KR20060106331A - Environmentally friendly micro-encapsulated clean fuel in form of water-in-oil, method and system for preparing the same - Google Patents

Abstract

The microencapsulated fuel composed of water particles of the present invention, an inorganic additive layer formed on the outer side of the water particles, and a hydrophobic fuel oil layer formed on the outer side of the inorganic additive layer is introduced into a combustion chamber of the boiler without being separated from oil and water even at a high temperature. By blasting water particles, the outer fuel oil is made into fine particles, which makes it possible to completely burn it, thereby saving energy and reducing air pollutants.Heavy fuel oils such as waste lubrication oil, ship waste oil, bunker C oil and bunker B oil As a result, it is possible to fully burn the waste oil and use it as a fuel, and to reduce the environmental pollution problem.

Microencapsulated fuel, inorganic additives, explosion of water particles, atomization of fuel

Description

Environmentally friendly micro-encapsulated clean fuel in form of water-in-oil, method and system for preparing the same

1A is a view schematically showing a form of a conventional emulsion fuel oil;

1B is a view schematically showing a phenomenon in which a conventional oil emulsion fuel oil is separated from water by heating;

Figure 2a is a diagram schematically showing the structure of the microencapsulated softening of the present invention;

Figure 2b is an enlarged micrograph of the microencapsulated fuel prepared in Example 1 of the present invention;

FIG. 2C is a view schematically showing a phenomenon in which the microencapsulated fuel of the present invention is atomized by the explosion of water in a combustion chamber; FIG.

3 is a process diagram showing a continuous production system of the micro-sulfated fuel of the present invention;

3 is an enlarged cross-sectional view of the mixing unit of FIG. 3.

<Description of Symbols for Major Parts of Drawings>

1, 1 ', 13, 13': fuel oil

2, 2 ', 12, 12': emulsifier or mineral additive

3, 3 ', 11, 11': water

20: fuel oil storage tank 30: hot water storage tank

40: inorganic additive storage tank 50: mixing unit

51: fuel oil inlet 52: hot water inlet

53: mineral additive inlet 54: line mixer

60: microencapsulated fuel storage tank

The present invention relates to an environment-friendly clean water-in-oil type microencapsulated fuel prepared from various liquid oils including heavy oil, waste liquid oil, and the like, a manufacturing method and a manufacturing system thereof. More specifically, it is an environmentally friendly clean water-in-oil type microencapsulated fuel produced from heavy oil such as bunker C oil, bunker B oil, waste lubricating oil, ship waste oil, etc. and maintaining an emulsion state even at high temperature, and a manufacturing system and manufacturing method thereof. will be.

When burning heavy oils such as bunker C oil and bunker B oil, waste lubricating oil and ship waste oil, it is possible to release air pollutants such as nitrogen oxides (NOx), sulfur oxides (SOx), carbon dioxide, dust and smoke. The development of combustion techniques to reduce has been going on for a long time.

In order to effectively burn highly viscous heavy oil, the fuel must be heated to lower its viscosity before being injected into the burner so as to be sprayed in the form of fine particles. What needs to be accelerated is indispensable.

However, despite the research so far, this problem has not been solved, and the development of burner technology and combustion gas treatment technology is still ongoing.

On the other hand, since the user's cost, installation space, maintenance cost of the facility, etc. were a big burden, an efficient combustion technique by a simple method is required.

One of the combustion technologies developed to solve the above problems is a water-in-oil emulsified fuel in which water is mixed with oil.

The water-in-oil emulsified fuel is fuel oil such as heavy oil when the injection of high temperature in the combustion chamber by the difference in boiling point, such as heavy oil of about 300 ℃ or more and water boiling point of 100 ℃ by the explosive force of the water particles to fine-grained combustion of the emulsified fuel oil To increase combustion efficiency. In addition, as the combustion efficiency of the emulsified fuel oil increases, the amount of air pollutant emissions can be reduced.

Methods for producing such emulsified fuel oil is a method of simply mechanically mixing the fuel oil and water and a method of mixing water and fuel oil using a chemical additive, that is, an emulsifier. The first of the above methods is incomplete in terms of stability of the emulsified fuel is rarely used.

Conventional methods for producing emulsified fuels using emulsifiers have the following problems and do not achieve a marked improvement in combustion efficiency.

That is, when the emulsified fuel oil as shown in Figure 1a is heated to about 50 to 60 ℃ or more in order to lower the viscosity of the high viscosity fuel oil such as heavy oil before entering the combustion chamber, as shown in Figure 1b, the emulsion collapses and water Agglomeration between particles and oil particles occurs, causing oil and water to separate. Therefore, it becomes impossible to achieve the purpose of exploding water to atomize fuel oil.

Due to this separation of water-fuel oil, the combustion state is not so improved.

Then, the inside of the combustion chamber is oxidized by the liquid water, and a large amount of impurities are deposited, so that maintenance of the fuel pipe and the burner is problematic.

In addition, there is a problem that a new air pollutant is generated by the female of the emulsifier which is an organic surfactant in addition to the combustion gas of the fuel oil.

It is an object of the present invention to solve the above problems in the conventional emulsion fuel oil production.

It is a first object of the present invention to provide an environment-friendly clean water-in-oil type microencapsulated fuel that does not cause water separation even when heated.

A second object of the present invention is to provide a method for producing a microencapsulated fuel according to the first object.

It is a third object of the present invention to provide a system for producing microencapsulated fuel according to the first object.

Environment-friendly clean water-in-oil type microencapsulated fuel according to the first object of the present invention is composed of water particles (water drop), an inorganic additive layer formed on the outside of the water particles, and a hydrophobic fuel oil layer formed on the outside of the inorganic additive layer. will be. The structure of the microencapsulated fuel 10 is schematically shown in FIG. 1. That is, the water droplet 11 is formed inside, the inorganic layer 12 is formed in the outer part, and the fuel layer 13 is formed in the outermost part.

In addition, the above structure can be confirmed through FIG. 2, which shows an enlarged photomicrograph of the microencapsulated fuel prepared by the present invention.

The fuel oil may be, but is not limited to, bunker C oil, bunker B oil, waste lubricant oil, ship waste oil, or a mixture thereof.

The size of the fuel microcapsules may be adjusted according to the operating conditions of the emulsifier, and the thickness or relative amount of the three layers constituting the fuel microcapsules may be adjusted according to the mixing ratio of water, inorganic and oil. have.

The microencapsulated fuel preferably comprises a fuel: water ratio of 70 to 85:30 to 15 by weight, and additionally an inorganic material comprising sodium, chlorine, calcium and magnesium as the active ingredient It is included in the range of 180 to 200ppm sodium, 90 to 110ppm chlorine, 1 to 40ppm calcium, 1 to 20ppm magnesium based on the total weight. The inorganic materials may be added to a process for preparing microencapsulated fuel in a mixed solution state, for example, 0.3 to 0.5% by weight of an aqueous solution in which the inorganic materials are dissolved in about 15 times of water, based on the total weight of the oil and water. It can be prepared by putting in the range. As the source of sodium, for example, but not limited to, NaOH may be used, and as the source of chlorine and calcium, for example, but not limited to, CaCl ₂ .2H ₂ O may be used. As the source of magnesium, for example, but not limited to, MgCl ₂ , MgSO ₄ and MgBr ₂ may be used, and in addition to the water containing KCl, NaCl and the like can be used.

In addition, FIG. 3 conceptually illustrates a principle in which the outermost fuels are split into fine particles 14 capable of complete combustion when the microencapsulated fuel is heated to a high temperature in a combustion chamber.

The method for producing a microencapsulated fuel according to the second object of the present invention comprises the following steps:

a) introducing heated fuel oil;

b) mixing the heated hot water with fuel oil; And

c) microencapsulation by adding and mixing inorganic additives to the mixture of fuel oil and hot water.

In step a), the fuel oil is preheated in advance and added to the mixing step in order to facilitate the transfer by lowering the viscosity of the fuel oil, and to facilitate the mixing with the hot water and the mineral additive thereafter. The preheating temperature will vary depending on the flow characteristics depending on the type of fuel oil used, but for example preheating to about 50 to 60 when heavy oil is used. Preheating may be carried out in a suitable manner suitable for the characteristics of the present invention, such as installing a steam jacket, a heating wire, or the like on the side wall of the fuel oil storage tank, or a steam pipe inside the tank, and appropriate temperature control may be performed. have.

In step b), the preheated hot water is used. In order not to cool the preheated fuel oil, it is preferable to preheat the water at about the same temperature as the fuel oil. The water may be preheated by means of heat tracing by means of suitable heating means, for example heating wires or thin steam tubes, on the water conveying piping as well as the preheating means of the fuel oil described above, and the temperature may also be controlled.

The manufacturing method can be carried out batchwise or continuously.

In the case of a batch type, for example, a stirrer is mounted, optionally a heated amount of fuel oil is introduced into a mixing vessel having a baffle attached to a wall at a predetermined mixing ratio, followed by stirring. Hot water is added, and finally, while adding an inorganic additive, stirring to prepare a microencapsulated fuel. At this time, the particle size of the microencapsulated fuel can be adjusted by adjusting the shape of the stirring blades of the stirrer, the stirring speed, and the like, and the composition of the particles of each microencapsulated fuel, that is, the The composition ratio can be adjusted.

In the case of the continuous type, microencapsulated fuel is produced in the line mixer by sequentially adding fuel oil, hot water, and mineral additives from each raw material tank to the line mixer, and preparing the microencapsulated fuel in the storage tank. May be performed in a stored manner.

In this continuous process, the dosage of fuel oil, water and mineral additives is controlled by metering pumps, or by a suitable flow control system, such as adjusting the pumping speed of the transfer pump or opening and closing the flow control valve of the pump outlet. Can be adjusted.

The eco-friendly clean water-in-oil microencapsulated fuel production system according to the present invention includes a fuel oil storage tank, a fuel oil supply pump, and a fuel oil including a pipe required to transfer fuel oil from a fuel oil storage tank to a fuel oil inlet of a mixing unit. A supply unit; A hot water supply unit configured to include a hot water storage tank, a hot water supply pump, and piping required to transfer hot water from the hot water storage tank to the hot water inlet of the mixing unit; A fuel oil supply unit configured to include a mineral additive storage tank, a mineral additive supply pump, and a piping required to transfer the mineral additive from the mineral additive storage tank to the inorganic additive inlet of the mixing unit; A mixing unit including a fuel oil inlet, a hot water inlet, and an inorganic additive inlet sequentially formed at the front end of the line mixer and the line mixer; And a microencapsulated fuel storage tank unit configured to store the eco-friendly clean water-in-oil type microencapsulated fuel generated by the mixing unit.

Hereinafter, with reference to the accompanying drawings will be described in detail a continuous production system and method for producing a microencapsulated fuel of the present invention.

First, referring to FIG. 3, in the continuous production system of the microencapsulated fuel, fuel oil, hot water, and inorganic additives are sequentially added to the line mixer 50 from each of the raw material tanks 20, 30, and 40. 50) to produce a microencapsulated fuel and store in the microencapsulated fuel storage tank (60).

The fuel oil storage tank 20 of FIG. 3 is provided with a level gauge 22 for checking the amount of fuel oil, and a vent 24 is installed at an upper portion thereof to adjust the pressure in the tank according to the filling and discharge of the fuel oil. The tank outer wall is insulated by the insulation 23. In order to manufacture microencapsulated fuel, the fuel oil supply pump 21 is operated to supply fuel oil to the fuel oil inlet 51 of the mixing unit 50, and a pressure gauge 25 is installed at the outlet of the fuel oil supply pump. Since the pressure of the discharge port can be checked, the flow rate data measured by the fuel oil flow meter 26 provided at the discharge port is provided to the fuel oil flow controller 27 to open and close the fuel oil flow control valve 28 to open the fuel. To control the flow rate.

On the other hand, in the case of supplying microencapsulated fuel directly from the storage tank 60 to a boiler (not shown), a diesel oil (diesel) supply line 29 is additionally installed for operation of the boiler, which is necessary for this operation. Many valves are installed in the fuel oil supply line.

Meanwhile, although not shown in FIG. 3, fuel oil heating means and a temperature gauge, a temperature controller, and a steam control valve or electric power control means may be installed in the fuel oil tank 20.

The hot water supply tank 30 is provided with a temperature gauge 32 for checking the temperature of the water, the vent 34 is installed at the top to adjust the pressure in the tank according to the filling and discharge of hot water, The heat insulating material 33 is constructed and insulated by the tank outer wall. In order to manufacture the microencapsulated fuel, the hot water supply pump 31 is operated to supply hot water to the hot water inlet 52 of the mixing unit 50, and a pressure gauge 35 is installed at the discharge port side of the hot water supply pump 31. It is possible to check the pressure of the discharge port, and provides the flow rate measured by the hot water flow meter 36 installed on the discharge port side to the hot water flow controller 37 to open and close the hot water flow control valve 38 to control the hot water flow rate. And the recycling line 39 for circulating a part of hot water to the hot water tank 30 is provided in the discharge port side line of the hot water supply pump 31.

Meanwhile, although not shown in the hot water supply system of FIG. 3, hot water heating means and a level gauge, a temperature controller, a steam control valve, or a power control means may be installed in the hot water tank 30.

The heat insulating material 43 is constructed and insulated on the outer wall of the inorganic additive supply tank 40. In order to manufacture the microencapsulated fuel, the inorganic additive supply pump 41 is operated to supply the inorganic additive to the inorganic additive inlet 53 of the mixing unit 50, and a pressure gauge ( 45) is installed so that the pressure of the discharge port can be confirmed, and the inorganic additive input amount is controlled by controlling the number of strokes of the inorganic additive supply pump 41 or the rotational speed of the motor. The discharge port side line of the inorganic additive supply pump 41 is provided with a valve 48 capable of controlling the flow rate, and a recycling line 49 for circulating a part of the inorganic additive into the inorganic additive tank 40 is provided. It is installed.

Meanwhile, although not shown in the inorganic additive supply system of FIG. 3, the inorganic additive heating means and the level gauge, the temperature gauge capable of checking the temperature of the water, the temperature controller, and the steam control valve or the power control means, and the upper portion of the inorganic additive filling And a vent or the like for adjusting the pressure in the tank according to the discharge may be installed in the inorganic additive tank 40.

The fuel oil flow rate controller 27, the hot water flow rate controller 37, and the inorganic additive supply pump controller may be interlocked and interlocked with each other.

Referring to FIG. 4, which is an enlarged portion of the mixing unit 50 of the microencapsulated fuel manufacturing system of the present invention illustrated in FIG. 3, the line mixer 54 is arranged in a first angle at an angle inside the casing 56. Mixing elements 57-1, 57-3, ... 57- (2n-1), and second mixing elements 57-2, 57-4, .... 57 arranged at an angle of 90 degrees. -2n) are alternately arranged, and when the fluid passes, the mixing action is performed by repeating the action of reversing the position after half the fluid at the tip of each mixing element. The fuel oil heated through the fuel oil inlet 51 is introduced into the line mixer, and the heated hot water is introduced through the hot water inlet 52 at the rear end thereof, followed by mixing. Then, the inorganic additive is injected through the inorganic additive inlet 53. When introduced, microencapsulated fuel is produced by the action of the mixing elements 57 therein while passing through the line mixer 54. By adjusting the length of the casing 56 of the line mixer and the number of mixing elements 57 or the diameter of the line mixer 54, the speed of the fluid passing through the line mixer 54 is adjusted to control the size of the fuel microcapsules. Can be adjusted. Then, by adjusting the input amount of each raw material, the composition of the particles of each microencapsulated fuel, that is, the composition ratio of each raw material can be adjusted.

Meanwhile, although the line mixer is installed only at the rear end of the inorganic additive inlet port 53 in FIG. 4, the line mixer may be additionally installed at the rear end of the hot water inlet port 52 to facilitate the microencapsulation of the fuel by mixing the fuel oil and the hot water in advance.

The microencapsulated fuel produced while passing through the mixing unit 50 described above is stored in the microencapsulated fuel storage tank 60. This tank is also equipped with a heat tracing 66 to which a temperature control system (not shown) is connected, together with a temperature gauge 62, a heat insulating material 63, a vent 64, a level gauge 65 and the like. When the fuel circulation pump 61 is installed and the microencapsulated fuel is separated from oil and water, the fuel circulation pump 61 is circulated to the mixing unit 50 so as to be microencapsulated again.

The microencapsulated fuel stored in the microencapsulated fuel storage tank 60 may be supplied directly to the combustion system of the boiler or transferred to a fuel storage tank for a boiler at another site.

Example 1

Preparation and Analysis of Batch Microencapsulated Fuel

7 kg of Bunker C oil at 55 ° C. was added to a 20 liter mixed vessel, and 3 kg of hot water at 55 ° C. was added and stirred.

Brine (comprising 17% by weight MgCl ₂ , 8% by weight MgSO ₄ , 3% by weight KCl, 5% by weight NaCl and 0.3% by weight MgBr ₂ ) 1.7g flakes, 3.0g NaOH flakes and 1.4g CaCl ₂ flakes An aqueous solution dissolved in 300 g of 55 ° C. distilled water was added and stirred for 5 minutes to prepare a microencapsulated fuel, and an enlarged photomicrograph of this is shown in FIG. 2B. The diameter of the microcapsules was measured to average about 30μ.

The component and adhesion analysis results of the microencapsulated fuel thus prepared are shown in Table 1 below together with the analysis results of the bunker C oil.

ingredient fuel Bunker C oil Microencapsulated Fuel Water (vol.%) Ash (wt%) sulfur (wt%) carbon (wt%) hydrogen (wt%) nitrogen (wt%) chlorine (ppm) sodium (ppm) calcium (ppm) magnesium (ppm) other metal components (ppm) 0.00 0.02 3.22 80.92 9.14 0.22 4 6 1≥ 1≥ 104 26.6 0.07 2.27 57.22 9.19 0.19 97 200 40 20 79.8 Adhesion (mm ² / s) [50 ℃] 180 287

Examples 2 and 3

A microencapsulated fuel using waste lubricating oil and ship waste oil was prepared in the same manner as above with the following composition.

Example number Furtherance Fuel oil (% by weight) Hot water (% by weight) Inorganic additives {% by weight / (fuel oil + hot water)} 2 Waste Lubricant 75 25 0.4 3 Ship waste oil 85 15 0.5

Example 4

Preparation and Combustion Experiments of Continuous Microencapsulated Fuel

Using a continuous microencapsulated fuel production system configured as shown in FIG. 3, bunker B oil at 60 ° C. was introduced into the fuel oil inlet 51 of the mixing unit 50 at a rate of 8 kg / min, and a hot water inlet ( 52) hot water at 60 ℃ was added at a rate of 2kg / min. Then, the inorganic encapsulated aqueous solution prepared in Example 1 was supplied at a rate of 5.5 g / min to continuously manufacture microencapsulated fuel.

Experimental Example 1

Storage Stability Assessment of Microencapsulated Fuel

500 ml of each microencapsulated fuel prepared in Examples 1 to 4 were put in a mass cylinder and observed for oil-water separation while long-term storage.

Each of the microencapsulated fuels was found to have no oil separation after 40 days.

Experimental Example 2

Combustion Test of Microencapsulated Fuel

Requested by the Korea Petroleum Quality Inspection Service, a combustion test was conducted in a boiler of the microencapsulated fuel and bunker C oil (comparative example) of the present invention under the following conditions.

Boiler test conditions Fuel usage Average 101ℓ / hr Boiler water supply Average 570ℓ / hr Refueling temperature Average 90 ℃ Feed water temperature Average 15.5 ℃ Boiler working pressure 2.5-3.0 kg / cm ² Boiler Outlet Gas Temperature 285-290 ℃ Boiler outlet oxygen concentration 8.5-9.0% Boiler outlet carbon dioxide concentration 8.5-9.0%

The calorific value of each fuel was as follows.

fuel Comparative example Example 1 Example 2 Example 3 Example 4 Calorific Value (cal / g) 10,520 7,010 7,120 7,090 9,610

The phenomenological results from combustion experiments of microencapsulated fuel are summarized as follows:

1) The smoke concentration of the microencapsulated fuel of the present invention was lower than that of the bunker C oil at a low air ratio (m = 1.02, residual oxygen in the combustion chamber = 0.4 to 0.6), and thus it was determined that complete combustion was possible even at a low air ratio.

2) The combustion flame of the microencapsulated fuel of the present invention was pale orange, and unburned oil particles were not observed, but the brightness was lower than that of bunker C oil. This is accompanied by the complete combustion phenomena observed above, in which the microencapsulated fuel of the present invention maintains a perfect water-in-oil emulsion, and as the intended purpose is, the water in the microcapsules explodes at high temperatures while atomizing the fuel and the water vaporizes. Is grasped.

3) The diameter of the flame is larger than bunker C oil.

4) The concentration of nitrogen oxides in the exhaust gas was reduced by 8-11% compared to bunker C oil.

The present invention provides a stable water-in-oil emulsion type microencapsulated fuel, a method for producing the same, and a system for producing the same, which do not generate oil-water separation even when heated to a high temperature.

The microencapsulated fuel according to the present invention is introduced into a combustion chamber of a boiler without being separated from oil and water even at a high temperature, thereby making it possible to completely burn the particulate fuel oil by explosion of water particles in the center, thereby enabling energy to be saved and reducing air pollutants. Heavy oils such as waste lubrication oil, ship waste oil, bunker C oil and bunker B oil can be completely combusted as fuel, making it possible to utilize waste oil as a fuel and reducing environmental pollution. You can get it.

In addition, the present invention provides a manufacturing method and a manufacturing system capable of efficiently producing a microencapsulated fuel having the above excellent effects.

Claims (12)

Eco-friendly clean water-in-oil type microencapsulated fuel consisting of water particles, an inorganic additive layer formed on the outside of the water particles, and a hydrophobic fuel oil layer formed on the outside of the inorganic additive layer. The environment-friendly clean water-in-oil type microencapsulated fuel according to claim 1, wherein the fuel oil is bunker C oil, bunker B oil, waste lubricating oil, marine waste oil, or a mixture thereof. 3. The microencapsulated fuel according to claim 1 or 2, wherein the microencapsulated fuel comprises a weight ratio of fuel to water of 70 to 85:30 to 15, and the inorganic additive is 180 to 200 ppm of sodium based on the total weight of the microencapsulated fuel, chlorine. Eco-friendly water-in-oil microencapsulated fuel contained in the range of 90 to 110ppm, calcium 1 to 40ppm, magnesium 1 to 20ppm. According to claim 3, wherein the sodium of the inorganic additives are supplied in the form of NaOH, chlorine and calcium is supplied in the form of CaCl ₂ · 2H ₂ O, magnesium is in the form of a guard water containing MgCl ₂ , MgSO ₄ and MgBr ₂ Eco-friendly clean water-in-oil microencapsulated fuel that is supplied by. a) introducing heated fuel oil; b) mixing the heated hot water with the fuel oil; And c) adding an inorganic additive to the mixture of fuel oil and hot water, and mixing and microencapsulating the environmentally friendly water-in-oil type microencapsulated fuel. The method of claim 5, wherein the fuel oil is bunker C oil, bunker B oil, waste lubricating oil, marine waste oil, or a mixture thereof. The method of claim 5, wherein the fuel oil and hot water are heated in a range of 50 to 60 ° C. 8. A fuel oil supply unit configured to include a fuel oil storage tank, a fuel oil supply pump, and a pipe required to transfer the fuel oil from the fuel oil storage tank to the fuel oil inlet of the mixing unit; A hot water supply unit configured to include a hot water storage tank, a hot water supply pump, and piping required to transfer hot water from the hot water storage tank to the hot water inlet of the mixing unit; A fuel oil supply unit configured to include a mineral additive storage tank, a mineral additive supply pump, and a piping required to transfer the mineral additive from the mineral additive storage tank to the inorganic additive inlet of the mixing unit; A mixing unit including a fuel oil inlet, a hot water inlet, and an inorganic additive inlet sequentially formed at the front end of the line mixer and the line mixer; And Eco-friendly clean water-in-oil type micro-encapsulated fuel production system comprising a micro-encapsulated fuel storage tank unit for storing the environment-friendly clean water-in-oil type microencapsulated fuel generated by the mixing unit. 9. The line mixer according to claim 8, wherein the line mixer is configured to alternately arrange a first mixing element disposed at an angle within the casing and a second mixing element arranged at an angle of 90 degrees, and the fluid passes through the line mixer. Eco-friendly clean water-in-oil type microencapsulated fuel production system, characterized in that the mixing function by repeating the action of reversing the position after half the fluid at the front end of each mixing element. 10. The fuel oil, hot water and inorganic additives supplied from the fuel oil supply unit, the hot water supply unit, and the inorganic additive supply unit to the mixing unit are each controlled by a flow rate control system. Eco-friendly clean water-in-oil type microencapsulated fuel production system. 10. The environment-friendly clean water-in-oil type microencapsulated fuel production system according to claim 8 or 9, wherein the fuel oil storage tank and the hot water storage tank are each provided with means for heating fuel oil and hot water. The environment-friendly clean water-in-oil type microencapsulated fuel manufacturing system according to claim 8, wherein the microencapsulated fuel storage unit is provided with a pump and a pipe for circulating fuel to the mixing unit.

Images