JP5350625B2 - Gas supply device for drive machine - Google Patents

Abstract

The system has a temperature control device (22) for maintaining a methane-poor, fluid natural gas concentrate (21) of high boiling hydrocarbons at a defined temperature. The concentrate and fluid natural gas (12) extracted from a gas container are brought in direct or indirect contact with refrigerated, liquefied natural gas (11) in a vaporization device (16) in such a manner that the concentrate and the fluid natural gas except methane of the fluid natural gas vaporize in the vaporization device, where the concentrate has the defined temperature. An independent claim is also included for a method for providing a mixer of natural-boil-off-gas and forced-boil-off-gas that are burnable in an internal combustion engine.

Description

  The present invention relates to a gas supply device for a drive machine by an internal combustion engine based on the superordinate concept of claim 1. The invention further relates to a method for producing a mixture of natural and forced vaporized gases combustible in an internal combustion engine according to the superordinate concept of claim 19.

  In a gas tanker or other vehicle using natural gas as a fuel, the natural gas is transported in a liquefied state. At that time, the temperature of the cryogenic liquefied natural gas is about −162 ° C., and the pressure is almost large. Equal to atmospheric pressure. Gas containers for containing the cryogenic liquefied natural gas to be transported are insulated at high cost. Nevertheless, it is inevitable that the natural gas being transported will warm up to some extent. Therefore, in the gas container containing the cryogenic liquefied natural gas, the natural gas is warmed and vaporized as so-called natural vaporized gas in the container. In order to counter the pressure rise caused in the gas container containing the cryogenic liquefied natural gas due to unavoidable vaporization, the natural vaporized gas is removed from the gas container. The same principle applies to stationary drive units that are equipped with gas containers for cryogenic liquefied natural gas and operate on gas.

  In Patent Document 1, natural gas that is vaporized when the inside of a gas container containing cryogenic liquefied natural gas is heated, that is, natural vaporized gas is supplied to a gas consumer, and particularly natural vaporized gas is used for driving a gas tanker. It is already known to supply gas tanker drives for this purpose. Furthermore, it is already known from this state of the art that if the amount of natural vaporized gas is not sufficient, liquid natural gas can be delivered from a gas container containing cryogenic liquefied natural gas and supplied to the vaporization mechanism.

  The natural gas sent out from the gas container containing the cryogenic liquefied natural gas is partially vaporized in the vaporization mechanism, and can be mixed with the natural vaporized gas as a so-called forced vaporized gas after vaporization. This mixture of natural vapor and forced vapor can then be supplied to a gas consumer, in particular a drive by an internal combustion engine. In previously known devices, the higher boiling components of the natural gas that do not vaporize are returned to the gas container without being utilized.

  The composition of the mixture of natural vapor and forced vapor varies depending on various conditions. However, a mixture of natural vapor and forced vapor is burned in a drive formed as an internal combustion engine, for example a diesel gas engine or an Otto gas engine, only if it has a certain degree of antiknock properties. be able to. As a measure of the antiknock properties of this mixture, the so-called methane number of the mixture can be used, which is an approximate ratio of the amount of methane to other components of a mixture of natural and forced vapors. Show. The methane number of any gas mixture can be determined by various instruments in business practice.

No known gas supply device for a drive by an internal combustion engine has been able to prepare a mixture of naturally vaporized gas and forced vaporized gas which is optimal with regard to antiknock properties. Therefore, there is a need for a gas supply device for a drive by an internal combustion engine that can prepare a mixture with optimized anti-knock properties.
International Publication No. 2005 / 058692A1 Pamphlet

  The present invention therefore provides a new gas supply device for a drive by an internal combustion engine and a new method for preparing a mixture of natural and forced vapor gases combustible in an internal combustion engine. It is based on the problem.

  This problem is solved by the gas supply device according to claim 1. The gas supply device according to the present invention includes a temperature control mechanism for maintaining a liquid natural gas concentrate composed of hydrocarbons which are poor in methane and basically heavier than methane and higher in boiling point than methane at a specified temperature. Vaporization of the liquid natural gas concentrate having the temperature of the liquid and the liquid natural gas delivered from the gas container containing the cryogenic liquefied natural gas so that only methane is vaporized from the liquid natural gas within the vaporization mechanism. Contact can be made directly or indirectly within the mechanism.

  Due to the temperature control mechanism of the gas supply device according to the present invention, a liquid natural gas concentrate consisting essentially of hydrocarbons (e.g. ethane, propane and butane) which are poor in methane and have a higher boiling point than methane is maintained at a specified temperature. Be drunk. Within the vaporization mechanism, the liquid natural gas concentrate having this defined temperature is in direct or indirect contact with liquid cryogenic natural gas delivered from a gas container containing cryogenic liquefied natural gas. . At that time, since almost only methane is vaporized from the liquid natural gas, the forced vaporized gas prepared in this way contains almost only methane, and contains hydrocarbons that are heavier than methane and have a boiling point higher than methane. There is no equivalent. Thus, the present invention provides a natural gas concentrate consisting essentially of hydrocarbons heavier than methane and having a boiling point higher than methane, as well as liquid natural gas delivered from a gas container containing cryogenic liquefied natural gas. Keep in mind that it is used to partially vaporize the gas as intended. At that time, vaporization of methane contained in the liquid natural gas is performed with almost no bubbles or droplets. By mixing the forced vaporized gas thus prepared with the natural vaporized gas, a mixture composed of the natural vaporized gas and the forced vaporized gas optimized with respect to the anti-knock property can be obtained.

  The method according to the invention for preparing a mixture of natural and forced vaporized gases combustible in a drive by an internal combustion engine is defined in claim 19.

  Preferred further forms of the invention will become apparent from the dependent claims and the following description. Embodiments of the present invention will be described in detail with reference to the drawings, but are not particularly limited thereto.

  The present invention relates to a gas supply device for a drive machine formed as an internal combustion engine, in which a cryogenic liquefied natural gas as a fuel is accommodated in a container.

  Hereinafter, the gas supply apparatus according to the present invention will be described in detail with reference to FIGS. 1 to 7. Here, FIGS. 1 to 7 show different embodiments of the gas supply apparatus according to the present invention.

  FIG. 1 shows a first embodiment of a gas supply device according to the invention for a drive machine of an internal combustion engine, wherein the drive machine shown in FIG. 1 is prepared by two engines 10. The gas supply device 1 includes two gas piping systems.

  A so-called naturally vaporized gas can be conveyed toward the engine 10 via the first gas piping system. The liquid cryogenic natural gas 12 contained in the gas container 11 containing the cryogenic liquefied natural gas is heated and vaporized by the liquid natural gas 12, whereby the gas container 11 containing the cryogenic liquefied natural gas is contained. The natural vaporized gas is generated inside, and the natural vaporized gas is discharged from the gas container 11 containing the cryogenic liquefied natural gas through the gas pipe 13 of the first gas piping system. Naturally vaporized gas can be supplied to the internal combustion engine 10 via the compressor 14 connected in the gas pipe 13. At this time, the check valve 15 disposed on the downstream side of the compressor 14 is compressed natural vaporized. The gas is prevented from flowing back into the gas container 11 containing the cryogenic liquefied natural gas.

  When the amount of the natural vaporized gas is not sufficient for the drive unit of the liquefied gas tanker prepared by the internal combustion engine 10, the second gas piping system causes the liquid from the gas container 11 containing the cryogenic liquefied natural gas to be cryogenic. Natural gas 12 can be sent out and supplied to the vaporizing mechanism 16 of the gas supply device. In the vaporization mechanism 16, the liquid natural gas sent out from the gas container 11 containing the cryogenic liquefied natural gas can be partially vaporized. Can be mixed with. A further check valve 15 prevents backflow toward the vaporization mechanism 16.

  Based on this, on the downstream side of the mixer 17, a mixture of natural and forced vaporization gas is formed, which can be temperature adjusted in the heat exchanger 18, preferably to room temperature, followed by gas It can be supplied to the adjusting section 19 or the engine 10. The excess mixture of natural vapor and forced vapor is burned in a safety mechanism 20, preferably formed as an oxidizer.

  In the embodiment of FIG. 1, a methane-poor liquid natural gas concentrate 21 is provided in the vaporizer 16 in a defined amount, where the liquid natural gas concentrate 21 is essentially a natural gas. Consists of heavy and high boiling components, mainly consisting of the hydrocarbons ethane, propane, and butane. The methane-poor liquid natural gas concentrate 21 is maintained at a specified temperature by the temperature control mechanism 22. At this time, the liquid natural gas concentrate 21 having a specified temperature in the vaporization mechanism 16 is The liquid is sent out from the gas container 11 containing the cryogenic liquefied natural gas and is regularly brought into contact with the cryogenic natural gas 12. At that time, almost only methane is vaporized from the liquid natural gas, and then this methane is discharged from the vaporization mechanism 16 as a forced vaporization gas and mixed with the natural vaporization gas at the mixing point 17.

  In the embodiment of FIG. 1, the vaporization mechanism 16 comprises an accumulator 23 for a liquid natural gas concentrate 21 that is poor in methane, in which case the temperature adjustment mechanism 22 is positioned in the accumulator 23, The natural gas concentrate 21 in the vaporization mechanism 16 is maintained at a specified temperature. The liquid natural gas 12 to be brought into contact with the natural gas concentrate 21 is sent out from the gas container 11 containing the cryogenic liquefied natural gas by the pump 24 and is supplied to the vaporizing mechanism 16 through the pipe 25 of the second gas piping system. Supplied. At that time, the check valve 26 prevents the liquid natural gas 12 delivered from the gas container 11 from flowing back into the gas container 11.

  The temperature control mechanism 22 keeps the methane-poor liquid natural gas concentrate 21 at a substantially constant temperature, which is at least the composition of the natural gas concentrate and the liquid at the desired operating temperature in the vaporization mechanism 16. It depends on the vaporization pressure of methane contained in the natural gas 12.

  In the embodiment of FIG. 1, the cryogenic liquid natural gas 12 sent out from the gas container 11 containing the cryogenic liquefied natural gas is prepared in the accumulating portion 23 of the vaporizing mechanism 16 by the injection nozzle 27a and the temperature is adjusted. The natural gas concentrate 21 is brought into direct contact, that is, introduced into the natural gas concentrate 21 with a strong driving force. At that time, only methane is vaporized from the liquid natural gas. The vaporization of methane from natural gas should be done without bubbles or droplets so that hydrocarbons heavier than methane and having a boiling point higher than methane do not enter the forced vaporization gas.

  Components of the liquid natural gas that are not vaporized in the vaporization mechanism 16 are collected in the accumulation container 23 of the vaporization mechanism 16, and thus the amount of the methane-poor natural gas concentrate 21 accommodated in the vaporization mechanism 16 is increased. The amount of the natural gas concentrate 21 accommodated in the vaporization mechanism 16 can be monitored by the water level adjustment mechanism 28. If there is too much natural gas concentrate in the vaporization mechanism 16, the natural gas concentrate is removed. Then, the gas is discharged from the vaporization mechanism 16 through the return pipe 29 of the second gas piping system, and is transported toward the gas container 11 containing the cryogenic liquefied natural gas. The natural gas concentrate is cooled in the heat exchanger 30 before returning the natural gas concentrate thus discharged into the gas container 11 containing the cryogenic liquefied natural gas. On the other hand, the liquid natural gas sent out from the gas container 11 containing the cryogenic liquefied natural gas is also introduced through the pipe 25 through the heat exchanger. Based on FIG. 1, the water level adjustment mechanism 28 opens a valve 31 incorporated on the downstream side of the heat exchanger 30 in the return pipe 29 in accordance with the amount of the natural gas concentrate 21 in the accumulation unit 23 of the vaporization mechanism 16. .

  The pressure of the forced vaporized gas can be measured via the pressure sensor 32, and the valve 33 incorporated in the pipe 25 can be opened and closed according to the pressure. When the pressure at the pressure sensor 32 decreases, the valve 33 opens widely, and a lot of liquid natural gas is introduced toward the vaporization mechanism 16. In contrast, when the pressure at the pressure sensor 32 increases, the valve 33 closes strongly.

  In the embodiment of FIG. 1, a pressure equalizing vessel 34 is attached to the upstream side of the valve 33 of the gas pipe 25, and compensation is possible by the pressure fluctuation. If the valve 33 allows liquid natural gas to pass through less than the pump 24 delivers, the liquid natural gas is routed through the valve 35 into the pressure equalization vessel 34. The pressure in the pressure equalizing vessel 34 is monitored via the pressure sensor 36, and the filling level of the pressure equalizing vessel 34 is monitored via the filling level sensor 37. At this time, the pressure in the pressure equalizing vessel 34 is monitored. And / or when the fill level exceeds a limit value, the pump 24 is switched off. On the other hand, below the limit value, the switched pump 24 can be switched on.

  The pressure homogenization vessel 34 is more preferably filled with an inert gas, for example nitrogen, together with a liquid natural gas and a small amount of vaporized natural gas, in which case the inert gas in the pressure homogenization vessel 34 is filled. The amount can be adjusted via valves 38,39. In this case, the valve 38 supplies the inert gas from the inert gas system into the pressure equalizing vessel 34. On the other hand, the valve 39 discharges the inert gas from the pressure equalizing vessel 34.

  A methane number sensor 40 is disposed on the downstream side of the heat exchanger 18, and the methane number sensor 40 can measure the methane number of a mixture composed of natural vapor gas and forced vapor gas. The methane number sensor 40 transmits the actual value of the methane number to the adjustment mechanism 41.

  The adjustment mechanism 41 has the valve 42 assigned to the temperature adjustment mechanism 22, that is, the temperature adjustment mechanism 22 in the accumulation unit 23 of the vaporization mechanism 16 according to the measured actual value and the predetermined specified value regarding the methane number. The temperature of the prepared natural gas concentrate 21 is controlled to be adapted. At that time, the temperature of the natural gas concentrate prepared in the storage container 23 is monitored by the temperature sensor 43, and the temperature sensor 43 transmits the actual value to the adjustment mechanism 41.

  According to FIG. 1, a droplet separator 44 is incorporated in the vaporization mechanism 16 by means of this droplet separator 44, which is heavier and more boiling from methane vaporized in the vaporization mechanism 16, i.e. from forced vaporization gas. Droplets consisting of high hydrocarbons can be removed, here according to FIG. 1 the droplet separator 44 is arranged below the outlet of the vaporization mechanism 16. Further, in FIG. 1, a defoamer 45 is incorporated in the vaporization mechanism 16 in order to remove bubbles from the methane vaporized in the vaporization mechanism 16.

  2-7 show a further embodiment of the gas supply device according to the invention for a drive by an internal combustion engine, where the same reference is made to the same components in order to avoid unnecessary repetition Reference is made to the embodiment of FIGS. 2-7 and will be described below with reference to the embodiment of FIG. 1 or only the details that differ from each other.

  The embodiment of FIG. 7 is different from the embodiment of FIG. 1 only in the form of coupling the pressure equalizing vessel 34 to the pipe 25 of the second gas piping system.

  In the embodiment of FIG. 1, the pressure equalization vessel 34 is connected to the gas pipe 25 through only one valve 35. On the other hand, in the embodiment of FIG. 7, two valves 46 are connected between the gas pipe 25 and the pressure equalizing vessel 34. Therefore, in the embodiment of FIG. The liquid natural gas 12 to be vaporized in the inside is constantly flowing. Based on this, in the embodiment of FIG. 7, the liquid natural gas 12 sent out from the gas container 11 containing the cryogenic liquefied natural gas can be supplied to the vaporizing mechanism 16 exclusively through the pressure equalizing container 34. On the other hand, in the embodiment of FIG. 1, the natural gas 12 sent out from the gas container 11 containing the cryogenic liquefied natural gas can be supplied to the vaporizing mechanism 16 without passing through the pressure equalizing container 34.

  In FIG. 7, liquid natural gas exits the pressure equalization vessel 34, bypasses the vaporization mechanism 16, and returns to the gas vessel 11 containing the cryogenic liquefied natural gas via a further valve 47. A bypass between the pressure equalizing vessel 34 and the gas pipe 29 can be prepared.

  The liquid cryogenic natural gas 12 sent out from the gas container 11 containing the cryogenic liquefied natural gas is collected in the accumulating portion 23 of the vaporizing mechanism 16 with a strong driving force from below through the injection nozzle 27a. Injecting into a methane-poor natural gas concentrate 21 that is conditioned is common in the embodiments of FIGS.

  On the other hand, FIG. 2 shows an embodiment of a gas supply device in which the cryogenic natural gas 12 sent from the gas container 11 containing the cryogenic liquefied natural gas is sprayed onto the natural gas concentrate 21 from above by the spray nozzle 27b. An example is shown. For all other details, the embodiment shown in FIG. 2 is consistent with the embodiment of FIG.

  FIG. 3 shows a variant of the embodiment of FIG. 2, in which at least one filling body 48 is incorporated in the vaporization mechanism 16 of the gas supply device according to the invention. In the embodiment of FIG. 3, unlike the embodiments of FIGS. 1, 2 and 7, the liquid natural gas 12 delivered from the gas container 11 containing the cryogenic liquefied natural gas is naturally supplied via the spray nozzle 27b. Rather than spraying directly on the gas concentrate 21, first one or each filler 48 is sprayed, with one or each liquid natural gas sprayed on one or each filler 48 being one or A liquid thin film is formed on the surface of each filler 48 and dropped downward, and is indirectly contacted with the temperature-controlled natural gas concentrate 21 accommodated in the accumulation portion 23 of the vaporization mechanism 16. When a droplet of liquid natural gas touches the surface of the natural gas concentrate, methane evaporates, and the methane rising from below passes through the liquid film formed on one or each of the packing bodies 48, Sometimes the droplets of concentrate carried together in the gaseous methane stream are separated by a liquid film.

  A further embodiment of the gas supply apparatus according to the present invention is shown in FIG. 4, and in the embodiment of FIG. 4, the liquid cryogenic natural gas 12 delivered from the gas container 11 containing cryogenic liquefied natural gas is sprayed. The methane-poor natural gas concentrate 21, temperature-controlled in the accumulator 23, is delivered to one or each of the fillers 48 positioned in the vaporization mechanism 16 via the nozzle 27 b and via the spray nozzle 49. Sprayed. Thus, the natural gas concentrate 21 accommodated in the accumulation part 23 of the vaporization mechanism and temperature-controlled can be sent out from the accumulation part 23 of the vaporization mechanism 16 by the pump 50, and in the meaning of rotational motion or circulation, It can be carried toward the spray nozzle 49. Based on FIG. 4, a valve 52 controlled by the adjusting mechanism 41 is incorporated in a circulation pipe 51 that leads to the spray nozzle 49. Further, in the circulation pipe 51, a temperature sensor 53 is disposed in order to detect the temperature of the temperature-adjusted natural gas concentrate immediately before the spray nozzle 49.

  Thus, in the embodiment of FIG. 4, either a partially vaporized liquid natural gas 12, on the one hand, or a methane-poor temperature-controlled natural gas concentrate 21, from the top, via the spray nozzle, Each filler 48 is sprayed. In doing so, heat conduction takes place in the liquid film formed on the surface of one or each of the packings 48, whereby the vaporized methane flows upward, while the natural gas concentrate 21 and the natural gas 12. Among them, the components that do not evaporate are dropped downward, and are accommodated in the accumulation unit 23 below one or each filler 48 in the vaporization mechanism 16.

  As an alternative to this, in the embodiment of FIG. 4, the vaporized liquid natural gas and the temperature-regulated natural gas concentrate are sprayed on one or each separate area of the surface of each packing 48. In this case, heat conduction takes place between regions of different warmth in one or each filling, and within one or each filling 48 the cryogenic liquid natural gas has a temperature. It does not mix with the conditioned natural gas concentrate. In this case, the mixing is finally performed on the surface portion of the concentrate prepared in the storage unit 23.

  A further embodiment of the gas supply device according to the invention is shown in FIG. 5 and the example of FIG. 5 basically corresponds to the example of FIG. However, in the embodiment of FIG. 5, unlike the above-described embodiment, the temperature adjustment mechanism 22 is not formed to adjust the temperature of the methane-poor natural gas concentrate in the accumulation unit 23 of the vaporization mechanism 16, The temperature adjustment mechanism 22 of the embodiment of FIG. 5 conversely adjusts the temperature of the methane-poor natural gas concentrate 21 outside the storage vessel 23, ie outside the vaporization mechanism 16. For this reason, the temperature adjustment mechanism 22 formed as a heat exchanger in FIG. 5 is incorporated in the circulation pipe 51.

  In order to prevent the natural gas concentrate 21 from being vaporized inside the heat exchanger 22 when it is warmed, a higher pressure that is dominant in the vaporization mechanism 16 is adjusted in the circulation pipe 51 via the pump 50 and the valve 52. can do. In this case, the warmed and pressurized natural gas concentrate 21 relaxes when entering the vaporization mechanism 16 and further methane is liberated at that time. This clearly improves the efficiency of the gas supply device.

  A further embodiment of the gas supply device according to the invention is shown in FIG. In the embodiment of FIG. 6, the cryogenic natural gas 12 sent out from the gas container 11 containing the cryogenic liquefied natural gas is passed through the spray nozzle 27 in the same manner as the embodiment of FIGS. 1 and 7. Then, it is sprayed on the natural gas concentrate 21 poor in methane housed in the accumulation part 23 of the vaporization mechanism 16 and controlled in temperature. Only one or each temperature-regulated methane-poor natural gas concentrate 21 is provided to the one or each packing 48 via a spray nozzle 49. The methane-poor natural gas concentrate temperature controlled through the temperature control mechanism 22 in the accumulator 23 is cooled before being delivered to one or each of the packings 48, so that the heat exchanger 54 is turned on before spraying. Through to one or each filler 48.

  As already implemented many times, the cryogenic natural gas 12 sent out from the gas container 11 containing the cryogenic liquefied natural gas is supplied to the vaporizing mechanism 16, and the temperature of the natural gas and the natural gas is adjusted at that time. The natural gas concentrate 21 comes into regular contact. The temperature of the cryogenic natural gas 12 is about −144 ° C. after the heat exchanger 30, and the temperature of the temperature-regulated natural gas concentrate 21 is about −80 ° C. In so doing, it is ensured that the pressure in the vaporization mechanism 16 does not exceed about 6.5 bar (absolute value) if the natural gas concentrate is of the proper composition. Here, up to about −80 ° C. is sufficient for preventing the freezing of the heating means of the temperature adjusting mechanism 22 for the operation of the vaporizing mechanism 16.

  Embodiments in which the features of the above-described embodiments of the gas supply device according to the invention are partially or completely combined are also conceivable. In the case of the embodiment of FIGS. 2 to 6, as in the embodiment of FIG. 7, the natural gas 12 sent out from the gas container 11 containing the cryogenic liquefied natural gas makes the pressure equalizing container constant. The pressure equalizing vessel 34 may be coupled to the gas pipe 25 so as to flow through the gas pipe 25.

  It is also conceivable to combine FIGS. 5 and 6 and use only the external heat exchanger. The circulating natural gas concentrate 21 releases heat to the supplied liquid natural gas 12, whereby the temperature in the vaporization mechanism 16 rises and at the same time the temperature difference in the heat exchanger 22 outside increases. Thereby, the performance of the gas supply device is improved in both cases.

It is a figure which shows the gas supply apparatus for the drive machines by an internal combustion engine based on 1st Example of this invention. It is a figure which shows the gas supply apparatus for the drive machines by an internal combustion engine based on 2nd Example of this invention. It is a figure which shows the gas supply apparatus for the drive machines by an internal combustion engine based on the 3rd Example of this invention. It is a figure which shows the gas supply apparatus for the drive machines by an internal combustion engine based on the 4th Example of this invention. It is a figure which shows the gas supply apparatus for the drive machines by an internal combustion engine based on the 5th Example of this invention. It is a figure which shows the gas supply apparatus for the drive machines by an internal combustion engine based on the 6th Example of this invention. It is a figure which shows the gas supply apparatus for the drive machines by an internal combustion engine based on the 7th Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Internal combustion engine 11 Gas container containing cryogenic liquefied natural gas 12 Liquid natural gas 13 Gas piping 14 Compressor 15 Check valve 16 Vaporization mechanism 17 Mixing point 18 Heat converter 19 Gas control area 20 Safety mechanism 21 Natural gas concentrate 22 Temperature control mechanism 23 Accumulator 24 Pump 25 Pipe for cryogenic liquid natural gas 26 Check valve 27a Injection nozzle 27b Spray nozzle 28 Water level adjustment mechanism 29 Return pipe 30 Heat exchanger 31 Valve 32 Pressure sensor 33 Valve 34 Uniform pressure Vessel 35 Valve 36 Pressure sensor 37 Filling level sensor 38 Valve 39 Valve 40 Methane number sensor 41 Control mechanism 42 Valve 43 Temperature sensor 44 Droplet separator 45 Defoamer 46 Valve 47 Valve 48 Filler 49 Spray nozzle 50 Pump 51 Natural Piping for gas concentrate 52 Valve 53 Degree sensor 54 heat exchanger

Claims (17)

A gas supply device for a drive unit by an internal combustion engine, which transports natural gas that is vaporized in the container containing the cryogenic liquefied natural gas as natural vaporized gas toward the drive unit When the first gas piping system and the amount of the natural vaporized gas are not sufficient for the driver, liquid natural gas is delivered from the gas container containing the cryogenic liquefied natural gas, and the gas was supplied to the gas mechanism which is a component of the supply device, as a forced vaporized gas by partially vaporized, to carry a mixture of natural gas for vaporization and forced vaporized gas toward said driving machine, wherein the natural gas for vaporization A second gas piping system to be mixed with the first gas piping system and the second gas piping system at a mixing point (17) for mixing natural vaporized gas and forced vaporized gas. Connection Temperature control mechanism (22) for maintaining a methane-poor liquid natural gas concentrate (21) consisting essentially of hydrocarbons heavier than methane and having a boiling point higher than methane And a methane number sensor (40) for measuring the methane number of the mixture downstream of the mixing point (17), wherein the measured actual value is converted into a natural gas concentrate of a methane-poor liquid. A methane number sensor (40) that communicates to an adjustment mechanism (41) that adjusts the temperature adjustment mechanism (22) according to the actual value to adapt the temperature of the liquid natural gas having a defined temperature The concentrate (21) and the liquid natural gas (12) sent out from the gas container (11) containing the cryogenic liquefied natural gas are substantially converted into methane from the liquid natural gas in the vaporization mechanism (16). As injury vaporized, the gas supply apparatus characterized by capable of directly or indirectly contact with said vaporizing mechanism (16).   The temperature regulating mechanism (22) keeps the methane-poor liquid natural gas concentrate at a predetermined temperature, wherein the temperature is liquid at least at the composition of the gas mixture and the desired operating temperature of the vaporization mechanism (16). The gas supply device according to claim 1, wherein the gas supply device depends on a vaporization pressure of methane contained in the natural gas.   3. Gas supply device according to claim 1 or 2, characterized in that components of liquid natural gas that do not evaporate in the vaporization mechanism (16) can be supplied to the natural gas concentrate.   In order to remove droplets made of hydrocarbons heavier than methane and having a boiling point higher than methane from methane vaporized in the vaporization mechanism (16), that is, forced vaporization gas, the vaporization mechanism (16) is operated by a droplet separator (44). The gas supply according to any one of claims 1 to 3, wherein the droplet separator (44) is disposed below the outlet of the vaporization mechanism (16). apparatus.   The vaporization mechanism (16) has an accumulator (23) for liquid natural gas concentrate poor in methane, at which time it is delivered from the gas container (11) containing cryogenic liquefied natural gas. Gas supply according to any one of claims 1 to 4, characterized in that the liquid natural gas thus obtained can be brought into direct contact with the natural gas concentrate collected in the accumulator (23). apparatus.   Liquid natural gas sent out from the gas container (11) containing cryogenic liquefied natural gas is collected in the accumulator (23) with a strong driving force in the natural gas concentrate having a specified temperature. 6. The gas supply device according to claim 5, wherein the vaporizing mechanism (16) contains an injection nozzle (27a) for injection.   The liquid natural gas sent out from the gas container (11) containing the cryogenic liquefied natural gas was collected in the accumulation part (23) of the vaporization mechanism (16) via the spray nozzle (27b). The gas supply device according to claim 5 or 6, wherein the natural gas concentrate can be sprayed from the upper side and / or the lower side.   In order to keep the amount of the natural gas concentrate in the accumulator (23) substantially constant, a water level adjusting mechanism (28) is incorporated in the accumulator (23) of the vaporization mechanism (16), and the accumulator ( 23) If there is too much natural gas concentrate in the gas level, the water level adjustment mechanism (28) removes excess natural gas concentrate after the natural gas concentrate has cooled, and the gas container containing cryogenic liquefied natural gas ( 11) The gas supply device according to any one of claims 5 to 7, wherein the gas supply device is returned to the inside.   The gas supply device according to any one of claims 1 to 8, wherein the vaporization mechanism (16) has at least one filler (48).   Natural gas delivered from the gas container (11) containing cryogenic liquefied natural gas can be sprayed to one or each filler (48) via a spray nozzle (27b). 10. Gas supply according to claim 9, characterized in that the sprayed natural gas forms a liquid film on the surface of each said filling body (48) from which it can be indirectly contacted with the natural gas concentrate. apparatus.   Liquid natural gas and natural gas concentrate delivered from the gas container (11) containing cryogenic liquefied natural gas are passed through different spray nozzles (27b, 49) to one or each of the fillers ( 48) The gas supply device according to claim 9, wherein the gas supply device can be sprayed onto the gas 48).   2. The defoamer (45) is included in the vaporization mechanism (16) to remove bubbles from methane vaporized in the vaporization mechanism (16), that is, forced vaporization gas. The gas supply device according to any one of 11.   In particular, depending on the amount of natural vaporized gas that can be supplied to the drive unit (10), the gas is sent from the gas container (11) containing cryogenic liquefied natural gas and partially vaporized in the vaporization mechanism (16). The gas supply device according to any one of claims 1 to 12, further comprising an adjustment mechanism for adjusting an amount of natural gas to be liquid.   Liquid natural gas can be sent out from the gas container (11) containing cryogenic liquefied natural gas via a pump (24) and supplied to the vaporization mechanism (16), and the pump (24) 14. The gas supply device according to claim 1, wherein the pressure prevailing in the vaporization mechanism (16) can be adjusted via a gas.   A pressure equalizing vessel (34) for homogenizing pressure fluctuations connected between the gas vessel (11) containing cryogenic liquefied natural gas and the vaporization mechanism (16); The gas supply device according to claim 1, wherein the gas supply device is a gas supply device.   A heat exchanger (18) for adjusting the temperature of the mixture supplied to the drive unit (10) is disposed downstream of the mixing point (17) where the natural vapor gas and the forced vapor gas are mixed. The gas supply device according to any one of claims 1 to 15, wherein a methane number sensor measures the methane number of the mixture downstream of the heat exchanger (18).   A safety mechanism (20) is connected between the heat exchanger (18) and the drive unit (10) in order to discharge an excessive mixture of natural vapor gas and forced vapor gas. The gas supply device according to claim 16.

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