CN116943394A - Ammonia power ship fuel leakage treatment system - Google Patents

Ammonia power ship fuel leakage treatment system Download PDF

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Publication number
CN116943394A
CN116943394A CN202310855479.6A CN202310855479A CN116943394A CN 116943394 A CN116943394 A CN 116943394A CN 202310855479 A CN202310855479 A CN 202310855479A CN 116943394 A CN116943394 A CN 116943394A
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China
Prior art keywords
ammonia
room
leakage
gas
lung
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CN202310855479.6A
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Inventor
李博洋
刘亚琦
孙志元
钟永健
赵晶
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Qingdao University of Science and Technology
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Qingdao University of Science and Technology
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Priority to CN202310855479.6A priority Critical patent/CN116943394A/en
Publication of CN116943394A publication Critical patent/CN116943394A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1412—Controlling the absorption process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/30—Controlling by gas-analysis apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/103—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/406—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

The invention provides a fuel leakage treatment system of an ammonia power ship, which comprises: a leakage gas supply system, a leakage treatment system, a ventilation system, a waste liquid discharge system and a water supply system. When ammonia leakage occurs on the ship, the system can lead the ammonia gas to be led into the space between two ammonia gases for alternate absorption treatment, so that the ammonia gas can be fully contacted with water, the system has sufficient reaction time to lead the ammonia gas to be repeatedly led into water and out of water for absorption, the absorption effect of the invention is very good, the problem that the ammonia gas absorption is not thorough due to the fact that the ammonia gas only passes through a spraying area of water once by adopting a spraying system is solved, and the problem that the ammonia gas is leaked into air due to the fact that a large number of small bubbles are contacted with liquid level to be broken by a method for leading the ammonia gas into water is solved, so that potential safety hazards possibly caused by ammonia gas leakage are greatly eliminated.

Description

Ammonia power ship fuel leakage treatment system
Technical Field
The invention belongs to the technical field of ships, and particularly relates to a fuel leakage treatment system of an ammonia power ship.
Background
In the face of increasingly severe decarbonizing forms, clean fuels are increasingly being appreciated by the shipping industry, and marine fuels are increasingly transitioning from traditional fossil energy sources to low-carbon and even zero-carbon energy sources. The ammonia component does not contain sulfur and carbon, and can realize zero carbon emission, so that the ammonia has good application prospect as marine fuel.
However, there is a certain safety hazard in the use of ammonia as a marine fuel. In the process of delivering ammonia fuel to a ship host, the ammonia fuel in a storage tank needs to be lightered and pressurized by a lightering pump, a booster pump and the like, various heating devices are also needed for heating and gasifying ammonia, and in addition, various valves, pipelines, pressure gauges and the like are needed in the process of delivering ammonia, so that leakage risks exist in components of the supply systems. Because ammonia has special dangers such as inflammability, explosiveness, toxicity and the like, once ammonia leakage occurs on a ship, the risk of fire explosion or personnel poisoning exists, so how to develop emergency treatment after the ammonia leakage has great significance for safe navigation of the ship.
The treatment measure of the prior art after the leakage of the ship ammonia fuel is that a spraying system is arranged on the ship, the principle is that the ammonia is very easy to dissolve in water, and when a leakage accident occurs, the ammonia in a leakage area is absorbed and treated in a spray water mode, so that potential safety hazards possibly caused by the leakage of the ammonia can be eliminated. The invention patent of the patent number CN115487648A provides a fuel leakage spray treatment device, which collects ammonia gas and sends the ammonia gas into a spray tank for absorption, but the absorption effect of the patent proposal on the ammonia gas is not very good, because: when ammonia leaks, the ammonia can diffuse into the air surrounding the leaking place, and a mixture of low-concentration ammonia and air can be formed after the ammonia is mixed with the air, although the ammonia is very soluble in water, the concentration of the ammonia is very low after the ammonia is mixed with the air, and the absorption effect of the ammonia is poor under the condition of low concentration of the ammonia, which has been described in the literature: cheng Zhiliang et al in the paper "hydrocjet air cyclone for the absorption treatment of ammonia in industrial exhaust gas" published in journal 35, journal 1, chemical progress, in 2016, proved by experiments: the lower the concentration of ammonia is, the poorer the absorption effect is, because the concentration of ammonia is reduced, the partial pressure of ammonia is reduced, and the partial pressure of ammonia at the gas-liquid phase interface is further reduced, so that the diffusion absorption rate of ammonia is reduced, and finally the absorption rate of ammonia is reduced. Therefore, the absorption effect of absorbing low-concentration ammonia gas by adopting a spraying system method is far less good than that of absorbing ammonia gas with higher concentration; in addition, ammonia can only pass through the spraying area of water once in the process of rising in the spray tank, and because water can not be guaranteed to contact with every ammonia molecule in the air mixture in the process of spraying, a large amount of ammonia which is not absorbed by water still exists after the ammonia passes through the spraying area. Thus, the current methods employing spray systems, while capable of absorbing a large portion of the leaked ammonia to some extent, have a small portion of the ammonia unabsorbed, and thus are still less than ideal on ships.
For this reason, a learner proposed a method of collecting ammonia gas directly into water, the ammonia gas floats a large number of small bubbles in the process of introducing water, and finally part of small bubbles contact with the surface of water to be ruptured. Although the method can make gas and liquid fully contact and improve the absorption rate of ammonia gas to a certain extent, a large number of small bubbles are formed in water by the method, each small bubble is a small sphere composed of ammonia gas and air, ammonia gas molecules on the wall surface of the bubble are easy to be absorbed by water, part of ammonia gas molecules near the center of the bubble are not easy to be absorbed by water due to a certain distance from water around the wall of the bubble, and ammonia gas wrapped by the bubble directly leaks into the air after the bubble is broken out of the water surface due to the fact that the method only passes ammonia gas into water for one time for absorption. Thus, this method of directly introducing ammonia into water still has the phenomenon that a small portion of the ammonia is not absorbed.
Based on the method, if an ammonia fuel leakage treatment system can be provided, the system can fully contact ammonia with water, and the system has enough reaction time to enable unreacted and thorough ammonia to be repeatedly introduced into water for absorption, the method can greatly improve the absorption effect of the ammonia, reduce the risk of accidents caused by ammonia fuel leakage, and has very high practical application value.
Disclosure of Invention
The invention aims to solve the problems and provides a fuel leakage treatment system of an ammonia power ship. The system includes a leakage gas supply system, a leakage treatment system, a ventilation system, a waste drain system, and a water supply system.
The leakage gas supply system includes: left leakage source, middle leakage source, right leakage source, fan, gas detector, discharge valve and admission valve.
The leakage handling system includes: left solenoid valve, right solenoid valve, left lung ammonia room, right lung ammonia room, gas nozzle, circulating fan, piston support, piston, initial position sensor, exhaust position sensor, extreme position sensor.
The ventilation system includes: a bleeder valve and an exhaust fan.
The waste drain system includes: a relief valve.
The water supply system includes: sea water pump.
In the leakage gas supply system, the left leakage source, the middle leakage source and the right leakage source are different places on the ship where ammonia leakage occurs, and gas detectors are arranged near the left leakage source, the middle leakage source and the right leakage source; the fans are provided with 3 groups, and the 3 groups of fans are respectively connected with a left leakage source, a middle leakage source and a right leakage source through pipelines; the air inlet valves are 3, the 3 air inlet valves are respectively connected with the 3 fans through pipelines, a pipeline is arranged between the fans and the air inlet valves and is connected with the atmosphere, and the pipeline is provided with an exhaust valve; the 3 air inlet valves are respectively connected with the left electromagnetic valve and the right electromagnetic valve through pipelines.
The heights between left pulmonary ammonia and right pulmonary ammonia are defined as H.
In the leakage treatment system, the left lung ammonia room and the right lung ammonia room are adjacent and are all arranged on a deck at the stern, the left lung ammonia room and the right lung ammonia room are completely the same and are all open cylinders, seawater is filled in the cylinders, the liquid level of the seawater is not more than 1/4*H, 5 gas nozzles are arranged at the bottoms of the left lung ammonia room and the right lung ammonia room, the 5 gas nozzles are connected in parallel, the gas nozzles in the left lung ammonia room are connected with a left electromagnetic valve through a pipeline, and the gas nozzles in the right lung ammonia room are connected with a right electromagnetic valve through a pipeline; piston brackets are arranged on the inner wall surfaces of the left lung ammonia gas room and the right lung ammonia gas room and at positions slightly higher than the liquid level; the piston is arranged above the piston support, is matched with the inner wall surfaces of the left lung ammonia room and the right lung ammonia room respectively, has a certain weight and can move up and down along the inner wall surfaces of the left lung ammonia room and the right lung ammonia room; the side walls of the left pulmonary ammonia room and the right pulmonary ammonia room are respectively provided with an initial position sensor, an exhaust position sensor and a limit position sensor, wherein the initial position sensors are arranged above the piston support, the limit position sensors are arranged at the bottoms of the left pulmonary ammonia room or the right pulmonary ammonia room, and the exhaust position sensors are slightly lower than the limit position sensors; circulating gas pipelines are arranged above the liquid level of the seawater in the left lung ammonia gas room and the right lung ammonia gas room, and the circulating fan and the gas nozzle are sequentially connected through the circulating gas pipelines to form a circulating loop.
In the ventilation system, exhaust pipelines are arranged at positions slightly lower than the piston support between the left lung ammonia gas and the right lung ammonia gas, the air release valve and the exhaust fan are sequentially connected through the exhaust pipelines, and the exhaust fan is connected with the atmosphere through the pipelines.
In the waste liquid discharge system, the bottoms of the left lung ammonia room and the right lung ammonia room are connected with a discharge valve and a waste liquid cabin in sequence through pipelines.
In the water supply system, the bottoms of the left lung ammonia room and the right lung ammonia room are respectively provided with a pipeline connected with the outside of the ship, and the pipelines are provided with sea water pumps.
And the control unit is arranged on the ship and can output signals to control the start and stop of each valve and each fan according to the received ammonia concentration information and the position information of the piston.
In the invention, a place where leakage occurs at 3 places is taken as an example, the left leakage source is a fuel storage chamber for placing an ammonia fuel storage tank on a ship, the middle leakage source is a vent of an outer tube of a double-wall tube, and the right leakage source is a place where leakage equipment occurs in an ammonia fuel supply system of the ship.
The invention defines the initial position of the piston when the piston contacts with the piston support, and the limit position of the piston when the piston moves to the top of the left pulmonary ammonia gas or the right pulmonary ammonia gas.
The terms left lung ammonia room and right lung ammonia room in the technical scheme of the invention are the same objects distributed at different positions on the ship, and can be collectively called as ammonia room in the technical scheme of the invention.
The left leakage source, the middle leakage source and the right leakage source of the fuel supply system need to be always ventilated during the navigation process of the ship. When no ammonia leakage occurs, the fan and the exhaust valve are always in an open state, and air near the left leakage source, the middle leakage source and the right leakage source is exhausted to the atmosphere by the fan, and all valves, the fan and the pump are in a closed state.
When the fuel supply system leaks ammonia gas, the gas detector in any place of the left leakage source, the middle leakage source and the right leakage source transmits detected ammonia gas leakage information to the control unit, the control unit outputs signals to control the opening of the air inlet valves in the corresponding leakage places, and simultaneously controls the closing of the air outlet valves corresponding to the corresponding leakage places, so that the mixed gas (air mixture for short) of the ammonia gas and the air is sent to the leakage processing system for absorption processing by the fan.
In the leakage treatment system, a control unit outputs a signal to control a left electromagnetic valve to be opened, an air mixture from a leakage gas supply system enters a left lung ammonia room through the left electromagnetic valve and then is sprayed out from a gas nozzle at the bottom of the left lung ammonia room, and then the ammonia is absorbed by utilizing seawater. When the fuel supply system leaks ammonia, the leaked gas supply system continuously supplies gas to the left lung ammonia, so that the piston is pushed to move upwards. When the piston reaches the limit position, the limit position sensor can transmit the position information of the piston to the control unit, so that the left electromagnetic valve is controlled to be closed, and the air supply between the left pulmonary ammonia gas is stopped. Meanwhile, the right electromagnetic valve is opened, and then the leaked ammonia gas is absorbed by the right lung ammonia gas, and the specific working principle is the same as that of the left lung ammonia gas.
When the ammonia is absorbed between the left lung ammonia and the right lung ammonia, the control unit outputs signals to control the circulating fans between the left lung ammonia and the right lung ammonia to be started, so that the gas between the piston and the liquid surface is pumped out, and the gas is circulated and introduced into water for circulating absorption.
In the process of carrying out absorption treatment on ammonia between right lung ammonia, when the piston reaches the position of an exhaust position sensor, the exhaust position sensor can transmit the position information of the piston to a control unit, so that a gas release valve and an exhaust fan between left lung ammonia are controlled to be opened, and a circulating fan is closed to exhaust gas in the left lung ammonia into the atmosphere. Because the left lung ammonia gas is continuously released to the outside in the exhaust process, the piston moves downwards, and when the piston moves downwards to an initial position, the initial position sensor can transmit the position information of the piston to the control unit, so that the air release valve and the air release fan between the left lung ammonia gas are controlled to be closed.
Further, if ammonia gas is still continuously leaked, when the piston between right pulmonary ammonia gas reaches the limit position, the limit position sensor transmits the position information of the piston to the control unit, so that the right electromagnetic valve is controlled to be closed, the right pulmonary ammonia gas is stopped to supply air, the left electromagnetic valve is controlled to be opened, the left pulmonary ammonia gas is switched to be continuously absorbed, the working principle is the same as that described above, the left pulmonary ammonia gas and the right pulmonary ammonia gas can alternately operate like two 'lungs' of a human body, and as long as the capacity of gas in one ammonia gas chamber reaches the limit, the right pulmonary ammonia gas is immediately switched to be continuously absorbed by the other ammonia gas chamber.
In the process of carrying out absorption treatment on ammonia again between the left lung ammonia, when the piston reaches the position of an exhaust position sensor, the exhaust position sensor can transmit the position information of the piston to a control unit, so that a gas release valve and an exhaust fan between the right lung ammonia are controlled to be opened, a circulating fan is closed, and gas in the right lung ammonia is discharged to the atmosphere. And the piston moves downwards in the exhaust process, and when the piston moves downwards to an initial position, the initial position sensor transmits the position information of the piston to the control unit, so that the air release valve and the exhaust fan between the right lung ammonia gas are controlled to be closed.
Further, after the left pulmonary ammonia gas or the right pulmonary ammonia gas is treated for a period of time, the corresponding relief valve is controlled to be opened by the output signal of the control unit, so that ammonia water in the left pulmonary ammonia gas or the right pulmonary ammonia gas is discharged into the waste liquid cabin, and further pollution discharge treatment is carried out after the subsequent treatment.
When the ammonia water in the left pulmonary ammonia gas or the right pulmonary ammonia gas is discharged, the discharge valve is closed, and then the seawater pump pumps the outboard seawater to be sent into the left pulmonary ammonia gas or the right pulmonary ammonia gas, and the left pulmonary ammonia gas and the right pulmonary ammonia gas can be continuously absorbed after water is changed.
The invention has the beneficial effects that:
1. when ammonia leakage occurs on the ship, the ammonia is introduced into the space between left pulmonary ammonia or right pulmonary ammonia for absorption, and enough time exists between the ammonia and the other ammonia to enable the ammonia which is not reacted thoroughly to be repeatedly introduced into water for absorption, so that the absorption effect of the invention is very good, the problem that ammonia absorption is not thorough due to the fact that ammonia can only pass through a spraying area of water once by adopting a spraying system is solved, and the problem that ammonia wrapped by bubbles leaks into air due to the fact that a large number of small bubbles are contacted with a liquid surface for cracking when the ammonia is introduced into water is solved.
2. The volume between the left pulmonary ammonia and the right pulmonary ammonia is larger, so that when the system is used for introducing the ammonia into the left pulmonary ammonia or the right pulmonary ammonia, the other ammonia is allowed to have more time to repeatedly and circularly introduce the unreacted ammonia into water for absorption, and the absorption effect of the ammonia is further improved.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a schematic view of the piston movement position in the present invention;
FIG. 3 is a schematic view of the installation position of the left and right pulmonary ammonia gas on a ship in the invention;
FIG. 4 is a schematic diagram of a control unit according to the present invention;
in the accompanying drawings: 1. a left leakage source; 2. a medium leakage source; 3. a right leakage source; 4. a blower; 5. a gas detector; 6. an exhaust valve; 7. an intake valve; 8. a left electromagnetic valve; 9. a right electromagnetic valve; 10. left lung ammonia room; 11. right lung ammonia room; 12. a gas nozzle; 13. a circulating fan; 14. a piston holder; 15. a piston; 16. an initial position sensor; 17. an exhaust position sensor; 18. a limit position sensor; 19. a release valve; 20. an exhaust fan; 21. a relief valve; 22. sea water pump.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples, wherein the terms "left", "middle" and "right" in the technical solutions of the present invention are defined according to the orientations in fig. 1, and are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
The system comprises a leakage gas supply system, a leakage treatment system, a ventilation system, a waste liquid discharge system and a water supply system.
As shown in fig. 1 and 2, the leakage gas supply system includes: a left leakage source 1, a middle leakage source 2, a right leakage source 3, a fan 4, a gas detector 5, an exhaust valve 6 and an intake valve 7.
The leakage handling system includes: the device comprises a left electromagnetic valve 8, a right electromagnetic valve 9, a left pulmonary ammonia room 10, a right pulmonary ammonia room 11, a gas nozzle 12, a circulating fan 13, a piston bracket 14, a piston 15, an initial position sensor 16, an exhaust position sensor 17 and a limit position sensor 18.
The ventilation system includes: a bleed valve 19 and an exhaust fan 20.
The waste drain system includes: a relief valve 21.
The water supply system includes: sea water pump 22.
In the leakage gas supply system, the left leakage source 1, the middle leakage source 2 and the right leakage source 3 are different places on the ship where ammonia gas leakage occurs, and gas detectors 5 are arranged near the left leakage source 1, the middle leakage source 2 and the right leakage source 3; the fans 4 are provided with 3 groups, and the 3 groups of fans 4 are respectively connected with the left leakage source 1, the middle leakage source 2 and the right leakage source 3 through pipelines; the air inlet valves 7 are provided with 3 air inlet valves 7, the 3 air inlet valves 7 are respectively connected with the 3 fans 4 through pipelines, a pipeline connected with the atmosphere is arranged between the fans 4 and the air inlet valves 7, and the pipeline is provided with an exhaust valve 6; the 3 air inlet valves 7 are respectively connected with the left electromagnetic valve 8 and the right electromagnetic valve 9 through pipelines.
The heights of the left pulmonary ammonia room 10 and the right pulmonary ammonia room 11 are defined as H.
As shown in fig. 3, in the leakage treatment system, the left pulmonary ammonia room 10 and the right pulmonary ammonia room 11 are adjacent and are all installed on a deck at the stern, the left pulmonary ammonia room 10 and the right pulmonary ammonia room 11 are completely the same and are all open cylinders, seawater is filled in the cylinders, the liquid level of the seawater is not more than 1/4*H, 5 gas nozzles 12 are arranged at the bottoms of the left pulmonary ammonia room 10 and the right pulmonary ammonia room 11, the 5 gas nozzles 12 are connected in parallel, the gas nozzles 12 in the left pulmonary ammonia room 10 are connected with the left electromagnetic valve 8 through pipelines, and the gas nozzles 12 in the right pulmonary ammonia room 11 are connected with the right electromagnetic valve 9 through pipelines; the piston supports 14 are arranged on the inner wall surfaces of the left ammonia gas room 10 and the right ammonia gas room 11 and at positions slightly higher than the liquid level, the piston supports 14 support the pistons 15, the pistons 15 are arranged above the piston supports 14 and are respectively matched with the inner wall surfaces of the left ammonia gas room 10 and the right ammonia gas room 11, and the pistons 15 have a certain weight and can move up and down along the inner wall surfaces of the left ammonia gas room 10 and the right ammonia gas room 11; the side walls of the left pulmonary ammonia room 10 and the right pulmonary ammonia room 11 are respectively provided with an initial position sensor 16, an exhaust position sensor 17 and a limit position sensor 18, wherein the initial position sensor 16 is arranged above the piston support 14, the limit position sensor 18 is arranged at the bottom of the left pulmonary ammonia room 10 or the right pulmonary ammonia room 11, and the exhaust position sensor 17 is slightly lower than the limit position sensor 18; circulating gas pipelines are arranged above the liquid level of seawater in the left lung ammonia room 10 and the right lung ammonia room 11, and the circulating fan 13 and the gas nozzle 12 are sequentially connected through the circulating gas pipelines to form a circulating loop.
In the ventilation system, the positions of the left lung ammonia room 10 and the right lung ammonia room 11 which are slightly lower than the piston support 14 are respectively provided with an exhaust pipeline, the air release valve 19 and the exhaust fan 20 are sequentially connected through the exhaust pipelines, and the exhaust fan 20 is connected with the atmosphere through the pipelines.
In the waste liquid discharge system, the bottoms of the left lung ammonia room 10 and the right lung ammonia room 11 are sequentially connected with a discharge valve 21 and a waste liquid cabin through pipelines.
In the water supply system, the bottoms of the left lung ammonia room 10 and the right lung ammonia room 11 are respectively provided with a pipeline connected with the outside of the ship, and the pipelines are provided with a seawater pump 22.
As shown in fig. 4, in the ship, a control unit is provided, and the control unit outputs signals to control the start and stop of each valve and each fan according to the received ammonia leakage information and the position information of the piston 15.
In the invention, taking the place where leakage occurs at 3 as an example, the left leakage source 1 is a fuel storage chamber for placing an ammonia fuel storage tank on a ship, the middle leakage source 2 is a vent of an outer pipe of a double-wall pipe, and the right leakage source 3 is the place where leakage equipment of a ship ammonia fuel supply system occurs.
The present invention defines the position of the piston 15 when it contacts the piston holder 14 as the initial position and the position of the piston 15 when it moves to the top of the left lung ammonia room 10 or the right lung ammonia room 11 as the limit position.
The terms left lung ammonia room and right lung ammonia room in the technical scheme of the invention are similar objects distributed at different positions on the ship, and can be collectively called as ammonia room in the technical scheme of the invention.
The left leakage source 1, the middle leakage source 2 and the right leakage source 3 of the fuel supply system need to be always ventilated during the ship sailing. When no ammonia leakage occurs, the fan 4 and the exhaust valve 6 are always in an open state, and air near the left leakage source 1, the middle leakage source 2 and the right leakage source 3 is exhausted to the atmosphere by the fan 4, and all valves, fans and pumps are in a closed state.
When the fuel supply system leaks ammonia gas, the gas detector 5 at any place of the left leakage source 1, the middle leakage source 2 and the right leakage source 3 transmits detected ammonia gas leakage information to the control unit, the control unit outputs a signal to control the opening of the air inlet valve 7 at the corresponding leakage place, and simultaneously controls the closing of the air outlet valve 6 corresponding to the corresponding leakage place, so that the mixed gas (abbreviated as air mixture) of ammonia gas and air is sent to the leakage processing system for absorption processing by the fan 4.
In the leakage treatment system, a control unit outputs a signal to control the left electromagnetic valve 8 to be opened, an air mixture from a leakage gas supply system enters the left lung ammonia room 10 through the left electromagnetic valve 8, and then is sprayed out from a gas nozzle 12 at the bottom of the left lung ammonia room 10, and further, ammonia is absorbed by utilizing seawater. When the fuel supply system leaks ammonia gas, the leaked gas supply system continuously supplies gas to the left lung ammonia gas room 10, so that the piston 15 is pushed to move upwards. When the piston 15 reaches the limit position, the limit position sensor 18 transmits the position information of the piston 15 to the control unit, so as to control the left electromagnetic valve 8 to be closed and stop the air supply to the left lung ammonia room 10. Simultaneously, the right electromagnetic valve 9 is opened, and then the leaked ammonia gas is absorbed by the right lung ammonia gas room 11, and the specific working principle is the same as that of the left lung ammonia gas room 10.
When the leakage treatment system absorbs ammonia, a large amount of small bubbles are formed after the air mixture is sprayed out from the gas nozzle 12, after the small bubbles contact the surface of water and are broken, the gas wrapped in the small bubbles is released into a sealed space between the piston 15 and the liquid surface, and the main component of the gas is the mixture of the unreacted ammonia and the air thoroughly.
In the process of absorbing the ammonia gas by the right lung ammonia gas room 11, when the piston 15 reaches the position of the exhaust position sensor 17, the exhaust position sensor 17 transmits the position information of the piston 15 to the control unit, so as to control the air release valve 19 and the exhaust fan 20 of the left lung ammonia gas room 10 to be opened, and the circulating fan 13 to be closed, so that the air in the left lung ammonia gas room 10 is discharged to the atmosphere. Since the left lung ammonia room 10 continuously releases gas to the outside in the exhaust process, the piston 15 moves downward, and when the primary piston 15 moves downward to the initial position, the initial position sensor 16 transmits the position information of the piston 15 to the control unit, so as to control the air release valve 19 and the air release fan 20 of the left lung ammonia room 10 to be closed.
Further, if ammonia gas is still continuously leaked, when the piston 15 of the right lung ammonia gas room 11 reaches the limit position, the limit position sensor 18 transmits the position information of the piston 15 to the control unit, so as to control the right electromagnetic valve 9 to be closed, stop the gas supply of the right lung ammonia gas room 11, and simultaneously control the left electromagnetic valve 8 to be opened, and then switch into the left lung ammonia gas room 10 to continuously absorb the ammonia gas, the working principle is the same as the above, and the left lung ammonia gas room 10 and the right lung ammonia gas room 11 can alternately operate like two 'lungs' of a human body, and immediately switch into another ammonia gas room to continuously absorb the ammonia gas as long as the capacity of the gas in one ammonia gas room reaches the limit.
In the process of absorbing the ammonia gas again by the left lung ammonia gas room 10, when the piston 15 reaches the position of the exhaust position sensor 17, the exhaust position sensor 17 transmits the position information of the piston 15 to the control unit, so as to control the air release valve 19 and the exhaust fan 20 of the right lung ammonia gas room 11 to be opened, and the circulating fan 13 to be closed, so that the air in the right lung ammonia gas room 11 is discharged to the atmosphere. The piston 15 moves downwards in the exhaust process, and when the piston 15 moves downwards to the initial position, the initial position sensor 16 transmits the position information of the piston 15 to the control unit, so as to control the air release valve 19 and the exhaust fan 20 of the right lung ammonia room 11 to be closed.
If the spraying system is installed on the ship, the ammonia gas which is not available for reaction with water can directly leak into the air because the ammonia gas can only pass through the spraying area once in the rising process; if ammonia is collected and directly introduced into water, a large number of small bubbles float in the process of introducing the ammonia into the water, and after part of the small bubbles float out of the water surface and break, the ammonia wrapped by the small bubbles also directly leaks into the air, so that the problem of unsatisfactory ammonia absorption effect exists no matter the traditional spraying system method or the method of directly introducing the ammonia into the water is adopted. In the process of absorbing the leaked ammonia gas in one ammonia gas chamber, when the piston 15 moves to the limit position, the piston 15 is switched to the other ammonia gas chamber for absorbing treatment, and as the time required for the piston 15 in one ammonia gas chamber to move from the initial position to the limit position is long, the other ammonia gas chamber can have enough reaction time to enable the unreacted and thorough ammonia gas to be repeatedly introduced into water for absorbing for a plurality of times, and the complete absorption of the ammonia gas can be almost realized after the air mixture in the ammonia gas chamber is repeatedly introduced into water for absorbing for a plurality of times, so that the absorption effect of the ammonia gas chamber is very good.
Further, after the left pulmonary ammonia room 10 or the right pulmonary ammonia room 11 is treated for a period of time, the control unit outputs a signal to control the corresponding relief valve 21 to be opened, so that the ammonia water in the left pulmonary ammonia room 10 or the right pulmonary ammonia room 11 is discharged into the waste liquid cabin, and further sewage disposal is performed later.
When the ammonia water in the left lung ammonia gas room 10 or the right lung ammonia gas room 11 is discharged, the discharge valve 21 is closed, and then the outboard seawater is pumped by the seawater pump 22 and is sent into the left lung ammonia gas room 10 or the right lung ammonia gas room 11, and the ammonia gas absorption can be continuously carried out after the water between the left lung ammonia gas room 10 and the right lung ammonia gas room 11 is changed.
In order to make the absorption effect of the system better, the volume between the left lung ammonia gas 10 and the right lung ammonia gas 11 in the invention can be processed slightly more in the actual production process, the larger the volume between the ammonia gas is, the longer the piston 15 reaches the limit position, the longer the treatment time between the ammonia gas of the left lung 10 or the right lung ammonia gas is, so that the other ammonia gas can have more time to make the unreacted and thorough ammonia gas repeatedly introduced into water for absorption, thereby further improving the absorption effect of the ammonia gas.
The specific embodiment of the leakage of ammonia gas is described by taking 3 leakage sites as an example, and similarly, if ammonia gas leaks in other places possibly leaking on the ship, the ammonia gas can be introduced into the leakage treatment system for treatment by adopting the method, so that the problem of ammonia gas leakage in more places is solved, and the working principle is the same as that described above.
The foregoing is merely a preferred embodiment of the present invention, but is not limited to the examples described above, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims (7)

1. An ammonia power ship fuel leakage treatment system, characterized in that: the system comprises a leakage gas supply system, a leakage treatment system, a ventilation system, a waste liquid discharge system and a water supply system;
the leakage gas supply system includes: a left leakage source (1), a middle leakage source (2), a right leakage source (3), a fan (4), a gas detector (5), an exhaust valve (6) and an air inlet valve (7); the leakage handling system includes: a left electromagnetic valve (8), a right electromagnetic valve (9), a left pulmonary ammonia room (10), a right pulmonary ammonia room (11), a gas nozzle (12), a circulating fan (13), a piston bracket (14), a piston (15), an initial position sensor (16), an exhaust position sensor (17) and a limit position sensor (18); the ventilation system includes: a release valve (19) and an exhaust fan (20); the waste drain system includes: a relief valve (21); the water supply system includes: a sea water pump (22);
the left lung ammonia room (10) and the right lung ammonia room (11) are adjacent and are all arranged on the deck of the stern, the left lung ammonia room (10) and the right lung ammonia room (11) are completely the same and are all open cylinders, seawater is filled in the ammonia room, and the liquid level of the seawater is not more than 1/4 of the height of the ammonia room; the bottoms of the left lung ammonia room (10) and the right lung ammonia room (11) are respectively provided with 5 gas nozzles (12), the 5 gas nozzles (12) are connected in parallel, the gas nozzles (12) in the left lung ammonia room (10) are connected with the left electromagnetic valve (8) through pipelines, and the gas nozzles (12) in the right lung ammonia room (11) are connected with the right electromagnetic valve (9) through pipelines; piston brackets (14) are arranged on the inner wall surfaces of the left lung ammonia room (10) and the right lung ammonia room (11) at positions slightly higher than the liquid level; the piston (15) is arranged above the piston support (14) and is respectively matched with the inner wall surfaces of the left lung ammonia room (10) and the right lung ammonia room (11); the side walls of the left lung ammonia room (10) and the right lung ammonia room (11) are respectively provided with an initial position sensor (16), an exhaust position sensor (17) and a limit position sensor (18), wherein the initial position sensor (16) is arranged above the piston support (14), the limit position sensor (18) is arranged at the bottom of the left lung ammonia room (10) or the right lung ammonia room (11), and the exhaust position sensor (17) is slightly lower than the limit position sensor (18); circulating gas pipelines are arranged above the liquid level of seawater in the left lung ammonia gas room (10) and the right lung ammonia gas room (11), and the circulating fan (13) and the gas nozzle (12) are sequentially connected through the circulating gas pipelines to form a circulating loop.
2. An ammonia power boat fuel leakage processing system as defined in claim 1 wherein: the left leakage source (1), the middle leakage source (2) and the right leakage source (3) are different places on the ship where ammonia leakage occurs, and gas detectors (5) are arranged near the left leakage source (1), the middle leakage source (2) and the right leakage source (3); the fans (4) are provided with 3 groups, and the 3 groups of fans (4) are respectively connected with the left leakage source (1), the middle leakage source (2) and the right leakage source (3) through pipelines; the air inlet valves (7) are 3, the 3 air inlet valves (7) are respectively connected with the 3 fans (4) through pipelines, a pipeline connected with the atmosphere is arranged between the fans (4) and the air inlet valves (7), and the pipeline is provided with an exhaust valve (6); the 3 air inlet valves (7) are respectively connected with the left electromagnetic valve (8) and the right electromagnetic valve (9) through pipelines.
3. An ammonia power boat fuel leakage processing system as defined in claim 1 wherein: and a control unit is arranged on the ship, and the control unit outputs signals to control the start and stop of each valve and each fan according to the received ammonia concentration information and the position information of the piston (15).
4. An ammonia power boat fuel leakage processing system as defined in claim 1 wherein: the left lung ammonia room (10) and the right lung ammonia room (11) are respectively provided with an exhaust pipeline at a position slightly lower than the piston support (14), the air release valve (19) and the exhaust fan (20) are sequentially connected through the exhaust pipelines, and the exhaust fan (20) is connected with the atmosphere through the pipelines.
5. An ammonia powered boat fuel leakage processing system as defined in claim 1 and claim 2 wherein: the left leakage source (1) is a fuel storage chamber for placing an ammonia fuel storage tank on a ship, the middle leakage source (2) is a vent of an outer tube of a double-wall tube, and the right leakage source (3) is a place where leakage equipment of a ship ammonia fuel supply system is located.
6. An ammonia power boat fuel leakage processing system as defined in claim 1 wherein: the bottoms of the left lung ammonia room (10) and the right lung ammonia room (11) are connected with a bleeder valve (21) and a waste liquid cabin in sequence through pipelines.
7. An ammonia power boat fuel leakage processing system as defined in claim 1 wherein: the bottoms of the left lung ammonia room (10) and the right lung ammonia room (11) are respectively provided with a pipeline connected with the outside of the board, and the pipeline is provided with a seawater pump (22).
CN202310855479.6A 2023-07-13 2023-07-13 Ammonia power ship fuel leakage treatment system Pending CN116943394A (en)

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Application Number Priority Date Filing Date Title
CN202310855479.6A CN116943394A (en) 2023-07-13 2023-07-13 Ammonia power ship fuel leakage treatment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310855479.6A CN116943394A (en) 2023-07-13 2023-07-13 Ammonia power ship fuel leakage treatment system

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Publication Number Publication Date
CN116943394A true CN116943394A (en) 2023-10-27

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CN202310855479.6A Pending CN116943394A (en) 2023-07-13 2023-07-13 Ammonia power ship fuel leakage treatment system

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