JP5102246B2 - Emulsion combustion mixer and mixed liquid supply system for emulsion combustion - Google Patents

Emulsion combustion mixer and mixed liquid supply system for emulsion combustion Download PDF

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JP5102246B2
JP5102246B2 JP2009099726A JP2009099726A JP5102246B2 JP 5102246 B2 JP5102246 B2 JP 5102246B2 JP 2009099726 A JP2009099726 A JP 2009099726A JP 2009099726 A JP2009099726 A JP 2009099726A JP 5102246 B2 JP5102246 B2 JP 5102246B2
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mixed liquid
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combustion
outlet
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JP2010247080A (en
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周作 古渡
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株式会社環境技研
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  The present invention relates to an emulsion combustion mixer for mixing liquid fuel and water, and an emulsion combustion mixed liquid supply system using the same.

  Conventionally, a technique called emulsion combustion is known in which water is added to a liquid fuel, mixed into an emulsion and burned. In emulsion combustion, liquid fuel particles are subdivided by the occurrence of minute steam explosions of water particles during combustion. As a result, there are advantages such as easy mixing of fuel and air, and improved combustion efficiency. It is also possible to suppress the generation of NOx.

  In order to enhance the effect of such emulsion combustion, it is preferable to sufficiently mix the liquid fuel and water in the form of an emulsion. In addition, although emulsification of liquid fuel and water can be accelerated | stimulated by using surfactant, it is preferable to mix liquid fuel and water in emulsion form without using surfactant from the point that cost can be reduced. Therefore, for example, by using reduced water (water having a reduced oxidation-reduction potential) as water to be mixed with the mechanical device or liquid fuel, the liquid fuel and water can be mixed in an emulsion form without using a surfactant. There have been proposed emulsion combustion mixers having various structures (see, for example, Patent Documents 1 and 2).

JP-A-6-319971 JP 2000-329308 A

  However, even if the conventional emulsion combustion mixer as described above is used, liquid fuel and water may not be sufficiently mixed in an emulsion state. Moreover, when reducing water was used, there also existed a problem that the cost for the production | generation of reduced water was required.

  The present invention has been made in view of the above problems, and an emulsion combustion mixer capable of sufficiently mixing liquid fuel and water into an emulsion without using a surfactant or reducing water, and It is an object to provide a mixed liquid supply system for emulsion combustion used.

  The present invention provides a tubular portion in which a mixed liquid obtained by mixing liquid fuel and water is flowed in one direction from an inlet end which is one end portion to an outlet end which is the other end portion in a substantially cylindrical body; A plurality of through-holes disposed inside the tubular portion so as to separate the inside of the portion into the inlet end side and the outlet end side, and communicated with the inlet end side and the outlet end side. An outlet that is disposed on the outlet end side with respect to the stirrer in such a shape that the inner diameter decreases from the inlet end side toward the outlet end side. An emulsion combustion mixer comprising: a side diameter-reduced taper portion; and an outlet-side inner circumferential groove portion formed along the circumferential direction on the inner peripheral surface closer to the outlet end than the outlet-side diameter-reduced taper portion. The present invention solves the above problems.

  The tubular portion has an inner diameter smaller than an inner diameter of the outlet side inner circumferential groove portion between the outlet side reduced diameter taper portion and the outlet side inner circumferential groove portion than the inlet end side of the outlet side inner circumferential groove portion. An intermediate small inner diameter portion adjacent to the reduced diameter taper portion is further provided, and the inner diameter increases discontinuously from the inlet end side to the outlet end side at the boundary between the intermediate small inner diameter portion and the outlet side inner circumferential groove portion. It is good to have the structure which is doing.

  Further, it is preferable that at least a part of the inner peripheral side surface of the outlet side inner peripheral groove portion has a tapered shape in which an inner diameter decreases from the inlet end side toward the outlet end side.

  The tubular portion further includes an inlet-side diameter-expanded taper portion that has an inner diameter that increases from the inlet end side toward the outlet end side and is disposed closer to the inlet end than the stirrer. It may be configured.

  The stirrer may be configured to have a substantially conical side surface shape in which an outer diameter and an inner diameter increase from the inlet end side toward the outlet end side.

  According to another aspect of the present invention, there is provided the emulsion combustion mixer according to any one of the above, a mixed liquid storage tank for storing the mixed liquid, and the mixed liquid from the mixed liquid storage tank to the emulsion combustion mixer. A mixed liquid supply unit for supplying the mixed liquid, and a mixed liquid return unit for returning the mixed liquid mixed in the emulsion combustion mixer to the mixed liquid storage tank. The present invention solves the above problems.

  The mixed liquid recirculation part may have a discharge part arranged in the mixed liquid storage tank so as to discharge the mixed liquid toward the bottom surface of the mixed liquid storage tank.

  Further, the discharge part of the mixed liquid reflux part is a pipe-like member whose tip is located near the bottom surface of the mixed liquid storage tank and is inclined with respect to a direction perpendicular to the bottom surface. It is good to do.

  Moreover, it is good to set it as the structure which further has the 2nd mixed liquid supply part for supplying the said mixed liquid from the said mixed liquid storage tank to a combustion instrument by making the said mixed liquid supply part into a 1st mixed liquid supply part.

  Further, the mixed liquid is directly supplied from the emulsion combustion mixer to the combustion appliance, and the mixed liquid recirculation part is the combustion appliance of the mixed liquid mixed in the emulsion combustion mixer. It is good also as a structure which refluxes the excess liquid mixture which is not supplied to the said liquid mixture storage tank.

  According to the present invention, it is possible to realize an emulsion combustion mixer and an emulsion combustion mixed liquid supply system capable of sufficiently mixing liquid fuel and water in an emulsion state without using a surfactant or reducing water.

Sectional drawing which shows the structure of the mixer for emulsion combustion which concerns on 1st Embodiment of this invention Sectional drawing which shows the shape of the exit side inner peripheral groove part of the mixer for emulsion combustion which concerns on 2nd Embodiment of this invention. Sectional drawing which shows the shape of the exit side inner peripheral groove part of the mixer for emulsion combustion which concerns on 3rd Embodiment of this invention. Sectional drawing which shows the shape of the exit side inner peripheral groove part of the mixer for emulsion combustion which concerns on 4th Embodiment of this invention. The side view including the partial cross section which shows schematic structure of the mixed liquid supply system for emulsion combustion which concerns on 5th Embodiment of this invention Plan view The perspective view which shows schematic structure of the mixed liquid supply system for emulsion combustion which concerns on 6th Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the emulsion combustion mixer 10 according to the first embodiment of the present invention is a substantially cylindrical body from an inlet end 12 </ b> A that is one end to an outlet end 12 </ b> B that is the other end. A tubular portion 12 in which a mixed liquid formed by mixing liquid fuel and water flows in one direction, and an inner side of the tubular portion 12 is separated into an inlet end 12A side and an outlet end 12B side. And a stirrer 14 formed with a plurality of through holes 14A communicating with the inlet end 12A side and the outlet end 12B side, and the tubular portion 12 has an inner diameter from the inlet end 12A side. An outlet side reduced diameter taper portion 12C disposed on the outlet end 12B side of the stirrer 14 in a shape that decreases toward the end 12B side, and an inner portion on the outlet end 12B side of the outlet side reduced diameter tapered portion 12C. Outer side inner circumference formed along the circumferential direction on the circumferential surface It is characterized by having a section 12D, a. In addition, the arrow in FIG. 1 has shown the direction through which mixed liquid flows.

  The tubular portion 12 includes a first member 16, a second member 18, a third member 20, and a fourth member 22. The first member 16, the second member 18, the third member 20, and the fourth member 22 are all cylindrical bodies, and are arranged coaxially in this order from the inlet end 12A side to the outlet end 12B side. , They are screwed together.

  The inner peripheral surface of the first member 16 includes a small inner diameter portion 16A on the inlet end 12A side, a large inner diameter portion 16B on the second member 18 side, and an inner diameter from the small inner diameter portion to the large inner diameter portion (of the inlet end 12A). The inlet side enlarged taper portion 16C is formed between the small inner diameter portion 16A and the large inner diameter portion 16B (on the inlet end 12A side than the stirrer 14) in a shape that increases from the side toward the outlet end 12B. And have. A female thread for coupling to the second member 18 is formed in the vicinity of the end of the large inner diameter portion 16B on the second member 18 side. The outer peripheral surface of the first member 16 has a stepped shape having a small outer diameter portion 16D on the inlet end 12A side and a large outer diameter portion 16E on the second member 18 side, and the small outer diameter portion 16D. Is formed with a male screw for coupling with external piping or the like.

  The second member 18 has an inner diameter that is larger than the small inner diameter portion 16A of the first member 16 and slightly smaller than the large inner diameter portion 16B. A stirrer 14 is integrally formed at the end of the second member 18 on the first member 16 side. A male screw for coupling with the first member 16 is formed on a portion of the outer peripheral surface of the second member 18 on the first member 16 side, and an end of the inner peripheral surface of the second member 18 on the third member 20 side is formed. An internal thread is formed in the vicinity of the portion for coupling with the third member 20.

  The outlet side reduced diameter taper portion 12 </ b> C is formed at the end of the inner surface of the third member 20 on the second member 18 side. Further, the portion on the outlet end 12B side (the portion between the outlet side reduced diameter tapered portion 12C and the outlet side inner peripheral groove portion 12D) of the inner peripheral surface of the third member 20 on the outlet side reduced diameter tapered portion 12C is intermediate. A small inner diameter portion 12E. The inner diameter of the intermediate small inner diameter portion 12E is constant. Further, the inner diameter of the intermediate portion 12E is equal to the inner diameter of the small inner diameter portion 16A of the first member 16. Further, a male screw for coupling with the second member 18 is formed in the vicinity of the end on the second member 18 side on the outer peripheral surface of the third member 20, and a fourth screw is formed on the portion on the fourth member 22 side on the outer peripheral surface. An external thread is formed for coupling with the member 22.

  The inner peripheral surface of the fourth member 22 is between the large inner diameter portion 22A on the third member 20 side, the small inner diameter portion 22B on the outlet end 12B side, and the large inner diameter portion 22A and the small inner diameter portion 22B (stirring). And a reduced diameter taper portion 22 </ b> C disposed on the outlet end 12 </ b> B side of the container 14. The inner diameter of the small inner diameter portion 22B is equal to the inner diameter of the small inner diameter portion 16A of the first member 16 and the inner diameter of the intermediate small inner diameter portion 12E of the third member 20. The reduced diameter taper portion 22C corresponds to the inner peripheral side surface of the outlet side inner peripheral groove portion 12D, and has an inner diameter from the large inner diameter portion 22A side to the small inner diameter portion 22B side (from the inlet end 12A side to the outlet end 12B side). A taper shape that becomes smaller toward (). On the other hand, the axial end surface of the third member 20 facing the reduced diameter tapered portion 22C is a plane perpendicular to the axial direction, and the tubular portion 12 is formed by the intermediate small inner diameter portion 12E and the outlet side inner circumferential groove portion 12D. At the boundary, the inner diameter increases discontinuously from the inlet end 12A side to the outlet end 12B side. Note that a female screw for coupling to the third member 20 is formed in the large inner diameter portion 22A. The outer peripheral surface of the fourth member 22 has a stepped shape having a large outer diameter portion 22D on the third member 20 side and a small outer diameter portion 22E on the outlet end 12B side. 22E is formed with a male screw for coupling with an external pipe or the like.

  The stirrer 14 has a shape of a substantially conical surface that increases in outer diameter and inner diameter from the inlet end 12A side toward the outlet end 12B side. Further, as described above, the stirrer 14 is integrally formed with the second member 18 constituting the tubular portion 12, and protrudes from the end portion on the inlet end 12A side of the second member 18 toward the inlet end 12A side. It is installed to do. The stirrer 14 is formed with about several dozen (for example, about 20 to 80) through holes 14A. The diameter of the through hole 14A is about several hundred μm to several mm (for example, about 0.5 to 2.0 mm).

  As the liquid fuel, for example, heavy oil, kerosene, light oil, waste oil, alcohol or dimethyl ether can be used.

  Next, the operation of the emulsion combustion mixer 10 will be described.

  In the emulsion combustion mixer 10, a mixed liquid obtained by mixing liquid fuel and water flows in one direction from the inlet end 12 </ b> A of the tubular portion 12 to the outlet end 12 </ b> B which is the other end. The mixed liquid first reaches the large inner diameter portion 16B (the inlet end 12A side of the stirrer 14) while being decelerated from the small inner diameter portion 16A of the first member 16 constituting the tubular portion 12 via the inlet-side enlarged taper portion 16C. . The mixed liquid is accelerated when passing through the through hole 14A of the stirrer 14, and the mixed liquid ejected from each through hole 14A collides with the outlet side reduced diameter tapered portion 12C while colliding and mixing with each other. Further, the mixed liquid passes through the through hole 14 </ b> A of the stirrer 14 to be in a cavitation state. As a result, the liquid mixture is remarkably agitated, the liquid fuel particles are separated, and water particles easily enter between the liquid fuel particles, and the water-in-oil emulsion of the liquid fuel and water proceeds.

  Next, the mixed liquid flows into the intermediate small inner diameter portion 12E through the outlet side reduced diameter tapered portion 12C. Also in this case, the mixed liquid is agitated by the change in the inner diameter of the tubular portion 12, and the emulsification of the liquid fuel and water further proceeds, and the separation of the liquid fuel and water is suppressed.

  Next, the mixed liquid flows into the small inner diameter portion 22B of the fourth member 22 constituting the tubular portion 12 from the intermediate small inner diameter portion 12E through the outlet side inner circumferential groove portion 12D. At this time, the mixed liquid is further stirred by a change in the inner diameter of the outlet side inner circumferential groove 12D. In particular, the inner peripheral side surface of the outlet side inner peripheral groove portion 12D has a tapered shape in which the inner diameter decreases from the inlet end 12A side toward the outlet end 12B side in the same manner as the outlet side reduced diameter tapered portion 12C. As in the outlet side reduced diameter taper portion 12C, it collides with the tapered inner peripheral side surface of the outlet side inner peripheral groove portion 12D and is remarkably stirred. Further, since the inner diameter discontinuously increases from the inlet end 12A side to the outlet end 12B side at the boundary between the intermediate small inner diameter portion 12E and the outlet side inner circumferential groove portion 12D, the mixed liquid is remarkably stirred also in this respect. The As a result, the water-in-oil emulsion of liquid fuel and water further proceeds.

  Thus, the emulsion combustion mixer 10 includes the outlet side inner circumferential groove portion 12D in addition to the inlet side enlarged diameter taper portion 16C, the stirrer 14, and the outlet side reduced diameter taper portion 12C. Can be sufficiently mixed in the form of an emulsion. For example, it is possible to sufficiently mix liquid fuel and water in the form of an emulsion without using a surfactant or reducing water.

  Next, a second embodiment of the present invention will be described.

  In the first embodiment, the diameter-reduced taper portion 22C of the fourth member 22 constituting the tubular portion 12 is close to the axial end surface facing the diameter-reduced taper portion 22C of the third member 20, and the diameter is reduced. The tapered portion 22C corresponds to substantially the entire inner peripheral side surface of the outlet side inner peripheral groove portion 12D.

  On the other hand, as shown in FIG. 2, in the second embodiment, between the reduced diameter taper portion 22 </ b> C of the fourth member 22 and the axial end surface of the third member 20 facing the reduced diameter taper portion 22 </ b> C. There is a certain gap in the axial direction, and the reduced diameter taper portion 22C constitutes only a part of the inner peripheral surface of the outlet side inner peripheral groove portion 12D, and the reduced diameter taper portion 22C on the inner peripheral surface of the outlet side inner peripheral groove portion 12D. The inner diameter of the part other than is constant. Since other configurations are the same as those in the first embodiment, the same reference numerals as those in FIG.

  Thus, the reduced diameter taper portion 22C constitutes only a part of the inner peripheral side surface of the outlet side inner peripheral groove portion 12D, and the inner diameter of the inner peripheral surface of the outlet side inner peripheral groove portion 12D other than the reduced diameter taper portion 22C is Even when it is constant, the liquid fuel and water can be sufficiently mixed in the form of an emulsion.

  Next, a third embodiment of the present invention will be described.

  In the first and second embodiments, the fourth member 22 constituting the tubular portion 12 is formed with a reduced diameter tapered portion 22C, and the reduced diameter tapered portion 22C is the entire inner peripheral side surface of the outlet side inner peripheral groove portion 12D. Or part of it.

  On the other hand, as shown in FIG. 3, in the third embodiment, the reduced diameter tapered portion 22C does not exist between the large inner diameter portion 22A and the small inner diameter portion 22B of the fourth member 22, and the inside of the outlet side The inner diameter of the inner peripheral side surface of the circumferential groove portion 12D is constant. Since other configurations are the same as those in the first and second embodiments, the same reference numerals as those in FIGS.

  Thus, even when the inner diameter of the inner peripheral side surface of the outlet side inner peripheral groove portion 12D is constant, the liquid fuel and water can be sufficiently mixed in an emulsion state.

  Next, a fourth embodiment of the present invention will be described.

  In the first embodiment, the fourth member 22 constituting the tubular portion 12 is formed with the tapered diameter-reducing taper portion 22C having a tapered shape that decreases in inner diameter from the inlet end 12A side toward the outlet end 12B side. The axial end surface of the member 20 facing the reduced diameter tapered portion 22C is a plane perpendicular to the axial direction, and the reduced diameter tapered portion 22C corresponds to substantially the entire inner peripheral side surface of the outlet side inner peripheral groove portion 12D.

  On the other hand, as shown in FIG. 4, in the fourth embodiment, there is no reduced diameter taper portion between the large inner diameter portion 22A and the small inner diameter portion 22B of the fourth member 22. On the other hand, the end portion on the outlet end 12B side of the third member 20 is formed with a taper-shaped enlarged taper portion 20A having an inner diameter that increases from the inlet end 12A side toward the outlet end 12B side. The portion 20A constitutes the inner peripheral side surface of the outlet side inner peripheral groove portion 12D.

  As described above, even when the inner peripheral side surface of the outlet-side inner peripheral groove portion 12D is the tapered diameter-expanding tapered portion 20A in which the inner diameter increases from the inlet end 12A side toward the outlet end 12B side, Water can be sufficiently mixed in the form of an emulsion.

  In addition, in the said 1st-4th embodiment, although the tubular part 12 is comprised including the 1st member 16, the 2nd member 18, the 3rd member 20, and the 4th member 22, the structure of a tubular part Is not necessarily limited to this. For example, the tubular portion may be configured by a single member. The tubular portion may be composed of two or three members. The tubular portion may be composed of five or more members.

  In the first to fourth embodiments, the stirrer 14 is integrally formed with the second member 18 constituting the tubular portion 12, but the stirrer is coupled to the tubular portion by screwing or the like. Also good.

  Further, in the first to fourth embodiments, the stirrer 14 has a substantially conical surface shape whose outer diameter and inner diameter increase from the inlet end 12A side toward the outlet end 12B side, Other shapes of agitators may be used. For example, a stirrer having a disk shape substantially perpendicular to the axial direction of the tubular portion 12 and having a through hole in the axial direction may be used.

  Next, a fifth embodiment of the present invention will be described.

  The fifth embodiment relates to a mixed liquid supply system 30 for emulsion combustion as shown in FIGS. The emulsion combustion mixed liquid supply system 30 includes the emulsion combustion mixer 10 according to any of the first to fourth embodiments, a mixed liquid storage tank 34 for storing the mixed liquid, and a mixed liquid storage tank. A first mixed liquid supply unit 36 for supplying the mixed liquid from 34 to the emulsion combustion mixer 10, and mixing for returning the mixed liquid mixed in the emulsion combustion mixer 10 to the mixed liquid storage tank 34. The liquid recirculation part 38 and the 2nd liquid mixture supply part 40 for supplying a liquid mixture from the liquid mixture storage tank 34 to the combustion instrument 32 are provided.

  Furthermore, the emulsion combustion mixed liquid supply system 30 includes a liquid fuel storage tank 42 for storing liquid fuel (before being mixed with water), and liquid fuel from the liquid fuel storage tank 42 to the mixed liquid storage tank 34. A liquid fuel supply unit 44 for supplying water and a water supply unit 46 for supplying water to the mixed liquid storage tank 34 are provided.

  The combustion appliance 32 is, for example, a burner, and is installed in a greenhouse heater, a boiler such as a hot air boiler unit, a melting furnace, an incinerator, or the like.

  The mixed liquid storage tank 34 is a substantially cylindrical can-like body, and the bottom surface 34A is substantially flat. The mixed liquid storage tank 34 includes a drain valve 34B in the vicinity of the bottom surface 34A. Further, the mixed liquid storage tank 34 includes a float sensor 48. The float sensor 48 includes a first float 48A, a second float 48B, and a third float 48C, and these three floats are arranged coaxially from top to bottom in this order. The first float 48A is used for detecting the upper limit level of the liquid level of the mixed liquid, for example. The second float 48B is used for detecting the level of the liquid level when, for example, only one of the liquid fuel and water is supplied in the initial state. The third float 48C is used for detecting the lower limit level of the liquid level of the mixed liquid, for example.

  The first mixed liquid supply unit 36 includes a valve 36A installed near the bottom surface 34A of the mixed liquid storage tank 34, a pump 36B, a pipe 36C connecting the valve 36A and the pump 36B, a pump 36B, and emulsion combustion. And a pipe 36 </ b> D for connecting the mixer 10. In FIG. 6, for convenience, the pipe 36D is indicated by a two-dot chain line.

  The mixed liquid reflux section 38 is connected to the valve 38A installed slightly above the central portion in the vertical direction of the mixed liquid storage tank 34, the pipe 38B connecting the emulsion combustion mixer 10 and the valve 38A, and the valve 38A. And a discharge portion 38C arranged in the mixed liquid storage tank 34 so as to discharge the mixed liquid toward the bottom surface 34A of the mixed liquid storage tank 34. In FIG. 6, for convenience, the pipe 38B is indicated by a two-dot chain line. The discharge part 38 </ b> C is a pipe-like member whose tip is positioned near the bottom surface 34 </ b> A of the mixed liquid storage tank 34 and is inclined with respect to a direction perpendicular to the bottom surface 34. The inclination angle of the ejection unit 38C with respect to the direction perpendicular to the bottom surface 34 (vertical direction) is, for example, 25 °.

  The second mixed liquid supply unit 40 includes a valve 40A installed slightly below the central portion in the vertical direction of the mixed liquid storage tank 34, and a pipe 40B connecting the valve 40A and the combustion instrument 32. is doing.

  The liquid fuel storage tank 42 is a substantially cylindrical can-like body similar to the mixed liquid storage tank 34.

  The liquid fuel supply unit 44 is a pipe connecting the liquid fuel storage tank 42 and the mixed liquid storage tank 34, and the discharge unit 44 </ b> A at the front end discharges the liquid fuel to the vicinity of the bottom surface 34 </ b> A of the mixed liquid storage tank 34. In the mixed liquid storage tank 34. The liquid fuel supply unit 44 includes a flow meter 44B, a stop plug 44C, and an electromagnetic valve 44D.

  The water supply unit 46 is a pipe that connects a water supply, a well, a water tank (all not shown) and the mixed liquid storage tank 34, and the discharge unit 46 </ b> A at the tip is near the upper part of the mixed liquid storage tank 34. It arrange | positions in the liquid mixture storage tank 34 so that it may discharge. Further, the water supply unit 46 includes a pressure reducing valve 46B, a flow meter 46C, a stop plug 46D, and an electromagnetic valve 46E.

  Next, the operation of the mixed liquid supply system 30 for emulsion combustion will be described.

  The mixed liquid storage tank 34 is supplied with liquid fuel from the liquid fuel storage tank 42 through the liquid fuel supply unit 44, and is supplied with water from the water supply, well, water tank, etc. through the water supply unit 46. . At this time, for example, only the liquid fuel is first supplied to the mixed liquid storage tank 34. When the second float 48B detects that the liquid fuel level has reached a predetermined level, the supply of the liquid fuel is stopped and the supply of water is started. Since water has a higher specific gravity than liquid fuel, the discharged water moves below the liquid fuel and the liquid fuel moves upward. Thereby, liquid fuel and water are stirred to some extent. When the first float 48A detects that the liquid level of the mixed liquid has reached a predetermined level, the supply of water is stopped. As a result, the liquid fuel and water are stored in the liquid fuel storage tank 42 at a predetermined mixing ratio. First, only water is supplied to the mixed liquid storage tank 34, and when the second float 48B detects that the water level has reached a predetermined level, the supply of water is stopped and the supply of liquid fuel is started. May be. Also in this case, since the specific gravity of the liquid fuel is smaller than that of water, the discharged liquid fuel moves upward, the water moves downward, and the liquid fuel and water are stirred to some extent. The supply amount of liquid fuel and water is controlled by the float sensor 48, the electromagnetic valve 44D of the liquid fuel supply unit 44, the electromagnetic valve 46E of the water supply unit 46, etc., and the mixing ratio of the liquid fuel and water can be automatically adjusted. it can. Note that the operator may manually adjust the mixing ratio of the liquid fuel and water.

  The mixed liquid stored in the mixed liquid storage tank 34 formed by mixing liquid fuel and water in this way is supplied to the emulsion combustion mixer 10 via the first mixed liquid supply unit 36, and mixed for emulsion combustion. In the vessel 10, as described in the first to fourth embodiments, the mixture is sufficiently mixed into an emulsion. The mixed liquid mixed in the emulsion state in the emulsion combustion mixer 10 is returned to the mixed liquid storage tank 34 via the mixed liquid reflux unit 38. The mixed liquid is discharged from the discharge portion 38C of the mixed liquid reflux portion 38 toward the bottom surface 34A of the mixed liquid storage tank 34, and the mixed liquid is also stirred here. In particular, since the discharge portion 38C has a tip positioned near the bottom surface 34A of the mixed liquid storage tank 34 and is inclined with respect to a direction perpendicular to the bottom surface 34, the effect of stirring the mixed liquid is enhanced. ing. This further promotes emulsification of the liquid fuel and water. Further, separation of liquid fuel and water is suppressed. As described above, the mixed liquid circulates between the mixed liquid storage tank 34 and the emulsion combustion mixer 10, whereby the mixed liquid is stored in the mixed liquid storage tank 34 while maintaining a sufficiently emulsified state. The The mixed liquid once emulsified does not easily separate into liquid fuel and water. In particular, when the mixing ratio (volume ratio) of the liquid fuel and water is about 85 (liquid fuel): 15 (water) to 90 (liquid fuel): 10 (water), the emulsified mixed liquid is the liquid fuel. The effect of suppressing re-separation into water and water is preferable.

  A part of the sufficiently emulsified mixed liquid stored in the mixed liquid storage tank 34 is supplied to the combustion instrument 32 via the second mixed liquid supply unit 40 and burned. The mixed liquid is sufficiently emulsified and the liquid fuel is made into extremely fine particles, so that it easily comes into contact with oxygen. Therefore, the generation of CO is suppressed, and complete combustion or combustion close to complete combustion can be realized.

  Note that the amount of the mixed liquid stored in the mixed liquid storage tank 34 is reduced by supplying the mixed liquid to the combustion device 32 and burning it. In order to compensate for this decrease, liquid fuel is supplied to the mixed liquid storage tank 34 from the liquid fuel storage tank 42 via the liquid fuel supply unit 44, and also from the water supply, well, water tank, etc., to the water supply unit 46. Water is supplied through For example, when the third float 48C detects that the liquid level of the mixed liquid has reached a predetermined lower limit level, supply of the liquid fuel and water to the mixed liquid storage tank 34 is started. Thereby, complete combustion or combustion close to complete combustion can be performed continuously in the combustion appliance 32.

  Next, a sixth embodiment of the present invention will be described.

  In the mixed liquid supply system 30 for emulsion combustion according to the fifth embodiment, all of the mixed liquid mixed in the emulsion combustion mixer 10 is returned to the mixed liquid storage tank 34 via the mixed liquid reflux unit 38.

  On the other hand, as shown in FIG. 7, the mixed liquid supply system 50 for emulsion combustion according to the sixth embodiment is configured so that the mixed liquid is directly supplied from the emulsion combustion mixer 10 to the combustion appliance 32. The mixed liquid recirculation unit 38 is configured to recirculate excess liquid mixture that is not supplied to the combustion appliance 32 out of the liquid mixture mixed in the emulsion combustion mixer 10 to the liquid mixture storage tank 34. In addition, the 2nd liquid mixture supply part is not provided. Since the other configuration is the same as that of the mixed liquid supply system 30 for emulsion combustion according to the fifth embodiment, the same components as those in FIGS.

  As described above, the mixed liquid is directly supplied from the emulsion combustion mixer 10 to the combustion appliance 32, and the mixed liquid recirculation unit 38 is used for the combustion among the mixed liquids mixed in the emulsion combustion mixer 10. Even when surplus mixed liquid not supplied to the instrument 32 is returned to the mixed liquid storage tank 34, the mixed liquid is sufficiently emulsified in the emulsion combustion mixer 10 and the liquid fuel is supplied to the combustion instrument 32 as ultrafine particles. Therefore, the liquid fuel and oxygen are likely to come into contact during combustion. Therefore, the generation of CO is suppressed, and complete combustion or combustion close to complete combustion can be realized.

  A combustion experiment was performed using the mixed liquid supply system 30 for emulsion combustion shown in FIGS. 5 and 6 according to the fifth embodiment. Note that the emulsion combustion mixer 10 having the configuration shown in FIG. 1 according to the first embodiment was used. The main experimental conditions are as follows.

Temperature: about 20 ℃
Wind speed: about 2m
Liquid fuel: Heavy oil A Water: Well water (non-reducing water)
Mixing ratio (volume ratio): 87 (A heavy oil): 13 (water)
Inner diameter (diameter) of the small inner diameter portions 16A and 22B and the intermediate small inner diameter portion 12E: 12 mm
Inner diameter (diameter) of large inner diameter portion 16B: 29 mm
Inner diameter (diameter) of through hole 14A of stirrer: 1 mm
Number of through holes 14A of stirrer 14: 51
Diameter of the tip flat portion of the stirrer 14: 7 mm
Inner diameter (diameter) of the second member 18: 24 mm
Inner diameter (diameter) of large inner diameter portion 22A: 27 mm
Discharge rate of pump 36B: 16.5 liters / hour Inclination angle of discharge part 38C with respect to the direction perpendicular to bottom surface 34A: 25 °
Combustion appliance 32: Greenhouse warmer HK-4025 (manufactured by Nepon Corporation)
Thermocouple for exhaust temperature measurement: Thermocouple with terminal box T08 type K (manufactured by Tokyo Thermal Engineering Co., Ltd.)
Measuring instrument: SRF106AS (manufactured by Yamatake Advanced Automation Company)

  No surfactant was used. The combustion appliance 32 was installed outdoors (not in the greenhouse). Under the above conditions, the mixed liquid was supplied to the combustion instrument 32, and the mixed liquid was burned by the combustion instrument 32 for about 2 hours. First, as a preliminary combustion, the mixed liquid was burned by the combustion appliance 32 for about 28 minutes until the exhaust temperature reached about 290 ° C. Next, the main combustion was performed. Specifically, the mixed liquid was burned by the combustion appliance 32 intermittently for about 100 minutes so that the exhaust temperature was about 260 ° C. The exhaust temperature is the temperature at the position of the exhaust port of the greenhouse warmer. In addition, about 45 liters of mixed liquid was initially stored in the mixed liquid storage tank 34, and liquid fuel and water were not replenished on the way. The exhaust gas temperature and the remaining amount of the mixed liquid in the mixed liquid storage tank 34 were measured at intervals of several minutes to several tens of minutes. The measurement results are shown in Table 1. Table 1 also shows the total consumption of the liquid mixture in the main combustion, the total consumption of the liquid fuel (A heavy oil) contained in the liquid mixture, and the average consumption of the liquid fuel in the main combustion.

[Comparative example]
In contrast to the above embodiment, only liquid fuel (A heavy oil) was supplied to the combustion appliance 32 instead of the mixed liquid. The temperature and wind speed were as follows.

Air temperature: 23 ℃
Wind speed: 0m (no wind)

  The other conditions are the same as those in the above embodiment. As in the embodiment, first, as a preliminary combustion, the mixed liquid is burned in the combustion appliance 32 for about 18 minutes until the exhaust temperature reaches about 290 ° C. It was. Next, the main combustion was performed. Specifically, the mixed liquid was burned by the combustion appliance 32 intermittently for about 105 minutes so that the exhaust temperature was about 260 ° C. Further, as in the example, the exhaust temperature and the remaining amount of liquid fuel in the mixed liquid storage tank 34 were measured at intervals of several minutes to several tens of minutes. The measurement results are shown in Table 2.

  As shown in Tables 1 and 2, although the exhaust temperature was the same as that of the comparative example, the average consumption of the liquid fuel in the example was smaller than the average consumption of the liquid fuel in the comparative example. Specifically, the liquid fuel consumption per minute in the comparative example was 0.157 liter, while the liquid fuel consumption per minute in the example was 0.142 liter. That is, the average consumption of liquid fuel in the example was about 9.6% less than the average consumption of liquid fuel in the comparative example. Thus, according to the Example of this invention, even if it did not use surfactant or reducing water, it was confirmed that the effect of the combustion efficiency improvement of emulsion combustion is acquired.

  The present invention can be used for, for example, a greenhouse heater, a boiler, a melting furnace, an incinerator, and the like.

DESCRIPTION OF SYMBOLS 10 ... Mixer for emulsion combustion 12 ... Tubular part 12A ... Inlet end 12B ... Outlet end 12C ... Outlet side diameter-reduction taper part 12D ... Outlet side inner peripheral groove part 12E ... Middle small inner diameter part 14 ... Stirrer 14A ... Through-hole 16 ... 1st member 16A ... Small inside diameter part 16B ... Large inside diameter part 16C ... Inlet side diameter expansion taper part 16D ... Small outside diameter part 16E ... Large outside diameter part 18 ... 2nd member 20 ... 3rd member 22 ... 4th member 22A ... Large inner diameter portion 22B ... Small inner diameter portion 22C ... Reduced diameter tapered portion 22D ... Large outer diameter portion 22E ... Small outer diameter portion 30, 50 ... Mixed liquid supply system for emulsion combustion 32 ... Combustion instrument 34 ... Mixed liquid storage tank 34A ... Bottom surface 36 ... first mixed liquid supply section 38 ... mixed liquid reflux section 38C, 44A, 46A ... discharge section 40 ... second mixed liquid supply section 42 ... liquid fuel storage tank 44 ... liquid fuel supply section 4 ... water supply unit

Claims (9)

  1. A tubular portion in which a mixed liquid formed by mixing liquid fuel and water flows in one direction from an inlet end which is one end portion to an outlet end which is the other end portion in a substantially cylindrical body;
    A plurality of penetrations arranged inside the tubular part so as to separate the inside of the tubular part into the inlet end side and the outlet end side, and communicate with the inlet end side and the outlet end side A stirrer having holes formed therein,
    The tubular portion has an outlet-side diameter-reduced taper portion that has an inner diameter that decreases from the inlet end side toward the outlet end side and is disposed closer to the outlet end than the stirrer, and the outlet side than diameter tapered portion have a, an outlet side inner periphery groove portion formed coaxially with the inner peripheral surface of the side of the outlet end,
    The agitator, the inlet end emulsion combustion mixer, characterized in that have a shape of substantially conical body side outer diameter and inner diameter increases toward the side on the side of the outlet end of the.
  2. In claim 1,
    The tubular portion has an inner diameter smaller than an inner diameter of an end portion on the inlet end side in the outlet side inner circumferential groove portion between the outlet side reduced diameter tapered portion and the outlet side inner circumferential groove portion. An intermediate small inner diameter portion adjacent to the taper portion, the inner diameter discontinuously increases from the inlet end side to the outlet end side at the boundary between the intermediate small inner diameter portion and the outlet side inner circumferential groove portion; An emulsion combustion mixer.
  3. In claim 1 or 2,
    At least a part of the inner peripheral side surface of the outlet-side inner peripheral groove has a tapered shape in which an inner diameter decreases from the inlet end side toward the outlet end side.
  4. In any one of Claims 1 thru | or 3,
    The tubular portion further has an inlet-side diameter-expanded taper portion that is arranged closer to the inlet end than the stirrer in a shape in which an inner diameter increases from the inlet end side toward the outlet end side. Emulsion combustion mixer.
  5. 5. The emulsion combustion mixer according to any one of claims 1 to 4 , a mixed liquid storage tank for storing the mixed liquid, and the mixed liquid supplied from the mixed liquid storage tank to the emulsion combustion mixer And a mixed liquid recirculation part for recirculating the mixed liquid mixed in the emulsion combustion mixer to the mixed liquid storage tank. Supply system.
  6. In claim 5 ,
    The mixed liquid reflux section includes a discharge section disposed in the mixed liquid storage tank so as to discharge the mixed liquid toward the bottom surface of the mixed liquid storage tank. Supply system.
  7. In claim 6 ,
    The discharge part of the mixed liquid reflux part is a pipe-like member whose tip is located in the vicinity of the bottom surface of the mixed liquid storage tank and is inclined with respect to a direction perpendicular to the bottom surface. A mixed liquid supply system for emulsion combustion.
  8. In any of claims 5 to 7 ,
    Emulsion combustion characterized by further comprising a second mixed liquid supply section for supplying the mixed liquid from the mixed liquid storage tank to a combustion appliance, with the mixed liquid supply section serving as a first mixed liquid supply section For mixed liquid supply system.
  9. In any of claims 5 to 7 ,
    The mixed liquid is directly supplied from the emulsion combustion mixer to the combustion appliance, and the mixed liquid recirculation unit supplies the mixed liquid mixed in the emulsion combustion mixer to the combustion appliance. A mixed liquid supply system for combustion of an emulsion, characterized in that it is configured to recirculate surplus mixed liquid that is not returned to the mixed liquid storage tank.
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JP2009099726A JP5102246B2 (en) 2009-04-16 2009-04-16 Emulsion combustion mixer and mixed liquid supply system for emulsion combustion
TW99111619A TWI391613B (en) 2009-04-16 2010-04-14 A mixture of emulsion combustion and a mixed liquid supply system for emulsion combustion

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JP2014198333A (en) * 2013-03-12 2014-10-23 哲雄 野村 Liquid atomization method and atomization and mixing device
SG11201607195TA (en) * 2014-06-24 2016-10-28 Toshiharu Fukai Device for supplying emulsified fuel and method for supplying said fuel

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* Cited by examiner, † Cited by third party
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DE3310049A1 (en) * 1983-03-19 1984-09-20 Bosch Gmbh Robert Fuel injection means for injecting a group consisting of at least two component fuel mixture
JPS6272134U (en) * 1985-10-24 1987-05-08
CN1063982C (en) * 1994-09-05 2001-04-04 株式会社爱知陶瓷工业所 The fluid treatment apparatus
JPH1142431A (en) * 1997-07-25 1999-02-16 Hakusui Chem Ind Ltd Atomizing method and device therefor
US7344570B2 (en) * 2001-08-24 2008-03-18 Clean Fuels Technology, Inc. Method for manufacturing an emulsified fuel
CN2665132Y (en) * 2003-09-23 2004-12-22 李利 Oil-water fuel synthesizing apparatus
US7500849B2 (en) * 2004-01-16 2009-03-10 Air Products And Chemicals, Inc. Emulsion atomizer nozzle, and burner, and method for oxy-fuel burner applications
JP4491526B2 (en) * 2004-07-13 2010-06-30 紘一 根石 The above apparatus combined with a simple waste oil reforming / fuelizing apparatus and combustion apparatus
TWM284447U (en) * 2005-08-25 2006-01-01 Huang Chau Tsung Gas-liquid mixing device

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TW201104177A (en) 2011-02-01
JP2010247080A (en) 2010-11-04

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