CN105197898A - Nitrogen making system for ship - Google Patents
Nitrogen making system for ship Download PDFInfo
- Publication number
- CN105197898A CN105197898A CN201510664217.7A CN201510664217A CN105197898A CN 105197898 A CN105197898 A CN 105197898A CN 201510664217 A CN201510664217 A CN 201510664217A CN 105197898 A CN105197898 A CN 105197898A
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- China
- Prior art keywords
- nitrogen
- processed
- preparation system
- pressure
- buffer tank
- Prior art date
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 391
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 192
- 238000001179 sorption measurement Methods 0.000 claims description 53
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 44
- 238000002360 preparation method Methods 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 19
- 239000002808 molecular sieve Substances 0.000 claims description 15
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 8
- 230000004907 flux Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 3
- 230000003139 buffering effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 230000008929 regeneration Effects 0.000 description 10
- 238000011069 regeneration method Methods 0.000 description 10
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
- 238000001035 drying Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000011261 inert gas Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052756 noble gas Inorganic materials 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention relates to a nitrogen making system for a ship. The nitrogen making system comprises a compressor, a nitrogen making machine and/or a nitrogen buffer tank as well as a flow pressure regulating device which are sequentially connected through pipelines, wherein the compressor comprises at least one compression unit and is used for providing compressed air; the nitrogen making machine comprises at least two nitrogen making units and is used for making nitrogen; the nitrogen buffer tank is used for storing and buffering the nitrogen; the flow pressure regulating device is used for regulating flow and pressure. Compared with a conventional nitrogen making system, the nitrogen making system is not equipped with an air dryer, an air buffer tank or a nitrogen buffer tank and can output the small-flow and high-pressure nitrogen, and the pressure of the nitrogen is higher than the highest output pressure of an air compressor. With the adoption of the means, the structure of the nitrogen making system in the prior art is simplified, device operation and nitrogen yield cannot be influenced, and device investment and energy are saved.
Description
Technical field
The present invention relates to nitrogen preparation technical field, particularly relate to a kind of nitrogen preparation system peculiar to vessel.
Background technology
Existing the safety of Life at Sea's (SOLAS pact) regulation come into force that International Maritime Organizaton (IMO) passes through; 20 are greater than for tons deadweight; 000 ton and above carrying flash-point are no more than 60 DEG C; and its Reid vapor pressure is lower than the crude oil of barometric point and processed oil or the tank vessel of other liquid goods kinds of goods with similar fire hazard, the protection of cargo tank should meet by one the fixing inert gas system that " fire-fighting safety system rule " require and reach.
Inert gas generator is the core component of inert gas system, according to the difference of rare gas element occurring principle, combustion-type, hollow-fibre membrane sky can be divided into divide and pressure change adsorption type sky point three types.Wherein hollow-fibre membrane sky point is also called nitrogen generator unit processed (abbreviation Nitrogen plant) with pressure change adsorption type sky point.
Combustion-type inert gas generating device owing to occurring the earliest and cheap, so install in a large number on super tanker and early stage chemical tanker.Even if but due to the noble gas that produces after fuel combustion sulphur, oxynitrides (NOX) content after seawater drip washing still very high, constantly add goods liquid tank along with liquid during loading, noble gas in harbour continuous blow-down, severe contamination harbour environment.The ship that noble gas was housed originally can not obtain GREENPASS, and the boats and ships that noble gas is housed now no longer allow in emission control district navigation (ECA---emitcontrolarea).
And the clean contamination-free of the nitrogen that Nitrogen plant is produced, be the rare gas element that can use in emission control district.But the occupation of land of Nitrogen plant is larger than noble gas equipment, and purchase cost is high.So for reequiping or installing the chemical tanker of nitrogen gas preparing additional or adopt the ship type of the old design of the equipment of making nitrogen all to propose harsh requirement to the space of installing Nitrogen plant.In addition, reducing the cost of nitrogen is also be conducive to shipowner to use Nitrogen plant as early as possible instead and obtain discharge region airworthiness certificate.
Usually, the nitrogen preparation device of pressure-variable adsorption mode (PressureSwingAdsorption, PSA mode) (nitrogen PSA device) is utilized as easy nitrogen gas supply unit for multiple use.In recent years, as boats and ships (ocean platform) user requirement, this nitrogen preparation device expects provided more nitrogen generating capacity on the basis of existing space.For oil product, chemical tanker, the increase of nitrogen supply (NS) amount contributes to the port discharge speed improving oil product, chemical tanker, thus reduces the stagnant ETA estimated time of arrival of ship, improves single ship utilising efficiency, improves the economic benefit of oiling ship.
Therefore, a kind of structure of prior art urgent need exploitation is simplified, and invests low nitrogen preparation system peculiar to vessel.
Summary of the invention
Based on this, the object of this invention is to provide a kind of structure and simplify, invest low nitrogen preparation system peculiar to vessel.
Concrete technical scheme is as follows:
A kind of nitrogen preparation system peculiar to vessel, is connected in sequence by pipeline by following equipment:
Compressor, comprises at least one compressed element, for providing pressurized air;
Filtration unit, comprises at least one filtering unit, for filtering compressed air;
Nitrogen plant, comprises at least two nitrogen unit processed, for the preparation of nitrogen;
And/or nitrogen buffer tank, for storing, cushioning nitrogen;
And flow pressure setting device, for adjust flux and pressure.
Wherein in an embodiment, the working order of described nitrogen unit processed comprises nitrogen state processed and equal pressure condition, when nitrogen preparation system works peculiar to vessel, have at most a nitrogen unit processed to be in equal pressure condition in described Nitrogen plant, all the other nitrogen unit processed are all in nitrogen state processed.
Wherein in an embodiment, every 1Nm
3the volume of the nitrogen buffer tank needed for/min nitrogen output is less than or equal to 20L.
Wherein in an embodiment, described nitrogen unit processed comprises two adsorption towers, is provided with siccative packing layer and carbonaceous molecular sieve packing layer successively in described adsorption tower along gas flow direction.
Wherein in an embodiment, flow pressure setting device comprises flow purity pressure setting device and/or pipeline supercharging device.
Wherein in an embodiment, the mode of connection between each described nitrogen unit processed is for being connected in parallel.
Principle of the present invention and advantage as follows:
Compared with existing nitrogen preparation system (as shown in Figure 1), be not provided with cooling driers (or independent absorption type compressed air drying device) in nitrogen preparation system peculiar to vessel of the present invention, (the large-scale equipment of making nitrogen of part can be provided with nitrogen buffer tank for air cushioning tank and nitrogen buffer tank, but the volume of nitrogen buffer tank also comparatively prior art greatly reduce, prior art is every 1Nm usually
3/ min nitrogen output at least needs 0.3-0.6m
3nitrogen buffer tank, the every 1Nm of nitrogen preparation system of the present invention
3/ min nitrogen output maximum needs 20L nitrogen buffer tank).
The present invention is provided with siccative packing layer along gas flow direction increase in the adsorption tower of nitrogen unit processed, can substitute the function of cooling driers in prior art (or dryer).And the present invention adopts pressure swing absorption process to carry out drying and dehydrating to gas, its principle is the difference utilizing siccative adsorption moisture at various pressures, moisture in adsorbed gas under elevated pressure, is taken out of by the gas of the moisture of absorption by drying when reducing pressure.
If carry out pressurized air processed after adopting separately Adsorbing drying by pressure variation to be installed on compressor in prior art, the tolerance of consume process tolerance 14-20% is needed to rinse the moisture taken away and desorb.Not only a whole set of equipment of making nitrogen cannot reduce erection space, and the free air delivery that also will increase compressor increases investment and energy consumption.
The present invention utilizes dexterously and releases enriched-oxygen waste gas during each desorb of Nitrogen plant (gas volume of releasing when producing 95% nitrogen accounts for 50% of input compressed-air total amount; especially up to more than 70% during 99.9% purity); drying and nitrogen processed are united two into one; the carbonaceous molecular sieve that both can solve pressurized air dewatered clean protection nitrogen processed does not make moist, and can obtain again the satisfactory drying nitrogen of dewpoint requirements.More the benefit done so increases facility investment, takes full advantage of the desorb discharging waste gas of Nitrogen plant, save fuel and water coolant, and reach the object saving nitrogen gas generating device installing space.
In prior art, nitrogen unit processed comprises two adsorption towers, be respectively adsorption tower A and adsorption tower B (being made up of the jar filling carbonaceous molecular sieve), an adsorption tower A passes into pressurized air, obtain nitrogen by the oxygen in the carbonaceous molecular sieve adsorption compression air in adsorption tower, be called " nitrogen processed ".Meanwhile, with the nitrogen that part is produced, the carbonaceous molecular sieve in another one adsorption tower B is rinsed in addition, the oxygen of carbonaceous molecular sieve internal adsorption is discharged, is called " regeneration ".When carbonaceous molecular sieve adsorption of oxygen in the adsorption tower A of " nitrogen processed " is saturated, " nitrogen processed " and " regeneration " suspend simultaneously, by one, A, B adsorption tower that " regeneration " and " nitrogen processed " completes is called that the nitrogen in A adsorption tanks is transferred in B adsorption tower by the process of " all pressing ", the pressure of A, B adsorption tower is close to equal.After " all press ", B adsorption tower passes into pressurized air " nitrogen processed ", A adsorption tower nitrogen wash and emptying " regeneration ".In " nitrogen processed " that replaces at A, B adsorption tower and " regeneration " process, nitrogen process processed is continued.When this alternation procedure is due to " all pressing ", " nitrogen processed " is in pause stage.Both non-compressed air entered adsorption tower and was consumed, and also confessed from adsorption tower without nitrogen.The switching of A, B adsorption tower is quite frequent, will switch once in general 1min.
In order to maintain the continuity of nitrogen supply (NS), after nitrogen unit processed of the prior art, all can adopt a nitrogen buffer tank stored nitrogen, maintaining the without interruption of nitrogen when nitrogen unit processed is in equal pressure condition.Equally, pressurized air surge tank is also to ensure that when nitrogen unit processed is in equal pressure condition compressor frequently can not add unloading because pressurized air consumes all standing.The unloading frequency that adds of compressor has a definite limitation.That spends the short period of time adds unloading, not only cannot save energy consumption and also can damage and add unloading valve and switch causes compressor fault.
The present invention is in order to solve the problem, at least two nitrogen unit processed are set in Nitrogen plant, by being staggered all pressures time organizing nitrogen unit processed, avoiding ownership system nitrogen unit all to press at one time more, namely can ensure that whole system maintains normal nitrogen supply (NS) and pressurized air consumption.If such as there is N group nitrogen unit to work simultaneously, so in this N group nitrogen unit, the exchange of A, B tower is carried out according to staggering time T.Assuming that " nitrogen processed " time is T
n2, " all pressing " alternately the required time is T
eQ, T=(T
n2+ T
eQ)/N.This T is exactly best interval time, and ensure to only have at most one group of PSA to be in equal pressure condition, all the other nitrogen unit processed are all in nitrogen state processed.
For chemical tanker pigging operation, the nitrogen total amount that the inerting that gascarrier loading and unloading pipeline or LNG power-driven vessel charge filling pipeline needs is little, and nitrogen is very short for duration of service, but requires nitrogen pressure, purity, and supply flow is higher instantaneously.For this job requirements, usual scheme is by improving compressor operating pressure and then improving the output pressure that PSA nitrogen pressure improves nitrogen.Not only but way obviously can strengthen the specification of compressor like this, add investment and use cost but also increase equipment occupation of land.By installing gas drive move pressure charging valve on pipeline or pump just can addressing this problem when not increasing compressor specification and occupation of land.
The present invention takes above-mentioned means, the nitrogen preparation system of prior art is carried out structure simplify, the occupation of land (can arrange the space that the original Inert gas system of oil-feed ship takies completely) reducing equipment can ensure again output, pressure, the purity of equipment operation and nitrogen, has saved facility investment and energy consumption simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing nitrogen preparation system;
Fig. 2 is the structural representation of the nitrogen preparation system of one embodiment of the invention;
Fig. 3 is the structural representation of the nitrogen preparation system of another embodiment of the present invention.
Description of reference numerals:
10, compressor; 101, compressed element; 20, Nitrogen plant; 201, nitrogen unit processed; 30, flow pressure setting device; 301, flow purity pressure setting device; 302, pipeline supercharging device; 40, nitrogen buffer tank; 50, cooling driers; 60, air cushioning tank; 70, filtration unit.
Embodiment
By the following examples the application is further elaborated.
With reference to figure 2,3, a kind of nitrogen preparation system peculiar to vessel, is connected in sequence by pipeline by following equipment:
Compressor 10, comprises at least one compressed element 101, for providing pressurized air; More than 2 compressed elements are provided with according in surveying society's rule usually compressor.
Filtration unit 70, comprises at least one filtering unit, and described filtering unit is stage compression air filter, for filtering compressed air.
Nitrogen plant 20, comprises at least two nitrogen unit 201 processed, for the preparation of nitrogen; Mode of connection between each described nitrogen unit processed is for being connected in parallel.The working order of each described nitrogen unit processed comprises nitrogen state processed and equal pressure condition, and when nitrogen preparation system works peculiar to vessel, only have a nitrogen unit processed to be in equal pressure condition in described Nitrogen plant, all the other nitrogen unit processed are all in nitrogen state processed.
Each described nitrogen unit processed includes two adsorption towers, loads siccative packing layer and carbonaceous molecular sieve packing layer (not shown) respectively in described adsorption tower along gas flow direction.
Nitrogen buffer tank 40, for storing, cushioning nitrogen; The every 1Nm of the present embodiment
3the volume of the surge tank needed for/min nitrogen output is 20L.Understandably, small-sized nitrogen gas generating system adopts large diameter pipeline can replace nitrogen pot function, does not namely need to arrange nitrogen pot, and for large-scale nitrogen preparation system, (nitrogen output is more than 10Nm
3/ min), need to arrange nitrogen buffer tank, nitrogen pot volume is maximum according to 20L × nitrogen output Nm
3/ min.
And flow pressure setting device 30, for adjust flux and pressure; Flow pressure setting device comprises flow purity pressure setting device 301, when needs high pressure nitrogen, can also set up pipeline supercharging device 302 in bypass, for providing the nitrogen of high pressure.Supercharging device adopts gas drive topping-up pump, and power resources are nitrogen, and such topping-up pump is directly installed on pipeline, without tie cable and water coolant (the supercharging band of gas that supercharging heat is discharged is walked), and the place not outside occupying volume.
The nitrogen preparation system peculiar to vessel of the present embodiment and existing nitrogen preparation system are (as shown in Figure 1, comprise the compressor 10, filtration unit 70, cooling driers 50, air cushioning tank 60, Nitrogen plant 20, nitrogen buffer tank 40 and the flow pressure setting device 30 that are connected successively by pipeline) compare, be not provided with cooling driers (compressed air drier) in nitrogen preparation system peculiar to vessel of the present invention, (the large-scale equipment of making nitrogen of part can be provided with surge tank for air cushioning tank and nitrogen buffer tank, but the volume of surge tank also comparatively prior art greatly reduce, usual 1Nm
3/ min nitrogen output needs 20L surge tank).
The present embodiment is provided with siccative packing layer along gas flow direction increase in the adsorption tower of nitrogen unit processed, can substitute the function of cooling driers in prior art.And the nitrogen preparation system of the present embodiment adopts pressure swing absorption process to carry out drying and dehydrating to gas, its principle is the difference utilizing siccative adsorption moisture at various pressures, moisture in adsorbed gas under elevated pressure, is taken out of the moisture of absorption by dry gas when reducing pressure.
If adopt separately this drying installation to carry out pressurized air processed in prior art after compressor, the tolerance of consume process tolerance 14-20% is needed to rinse the moisture taken away and desorb.Not only a whole set of equipment of making nitrogen cannot reduce erection space, and the free air delivery that also will increase compressor increases investment and energy consumption.
The embodiment of the present invention utilizes dexterously releases enriched-oxygen waste gas during each desorb of Nitrogen plant (gas volume of releasing when producing 95% nitrogen accounts for 50% of input compressed-air total amount; especially up to more than 70% during 99.9% purity); drying and nitrogen processed are united two into one; the carbonaceous molecular sieve that can solve pressurized air dewatered clean protection nitrogen processed does not make moist, and can obtain again the satisfactory drying nitrogen of dewpoint requirements.More the benefit done so increases facility investment, takes full advantage of the desorb discharging waste gas of Nitrogen plant, save fuel and water coolant, and reach the object saving nitrogen gas generating device installing space.
In prior art, nitrogen unit processed comprises two adsorption towers, be respectively adsorption tower A and adsorption tower B (being made up of the jar filling carbonaceous molecular sieve), an adsorption tower A passes into pressurized air, obtain nitrogen by the oxygen in the carbonaceous molecular sieve adsorption compression air in adsorption tower, be called " nitrogen processed ".Meanwhile, with the nitrogen that part is produced, the carbonaceous molecular sieve in another one adsorption tower B is rinsed in addition, the oxygen of carbonaceous molecular sieve internal adsorption is discharged, is called " regeneration ".When carbonaceous molecular sieve adsorption of oxygen in the adsorption tower A of " nitrogen processed " is saturated, " nitrogen processed " and " regeneration " suspend simultaneously, by one, A, B adsorption tower that " regeneration " and " nitrogen processed " completes is called that the nitrogen in A adsorption tanks is transferred in B adsorption tower by the process of " all pressing ", the pressure of A, B adsorption tower is close to equal.After " all press ", B adsorption tower passes into pressurized air " nitrogen processed ", A adsorption tower nitrogen wash and emptying " regeneration ".In " nitrogen processed " that replaces at A, B adsorption tower and " regeneration " process, nitrogen process processed is continued.When this alternation procedure is due to " all pressing ", " nitrogen processed " is in pause stage.Both non-compressed air entered adsorption tower and was consumed, and also confessed from adsorption tower without nitrogen.The switching of A, B adsorption tower is quite frequent, will switch once in general 1min.
In order to maintain the continuity of nitrogen supply (NS), after nitrogen unit processed of the prior art, all with a nitrogen buffer tank stored nitrogen, the without interruption of nitrogen can be maintained when nitrogen unit processed is in equal pressure condition.Equally, pressurized air surge tank is also to ensure that when nitrogen unit processed is in equal pressure condition compressor frequently can not add unloading because pressurized air consumes all standing.The unloading frequency that adds of compressor has a definite limitation.That spends the short period of time adds unloading, not only cannot save energy consumption and also can damage and add unloading valve and switch causes compressor fault.
The present embodiment is in order to solve the problem, at least two nitrogen unit processed are set in Nitrogen plant, by being staggered all pressures time organizing nitrogen unit processed, avoiding ownership system nitrogen unit all to press at one time more, namely can ensure that whole system maintains normal nitrogen supply (NS) and pressurized air consumption.If such as there is N group nitrogen unit to work simultaneously, so in this N group nitrogen unit, the exchange of A, B tower is carried out according to staggering time T.Assuming that " nitrogen processed " time is T
n2, " all pressing " alternately the required time is T
eQ, T=(T
n2+ T
eQ)/N.This T is exactly best interval time, and ensure to only have at most one group of PSA to be in equal pressure condition, all the other nitrogen unit processed are all in nitrogen state processed.
The embodiment of the present invention takes above-mentioned means, the nitrogen preparation system of prior art has been carried out structure and has simplified, and can ensure that again the output of equipment operation and nitrogen is unaffected, save facility investment and energy consumption.
The practical application of above-mentioned nitrogen preparation system peculiar to vessel:
Example 1:55,000 ton of oiling ship (55KCT) 4,250Nm
3/ h Nitrogen plant installs project additional, as shown in Figure 2
55,000 ton of oiling ship lease side needs the airworthiness certificate obtaining emission control district, North America.Original design middle Inert gas system is that traditional combustion-type does not allow to run at north America region.And can not run as the necessary Inert gas system of unloading, meaning chemical tanker does not allow at North America port discharge.So need to install nitrogen gas generating device additional.And do not consider the cabin that reserved Nitrogen plant is put during the design of oiling ship, the yet electric power that needs of reserved nitrogen gas generator and water coolant.Can arrange that two container type bavins drive air compressor by adding assembling platform at quarterdeck, assembling platform and deckhouse layout Nitrogen plant is added on deck, side, topside DECKHOUSE is only enough arranges lower Nitrogen plant, does not arrange nitrogen buffer tank, air cushioning tank and cooling driers.By adopting way described in this patent, successfully by 4250Nm
3/ h nitrogen preparation system is arranged on 55000 tons of oiling ships.
Example 2:85000 side ultra-large type ethane transport-ship (VLEC) nitrogen gas generating device, as shown in Figure 2
Nitrogen is configured with two cover nitrogen 1,500Nm
3the nitrogen system of/h purity more than 99.8%, the using and the reserved.Will under machinery room arrangement and to leave enough maintenance of the equipment space difficulty very big.Be arranged in the nitrogen gas generating device limit for height in cabin.So need reduction equipment to take up an area size and height, adopt the art of this patent to remove occupation of land that cooling driers and air cushioning tank, nitrogen buffer tank greatly reduce equipment.Adopt the combination of many groups nitrogen unit processed, the height of single group nitrogen unit processed can control in tolerance band, reduces the cost of investment of nitrogen preparation system on the whole simultaneously.
Example 3:12500 ton stainless steel chemical peculiar to vessel 1,500Nm
3/ h nitrogen system, as shown in Figure 3
Adopt the art of this patent scheme completely, whole system is configured to output flow 27m
3the screw-rod air compressor two of/min, operating pressure 8bar overlaps, a set of compressed-air filter, a set of X1500PSA Nitrogen plant (comprises two PSA unit, containing dry), a set of nitrogen supercharging gas drive pump, a set of nitrogen flow, pressure, purity setting device.
When discharging cargo work, during cargo discharge pump standard-sized sheet, 25Nm can be provided
3/ min, purity 95%, the nitrogen filling liquid cargo hold of pressure 0.25bar is because the space of causing of unloading increases.Unloading completes, and can provide purity 99.9%, peak flow 5Nm by nitrogen supercharging device
3the nitrogen of/min is used for pigging operation (to be promoted rotating wash bowl and ducted residual liquid is driven to shore tank.)
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification sheets is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. a nitrogen preparation system peculiar to vessel, is characterized in that, is connected in sequence by pipeline by following equipment:
Compressor, comprises at least one compressed element, for providing pressurized air;
Filtration unit, comprises at least one filtering unit, for filtering compressed air;
Nitrogen plant, comprises at least two nitrogen unit processed, for the preparation of nitrogen;
And/or nitrogen buffer tank, for storing, cushioning nitrogen;
And flow pressure setting device, for adjust flux and pressure.
2. nitrogen preparation system peculiar to vessel according to claim 1, it is characterized in that, the working order of described nitrogen unit processed comprises nitrogen state processed and equal pressure condition, when nitrogen preparation system works peculiar to vessel, have at most a nitrogen unit processed to be in equal pressure condition in described Nitrogen plant, all the other nitrogen unit processed are all in nitrogen state processed.
3. nitrogen preparation system peculiar to vessel according to claim 1, is characterized in that, every 1Nm
3the volume of the nitrogen buffer tank needed for/min nitrogen output is less than or equal to 20L.
4. the nitrogen preparation system peculiar to vessel according to any one of claim 1-3, is characterized in that, described nitrogen unit processed comprises two adsorption towers, is provided with siccative packing layer and carbonaceous molecular sieve packing layer successively in described adsorption tower along gas flow direction.
5. the nitrogen preparation system peculiar to vessel according to any one of claim 1-3, is characterized in that, flow pressure setting device comprises flow purity pressure setting device and/or pipeline supercharging device.
6. the nitrogen preparation system peculiar to vessel according to any one of claim 1-3, is characterized in that, the mode of connection between each described nitrogen unit processed is for being connected in parallel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510664217.7A CN105197898B (en) | 2015-10-14 | 2015-10-14 | Nitrogen making system for ship |
| PCT/CN2016/087591 WO2017063380A1 (en) | 2015-10-14 | 2016-06-29 | Nitrogen generating system for ships |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510664217.7A CN105197898B (en) | 2015-10-14 | 2015-10-14 | Nitrogen making system for ship |
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| Publication Number | Publication Date |
|---|---|
| CN105197898A true CN105197898A (en) | 2015-12-30 |
| CN105197898B CN105197898B (en) | 2017-02-01 |
Family
ID=54945936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510664217.7A Active CN105197898B (en) | 2015-10-14 | 2015-10-14 | Nitrogen making system for ship |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105197898B (en) |
| WO (1) | WO2017063380A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621376A (en) * | 2016-04-01 | 2016-06-01 | 成都科盛石油科技有限公司 | Pressure swing adsorption (PSA) nitrogen making system |
| CN105621375A (en) * | 2016-04-01 | 2016-06-01 | 成都科盛石油科技有限公司 | Pressure swing adsorption nitrogen generation system for lowering comprehensive cost of company |
| WO2017063380A1 (en) * | 2015-10-14 | 2017-04-20 | 杭州欧斯空分设备有限公司 | Nitrogen generating system for ships |
| CN108918789A (en) * | 2018-09-08 | 2018-11-30 | 深圳市能源环保有限公司 | A kind of purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas |
| CN111232938A (en) * | 2020-04-29 | 2020-06-05 | 山东恒业石油新技术应用有限公司 | Vehicle-mounted fast-moving type high-purity PSA nitrogen making and injecting equipment |
| CN112624065A (en) * | 2020-12-30 | 2021-04-09 | 海德威科技集团(青岛)有限公司 | Multifunctional marine nitrogen preparation device with safety redundancy and control method thereof |
| CN114733317A (en) * | 2022-05-10 | 2022-07-12 | 威海柏林圣康空氧科技有限公司 | Multi-level molecular sieve adsorption tower device |
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| WO2017063380A1 (en) * | 2015-10-14 | 2017-04-20 | 杭州欧斯空分设备有限公司 | Nitrogen generating system for ships |
| CN105621376A (en) * | 2016-04-01 | 2016-06-01 | 成都科盛石油科技有限公司 | Pressure swing adsorption (PSA) nitrogen making system |
| CN105621375A (en) * | 2016-04-01 | 2016-06-01 | 成都科盛石油科技有限公司 | Pressure swing adsorption nitrogen generation system for lowering comprehensive cost of company |
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| CN111232938A (en) * | 2020-04-29 | 2020-06-05 | 山东恒业石油新技术应用有限公司 | Vehicle-mounted fast-moving type high-purity PSA nitrogen making and injecting equipment |
| CN112624065A (en) * | 2020-12-30 | 2021-04-09 | 海德威科技集团(青岛)有限公司 | Multifunctional marine nitrogen preparation device with safety redundancy and control method thereof |
| CN112624065B (en) * | 2020-12-30 | 2023-10-27 | 海德威科技集团(青岛)有限公司 | Multifunctional marine nitrogen preparation device with safety redundancy and control method thereof |
| CN114733317A (en) * | 2022-05-10 | 2022-07-12 | 威海柏林圣康空氧科技有限公司 | Multi-level molecular sieve adsorption tower device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105197898B (en) | 2017-02-01 |
| WO2017063380A1 (en) | 2017-04-20 |
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