CN207921739U - A kind of LNG combined types aerating storage tank gasification station - Google Patents
A kind of LNG combined types aerating storage tank gasification station Download PDFInfo
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- CN207921739U CN207921739U CN201820600360.9U CN201820600360U CN207921739U CN 207921739 U CN207921739 U CN 207921739U CN 201820600360 U CN201820600360 U CN 201820600360U CN 207921739 U CN207921739 U CN 207921739U
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- 238000002309 gasification Methods 0.000 title claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 110
- 239000012071 phase Substances 0.000 claims abstract description 89
- 239000007791 liquid phase Substances 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000003795 desorption Methods 0.000 claims description 22
- 238000009792 diffusion process Methods 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims 2
- 238000009834 vaporization Methods 0.000 abstract description 4
- 230000008016 vaporization Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 69
- 229920006395 saturated elastomer Polymers 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model provides a kind of LNG combined types aerating storage tank gasification station, including combined type storage tank and gasification station ontology, and gasification station ontology is connected to by upper inlet pipe, lower inlet pipe, LNG outlet tubes road and BOG pipelines with combined type storage tank；Gasification station includes liquid phase mouth of unloading, unload gas phase mouth and gasifying mouth of unloading；Gas phase mouth of unloading is connected by BOG pipelines with the A gas phase mouths of combined type storage tank, B gas phase mouths；Liquid phase mouth of unloading by LNG unload liquid pipeline respectively with upper inlet pipe, lower inlet pipe and unload liquid and go out one end of liquid shortcut pipe and be connected；The other end of upper inlet pipe is connected with the upper inlet of inlet, B on A；The other end of lower inlet pipe is connected with inlet under inlet, B under A.The utility model solve LNG gasification station unload can not achieve during liquid continuous gasification stablize gas supply operation problem and when gasification station amount of vaporization is little BOG emission problem, while solving in the prior art that equipment cost is high, energy consumption is high and complex structure and other problems.
Description
Technical field
The utility model belongs to gasification station field, more particularly, to a kind of LNG combined types aerating storage tank gasification station.
Background technology
LNG storage tank (LNG tank) is low-temperature storage tank, and the LNG temperature of storage is at -160 DEG C or so.In storage tank
When the saturated vapour pressure of LNG is too high, the higher setting value beyond pressure regulator of air temperature gasifier exit pressure can be made, lead to safety valve
Superpressure pressure regulator excess pressure cutout influences the normal gas supply of LNG vaporization equipment, flame-out so as to cause gas fired-boiler, influences production
It is normally carried out；When the saturated vapour pressure of LNG in storage tank is too low, air temperature gasifier exit pressure is relatively low to pass through pressure regulator pressure regulation
The hypotony of natural gas afterwards, cannot meet the igniting requirement of gas fired-boiler, and production can not also carry out.In practice, in order to
Ensure the stabilization of LNG gasification pressure and ensure operational safety, the saturated vapor for adjusting LNG in storage tank is needed to be pressed in certain model
In enclosing.
When for LNG when soon close to minimum liquid level, since gas-phase space is very big in storage tank, LNG saturated vapour pressures are very in storage tank
Hardly possible is adjusted, and threat is brought to the stable operation of production.Especially LNG runs low in LNG storage tank, and problem is just more when unloading LNG
It is prominent.LNG is unloaded from LNG tank cars to LNG storage tank, this is known as LNG and unloads liquid stream journey.LNG is unloaded in liquid stream journey, it is desirable that reduces storage as far as possible
The saturated vapour pressure of LNG in tank improves the saturated vapour pressure of LNG in tank car, then leans on LNG between LNG tank cars and LNG storage tank full
It carries out unloading liquid operation with the pressure difference of vapour pressure.When the saturated vapour pressure of LNG is reduced to normal range (NR) or less in storage tank, be conducive to
The operation of unloading of LNG, but pressure will substantially reduce after gasification, will result in the stagnation of production sometimes.Keep normal operation
When pressure, unloading liquid can not carry out again.Common practice when unloading liquid stream journey in practice is to keep the saturation of LNG storage tank as possible
Vapour pressure is in the lower limit of service pressure range, ensures normal gas supply.Then the saturated vapour pressure of LNG tank cars is controlled
The upper limit of normally-pressured neighbor makes the time of unloading of LNG greatly prolong, and could complete within more than ten hour sometimes to unload liquid operation, give
Operation is brought a lot of trouble, and careless slightly saturated vapour pressure exceeds index, will interrupt gas supply or LNG tank car safety valve jumping ups
Influence safety in production.
Invention content
In view of this, the utility model is directed to a kind of LNG combined types aerating storage tank gasification station, solve LNG aeratings
Station, which is unloaded, to be supplied unstable careless slightly will result in during liquid and stops the supple of gas or steam, unloads liquid overlong time and the BOG when the tolerance that gasifies is little
Emission problem, the discharge of BOG had not only caused energy waste but also had caused the destruction to ozone layer, while solving and setting in the prior art
It is standby of high cost, energy consumption height and complex structure and other problems.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of LNG combined types aerating storage tank gasification station, including combined type storage tank and gasification station ontology, gasification station ontology pass through
Upper inlet pipe, lower inlet pipe, LNG outlet tubes road and BOG pipelines are connected to combined type storage tank；
Gasification station ontology includes liquid phase mouth of unloading, unload gas phase mouth and gasifying mouth of unloading；
Gas phase mouth of unloading is connected by BOG pipelines with the A gas phase mouths of combined type storage tank, B gas phase mouths；
Liquid phase mouth of unloading by LNG unload liquid pipeline respectively with upper inlet pipe, lower inlet pipe and unload liquid and go out liquid shortcut
One end of pipe is connected；
The other end of upper inlet pipe is connected with the upper inlet of inlet, B on A；
The other end of lower inlet pipe is connected with inlet under inlet, B under A；
It unloads liquid and goes out the other end of liquid shortcut pipe and be connected with air-heating type gasifier, auxiliary hot pressure regulation is connected behind air-heating type gasifier
Metering pipeline；
LNG outlet tubes road one end is connected with unloading liquid and go out liquid shortcut pipe, and the other end is exported with medium A, B media outlets are connected；
Gasifying mouth of unloading is connected by pipeline with supercharging gasifier import, and the outlet for being pressurized gasifier passes through pipeline and BOG
Pipeline communicates, and supercharging gasifier import also unloads liquid pipeline with LNG by pipeline and is connected.
Further, LNG is unloaded is provided with unidirectionally on the pipeline that liquid pipeline is located at before being connected with supercharging gasifier import
Valve.
Further, the pipeline between air-heating type gasifier and pressure piping is main line, is also arranged in parallel on main line
There is heating pipeline, the both ends for heating pipeline are connect with main line, and heating tube road is connected with water-bath type heater.
Further, there are two air-heating type gasifier is arranged in parallel.
Further, combined type storage tank includes composite can and pipeline, and composite can includes inner tank body and outer tank body, inner tank body and
It is vacuum interlayer between outer tank body, inner tank body is divided into two tanks, respectively A tanks and B tanks, spaced between A tanks and B tanks to set
Set, the side of composite can be provided with the A that pipeline is connected to A tanks survey profusely, the outlet of A inlets, medium A, be connected to B tanks
B survey profusely, the outlet of B inlets, medium B, be both provided with valve on pipeline；
A tanks are responsible for by A and are connected to A tank regulating mechanisms, and the one end of A supervisors in A tanks is located at the top in A tanks, B
Tank is responsible for by B and is connected to B tank regulating mechanisms, and the one end of B supervisors in B tanks is located at the top in B tanks, and A supervisors and B are responsible for
Between be connected to by connecting tube, and be provided in connecting tube from B and be responsible for the pneumatic control valve be responsible for A；
A tank regulating mechanisms include A diffusion mouths and A gas phase mouths, and A diffusion mouths and A gas phase mouths pass through A desorption tubes and A gas respectively
Mutually pipe is connected with A supervisors, and A safety valves are provided on A desorption tubes；
B tank regulating mechanisms include B diffusion mouths and B gas phase mouths, and B diffusion mouths and B gas phase mouths pass through B desorption tubes and B gas respectively
Mutually pipe is connected with B supervisors, and B safety valves are provided on B desorption tubes.
Further, A tanks are connected with A tank liquid level sensing devices, and A tank liquid level sensing devices include A tank gas phase connecting pipes
Road, A tank liquid phases impulse piping, A tank liquid level teletransmissions gas phase mouth, A tank liquid level teletransmission liquid phase mouths, the both ends of A tank gas phase impulse piping
Be separately connected top and the A tank liquid level teletransmission gas phase mouths of A tanks, the both ends of A tank liquid phase impulse piping be separately connected A tanks lower part and
A tank liquid level teletransmission liquid phase mouths, are connected between A tank gas phase impulse piping and A tank liquid phase impulse piping by connection valve, A tank gas phases
Impulse piping and A tanks liquid phase impulse piping are located at the pipeline after connection valve and are connected with live liquid level meter, pressure gauge.
Further, B tanks are connected with B tank liquid level sensing devices, B tank liquid level sensing devices include B tank gas phases impulse piping,
B tank liquid phases impulse piping, B tank liquid level teletransmissions gas phase mouth, B tank liquid level teletransmission liquid phase mouths, the both ends difference of B tank gas phase impulse piping
The top and B tank liquid level teletransmission gas phase mouths, the both ends of B tank liquid phase impulse piping for connecting B tanks are separately connected lower part and the B tanks of B tanks
Liquid level teletransmission liquid phase mouth is connected between B tank gas phase impulse piping and B tank liquid phase impulse piping by connection valve, B tank gas phase pilots
Pipeline and B tank liquid pilot phase pipelines are located at the pipeline after connection valve and are connected with live liquid level meter, pressure gauge.
Further, A inlets include inlet under inlet and A on A, in the upper inlet connecting pipe connection A tanks of A
Top, the lower part under A in inlet connecting pipe connection A tanks.
Further, B inlets include inlet under inlet and B on B, in the upper inlet connecting pipe connection B tanks of B
Top, the lower part under B in inlet connecting pipe connection B tanks.
Further, the pressure for the volume and A tanks that the volume of A tanks is less than B tanks is more than the pressure of B tanks.
Further, it is provided with vacuum pumping valve in the outer tank body of composite can.
Further, between A desorption tubes and A gas phase pipes by valve be connected, be arranged in parallel on A desorption tubes there are two A pacify
Full valve, A safety valves are connected to by threeway with A desorption tubes.
Further, between B desorption tubes and B gas phase pipes by valve be connected, be arranged in parallel on B desorption tubes there are two B pacify
Full valve, B safety valves are connected to by threeway with B desorption tubes.
Compared with the existing technology, LNG combined types aerating storage tank gasification station described in the utility model has the advantage that：
Solve the problems, such as one：The prior art can not achieve persistently to LNG storage tank saturated vapour pressure regulation problem, cause to run
It is unstable and there are security risks；
Solve the problems, such as two：In the prior art when LNG liquid levels are relatively low in storage tank, since gas-phase space is very big in storage tank,
LNG saturated vapour pressures are difficult to adjust, and threat is brought to the stable operation of production；
Solve the problems, such as three：When LNG tank cars unload liquid in the prior art, to keep LNG storage tank that there is certain saturated vapor
Pressure to maintain gasification station that can continuously supply, cause to unload the liquid time it is too long be not easy to operate, careless slightly gasification station when unloading liquid is just
It is unable to safe and stable operation.
Description of the drawings
The attached drawing for constituting the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The illustrative embodiments and their description of type are not constituted improper limits to the present invention for explaining the utility model.
In attached drawing：
Fig. 1 is the simple structure schematic diagram of the LNG combined type aerating storage tank gasification stations described in the utility model embodiment；
Fig. 2 is enlarged drawing at I in Fig. 1；
Fig. 3 is enlarged drawing at II in Fig. 1；
Fig. 4 is enlarged drawing at III in Fig. 1；
Fig. 5 is enlarged drawing at IV in Fig. 1
Fig. 6 is enlarged drawing at V in Fig. 1；
Fig. 7 is enlarged drawing at VI in Fig. 1.
Reference sign：
1- outer tank bodies；2-A tanks；3-B tanks；4-A is surveyed profusely；The upper inlets of 51-A；Inlet under 52-A；6-A media outlets；
7-B is surveyed profusely；The upper inlets of 81-B；Inlet under 82-B；9-B media outlets；10-A is responsible for；11-B is responsible for；12- pneumatic controls
Valve；13-A diffusion mouths；14-A gas phase mouths；15-A safety valves；16-B diffusion mouths；17-B gas phase mouths；18-B safety valves；19-A tank liquid
Position teletransmission gas phase mouth；20-A tank liquid level teletransmission liquid phase mouths；21-B tank liquid level teletransmission gas phase mouths；22-B tank liquid level teletransmission liquid phase mouths；
The upper inlet pipes of 23-；Inlet pipe under 24-；25-LNG outlet tubes road；26-BOG pipelines；27- unloads liquid phase mouth；28- unloads gas
Phase mouth；29- unloads gasifying mouth；30-LNG unloads liquid pipeline；31- unloads liquid and goes out liquid shortcut pipe；32- air-heating type gasifiers；33- is pressurized
Gasifier；34- main lines；35- heats pipeline；36- water-bath type heaters.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more this feature.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in figs. 1-7, a kind of LNG combined types aerating storage tank gasification station, including combined type storage tank and gasification station ontology, gas
Change station ontology and passes through upper inlet pipe 23, lower inlet pipe 24, LNG outlet tubes road 25 and BOG pipelines 26 and combined type storage tank
Connection；
Gasification station ontology includes liquid phase mouth 27 of unloading, unload gas phase mouth 28 and gasifying mouth 29 of unloading；
Gas phase mouth 28 of unloading is connected by BOG pipelines 26 with the A gas phase mouths 14 of combined type storage tank, B gas phase mouths 17；
Liquid phase mouth of unloading 27 by LNG unload liquid pipeline 30 respectively with upper inlet pipe 23, lower inlet pipe 24 and unload liquid
The one end for going out liquid shortcut pipe 31 is connected；
The upper inlet of the other end of upper inlet pipe 23 and inlet on A 51, B 81 is connected；
The other end of lower inlet pipe 24 connects with inlet phase 82 under inlet under A 52, B；
It unloads liquid and goes out the other end of liquid shortcut pipe 31 and be connected with air-heating type gasifier 32, connected behind air-heating type gasifier 32
Auxiliary hot pressure regulation metering pipeline；
25 one end of LNG outlet tubes road is connected with unloading liquid and go out liquid shortcut pipe 31, and the other end and medium A outlet, medium B export phase
Even；
Gasifying mouth 29 of unloading is connected by pipeline with supercharging 33 import of gasifier, and the outlet of supercharging gasifier 33 passes through pipeline
It is communicated with BOG pipelines 26, supercharging 33 import of gasifier also unloads liquid pipeline 30 by pipeline with LNG and is connected.
Above-mentioned LNG is unloaded to be provided with unidirectionally on the pipeline that liquid pipeline 30 is located at before being connected with supercharging 33 import of gasifier
Valve.
Pipeline between above-mentioned air-heating type gasifier 32 and pressure piping is main line 34, and going back parallel connection on main line 34 sets
It is equipped with heating pipeline 35, the both ends of heating pipeline 35 are connect with main line 34, are heated and are connected with water-bath type heating on pipeline 35
Device 36.
There are two above-mentioned air-heating type gasifier 32 is arranged in parallel.
Said combination formula storage tank includes composite can and pipeline, and composite can includes inner tank body and outer tank body 1, inner tank body and outer tank
It is vacuum interlayer between body 1, inner tank body is divided into two tanks, respectively A tanks 2 and B tanks 3, spaced between A tanks 2 and B tanks 3 to set
Set, the side of composite can be provided with the A that pipeline is connected to A tanks 2 survey profusely 4, A inlets, medium A outlet 6, with B tanks 3
The B of connection survey profusely 7, B inlets, medium B outlet 9, be both provided with valve on pipeline；
A tanks 2 are connected to by A supervisors 10 with A tank regulating mechanisms, and the one end of A supervisors 10 in A tanks 2 is located in A tanks 2
Top, B tanks 3 are connected to by B supervisors 11 with B tank regulating mechanisms, and the one end of B supervisors 11 in B tanks 3 is located at upper in B tanks 3
Portion is connected between A supervisors 10 and B supervisors 11 by connecting tube, and the gas that 11 to A supervisors 10 are responsible for from B is provided in connecting tube
Dynamic control valve 12；
A tank regulating mechanisms include A diffusion mouths 13 and A gas phase mouths 14, and A diffusion mouths 13 and A gas phase mouths 14 are diffused by A respectively
Pipe and A gas phases pipe are connected with A supervisors 10, and A safety valves 15 are provided on A desorption tubes；
B tank regulating mechanisms include B diffusion mouths 16 and B gas phase mouths 17, and B diffusion mouths 16 and B gas phase mouths 17 are diffused by B respectively
Pipe and B gas phases pipe are connected with B supervisors 11, and B safety valves 18 are provided on B desorption tubes.
Above-mentioned A tanks 2 are connected with A tank liquid level sensing devices, and A tank liquid level sensing devices include A tank gas phases impulse piping, A tanks
Liquid phase impulse piping, A tank liquid level teletransmissions gas phase mouth 19, A tank liquid level teletransmissions liquid phase mouth 20, the both ends point of A tank gas phase impulse piping
Not Lian Jie A tanks 2 top and A tank liquid level teletransmissions gas phase mouth 19, the both ends of A tank liquid phase impulse piping be separately connected the lower part of A tanks 2
With A tank liquid level teletransmissions liquid phase mouth 20, it is connected to by connection valve between A tank gas phase impulse piping and A tank liquid phase impulse piping, A tanks
Gas phase impulse piping and A tanks liquid phase impulse piping are located at the pipeline after connection valve and are connected with live liquid level meter, pressure gauge.
Above-mentioned B tanks 3 are connected with B tank liquid level sensing devices, and B tank liquid level sensing devices include B tank gas phases impulse piping, B tanks
Liquid phase impulse piping, B tank liquid level teletransmissions gas phase mouth 21, B tank liquid level teletransmissions liquid phase mouth 22, the both ends point of B tank gas phase impulse piping
Not Lian Jie B tanks 3 top and B tank liquid level teletransmissions gas phase mouth 21, the both ends of B tank liquid phase impulse piping be separately connected the lower part of B tanks 3
With B tank liquid level teletransmissions liquid phase mouth 22, it is connected to by connection valve between B tank gas phase impulse piping and B tank liquid phase impulse piping, B tanks
Gas phase impulse piping and B tank liquid pilot phase pipelines are located at the pipeline after connection valve and are connected with live liquid level meter, pressure gauge.
Above-mentioned A inlets include inlet 52 under inlet 51 and A on A, in upper 51 connecting pipe of the inlet connection A tanks of A 2
Top, the lower part under A in 52 connecting pipe of inlet connection A tanks 2.
Above-mentioned B inlets include inlet 82 under inlet 81 and B on B, in upper 81 connecting pipe of the inlet connection B tanks of B 3
Top, the lower part under B in 82 connecting pipe of inlet connection B tanks 3.
The volume of above-mentioned A tanks 2 is less than the volume of B tanks 3.
The design pressure of above-mentioned A tanks 2 is more than the design pressure of B tanks 3.
It is provided with vacuum pumping valve in the outer tank body 1 of said combination tank.
It is connected by valve between above-mentioned A desorption tubes and A gas phase pipes, is arranged in parallel on A desorption tubes there are two A safety valves
15, A safety valves 15 are connected to by threeway with A desorption tubes.
It is connected by valve between above-mentioned B desorption tubes and B gas phase pipes, is arranged in parallel on B desorption tubes there are two B safety valves
18, B safety valves 18 are connected to by threeway with B desorption tubes.
Workflow：
Combined type storage tank adjusts the workflow of LNG saturated vapor pressures specifically, B tanks 3 are in fortune during LNG gasification
Row state, A tanks 2 are in standby.In operational process, when LNG gasification amount is smaller, B tanks 3 will produce BOG, with BOG amounts
Increasing the LNG saturated vapor pressures of B tanks 3 can increase, and when the LNG saturated vapor pressures of B tanks 3 are increased to beyond normal value, LNG passes through
After air temperature gasifier 32 gasifies, pressure can exceed the setting range of pressure regulator, lead to safety valve superpressure, pressure regulator excess pressure cutout,
The normal gas supply for influencing LNG vaporization equipment, it is flame-out so as to cause gas fired-boiler, influence being normally carried out for production.B master is opened at this time
Pipe 11 and A are responsible for the pneumatic control valve 12 between 10, and the BOG in B tanks 3 will pass through B and be responsible for 11, pneumatic control valve 12 and A master
Pipe 10 enters the top in A tanks 2, after the saturated vapor pressure in B tanks 3 drops to normal value, closes pneumatic control valve 12, complete
At the adjusting for reducing LNG saturated vapor pressures in B tanks 3.
When amount of vaporization is larger, the LNG saturated vapour pressures in B tanks 3 can continuously decrease, when the saturated vapor of LNG in B tanks 3
When pressure is too low, the hypotony of the relatively low natural gas after pry regulator pressure regulation of 32 outlet pressure of air-heating type gasifier cannot meet
The igniting requirement of gas fired-boiler, production can not also carry out.The pneumatic control valve 12 that A is responsible between 10 and B supervisors 11 is opened at this time,
The BOG of 2 internal upper part of A tanks will be responsible for 10, autocontrol valve 12 and B supervisors 11 by A, enter the top in B tanks 3, work as B
After saturated vapor pressure in tank 3 is raised to normal value, pneumatic control valve 12 is closed, completes to increase LNG saturated vapors in composite can B3
The adjustment effect of pressure.
For the workflow of BOG recycling specifically, B tanks 3 are in operating status in gasification, A tanks 2 are in standby shape
State.It when the LNG liquid levels in B tanks 3 are in low liquid level, need to will produce BOG to B tanks 3 in operational process and recycle, to reduce
Saturated vapour pressure in B tanks 3 unloads liquid for LNG tank cars and prepares.The valve V8 being located on B supervisors 11, open position are opened at this time
The inlet 52 under the A of A tanks 2 opens the terminal valve of supercharging gasifier 33, opens the valve on BOG pipelines 26, in B tanks 3
BOG pass through B supervisors 11, valve V8, B gas phase mouth 17, the BOG pipelines 26 outside composite can, the valve on BOG pipelines 26, increase
Terminal valve, the LNG of pressure gasifier 33 unload inlet 52 under liquid pipeline 30, lower inlet pipe 24, A, enter under A tanks 2
Portion enters the BOG of A tanks 2 by the LNG of A tanks 2 again since the LNG temperature of A tanks 2 generates less than B tanks 3 temperature of BOG by B tanks 3
Secondary liquefaction, BOG is recycled while the LNG saturated vapour pressures of B tanks 3 are minimized.
LNG unloads workflow specifically, when the LNG of B tanks 3 is in and unloads liquid liquid level, and LNG tank cars, which drive into, unloads parking stall company
It unloads vehicle hose, carries out LNG and unload operation.A tanks 2 are in operating status at this time, and the LNG gasification of A tanks 2 is external during unloading
Gas supply.Since the operating pressure of A tanks 2 is after carrying out 3 saturated vapor pressure of B tanks and adjusting and recycle the BOG of B tanks 3, higher than B tanks 3
Operating pressure needs the saturated vapour pressure for suitably reducing A tanks 2, so as to normally supply before LNG tank cars unload LNG to B tanks 3
Gas.Specifically, opening the valve V7 being located on A supervisors 10, LNG tank car liquid phase valves are opened, open the valve on BOG pipelines 26,
The BOG valves on supercharging sledge are opened, the BOG in A tanks 2 is by A supervisors 10, valve V7 and A the tank gas phase mouth on A supervisors 10
14, the outer BOG pipelines 26 of composite can, the valve on BOG pipelines 26, by booster sledge, then pass through gas phase hose and the LNG slots of unloading
Vehicle liquid valve enters the lower part of LNG tank cars, and through the lower LNG of excess temperature, cooling is liquefied as LNG to BOG again again, when A tanks 2
Interior pressure reaches normal value, LNG tank car pressure reaches unload pressure after, close valve V7, LNG tank car liquid valve, BOG pipes
The BOG valves on valve and booster sledge on road 26.Open inlet 81 on the B of B tanks 3, in opening in inlet pipe 23
Liquid phase valve of unloading on valve and booster sledge starts to unload LNG in B tanks 3, and full LNG is unloaded until 3 liquid level of B tanks reaches the upper limit, closes
Close the valve opened when unloading liquid.At this point, B tanks 3 enter working condition, the gasification that LNG is carried out by B tanks 3 supplies.It opens A tanks and unloads liquid
Remaining LNG is discharged to A tanks 2 by valve, LNG tank cars, and completion entirely unloads liquid process.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of LNG combined types aerating storage tank gasification station, it is characterised in that：Including combined type storage tank and gasification station ontology, gasification
Stand ontology by upper inlet pipe (23), lower inlet pipe (24), LNG outlet tubes road (25) and BOG pipelines (26) with combine
Formula storage tank is connected to；
Gasification station ontology includes unload liquid phase mouth (27), gas phase mouth of unloading (28) and gasifying mouth of unloading (29)；
Gas phase mouth (28) of unloading is connected by BOG pipelines (26) with the A gas phase mouths (14) of combined type storage tank, B gas phase mouths (17)；
Liquid phase mouth of unloading (27) by LNG unload liquid pipeline (30) respectively with upper inlet pipe (23), lower inlet pipe (24) and
It unloads liquid and goes out one end of liquid shortcut pipe (31) and be connected；
The other end of upper inlet pipe (23) is connected with inlet on A (51), the upper inlets of B (81)；
The other end of lower inlet pipe (24) connects with inlet phase (82) under inlet under A (52), B；
It unloads liquid and goes out the other end of liquid shortcut pipe (31) and be connected with air-heating type gasifier (32), air-heating type gasifier (32) connects below
Auxiliary hot pressure regulation metering pipeline；
LNG outlet tubes road (25) one end is connected with unloading liquid and go out liquid shortcut pipe (31), and the other end and medium A outlet, medium B export phase
Even；
Gasifying mouth (29) of unloading is connected by pipeline with supercharging gasifier (33) import, and the outlet of supercharging gasifier (33) passes through pipe
Road is communicated with BOG pipelines (26), and supercharging gasifier (33) import also unloads liquid pipeline (30) by pipeline with LNG and is connected.
2. LNG combined types aerating storage tank gasification station according to claim 1, it is characterised in that：LNG unloads liquid pipeline (30) position
It is provided with check valve on pipeline before being connected with supercharging gasifier (33) import.
3. LNG combined types aerating storage tank gasification station according to claim 1, it is characterised in that：Air-heating type gasifier (32)
Pipeline between pressure piping is main line (34), and heating pipeline (35), heating tube have also been arranged in parallel on main line (34)
The both ends on road (35) are connect with main line (34), and water-bath type heater (36) is connected on heating pipeline (35).
4. LNG combined types aerating storage tank gasification station according to claim 1, it is characterised in that：Air-heating type gasifier (32)
There are two being arranged in parallel.
5. LNG combined types aerating storage tank gasification station according to claim 1, it is characterised in that：Combined type storage tank includes group
It includes inner tank body and outer tank body (1) to close tank and pipeline, composite can, is vacuum interlayer, inner tank body between inner tank body and outer tank body (1)
It is divided into two tanks, respectively A tanks (2) and B tanks (3), spaced setting between A tanks (2) and B tanks (3), the side of composite can is set
It is equipped with and profusely (4), A inlets, medium A outlet (6) is surveyed by the A that pipeline is connected to A tanks (2), the B surveys being connected to B tanks (3) are full
Mouth (7), B inlets, medium B export (9), and valve is both provided on pipeline；
A tanks (2) are connected to by A supervisors (10) with A tank regulating mechanisms, and one end that A supervisors (10) are in A tanks (2) is located at A tanks
(2) top in, B tanks (3) are connected to by B supervisors (11) with B tank regulating mechanisms, and B supervisors (11) are in one end in B tanks (3)
Top in B tanks (3), A is responsible between (10) are responsible for (11) with B and is connected to by connecting tube, and is provided in connecting tube from B
It is responsible for the pneumatic control valve (12) that (11) are responsible for (10) to A；
A tank regulating mechanisms include A diffusion mouths (13) and A gas phase mouths (14), and A diffusion mouths (13) and A gas phase mouths (14) pass through A respectively
Desorption tube and A gas phases pipe are connected with A supervisors (10), and A safety valves (15) are provided on A desorption tubes；
B tank regulating mechanisms include B diffusion mouths (16) and B gas phase mouths (17), and B diffusion mouths (16) and B gas phase mouths (17) pass through B respectively
Desorption tube and B gas phases pipe are connected with B supervisors (11), and B safety valves (18) are provided on B desorption tubes.
6. LNG combined types aerating storage tank gasification station according to claim 5, it is characterised in that：A tanks (2) are passed with A tank liquid levels
Induction device is connected, and A tank liquid level sensing devices include A tank gas phases impulse piping, A tank liquid phases impulse piping, A tank liquid level teletransmission gas phases
Mouth (19), A tank liquid level teletransmission liquid phase mouths (20), the both ends of A tank gas phase impulse piping are separately connected top and the A tank liquid of A tanks (2)
Position teletransmission gas phase mouth (19), the both ends of A tank liquid phase impulse piping are separately connected lower part and the A tank liquid level teletransmission liquid phase mouths of A tanks (2)
(20), it is connected to by connection valve between A tanks gas phase impulse piping and A tank liquid phase impulse piping, A tank gas phase impulse piping and A tanks
Liquid phase impulse piping is located at the pipeline after connection valve and is connected with live liquid level meter, pressure gauge.
7. LNG combined types aerating storage tank gasification station according to claim 5, it is characterised in that：B tanks (3) are passed with B tank liquid levels
Induction device is connected, and B tank liquid level sensing devices include B tank gas phases impulse piping, B tank liquid phases impulse piping, B tank liquid level teletransmission gas phases
Mouth (21), B tank liquid level teletransmission liquid phase mouths (22), the both ends of B tank gas phase impulse piping are separately connected top and the B tank liquid of B tanks (3)
Position teletransmission gas phase mouth (21), the both ends of B tank liquid phase impulse piping are separately connected lower part and the B tank liquid level teletransmission liquid phase mouths of B tanks (3)
(22), it is connected to by connection valve between B tanks gas phase impulse piping and B tank liquid phase impulse piping, B tank gas phase impulse piping and B tanks
Liquid pilot phase pipeline is located at the pipeline after connection valve and is connected with live liquid level meter, pressure gauge.
8. LNG combined types aerating storage tank gasification station according to claim 5, it is characterised in that：A inlets include A enterprising
Inlet (52) under liquid mouth (51) and A, the upper inlets of A (51) connecting pipe connect the top in A tanks (2), inlet (52) under A
Connecting pipe connects the lower part in A tanks (2).
9. LNG combined types aerating storage tank gasification station according to claim 5, it is characterised in that：B inlets include B enterprising
Inlet (82) under liquid mouth (81) and B, the upper inlets of B (81) connecting pipe connect the top in B tanks (3), inlet (82) under B
Connecting pipe connects the lower part in B tanks (3).
10. LNG combined types aerating storage tank gasification station according to claim 5, it is characterised in that：The volume of A tanks (2) is less than
The volume of B tanks (3) and the design pressure of A tanks (2) are more than the design pressure of B tanks (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820600360.9U CN207921739U (en) | 2018-04-25 | 2018-04-25 | A kind of LNG combined types aerating storage tank gasification station |
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| CN201820600360.9U CN207921739U (en) | 2018-04-25 | 2018-04-25 | A kind of LNG combined types aerating storage tank gasification station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506722A (en) * | 2018-04-25 | 2018-09-07 | 天津良华新能源科技有限公司 | A kind of LNG gasification station |
| CN112460476A (en) * | 2019-09-09 | 2021-03-09 | 安瑞科(廊坊)能源装备集成有限公司 | LNG filling device and filling method |
-
2018
- 2018-04-25 CN CN201820600360.9U patent/CN207921739U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506722A (en) * | 2018-04-25 | 2018-09-07 | 天津良华新能源科技有限公司 | A kind of LNG gasification station |
| CN108506722B (en) * | 2018-04-25 | 2023-10-10 | 天津良华新能源科技股份有限公司 | LNG gasification station |
| CN112460476A (en) * | 2019-09-09 | 2021-03-09 | 安瑞科(廊坊)能源装备集成有限公司 | LNG filling device and filling method |
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