A marine liquefied petroleum tank TCS fan control system

Abstract

This utility model discloses a marine liquefied petroleum gas (LPG) tank TCS fan control system, including a base, an LPG tank mounted on the base, and an inlet pipe, an outlet pipe, and a gas supply pipe mounted on the LPG tank. One end of the inlet pipe is equipped with a filtration system, and the other end extends into the LPG tank and is equipped with an inlet solenoid valve. One end of the outlet pipe extends into the LPG tank and forms two branches, each branch equipped with a first fan and a first outlet solenoid valve, a second fan, and a second outlet solenoid valve, respectively. A differential pressure switch is also installed on the outlet pipe. One end of the gas supply pipe is connected to a nitrogen cylinder filled with nitrogen, and a gas supply solenoid valve is installed on the gas supply pipe. This utility model employs a dual-fan and nitrogen protection design to ensure continuous operation of the fans inside the TCS tank when the ship is using fuel gas mode, ensuring ventilation inside the tank and allowing nitrogen to be supplied in dangerous situations. This prevents the accumulation of large amounts of natural gas inside the tank and reduces the probability of explosion, ensuring the safety of the crew and the ship.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, specifically to a TCS fan control system for marine liquefied gas tanks. Background Technology

[0002] In recent years, global environmental awareness has been increasing, leading to a stronger demand for clean fuels. Meanwhile, the implementation of the International Maritime Organization (IMO) Tier III standard in emission control areas has prompted major shipyards to find ways to reduce engine exhaust emissions and the proportion of harmful gases to meet the Tier III standard. Natural gas, as a clean fuel, has become one of the important choices for major shipyards, and this trend is expected to continue to strengthen in the future.

[0003] The TCS tank is located within a liquefied petroleum gas (LPG) tank assembly area, densely packed with various pipes, valves, and flanges. Natural gas is flammable, explosive, and prone to leakage; without proper precautions, a leak could easily lead to an explosion. Utility Model Content

[0004] The purpose of this utility model is to provide a marine liquefied gas tank TCS fan control system to address the defects and shortcomings of the existing technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a marine liquefied petroleum gas (LPG) tank TCS fan control system, including a base on which an LPG tank is mounted. The innovation lies in the following: an air inlet pipe, an air outlet pipe, and a gas delivery pipe are respectively installed on the LPG tank. One end of the air inlet pipe is equipped with a filtration system, and the other end extends into the LPG tank and is equipped with an inlet solenoid valve. One end of the air outlet pipe extends into the LPG tank and forms two branches, with a first fan and a first outlet solenoid valve, a second fan, and a second outlet solenoid valve respectively installed on each branch. A differential pressure switch is also installed on the air outlet pipe. One end of the gas delivery pipe is connected to a nitrogen cylinder filled with nitrogen, and the other end extends into the LPG tank. A gas delivery solenoid valve is installed on the gas delivery pipe. A composite smoke and heat detector is installed on the inner top of the LPG tank. Both the first and second fans are connected to a central control room monitoring and alarm system.

[0006] Furthermore, the filtration system includes a cyclone separator, a condensing filter, an activated carbon adsorption tank, and a sintered metal filter element connected in sequence by pipes.

[0007] Furthermore, both the first and second fans are powered by dual circuits, with both circuits originating from the main distribution board.

[0008] Furthermore, both the first and second fans are controlled by remote control buttons.

[0009] The beneficial effects of this utility model after adopting the above structure are as follows:

[0010] 1. The TCS liquefied gas tank of this utility model adopts a dual-fan and nitrogen protection design to ensure that the fan inside the TCS tank continues to operate when the ship is using gas mode, to ensure ventilation inside the TCS tank and to introduce nitrogen in dangerous situations, to ensure that a large amount of natural gas does not accumulate inside the tank and to reduce the probability of explosion, thereby avoiding explosion and ensuring the safety of the crew and the ship.

[0011] 2. This utility model filters the incoming air by setting up a filtration system, which avoids causing significant pollution to the natural gas in the liquefied gas tank and affecting the normal use of natural gas. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Explanation of reference numerals in the attached figures:

[0014] 1. Base, 2. Liquefaction tank, 3. Inlet pipe, 4. Outlet pipe, 5. Gas supply pipe, 6. Filtration system, 61. Cyclone separator, 62. Condensation filter, 63. Activated carbon adsorption tank, 64. Sintered metal filter element, 7. Inlet solenoid valve, 8. First fan, 9. First outlet solenoid valve, 10. Second fan, 11. Second outlet solenoid valve, 12. Differential pressure switch, 13. Nitrogen cylinder, 14. Gas supply solenoid valve, 15. Composite smoke and heat detection fire detector. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description, in conjunction with the accompanying drawings and specific embodiments, further clarifies this utility model. It should be understood that the specific embodiments described within this container are merely illustrative of the utility model and are not intended to limit its scope.

[0017] See Figure 1 A marine liquefied petroleum gas (LPG) tank TCS fan control system includes a base 1, an LPG tank 2 mounted on the base 1, an inlet pipe 3, an outlet pipe 4, and a gas supply pipe 5 mounted on the LPG tank 2. One end of the inlet pipe 3 is equipped with a filter system 6, and the other end extends into the LPG tank 2, and is equipped with an inlet solenoid valve 7. One end of the outlet pipe 4 extends into the LPG tank and forms two branches, with a first fan 8 and a first outlet solenoid valve 9, a second fan 10, and a second outlet solenoid valve 11 mounted on each branch. A differential pressure switch 12 is also mounted on the outlet pipe 4. One end of the gas supply pipe 5 is connected to a nitrogen cylinder 13 filled with nitrogen, and the other end extends into the LPG tank. A gas supply solenoid valve 14 is mounted on the gas supply pipe 5. A composite smoke and heat detector 15 is mounted on the inner top of the LPG tank 2. Both the first fan 8 and the second fan 10 are connected to a central control room monitoring and alarm system.

[0018] Specifically, when using natural gas, the first blower 8 or the second blower 10 must be used simultaneously to ensure negative pressure in the liquefied gas tank TCS, so that natural gas cannot accumulate in the liquefied gas tank TCS. First, open the inlet solenoid valve 9 and the first outlet solenoid valve 11. When the opening status signal of the inlet solenoid valve 9 and the first outlet solenoid valve 11 is received, the first blower 8 will start automatically.

[0019] A differential pressure switch 12 is installed at the common outlet of the two blowers. If the first blower 8 fails, the gas pressure at the TCS of the liquefied tank cannot be maintained at a negative pressure. After 10 seconds, the differential pressure switch 12 will activate, stopping the first blower 8, closing the first outlet solenoid valve 9, opening the second outlet solenoid valve 11, and starting the second blower 10. The differential pressure switch 12 will then return to normal.

[0020] When both blowers malfunction, activate the gas delivery solenoid valve 14 and nitrogen cylinder 13 to deliver nitrogen to the liquefied tank 2, reducing the chance of explosion; of course, nitrogen can also be used in conjunction with the blowers.

[0021] A composite smoke and heat detector 15 is installed at the TCS of the liquefied gas tank. When a fire is detected, the natural gas supply and the blower are immediately cut off, and the inlet solenoid valve 7, the first outlet solenoid valve 9, and the second outlet solenoid valve 11 are closed to ensure safety.

[0022] Meanwhile, the central control room monitoring and alarm system monitors the operating status and switching alarms of all fans;

[0023] The filtration system 6 filters the incoming air to prevent significant pollution of the natural gas in the liquefied gas tank and to avoid affecting the normal use of the natural gas.

[0024] In summary, during the use of natural gas, the ventilation fan in the LPG tank TCS space operates continuously to maintain negative pressure in the room, thereby ensuring that natural gas cannot accumulate in the LPG tank TCS space and cause an explosion in the event of a leak.

[0025] In this embodiment, the filtration system 6 includes a cyclone separator 61, a coagulation filter 62, an activated carbon adsorption tank 63, and a sintered metal filter element 64, which are connected in sequence by pipes. The cyclone separator 61 is used to remove large particles (>10μm) and liquid water; the coagulation filter 62 is used to separate oil mist, water mist, and fine particles; the activated carbon adsorption tank 63 is used to remove gaseous pollutants such as VOCs / H2S; and the sintered metal filter element 64 provides final precision filtration with an anti-backflush design.

[0026] In this embodiment, the power supply for both the first fan 8 and the second fan 10 is a dual-circuit system, with both circuits originating from the main distribution board. The liquefied gas tank 2 is equipped with dual fans, each serving as a backup for the other, ensuring automatic switching to the backup power supply in case of a power failure in one circuit.

[0027] In this embodiment, both the first fan 8 and the second fan 10 are controlled by remote control buttons. Alternatively, they can be remotely operated from the central control room via the fan starter box, offering convenience, flexibility, and improved practicality.

[0028] This utility model is designed as a complete set of components including dual fans, nitrogen protection, composite smoke and temperature sensors, differential pressure switch, inlet solenoid valve, outlet solenoid valve, limit switch, starter box, cable, and stainless steel pipe. It ensures that the natural gas at the TCS of the liquefied gas tank is always under negative pressure during the use of natural gas, and that even if natural gas leaks, it cannot accumulate, thus ensuring the safety of the ship and personnel.

[0029] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A marine liquefied petroleum gas (LPG) tank TCS fan control system, comprising a base on which an LPG tank is mounted, characterized in that: The liquefied gas tank is equipped with an air inlet pipe, an air outlet pipe, and a gas supply pipe. One end of the air inlet pipe is fitted with a filtration system, and the other end extends into the liquefied gas tank, where an inlet solenoid valve is installed. One end of the air outlet pipe extends into the liquefied gas tank, forming two branches, each branch equipped with a first fan and a first outlet solenoid valve, a second fan and a second outlet solenoid valve, respectively. A differential pressure switch is also installed on the air outlet pipe. One end of the gas supply pipe is connected to a nitrogen cylinder filled with nitrogen, and the other end extends into the liquefied gas tank, where a gas supply solenoid valve is installed. A composite smoke and heat detector is installed at the top inner surface of the liquefied gas tank. Both the first and second fans are connected to the central control room monitoring and alarm system.

2. The marine liquefied petroleum tank TCS fan control system according to claim 1, characterized in that: The filtration system includes a cyclone separator, a condensing filter, an activated carbon adsorption tank, and a sintered metal filter element connected in sequence by pipes.

3. The marine liquefied gas tank TCS fan control system according to claim 1, characterized in that: The power supply for both the first and second fans is a dual-circuit system, with both circuits originating from the main distribution board.

4. The marine liquefied gas tank TCS fan control system according to claim 1, characterized in that: Both the first and second fans are controlled by remote control buttons.

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