CN106382461B - The gas cylinder static evaporation rate detection BOG retracting devices and method of liquid nitrogen auxiliary - Google Patents
The gas cylinder static evaporation rate detection BOG retracting devices and method of liquid nitrogen auxiliary Download PDFInfo
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- CN106382461B CN106382461B CN201610906120.7A CN201610906120A CN106382461B CN 106382461 B CN106382461 B CN 106382461B CN 201610906120 A CN201610906120 A CN 201610906120A CN 106382461 B CN106382461 B CN 106382461B
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- lng
- liquid nitrogen
- storage tanks
- gas cylinder
- bog
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 202
- 239000007788 liquid Substances 0.000 title claims abstract description 101
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 101
- 239000007789 gas Substances 0.000 title claims abstract description 76
- 230000008020 evaporation Effects 0.000 title claims abstract description 34
- 238000001704 evaporation Methods 0.000 title claims abstract description 34
- 230000003068 static effect Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 title abstract description 19
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 238000011084 recovery Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229920006395 saturated elastomer Polymers 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 4
- 206010020852 Hypertonia Diseases 0.000 abstract description 3
- 239000003949 liquefied natural gas Substances 0.000 description 133
- 238000005516 engineering process Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005183 dynamical system Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
-
- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
-
- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- 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
- 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
- F17C13/045—Automatic change-over switching assembly for bottled gas systems with two (or more) gas containers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses the gas cylinder static evaporation rate detection BOG retracting devices and method of a kind of liquid nitrogen auxiliary, including liquid nitrogen auxiliary device, the first storage tanks of LNG, the second storage tanks of LNG, LNG thirds storage tank and control cabinet；Gas cylinder is vented the BOG recycling in stage by liquid nitrogen auxiliary naturally；The second storage tanks of LNG and LNG thirds storage tank are in parallel by pipeline and valve body, and are connected again with liquid nitrogen auxiliary device and the first storage tanks of LNG by pipeline and valve body after parallel connection, and normal pressure gas cylinder is stood for 24 hours and static evaporation rate detection-phase alternately recycles discharged BOG.BOG is recycled in gas cylinder static evaporation rate detects detection process, and it effectively prevents influencing testing result due to LNG storage tank is saturated because reaching during absorption, it effectively prevents simultaneously in LNG storage tank caused by due to LNG volatilizees the problem of hypertonia, more practicability.
Description
Technical field
The present invention relates to the gas cylinder static evaporation rate detections that container performance detection field more particularly to a kind of liquid nitrogen assist
BOG retracting devices and method.
Background technology
Liquefied natural gas at present（Liquefied Natural Gas, LNG）It is wide as a kind of good clean energy resource
General is applied to various dynamical systems, especially LNG power vehicles, and development is very fast.LNG vehicles compared with diesel vehicle,
Nitrogen dioxide, carbon dioxide content in emission can reduce by 98% and 30% respectively, have apparent environment-friendly advantage.LNG vehicles
Gas cylinder detection process is divided into：1. pressurising gas cylinder is vented naturally；2. normal pressure gas cylinder is stood for 24 hours；3. gas cylinder static evaporation rate detects.
These three processes have the BOG of liquefied natural gas（Boil off gas, boil-off gas）Discharge, at present for LNG vehicle gas
BOG gases recycling in bottle detection process, has the following problems：
（1）Detection time is longer, and gas yield is big；By taking single gas cylinder, gas cylinder volume 500L as an example, gas cylinder detection process is held
Continuous 49h, discharge BOG total amounts about 39.9kg；In the process, LNG storage tank once absorbs saturation, then can influence entirely to detect knot
Fruit；
（2）Since the detection process time is longer, absorbs the LNG after BOG gases and be easy evaporation so that pressure in LNG storage tank
It is excessively high.
In view of defect existing for above-mentioned existing gas cylinder detection device, the present inventor is based on being engaged in such product engineering application
Practical experience and professional knowledge abundant for many years, and coordinate the utilization of scientific principle, actively it is subject to research and innovation, to found a kind of liquid
The gas cylinder static evaporation rate detection BOG retracting devices and method of nitrogen auxiliary, make it have more practicability.
Invention content
A kind of the gas cylinder static evaporation rate detection BOG retracting devices and method of liquid nitrogen auxiliary are provided in the present invention, in gas
BOG is recycled in bottle static evaporation rate detection detection process, and effectively prevents during absorption LNG storage tank because reaching
Testing result is influenced to saturation, while being avoided in LNG storage tank caused by due to LNG evaporates the problem of hypertonia, more
Practicability.
The technical solution that the present invention takes is：The gas cylinder static evaporation rate of liquid nitrogen auxiliary detects BOG retracting devices, including liquid
Nitrogen auxiliary device, the first storage tanks of LNG, the second storage tanks of LNG, LNG thirds storage tank and control cabinet；
Liquid nitrogen auxiliary device is connected by pipeline and valve body with the first storage tanks of LNG, and the BOG that gas cylinder is vented to the stage naturally is returned
It receives；
The second storage tanks of LNG and LNG thirds storage tank are in parallel by pipeline and valve body, and after parallel connection again by pipeline and valve body with
Liquid nitrogen auxiliary device and the series connection of the first storage tanks of LNG, the second storage tanks of LNG and LNG thirds storage tank stand within 24 hours in normal pressure gas cylinder and
Static evaporation rate detection-phase alternately recycles discharged BOG；
Valve body and liquid nitrogen auxiliary device, the first storage tanks of LNG, the second storage tanks of LNG and LNG thirds storage tank connect with control cabinet
It connects.
Further, liquid nitrogen auxiliary device includes the liquid nitrogen storage tank and negative pressure device for being sequentially connected in series setting, and negative pressure device makes
It obtains and forms negative pressure in liquid nitrogen storage tank.
Further, negative pressure device includes the cryogenic pump and Cryo Refrigerator being arranged in series；Cryogenic pump connects with liquid nitrogen storage tank
It connects, liquid nitrogen is sent to Cryo Refrigerator；Cryo Refrigerator is connect with liquid nitrogen storage tank top entry, and overfreezing liquid nitrogen is from liquid nitrogen storage tank top
Portion's entrance enters spray；Cryogenic pump and Cryo Refrigerator are connect with control cabinet.
Further, it is equipped with baffle plate in the first storage tanks of LNG, the second storage tanks of LNG and LNG third storage tanks.
The gas cylinder static evaporation rate of liquid nitrogen auxiliary detects BOG recovery methods, includes the following steps：
A, liquid nitrogen storage tank forms negative pressure：Liquid nitrogen auxiliary device inner valve body, cryogenic pump and cryogenic refrigeration are opened by control cabinet
Machine, remaining valve body are closed；Liquid nitrogen is delivered to Cryo Refrigerator by cryogenic pump, enters at the top of liquid nitrogen storage tank after forming overfreezing liquid nitrogen
Mouthful spray, make liquid nitrogen storage tank formed negative pressure, after reaching required negative pressure value, by control cabinet close open valve body, cryogenic pump and
Cryo Refrigerator；
B, pressurising gas cylinder is vented naturally：Pressurising gas cylinder is connected to the first tank tops of LNG so that BOG enters LNG first
Storage tank；The valve body between liquid nitrogen auxiliary device and the first storage tanks of LNG is opened by control cabinet, remaining valve body is closed；Into LNG first
The BOG being discharged in gas cylinder is liquefied and is recycled by the overfreezing liquid nitrogen of storage tank；
C, normal pressure gas cylinder is stood for 24 hours and static evaporation rate detects：By normal pressure gas cylinder respectively with the second storage tanks of LNG and LNG
Third storage tank upper entrance connects, and is controlled respectively by control cabinet between the second storage tanks of LNG and LNG thirds storage tank and normal pressure gas cylinder
Break-make so that the second storage tanks of LNG and LNG third storage tanks replace the BOG for recycling the stage emission.
Further, the gas cylinder static evaporation rate of liquid nitrogen auxiliary detects BOG recovery methods, and step C includes：
（1）It is separately turned on the valve body between liquid nitrogen auxiliary device and normal pressure gas cylinder and the second storage tanks of LNG by control cabinet so that
The BOG being discharged in normal pressure gas cylinder enters the second storage tanks of LNG（3）；Overfreezing liquid nitrogen is right through the baffle plate in the second storage tanks of LNG simultaneously
It liquefies into the BOG in storage tank；
（2）It is detected in real time by control cabinet and absorbs whether reach saturation in the second storage tanks of LNG；Before being not up to saturated, continue
Execute step（1）, when reaching saturation, execute step（3）；
（3）The valve body between liquid nitrogen auxiliary device and the second storage tank of normal pressure gas cylinder and LNG is closed by control cabinet；Open liquid nitrogen
Valve body between auxiliary device and normal pressure gas cylinder and LNG third storage tanks so that the BOG being discharged in normal pressure gas cylinder enters the LNG the
Three storage tanks；Overfreezing liquid nitrogen liquefies through the baffle plate in LNG third storage tanks to entering the BOG in storage tank simultaneously；
（4）It is detected in real time by control cabinet and absorbs whether reach saturation in LNG third storage tanks；Before being not up to saturated, execute
Step continues to execute（3）, when reaching saturation, repeat step（1）.
Further, there are following steps after the second storage tanks of LNG/LNG third storage tanks absorb saturation：Pass through control cabinet
It detects the pressure after LNG evaporations in the second storage tanks of LNG/LNG third storage tanks and opens LNG second when pressure is more than setting value
Valve body between the first storage tank of storage tank/LNG thirds storage tank and LNG, until the second storage tanks of LNG/LNG thirds storage tank and LNG first
Opened valve body is closed after tank inner pressure balance.
After using above-mentioned technical proposal, the present invention has advantageous effect below：
The gas cylinder static evaporation rate detection BOG retracting devices and method of the liquid nitrogen auxiliary provided through the invention, in gas cylinder
BOG is recycled in static evaporation rate detection detection process, is worked alternatively by the second storage tanks of LNG and LNG third storage tanks,
Effectively prevent during absorption LNG storage tank influences testing result due to reaching saturation, at the same by the second storage tanks of LNG/
The pressure balance measure of LNG thirds storage tank and the first storage tanks of LNG effectively prevents pressure caused by due to LNG volatilizees in LNG storage tank
The excessively high problem of power, more practicability.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it is therefore apparent that the accompanying drawings in the following description is only this hair
Some embodiments described in bright, for those of ordinary skill in the art, without creative efforts, also
It can be obtain other attached drawings according to these attached drawings.
Fig. 1 is that the gas cylinder static evaporation rate of liquid nitrogen of the present invention auxiliary detects the structural schematic diagram of BOG retracting devices；
Mark meaning in attached drawing：1 liquid nitrogen auxiliary device, 2 the first storage tanks of LNG, 3 the second storage tanks of LNG, the storage of 4 LNG thirds
Tank, 11 liquid nitrogen storage tanks, 12 negative pressure devices, 13 cryogenic pumps, 14 Cryo Refrigerators.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution in the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work, should all belong to protection of the present invention
Range.
The embodiment of the present invention is write by the way of progressive.
As shown in Figure 1, a kind of gas cylinder static evaporation rate of liquid nitrogen auxiliary detects BOG retracting devices, including liquid nitrogen auxiliary dress
Set the first storage tanks of 1, LNG 2, the second storage tanks of LNG 3, LNG thirds storage tank 4 and control cabinet；Liquid nitrogen auxiliary device 1 passes through pipeline and valve
Body is connected with the first storage tanks of LNG 2, and gas cylinder is vented to the BOG recycling in stage naturally；The second storage tanks of LNG 3 and LNG thirds storage tank 4
It is in parallel by pipeline and valve body, and connected again with liquid nitrogen auxiliary device 1 and the first storage tanks of LNG 2 by pipeline and valve body after parallel connection,
The second storage tanks of LNG 3 and LNG thirds storage tank 4 alternately recycle institute in 24 hours standings of normal pressure gas cylinder and static evaporation rate detection-phase
The BOG of discharge；Wherein valve body and liquid nitrogen auxiliary device, the first storage tanks of LNG, the second storage tanks of LNG and LNG thirds storage tank with control
Case connects；It is equipped with baffle plate in the first storage tanks of LNG 2, the second storage tanks of LNG 3 and LNG thirds storage tank 4
Wherein liquid nitrogen auxiliary device 1 includes the liquid nitrogen storage tank 11 and negative pressure device 12 for being sequentially connected in series setting, negative pressure device 12
So that negative pressure is formed in liquid nitrogen storage tank 11, and negative pressure is realized by following procedure：Negative pressure device 12 includes being arranged in series
Cryogenic pump 13 and Cryo Refrigerator 14；Cryogenic pump 13 is connect with liquid nitrogen storage tank 11, and liquid nitrogen is sent to Cryo Refrigerator 14；Low temperature system
Cold 14 is connect with 11 top entry of liquid nitrogen storage tank, and overfreezing liquid nitrogen enters spray from 11 top entry of liquid nitrogen storage tank, to reduce
Pressure in liquid nitrogen storage tank 11, pressure is negative pressure in final liquid nitrogen storage tank 11；Cryogenic pump 13 and Cryo Refrigerator 14 are and control cabinet
Connection.
The gas cylinder static evaporation rate of liquid nitrogen auxiliary detects BOG recovery methods, includes the following steps：
When A, starting to work, liquid nitrogen storage tank 11 is needed to be initially formed negative pressure：It is opened in liquid nitrogen auxiliary device 1 by control cabinet
Valve body, cryogenic pump 13 and Cryo Refrigerator 14, remaining valve body are closed；Liquid nitrogen is delivered to Cryo Refrigerator 14 by cryogenic pump 13,
It is sprayed from 11 top entry of liquid nitrogen storage tank after forming overfreezing liquid nitrogen, to reduce pressure in liquid nitrogen storage tank 11, final liquid nitrogen storage tank
Pressure is negative pressure in 11, and after reaching required negative pressure value, valve body, cryogenic pump 13 and the Cryo Refrigerator opened are closed by control cabinet
14；
B, pressurising gas cylinder is vented naturally：Pressurising gas cylinder is directly connected to 2 top of the first storage tanks of LNG so that BOG enters
The first storage tanks of LNG 2；The valve body between liquid nitrogen auxiliary device 1 and the first storage tanks of LNG 2 is opened by control cabinet, remaining valve body is closed；
Overfreezing liquid nitrogen into the first storage tanks of LNG 2 recycles the BOG being discharged in gas cylinder liquefaction；
C, the normal pressure gas cylinder of natural drain is stood for 24 hours and static evaporation rate detects：By normal pressure gas cylinder respectively with LNG
Second storage tank 3 is connected with 4 upper entrance of LNG thirds storage tank, controls the second storage tanks of LNG 3 and the storage of LNG thirds respectively by control cabinet
Break-make between tank 4 and normal pressure gas cylinder so that the second storage tanks of LNG 3 and LNG thirds storage tank 4 replace the BOG for recycling the stage emission,
Effectively prevent LNG storage tank during absorption influences testing result because reaching saturation, is as follows：
（1）It is separately turned on the valve between liquid nitrogen auxiliary device 1 and normal pressure gas cylinder and the second storage tanks of LNG 3 by the control cabinet
Body so that the BOG being discharged in normal pressure gas cylinder enters the second storage tanks of LNG 3；Overfreezing liquid nitrogen is through the baffling in the second storage tanks of LNG 3 simultaneously
Plate liquefies to entering the BOG in storage tank；
（2）Detect in the second storage tanks of LNG 3 absorb whether reach saturation in real time by the control cabinet；Before being not up to saturated,
Continue to execute step（1）, when reaching saturation, execute step（3）, wherein after the second storage tanks of LNG 3, which absorb, to be saturated, due to LNG
LNG evaporates in second storage tank 3, and pressure inside the tank rises, and the pressure in the second storage tanks of LNG 3 after LNG evaporations is detected by control cabinet,
When pressure is more than setting value, the valve body between the second storage tanks of LNG 3 and the first storage tanks of LNG 2 is opened,
The LNG of recycling storage flows into the first storage tanks of LNG 2 through valve body in the second storage tanks of LNG 3, until the second storage tanks of LNG 3 with
Opened valve body is closed in the first storage tanks of LNG 2 after pressure balance；
（3）Liquid nitrogen auxiliary device 1 and the valve body between normal pressure gas cylinder and the second storage tanks of LNG 3 are closed by control cabinet；Open liquid
Valve body between nitrogen auxiliary device 1 and normal pressure gas cylinder and LNG thirds storage tank 4 so that the BOG being discharged in normal pressure gas cylinder enters LNG
Three storage tanks 4；Overfreezing liquid nitrogen liquefies through the baffle plate in LNG thirds storage tank 4 to entering the BOG in storage tank simultaneously；
（4）It is detected in real time by control cabinet in LNG thirds storage tank 4 and absorbs whether reach saturation；Before being not up to saturated, execute
Step continues to execute（3）, when reaching saturation, repeat step（1）；Wherein, after LNG thirds storage tank 4, which absorbs, to be saturated, due to
LNG evaporates in LNG thirds storage tank 4, and pressure inside the tank rises, and the pressure in LNG thirds storage tank 4 after LNG evaporations is detected by control cabinet
Power is opened the valve body between LNG thirds storage tank 4 and the first storage tanks of LNG 2, is returned in LNG thirds storage tank 4 when pressure is more than setting value
It stores up the LNG deposited and flows into the first storage tanks of LNG 2 through valve body, until in LNG thirds storage tank 4 and the first storage tanks of LNG 2 after pressure balance
Opened valve body is closed, while being arranged by the pressure balance of 3/ the first storage tanks of LNG thirds storage tank 4 and LNG 2 of the second storage tanks of LNG
It applies, effectively prevents in LNG storage tank caused by due to LNG volatilizees the problem of hypertonia
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (5)
1. the gas cylinder static evaporation rate of liquid nitrogen auxiliary detects BOG retracting devices, it is characterised in that：Including liquid nitrogen auxiliary device（1）、
The first storage tanks of LNG（2）, the second storage tanks of LNG（3）, LNG third storage tanks（4）And control cabinet；
The liquid nitrogen auxiliary device（1）Pass through pipeline and valve body and the first storage tanks of the LNG（2）Series connection, gas cylinder is vented naturally
The BOG in stage is recycled；
The second storage tanks of the LNG（3）With LNG third storage tanks（4）It is in parallel by pipeline and valve body, and after parallel connection again by pipeline and
Valve body and the liquid nitrogen auxiliary device（1）With the first storage tanks of LNG（2）Series connection, the second storage tanks of the LNG（3）With LNG third storage tanks
（4）It is stood within 24 hours in normal pressure gas cylinder and static evaporation rate detection-phase alternately recycles discharged BOG；
The valve body and the liquid nitrogen auxiliary device（1）, the first storage tanks of LNG（2）, the second storage tanks of LNG（3）With LNG third storage tanks
（4）It is connect with the control cabinet；
The liquid nitrogen auxiliary device（1）Liquid nitrogen storage tank including being sequentially connected in series setting（11）And negative pressure device（12）, the negative pressure
Device（12）Make the liquid nitrogen storage tank（11）Interior formation negative pressure；
The first storage tanks of the LNG（2）, the second storage tanks of LNG（3）With LNG third storage tanks（4）Inside it is equipped with baffle plate.
2. the gas cylinder static evaporation rate of liquid nitrogen auxiliary according to claim 1 detects BOG retracting devices, it is characterised in that：
The negative pressure device（12）Including the cryogenic pump being arranged in series（13）And Cryo Refrigerator（14）；The cryogenic pump（13）With it is described
Liquid nitrogen storage tank（11）Connection, liquid nitrogen is sent to the Cryo Refrigerator（14）；The Cryo Refrigerator（14）It is stored up with the liquid nitrogen
Tank（11）Top entry connects, and overfreezing liquid nitrogen is from the liquid nitrogen storage tank（11）Top entry enters spray;The cryogenic pump（13）
And Cryo Refrigerator（14）It is connect with the control cabinet.
3. the gas cylinder static evaporation rate of liquid nitrogen auxiliary detects BOG recovery methods, which is characterized in that include the following steps：
A, liquid nitrogen storage tank（11）Form negative pressure：Liquid nitrogen auxiliary device is opened by control cabinet（1）Inner valve body, cryogenic pump（13）With it is low
Warm refrigeration machine（14）, the closing of remaining valve body；Liquid nitrogen passes through the cryogenic pump（13）It is delivered to the Cryo Refrigerator（14）, formed
From the liquid nitrogen storage tank after overfreezing liquid nitrogen（11）Top entry sprays, and makes the liquid nitrogen storage tank（11）Negative pressure is formed, reaches required
After negative pressure value, the valve body opened, cryogenic pump are closed by the control cabinet（13）And Cryo Refrigerator（14）；
B, pressurising gas cylinder is vented naturally：By pressurising gas cylinder and the first storage tanks of LNG（2）Top is connected to so that BOG enters the LNG
First storage tank（2）；The liquid nitrogen auxiliary device is opened by the control cabinet（1）With the first storage tanks of the LNG（2）Between valve
Body, remaining valve body are closed；Into the first storage tanks of the LNG（2）Overfreezing liquid nitrogen by the BOG being discharged in gas cylinder liquefy recycle；
C, normal pressure gas cylinder is stood for 24 hours and static evaporation rate detects：By normal pressure gas cylinder respectively with the second storage tanks of LNG（3）And LNG
Third storage tank（4）Upper entrance connects, and the second storage tanks of LNG are controlled respectively by the control cabinet（3）With LNG third storage tanks（4）
With the break-make between normal pressure gas cylinder so that the second storage tanks of the LNG（3）With LNG third storage tanks（4）Alternating recycles the stage emission
BOG。
4. the gas cylinder static evaporation rate of liquid nitrogen auxiliary according to claim 3 detects BOG recovery methods, which is characterized in that
Step C includes：
Step 1：It is separately turned on the liquid nitrogen auxiliary device by the control cabinet（1）It is stored up with normal pressure gas cylinder and the LNG second
Tank（3）Between valve body so that the BOG being discharged in normal pressure gas cylinder enter the second storage tanks of the LNG（3）；Overfreezing liquid nitrogen is through institute simultaneously
State the second storage tanks of LNG（3）Interior baffle plate liquefies to entering the BOG in storage tank；
Step 2：The second storage tanks of the LNG are detected in real time by the control cabinet（3）Whether interior absorption reaches saturation；Not up to
Before saturation, step is continued to execute（1）, when reaching saturation, execute step（3）；
Step 3：The liquid nitrogen auxiliary device is closed by the control cabinet（1）With normal pressure gas cylinder and the second storage tanks of the LNG
（3）Between valve body；Open the liquid nitrogen auxiliary device（1）With normal pressure gas cylinder and the LNG thirds storage tank（4）Between valve body, make
It obtains the BOG being discharged in normal pressure gas cylinder and enters the LNG thirds storage tank（4）；Overfreezing liquid nitrogen is through the LNG thirds storage tank simultaneously（4）
Interior baffle plate liquefies to entering the BOG in storage tank；
Step 4：The LNG thirds storage tank is detected in real time by the control cabinet（4）Whether interior absorption reaches saturation；Not up to
Before saturation, step 3 is continued to execute, when reaching saturation, repeats step 1.
5. the gas cylinder static evaporation rate of liquid nitrogen auxiliary according to claim 4 detects BOG recovery methods, it is characterised in that：
When the second storage tanks of the LNG（3）/ LNG third storage tanks（4）There are following steps after absorption saturation：Pass through the control cabinet
Detect the second storage tanks of the LNG（3）/ LNG third storage tanks（4）Pressure after interior LNG evaporations is opened when pressure is more than setting value
Open the second storage tanks of the LNG（3）/ LNG third storage tanks（4）With the first storage tanks of the LNG（2）Between valve body, until the LNG
Second storage tank（3）/ LNG third storage tanks（4）With the first storage tanks of the LNG（2）Opened valve body is closed after interior pressure balance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610906120.7A CN106382461B (en) | 2016-10-18 | 2016-10-18 | The gas cylinder static evaporation rate detection BOG retracting devices and method of liquid nitrogen auxiliary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610906120.7A CN106382461B (en) | 2016-10-18 | 2016-10-18 | The gas cylinder static evaporation rate detection BOG retracting devices and method of liquid nitrogen auxiliary |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106382461A CN106382461A (en) | 2017-02-08 |
| CN106382461B true CN106382461B (en) | 2018-07-27 |
Family
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| JPH1182893A (en) * | 1997-09-01 | 1999-03-26 | Tokyo Electric Power Co Inc:The | Compressed gas cooling system |
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| CN2663548Y (en) * | 2003-10-20 | 2004-12-15 | 陈均 | Negative pressure gathering tank |
| CN102011939A (en) * | 2010-10-28 | 2011-04-13 | 华南理工大学 | System and method for temperature reduction and pressure stabilization of liquefied natural gas storage tank |
| CN103697956A (en) * | 2013-12-09 | 2014-04-02 | 上海齐耀动力技术有限公司 | System for measuring evaporation rate of cryogenic vessel with stable back pressure |
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