Ice region ship inert gas system

Abstract

The invention provides an ice region ship inert gas system, which comprises an inert gas generating device, an ice region ship inert gas generating device, an ice region ship inert gas generating device and an ice region ship inert gas generating device, the inert gas buffering device is communicated with the inert gas generating device, and the inert gas buffering device is used for storing the inert gas generated by the inert gas generating device; and the inert gas buffering device is communicated with the inert gas supercharging device, and the inert gas supercharging device is communicated with the main engine gas supply valve unit. Provided is an inert gas system for a ship in an ice region, in which when fuel is changed from LNG to fuel oil, a part of LNG gas remains inside a pipeline and equipment, and the residual LNG gas can be discharged using inert gas. The inert gas system is used for discharging and dispersing leaked LNG as soon as possible, and the safety of the ship is protected.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to an inert gas system for an ice-covered ship. Background Art

[0002] Due to high global oil prices, increasingly severe air pollution, and the implementation of various new environmental regulations, liquefied natural gas (LNG) has naturally gained increasing support as a marine fuel, and the technological development of LNG-powered ships has also attracted increasing attention. As this technology develops, we also see the future development trend of LNG-powered ships in the marine market. To protect the environment and reduce operating costs, this ice-faring vessel uses an LNG dual-fuel system for its main and auxiliary engines. LNG is a flammable and explosive gas, significantly increasing the risk factor on board. When switching from LNG to fuel oil, some LNG gas will remain in pipelines and equipment. If the LNG gas leaks, the concentration could reach the explosion limit, increasing the risk to the ship. Summary of the Invention

[0003] The present invention provides an inert gas system for an ice-going ship, comprising:

[0004] an inert gas generating device, wherein the inert gas generating device can generate inert gas;

[0005] an inert gas buffer device, the inert gas generating device being in communication with the inert gas buffer device, the inert gas buffer device being used to store the inert gas generated by the inert gas generating device;

[0006] An inert gas pressurizing device, wherein the inert gas buffer device is in communication with the inert gas pressurizing device, and the inert gas pressurizing device is in communication with a main engine gas supply valve unit.

[0007] Furthermore, the inert gas buffer device is connected to the generator crankcase, the No. 1 generator air supply valve unit, the No. 2 generator air supply valve unit, the No. 3 generator air supply valve unit, and the boiler air supply valve unit respectively.

[0008] Furthermore, the inert gas buffer device is connected to the high-pressure pump unit, the evaporator heating unit, the evaporator buffer unit, the starboard fuel connection location, and the port fuel connection location respectively.

[0009] Furthermore, the inert gas buffer device is connected to the port side gas filling station and the starboard side gas filling station respectively.

[0010] Furthermore: the inert gas generating device may be a nitrogen generating device.

[0011] Furthermore: the nitrogen generating device includes an air compressor, a dryer, and a nitrogen generator connected in sequence.

[0012] Furthermore: the nitrogen generating device also includes a compressed air discharge device, and the air compressor, the dryer, and the nitrogen generator are all connected to the compressed air discharge device.

[0013] Furthermore: the nitrogen generating device also includes an oil residue tank, and the compressed air discharge device is connected to the oil residue tank.

[0014] Furthermore: the nitrogen generating device also includes an oil mist box, and the compressed air discharge device is connected to the oil mist box.

[0015] Furthermore: the nitrogen generator is provided with a sampling port.

[0016] The beneficial effects brought about by the present invention are as follows:

[0017] As can be seen from the above scheme, the present invention provides an inert gas system for ice-going vessels. When the fuel is changed from LNG to fuel oil, some LNG gas will remain in the pipelines and equipment. This residual LNG gas can be discharged using inert gas. The inert gas system can quickly remove and disperse the leaked LNG, protecting the ship's safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of an inert gas system for an ice-going vessel provided by the present invention is shown.

[0019] In the figure, 1 is an air compressor; 2 is an oil mist box; 3 is an oil residue tank; 4 is a compressed air discharge device; 5 is a dryer; 6 is a nitrogen generator; 7 is an inert gas buffer device; 8 is an inert gas booster device; 9 is a generator crankcase; 10 is the No. 1 generator air supply valve unit; 11 is the No. 2 generator air supply valve unit; 12 is the No. 3 generator air supply valve unit; 13 is a high-pressure pump unit; 14 is an evaporator heating unit; 15 is an evaporator buffer unit; 16 is the starboard fuel connection space; 17 is the port fuel connection space; 18 is the starboard gas filling station; 19 is the port gas filling station; 20 is the main engine air supply valve unit; 21 is the boiler air supply valve unit. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] like Figure 1 As shown, the present invention provides an inert gas system for an ice-going vessel, comprising:

[0022] An inert gas generating device, wherein the inert gas generating device can generate inert gas;

[0023] an inert gas buffer device 7, the inert gas generating device is in communication with the inert gas buffer device 7, and the inert gas buffer device 7 is used to store the inert gas generated by the inert gas generating device;

[0024] The inert gas boosting device 8 and the inert gas buffer device 7 are in communication with the inert gas boosting device 8 , and the inert gas boosting device 8 is in communication with the main engine gas supply valve unit 20 .

[0025] Specifically, the inert gas generating device may be a nitrogen generating device 6. The nitrogen generating device 6 includes an air compressor 1, a dryer 5, and a nitrogen generator that are connected in sequence.

[0026] Outside air is compressed by air compressor 1 and enters dryer 5, a heatless adsorption air dryer used to remove moisture from the compressed air. The dried compressed air then enters the nitrogen generator, which uses pressure swing adsorption to produce nitrogen.

[0027] Furthermore, the nitrogen generating device 6 also includes a compressed air discharge device 4 , and the air compressor 1 , the dryer 5 , and the nitrogen generator are all connected to the compressed air discharge device 4 .

[0028] When the air compressor 1, the dryer 5, and the nitrogen generator produce nitrogen, the moisture and lubricating oil generated are discharged into the compressed air discharge device 4.

[0029] Furthermore, the nitrogen generating device 6 further includes an oil residue tank 3 , and the compressed air discharge device 4 is in communication with the oil residue tank 3 .

[0030] The oil residue in the compressed air discharge device 4 is discharged into the oil residue tank 3.

[0031] Furthermore, the nitrogen generating device 6 further includes an oil mist box 2 , and the compressed air discharge device 4 is connected to the oil mist box 2 .

[0032] The oil mist in the compressed air discharge device 4 is discharged into the oil mist box 2 .

[0033] Furthermore, the nitrogen generator is provided with a sampling port, which can be used to detect the amount and concentration of nitrogen generated.

[0034] Furthermore, the inert gas buffer device 7 is connected to the generator crankcase 9, the No. 1 generator air supply valve unit 10, the No. 2 generator air supply valve unit 11, the No. 3 generator air supply valve unit 12, and the boiler air supply valve unit 21 respectively.

[0035] Furthermore, the inert gas buffer device 7 is connected to the high-pressure pump unit 13, the evaporator heating unit 14, the evaporator buffer unit 15, the starboard fuel connection location 16, and the port fuel connection location 17 respectively.

[0036] Furthermore, the inert gas buffer device 7 is connected to the port side gas filling station 19 and the starboard side gas filling station 18 respectively.

[0037] The nitrogen generated by the inert gas buffer device 7 can be put into use directly, or can be put into use after being pressurized by the inert gas pressurizing device 8 .

[0038] For example, the inert gas to the main engine air supply valve must first pass through the booster.

[0039] The inert gas buffer device 7 is connected to the generator crankcase 9, the No. 1 generator air supply valve unit 10, the No. 2 generator air supply valve unit 11, the No. 3 generator air supply valve unit 12, and the boiler air supply valve unit 21 respectively.

[0040] The inert gas buffer device 7 is communicated with the high-pressure pump unit 13 , the evaporator heating unit 14 , the evaporator buffer unit 15 , the starboard fuel connection location 16 , and the port fuel connection location 17 , respectively.

[0041] The inert gas buffer device 7 is communicated with the port side gas filling station 19 and the starboard side gas filling station 18 respectively.

[0042] Inert gas is released in the above-mentioned relevant places to clear the residual LNG gas inside the system, and the LNG gas concentration will not reach the explosion limit.

[0043] When the equipment finishes using LNG gas, some LNG gas will remain inside the system. Use inert gas to remove the remaining LNG gas to ensure the safety of the system.

[0044] The beneficial effects brought about by the present invention are as follows:

[0045] As can be seen from the above scheme, the present invention provides an inert gas system for ice-going vessels. When the fuel is changed from LNG to fuel oil, some LNG gas will remain in the pipelines and equipment. This residual LNG gas can be discharged using inert gas. The inert gas system can quickly remove and disperse the leaked LNG, protecting the ship's safety.

[0046] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An inert gas system for ice-going vessels, characterized by: include: an inert gas generating device, wherein the inert gas generating device can generate inert gas; an inert gas buffer device, the inert gas generating device being in communication with the inert gas buffer device, the inert gas buffer device being used to store the inert gas generated by the inert gas generating device; An inert gas pressurizing device, wherein the inert gas buffer device is in communication with the inert gas pressurizing device, and the inert gas pressurizing device is in communication with a main engine gas supply valve unit.

2. The inert gas system for ice-going vessels according to claim 1, characterized in that: The inert gas buffer device is connected to the generator crankcase, the No. 1 generator air supply valve unit, the No. 2 generator air supply valve unit, the No. 3 generator air supply valve unit, and the boiler air supply valve unit respectively.

3. The inert gas system for ice-going vessels according to claim 1, characterized in that: The inert gas buffer device is communicated with the high-pressure pump unit, the evaporator heating unit, the evaporator buffer unit, the starboard fuel connection location, and the port fuel connection location respectively.

4. The inert gas system for ice-going vessels according to claim 1, characterized in that: The inert gas buffer device is communicated with the port side gas filling station and the starboard side gas filling station respectively.

5. The inert gas system for ice-going vessels according to claim 1, characterized in that: The inert gas generating device may be a nitrogen generating device.

6. The inert gas system for ice-going vessels according to claim 5, characterized in that: The nitrogen generating device comprises an air compressor, a dryer, and a nitrogen generator which are connected in sequence.

7. The inert gas system for ice-going vessels according to claim 6, characterized in that: The nitrogen generating device further includes a compressed air discharge device, and the air compressor, the dryer, and the nitrogen generator are all connected to the compressed air discharge device.

8. The inert gas system for ice-going vessels according to claim 7, characterized in that: The nitrogen generating device further includes an oil residue tank, and the compressed air discharge device is in communication with the oil residue tank.

9. The inert gas system for ice-going vessels according to claim 8, characterized in that: The nitrogen generating device further includes an oil mist box, and the compressed air discharge device is communicated with the oil mist box.

10. The inert gas system for ice-going vessels according to claim 9, characterized in that: The nitrogen generator is provided with a sampling port.

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