CN113719385A - Marine pipeline liquid ammonia recovery system - Google Patents
Marine pipeline liquid ammonia recovery system Download PDFInfo
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- CN113719385A CN113719385A CN202111053249.5A CN202111053249A CN113719385A CN 113719385 A CN113719385 A CN 113719385A CN 202111053249 A CN202111053249 A CN 202111053249A CN 113719385 A CN113719385 A CN 113719385A
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- Prior art keywords
- liquid ammonia
- pipeline
- valve
- communicated
- ammonia
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
- F02M33/02—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel
- F02M33/08—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel returning to the fuel tank
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
Abstract
The invention discloses a marine pipeline liquid ammonia recovery system, which relates to a marine liquid ammonia supply system.A nitrogen inlet is respectively arranged at one side close to an ammonia fuel engine and one side of a liquid ammonia buffer tank on a liquid ammonia supply pipeline, an ammonia recovery outlet is arranged at the lower point of a pipeline between the two nitrogen inlets, when the liquid ammonia of the liquid ammonia supply pipeline needs to be discharged, a nitrogen purge interface valve is opened, nitrogen enters from a nitrogen input pipeline, the pressure of ammonia in the pipeline discharged from the liquid ammonia recovery pipeline is given from the two ends of the pipeline, the liquid ammonia is discharged to the liquid ammonia recovery tank, and the residual gas is discharged through a ventilating mast. The system of the invention ensures that the ammonia recovery operation has no risk of ammonia leakage, and avoids the harm to the health of the crew and the possible explosion risk caused by ammonia leakage.
Description
Technical Field
The invention relates to a marine liquid ammonia supply system, in particular to a marine pipeline liquid ammonia recovery system.
Background
In the existing design scheme of the marine liquid ammonia supply system, after the system stops running or when system equipment and pipelines need to be maintained, the residual liquid ammonia in the pipelines generally needs to be emptied and recycled, so that the pipelines are prevented from being corroded. The following two methods are generally used for recovery: one is direct discharge into open collection devices such as buckets and drip trays; one is the release of ammonia by evaporation through a gas permeable line. The relatively closed environment of the ship cabin has limited ventilation effect, and the ammonia is toxic, inflammable and explosive. Therefore, the first method inevitably generates potential safety hazards and affects safe operation. In the second mode, because ammonia is stored in a liquid state in a system pipeline, on one hand, the time required for evaporation through gas purging is relatively long, and on the other hand, the evaporation and release of liquid ammonia in the pipeline inevitably causes fuel waste, and the economical efficiency of system operation is reduced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a marine pipeline liquid ammonia recovery system, so as to solve the problems mentioned in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a marine pipeline liquid ammonia recovery system comprises a liquid ammonia storage cabin communicated with a filling pipeline, wherein a liquid ammonia low-pressure pump is arranged at the inner bottom of the liquid ammonia storage cabin and communicated with a liquid ammonia buffer tank through a first pipeline, the liquid ammonia buffer tank is communicated with a liquid ammonia high-pressure pump through a second pipeline, the liquid ammonia high-pressure pump is communicated with a liquid ammonia heater through a third pipeline, the liquid ammonia heater is communicated with a liquid ammonia filter through a fourth pipeline, the liquid ammonia filter is communicated with a liquid ammonia main valve through a fifth pipeline, the liquid ammonia main valve is communicated with a first liquid ammonia valve group through a sixth pipeline, and the first liquid ammonia valve group is communicated with a liquid ammonia input end of an ammonia fuel engine through a liquid ammonia input pipeline; a liquid ammonia output end of the ammonia fuel engine is communicated to a second liquid ammonia valve bank through a liquid ammonia output pipeline, and the second liquid ammonia valve bank is communicated to a seventh pipeline;
the liquid ammonia buffer tank is communicated with the liquid ammonia collecting tank through an eighth pipeline and a ninth pipeline respectively; the eighth pipeline is provided with a first valve; a second valve and a third valve which are connected in series are arranged on the ninth pipeline;
a seventh line is connected to a ninth line region between the second valve and the third valve;
the nitrogen purging interface provided with a valve is respectively communicated to the filling pipeline, the liquid ammonia input pipeline and the liquid ammonia output pipeline through a plurality of nitrogen input pipelines;
the filling pipeline, the fourth pipeline, the liquid ammonia input pipeline and the seventh pipeline are respectively communicated to one end of a U-shaped pipe through a liquid ammonia recovery pipeline, the other end of the U-shaped pipe is communicated to a liquid ammonia recovery tank through a relief valve, and the liquid ammonia recovery tank is communicated to a ninth pipeline area between the second valve and the third valve through a liquid ammonia return pipe connected with a liquid ammonia return pump in series; a liquid level switch for controlling the discharge valve is arranged on the U-shaped pipe;
the liquid ammonia collecting tank is also communicated to the input end of the gas-liquid separation device through a tenth pipeline provided with a valve; the liquid ammonia output pipeline is also communicated to the input end of the gas-liquid separation device through an eleventh pipeline provided with a fourth valve;
the gas output end of the gas-liquid separation device is communicated with the ventilating mast.
The connection point of the nitrogen input pipeline and the liquid ammonia output pipeline is arranged closer to the ammonia fuel engine than the position of the fourth valve.
The connecting point of the nitrogen input pipeline and the liquid ammonia input pipeline is closer to the ammonia fuel engine than the connecting point of the liquid ammonia recovery pipeline and the liquid ammonia input pipeline.
The connecting point of the nitrogen input pipeline and the filling pipeline is farther away from the liquid ammonia storage cabin than the connecting point of the liquid ammonia recovery pipeline and the filling pipeline.
The first liquid ammonia valve group comprises at least two valves connected in series.
The second liquid ammonia valve set comprises at least two valves connected in series.
The nitrogen input pipeline is also communicated with the second pipeline and the seventh pipeline.
Compared with the prior art, the invention has the advantages that:
1. the ammonia recovery operation has no risk of ammonia leakage, and avoids the harm to the health of the crew and the possible explosion risk caused by ammonia leakage. The gain effect of the scheme is particularly obvious for the closed environment of the ship cabin.
2. The liquid ammonia fuel in the pipeline can be reused, the waste of the ammonia fuel is reduced, and the operating cost of the system is reduced.
3. Liquid ammonia is released and is carried out simultaneously with nitrogen purging, thereby shortening the purging time of the system pipeline and facilitating the use.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the marine pipeline liquid ammonia recovery system of the present invention includes a liquid ammonia storage tank communicated with a filling pipeline, a liquid ammonia low-pressure pump is disposed at an inner bottom of the liquid ammonia storage tank, the liquid ammonia low-pressure pump is communicated with a liquid ammonia buffer tank through a first pipeline, the liquid ammonia buffer tank is communicated with a liquid ammonia high-pressure pump through a second pipeline, the liquid ammonia high-pressure pump is communicated with a liquid ammonia heater through a third pipeline, the liquid ammonia heater is communicated with a liquid ammonia filter through a fourth pipeline, the liquid ammonia filter is communicated with a liquid ammonia main valve through a fifth pipeline, the liquid ammonia main valve is communicated with a first liquid ammonia valve bank through a sixth pipeline, and the first liquid ammonia valve bank is communicated with a liquid ammonia input end of an ammonia fuel engine through a liquid ammonia input pipeline; a liquid ammonia output end of the ammonia fuel engine is communicated to a second liquid ammonia valve bank through a liquid ammonia output pipeline, and the second liquid ammonia valve bank is communicated to a seventh pipeline;
the liquid ammonia buffer tank is communicated with the liquid ammonia collecting tank through an eighth pipeline and a ninth pipeline respectively; the eighth pipeline is provided with a first valve; a second valve and a third valve which are connected in series are arranged on the ninth pipeline;
a seventh line is connected to a ninth line region between the second valve and the third valve;
the nitrogen purging interface provided with a valve is respectively communicated to the filling pipeline, the liquid ammonia input pipeline and the liquid ammonia output pipeline through a plurality of nitrogen input pipelines;
the filling pipeline, the fourth pipeline, the liquid ammonia input pipeline and the seventh pipeline are respectively communicated to one end of a U-shaped pipe through a liquid ammonia recovery pipeline, the other end of the U-shaped pipe is communicated to a liquid ammonia recovery tank through a relief valve, and the liquid ammonia recovery tank is communicated to a ninth pipeline area between the second valve and the third valve through a liquid ammonia return pipe connected with a liquid ammonia return pump in series; a liquid level switch for controlling the discharge valve is arranged on the U-shaped pipe;
the liquid ammonia collecting tank is also communicated to the input end of the gas-liquid separation device through a tenth pipeline provided with a valve; the liquid ammonia output pipeline is also communicated to the input end of the gas-liquid separation device through an eleventh pipeline provided with a fourth valve;
the gas output end of the gas-liquid separation device is communicated with the ventilating mast.
The connection point of the nitrogen input pipeline and the liquid ammonia output pipeline is arranged closer to the ammonia fuel engine than the position of the fourth valve.
The connecting point of the nitrogen input pipeline and the liquid ammonia input pipeline is closer to the ammonia fuel engine than the connecting point of the liquid ammonia recovery pipeline and the liquid ammonia input pipeline.
The connecting point of the nitrogen input pipeline and the filling pipeline is farther away from the liquid ammonia storage cabin than the connecting point of the liquid ammonia recovery pipeline and the filling pipeline.
The first liquid ammonia valve group comprises at least two valves connected in series.
The second liquid ammonia valve set comprises at least two valves connected in series.
The nitrogen input pipeline is also communicated with the second pipeline and the seventh pipeline.
The dotted lines in the figure are a nitrogen gas input line and a liquid ammonia recovery line.
In view of the overall design layout of the present invention, the nitrogen gas inlet is provided on the liquid ammonia supply line on the side close to the ammonia fuel engine and on the side of the liquid ammonia buffer tank, respectively, and the ammonia recovery outlet is provided at a lower point of the line between the two nitrogen gas inlets, but in the case of a specific design, the nitrogen gas inlets may be connected to the second line and the seventh line in the manner described above.
When liquid ammonia of liquid ammonia supply pipeline need to be released, the valve at the nitrogen purging interface is opened, nitrogen enters from the nitrogen input pipeline, the pressure (and the pressure can avoid the vaporization of the liquid ammonia in the pipeline as far as possible) discharged from the liquid ammonia recovery pipeline is given to ammonia in the pipeline from two ends of the pipeline, and the liquid ammonia is discharged to the liquid ammonia recovery tank.
The inlet of the discharge pipeline of the liquid ammonia recovery tank is provided with a U-shaped pipe and is provided with a liquid level switch control discharge valve. Above-mentioned in-process, when liquid level switch detected U type socle portion and had not had liquid, explain that liquid ammonia retrieves basically and finishes, liquid level switch control bleeder valve closes, avoids nitrogen gas to get into liquid ammonia recovery tank. At the moment, the nitrogen continues to be purged, and residual ammonia gas and a small amount of liquid ammonia in the pipeline can be released through the ventilating mast. The nitrogen purge was stopped after the release was complete. Although a small amount of liquid ammonia remains in the gas-liquid separation device, it is gradually vaporized and discharged due to an increase in temperature.
The valve that sets up on the liquid ammonia recovery pipeline after the bleeder valve is closed is opened, and liquid ammonia recovery pump starts, returns liquid ammonia buffer tank or liquid ammonia collecting tank with the pump in the liquid ammonia recovery tank, supplies the follow-up further use of system.
The U-shaped pipe and the liquid level switch are arranged to prevent excessive nitrogen from entering the liquid ammonia recovery tank to pollute ammonia fuel as far as possible. Other detection devices such as a nitrogen sensor, a temperature sensor and the like or other equipment can be adopted to prevent the excessive nitrogen from entering the liquid ammonia recovery tank.
When the system does not set up liquid ammonia collection tank or liquid ammonia buffer tank, liquid ammonia recovery tube can be directly connected with the liquid ammonia high-pressure pump and supply liquid ammonia fuel engine to use. And can also be returned to the liquid ammonia storage for storage.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (7)
1. A marine pipeline liquid ammonia recovery system is characterized by comprising a liquid ammonia storage cabin communicated with a filling pipeline, wherein a liquid ammonia low-pressure pump is arranged at the inner bottom of the liquid ammonia storage cabin and communicated with a liquid ammonia buffer tank through a first pipeline, the liquid ammonia buffer tank is communicated with a liquid ammonia high-pressure pump through a second pipeline, the liquid ammonia high-pressure pump is communicated with a liquid ammonia heater through a third pipeline, the liquid ammonia heater is communicated with a liquid ammonia filter through a fourth pipeline, the liquid ammonia filter is communicated with a liquid ammonia main valve through a fifth pipeline, the liquid ammonia main valve is communicated with a first liquid ammonia valve bank through a sixth pipeline, and the first liquid ammonia valve bank is communicated with a liquid ammonia input end of an ammonia fuel engine through a liquid ammonia input pipeline; a liquid ammonia output end of the ammonia fuel engine is communicated to a second liquid ammonia valve bank through a liquid ammonia output pipeline, and the second liquid ammonia valve bank is communicated to a seventh pipeline;
the liquid ammonia buffer tank is communicated with the liquid ammonia collecting tank through an eighth pipeline and a ninth pipeline respectively; a first valve is arranged on the eighth pipeline; the ninth pipeline is provided with a second valve and a third valve which are connected in series;
the seventh line is connected to a ninth line region between the second valve and the third valve;
a nitrogen purging interface provided with a valve is respectively communicated to the filling pipeline, the liquid ammonia input pipeline and the liquid ammonia output pipeline through a plurality of nitrogen input pipelines;
the filling pipeline, the fourth pipeline, the liquid ammonia input pipeline and the seventh pipeline are also respectively communicated to one end of a U-shaped pipe through a liquid ammonia recovery pipeline, the other end of the U-shaped pipe is communicated to a liquid ammonia recovery tank through a relief valve, and the liquid ammonia recovery tank is communicated to a ninth pipeline area between the second valve and the third valve through a liquid ammonia return pipe connected with a liquid ammonia return pump in series; a liquid level switch for controlling the discharge valve is arranged on the U-shaped pipe;
the liquid ammonia collecting tank is also communicated to the input end of the gas-liquid separation device through a tenth pipeline provided with a valve; the liquid ammonia output pipeline is communicated to the input end of the gas-liquid separation device through an eleventh pipeline provided with a fourth valve;
and the gas output end of the gas-liquid separation device is communicated to the ventilating mast.
2. The marine pipeline liquid ammonia recovery system of claim 1, wherein the connection point of the nitrogen input line to the liquid ammonia output line is located closer to the ammonia fuel engine than the fourth valve.
3. The marine pipeline liquid ammonia recovery system of claim 1, wherein the connection point of the nitrogen input line to the liquid ammonia input line is closer to the ammonia fuel engine than the connection point of the liquid ammonia recovery line to the liquid ammonia input line.
4. The marine pipeline liquid ammonia recovery system of claim 1, wherein the connection point of the nitrogen input pipeline and the filling pipeline is farther from the liquid ammonia storage tank than the connection point of the liquid ammonia recovery pipeline and the filling pipeline.
5. The marine pipeline liquid ammonia recovery system of claim 1, wherein the first set of liquid ammonia valves comprises at least two valves in series.
6. The marine pipeline liquid ammonia recovery system of claim 1, wherein the second liquid ammonia valve bank comprises at least two valves in series.
7. The marine pipeline liquid ammonia recovery system of claim 1, wherein the nitrogen input line is further in communication with the second line and the seventh line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053249.5A CN113719385A (en) | 2021-09-09 | 2021-09-09 | Marine pipeline liquid ammonia recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111053249.5A CN113719385A (en) | 2021-09-09 | 2021-09-09 | Marine pipeline liquid ammonia recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN113719385A true CN113719385A (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111053249.5A Pending CN113719385A (en) | 2021-09-09 | 2021-09-09 | Marine pipeline liquid ammonia recovery system |
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| CN (1) | CN113719385A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368449A (en) * | 2022-02-28 | 2022-04-19 | 广船国际有限公司 | Chemical ship with ammonia fuel tank |
| 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 |
| WO2023120031A1 (en) * | 2021-12-21 | 2023-06-29 | 三菱造船株式会社 | Floating body and method for discharging inert gas from floating body |
| WO2023162325A1 (en) * | 2022-02-25 | 2023-08-31 | 三菱重工業株式会社 | Floating body |
| WO2023162350A1 (en) * | 2022-02-25 | 2023-08-31 | 三菱重工業株式会社 | Method for treating gas of floating body, and floating body |
-
2021
- 2021-09-09 CN CN202111053249.5A patent/CN113719385A/en active Pending
Cited By (6)
| 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 |
| EP4269779A1 (en) * | 2020-12-28 | 2023-11-01 | Dalian Shipbuilding Industry Co. Ltd | Marine liquid ammonia fuel supply and fuel recycling system |
| WO2023120031A1 (en) * | 2021-12-21 | 2023-06-29 | 三菱造船株式会社 | Floating body and method for discharging inert gas from floating body |
| WO2023162325A1 (en) * | 2022-02-25 | 2023-08-31 | 三菱重工業株式会社 | Floating body |
| WO2023162350A1 (en) * | 2022-02-25 | 2023-08-31 | 三菱重工業株式会社 | Method for treating gas of floating body, and floating body |
| CN114368449A (en) * | 2022-02-28 | 2022-04-19 | 广船国际有限公司 | Chemical ship with ammonia fuel tank |
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