CN104406039B - Recovery system and the technique of improved liquid nitrogen container emptying nitrogen - Google Patents
Recovery system and the technique of improved liquid nitrogen container emptying nitrogen Download PDFInfo
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- CN104406039B CN104406039B CN201410685948.5A CN201410685948A CN104406039B CN 104406039 B CN104406039 B CN 104406039B CN 201410685948 A CN201410685948 A CN 201410685948A CN 104406039 B CN104406039 B CN 104406039B
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Abstract
The present invention relates to a kind of recovery system and technique of improved liquid nitrogen container emptying nitrogen, the first liquid nitrogen container, the second liquid nitrogen container is connected in tank body by pipeline respectively, the pipeline other end bleeds off pressure gate valve with the first liquid nitrogen container respectively, the second liquid nitrogen container bleeds off pressure gate valve and is connected, the first liquid nitrogen container bleeds off pressure gate valve, the second liquid nitrogen container connects respectively the first liquid nitrogen container secondary gate valve after bleeding off pressure gate valve separately, the second liquid nitrogen container secondary gate valve, between the first liquid nitrogen container secondary gate valve and the second liquid nitrogen container secondary gate valve, link together by secondary gate valve tube connector, be connected by outlet line with each tank body one side of the second liquid nitrogen container at the first liquid nitrogen container and be respectively provided with outlet valve near tank body position, can reclaim by increasing when valve ensures nitrogen emptying pressure release, the injury of low temperature nitrogen to human body while avoiding liquid nitrogen emptying pressure release, former speed is opened to quick-closing valve door simultaneously and is improved and increase positioner, possess regulatory function, be convenient to just can control valve by control system at Central Control Room aperture, ensure safety in production.
Description
Technical field
The present invention relates to a kind of nitrogen recycling system and method, specifically relate to a kind of improved liquid nitrogen container emptying nitrogenRecovery system and technique, belong to chemical field.
Background technology
Because liquid nitrogen container can only be heat insulation, can not be adiabatic, according to GB (GB18442) setting evaporating loss every day amount be0.35%; Monthly single storage tank is all wanted loss liquid nitrogen, and supercharging in 1 day is about 0.055MPa, in the normal storage process of liquid nitrogen container byBe subject to thermal evaporation in liquid nitrogen, liquid nitrogen container pressure raises, and for ensureing the not take-off of liquid nitrogen tank deck safety valve, needs artificially manually to bleed off pressure, and bleeds off pressureAfter at present directly emptying of low temperature nitrogen, so not only waste nitrogen, and in discharge process, a large amount of low temperature nitrogens are also easy to human bodyDamage.
Summary of the invention
For overcoming above-mentioned difficulties, the object of this invention is to provide a kind of recovery system of improved liquid nitrogen container emptying nitrogenAnd technique, can reclaim by increasing when valve ensures nitrogen emptying pressure release, energy-saving and cost-reducing, cryogenic nitrogen while avoiding liquid nitrogen emptying pressure releaseThe injury of gas to human body.
To achieve these goals, the technical solution adopted in the present invention is: the recovery of improved liquid nitrogen container emptying nitrogenSystem, is characterized in that: comprise that the first liquid nitrogen container, the second liquid nitrogen container, the first liquid nitrogen container bleed off pressure gate valve, the second liquid nitrogen container bleeds off pressure lockValve, the first liquid nitrogen container secondary gate valve, the second liquid nitrogen container secondary gate valve, secondary gate valve tube connector, outlet line, outlet valve, safetyValve, adjusting normal valve, liquid nitrogen vaporizer, emptying go out spoken parts in an opera steel pipeline, liquid nitrogen container Pressure gauge, liquid nitrogen vaporizer Pressure gauge; DescribedAdjusting normal valve for opening and increase locator on quick-closing valve door in former speed; The first liquid nitrogen container, the second liquid nitrogen container pass through respectively pipelineBe connected in tank body, the pipeline other end bleeds off pressure gate valve with the first liquid nitrogen container respectively, the second liquid nitrogen container bleeds off pressure gate valve and is connected, the first liquidNitrogen tank bleeds off pressure gate valve, the second liquid nitrogen container connects respectively the first liquid nitrogen container secondary gate valve, the second liquid nitrogen container two after bleeding off pressure gate valve separatelyInferior gate valve, is connected to one by secondary gate valve tube connector between the first liquid nitrogen container secondary gate valve and the second liquid nitrogen container secondary gate valveRise, be connected by outlet line with each tank body one side of the second liquid nitrogen container at the first liquid nitrogen container and be respectively provided with out near tank body positionMouth valve is connected to liquid nitrogen vaporizer by pipeline on outlet line, is provided with to regulate to determine on the pipeline of liquid nitrogen vaporizer front endPosition valve and establish emptying go out spoken parts in an opera steel pipeline and be connected with gate valve tube connector on pipeline, is provided with safety at adjusting normal valve front endValve, draws pipeline on liquid nitrogen vaporizer top and is connected to low-pressure nitrogen pipe network, described the first liquid nitrogen container, the second liquid nitrogen container differenceBy pipeline Bonding pressure table, cause in liquid nitrogen vaporizer upper end on the pipeline of low-pressure nitrogen pipe network and be provided with Pressure gauge, monitoring liquidNitrogen vaporizer air pressure.
Described secondary gate valve tube connector is low temperature resistant white steel pipeline, described the first liquid nitrogen container secondary gate valve, the second liquidNitrogen tank secondary gate valve is low temperature resistant white steel valve.
Described outlet valve is 2, and described liquid nitrogen container Pressure gauge is 2.
The technique of described improved liquid nitrogen container emptying nitrogen is:
Under normality, the first liquid nitrogen container bleeds off pressure gate valve, the second liquid nitrogen container bleeds off pressure gate valve, the first liquid nitrogen container secondary gate valve, secondLiquid nitrogen container secondary gate valve, outlet valve is set to automatically, and described outlet valve design of pressure is lower than safety valve jumping up pressure, heightIn low-pressure nitrogen ductwork pressure; In liquid nitrogen container, when gases are heated, they expand, pressure rise, the pressure of the first liquid nitrogen container, the second liquid nitrogen containerBy Pressure gauge teletransmission control separately, when the first liquid nitrogen container or the second liquid nitrogen container pressure reach safety valve jumping up pressure alarm valueTime, open adjusting normal valve, liquid nitrogen container internal pressure is gone out to spoken parts in an opera steel pipeline, regulated location by secondary gate valve tube connector, emptyingValve enters liquid nitrogen vaporizer, finally low-pressure nitrogen is incorporated to low-pressure nitrogen pipe network, ensures that nitrogen, without discharge, all reclaims, energy-conservationConsumption reduction.
Described safety valve jumping up pressure alarm value is 0.5Mpa.
The invention has the beneficial effects as follows: can reclaim by increasing when valve ensures nitrogen emptying pressure release, energy-saving and cost-reducing, avoidThe injury of low temperature nitrogen to human body when liquid nitrogen emptying pressure release; Former speed is opened to quick-closing valve door simultaneously and is improved increase positioner,Possess regulatory function, be convenient to just can control valve by control system at Central Control Room aperture, ensure safety in production.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure, 1, the first liquid nitrogen container, 2, the second liquid nitrogen container, 3, the first liquid nitrogen container bleed off pressure gate valve, 4, the second liquid nitrogen container bleeds off pressureGate valve, 5, the first liquid nitrogen container secondary gate valve, 6, the second liquid nitrogen container secondary gate valve, 7, secondary gate valve tube connector, 8, outlet line, 9,Outlet valve, 10, safety valve, 11, adjusting normal valve, 12, liquid nitrogen vaporizer, 13, emptying go out spoken parts in an opera steel pipeline 14, liquid nitrogen vaporizerPressure gauge.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
Fig. 1 shows recovery system and the process schematic representation of improved liquid nitrogen container emptying nitrogen, and its recovery system comprisesOne liquid nitrogen container 1, the second liquid nitrogen container 2, the first liquid nitrogen container bleed off pressure gate valve 3, the second liquid nitrogen container bleeds off pressure gate valve 4, the first liquid nitrogen container secondaryGate valve 5, the second liquid nitrogen container secondary gate valve 6, secondary gate valve tube connector 7, outlet line 8, outlet valve 9, safety valve 10, adjusting locationValve 11, liquid nitrogen vaporizer 12, emptying go out spoken parts in an opera steel pipeline 13, liquid nitrogen container Pressure gauge, liquid nitrogen vaporizer Pressure gauge 14; Described tuneJoint normal valve 11 for increasing locator on valve; The first liquid nitrogen container 1, the second liquid nitrogen container 2 are connected to tank body by pipeline respectivelyIn, the pipeline other end bleeds off pressure gate valve 3 with the first liquid nitrogen container respectively, the second liquid nitrogen container bleeds off pressure gate valve 4 and is connected, and the first liquid nitrogen container bleeds off pressureGate valve 3, the second liquid nitrogen container bleed off pressure the rear difference of gate valve 4 and connect separately the first liquid nitrogen container secondary gate valve 5, the second liquid nitrogen container secondary gate valveBetween 6, the first liquid nitrogen container secondary gate valves 5 and the second liquid nitrogen container secondary gate valve 6, link together by secondary gate valve tube connector 7,Be connected by outlet line 8 with each tank body one side of the second liquid nitrogen container 2 at the first liquid nitrogen container 1 and be provided with outlet near tank body positionValve 9 is connected to liquid nitrogen vaporizer 12 by pipeline on outlet line 8, on the pipeline of liquid nitrogen vaporizer 12 front ends, is provided with tuneJoint normal valve 11 and establish emptying go out spoken parts in an opera steel pipeline 13 and be connected with gate valve tube connector 7 on pipeline, before adjusting normal valve 11End is provided with safety valve 10, draws pipeline and is connected to low-pressure nitrogen pipe network, the first described liquid nitrogen container on liquid nitrogen vaporizer 12 tops1, the second liquid nitrogen container 2 connects liquid nitrogen pressure tank table by pipeline respectively, causes low-pressure nitrogen pipe network in liquid nitrogen vaporizer 12 upper endsPipeline be provided with liquid nitrogen vaporizer Pressure gauge 14, monitoring liquid nitrogen vaporizer air pressure.
Described secondary gate valve tube connector 7 is low temperature resistant white steel pipeline, described the first liquid nitrogen container secondary gate valve 5, secondLiquid nitrogen container secondary gate valve 6 is low temperature resistant white steel valve.
Liquid nitrogen container emptying nitrogen recycling as above, its concrete technology is:
In liquid nitrogen container, when gases are heated, they expand, and pressure rise, when the on-the-spot pressure rise of the first liquid nitrogen container 1 reaches liquid nitrogen container safetyWhen valve 10 release pressures (0.5Mpa) alarming value, confirm that the tank connected outlet valve 9 of the first liquid nitrogen is closed condition, open the first liquidNitrogen tank bleeds off pressure gate valve 3, the first liquid nitrogen container secondary gate valve 5, open and regulate normal valve 11, by the first liquid nitrogen container 1 internal pressure by theOne liquid nitrogen container bleeds off pressure gate valve 3, the first liquid nitrogen container secondary gate valve 5, secondary gate valve tube connector 7, emptying and goes out spoken parts in an opera steel pipeline 13 and enterLiquid nitrogen vaporizer 12 is incorporated to low-pressure nitrogen pipe network, ensures that nitrogen, without discharge, all reclaims, energy-saving and cost-reducing; When the second liquid nitrogen container 2 showsWhen field pressure rise reaches liquid nitrogen container safety valve 10 release pressures (0.5Mpa) alarming value, what confirmation the second liquid nitrogen container 2 connected goes outMouth valve 9 is closed condition, opens the second liquid nitrogen container and bleeds off pressure gate valve 4, the second liquid nitrogen container secondary gate valve 6, open and regulate normal valve 11,The second liquid nitrogen container 2 internal pressures are bled off pressure to gate valve 4, the second liquid nitrogen container secondary gate valve 6, secondary gate valve tube connector by the second liquid nitrogen container7, emptying goes out spoken parts in an opera steel pipeline 13 and enters liquid nitrogen vaporizer 12 and be incorporated to low-pressure nitrogen pipe network, ensures that nitrogen, without discharge, all reclaims,Energy-saving and cost-reducing.
Claims (4)
1. the recovery system of improved liquid nitrogen container emptying nitrogen, is characterized in that: comprise the first liquid nitrogen container, the second liquid nitrogen container,One liquid nitrogen container bleeds off pressure gate valve, the second liquid nitrogen container bleeds off pressure gate valve, the first liquid nitrogen container secondary gate valve, the second liquid nitrogen container secondary gate valve, twoInferior gate valve tube connector, outlet line, outlet valve, safety valve, adjusting normal valve, liquid nitrogen vaporizer, emptying go out spoken parts in an opera steel pipeline, liquidNitrogen pressure tank table, liquid nitrogen vaporizer Pressure gauge; Described adjusting normal valve is for opening and increase locator on quick-closing valve door in former speed; TheOne liquid nitrogen container, the second liquid nitrogen container are connected in tank body by pipeline respectively, and the pipeline other end bleeds off pressure lock with the first liquid nitrogen container respectivelyValve, the second liquid nitrogen container bleed off pressure gate valve and are connected, and the first liquid nitrogen container bleeds off pressure gate valve, the second liquid nitrogen container connects respectively after bleeding off pressure gate valve separatelyThe first liquid nitrogen container secondary gate valve, the second liquid nitrogen container secondary gate valve, the first liquid nitrogen container secondary gate valve and the second liquid nitrogen container secondary gate valveBetween link together by secondary gate valve tube connector, pass through outlet at the first liquid nitrogen container and each tank body one side of the second liquid nitrogen containerLine connects and being respectively provided with outlet valve near tank body position, is connected to liquid nitrogen vaporizer, at liquid on outlet line by pipelineThe pipeline of nitrogen vaporizer front end is provided with to regulate normal valve and on pipeline, establish emptying and goes out spoken parts in an opera steel pipeline and gate valve tube connectorBe connected, regulating normal valve front end to be provided with safety valve, draw pipeline on liquid nitrogen vaporizer top and be connected to low-pressure nitrogen pipe network, instituteThe first liquid nitrogen container, the second liquid nitrogen container stated connect liquid nitrogen pressure tank table by pipeline respectively, cause low in liquid nitrogen vaporizer upper endPress the pipeline of nitrogen pipe network to be provided with liquid nitrogen vaporizer Pressure gauge, monitoring liquid nitrogen vaporizer air pressure.
2. the recovery system of improved liquid nitrogen container emptying nitrogen according to claim 1, is characterized in that described secondaryGate valve tube connector is low temperature resistant white steel pipeline, and described the first liquid nitrogen container secondary gate valve, the second liquid nitrogen container secondary gate valve are resistance to lowWen Baigang valve.
3. the recovery system of improved liquid nitrogen container emptying nitrogen according to claim 1, is characterized in that described outletValve is 2, and described liquid nitrogen container Pressure gauge is 2.
4. the technique of improved liquid nitrogen container emptying nitrogen, is characterized in that:
Under normality, the first liquid nitrogen container bleeds off pressure gate valve, the second liquid nitrogen container bleeds off pressure gate valve, the first liquid nitrogen container secondary gate valve, the second liquid nitrogenTank secondary gate valve, outlet valve is set to automatically, and described outlet valve design of pressure is lower than safety valve jumping up pressure, higher than lowPress nitrogen ductwork pressure; When gases are heated, they expand in liquid nitrogen container, pressure rise, and the pressure of the first liquid nitrogen container, the second liquid nitrogen container is by respectivelyFrom Pressure gauge teletransmission control, in the time that the first liquid nitrogen container or the second liquid nitrogen container pressure reach safety valve jumping up pressure alarm value, beatDrive adjusting normal valve, liquid nitrogen container internal pressure is gone out to spoken parts in an opera steel pipeline, regulated normal valve to enter by secondary gate valve tube connector, emptyingLiquid nitrogen vaporizer, is finally incorporated to low-pressure nitrogen low-pressure nitrogen pipe network, ensures that nitrogen, without discharge, all reclaims, energy-saving and cost-reducing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410685948.5A CN104406039B (en) | 2014-11-26 | 2014-11-26 | Recovery system and the technique of improved liquid nitrogen container emptying nitrogen |
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| CN201410685948.5A CN104406039B (en) | 2014-11-26 | 2014-11-26 | Recovery system and the technique of improved liquid nitrogen container emptying nitrogen |
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| CN104406039A CN104406039A (en) | 2015-03-11 |
| CN104406039B true CN104406039B (en) | 2016-05-11 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108087721A (en) * | 2017-11-17 | 2018-05-29 | 深圳市燃气集团股份有限公司 | A kind of nitrogen recycling system and its recovery method |
| CN117287621B (en) * | 2023-09-22 | 2024-05-14 | 安捷汇物联信息技术（苏州）有限公司 | Intelligent freezing liquefied gas tank car fills equipment and control system |
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| US2708831A (en) * | 1953-04-09 | 1955-05-24 | Air Reduction | Separation of air |
| EP0591045A1 (en) * | 1992-10-02 | 1994-04-06 | Intertechnique | Method and installation for filling a container with liquid air |
| EP0617247A1 (en) * | 1993-03-26 | 1994-09-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic liquid recycling device and its application in a product freezing apparatus |
| 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 |
| CN202852420U (en) * | 2012-10-12 | 2013-04-03 | 甘肃中集华骏车辆有限公司 | Pressure release device of liquid carbon dioxide storage tank |
| CN203517309U (en) * | 2013-09-24 | 2014-04-02 | 灵宝鸿宇电子有限责任公司 | Recovery device for exhausted gas of liquid nitrogen container |
-
2014
- 2014-11-26 CN CN201410685948.5A patent/CN104406039B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2708831A (en) * | 1953-04-09 | 1955-05-24 | Air Reduction | Separation of air |
| EP0591045A1 (en) * | 1992-10-02 | 1994-04-06 | Intertechnique | Method and installation for filling a container with liquid air |
| EP0617247A1 (en) * | 1993-03-26 | 1994-09-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic liquid recycling device and its application in a product freezing apparatus |
| 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 |
| CN202852420U (en) * | 2012-10-12 | 2013-04-03 | 甘肃中集华骏车辆有限公司 | Pressure release device of liquid carbon dioxide storage tank |
| CN203517309U (en) * | 2013-09-24 | 2014-04-02 | 灵宝鸿宇电子有限责任公司 | Recovery device for exhausted gas of liquid nitrogen container |
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