CN109896508A - Novel swing adsorption nitrogen producing apparatus and its method for preparing nitrogen, nitrogen gas generating system - Google Patents
Novel swing adsorption nitrogen producing apparatus and its method for preparing nitrogen, nitrogen gas generating system Download PDFInfo
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- CN109896508A CN109896508A CN201910327859.6A CN201910327859A CN109896508A CN 109896508 A CN109896508 A CN 109896508A CN 201910327859 A CN201910327859 A CN 201910327859A CN 109896508 A CN109896508 A CN 109896508A
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 247
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 214
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 86
- 229910001873 dinitrogen Inorganic materials 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 92
- 239000003463 adsorbent Substances 0.000 claims abstract description 33
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 230000008929 regeneration Effects 0.000 claims abstract description 15
- 238000011069 regeneration method Methods 0.000 claims abstract description 15
- 230000007420 reactivation Effects 0.000 claims abstract description 9
- 230000009466 transformation Effects 0.000 claims description 3
- 238000000844 transformation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The present invention relates to a kind of novel swing adsorption nitrogen producing apparatus and its method for preparing nitrogen, nitrogen gas generating system.Wherein novel swing adsorption nitrogen producing apparatus includes the first adsorption tower, the second adsorption tower, vacuum pump, the first restriction orifice, air feeder, nitrogen gas tank and valve group.First restriction orifice is arranged between the first adsorption tower and the second adsorption tower, and first the gas outlet of adsorption tower be connected to the gas outlet of the second adsorption tower by the first restriction orifice, when the absorption of the first adsorption tower, first restriction orifice is for assisting adsorbent reactivation in the second adsorption tower, when the absorption of the second adsorption tower, the first restriction orifice is for assisting adsorbent reactivation in the first adsorption tower.Above-mentioned novel swing adsorption nitrogen producing apparatus can be realized the accurate control of air-flow between adsorption tower, additional adsorbents regeneration, and whole system pressure is lower, can reduce production cost.
Description
Technical field
The present invention relates to gas preparation technical fields, more particularly to novel swing adsorption nitrogen producing apparatus and its nitrogen side processed
Method, nitrogen gas generating system.
Background technique
Pressure-variable adsorption basic principle be there is different adsorption capacities at various pressures to adsorbate using adsorbent, and
And under a certain pressure to the characteristic by isolated admixture of gas each component with selection absorption.In adsorbent selection absorption
Under the conditions of, pressurized adsorbent removes raw material wherein impurity composition, depressurizes these impurity of desorption and regenerates adsorbent, therefore can
To separate the nitrogen in air, for preparing nitrogen.But the air pressure that existing making nitrogen by pressure swing adsorption field needs
High (>=0.5MPa), and a set of novel pressure varying adsorption nitrogen making system, it usually needs air compressor, cooling driers, tertiary filter,
The equipment such as air reservoir, two adsorption towers, a nitrogen storage tank, air compressor operating cost are high.And it also needs to regularly replace
Compressor accessory and filter, air reservoir, nitrogen storage tank, adsorption tower are also required to periodically do pressure vessel detection, maintenance
It is at high cost.
Summary of the invention
Based on this, it is necessary to aiming at the problem that how to reduce nitrogen cost processed, provide a kind of novel swing adsorption nitrogen producing apparatus
And its method for preparing nitrogen, nitrogen gas generating system.
A kind of novel swing adsorption nitrogen producing apparatus, comprising: the first adsorption tower, the second adsorption tower, vacuum pump, the first metering hole
Plate, air feeder, nitrogen gas tank and valve group；The valve group includes: the first intake valve, the second intake valve, the first air outlet valve, second
Air outlet valve, first row air valve and second row air valve；
The air inlet of first adsorption tower is connected to by first intake valve with the air feeder, first absorption
The air inlet of tower is connected to by the first row air valve with the vacuum pump, and the gas outlet of first adsorption tower passes through described the
One air outlet valve is connected to the nitrogen gas tank；
The air inlet of second adsorption tower is connected to by second intake valve with the air feeder, second absorption
The air inlet of tower is connected to by the second row air valve with the vacuum pump, and the gas outlet of second adsorption tower passes through described the
Two air outlet valves are connected to the nitrogen gas tank；
First restriction orifice is arranged between first adsorption tower and second adsorption tower, and described first inhales
The gas outlet of attached tower is connected to by first restriction orifice with the gas outlet of second adsorption tower, when first adsorption tower
When absorption, first restriction orifice is for assisting adsorbent reactivation in second adsorption tower, when second adsorption tower is inhaled
When attached, first restriction orifice is for assisting adsorbent reactivation in first adsorption tower.
Described first is arranged in a manner of being detachably connected and inhales for first restriction orifice in one of the embodiments,
Between attached tower and second adsorption tower；And the first restriction orifice setting are as follows: make first adsorption tower or described second
Adsorption tower carries out during once adsorbing, and the total of obtained gas is accounted for by the flow of the gas of first restriction orifice
The 3%-7% of amount.
The valve group further includes the first equalizing valve and the second equalizing valve in one of the embodiments,；Described first inhales
The air inlet of attached tower is connected to by first equalizing valve with the air inlet of second adsorption tower；First adsorption tower goes out
Port is connected to by second equalizing valve with the gas outlet of second adsorption tower.
In one of the embodiments, between the air inlet of first adsorption tower and the air inlet of second adsorption tower
It is provided with the second restriction orifice, and second restriction orifice is connected with first equalizing valve；And/or
It is provided with third restriction orifice between the gas outlet of first adsorption tower and the gas outlet of second adsorption tower,
And the third restriction orifice is connected with second equalizing valve.
The valve group in one of the embodiments, further include: third exhaust valve and the 4th exhaust valve, the third row
Air valve and the 4th exhaust valve are connected in parallel to each other；
The third exhaust valve is connected with the first row air valve and the second row air valve respectively, and being used for will be by described
The gas of first row air valve and the second row air valve is discharged to the external world；
4th exhaust valve is connected with the first row air valve and the second row air valve respectively, for making described first
Adsorption tower be connected to by the first row air valve with the vacuum pump, make second adsorption tower pass through the second row air valve and
The vacuum pump connection.
Using the method for above-mentioned novel swing adsorption nitrogen producing apparatus nitrogen, comprising the following steps:
Step (1): the air feeder is opened；
Step (2): opening first intake valve and first air outlet valve, adsorbs first adsorption tower；It opens
The second row air valve, opens the vacuum pump, and the second absorption tower pressure interior force is made to be reduced to less than or equal to -0.85bar,
Regenerate second adsorption tower；Close first intake valve, the first air outlet valve and second row air valve；
Step (3): the air feeder is opened, gas is provided；
Step (4): opening second intake valve and second air outlet valve, adsorbs second adsorption tower；It opens
The first row air valve, opens the vacuum pump, and the first absorption tower pressure interior force is made to be reduced to less than or equal to -0.85bar,
Regenerate first adsorption tower；Close second intake valve, the second air outlet valve and the first row air valve；
Step (5): circuiting sequentially the step of carrying out step (1)~step (4) described in n times, and n is whole more than or equal to 0
Number.
In one embodiment, after opening the second row air valve, opening the vacuum pump further includes before following
Step:
The third exhaust valve is opened, the 4th exhaust valve is closed, the second absorption tower pressure interior force is reduced, closes
The third exhaust valve opens the 4th exhaust valve, is connected to second adsorption tower with the vacuum pump；And/or
It is further comprising the steps of before opening the vacuum pump after opening the first row air valve:
The third exhaust valve is opened, the 4th exhaust valve is closed, the first absorption tower pressure interior force is reduced, closes
The third exhaust valve opens the 4th exhaust valve, is connected to first adsorption tower with the vacuum pump.
In one embodiment, it after the step of closing first intake valve, the first air outlet valve and second row air valve, beats
It is further comprising the steps of before the step of opening second intake valve and second air outlet valve, adsorbing second adsorption tower:
First equalizing valve and second equalizing valve are opened, is made in first adsorption tower and second adsorption tower
Air pressure balance.
A kind of novel pressure varying adsorption nitrogen making system, including above-mentioned novel swing adsorption nitrogen producing apparatus and confined space, institute
The air feeder for stating novel swing adsorption nitrogen producing apparatus is connected to the gas outlet of the confined space, the novel pressure-variable adsorption
The nitrogen gas tank of nitrogen-making device is connected to the air inlet of the confined space.
In one embodiment, above-mentioned novel pressure varying adsorption nitrogen making system further includes third intake valve and the 4th air inlet
Valve, the third intake valve is arranged between the air feeder and the gas outlet of the confined space, described closed for controlling
Gas in space enters the air feeder；
4th intake valve is in parallel with the third intake valve, enters the air feeder for controlling extraneous air.
On the one hand above-mentioned novel swing adsorption nitrogen producing apparatus uses vacuum pump to control the first adsorption tower and the second adsorption tower
Interior pressure, additional adsorbents regeneration, improves adsorbent adsorption efficiency, reduces system pressure, and then reduce equipment requirement, extension is set
Standby service life, reduces production cost.On the other hand above-mentioned novel swing adsorption nitrogen producing apparatus is provided with the first restriction orifice, by
It is being adsorbed in an adsorption tower, when another adsorption tower regenerates, there are certain pressure differences between two adsorption towers, can force suction
Gas in attached adsorption tower is entered in regenerated adsorption tower by the first restriction orifice with certain flow velocity, and then to regeneration
Adsorbent is purged in adsorption tower, can further cocatalyst be regenerated, be improved the service life of adsorbent.
In addition, the first restriction orifice structure is simple, cost is relatively low, and the aperture of metering hole is relatively easy to control, it is only necessary to according to nitrogen
Gas gas production, adsorbent inventory, nitrogen gas purity etc. are adjusted aperture and accurate gas flow can be realized in debugging
Control.Compared to the precision that gas flow can be significantly increased in the control of the valves such as needle-valve and shut-off valve, gas is avoided to flow through
It causing to waste greatly, air-flow is too small to be unable to reach the regenerated purpose of additional adsorbents, and then next circulation nitrogen yield is caused to reduce, and
It can also avoid valve opening offset in transit and influence equipment precision.
Detailed description of the invention
Fig. 1 is the novel swing adsorption nitrogen producing apparatus schematic diagram of an embodiment；
Fig. 2 is the schematic diagram of the first restriction orifice in novel swing adsorption nitrogen producing apparatus shown in Fig. 1；
Fig. 3 is the novel pressure varying adsorption nitrogen making system schematic diagram of an embodiment.
Specific embodiment
To facilitate the understanding of the present invention, below will to invention is more fully described, and give it is of the invention compared with
Good embodiment.But the invention can be realized in many different forms, however it is not limited to embodiment described herein.Phase
Instead, purpose of providing these embodiments is makes the disclosure of the present invention more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
As shown in Figure 1, the novel swing adsorption nitrogen producing apparatus 10 of an embodiment of the present invention include: the first adsorption tower 100,
Second adsorption tower 200, vacuum pump 300, the first restriction orifice 400, air feeder 500, nitrogen gas tank 600 and valve group 700；Valve group
700 include: the first intake valve 701, the second intake valve 702, the first air outlet valve 703, the second air outlet valve 704, first row air valve 705
With second row air valve 706.
It is intelligible, it is provided with the adsorbent for adsorbing contaminant in the first adsorption tower 100 and the second adsorption tower 200, inhales
Attached dose can use existing nitrogen absorber processed, such as carbon molecular sieve etc. is not specially limited herein.Vacuum pump 300, air feeder
500 and nitrogen gas tank 600 can use this field conventional equipment, be not specially limited herein.In one embodiment, air feeder
500 can be provided bigger air quantity under equal-wattage, can be reduced investment for high-pressure frequency-conversion blower using high-pressure frequency-conversion blower
Cost and maintenance operation cost.
Air feeder 500 is that the first adsorption tower 100 and the second adsorption tower 200 provide pressure, can according to need to pressure into
Row is adjusted.In one embodiment, the pressure that air feeder 500 provides is 0.2bar-1bar.In addition, the first adsorption tower 100, second
Pressure≤1bar in adsorption tower 200 and nitrogen gas tank 600 can reduce manufacture and maintenance cost without carrying out pressure container standard.
The air inlet 101 of first adsorption tower 100 is connected to by the first intake valve 701 with air feeder 500, the first adsorption tower
100 air inlet 101 is connected to by first row air valve 705 with vacuum pump 300, and the gas outlet 102 of the first adsorption tower 100 passes through the
One air outlet valve 703 is connected to nitrogen gas tank 600.
The air inlet 201 of second adsorption tower 200 is connected to by the second intake valve 702 with air feeder 500, the second adsorption tower
200 air inlet 201 is connected to by second row air valve 706 with vacuum pump 300, and the gas outlet of the second adsorption tower 200 passes through second
Air outlet valve 704 is connected to nitrogen gas tank 600.
It is understood that it is provided with corresponding pipeline between interconnected valve and between equipment that valve communicates therewith,
The material and its caliber size of pipeline can use conventional arrangement.In addition, each valve can be moved using automatically controlled, magnetic, electricity-magnetic is dynamic,
The valves such as gas control, are not specially limited herein.
First restriction orifice 400 is arranged between the first adsorption tower 100 and the second adsorption tower 200, and the first adsorption tower 100
Gas outlet 102 be connected to the gas outlet 202 of the second adsorption tower 200 by the first restriction orifice 400, when the first adsorption tower 100
When absorption, the first restriction orifice 400 is for assisting adsorbent reactivation in the second adsorption tower 200, when the second adsorption tower 200 adsorbs
When, the first restriction orifice 400 is for assisting adsorbent reactivation in the first adsorption tower 100.
Wherein, the first adsorption tower 100 and second can be arranged in the first restriction orifice 400 by the way of being detachably connected
Between adsorption tower 200.By using the mode being detachably connected, can be convenient according to nitrogen demand processed to the first restriction orifice 400
It is replaced, to guarantee the accurate adjusting of air-flow.As shown in Fig. 2, the first restriction orifice 400 includes matrix 401, and opened on matrix
Equipped at least one metering hole 402, the cross sectional shape of metering hole is not particularly limited, and can be any regular or irregular shape.
In one embodiment, the first restriction orifice 400 is arranged are as follows: what the first adsorption tower 100 or the second adsorption tower 200 were once adsorbed
In the process, the 3%-7% of the total amount of obtained gas is accounted for, by the flow of the gas of the first restriction orifice 400 to avoid gas
While body wastes, maximum, which limits, promotes adsorbent reactivation.
In one embodiment, nitrogen purity processed is 99.5%, and nitrogen flow processed is 22m3/ hour -28m3/ hour, in the unit time
Pass through the gas flow of the first restriction orifice 400 are as follows: 0.70m3/ hour -0.80m3/ hour.In one embodiment, nitrogen purity processed
It is 99.5%, nitrogen flow processed is 25m3/ hour, the unit time interior gas flow for passing through the first restriction orifice 400 are as follows: 0.75m3/
Hour.
In one embodiment, metering hole is round hole, can be according to nitrogen gas production, adsorbent inventory, nitrogen gas purity
Deng to metering hole aperture and number be adjusted, with avoid waste gas while, promote the regeneration of adsorbent.It is real one
It applies in example, the diameter of metering hole is 0.9mm-1.3mm.In addition, when offering several metering holes on the first restriction orifice 400,
The arrangement mode of each metering hole is not particularly limited.
The matrix 401 of first restriction orifice 400 can use arbitrarily can be with material.In one embodiment, matrix 401 is steel
Plate.
In addition, valve group 700 further includes the first equalizing valve 707 and the second equalizing valve 708；The air inlet of first adsorption tower 100
Mouth 101 is connected to by the first equalizing valve 707 with the air inlet 201 of the second adsorption tower 200；The gas outlet 102 of first adsorption tower 100
It is connected to by the second equalizing valve 708 with the gas outlet 202 of the second adsorption tower 200.
The first adsorption tower 100 and the second adsorption tower may be implemented by the first equalizing valve 707 of setting and the second equalizing valve 708
200 pressure reduces the burden of vacuum pump while recovery section gas, reduces and be produced into while improving nitrogen gas purity
This.
Furthermore, it is possible to be arranged between the air inlet 101 of the first adsorption tower 100 and the air inlet 201 of the second adsorption tower 200
Second restriction orifice 800, and the second restriction orifice 800 is connected with the first equalizing valve 707, it can going out in the first adsorption tower 100
Between port 102 and the gas outlet 202 of the second adsorption tower 200 be arranged third restriction orifice 900, and third restriction orifice 900 with
The series connection of second equalizing valve 708.
It should be noted that one or two can be optionally arranged in the second restriction orifice 800 and third restriction orifice 900,
It is not specially limited herein.By setting the second restriction orifice 800 and third restriction orifice 900, respectively with the first equalizing valve 707
Cooperate with the second equalizing valve 708, makes the gas of side's adsorption tower is stable to enter in another party's adsorption tower, prevent gas shock
Suction-operated that is fast and influencing adsorbent, usual adsorbent need the regular hour when adsorbed gas, if quickly into
Enter adsorption tower, will lead to low-purity nitrogen gas and enter the higher bed of adsorption tower, influences adsorbent next time and adsorb.And it only needs to second
The pore size and number of restriction orifice 800 and third restriction orifice 900 are adjusted, while pressure can be realized, to gas
The accurate adjusting of flow velocity degree increases production cost without additional.Moreover it is possible to avoid the first equalizing valve 707 and the second equalizing valve
The inhomogenous problem of air velocity caused by 708 valves offset etc., while can also reduce and calibration maintenance etc. is carried out to equalizing valve
Frequency.
In one embodiment, during the first adsorption tower 100 or the second adsorption tower 200 are once adsorbed, pass through
The flow of the gas of two restriction orifices 800 and/or third restriction orifice 900 accounts for the 2%-10% of the total amount of obtained gas,
It is preferred that 3%-6%.
It can be according to nitrogen gas production, adsorbent inventory, nitrogen gas purity etc. to the second restriction orifice 800 and third current limliting
The aperture of the metering hole of orifice plate 900 and number are adjusted, on the basis of avoiding gas from wasting, to reduce the negative of vacuum pump
Load.
In addition, valve group 400 can also include: third exhaust valve 709 and the 4th exhaust valve 710,709 He of third exhaust valve
4th exhaust valve 710 is connected in parallel to each other.Wherein, third exhaust valve 709 is gone here and there with first row air valve 705 and second row air valve 706 respectively
Connection, for the external world will to be discharged to by the gas of first row air valve 705 and second row air valve 706.4th exhaust valve 710 is respectively with
One exhaust valve 705 and second row air valve 706 are connected, for making the first adsorption tower 100 and the second adsorption tower 200 respectively by first
Exhaust valve 705 and second row air valve 706 are connected to vacuum pump 300.Wherein, the 4th exhaust valve 710 can be pneumatic operated valve, herein not
It is particularly limited to.
Pass through the 4th exhaust valve that the third exhaust valve 709 for being in communication with the outside is set and is connected to vacuum pump 300
710, adsorption tower can be in communication with the outside before starting vacuum pump 300, by pressure drop to after certain value again with vacuum pump 300
Connection can be effectively reduced the burden of vacuum pump 300, improve the service life of vacuum pump 300, reduce maintenance cost.
Furthermore valve group 400 can also include third air outlet valve 711 and the 4th air outlet valve 712, and third air outlet valve 711 divides
It does not connect with the first air outlet valve 703 and the second air outlet valve 704, for controlling from 704 row of the first air outlet valve 703 or the second air outlet valve
The gas removed enters nitrogen gas tank 600.The gas outlet of nitrogen gas tank 600 is arranged in 4th air outlet valve 712, and being used for will be in nitrogen gas tank 600
Gas is discharged to required space.
In addition, flowmeter can be set between each valve, for monitoring air-flow.In one embodiment, third air outlet valve 711
Flowmeter 1000 is provided between nitrogen gas tank 600.Low-pressure air passes through the first adsorption tower 100 or the second adsorption tower 200, passes through
Control to each valve, and then nitrogen output flow is controlled, the flow velocity that air passes through adsorption tower is reduced, guarantees the first adsorption tower
100 or second there is certain pressure (0.2~0.8bar adjusts pressure as needed) in adsorption tower 200 by flowmeter 1000,
And then enter nitrogen gas tank 600, then control externally for nitrogen flow by the 4th air outlet valve 712, it is certain to guarantee that nitrogen gas tank 600 has
Positive pressure.
It should be noted that the quantity of above-mentioned valve with the same function is not particularly limited, can according to actual needs,
Two or more valves with the same function are connected, to improve the control precision of air-flow.
Above-mentioned 10 one side of novel swing adsorption nitrogen producing apparatus controls the first adsorption tower 100 and using vacuum pump 300
Pressure in two adsorption towers 200, additional adsorbents regeneration improve adsorbent adsorption efficiency, and reduce the adsorptive pressure of system, in turn
Equipment requirement is reduced, service life of equipment is extended, reduces production cost.On the other hand above-mentioned novel swing adsorption nitrogen producing apparatus 10
Provided with the first restriction orifice 400, since an adsorption tower is adsorbing, when another adsorption tower regenerates, between two adsorption towers
There are certain pressure difference, the gas in the adsorption tower of absorption can be forced by the first restriction orifice 400, utilize the first metering hole
The metering function of plate 400, nitrogen with certain flow velocity enter regenerated adsorption tower in, and then to adsorbent in regenerative adsorption tower into
Row purging, enables adsorbent that oxygen to be desorbed as far as possible, can adsorb more oxygen in next adsorption cycle, improve and inhale
Attached dose of service life.
In addition, 400 structure of the first restriction orifice is simple, cost is relatively low, and aperture is relatively easy to control, it is only necessary to produce gas according to nitrogen
Amount, adsorbent inventory, nitrogen gas purity etc. aperture are adjusted the control that accurate gas flow can be realized in debugging.
Compared to the precision that gas flow can be significantly increased in the control of the valves such as needle-valve and shut-off valve, avoid air-flow is excessive from causing wave
Take, air-flow is too small to be unable to reach the regenerated purpose of additional adsorbents, and then next circulation nitrogen yield is caused to reduce, and it can be with
It avoids valve opening offset in transit and influences equipment precision.
Above-mentioned novel swing adsorption nitrogen producing apparatus 10 works at lower pressures (≤1bar), can reduce equipment and want
It asks, reduces manufacture and maintenance cost.
The method of the nitrogen processed of an embodiment of the present invention, comprising the following steps:
S101: gas supply, specifically: opening air feeder 500, provide compressed gas for system.
In one embodiment, air feeder is high-pressure frequency-conversion blower, atmospheric pressure 0.2-1bar.It can according to need adjustment
Blower frequency, to provide the gas of different pressures and air quantity.Wherein, gas source can be atmosphere or such as storeroom confined air
Between.
The absorption of first adsorption tower 100, the regeneration of the second adsorption tower 200, specifically includes the following steps:
(1) the first intake valve 701 and the first air outlet valve 703 are opened, the first adsorption tower 100 is adsorbed.Open simultaneously second
Exhaust valve 706 and third exhaust valve 709 close the 4th exhaust valve 710, pressure in the second adsorption tower 200 are made to drop to 0bar.
(2) third exhaust valve 709 is closed, the 4th exhaust valve 710 is opened, since pressure is 0bar in the second adsorption tower 200,
The burden of vacuum pump 300 can be reduced, the service life of vacuum pump 300 is extended.Vacuum pump 300 is opened, the second adsorption tower 100 is made
Interior pressure is reduced to less than or equal to -0.85bar, regenerates the second adsorption tower 100.
It can be appreciated to omit the third exhaust valve 709 in step (1), the 4th exhaust valve 710 is directly opened.Because
Provided with third exhaust valve 709, the pressure of the second adsorption tower 200 can be reduced to 0bar, be lowered into the gas pressure of vacuum pump
Power can reduce the burden of vacuum pump 300, extend service life of vacuum pump, reduce the maintenance cost of vacuum pump.
(3) after regeneration ending, the first intake valve 701, the first air outlet valve 703, second row air valve 706 are closed.
S102: pressing, specifically the following steps are included:
The first equalizing valve 707 and the second equalizing valve 708 are opened, air pressure in the first adsorption tower 100 and the second adsorption tower 200 is made
Balance.
The intelligible step S102 that can be omitted directly carries out the absorption of the second adsorption tower 200, and the first adsorption tower 100 is regenerated
Step can further decrease production cost by the step of pressing with recovery section gas.
S103: gas supply, specifically: opening air feeder, gas is provided.
The step is no longer repeated herein with step S101.
The absorption of second adsorption tower 200, the regeneration of the first adsorption tower 100, specifically includes the following steps:
(1) the second intake valve 702 and the second air outlet valve 704 are opened, the second adsorption tower 200 is adsorbed.Open simultaneously first
Exhaust valve 705 and third exhaust valve 709 close the 4th exhaust valve 710, pressure in the first adsorption tower 100 are made to drop to 0bar.
(2) third exhaust valve 709 is closed, the 4th exhaust valve 710 is then opened, since pressure is in the first adsorption tower 100
0bar can reduce the burden of vacuum pump 300, extend the service life of vacuum pump 300.Vacuum pump 300 is opened, the first absorption is made
Pressure is reduced to less than or equal to -0.85bar in tower 100, regenerates the first adsorption tower 100.
It can be appreciated to omit the third exhaust valve 709 in step (1), the 4th exhaust valve 710 is directly opened.Because
Provided with third exhaust valve 709, the pressure of the first adsorption tower 100 can be reduced to 0bar, be lowered into the gas pressure of vacuum pump
Power can reduce the burden of vacuum pump 300, extend service life of vacuum pump, reduce the maintenance cost of vacuum pump.
(3) after regeneration ending, the second intake valve 702, the second air outlet valve 704, first row air valve 705 are closed.
S104: the first equalizing valve 707 and the second equalizing valve 708 are opened, the first adsorption tower 100 and the second adsorption tower 200 are made
Interior air pressure balance.
The step is identical as step S102, and details are not described herein.
S105: circuiting sequentially and carry out n times above-mentioned steps S101-S104, and n is the integer more than or equal to 0.
Circulation continual can prepare nitrogen repeatedly.
It is as shown in table 1 to close situation for the valve opening of each step in above-described embodiment.
Note: OFF indicates that closing, ON indicate to open in table 1.
As shown in Fig. 2, the novel pressure varying adsorption nitrogen making system of an embodiment of the present invention, inhales including above-mentioned novel transformation
Attached nitrogen-making device 10 and confined space 20, the air feeder 500 of novel swing adsorption nitrogen producing apparatus 10 and the outlet of confined space 20
Mouth connection, the nitrogen gas tank 600 of novel swing adsorption nitrogen producing apparatus 10 are connected to the air inlet of confined space 20.
Wherein, confined space 20, which refers to, needs to provide bunker etc., such as food fresh keeping workshop of nitrogen etc..By will be close
It closes space 20 to be connected to novel swing adsorption nitrogen producing apparatus 10, enters the gas in confined space 20 by air feeder 500 new
Type swing adsorption nitrogen producing apparatus 10, the nitrogen that novel swing adsorption nitrogen producing apparatus 10 generates enter confined air by nitrogen gas tank 600
Between 20, form the process of a circulation, repeatedly, not only guarantee demand of the confined space 20 to nitrogen, while novel transformation
Adsorption nitrogen making device 10 does not stop to replace to air in confined space, when the device is running between it is more long when, in confined space 20
Nitrogen gas concn it is higher and higher, air feeder 500 provide compressed air nitrogen gas purity it is also higher and higher, manufacture same flow nitrogen
When gas, the novel generation of swing adsorption nitrogen producing apparatus 10 nitrogen gas purity is higher, i.e. production nitrogen flow is higher.
Novel swing adsorption nitrogen producing apparatus 10 is identical as above structure and connection type, and this will not be repeated here.
In one embodiment, above-mentioned novel pressure varying adsorption nitrogen making system further includes third intake valve 713 and the 4th intake valve
714, third intake valve 713 is arranged between air feeder 500 and the gas outlet of confined space 20, for controlling in confined space 20
Gas enter air feeder 500.4th intake valve 714 is in parallel with third intake valve 713, and the air for controlling extraneous enters confession
Mechanism of qi 500.
By the cooperation of third intake valve 713 and the 4th intake valve 714, to guarantee the pressure in confined space 20.Such as
Third intake valve 713 and the 4th intake valve 714 use interlocking mode, when the opening of third intake valve 713, the 4th intake valve 714
It closes；When the 4th intake valve 714 close, third intake valve 713 open, so by control third intake valve 713 and the 4th into
The opening and closing time of air valve 714 makes to enter confined space to guarantee the minimum pressure and maximum pressure in confined space 20
Nitrogen flow in 20 is equal to the flow that air feeder 500 is arrived by third intake valve 713.Therefore it can also preset in confined space 20
Pressure realizes automation control to adjust the opening time of third intake valve 713 and the 4th intake valve 714.
The method of the novel pressure varying adsorption nitrogen making system nitrogen of one embodiment of the invention, comprising the following steps:
S201: gas supply, specifically: according to pressure condition in confined space 20, selectively unlocking third intake valve 713 or the
Four intake valves 714 provide confined space or the gas in the external world with one using the effect of air feeder 50 by air feeder 500
The gas of constant-pressure.
In one embodiment, air feeder is high-pressure frequency-conversion blower, atmospheric pressure 0.2-1bar.It can according to need adjustment
Blower frequency, to provide the gas of different pressures and air quantity.Wherein, gas source can be atmosphere or such as storeroom confined air
Between.
The absorption of first adsorption tower 100, the regeneration of the second adsorption tower 200, specifically includes the following steps:
(1) the first intake valve 701 and the first air outlet valve 703 are opened, the first adsorption tower 100 is adsorbed.Open simultaneously second
Exhaust valve 706 and third exhaust valve 709 close the 4th exhaust valve 710, pressure in the second adsorption tower 200 are made to drop to 0bar.
(2) third exhaust valve 709 is closed, the 4th exhaust valve 710 is opened, since pressure is 0bar in the second adsorption tower 200,
The burden of vacuum pump 300 can be reduced, the service life of vacuum pump 300 is extended.Vacuum pump 300 is opened, the second adsorption tower 100 is made
Interior pressure is reduced to less than or equal to -0.85bar, regenerates the second adsorption tower 100.
It can be appreciated to omit the third exhaust valve 709 in step (1), the 4th exhaust valve 710 is directly opened.Because
Provided with third exhaust valve 709, the pressure of the second adsorption tower 200 can be reduced to 0bar, be lowered into the gas pressure of vacuum pump
Power can reduce the burden of vacuum pump 300, extend service life of vacuum pump, reduce the maintenance cost of vacuum pump.
(3) after regeneration ending, the first intake valve 701, the first air outlet valve 703, second row air valve 706 are closed.
S202: pressing, specifically the following steps are included:
The first equalizing valve 707 and the second equalizing valve 708 are opened, air pressure in the first adsorption tower 100 and the second adsorption tower 200 is made
Balance.
The intelligible step S202 that can be omitted directly carries out the absorption of the second adsorption tower 200, and the first adsorption tower 100 is regenerated
Step can further decrease production cost by the step of pressing with recovery section gas.
S203: gas supply, specifically:
According to pressure condition in confined space 20, third intake valve 713 or the 4th intake valve 714 are selectively unlocked, is made close
The gas for closing space or the external world provides the gas with certain pressure using the effect of air feeder 50 by air feeder 500.
The step is no longer repeated herein with step S201.
The absorption of second adsorption tower 200, the regeneration of the first adsorption tower 100, specifically includes the following steps:
(1) the second intake valve 702 and the second air outlet valve 704 are opened, the second adsorption tower 200 is adsorbed.Open simultaneously first
Exhaust valve 705 and third exhaust valve 709 close the 4th exhaust valve 710, pressure in the first adsorption tower 100 are made to drop to 0bar.
(2) third exhaust valve 709 is closed, the 4th exhaust valve 710 is then opened, since pressure is in the first adsorption tower 100
0bar can reduce the burden of vacuum pump 300, extend the service life of vacuum pump 300.Vacuum pump 300 is opened, the first absorption is made
Pressure is reduced to less than or equal to -0.85bar in tower 100, regenerates the first adsorption tower 100.
It can be appreciated to omit the third exhaust valve 709 in step (1), the 4th exhaust valve 710 is directly opened.Because
Provided with third exhaust valve 709, the pressure of the first adsorption tower 100 can be reduced to 0bar, be lowered into the gas pressure of vacuum pump
Power can reduce the burden of vacuum pump 300, extend service life of vacuum pump, reduce the maintenance cost of vacuum pump.
(3) after regeneration ending, the second intake valve 702, the second air outlet valve 704, first row air valve 705 are closed.
S204: the first equalizing valve 707 and the second equalizing valve 708 are opened, the first adsorption tower 100 and the second adsorption tower 200 are made
Interior air pressure balance.
The step is identical as step S202, and details are not described herein.
S205: circuiting sequentially and carry out n times above-mentioned steps S201-S204, and n is the integer more than or equal to 0.
Circulation continual can prepare nitrogen repeatedly.When novel 10 runing time of swing adsorption nitrogen producing apparatus is got over
When long, the nitrogen gas concn in confined space 20 is higher and higher, and the nitrogen gas purity for the compressed gas that air feeder provides is also higher and higher,
When manufacturing same flow nitrogen, novel swing adsorption nitrogen producing apparatus generation nitrogen gas purity is higher, i.e. production nitrogen flow is higher.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of novel swing adsorption nitrogen producing apparatus characterized by comprising the first adsorption tower, the second adsorption tower, vacuum pump,
First restriction orifice, air feeder, nitrogen gas tank and valve group；The valve group includes: the first intake valve, the second intake valve, first
Air outlet valve, the second air outlet valve, first row air valve and second row air valve；
The air inlet of first adsorption tower is connected to by first intake valve with the air feeder, first adsorption tower
Air inlet is connected to by the first row air valve with the vacuum pump, and the gas outlet of first adsorption tower goes out by described first
Air valve is connected to the nitrogen gas tank；
The air inlet of second adsorption tower is connected to by second intake valve with the air feeder, second adsorption tower
Air inlet is connected to by the second row air valve with the vacuum pump, and the gas outlet of second adsorption tower goes out by described second
Air valve is connected to the nitrogen gas tank；
First restriction orifice is arranged between first adsorption tower and second adsorption tower, and first adsorption tower
Gas outlet be connected to the gas outlet of second adsorption tower by first restriction orifice, when first adsorption tower absorption
When, first restriction orifice is for assisting adsorbent reactivation in second adsorption tower, when second adsorption tower absorption,
First restriction orifice is for assisting adsorbent reactivation in first adsorption tower.
2. novel swing adsorption nitrogen producing apparatus according to claim 1, which is characterized in that first restriction orifice is with can
The mode of dismantling connection is arranged between first adsorption tower and second adsorption tower；And the first restriction orifice setting
Are as follows: it carries out first adsorption tower or second adsorption tower during once adsorbing, passes through first restriction orifice
Gas flow account for obtained gas total amount 3%-7%.
3. novel swing adsorption nitrogen producing apparatus according to claim 2, which is characterized in that the valve group further includes first
Equalizing valve and the second equalizing valve；The air inlet of first adsorption tower passes through first equalizing valve and second adsorption tower
Air inlet connection；The gas outlet of first adsorption tower is connected by the gas outlet of second equalizing valve and second adsorption tower
It is logical.
4. novel swing adsorption nitrogen producing apparatus according to claim 3, which is characterized in that the air inlet of first adsorption tower
The second restriction orifice, and second restriction orifice and described first are provided between mouth and the air inlet of second adsorption tower
Equalizing valve series connection；And/or
Third restriction orifice, and institute are provided between the gas outlet of first adsorption tower and the gas outlet of second adsorption tower
Third restriction orifice is stated to connect with second equalizing valve.
5. novel swing adsorption nitrogen producing apparatus according to claim 1-4, which is characterized in that the valve group is also
It include: third exhaust valve and the 4th exhaust valve, the third exhaust valve and the 4th exhaust valve are connected in parallel to each other；
The third exhaust valve is connected with the first row air valve and the second row air valve respectively, for that will pass through described first
The gas of exhaust valve and the second row air valve is discharged to the external world；
4th exhaust valve is connected with the first row air valve and the second row air valve respectively, for making first absorption
Tower is connected to by the first row air valve with the vacuum pump, make second adsorption tower pass through the second row air valve with it is described
Vacuum pump connection.
6. using the method for any one of the claim 1-5 novel swing adsorption nitrogen producing apparatus nitrogen, which is characterized in that including
Following steps:
Step (1): the air feeder is opened, gas is provided；
Step (2): opening first intake valve and first air outlet valve, adsorbs first adsorption tower；Described in opening
Second row air valve opens the vacuum pump, so that the second absorption tower pressure interior force is reduced to less than or equal to -0.85bar, makes institute
State the regeneration of the second adsorption tower；Close first intake valve, the first air outlet valve and second row air valve；
Step (3): the air feeder is opened, gas is provided；
Step (4): opening second intake valve and second air outlet valve, adsorbs second adsorption tower；Described in opening
First row air valve opens the vacuum pump, so that the first absorption tower pressure interior force is reduced to less than or equal to -0.85bar, makes institute
State the regeneration of the first adsorption tower；Close second intake valve, the second air outlet valve and the first row air valve；
Step (5): circuiting sequentially the step of carrying out step (1)~step (4) described in n times, and n is the integer more than or equal to 0.
7. the method for nitrogen processed according to claim 6, which is characterized in that after opening the second row air valve, open institute
It is further comprising the steps of before stating vacuum pump:
The third exhaust valve is opened, the 4th exhaust valve is closed, reduces the second absorption tower pressure interior force, described in closing
Third exhaust valve opens the 4th exhaust valve, is connected to second adsorption tower with the vacuum pump；And/or
It is further comprising the steps of before opening the vacuum pump after opening the first row air valve:
The third exhaust valve is opened, the 4th exhaust valve is closed, reduces the first absorption tower pressure interior force, described in closing
Third exhaust valve opens the 4th exhaust valve, is connected to first adsorption tower with the vacuum pump.
8. the method for nitrogen processed according to claim 6, which is characterized in that close first intake valve, the first air outlet valve
After the step of second row air valve, second intake valve and second air outlet valve are opened, adsorbs second adsorption tower
The step of before, it is further comprising the steps of:
First equalizing valve and second equalizing valve are opened, air pressure in first adsorption tower and second adsorption tower is made
Balance.
9. a kind of novel pressure varying adsorption nitrogen making system, which is characterized in that including the described in any item novel transformations of claim 1-5
Adsorption nitrogen making device and confined space, the air feeder of the novel swing adsorption nitrogen producing apparatus and going out for the confined space
Port connection, the nitrogen gas tank of the novel swing adsorption nitrogen producing apparatus are connected to the air inlet of the confined space.
10. novel pressure varying adsorption nitrogen making system according to claim 9, which is characterized in that further include third intake valve and
4th intake valve, the third intake valve is arranged between the air feeder and the gas outlet of the confined space, for controlling
Gas in the confined space enters the air feeder；
4th intake valve is in parallel with the third intake valve, enters the air feeder for controlling extraneous air.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110200189A (en) * | 2019-07-02 | 2019-09-06 | 池州山立分子筛有限公司 | Portable freshness-retaining device and preservation method |
| TWI782221B (en) * | 2019-08-02 | 2022-11-01 | 亞碩實業股份有限公司 | Nitrogen generator |
| CN117983021A (en) * | 2024-02-05 | 2024-05-07 | 双璞科技(佛山)有限公司 | Low-energy-consumption two-tower VPSA nitrogen production system and process thereof |
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| CN203737071U (en) * | 2014-03-24 | 2014-07-30 | 九江中科鑫星新材料有限公司 | Novel pressure swing adsorption device |
| CN204848274U (en) * | 2015-07-27 | 2015-12-09 | 大连力德气体分离技术有限公司 | System for high -purity nitrogen gas is got to two sections legal systems |
| CN209957385U (en) * | 2019-04-23 | 2020-01-17 | 池州山立分子筛有限公司 | Novel pressure swing adsorption nitrogen making device and nitrogen making system |
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| CN203737071U (en) * | 2014-03-24 | 2014-07-30 | 九江中科鑫星新材料有限公司 | Novel pressure swing adsorption device |
| CN204848274U (en) * | 2015-07-27 | 2015-12-09 | 大连力德气体分离技术有限公司 | System for high -purity nitrogen gas is got to two sections legal systems |
| CN209957385U (en) * | 2019-04-23 | 2020-01-17 | 池州山立分子筛有限公司 | Novel pressure swing adsorption nitrogen making device and nitrogen making system |
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| CN110200189A (en) * | 2019-07-02 | 2019-09-06 | 池州山立分子筛有限公司 | Portable freshness-retaining device and preservation method |
| TWI782221B (en) * | 2019-08-02 | 2022-11-01 | 亞碩實業股份有限公司 | Nitrogen generator |
| CN117983021A (en) * | 2024-02-05 | 2024-05-07 | 双璞科技(佛山)有限公司 | Low-energy-consumption two-tower VPSA nitrogen production system and process thereof |
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