JP2862406B2 - Heavy oil fuel reformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to industrial, related to <br/> the reformer of heavy oil fuels used in heavy oil-fired boiler or the like for business.

[0002]

2. Description of the Related Art In a conventional heavy oil combustion system in a boiler or the like, only a process of raising the temperature of the heavy oil and improving spraying by a burner due to a decrease in viscosity has been performed. FIG. 2 is a system diagram of a conventional combustion apparatus of this type, in which heavy oil is directly sent from a fuel tank 10 to a boiler 30 by a pump 20 for combustion.

[0003]

A fuel with a low volatility, such as heavy oil, cannot completely burn even in a spray state with a fairly good burner (approximately 100 μm in average spray particle size), and does not burn unburned dust. Often occur.

[0004] This is because the burning rate of residual carbon in the fuel is very slow, and the structure of residual carbon having such a slow burning rate is a "flow structure". Even with the same residual carbon, those with a “mosaic structure” have a high burning rate and excellent burn-out properties, but most of the residual carbon in heavy oil forms a “flow structure”.

[0005] The "mosaic structure" refers to a state in which residual carbon exists as a group of apparent particles having a size of about several µm. The "flow structure" refers to a state in which residual carbon is a particle group. It is a state that does not exist and exists for a long time as if it were flowing.

[0006] The present invention is directed to reforming heavy oil fuel which can solve the above-mentioned problems associated with conventional heavy oil combustion.
That can be incorporated into conventional combustion systems,
Add additives for reforming oil fuel efficiently and effectively
Can be adjusted to prevent obstruction in combustion in the burner
It is an object of the present invention to provide a heavy oil fuel reforming apparatus that does not generate .

[0007]

The heavy oil fuel reforming apparatus of the present invention comprises adding a fine powdered additive and an iron-based material to heavy oil, mixing and stirring the same, and converting the iron-based material. a fine powder and mixing agitator Ru is mixed the fine powder additive to the heavy oil of the same iron-based material causes wear, it has been removed from the mixing stirrer
A coarse particle classifier for separating coarse particles from the mixture;
The coarse particles separated by the classifier are returned to the mixing stirrer.
It is characterized by being constituted .

[0008]

According to the device of the present invention, heavy oil is added for reforming.
Mixing the material obtained by adding fine powder additive and ferrous material as Addendum
By mixing and stirring in the mixing stirrer, the mixing state of the fine powder additive and the heavy oil becomes uniform due to the collision and friction of the iron-based material. At the same time, the fine powder of the iron-based material is uniformly mixed in the heavy oil due to the wear of the iron-based material.

Next, coarse particles are separated from this mixture by coarse classification.
Separated by a mixer and returned to the mixing stirrer to mix and stir again
Since it is, separating the coarse iron-based material from heavy oil
It is adjusted grain size of the ferrous material to be mixed can, in which heavy oil that has been modified fine powder was homogeneously mixed pulverulent additive and ferrous material is obtained.

[0010] In this modified heavy oil, the finely powdered additive uniformly mixed serves as a nucleus to form a "flow structure" of residual carbon.
Has a “mosaic structure” with a fast burning rate. In addition, the fine powder of the iron-based material mixed into the heavy oil serves as a combustion catalyst in a high temperature region in the combustion field, and promotes a “mosaic structure” of the residual carbon, promotes a combustion reaction, and reduces the amount of unburned soot and dust. Reduce. Therefore, the reformed heavy oil is efficiently burned in a state where the amount of unburned dust is small.

Further, iron-based coarse particles are removed from the heavy oil, so that the burner and the like are not damaged. The particle size of the fine powder additive used in the present invention is preferably as small as possible from the viewpoint of changing the state of the residual carbon in the heavy oil from the “flow structure” to the “mosaic structure” as a core. 2mm
The following is desirable. In addition, the finely powdered additive may basically be particles having a diameter as small as possible, but it is necessary to avoid those that adversely affect the properties of the combustion exhaust gas, and fine powders such as carbon black, Ca, iron (Fe), etc. Is used.

Further, as the iron-based material, Fe, Fe ₂ O
_3, F _e3 O ₅ or the like is used, mixing of the, the particle size of the fine powder of iron-based material be 0.2mm or less contained in the heavy oil separated coarse iron-based material after stirring desirable.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. The fuel tank 10 is connected to a rod shell via a pump 20.
It is connected to a rotary mixing stirrer 40 such as
As an additive for heavy oil fuel reforming,
The powdery additive 42 and the iron-based material 44 such as iron scrap are supplied.
It is. A coarse particle classifier 50 is connected to the mixing stirrer 40 on the downstream side.
The coarse particles in the mixture formed by the mixing stirrer 40
Separated. The coarse particles are fed from a coarse classifier 50 to a mixing stirrer 4.
0 to the mixing stirrer 40 by appropriate feeding means,
It is mixed and stirred again. In the above embodiment, the heavy oil 1 sent from the supply fuel tank 10 by the pump 20 is used.
1 is supplied to a mixing stirrer 40, and at the same time, a fine powdery additive 42 and an iron-based material 4
4 are supplied. Fine powder such as carbon black, Ca or Fe having a roughness of 0.2 mm or less is used as the fine powder additive 42, and Fe, F
_{e 2 O 3, F e3 O} 5 or the like is used.

In the mixing stirrer 40, fine powder of the iron-based material is produced by the collision and friction between the iron-based materials due to rotation, and the additive 42 and the heavy oil 11 are uniformly mixed.

The mixture leaving the mixing stirrer 40 , that is, the heavy oil 41 after the property modification , is led to a coarse particle classifier 50,
Removal of coarse particles 51 of a predetermined size of 0.2 mm or more is performed. The coarse particles 51 are returned to the mixing stirrer 40 again by an appropriate feeding means . No coarse 51 from coarse classifier 5 0
The reformed heavy oil 52 whose additive particle size has been adjusted is fed into the boiler 30 as fuel.

In the modified heavy oil 52 into which the fine powder additive 42 and the fine powder of the iron-based material are mixed, the residual carbon is changed from the “flow structure” to the “mosaic structure” with the fine powder additive 42 as a core. , The combustion speed is high, and the fine powder of the iron-based material becomes a combustion catalyst in a high-temperature combustion product, and promotes the "mosaic structure" of residual carbon and the combustion of heavy oil. Therefore, the reformed heavy oil 52 can be efficiently burned in the boiler 30 with a small amount of unburned dust.

Further, coarse particles 51 of an iron-based material are separated from the reformed heavy oil 52, so that the coarse-grained iron-based material is not brought into the boiler 30 and combustion without damaging a burner or the like. Is possible.

[0018]

As described above, according to the present invention ,
Add fine powdered additives and iron-based materials to heavy oil and mix and stir
The coarse particles in the mixture are separated and returned by a coarse classifier.
Mixed and stirred again, causing collisions and friction of ferrous materials.
The mixing state of the fine powdered additive and heavy oil can be
In addition, fine powder of iron-based material generated by wear of iron-based material
The particle size can be adjusted to mix evenly into heavy oil
Heavy oil modified by the apparatus of the present invention
Fuel, residual carbon by pulverulent additive is a "mosaic structure", and is mixed fine powder of iron-based material as a combustion catalyst becomes less occurrence of unburned soot with can be efficiently burned .

[Brief description of the drawings]

FIG. 1 is a system diagram of one embodiment of the present invention.

FIG. 2 is a system diagram of a conventional combustion device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Fuel tank 11 Heavy oil 20 Pump 30 Boiler 40 Mixing stirrer 42 Fine powder additive 44 Iron-based material 50 Coarse classifier 51 Coarse particle 52 Modified heavy oil

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) C10L 1/12 C10L 10/06

Claims (1)

(57) [Claims] 1. A fine powder additive and an iron-based material are added to heavy oil, mixed and stirred to wear the iron-based material, and a fine powder of the same iron-based material and the fine powdered additive are added. a mixing agitator Ru is mixed into the heavy oil is withdrawn from the mixing stirrer
A coarse particle classifier for separating coarse particles from the mixed mixture.
The coarse particles separated by the particle classifier are returned to the mixing stirrer.
Modifying instrumentation of heavy oil fuel, characterized by comprising configured
Place .