KR20060081654A - Anti-scaling, chute, clinker and sludge removal and flame control compositions in combustion engines - Google Patents

Abstract

Including hydrogen peroxide, amine stabilizers, borax and sodium hydroxide, it is added to fuels such as coal, oil and gas to promote combustion and remove heat in the engine to increase heat transfer to improve heat efficiency, Disclosed is an additive composition for fuels that reduces emissions of harmful exhaust gases such as, SOx, NOx, and CO.

Description

COMPOSITION FOR PREVENTING SCALING, EXCLUDING OF SOOT, CLINKER AND SLUDGE, AND CONTROLLING FLAME IN COMBUSTION APPARATUS}

An object of the present invention is to add to the fuel such as coal, oil and gas to promote combustion and to remove impurities such as chute, clinker in the fuel engine to increase the heat transfer, and at the same time adjust the size of the flame to improve the radiant heat transfer system It is to provide an additive composition for fuel that the thermal efficiency is improved by such a method.

(a) Field of the Invention

The present invention includes borax, sodium hydroxide, amine stabilizers, and hydrogen peroxide in water to promote combustion, increase thermal efficiency as well as prevent soot, and in particular, by regulating flames by inspecting the chute and clinker in the furnace and radiating heat. A water-soluble additive additive for improving the delivery system of

(b) Description of the Related Art

Conventionally, the removal of the soot and clinker of the furnace has been physically eliminated, and the reduction of air pollution has been achieved through post-treatment. Improvements in heat radiation have improved thermal efficiency in the past, mainly based on mechanical systems. However, there were many limitations due to the operation of the furnace or the nature of the fuel.

In the case of a gas boiler, sludge, such as a solid material, is formed in the boiler due to whitening, which may increase gas consumption or cause a gas accident.

1 is a graph showing the effect of reducing the exhaust gas over time of the additive composition for fuel according to the present invention.

The present invention provides an additive composition for fuel comprising 8 to 40 parts by weight of hydrogen peroxide, 8 to 40 parts by weight of an amine stabilizer, 10 to 40 parts by weight of borax, 16 to 40 parts by weight of sodium hydroxide and remainder. .

In addition, the composition is prepared in the form of water dispersion by dispersing in water, wherein the content of water to the composition is 1: 2 to 1: 50 by weight ratio.

The fuel additive composition is added in an amount of 0.02 to 0.5 parts by weight based on 100 parts by weight of the fuel.

The composition further comprises methyl alcohol or a surfactant, the content of which is to be a weight ratio of 1: 1 to 1: 3.

The composition further includes one catalyst selected from the group consisting of potassium carbonate, calcium carbonate and sodium carbonate, wherein the content is 1: 0.03 to 1: 0.3 by weight. To be

In addition, the present invention comprises the steps of mixing 16 to 40 parts by weight of sodium hydroxide in an aqueous solution in which 10 to 40 parts by weight of borax is dissolved,

Adding 8 to 40 parts by weight of an amine stabilizer to the obtained mixture,

It provides a method for producing a fuel additive composition prepared by adding 8 to 40 parts by weight of hydrogen peroxide to the obtained mixture.

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

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

The additive composition for fuel of the present invention includes hydrogen peroxide, amine stabilizer, borax and sodium hydroxide in a certain amount of water to promote combustion of fuel and induce complete combustion.

The hydrogen peroxide releases generator oxygen and serves to promote combustion of the fuel. Generator oxygen (radical oxygen) is oxygen that is very unstable and exists in a very short time. It is also unstable as a chemical species and has a very large reaction force. In the composition of the present invention, hydrogen peroxide may generate generator oxygen, thereby promoting combustion of fuel flowing into the furnace and the combustion tube, and easily burning the fuel in a case where the amount of oxygen is low. In addition, in the case of a combustion engine, NOx (thermal NOx) is reduced due to the generator oxygen, and the generation of PM materials such as SOx and CO is suppressed.

Since hydrogen peroxide generates radical oxygen or oxygen molecules even at room temperature, glycerin or an amine stabilizer is used to suppress its production. As a result, by the generation of a large amount of radicals at a constant temperature of about 400 ℃ can increase the oxygen contact ability during combustion to obtain a combustion promoting effect, and at about 800 ℃ or more can promote the combustion promotion due to the radical oxygen of borax.

The amine stabilizer is selected from the group consisting of dimethanol amine, diethanol amine, trimethanol amine and triethanol amine.

Furthermore, by using the amine stabilizer, decomposition is delayed even when heated to about 180 ° C as well as at room temperature. When the temperature reaches about 180 ° C or higher, the generator oxygen is released in large quantities to promote combustion of the fuel and in the presence of a small amount of oxygen. Burn fuel (carbon) quickly to accelerate combustion. In addition, the amine stabilizer prevents low temperature corrosion and increases the dispersibility of the material in the aqueous solution to reduce the specific gravity difference of the material.

The borax is sodium tetraborate decahydrate (Na ₂ B ₄ O ₇ · 10H ₂ O, Borax) to remove the chute, clinker and sludge in the combustion engine and furnace in the combustion state, to increase the conductivity, to prevent corrosion of the surface of the furnace To extend the life of the furnace.

Borax mixed in fuels such as oil and coal is partially decomposed to release radical oxygen, but undecomposed borax is deposited on the surface of the furnace and ancillary equipment to form a film to suppress corrosion at high temperatures. By lowering the viscosity of ash, PM materials such as chutes, clinkers and sludges are removed and adhesion is reduced, thereby improving thermal efficiency and further reducing air pollutants (dust, smoke, NOx and SOx). That is, in the case of a combustion engine, thermal NOx is reduced due to radical oxygen of the additive composition for fuel of the present invention, and a NA is mixed due to the NA mixed in the mixture, which is released to the bottom, thereby suppressing generation of SOx into the atmosphere. do.

The borax is added to dissolve in water as a powder, but a problem occurs such that precipitation occurs over time, so as to increase the solubility of the borax in water, and to prevent precipitation during dispersing, sodium hydroxide and amine-based Use stabilizers.

The additive composition for fuel as described above is prepared by dispersing in water including 8 to 40 parts by weight of hydrogen peroxide, 8 to 40 parts by weight of amine stabilizer 10 to 40 parts by weight of borax and 16 to 40 parts by weight of sodium hydroxide, wherein the composition And water are in a weight ratio of 1: 2 to 1:50.

At this time, if the content of each composition is out of the above range, the combustion is delayed, the use of fuel is increased or the cleaning power is lowered, there is a problem such as precipitation occurs during dispersion, which is not preferable.

The fuel additive composition further mixes potassium carbonate, calcium carbonate or sodium carbonate to improve soot upon combustion. In addition, it is possible to induce low-temperature combustion to suppress NOx, and control the size of the flame during fuel combustion to improve the radiant heat conduction system to induce fuel savings. At this time, the additional composition is weight ratio of 1: 0.03 to 1: 0.3 with respect to the composition of the present invention.

The additive composition for fuel of the present invention can appropriately adjust the composition ratio according to the type and quality of the fuel used and the operation conditions of the furnace, the system and the degree of aging, preferably from 0.02 to 0.5 parts by weight based on 100 parts by weight of the fuel. Add. As a result, the washing ability is increased, and low-temperature corrosion and high-temperature corrosion can be suppressed by the amine stabilizer and borax at about 180 ° C. or more during combustion.

The additive composition for fuel of the present invention comprises the steps of mixing 10 to 40 parts by weight of borax in an aqueous solution of 16 to 40 parts by weight of sodium hydroxide,

Adding 8 to 40 parts by weight of an amine stabilizer to the obtained mixture,

It is prepared through the step of adding 8 to 40 parts by weight of hydrogen peroxide to the obtained mixture.

In particular, the solubility of the borax can be maximized by adding borax at 50-95 ° C., and the content of radical oxygen generated by adding hydrogen peroxide to the last step can be properly controlled. At this time, when hydrogen peroxide is mixed with borax and sodium hydroxide, which are the first stages, bubbles are generated due to excessive radical oxygen, and there is a disadvantage in that radical oxygen is lost. It is accompanied by difficulties and dangers.

At this time, the added potassium carbonate, calcium carbonate and sodium carbonate are carried out after the step of adding hydrogen peroxide.

The fuel that can be used is not particularly limited in the present invention, but solid fuels, liquid fuels and gaseous fuels can be used. For example, the solid fuel may include coal, coke, charcoal, and the like, and the liquid fuel may include gasoline, kerosene, diesel oil, heavy oil, coal tar, oil sand, oil shale, methanol, ethanol, and the like. 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 changing the film forming action of borax and viscosity of ash. It is possible to prevent the clinker, chute and sludge from sticking in the furnace.

In particular, 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, the glass beads reaction of borax prevents the ashes from adhering to each other when the ashes are melted, and the borax that has not been decomposed is deposited on the surface of the furnace and ancillary equipment to form a film. Formation to inhibit high temperature corrosion and suppress the attachment of clinker to improve the thermal efficiency.

In a first example, the additive composition for fuel of the present invention is applied to a gas boiler to suppress the production of sludge and the like, and to obtain an effect of reducing energy.

Specifically, in the case of a gas boiler, sludge such as solid material in the boiler is formed to a thickness of about 1 to 2 mm due to the bleaching phenomenon in which fine dust mixed in the air sucked for combustion is carbonized and solidified. At this time, by using the additive composition for fuel of the present invention, the melting point drop and the ignition temperature can be lowered to remove the generated sludge or to suppress the formation of the sludge. Specifically, the additive composition for fuel of the present invention was dispersed in water at a ratio of 1:40, and then experimented in a boiler of 20 ton / H grade rotary boiler for hot water, which is a gas and oil in an H apartment, and the flame was orange. It was confirmed that the flame is long while changing to light, and thus, an energy reduction rate of about 5% was obtained.

In a second example, when the additive composition for fuel of the present invention is treated with a gas turbine, the dust adhering to the blade of the turbine is removed. The adhered dust causes vibration to occur during high speed rotation of the gas turbine, causing obstacles to high speed operation. By using the additive composition for fuel of the present invention, the dust is effectively removed due to the dust removal and rapid combustion of the dust and chute. Not only can high speed operation be achieved, but the thermal efficiency of about 2% can be improved.

As a third example, the additive composition for fuel of the present invention can be mixed with diesel diesel oil to reduce energy. Specifically, the fuel additive composition is used by adding methyl alcohol or a surfactant to enhance the emulsion mixing effect with the diesel diesel oil. As a result, the amount of dust generated during combustion in the case of diesel can be reduced, and an energy reduction rate of about 9% was obtained.

As a fourth example, the additive composition for fuel of the present invention is dispersed by water to improve the grinding degree (HGI) of fine coal, etc., by about 10%, and the combustion of the additive composition for fuel is accelerated by the generator oxygen to reduce the amount of ash. Reduce 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 and burned, combustion may be enhanced and smoke and sulfur odors may be significantly reduced. In particular, by mixing potassium carbonate and the like in the composition to improve soot, induce low-temperature combustion to control the emission of harmful exhaust gases such as NOx and improve the radiant heat conduction system during gas fuel combustion to induce fuel savings can do.

As a fifth example, the additive composition for fuel of the present invention can increase the combustion rate per unit area of the kiln and further increase the clinker productivity by treating the cement kiln with a single salt. In general, the length of the flame increases the rate of combustion based on the radical oxygen, which induces complete combustion using the additive composition for fuel of the present invention to reduce the length of the flame. In addition, in the case of fine porous coal fuel, the borax's strong permeability penetrates deeply between the pores of the coal and generates radical oxygen when heated above a certain temperature, and the oxygen contact with the melting point lowering function of calcium carbonate and sodium carbonate and the porosity enhancement function. In addition to increasing the area to increase combustion speed and lower the ignition temperature, Ringgelmann turbidity reduced soot to 1 degree at 3 degrees.

As a sixth example, the additive composition for fuel of the present invention can be applied to an oil boiler to induce complete combustion of the fuel, thereby reducing the oil in the fly ash due to incomplete combustion of heavy oil, and to increase the dust collection efficiency of the dust collector and the life of the catalyst. have. Specifically, the composition was dispersed and sprayed into the combustion chamber of the oil boiler to improve fuel saving by about 3%, and to remove the sludge in the boiler to eliminate operational obstacles. In addition, dust and soot could be removed, and the scale and sludge generated in the preheater could be removed.

As such, it is preferably used as a scale inhibitor, a corrosion inhibitor, a chute inhibitor, a clinker remover, a sludge remover, a flame control agent, or the like in a combustion engine comprising the additive composition for fuel according to the present invention.

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. 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 claims.

<Example 1>

To prepare an additive composition for fuel, 30 kg of borax and 20 kg of sodium hydroxide were dissolved at 70 ° C. in 50 kg of water, and then 20 kg of triethylamine, 20 kg of hydrogen peroxide and 10 kg of potassium carbonate were added. 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 1>

An additive composition for fuel was prepared in the same manner as in Example 1, except that sodium hydroxide was not used. The prepared composition was confirmed that the precipitate occurs at the bottom over time.

<Comparative Example 2>

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

<Comparative Example 3>

Except that the temperature was carried out at 45 ℃ was carried out in the same manner as in Example 1 to prepare a fuel additive composition. The prepared composition was also confirmed that the precipitate occurs on the bottom over time as in Comparative Examples 1 and 2.

<Comparative Example 4>

To prepare the additive composition for fuel, 30 kg of borax, 20 kg of sodium hydroxide and 30 kg of hydrogen peroxide were dissolved at 70 ° C in 50 kg of water, and then 20 kg of triethylamine and 10 kg of potassium carbonate were added to prepare the additive composition for fuel. Prepared. In the prepared composition, the temperature in the composition rapidly increased to about 100 ° C. over time, and the result was due to the excessive formation of radical oxygen with the addition of hydrogen peroxide.

<Experimental example 1> Energy efficiency test

An experiment was conducted on energy efficiency using the additive composition of Example 1, wherein the conditions are as follows.

Coal (heating amount: 6977 kcal, melting point (FT): 1588 degrees Celsius) using 1.73% of water, 14.73% of ash, and 30.12% of volatile matter, the 80% of the boiler with the operating pressure of 8 kpa at a medium pressure of 10ton / h As a result of measurement under load, a coal reduction rate of 16.8% was obtained.

<Experimental example 2> Pollution reduction test

Using the additive of the composition described above was measured for items such as dust, sulfur dioxide and ringgelman concentration, the results obtained are shown in Table 1 below.

<Table 1>

<Experiment 3> Fuel saving effect test

By using the additive of the above composition to apply to the cogeneration plant using bituminous coal to find the fuel saving effect through the removal of air pollutants and clinker.

The test method is diluting the prepared additives in water to be about 1000: 1 to the weight of coal, injecting and spraying the coal on the coal feeder to grind the burner to 200 mesh or less in the mill. Burned through.

At this time, 120 ton / h was used as a boiler, and Chinese Daedong coal (calorie 6,600 kcal / kg, melting point 1180 ° C sulfur content of 0.8%) was used as a fuel, and fuel consumption was 300 ton / h and furnace temperature. 1300 ~ 1700 ℃, the burner type is a vertical firing (Horizontal firing) type, the boiler type was used natural circulation (Natuaral Circulation).

A: Air Pollutant Reduction Effect

For four weeks, dust emissions, SOx concentrations, NOx concentrations, and CO concentrations were measured.

1. The dust concentration was measured by the cylindrical filter method. The average concentration of dust was 19.4 mg / sm ² before 4 weeks and decreased by about 47.0%.

2. SOx emission concentration,: measured by precipitation titration method, the reduction effect of about 10.2% was obtained.

3. NOx emission concentration was measured by using zinc naphthyl diamine method, the reduction effect of about 13.0% was obtained.

4. CO emission concentration: Measured using a non-dispersive infrared method, a reduction of about 27% was obtained.

B: fuel efficiency improvement effect

As a result of measuring the content of the fly ash, it was reduced by about 57.8% from 30.8% to 13.0% after treatment before treatment with the fuel additive composition of the present invention.

In addition, the measurement of the bottom ash content, which is a kind of clinker, showed that the content was reduced from 59.0% to 25.% from about 57.6% before and after treatment with the additive composition for fuel of the present invention.

C: Clinker Removal Effect

Although coal having a low melting point of 1180 ° C., which is lower than 1300-1400 ° C. coal, which is generally used in this experiment, was used, no clinker was generated in the furnace wall and the super heater after using the fuel additive composition of the present invention. No fouling occurred.

<Experimental example 4> Fuel saving effect test

In order to find out the removal of clinker in the boiler and the improvement of thermal efficiency using the additive of the above composition, the experiment was carried out as follows.

The test method was to pulverize the coal, and then spray the composition by diluting it in water, where the content ratio of coal: water: composition was 1000: 10: 1, and then sprayed on the lump coal on the coal feeder to 200 mesh in the grinding mill. It was pulverized to below the mesh and burned through the burner.

Coal as a fuel used was about 2.36% moisture, about 27.89% ash, about 17.97% volatile matter, and 200 mesh of call fine powder was used, and the boiler used vertical spray type, and the evaporation amount was 220ton / hr, steam The pressure was 9.8 Mpa, the furnace temperature was 1,500 ° C to 1,700 ° C, the air ratio was about 4.8, the flue exhaust temperature was 120 ° C, and the steam temperature was about 540 ° C.

A: Fuel Savings

As a result of mixing the fuel additive composition according to the present invention with coal for 14 days, it was possible to produce a vapor amount of 76,710 ton when 9,786.54 kg of coal was used.In contrast, as a result of using coal for 15 days, the coal used was 9,910.58 kg and the amount of steam generated was 68.462 ton. These results show that the fuel efficiency can be improved even with a small amount of fuel by using the additive composition for fuel of the present invention.

B: SOx reduction effect

In order to examine the effect of reducing the SOx of the additive composition for fuel according to the present invention, the composition (C1) of Example 1 and the composition (C2) added with 10% by weight of potassium carbonate (10 kg) to the composition Combined with coal at a ratio of 1: 1000 (weight ratio), and the effect of reducing the exhaust gas with time using only coal was examined.

The conditions are as described below and the results obtained are shown in FIG. 1.

Measuring instrument: Test 350M / XL (Maker: TESTO)

Measurement Method: Potential Potential Chemical Method

Type Approval Number of Measuring Equipment: ASGAM-2001-6 (Korea National Institute of Environmental Research)

Performance test report of measuring equipment: Industrial Technology Testing Institute

Referring to Figure 1, # 1 and # 2 shows the amount of SOx emission (-□-,-◇-) when the composition of Example 1 is not added, (-▲-) and when only C1 is added , SOx emission amount when 10 weight% (-◆-) and 15 weight% (-■-) of C2 were added with respect to C1.

Compared with the case where it was not treated with the additive composition for fuel of the present invention, by using potassium carbonate, the fuel exhaust emission amount was reduced from about 1,100 ppm on average to about 600 ppm on average to obtain an SOx reduction effect of about 45%.

C: Reduction of Unburned Dust in Fly Ash

In order to determine the effect of reducing the fine ash of the boiler fly ash using the additive composition for fuel according to the present invention, the fine dust of the boiler of Unit 1 and the untreated Unit 2 boiler was measured for 6 days. It was.

As a result, when the additive composition for fuel of the present invention was used (No. 1), the fine powder was 7.39%, and otherwise (No. 2) was 8.76%, which showed an effect of reducing the fine powder of about 15.64%.

Therefore, by using the additive composition for fuel of the present invention, exhaust gases such as dust, SOx, and NOx are reduced, induction of complete combustion, lowering the amount of fuel such as coal, and the like, such as chute, clinker and sludge in the combustion apparatus. Prevents formation and corrosion to improve heat transfer efficiency and increase work stability.

Claims (20)

An additive composition for fuel comprising 8 to 40 parts by weight of hydrogen peroxide, 8 to 40 parts by weight of an amine stabilizer, 10 to 40 parts by weight of borax, 16 to 40 parts by weight of sodium hydroxide and the balance. The additive composition for fuel according to claim 1, wherein the amine stabilizer is one selected from the group consisting of dimethanol amine, diethanol amine, trimethanol amine, and triethylamine. The additive composition for fuel according to claim 1, wherein the borax is dissolved in an aqueous sodium hydroxide solution. The additive composition for fuel according to claim 1, wherein the composition is prepared in the form of a water dispersion. 5. The additive composition for fuel according to claim 4, wherein the content of the additive composition for fuel and water during water dispersion is 1: 2 to 1:50 by weight. The additive composition for fuel according to claim 1, further comprising one catalyst selected from the group consisting of potassium carbonate, calcium carbonate, and sodium carbonate. 7. The additive composition for fuel according to claim 6, wherein the additive composition for fuel and the catalyst are present in a weight ratio of 1: 0.03 to 1: 0.3. The additive composition for fuel according to claim 1, further comprising methyl alcohol or a surfactant. 9. The additive composition for fuel according to claim 8, wherein the content of the additive composition for fuel and methyl alcohol or surfactant is in a weight ratio of 1: 1 to 1: 3. Mixing 16-40 parts by weight of sodium hydroxide in an aqueous solution in which 10-40 parts by weight of borax is dissolved, Adding 8 to 40 parts by weight of an amine stabilizer to the obtained mixture, A method for producing an additive composition for fuel produced by adding 8 to 40 parts by weight of hydrogen peroxide to the obtained mixture. The method of claim 10, wherein the mixing of the water, borax and sodium hydroxide is carried out at 50 to 95 ℃. An anti-scale agent of a combustion engine comprising the additive composition for fuel of claim 1. A corrosion inhibitor of a combustion engine comprising the additive composition for fuel of claim 1. A chute inhibitor of a combustion engine comprising the additive composition for fuel of claim 1. A clinker remover of a combustion engine comprising the additive composition for fuel of claim 1. A sludge remover of a combustion engine comprising the additive composition for fuel of claim 1. The flame control agent of a combustion engine containing the additive composition for fuel of Claim 1. A fuel composition comprising the additive composition for fuel of claim 1. 19. The fuel composition of claim 18, wherein the additive composition for fuel comprises 0.02 to 0.5 parts by weight based on 100 parts by weight of fuel. 20. The fuel composition of claim 19, wherein the fuel is one selected from the group consisting of solid fuel, liquid fuel and gaseous fuel.

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