CN104728599A - Solar energy driven spraying liquefied natural gas gasification system and solar energy driven spraying liquefied natural gas gasification method - Google Patents

Solar energy driven spraying liquefied natural gas gasification system and solar energy driven spraying liquefied natural gas gasification method Download PDF

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Publication number
CN104728599A
CN104728599A CN201510131426.5A CN201510131426A CN104728599A CN 104728599 A CN104728599 A CN 104728599A CN 201510131426 A CN201510131426 A CN 201510131426A CN 104728599 A CN104728599 A CN 104728599A
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valve
heat
heat exchanger
natural gas
gasification
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CN104728599B (en
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熊亚选
栗博
史建峰
刘蓉
王刚
陈红兵
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Beijing Younaite Gas Engineering Technology Co., Ltd.
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Beijing University of Civil Engineering and Architecture
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The invention provides a solar energy driven spraying liquefied natural gas gasification system and a solar energy driven spraying liquefied natural gas gasification method. The system comprises a solar heat collection and heat storage unit, and a spraying type liquefied natural gas gasification unit, wherein the solar heat collection and heat storage unit is connected with the spraying type liquefied natural gas gasification unit by a first heat exchanger and a second heat exchanger respectively; and the spraying type liquefied natural gas gasification unit is connected to a high-pressure fuel gas pipeline. According to the gasification system provided by the invention, collected solar energy is directly used for driving the spraying type liquefied natural gas to be gasified, so that non-renewable fossil energy can be saved and the gasification speed of the liquefied natural gas is also improved.

Description

A kind of gasification system of steam ejection liquefaction rock gas of Driven by Solar Energy and method thereof
Technical field
The present invention relates to liquefied natural gas gasifying field, be specifically related to a kind of gasification system and method thereof of steam ejection liquefaction rock gas of Driven by Solar Energy.
Background technique
The inevitable consumption along with the energy of economic fast development, and the energy-saving horizontal that the reach of science inevitable requirement is more and more higher (especially for the saving of non-renewable resources).China is as second largest production of energy state and country of consumption in the world, need the LNG Liquefied natural gas that import is a large amount of every year, the gasification of LNG Liquefied natural gas relates to gas-liquid phase transition, and gas-liquid phase transition needs to consume a large amount of heat energy and could be gasified and be heated to required fuel gas temperature.
The gasifying method of current LNG Liquefied natural gas mainly comprises air temperature type, open-shelf, submerged combustion and with intermediate heat medium-type gasifying method; Wherein:
(1) air temperature type gasifying method is using air as heat source, and because air side heat-transfer coefficient is very low, therefore heating load degree of amplitude modulation is smaller;
(2) open-shelf gasifying method utilizes seawater as thermal source, and heating load can carry out free adjusting, but can cause serious impact to the microenvironment in seawater for a long time;
(3) submerged combustion gasifying method adopts the mode of " the heated by natural gas water of combustion gasification, water heats liquefied natural gas again " to gasify to LNG Liquefied natural gas, not only heating load degree of amplitude modulation is less, and need a large amount of rock gas that burns, be unfavorable for energy-conservation;
(4) be adopt seawater as heat source with intermediate heat medium-type gasifying method, this kind of mode must adopt complicated intermediate heat medium and system, and heating load adjustment is complicated, is unfavorable for cost savings.
Summary of the invention
In view of this, the invention provides a kind of gasification system and method thereof of steam ejection liquefaction rock gas of Driven by Solar Energy, be intended to save the energy consumption for non-renewable resources in natural gas gasifying process.
The technical solution used in the present invention is specially:
A kind of gasification system of steam ejection liquefaction rock gas of Driven by Solar Energy, comprise solar energy heat-collecting heat-storage unit and jet-type liquefaction weather gasification unit, described solar energy heat-collecting heat-storage unit is connected by First Heat Exchanger, the second heat exchanger weather gasification unit that liquefies with described jet-type respectively, and described jet-type liquefaction weather gasification unit is connected to high-pressure gas pipeline.
In the gasification system of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, described solar energy heat-collecting heat-storage unit comprises heat storage can, solar thermal collector, First Heat Exchanger and the second heat exchanger, described heat storage can is connected with described solar thermal collector through high temperature pump, and described solar thermal collector is connected to described heat storage can through described First Heat Exchanger, described second heat exchanger successively.
In the gasification system of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, also comprise the first valve sets, described first valve sets comprises the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve and the 6th valve; Wherein: described first valve is located at the first end of described solar thermal collector, described second valve is located at the second end of described solar thermal collector, and described 4th valve is located between described first valve and the second valve; Described second valve, described 4th valve are connected with described First Heat Exchanger through described 3rd valve respectively, and described second valve, described 4th valve are also connected to described heat storage can through described 5th valve respectively; Described second heat exchanger is connected with described heat storage can through described 6th valve.
In the gasification system of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, described jet-type liquefaction weather gasification unit comprises liquified natural gas tank, First Heat Exchanger, sparger and the second heat exchanger, described liquified natural gas tank is connected with described First Heat Exchanger through liquefied natural gas pump, described First Heat Exchanger is connected with described second heat exchanger through described sparger, and described second heat exchanger is connected to described high-pressure gas pipeline.
In the gasification system of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, also comprise the second valve sets, described second valve sets comprises the 7th valve, described pressure maintaining valve and the 8th valve, described 7th valve is located between described liquified natural gas tank and described liquefied natural gas pump, described 8th valve is located between described liquified natural gas tank and described sparger, and described pressure maintaining valve is located between described sparger and described liquified natural gas tank.
A kind of gasifying method of steam ejection liquefaction rock gas of Driven by Solar Energy, be included in the heat exchange step in solar energy heat-collecting heat-storage unit and the gasification step in jet-type liquefaction weather gasification unit, heat accumulation step is connected with gasification step respectively mutually by First Heat Exchanger, the second heat exchanger, and the rock gas after gasification step passes to high-pressure gas pipeline.
In the gasifying method of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, described heat exchange step is specially:
Under the effect of high temperature pump, heat-conducting work medium in heat reservoir enters in solar thermal collector through the first valve and heats, heat-conducting work medium after heating enters in First Heat Exchanger, the second heat exchanger through the second valve, the 3rd valve successively, heat exchange is carried out with LNG Liquefied natural gas, through heat exchange, LNG Liquefied natural gas endothermic disintergration is the gaseous natural gas of uniform temperature, and the heat-conducting work medium after heat release returns heat reservoir through the 6th valve.
In the gasifying method of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, described heat exchange step also comprises:
When the heat that solar thermal collector absorbs is greater than the heat summation of First Heat Exchanger and the second heat exchanger needs, 4th valve closing, makes unnecessary heat be stored into heat reservoir in the mode of high-temperature heat-conductive working medium by regulating the flow of high temperature pump and the aperture of the 5th valve;
When solar thermal collector absorb heat be less than or equal to First Heat Exchanger and the second heat exchanger needs heat summation and more than limiting value time, 5th valve closing, by regulating the flow of high temperature pump and the aperture of the 4th valve, First Heat Exchanger and the second heat exchanger is made to obtain required heat respectively;
When the heat that solar thermal collector absorbs limiting value and following time, closing the first valve, the second valve and the 5th valve, open the 4th valve, by regulating the flow of high temperature pump, making First Heat Exchanger and the second heat exchanger obtain required heat respectively.
In the gasifying method of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, described gasification step comprises:
Under the effect of liquefied natural gas pump, LNG Liquefied natural gas in liquified natural gas tank enters heat exchange in First Heat Exchanger through the 7th valve, high pressure superheater rock gas is converted into after heat exchange, high pressure superheater rock gas mixes in jet pump with the low pressure liquefied natural gas of coming through the 7th valve injection from liquified natural gas tank, forms high-pressure natural gas.
In the gasifying method of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, described gasification step also comprises:
The high-pressure natural gas be mixed to form is divided into two-part: a part is after the second heat exchanger heat exchange, and send into high-pressure gas pipeline after being heated to setting value, another part returns liquified natural gas tank after pressure maintaining valve pressure regulation.
The beneficial effect that the present invention produces is:
The gasification system of the steam ejection liquefaction rock gas of Driven by Solar Energy of the present invention is by combining the sustainable stable heating achieving solar energy with heat reservoir by discontinuous solar energy heating, realizing also to impact environment while LNG Liquefied natural gas stablizes gasification, save non-renewable natural gas resource;
System adopts sparger as the vaporizer of LNG Liquefied natural gas, and in sparger, carry out direct contact type mass-and heat-transfer, significantly improve the speed of vaporizer, therefore the loss of heat from heat source is minimized;
The structure of system is simple, easy to process, low cost of manufacture, has both been applicable to small-sized skid-mounted gas filling station, has also can be used for the liquefied natural gas gasifying of big-and-middle-sized gas station.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, more completely the present invention can be understood better.Accompanying drawing described herein is used to provide a further understanding of the present invention, and embodiment and explanation thereof, for explaining the present invention, do not form inappropriate limitation of the present invention.
Fig. 1 is the structural representation of the gasification system of the steam ejection liquefaction rock gas of a kind of Driven by Solar Energy of the present invention.
In figure: 1, heat storage can 2, high temperature pump 3, first valve 4, solar thermal collector 5, second valve 6, the 3rd valve 7, First Heat Exchanger 8, second heat exchanger 9, the 4th valve 10, the 5th valve 11, the 6th valve 12, liquified natural gas tank 13, the 7th valve 14, liquefied natural gas pump 15, sparger 16, pressure maintaining valve 17, the 8th valve.
Embodiment
Below in conjunction with drawings and Examples, technological scheme of the present invention is described in further detail.
The gasification system of the steam ejection liquefaction rock gas of a kind of Driven by Solar Energy as shown in Figure 1, comprise solar energy heat-collecting heat-storage unit and jet-type liquefaction weather gasification unit, solar energy heat-collecting heat-storage unit is connected by First Heat Exchanger, the second heat exchanger 8 weather gasification unit that liquefies with jet-type respectively, and jet-type liquefaction weather gasification unit is connected to high-pressure gas pipeline; Wherein:
Solar energy heat-collecting heat-storage unit mainly comprises heat storage can 1, solar thermal collector 4, First Heat Exchanger 7, second heat exchanger 8, first valve sets and corresponding pipeline, and the first valve sets comprises the first valve 3, second valve 5, the 3rd valve 6, the 4th valve 9, the 5th valve 10 and the 6th valve 11; Heat storage can 1 is connected with solar thermal collector 4 through high temperature pump 2, and solar thermal collector 4 is connected to heat storage can 1 through First Heat Exchanger 7, second heat exchanger 8 successively; In first valve sets:
First valve 3 is located at the first end of solar thermal collector 4, and the second valve 5 is located at the second end of solar thermal collector 4, and the 4th valve 9 is located between the first valve 3 and the second valve 5; Second valve 5, the 4th valve 9 are connected with First Heat Exchanger 7 through the 3rd valve 6 respectively, and the second valve 5, the 4th valve 9 are also connected to heat storage can 1 through the 5th valve 10 respectively; Second heat exchanger 8 is connected with heat storage can 1 through the 6th valve 11.
Jet-type liquefaction weather gasification unit mainly comprises liquified natural gas tank 12, First Heat Exchanger 7, sparger 15, second heat exchanger 8 and the second valve sets and corresponding pipeline, second valve sets comprises the 7th valve 13, pressure maintaining valve 16 and the 8th valve 17, liquified natural gas tank 12 is connected with First Heat Exchanger 7 through liquefied natural gas pump 14, First Heat Exchanger 7 is connected with the second heat exchanger 8 through sparger 15, and the second heat exchanger 8 is connected to high-pressure gas pipeline;
In second valve sets:
7th valve 13 is located between liquified natural gas tank 12 and liquefied natural gas pump 14, and the 8th valve 17 is located between liquified natural gas tank 12 and sparger 15, and pressure maintaining valve 16 is located between sparger 15 and liquified natural gas tank 12.
In the gasification system of the steam ejection liquefaction rock gas of above-mentioned Driven by Solar Energy, the workflow of solar energy heat-collecting heat-storage unit and jet-type liquefaction weather gasification unit is respectively:
The workflow of solar energy heat-collecting heat-storage unit:
Conduction oil in heat reservoir 1 enters in solar thermal collector 4 through the first valve 3 and is heated to 320 DEG C under the effect of high temperature pump 2, then First Heat Exchanger 7 heats liquefied natural gas is entered to gasification through the second valve 5 and the 3rd valve 6, gaseous natural gas temperature reaches 300 DEG C, then conduction oil enters the rock gas after the second heat exchanger 8 heating and gasifying, and temperature is reduced to the conduction oil after below 100 DEG C and returns heat reservoir 1 through the 6th valve 11.When the heat that solar thermal collector 4 absorbs is greater than the total amount of heat of First Heat Exchanger 7 and the second heat exchanger 8 needs, close the 4th valve 9, regulate the aperture of the 5th valve 10, make unnecessary heat be stored into heat reservoir 1 in the mode of high temperature heat conductive oil.When the total amount of heat that the heat that solar thermal collector 4 absorbs needs lower than First Heat Exchanger 7 and the second heat exchanger 8, close the 5th valve 10, regulate the aperture of the 4th valve 9, regulate the flow of high temperature pump 2, make First Heat Exchanger 7 and the second heat exchanger 8 obtain the total amount of heat needed, when the heat that solar thermal collector 4 absorbs close to zero time, cut off the first valve 3, second valve 5 and the 5th valve 10, regulate the flow of high temperature pump 2, make First Heat Exchanger 7 and the second heat exchanger 8 obtain the total amount of heat needed.
The workflow of jet-type liquefaction weather gasification unit:
LNG Liquefied natural gas in liquified natural gas tank 12 enters in First Heat Exchanger 7 through the 7th valve 13 and liquefied natural gas pump 14 and gasifies under the effect of liquefied natural gas pump 14, be superheated to temperature 280-300 DEG C, more than pressure 5.0MPa, become high pressure superheater rock gas, then high pressure superheater rock gas enters in jet pump 15 and sprays, carry out contact heat transfer mass transfer with the low pressure liquefied natural gas of coming from the 7th valve injection and become high-pressure natural gas, then most of high-pressure natural gas enters the second heat exchanger 8 and is heated to more than 0 DEG C and sends into high-pressure gas pipeline, another fraction high-pressure natural gas returns liquified natural gas tank 12 after pressure maintaining valve 16 pressure regulation, keep pressure stability in liquified natural gas tank 12.
Heat by First Heat Exchanger 7 the low-temp low-pressure LNG Liquefied natural gas that the High Temperature High Pressure prevention of natural gas ejected that obtains comes from the 8th valve 17, carry out mixing at sparger, heat and mass, form high pressure gaseous rock gas.According to the method, the gasification rate of LNG Liquefied natural gas can improve more than 10%, and uses solar energy as thermal source completely, and system works is stablized.
As a kind of preferred embodiment, the heat-transfer working medium in solar energy heat-collecting heat-storage unit selects conduction oil, and solar thermal collector 4 adopts trough type solar heat-collector, and First Heat Exchanger 7 adopts shell and tube heat exchanger, and the second heat exchanger 8 adopts plate type heat exchanger.
As mentioned above, embodiments of the invention are explained, obviously, as long as do not depart from fact inventive point of the present invention and effect, will be readily apparent to persons skilled in the art distortion, is also all included within protection scope of the present invention.

Claims (10)

1. the gasification system of the steam ejection liquefaction rock gas of a Driven by Solar Energy, it is characterized in that, comprise solar energy heat-collecting heat-storage unit and jet-type liquefaction weather gasification unit, described solar energy heat-collecting heat-storage unit is connected by First Heat Exchanger, the second heat exchanger weather gasification unit that liquefies with described jet-type respectively, and described jet-type liquefaction weather gasification unit is connected to high-pressure gas pipeline.
2. the gasification system of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 1, it is characterized in that, described solar energy heat-collecting heat-storage unit comprises heat storage can, solar thermal collector, First Heat Exchanger and the second heat exchanger, described heat storage can is connected with described solar thermal collector through high temperature pump, and described solar thermal collector is connected to described heat storage can through described First Heat Exchanger, described second heat exchanger successively.
3. the gasification system of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 2, it is characterized in that, also comprise the first valve sets, described first valve sets comprises the first valve, the second valve, the 3rd valve, the 4th valve, the 5th valve and the 6th valve; Wherein:
Described first valve is located at the first end of described solar thermal collector, and described second valve is located at the second end of described solar thermal collector, and described 4th valve is located between described first valve and the second valve;
Described second valve, described 4th valve are connected with described First Heat Exchanger through described 3rd valve respectively, and described second valve, described 4th valve are also connected to described heat storage can through described 5th valve respectively;
Described second heat exchanger is connected with described heat storage can through described 6th valve.
4. the gasification system of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 1, it is characterized in that, described jet-type liquefaction weather gasification unit comprises liquified natural gas tank, First Heat Exchanger, sparger and the second heat exchanger, described liquified natural gas tank is connected with described First Heat Exchanger through liquefied natural gas pump, described First Heat Exchanger is connected with described second heat exchanger through described sparger, and described second heat exchanger is connected to described high-pressure gas pipeline.
5. the gasification system of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 4, is characterized in that, also comprises the second valve sets, and described second valve sets comprises the 7th valve, pressure maintaining valve and the 8th valve; Wherein: described 7th valve is located between described liquified natural gas tank and described liquefied natural gas pump, described 8th valve is located between described liquified natural gas tank and described sparger, and described pressure maintaining valve is located between described sparger and described liquified natural gas tank.
6. the gasifying method of the steam ejection liquefaction rock gas of a Driven by Solar Energy, it is characterized in that, be included in the heat exchange step in solar energy heat-collecting heat-storage unit and the gasification step in jet-type liquefaction weather gasification unit, heat accumulation step is connected with gasification step respectively mutually by First Heat Exchanger, the second heat exchanger, and the rock gas after gasification step passes to high-pressure gas pipeline.
7. the gasifying method of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 6, is characterized in that, described heat exchange step is specially:
Under the effect of high temperature pump, heat-conducting work medium in heat reservoir enters in solar thermal collector through the first valve and heats, heat-conducting work medium after heating enters in First Heat Exchanger, the second heat exchanger through the second valve, the 3rd valve successively, heat exchange is carried out with LNG Liquefied natural gas, through heat exchange, LNG Liquefied natural gas endothermic disintergration is the gaseous natural gas of uniform temperature, and the heat-conducting work medium after heat release returns heat reservoir through the 6th valve.
8. the gasifying method of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 7, is characterized in that, described heat exchange step also comprises:
When the heat that solar thermal collector absorbs is greater than the heat summation of First Heat Exchanger and the second heat exchanger needs, 4th valve closing, makes unnecessary heat be stored into heat reservoir in the mode of high-temperature heat-conductive working medium by regulating the flow of high temperature pump and the aperture of the 5th valve;
When solar thermal collector absorb heat be less than or equal to First Heat Exchanger and the second heat exchanger needs heat summation and more than limiting value time, 5th valve closing, by regulating the flow of high temperature pump and the aperture of the 4th valve, First Heat Exchanger and the second heat exchanger is made to obtain required heat respectively;
When the heat that solar thermal collector absorbs limiting value and following time, closing the first valve, the second valve and the 5th valve, open the 4th valve, by regulating the flow of high temperature pump, making First Heat Exchanger and the second heat exchanger obtain required heat respectively.
9. the gasifying method of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 6, is characterized in that, described gasification step comprises:
Under the effect of liquefied natural gas pump, LNG Liquefied natural gas in liquified natural gas tank enters heat exchange in First Heat Exchanger through the 7th valve, high pressure superheater rock gas is converted into after heat exchange, high pressure superheater rock gas mixes in jet pump with the low pressure liquefied natural gas of coming through the 7th valve injection from liquified natural gas tank, forms high-pressure natural gas.
10. the gasifying method of the steam ejection liquefaction rock gas of Driven by Solar Energy according to claim 9, is characterized in that, described gasification step also comprises:
The high-pressure natural gas be mixed to form is divided into two-part: a part is after the second heat exchanger heat exchange, and send into high-pressure gas pipeline after being heated to setting value, another part returns liquified natural gas tank after pressure maintaining valve pressure regulation.
CN201510131426.5A 2015-03-24 2015-03-24 The gasification system of the injection liquefied natural gas of a kind of Driven by Solar Energy and method thereof Active CN104728599B (en)

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Cited By (1)

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CN105570669A (en) * 2016-02-05 2016-05-11 华北电力大学(保定) LNG air temperature type gasification device and method for generating electricity by using sun wall and temperature difference

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Publication number Priority date Publication date Assignee Title
CN105570669A (en) * 2016-02-05 2016-05-11 华北电力大学(保定) LNG air temperature type gasification device and method for generating electricity by using sun wall and temperature difference
CN105570669B (en) * 2016-02-05 2017-08-04 华北电力大学(保定) A kind of the LNG air temperature types gasification installation and method of utilization Solar wall and thermo-electric generation

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Patentee after: Beijing Younaite Gas Engineering Technology Co., Ltd.

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Patentee before: Beijing University of Civil Engineering and Architecture

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