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CN-122009459-A - Ammonia fuel ship water mist capturing system

CN122009459ACN 122009459 ACN122009459 ACN 122009459ACN-122009459-A

Abstract

The invention provides an ammonia fuel ship water mist capturing system which comprises a water source, a waterway and a capturing end, wherein the water source comprises two water sources including seawater and fresh water and is used as a water source for absorbing leaked ammonia, the waterway comprises a pipeline system for connecting the water source and cabins to be monitored, the waterway is a high-pressure pipeline, the capturing end comprises a spraying system which is arranged in each cabin to be monitored and is connected with the waterway, and when the ammonia concentration in the cabin is monitored to exceed the standard, the capturing end begins to spray water mist to absorb the ammonia in the cabin. The invention is more beneficial to the overall arrangement of the ship on one hand, and is more beneficial to limiting the diffusion of ammonia fuel on the other hand, thereby providing a guarantee of higher safety coefficient for crews.

Inventors

  • XU HAO
  • YANG JUN
  • XU LIN
  • ZHAO YAOZHONG
  • WANG YALEI
  • WANG XINHAO

Assignees

  • 上海船舶研究设计院

Dates

Publication Date
20260512
Application Date
20251202

Claims (10)

  1. 1. An ammonia-fueled marine water mist capture system, comprising: the water sources comprise seawater and fresh water, and are used as water sources for absorbing leaked ammonia; The waterway comprises a pipeline system for connecting the water source and each cabin to be monitored, and the waterway is a high-pressure pipeline; The capturing end comprises spraying systems which are arranged in each cabin to be monitored and connected with the waterway, and when the ammonia concentration in the cabin is monitored to exceed the standard, the capturing end begins to spray water mist to absorb the ammonia in the cabin.
  2. 2. The ammonia fuel vessel mist capture system of claim 1, wherein the fresh water source comprises a technical sump and the seawater source comprises a seawater main; The fresh water supply pipeline comprises three parallel fresh water branches, and the three fresh water branches are respectively provided with a fresh water pump and a fresh water valve; the seawater supply pipeline comprises three parallel seawater branches, and the three seawater branches are provided with seawater pumps and seawater valves.
  3. 3. The ammonia fuel ship water mist capturing system according to claim 2, wherein a first normally open valve, a first filter valve, a first fresh water pump, a first check valve and a second normally open valve are sequentially arranged on the first fresh water branch from the technical water tank to the capturing end.
  4. 4. The ammonia fuel ship water mist capturing system according to claim 2, wherein a first normally closed valve, a second filter valve, a second fresh water pump, a second check valve and a second normally closed valve are sequentially arranged on the second fresh water branch from the technical water tank to the capturing end.
  5. 5. The ammonia fuel ship water mist capturing system according to claim 2, wherein a third normally open valve, a third filter valve, a fresh water booster pump, a third check valve and a fourth normally closed valve are sequentially arranged on the third fresh water branch from the technical water tank to the capturing end.
  6. 6. The ammonia fuel ship water mist capturing system according to claim 2, wherein a third normally open valve, a fourth filter valve, a first seawater pump, a fourth check valve and a fourth normally open valve are sequentially arranged on the first seawater branch from the seawater main pipe to the capturing end.
  7. 7. The ammonia fuel vessel water mist capturing system according to claim 2, wherein a fifth normally closed valve, a fifth filter valve, a second seawater pump, a fifth check valve and a sixth normally closed valve are sequentially arranged on the second seawater branch from the seawater main pipe to the capturing end.
  8. 8. The ammonia fuel ship water mist capturing system according to claim 2, wherein a seventh normally closed valve, a sixth filter valve, a seawater booster pump, a sixth check valve and an eighth normally closed valve are sequentially arranged on the third seawater branch from the seawater main pipe to the capturing end.
  9. 9. The ammonia fuel ship water mist capturing system of claim 2, wherein the fresh water pump and the seawater pump are respectively connected with a fresh water pump starter and a seawater pump starter, and the fresh water pump starter and the seawater pump starter are both connected with a main control box.
  10. 10. The ammonia-fueled marine water mist capturing system according to any one of claims 1 to 9, further comprising: the closed end comprises air gates corresponding to each cabin to be monitored in the ship air path system, and when the ammonia concentration in the cabin is monitored to exceed the standard, the air gates of the inlet and outlet of the cabin air path are closed.

Description

Ammonia fuel ship water mist capturing system Technical Field The invention belongs to the technical field of design of ammonia fuel ship safety systems, and particularly relates to an ammonia fuel ship water mist capturing system. Background In the environment-friendly background of global carbon emission reduction, ammonia fuel without carbon element is becoming a new favor in the industry, however, the most remarkable characteristic, namely toxicity, also brings challenges to ship design. As an emerging fuel for ships, various national ports and class agencies hanging flag have proposed various restrictions on the arrangement of ammonia-fueled ships from the viewpoint of safety. Considering that ammonia is volatile and has strong toxicity, the requirements of all class agencies on the toxic areas of the places related to ammonia are generally met, and taking DNV and C-type tanks as examples, the range of the toxic areas is generally shown in the following table: Breathable mast 25mSecondary shielding ventilation, or mechanical ventilation outlets10M and 4m above deckJoint of filling station10mFPR, TCS, filling station doorway5mCarnot cycle internal combustion engine exhaust outlet10M and 4m above deck The toxic area limits the overall arrangement of the vessel, e.g. the room in which personnel often get in and out is not allowed to be arranged in the toxic area, the ventilation inlet of the safety site is not allowed to be arranged in the toxic area, the ventilation inlet of the TCS/FPR/filling station may be arranged in the ventilation mast toxic area, but needs to be remote from the ventilation mast 10m, etc. These limitations present significant challenges for the overall layout of the vessel and vent line design. Furthermore, the 2025 newly published MSC.1/circ.1687 document sets more stringent requirements, such as specifying that the ventilation inlet of TCS, FPR and double wall ventilation ducts will also create a 5m toxic zone, for which several ventilation inlets are not adjacent and need to be spaced at least 5m apart. With the stack of requirements, the overall arrangement of the ventilation system and the vessel is very difficult, almost impossible, for some small vessels, especially for the 1300TEU class of feeder box vessels. Disclosure of Invention In order to solve the problems in the prior art, the invention provides an ammonia fuel ship water mist capturing system, which comprises: the water sources comprise seawater and fresh water, and are used as water sources for absorbing leaked ammonia; The waterway comprises a pipeline system for connecting the water source and each cabin to be monitored, and the waterway is a high-pressure pipeline; The capturing end comprises spraying systems which are arranged in each cabin to be monitored and connected with the waterway, and when the ammonia concentration in the cabin is monitored to exceed the standard, the capturing end begins to spray water mist to absorb the ammonia in the cabin. Further, the fresh water source comprises a technical water tank, and the seawater source comprises a seawater main pipe; The fresh water supply pipeline comprises three parallel fresh water branches, and the three fresh water branches are respectively provided with a fresh water pump and a fresh water valve; the seawater supply pipeline comprises three parallel seawater branches, and the three seawater branches are provided with seawater pumps and seawater valves. Further, a first normally open valve, a first filter valve, a first fresh water pump, a first check valve and a second normally open valve are sequentially arranged on the first fresh water branch from the technical water tank to the capturing end. Further, a first normally-closed valve, a second filter valve, a second fresh water pump, a second check valve and a second normally-closed valve are sequentially arranged on the second fresh water branch from the technical water tank to the capturing end. Further, a third normally open valve, a third filter valve, a fresh water booster pump, a third check valve and a fourth normally closed valve are sequentially arranged on the third fresh water branch from the technical water tank to the capturing end. Further, a third normally open valve, a fourth filter valve, a first seawater pump, a fourth check valve and a fourth normally open valve are sequentially arranged on the first seawater branch from the seawater main pipe to the capturing end. Further, a fifth normally closed valve, a fifth filter valve, a second seawater pump, a fifth check valve and a sixth normally closed valve are sequentially arranged on the second seawater branch from the seawater main pipe to the capturing end. Further, a seventh normally closed valve, a sixth filter valve, a seawater booster pump, a sixth check valve and an eighth normally closed valve are sequentially arranged on the third seawater branch path from the seawater main pipe to the capturing end. Further, the fresh water