CN108087721A - A kind of nitrogen recycling system and its recovery method - Google Patents
A kind of nitrogen recycling system and its recovery method Download PDFInfo
- Publication number
- CN108087721A CN108087721A CN201711144828.4A CN201711144828A CN108087721A CN 108087721 A CN108087721 A CN 108087721A CN 201711144828 A CN201711144828 A CN 201711144828A CN 108087721 A CN108087721 A CN 108087721A
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- CN
- China
- Prior art keywords
- nitrogen
- spot
- valve
- low temperature
- drainage valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/014—Nitrogen
Abstract
The invention discloses a kind of nitrogen recycling system and its recovery methods, wherein, the system comprises for storing the liquid nitrogen container of liquid nitrogen, the liquid nitrogen container is connected with the first Drainage valve on the spot, by described first on the spot Drainage valve low temperature nitrogen is discharged on the spot, the first delivery pipe is connected after the Drainage valve on the spot, it is connected by first delivery pipe with vaporizer, displacement valve is installed in the first delivery pipe, the flow direction of low temperature nitrogen is controlled by replacing valve, pass through scheme of the present invention, flashed vapour in liquid nitrogen system can be recycled, it recycles, not only reduce cost, energy conservation and environmental protection simultaneously.
Description
Technical field
The present invention relates to nitrogen recycling field more particularly to a kind of nitrogen recycling system and its recovery methods.
Background technology
Nitrogen system supplies for PSA nitrogen gas generating systems and liquid nitrogen gasification dual gas supply, to ensure each vessel isolation gas in plant stand, put
Change the normal supply of purge gass and instrument wind urgent stand-by gas source.Common low temperature liquid nitrogen tank and mating vaporizer system
It is installed for live two parts, so can not realize the workflow reengineering in producer.Under normal conditions, most users in order to
Convenient, often the scene of carrying out directly is released, and does not consider recycling.
Therefore, the prior art has yet to be improved and developed.
The content of the invention
In view of above-mentioned deficiencies of the prior art, it is an object of the invention to provide a kind of nitrogen recycling system and its recycling sides
Method, it is intended to solve the problem of that nitrogen recycling recycles.
Technical scheme is as follows：
A kind of nitrogen recycling system, wherein, the liquid nitrogen container including being used to store liquid nitrogen, the liquid nitrogen container is connected with first just
Ground Drainage valve, by described first on the spot Drainage valve low temperature nitrogen is discharged on the spot, connect after the Drainage valve on the spot
The first delivery pipe is connect, is connected by first delivery pipe with vaporizer, displacement valve in the first delivery pipe is installed, is passed through
Replace the flow direction of valve control low temperature nitrogen.
The nitrogen recycling system, wherein, the vaporizer is also associated with the second delivery pipe, second delivery pipe one
End is connected with vaporizer, and the other end is connected with liquid nitrogen container bottom, and welding is equipped in second delivery pipe and liquid nitrogen container junction
Valve welds valve by opening, and normal liquid nitrogen in liquid nitrogen container is made to be delivered to vaporizer gasification.
The nitrogen recycling system, wherein, the delivery pipe includes straight tube and bend pipe, is matched somebody with somebody by straight tube and bend pipe
It closes, increases the length of low temperature nitrogen conveyance conduit.
The nitrogen recycling system, wherein, the straight tube passes through flanged joint with bend pipe.
The nitrogen recycling system, wherein, the end of the straight tube is additionally provided with the second Drainage valve on the spot, by described
Second on the spot Drainage valve control discharge low temperature nitrogen.
The nitrogen recycling system, wherein, the flange is steel flange.
The nitrogen recycling system, wherein, described first on the spot Drainage valve be arranged at the bottom end outlet of liquid nitrogen container.
A kind of nitrogen recycling method, wherein, including step：
A, open the first Drainage valve on the spot, low temperature nitrogen from first on the spot Drainage valve discharge；
B, displacement valve is opened, low temperature nitrogen is delivered to vaporizer by delivery pipe and is vaporized；
C, displacement valve is closed, the second Drainage valve on the spot is opened, extra low temperature nitrogen is discharged on the spot.
Advantageous effect：The invention discloses a kind of nitrogen recycling system and its recovery method, wherein, the system comprises with
In the liquid nitrogen container of storage liquid nitrogen, the liquid nitrogen container is connected with the first Drainage valve on the spot, passes through the described first Drainage valve on the spot
Low temperature nitrogen is discharged on the spot, the first delivery pipe is connected after the Drainage valve on the spot, passes through first delivery pipe and vapour
Change device connection, displacement valve is installed in the first delivery pipe, the flow direction of low temperature nitrogen is controlled by replacing valve, by this hair
The bright scheme can recycle the flashed vapour in liquid nitrogen system, recycle, not only reduce cost, while energy-saving ring
It protects.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the structure diagram of nitrogen recycling system of the present invention.
Fig. 2 is the step flow chart of nitrogen recycling method of the present invention.
Specific embodiment
The present invention provides a kind of nitrogen recycling system and its recovery method, to make the purpose of the present invention, technical solution and effect
Fruit is clearer, clear and definite, and the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only
Only to explain the present invention, it is not intended to limit the present invention.
Referring to Fig. 1, being the structure diagram of nitrogen recycling system of the present invention, the invention discloses a kind of nitrogen to return
Receipts system, wherein, the liquid nitrogen container 101 including being used to store liquid nitrogen, the liquid nitrogen container 101 is connected with the first Drainage valve on the spot
102, by described first on the spot Drainage valve 102 low temperature nitrogen is discharged on the spot, connected after the Drainage valve on the spot 102
First delivery pipe 103 is connected by first delivery pipe 103 with vaporizer 104, is equipped with and is put in the first delivery pipe 103
Valve 105 is changed, the flow direction of low temperature nitrogen is controlled by replacing valve 105.
In the prior art, low temperature liquid nitrogen long-time storage is in liquid nitrogen container, can generate flashed vapour, after certain interval of time,
Liquid nitrogen pressure tank can rise, and each pressure vessel has its design pressure and the setting of safety valve jumping up pressure, it is common practice that
When pressure rises to highest permission operating pressure, scene carries out the live side being vented on the spot using Drainage valve on the spot is opened
Method carries out pressure release to tank body, and by tank body pressure releasing to routine operating pressure, and the low temperature nitrogen released out belongs to indifferent gas
Body, human contact has the possibility of frostbite during releasing, and density is discharged, tank body periphery can be gathered for a long time close to air
A large amount of inert gases once human body largely sucks, can also result in anoxia asphyxia etc..
It is excessive for pressure in the liquid nitrogen container of the prior art the invention discloses a kind of nitrogen recycling system, directly to sky
Discharge low temperature nitrogen makes improvement, can be recycled, nitrogen recycling system of the present invention, specifically including liquid
Nitrogen tank, liquid nitrogen container are equipped with the first Drainage valve on the spot, in the prior art, directly by first on the spot Drainage valve idle discharge is put,
The present invention, described first on the spot Drainage valve be connected with the first delivery pipe, liquid nitrogen is delivered to by vaporizer by the first delivery pipe,
Liquid nitrogen is vaporized by vaporizer, the nitrogen after vaporization can be used as other purposes, be recycled, defeated by first
The displacement valve on pipe is sent, can control the flow direction of low temperature nitrogen, opens the first Drainage valve, and open displacement valve on the spot, it is low
Warm nitrogen can be delivered to vaporizer out of liquid nitrogen container.
Further, the nitrogen recycling system, wherein, the vaporizer 104 is also associated with the second delivery pipe 106,
Described second delivery pipe one end is connected with vaporizer, and the other end is connected with liquid nitrogen container bottom, in second delivery pipe and liquid nitrogen
Tank junction is equipped with welding valve 110, and valve is welded by opening, and normal liquid nitrogen in liquid nitrogen container is made to be delivered to vaporizer gasification.
Nitrogen recycling system of the present invention, under normal condition, liquid nitrogen container is directly conveyed liquid nitrogen by the second delivery pipe
Gasify to vaporizer, and when pressure liquid nitrogen pressure inside the tank is excessive, close welding valve, open the first Drainage valve on the spot, put
Valve is changed, low temperature nitrogen is exported from vaporizer to nitrogen buffer tank, is exported by Nitrogen pipe network.The welding valve cannot be with
First on the spot Drainage valve and displacement valve open simultaneously, that is, weld valve opening when, the first Drainage valve and displacement on the spot
Valve close, first on the spot Drainage valve and displacement valve opening when, it is described welding valve be necessary for closing.
Further, the nitrogen recycling system, wherein, the delivery pipe 106 includes straight tube and bend pipe, by straight
Pipe and elbow fittings increase the length of low temperature nitrogen conveyance conduit.
Nitrogen recycling system of the present invention, preferably described delivery pipe include straight tube and bend pipe, can be according to different skies
Between landform, to change the direction of pipeline, improve adaptability.
Further, the nitrogen recycling system, wherein, the straight tube is connected with bend pipe by flange 107.
Nitrogen recycling system of the present invention, preferably described straight tube are attached with bend pipe by flange, at straight tube end
Mounting flange is held, bend pipe is installed by companion flange.
Further, the nitrogen recycling system, wherein, the end of the straight tube is additionally provided with the second Drainage valve on the spot
108, by described second on the spot Drainage valve 108 control discharge low temperature nitrogen.
Nitrogen recycling system of the present invention, to extra low temperature nitrogen, it is still desirable to be put to idle discharge, therefore, in straight tube
End preferably also set up the second Drainage valve on the spot, extra low temperature nitrogen can pass through the second Drainage valve control row on the spot
Go out.
Further, the nitrogen recycling system, wherein, the flange 107 is steel flange.
Nitrogen recycling system of the present invention, since what is circulated in pipeline is low temperature nitrogen, in order to ensure the stabilization of system
Property, the flange is preferably steel flange.
Further, the nitrogen recycling system, wherein, described first on the spot Drainage valve 102 be arranged on liquid nitrogen container
At 101 bottom end outlet.
Nitrogen recycling system of the present invention, described first on the spot Drainage valve be preferably provided at the bottom end outlet of liquid nitrogen container
Place facilitates the outflow of control low temperature nitrogen, excessive low temperature nitrogen is avoided to accumulate in pipeline.
System of the present invention, the flow direction of low temperature nitrogen is 102-103-105-104- nitrogen buffer tanks, then passes through institute
It states nitrogen buffer tank and is delivered to Nitrogen pipe network, after low temperature nitrogen (flashed vapour) is recycled, liquid nitrogen container pressure reduces normal operating pressure
It after power, closes 102,105. and opens 108, exclude to remain in the low temperature nitrogen in 103.
Further, the invention also discloses a kind of nitrogen recycling method, as shown in Fig. 2, being flowed for the step of the method
Cheng Tu, wherein, including step：
S1, open the first Drainage valve on the spot, low temperature nitrogen from first on the spot Drainage valve discharge；
S2, displacement valve is opened, low temperature nitrogen is delivered to vaporizer by delivery pipe and is vaporized；
S3, displacement valve is closed, opens the second Drainage valve on the spot, extra low temperature nitrogen is discharged on the spot.
The specific implementation of the method for the invention has been described in systems, therefore does not repeat herein.
In conclusion the invention discloses a kind of nitrogen recycling system and its recovery method, wherein, the system comprises with
In the liquid nitrogen container of storage liquid nitrogen, the liquid nitrogen container is connected with the first Drainage valve on the spot, passes through the described first Drainage valve on the spot
Low temperature nitrogen is discharged on the spot, the first delivery pipe is connected after the Drainage valve on the spot, passes through first delivery pipe and vapour
Change device connection, displacement valve is installed in the first delivery pipe, the flow direction of low temperature nitrogen is controlled by replacing valve, by this hair
The bright scheme can recycle the flashed vapour in liquid nitrogen system, recycle, not only reduce cost, while energy-saving ring
It protects.
It should be appreciated that the application of the present invention is not limited to the above, it for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (8)
1. a kind of nitrogen recycling system, which is characterized in that the liquid nitrogen container including being used to store liquid nitrogen, the liquid nitrogen container are connected with
One Drainage valve on the spot, by described first on the spot Drainage valve low temperature nitrogen is discharged on the spot, in the Drainage valve on the spot
After connect the first delivery pipe, be connected by first delivery pipe with vaporizer, displacement valve be installed in the first delivery pipe,
The flow direction of low temperature nitrogen is controlled by replacing valve.
2. nitrogen recycling system according to claim 1, which is characterized in that the vaporizer is also associated with the second conveying
Pipe, described second delivery pipe one end are connected with vaporizer, and the other end is connected with liquid nitrogen container bottom, in second delivery pipe and liquid
Nitrogen tank junction is equipped with welding valve, and valve is welded by opening, and normal liquid nitrogen in liquid nitrogen container is made to be delivered to vaporizer gasification.
3. nitrogen recycling system according to claim 1, which is characterized in that the delivery pipe includes straight tube and bend pipe,
Pass through straight tube and elbow fittings, the length of increase low temperature nitrogen conveyance conduit.
4. nitrogen recycling system according to claim 3, which is characterized in that the straight tube passes through flanged joint with bend pipe.
5. nitrogen recycling system according to claim 1, which is characterized in that the end of the straight tube is additionally provided with second on the spot
Drainage valve, by described second on the spot Drainage valve control discharge low temperature nitrogen.
6. nitrogen recycling system according to claim 4, which is characterized in that the flange is steel flange.
7. nitrogen recycling system according to claim 1, which is characterized in that described first on the spot Drainage valve be arranged on liquid
At the bottom end outlet of nitrogen tank.
A kind of 8. nitrogen recycling method, which is characterized in that including step：
A, open the first Drainage valve on the spot, low temperature nitrogen from first on the spot Drainage valve discharge；
B, displacement valve is opened, low temperature nitrogen is delivered to vaporizer by delivery pipe and is vaporized；
C, displacement valve is closed, the second Drainage valve on the spot is opened, extra low temperature nitrogen is discharged on the spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144828.4A CN108087721A (en) | 2017-11-17 | 2017-11-17 | A kind of nitrogen recycling system and its recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144828.4A CN108087721A (en) | 2017-11-17 | 2017-11-17 | A kind of nitrogen recycling system and its recovery method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108087721A true CN108087721A (en) | 2018-05-29 |
Family
ID=62172215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711144828.4A Pending CN108087721A (en) | 2017-11-17 | 2017-11-17 | A kind of nitrogen recycling system and its recovery method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108087721A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109481003A (en) * | 2018-12-29 | 2019-03-19 | 天津美电医疗科技有限公司 | A kind of low temperature nitrogen Cryoablation system |
| CN111803831A (en) * | 2020-07-23 | 2020-10-23 | 中国矿业大学 | Fire prevention and control system and control method for lithium ion battery prefabricated cabin |
| CN111998225A (en) * | 2020-07-07 | 2020-11-27 | 金华职业技术学院 | High-temperature nitrogen recovery system and control method thereof |
| CN112815229A (en) * | 2021-01-14 | 2021-05-18 | 深圳市燃气集团股份有限公司 | Liquid natural gas unloading method and device |
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| EP1451513A1 (en) * | 2001-10-10 | 2004-09-01 | Igor K. Kotliar | Mobile system with breathable fire extinguishing compositions |
| CN202725600U (en) * | 2012-08-07 | 2013-02-13 | 南京钢铁股份有限公司 | Low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit |
| CN104406039A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Improved recycling system and technology for emptying nitrogen from liquid nitrogen tank |
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2017
- 2017-11-17 CN CN201711144828.4A patent/CN108087721A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3707849A (en) * | 1969-03-07 | 1973-01-02 | Linde Ag | Fractionation of air by using refrigeration from open cycle evaporation of external cryogenic liquid |
| EP1451513A1 (en) * | 2001-10-10 | 2004-09-01 | Igor K. Kotliar | Mobile system with breathable fire extinguishing compositions |
| CN202725600U (en) * | 2012-08-07 | 2013-02-13 | 南京钢铁股份有限公司 | Low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit |
| CN104406039A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Improved recycling system and technology for emptying nitrogen from liquid nitrogen tank |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109481003A (en) * | 2018-12-29 | 2019-03-19 | 天津美电医疗科技有限公司 | A kind of low temperature nitrogen Cryoablation system |
| CN111998225A (en) * | 2020-07-07 | 2020-11-27 | 金华职业技术学院 | High-temperature nitrogen recovery system and control method thereof |
| CN111803831A (en) * | 2020-07-23 | 2020-10-23 | 中国矿业大学 | Fire prevention and control system and control method for lithium ion battery prefabricated cabin |
| WO2022016765A1 (en) * | 2020-07-23 | 2022-01-27 | 中国矿业大学 | Fire prevention and control system for lithium ion battery prefabricated container and control method therefor |
| CN111803831B (en) * | 2020-07-23 | 2022-01-28 | 中国矿业大学 | Fire prevention and control system and control method for lithium ion battery prefabricated cabin |
| CN112815229A (en) * | 2021-01-14 | 2021-05-18 | 深圳市燃气集团股份有限公司 | Liquid natural gas unloading method and device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20180529 |