CN103234116A - Mobile emergency natural gas supply system and mobile emergency natural gas supply method - Google Patents
Mobile emergency natural gas supply system and mobile emergency natural gas supply method Download PDFInfo
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- CN103234116A CN103234116A CN2013101294027A CN201310129402A CN103234116A CN 103234116 A CN103234116 A CN 103234116A CN 2013101294027 A CN2013101294027 A CN 2013101294027A CN 201310129402 A CN201310129402 A CN 201310129402A CN 103234116 A CN103234116 A CN 103234116A
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Abstract
The invention provides a mobile emergency natural gas supply system. The mobile emergency natural gas supply system comprises a water bath type vaporizer which is arranged on a skid-mounted vehicle, an ambient air vaporizer, a first liquefied natural gas inlet pipeline, a second liquefied natural gas inlet pipeline, a first gaseous natural gas outlet pipeline and a second gaseous natural gas outlet pipeline; the first liquefied natural gas inlet pipeline is connected with a liquid phase inlet end of the ambient air vaporizer; the second liquefied natural gas inlet pipeline and the second gaseous natural gas outlet pipeline are respectively connected with a fluid phase inlet end and a gaseous phase outlet end of the water bath type vaporizer; a gaseous phase outlet end of the ambient air vaporizer is connected with a combustor which is arranged inside the water bath type vaporizer; one end of the first gaseous natural gas outlet pipeline is connected with the gaseous phase outlet end of the water bath type vaporizer; and the other end of the first gaseous natural gas outlet pipeline is connected with the combustor which is arranged inside the water bath type vaporizer. The invention also provides a mobile emergency natural gas supply method using the mobile emergency natural gas supply system. The mobile emergency natural gas supply system and the mobile emergency natural gas supply method have the advantages of being large in gas supply capacity, high in temperature of the gaseous phase outlets, capable of achieving continuous gas supply, rapid in starting and capable of adapting to a mobile gas supply requirement.
Description
Technical field
The present invention relates to emergent natural gas supply system, relate in particular to a kind of moving emergency natural gas supply system and moving emergency natural gas supply method.
Background technique
The LNG Liquefied natural gas main component is methane, and colourless, tasteless, nontoxic and non-corrosiveness, its volume are about with 1/600 of amount gaseous natural gas volume, and weight only is about 45% of consubstantiality ponding, and calorific value is 52MMBtu/t(1MMBtu=2.52 * 10^8cal).Its English abbreviates LNG(Liquefied Natural Gas as).Rock gas is more and more favored as efficient, clean energy resource, and a lot of countries all classify rock gas as preferred fuels, and the ratio of rock gas in energy supply increases sharply.LNG Liquefied natural gas becomes the whole world and increases one of the swiftest and the most violent energy industry just with the rapid growth in every year about 12%.In China, many residential quarters have all been laid the natural gas supply pipeline, and increasing resident does not re-use the liquefied petroleum gas (LPG) (LPG) of steel cylinder storage pot type, and is to use the rock gas of steam line supply.
At present, when pipeline network of fuel gas in city is rushed to repair, need stop the supple of gas or steam to certain customers unavoidably, influence community resident user's gas just commonly used and industrial and commercial user's ordinary production operation; Along with the increasing of gas market development dynamics, the new user that gas company can't satisfy pipeline network of fuel gas in city no show zone uses the demand of rock gas as early as possible; State of arts and economic situation after can't the test conversion rock gas before the special industry user that needs carry out energy conversion is not changing rock gas can not be carried out the rock gas examination and be burnt; In addition, need use emergent combustion gas so that air feed, heat energy etc. to be provided in the area that emergency episode takes place.Therefore need to use mobile emergency natural gas supply system.
Yet the mobile natural gas vaporizing station that uses gasifies by air-heating type gasifier, though this mode can solve temporary transient air feed problem at present, but air demand is little, the gaseous phase outlet temperature is low, and the difficult replacing of source of the gas, and continuously uninterrupted air feed can't be provided.
Summary of the invention
At the problem that prior art exists, it is big to the invention provides a kind of air demand, the moving emergency natural gas supply system that the gaseous phase outlet temperature is higher, and the moving emergency natural gas supply method that adopts above-mentioned moving emergency natural gas supply system.Moving emergency natural gas supply system provided by the invention and moving emergency natural gas supply method are specially adapted to that temporary needs long period under the emergency case is stablized air feed to the user or the situation of emergent air feed during as gas company repairing pipe network.
The present invention is achieved in that a kind of moving emergency natural gas supply system, it is characterized in that: comprise the skid car, water bath type gasifier, air-heating type gasifier, the first liquified natural gas inlet ductwork are installed, the second liquified natural gas inlet ductwork, the first gaseous natural gas export pipeline and the second gaseous natural gas export pipeline on the described skid car; The described first liquified natural gas inlet ductwork is connected with the liquid phase entrance point of described air-heating type gasifier; The described second liquified natural gas inlet ductwork is connected with the gas phase outlet end with the liquid phase entrance point of water bath type gasifier respectively with the described second gaseous natural gas export pipeline, burner in the gaseous phase outlet end of described air-heating type gasifier and the described water bath type gasifier is connected, the described first gaseous natural gas export pipeline, one end is connected with the gaseous phase outlet end of described water bath type gasifier, and the burner in the other end and the described water bath type gasifier is connected.
Because the present invention mainly gasifies by water bath type gasifier liquid towards rock gas, its amount of vaporization is much larger than air-heating type gasifier, and through the gaseous natural gas of the water bath type gasifier gasification gaseous natural gas temperature height than the air-heating type gasifier gasification.The present invention adopts air-heating type gasifier liquid towards rock gas to gasify earlier, provide fuel to water bath type gasifier, then the gaseous natural gas by water bath type gasifier self gasification provides fuel to self, such mode makes the present invention start fast, air feed is rapid, more can adapt to the requirement of moving emergency air feed; The present invention adopts the skid car, can conveniently move, and response is rapid, and mobility is stronger.
As a further improvement on the present invention, described moving emergency natural gas supply system also comprises liquified natural gas intake header road and gaseous natural gas outlet header road; The entrance point of the entrance point of the described first liquified natural gas inlet ductwork and the described second liquified natural gas inlet ductwork is parallel to described liquified natural gas intake header road; The described first gaseous natural gas export pipeline and the described second gaseous natural gas export pipeline are parallel to described gaseous natural gas outlet header road, and described gaseous natural gas outlet header road is connected with the gaseous phase outlet end of described water bath type gasifier.Like this, make win liquified natural gas inlet ductwork and the shared one section inlet ductwork (being liquified natural gas intake header road) of the second liquified natural gas inlet ductwork; The first gaseous natural gas export pipeline and the second gaseous natural gas export pipeline share one section outlet pipeline (being gaseous natural gas outlet header road), have both saved the pipeline cost, are convenient to again each pipeline is controlled.
As a further improvement on the present invention, the entrance point of the described second liquified natural gas inlet ductwork is provided with first bye-pass and second bye-pass that is connected with described liquified natural gas intake header road; Described moving emergency natural gas supply system also comprises control system, and described control system comprises the temperature transducer of being located at described water bath type gasifier and is located at the Emergeny Cutoff Valves on the described second gaseous natural gas export pipeline and the pneumatic valve of being located at described second bye-pass.During initial air feed, earlier supply liquified natural gas by first bye-pass to water bath type gasifier, when the requirement of satisfying default through the gaseous natural gas after the water bath type gasifier gasification, and after the stable operation, can close described first bye-pass, open second bye-pass and supply liquified natural gas to water bath type gasifier, owing to be provided with the pneumatic valve that is connected with control system at second bye-pass, be provided with the Emergeny Cutoff Valves that is connected with described control system at the second gaseous natural gas export pipeline, and in water bath type gasifier, be provided with the temperature transducer that is connected with control system, therefore can realize automatic control of the present invention by control system this moment, when the temperature anomaly in the water bath type gasifier, control system can be cut off second bye-pass and the second gaseous natural gas export pipeline automatically, guarantees the safe operation of system.
Because Chinese gas industry pipeline has adopted a large amount of combustion gas plastic tube (normally PE pipeline), and the serviceability temperature scope of plastic tube is-5 ℃ ~ 40 ℃, and among the present invention, may be too high by the gaseous natural gas temperature that the water bath type gasifier outlet end comes out, should not directly be connected with gas transmission pipeline net work, therefore, as a further improvement on the present invention, described moving emergency natural gas supply system also comprises the static mixer that is installed on the described gaseous natural gas outlet header road, the described second liquified natural gas inlet ductwork is connected with the entrance point of described static mixer by a bypass tube, the described first gaseous natural gas export pipeline and the described second gaseous natural gas export pipeline are parallel to the outlet end of described static mixer, described bypass tube is provided with the liquified natural gas modulating valve that is electrically connected with described control system, and described static mixer outlet end is equipped with the temperature transmitter that is electrically connected with described control system.Can be mixed by the liquified natural gas that the second liquified natural gas inlet ductwork enters with the gaseous natural gas that come out by the water bath type gasifier outlet end and by bypass tube by static mixer, thereby reduce the gaseous natural gas temperature of gaseous natural gas outlet header way outlet end, make the temperature stabilization of the gaseous natural gas finally enter resident's gas transmission pipeline net work between-5 ℃ ~ 40 ℃, to adapt to the requirement of resident's gas transmission pipeline net work.To achieve these goals, also can adopt following scheme: comprise the static mixer that is installed on the described second gaseous natural gas export pipeline, the described second liquified natural gas inlet ductwork is connected with the entrance point of described static mixer by a bypass tube, described bypass tube is provided with the liquified natural gas modulating valve that is electrically connected with described control system, and described static mixer outlet end is equipped with the temperature transmitter that is electrically connected with described control system.
As a further improvement on the present invention, described liquified natural gas intake header road comprises that at least two are used for the liquified natural gas entrance point that is connected with liquified natural gas transportation tank car.At least two liquified natural gas feed ends can be provided like this, and than the design that a liquified natural gas entrance point is only arranged, the present invention is convenient to change source of the gas, can realize long-time free of discontinuities air feed.
As a further improvement on the present invention, the described second gaseous natural gas export pipeline comprises two at least for the gaseous natural gas outlet end that is connected with gas transmission pipeline net work.Can carry out air feed to a plurality of air feed nodes of gas transmission pipeline net work, flexibility ratio is higher.
As a further improvement on the present invention, described moving emergency natural gas supply system also comprises the pipeline overvoltage protective device of being located on the pipeline.Pipeline between described gaseous natural gas outlet header road and air-heating type gasifier and the water bath type gasifier is equipped with Safety relief valve.When if the gaseous pressure in the pipeline between described gaseous natural gas outlet header road and air-heating type gasifier and the water bath type gasifier exceeds the design pressure of pipeline, gaseous natural gas in the pipeline can diffuse out by Safety relief valve, thereby guarantees the safe operation of whole system.
As a further improvement on the present invention, described moving emergency natural gas supply system also comprises the pressure regulator of being located on the pipeline.Pipeline between the described second gaseous natural gas export pipeline and air-heating type gasifier and the water bath type gasifier is provided with pressure governor.Can regulate gaseous natural gas gaseous pressure in the pipeline between the described second gaseous natural gas export pipeline and air-heating type gasifier and the water bath type gasifier by described pressure governor, make its requirement of satisfying default, thereby make safety of the present invention, stable operation.
Particularly, the present invention also comprises device for adding odor, and described device for adding odor is connected with the described second gaseous natural gas export pipeline.Gaseous natural gas offers the user after smelly and uses through adding.
Described liquified natural gas entrance point and the equal Even of gaseous state gas outlet end connect flange-connection stainless steel metal flexible pipe.
Described moving emergency natural gas supply system is provided with combustion gas leak detection warning device, has further improved Safety performance of the present invention.
Moving emergency natural gas supply provided by the invention system has following beneficial effect: this moving emergency natural gas supply system is owing to take technique scheme, when the gas ductwork fault takes place, because this air supply system is skid, maneuverability, by tractor this air feeder is drawn to the destination, toggle speed is fast, air feed is rapid, can incorporate gas ductwork at short notice into and carry out air feed, air demand is big, the output fuel gas temperature is stable, and meet gas transmission pipeline net work to the requirement of temperature, can be connected with liquified natural gas transportation tank car by at least two ports, thereby guarantee uninterrupted air feed, and because control system and combustion gas leak detection warning device are installed in this system, safe and reliable when therefore moving.
The present invention also provides a kind of moving emergency natural gas supply method that adopts above-mentioned moving emergency natural gas supply system: may further comprise the steps successively:
1A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
1B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
1C, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction after the water bath type gasifier gasification and burn, keep the water temperature in the water bath type gasifier; Most of gaseous natural gas is communicated with the city gas transmission pipeline net work by the second gaseous natural gas export pipeline, offers the user and uses.
Said method adopts air-heating type gasifier liquid towards rock gas to gasify earlier and provides fuel to water bath type gasifier, then the gaseous natural gas fraction by water bath type gasifier self gasification provides fuel to self, major part offers the user and uses, such mode makes moving emergency natural gas supply provided by the invention system start fast, air demand is big, the gas phase temperature of air feed is higher, more can adapt to the requirement of moving emergency air feed.
The present invention also provides the moving emergency natural gas supply method of the above-mentioned moving emergency natural gas supply of another kind of employing system, may further comprise the steps successively:
2A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
2B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
2C, the liquified natural gas on the second liquified natural gas inlet ductwork is imported static mixer by bypass tube and evenly mix with gaseous natural gas on the gaseous natural gas outlet header road;
2D, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction that static mixer mixes and meet the temperature requirement of default and burn to keep water temperature in the water bath type gasifier; Most gaseous natural gas is communicated with the city gas transmission pipeline net work by the second gaseous natural gas export pipeline, offers the user and uses.
Said method adopts air-heating type gasifier liquid towards rock gas to gasify earlier and provides fuel to water bath type gasifier, after then being lowered the temperature by static mixer by the gaseous natural gas of water bath type gasifier self gasification, fraction provides fuel to self, most of user of supply uses, such mode makes moving emergency natural gas supply provided by the invention system start fast, air demand is big, the natural gas temperature of output is stable and meet gas transmission pipeline net work to the requirement of temperature, more can adapt to the requirement of moving emergency air feed.
The present invention also provides a kind of moving emergency natural gas supply method that adopts above-mentioned moving emergency natural gas supply system, may further comprise the steps successively:
3A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
3B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
3C, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction after the water bath type gasifier gasification and burn, keep the water temperature in the water bath type gasifier; Most gaseous natural gas enters the second gaseous natural gas export pipeline;
4D, the liquified natural gas on the second liquified natural gas inlet ductwork is imported static mixer by bypass tube and evenly mix with gaseous natural gas on the second gaseous natural gas export pipeline; After the mixed gaseous natural gas of static mixer meets the temperature requirement of default, be communicated with the city gas transmission pipeline net work, offer the user and use.
Said method adopts air-heating type gasifier liquid towards rock gas to gasify earlier and provides fuel to water bath type gasifier, then the gaseous natural gas fraction by water bath type gasifier self gasification provides fuel to self, most of by static mixer cooling back supply user use, such mode makes moving emergency natural gas supply provided by the invention system start fast, air demand is big, the natural gas temperature of output is stable and meet gas transmission pipeline net work to the requirement of temperature, more can adapt to the requirement of moving emergency air feed.
Description of drawings
Figure 1 shows that the moving emergency natural gas supply system appearance schematic representation that embodiment one provides;
Figure 2 shows that the moving emergency natural gas supply system architecture schematic representation that embodiment one provides;
Figure 3 shows that the moving emergency natural gas supply system architecture schematic representation that embodiment two provides;
Figure 4 shows that the moving emergency natural gas supply system architecture schematic representation that embodiment three provides;
Figure 5 shows that the moving emergency natural gas supply system works principle schematic that embodiment four provides;
Figure 6 shows that the moving emergency natural gas supply system works principle schematic that embodiment five provides;
Figure 7 shows that the moving emergency natural gas supply system works principle schematic that embodiment six provides.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and Examples, moving emergency natural gas supply system provided by the invention and moving emergency natural gas supply method are described in further details.
Embodiment one:
Referring to accompanying drawing 1 to Fig. 2, present embodiment provides a kind of moving emergency natural gas supply system, comprise skid car 1, water bath type gasifier 2, air-heating type gasifier 3, the first liquified natural gas inlet ductwork J1 are installed, the second liquified natural gas inlet ductwork J2, the first gaseous natural gas export pipeline C1 and the second gaseous natural gas export pipeline C2 on the described skid car; The described first liquified natural gas inlet ductwork J1 is connected with the liquid phase entrance point 33 of described air-heating type gasifier 3; The described second liquified natural gas inlet ductwork J2 is connected with gas phase outlet end 22 with the liquid phase entrance point 21 of water bath type gasifier 2 respectively with the described second gaseous natural gas export pipeline C2, the gaseous phase outlet end 34 of described air-heating type gasifier 3 is connected with burner in the described water bath type gasifier 2, the described first gaseous natural gas export pipeline C1, one end is connected with the gaseous phase outlet end 22 of described water bath type gasifier 2, and the other end is connected with burner in the described water bath type gasifier 2.
Described moving emergency natural gas supply system provides LNG Liquefied natural gas by LNG Liquefied natural gas transportation tank car when work.
As further improvement of this embodiment, described moving emergency natural gas supply system also comprises liquified natural gas intake header road J and gaseous natural gas outlet header road C; The entrance point of the entrance point of the described first liquified natural gas inlet ductwork J1 and the described second liquified natural gas inlet ductwork J2 is parallel to described liquified natural gas intake header road J; The described first gaseous natural gas export pipeline C1 and the described second gaseous natural gas export pipeline C2 are parallel to described gaseous natural gas outlet header road C, and described gaseous natural gas outlet header road C is connected with the gaseous phase outlet end 22 of described water bath type gasifier.Like this, when the present invention is connected with liquified natural gas transportation tank car, only need connection liquified natural gas transportation tank car and liquified natural gas intake header road to get final product, make win liquified natural gas inlet ductwork J1 and the shared one section inlet ductwork (being liquified natural gas intake header road) of the second liquified natural gas inlet ductwork J2; And only need offer a gaseous phase outlet at water bath type gasifier and can satisfy the air feed requirement, make win gaseous natural gas export pipeline C1 and the shared one section outlet pipeline (being gaseous natural gas outlet header road C) of the second gaseous natural gas export pipeline C2, the pipeline cost had both been saved in the said structure design, was convenient to again each pipeline is controlled.
As further improvement of this embodiment, described liquified natural gas intake header road J comprises that two are used for transporting liquified natural gas entrance point 1A and the 1B that tank car is connected with liquified natural gas.At least two liquified natural gas feed ends can be provided like this, can supply simultaneously also and can switch the supply liquified natural gas mutually, than the design that a liquified natural gas entrance point is only arranged, the present invention is convenient to change source of the gas, can realize long-time free of discontinuities air feed.
Particularly, this moving emergency natural gas supply system is when work, liquified natural gas is transported tank car to be connected with liquified natural gas entrance point 1A and/or 1B by pipeline, be communicated with liquified natural gas transportation tank car and the first liquified natural gas inlet ductwork J1 earlier, whole liquified natural gas inlet ductwork is carried out precooling, pre-cool time is 10 minutes, after precooling finishes, slowly open the liquid phase inlet valve 31 of air-heating type gasifier, make liquified natural gas enter air-heating type gasifier 2 by the first liquified natural gas inlet ductwork J1, open the gaseous phase outlet valve 32 of air-heating type gasifier 3 after five minutes again, the air pressure of setting the air-heating type gasifier gaseous phase outlet by pressure governor 7 is 0.2Mpa; The liquified natural gas gasification that enters air-heating type gasifier 3 is gone into water bath type gasifier 2 for gaseous natural gas is laggard, after confirming that air-heating type gasifier 3 is working properly, water in the hot water combustion heating system heated water bath formula vaporizer 2 of unlatching water bath type gasifier 2, after treating that the water temperature in the water bath type gasifier 2 reaches the temperature of default (45 ℃), open the valve 9 that leads to water bath type gasifier 2 slowly as far as possible, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork J2, make liquified natural gas enter water bath type gasifier 2 gasifications and be gaseous natural gas, rock gas fraction after water bath type gasifier 2 gasifications is got back to water bath type gasifier by the first gaseous natural gas export pipeline C1 and is burnt, keep the water temperature in the water bath type gasifier, can close the liquid phase inlet valve 31 that the first liquified natural gas inlet ductwork J1(closes air-heating type gasifier this moment and get final product); Most of gaseous natural gas is communicated with the city gas transmission pipeline net work by the second gaseous natural gas export pipeline C2, the supply gas pressure of pressure pipe net is adjusted the pressure of the second gaseous natural gas export pipeline C2 (a little more than the about 0.01Mpa of ductwork pressure ~ 0.05Mpa), offer user's use then by pressure governor 10 in the municipal combustion gas that provides according to the dispatching center.
Because present embodiment mainly gasifies by water bath type gasifier 2 liquid towards rock gases, the amount of vaporization that its amount of vaporization uses air-heating type gasifier to gasify much larger than prior art, and through the gaseous natural gas of the water bath type gasifier 2 gasifications natural gas temperature height than the air-heating type gasifier gasification.The present invention adopts air-heating type gasifier 3 liquid towards rock gases to gasify earlier, fuel is provided for water bath type gasifier 2, then the rock gas that self is gasified by water bath type gasifier 2 provides fuel to self, such mode makes the present invention start fast, air feed is rapid, more can adapt to the requirement of moving emergency air feed; The present invention adopts the skid car, can conveniently move, and response is rapid, and mobility is stronger.
As further improvement of this embodiment, the entrance point of the described second gaseous natural gas inlet ductwork J2 is provided with the first bye-pass J21 and the second bye-pass J22 that is connected with described liquified natural gas intake header road J; Described moving emergency natural gas supply system also comprises control system, and described control system comprises to be located at the temperature transducer in the described water bath type gasifier 2 and to be located at the Emergeny Cutoff Valves 4 on the described second gaseous natural gas export pipeline C2 and the pneumatic valve 5 of being located at the described second bye-pass J22.During initial air feed, give water bath type gasifier 2 supply liquified natural gass by the first bye-pass J21 earlier, (pressure Ying is ≦ 0.72Mpa behind amounts of pressurized gaseous and temperature stabilization through the gaseous natural gas after water bath type gasifier 2 gasifications, temperature Ying is ≧ 30 ℃), can close the described first bye-pass J21(is throttle down 9), open the second bye-pass J22(and namely open pneumatic valve 5) give water bath type gasifier 2 supply liquified natural gass, owing to be provided with the pneumatic valve 5 that is connected with control system at the second bye-pass J22, be provided with the Emergeny Cutoff Valves 4 that is connected with described control system at the second gaseous natural gas export pipeline C2, and in water bath type gasifier 2, be provided with the temperature transducer that is connected with control system, therefore can realize automatic control of the present invention by control system this moment, when the temperature anomaly in the water bath type gasifier 2, control system can be cut off the second bye-pass J22 and the second gaseous natural gas export pipeline C2 automatically, guarantees this moving emergency natural gas supply security of system stable operation.
As further improvement of this embodiment, the described second gaseous natural gas export pipeline C2 comprises two at least for the gaseous natural gas outlet end 2A and the 2B that are connected with gas transmission pipeline net work.Can carry out air feed to a plurality of air feed nodes of gas transmission pipeline net work, flexibility ratio is higher.
As further improvement of this embodiment, the pipeline between described gaseous natural gas outlet header road C and air-heating type gasifier 3 and the water bath type gasifier 2 is equipped with Safety relief valve 6.When if the gaseous pressure in the pipeline between described gaseous natural gas outlet header road C and air-heating type gasifier 3 and the water bath type gasifier 2 exceeds the design pressure of pipeline, gaseous natural gas in the pipeline can diffuse out by Safety relief valve 6, thereby guarantees the safe operation of whole system.
Particularly, the present invention also comprises device for adding odor 8, and described device for adding odor 8 is connected with the described second gaseous natural gas export pipeline C2.Gaseous natural gas offers the user after smelly and uses through adding.
Described liquified natural gas entrance point 1A and 1B and gaseous natural gas outlet end 2A and 2B Jun Even connect flange-connection stainless steel metal flexible pipe.
Described moving emergency natural gas supply system is provided with combustion gas leak detection warning device (not marking among the figure), has further improved Safety performance of the present invention.
Also be equipped with the generator that power supply can be provided and the flowmeter that discharge record is provided in the described moving emergency natural gas supply of the present embodiment system.
The present invention has following beneficial effect: this moving emergency natural gas supply system is owing to take technique scheme, when the gas ductwork fault takes place, because this air supply system is skid, maneuverability, by tractor this air feeder is drawn to the destination, toggle speed is fast, air feed is rapid, can incorporate gas ductwork at short notice into and carry out air feed, air demand big (the separate unit system can provide the natural gas gasifying Processing capacity up to 60000m3/ hour), output combustion gas gaseous phase outlet temperature is higher, and temperature stabilization can be connected with liquified natural gas transportation tank car by at least two ports, thereby guarantee uninterrupted air feed, and because control system and combustion gas leak detection warning device are installed in this system, safe and reliable when therefore moving.
Embodiment two:
Referring to Fig. 3, because Chinese gas industry pipeline has adopted a large amount of combustion gas plastic tube (normally PE pipeline), and the serviceability temperature scope of plastic tube is-5 ℃ ~ 40 ℃, and among the present invention, may be too high by the gaseous natural gas temperature that the water bath type gasifier outlet end comes out, should not directly be connected with gas transmission pipeline net work.
Therefore, as a further improvement on the present invention, present embodiment and last embodiment's difference are:
Described moving emergency natural gas supply system also comprises the static mixer 11 that is installed on the described gaseous natural gas outlet header road, the described second liquified natural gas inlet ductwork J2 is connected with the entrance point 111 of described static mixer 11 by a bypass tube 12, the described first gaseous natural gas export pipeline C1 and the described second gaseous state export pipeline C2 are parallel to the outlet end of described static mixer 11, described bypass tube 12 is provided with the liquified natural gas modulating valve 13 that is electrically connected with described control system, and described static mixer 11 outlet end are equipped with the temperature transmitter 14 that is electrically connected with described control system.Can be mixed by the liquified natural gas that the second liquified natural gas inlet ductwork J2 enters with the gaseous natural gas that come out by water bath type gasifier 2 outlet end and by bypass tube 12 by static mixer 11, thereby reduce the gaseous natural gas temperature of gaseous natural gas outlet header's road C outlet end (being the outlet end of static mixer 11).Because liquified natural gas can absorb heat in the moment gasification, therefore can reduce the temperature of gaseous natural gas rapidly.Mixed gas evenly twists to mix by static mixer and makes temperature relatively stable, makes the temperature stabilization of the gaseous natural gas finally enter resident's gas transmission pipeline net work between-5 ℃ ~ 40 ℃, to adapt to the requirement of resident's gas transmission pipeline net work.Wherein, described control system is by intelligent instrument with enroll process control block (PCB) the liquid natural tolerance of sneaking into is carried out Automatic Control.Described control system is used for receiving the temperature signal of temperature transmitter 14 feedbacks, thereby regulate the size of the valve opening of the liquified natural gas modulating valve 13 on the bypass tube with reference to this signal, thereby regulate the liquid natural tolerance that enters in the static mixer, namely enter liquified natural gas in the static mixer and the proportioning of gaseous natural gas by adjusting, thus the gaseous natural gas temperature of control static mixer outlet end.
Embodiment three:
Referring to Fig. 4, in order to make the temperature of the final gaseous natural gas of supplying with the underground gas gas transmission pipeline net work in-5 ℃ ~ 40 ℃ scope, also can adopt the different technological scheme of following and embodiment two, its difference is: static mixer 15 is installed on the described second gaseous natural gas export pipeline C2, the described second liquified natural gas inlet ductwork J2 is connected with the entrance point 151 of described static mixer 15 by a bypass tube 16, described bypass tube 16 is provided with the liquified natural gas modulating valve 17 that is electrically connected with described control system, and described static mixer 15 outlet end are equipped with the temperature transmitter 18 that is electrically connected with described control system.
Can will be entered into the gaseous natural gas of the second gaseous natural gas export pipeline C2 by water bath type gasifier 2 outlet end and be mixed by the liquified natural gas that the second liquified natural gas inlet ductwork J2 enters by bypass tube 16 by static mixer 15, thereby reduce the gaseous natural gas temperature of the second gaseous natural gas export pipeline C2 outlet end.Because liquified natural gas can absorb heat in the moment gasification, therefore can reduce the temperature of gaseous natural gas rapidly.Mixed gas evenly twists to mix by static mixer and makes temperature relatively stable, makes the temperature stabilization of the gaseous natural gas finally enter resident's gas transmission pipeline net work between-5 ℃ ~ 40 ℃, to adapt to the requirement of resident's gas transmission pipeline net work.Wherein, described control system is by intelligent instrument with enroll process control block (PCB) the liquid natural tolerance of sneaking into is carried out Automatic Control.Described control system is used for receiving the temperature signal of temperature transmitter 18 feedbacks, thereby regulate the size of the valve opening of the liquified natural gas modulating valve 17 on the bypass tube 16 with reference to this signal, thereby regulate the liquid natural tolerance that enters in the static mixer 15, namely enter liquified natural gas in the static mixer 15 and the proportioning of gaseous natural gas by adjusting, thus the gaseous natural gas temperature of control static mixer 15 outlet end.
Embodiment four:
Referring to Fig. 5, present embodiment provides the moving emergency natural gas supply method of the described moving emergency natural gas supply of a kind of embodiment of employing one system: may further comprise the steps successively:
1A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
1B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
1C, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction after the water bath type gasifier gasification and burn, keep the water temperature in the water bath type gasifier; Most of gaseous natural gas is communicated with the city gas transmission pipeline net work by the second gaseous natural gas export pipeline, offers the user and uses.
Said method adopts air-heating type gasifier liquid towards rock gas to gasify earlier and provides fuel to water bath type gasifier, then the gaseous natural gas fraction by water bath type gasifier self gasification provides fuel to self, major part offers the user and uses, such mode makes moving emergency natural gas supply provided by the invention system start fast, air demand is big, the gas phase temperature of air feed is higher, more can adapt to the requirement of moving emergency air feed.
Embodiment five:
Referring to Fig. 6, present embodiment provides the moving emergency natural gas supply method of the described moving emergency natural gas supply of a kind of embodiment of employing two system, may further comprise the steps successively:
2A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
2B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
2C, the liquified natural gas on the second liquified natural gas inlet ductwork is imported static mixer by bypass tube and evenly mix with gaseous natural gas on the gaseous natural gas outlet header road;
2D, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction that static mixer mixes and meet the temperature requirement of default and burn to keep water temperature in the water bath type gasifier; Most gaseous natural gas is communicated with the city gas transmission pipeline net work by the second gaseous natural gas export pipeline, offers the user and uses.
Said method adopts air-heating type gasifier liquid towards rock gas to gasify earlier and provides fuel to water bath type gasifier, after then being lowered the temperature by static mixer by the gaseous natural gas of water bath type gasifier self gasification, fraction provides fuel to self, most of user of supply uses, such mode makes moving emergency natural gas supply provided by the invention system start fast, air demand is big, the natural gas temperature of output is stable and meet gas transmission pipeline net work to the requirement of temperature, more can adapt to the requirement of moving emergency air feed.
Embodiment six:
Referring to Fig. 7, present embodiment provides the moving emergency natural gas supply method of the described moving emergency natural gas supply of a kind of embodiment of employing three system, may further comprise the steps successively:
3A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
3B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
3C, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction after the water bath type gasifier gasification and burn, keep the water temperature in the water bath type gasifier; Most gaseous natural gas enters the second gaseous natural gas export pipeline;
4D, the liquified natural gas on the second liquified natural gas inlet ductwork is imported static mixer by bypass tube and evenly mix with gaseous natural gas on the second gaseous natural gas export pipeline; After the mixed gaseous natural gas of static mixer meets the temperature requirement of default, be communicated with the city gas transmission pipeline net work, offer the user and use.
Said method adopts air-heating type gasifier liquid towards rock gas to gasify earlier and provides fuel to water bath type gasifier, then the gaseous natural gas fraction by water bath type gasifier self gasification provides fuel to self, most of by static mixer cooling back supply user use, such mode makes moving emergency natural gas supply provided by the invention system start fast, air demand is big, the natural gas temperature of output is stable and meet gas transmission pipeline net work to the requirement of temperature, more can adapt to the requirement of moving emergency air feed.
Below only be preferred embodiment of the present invention, not in order to limiting the present invention, all modifications of in the spirit and principles in the present invention, making, improve, be equal to replacement etc., all should be included in protection scope of the present invention.
Claims (10)
1. moving emergency natural gas supply system, it is characterized in that: comprise the skid car, water bath type gasifier, air-heating type gasifier, the first liquified natural gas inlet ductwork are installed, the second liquified natural gas inlet ductwork, the first gaseous natural gas export pipeline and the second gaseous natural gas export pipeline on the described skid car; The described first liquified natural gas inlet ductwork is connected with the liquid phase entrance point of described air-heating type gasifier; The described second liquified natural gas inlet ductwork is connected with the gas phase outlet end with the liquid phase entrance point of water bath type gasifier respectively with the described second gaseous natural gas export pipeline, burner in the gaseous phase outlet end of described air-heating type gasifier and the described water bath type gasifier is connected, the described first gaseous natural gas export pipeline, one end is connected with the gaseous phase outlet end of described water bath type gasifier, and the burner in the other end and the described water bath type gasifier is connected.
2. moving emergency natural gas supply according to claim 1 system is characterized in that: also comprise liquified natural gas intake header road and gaseous natural gas outlet header road; The entrance point of the entrance point of the described first liquified natural gas inlet ductwork and the described second liquified natural gas inlet ductwork is parallel to described liquified natural gas intake header road; The described first gaseous natural gas export pipeline and the described second gaseous natural gas export pipeline are parallel to described gaseous natural gas outlet header road, and described gaseous natural gas outlet header road is connected with the gaseous phase outlet end of described water bath type gasifier.
3. moving emergency natural gas supply according to claim 2 system, it is characterized in that: the entrance point of the described second liquified natural gas inlet ductwork is provided with first bye-pass and second bye-pass that is connected respectively with described liquified natural gas intake header road; Described moving emergency natural gas supply system also comprises control system, and described control system comprises the temperature transducer of being located at described water bath type gasifier and is located at the Emergeny Cutoff Valves on the described second gaseous natural gas export pipeline and the pneumatic valve of being located at described second bye-pass.
4. moving emergency natural gas supply according to claim 3 system, it is characterized in that: also comprise the static mixer that is installed on the described gaseous natural gas outlet header road, the described second liquified natural gas inlet ductwork is connected with the entrance point of described static mixer by a bypass tube, the described first gaseous natural gas export pipeline and the described second gaseous natural gas export pipeline are parallel to the outlet end of described static mixer, described bypass tube is provided with the liquified natural gas modulating valve that is electrically connected with described control system, and described static mixer outlet end is equipped with the temperature transmitter that is electrically connected with described control system.
5. moving emergency natural gas supply according to claim 3 system, it is characterized in that: also comprise the static mixer that is installed on the described second gaseous natural gas export pipeline, the described second liquified natural gas inlet ductwork is connected with the entrance point of described static mixer by a bypass tube, described bypass tube is provided with the liquified natural gas modulating valve that is electrically connected with described control system, and described static mixer outlet end is equipped with the temperature transmitter that is electrically connected with described control system.
6. according to each described moving emergency natural gas supply system of claim 1 to 5, it is characterized in that: described liquified natural gas intake header road comprises that at least two are used for the liquified natural gas entrance point that is connected with liquified natural gas transportation tank car.
7. moving emergency natural gas supply according to claim 6 system is characterized in that: the described second gaseous natural gas export pipeline comprises that at least two are used for the gaseous natural gas outlet end that is connected with gas transmission pipeline net work.
8. a moving emergency natural gas supply method that adopts the described moving emergency natural gas supply of claim 1 system is characterized in that, may further comprise the steps successively:
1A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
1B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
1C, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction after the water bath type gasifier gasification and burn, keep the water temperature in the water bath type gasifier; Most of gaseous natural gas is communicated with the city gas transmission pipeline net work by the second gaseous natural gas export pipeline, offers the user and uses.
9. a moving emergency natural gas supply method that adopts the described moving emergency natural gas supply of claim 4 system is characterized in that, may further comprise the steps successively:
2A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
2B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
2C, the liquified natural gas on the second liquified natural gas inlet ductwork is imported static mixer by bypass tube and evenly mix with gaseous natural gas on the gaseous natural gas outlet header road;
2D, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction that static mixer mixes and meet the temperature requirement of default and burn, keep the water temperature in the water bath type gasifier; Most gaseous natural gas is communicated with the city gas transmission pipeline net work by the second gaseous natural gas export pipeline, offers the user and uses.
10. a moving emergency natural gas supply method that adopts the described moving emergency natural gas supply of claim 5 system is characterized in that, may further comprise the steps successively:
3A, the first liquified natural gas inlet ductwork is fed liquified natural gas, make liquified natural gas enter the air-heating type gasifier gasification for gaseous natural gas and enter water bath type gasifier by air-heating type gasifier by the first liquified natural gas inlet ductwork and burn the water in the heated water bath formula vaporizer;
3B, treat that water temperature in the water bath type gasifier reaches the temperature of default after, be communicated with liquified natural gas transportation tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter the water bath type gasifier gasification is gaseous natural gas;
3C, will get back to water bath type gasifier by the first gaseous natural gas export pipeline through the gaseous natural gas fraction after the water bath type gasifier gasification and burn, keep the water temperature in the water bath type gasifier; Most gaseous natural gas enters the second gaseous natural gas export pipeline;
4D, the liquified natural gas on the second liquified natural gas inlet ductwork is imported static mixer by bypass tube and evenly mix with gaseous natural gas on the second gaseous natural gas export pipeline; After the mixed gaseous natural gas of static mixer meets the temperature requirement of default, be communicated with the city gas transmission pipeline net work, offer the user and use.
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| CN104712904A (en) * | 2015-03-13 | 2015-06-17 | 青岛新奥燃气设施开发有限公司 | Emergent LNG supply device |
| CN108087722A (en) * | 2017-12-12 | 2018-05-29 | 四川华气清源科技有限公司 | A kind of movable type LPG bottle group gasification installation and its gasification process |
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| CN103234116B (en) | 2015-10-28 |
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