CN100513534C - Modified fuel oil and production thereof - Google Patents

Abstract

The invention provides a modified fuel oil and a production method thereof. The modified fuel oil contains: (a) 10-70 parts by weight of heavy oil; (b) 30-90 parts by weight of diesel oil; and the total amount of heavy oil and diesel oil is 100 parts by weight, and (c) water, And the weight ratio between water and the total oil of heavy oil plus diesel oil is 5:95-30:70; wherein, 98% of the water exists in the form of water droplets of 0.1-3 microns, and more than 95% of the water droplets have a particle size of less than 2 Micron. The modified fuel oil of the invention has good stability, very good atomization, sufficient combustion and minimal pollution, and is a clean fuel with low cost.

Description

A kind of modified fuel oil and its production method

technical field

The invention relates to the fields of environmental protection and fuel processing, and more specifically relates to a modified fuel oil and a production method thereof.

Background technique

Diesel is an important fuel. Due to its high calorific value and ease of use, it is widely used as fuel for small and medium boilers, heating furnaces and small and medium industrial kilns in addition to being used as fuel for vehicle and ship engines. The consumption is very large. However, the price of diesel oil is relatively high, especially in recent years, the price of oil has been high, and the price of diesel oil has also risen, which has greatly increased the cost of enterprises. Therefore, reducing fuel costs has become an urgent goal for people.

Heavy oil is a kind of widely used liquid fuel. It mainly comes from the residual oil after petroleum refining, which is blended by adding an appropriate amount of light oil. It is used as fuel for industrial boilers, heating furnaces and industrial kilns. Its viscosity is moderate, its combustion performance is good, its calorific value is large, and its price is much lower than that of diesel. Attempts have been made to replace diesel with heavy oil to reduce fuel costs for businesses.

However, heavy oil cannot be directly burned on diesel boilers for the following reasons: first, the viscosity of heavy oil is much higher than that of diesel oil, and the heavy oil must be heated to raise its temperature to a level suitable for atomization. The temperature before entering the nozzle is generally at 100 Between -140°C, this requires oil tanks and pipelines to have heat-tracing facilities, but the general diesel combustion system does not have heat-tracing facilities, so it is difficult to transport and atomize; second, heavy oil contains more residual carbon and asphaltenes , colloid and mechanical impurities, their existence can easily lead to clogging of filter screens and fuel injectors, and can also easily cause insufficient combustion, resulting in excessive pollutant emissions.

People used to simply mix heavy oil and diesel oil to prepare blended oil and burn it on diesel boilers or industrial heating furnaces, but the effect was not satisfactory. The main disadvantages are poor atomization, insufficient combustion, carbon deposits, high pollutant emissions, and clogging of fuel injectors. Therefore, simple blends of heavy oil and diesel oil are difficult to popularize and apply.

US Patent No. 4,400,177 reports that the mixture of heavy oil and diesel oil can be prepared into emulsified fuel with good stability by ultrasonic emulsification technology, but the particle size of water in the emulsified oil and the data of the stability of the emulsified fuel oil are not given. In addition, ultrasonic emulsification technology consumes a lot of energy, making it difficult to achieve industrialized mass production.

To sum up, in order to effectively reduce fuel costs, there is an urgent need in this field to develop new low-cost and clean-burning fuel oils and their preparation methods.

Contents of the invention

The object of the present invention is to provide a modified fuel oil with low cost and clean combustion and a preparation method thereof.

In a first aspect of the present invention, a modified fuel oil is provided, which contains:

(a) heavy oil of 10-70 parts by weight;

(b) 30-90 parts by weight of diesel; and

(c) water,

Wherein, the total amount of heavy oil and diesel oil is 100 parts by weight, and the weight ratio between water and the total oil of heavy oil and diesel oil is 5:95-30:70; more than 98% of the water is in the form of water droplets with a particle size of 0.1-3 microns form, and the average particle size of the solid particles in the oil is 1-5 microns.

In another preferred example, more than 95% of the water exists in the form of water droplets with a particle size of less than 2 microns.

In another preferred example, the average particle size of the solid particles is 1-3 microns.

In another preferred example, the weight ratio of water to the total oil of heavy oil plus diesel oil is 8:92-20:80.

In another preferred example, the heavy oil is selected from: No. 4 to No. 7 fuel oil, No. 180 heavy oil, No. 380 heavy oil, No. 250 heavy oil, residual oil, coal tar from non-petroleum sources, shale oil, plant Oils of animal origin, waste oils and mixtures thereof.

In another preferred example, the diesel oil is selected from the group consisting of marine diesel oil, light diesel oil from No. 10 to No. 50, and mixtures thereof.

In another preferred embodiment, the water is selected from fresh water, industrial wastewater, weakly acidic water with a pH value of 4-6, weakly alkaline water with a pH value of 8-11, or hard water.

In another preferred example, when the fuel oil is stored at 20°C for more than 6 months, the oil and water will not separate; or at 80°C for more than 3 months, the oil and water will not separate.

In another preferred embodiment, it also contains 0.01-10 parts by weight of additives selected from the group consisting of emulsifiers and desulfurizers.

In the second aspect of the present invention, a kind of preparation method of modified fuel oil is provided, the method comprises the following steps:

(i) (a) 10-70 parts by weight of heavy oil, (b) 30-90 parts by weight of diesel oil, and (c) water are mixed to form a raw material mixture, wherein the total amount of heavy oil and diesel oil is 100 parts by weight , and the weight ratio between water and the total oil of heavy oil plus diesel oil is 5:95-30:70,

(ii) Grinding the raw material mixture so that more than 98% of the water in the fuel exists in the form of water droplets with a particle diameter of 0.1-3 microns, and the particle diameter of more than 95% of the water droplets is less than 2 microns and the average particle size of the solid particles is 1 -5 microns to obtain modified fuel oil;

Or the method includes the steps:

(a) heavy oil of 10-70 parts by weight (b) diesel oil of 30-90 parts by weight and (c) water are sent into grinding equipment for grinding, wherein the total amount of heavy oil and diesel oil is 100 parts by weight, and water and The weight ratio between heavy oil and diesel oil is 5:95-30:70, so that more than 98% of the water in the fuel exists in the form of water droplets with a particle size of 0.1-3 microns, and more than 95% of the water droplets have a particle size smaller than 2 microns and the average particle size of solid particles is 1-5 microns, thereby obtaining modified fuel oil.

Detailed ways

The inventor has found through in-depth and extensive research that: the raw material mixture formed by mixing heavy oil, diesel oil and water, after ultrafine grinding and homogenization, when more than 98% of the water exists in the form of water droplets with a particle size of 0.1-3 microns, And the particle size of more than 95% of the water droplets is less than 2 microns, and at the same time, a fuel oil with a new structure is formed with oil as the continuous phase and water as the dispersed phase. In this kind of fuel oil, the fuel oil emulsion is very stable because the particles are fine and evenly distributed. And because the oil is surrounded by ultra-fine water droplets, it is easy to disperse and atomize, so that the combustion is very complete, so the fuel oil is a clean fuel. The present invention has been accomplished on this basis.

As used herein, the terms "fuel oil of the present invention", "fuel composition of the present invention", "modified fuel oil of the present invention", "modified fuel oil composition of the present invention" are used interchangeably and refer to The water-in-oil mixture contains heavy oil, diesel oil and water, and more than 98% (more preferably more than 99%, most preferably more than 99.9%) of the water droplets have a particle size of 0.1-3 microns.

Fuel oil of the present invention can replace diesel oil, and it is basically a kind of water-in-oil emulsified mixed fuel oil composed of heavy oil, diesel oil and water in a certain proportion, as fuel for diesel boilers, industrial heating furnaces and industrial kilns. The cost is much lower than the corresponding diesel.

The modified fuel oil of the present invention is a kind of water-in-oil emulsified fuel oil. One of its important features is that the water droplets in the emulsified fuel are extremely fine, and more than 98% of the water droplets have a particle size in the range of 0.1-3 microns, and 95% The particle size of the above water droplets is less than 2 microns.

Another important feature of the modified fuel oil of the present invention is that solid carbon residue and mechanical impurity particle size are very fine wherein, the average particle diameter is at 1-5 micron (beer 1-4 micron), most (90% above) between 1-3 microns.

heavy oil

The heavy oil that can be used in the present invention is not particularly limited, representative example includes (but not limited to): the fuel oil of No. 4 to No. 7 grades in my country's fuel oil industry standard (SH/T0356-1996), also can be Imported No. 180, No. 380 heavy oil and imported heavy oil of other brands can also be domestic No. 250 heavy oil and residual oil. It can also be non-petroleum source coal tar, shale oil, vegetable and animal source oils, waste oil of the above-mentioned various oils and mixtures of the above-mentioned various oils, etc.

In the fuel oil of the present invention, expressed in parts by weight, the amount of heavy oil is usually between 10-70 parts by weight, preferably between 40-60 parts by weight. When the amount of heavy oil is less than the above range (10 parts by weight), the cost reduction is not obvious, and when the amount of heavy oil is greater than the above range (70 parts by weight), the viscosity of the fuel oil may be too high.

diesel fuel

The diesel oil that can be used in the present invention is not particularly limited, including various conventional light diesel oils, representative examples include (but not limited to): marine diesel oil, No. 10 in the national standard GB/252-94 and the light oil of the following brands Diesel oil (such as light diesel oil from No. 10 to minus No. 50). They can also be distilled diesel or diesel produced by catalytic cracking.

In the fuel oil of the present invention, expressed in parts by weight, the amount of diesel oil used is generally between 30-90 parts by weight, preferably between 40-60 parts by weight. When the amount of diesel oil is less than the above range (30 parts by weight), the viscosity of the fuel oil will be too high, and when the amount of diesel oil is greater than the above range (90 parts by weight), the cost reduction is not obvious.

In addition, in a preferred example, the weight ratio of heavy oil and diesel oil in the modified fuel oil can be between 10:90-70:30, generally between 40:60-60:40.

water

Water that can be used in the present invention is not particularly limited, and representative examples include (but are not limited to): fresh water, including river water, lake water, tap water, well water, ground water, and other sources of fresh water, and industrial wastewater containing organic matter , It can also be weakly acidic water with a pH value of 4-6 or weakly alkaline water with a pH value of 8-11 or hard water containing trace amounts of inorganic substances.

In the fuel oil of the present invention, expressed in parts by weight, the amount of water used is usually between 5-30 parts by weight, preferably between 8-20 parts by weight. In addition, the weight ratio of water to oil (heavy oil plus diesel oil) is between 5:95-30:70, generally between 8:92-20:80. When the amount of water is less than the above range (5 parts by weight), the atomization performance of fuel oil will not be improved much, which will easily lead to incomplete combustion; when the amount of water is greater than the above range (30 parts by weight), the emulsified oil will be converted from water-in-oil For the oil-in-water type, the emulsified oil becomes unstable.

extra ingredients

Various conventional additives, such as emulsifiers, desulfurizers, stabilizers, etc., can also be added to the modified fuel oil of the present invention. These additives can be used in conventional amounts, usually 0.01-10 parts by weight, preferably 0.1-5 parts by weight.

For example, in the preparation method of the modified fuel oil of the present invention, an emulsifier can also be used. Emulsifiers are organic long-chain polar molecules with a hydrophilic chemical group at one end, such as, but not limited to, the following groups: carboxyl, amino, amide, sulfonic acid, hydroxyl, ether, etc. One end is a lipophilic long-chain chemical group, such as an alkyl group and an aromatic group. The emulsifier can also be a polymer compound, including (but not limited to): polyethylene oxide, polyoxymethylene, polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, gelatin, polyacrylamide, polyacrylic acid and its esters class etc. These emulsifiers can be used alone or in combination of two or more selected ones. The amount of emulsifier is usually 0.01-1 parts by weight.

The desulfurizer can be limestone, dolomite and lime and other organic or inorganic substances containing calcium or magnesium or a mixture of these substances. The desulfurizing agent described in the present invention can be not through superfine grinding (as the desulfurizing agent with average particle size greater than 20 microns), but the preferred desulfurizing agent is through superfine grinding, or commercially available superfine calcium carbonate etc., The desulfurizer whose average particle size is below 20 microns can further improve the desulfurization effect. Lime slurry can also be used as a desulfurizer.

In addition, although other fuel substances (such as gasoline, ultra-fine coal powder, etc.) can be added to the modified fuel oil of the present invention, it is usually not necessary to further add other fuels from the perspective of cost and safety.

Preparation

The invention also provides a production method of the modified fuel oil.

The production method of modified fuel oil of the present invention comprises steps:

(i) mixing (a) 10-70 parts by weight of heavy oil, (b) 30-90 parts by weight of diesel oil, (c) an appropriate amount of water and (d) optional additional ingredients (such as emulsifiers), to form a raw material mixture,

(ii) Grinding the raw material mixture so that more than 98% of the water in the fuel exists in the form of water droplets of 0.1-3 microns, and more than 95% of the water droplets have a particle size of less than 2 microns, thereby obtaining modified fuel oil.

In another preferred embodiment, the method comprises the steps of: (a) 10-70 parts by weight of heavy oil (b) 30-90 parts by weight of diesel oil, (c) an appropriate amount of water and (d) optional additional Components (such as emulsifiers) are sent to the grinding equipment sequentially or simultaneously for grinding, so that more than 98% of the water in the fuel exists in the form of water droplets of 0.1-3 microns, and more than 95% of the water droplets have a particle size of less than 2 microns, thereby obtaining Modified fuel oil.

The method of grinding is not particularly limited, it can be an existing ultrafine grinding or crushing method in the art, as long as it can make the particle diameter of water particles (i.e. water droplets) and solid particles (comprising solid carbon residue and mechanical impurities) in the fuel reach desired size.

In a preferred example of the present invention, heavy oil, diesel oil and water are added in a certain proportion to the rotating pulse ultrafine particle powder dissolving machine (hereinafter referred to as "mixing ultrafine grinding machine") produced by Shanghai Fine Powder Dissolving Machinery Equipment Co., Ltd. ) (Chinese Patent Application No.: 01109394.3) is mixed and superfinely ground to become fuel oil, so that the particle size (or particle size) of water droplets, solid residual carbon and mechanical impurities in the fuel can reach the required size.

When the raw material composition is ground to a very small particle size of water droplets and solid particles, the oil, organic matter, water and other tiny particles in the modified fuel oil can be very uniformly distributed, the state is stable, the viscosity is low, and it has good fluidity , can be used in existing diesel boilers.

The production method of the present invention can be continuous or batch. The preferred mode is continuous. A preferred production method is to simultaneously send heavy oil, diesel oil and water into a mixing ultra-fine grinding machine through a metering device according to the required ratio for mixing and ultra-fine grinding, and flow operation can realize continuous production. In addition, according to the needs, the material can be ground multiple times, or two or more sets of mixing ultra-fine grinding equipment can be used in series to obtain finer and more uniformly mixed modified fuel oil.

In addition, the production of modified fuel oil can also be carried out step by step, for example, heavy oil and water are mixed, ground and emulsified to prepare emulsified heavy fuel oil, and then the emulsified oil and diesel oil are mixed and ground to homogeneously prepare the present invention The modified fuel oil; or firstly make diesel oil and water into emulsified diesel oil, and then mix and grind the emulsified diesel oil and heavy oil to make a modified fuel oil; it is also possible to first mix and grind the heavy oil and diesel oil , to make mixed oil, and then add water to grind and emulsify to make modified fuel oil; it is also possible to add heavy oil, diesel oil and water to a grinding emulsifier at the same time for mixing, grinding and homogeneous emulsification to prepare modified fuel oil. The production of modified fuel oil by step-by-step mixing and superfine grinding can also be continuous or intermittent. The preferred method is continuous, because the production efficiency is relatively high.

Because fuel oil, especially heavy oil, has high viscosity and poor fluidity at relatively low temperatures, the material temperature during production can be higher than room temperature and controlled within the range of 30-90°C, preferably within the range of 50-80°C.

The main advantages of the present invention are:

(a) The modified fuel oil of the present invention is very uniform in texture, and there are no small agglomerates with high viscosity locally. Its viscosity is much lower than that of raw material heavy oil, close to the viscosity of diesel oil in the mixed fuel, and there are few large particles of residual carbon and solid impurities. Block the filter, not block the fuel injector.

(b) The modified fuel oil of the present invention burns quickly and fully, has short flame and high flame temperature, improves the thermal efficiency of boilers, industrial kilns and industrial heating furnaces, and has the effect of saving fuel.

(c) The modified fuel oil in the present invention has very good stability, and the oil and water do not separate when placed at room temperature for more than 6 months, and when placed at 80° C. for more than 3 months.

(d) Because it is an emulsified fuel, the atomization is very good, the combustion is complete, and the pollutants such as nitrogen oxides, carbon monoxide, volatile organic compounds and carbon particles formed due to incomplete combustion are less, and it can meet the air pollution of diesel boilers stipulated by the state. It is a kind of clean fuel. When the sulfur content in the fuel is relatively high, by adding an appropriate amount of desulfurizer, the emission of sulfur dioxide can meet the national emission standards for diesel boilers.

(e) The preparation method of the modified fuel oil of the present invention has a large production capacity and can realize industrial-scale production.

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. For the experimental methods without specific conditions indicated in the following examples, the conventional conditions or the conditions suggested by the manufacturer are usually followed.

Example 1

(1) Raw materials: heavy oil - imported heavy oil No. 180,

  Domestic No. 0 diesel oil,

Tap water.

(2) Ingredients formula (weight, tons):

  No. 180 Heavy Oil - 45,

Diesel No. 0 - 45,

Water - 10.

(3) Material flow rate (kg/hour):

Heavy oil - 1800, diesel - 1800, water - 400.

(4) Material temperature (°C):

Heavy oil - 50, diesel - 50, water - 50.

(5) Equipment: mixing ultrafine grinder (Shanghai Fine Powder Dissolution Machinery Equipment Co., Ltd., CN01109394.3).

(6) Preparation step: send No. 180 heavy oil and water into the above-mentioned grinding and emulsifying machine at the same time according to the above temperature and flow rate with a liquid delivery pump, and carry out grinding and emulsification to make emulsified heavy oil. Then the diesel oil and the prepared emulsified heavy oil are simultaneously sent to the next grinding and emulsifying machine in series for mixing and grinding to prepare modified fuel oil. The grinding and emulsifying process is a continuous operation. The temperature of the emulsified heavy oil is between 50-60°C and the flow rate is 2200 kg/hour, the temperature of the diesel oil is 50°C and the flow rate is 1800 kg/hour.

(7) Indicators of modified fuel oil products

Appearance: black liquid with good fluidity,

Density (20°C) (kg/m3): 921.7

Kinematic viscosity (40°C) (mm2/s): 20

Flash point (closed cup) (°C): ≮80

Ash (weight%): <0.10

Mechanical impurities (weight%): ≤0.15

Stability - no separation of oil and water at room temperature (20°C) for more than 6 months, and no separation of oil and water at 80°C for more than 3 months.

Water droplet size in modified fuel oil: 0.1-3 microns, 95% less than 2 microns.

Solid average particle size: 1-3 microns.

[Note: the relevant particle size analysis in the present invention uses a laser particle size analyzer. The light source of the instrument is a helium-neon laser with a wavelength of 0.6328μm and a power of 2mW. The samples were diluted with gasoline, and gasoline was used as the medium. Using the light scattering theory of particles, the particle size is different, the scattering angle is also different, the intensity of scattered light is measured at different scattering angles, and the average particle size and distribution of the particles are given by computer processing. The average particle size here is taken as the particle size of 50% of the cumulative distribution, and the following examples are the same. ]

(8) Combustion performance: Combust the prepared modified fuel oil on a 4-ton diesel steam boiler in a certain company, without changing the boiler settings and the original burner, and control the temperature of the modified fuel oil at 40-50°C During the period, the filter was not clogged, the nozzle was not clogged, the atomization was good, the combustion was sufficient, the flame was white and bright, and there was no black smoke. After one month of operation, there was no carbon and ash deposit in the fuel injector and the furnace.

Example 2

(1) raw material: heavy oil is with embodiment 1, and diesel oil is with embodiment 1, and water is with embodiment 1.

Emulsifiers - Polyoxyethylene Lauryl Ether and Sorbitan Tristearate.

(2) Raw material formula (weight, ton): heavy oil-42.5, diesel oil-42.5, water-15. The dosage of the emulsifier is 0.3% of the weight of the modified fuel oil (the ratio of the two emulsifiers is 50:50).

(3) Raw material flow rate (kg/hour): heavy oil-1700, diesel-1700, water-600.

(4) Raw material temperature (°C): same as Example 1.

(5) Grinding and emulsifying equipment: the same as in Example 1.

(6) Preparation procedure: first mix the emulsifier with water to make a mixed solution with an emulsifier concentration of 2%, then mix the mixed solution of the emulsifier and water with heavy oil to grind and emulsify to make emulsified heavy oil, emulsified heavy oil It is then mixed with diesel oil and ground to prepare modified fuel oil.

(6) Product indicators

 Appearance: black liquid with good fluidity,

Density (20°C, kg/m3): 923.8

Kinematic viscosity (40°C, mm2/s): 17

  Flash point (closed cup, °C): ≮80

Ash content (weight%): <0.10

  Mechanical impurities (weight%): ≤0.15

 Stability: Oil and water will not separate when placed at room temperature (20°C) for more than 6 months.

  The oil and water will not separate when stored at 80°C for more than 3 months.

 The particle size of water droplets in the emulsion: 0.1-3 micron range (>99%), 95% is less than

1.8 microns.

  Average particle size of solids: less than 3 microns

(7) Combustion performance: Combust the prepared modified fuel oil on a 6-ton diesel steam boiler in a certain company, without changing the boiler settings and the original burner, and control the temperature of the modified fuel oil at 40-50°C During the period, the filter was not clogged, the nozzle was not clogged, the atomization was good, the combustion was sufficient, the flame was white and bright, and there was no black smoke. After 2 months of operation, there was no carbon and ash deposit in the fuel injector and the furnace.

Example 3

(1) Raw material: heavy oil-import No. 180 low-sulfur heavy oil (measured sulfur content 0.8%), diesel oil, water are the same as embodiment 1, without emulsifier.

  Desulfurizer - active superfine light calcium carbonate.

(2) Raw material formula (weight, ton): heavy oil-36, diesel oil-54, water-10. The dosage of calcium-containing desulfurizer is controlled so that the stoichiometric ratio of calcium to sulfur in oil is 1.5 to 1.

(3) Material flow rate (kg/hour): heavy oil-1440, diesel-2160, water-400.

(4) Material temperature: heavy oil, diesel oil, water -80°C, calcium carbonate - room temperature.

(5) emulsification equipment: with embodiment 1.

(6) Preparation procedure: first prepare modified fuel oil without desulfurizing agent according to the procedure in Example 1, then add desulfurizing agent and grind it twice to prepare modified fuel oil containing desulfurizing agent.

(7) Product index

Appearance: black viscous fluid.

Density (20°C, kg/m3): 965.1

Kinematic viscosity (40°C, mm2/s): 35

  Flash point (closed cup, °C): ≮80

Stability: oil and water will not separate when placed at room temperature (20°C) for more than 6 months;

  The oil and water will not separate when stored at 80°C for more than 3 months.

 Water droplet size in modified fuel oil: 0.5-3 micron range (>99.9%

water), 95% less than 2 microns.

  Average particle size of solids: less than 3 microns.

(8) Combustion performance: Combust the prepared modified fuel oil on a 6-ton diesel steam boiler in a certain company, without changing the boiler settings and the original burner, and control the temperature of the modified fuel oil at 40-50°C During the period, the filter was not clogged, the nozzle was not clogged, the atomization was good, the combustion was sufficient, the flame was white and bright, and there was no black smoke. After one month of operation, there was no carbon and ash deposit in the fuel injector and the furnace.

(9) Sulfur removal efficiency: Compared with the modified fuel without adding desulfurizer, the initial emission concentration of sulfur dioxide in the flue gas is reduced by 53%.

Example 4-7

According to the same method of embodiment 1, prepare the fuel oil of following formula:

Example 4 Example 5 Example 6 Example 7 Heavy oil (kg) 10 70 40 60 Diesel (kg) 90 30 60 40 water (kg) 5 20 8 15 Emulsifier*(kg) 0 0.5 0.2 0.3 Desulfurizer**(kg) 0 0 0 0

*Emulsifiers are polyoxyethylene lauryl ether and sorbitan tristearate (50:50).

**The desulfurizer is active superfine light calcium carbonate.

As a result, black viscous liquid fuel oil was also obtained, and the oil and water did not separate when placed at room temperature (20° C.) for more than 6 months; the oil and water did not separate when placed at 80° C. for more than 3 months. The particle size of water droplets in each of the modified fuel oils of Examples 4-7: in the range of 0.5-3 microns, 95% of which are less than 2 microns. Solid average particle size: 1-3 microns.

All documents mentioned in this application are incorporated by reference in this application as if each were individually incorporated by reference. In addition, it should be understood that after reading the above teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (11)

1. modified fuel oil is characterized in that it contains:

(a) heavy oil of 10-70 parts by weight;

(b) diesel oil of 30-90 parts by weight; With

(c) water,

Wherein, the total amount of heavy oil and diesel oil is 100 weight parts, and the weight ratio that water and heavy oil add between total oil of diesel oil is 5:95-30:70; Water more than 98% exists with the water droplet form of particle diameter 0.1-3 micron, and the mean particle size of solid particulate matter is the 1-5 micron in the oil, and wherein the water more than 95% exists with the water droplet form of particle diameter less than 2 microns.

2. modified fuel oil as claimed in claim 1 is characterized in that, the mean particle size of solid particulate is the 1-3 micron.

3. modified fuel oil as claimed in claim 1 is characterized in that, the weight ratio that water and heavy oil add between total oil of diesel oil is 8:92-20:80.

4. modified fuel oil as claimed in claim 1, it is characterized in that, described heavy oil is selected from: No. 4 to No. 7 oil fuel, the oils of the coal tar of No. 180 heavy oil, No. 380 heavy oil, No. 250 heavy oil, residual oil, non-petroleum sources, shale oil, plant origin, the oils of animal-origin, waste oil and composition thereof.

5. modified fuel oil as claimed in claim 1 is characterized in that, described diesel oil is selected from down group: marine diesel oil, No. 10 to negative No. 50 solar oil, and composition thereof.

6. modified fuel oil as claimed in claim 1 is characterized in that, described wet concentration is from alkalescent water or the hard water of fresh water, trade effluent, pH value 4-6 weakly acidic water, pH value 8-11.

7. modified fuel oil as claimed in claim 1 is characterized in that, described oil fuel is placed more than 6 months down at 20 ℃, and profit does not separate; Or place at 80 ℃ that profit does not separate more than 3 months.

8. modified fuel oil as claimed in claim 1 is characterized in that, also contains the additive of organizing under being selected from of 0.01-10 parts by weight: emulsifying agent, sweetening agent.

9. modified fuel oil as claimed in claim 1 is characterized in that, described oil fuel is by the heavy oil of (a) 10-70 parts by weight; (b) diesel oil of 30-90 parts by weight; (c) water is formed.

10. the preparation method of a modified fuel oil is characterized in that, this method may further comprise the steps:

(i) with the heavy oil of (a) 10-70 parts by weight, the diesel oil and (c) the water mixing of (b) 30-90 parts by weight, form raw mix, wherein the total amount of heavy oil and diesel oil is 100 weight parts, and water and heavy oil add weight ratio between total oil of diesel oil be 5:95-30:70 and

(ii) raw mix is ground, the above water of in the fuel 98% is existed with the water droplet form of particle diameter 0.1-3 micron, and the mean particle size of solid particulate matter is the 1-5 micron to the particle diameter of the water droplet more than 95% less than 2 microns, thereby obtains modified fuel oil.

11. the preparation method of a modified fuel oil, it is characterized in that, this method comprise with the diesel oil of heavy oil (b) the 30-90 parts by weight of (a) 10-70 parts by weight and (c) water send into grinding plant and grind, wherein the total amount of heavy oil and diesel oil is 100 weight parts, and the weight ratio that water and heavy oil add between total oil of diesel oil is 5:95-30:70, water more than 98% in the fuel is existed with the water droplet form of particle diameter 0.1-3 micron, and the mean particle size of solid particulate is the 1-5 micron to the particle diameter of the water droplet more than 95% less than 2 microns, thereby obtains modified fuel oil.