connected in series with the seawater main pipe (2) at the inlet end of the seawater filter (1).

5. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 4, characterized in that, The remote control valve system (8) also includes a cooling seawater return remote control valve (82), which is connected in series on the seawater cooling pipe return pipe (7).

6. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 5, characterized in that, The seawater cooling pipe outlet pipe (9) is connected in series with the seawater cooling pipe (6) at the outlet end of the cooler (31).

7. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 6, characterized in that, The remote control valve system (8) also includes a cooling seawater discharge outboard remote control valve (83), which is connected in series on the seawater cooling pipe (6) outboard pipe.

8. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 7, characterized in that, It also includes a control terminal, which is electrically connected to the differential pressure sensor (4), multiple temperature sensors (5) and the remote control valve system (8). The control terminal has preset differential pressure and temperature thresholds. The control terminal continuously collects signals from the differential pressure sensor (4) and temperature sensor (5) to monitor the differential pressure and temperature in real time and compare them with the differential pressure and temperature thresholds, thereby controlling the opening degree of each remote control valve in the remote control valve system (8).

9. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 2, characterized in that, The temperature sensor (5) on the seawater main pipe (2) is installed on the seawater main pipe (2) at the outlet end of the seawater filter (1).

10. The automatic de-icing system for seawater filters utilizing ship waste heat as described in claim 1, characterized in that, Both the differential pressure sensor (4) and the temperature sensor (5) are equipped with thermal backup to ensure the reliability of the system.

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