WO1999046035A1 - Agitateur permettant de produire une densite d'energie de cisaillement homogene et mazout en emulsion produit au moyen de celui-ci - Google Patents

Agitateur permettant de produire une densite d'energie de cisaillement homogene et mazout en emulsion produit au moyen de celui-ci Download PDF

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Publication number
WO1999046035A1
WO1999046035A1 PCT/JP1999/001186 JP9901186W WO9946035A1 WO 1999046035 A1 WO1999046035 A1 WO 1999046035A1 JP 9901186 W JP9901186 W JP 9901186W WO 9946035 A1 WO9946035 A1 WO 9946035A1
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WIPO (PCT)
Prior art keywords
water
emulsion
fuel oil
combustion
oil
Prior art date
Application number
PCT/JP1999/001186
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English (en)
Japanese (ja)
Inventor
Fumio Miyaguchi
Katsuya Kobayashi
Original Assignee
Cosmo All Ltd.
Hitachi Metals, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Cosmo All Ltd., Hitachi Metals, Ltd. filed Critical Cosmo All Ltd.
Publication of WO1999046035A1 publication Critical patent/WO1999046035A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/08—Preparation of fuel
    • F23K5/10—Mixing with other fluids
    • F23K5/12—Preparing emulsions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/41—Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/272—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces

Definitions

  • a rotor having a large-diameter main body, a stay having an inner wall arranged substantially concentrically with a predetermined gap between the rotor and the outer peripheral surface of the main body of the rotor, and an axial direction in the gap.
  • An inlet disposed upstream and an emulsion outlet disposed downstream to inject the object to be stirred
  • a shearing means formed of a convex or concave formed on at least one of the outer peripheral surface of the roaster and the inner wall of the stay and the inner wall of the stay.
  • Radius D1 from the rotation center of the mouth to the outer peripheral surface of the main unit, and the radial width of the gear! A uniform shear energy density stirrer characterized in that the ratio D 1: D 2 to 2 is set in the range of 10: 1 to 25: 1.
  • the above-mentioned shearing means when rotating the rotor to stir the object to be stirred introduced into the gap, suppresses the generation of secondary vortices and stirs uniformly while stirring.
  • the shape of the shearing means has a trapezoidal cross section with respect to the stirring direction of the object to be stirred, and at least a part of a corner of the trapezoidal shape is rounded.
  • a short-circuit preventing means is provided on at least a part of the outer peripheral surface of the rotor or at least a part of the inner wall of the stay to prevent the object to be stirred from short-circuiting and passing through the inside of the gap.
  • Emulsion fuel oil produced by using the uniform shear energy density stirrer according to any one of claims 1 to 5, wherein the object to be stirred is heavy oil of 80 to 70%.
  • the emulsified liquid was added in the range of 20% to 30% to make it 100%, and the mixture was stirred and stirred in the above gap to obtain emulsified water droplets composed of uniform particles having a desired particle size.
  • Emulsion fuel oil characterized in that:
  • the emulsified liquid is obtained by diluting an emulsified dispersant with a large amount of water, and promotes emulsified dispersion of water with respect to the heavy oil.
  • the emulsifying and dispersing agent has as a main component a dispersion of colloidal carbon fine particles having a particle size of 0.01 to 0.3 ⁇ m in water with a protective colloid and / or a dispersant,
  • the weight percentage of the carbon fine particles in the emulsifying dispersant is 0.3 to 0.001 weight%
  • the particle size of emulsified water droplets formed by stirring the above-mentioned emulsion and heavy oil with the above-mentioned uniform shear energy density stirrer is made of uniform particles of 20 to 30 m.
  • the present invention relates to a homogenous shear energy density stirrer and an emulsion fuel oil, and more particularly to harmful substances such as nitrogen oxides generated during combustion by mixing with low-cost high-calorie heavy oil such as C heavy oil.
  • Emulsified water droplets with ideal particle size can be obtained by mixing and stirring an emulsified liquid that can exhibit excellent effects such as pollution reduction measures such as substance reduction and dust reduction, and energy saving by improving combustion efficiency with heavy oil.
  • TECHNICAL FIELD The present invention relates to a uniform shear energy density stirrer capable of efficiently producing a water-in-oil type emulsion fuel oil provided with an emulsified fuel oil, and an emulsion fuel oil produced using the same.
  • Emulsion combustion is a method in which water is mixed with fuel oil to emulsify and burn, and not only reduces NOx by lowering and equalizing the flame temperature, but also reduces the amount of soot by complete combustion of residual carbon. This enabled complete combustion with a smaller amount of air, which was an effective combustion method to achieve energy savings and low pollution.
  • the emulsion combustion method which has been known to have excellent effects as described above, has a difficult problem at a practical level, particularly, a method for efficiently producing an emulsion fuel oil.
  • Emulsion combustion methods having such excellent effects as described above have not been generally used.
  • conventional techniques for producing emulsion fuel include a method of directly mixing water and fuel using a line mixer, a method of adding a surfactant as a mixing emulsifier of water and fuel, and mixing.
  • a surfactant as a mixing emulsifier of water and fuel
  • the diameter of the emulsion droplets should be about 20 to 30 m and should be as uniform as possible.
  • Patent No. 1 287 364 Japanese Patent Publication No. 60-110766
  • Fuel oils such as heavy oil are prepared using an emulsifying dispersant whose main component is colloidal carbon fine particles with a particle size of 0.01 to 0.3 / m dispersed in protective colloid and / or dispersant.
  • Water-in-oil (W / 0) emulsion Technology for fuel oil is disclosed.
  • W water-in-oil type obtained by mixing this emulsifying agent at a dilution of about 250 times with water with a fuel oil such as heavy fuel oil 20 to 30% is mixed.
  • this emulsifying dispersant can impart robust and lipophilic properties to water particles, it satisfies the above conditions to some extent, but has a uniform particle size in fuel oil such as heavy oil. Because there was no agitator to create water particles, it had not yet been possible to create emulsion fuel oil with even higher combustion efficiency.
  • FIG. 10 is a longitudinal section showing a state where a conventional stirrer is cut in half in the vertical direction. As shown in Fig. 10, the conventional stirrer has a cylindrical stay.
  • the mouth 101 was rotatably supported in the evening 100, and the blade 102 was provided around the low evening 101.
  • the fuel oil and the emulsifier to be mixed and stirred are injected from above the stay 100, and when the mouth 101 is rotated in the direction of the arrow by a drive mechanism (not shown), the blade 1 Since 0 2 rotates in the flow path 103 between the inner wall of the stay 100 and the mouth 101, the fuel oil and the emulsifier passing there are mixed and stirred, and It became John fuel oil and was discharged from the lower outlet.
  • FIG. 11 is a diagram showing the particle size distribution of a water-in-oil (W / 0) emulsion fuel oil produced using a conventional emulsifying dispersant and a stirrer.
  • the dispersed water particles have a wide particle size distribution of 3 to 100 im.
  • the blade 102 as shown in FIG. 10 is used as the stirring means, and the limit of the stirring ability of the conventional stirrer is as described above. This has been a major factor in preventing the mixing of the emulsion using the emulsifying agent and the combustion oil in an ideal state (uniform particle size distribution).
  • Japanese Patent Publication No. Sho 63-39995 discloses an apparatus for mixing a pulp suspension with a treatment medium or the like for bleaching.
  • an annular stator is arranged opposite to the outer peripheral surface of the rotor with a circular gap therebetween, and the pulp suspension and the processing medium are placed in the gap from one axial end of the circular gap.
  • the pulp fibers are exposed and mixed by the shear force field and the turbulent flow generated by the turbulent flow forming members such as pins protruding from the rotating rotor and stator inner peripheral surfaces Was.
  • a thin layer high-speed shearing type such as rotating a counter-layer disk at about 100 rpm or rotating a counter cylinder such as a syringe with a motor drive is used.
  • a counter cylinder such as a syringe with a motor drive
  • particles having a particle size of about 10 to 30 Aim could be produced.
  • the axial length of the gear between the rotor and the stator is too short with respect to the axial length of the rotor, and the rotor and the stator are
  • the liquid with the higher specific gravity will be excessively displaced downward due to gravity, and will be evenly distributed throughout the gap. High shear energy There was a problem that it became difficult.
  • the above-described production apparatus of the high-speed shearing type can satisfy the particle size and uniformity of the emulsion-colloid produced, but since the amount produced is extremely small, the production of boilers and gas turbines is difficult. Thus, it was not suitable for producing large quantities of emulsion fuel oil used in large-scale combustion systems.
  • the present invention has been made in view of the above, and a fuel oil such as heavy oil and an emulsified liquid are mixed and stirred with a uniform shearing energy density, and emulsified water droplets having a uniform and desired particle size are mixed in the fuel oil.
  • Emulsion fuel oil with good controllability and dispersion can be produced in large quantities, and effective measures against pollution can be taken by reducing harmful substances such as nitrogen oxides and soot and dust generated during combustion, and improve combustion efficiency. It is an object of the present invention to provide a uniform shear energy one-density stirrer capable of exerting an energy-saving effect.
  • a water-in-oil type emulsion fuel oil having an ideal particle diameter and stable emulsified water droplets is obtained. It is intended to provide an emulsion fuel oil that can obtain harmful substances generated during combustion, reduce the harmful substances generated during combustion, and exhibit an energy-saving effect due to high combustion efficiency.
  • the invention according to claim 1 is characterized in that a predetermined gap is provided between a rotor having a large-diameter main body and an outer peripheral surface of the main body of the rotor.
  • a stage having an inner wall arranged substantially concentrically, an introduction part arranged upstream and an emulsion discharge part arranged downstream to inject the object to be stirred into the gap in the axial direction.
  • a shearing means consisting of a convex or concave formed on at least one of the outer peripheral surface of the rotor and the inner wall of the stay, and a shear introduced into the gap by rotating the mouth.
  • a stirrer for stirring an object to be stirred with uniform shearing energy wherein a ratio D 1: D 2 between a radius D 1 from the rotation center of the rotor to the outer peripheral surface of the main body and a radial width D 2 of the gap is set. , 10: 1 to 25: 1
  • the main body of the rotor is enlarged in diameter
  • the inner wall of the stay is provided at a predetermined gap between the rotor and the outer peripheral surface of the rotor, and the inner wall of the rotor from the rotation center of the mouth to the outer peripheral surface of the main body is provided.
  • radius! Since D 1: D 2, which is the ratio of 1 to the radial width D 2 of the gap, is set to be in the range of 10: 1 to 25: 1, there is almost no difference between the inside and outside of the stirring diameter.
  • At least one of the convex and concave shearing means is provided on the outer peripheral surface of the roaster or on the inner wall of the stay to provide a uniform shear energy by rotating the evening and introducing the stirring object introduced into the gap.
  • the invention according to claim 2 is the uniform shear energy density stirrer according to claim 1, wherein the shearing means rotates the rotor to stir the stirring target introduced into the gear. It is formed in a shape that can be stirred while being uniformly sheared while suppressing the generation of secondary vortices. According to this, the stirring object introduced into the gap by rotating the roaster 8
  • the shearing means for agitating the object has a shape that minimizes the generation of secondary vortices in the object to be agitated during agitation and enables uniform agitation with shearing. Non-uniform stirring conditions due to the generation of high-order vortices are eliminated, and the shear energy density can be made uniform.Emulsion fuel oil or the like in which an emulsifier having a uniform particle size is dispersed can be easily and in large quantities. Can be generated.
  • the invention according to claim 3 is the uniform shear energy density stirrer according to claim 2, wherein the shape of the shearing means is a trapezoidal cross section with respect to a stirring direction of the object to be stirred, and the corner of the trapezoidal shape. At least a part of it is rounded.
  • the shape of the shearing means is not a blade shape but a trapezoidal cross section in the stirring direction, thereby suppressing the generation of secondary higher-order vortices, and at the same time, reducing the trapezoidal corner. Since at least a part of the part is rounded, it is possible to suppress the generation of higher-order vortices that may also occur at the corner part, and it is possible to stir with a more uniform shear energy density.
  • the invention according to claim 4 is the uniform shear energy density stirrer according to claim 1, wherein the stirring object is located in at least one portion of the outer peripheral surface of the rotor or at least a part of the inner wall of the stay. And a short-circuit preventing means for short-circuiting and preventing passage.
  • the provision of the short-circuit preventing means prevents the object to be stirred from being injected into the gap and short-circuiting through the gap before being sufficiently stirred, so that the object to be stirred becomes uneven. It can prevent agitation due to shear energy density.
  • the invention according to claim 5 is the uniform shear energy density stirrer according to any one of claims 1 to 4, wherein the ratio of D 1 to D 2, 9
  • the rotational speed of the oil and the size and shape of the shearing means are appropriately adjusted so as to generate emulsified water droplets composed of uniform particles having a desired particle diameter.
  • the shear energy density during stirring can be controlled by adjusting the ratio of 0 1 and 0 2, the rotation speed of the rotor, the size and shape of the shearing means, etc. It is possible to generate emulsified water droplets composed of uniform particles.
  • the invention according to claim 6 is an emulsion fuel oil produced using the uniform shear energy density stirrer according to any one of claims 1 to 5, wherein the object to be stirred is heavy oil 80 to Emulsions are added to the mixture at a concentration of 100% by adding the emulsion in the range of 20 to 30% with respect to 70%, and uniform particles having a desired particle size are obtained by stirring in the above gap.
  • the emulsified water droplets consist of
  • an object to be agitated to 100% by adding an emulsified liquid in a range of 20% to 30% with respect to 80% to 70% of heavy oil is injected into a uniform shearing energy density stirrer.
  • emulsified water droplets composed of uniform particles having a desired particle size can be obtained.
  • the invention according to claim 7 is the emulsion fuel oil according to claim 6, wherein the emulsified liquid is obtained by diluting an emulsifying dispersant with a large amount of water, and emulsifying and dispersing water in the heavy oil.
  • the emulsifying and dispersing agent is obtained by dispersing black ink in water using a protective colloid II dispersing agent.
  • an emulsified dispersant obtained by dispersing ink with water using a protective colloid dispersant and diluted with a large amount of water was used as an emulsified liquid, so that emulsified dispersion of water in heavy oil was promoted.
  • the invention described in claim 8 relates to the emulsion fuel oil described in claim 7.
  • the emulsifying and dispersing agent has as its main component a dispersion of colloidal carbon fine particles having a particle size of 0.01 to 0.3 m in water with a protective colloid and / or a dispersing agent.
  • the weight% of the carbon fine particles in the emulsifying dispersant is from 0.3 to 0.001% by weight, and emulsified water droplets formed by stirring the above-mentioned emulsion and heavy oil with the above-mentioned uniform shearing energy single-density stirrer. Is made of uniform particles having a particle size of 20 to 30 m.
  • an emulsifying dispersant containing, as a main component, colloidal carbon fine particles having a particle size of 0.01 to 0.3 ⁇ 111 in water dispersed with a protective colloid and / or a dispersant is used.
  • the carbon fine particles in the emulsifying dispersant were used in an amount of 0.3 to 0.01% by weight, and the emulsion containing the emulsifying dispersant and heavy oil were stirred by the uniform shear energy density stirrer. It is possible to obtain a stable emulsion fuel oil composed of uniform particles having a particle size of the emulsion water droplets of 20 to 30 zm.
  • FIG. 1 (a) is a longitudinal sectional view showing a configuration of a uniform shear energy density stirrer according to Embodiment 1 of the present invention
  • FIG. 1 (b) is an XX sectional view of (a).
  • Fig. 2 is an enlarged view of the shearing blade part of Fig. 1 (a).
  • Fig. 3 shows examples of the shape of the tip surface of the shearing blade shown in Fig. 2, (a) a diagram with a flat tip, (b) a diagram with a concave tip, (b) c) is a diagram when the tip is a curved convex part.
  • FIG. 4 is a view of the short-circuit prevention plate provided on the outer peripheral surface of the rotary drum when viewed from the rotation axis direction.
  • FIG. 5 is a diagram showing the particle size distribution of emulsion water droplets generated using the uniform shear energy density stirrer of the first embodiment.
  • Figure 6 shows the results when fuel oil C is directly burned and when water is used as the emulsion fuel. 11
  • FIG. 3 is a diagram comparing calorific values, endothermic amounts, and exhaust heat amounts in the case of anaerobic gasification combustion.
  • Fig. 7 is a diagram comparing the combustion results between the case where fuel oil C was converted to emulsion fuel and burned, and the case where it was burned as it was.
  • FIG. 8 is a diagram comparing the emulsion fuel oil produced when the uniform shear energy density stirrer of Embodiment 1 is used and the case where the conventional stirrer is used.
  • FIG. 9 is a cross-sectional view showing a configuration of a uniform shear energy density stirrer according to the second embodiment.
  • FIG. 10 is a longitudinal section showing a state where the conventional stirrer is cut in half in the vertical direction.
  • FIG. 11 is a diagram showing the particle size distribution of a water-in-oil emulsion fuel oil produced using a conventional emulsifying dispersant and a stirrer.
  • FIG. 1 (a) is a longitudinal sectional view showing a configuration of a uniform shearing energy density stirrer according to Embodiment 1 of the present invention
  • (b) is a sectional view taken along line XX of FIG. 1 (a). is there.
  • the stirrer shown in FIG. 1 is disposed inside a fixed drum (stator) 1 and is rotatably supported on a rotating shaft 2 as a center.
  • a mixing channel 4 formed of a narrow gap formed between the drum 3 and the mixing channel 4, and an object to be stirred in the mixing channel 4 located upstream of the mixing channel 4 (here, heavy oil C and an emulsion).
  • An inlet 5 for injecting water and an emulsion discharge 6 disposed downstream of the mixing channel 4 are provided. 12
  • the introduction unit 5 includes a fuel oil introduction pipe 11 for introducing a fuel oil, for example, C heavy oil 10, and an emulsion introduction pipe 13 for introducing the emulsion 12.
  • a fuel oil supply tank (not shown) is connected to the upstream side of the fuel oil introduction pipe 11.
  • the inlet pipes 11 and 13 are tapered and flared. Is an example, and is not necessarily intended to limit the configuration to such a flow path and its upstream and downstream sides.
  • the path between the emulsion discharging section 6 and the mixing flow path 4 has a tapered shape expanding upward.
  • this is merely an example, and the present invention is not limited to this example.
  • the stirring capacity (shear energy) Paying attention to the fact that the density of the rotating drum 3 is no longer the same, placing the large-diameter rotating drum 3 in the center of rotation (inner diameter) inside the hollow of the fixed drum allows stirring in the space occupied by the rotating drum 3.
  • the mixing channel 4 consisting of the outer diameter portion of the hollow inside the fixed drum 3, that is, the gap between the outer peripheral surface of the rotating drum 3 and the inner peripheral surface of the fixed drum 2, It is designed to mix and stir the fuel oil and the emulsion.
  • a plurality of shearing blades 20 are arranged at fixed intervals in the axial direction on the inner wall of the fixed drum 1 constituting the mixing channel 4, while the outer circumferential surface of the rotating drum 3 is arranged.
  • a plurality of shearing blades 21 are fixed at positions where the shearing blades 20 on the fixed drum 1 side do not interfere with each other in the axial direction. In this way, the length of each of the shearing blades 20 and 21 arranged so as not to interfere with each other in the axial direction is selected such that they protrude toward each other in the radial direction. 13
  • the liquid moving in the axial direction in the mixing flow path 4 is forcibly passed through the zigzag flow path, and since the shear blade 21 on the movable side is rotating, the two types of liquid are uniform. It is possible to obtain an emulsion fuel oil containing uniform emulsified water droplets having a desired particle size by being surely stirred by a high shear energy density.
  • Fig. 2 is an enlarged view of the shear blades 20 and 21 in Fig. 1 (a).
  • the shape of the shearing blades 20 and 21 may be trapezoidal blades as shown in Fig. 2, or if necessary, one or both shearing blades may have a rounded corner (part of the corner).
  • the shape 22 may be formed.
  • the shape of the shearing blades 20 and 21 is trapezoidal blade-like, and the corners (corners) of the shearing blades are rounded because the heavy fuel oil and the emulsion are stirred by the shearing blades. This is to prevent non-uniform shear energy density due to the generation of higher-order vortices near the tip.
  • conditions suitable for obtaining an emulsion water droplet having a desired particle size are set.
  • FIGS. 3A and 3B show examples of the shape of the tip surface of the shearing blade shown in FIG. 2, respectively, where FIG. 3A is a diagram when the tip is flat, FIG. 3B is a diagram when the tip is curved concave portion, (c) is a diagram in the case where the tip is a curved convex part.
  • each shearing blade 20 and 21 may be flat, curved concave, curved convex, or these surfaces. May be combined.
  • Liquids can also be generated.
  • at least one of the inner wall surface of the fixed drum 1 and the outer peripheral surface of the rotating drum 3 is provided at an appropriate position on the entire circumference of the fixed drum or the rotating drum, or almost all except a part thereof. If the short-circuit prevention plate 25 as a short-circuit prevention means extending continuously is provided in a protruding manner, it is possible to eliminate the liquid that passes without being mixed and stirred.
  • FIG. 4 is a view of the short-circuit prevention plate 25 provided on the outer peripheral surface of the rotary drum 3 as viewed from the rotation axis direction. As shown in FIG. 4, a plurality of through holes 26 may or may not be provided on the plate surface of the short-circuit prevention plate 25 at regular intervals along the circumferential direction.
  • the short-circuit prevention plate 25 extended in the circumferential direction is formed by the shear blades 20 on the fixed drum 1 side and the shear blades 21 on the rotary drum 3 side shown in FIG. Of the liquid passing through the portion where none of the shearing blades 20 and 21 exist (actually changes constantly because the shearing blade 21 is rotating). Of these, even if a liquid that is not sufficiently stirred and mixed is generated by the cooperation of both shearing blades, the liquid can be forcibly guided to the shearing blade side by the short-circuit prevention plate 25, so the uniform shear energy density Stirring and mixing without omission can be realized.
  • a temperature control means is provided on the fixed drum 1 side, for example, an electric heating heater or a steam heater.
  • a jacket 30 for flowing a heating medium such as the above may be arranged.
  • the axial length of the mixing channel 4 is equal to or larger than the diameter of the rotary drum 3. Or, by adopting a tilted posture other than that, it is possible to secure sufficient uniform shearing energy even if the entire device is placed in a horizontal posture or a tilted posture. This means that the stirrer Fifteen
  • the radius of the rotating drum 3 is 50 to 100 cm and the width (radial width) of the mixing channel 4 is about 5 cm.
  • the radius from the rotation center of the rotary drum 3 to the outer peripheral surface is D1
  • the radial width of the mixing channel 4 is D2.
  • the ratio D1: D2 was set in the range of 10: 1 to 25: 1.
  • the ratio of D1 to D2 can vary depending on various conditions such as the shape and arrangement of the shearing blade, and forms an emulsion droplet having a desired particle size (for example, 20 to 30 m).
  • FIG. 5 is a diagram showing a particle size distribution state of the emulsion water droplets generated using the uniform shear energy density stirrer of the first embodiment. As shown in Fig. 5, it can be seen that an emulsion fuel containing water droplets having a uniform particle diameter of 20 to 30 m suitable for the combustion conditions was generated.
  • the emulsifying dispersant used for the emulsified liquid in the first embodiment is disclosed in Japanese Patent No. 12877364 “Method for producing milky fuel oil” (Japanese Patent Publication No. 60-110176). The same emulsifying dispersant is used, and the emulsifying dispersant will be described below.
  • water is a concept that includes tap water, industrial water, other well water, rivers, lakes and marshes, and seawater.
  • Ink juice is produced by dispersing carbon fine particles, such as oily smoke, pine smoke, soot, and carbon black, in water by using glue, gelatin, other dispersants, protective colloids, etc. as appropriate. ing.
  • carbon fine particles such as oily smoke, pine smoke, soot, and carbon black
  • glue for example, Kuretake, Kaimei
  • black ink obtained by combining oil made of oil smoke, pine smoke, soot, etc. with glue and water is used. Is also included.
  • oil smoke, pine smoke, soot, carbon black, etc. dispersed in water using glue, gelatin, other dispersants, protective colloids, etc. as appropriate, are dispersed with a pole mill or roll, and ground. Or those obtained by diluting these with water.
  • water component means, for example, when commercially available Kuretake ink is used as the ink, 0.3 to 0.001% by weight of water (typically 0.3%). (1 to 0.01% by weight). This ratio can be variously changed depending on the quality of heavy oil, the water content of dairy fuel oil, the storage period, and the like. Preferred examples include those obtained by adding 100 milliliters of water to 50 milliliters of black ink as a water component.
  • dispersing ink in water When dispersing ink in water, add “dispersant” and “protective colloid” as necessary.
  • the “dispersant” include a sulfonate of a naphthalene-formalin condensate, a sulfonate of an aromatic polycyclic condensate, a triazine-based dispersant, and a ligulin-based dispersant.
  • the “protected colloid” include, for example, glue, gelatin, albumin, alkali salts of casein, carboxymethylcellulose, methylcellulose, hydroxyshethylcellulose, polyvinyl alcohol, and polyvinylpyrrole. 17
  • Nidon polyacrylate, polyacrylamide and the like can be used.
  • a heavy oil, B heavy oil, C heavy oil, and a mixed heavy oil in which these are appropriately mixed can be used. Further, those obtained by mixing a small amount of other fuel oils with these heavy oils can also be used.
  • the above-mentioned “water component” corresponds to the emulsion in the present invention.
  • the uniform shear energy density stirrer configured as shown in FIGS. It is possible to easily and in large quantities obtain a stable emulsion fuel oil containing uniform emulsion water droplets having a particle size of the same.
  • this emulsion fuel oil is burned, it is possible to achieve a high energy use efficiency that has not been obtained in the past, as well as nitrogen oxides and soot and dust that have been conventionally generated during heavy oil combustion. Clean exhaust gas with greatly reduced harmful substances such as harmful substances can be obtained.
  • Free radical reaction occurs.
  • molecules of water H 2 0
  • water vapor in a high-temperature atmosphere (1)
  • an emulsion containing carbon fine particles having a particle size of 0.01 to 0.3 m in a range of 20 to 30% in heavy oil is added. Obtained by stirring in the gap of the stirrer 19
  • This water gasification reaction is an endothermic reaction, but if the atmosphere is at a high temperature and the supply of reaction heat is sufficient, the free radical reaction will proceed, causing an explosive reaction, and gas combustion (the generated CO gas and H 2 Gas and burning) will proceed at the same time.
  • Fig. 6 compares the calorific value, endothermic amount, and exhaust heat amount when fuel oil C is directly burned and when water gasification combustion is performed as the emulsion fuel.
  • Fig. 6 in the conventional example where heavy fuel oil was burned as it was (left column), 13 wt% of heavy fuel oil remained as residual carbon content, but water gasification combustion was performed as emulsion fuel.
  • the conventional combustion flame has a large radiation loss because the residual carbon content glows red and looks red.However, in the case of good water gasification combustion as in the present invention, the radiation loss is close to complete combustion and the radiation loss is small. The combustion efficiency can be further improved.
  • water (H 2 0) free atom for use as a free radical scavenger
  • the water Ru is to put into Emarujon state with respect to the fuel, water is decomposed
  • free radicals such as 0 ⁇ (radical), 0 3 , 0H ⁇ , H ⁇ are generated, and this reacts with the carbon-based free radicals of C ', CO', CH ⁇ , CH 3, and CO, H make molecules of clean-burning type 2, etc., it will return to C0 2 and H 2 0 in a diffusion flame.
  • the five basic free radical reactions in this case are as follows.
  • Fig. 7 shows the case where heavy fuel oil C is converted to emulsion fuel and burned, and the fuel is burned as it is.
  • Fig. 8 is a diagram comparing the combustion results with twenty two
  • FIG. 3 is a diagram comparing emulsion fuel oils produced when a uniform shear energy density stirrer of Embodiment 1 is used and when a conventional stirrer is used.
  • the fuel and the emulsified liquid are stirred by the stirrer having uniform shear energy and one density, as shown in FIG. It is possible to efficiently produce an emulsion fuel oil in which water droplets having a desired particle diameter (10 to 30 zm) are dispersed uniformly in 30 sec).
  • the residence time is 60 to 80 times (20 to 30 min), which is long. (3-: L 00 ⁇ . ⁇ ) ⁇
  • high-quality emulsion fuel oil can be produced efficiently and in large quantities.
  • the power efficiency for rotating the rotary drum of the stirrer (see FIG. 1) of the first embodiment is larger than that of the conventional example (see FIG. 10) because the main body has a larger diameter, and the inside of the narrow gap is smaller. Since it is only necessary to stir the passing fuel and the emulsion, it is possible to stir with less power, and power efficiency can be improved.
  • the air ratio is smaller than that of the conventional example and almost complete combustion, as shown in Fig. 7. Since water gasification combustion is used, a large amount of heat can be obtained. Furthermore, the reduction of the amount of residual carbon and harmful exhaust gas, etc., can prevent adverse effects on the environment, and can reduce the radiation loss and increase the combustion efficiency.
  • FIG. 9 is a cross-sectional view showing a configuration of a uniform shear energy density stirrer according to the second embodiment.
  • the same parts as those in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted. twenty three
  • the rotary drum 3 has a cylindrical shape
  • the cavity of the fixed drum 1 has a cylindrical shape corresponding to the cylindrical shape. The components that are different.
  • the mixing flow path 4 is limited to a narrow gap in the outer peripheral portion of the internal space of the fixed drum 1 (also in this case, the radius from the rotation center of the rotary drum to the outer peripheral surface is reduced) D 1, and the ratio D 1: D 2 to the radial width D 2 of the mixing channel 4 is in the range of 10: 1 to 25: 1), and the shearing blade is the same as that of the first embodiment. Because of the same arrangement, a uniform shear energy density similar to that of the first embodiment is ensured, so that a water-in-oil type emulsion fuel oil having uniform emulsion water droplets having a desired particle size is produced. Can be.
  • the fuel and the emulsion are stirred by the stirrer having uniform shear energy and density, water droplets having a uniform and desired particle size are dispersed with a short residence time.
  • the resulting emulsion fuel oil can be efficiently produced.
  • the emulsion fuel oil of the present invention was used as a fuel for a boiler using a burner.
  • the present invention is not limited to this example.
  • the emulsion fuel oil produced using the uniform shear energy density stirrer of the present invention performs efficient water gasification combustion and also increases the volume of exhaust gas due to the evaporation of the contained water. If evaluated as (exhaust gas volume / input fuel volume), it can be a factor to improve work efficiency.
  • Emulsions that are effective in reducing pollution, such as nitrogen oxides generated during combustion, and in reducing pollution, such as the amount of soot and dust, can also be used to improve energy efficiency by improving combustion efficiency.
  • reducing pollution such as nitrogen oxides generated during combustion
  • reducing pollution such as the amount of soot and dust
  • a water-in-oil type emulsion fuel oil having an ideal particle size and having stable emulsified water droplets can be produced.
  • the object to be stirred introduced into the gear can be stirred with uniform shearing energy while rotating the rotor, so if heavy oil and emulsifier are injected and mixed, uniform particle size in heavy oil It is possible to disperse emulsified water droplets having a distribution, reduce nitrogen oxides and harmful substances such as soot and dust generated during combustion, and improve combustion efficiency to achieve energy saving effects. it can.
  • the non-uniform stirring conditions due to the generation of secondary higher-order vortices are eliminated, and the shear energy density can be made uniform.
  • Emulsion fuel oil and the like in which an emulsifier and the like are dispersed can be easily produced in large quantities.
  • the third aspect of the invention it is possible to suppress the generation of high-order vortices that may be generated at a part of the corner of the trapezoidal shearing means, and to stir with a more uniform shearing energy density. can do.
  • the short-circuit preventing means can prevent agitation due to uneven shear energy density.
  • emulsification and dispersion of water with respect to heavy oil are promoted, and a water-in-oil emulsion fuel oil having an idealized particle size and stable emulsified water droplets can be obtained. it can.
  • the eighth aspect of the present invention it is possible to obtain a stable emulsion fuel oil composed of uniform particles having a particle size of emulsified water droplets of 20 to 30 m.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

L'invention concerne une émulsion efficace pour la lutte contre la pollution de l'environnement, en ce qu'elle permet de réduire la quantité de matières dangereuses et de poussière générées pendant la combustion. Ladite émulsion peut également permettre d'économiser l'énergie grâce à une efficacité de combustion accrue et peut être mélangée à du pétrole lourd, de sorte qu'un mazout en émulsion du type huileuse, constitué de particules émulsionnées stables, ayant des tailles données, soit produit.
PCT/JP1999/001186 1998-03-12 1999-03-11 Agitateur permettant de produire une densite d'energie de cisaillement homogene et mazout en emulsion produit au moyen de celui-ci WO1999046035A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/80466 1998-03-12
JP8046698 1998-03-12

Publications (1)

Publication Number Publication Date
WO1999046035A1 true WO1999046035A1 (fr) 1999-09-16

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PCT/JP1999/001186 WO1999046035A1 (fr) 1998-03-12 1999-03-11 Agitateur permettant de produire une densite d'energie de cisaillement homogene et mazout en emulsion produit au moyen de celui-ci

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007152214A (ja) * 2005-12-02 2007-06-21 Mooreekusu:Kk 乳化物製造装置及び製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5372016A (en) * 1976-12-08 1978-06-27 Toyo Tire & Rubber Co Ltd Apparatus for preparation and supply of heavy oil w/o emulsion fuel
JPS59149992A (ja) * 1983-02-17 1984-08-28 Yoshinari Shimada 乳状燃料油の製造方法
JPH0394931U (fr) * 1990-01-08 1991-09-27
JPH0549912A (ja) * 1991-08-21 1993-03-02 Kanzaki Paper Mfg Co Ltd マイクロカプセルの製造方法
JPH08108059A (ja) * 1994-10-13 1996-04-30 Sekisui Chem Co Ltd 液状物質の混合装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5372016A (en) * 1976-12-08 1978-06-27 Toyo Tire & Rubber Co Ltd Apparatus for preparation and supply of heavy oil w/o emulsion fuel
JPS59149992A (ja) * 1983-02-17 1984-08-28 Yoshinari Shimada 乳状燃料油の製造方法
JPH0394931U (fr) * 1990-01-08 1991-09-27
JPH0549912A (ja) * 1991-08-21 1993-03-02 Kanzaki Paper Mfg Co Ltd マイクロカプセルの製造方法
JPH08108059A (ja) * 1994-10-13 1996-04-30 Sekisui Chem Co Ltd 液状物質の混合装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007152214A (ja) * 2005-12-02 2007-06-21 Mooreekusu:Kk 乳化物製造装置及び製造方法

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