CN202082608U - Vaporizer system and control system of LNG (Liquefied Natural Gas) - Google Patents
Vaporizer system and control system of LNG (Liquefied Natural Gas) Download PDFInfo
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- CN202082608U CN202082608U CN2011202077175U CN201120207717U CN202082608U CN 202082608 U CN202082608 U CN 202082608U CN 2011202077175 U CN2011202077175 U CN 2011202077175U CN 201120207717 U CN201120207717 U CN 201120207717U CN 202082608 U CN202082608 U CN 202082608U
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- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 132
- 239000006200 vaporizer Substances 0.000 title claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 17
- 230000001960 triggered effect Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 14
- 239000003345 natural gas Substances 0.000 abstract 7
- 238000002309 gasification Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000013535 sea water Substances 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
- F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0061—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for phase-change applications
- F28D2021/0064—Vaporizers, e.g. evaporators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to vaporizer system and control system of LNG (Liquefied Natural Gas). The vaporizer system comprises an ORV (Open Rack Vaporizer), an SCV (Submerged Combustion Vaporizer) and a mixer, wherein the NG (Natural Gas) heated and vaporized by the ORV and the SCV is mixed in the mixer, the ORV and the SCV are respectively provided with an LNG input pipe, so that the LNG input of the ORV and the LNG input of the SCV can be realized, the ORV and the SCV respectively output heated and vaporized NG into the mixer respectively through own NG output pipes which are connected with the mixer, and the mixer outputs NG through self-own NG output pipe so as to realize NG output. According to the utility model, the operation efficiency and the stability of the vaporizer system can be improved.
Description
Technical field
The utility model relates to the gasification field of low temperature liquid hydrocarbon, particularly relates to gasifier system and the control system thereof of a kind of LNG Liquefied natural gas LNG.
Background technique
LNG Liquefied natural gas (LNG, liquefied natural gas) is a kind of calorific value height, the little high-grade energy of pollution.LNG receiving station receives LNG that the transport by sea of LNG ship comes and with its storage and the gasification commercial plant with outer defeated rock gas (NG) product that obtains gaseous state.
The most frequently used vaporizer has two kinds in the LNG receiving station, utilizes the heat exchange of LNG, NG and seawater to realize the gasification of LNG respectively.These two kinds of vaporizers are respectively: open-shelf vaporizer (0RV, Open Rack Vaporizer) and submerged combustion vaporizer (SCV, Submergerged Combustion Vaporizer), its theory structure are respectively as depicted in figs. 1 and 2.
Among Fig. 1, temperature is that-161 ℃ LNG imports by the LNG supplying tube 101 of ORV, flows along the some aluminum alloy system heat-transfer pipes 102 that communicate with LNG supplying tube 101.Temperature is not less than 5 ℃ seawater and constantly enters bypass channel 104, flow along each heat-transfer pipe 102 from the seawater that wherein overflows, and with heat-transfer pipe 102 in the LNG that flow carry out heat exchange, thereby make the LNG gasification be NG, and through 103 outputs of NG output tube, simultaneously, the seawater of cooling then is discharged from ORV.Because LNG is liquid, and NG is a gas, thereby the LNG supplying tube is usually located at the below of NG output tube, and the power that LNG flows from bottom to top can come from the LNG transfer pump of ORV upstream.As seen, thereby ORV offers LNG with the heat in the seawater to realize its gasification, and this vaporizer relatively simple for structure be not as long as the unlikely decline of temperature that guarantees seawater too much (being no more than 5 ℃) promptly can cause any adverse effect to environment.
Among Fig. 2, combustion-supporting air by after the blower pressurization respectively the air supplying tube 2011 and 2012 by two ends about in the of 203, firing chamber enter, and fully mix with NG supplying tube 2021 and 2022 NG that imported by two ends about in the of 203, firing chamber respectively, burning in firing chamber 203, the high-temperature gas that produces flows along gas transmission pipeline 204, and spray the demineralized water that enters sea water bath 206 (for the metal ion foulings such as calcium magnesium of anti-sealing cause degradation problem under the heat transfer efficiency from some osculums 205 that gas transmission pipeline 204 is arranged in sea water bath 206 bottoms, the water that adds first in the SCV sea water bath requires to be demineralized water) in, thereby demineralized water is heated.The demineralized water that is heated heats by 207 couples of LNG that wherein flow of stainless steel heat-transfer pipe, thereby its gasification is NG, demineralized water cooling simultaneously.As shown in Figure 2, LNG enters heat-transfer pipe 207 by the LNG supplying tube 2071 of SCV, NG output tube 2072 outputs of the NG that gasification obtains by linking to each other with heat-transfer pipe 207.Sea water bath 206 also is the form of bypass channel, and demineralized water enters sea water bath 206 by the demineralized water inlet 2061 of bottom, and discharges from SCV by the form of overflow, thereby or enters sea water bath 206 realization recyclings from demineralized water inlet 2061 again.Above-mentioned firing chamber 203, gas transmission pipeline 204, sea water bath 206, heat-transfer pipe 207 all are positioned at an enclosure, and the gas that overflows from demineralized water is discharged in the atmosphere by the gas output tube 208 of cover top portion.As seen, thereby SCV is the LNG gasification that the mode by high-temperature gas heating demineralized water indirect heating LNG realizes, because products of combustion mainly is carbon dioxide, water, and a spot of nitrogen oxide and carbon monoxide, so the exhausting air of SCV has a small amount of pollution (being disposed to atmosphere by gas output tube 208); In addition, the water and the carbon dioxide that produce can produce acid solution, thereby need regularly to add alkali matter to control the pH value (promptly adjusting the pH value of demineralized water) of water, it is maintained between PH7～9, reach the environmental emission requirement, prevent to cause environmental pollution problem, gas and pollute the discharging of demineralized water can lower in ocean temperature (being lower than 5 ℃) and can not adopt and use under the situation of ORV, and should use, to reduce disposal of pollutants as far as possible less.
Generally, LNG receiving station both had been furnished with ORV, also was furnished with SCV, and priority application ORV realizes the gasification of LNG, when ocean temperature is crossed low or the ORV amount of vaporization is just used SCV can not satisfy the demands the time.And the flow of defeated NG is very big outside the LNG receiving station, thereby needs many ORV of outfit and Duo Tai SCV just can meet the demands.These vaporizers work alone separately, and temperature, the flow of the NG of heating and gasifying are different, and this has had a strong impact on the operational efficiency and the stability of vaporizer.
Summary of the invention
Technical problem to be solved in the utility model provides the gasifier system and the control system thereof of a kind of LNG Liquefied natural gas (LNG), can improve the operational efficiency and the stability of gasifier system.
The technological scheme that the utility model solves the problems of the technologies described above is as follows: the gasifier system of a kind of LNG Liquefied natural gas LNG, and this gasifier system comprises: open-shelf vaporizer ORV, submerged combustion vaporizer SCV, with ORV and the SCV mixer that mixes in self inside of the rock gas NG of heating and gasifying separately; ORV and SCV have separately LNG supplying tube to realize the input of LNG separately; ORV incites somebody to action separately by the NG output tube that links to each other with described mixer separately respectively with SCV, and the NG of heating and gasifying outputs in the described mixer; Described mixer is by outer the failing of the NG output tube realization NG of self.
On the basis of technique scheme, the utility model can also be done following improvement:
Further, described mixer has steel shell, the inside filler wires net of described shell.
In addition, the utility model also provides the control system of the gasifier system of a kind of LNG Liquefied natural gas (LNG), and described vaporizer comprises open-shelf vaporizer ORV, submerged combustion vaporizer SCV, with ORV and the SCV mixer that mixes of the rock gas NG of heating and gasifying separately; ORV and SCV have LNG supplying tube separately; ORV and SCV the NG output tube by separately respectively link to each other with described mixer; Described mixer is by outer the failing of the NG output tube realization NG of self; This system comprises: a temperature transducer of the NG temperature in the NG output tube of detection ORV; Link to each other, receive a controller of the NG temperature in the NG output tube of ORV with a described temperature transducer; On the LNG of ORV supplying tube, with a described controller, link to each other and aperture is subjected to an inflow modulating valve of its control; No. two temperature transducers of the NG temperature in the NG output tube of detection SCV; Link to each other, receive No. two controllers of the NG temperature in the NG output tube of SCV with described No. two temperature transducers; On the LNG of SCV supplying tube, with described No. two controllers, link to each other and aperture is subjected to No. two inflow modulating valve of its control.
Further, also comprise: a flow transducer that links to each other, the LNG flow in the LNG supplying tube of detected ORV is sent to a described controller with a described controller; Link to each other, the LNG flow in the LNG supplying tube of detected SCV sent to No. two flow transducers of described No. two controllers with described No. two controllers.
Further, also comprise:
Link to each other with a described controller, when described controller judges that NG temperature in the NG output tube of ORV is lower than first temperature, triggered by a described controller and the alarm of reporting to the police;
And/or,
Link to each other with described No. two controllers, when described No. two controllers judge that NG temperature in the NG output tube of SCV is lower than second temperature, triggered by described No. two controllers and No. two alarms of reporting to the police.
Further, also comprise: No. three temperature transducers that detect NG temperature in the NG output tube of described mixer; Link to each other, receive No. three controllers of the NG temperature in the NG output tube of described mixer with described No. three temperature transducers; Described No. three controllers link to each other respectively with a described controller, No. two controllers.
Further, also comprise with described No. three controllers and link to each other, when described No. three controllers judge that NG temperature in the NG output tube of described mixer is lower than the 3rd temperature, triggered by described No. three controllers and No. three alarms of reporting to the police.
Further, also comprise: No. four temperature transducers that detect NG temperature in the NG output tube of described mixer; Link to each other, receive No. four controllers of the NG temperature in the NG output tube of described mixer with described No. four temperature transducers; Be positioned at and link to each other on the LNG supplying tube of ORV, with described No. four controllers and on off state is subjected to an inflow switch valve of its control; Be positioned at and link to each other on the LNG supplying tube of SCV, with described No. four controllers and on off state is subjected to No. two inflow switch valves of its control.
Further, also comprise: be positioned at and link to each other on the NG output tube of ORV, with described No. four controllers and on off state is subjected to an outflow switch valve of its control; Be positioned at and link to each other on the NG output tube of SCV, with described No. four controllers and on off state is subjected to No. two outflow switch valves of its control.
Further, also comprise with described No. four controllers and link to each other, when described No. four controllers judge that NG temperature in the NG output tube of described mixer is lower than the 4th temperature, triggered by described No. four controllers and No. four alarms of reporting to the police.
Further, a described inflow switch valve, No. two inflow switch valves, an outflow switch valve, No. two outflow switch valves are electric valve, or are pneumatic valve.
The beneficial effects of the utility model are: in the utility model, the NG that ORV and SCV gasification obtain all outputs in the mixer and mixes fully, thereby realized the transmission of heat, and the NG of different flow cushioned, therefore, from temperature and the flow of the NG of mixer output is steady state value just, and with respect to prior art, the utility model has improved the operational efficiency and the stability of gasifier system.
In addition, the utility model utilizes No. one and No. two temperature transducers detect the NG temperature of ORV and SCV heating and gasifying respectively, and then judge respectively that by No. one and No. two controllers the NG temperature of ORV and SCV heating and gasifying is whether in the scope that allows separately, and the aperture of controlling No. one and No. two inflow modulating valve guarantees that the NG temperature of ORV and SCV heating and gasifying is in the scope that allows separately, can further improve the defeated NG of mixer constant on temperature and flow so outward, further improve the operational efficiency and the stability of gasifier system, saved the energy.
Description of drawings
Fig. 1 is the principle assumption diagram of open-shelf vaporizer (ORV);
Fig. 2 is the principle assumption diagram of submerged combustion vaporizer (SCV);
The gasifier system of the LNG Liquefied natural gas that Fig. 3 provides for the utility model (LNG) and the structural drawing of control system thereof.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.
The gasifier system of the LNG Liquefied natural gas that Fig. 3 provides for the utility model (LNG) and the structural drawing of control system thereof.As shown in Figure 3, this gasifier system comprises: open-shelf vaporizer (ORV), submerged combustion vaporizer (SCV), with ORV and the SCV mixer that mixes in self inside of the rock gas of heating and gasifying (NG) separately.ORV here and the theory structure of SCV are prior art respectively as depicted in figs. 1 and 2.
ORV and SCV have separately LNG Liquefied natural gas (LNG) supplying tube (label is respectively 301 and 302) to realize the input of LNG separately; ORV incites somebody to action separately by the NG output tube (label is respectively 319 and 320) that links to each other with mixer separately respectively with SCV, and the NG of heating and gasifying outputs in the mixer; Mixer is failed by NG output tube 321 the outer of realization NG of self.
Mixer has the shell of steel, has on the shell respectively to enter the mouth with the NG that ORV links to each other with SCV NG output tube separately, and the NG output tube 321 of output NG.The inside filler wires net of shell with mixing and the buffering of the NG that realizes different temperatures, flow to ORV and SCV input, and then is realized the transmission of heat between NG.
This shows, in the utility model, the NG that ORV and SCV gasification obtain all outputs in the mixer and mixes fully, thereby realized the transmission of heat, and the NG of different flow cushioned that it is even to reach temperature, therefore, from temperature and the flow of the NG of mixer output is steady state value just, and with respect to prior art, the utility model has improved the operational efficiency and the stability of gasifier system.
In addition, the vaporizer that utilizes the utility model to provide, can fail the temperature of NG and flow outside all keeps under the stable prerequisite, realize the cooperation of ORV and SCV, need be equipped with the situation of a large amount of ORV and SCV simultaneously with respect to LNG receiving station in the prior art, utilize LNG of the present utility model receiving station only need be equipped with less ORV and SCV, can satisfy the demand of outer defeated NG, this greatly reduces the construction cost and the running cost of LNG receiving station.
In addition, the utility model has also proposed the control system of the gasifier system of a kind of LNG Liquefied natural gas (LNG), this LNG gasifier system is above-mentioned by gasifier system provided by the utility model, and it comprises open-shelf vaporizer (ORV), submerged combustion vaporizer (SCV), with ORV and the SCV mixer that mixes of the rock gas of heating and gasifying (NG) separately.ORV and SCV have LNG supplying tube (respectively shown among Fig. 3 301 and 301) separately, and ORV and SCV the NG output tube by separately (respectively as among Fig. 3 319 with shown in 320) respectively link to each other with mixer; Mixer is failed by NG output tube 321 the outer of realization NG of self.This control system comprises: a temperature transducer 303 of the NG temperature in the NG output tube 319 of detection ORV; Link to each other, receive a controller 305 of the NG temperature in the NG output tube 319 of ORV with temperature transducer 303; On the LNG of ORV supplying tube 301, with controller 305, link to each other and aperture is subjected to an inflow modulating valve 307 of its control; No. two temperature transducers 304 of the NG temperature in the NG output tube 320 of detection SCV; Link to each other, receive No. two controllers 306 of the NG temperature in the NG output tube 320 of SCV with No. two temperature transducers 304; On the LNG of SCV supplying tube 302, with No. two controllers 306, link to each other and aperture is subjected to No. two inflow modulating valve 308 of its control.
Utilize this control system, can realize the monitoring of the temperature of the NG that gasification obtains to ORV and SCV, and then control the aperture of an inflow modulating valve 307 and No. two inflow modulating valve 308 respectively by controller 305 and No. two controllers 306, with the temperature that guarantees the NG that ORV and SCV are gasified to be obtained in allowed limits.
Concrete, the working principle of this control system is:
The temperature of judging No. one temperature transducer detecting when controller (being the temperature of the NG that obtains of ORV gasification) is when being lower than setting value, send aperture to an inflow modulating valve and reduce signal, the aperture of an inflow modulating valve is reduced, like this, the flow of the LNG that imports in ORV reduces thereupon, this means per unit volume NG the increase of absorbent heat, thereby the temperature of the NG of ORV output will improve gradually.Simultaneously, because the temperature of the NG of ORV gasification output will be lower than the temperature of the NG of SCV gasification output, the LNG of input ORV reduces, the NG flow of ORV output also reduces thereupon, thereby the temperature of the NG that exports of mixer also can improve gradually, and this helps satisfying the needs of defeated NG stability outside client's demand and the LNG receiving station.
Equally, the temperature of judging No. two temperature transducer detecting when No. two controllers (being the temperature of the NG that obtains of SCV gasification) is when being lower than setting value, send aperture to No. two inflow modulating valve and reduce signal, the aperture of No. two inflow modulating valve is reduced, like this, the flow of the LNG that imports in SCV reduces thereupon, and the absorbent heat of the NG of the per unit volume of SCV heating and gasifying institute also increases to some extent, thereby the temperature of the NG of SCV output will rise gradually and meets the demands.
As shown in Figure 3, this control system also comprises: link to each other, the LNG flow in the LNG supplying tube 301 of detected ORV is sent to a flow transducer 309 of a controller 305 with controller 305; Link to each other, the LNG flow in the LNG supplying tube 302 of detected SCV sent to No. two flow transducers 310 of No. two controllers 306 with No. two controllers 306.
As seen, this control system also can will be imported the LNG flow control of ORV and SCV in predetermined scope.Concrete working principle is as follows:
When a controller judges that the measured LNG flow (promptly importing the LNG flow of ORV) of flow transducer surpasses the setting peak, send aperture to an inflow modulating valve and reduce signal, thereby reduce the aperture of an inflow modulating valve, and then reduce the LNG flow of input ORV; Equally, when a controller judges that the measured LNG flow (promptly importing the LNG flow of ORV) of flow transducer is lower than the setting minimum, send aperture to an inflow modulating valve and increase signal, thereby increase the aperture of bigger inflow modulating valve, and then the LNG flow of raising input ORV, like this, the utility model has guaranteed that the LNG flow of input ORV remains between predetermined lowest value and the predetermined peak, and then has guaranteed the NG temperature of ORV output and the stability of flow.
Similarly, when No. two controllers judge that No. two measured LNG flows (promptly importing the LNG flow of SCV) of flow transducer surpass the setting peak, send aperture to No. two inflow modulating valve and reduce signal, thereby reduce the aperture of No. two inflow modulating valve, and then reduce the LNG flow of input SCV; Equally, when No. two controllers judge that No. two measured LNG flows (promptly importing the LNG flow of SCV) of flow transducer are lower than the setting minimum, send aperture to No. two inflow modulating valve and increase signal, thereby increase the aperture of No. two inflow modulating valve, and then the LNG flow of raising input SCV, like this, the utility model has guaranteed that the LNG flow of input SCV remains between predetermined lowest value and the predetermined peak, and then has guaranteed the NG temperature of SCV output and the stability of flow.
As shown in Figure 3, this control system also comprises: No. three temperature transducers 311 of NG temperature in the NG output tube 321 of detection mixer; Link to each other, receive No. three controllers 313 of the NG temperature in the NG output tube 321 of mixer with No. three temperature transducers 311; No. three controllers 313 and controller 305, No. two controllers 306 link to each other respectively.
Utilize this control system, can guarantee that the temperature of the NG that mixer is exported remains in the prespecified range.Concrete working principle is as follows:
When the temperature of defeated NG outside the mixers that No. three controllers are judged No. three temperature transducer was detected (being the NG temperature in the NG output tube of mixer) when being lower than default minimum (as-2 ℃), defeated NG temperature is crossed low signal outside a controller and No. two controllers transmissions respectively, then a controller is according to should outer defeated NG temperature crossing low signal, send aperture to an inflow modulating valve and reduce signal, thereby reduce the aperture of an inflow modulating valve, and then the LNG flow that reduces input ORV is failed the temperature of NG outward to improve mixer, simultaneously, No. two controller is crossed low signal according to outer defeated NG temperature, send aperture to No. two inflow modulating valve and reduce signal, thereby reduce the aperture of No. two inflow modulating valve, and then reduce to import the LNG flow of SCV, like this, the flow of the NG of SCV output also reduces to improve the mixer temperature of defeated NG outward thereupon, because the temperature of the NG of SCV heating and gasifying is than the NG temperature height of ORV heating and gasifying, therefore, the increase of SCV output temperature helps the mixer raising of defeated NG temperature outward more.
When the temperature of defeated NG outside the mixers that No. three controllers are judged No. three temperature transducer was detected (being the NG temperature in the NG output tube of mixer) is higher than default peak, outside a controller and No. two controllers transmissions, fail the too high signal of NG temperature respectively, then a controller is according to failing the too high signal of NG temperature outward, send aperture to an inflow modulating valve and increase signal, thereby increase the aperture of bigger inflow modulating valve, the LNG flow that improves input ORV to be reducing the NG flow of its output, and then reduces the mixer temperature of defeated NG outward.Simultaneously, No. two controllers are according to the outer defeated too high signal of NG temperature, send aperture to No. two inflow modulating valve and increase signal, thereby increase the aperture of No. two inflow modulating valve, increase the flow of input SCV, thereby reduce the flow of SCV output NG, this helps the mixer reduction of the temperature of defeated NG outward, satisfies and saves the operation energy consumption of receiving station when NG fails temperature requirement outward.
Control system shown in Figure 3 also comprises: No. four temperature transducers 312 of NG temperature in the NG output tube 321 of detection mixer; Link to each other, receive No. four controllers 314 of the NG temperature in the NG output tube 321 of mixer with No. four temperature transducers 312; Be positioned on the LNG supplying tube 301 of ORV, link to each other and on off state is subjected to an inflow switch valve 315 of its control with No. four controllers 314; Be positioned on the LNG supplying tube 302 of SCV, link to each other and on off state is subjected to No. two inflow switch valves 316 of its control with No. four controllers 314.
In addition, this control system can also comprise: be positioned on the NG output tube 319 of ORV, link to each other with No. four controllers 314 and on off state is subjected to an outflow switch valve 317 of its control; Be positioned on the NG output tube 320 of SCV, link to each other and on off state is subjected to No. two outflow switch valves 318 of its control with No. four controllers 314.
As seen, under the situation of vaporizer work (outside the temperature of defeated NG etc. can not be operated in the preset range) out of control as mixer, this control system can also stop the work of vaporizer by force by independently controller (No. four controllers) and switch valve, to guarantee the work safety of LNG receiving station.Concrete working principle is as follows:
When No. four controllers judge that the temperature (i.e. NG temperature in the mixer NG output tube that No. four temperature transducer detected) of defeated NG outside the mixer is when being lower than dangerous temperature minimum (as-10 ℃), can send pick-off signal to an inflow switch valve and No. two inflow switch valves respectively, like this, an inflow switch valve and No. two inflow switch valves of originally being in opening state are transformed into off state, thereby stop in ORV and SCV, importing LNG, like this, ORV and SCV just can not gasify and obtain NG, mixer also just can not be failed NG outward gradually, thereby has guaranteed the work safety of LNG receiving station.Wait for a period of time (as 1 minute etc.) quietly, make that remaining NG outputs in the mixer gradually among ORV and the SCV, No. four controller can also send pick-off signal respectively to an outflow switch valve and No. two outflow switch valves, make an outflow switch valve and No. two outflow switch valves of being in opening state originally also be transformed into off state, thereby stop the output of the NG of ORV and SCV heating and gasifying, thoroughly make mixer lose the NG source, finally stop its output NG, for follow-up service work provides condition.
Modulating valve in the utility model (as an inflow modulating valve among Fig. 3 307, No. two inflow modulating valve 308), switch valve (as an inflow switch valve among Fig. 3 315, No. two inflow switch valves 316, outflow switch valve 317, No. two outflow switch valves 318), all can adopt the form of electric valve, also can adopt the form of pneumatic valve.
Above-mentioned control system is all come work by automatic control mode, does not have artificial participation fully.If wherein some parts (as an inflow switch valve, No. two inflow modulating valve etc.) are malfunctioning, or certain bar control link breaks, can't achieve effective control, and this defective can remedy by the mode of manual tune, for this reason, this control system has also comprised it must being the alarm of quantity.
For example, alarm can be set No. one, it links to each other with a controller 305 among Fig. 3, when controller 305 judges that NG temperature in the NG output tube 319 of ORV is lower than first temperature (as 0 ℃), and alarm is triggered by controller 305 and reports to the police.
Alarm also can be set No. two, and it links to each other with No. two controllers 306, when No. two controllers 306 judge that NG temperature in the NG output tube 320 of SCV is lower than second temperature (as 0 ℃), and No. two alarms can be triggered by No. two controllers 306 and report to the police.
No. three alarms that link to each other with No. three controllers 313 can also be set, and when No. three controllers 313 judged that NG temperature in the NG output tube 321 of mixers is lower than the 3rd temperature (as-2 ℃), No. three alarms can be triggered by No. three controllers 313 and report to the police.
In addition, No. four alarms that link to each other with No. four controllers 314 can also be set, when No. four controllers 314 judged that NG temperature in the NG output tube 321 of mixers is lower than the 4th temperature (as-10 ℃), No. four alarms were triggered by No. four controllers 314 and report to the police.
That each above-mentioned alarm all can adopt is luminous, sound the alarm etc. as the form of alarm signal.Utilize this control system, the staff can receive under the situation of alarm signal, in time checks the automatic disposing condition of control system, can not correctly handle the present situation automatically as finding control system, then can come timely elimination problem manually, prevent danger.
This shows, the utlity model has following advantage:
(1) in the utility model, the NG that ORV and SCV gasification obtain all outputs in the mixer and mixes fully, thereby realized the transmission of heat, and the NG of different flow cushioned, therefore, even from the temperature of the NG of mixer output, and temperature and flow are steady state value just, with respect to prior art, the utility model has improved the operational efficiency and the stability of gasifier system.
(2) vaporizer that utilizes the utility model to provide, can fail the temperature of NG and flow outside all keeps under the stable prerequisite, realize the cooperation of ORV and SCV, need be equipped with the situation of a large amount of ORV and SCV simultaneously with respect to LNG receiving station in the prior art, utilize LNG of the present utility model receiving station only need be equipped with less ORV and SCV, can satisfy the demand of outer defeated NG, this greatly reduces the construction cost and the running cost of LNG receiving station.
(3) the utility model utilizes No. one and No. two temperature transducers detect the NG temperature of ORV and SCV heating and gasifying respectively, and then judge respectively that by No. one and No. two controllers the NG temperature of ORV and SCV heating and gasifying is whether in the scope that allows separately, and the aperture of controlling No. one and No. two inflow modulating valve guarantees that the NG temperature of ORV and SCV heating and gasifying is in the scope that allows separately, can further improve the defeated NG of mixer constant on temperature and flow so outward, further improve the operational efficiency and the stability of vaporizer.
(4) utilize this control system, the staff can receive under the situation of alarm signal, in time checks the automatic disposing condition of control system, can not correctly handle the present situation automatically as finding control system, then can come timely elimination problem manually, prevent danger.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (11)
1. the gasifier system of a LNG Liquefied natural gas LNG is characterized in that, this gasifier system comprises: open-shelf vaporizer ORV, submerged combustion vaporizer SCV, with ORV and the SCV mixer that mixes in self inside of the rock gas NG of heating and gasifying separately; ORV and SCV have separately LNG supplying tube to realize defeated 2 of LNG separately; ORV incites somebody to action separately by the NG output tube that links to each other with described mixer separately respectively with SCV, and the NG of heating and gasifying outputs in the described mixer; Described mixer is by outer the failing of the NG output tube realization NG of self.
2. gasifier system according to claim 1 is characterized in that described mixer has steel shell, the inside filler wires net of described shell.
3. the control system of the gasifier system of a LNG Liquefied natural gas LNG, described vaporizer comprise open-shelf vaporizer ORV, submerged combustion vaporizer SCV, with ORV and the SCV mixer that mixes of the rock gas NG of heating and gasifying separately; ORV and SCV have LNG supplying tube separately; ORV and SCV the NG output tube by separately respectively link to each other with described mixer; Described mixer is by outer the failing of the NG output tube realization NG of self; It is characterized in that this system comprises: a temperature transducer of the NG temperature in the NG output tube of detection ORV; Link to each other, receive a controller of the NG temperature in the NG output tube of ORV with a described temperature transducer; On the LNG of ORV supplying tube, with a described controller, link to each other and aperture is subjected to an inflow modulating valve of its control; No. two temperature transducers of the NG temperature in the NG output tube of detection SCV; Link to each other, receive No. two controllers of the NG temperature in the NG output tube of SCV with described No. two temperature transducers; On the LNG of SCV supplying tube, with described No. two controllers, link to each other and aperture is subjected to No. two inflow modulating valve of its control.
4. control system according to claim 3 is characterized in that, also comprises: a flow transducer that links to each other, the LNG flow in the LNG supplying tube of detected ORV is sent to a described controller with a described controller; Link to each other, the LNG flow in the LNG supplying tube of detected SCV sent to No. two flow transducers of described No. two controllers with described No. two controllers.
5. control system according to claim 3 is characterized in that, also comprises:
Link to each other with a described controller, when described controller judges that NG temperature in the NG output tube of ORV is lower than first temperature, triggered by a described controller and the alarm of reporting to the police;
And/or,
Link to each other with described No. two controllers, when described No. two controllers judge that NG temperature in the NG output tube of SCV is lower than second temperature, triggered by described No. two controllers and No. two alarms of reporting to the police.
6. control system according to claim 3 is characterized in that, also comprises: No. three temperature transducers that detect NG temperature in the NG output tube of described mixer; Link to each other, receive No. three controllers of the NG temperature in the NG output tube of described mixer with described No. three temperature transducers; Described No. three controllers link to each other respectively with a described controller, No. two controllers.
7. control system according to claim 6, it is characterized in that, also comprise with described No. three controllers linking to each other, when described No. three controllers judge that NG temperature in the NG output tube of described mixer is lower than the 3rd temperature, triggered by described No. three controllers and No. three alarms of reporting to the police.
8. control system according to claim 3 is characterized in that, also comprises: No. four temperature transducers that detect NG temperature in the NG output tube of described mixer; Link to each other, receive No. four controllers of the NG temperature in the NG output tube of described mixer with described No. four temperature transducers; Be positioned at and link to each other on the LNG supplying tube of ORV, with described No. four controllers and on off state is subjected to an inflow switch valve of its control; Be positioned at and link to each other on the LNG supplying tube of SCV, with described No. four controllers and on off state is subjected to No. two inflow switch valves of its control.
9. control system according to claim 8 is characterized in that, also comprises: be positioned at and link to each other on the NG output tube of ORV, with described No. four controllers and on off state is subjected to an outflow switch valve of its control; Be positioned at and link to each other on the NG output tube of SCV, with described No. four controllers and on off state is subjected to No. two outflow switch valves of its control.
10. according to Claim 8 or 9 described control system, it is characterized in that, also comprise with described No. four controllers linking to each other, when described No. four controllers judge that NG temperature in the NG output tube of described mixer is lower than the 4th temperature, triggered by described No. four controllers and No. four alarms of reporting to the police.
11. control system according to claim 9 is characterized in that, a described inflow switch valve, No. two inflow switch valves, an outflow switch valve, No. two outflow switch valves are electric valve, or are pneumatic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202077175U CN202082608U (en) | 2011-06-20 | 2011-06-20 | Vaporizer system and control system of LNG (Liquefied Natural Gas) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202077175U CN202082608U (en) | 2011-06-20 | 2011-06-20 | Vaporizer system and control system of LNG (Liquefied Natural Gas) |
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| CN202082608U true CN202082608U (en) | 2011-12-21 |
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| CN2011202077175U Expired - Lifetime CN202082608U (en) | 2011-06-20 | 2011-06-20 | Vaporizer system and control system of LNG (Liquefied Natural Gas) |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103438747A (en) * | 2013-08-13 | 2013-12-11 | 中国船舶重工集团公司第七二五研究所 | Seawater distributor for open rack vaporizer and use method |
| CN103629693A (en) * | 2013-12-02 | 2014-03-12 | 北京市燃气集团有限责任公司 | Control system and control method of LNG immersion combustion gasifier |
| CN105928003A (en) * | 2016-04-13 | 2016-09-07 | 中国石油集团渤海石油装备制造有限公司 | Control method for regulating fuel supply of SCV combustor |
| CN106225550A (en) * | 2016-07-22 | 2016-12-14 | 甘肃蓝科石化高新装备股份有限公司 | A kind of open-frame type gasifier sea water distribution system |
| CN107107991A (en) * | 2014-12-16 | 2017-08-29 | 韩国Gas公社 | Sea water supply device for open-frame type gasifier |
| CN107631172A (en) * | 2017-10-27 | 2018-01-26 | 中国寰球工程有限公司 | The LNG gasification device of Waste Heat Reuse |
| WO2021081985A1 (en) * | 2019-11-01 | 2021-05-06 | Cryostar Sas | Vaporizer for vaporization of liquefied gases and method of vaporizing liquefied gas |
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2011
- 2011-06-20 CN CN2011202077175U patent/CN202082608U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438747A (en) * | 2013-08-13 | 2013-12-11 | 中国船舶重工集团公司第七二五研究所 | Seawater distributor for open rack vaporizer and use method |
| CN103438747B (en) * | 2013-08-13 | 2015-09-02 | 中国船舶重工集团公司第七二五研究所 | A kind of seawater distributor using method for open-frame type gasifier |
| CN103629693A (en) * | 2013-12-02 | 2014-03-12 | 北京市燃气集团有限责任公司 | Control system and control method of LNG immersion combustion gasifier |
| CN103629693B (en) * | 2013-12-02 | 2016-03-30 | 北京市燃气集团有限责任公司 | The control system of LNG immersion combustion gasifier and control method |
| CN107107991A (en) * | 2014-12-16 | 2017-08-29 | 韩国Gas公社 | Sea water supply device for open-frame type gasifier |
| CN107107991B (en) * | 2014-12-16 | 2019-05-14 | 韩国Gas公社 | Sea water supply device for open-frame type gasifier |
| CN105928003A (en) * | 2016-04-13 | 2016-09-07 | 中国石油集团渤海石油装备制造有限公司 | Control method for regulating fuel supply of SCV combustor |
| CN106225550A (en) * | 2016-07-22 | 2016-12-14 | 甘肃蓝科石化高新装备股份有限公司 | A kind of open-frame type gasifier sea water distribution system |
| CN107631172A (en) * | 2017-10-27 | 2018-01-26 | 中国寰球工程有限公司 | The LNG gasification device of Waste Heat Reuse |
| WO2021081985A1 (en) * | 2019-11-01 | 2021-05-06 | Cryostar Sas | Vaporizer for vaporization of liquefied gases and method of vaporizing liquefied gas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Bai Gailing Inventor after: Zhang Minghui Inventor after: Wang Hong Inventor after: Sun Jinying Inventor after: Li Chan Inventor after: Niu Zhanchuan Inventor after: Zhang Peng Inventor after: Yang Na Inventor after: Li Peiyue Inventor after: Li Cheng Inventor before: Bai Gailing Inventor before: Wang Hong Inventor before: Sun Jinying Inventor before: Li Chan Inventor before: Niu Zhanchuan Inventor before: Zhang Peng Inventor before: Yang Na |
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| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160714 Address after: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee after: China Huanqiu Engineering Co. Patentee after: No.725 Inst. China Shipping Heavy Industry Group Corp. Address before: 100029 Beijing city Chaoyang District cherry Garden Street No. 7 Patentee before: China Huanqiu Engineering Co. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee after: China Global Engineering Co. Ltd. Patentee after: No.725 Inst. China Shipping Heavy Industry Group Corp. Address before: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee before: China Huanqiu Engineering Co. Patentee before: No.725 Inst. China Shipping Heavy Industry Group Corp. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111221 |