CN105318193A - Low-pressure nitrogen gas header pipe system and control method - Google Patents
Low-pressure nitrogen gas header pipe system and control method Download PDFInfo
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- CN105318193A CN105318193A CN201410374620.1A CN201410374620A CN105318193A CN 105318193 A CN105318193 A CN 105318193A CN 201410374620 A CN201410374620 A CN 201410374620A CN 105318193 A CN105318193 A CN 105318193A
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Abstract
The invention relates to a low-pressure nitrogen gas header pipe system. The low-pressure nitrogen gas header pipe system comprises at least three air separation apparatuses, a first main pipe and a second main pipe, wherein the first main pipe at least comprises a first sub-pipe, a second sub-pipe and a third sub-pipe; the first sub-pipe is connected with the first air separation apparatus; the second sub-pipe is connected with the second air separation apparatus; the third sub-pipe is connected with the third air separation apparatus; the first sub-pipe, the second sub-pipe and the third sub-pipe are connected with a nitrogen pressure machine through an inlet pipe respectively; the second main pipe at least comprises a fourth sub-pipe, a fifth sub-pipe and a sixth sub-pipe; the fifth sub-pipe is connected with the second sub-pipe through a first communication pipe; the sixth sub-pipe is connected with the third sub-pipe through a second communication pipe; the fourth sub-pipe is connected with the first air separation apparatus; the fifth sub-pipe and the sixth sub-pipe are connected with a nitrogen pressure machine through an inlet pipe respectively. The common utilization of any nitrogen pressure machine on a header pipe can be guaranteed when any air separation apparatus is operated.
Description
Technical field
The present invention relates to a kind of low-pressure nitrogen manifold system and controlling method.
Background technique
Low-pressure nitrogen (being called for short " low pressure nitrogen ") is produced by cryogenic rectification oxygenerator (being called for short " empty point "), then sends into low pressure nitrogen mother pipe; Medium pressure nitrogen press or elevated pressure nitrogen press (being called for short " nitrogen compressor ") suck low pressure nitrogen from female pipe, supercharging, be processed as medium pressure nitrogen or elevated pressure nitrogen after flow to user.According to the demand of user to nitrogen, divide the nitrogen compressor female pipe of the low pressure nitrogen of outlet configuring respective numbers and force feed ability at sky, namely the low pressure nitrogen aggregated capacity opened, stop dividing according to sky with force feed amount of nitrogen compressor regulates and controls.
Fig. 1 is the structural representation of prior art mesolow nitrogen header pipe system.As shown in Figure 1, in prior art, low pressure nitrogen mother pipe is independent separately, is not communicated with mutually.No. 6 skies divide 10 configuration, 1 medium pressure nitrogen press 407 (being called for short " No. 7 medium pressure nitrogens "); No. 7 skies divide 20 configuration, 1 medium pressure nitrogen press 409 (being called for short " No. 9 medium pressure nitrogens "), 2 elevated pressure nitrogen press 507,508 (being called for short " No. 7 elevated pressure nitrogen ", " No. 8 elevated pressure nitrogen "); No. 8 skies divide 30 configuration, 1 medium pressure nitrogen press 410 (being called for short " No. 10 medium pressure nitrogens "), 1 elevated pressure nitrogen press 509 (being called for short " No. 9 elevated pressure nitrogen ").Along with industry development, nitrogen demand rolls up, so, through transformation, being divided by 3 skies the female pipe 701,702,703 of respective low pressure nitrogen to be communicated with is a house steward 70, arranges node valve 61,62 between adjacent two empty points, thus makes empty point can mutually call with nitrogen compressor, namely the low pressure nitrogen aggregated capacity divided according to 3 skies and freely regulate and control each nitrogen compressor, overallly improves nitrogen force feed amount.
But there are the following problems in above-mentioned low-pressure nitrogen manifold system of the prior art:
1, house steward 70 is 1 pipeline, divides 10, No. 7 skies to divide 20, No. 8 skies to divide 30 order arrangements, be equipped with node valve 61,62 between adjacent two empty points by No. 6 skies; When some pipeline section, equipment have issue handling and needs closed node valve, adjacent tubular segments cannot conducting, and nitrogen compressor each other cannot freely call.Such as, after closing any node valve, cannot conducting when No. 6 skies divide 10 and No. 8 skies to divide 30 operation simultaneously, No. 7 medium pressure nitrogens 407 and No. 10 medium pressure nitrogens 410 cannot be public.
2, each nitrogen compressor and affiliated empty dispenser sleeve construction, opens, stops interlocking and still divide control by affiliated sky, as No. 7 skies divide 10 abnormal jump car time, interlocking can be touched by No. 9 medium pressure nitrogens 409, No. 7 elevated pressure nitrogen 507, No. 8 elevated pressure nitrogen 508 all stop jumpings.
3, when 2 and divide with overhead and run simultaneously, and when wherein car is jumped in more than 1 burst, jump car sky point nearside pipeline section pressure can instantaneous reduction, have little time by other empty point supplementary, thus cause nearside nitrogen compressor to jump car because suction pressure is low.
4, No. 6 skies divide 10 through transformation, and low pressure nitrogen is significantly increased production, and its nearside only 1 No. 7 medium pressure nitrogen 407, need by house steward's other nitrogen compressor force feed upper; When appearance is aforementioned 1,2, in 3 kind of situation any one, units increased in production cannot by smooth force feed.
5, after empty point of low pressure nitrogen volume increase, original nitrogen compressor is not enough to full dose force feed, then need newly-increased nitrogen compressor; But house steward's finite capacity, after nitrogen compressor density increases, when aforementioned 3rd kind of situation occurs, consequence is more serious.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of low-pressure nitrogen manifold system and controlling method, can arbitrarily empty point run time can ensure the public of any nitrogen compressor on house steward, even if when sky divides burst jumping car, also can to control fast, stable operation.
The low-pressure nitrogen manifold system that the present invention relates to, comprising:
Comprise first empty point, the second sky divides and at least three skies of the 3rd empty point divide, it produces low-pressure nitrogen, first female pipe, described first female pipe at least comprises the first son pipe in succession connected, second son pipe and the 3rd son pipe, first node valve is provided with between described first son pipe and described second sub-pipe, Section Point valve is provided with between described second son pipe and described 3rd sub-pipe, described first sub-pipe is sent pipeline by the first low pressure nitrogen and is connected with described first empty point, described second sub-pipe is sent pipeline by the second low pressure nitrogen and is connected with described second empty point, described 3rd sub-pipe is sent pipeline by the 3rd low pressure nitrogen and is connected with the described 3rd empty point, described first son pipe, second son pipe is connected with nitrogen compressor respectively by inlet duct with the 3rd sub-pipe,
Second female pipe, described second female pipe at least comprises the 4th son pipe, 5th son pipe and the 6th son pipe, the 3rd node valve is provided with between described 4th son pipe and described 5th sub-pipe, the 4th node valve is provided with between described 5th son pipe and described 6th sub-pipe, described 5th sub-pipe was connected with described second sub-pipe by the first connecting tube, described 6th sub-pipe was connected with described 3rd sub-pipe by the second connecting tube, described 4th sub-pipe is sent pipeline by the 4th low pressure nitrogen and is connected with described first empty point, described 5th son pipe is connected with nitrogen compressor respectively by inlet duct with described 6th sub-pipe.
Preferably, also comprise the multiple blowing cleaners being arranged at each sub-pipe two ends, whether qualified for the low pressure nitrogen purity purging to detect in each sub-pipe to each sub-pipe.
Preferably, described blowing cleaner comprises scavenging conduit, is arranged on the blow down valve on scavenging conduit and analytical sampling valve.
Preferably, one end not arranging node valve of described first son pipe, the 3rd son pipe, the 4th son pipe and/or the 6th sub-pipe is provided with blind plate.
Preferably, the two ends of described first son pipe, the 3rd son pipe, the 4th son pipe and/or the 6th sub-pipe are provided with node valve.
In addition, the invention still further relates to a kind of controlling method based on above-mentioned low-pressure nitrogen manifold system, this controlling method comprises:
Described first node valve, Section Point valve, the 3rd node valve and the 4th node valve are closed, starts blowing cleaner and purge to detect the low pressure nitrogen purity in each sub-pipe to each sub-pipe;
For any node valve in described first node valve, Section Point valve, the 3rd node valve and the 4th node valve, open this node valve when low pressure nitrogen purity is all eligible in the sub-pipe detecting these node valve both sides; According to predetermined aggregated capacity, isolated operation or one or more sky of combined running divide and nitrogen compressor;
Close corresponding node valve as required, realize connection or the partition of each sky point low pressure nitrogen.
Described isolated operation or combined running one or more empty point and nitrogen compressor comprise:
When only needing to run the empty timesharing of separate unit, then run the nitrogen compressor be connected on same sub-pipe with this sky point;
When the empty timesharing of combined running multiple stage, preferential operation divides with the sky run the nitrogen compressor be connected on same sub-pipe, secondary and select to run the nitrogen compressor be connected on other sub-pipes.
Preferably, also comprise:
When wherein a sky divides jumping car, or this sky divides unloading, then unload the nitrogen compressor with this empty dispenser sleeve but do not jump car, does not unload and does not also jump car, and stop one or more nitrogen compressor according to user instruction to other nitrogen compressor.
Preferably, also comprise:
For arbitrary nitrogen compressor, when itself fault jumps the action of car interlocking, then it directly jumps car, and starts other equivalent nitrogen compressor according to user instruction.
Preferably, also comprise:
For arbitrary nitrogen compressor, when its suction pressure is low, then send unloading after reporting to the police, but do not jump car, continue to run well after female pipe Recovery and rebuild; When this nitrogen compressor suction pressure is too low, then directly jump car.
Use low-pressure nitrogen manifold system of the present invention and controlling method, can arbitrarily empty point run time can ensure the public of any nitrogen compressor on house steward, even if when sky divides burst jumping car, also can to control fast, stable operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art mesolow nitrogen header pipe system;
Fig. 2 is the structural representation of low-pressure nitrogen manifold system involved in the present invention;
Fig. 3 is the structural representation of blowing cleaner S in Fig. 2.
Embodiment
Following connection with figures 2 pairs of the specific embodiment of the present invention are described.Fig. 2 is the structural representation of low-pressure nitrogen manifold system involved in the present invention, and as shown in the figure, first female pipe 70 is divided into the first sub-pipe 702 of sub-pipe 701, second and the 3rd sub-pipe 703, and the two ends of first female pipe 70 are provided with blind plate 711 and 712.Be provided with between the sub-pipe 702 of first node valve 61, second and the 3rd sub-pipe 703 between first sub-pipe 701 and the second sub-pipe 702 and be provided with Section Point valve 62.When needs are to first female pipe 70 dilatation, in order to connect more empty point and son pipe, blind plate 711 and/or 712 can be replaced with node valve.Send pipeline 101 by the first low pressure nitrogen and be connected with the first sub-pipe 701 for first empty point 10; Send pipeline 201 by the second low pressure nitrogen and be connected with the second sub-pipe 702 for second empty point 20; Send pipeline 301 by the 3rd low pressure nitrogen and be connected with the 3rd sub-pipe 703 for 3rd empty point 30.
First nitrogen compressor 407 is connected with the first sub-pipe 711 by the first inlet duct 4071, and the first nitrogen compressor 407 is medium pressure nitrogen press.Second nitrogen compressor 409 is connected with the second sub-pipe 702 by the second inlet duct 4091,3rd nitrogen compressor 507 is connected with the second sub-pipe 702 by the 3rd inlet duct 5071,4th nitrogen compressor 508 is connected with the second sub-pipe 702 by the 4th inlet duct 5081, wherein the second nitrogen compressor 409 is medium pressure nitrogen press, and the 3rd nitrogen compressor 507, the 4th nitrogen compressor 508 are elevated pressure nitrogen press.5th nitrogen compressor 410 is connected with the 3rd sub-pipe 703 by the 5th inlet duct 4101, and the 6th nitrogen compressor 509 is connected with the 3rd sub-pipe 703 by the 6th inlet duct 5091.Wherein the 5th nitrogen compressor 410 is medium pressure nitrogen press, and the 6th nitrogen compressor 509 is elevated pressure nitrogen press.
Second female pipe 80 is divided into the 4th sub-pipe 801, the 5th sub-pipe 802 and the 6th sub-pipe 803, is respectively arranged with blind pipe 812 and blind plate 811 at the two ends of second female pipe 80.Be provided with between 4th sub-pipe 801 and the 5th sub-pipe 802 between the sub-pipe 802 of the 3rd node valve the 63, five and the 6th sub-pipe 803 and be provided with the 4th node valve 64.When needs are to second female pipe 80 dilatation, in order to connect more empty point and son pipe, blind plate 811 and/or 812 can be replaced with node valve.5th sub-pipe 802 is connected with the 7th nitrogen compressor 408 by the 7th inlet duct 4081, and the 7th nitrogen compressor 408 is medium pressure nitrogen press.6th son pipe logical 803 is crossed the 8th inlet duct 4111 and is connected with the 8th nitrogen compressor 411, and the 8th nitrogen compressor 411 is medium pressure nitrogen press.
In addition, the annexation of first female pipe 70 and second female pipe 80 is as follows.
5th sub-pipe 802 was connected with the second sub-pipe 702 by the first connecting tube 804, and the 6th sub-pipe 803 was connected with the 3rd sub-pipe 703 by the second connecting tube 805; 4th sub-pipe 801 is sent pipe 103 by the 4th low pressure nitrogen and is connected with described first empty point 10.
Blowing cleaner is also installed for purging each sub-pipe and detecting the nitrogen gas purity in each sub-pipe in the present embodiment.Fig. 3 is the structural representation of blowing cleaner S, and blowing cleaner S comprises scavenging conduit 721 and the blow down valve 722 that is arranged on scavenging conduit 721 and analytical sampling valve 723.In present embodiment, on first female pipe 70, near blind plate 712, the two ends of Section Point valve 62, the two ends of first node valve 61 and blind plate 711 be nearby respectively arranged with scavenging conduit S, on second female pipe 80, near blind plate 812, the two ends of the 3rd node valve 63 and the two ends of the 4th node valve 64 and blind plate 811 be nearby respectively arranged with scavenging conduit S.
The present embodiment also provides a kind of controlling method based on above-mentioned low-pressure nitrogen manifold system.
First, successively closed node valve, and the blow down valve antithetical phrase pipe opening the blowing cleaner on corresponding sub-pipe purges, then detected the purity of low pressure nitrogen by sampling analysis valve, treat that the low pressure nitrogen purity in the sub-pipe of these node valve both sides opens this node valve all after the assay was approved again.Such as first first node valve 61 cuts out, open the blowing cleaner S be arranged on the first sub-pipe 701 and the second sub-pipe 702 respectively and carry out purging and the detection of purity to low pressure nitrogen, until nitrogen gas purity in the first and second son pipes be all detected as qualified after open first node valve 61.
Treat that all node valves opened after the assay was approved by all sub-pipes, first female pipe 70 and second female pipe 80 are by each son pipe and be communicated with connecting tube, achieve all nitrogen compressors public, can supply combination in any, call.
For low-pressure nitrogen manifold system of the present invention, can according to user's request amount Σ Q
x, setting low pressure nitrogen aggregated capacity Σ Q
dthe two is made to reach balance.
Concrete, user's request amount Σ Q
x=medium pressure nitrogen total force feed amount Σ Q
z+ elevated pressure nitrogen total force feed amount Σ Q
g.
Medium pressure nitrogen total force feed amount Σ Q
zthe force feed amount Q of the=the first nitrogen compressor 407
407+ the second nitrogen compressor 409 force feed amount Q
409+ the five nitrogen compressor 410 force feed amount Q
410+ the seven nitrogen compressor 408 force feed amount Q
408+ the eight nitrogen compressor 411 force feed amount Q
411.
Elevated pressure nitrogen total force feed amount Σ Q
g=the three nitrogen compressor 507 force feed amount Q
507+ the four nitrogen compressor 508 force feed amount Q
508+ the six nitrogen compressor 509 force feed amount Q
509.
Low pressure nitrogen aggregated capacity Σ Q
dthe low pressure nitrogen sendout Q of=the first empty point 10
101the low pressure nitrogen sendout Q of+the second empty point 20
201the low pressure nitrogen sendout Q of+the three empty point 10
301.
Thus realize Σ Q
x=Σ Q
d.
Under regard to multiple stage sky point and combinationally using of nitrogen compressor be described.
Only need operation 1 empty timesharing, then run the nitrogen compressor being connected to same sub-pipe; If when such as running first empty point 10, preferentially operation is positioned at the first nitrogen compressor 407 on same sub-pipe 701 with first empty point 10, and therefore when the first sky divides 10 to jump car or unloading, the first nitrogen compressor 407 jumps car.
When multiple stage sky point runs simultaneously, preferential operation and the empty point of nitrogen compressor be connected on same sub-pipe, select other nitrogen compressors of operation and then.
When wherein 1 sky divides jumping car, or this sky divides unloading, then this empty dispenser sleeve nitrogen compressor unloads but do not jump car, and other nitrogen compressor does not unload and do not jump car yet, by artificial regulatory, determines to stop which platform or which platform nitrogen compressor;
Arbitrary nitrogen compressor, when itself fault jumps the action of car interlocking, then it directly jumps car, by manually opening other equivalent nitrogen compressor; If its suction pressure is low, then first send warning, then unload, but do not jump car, after artificial regulatory, recovery main-piping pressure, then it continues to run well; If its suction pressure is too low, then directly jump car.
Below closed node valve is as required described with the connection or partition that realize each sky point low pressure nitrogen.
Concrete, when closing first node valve 61, the first sub-pipe 701 and the second sub-pipe 702 are isolated, and send pipeline 101 and are only connected with the first nitrogen compressor 407 for first empty point 10 by the first low pressure nitrogen.
When closing the 3rd node valve 63, the 4th sub-pipe 801 and the 5th sub-pipe 802 are isolated, then send pipeline 103 by the 4th low pressure nitrogen for first empty point 10 and do not connect any nitrogen compressor.
When closing Section Point valve 62, the second sub-pipe 702 and the 3rd sub-pipe 703 are isolated, but are still communicated with the 3rd sub-pipe 703 by the first connecting tube connecting tube 804, second 805 and the sub-pipe 702 of second female pipe 80, second.
When in like manner closing the 4th node valve 64, the 5th sub-pipe 802 and the 6th sub-pipe 803 are isolated, but are still communicated with the 6th sub-pipe 803 by the first connecting tube connecting tube 804, second 805 and the sub-pipe 802 of first female pipe the 70, five.
When first node valve 61 and the 3rd node valve 63 are all closed, isolate with manifold system for first empty point 10.
When Section Point valve 62 and the 4th node valve 64 are all closed, isolate with manifold system for the 3rd empty point 30.
When all node valves are all closed, each sky divides and can only support the use with the nitrogen compressor be connected on same sub-pipe, can not call mutually.
Use low-pressure nitrogen manifold system of the present invention and controlling method, can arbitrarily empty point run time can ensure the public of any nitrogen compressor on house steward, the nitrogen demand of client can be met, calling mutually of empty point of realization, also can realize the empty relative isolation with nitrogen compressor that divides.Even if in addition when sky divides burst to jump car, also can to control fast, stable operation, to achieve good control.
Protection scope of the present invention is not limited to the content of above-described embodiment, can have various deformation when not departing from claim.
Claims (10)
1. a low-pressure nitrogen manifold system, comprising:
Comprise first empty point, the second sky divides and at least three skies of the 3rd empty point divide, it produces low-pressure nitrogen, first female pipe, described first female pipe at least comprises the first son pipe in succession connected, second son pipe and the 3rd son pipe, first node valve is provided with between described first son pipe and described second sub-pipe, Section Point valve is provided with between described second son pipe and described 3rd sub-pipe, described first sub-pipe is sent pipeline by the first low pressure nitrogen and is connected with described first empty point, described second sub-pipe is sent pipeline by the second low pressure nitrogen and is connected with described second empty point, described 3rd sub-pipe is sent pipeline by the 3rd low pressure nitrogen and is connected with the described 3rd empty point, described first son pipe, second son pipe is connected with nitrogen compressor respectively by inlet duct with the 3rd sub-pipe,
It is characterized in that, described low-pressure nitrogen manifold system also comprises:
Second female pipe, described second female pipe at least comprises the 4th son pipe, 5th son pipe and the 6th son pipe, the 3rd node valve is provided with between described 4th son pipe and described 5th sub-pipe, the 4th node valve is provided with between described 5th son pipe and described 6th sub-pipe, described 5th sub-pipe was connected with described second sub-pipe by the first connecting tube, described 6th sub-pipe was connected with described 3rd sub-pipe by the second connecting tube, described 4th sub-pipe is sent pipeline by the 4th low pressure nitrogen and is connected with described first empty point, described 5th son pipe is connected with nitrogen compressor respectively by inlet duct with described 6th sub-pipe.
2. whether low-pressure nitrogen manifold system as claimed in claim 1, is characterized in that, also comprise the multiple blowing cleaners being arranged at each sub-pipe two ends, qualified for the low pressure nitrogen purity purging to detect in each sub-pipe to each sub-pipe.
3. low-pressure nitrogen manifold system as claimed in claim 2, it is characterized in that, described blowing cleaner comprises scavenging conduit, is arranged on the blow down valve on scavenging conduit and analytical sampling valve.
4. low-pressure nitrogen manifold system as claimed in claim 1, is characterized in that, one end not arranging node valve of described first son pipe, the 3rd son pipe, the 4th son pipe and/or the 6th sub-pipe is provided with blind plate.
5. low-pressure nitrogen manifold system as claimed in claim 1, is characterized in that, the two ends of described first son pipe, the 3rd son pipe, the 4th son pipe and/or the 6th sub-pipe are provided with node valve.
6. based on a controlling method for the low-pressure nitrogen manifold system such as according to any one of claim 2 ~ 5, it is characterized in that, this controlling method comprises:
Described first node valve, Section Point valve, the 3rd node valve and the 4th node valve are closed, starts blowing cleaner and purge to detect the low pressure nitrogen purity in each sub-pipe to each sub-pipe;
For any node valve in described first node valve, Section Point valve, the 3rd node valve and the 4th node valve, open this node valve when low pressure nitrogen purity is all eligible in the sub-pipe detecting these node valve both sides; According to predetermined aggregated capacity, isolated operation or one or more sky of combined running divide and nitrogen compressor;
Close corresponding node valve as required, realize connection or the partition of each sky point low pressure nitrogen.
7. the controlling method of low-pressure nitrogen manifold system as claimed in claim 6, is characterized in that, described isolated operation or combined running one or more empty point and nitrogen compressor comprise:
When only needing to run the empty timesharing of separate unit, then run the nitrogen compressor be connected on same sub-pipe with this sky point;
When the empty timesharing of combined running multiple stage, preferential operation divides with the sky run the nitrogen compressor be connected on same sub-pipe, secondary and select to run the nitrogen compressor be connected on other sub-pipes.
8. the controlling method of low-pressure nitrogen manifold system as claimed in claim 6, is characterized in that, also comprise:
When wherein a sky divides jumping car, or this sky divides unloading, then unload the nitrogen compressor with this empty dispenser sleeve but do not jump car, does not unload and does not also jump car, and stop one or more nitrogen compressor according to user instruction to other nitrogen compressor.
9. the controlling method of low-pressure nitrogen manifold system as claimed in claim 6, is characterized in that, also comprise:
For arbitrary nitrogen compressor, when itself fault jumps the action of car interlocking, then it directly jumps car, and starts other equivalent nitrogen compressor according to user instruction.
10. the controlling method of low-pressure nitrogen manifold system as claimed in claim 6, is characterized in that, also comprise:
For arbitrary nitrogen compressor, when its suction pressure is low, then send unloading after reporting to the police, but do not jump car, continue to run well after female pipe Recovery and rebuild; When this nitrogen compressor suction pressure is too low, then directly jump car.
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| CN201410374620.1A CN105318193B (en) | 2014-07-31 | 2014-07-31 | A kind of low-pressure nitrogen manifold system and control method |
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| CN201410374620.1A CN105318193B (en) | 2014-07-31 | 2014-07-31 | A kind of low-pressure nitrogen manifold system and control method |
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| CN117662445A (en) * | 2024-01-30 | 2024-03-08 | 玉得气体有限责任公司 | Nitrogen compressor operation control method and system |
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| Publication number | Publication date |
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| CN105318193B (en) | 2018-01-30 |
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