CN206592546U - A kind of sealing system for the nitrogen pump that pressurizes - Google Patents
A kind of sealing system for the nitrogen pump that pressurizes Download PDFInfo
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- CN206592546U CN206592546U CN201720199627.3U CN201720199627U CN206592546U CN 206592546 U CN206592546 U CN 206592546U CN 201720199627 U CN201720199627 U CN 201720199627U CN 206592546 U CN206592546 U CN 206592546U
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- nitrogen
- pressurization
- pump
- storage tank
- air accumulator
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Abstract
The utility model discloses a kind of sealing system for the nitrogen pump that pressurizes, and it includes air separation unit, nitrogen storage tank, Nitrogen pipe network, air accumulator and more than one pressurization nitrogen pump；The liquid nitrogen outlet of air separation unit passes through pipeline communication with nitrogen storage tank；The gas outlet of each pressurization nitrogen pump passes through pipeline communication with air accumulator respectively；The labyrinth seal of air accumulator and pressurization nitrogen pump passes through pipeline communication；Control valve and pressure-reducing valve are set gradually on pipeline between the labyrinth seal of air accumulator to each pressurization nitrogen pump.Beneficial effect：Nitrogen in air accumulator after pressure-reducing valve is depressurized as pressurization nitrogen pump sealing nitrogen, be not susceptible to freeze in the labyrinth seal for the nitrogen pump that pressurizes, it is ensured that the normal operation of pressurization nitrogen pump, reduce the maintenance of clean-up cost to the nitrogen pump that pressurizes；Sealing nitrogen is flowed back into nitrogen storage tank from pipeline, does not interfere with the purity of liquid nitrogen in nitrogen storage tank, it is ensured that the quality of liquid nitrogen in nitrogen storage tank；The sealing system of pressurization nitrogen pump is simple in construction after transformation, easily realizes.
Description
Technical field：
The utility model is related to a kind of sealing system, more particularly to a kind of sealing system for the nitrogen pump that pressurizes.
Background technology：
The nitrogen that current air separation unit is extracted is conveyed by Nitrogen pipe network and air accumulator to nitrogen user, air separation unit
The liquid nitrogen extracted is then stored in nitrogen storage tank；When air separation unit go wrong can not give nitrogen user's supplying nitrogen when, open
It is nitrogen user's supplying nitrogen, operation that liquid nitrogen pressurization in nitrogen storage tank is continued through air accumulator and Nitrogen pipe network by dynamic pressurization nitrogen pump
In pressurization nitrogen pump need carry out air seal；Existing pressurization nitrogen pump is sealed by instrument air to it, but is used
Instrument air carries out sealing to nitrogen pump and there is problems with：1st, it there are moisture by the compressed instrument air of air compressor
Etc. other compositions, and then easily situation about freezing in the gas labyrinth seal for the nitrogen pump that causes to pressurize so that the nitrogen that pressurizes is pumped out
It can not now start, or the phenomenon of car is jumped after startup, improve the maintenance of clean-up number of times to the nitrogen pump that pressurizes, add maintenance of clean-up
Cost, and have impact on normally using for nitrogen user；2nd, during pressurization nitrogen pump stops, instrument air is leaked by the nitrogen pump that pressurizes
Enter in nitrogen storage tank, the quality of liquid nitrogen in the purity liquid nitrogen in nitrogen storage tank, influence nitrogen storage tank can be reduced after long-time.
Utility model content：
The purpose of this utility model is that offer is a kind of simple in construction, the low pressurization nitrogen pump of pressurization nitrogen pump maintenance of clean-up cost
Sealing system.
The utility model is implemented by following technical scheme：A kind of sealing system for the nitrogen pump that pressurizes, it includes air separation unit, nitrogen
Storage tank, Nitrogen pipe network, air accumulator, standby Nitrogen pipe network and more than one pressurization nitrogen pump；The liquid nitrogen outlet of the air separation unit
Pass through pipeline communication with the nitrogen storage tank；The inlet of each pressurization nitrogen pump is connected by pipeline with the nitrogen storage tank；Often
The gas outlet of the individual pressurization nitrogen pump is connected with the air accumulator by the standby Nitrogen pipe network respectively；In the standby nitrogen
Stop valve and check-valves are provided with pipe network；The nitrogen outlet of the air separation unit passes through the Nitrogen pipe network with the air accumulator
Connection；The gas labyrinth seal air inlet of the air accumulator and the pressurization nitrogen pump passes through pipeline communication；In the air accumulator extremely
Control valve and pressure-reducing valve are set gradually on pipeline between the gas labyrinth seal air inlet of each pressurization nitrogen pump.
Advantage of the present utility model：1st, the nitrogen in air accumulator after pressure-reducing valve is depressurized as pressurization nitrogen pump sealing nitrogen
Gas, when pressurizeing nitrogen pump operation, is not susceptible to freeze, it is ensured that pressurize the normal of nitrogen pump in the gas labyrinth seal for the nitrogen pump that pressurizes
Operation, reduces the maintenance of clean-up cost to the nitrogen pump that pressurizes；2nd, sealing nitrogen is flowed back into nitrogen storage tank from pipeline, is not interfered with
The purity of liquid nitrogen in nitrogen storage tank, it is ensured that the quality of liquid nitrogen in nitrogen storage tank；3rd, the sealing system structure letter of pressurization nitrogen pump after transforming
It is single, easily realize.
Brief description of the drawings：
Fig. 1 is overall structure diagram of the present utility model.
Air separation unit 1, nitrogen storage tank 2, pressurization nitrogen pump 3, Nitrogen pipe network 4, air accumulator 5, standby Nitrogen pipe network 6, stop valve 7,
Check-valves 8, nitrogen user 9, control valve 10, pressure-reducing valve 11.
Embodiment：
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.
As shown in figure 1, a kind of sealing system for the nitrogen pump that pressurizes, it includes air separation unit 1, nitrogen storage tank 2, Nitrogen pipe network 4, storage
Gas tank 5, standby Nitrogen pipe network 6 and two pressurization nitrogen pumps 3；The liquid nitrogen outlet of air separation unit 1 passes through pipeline communication with nitrogen storage tank 2；
The inlet of each pressurization nitrogen pump 3 is connected by pipeline with nitrogen storage tank 2；The gas outlet of each pressurization nitrogen pump 3 respectively with air accumulator 5
Connected by standby Nitrogen pipe network 6；Stop valve 7 and check-valves 8 are provided with standby Nitrogen pipe network 6, is disabled in pressurization nitrogen pump 3
Afterwards, stop valve 7 controls standby Nitrogen pipe network 6 to turn off, while check-valves 8 prevents nitrogen reflux in air accumulator 5 to pressurization nitrogen pump
3, damage pressurization nitrogen pump 3；The nitrogen outlet of air separation unit 1 is connected with air accumulator 5 by Nitrogen pipe network 4；Air accumulator 5 is used with nitrogen
Pass through pipeline communication between family 9；The gas labyrinth seal air inlet of air accumulator 5 and pressurization nitrogen pump 3 passes through pipeline communication；In gas storage
Control valve 10 and pressure-reducing valve 11 are set gradually on tank 5 to the pipeline between the gas labyrinth seal air inlet of each pressurization nitrogen pump 3,
The switch of the control sealing nitrogen of control valve 10；Two the using and the reserved of pressurization nitrogen pump 3.
Operation principle：When air separation unit 1 is normally run, the nitrogen that air separation unit 1 is extracted passes through the He of Nitrogen pipe network 4
Air accumulator 5 gives the supplying nitrogen of nitrogen user 9, while the storage nitrogen in air accumulator 5；It can not be transported when air separation unit 1 goes wrong
During row, stop valve 7 is opened, starts conventional pressurization nitrogen pump 3, the nitrogen after the liquid nitrogen pressurization in nitrogen storage tank 2 is passed through into air accumulator 5
The supplying nitrogen of nitrogen user 9 is continued as, control valve 10 is now opened, makes the nitrogen in air accumulator 5 after the decompression of pressure-reducing valve 11
Into in the gas labyrinth seal of conventional pressurization nitrogen pump 3, nitrogen-sealed is carried out to conventional pressurization nitrogen pump 3, pressurization nitrogen pump 3 is entered
The sealed nitrogen of row is finally discharged into air, and standby pressurization nitrogen pump can be started after conventional pressurization nitrogen pump 3 breaks down
3；After air separation unit 1 resumes operation, close conventional pressurization nitrogen pump 3 and stop valve 7, simultaneously close off control valve 10, stop to
Sealing nitrogen is provided in the gas labyrinth seal of conventional pressurization nitrogen pump 3；Using nitrogen-sealed pressurization nitrogen pump 3, pressurization nitrogen pump 3
It is not susceptible to freeze in gas labyrinth seal, it is ensured that the normal operation of pressurization nitrogen pump 3, reduces the maintenance to the nitrogen pump 3 that pressurizes
Disposal costs；Nitrogen is sealed simultaneously to flow back into nitrogen storage tank 2 from pressurization nitrogen pump 3, does not interfere with the pure of liquid nitrogen in nitrogen storage tank 2
Degree, it is ensured that the quality of liquid nitrogen in nitrogen storage tank 2.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (1)
1. a kind of sealing system for the nitrogen pump that pressurizes, it includes air separation unit, nitrogen storage tank, Nitrogen pipe network, air accumulator, standby nitrogen tube
Net and more than one pressurization nitrogen pump；The liquid nitrogen outlet of the air separation unit passes through pipeline communication with the nitrogen storage tank；Each institute
The inlet for stating pressurization nitrogen pump is connected by pipeline with the nitrogen storage tank；The gas outlet of each pressurization nitrogen pump respectively with it is described
Air accumulator is connected by the standby Nitrogen pipe network；Stop valve and check-valves are provided with the standby Nitrogen pipe network；It is described
The nitrogen outlet of air separation unit is connected with the air accumulator by the Nitrogen pipe network；Characterized in that, the air accumulator and institute
The gas labyrinth seal air inlet for stating pressurization nitrogen pump passes through pipeline communication；In the gas of the air accumulator to each pressurization nitrogen pump
Control valve and pressure-reducing valve are set gradually on pipeline between body labyrinth seal air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720199627.3U CN206592546U (en) | 2017-03-01 | 2017-03-01 | A kind of sealing system for the nitrogen pump that pressurizes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720199627.3U CN206592546U (en) | 2017-03-01 | 2017-03-01 | A kind of sealing system for the nitrogen pump that pressurizes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206592546U true CN206592546U (en) | 2017-10-27 |
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ID=60125835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720199627.3U Active CN206592546U (en) | 2017-03-01 | 2017-03-01 | A kind of sealing system for the nitrogen pump that pressurizes |
Country Status (1)
| Country | Link |
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| CN (1) | CN206592546U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954001A (en) * | 2018-07-24 | 2018-12-07 | 杭州杭氧股份有限公司 | A kind of zero gap air supply system of space division cluster to downstream process system |
-
2017
- 2017-03-01 CN CN201720199627.3U patent/CN206592546U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954001A (en) * | 2018-07-24 | 2018-12-07 | 杭州杭氧股份有限公司 | A kind of zero gap air supply system of space division cluster to downstream process system |
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