KR100761065B1 - Composition of additive for fuel - Google Patents

Abstract

A composition for an additive for a fuel, which improves the combustion efficiency of the fuel and can supply coal suitable for a large combustion engine more easily by improving fine powder(milling) efficiency in the pre-treatment process in the case wherein the composition is applied to coal, is provided. A composition for an additive for a fuel comprises 100 weight parts of hydrogen peroxide, 5 to 120 weight parts of silicate, 10 to 140 weight parts of borax, 10 to 140 weight parts of sodium hydroxide(or potassium hydroxide), and 15 to 300 weight parts of water. The silicate is at least one selected from the group consisting of alkali silicates comprising Na2O.SiO2 and K2O.SiO2. The composition is contained in the fuel in a content of 0.02 to 0.5 weight part relative to 100 weight parts of at least one fuel selected from the group consisting of a solid fuel, a liquid fuel and a gas fuel. The composition further comprises at least one water-soluble dispersing agent selected from the group consisting of glycerine and triethanolamine. The water-soluble dispersing agent is added to the composition in a content of 0.1 to 100 weight parts relative to 100 weight parts of the composition.

Description

Additive Composition for Fuels {COMPOSITION OF ADDITIVE FOR FUEL}

[Industrial use]

The present invention relates to additive compositions for fuels added to fuels such as coal, oil, and gas, and more particularly, to promote combustion and complete combustion of fuel, and to clinker and fouling in a combustion engine. The present invention relates to an additive composition for fuel, which can prevent the pulverization and, in particular, when applied to coal, improves the pulverization (grinding) efficiency during the pretreatment.

[Prior art]

Conventionally, physical methods are mainly used to remove soot and clinker generated in the furnace, and post-treatment of exhaust gas is mainly used to reduce the generation of air pollutants. In addition, in the past, mainly mechanical systems have been used to improve thermal efficiency. However, there have been many problems depending on the operation of the furnace or the properties of the fuel.

Particularly, in the case of a combustion engine using fossil fuel, by-product fuel, and biomass, sludge such as hard solid material is formed in the combustion engine, thereby increasing fuel consumption and lowering combustion efficiency. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an additive composition for fuel, which is added to fuels such as coal, oil and gas, which induces combustion of fuel and complete combustion, and prevents clinkers and fouling in the combustion engine. Additives for fuels that increase heat transfer and improve the combustion efficiency of fuels, especially when applied to coal, as the efficiency of grinding (grinding) in the pretreatment process is improved, and it is easier to supply coal suitable for large combustion engines. To provide a composition.

In order to achieve the above object, the present invention

For fuels containing 5 to 120 parts by weight of silicate, 10 to 140 parts by weight of borax, 10 to 140 parts by weight of sodium hydroxide (or potassium hydroxide) and 15 to 300 parts by weight of water, based on 100 parts by weight of hydrogen peroxide. It provides an additive composition.

According to the present invention, the additive composition for fuel is preferably added in an amount of 0.02 to 0.5 parts by weight based on 100 parts by weight of fuel.

In addition, the composition further comprises a water-soluble dispersant, the content is preferably 0.1 to 100 parts by weight based on 100 parts by weight of the composition.

The present invention also provides the use of the additive composition for fuel prepared above.

Hereinafter, the present invention will be described in more detail.

The additive composition for fuel according to the present invention includes hydrogen peroxide, silicate, borax, and sodium hydroxide (or potassium hydroxide) in a certain amount of water to induce combustion and complete combustion of the fuel, and clinker and fouling in the combustion engine. (fouling) to increase the heat transfer, especially when applied to coal has the advantage of improving the combustion efficiency by improving the grinding efficiency during the pretreatment process.

The hydrogen peroxide releases generator oxygen (radical oxygen) to promote combustion of the fuel. Generator oxygen is oxygen that is very unstable and exists for a very short time. It is also unstable chemically and is highly reactive. In the composition of the present invention, hydrogen peroxide generates generator oxygen, thereby promoting combustion of fuel flowing into the furnace and combustion engine, and easily burning fuel even when the amount of oxygen is low. In addition, in the case of a combustion engine, generation of NO _x (thermal NO _x ), SO _x , CO, etc. is reduced due to generator oxygen, and generation of particulate matters such as dust and unburned dust is suppressed.

Since hydrogen peroxide generates generator oxygen or oxygen molecules even at room temperature, silicate is used to suppress generator oxygen production at low temperatures. As a result, a large amount of radicals are produced at a constant temperature of about 400 ° C. to increase the oxygen-contacting ability during combustion, thereby obtaining a combustion promoting effect, and above about 800 ° C., it is possible to promote combustion promotion due to the radical oxygen of borax. have.

The silicate may be selected from the group consisting of alkali silicates including Na ₂ O · SiO ₂ , K ₂ O · SiO ₂ , and preferably water glass. Can be.

Moreover, the use of the silicate causes the decomposition of the hydrogen peroxide to be delayed even when heated to about 180 ° C as well as room temperature. When the temperature is about 180 ° C. or higher, the generator oxygen is released little by little, and a large amount is emitted at about 400 ° C. or higher to promote combustion of the fuel, and the fuel (carbon) can be burned quickly to promote combustion even in the presence of a small amount of oxygen. . In addition, the silicate prevents low temperature corrosion and increases the dispersibility of the material in the aqueous solution, thereby increasing the specific gravity difference of the material as well as increasing the melting point of the ash.

The borax is sodium tetraborate decahydrate (Na ₂ B ₄ O ₇ · 10H ₂ O) to remove the soot and clinker in the combustion engine to increase thermal conductivity, thereby improving corrosion on the surface of the combustion engine. Prevents and extends the life of the combustion engine.

As the composition of the present invention is mixed with a fuel such as petroleum or coal, a part of the borax is decomposed to release radical oxygen, and the undecomposed borax is deposited on the surface of the furnace and ancillary equipment to form a film to form a high temperature. Suppress corrosion from In addition, the borax reduces the viscosity of the ash (ash) to suppress the formation and adhesion of particulate matter such as chute, clinker and sludge to improve the thermal efficiency, furthermore to remove air pollutants (dust, smoke, NO _x and SO _x ) Reduce.

That is, in the case of a combustion engine, thermal NO _x is reduced due to the radical oxygen of the additive composition for fuel of the present invention, and sodium (Na) mixed in the mixture forms a forget-me-not and is released to the bottom to the atmosphere. Suppresses the generation of SO _x .

The borax may be added by dissolving it in water as a powder, but precipitation may occur over time, so that the temperature of the water is maintained at 50 to 95 ° C. to increase the solubility of the borax in water and to prevent precipitation during dispersion. Sodium hydroxide (or potassium hydroxide) and silicates are used for this purpose.

The additive composition for fuel as described above is based on 100 parts by weight of hydrogen peroxide, 5 to 120 parts by weight of silicate, 10 to 140 parts by weight of borax, 10 to 140 parts by weight of sodium hydroxide (or potassium hydroxide) and water It can be produced by uniformly dispersing 15 to 300 parts by weight.

At this time, if the content of each composition is out of the above range, the combustion is delayed to increase the amount of fuel used or the clinker and fouling suppression force is lowered, there is a problem such as precipitation occurs during dispersion is not preferable.

In addition, the composition may further include a water-soluble dispersant commonly used in the art in order to be uniformly dispersed in water, it is preferable to use glycerin or triethanolamine. At this time, the content of the water-soluble dispersant may be used within the range showing the effect of improving the uniformity of the dispersion and in the range not affecting the physical properties of the composition, preferably added in an amount of 0.1 to 100 parts by weight based on 100 parts by weight of the composition. have.

In addition, the additive composition for fuel according to the present invention can appropriately adjust the composition ratio according to the type and quality of the fuel used, the operating conditions of the combustion engine and the degree of aging, preferably 0.02 to 0.5 weight based on 100 parts by weight of fuel Is added in portions.

Such a method for producing the additive composition for fuel of the present invention is not particularly limited and can be prepared by conventional mixing.

However, by adding borax at 50 to 95 ℃ can maximize the solubility of the borax in water, it is possible to appropriately control the content of radical oxygen generated by adding hydrogen peroxide to the last process. In this case, when hydrogen peroxide is mixed with borax and sodium hydroxide at the same time, bubbles may be generated due to generation of excessive radical oxygen, but radical oxygen may be lost, but the mixing order is not limited thereto.

The fuel usable with the composition of the present invention is not particularly limited, but solid fuels, liquid fuels and gaseous fuels can be used. For example, solid fuels include coal, coke and charcoal. Liquid fuels include gasoline, kerosene, diesel, heavy oil, coal tar, oil sand, oil shale, methanol and ethanol, and gaseous fuels include natural gas, Liquefied petroleum gas, hydrogen and acetylene.

The additive composition for fuel of the present invention burns carbon grains (coal, etc.) before ashes of the fuel are melted, thereby simultaneously preventing carbon grains and ash from being entangled, and forming a film of borax and viscosity of ash. It is possible to prevent the clinker, chute, sludge and the like from sticking in the furnace and to prevent fouling.

The ability to inhibit the formation of the clinker is lowered in the melting point in the reducing atmosphere in the furnace. The additive composition for fuel of the present invention suppresses the melting point drop due to radical oxygen in the reducing atmosphere. In addition, when borax penetrated into the pores of coal is heated, it prevents the ashes from adhering to each other when molten ashes are melted by the glass bead reaction of borax. Forming to suppress high temperature corrosion and suppress the attachment of clinker to improve the thermal efficiency.

In particular, the additive composition for fuel of the present invention is dispersed by water to improve the degree of pulverized coal and the like, and also promote the combustion by the generator oxygen of the fuel additive composition can reduce the amount of ash and increase the recycling value of coal ash. . In addition, when the composition is sprinkled or mixed with coal, briquettes (such as ball coal), coke or charcoal biomass, the combustion efficiency may be increased and smoke and sulfur odors may be reduced.

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the following examples are only examples of the present invention, and the present invention is not limited to these examples, and those skilled in the art can claim It will be understood that various modifications and changes can be made in the present invention without departing from the spirit and scope of the invention as set forth in the following.

Example  One

To prepare an additive composition for fuel, 15 kg of borax and 20 kg of sodium hydroxide were dissolved at 70 ° C in 50 kg of water, followed by addition of 20 kg of silicate (water glass) and 20 kg of hydrogen peroxide. The prepared additive composition for fuel does not occur, such as precipitation or precipitation of borax over time, to prepare a stable aqueous solution.

Comparative example  One

Except that the temperature was carried out at 40 ℃ was carried out in the same manner as in Example 1 to prepare an additive composition for fuel. The prepared composition was confirmed that the precipitate occurs on the bottom over time.

Example  2: evaluation of coal crushing efficiency

The pulverization efficiency in the fine grinding was evaluated by spraying the lump coal passing through the coal feeder in the weight ratio of additive composition (Example 1): water: coal = 1: 10: 1000. At this time, the components, physical properties and operating conditions of the pulverized coal used were shown in Tables 1 and 2 below, and the evaluation results are shown in Table 3 below.

<Components and Physical Properties of Coal Coal Used> division shame division shame  Carbon content 57.36%  Dry ash content 32.90%  Hydrogen content 2.77%  Dry sulfur content 0.37%  Oxygen content 4.86%  Dry volatile content 11.66%  Nitrogen content 0.94%  Ashless dry volatiles content 17.68%  Starch content 4.20%  Calorific value 5260 kcal / kg  Dry moisture content 1.17%  Grinding degree (HGI) 145

<Operation condition of the differentiator> division shame   Coal Charge 100 r / min   Differential Output 198 kg / h   Ventilation 1475 ㎥ / h   Differential Inlet Temperature 258 ℃   Differential internal temperature 358 ℃   Differential outlet temperature 135 ℃   Differential Pressure 1183 Pa   Derivative speed 33 r / min   Differential Drying Fan Speed 8 r / min

Comparative example  2

Except that the composition was not sprayed on the lump coal passing through the coal injector was evaluated the grinding efficiency in the same manner as in Example 2, the results are shown in Table 3 below.

division Example 2 Comparative Example 2 R ₉₀ excess particle distribution (90 mesh residue,%) 9.90% 11.72% R ₂₀₀ excess particle distribution (200 mesh residue,%) 0.66% 1.12%   Particle Uniformity (100% Mesh Passage) 0.971 0.962

As shown in Table 3 above, in the case of using the additive composition for fuel of the present invention (Example 2), the R ₉₀ excess particle distribution rate was reduced by 15.53%, and R ₂₀₀ excess particle distribution rate was compared with that otherwise (Comparative Example 2). This decrease was 41.07%, and as the particle uniformity improved, it was found that coal having a particle size suitable for a large combustion engine could be more easily provided.

Example  3

In Example 2, the fine coal was burned through the burner under the condition of excess air factor = 3.5, and the degree of air pollutant generation, fuel saving effect, clinker and fouling inhibition effect were evaluated. At this time, the burner has a size (m 3) = (width × width × height) = (1.62 × 1.86 × 5.22), 200 kg / hr (1,328,600 kcal / hr) combustion capacity per hour, 84,624 kcal / hr A temperature of 1,249 ° C. and an exhaust gas temperature of 150 ° C. was used, and the results are shown in Table 4 below.

* Air pollutant generation: Measure the concentrations of SO _x (sedimentation titration), NO _x (zinc naphthyldiamine method), CO (non-dispersive infrared spectrometry) and dust (cylindrical filter) for exhaust gases, respectively.

* Fuel savings: evaluated as unburned content (%) in ash

* Clinker and fouling inhibitory effect: visually assessed by attaching a specimen inside the burner

Example  4

Except for burning the fine coal in Example 2 under the condition of excess air factor = 1.3 through the burner in the same manner as in Example 3, the degree of air pollutant generation, fuel savings, clinker and fouling The ring inhibitory effect was evaluated and the results are shown in Table 4 below.

Comparative example  3

Except for burning the fine coal in Comparative Example 2 under the condition of excess air factor = 3.5 through the burner in the same manner as in Example 3 the degree of air pollutant generation, fuel savings, clinker and fouling The ring inhibitory effect was evaluated and the results are shown in Table 4 below.

Comparative example  4

Except for burning the fine coal in Comparative Example 2 under the condition of excess air factor = 1.3 through the burner in the same manner as in Example 3, the degree of air pollutant generation, fuel savings, clinker and fouling The ring inhibitory effect was evaluated and the results are shown in Table 4 below.

division Example 3 Comparative Example 3 Example 4 Comparative Example 4   SOx (ppm) 211 320 173 261   NOx (ppm) 602.6 858.7 612.8 824.6   CO (ppm) 12.23 27.12 11.74 27.36   Dust (mg / ㎥) 5 13 12 35   Unburned Content in Ash (%) 15.30 28.70 19.52 32.72   Whether clinker and fouling occur × × ○ ○

As shown in Table 4 above, when the additive composition for fuel of the present invention was used (Example 3), the air pollutant reduction rate was SO _x (34.06%), and NO _x , respectively, compared to the case where it was not (Comparative Example 3). (29.82%), CO (54.90%) and dust (61.54%), with a 46.69% improvement in fuel savings (reduced unburned content in ash) and an excellent effect of suppressing the occurrence of clinker and fouling Indicated.

As described above, the fuel additive composition of the present invention includes hydrogen peroxide, silicate, borax, and sodium hydroxide (or potassium hydroxide) in a predetermined amount of water to induce combustion and complete combustion of the fuel, and the clinker in the combustion engine Increases heat transfer by preventing clinkers and fouling, and especially when applied to coal, improves the combustion efficiency of the fuel as it improves the efficiency of grinding (grinding) in the pretreatment process and is suitable for large combustion engines. There is an advantage that can be supplied more easily.

Claims (6)

For fuels containing 5 to 120 parts by weight of silicate, 10 to 140 parts by weight of borax, 10 to 140 parts by weight of sodium hydroxide (or potassium hydroxide) and 15 to 300 parts by weight of water, based on 100 parts by weight of hydrogen peroxide. Additive composition. The method of claim 1, The silicate is selected from the group consisting of alkali silicate containing Na ₂ O.SiO ₂ , K ₂ O.SiO ₂ Fuel additive composition for fuel. The method of claim 1, The composition is an additive composition for fuel that is contained in an amount of 0.02 to 0.5 parts by weight based on 100 parts by weight of the fuel selected from the group consisting of solid fuel, liquid fuel and gaseous fuel. The method of claim 1, The composition is a fuel additive composition further comprises a water-soluble dispersant selected from the group consisting of glycerin and triethanolamine. The method of claim 4, wherein The additive amount of the water-soluble dispersant is added to 0.1 to 100 parts by weight based on 100 parts by weight of the composition. The method of claim 1, The composition is a fuel additive composition is prepared by mixing at 50 to 95 ℃.