CN103234116B - A kind of moving emergency natural gas supply system and moving emergency natural gas supply method - Google Patents
A kind of moving emergency natural gas supply system and moving emergency natural gas supply method Download PDFInfo
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Abstract
The invention provides a kind of moving emergency natural gas supply system, comprise the water bath type gasifier be loaded on skid car, air-heating type gasifier, the first liquified natural gas inlet ductwork, the second liquified natural gas inlet ductwork, the first gaseous natural gas export pipeline and the second gaseous natural gas export pipeline; First liquified natural gas inlet ductwork is connected with the fluid inlet end of air-heating type gasifier; Second liquified natural gas inlet ductwork is connected with water bath type gasifier fluid inlet end and gas phase outlet end respectively with the second gaseous natural gas export pipeline, air-heating type gasifier gaseous phase outlet end is connected with the burner in water bath type gasifier, first gaseous natural gas export pipeline one end is connected with the gaseous phase outlet end of water bath type gasifier, and the other end is connected with the burner in water bath type gasifier.The present invention also provides the air supply method of employing said system, and air demand of the present invention is large, and gaseous phase outlet temperature is higher, can realize uninterrupted air feed, starts fast, more can adapt to mobile answering.
Description
Technical field
The present invention relates to emergent natural gas supply system, particularly relate to a kind of moving emergency natural gas supply system and moving emergency natural gas supply method.
Background technique
LNG Liquefied natural gas main component is methane, colourless, tasteless, nontoxic and non-corrosiveness, its volume is about with amount gaseous natural gas volume 1/600, and weight is only about 45% of consubstantiality ponding, and calorific value is 52MMBtu/t (1MMBtu=2.52 × 10^8cal).Its English abbreviation is LNG (Liquefied Natural Gas).Rock gas is more and more favored as efficient, clean energy resource, and rock gas is all classified as preferred fuels by a lot of country, and the ratio of rock gas in energy supply increases sharply.LNG Liquefied natural gas just with annual about 12% rapid growth, become the whole world and increase one of the swiftest and the most violent energy industry.In China, many communities have laid natural gas supply pipeline all, and increasing resident does not re-use the liquefied petroleum gas (LPG) (LPG) of steel cylinder storage pot type, but use the rock gas of steam line supply.
At present, when pipeline network of fuel gas in city is rushed to repair, need unavoidably to stop the supple of gas or steam to certain customers, have impact on the just conventional gas of community resident user and the normal production and operation of industrial and commercial user; Along with the increasing of gas market development dynamics, gas company cannot meet the demand that new user that pipeline network of fuel gas in city do not arrive region uses rock gas as early as possible; Cannot state of arts after test conversion rock gas and economic situation before non-Natural Gas Conversion the special industry user needing to carry out energy conversion, rock gas examination can not be carried out and burn; In addition, need in the area that emergency episode occurs to use emergent combustion gas to provide air feed, heat energy etc.Therefore need to use mobile emergency natural gas supply system.
But the mobile natural gas vaporizing station used at present, gasified by air-heating type gasifier, although this mode can solve temporary transient air feed problem, but air demand is little, gaseous phase outlet temperature is low, and source of the gas is not easily changed, and cannot provide continuously uninterrupted air feed.
Summary of the invention
For prior art Problems existing, the invention provides a kind of air demand large, the moving emergency natural gas supply system that gaseous phase outlet temperature is higher, and the moving emergency natural gas supply method adopting above-mentioned moving emergency natural gas supply system.Under moving emergency natural gas supply system provided by the invention and moving emergency natural gas supply method are specially adapted to emergency case, the temporary needs long period stablizes air feed or the situation as air feed of meeting an urgent need during gas company's repairing pipe network to user.
The present invention is achieved in that a kind of moving emergency natural gas supply system, it is characterized in that: comprise skid car, described skid car is provided with water bath type gasifier, air-heating type gasifier, the first liquified natural gas inlet ductwork, the second liquified natural gas inlet ductwork, the first gaseous natural gas export pipeline and the second gaseous natural gas export pipeline; Described first liquified natural gas inlet ductwork is connected with the fluid inlet end of described air-heating type gasifier; Described second liquified natural gas inlet ductwork and described second gaseous natural gas export pipeline are connected with the fluid inlet end of water bath type gasifier and gas phase outlet end respectively, the gaseous phase outlet end of described air-heating type gasifier is connected with the burner in described water bath type gasifier, 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 other end is connected with the burner in described water bath type gasifier.
Because the present invention is gasified mainly through water bath type gasifier liquid towards rock gas, its amount of vaporization is much larger than air-heating type gasifier, and high through the gaseous natural gas temperature that gasifies than air-heating type gasifier of gaseous natural gas of water bath type gasifier gasification.The present invention first adopts air-heating type gasifier liquid towards rock gas to gasify, fuel is provided to water bath type gasifier, the gaseous natural gas then gasified by water bath type gasifier self 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 skid car, can facilitate movement, and rapidly, mobility is stronger in response.
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 described first liquified natural gas inlet ductwork and the entrance point of described second liquified natural gas inlet ductwork are parallel to described liquified natural gas intake header road; Described first gaseous natural gas export pipeline and 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, the first liquified natural gas inlet ductwork and the second liquified natural gas inlet ductwork is made to share one section of inlet ductwork (i.e. liquified natural gas intake header road); First gaseous natural gas export pipeline and the second gaseous natural gas export pipeline share one section outlet pipeline (i.e. gaseous natural gas outlet header road), have both saved pipeline cost, are convenient to again control each pipeline.
As a further improvement on the present invention, the entrance point of described second liquified natural gas inlet ductwork is provided with the first bye-pass and the second bye-pass that are 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 described second gaseous natural gas export pipeline and is located at the pneumatic valve of described second bye-pass.During initial air feed, first supply liquified natural gas by the first bye-pass to water bath type gasifier, when the gaseous natural gas after water bath type gasifier gasification meets the requirement of default, and after stable operation, described first bye-pass can be closed, open the second bye-pass and supply liquified natural gas to water bath type gasifier, owing to being provided with the pneumatic valve be connected with control system on the second bye-pass, second gaseous natural gas export pipeline is provided with the Emergeny Cutoff Valves be connected with described control system, and in water bath type gasifier, be provided with the temperature transducer be connected with control system, therefore now can be realized automatic control of the present invention by control system, when temperature anomaly in water bath type gasifier, control system can cut off the second bye-pass and the second gaseous natural gas export pipeline automatically, the safe operation of guarantee system.
Because China Gas industry pipeline have employed a large amount of combustion gas plastic tubes (normally PE pipeline), and the serviceability temperature scope of plastic tube is-5 DEG C ~ 40 DEG C, and in the present invention, may be too high by water bath type gasifier outlet end gaseous natural gas temperature 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 be installed on described gaseous natural gas outlet header road, described second liquified natural gas inlet ductwork is connected by the entrance point of bypass line with described static mixer, described first gaseous natural gas export pipeline and 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 be electrically connected with described control system, described static mixer outlet end is provided with the temperature transmitter be electrically connected with described control system.Can by by water bath type gasifier outlet end gaseous natural gas out and mixed by the liquified natural gas that bypass tube is entered by the second liquified natural gas inlet ductwork by static mixer, thus 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 entering resident's gas transmission pipeline net work between-5 DEG C ~ 40 DEG C, to adapt to the requirement of resident's gas transmission pipeline net work.To achieve these goals, also following scheme can be adopted: comprise the static mixer be installed on described second gaseous natural gas export pipeline, described second liquified natural gas inlet ductwork is connected by the entrance point of bypass line with described static mixer, described bypass tube is provided with the liquified natural gas modulating valve be electrically connected with described control system, and described static mixer outlet end is provided with the temperature transmitter be electrically connected with described control system.
As a further improvement on the present invention, described liquified natural gas intake header road at least comprises two for transporting with liquified natural gas the liquified natural gas entrance point that tank car is connected.Can provide at least two liquified natural gas feed ends like this, compared to the design only having a liquified natural gas entrance point, 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, described second gaseous natural gas export pipeline at least comprises two gaseous natural gas outlet end for being connected with gas transmission pipeline net work.Can carry out air feed to multiple 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 be located on pipeline.Described gaseous natural gas outlet header road and the pipeline between air-heating type gasifier and water bath type gasifier are equipped with Safety relief valve.If when the gaseous pressure in described gaseous natural gas outlet header road and the pipeline between air-heating type gasifier and water bath type gasifier exceeds the design pressure of pipeline, gaseous natural gas in pipeline can diffuse out by Safety relief valve, thus ensures 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 be located on pipeline.Described second gaseous natural gas export pipeline and the pipeline between air-heating type gasifier and water bath type gasifier are provided with pressure governor.The gaseous natural gas gaseous pressure in described second gaseous natural gas export pipeline and the pipeline between air-heating type gasifier and water bath type gasifier can be regulated by described pressure governor, make it meet the requirement of default, thus 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 described second gaseous natural gas export pipeline.Gaseous natural gas through adding smelly after be supplied to user use.
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 gas leakage detection alarm device, further increases Safety performance of the present invention.
Moving emergency natural gas supply system provided by the invention has following beneficial effect: this moving emergency natural gas supply system is owing to taking technique scheme, when there is gas ductwork fault, because this air supply system is skid, maneuverability, by tractor, this air feeder is drawn to destination, toggle speed is fast, air feed is rapid, gas ductwork can be incorporated at short notice and carry out air feed, air demand is large, output fuel gas temperature is stablized, and meet the requirement of gas transmission pipeline net work to temperature, transport tank car by least two ports and liquified natural gas to be connected, thus ensure that uninterrupted air feed, and because being provided with control system and gas leakage detection alarm device in this system, safe and reliable when therefore running.
The present invention also provides a kind of and adopts the moving emergency natural gas supply method of above-mentioned moving emergency natural gas supply system: comprise the following steps successively:
1A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
1B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
1C, the gaseous natural gas fraction after water bath type gasifier gasification is got back to water bath type gasifier by the first gaseous natural gas export pipeline and burnt, keep the water temperature in water bath type gasifier; Major part gaseous natural gas is communicated with city gas transmission pipeline net work by the second gaseous natural gas export pipeline, is supplied to user and uses.
Said method first adopts air-heating type gasifier liquid towards rock gas to carry out gasifying and provide fuel to water bath type gasifier, the gaseous natural gas fraction then gasified by water bath type gasifier self provides fuel to self, major part is supplied to user and uses, such mode makes moving emergency natural gas supply system provided by the invention start fast, air demand is large, 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 another kind of moving emergency natural gas supply method adopting above-mentioned moving emergency natural gas supply system, comprises the following steps successively:
2A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
2B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
2C, the liquified natural gas in the second liquified natural gas inlet ductwork imported static mixer by bypass tube and carries out uniform stirring with the gaseous natural gas on gaseous natural gas outlet header road and mix;
2D, will to mix through static mixer and the gaseous natural gas fraction meeting the temperature requirement of default gets back to by the first gaseous natural gas export pipeline the water temperature that water bath type gasifier carries out burning to keep in water bath type gasifier; Most gaseous natural gas is communicated with city gas transmission pipeline net work by the second gaseous natural gas export pipeline, is supplied to user and uses.
Said method first adopts air-heating type gasifier liquid towards rock gas to carry out gasifying and provide fuel to water bath type gasifier, after the gaseous natural gas then gasified by water bath type gasifier self is lowered the temperature by static mixer, fraction provides fuel to self, major part supply user uses, such mode makes moving emergency natural gas supply system provided by the invention start fast, air demand is large, the natural gas temperature exported is stablized and meets the requirement of gas transmission pipeline net work to 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 adopting above-mentioned moving emergency natural gas supply system, comprises the following steps successively:
3A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
3B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
3C, the gaseous natural gas fraction after water bath type gasifier gasification is got back to water bath type gasifier by the first gaseous natural gas export pipeline and burnt, keep the water temperature in water bath type gasifier; Most gaseous natural gas enters the second gaseous natural gas export pipeline;
3D, the liquified natural gas in the second liquified natural gas inlet ductwork imported static mixer by bypass tube and carries out uniform stirring with the gaseous natural gas on the second gaseous natural gas export pipeline and mix; After the mixed gaseous natural gas of static mixer meets the temperature requirement of default, be communicated with city gas transmission pipeline net work, be supplied to user and use.
Said method first adopts air-heating type gasifier liquid towards rock gas to carry out gasifying and provide fuel to water bath type gasifier, the gaseous natural gas fraction then gasified by water bath type gasifier self provides fuel to self, major part is used by supply user after static mixer cooling, such mode makes moving emergency natural gas supply system provided by the invention start fast, air demand is large, the natural gas temperature exported is stablized and meets the requirement of gas transmission pipeline net work to temperature, more can adapt to the requirement of moving emergency air feed.
Accompanying drawing explanation
Figure 1 shows that the moving emergency natural gas supply system appearance schematic diagram that embodiment one provides;
Figure 2 shows that the moving emergency natural gas supply system architecture schematic diagram that embodiment one provides;
Figure 3 shows that the moving emergency natural gas supply system architecture schematic diagram that embodiment two provides;
Figure 4 shows that the moving emergency natural gas supply system architecture schematic diagram that embodiment three provides;
Figure 5 shows that the moving emergency natural gas supply System Working Principle schematic diagram that embodiment four provides;
Figure 6 shows that the moving emergency natural gas supply System Working Principle schematic diagram that embodiment five provides;
Figure 7 shows that the moving emergency natural gas supply System Working Principle schematic diagram that embodiment six provides.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly understand, 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:
See accompanying drawing 1 to Fig. 2, the present embodiment provides a kind of moving emergency natural gas supply system, comprise skid car 1, described skid car is provided with water bath type gasifier 2, air-heating type gasifier 3, first liquified natural gas inlet ductwork J1, 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; Described first liquified natural gas inlet ductwork J1 is connected with the fluid inlet end 33 of described air-heating type gasifier 3; Described second liquified natural gas inlet ductwork J2 and described second gaseous natural gas export pipeline C2 are connected with the fluid inlet end 21 of water bath type gasifier 2 and gas phase outlet end 22 respectively, the gaseous phase outlet end 34 of described air-heating type gasifier 3 is connected with the burner in described water bath type gasifier 2, 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 the burner in described water bath type gasifier 2.
Described moving emergency natural gas supply system operationally, provides LNG Liquefied natural gas by liquefied natural gas transport tank car.
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 described first liquified natural gas inlet ductwork J1 and the entrance point of described second liquified natural gas inlet ductwork J2 are parallel to described liquified natural gas intake header road J; Described first gaseous natural gas export pipeline C1 and described second gaseous natural gas export pipeline C2 is 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 and liquified natural gas transport tank car be connected time, only need connect liquid natural gas transportation tank car and liquified natural gas intake header road, make the first liquified natural gas inlet ductwork J1 and the second liquified natural gas inlet ductwork J2 share one section of inlet ductwork (i.e. liquified natural gas intake header road); And only need on water bath type gasifier, offer a gaseous phase outlet and can meet air supply requirement, the first gaseous natural gas export pipeline C1 and the second gaseous natural gas export pipeline C2 is made to share one section outlet pipeline (i.e. gaseous natural gas outlet header road C), said structure design had both saved pipeline cost, was convenient to again control each pipeline.
As further improvement of this embodiment, described liquified natural gas intake header road J comprises two for transporting with liquified natural gas liquified natural gas entrance point 1A and 1B that tank car is connected.Can provide at least two liquified natural gas feed ends like this, can supply simultaneously also can mutually switch supply liquified natural gas, compared to the design only having a liquified natural gas entrance point, 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 operationally, liquified natural gas is transported tank car to be connected with liquified natural gas entrance point 1A and/or 1B by pipeline, first be communicated with liquified natural gas transport tank car and the first liquified natural gas inlet ductwork J1, precooling is carried out to whole liquified natural gas inlet ductwork, pre-coo time is 10 minutes, after precooling terminates, the fluid inlet valve 31 of slow unlatching air-heating type gasifier, liquified natural gas is made to enter air-heating type gasifier 2 by the first liquified natural gas inlet ductwork J1, the gaseous phase outlet valve 32 of air-heating type gasifier 3 is opened again after five minutes, the air pressure being set air-heating type gasifier gaseous phase outlet by pressure governor 7 is 0.2Mpa, enter the liquified natural gas gasification of air-heating type gasifier 3 for entering water bath type gasifier 2 after gaseous natural gas, after confirming that air-heating type gasifier 3 is working properly, water in the hot water combustion heating system heating water bathing gasifier 2 of open water bathing gasifier 2, after the temperature (45 DEG C) that the water temperature in water bath type gasifier 2 reaches default, open the valve 9 leading to water bath type gasifier 2 slowly as far as possible, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork J2, making liquified natural gas enter water bath type gasifier 2 gasifies as gaseous natural gas, rock gas fraction after water bath type gasifier 2 gasifies 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 water bath type gasifier, now can close the first liquified natural gas inlet ductwork J1 (closing the fluid inlet valve 31 of air-heating type gasifier), major part gaseous natural gas is communicated with city gas transmission pipeline net work by the second gaseous natural gas export pipeline C2, the supply gas pressure of the municipal combustion gas fecder system network provided according to dispatching center adjusts the pressure (being about 0.01Mpa ~ 0.05Mpa a little more than ductwork pressure) of the second gaseous natural gas export pipeline C2 by pressure governor 10, be then supplied to user and use.
Because the present embodiment gasifies mainly through water bath type gasifier 2 liquid towards rock gas, its amount of vaporization uses air-heating type gasifier to carry out the amount of vaporization that gasifies much larger than prior art, and the natural gas temperature gasified than air-heating type gasifier through the gaseous natural gas that water bath type gasifier 2 gasifies is high.The present invention first adopts air-heating type gasifier 3 liquid towards rock gas to gasify, fuel is provided to water bath type gasifier 2, the rock gas then gasified by water bath type gasifier 2 self 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 skid car, can facilitate movement, and rapidly, mobility is stronger in response.
As further improvement of this embodiment, the entrance point of described second gaseous natural gas inlet ductwork J2 is provided with the first bye-pass J21 and the second bye-pass J22 that are 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 temperature transducer in described water bath type gasifier 2 and to be located at the Emergeny Cutoff Valves 4 on described second gaseous natural gas export pipeline C2 and to be located at the pneumatic valve 5 of described second bye-pass J22.During initial air feed, first supply liquified natural gas by the first bye-pass J21 to water bath type gasifier 2, when after the amounts of pressurized gaseous of gaseous natural gas after gasifying through water bath type gasifier 2 and temperature stabilization, (pressure Ying is≤0.72Mpa, temperature Ying is≤30 DEG C), described first bye-pass J21 (i.e. throttle down 9) can be closed, open the second bye-pass J22 (namely opening pneumatic valve 5) and supply liquified natural gas to water bath type gasifier 2, owing to being provided with the pneumatic valve 5 be connected with control system on the second bye-pass J22, second gaseous natural gas export pipeline C2 is provided with the Emergeny Cutoff Valves 4 be connected with described control system, and in water bath type gasifier 2, be provided with the temperature transducer be connected with control system, therefore now can be realized automatic control of the present invention by control system, when temperature anomaly in water bath type gasifier 2, control system can cut off the second bye-pass J22 and the second gaseous natural gas export pipeline C2 automatically, guarantee this moving emergency natural gas supply security of system stable operation.
As further improvement of this embodiment, described second gaseous natural gas export pipeline C2 at least comprises two gaseous natural gas outlet end 2A and 2B for being connected with gas transmission pipeline net work.Can carry out air feed to multiple air feed nodes of gas transmission pipeline net work, flexibility ratio is higher.
As further improvement of this embodiment, described gaseous natural gas outlet header road C and the pipeline between air-heating type gasifier 3 and water bath type gasifier 2 are equipped with Safety relief valve 6.If when the gaseous pressure in described gaseous natural gas outlet header road C and the pipeline between air-heating type gasifier 3 and water bath type gasifier 2 exceeds the design pressure of pipeline, gaseous natural gas in pipeline can diffuse out by Safety relief valve 6, thus ensures 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 described second gaseous natural gas export pipeline C2.Gaseous natural gas through adding smelly after be supplied to user use.
Described liquified natural gas entrance point 1A and 1B and gaseous natural gas outlet end 2A and 2B Jun Even connects flange-connection stainless steel metal flexible pipe.
Described moving emergency natural gas supply system is provided with gas leakage detection alarm device (not marking in figure), further increases Safety performance of the present invention.
Moving emergency natural gas supply system described in the present embodiment is also equipped with the generator that power supply can be provided and the flowmeter that discharge record is provided.
The present invention has following beneficial effect: this moving emergency natural gas supply system is owing to taking technique scheme, when there is gas ductwork fault, because this air supply system is skid, maneuverability, by tractor, this air feeder is drawn to destination, toggle speed is fast, and air feed is rapid, can be incorporated to gas ductwork at short notice and carry out air feed, air demand is large, and (separate unit system can provide up to 60000m
3/ hour natural gas gasifying Processing capacity), export combustion gas gaseous phase outlet temperature higher, and temperature stabilization, transport tank car by least two ports and liquified natural gas to be connected, thus ensure that uninterrupted air feed, and because being provided with control system and gas leakage detection alarm device in this system, safe and reliable when therefore running.
Embodiment two:
See Fig. 3, because China Gas industry pipeline have employed a large amount of combustion gas plastic tubes (normally PE pipeline), and the serviceability temperature scope of plastic tube is-5 DEG C ~ 40 DEG C, and in the present invention, may be too high by water bath type gasifier outlet end gaseous natural gas temperature out, should not directly be connected with gas transmission pipeline net work.
Therefore, as a further improvement on the present invention, the present embodiment and upper embodiment's difference are:
Described moving emergency natural gas supply system also comprises the static mixer 11 be installed on described gaseous natural gas outlet header road, described second liquified natural gas inlet ductwork J2 is connected by the entrance point 111 of bypass line 12 with described static mixer 11, described first gaseous natural gas export pipeline C1 and described second gaseous state export pipeline C2 is parallel to the outlet end of described static mixer 11, described bypass tube 12 is provided with the liquified natural gas modulating valve 13 be electrically connected with described control system, described static mixer 11 outlet end is provided with the temperature transmitter 14 be electrically connected with described control system.By by water bath type gasifier 2 outlet end gaseous natural gas out and mixed by the liquified natural gas that bypass tube 12 is entered by the second liquified natural gas inlet ductwork J2, thus the gaseous natural gas temperature on gaseous natural gas outlet header road C outlet end (i.e. the outlet end of static mixer 11) can be reduced by static mixer 11.Because liquified natural gas can absorb heat by transient evaporation, the temperature of gaseous natural gas therefore can be reduced rapidly.Mixed gas is undertaken evenly twisting to mix making temperature relatively stable by static mixer, makes the temperature stabilization of the gaseous natural gas finally entering resident's gas transmission pipeline net work between-5 DEG C ~ 40 DEG C, 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) and carry out Automatic Control to the liquid natural tolerance be mixed into.The temperature signal that described control system is fed back for receiving temperature transmitter 14, the size of the valve opening of the liquified natural gas modulating valve 13 on bypass tube is regulated with reference to this signal, thus regulate the liquid natural tolerance entered in static mixer, namely by regulating the proportioning of liquified natural gas and the gaseous natural gas entered in static mixer, thus the gaseous natural gas temperature of static mixer outlet end is controlled.
Embodiment three:
See Fig. 4, in order to make the temperature of the gaseous natural gas finally supplying underground gas gas transmission pipeline net work in the scope of-5 DEG C ~ 40 DEG C, also following different from embodiment two technological schemes can be adopted, its difference is: static mixer 15 is installed on described second gaseous natural gas export pipeline C2, described second liquified natural gas inlet ductwork J2 is connected by the entrance point 151 of bypass line 16 with described static mixer 15, described bypass tube 16 is provided with the liquified natural gas modulating valve 17 be electrically connected with described control system, described static mixer 15 outlet end is provided with the temperature transmitter 18 be electrically connected with described control system.
Can by static mixer 15 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 bypass tube 16 is entered by the second liquified natural gas inlet ductwork J2, thus reduce the gaseous natural gas temperature of the second gaseous natural gas export pipeline C2 outlet end.Because liquified natural gas can absorb heat by transient evaporation, the temperature of gaseous natural gas therefore can be reduced rapidly.Mixed gas is undertaken evenly twisting to mix making temperature relatively stable by static mixer, makes the temperature stabilization of the gaseous natural gas finally entering resident's gas transmission pipeline net work between-5 DEG C ~ 40 DEG C, 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) and carry out Automatic Control to the liquid natural tolerance be mixed into.The temperature signal that described control system is fed back for receiving temperature transmitter 18, the size of the valve opening of the liquified natural gas modulating valve 17 on bypass tube 16 is regulated with reference to this signal, thus regulate the liquid natural tolerance entered in static mixer 15, namely by regulating the proportioning of liquified natural gas and the gaseous natural gas entered in static mixer 15, thus the gaseous natural gas temperature of static mixer 15 outlet end is controlled.
Embodiment four:
See Fig. 5, the present embodiment provides the moving emergency natural gas supply method of moving emergency natural gas supply system described in a kind of embodiment of employing one: comprise the following steps successively:
1A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
1B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
1C, the gaseous natural gas fraction after water bath type gasifier gasification is got back to water bath type gasifier by the first gaseous natural gas export pipeline and burnt, keep the water temperature in water bath type gasifier; Major part gaseous natural gas is communicated with city gas transmission pipeline net work by the second gaseous natural gas export pipeline, is supplied to user and uses.
Said method first adopts air-heating type gasifier liquid towards rock gas to carry out gasifying and provide fuel to water bath type gasifier, the gaseous natural gas fraction then gasified by water bath type gasifier self provides fuel to self, major part is supplied to user and uses, such mode makes moving emergency natural gas supply system provided by the invention start fast, air demand is large, the gas phase temperature of air feed is higher, more can adapt to the requirement of moving emergency air feed.
Embodiment five:
See Fig. 6, the present embodiment provides a kind of moving emergency natural gas supply method adopting moving emergency natural gas supply system described in embodiment two, comprises the following steps successively:
2A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
2B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
2C, the liquified natural gas in the second liquified natural gas inlet ductwork imported static mixer by bypass tube and carries out uniform stirring with the gaseous natural gas on gaseous natural gas outlet header road and mix;
2D, will to mix through static mixer and the gaseous natural gas fraction meeting the temperature requirement of default gets back to by the first gaseous natural gas export pipeline the water temperature that water bath type gasifier carries out burning to keep in water bath type gasifier; Most gaseous natural gas is communicated with city gas transmission pipeline net work by the second gaseous natural gas export pipeline, is supplied to user and uses.
Said method first adopts air-heating type gasifier liquid towards rock gas to carry out gasifying and provide fuel to water bath type gasifier, after the gaseous natural gas then gasified by water bath type gasifier self is lowered the temperature by static mixer, fraction provides fuel to self, major part supply user uses, such mode makes moving emergency natural gas supply system provided by the invention start fast, air demand is large, the natural gas temperature exported is stablized and meets the requirement of gas transmission pipeline net work to temperature, more can adapt to the requirement of moving emergency air feed.
Embodiment six:
See Fig. 7, the present embodiment provides a kind of moving emergency natural gas supply method adopting moving emergency natural gas supply system described in embodiment three, comprises the following steps successively:
3A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
3B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
3C, the gaseous natural gas fraction after water bath type gasifier gasification is got back to water bath type gasifier by the first gaseous natural gas export pipeline and burnt, keep the water temperature in water bath type gasifier; Most gaseous natural gas enters the second gaseous natural gas export pipeline;
3D, the liquified natural gas in the second liquified natural gas inlet ductwork imported static mixer by bypass tube and carries out uniform stirring with the gaseous natural gas on the second gaseous natural gas export pipeline and mix; After the mixed gaseous natural gas of static mixer meets the temperature requirement of default, be communicated with city gas transmission pipeline net work, be supplied to user and use.
Said method first adopts air-heating type gasifier liquid towards rock gas to carry out gasifying and provide fuel to water bath type gasifier, the gaseous natural gas fraction then gasified by water bath type gasifier self provides fuel to self, major part is used by supply user after static mixer cooling, such mode makes moving emergency natural gas supply system provided by the invention start fast, air demand is large, the natural gas temperature exported is stablized and meets the requirement of gas transmission pipeline net work to temperature, more can adapt to the requirement of moving emergency air feed.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all amendments, improvement, equivalent replacement etc. made in the spirit and principles in the present invention, all should be included in protection scope of the present invention.
Claims (10)
1. a moving emergency natural gas supply system, it is characterized in that: comprise skid car, described skid car is provided with water bath type gasifier, air-heating type gasifier, the first liquified natural gas inlet ductwork, the second liquified natural gas inlet ductwork, the first gaseous natural gas export pipeline and the second gaseous natural gas export pipeline; Described first liquified natural gas inlet ductwork is connected with the fluid inlet end of described air-heating type gasifier; Described second liquified natural gas inlet ductwork and described second gaseous natural gas export pipeline are connected with the fluid inlet end of water bath type gasifier and gas phase outlet end respectively, the gaseous phase outlet end of described air-heating type gasifier is connected with the burner in described water bath type gasifier, 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 other end is connected with the burner in described water bath type gasifier.
2. moving emergency natural gas supply system according to claim 1, is characterized in that: also comprise liquified natural gas intake header road and gaseous natural gas outlet header road; The entrance point of described first liquified natural gas inlet ductwork and the entrance point of described second liquified natural gas inlet ductwork are parallel to described liquified natural gas intake header road; Described first gaseous natural gas export pipeline and 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 system according to claim 2, is characterized in that: the entrance point of described second liquified natural gas inlet ductwork is provided with the first bye-pass and the second bye-pass that are 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 described second gaseous natural gas export pipeline and is located at the pneumatic valve of described second bye-pass.
4. moving emergency natural gas supply system according to claim 3, it is characterized in that: also comprise the static mixer be installed on described gaseous natural gas outlet header road, described second liquified natural gas inlet ductwork is connected by the entrance point of bypass line with described static mixer, described first gaseous natural gas export pipeline and 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 be electrically connected with described control system, described static mixer outlet end is provided with the temperature transmitter be electrically connected with described control system.
5. moving emergency natural gas supply system according to claim 3, it is characterized in that: also comprise the static mixer be installed on described second gaseous natural gas export pipeline, described second liquified natural gas inlet ductwork is connected by the entrance point of bypass line with described static mixer, described bypass tube is provided with the liquified natural gas modulating valve be electrically connected with described control system, and described static mixer outlet end is provided with the temperature transmitter be electrically connected with described control system.
6. the moving emergency natural gas supply system according to any one of claim 1 to 5, is characterized in that: described liquified natural gas intake header road at least comprises two for transporting with liquified natural gas the liquified natural gas entrance point that tank car is connected.
7. moving emergency natural gas supply system according to claim 6, is characterized in that: described second gaseous natural gas export pipeline at least comprises two gaseous natural gas outlet end for being connected with gas transmission pipeline net work.
8. adopt a moving emergency natural gas supply method for moving emergency natural gas supply system according to claim 1, it is characterized in that, comprise the following steps successively:
1A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
1B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
1C, the gaseous natural gas fraction after water bath type gasifier gasification is got back to water bath type gasifier by the first gaseous natural gas export pipeline and burnt, keep the water temperature in water bath type gasifier; Major part gaseous natural gas is communicated with city gas transmission pipeline net work by the second gaseous natural gas export pipeline, is supplied to user and uses.
9. adopt a moving emergency natural gas supply method for moving emergency natural gas supply system according to claim 4, it is characterized in that, comprise the following steps successively:
2A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
2B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
2C, the liquified natural gas in the second liquified natural gas inlet ductwork imported static mixer by bypass tube and carries out uniform stirring with the gaseous natural gas on gaseous natural gas outlet header road and mix;
2D, will to mix through static mixer and the gaseous natural gas fraction meeting the temperature requirement of default is got back to water bath type gasifier by the first gaseous natural gas export pipeline and burnt, keep the water temperature in water bath type gasifier; Most gaseous natural gas is communicated with city gas transmission pipeline net work by the second gaseous natural gas export pipeline, is supplied to user and uses.
10. adopt a moving emergency natural gas supply method for moving emergency natural gas supply system according to claim 5, it is characterized in that, comprise the following steps successively:
3A, liquified natural gas is passed into the first liquified natural gas inlet ductwork, make liquified natural gas enter air-heating type gasifier gasification by the first liquified natural gas inlet ductwork to be gaseous natural gas and to enter water bath type gasifier by air-heating type gasifier to burn, the water in heating water bathing gasifier;
3B, after the temperature that the water temperature in water bath type gasifier reaches default, be communicated with liquified natural gas transport tank car and the second liquified natural gas inlet ductwork, making liquified natural gas enter water bath type gasifier gasification is gaseous natural gas;
3C, the gaseous natural gas fraction after water bath type gasifier gasification is got back to water bath type gasifier by the first gaseous natural gas export pipeline and burnt, keep the water temperature in water bath type gasifier; Most gaseous natural gas enters the second gaseous natural gas export pipeline;
3D, the liquified natural gas in the second liquified natural gas inlet ductwork imported static mixer by bypass tube and carries out uniform stirring with the gaseous natural gas on the second gaseous natural gas export pipeline and mix; After the mixed gaseous natural gas of static mixer meets the temperature requirement of default, be communicated with city gas transmission pipeline net work, be supplied to user and use.
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| CN104712904B (en) * | 2015-03-13 | 2016-12-07 | 青岛新奥燃气设施开发有限公司 | LNG meets an urgent need feeder |
| CN108087722B (en) * | 2017-12-12 | 2023-08-01 | 四川华气清源科技有限公司 | Movable type LPG bottle group gasification device and gasification method thereof |
| CN117273379B (en) | 2023-10-24 | 2024-02-02 | 成都秦川物联网科技股份有限公司 | Intelligent gas emergency equipment presetting method, internet of things system and medium |
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| CN202203660U (en) * | 2011-07-21 | 2012-04-25 | 荆门宏图特种飞行器制造有限公司 | Liquefied natural gas movable container gas station |
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| JP4567849B2 (en) * | 2000-07-26 | 2010-10-20 | 三菱化工機株式会社 | Liquefied gas vaporization system using waste heat and waste heat supply method |
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| CN202203660U (en) * | 2011-07-21 | 2012-04-25 | 荆门宏图特种飞行器制造有限公司 | Liquefied natural gas movable container gas station |
| CN202561438U (en) * | 2012-03-30 | 2012-11-28 | 蚌埠高科能源装备有限公司 | Gas pipeline system for natural gas pressure regulation device |
| CN203147281U (en) * | 2013-04-15 | 2013-08-21 | 深圳市燃气集团股份有限公司 | Movable emergency natural gas supply system |
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