JP6521689B2 - Engine system with condensed water treatment function - Google Patents

Description

  The present invention relates to a mixer that mixes intake air and fuel to generate a fuel mixture, a supercharger that compresses the intake air or fuel mixture, an intercooler that cools the fuel mixture, and an intercooler. An intercooler comprising: a fuel mixture supply pipe for supplying a fuel mixture; an engine for burning the fuel mixture cooled by the intercooler; and a fuel mixture passage for supplying the fuel mixture from the intercooler to the engine; An engine system with a condensed water processing function for processing condensed water generated by the cooling of a fuel mixture in

  In such an engine system with a condensed water processing function, a supercharger and an intercooler are provided in the intake system of the engine, and the fuel mixture in which the intake air and the fuel, which are outside air, are mixed is compressed by the supercharger. When the water is cooled in the intercooler, the condensed water generated by the condensation of the water vapor contained in the intake air is appropriately treated. That is, when such condensed water flows into the engine, a good combustion state in the combustion chamber of the engine is impeded, so the condensed water is appropriately treated so as not to flow into the combustion chamber.

  As a conventional example of such an engine system with a condensed water processing function, condensed water generated by the cooling of the fuel mixture in the intercooler is supplied to the air supply pipe as a fuel mixture passing portion for supplying the fuel mixture to the engine from the intercooler. Some have a drain trap to catch. The drain trap is formed in a cylindrical shape, and is connected to the lower portion of the air supply pipe in a state where the cylindrical axis direction is orthogonal to the pipe axis direction of the air supply pipe (for example, see Patent Document 1).

  In addition, the drain trap is provided with a communication portion at the connection portion between the drain trap and the air supply pipe, which connects the air supply pipe and the drain trap and allows condensed water to flow from the air supply pipe to the drain trap. At the side opposite to the connection with the trachea, there is a vent that is open to the atmosphere. And a spherical float valve is enclosed inside the drain trap. Thus, when a certain amount or more of condensed water is captured in the drain trap, buoyancy acts on the float valve, and the float valve closing the discharge hole is lifted to open the discharge hole, and the condensed water is discharged to the outside It is configured to be.

  In addition, when the air supply pipe becomes negative pressure, the float valve moves to the communication part side of the drain trap and closes the communication part to prevent the outside air from flowing into the air supply pipe, and when the air supply pipe becomes positive pressure The float valve is configured to move to the discharge hole side of the drain trap to close the discharge hole to prevent the fuel mixture from being discharged from the air supply pipe to the outside. Therefore, even when the air supply pipe has a negative pressure, the float valve is lifted to open the discharge hole, and the condensed water is discharged to the outside.

Japanese Patent Application Laid-Open No. 10-184471

  In the engine system with a condensed water processing function disclosed in Patent Document 1, when the air supply pipe has a negative pressure, the float valve moves to the communication portion side and the communication portion is blocked, so the condensed water is There was a risk that it would flow into the engine without being captured.

  In addition, when the air supply pipe becomes negative pressure, the float valve moves to the communication part side and the condensed water is discharged to the outside from the discharge hole, then the air supply pipe becomes positive pressure and the float valve from the communication part When moving toward the discharge hole, the float valve is in a state where neither the communicating part nor the discharge hole is closed, so the fuel mixture flowing through the air supply pipe may be discharged to the outside through the drain trap. There is.

  The present invention has been made in view of such a point, and the condensed water generated by the cooling of the intercooler is properly prevented from flowing into the engine, and the fuel mixture is discharged to the outside. An object of the present invention is to provide an engine system with a condensed water treatment function that can be avoided.

In order to achieve this object, an engine system with condensed water processing function according to the present invention is:
A mixer that mixes the intake air and the fuel to generate a fuel mixture;
A turbocharger that compresses the intake air or the fuel mixture;
An intercooler for cooling the fuel mixture;
A fuel mixture supply pipe for supplying the fuel mixture to the intercooler;
An engine that burns the fuel mixture cooled in the intercooler;
A fuel mixture passage for supplying the fuel mixture from the intercooler to the engine;
An engine system with a condensed water processing function, which processes condensed water generated by the cooling of the fuel mixture in the intercooler, wherein the characteristic configuration is
The condensed water is configured to flow from the intercooler into the fuel mixture passage.
A condensed water reservoir for permitting the condensed water to be accumulated is formed in the fuel mixture passage.
A closed condensed water storage tank which is disposed vertically below the fuel mixture passage and can store the condensed water;
A condensed water discharge pipe that connects the condensed water reservoir and the condensed water storage tank and causes the condensed water to flow from the condensed water reservoir into the condensed water storage tank;
A throttle valve provided in the fuel mixture supply pipe for adjusting the flow rate of the fuel mixture;
It is in the point provided with the supply pipe side mixed gas return piping which connects the predetermined part of the fuel mixed supply pipe between the throttle valve and the intercooler, and the condensed water storage tank.

  According to the above configuration, the fuel mixture supply pipe and the fuel mixture passage are in communication with each other through the intercooler, and the condensed water reservoir provided in the fuel mixture passage and the sealed water capable of storing condensed water And the condensed water storage tank are connected by a condensed water discharge pipe, and the predetermined position downstream of the fuel mixture flow from the condensed water storage tank and the throttle valve of the fuel mixture supply pipe is the supply pipe side mixture It is connected by return piping. Therefore, the pressure inside the fuel mixture supply pipe and the fuel mixture passage downstream of the throttle valve becomes equal to the pressure inside the condensed water storage tank.

  The condensed water storage tank is disposed below the condensed water reservoir in the vertical direction, and as described above, the pressure on the downstream side of the throttle valve, that is, the pressure of the fuel mixture flowing portion and the condensed water Since the pressure of the storage tank is equal to the pressure, the condensed water accumulated in the condensed water reservoir can be introduced into the condensed water storage tank by its own weight. In addition, even when the pressure inside the fuel mixture supply pipe and the fuel mixture passage changes due to the opening and closing of the throttle valve, the pressure downstream of the throttle valve and the pressure of the condensed water storage tank are also equal. Since it becomes pressure, it is possible to make the condensed water accumulated in the condensed water reservoir flow into the condensed water storage tank by its own weight, without being affected by the pressure change due to the opening and closing of the throttle valve.

Further, according to the above-mentioned characteristic configuration, when the condensed water flowing out from the condensed water reservoir part flows into the condensed water discharge pipe, there is a possibility that the condensed water will flow in a state where the fuel mixture is included. The fuel mixture flowing into the storage tank can be returned to the fuel mixture supply pipe by the supply pipe side mixture return pipe.
Therefore, it is possible to properly prevent the condensed water generated by the cooling of the intercooler from flowing into the engine, and also to prevent the fuel mixture from being discharged to the outside.

The further characteristic composition of the engine system with a condensed water processing function concerning the present invention is
The present invention is characterized in that a flame arrester is provided in the supply pipe side mixed gas return pipe.

  According to the above-mentioned characteristic configuration, since the flame arrestor for blocking the propagation of the flame is provided in the supply pipe side mixture return pipe, the supply pipe side mixture air return pipe between the condensed water storage tank and the mixture supply pipe Can prevent the flame from propagating. For example, even if a flame is generated in the condensed water storage tank, the generated flame can be prevented from propagating through the inside of the supply pipe side mixture return pipe to the mixture supply pipe.

The further characteristic composition of the engine system with a condensed water processing function concerning the present invention is
The fuel mixture passage is provided below the intercooler in the vertical direction, and the condensed water reservoir is a bottom of the fuel mixture passage.

  According to the above-mentioned characteristic configuration, the fuel mixture passing portion is provided vertically below the intercooler, so that the condensed water generated by the cooling of the fuel mixture in the intercooler is reduced by the weight of the condensed water as the fuel. It can be made to flow into the mixture passage. Further, since the condensed water reservoir is the bottom of the fuel mixture flowing portion, the condensed water which has flowed from the intercooler into the fuel mixture flowing portion flows to the condensed water reservoir at the bottom of the fuel mixture flowing portion by its own weight. It can be in a state of gathering. Therefore, the condensed water generated by the cooling of the intercooler can be efficiently collected in the condensed water reservoir.

The further characteristic composition of the engine system with a condensed water processing function concerning the present invention is
The fuel mixture communicating portion is formed by using a material having corrosion resistance.

  Condensed water collected in the condensed water reservoir may contain a component such as sulfur contained in the gas fuel and may be corrosive, but according to the present feature configuration, the fuel mixture air flow portion is corrosion resistant. By using the material which it has, it is possible to improve the durability of the fuel mixture passing portion.

The further characteristic composition of the engine system with a condensed water processing function concerning the present invention is
The engine is a V-type engine in which a pair of banks including a cylinder forming a combustion chamber is formed in a V-type, and the fuel mixture communication portion is provided between the pair of banks. It is in.

  According to the above-mentioned characteristic configuration, in a V-type engine in which a pair of banks including a cylinder is formed in a V-shape, in a V-shaped valley space formed between a pair of banks forming a V shape in a cross sectional view Since the fuel mixture passage portion is provided, the fuel mixture passage portion can be formed in a V-shape in cross section. As a result, the V-shaped tip can be made to function as a condensed water reservoir, so that condensed water generated by the cooling of the intercooler can be efficiently collected in the condensed water reservoir.

Schematic view of the condensed water treatment function engine system according to the implementation embodiments Schematic cross-sectional view of an engine equipped with a fuel mixture passage A schematic top view of an engine equipped with a fuel mixture passage Schematic of the engine system with a condensed water processing function concerning a reference form Schematic of the engine system with a condensed water processing function concerning another embodiment

  Hereinafter, an embodiment of an engine system with a condensed water processing function according to the present invention will be described based on the drawings. FIG. 1 shows a schematic view of an engine system with a condensed water treatment function. As shown in FIG. 1, a condensed water processing engine system 100 includes a venturi mixer 1 as a mixer that mixes intake air A with a gas fuel G as fuel to generate a fuel mixture M; and a venturi mixer 1 1, an intercooler 3 for cooling the fuel mixture M compressed in the air supply compressor 2a of the supercharger 2, the intercooler 3 for cooling the fuel mixture M compressed in the air supply compressor 2a of the supercharger 2, and And an engine 6 for burning the cooled fuel mixture M.

  Further, in the engine system 100 with a condensed water processing function, a fuel mixture supply pipe 4 for supplying the fuel mixture M from the supercharger 2 to the intercooler 3 and the fuel mixture supply pipe 4 are provided. A throttle valve 5 for adjusting the flow rate of the air M and a fuel mixture passage 7 for supplying the fuel mixture M from the intercooler 3 to the engine 6 are provided. Thus, the fuel mixture M generated in the venturi mixer 1 is compressed by the air supply compressor 2 a of the turbocharger 2, then adjusted to a predetermined flow rate through the throttle valve 5, and cooled in the intercooler 3. Then, it is led to the combustion chamber 61 (see FIGS. 2 and 3) of the engine 6.

  In the fuel supply passage 11 for introducing the gas fuel G to the venturi mixer 1, the difference between the pressure of the intake air A in the air introduction pipe 20 for introducing the intake air A to the venturi mixer 1 and the pressure of the fuel in the fuel supply passage 11 is kept constant. A differential pressure regulator 12 and a fuel flow control valve 13 for adjusting the supply amount of the gas fuel G supplied to the venturi mixer 1 to a target supply amount are provided. The degree of opening of the fuel flow control valve 13 is controlled by the control device 40, and the gas fuel G is mixed with the intake air A at an appropriate ratio. The gas fuel G is, for example, a city gas or the like.

  The throttle valve 5 is opened so as to maintain the rotational speed of the engine 6 at the target rotational speed based on the rotational speed of the engine 6 measured by the rotational speed sensor (not shown) provided in the engine 6 The degree is controlled by the controller 40 to adjust the flow rate of the fuel mixture M.

  The supercharger 2 includes an exhaust turbine 2b provided in an exhaust pipe 8 through which exhaust gas E discharged from the engine 6 flows, and a charge air compressor 2a connected to the exhaust turbine 2b and compressing the fuel mixture M. There is. The driving force of the exhaust turbine 2b, which is driven to rotate by the exhaust gas E discharged from the engine 6, is transmitted to the air supply compressor 2a, and the fuel mixture M is compressed by the air supply compressor 2a.

  The intercooler 3 cools the fuel mixture M by heat exchange with the fuel mixture M supplied from the air supply compressor 2 a of the turbocharger 2 by a heat medium flowing inside. Therefore, when the fuel mixture M is cooled in the intercooler 3, water contained in the fuel mixture M may be condensed to generate condensed water W.

  FIG. 2 shows a schematic cross-sectional view of the engine 6 provided with the fuel mixture passage 7. As shown in FIG. 2, a communication port 3 a is provided in the lower portion of the intercooler 3, and the communication port 3 a connects the intercooler 3 and the fuel mixture communication portion 7 located in the lower portion of the intercooler 3. It is configured to Thus, the condensed water W generated in the intercooler 3 and the fuel mixture M cooled in the intercooler 3 are configured to flow from the intercooler 3 into the fuel mixture passage 7.

  Further, FIG. 3 shows a schematic top view of the engine 6 provided with the fuel mixture passage 7. As shown in FIG. 2 and FIG. 3, the engine 6 is a V-type engine in which a pair of banks 63 including a cylinder 62 forming a combustion chamber 61 in which the fuel mixture M burns is formed in a V-shape. The fuel mixture communication portion 7 is provided between the pair of banks 63. Specifically, a pair of banks 63 inclined at a predetermined angle is formed in the upper portion of the cylinder block 60 of the engine 6, eight cylinders 62 are provided in each of the banks 63, and eight combustion chambers are provided in each of the banks 63. It consists of a 16-cylinder engine with 61 formed. Each combustion chamber 61 is provided with an ignition plug 65 as ignition means for igniting the fuel mixture M in the combustion chamber 61.

  Further, pistons 64 are provided vertically movable in each cylinder 62 of each bank 63, respectively. A crankshaft (not shown) is rotatably supported at a lower portion of the cylinder block 60, and each piston 64 is connected to the crankshaft via a connecting rod 66. Further, although not shown, a blow-by gas passage for connecting the crankcase where the crankshaft is located and the air supply passage portion on the upstream side of the air supply compressor 2a through which the fuel mixture M flows is made to flow the blowby gas into the air supply passage. A blow-by gas return portion is provided, which includes a flow pipe and an oil mist separator for separating mist-like oil contained in the blow-by gas in the blow-by gas flow pipe.

  On the other hand, cylinder heads 67 are fastened to the upper portions of the respective banks 63. The cylinder block 60, the piston 64 and the cylinder head 67 constitute a combustion chamber 61. An intake port 68 and an exhaust port 69 are formed on the lower surface of the cylinder head 67 at the upper part of the combustion chamber 61. An intake valve 70 and an exhaust valve 71 are provided for the intake port 68 and the exhaust port 69. .

  The intake port 68 of each cylinder head 67 is in communication with the fuel mixture passage 7. The exhaust port 69 communicates with a collective exhaust passage 72 in which the exhaust gas E exhausted from each combustion chamber 61 is collected. Each collecting exhaust passage 72 is in communication with an exhaust pipe 8 provided with an exhaust turbine 2 b of the turbocharger 2.

  As shown in FIG. 2, the fuel mixture and flow-through portion 7 has a V-shaped cross section between the lower portion of the intercooler 3 and the bank valley portion formed between the pair of banks 63 of the cylinder block 60. It is formed in the letter valley space. Then, a flow passage bottom surface member 7 b is provided on the surface of the bank valley portion of the fuel mixture communication portion 7, and the upper surface portion of the flow passage bottom surface member 7 b is the condensed water W flowing from the intercooler 3. It is comprised so that it may become the condensed water storage part 7a which a The flow-through bottom surface member 7b is a stainless steel having corrosion resistance to the condensed water W containing components such as sulfur of the gas fuel G and heat resistance to the cylinder block 60 which becomes high temperature. And a phenolic resin.

  Specifically, the flow-through bottom surface member 7b is made of iron, and the upper surface of the flow-through bottom surface member 7b made of iron is coated with an anticorrosive paint having corrosion resistance and heat resistance. Further, for example, in the case where the fuel mixture communicating portion 7 is not provided with the flowing portion bottom surface member 7b, the surface of the bank valley portion formed between the pair of banks 63 becomes the condensed water reservoir 7a. However, in this case, the surface of the bank valley may be coated with an anticorrosive paint having corrosion resistance and heat resistance.

  Further, in the engine system 100 with a condensed water processing function, a closed type condensed water storage tank 9 which is disposed vertically below the fuel mixture passage 7 and can store condensed water W, and a condensed water reservoir The condensed water discharge pipe 10 for connecting the condensed water W containing the fuel mixture M to the condensed water storage tank 9 from the fuel mixture flowing section 7 by connecting the section 7 a and the condensed water storage tank 9, and the throttle valve 5 The fuel mixture M flowing into the condensed water storage tank 9 is connected to a predetermined portion of the fuel mixture supply pipe 4 between the fuel and the intercooler 3 and the condensed water storage tank 9 in the fuel mixture supply pipe 4 A fuel mixture return pipe 15 is provided as a supply pipe side mixture return pipe for returning to a predetermined portion.

  The fuel mixture return pipe 15 is provided with a flame arrestor 16 for preventing the propagation of a flame in the flow passage in the fuel mixture return pipe 15. The frame arrester 16 is made of, for example, a stainless steel wire mesh.

  Thus, the condensed water reservoir 7 a and the condensed water storage tank 9 are connected by the condensed water discharge pipe 10, and the flow of the fuel mixture M from the throttle valve 5 of the condensed water storage tank 9 and the fuel mixture supply pipe 4 Since a predetermined portion on the downstream side is connected by the fuel mixture return pipe 15, the pressure and condensed water in the fuel mixture supply pipe 4 and the fuel mixture flow portion 7 on the downstream side of the throttle valve 5 The pressure inside the storage tank 9 is the same pressure. Therefore, the condensed water W accumulated in the condensed water reservoir 7a can be made to flow into the condensed water storage tank 9 by its own weight. Even if there is a slight pressure difference between the pressure inside the fuel mixture passing portion 7 and the pressure inside the condensed water storage tank 9, the condensed water W accumulated in the condensed water reservoir 7a is condensed by its own weight In the case where the pressure difference is such that it can flow into the water storage tank 9, in the present embodiment, the pressure is the same.

  Moreover, when the condensed water W which flowed out from the condensed water storage part 7a flows in into the condensed water discharge pipe 10, it may flow in in the state in which the fuel mixture M is contained in the condensed water W, but condensed water storage tank 9 after that The fuel mixture M flowing into the fuel mixture can be returned to the fuel mixture supply pipe 4 by the fuel mixture return pipe 15.

  Connected to the condensed water storage tank 9 are a water level sensor 9a for detecting the water level of the condensed water W stored in the condensed water storage tank 9, and a drainage pipe 31 for discharging the condensed water W from the condensed water storage tank 9. . The drainage pipe 31 is provided with an oil water separation drainage tank 33 downstream of the drainage valve 32 for opening and closing the drainage pipe 31 and the drainage valve 32. When the water level sensor 9a reaches a predetermined water level, the controller 40 drains water. The valve 32 is opened to drain the condensed water W in the condensed water storage tank 9 to the oil water separation and drainage tank 33. In addition, a drainage pump 34 for draining the condensed water W from the oil / water separation drainage tank 33 to the outside is provided.

  In addition, since the condensed water W contains the oil contained in the gas fuel G and the water contained in the intake air A, the oil is separated from the condensed water W in the oil / water separation drainage tank 33. Are configured to drain water. Specifically, in oil / water separation and drainage tank 33, a plurality of separation chambers (not shown) for separating oil and water of condensed water W using the difference in specific gravity between oil and water of condensed water W is provided. The condensed water W from which the oil component is separated in each separation chamber is sequentially transferred to the next separation chamber to discharge the water from which the oil component is separated. Thus, by operating the drainage pump 34, the oil contained in the condensed water W is separated and drained to the outside, and the intercooler 3 treats the condensed water W generated by the cooling of the fuel mixture M. Be done.

[ Reference form]
Although not included in the scope of the present application, a reference embodiment will be described based on the drawings.
As shown in FIG. 4, the condensed water treatment function engine system according to this reference embodiment, inlet side gas mixture connecting the air inlet tube 20 for introducing the condensed water storage tank 9 to the intake air A to the venturi mixer 1 It differs from the engine system with a condensed water processing function according to the above embodiment in that a return pipe 18 is provided, and a flame arrestor 16 and a throttle valve 17 are provided in the introduction pipe side mixture return pipe 18.

In other words, the condensed water treatment function engine system according this reference embodiment, compresses the venturi mixer 1 to produce a fuel mixture M by mixing the intake air A and the gas fuel G, the intake air A or fuel mixture M The supercharger 2, the intercooler 3 for cooling the fuel mixture M, the fuel mixture supply pipe 4 for supplying the fuel mixture M to the intercooler 3, and the fuel mixture M cooled in the intercooler 3 are burned The engine 6 and a fuel mixture passage 7 for supplying the fuel mixture M from the intercooler 3 to the engine 6 are provided.

  Then, the condensed water W is configured to flow from the intercooler 3 to the fuel mixture passage 7 and a condensed water reservoir 7a is formed in the fuel mixture passage 7 to allow the condensed water W to be accumulated. The condensed water storage tank 9 is disposed vertically below the fuel mixture passage 7 and can store the condensed water W, and the condensed water storage section 7a and the condensed water storage tank 9 are connected to form condensed water. Introduction pipe side mixing which connects the condensed water discharge pipe 10 which makes W flow into the condensed water storage tank 9 from the condensed water storage part 7a, and the air introduction pipe 20 which introduces the condensed water storage tank 9 and suction air A into the venturi mixer 1 An air return pipe 18 is provided, and a flame arrestor 16 and a throttle valve 17 are provided in the inlet pipe side mixture return pipe 18.

  The flow control of the fuel mixture M flowing in the flow path is adjusted by opening and closing the flow path formed in the introduction pipe-side mixture return pipe 18 to the throttle valve 17 provided in the introduction pipe side mixture return pipe 18 A valve body is provided. Therefore, the flow rate of the fuel mixture M returned from the condensed water storage tank 9 to the air introduction pipe 20 can be adjusted.

  Further, since the flame arrestor 16 for blocking the propagation of the flame is provided in the introduction pipe side mixture return pipe 18, the introduction pipe side mixture return pipe between the condensed water storage tank 9 and the air introduction pipe 20 The flame can be prevented from propagating through 18. For example, even if a flame is generated on the condensed water storage tank 9 side of the introduction pipe side mixed gas return pipe 18, the generated flame can be prevented from propagating to the air introduction pipe 20 side. .

[Another embodiment]
Hereinafter, other embodiments will be listed.
(1) In the above embodiment, the engine 6 is a 16-cylinder V-type engine. However, the invention is not limited to this. The engine 6 may be configured of a V-type engine having two or more cylinders other than 16 cylinders. . Further, the engine 6 may be configured by, for example, a series engine or the like other than the V-type engine.

(2) In the said embodiment, although the engine 6 was used as the gas engine which uses city gas etc. as fuel, it is not limited to this. For example, the engine 6 may be configured of a diesel engine fueled with light oil or the like, or a gasoline engine. In this case, the mixer is the Venturi mixer 1. However, the invention is not limited to this, and the fuel may be vaporized by a carburetor or the like.

(3) In the above embodiment, the venturi mixer 1 as a mixer for mixing the intake air A and the gas fuel G is provided on the upstream side of the air supply compressor 2a of the supercharger 2, but is limited thereto It is not something to be done. For example, a mixer for mixing the intake air A and the gas fuel G may be provided downstream of the charge air compressor 2 a of the turbocharger 2.

(4) In the said embodiment, although the flow-through part bottom face member 7b was formed with the phenol resin etc. which have heat resistance and corrosion resistance, it is not limited to this. For example, the flow-through bottom surface member 7b may be made of a material such as iron, and the inner surface on which the condensed water W flowing from the intercooler 3 is accumulated may be coated with a corrosive material such as a phenol resin.

(5) In the above embodiment, the mixer is the Venturi mixer 1. However, the invention is not limited to this, and the mixer may be provided with an electronically controlled injector or the like for injecting the gas fuel G. May be mixed.

(6) In the above you facilities embodiment is provided with the flame arrestor 16 to the fuel-air mixture return line 15 may be omitted this flame arrestor 16.

(7) In the above embodiment, the drainage pipe 31 for draining the condensed water W from the condensed water storage tank 9 includes the drainage valve 32 for opening and closing the drainage pipe 31 and the oil / water separation drainage tank 33 downstream of the drainage valve 32. And although the drainage pump 34 which sends out the condensed water W from the oil water separation drainage tank 33 outside was provided, as a function which processes the condensed water W, it is not limited to this. FIG. 5 is a schematic view of an engine system with a condensed water processing function according to another embodiment. As shown in FIG. 5, on the downstream side of the drainage valve 32, the drainage pipe 31 and the exhaust pipe 8 on the downstream side of the exhaust turbine 2 b of the turbocharger 2 are connected, and the drainage pipe 31 is connected to the exhaust pipe 8 A spray nozzle 8e may be provided at the connection portion, and condensed water W may be sprayed from the spray nozzle 8e and evaporated onto the exhaust gas E flowing through the exhaust pipe 8. Further, in this case, as shown in FIG. 5, an oxidation catalyst 8a that oxidizes unburned components contained in the exhaust gas E in the exhaust pipe 8 downstream of the exhaust turbine 2b and upstream of the spray nozzle 8e, and its spray nozzle A NOx removal device 8c for adding urea to the exhaust gas E downstream of 8e and decomposing nitrogen oxides contained in the exhaust gas E in the NOx removal catalyst 8b, and a boiler for burning the exhaust gas E downstream of the NOx removal catalyst 8b 8 d may be provided, and a spray nozzle 8 e for spraying the condensed water W into the exhaust gas E may be provided between the oxidation catalyst 8 a and the NOx removal device 8 c.
As described above, in the engine system with the condensed water processing function configured as described above, the fuel mixture M flowing into the condensed water storage tank 9 is set to a predetermined value of the fuel mixture supply pipe 4 by the fuel mixture return pipe 15. In addition to being able to be returned to the site, the condensed water W flowing into the condensed water storage tank 9 can also be treated in the system without being discharged to the outside.

  The configurations disclosed in the above embodiment (including the other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited thereto, and can be appropriately modified without departing from the object of the present invention.

  As described above, there is provided an engine system with a condensed water processing function that can properly prevent the condensed water generated by the cooling of the intercooler from flowing into the engine and can also prevent the fuel mixture from being discharged to the outside. Can be provided.

1 Venturi mixer (mixer)
2 supercharger 3 intercooler 4 fuel mixture supply pipe 5 throttle valve 6 engine 7 fuel mixture flow section 7a condensed water storage section 9 condensed water storage tank 10 condensed water discharge pipe 15 fuel mixture return pipe (supply pipe side mixture Air return piping)
16 flame arrester 17 throttle valve 18 inlet pipe side mixture return pipe 100 engine system with condensed water processing function A intake air G gas fuel (fuel)
M fuel mixture W condensed water

Claims (5)

A mixer that mixes the intake air and the fuel to generate a fuel mixture;
A turbocharger that compresses the intake air or the fuel mixture;
An intercooler for cooling the fuel mixture;
A fuel mixture supply pipe for supplying the fuel mixture to the intercooler;
An engine that burns the fuel mixture cooled in the intercooler;
A fuel mixture passage for supplying the fuel mixture from the intercooler to the engine;
An engine system with a condensed water processing function, which processes condensed water generated by the cooling of the fuel mixture in the intercooler,
The condensed water is configured to flow from the intercooler into the fuel mixture passage.
A condensed water reservoir for permitting the condensed water to be accumulated is formed in the fuel mixture passage.
A closed condensed water storage tank which is disposed vertically below the fuel mixture passage and can store the condensed water;
A condensed water discharge pipe that connects the condensed water reservoir and the condensed water storage tank and causes the condensed water to flow from the condensed water reservoir into the condensed water storage tank;
A throttle valve provided in the fuel mixture supply pipe for adjusting the flow rate of the fuel mixture;
An engine with a condensed water processing function provided with a supply pipe side mixed gas return pipe connecting a predetermined portion of the fuel mixture supply pipe between the throttle valve and the intercooler and the condensed water storage tank system. The engine system with a condensed water processing function according to claim 1, wherein a flame arrester is provided in the supply pipe side mixture return pipe . The condensed water processing function according to claim 1 or 2, wherein the fuel mixture passage is provided below the intercooler in the vertical direction, and the condensed water reservoir is the bottom of the fuel mixture passage. Engine system. The engine system with a condensed water processing function according to any one of claims 1 to 3, wherein the fuel mixture communicating portion is formed using a material having corrosion resistance . The engine is a V-type engine in which a pair of banks including a cylinder forming a combustion chamber is formed in a V-type, and the fuel mixture communication portion is provided between the pair of banks. An engine system with a condensed water processing function according to any one of Items 1 to 4 .

Images