CN211924353U - Marine liquid ammonia fuel feed system - Google Patents
Marine liquid ammonia fuel feed system Download PDFInfo
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- CN211924353U CN211924353U CN202020412377.9U CN202020412377U CN211924353U CN 211924353 U CN211924353 U CN 211924353U CN 202020412377 U CN202020412377 U CN 202020412377U CN 211924353 U CN211924353 U CN 211924353U
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Abstract
The utility model provides a marine liquid ammonia fuel feed system, has ammonia fuel host computer, liquid ammonia fuel storage tank, ammonia fuel conveying system and ammonia liquefaction system, is provided with the liquid ammonia low-pressure pump in the liquid ammonia fuel storage tank, and the liquid ammonia low-pressure pump has connected gradually the daily buffer tank of liquid ammonia, liquid ammonia booster pump, first valve, liquid ammonia heater, liquid ammonia and supplies buffer tank, pressure regulating valves and ammonia fuel host computer, forms ammonia fuel conveying system. The liquid ammonia fuel storage tank is connected with an ammonia compressor through a pipeline, the ammonia compressor is sequentially connected with an ammonia precooler and an ammonia liquefying device, and the liquefied liquid ammonia is sent back to the liquid ammonia fuel storage tank by the ammonia liquefying device to form an ammonia liquefying system. The invention adopts liquid ammonia as the fuel of the propulsion system of the marine main engine, basically realizes zero carbon emission without considering the consumption of a small amount of ignition oil, and has great environmental protection benefit.
Description
Technical Field
The invention relates to a marine fuel supply system, in particular to a marine liquid ammonia fuel supply system which adopts liquid ammonia as a fuel supply host.
Background
The global warming phenomenon is intensified at present, so that extreme climate phenomena and natural disasters around the world are frequent, and the main cause of the phenomenon is greenhouse gas emission represented by CO 2. In the field of ship shipping, the latest EEDI standard for carbon emission is also set by the international maritime organization IMO, and over time, the standard puts higher demands on ship design, ship corollary equipment, new energy technology application and the like.
Ammonia (-33.6 ℃, 1 atmosphere pressure, liquid state) is an important chemical raw material, and has wide application in the fields of chemical medicine and pesticide, national defense industry, metallurgical industry and the like, and as early as the 20 th century in the 60 th, engines using ammonia as fuel have been practically applied in the fields of automobiles, ships, space rockets and the like. Ammonia is stored and transported in a liquid state, has mature application on land, can be used as fuel for combustion, is only nitrogen and water as the combustion product because the combustion product contains no sulfur, does not have the problems of carbon emission and sulfur emission, and is clean fuel. At present, German Man group develops a dual-fuel low-speed host machine capable of burning liquid ammonia fuel, liquid ammonia with pressure of 50bar is sprayed into a cylinder for burning, and the ship application of the machine type can realize zero-carbon and zero-sulfur emission of a propulsion system of a ship host machine, and has environmental protection value.
However, the ammonia fuel low-speed host adopts a diesel cycle, the exhaust gas discharged by the ammonia fuel low-speed host still contains nitrogen oxides such as NO, NO2 and the like, and does not meet the discharge standard of IMO tier III for the nitrogen oxides, aiming at the situation, the traditional method is to additionally increase a set of host exhaust gas after-treatment device SCR reactor device, the SCR reactor device is mixed with the exhaust gas in a urea spraying mode, the mixed gas passes through the SCR reactor and undergoes a reduction reaction under a catalyst, the nitrogen oxides in the exhaust gas are reduced into N2, the reaction additionally generates CO2 and water, and the exhaust gas is discharged to the atmosphere; however, in the treatment mode, an additional urea storage, injection, cleaning, soot blowing and other systems are needed, and the CO2 is doped in the tail gas after reaction because urea is used as a reducing agent, so that the tail gas of the engine treats nitrogen oxides, but the emission cannot achieve zero-carbon emission.
The ammonia fuel used by the ammonia fuel engine is stored in a liquid state on the ship to save fuel storage space. According to the requirements of ship type, ship size, endurance and the like, liquid ammonia storage tanks with different volumes, different types and different design pressures are adopted, and the liquid ammonia storage tanks are generally divided into a semi-cold semi-pressure type (design temperature is minus 40 ℃, design pressure is 4-10 barg, and the type C storage tank) and a fully-cold type (design temperature is minus 40 ℃, design pressure is 0.7barg, and the type B storage tank or a film type storage tank). Liquid ammonia is volatile, has the toxicity, because the continuous infiltration of external heat liquid ammonia fuel storage tank leads to liquid ammonia constantly to volatilize, and the ammonia of volatilizing is gathered in the fuel storage tank, will lead to storage tank pressure to rise, if not handle ammonia in time and volatilize gas, will lead to the relief valve to take off the jump accident, liquid ammonia fuel storage tank structural damage even.
Disclosure of Invention
In order to solve the above problems, the present invention provides a marine liquid ammonia fuel supply system, which aims to provide a clean and environment-friendly ammonia fuel for ships and ensure the storage safety of the ammonia fuel in the running process of the ships, and adopts the following technical scheme:
the utility model provides a marine liquid ammonia fuel feed system, has ammonia fuel host computer, liquid ammonia fuel storage tank, ammonia fuel conveying system and ammonia liquefaction system, is provided with the liquid ammonia low-pressure pump in the liquid ammonia fuel storage tank, and the liquid ammonia low-pressure pump has connected gradually the daily buffer tank of liquid ammonia, liquid ammonia booster pump, first valve, liquid ammonia heater, liquid ammonia and supplies buffer tank, pressure regulating valves and ammonia fuel host computer, forms ammonia fuel conveying system. According to the invention, a fuel supply pressure of 50bar is established by the liquid ammonia low-pressure pump and the liquid ammonia booster pump, liquid ammonia is pumped out from the liquid ammonia fuel storage tank, is conveyed to the liquid ammonia heater through the first valve, the temperature of the liquid ammonia fuel is regulated by the liquid ammonia heater to reach the supply temperature of 45 +/-10 ℃ required by the ammonia fuel host, and the heated ammonia fuel is supplied to the host for use. A liquid ammonia supply buffer tank is arranged between the liquid ammonia heater and the ammonia fuel host, and the pressure of the buffer system fluctuates.
The liquid ammonia fuel storage tank is connected with an ammonia compressor through a pipeline, the ammonia compressor is sequentially connected with an ammonia precooler and an ammonia liquefying device, and the liquefied liquid ammonia is sent back to the liquid ammonia fuel storage tank by the ammonia liquefying device to form an ammonia liquefying system. The ammonia liquefaction system is provided with an ammonia compressor, ammonia volatile gas in the liquid ammonia fuel storage tank flows into the ammonia compressor through a pipeline, the ammonia compressor is respectively connected with an ammonia gas buffer tank and an ammonia pre-cooler through pipelines, the ammonia pre-cooler is connected with the ammonia liquefaction device, and the ammonia liquefaction device is connected with the ammonia fuel storage tank through a pipeline to form a loop.
The ammonia gas liquefaction system can fully guarantee the safety of the whole power system, when excessive ammonia gas is generated in the liquid ammonia fuel storage tank, and when an engine is stopped or the engine tail gas treatment system cannot be completely consumed, the volatilized ammonia gas is compressed into liquid ammonia through the ammonia gas compressor and the ammonia liquefaction device, and is conveyed back to the liquid ammonia fuel storage tank through the pipeline. By providing the ammonia gas pre-cooler, the power consumption of the ammonia liquefaction device can be reduced, and the heat supply of the liquid ammonia heater can be reduced. Through ammonia liquefaction device, reduce the gaseous phase pressure in liquid ammonia fuel storage tank, guarantee system safety. The gas in the ammonia gas buffer tank comes from two parts, one part comes from an ammonia gas compressor, and the other part comes from a liquid ammonia evaporator.
In the above marine liquid ammonia fuel supply system, further, the ammonia gas pre-cooler is respectively connected with the liquid ammonia booster pump and the liquid ammonia heater, a second valve is arranged between the ammonia gas pre-cooler and the liquid ammonia booster pump, and a third valve is arranged between the ammonia gas pre-cooler and the liquid ammonia heater. And adjusting the valve according to different navigation conditions to control the system to operate and ensure the system to operate safely.
In the above marine liquid ammonia fuel supply system, further, the liquid ammonia heater is connected with the water glycol heater, the main boiler and the water glycol circulating pump in sequence through pipelines to form a first circulating network. The cold energy released by the liquid ammonia heater is provided for the main machine boiler or the main machine cylinder liner water, and the heat energy released by the main machine boiler and the main machine cylinder liner water is provided for the liquid ammonia heater.
In the above marine liquid ammonia fuel supply system, further, the main shaft of the ammonia fuel main engine is connected with a gear box, and the gear box is connected with a shaft generator.
In the above marine liquid ammonia fuel supply system, preferably, a water glycol heat exchange medium flows through the first circulation network. The water glycol heat exchange medium exchanges heat at the water glycol heater, heat released by water in a cylinder sleeve of the main machine or steam of the boiler is transferred to the water glycol heat exchange medium to form a high-temperature water glycol heat exchange medium, the high-temperature water glycol heat exchange medium flows through the water glycol circulating pump to exchange heat at the liquid ammonia heater, heat is supplied to the liquid ammonia heater, and the liquid ammonia heater is powered by running. Cold energy released by the liquid ammonia heater is transferred to the water-ethylene glycol heat exchange medium, and after heat exchange, the low-temperature water-ethylene glycol heat exchange medium returns to supply energy to the main machine boiler or the main machine cylinder sleeve water.
In the above marine liquid ammonia fuel supply system, preferably, the second valve and the third valve are connected in parallel with the first valve. Because only the main engine can adopt ammonia fuel, the invention arranges a gear box on the main shaft of the main engine, is connected to a shaft generator, realizes the power generation of the ammonia fuel by utilizing the abundant power of the main engine, and supplies the power to the ship power grid, thereby solving the problem of the power demand of the ship without configuring other fuel generators.
The invention has the beneficial effects that:
1. the invention adopts liquid ammonia as the fuel of the propulsion system of the marine main engine, basically realizes zero carbon emission without considering the consumption of a small amount of ignition oil, and has great environmental protection benefit.
2. The ammonia liquefaction device is adopted to realize the reliquefaction treatment of the volatile gas in the liquid ammonia fuel storage tank, so that the pressure rise and the structural damage of the liquid ammonia fuel storage tank caused by the continuous accumulation of the ammonia volatile gas are avoided, the emission of a large amount of ammonia volatile gas to the atmosphere is avoided, and the safety of the liquid ammonia fuel storage tank and a ship is ensured.
3. The ammonia gas pre-cooler is arranged in front of the ammonia liquefaction device, and the cold energy carried by the liquid ammonia fuel at the outlet of the liquid ammonia booster pump is used for pre-cooling the ammonia volatile gas, so that the power consumption of the ammonia liquefaction device can be reduced; meanwhile, as the temperature of the liquid ammonia fuel at the outlet of the booster pump is increased, the heat supply requirement of the liquid ammonia heater is further reduced, and finally the heat source consumption of the ship is saved.
4. The invention adopts the scheme that the liquid ammonia fuel host is matched with the gear box and the shaft generator, realizes the power supply of the ship, does not adopt a fuel oil or other fuel generators, and further ensures zero carbon emission of the power system.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
wherein: the system comprises a 1-liquid ammonia fuel storage tank, a 2-liquid ammonia low-pressure pump, a 3-liquid ammonia daily tank, a 4-liquid ammonia booster pump, a 5-liquid ammonia heater, a 6-liquid ammonia supply buffer tank, a 7-pressure regulating valve bank, an 8-ammonia fuel host, a 9-ammonia compressor, a 10-ammonia precooler, an 11-ammonia liquefying device, a 12-first valve, a 13-second valve, a 14-third valve, a 15-gear box, a 16-axial belt generator, a 17-water glycol heater, an 18-water glycol circulating pump and a 19-host boiler.
Detailed Description
As shown in fig. 1, the marine liquid ammonia fuel supply system comprises a liquid ammonia fuel storage tank 1, a liquid ammonia low-pressure pump 2 is arranged in the liquid ammonia fuel storage tank, and the liquid ammonia low-pressure pump is sequentially connected with a liquid ammonia daily buffer tank 3, a liquid ammonia booster pump 4, a first valve 12, a liquid ammonia heater 5, a liquid ammonia supply buffer tank 6, a pressure regulating valve bank 7 and an ammonia fuel host 8 to form an ammonia fuel delivery system. The liquid ammonia fuel storage tank is connected with an ammonia compressor 9 through a pipeline, the ammonia compressor is sequentially connected with an ammonia precooler 10 and an ammonia liquefying device 11, and the liquefied liquid ammonia is sent back to the liquid ammonia fuel storage tank by the ammonia liquefying device to form an ammonia liquefying system. The main shaft of the ammonia fuel main engine is connected with a gear box 15, and the gear box is connected with a shaft generator 16.
The ammonia precooler is respectively connected with the liquid ammonia booster pump and the liquid ammonia heater, a second valve 13 is arranged between the ammonia precooler and the liquid ammonia booster pump, and a third valve 14 is arranged between the ammonia precooler and the liquid ammonia heater. The liquid ammonia heater is connected with a water glycol heater 17, a host boiler 19 and a water glycol circulating pump 18 in sequence through pipelines to form a first circulating network, and a water glycol heat exchange medium flows through the first circulating network.
Example 1
When the volatilized ammonia gas in the liquid ammonia fuel storage tank is accumulated, and the pressure in the liquid ammonia fuel storage tank reaches a set value, the first valve is closed, and the second valve and the third valve are opened. And (2) starting an ammonia gas compressor, pumping out volatile gas in the liquid ammonia fuel storage tank, enabling the ammonia gas to flow through an ammonia gas precooler, precooling the ammonia gas at the ammonia gas precooler, enabling the cooled ammonia gas to enter an ammonia liquefying device, processing the cooled ammonia gas by the ammonia liquefying device to form liquid ammonia, and conveying the liquid ammonia into the liquid ammonia fuel storage tank.
And the liquid ammonia low-pressure pump pressurizes the liquid ammonia to 18bar, pumps the liquid ammonia out of the liquid ammonia fuel storage tank and conveys the liquid ammonia to a liquid ammonia daily tank. Liquid ammonia fuel in the daily jar of liquid ammonia is inhaled to liquid ammonia booster pump, at this moment, the liquid ammonia booster pump pressurizes liquid ammonia to 50bar, liquid ammonia fuel after the pressure boost passes through the second valve, the ammonia precooler, the third valve, get into in the liquid ammonia heater, through the heating of liquid ammonia heater, form the high temperature liquid ammonia fuel of temperature at 45 +/-10 ℃, the buffer tank is supplied with to high temperature liquid ammonia fuel through liquid ammonia, the pressure regulating valves, supply with the buffer tank and the pressure regulating valves pressure regulation back through liquid ammonia, carry to in the ammonia fuel host computer, supply with the burning of ammonia fuel host computer. And the liquid ammonia fuel exchanges heat with ammonia gas at the ammonia gas precooler, and the heated liquid ammonia fuel enters a liquid ammonia heater.
Example 2
When the pressure in the liquid ammonia fuel storage tank is reduced to a set value, the ammonia compressor and the ammonia liquefaction device are closed, the second valve and the third valve are closed, the first valve is opened, and at the moment, the volatile gas in the liquid ammonia fuel storage tank is not liquefied again. Liquid ammonia booster pump export liquid ammonia fuel passes through liquid ammonia day jar, liquid ammonia booster pump, first valve, liquid ammonia heater, liquid ammonia supply buffer tank, pressure regulating valves in proper order, provides ammonia fuel host computer.
Claims (6)
1. A marine liquid ammonia fuel supply system characterized by: the ammonia fuel system comprises an ammonia fuel host (8), a liquid ammonia fuel storage tank (1), an ammonia fuel delivery system and an ammonia liquefaction system, wherein a liquid ammonia low-pressure pump (2) is arranged in the liquid ammonia fuel storage tank, and is sequentially connected with a liquid ammonia daily buffer tank (3), a liquid ammonia booster pump (4), a first valve (12), a liquid ammonia heater (5), a liquid ammonia supply buffer tank (6), a pressure regulating valve bank (7) and the ammonia fuel host to form the ammonia fuel delivery system;
the liquid ammonia fuel storage tank is connected with an ammonia compressor through a pipeline, the ammonia compressor (9) is sequentially connected with an ammonia precooler (10) and an ammonia liquefying device (11), and the liquefied liquid ammonia is sent back to the liquid ammonia fuel storage tank by the ammonia liquefying device to form an ammonia liquefying system.
2. A marine liquid ammonia fuel supply system as claimed in claim 1, wherein: the ammonia precooler is respectively connected with the liquid ammonia booster pump and the liquid ammonia heater, a second valve (13) is arranged between the ammonia precooler and the liquid ammonia booster pump, and a third valve (14) is arranged between the ammonia precooler and the liquid ammonia heater.
3. A marine liquid ammonia fuel supply system as claimed in claim 1, wherein: the liquid ammonia heater is connected with a water glycol heater (17), a main boiler (19) and a water glycol circulating pump (18) in sequence through pipelines to form a first circulating network.
4. A marine liquid ammonia fuel supply system as claimed in claim 1, wherein: the main shaft of the ammonia fuel main engine is connected with a gear box (15), and the gear box is connected with a shaft generator (16).
5. A marine liquid ammonia fuel supply system as claimed in claim 3, wherein: a water glycol heat exchange medium flows through the first circulation net.
6. A marine liquid ammonia fuel supply system as claimed in claim 4, wherein: the second valve and the third valve are connected with the first valve in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020412377.9U CN211924353U (en) | 2020-03-27 | 2020-03-27 | Marine liquid ammonia fuel feed system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020412377.9U CN211924353U (en) | 2020-03-27 | 2020-03-27 | Marine liquid ammonia fuel feed system |
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| CN211924353U true CN211924353U (en) | 2020-11-13 |
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| CN202020412377.9U Active CN211924353U (en) | 2020-03-27 | 2020-03-27 | Marine liquid ammonia fuel feed system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901339A (en) * | 2021-01-15 | 2021-06-04 | 河北工业大学 | Direct injection natural gas engine system based on ammonia pyrolysis device and control method thereof |
| CN113446134A (en) * | 2021-06-16 | 2021-09-28 | 哈尔滨工程大学 | Gaseous ammonia fuel supply system with stable injection pressure |
| CN113530720A (en) * | 2021-07-16 | 2021-10-22 | 广东海洋大学 | Ammonia-powered container ship fuel cold energy utilization system |
| WO2022143287A1 (en) * | 2020-12-28 | 2022-07-07 | 大连船舶重工集团有限公司 | Marine liquid ammonia fuel supply and fuel recycling system |
| CN114933004A (en) * | 2022-06-20 | 2022-08-23 | 青岛双瑞海洋环境工程股份有限公司 | Ship ammonia vapor liquefaction recovery system and ammonia fuel power ship |
| CN114992017A (en) * | 2022-06-20 | 2022-09-02 | 青岛双瑞海洋环境工程股份有限公司 | Heat exchange pressurization device, system and method for marine ammonia fuel supply system |
| CN115342012A (en) * | 2022-07-18 | 2022-11-15 | 招商局重工(深圳)有限公司 | Ammonia fuel supply system for ocean engineering equipment and ship and control method |
| WO2023151121A1 (en) * | 2022-02-14 | 2023-08-17 | 彭力上 | Thermal decomposition and high-pressure direct injection type ammonia-fuelled engine |
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2020
- 2020-03-27 CN CN202020412377.9U patent/CN211924353U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022143287A1 (en) * | 2020-12-28 | 2022-07-07 | 大连船舶重工集团有限公司 | Marine liquid ammonia fuel supply and fuel recycling system |
| JP7463616B2 (en) | 2020-12-28 | 2024-04-08 | 大▲連▼船舶重工集▲団▼有限公司 | Marine liquid ammonia fuel supply and fuel recycling system |
| CN112901339A (en) * | 2021-01-15 | 2021-06-04 | 河北工业大学 | Direct injection natural gas engine system based on ammonia pyrolysis device and control method thereof |
| CN112901339B (en) * | 2021-01-15 | 2022-04-26 | 河北工业大学 | Direct injection natural gas engine system based on ammonia pyrolysis device and control method thereof |
| CN113446134A (en) * | 2021-06-16 | 2021-09-28 | 哈尔滨工程大学 | Gaseous ammonia fuel supply system with stable injection pressure |
| CN113530720A (en) * | 2021-07-16 | 2021-10-22 | 广东海洋大学 | Ammonia-powered container ship fuel cold energy utilization system |
| WO2023151121A1 (en) * | 2022-02-14 | 2023-08-17 | 彭力上 | Thermal decomposition and high-pressure direct injection type ammonia-fuelled engine |
| CN114933004A (en) * | 2022-06-20 | 2022-08-23 | 青岛双瑞海洋环境工程股份有限公司 | Ship ammonia vapor liquefaction recovery system and ammonia fuel power ship |
| CN114992017A (en) * | 2022-06-20 | 2022-09-02 | 青岛双瑞海洋环境工程股份有限公司 | Heat exchange pressurization device, system and method for marine ammonia fuel supply system |
| CN114992017B (en) * | 2022-06-20 | 2023-11-24 | 青岛双瑞海洋环境工程股份有限公司 | Heat exchange supercharging device, system and method of marine ammonia fuel supply system |
| CN115342012A (en) * | 2022-07-18 | 2022-11-15 | 招商局重工(深圳)有限公司 | Ammonia fuel supply system for ocean engineering equipment and ship and control method |
| CN115342012B (en) * | 2022-07-18 | 2023-09-12 | 招商局重工(深圳)有限公司 | Ammonia fuel supply system for ocean engineering equipment and ship and control method |
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