CN107000933A - The nitrogen supply (NS) system and method for storage tank - Google Patents
The nitrogen supply (NS) system and method for storage tank Download PDFInfo
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- CN107000933A CN107000933A CN201580062342.9A CN201580062342A CN107000933A CN 107000933 A CN107000933 A CN 107000933A CN 201580062342 A CN201580062342 A CN 201580062342A CN 107000933 A CN107000933 A CN 107000933A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/38—Means for reducing the vapour space or for reducing the formation of vapour within containers
- B65D90/44—Means for reducing the vapour space or for reducing the formation of vapour within containers by use of inert gas for filling space above liquid or between contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
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- Mechanical Engineering (AREA)
- Separation Of Gases By Adsorption (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to it is a kind of discharged again after inside upper part filling nitrogen in large space storage tank in order to obstruct contact with outside atmosphere when, the effectively sealed nitrogen supply (NS) devices and methods therefor of large space storage tank can be realized while nitrogen consumption is reduced.The present invention reduces the consumption of the energy by using the concentration according to nitrogen to the method for operation that the generation time is increased and decreased, additionally it is possible to generates substantial amounts of nitrogen with less expensive manufacturing cost and completes the filling of storage tank.
Description
Technical field
It is especially a kind of in the heat storage tank of air-conditioning system, in factory or workshop the present invention relates to a kind of nitrogen supply (NS) system
Etc. in the large space storage tanks such as the storage tanks of petrochemicals such as various tank bodies, the crude oil used in order to obstruct and outside atmosphere
Contact and when being discharged again after inside upper part filling nitrogen, can be realized while nitrogen consumption is reduced effective
The nitrogen supply (NS) devices and methods therefor of sealed large space storage tank.
Background technology
Generally, in the heat storage tank installed in provincialism air-conditioning system, in order to obstruct contact with outside atmosphere and
The inside upper part space (not water filled space) of heat storage tank using vapor (steam) be filled and without using air, this
It is referred to as " steam seal (steam sealing) "., can be because heat storage tank when taking steam seal mode as described above
The upper space of inner side is generally high temperature (98 DEG C) many wet conditions and causes the corrosion of heat storage tank top ferrous material, can also be because of guarantor
The convergent-divergent of adiabator and form crack and therefore cause the shortening in life-span and the increase of replacement cost.In addition, since it is desired that
Electric power needed for the electric heater and circulating pump of lasting supply generation steam, so its power consumption is higher.On solving
Problem is stated, can use and be filled into " nitrogen-sealed " mode inside heat storage tank to replace steam seal by nitrogen.
In addition, after factory, workshop etc. carry out water process (clean water treatment etc.) to engineering water, in order to formally use
Obstruct the contact with general atmosphere before and need to carry out nitrogen-sealed in storage tank, but because of the change of water level in storage tank
Change and need filling and the pump-down process of anti-corruption execution nitrogen.In this case, can because nitrogen disposable and
Discharge and cause a large amount of losses, so as to cause the increase for sealing cost.Can be by reusing accordingly, it would be desirable to work out one kind
The nitrogen discharged and reduce its scheme for sealing cost.
In addition, can be utilized in the storage tank of the petrochemicals such as the fuel gas and crude oil of liquid condition fire-retardant
Property nitrogen its inside upper part is sealed, in this case as the excessive discharge of nitrogen and cause the increasing of cost
Plus.In addition, equally nitrogen can be filled in tank interior prevent from exploding and to prevent the purposes such as corrosion under many circumstances,
In this case a kind of can solve the problem that because caused by the luxus consumption of nitrogen the problem of cost increase is needed.
The substantially mounting structure figure (a) of the nitrogen maker used in general nitrogen-sealed is illustrated in Fig. 1, and
For the chart illustrated to the nitrogen generated in nitrogen maker with the change in concentration and valve on-off action of time
(b)。
As shown in Fig. 1 (a), the nitrogen maker used in nitrogen-sealed is by receiving the pressure supplied by compressor
Contracting air and generate nitrogen, and the nitrogen generated temporarily be stored in surge tank after be supplied to each storage tank etc. again
Need the position of nitrogen.
Wherein, from compressor be fed to nitrogen maker in compressed air composition it is identical with the composition of air, by
78% nitrogen, 21% oxygen, 1% other materials are constituted, and nitrogen maker will be carried out to the oxygen in compressed air
Separation, so as to generate and supply the nitrogen-rich gas of 99.0%~99.9999% purity.
Specifically as shown in Fig. 1 (b), the nitrogen gas concn in initial compressed air is 78%, and in order to compress
Air supply is to nitrogen gas generator, and the valve A in Fig. 1 (a) will be opened.Simultaneously in order to prevent the leakage of compressed air, install
Exhaust valve B in nitrogen maker will be closed.Now in the outlet side of nitrogen maker, for discharging NITROGEN IN LOW CONCENTRATION
The valve C of gas will be opened, and with buffering tank connected valve D by the state in closing.In the above-described state, nitrogen maker will
Start working and the concentration of nitrogen gradually increases process over time, 99.9% is risen to from initial 78%.In nitrogen
The concentration of gas is risen to after 99.9%, and valve C will be closed and valve D will be opened, so as to generate for nitrogen-sealed highly concentrated
Degree nitrogen (being recited as the process for producing more than 99.9% nitrogen " generation nitrogen ") is simultaneously transplanted in surge tank.Generate nitrogen
Process will be interrupted after the lasting regular hour, and the nitrogen gas concn generated in nitrogen maker will be reduced again, this
When valve D will be closed.Next said process will be performed again after by the regular hour, so as to periodically generate nitrogen
Gas, and generally routinely generate certain density nitrogen by installing 2 nitrogen makers side by side.
In addition as Fig. 1 (b) shown in, start generate 98.0% nitrogen concentration time earlier than start generate 99.9% concentration
The time of nitrogen, and the nitrogen of 98.0% concentration terminates the duration T1 of generation and is longer than the nitrogen of 99.9% concentration from starting to be generated to
Terminate the duration T2 of generation from starting to be generated to.Therefore, it follows that 98.0% nitrogen growing amount is more than 99.9% generation
Amount.In addition, being usually required when using the nitrogen maker of PSA modes in order to generate 99.9% nitrogen in discharge compressed air
About 3/4ths (that is, a quarter only in compressed air is recovered and other parts will be discharged consumption), with this phase
Instead, in order to generate 98.0% nitrogen only need to discharge in compressed air 1/2nd or so and remaining 1/2nd will be by
Reclaim.That is, the nitrogen gas concn that nitrogen maker is generated is higher, relative to the air supply being flowed into nitrogen maker
Nitrogen growing amount is fewer, in contrast, and the nitrogen gas concn generated is higher, and the nitrogen growing amount relative to air supply is got over
It is many., can not only be empty because of compression when generating 98.0% nitrogen accordingly, with respect to the situation of 99.9% nitrogen concentration of generation
The consumption of gas is less and reduces the operation ratio of compressor, additionally it is possible to because nitrogen growing amount is more and is generated with relatively low cost
More nitrogen.
Use the mode for filling 99.9% nitrogen to storage tank from the beginning at present in this case, i.e. will
Start to generate and terminate to generate the time interval T2 of 99.9% nitrogen as the time difference, alternately to installed in nitrogen maker
The so-called time fixed opening and closing mode that the valve (valve A, B and C, D) of front-end and back-end is opened and closed.But for Large Copacity
Storage tank, if filling nitrogen in the state of initial inside upper part is full of by general air, even filling 99.9%
Nitrogen, its concentration can be also diluted, and be needed longer because of less relative to 99.9% nitrogen growing amount of compressed air
Time, while can also because of compressed air consumption it is more and cause the operation of the operation ratio of compressor and nitrogen maker
The problem of manufacturing cost increases such as rate increase.
The content of the invention
Technical problem
It is an object of the invention to solve above-mentioned use in existing storage tank existing to ask during nitrogen-sealed mode
Inscribe and provide it is a kind of can either reduce because sealing the increase of cost caused by the luxus consumption of nitrogen, while realizing effective
Sealing effectiveness, and the energy can be reduced to the method for operation that the generation time is increased and decreased by using the concentration according to nitrogen
Consumption, additionally it is possible to substantial amounts of nitrogen is generated with less expensive manufacturing cost and complete storage tank filling nitrogen supply (NS) device and its
Method.
Technical scheme
To achieve these goals, included according to the storage tank nitrogen supply (NS) system of the present invention：Compressor；Nitrogen is generated
Device, including receive the compressed air supplied by above-mentioned compressor and generate the nitrogen generating unit of nitrogen, to above-mentioned nitrogen generating unit
Nitrogen gas concn measuring instrument that the nitrogen gas concn generated is measured and the nitrogen supply (NS) for being generated above-mentioned nitrogen generating unit
Or stopping is fed to the supply control valve in storage tank；Concentration measuring instrument in tank, enters to the nitrogen gas concn of above-mentioned reservoir interior
Row is determined；And control unit, the work to whole system is controlled；Wherein, above-mentioned control unit is according to nitrogen gas concn measuring instrument
Or the nitrogen gas concn that concentration measuring instrument is determined in tank is controlled to above-mentioned supply control valve, so as to being fed to storage tank
In nitrogen gas concn be adjusted.
Wherein, above-mentioned control unit receives the nitrogen gas concn determined by nitrogen gas concn measuring instrument, and is judging to be determined
The nitrogen gas concn gone out opens supply control valve when having reached and having filled concentration initial stage, so that the nitrogen that default initial stage is filled into concentration is filled out
It is charged to the inside upper part space of storage tank；The nitrogen gas concn that concentration measuring instrument is determined in tank is received, and is being determined
Nitrogen gas concn supply control valve is controlled when reaching default benchmark concentration so that will be above benchmark concentration it is default after
The nitrogen of phase filling concentration is filled into the inside upper part space of storage tank, until reaching default aimed concn.
Wherein it is preferred to be, above-mentioned supply control valve is using the proportional control valve that can be adjusted to its aperture.
In addition, a kind of nitrogen supply (NS) system, it is characterised in that：Bottom side in above-mentioned storage tank inside upper part space
Air bleeding valve is equipped with, the air being initially filled with or the nitrogen having been filled with are discharged to by above-mentioned air bleeding valve when filling nitrogen to storage tank
It is outside.
Further, it is preferable to be to be equipped with recovery valve, above-mentioned recovery valve in the bottom side in above-mentioned storage tank inside upper part space
The nitrogen having been filled with into storage tank is reclaimed and above-mentioned compressor is supplied to, and is preferably, in addition to inflow gas
Selector valve, one end of above-mentioned inflow gas selector valve is connected with above-mentioned recovery valve and the front end of the other end and above-mentioned compressor connects
Connect, so as to which optionally atmospheric air or the nitrogen reclaimed are injected into compressor.
In addition, in another embodiment, it is therefore preferable to, the bottom side in above-mentioned storage tank inside upper part space is equipped with
Exhaust gas recovery selector valve, above-mentioned exhaust gas recovery selector valve by the air being initially filled with or has been filled with when filling nitrogen to storage tank
Nitrogen be discharged to the outside or the nitrogen having been filled with reclaimed and above-mentioned compressor is supplied to.
Further, it is preferable to be, in addition to inflow gas selector valve, one end and the above-mentioned recovery of above-mentioned inflow gas selector valve
Valve is connected and the front end of the other end and above-mentioned compressor is connected, so as to optionally by atmospheric air or the nitrogen reclaimed
It is injected into compressor.
In addition, according to the nitrogen supply (NS) method of the present invention, the nitrogen for first being filled into concentration default initial stage is filled into storage
The inside upper part space of tank, next judges whether the nitrogen gas concn in storage tank reaches default benchmark concentration, in storage tank
Interior nitrogen gas concn has reached after default benchmark concentration that the nitrogen that will be above the later stage filling concentration of said reference concentration is filled out
The inside of storage tank is charged to, until reaching default aimed concn.
Invention effect
By the present invention as described above, can be reduced when being sealed using nitrogen to the inside upper part of storage tank because
To seal the increase of cost caused by the luxus consumption of nitrogen, while realize effective sealing effectiveness, and can be by using
The consumption of the energy is reduced to the method for operation that the generation time is increased and decreased according to the concentration of nitrogen, additionally it is possible to less expensive life
Substantial amounts of nitrogen is generated into cost and completes the filling of storage tank.
Brief description of the drawings
Fig. 1 is the substantially mounting structure figure (a) of the nitrogen maker used in existing general nitrogen-sealed, and
For the chart illustrated to the nitrogen generated in nitrogen maker with the change in concentration and valve on-off action of time
(b)。
Fig. 2 is the structure chart of the nitrogen supply (NS) device according to the present invention.
Fig. 3 is the exemplary illustration schematic diagram of the nitrogen supply (NS) method according to the present invention.
Fig. 4 is each sequence of steps flow chart of the nitrogen supply (NS) method according to the present invention.
Wherein, description of reference numerals is as follows：
1 storage tank
10 compressors
12 inflow control valves
14 inflow side air bleeding valves
20 nitrogen makers
21 nitrogen generating units
22 surge tanks
24 nitrogen gas concn measuring instruments
26 air bleeding valves
28 supply control valves
60 nitrogen supply (NS) pipes
Concentration measuring instrument in 70 tanks
80 air bleeding valves
80' exhaust gas recovery selector valves
82 nitrogen recycling pipes
84 recovery valves
90 inflow gas selector valves
100 control units
Embodiment
Below, will be detailed to being carried out according to the nitrogen supply (NS) devices and methods therefor of the present invention with reference to accompanying drawing and preferred embodiment
Explanation.
It is an object of the present invention to the large space storage tank (1) (such as heat storage tank, oils that are filled up to initial stage by general air
Storage tank etc.) the internal nitrogen for supplying high concentration (90.0%~99.9999%).Even but as described above, from the beginning
The nitrogen of high concentration is just filled to the inside of storage tank (1), as mix and dilute with the air being initially filled with, from
And can not be full of using the nitrogen of high concentration but also be likely to result in dead band (dead zone) appearance, while can also cause
Generate the cost increase of nitrogen.In order to solve the above problems, lifted using relatively low nitrogen gas concn is kept when filling in the early stage
Its growing amount, so as to tentatively be filled with relatively low cost, next reaches suitably in the internal nitrogen gas concn of storage tank (1)
Concentration after lift the concentration of nitrogen generated in nitrogen maker (20) again so that most storage tank (1) is internal at last
Method of the gas displacement into required nitrogen-rich gas.
Therefore, according to the nitrogen supply (NS) device of the present invention as shown in Fig. 2 including compressor (10), inflow control valve
(12), nitrogen maker (20), nitrogen supply (NS) pipe (60), concentration measuring instrument (70), air bleeding valve (80), nitrogen recycling pipe in tank
(82), inflow gas selector valve (90) and control unit (100).
The compressed air of high pressure is supplied to the nitrogen subsequently illustrated and given birth to by compressor (10) by being compressed to gas
Grow up to be a useful person (20), the general air that can be sucked in air and generate compressed air, or as subsequently illustrated to being filled into storage tank 1
Nitrogen (hereinafter referred to as " engineering gas ") be compressed supply.
Inflow control valve (12) is provided to the rear end of above-mentioned compressor (10), for the compression for being generated compressor (10)
Air injects or stops being injected into nitrogen maker (20), is made up of motor-driven valve or magnetic valve.
Nitrogen maker (20) is connected to the rear end of inflow control valve (12), for the pressure supplied compressor (10)
Oxygen in contracting air is separated and removed and generates nitrogen, including nitrogen generating unit (21), surge tank (22), nitrogen gas concn
Measuring instrument (24), air bleeding valve (24), supply control valve (28).The type of above-mentioned nitrogen maker (20) generally includes PSA (transformations
Absorption, Pressure Swing Adsorption) mode and UF membrane (membrane) mode etc., below it is main to PSA modes
Illustrate.But, the nitrogen maker (20) of PSA modes is only an embodiment, and the present invention is not limited to above-mentioned PSA modes
Nitrogen maker (20).
The nitrogen maker (20) of PSA modes inside the nitrogen generating unit (21) of chamber form as shown in Fig. 2 to fill
The morphosis of the particle shape adsorbent of entitled CMS (carbon molecular sieve, Carbon Molecular Sieve), above-mentioned CMS is one
The adsorbent with the pore uniformly adjusted is planted, oxygen molecule (molecule is caused because of the difference of the diffusion velocity in pore
A diameter of adsorption rate 3.9) is more than nitrogen molecule (molecular diameter is 4.3).Although both in terms of equilibrium adsorption capacity almost
There is no difference, but its adsorption rate has the difference of (30) again above, so above-mentioned adsorption rate difference can be utilized, from pressure
The nitrogen of high-purity is separated except oxygen and generated in contracting air.The composition of nitrogen generating unit (21) as described above and work
Principle belongs to known information, herein by description is omitted.Further, it is preferable to be, above-mentioned nitrogen generating unit (21) uses chamber
The composition of room mode, but as long as nitrogen can be efficiently generated, is not limited its concrete mode.
Inflow side air bleeding valve (14) is while be connected to before the rear end of inflow control valve (12) and nitrogen maker (20)
Side is held, air or discharge nitrogen generation are discharged to the outside for the part in the compressed air that is generated compressor (10)
The low concentration nitrogen (the not up to nitrogen of preset concentration) that device (20) is generated, or the oxygen blow on CMS will be adsorbed
(furging) to outside.
Surge tank (22) inside nitrogen maker is connected to the rear end of nitrogen generating unit (21), for receiving nitrogen generation
Nitrogen that portion (21) is generated simultaneously is stored temporarily.
Nitrogen gas concn measuring instrument (24) is used to be measured the nitrogen gas concn generated in nitrogen generating unit (21), can be with
Using directly determining nitrogen gas concn or calculate the measuring instrument of nitrogen gas concn indirectly again after oxygen concentration is determined.
Air bleeding valve (26) is not reaching to preset concentration in the nitrogen gas concn that above-mentioned nitrogen gas concn measuring instrument (24) is determined
When be opened, for corresponding nitrogen to be discharged to the outside.
Supply control valve (28) is used to be generated by nitrogen generating unit (21) and temporarily stored to the nitrogen in surge tank (22)
Gas is supplied or stops being fed in storage tank (1), can be constituted using simple switch valve, but such as follow-up explanation, it is therefore preferable to,
The composition that its aperture is adjusted using the nitrogen gas concn that can be determined according to nitrogen gas concn measuring instrument 24.On supply
The method of work of control valve 28, will be illustrated in subsequent content.
The nitrogen discharged by above-mentioned supply control valve (28) is filled into the interior of storage tank (1) by nitrogen supply (NS) pipe (60)
Upper lateral part space.In addition, being measured in storage tank (1) equipped with concentration in the tank for being measured to the nitrogen gas concn filled
Instrument (70).
In addition, (a) of bottom side such as Fig. 2 in above-mentioned storage tank (1) inside upper part space is shown, it is therefore preferable to, match somebody with somebody
The air bleeding valve (80) that is discharged to the outside to the internal air of storage tank (1) or nitrogen will be had been filled with and for storage by being ready for use on
After the air initially filled up or the nitrogen filled are reclaimed and are supplied to during the inside upper part space filling nitrogen of tank (1)
Continue the recovery valve (84) in bright compressor (10).In addition, as shown in Fig. 2 (b), it is therefore preferable to, outfit can be selective
The exhaust gas recovery selector valve (80') that ground is discharged or reclaimed to the nitrogen having been filled with is to substitute air bleeding valve (80) and recovery valve
(84).Above-mentioned exhaust gas recovery selector valve (80') is used for when filling nitrogen to the inside upper part space of storage tank (1), will be initial
The air filled up or the nitrogen having been filled with are discharged to the outside, or the nitrogen (hereinafter referred to as " engineering gas ") having been filled with is carried out
Reclaim and be supplied to the compressor (10) subsequently illustrated, it is therefore preferable to, using three-way valve.
One end of inflow gas selector valve (90) is connected with above-mentioned air bleeding valve (84) or exhaust gas recovery selector valve (80'), separately
One end is connected with the front end of above-mentioned compressor (10), for the engineering gas for being selectively implanted atmospheric air or being reclaimed.On
Inflow gas selector valve (90) is stated for switching to reveal to change the gas type being injected into compressor (10), can
Constituted using three-way valve etc..
The overall work of nitrogen supply (NS) device according to the present invention stated above is controlled automatically by control unit (100)
System.Below, work and nitrogen of the Fig. 2 to Fig. 4 to the nitrogen supply (NS) device according to the present invention with said structure will be combined
Supply Method is described in detail.
The nitrogen final goal concentration (hereinafter referred to as " aimed concn ") in storage tank (1) is filled into according to storage tank
(1) purposes etc. and it is different, but generally can all be set to 99.0%~99.9% high-purity state.At present, in nitrogen
Discharged it during nitrogen gas concn miss the mark concentration generated in gas generating unit (21) to outside, and only reaching target
After concentration, nitrogen can be just filled into the upper inside space of storage tank (1) from the beginning.But as described above, be usually
The nitrogen of 99.9% aimed concn of generation needs longer time, therefore not only results in compressor (10) and nitrogen generating unit
(21) increase of operation ratio, and the growing amount of nitrogen also only has a quarter of compressed air or so.In addition, for large space
Storage tank (1), even being filled from the beginning with aimed concn, as the air internal with storage tank (1)
Dilution is obtained by mixing, so the filling time grown very much can not be full of and be needed by the nitrogen of high concentration.
Therefore, the present invention can't be filled out using aimed concn from the beginning when filling nitrogen to storage tank (1)
Fill, but as shown in figure 3, utilize setting concentration (hereinafter referred to as " initial stage of (such as 98.0%) lower than aimed concn in the early stage
Filling concentration ") nitrogen be filled, and after some time has elapsed the nitrogen gas concn in storage tank 1 rise to it is default
(being preferably more than aimed concn) higher than benchmark concentration is being utilized after finite concentration (hereinafter referred to as " benchmark concentration ")
The nitrogen of setting concentration (hereinafter referred to as " later stage fills concentration ") is filled, until reaching aimed concn.Below, it will combine
Fig. 4 is illustrated to each step of fill method as described above.
Initially, for storage tank (1) the upper inside space filled up using nitrogen displacement by air, as shown in figure 4, first
Nitrogen is filled so as to discharge the air inside storage tank 1 using concentration is filled default initial stage.Before filling nitrogen, initial
Storage tank (1) upper inside space filled up by air, and because comprising substantial amounts of moisture or because stored in above-mentioned air
Liquid and other gases produced, its air quality are less than general atmosphere air, preferably for be vented directly to it is outside and
Do not recycle.
Therefore, after nitrogen filling operation is initially started, control unit (100) opens the row being connected in storage tank (1)
Air valve (80) simultaneously drives compressor (10) to start working.When replacing air bleeding valve (80) equipped with exhaust gas recovery selector valve (80'),
Open the exhaust side of exhaust gas recovery selector valve (80') and be filled in internal air to discharge.At the same time, control unit (100)
Inflow gas selector valve (90) is switched to air inflow side and drives compressor (10) to start working.In compressor (10) quilt
After driving and generation compressed air, the compressed air generated will be by the inflow control valve opened by control unit (100)
(12) and it is fed in nitrogen maker (20).The nitrogen generating unit (21) of nitrogen maker (20) is to the oxygen in compressed air
Adsorbing separation is carried out, so as to generate nitrogen.The nitrogen gas concn that initial stage generates in nitrogen generating unit (21) is very low, from general big
It is that 78% beginning gradually rises along with the adsorbing separation of oxygen that gas, which constitutes the nitrogen gas concn planted,.
Next as shown in Fig. 2 the nitrogen of generation will be stored at surge tank (22) temporarily in nitrogen generating unit (21)
In, and the concentration of nitrogen is measured using nitrogen gas concn measuring instrument (24).Determined by above-mentioned nitrogen gas concn measuring instrument (24)
The nitrogen gas concn gone out will be transferred into control unit (100), and control unit (100) is less than default first in the nitrogen gas concn determined
Air bleeding valve (26) is opened when phase fills concentration to be discharged to the outside the nitrogen of low concentration, and is worked as determined nitrogen gas concn and reached
Initial stage is filled after concentration, close air bleeding valve (26) simultaneously open supply control valve (28) so that by nitrogen supply (NS) pipe (60) to
The nitrogen of concentration is filled in the inside upper part space filling of storage tank (1) initial stage.
Filled initial stage during concentration is filled in sustainable utilization, the nitrogen gas concn in storage tank (1) will be from initial stage
Concentration (about 78%) starts to be gradually increasing, and concentration measuring instrument (70) is internal to storage tank (1) in the tank in storage tank (1)
Nitrogen gas concn be measured.The nitrogen gas concn that concentration measuring instrument (70) is determined in tank will be sent to control unit (100),
Control unit (100) is reached in the nitrogen gas concn determined after default benchmark concentration (such as 97%, refering to Fig. 3), is controlled
(preferably adjusting aperture) supply control valve (28), so as to will be above the later stage filling concentration of benchmark concentration (such as 97%)
The nitrogen of (such as 99.9%) is filled into storage tank (1).
As described above, filling concentration is filled into concentration from initial stage when the concentration of nitrogen reaches benchmark concentration is converted to the later stage
The operation of concentration is filled, is completed by the work of supply control valve (28).Wherein it is preferred to be, above-mentioned supply control valve
(28) constituted using the proportional control valve that can be adjusted to its aperture, because according to the opening and closing of supply control valve (28)
Nitrogen gas concn generated in degree, nitrogen generating unit (21) also will be different.As described above, nitrogen generating unit (21) is interior
Portion includes entitled CMS absorption powder, when compressed air is by above-mentioned CMS oxygen will it is adsorbed and nitrogen will not be adsorbed and
It is expelled directly out, so as to generate the nitrogen of high concentration.Now, if supply control valve (28) is fully closed or only opened one
Point, then because holdup time of the compressed air in nitrogen generating unit (21) is elongated, more oxygen can be adsorbed to be lifted
The concentration of nitrogen, in contrast, if supply control valve (28) opening degree is larger, because compressed air is in nitrogen generating unit
(21) holdup time in shortens, so the adsorbance of oxygen tails off and the concentration of nitrogen will also be decreased.But, above-mentioned confession
Answer control valve (28) it is not necessary to adoption rate control valve constitute, also can be by opening even with simple open and close valve
Close the modes such as switching, open hour adjustment, the opening and closing of air bleeding valve (24) adjustment and switch its filling concentration.
Therefore, the inside of storage tank (1) is filled first with the nitrogen for filling concentration initial stage in the present invention, when
When the nitrogen gas concn for holding vessel (1) inside that concentration measuring instrument (70) is determined in tank reaches default benchmark concentration, by controlling
Portion (100) processed reduces the aperture of supply control valve (28), and the nitrogen gas concn for being generated nitrogen generating unit (21) is promoted to default
Later stage filling concentration, next recycle the later stage filling concentration nitrogen the inside of storage tank (1) is filled.
As described above, the nitrogen for being adjusted by the aperture to supply control valve (28) and filling concentration using the later stage enters
During row filling, the internal nitrogen gas concn of storage tank (1) will continue to rise since benchmark concentration.Concentration measuring instrument (70) is right in tank
Nitrogen gas concn in storage tank (1) is measured, when the nitrogen gas concn determined reaches default aimed concn, control unit
(100) air bleeding valve (80), recovery valve (84) or exhaust gas recovery selector valve are closed while supply control valve (28) are completely closed
(80') and the driving for stopping compressor (10), so as to complete the internal nitrogen displacement operation of storage tank (1).By repeating
Above-mentioned operation, the nitrogen in storage tank (1) can be replaced repeatedly.
In addition, when needing to be replaced as new nitrogen again after inside the supply of nitrogen to storage tank (1), can select
The nitrogen having been filled with is discharged to the outside by open air bleeding valve (80), or open recovery valve (84) returns the engineering gas reclaimed
Receive in nitrogen recycling pipe.As described above, when being reclaimed to engineering gas, by the way that compressor (10) front end will be arranged on
The stream of inflow gas selector valve (90) is switched to nitrogen recycling pipe (82) side, can be flowed into reclaimed engineering gas
Compressor (10) and replace atmospheric air.In addition, replacing air bleeding valve (80) and recovery when being equipped with exhaust gas recovery selector valve (80')
During valve (84), engineering gas can be discharged to the outside by opening the exhaust side of exhaust gas recovery selector valve (80'), or pass through
Opening recovery side can be by nitrogen recycling pipe (82) by the engineering gas reclaimed.Now, because the engineering gas reclaimed
Substantial amounts of moisture may be contained in body, therefore dehumidifier preferably is installed in the front end of compressor (10) in order to reduce humidity.
By mode as described above, the consumption of nitrogen can be reduced by means of the recycling of nitrogen, additionally it is possible to reduce nitrogen life
The operation ratio grown up to be a useful person, so as to realize the effect of energy-conservation and reduction operating cost.
Claims (9)
1. a kind of nitrogen supply (NS) system, it is characterised in that：
To the system of storage tank (1) the supply of nitrogen, including：
Compressor (10)；
Nitrogen maker (20), including receive the compressed air supplied by above-mentioned compressor (10) and generate the nitrogen generation of nitrogen
Portion (21), the nitrogen gas concn measuring instrument (24) being measured to the nitrogen gas concn that above-mentioned nitrogen generating unit (21) is generated and
Nitrogen supply (NS) or stopping that above-mentioned nitrogen generating unit (21) is generated are fed to the supply control valve in above-mentioned storage tank (1)
(28)；
Concentration measuring instrument (70) in tank, to above-mentioned storage tank (1), internal nitrogen gas concn is measured；And
Control unit (100), the work to whole system is controlled；
Wherein, above-mentioned control unit (100) is according to concentration measuring instrument (70) institute in above-mentioned nitrogen gas concn measuring instrument (24) or above-mentioned tank
The nitrogen gas concn determined is controlled to above-mentioned supply control valve (28), so as to the nitrogen being fed in above-mentioned storage tank (1)
Gas concentration is adjusted.
2. nitrogen supply (NS) system according to claim 1, it is characterised in that：
Above-mentioned control unit (100),
The nitrogen gas concn determined by above-mentioned nitrogen gas concn measuring instrument (24) is received, and is judging determined nitrogen gas concn
Above-mentioned supply control valve (28) is opened when filling concentration the initial stage of having reached, so that the nitrogen that default initial stage is filled into concentration is filled into
The inside upper part space of above-mentioned storage tank (1)；
The nitrogen gas concn that concentration measuring instrument (70) is determined in above-mentioned tank is received, and is reached in the nitrogen gas concn determined
Above-mentioned supply control valve (28) is controlled during default benchmark concentration, so as to will be above the filling of default later stage of benchmark concentration
The nitrogen of concentration is filled into the inside upper part space of above-mentioned storage tank (1), until reaching default aimed concn.
3. nitrogen supply (NS) system according to claim 1 or 2, it is characterised in that：
Above-mentioned supply control valve (28) is using the proportional control valve that can be adjusted to its aperture.
4. nitrogen supply (NS) system according to claim 1 or 2, it is characterised in that：
Bottom side in above-mentioned storage tank (1) inside upper part space is equipped with air bleeding valve (80), above-mentioned air bleeding valve (80) to
The air being initially filled with or the nitrogen having been filled with are discharged to the outside during above-mentioned storage tank (1) filling nitrogen.
5. nitrogen supply (NS) system according to claim 4, it is characterised in that：
Bottom side in above-mentioned storage tank (1) inside upper part space is equipped with recovery valve (84), and above-mentioned recovery valve (84) is to
The nitrogen of filling is reclaimed and is supplied to above-mentioned compressor (10).
6. nitrogen supply (NS) system according to claim 5, it is characterised in that also include：
Inflow gas selector valve (90), one end of above-mentioned inflow gas selector valve (90) is connected and another with above-mentioned recovery valve (84)
End is connected with the front end of above-mentioned compressor (10), so as to optionally be injected into atmospheric air or the nitrogen reclaimed
State in compressor (10).
7. nitrogen supply (NS) system according to claim 1 or 2, it is characterised in that：
Bottom side in above-mentioned storage tank (1) inside upper part space is equipped with exhaust gas recovery selector valve (80'), and above-mentioned exhaust is returned
Selector valve (80') is received to be discharged to the air being initially filled with or the nitrogen having been filled with when filling nitrogen to above-mentioned storage tank (1)
Outside is reclaimed to the nitrogen having been filled with and is supplied to above-mentioned compressor (10).
8. nitrogen supply (NS) system according to claim 7, it is characterised in that also include：
Inflow gas selector valve (90), one end of above-mentioned inflow gas selector valve (90) and above-mentioned exhaust gas recovery selector valve (80')
Connection and the other end is connected with the front end of above-mentioned compressor (10), so as to optionally by atmospheric air or the nitrogen reclaimed
Gas is injected into above-mentioned compressor (10).
9. a kind of nitrogen supply (NS) method, it is characterised in that：
The nitrogen for first being filled into concentration default initial stage is filled into the inside upper part space of storage tank, next judges above-mentioned storage
Whether the nitrogen gas concn in tank reaches default benchmark concentration, and the nitrogen gas concn in above-mentioned storage tank has reached default benchmark
After concentration, the nitrogen that will be above the later stage filling concentration of said reference concentration is filled into the inside of above-mentioned storage tank, until reaching
To default aimed concn.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2014-0161025 | 2014-11-18 | ||
| KR1020140161025A KR101722080B1 (en) | 2014-11-18 | 2014-11-18 | Nitrogen gas supply system for storage tank and the method thereof |
| PCT/KR2015/009999 WO2016080651A1 (en) | 2014-11-18 | 2015-09-23 | Storage tank nitrogen supply system and method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107000933A true CN107000933A (en) | 2017-08-01 |
Family
ID=56014140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580062342.9A Pending CN107000933A (en) | 2014-11-18 | 2015-09-23 | The nitrogen supply (NS) system and method for storage tank |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101722080B1 (en) |
| CN (1) | CN107000933A (en) |
| WO (1) | WO2016080651A1 (en) |
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| CN113003027A (en) * | 2021-03-24 | 2021-06-22 | 威特龙消防安全集团股份公司 | Safety protection system and method for floating-roof storage tank floating-plate bottom falling process |
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| KR101689275B1 (en) * | 2016-07-08 | 2017-01-03 | 최길운 | Apparatus for generating nitrogen oxide and system for generating nitrogen oxide ahving the same |
| KR102037661B1 (en) * | 2017-09-28 | 2019-10-29 | 한라아이엠에스 주식회사 | Gas Concentration Precision Control System |
| CN109488878B (en) * | 2018-12-07 | 2024-01-30 | 云南云天化石化有限公司 | Emptying nitrogen recovery system |
| CN110239852B (en) * | 2019-05-08 | 2023-11-14 | 江苏科威环保技术有限公司 | Oil storage tank top self-sealing and double-sealing combined system |
| KR102338579B1 (en) * | 2019-11-13 | 2021-12-14 | 한라아이엠에스 주식회사 | Method for controlling a nitrogen generator |
| KR20230173407A (en) | 2022-06-17 | 2023-12-27 | 한국철도기술연구원 | Container having internal and external gas input and method for controlling gas input of the same |
| KR20240074220A (en) | 2022-11-21 | 2024-05-28 | 한국철도기술연구원 | Storage container internal environment control system and method for controlling internal environment using the same |
| KR102655860B1 (en) * | 2023-01-16 | 2024-04-05 | 표우영 | High-speed high-concentration nitrogen injection device of controlled atmosphere container and method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20160059309A (en) | 2016-05-26 |
| KR101722080B1 (en) | 2017-03-31 |
| WO2016080651A1 (en) | 2016-05-26 |
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Application publication date: 20170801 |