JP5281262B2 - Emulsion fuel production system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture an ultrafine emulsion fuel exhibiting stable fuel properties. <P>SOLUTION: The manufacturing system is provided with a mixing tank 12 equipped with a vibrator 11 and a mixed fuel-feeding line 13 for feeding a mixed fuel composed of fuel oil A, waste edible oil and water to the mixing tank 12 and is constituted so that an emulsion fuel is manufactured by mixing the mixed fuel fed to the mixing tank 12 via the mixed fuel-feeding line 13 by the action of cavitation generated by the vibrator 11 and that the emulsion fuel is fed to a DG engine 39 via an emulsion fuel-feeding line 14 equipped with a reserve tank 15. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an emulsion fuel production system and method for producing an emulsion fuel for a diesel engine, for example.

  Patent Documents 1 and 2 describe a technique for finely mixing waste cooking oil, fuel, water, and the like to produce an economical emulsion fuel with low pollution. The “emulsion fuel production method and apparatus” described in Patent Document 1 is based on the premise that an emulsifier is used, and fuel, water, and an emulsifier are mixed in a mixing tank by mechanical collision stirring to produce an emulsion fuel. .

  In addition, in the “emulsion fuel, its manufacturing method, and emulsion fuel drive device” described in Patent Document 2, water is mixed and dispersed in high-viscosity oil by rotating and driving a stirring blade in the fuel tank. Emulsion fuel is manufactured by mixing a mixed oil obtained by mixing fuel such as light oil, heavy oil, waste cooking oil, and kerosene into an emulsion mother liquor containing oil-encapsulated water particles in which water particles are wrapped in a highly viscous oil film.

Conventionally, a cogeneration system employing a rotating disk type as a reformer for producing emulsion fuel has been proposed.
JP 2002-294260 A JP 2001-323288 A

  However, in the emulsion fuel production method and apparatus described in Patent Document 1, the particle size of the produced emulsion fuel is as coarse as several hundreds μm, and it is uniform due to the influence of centrifugal force and the difference in specific gravity. It is difficult to produce an emulsion fuel having a stable property for a long time. In addition, an emulsifier that supplies an emulsifier is an indispensable system for the production of emulsion fuel, which increases costs.

  Further, in the emulsion fuel and the production method thereof and the emulsion fuel drive device described in Patent Document 2, since the mechanical mixing is performed by the stirring blade, the emulsion fuel has a coarse particle diameter of about several hundred μm, and the emulsion mother liquor is produced. In this case, since highly viscous oil and water having greatly different viscosities and properties are mixed, it is difficult to stabilize the properties of the emulsion fuel for a long time, and there is a possibility that a change with time may occur.

  Furthermore, in the conventional cogeneration system, the particle size of the produced emulsion fuel is as coarse as several tens of μm, and the heat input to the fuel is large, which affects the fuel characteristics. It was difficult to supply stably.

  An object of the present invention is to provide an emulsion fuel production system and method capable of producing an ultra-fine emulsion fuel having stable fuel properties, in view of the above circumstances.

An emulsion fuel production system according to the present invention includes a mixing tank provided with a vibrator, and a fuel supply line for supplying fuel and water in the fuel tank to the mixing tank, and a cavitation generated by the vibrator. In operation, the fuel and water supplied from the fuel supply line are mixed to produce emulsion fuel, and the mixing tank is connected to an emulsion fuel supply line having a reserve tank, and is manufactured in the mixing tank. The supplied emulsion fuel is supplied to the engine through the reserve tank, and a recirculation system provided with a recirculation pump is provided on the downstream side of the reserve tank of the emulsion fuel supply line and the fuel supply line via a switching valve, respectively. line is connected, the connected fuel supply line to the fuel tank, the fuel bypass line is connected via the switching valve In addition, the other end of the fuel bypass line is connected to the reserve tank downstream side of the emulsion fuel supply line, and when the system is stopped, the fuel in the fuel tank passes through the fuel bypass line and the recirculation line to the engine. The mixing tank and the reserve tank are guided to the mixing tank and the reserve tank.

Further, the emulsion fuel production method according to the present invention guides the fuel and the water to the mixing tank through a fuel supply line and the cavitation generated in the vibrator provided in the mixing tank. Emulsion fuel was produced by mixing water, and the emulsion fuel produced in the mixing tank was supplied to the engine via an emulsion fuel supply line equipped with a reserve tank, and connected to the fuel supply line when the system was stopped. A fuel bypass line for connecting the fuel supply line to the downstream side of the reserve tank of the emulsion fuel supply line, and a downstream side of the reserve tank of the emulsion fuel supply line to the fuel etc. supply line this you through the recirculation line, leading to the engine, the mixing tank and the reserve tank The one in which the features.

  According to the emulsion fuel production system and method of the present invention, the fuel and water are mixed by the action of cavitation generated by the vibrator to produce the emulsion fuel, so that the fuel properties are not deteriorated by heat input. Ultra fine emulsion fuel with stable properties can be produced.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

[A] First embodiment (FIGS. 1 to 6)
FIG. 1 is a system configuration diagram showing a first embodiment of an emulsion fuel production system according to the present invention.

  The emulsion fuel production system 10 is connected to the mixing tank 12 provided with the vibrator 11, the mixing tank 12, and supplies A heavy oil and waste cooking oil as fuel and water into the mixing tank 12 in a mixed state. A mixed fuel supply line 13 as a fuel supply line and an emulsion fuel supply line 14 connected to the mixing tank 12 and provided with a reserve tank 15 are configured.

  A premixing unit 18 having a first premixing device 16 and a second premixing device 17 is connected to the mixed fuel supply line 13.

  The first premixing device 16 serves as a fuel tank for storing A heavy oil from an A heavy oil tank 19 serving as a fuel tank for storing A heavy oil and a A heavy oil supply line 20 serving as a fuel supply line. Waste cooking oil from the waste cooking oil tank 21 is guided by a waste cooking oil supply line 22 as a fuel supply line, and these A heavy oil and waste cooking oil are premixed before mixing in the mixing tank 12 to obtain mixed oil. In the A heavy oil supply line 20, an A heavy oil supply pump 23 as a fuel supply pump, a first switching valve 24, and a check valve 25 are sequentially arranged from the upstream side. The waste cooking oil supply line 22 is sequentially provided with a waste cooking oil supply pump 26 and a check valve 25 as a fuel supply pump from the upstream side.

  In the second premixing device 17, the mixed oil premixed in the first premixing device 16 is guided by the mixed oil supply line 27 and water from the water tank 28 is guided through the water supply line 29. These mixed oils and water are premixed before mixing in the mixing tank 12 to obtain a mixed fuel. The mixed oil supply line 27 is provided with a check valve 25, and the water supply line 29 is sequentially provided with a water supply pump 30 and a check valve 25 from the upstream side.

  The first premixing device 16 and the second premixing device 17 premix the fuel and oil having a viscosity and properties close to a particle size of several hundred μm as a pretreatment step for miniaturization, This is an apparatus for reliably realizing ultra-miniaturization (several μm or less) by time processing. In the present embodiment, in the first premixing device 16 in the first stage, the A heavy oil from the A heavy oil tank 19 and the waste cooking oil from the waste cooking oil tank 21 are mixed to obtain a mixed oil, and the second stage first 2 The premixing device 17 premixes the mixed oil and water, and performs full-scale mixing in the third-stage mixing tank 12 to produce an emulsion fuel.

  When the premixing devices 16 and 17 are mixed in two liquids and three or more liquids are mixed, the mixing process of two liquids is sequentially performed in multiple stages to surely reduce the particle diameter to several hundreds of micrometers or less. The premixing devices 16 and 17 are the same as the vibrator 11 provided in the mixing tank 12, or a static device in-line mixer which is attached to a piping route and mixes using a fluid flow, or a mechanical stirring device. A mixing apparatus having the above is used.

  The first switching valve 24 alternatively guides the A heavy oil in the A heavy oil tank 19 to the first premixing device 16 or the fuel bypass line 49 (described later). The check valve 25 also prevents reverse flow of A heavy oil flowing through the A heavy oil supply line 20, waste edible oil flowing through the waste edible oil supply line 22, mixed oil flowing through the mixed oil supply line 27, and water flowing through the water supply line 29. The check valves provided in other lines function in the same manner.

  Further, the mixed fuel supply line 13 includes an air chamber 31, a drain valve 32, a check valve 25, a second switching valve 33, a pressure gauge 34, and a flow rate adjustment valve 35 from the premixing unit 18 side toward the mixing tank 12. Are sequentially arranged. The mixed fuel, which is generated in the premixing unit 18 by the mixed fuel supply line 13 and in which the A heavy oil, waste cooking oil, and water are mixed, is supplied to the mixing tank 12.

  The air chamber 31 suppresses instability of the flow rate or pressure due to the pump of the piping system (A heavy oil supply pump 23, waste cooking oil supply pump 26, water supply pump 30, etc.) and the system load, and the oil and water in the piping system. Is to provide a stable supply.

  Further, the drain valve 32 discharges the drain liquid from the mixed fuel supply line 13 and is normally closed. The same applies to the drain valves 32 provided in other systems (lines). These drain valves 32 may be provided at locations other than those shown in the drawing to facilitate the drainage of the drainage liquid, or the drainage system may be integrated into a drain tank and stored in the drain tank.

  The second switching valve 33 alternatively mixes the mixed fuel from the premixing unit 18 (the first premixing device 16 and the second premixing device 17) or the emulsion fuel flowing through the recirculation line 46 (described later). Lead to. The pressure gauge 34 measures the pressure in the mixed fuel supply line 13. The flow rate adjusting valve 35 adjusts the supply amount of the mixed fuel supplied from the mixed fuel supply line 13 to the mixing tank 12 according to the processing capacity of the mixing tank 12 and adjusts the load pressure in the mixed fuel supply line 13. To do.

  The mixing tank 12 includes a vibrator 11, a thermometer 36 and a drain valve 32. By the action of cavitation generated by the vibrator 11, the mixed fuel (A heavy oil, waste cooking oil and water) supplied from the mixed fuel supply line 13 is further mixed to produce an emulsion fuel. This emulsion fuel is an ultrafine fuel having a particle size of several μm or less. The thermometer 36 measures the temperature of the fuel (emulsion fuel) in the mixing tank 12 and the temperatures of the mixing tank 12 main body and the vibrator 11.

  The emulsion fuel supply line 14 supplies the emulsion fuel produced in the mixing tank 12 to the stationary power generator 37 through the reserve tank 15. The stationary power generation device 37 includes a DG fuel tank 38, a DG engine (diesel engine) 39, and a DG control device 40, and emulsion fuel is combusted by the DG engine 39. The stationary power generator 37 is excluded from the components of the emulsion fuel supply system 10.

  In the emulsion fuel supply line 14, a reserve tank 15, a drain valve 32, a joint portion of a fuel bypass line 49, a third switching valve 41, a DG fuel tank 38 and a DG engine 39 are sequentially arranged from the mixing tank 12 side. . A fuel return line 42 is connected between the DG engine 39 and the reserve tank 15, and surplus fuel in the DG engine 39 is returned into the reserve tank 15 via the fuel return line 42.

  The reserve tank 15 absorbs fluctuations in the supply amount of the emulsion fuel supplied from the mixing tank 12, fluctuations in the return amount of surplus fuel returned from the DG engine 39, and fluctuations in the emulsion fuel consumption in the DG engine 39. The emulsion fuel is stably supplied to the DG engine 39. The third switching valve 41 alternatively guides the emulsion fuel in the reserve tank 15 to a recirculation line 46 or a stationary power generator 37 described later.

  The reserve tank 15 is provided with a level meter 43 for measuring the liquid level of the emulsion fuel stored in the reserve tank 15. When it is detected by the level meter 43 that the liquid level in the reserve tank 15 has reached a predetermined liquid level (liquid level high), the A heavy oil supply pump 23, the waste edible oil supply pump, and the like are controlled by the control device 50 described later. 26 and the water pump 30 are stopped, and the mixed fuel supplied from the mixed fuel supply line 13 to the mixing tank 12 is shut off. As a result, only surplus fuel from the DG engine 39 is introduced into the reserve tank 15 via the fuel return line 42.

  The reserve tank 15 is provided with a backfire prevention device 44. When the reserve tank 15 is opened to the atmosphere by the backfire prevention device 44, the gas component (for example, combustible gas) supplied together with the emulsion fuel from the mixing tank 12 into the reserve tank 15 is released into the atmosphere. The pressure in the reserve tank 15 is released.

A recirculation pump 45 is disposed on the downstream side of the reserve tank 15 of the emulsion fuel supply line 14 and on the upstream side of the flow rate adjustment valve 35 of the mixed fuel supply line 13 via a third switching valve 41 and a second switching valve 33, respectively. The recirculation line 46 thus connected is connected. The recirculation line 46 operates when the emulsion fuel production system 10 is started, guides the emulsion fuel in the reserve tank 15 to the mixing tank 12, and mixes it again in the mixing tank 12.

  The recirculation line 46 includes a third switching valve 41, a recirculation pump 45, a fourth switching valve 47, a second switching valve 33, a pressure gauge 34, a flow rate adjustment valve 35, a mixing tank 12, a reserve tank 15, a drain, which will be described later. The valve 32, the joint portion of the fuel bypass line 49, and the third switching valve 41 are configured in a closed loop. The recirculation line 46 operates when the third switching valve 41 is switched to the recirculation line 46 side and the recirculation pump 45 is activated.

  A fuel agitation line 48 connected to the reserve tank 15 via a fourth switching valve 47 is connected to the recirculation line 45 downstream of the recirculation line 46. The fourth switching valve 47 alternatively guides the emulsion fuel in the recirculation line 46 to the mixed fuel supply line 13 (mixing tank 12) or the reserve tank 15. The fuel agitation line 48 returns the emulsion fuel in the reserve tank 15 to the reserve tank 15 via the recirculation line 46 and the fuel agitation line 48 when the emulsion fuel production system 10 is started or during normal operation. Stir the emulsion fuel inside.

Further, the lower end of the fuel bypass line 49 is connected to the emulsion fuel supply line 14 between the reserve tank 15 and the third switching valve 41, and one end of the fuel bypass line 49 is connected via the first switching valve 24. A heavy oil supply line 20 is connected. A check valve 25 is disposed in the fuel bypass line 49. In the fuel bypass line 49, when the emulsion fuel production system 10 is stopped, the first switching valve 24 is switched to the fuel bypass line 49 side and the A heavy oil supply pump 23 is operated, and the pure A in the A heavy oil tank 19 is operated. The heavy oil is guided to the stationary power generation device 37 and the fuel return line 42 through the fuel bypass line 49, and then the third switching valve 41 is switched from the stationary power generation device 37 side to the recirculation line 46 side, and the mixing tank 12 and the reserve Guide to tank 15. As a result, the periphery of the DG engine 39, especially the mixing tank 12 and the reserve tank 15 of the stationary power generator 37 are filled with pure A heavy oil, and the emulsion fuel with unstable properties is supplied to the DG engine 39. For example, by preventing oil and fat from adhering to the fuel system of the DG engine 39, stable operation of the DG engine is realized.

  Operation of the vibrator 11 in the mixing tank 12, A heavy oil supply pump 23, waste cooking oil supply pump 26, start / stop of the water supply pump 30 and recirculation pump 45, opening degree of the flow rate adjustment valve 35, first switching valve 24, The flow switching of the second switching valve 33, the third switching valve 41, and the fourth switching valve 47, and the DG control device 40 are remotely controlled by the control device 50. A power supply unit 52 is connected to the control device 50.

  That is, the operation of the vibrator 11 is controlled based on the set condition by the vibrator control device 51 in the a1 system, and ON / OFF control and operation state monitoring are performed by the control device 50 in the a2 system. The control device 50 performs control and power supply using the a1 system and the a2 system. The control device 50 and the vibrator control device 51 may be integrally formed.

  Further, the level meter 43 is connected to the control device 50 in the b system, the thermometer 36 is connected in the c system, the flow control valve 35 is connected in the d system, and the DG control device 40 is connected in the e system. In particular, based on the temperature information from the thermometer 36, the control device 50 controls the operation of the vibrator 11 and the opening degree of the flow rate adjustment valve 35. Further, the control device 50 controls the start / stop of the heavy fuel oil supply pump 23, the waste edible oil supply pump 26, and the water supply pump 30, for example, based on a signal from the level meter 43.

  The recirculation pump 45 is f system, the A heavy oil supply pump 23 is g system, the waste edible oil supply pump 26 is h system, and the water supply pump 30 is i system, and is connected to the control device 50. The third switching valve 41 is connected to the control device 50 in the j system, the second switching valve 33 is connected in the k system, the fourth switching valve 47 is connected in the l system, and the first switching valve 24 is connected in the m system. . The control device 50 controls the start / stop of the A heavy oil supply pump 23, the waste edible oil supply pump 26, the water supply pump 30 and the recirculation pump 45, and the flow rate setting change, and further includes the first switching valve 24 and the second switching valve. 33, the flow path switching operation of the third switching valve 41 and the fourth switching valve 47 is controlled.

  The control device 50 further includes an emergency stop switch and an automatic / manual switch (both not shown). The emergency stop switch is operated when an abnormal situation occurs to stop all the devices of the emulsion fuel production system 10, and is operated when an emergency stop mode described later is executed. Further, the automatic / manual changeover switch is switched to the automatic side, so that the emulsion fuel production system 10 enters an automatic operation mode to be described later, and the automatic operation is performed by the control device 50 of the components of the emulsion fuel production system 10, and By switching to the manual side, a manual operation mode, which will be described later, is set, and manual operation of the components of the emulsion fuel production system 10 can be performed.

  Next, the operation control mode of the emulsion fuel production system 10 will be described. This operation control mode includes [I] automatic operation mode, [II] emergency stop mode, [III] manual operation mode, and [IV] adjustment test mode.

[I] Automatic operation mode The automatic operation mode is a mode used during automatic operation, and is (a) startup (warm-up operation), (b) normal operation (fuel supply operation), and (c) reserve tank liquid level high. It consists of (d) reserve tank agitation operation, (e) stop (system protection operation), and automatically switches to (a) to (e). In addition, (a) startup (warm-up operation) and (d) reserve tank agitation operation can be operated for each sub mode.

(A) At startup (warm-up operation)
As shown in FIGS. 2 and 3, this startup is used when the emulsion fuel production system 10 is normally started. The operation at the time of automatic activation can correspond to activation at a set time by a timer, activation by a remote command, and the like.

  At the time of startup (warm-up operation), first, the switching state of the third switching valve 41 and the second switching valve 33 to the recirculation line 46 side is confirmed, and the fourth switching valve 47 is switched to the mixed fuel supply line 13 side. Check the switching status. Next, the vibrator 11 is started, the recirculation pump 45 is started, the emulsion fuel in the reserve tank 15 is guided to the mixing tank 12 through the recirculation line 46, and the emulsion fuel is remixed in the mixing tank 12. The remixed emulsion fuel is guided to the reserve tank 15.

  After the remixing, as shown in FIG. 3, the second switching valve 33 is switched to the mixed fuel supply line 13 side, the fourth switching valve 47 is switched to the reserve tank 15 side, and the pump (A heavy oil supply pump 23, The waste cooking oil supply pump 26 and the water supply pump 30) are activated. Thus, the mixed fuel is supplied from the mixed fuel supply line 13 to the mixing tank 12 via the second switching valve 33 and the emulsion fuel in the reserve tank 15 is supplied to the reserve tank via the recirculation line 46 and the fourth switching valve 47. 15 and the emulsion fuel is stirred in the reserve tank 15 to complete the start-up. After the start-up is completed, the recirculation pump 45 is stopped and the next normal operation is started.

(B) Normal operation (fuel supply operation)
During normal operation, as shown in FIG. 4, it is used for normal operation after normal startup. During normal operation (fuel supply operation), the third switching valve 41 is switched from the recirculation line 46 side to the stationary power generator 37 side, the recirculation pump 45 is stopped, and the emulsion fuel in the reserve tank 15 is stationary. The DG engine 39 of the power generation device 37 is supplied. Then, surplus fuel from the DG engine 39 is returned to the reserve tank 15 via the fuel return line 42, and fuel is continuously supplied to the DG engine 39.

(C) When the reserve tank liquid level is high When the reserve tank liquid level is high, as shown in FIG. 5, when the liquid level of the reserve tank 15 reaches a predetermined liquid level (high level), the reserve tank 15 It is used to reduce the liquid level to normal operating level.

  During the high liquid level operation of the reserve tank 15, when the liquid level high (H) of the reserve tank 15 is detected by the level meter 43, the pump (A heavy oil supply pump 23, waste cooking oil supply pump 26 and water supply) The pump 30) is stopped and the vibrator 11 is stopped. At this time, only surplus fuel from the DG engine 39 is returned to the reserve tank 15 via the fuel return line 42. When the level meter 43 detects that the liquid level in the reserve tank 15 has fallen and has reached the re-operation position, the vibrator 11 is activated, and the pumps (A heavy oil supply pump 23, waste cooking oil supply pump 26 and water supply) The pump 30) is activated and returns to normal operation.

(D) During reserve tank agitation operation This reserve tank agitation operation is the same as that at the start-up agitation operation in FIG. 3, and the emulsion fuel in the reserve tank 15 is agitated to prevent separation of the fuel. Used to maintain.

  During the reserve tank agitation operation, the fourth switching valve 47 is switched to the reserve tank 15 side, the third switching valve 41 is switched to the recirculation line 46 side, the recirculation pump 45 is activated, and the emulsion fuel in the reserve tank 15 is activated. Is stirred. After the stirring is completed, the recirculation pump 45 is stopped, the fourth switching valve 47 is switched to the mixed fuel supply line 13 side, the third switching valve 41 is switched to the stationary power generator 37 side, and the original state is restored.

(E) When stopped (system protection operation)
At the time of this stop, as shown in FIG. 6, it is used to normally end the operation of the emulsion fuel production system 10.

  At the time of this stop (system protection operation), the first switching valve 24 is switched to the fuel bypass line 49 side, and only the A heavy oil supply pump 23 is operated and the other pumps (waste cooking oil supply pump 26 and water supply pump 30) are operated. After stopping, A heavy oil is supplied to the stationary power generator 37 and to the reserve tank 15 via the fuel return line 42.

  Next, both the third switching valve 41 and the second switching valve 33 are switched to the recirculation line 46 side, the recirculation pump 45 is started, and the emulsion supply line 14 and the reserve are supplied from the recirculation line 46 through the mixing tank 12. The tank 15 is filled with A heavy oil to protect the system. Thereafter, the first switching valve 24 is switched to the first premixing device 16 side, and the A heavy oil supply pump 23 and the recirculation pump 45 are stopped. This stop operation can be performed by a timer setting or a stop operation command from the control device 50.

[II] Emergency Stop Mode This emergency stop mode is executed by operating an emergency stop switch (not shown) in the control device 50 to stop all devices when an abnormal situation occurs. When restarting, the emergency stop mode is canceled by resetting the emergency stop switch. At the time of this restart, after the operation at the start of the automatic operation mode (warm-up operation), the operation is returned to the normal operation.

[III] Manual Operation Mode In this manual operation mode, an automatic / manual changeover switch (not shown) in the control device 50 is switched to the manual side, and the component devices are manually operated independently. Used for confirmation and maintenance of individual functions, drain operation and transfer.

[IV] Adjustment Test Mode In this adjustment test mode, the linkage with the stationary power generator 37 is removed, and the emulsion fuel production system 10 is independently operated as a system configuration of the start-up stirring operation shown in FIG. The functions of various devices and systems such as the switching operation of the child 11, the pump (the A heavy oil supply pump 23, the waste edible oil supply pump 26, and the water supply pump 30) and the flow rate adjustment valve 35 are checked.

  Therefore, according to the present embodiment, the following effects (1) to (5) are obtained.

  (1) Unlike mechanical mixing, the oscillator 11 is used in the mixing tank 12 to generate cavitation in a narrow region, and the A heavy oil, waste cooking oil and water are refined and mixed, and therefore, by rapid heat input Ultra fine emerald fuel with little deterioration in fuel properties and stable fuel properties can be continuously produced and supplied to the DG engine 39 of the stationary power generator 37.

  (2) For the mixing of A heavy oil, waste cooking oil and water, premixing devices 16 and 17 are used, and premixing is performed until the particle diameter is about several hundreds of μm from those having similar properties such as viscosity, Then, since the step of further mixing in the mixing tank 12 is taken, it is possible to produce an emeraldine fuel whose particle size is refined from several μm to several hundred nanometers.

  (3) A reserve tank 15 is provided between the mixing tank 12 and the DG engine 39 of the stationary power generator 37, and the reserve tank 15 changes the supply fuel (emulsin fuel) from the mixing tank 12 and the DG engine 39. Therefore, the reserve fuel 15 can be used to stably supply the emulsion fuel to the DG engine 39.

  (4) At the start of the emulsion fuel production system 10, the emulsion fuel in the reserve tank 15 is mixed again in the mixing tank 12 by the recirculation line 46, so that the emulsion fuel that maintains a good emulsion state is sent to the DG engine 39. Can be supplied.

  (5) When the emulsion fuel production system 10 is stopped, pure fuel (A heavy oil) is supplied from the A heavy oil tank 19 through the fuel bypass line 49 and the recirculation line 46, to the stationary power generator 37, the mixing tank 12, and the reserve tank 15. Therefore, the system around the DG engine 39 and the system around the mixing tank 12 and the reserve tank 15 can be filled with the A heavy oil. For this reason, it is possible to prevent the emulsion fuel having unstable properties from being supplied to the DG engine 39, and to realize a stable operation of the DG engine 39.

[B] Second embodiment (FIG. 7)
FIG. 7 is a system configuration diagram showing a second embodiment of the emulsion fuel production system according to the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description will be simplified or omitted.

  The emulsion fuel production system 60 of the present embodiment is different from the emulsion fuel production system 10 of the first embodiment in that a plurality of switching valves (first switching valve 24, second switching valve 33, third switching valve). 41 and the fourth switching valve 47) and the flow rate setting change of a plurality of pumps (A heavy oil supply pump 23, waste cooking oil supply pump 26, water supply pump 30 and recirculation pump 45) are not performed by the control device 50. These pumps (A heavy oil supply pump 23, waste cooking oil supply pump 26, water supply pump 30 and recirculation pump 45) are started and stopped by the control device 50 via the ON / OFF switch circuit 61. It is the point comprised as follows.

  Therefore, according to the present embodiment, in addition to the same effects as the effects (1) to (5) of the first embodiment, the following effect (6) is achieved.

  (6) Changing the flow settings of various pumps (A heavy oil supply pump 23, waste cooking oil supply pump 26, water pump 30 and recirculation pump 45) and various switching valves (first switching valve 24, second switching valve 33, third Since the switching operation of the switching valve 41 and the fourth switching valve 47) is performed manually, the configuration of the control device 50 and the like is simplified, and the cost can be reduced.

[C] Third embodiment (FIG. 8)
FIG. 8 is a system configuration diagram showing a third embodiment of the emulsion fuel production system according to the present invention. In the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description will be simplified or omitted.

  The emulsion fuel production system 70 of the present embodiment differs from the emulsion fuel production system 10 of the first embodiment in that the opening control of the flow rate adjustment valve 35 and the A heavy oil and waste cooking oil are contained in the fuel tank 71. This is a point where the fuel tank 71 and the water tank 28 are temperature controlled.

  In other words, the flow rate adjustment valve 35 that adjusts the supply amount of the mixed fuel in the mixed fuel supply line 13 supplied to the mixing tank 12 includes pressure information in the mixed fuel supply line 13 measured by the pressure gauge 34 and the flow meter 72. The opening degree is controlled by the control device 50 based on at least one of the flow rate information of the emulsion fuel flowing through the emulsion fuel supply line 14 (both in the present embodiment). The flow meter 72 is connected to the emulsion fuel supply line 14.

  The pressure gauge 34 is connected to the control device 50 through the p system, and transmits pressure information of the mixed fuel supply line 13 to the control device 50. The flow meter 72 is connected to the control device 50 through the u system, and transmits flow rate information of the emulsion fuel supply line 14 to the control device 50.

  The flow rate adjusting valve 35 is supplied from the control device 50 so as to have an optimum opening degree based on the pressure information of the mixed fuel supply line 13 from the pressure gauge 34 and the flow rate information of the emulsion fuel supply line 14 of the flow meter 72. Adjusted by command. Thereby, the flow rate management for stably mixing the mixed fuel from the mixed fuel supply line 13 in the mixing tank 12 is realized.

  The fuel tank 71 is supplied with fuel in which A heavy oil and waste cooking oil are mixed in advance and stored. Therefore, in the emulsion fuel supply system 70 of the present embodiment, the mixing unit 73 need only be one stage of the second premixing device 17 that premixes the fuel in the fuel tank 71 and the water in the water tank 28. The fuel from the fuel tank 71 is guided to the second premixing device 17 through the fuel supply line 79 and is premixed with the water from the water tank 28 in the second premixing device 17.

  In the fuel supply line 79, a fuel supply pump 79A, a first switching valve 24, a pressure release valve 78 (described later), and a check valve 25 are disposed from the fuel tank 71 side. The fuel supply pump 79A is controlled by the control device 50 in the same manner as the A heavy oil supply pump 23.

  Regarding temperature management of the fuel tank 71 and the water tank 28, the temperature of the mixing tank 12, the fuel temperature in the fuel tank 71, the water temperature in the water tank 28, the atmospheric temperature of the emulsion fuel production system 70, the fuel tank 71 and the water tank Considering at least one of the temperature drop of the fluid (fuel, water, mixed fuel, emulsion fuel) flowing from 28 to the reserve tank 15 and the temperature rise by the vibrator 11 in the mixing tank 12 (all in this embodiment). Thus, the temperature of the fuel in the fuel tank 71 and the water in the water tank 28 are adjusted by a heater 74 as temperature adjusting means.

  A thermometer 75 is attached to the fuel tank 71, and a thermometer 76 is attached to the water tank 28. Fuel temperature information in the fuel tank 71 and water temperature information in the water tank 28 are sent to the control device 50 through the q system. Send.

  The heater 74 performs control and power supply for heating the fuel tank 71 and the water tank 28 individually or at the same set temperature from the control device 50 in the r system. The emulsion fuel production system 70 is provided with an ambient thermometer 77. The atmosphere thermometer 77 transmits the atmosphere temperature information of the emulsion fuel production system 70 to the control device 50 through the s system.

  In order to stably mix the mixed fuel from the mixed fuel supply line 13 in the mixing tank 12, the temperature of the mixed fuel is controlled, the viscosity of the mixed fuel is kept constant, and the fuel supplied to the mixing tank 12 is controlled. It is necessary to stabilize the flow rate.

  Therefore, the control device 50 includes the temperature information of the mixing tank 12 from the thermometer 36, the temperature information of the fuel (A heavy oil + waste cooking oil) from the thermometer 75, the temperature information of water from the thermometer 76, and the ambient thermometer 77. From the fuel tank 71 and the water tank 28 to the reserve tank 15 (fuel, water, mixed fuel, emulsion fuel) In order to optimally heat the fuel in the fuel tank 71 and the water in the water tank 28 in consideration of the temperature condition data of the measurement) and the temperature rise (previously measured) by the vibrator 11 of the mixing tank 12 To control. In summer and the like, the heater 74 can be replaced with an electronic cooling element to cool the fuel in the fuel tank 71 and the water in the water tank 28.

  Note that the pressure release valve 78 shown in FIG. 8 opens when an excessive pressure is applied to the piping system, and protects the system by lowering the pressure of the piping system. The fuel and water discharged from the pressure release valve 78 are returned to the tank (the fuel tank 71 and the water tank 28) before mixing, and are guided to a drain line (not shown) after mixing.

  Therefore, according to the present embodiment, in addition to the same effects as the effects (1) to (5) of the first embodiment, the following effect (7) is achieved.

  (7) Since the temperature of the fuel in the fuel tank 71 and the water in the water tank 28 are controlled by the heater 74 or the electronic cooling element, the viscosity of the mixed fuel in the mixed fuel supply line 13 can be kept constant. For this reason, since the mixed fuel can be supplied from the mixed fuel supply line 13 to the mixing tank 12 with a stable fuel property and flow rate, an emulsion fuel having an optimal mixing ratio can be manufactured.

[D] Fourth embodiment (FIG. 9)
FIG. 9 is a system configuration diagram showing a fourth embodiment of the emulsion fuel production system according to the present invention. In the fourth embodiment, the same parts as those in the first and third embodiments are denoted by the same reference numerals, and the description will be simplified or omitted.

  The emulsion fuel production system 80 of the present embodiment is different from the emulsion fuel production system 10 of the first embodiment in that the operation of the vibrator 11 of the mixing tank 12 is monitored by a monitoring sensor 81 and the emulsion. An emulsifier is used in the production of fuel.

  That is, the monitoring sensor 81 is a sensor for monitoring the operating state of the vibrator 11, detects at least one of vibration, sound, current, heat, and the like, and transmits it to the control device 50 in the t system. The control device 50 compares the stored operation database and the detection result at a constant sampling period, and outputs a stop command to the vibrator control device 51 or supplies power to the vibrator 11 when determining an abnormality. Is shut off to stop the vibrator 11 and the operation of the system 80 is stopped.

  The emulsifier is stored in the emulsifier tank 82 and guided to the first premixing device 16 by an emulsifier line 84 having an emulsifier pump 83 and a check valve 25. The emulsifier pump 83 is controlled by the control device 50 in the same manner as the waste edible oil supply pump 26. The emulsifier tank 82 may store the emulsifier alone, but the emulsifier tank 82 stores oil containing oil in an oil tank 85 described later, and mixes with oil in the oil tank 85 in the first premixing device 16. May be facilitated.

  The oil tank 85 stores oil such as A heavy oil or fuel in which A heavy oil and waste cooking oil are mixed. The oil in the oil tank 85 is guided to the first premixing device 16 through the oil supply line 87 in which the oil supply pump 86, the first switching valve 24, and the check valve 25 are sequentially arranged. It is mixed with the emulsifier in the mixing device 16. The oil supply pump 86 is controlled by the control device 50 in the same manner as the A heavy oil supply pump 23.

  The oil tank 85, the emulsifier tank 82, and the water tank 28 are heated collectively or independently by a heater 88, or cooled by an electronic cooling element. In the present embodiment, only the heater 83 is shown.

  A thermometer 75 is installed in the oil tank 85, a thermometer 89 is installed in the emulsifier tank 82, and a thermometer 76 is installed in the water tank 28. The temperatures of the oil, the emulsifier and the water are respectively supplied to the control device 50 through the q system. Sent. The control device 50 controls the heater 88 based on the temperature information from the thermometers 75, 89, 76, and the emulsifier in the emulsifier tank 82 is heated by the heater 88 so that the emulsifier has an optimum temperature for exhibiting performance. Adjust the temperature.

  Therefore, according to the present embodiment, the following effects (8) and (9) are obtained in addition to the same effects as the effects (1) to (5) of the first embodiment.

  (8) The monitoring sensor 81 monitors the operating state of the vibrator 11 in the mixing tank 12 so that the mixed fuel from the mixed fuel supply line 13 is stably mixed in the mixing tank 12 to produce emulsion fuel. In addition, there is an excellent effect that the vibrator 11 can be stopped quickly by detecting the abnormality of the vibrator 11.

  (9) Depending on the type of emulsifier, the optimum temperature may be different from that of the oil in the oil tank 85, but by controlling the temperature of the emulsifier in the emulsifier tank 82 independently by the heater 88 or the like, It can be mixed with oil under optimum conditions for performance.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this. For example, instead of A heavy oil, alternative fuels such as light oil, kerosene, and aviation fuel may be used. Moreover, it is good also as an emulsion fuel manufacturing system which installed multiple mixing tanks 12 and improved manufacturing capability. Further, the recirculation line 46 may have only the configuration via the mixing tank 12 without the fourth switching valve 47.

  Further, as shown by broken lines in FIG. 9, the system around the oil tank 85, the emulsifier tank 82 and the water tank 28 is disposed in the vicinity of the stationary power generation device 37, and each of the tanks is utilized by utilizing the exhaust heat of the DG engine 39. It may be configured to heat and reduce the capacity of the heater 88.

1 is a system configuration diagram showing a first embodiment of an emulsion fuel production system according to the present invention. FIG. The system diagram which shows the remixing operation at the time of system starting of the emulsion fuel manufacturing system of FIG. The system diagram which shows the stirring operation at the time of system starting of the emulsion fuel manufacturing system of FIG. The system diagram which shows the operation | movement at the time of the mixed fuel supply at the time of normal operation of the emulsion fuel manufacturing system of FIG. The system diagram which shows the operation | movement at the time of the reserve tank liquid height at the time of normal driving | operation of the emulsion fuel manufacturing system of FIG. The system diagram which shows the operation | movement at the time of the system stop in the emulsion fuel manufacturing system of FIG. The system | strain block diagram which shows 2nd Embodiment of the emulsion fuel manufacturing system which concerns on this invention. The line | wire system block diagram which shows 3rd Embodiment of the emulsion fuel manufacturing system which concerns on this invention. The system configuration | structure figure which shows 4th Embodiment of the emulsion fuel manufacturing system which concerns on this invention.

Explanation of symbols

10 Emulsion Fuel Production System 11 Vibrator 12 Mixing Tank 13 Mixed Fuel Supply Line (Fuel etc. Supply Line)
14 Emulsion fuel supply line 15 Reserve tank 13 First premixing device 17 Second premixing device 19 A heavy oil tank (fuel tank)
20 A heavy oil supply line (fuel supply line)
21 Waste cooking oil tank (fuel tank)
22 Waste cooking oil supply line (fuel supply line)
23 A heavy oil supply pump (fuel supply pump)
24 1st switching valve 26 Waste cooking oil supply pump (fuel supply pump)
28 Water tank 29 Water supply line 30 Water supply pump 33 Second switching valve 41 Third switching valve 42 Fuel return line 43 Level meter 45 Recirculation pump 46 Recirculation line 47 Fourth switching valve 48 Fuel agitation line 49 Fuel bypass line 50 Control device 60 Emulsion fuel production system 61 ON / OFF switch circuit 70 Emulsion fuel production system 71 Fuel tank 72 Flow meter 74 Heater (temperature adjusting means)
80 Emulsion fuel production system 81 Monitoring sensor 82 Emulsifier tank 88 Heater

Claims (15)

A mixing tank provided with a vibrator, and a fuel supply line for supplying the fuel and water in the fuel tank to the mixing tank;
By the action of cavitation generated by the vibrator, the fuel supplied from the fuel supply line and water are mixed to produce an emulsion fuel,
An emulsion fuel supply line having a reserve tank is connected to the mixing tank, and the emulsion fuel produced in the mixing tank is supplied to the engine via the reserve tank,
A recirculation line provided with a recirculation pump is connected to the downstream side of the reserve tank of the emulsion fuel supply line and the fuel supply line via a switching valve, respectively.
A fuel bypass line is connected to the fuel supply line connected to the fuel tank via a switching valve, and the other end of the fuel bypass line is connected to the downstream side of the reserve tank of the emulsion fuel supply line. The emulsion fuel manufacturing system, wherein the fuel in the fuel tank is guided to the engine, the mixing tank, and the reserve tank through the fuel bypass line and the recirculation line when stopped. The fuel supply line is connected to a premixing device that premixes fuel guided from a fuel tank via a fuel supply line and water guided from a water tank via a water supply line. Item 4. The emulsion fuel production system according to Item 1. The emulsion fuel production system according to claim 1, wherein surplus fuel from the engine is guided to the reserve tank via a fuel return line. The emulsion fuel production system according to claim 1, wherein the emulsion fuel in the reserve tank is configured to be remixed by being led to a mixing tank via a recirculation line when the system is started. The reserve tank is provided with a level meter for measuring the liquid level in the reserve tank, and is disposed in the fuel supply line and the water supply line when the liquid level in the reserve tank reaches a predetermined liquid level. 4. The emulsion fuel production system according to claim 3, wherein the fuel supply pump and the water supply pump are stopped and surplus fuel is guided from the engine to the reserve tank through a fuel return line. 5. A fuel agitation line leading to a reserve tank via a switching valve is connected to the downstream side of the recirculation pump of the recirculation line, and the emulsion fuel flowing in the recirculation line is guided to the reserve tank to pass through the inside of the reserve tank. The emulsion fuel production system according to claim 4, wherein the emulsion fuel production system is configured to be agitated. The operation of the vibrator of the mixing tank, the fuel supply pump of the fuel supply line, the water supply pump of the water supply line, the recirculation pump of the recirculation line and the plurality of switching valves is configured to be remotely controlled by a control device. The emulsion fuel production system according to any one of claims 1 to 6, wherein The switching operation of the plurality of switching valves and the flow setting change of the fuel supply pump, the water supply pump and the recirculation pump are manually performed, and the start and stop of each pump is controlled by the control device via the ON / OFF switch circuit. The emulsion fuel production system according to claim 7, wherein the emulsion fuel production system is configured as described above. A flow rate control valve disposed in the fuel supply line and adjusting the amount of fuel and water supplied from the fuel supply line to the mixing tank includes pressure information of the fuel supply line and the mixing tank. 2. The emulsion fuel production system according to claim 1, wherein the system is controlled based on at least one of flow rate information of the connected emulsion fuel supply line. Considering at least one of the temperature of the mixing tank, the temperature of the fuel in the fuel tank, the temperature of the water in the water tank, the atmospheric temperature, the temperature drop of the fuel or water flowing through various lines, or the temperature rise by the vibrator of the mixing tank The emulsion fuel production system according to claim 1 or 2, wherein the temperature of the fuel in the fuel tank and the water in the water tank is adjusted by a temperature adjusting means. The emulsion fuel production system according to claim 10, wherein the temperature adjusting means is a heater for heating fuel and water, and an electronic cooling element for cooling the fuel and water. The operation state of the vibrator is monitored by a monitoring sensor, and the vibrator is stopped when at least one of vibration, sound, current, and heat of the vibrator is detected and determined to be abnormal. The emulsion fuel production system according to claim 1. When an emulsifier is mixed with the fuel and water to produce an emulsion fuel, the temperature of the emulsifier is adjusted so as to be an optimum temperature for exhibiting the performance of the emulsifier. The emulsion fuel production system according to claim 1, wherein: Fuel and water are introduced into the mixing tank via a fuel supply line, and the emulsion and fuel are produced by mixing the fuel and water by the action of cavitation generated in the vibrator provided in the mixing tank.
The emulsion fuel produced in the mixing tank is supplied to the engine via an emulsion fuel supply line equipped with a reserve tank,
When the system is stopped, the fuel in the fuel tank connected to the fuel supply line is connected to the downstream side of the reserve tank of the emulsion fuel supply line. The fuel bypass line connects the fuel supply line to the reserve of the emulsion fuel supply line. Emulsion fuel manufacturing method characterized by leading to the engine, the mixing tank and the reserve tank through a recirculation line connecting the downstream side of the tank to the fuel supply line. The method for producing an emulsion fuel according to claim 14, wherein the fuel and water introduced into the mixing tank are mixed in advance in the premixing tank.

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