KR100485193B1 - Combusting composition of accelerator for scale environmental contaminant reduction/prohibition - Google Patents

Abstract

To provide a next generation combustion accelerating preparation capable of being applied to combustion of mineral oil and coal, preventing accumulation of scale or impurities on the inner surface of the combustion furnace, reducing quantity of soot and smoke generated and minimizing an amount of environment pollutants discharged. A combustion accelerant for prevention of scale and clinker is characterized in that it is prepared by mixing 100 to 300 weight parts of water with 100 weight parts of a composition containing 20 to 45 weight parts of borax, 10 to 25 weight parts of hydrogen peroxide, 20 to 40 weight parts of triethanolamine, 5 to 15 weight parts of zinc oxide(ZnO) and 1 to 8 weight parts of manganese dioxide. A method for preparing the combustion accelerant comprises: a step of heating hydrogen peroxide to 60 deg.C by indirectly heating hydrogen peroxide while agitating hydrogen peroxide after injecting hydrogen peroxide into a container; a step of dissolving borax into water by mixing borax with water and heating a mixture thereof; a step of injecting hydrogen peroxide into the container containing the borax dissolved into water, thereby completing a semi-finished product, and cooling temperature of the inside of the container; a step of injecting zinc oxide and manganese dioxide into the container through an injection pipe, and aging the container; and a step of slowly injecting triethanolamine heated to a temperature of 60 deg.C into the aged container.

Description

Combustion Composition for Accelerator for Scale Environmental Contaminant Reduction / Prohibition

Promote combustion in combustion furnaces or boilers that burn coal or mineral oil, and improve the combustion efficiency by reducing the disadvantages of poor thermal efficiency due to the formation of scales such as chutes and sludges that are fixed by incomplete combustion of the surface of the furnace. Various means have been studied.

For example, in the case of mineral oil, a technique is known in which a mixture of a metal salt of a fatty acid or a fatty acid-containing surfactant and an organic solvent is added to a combustion introduction pipe of mineral oil to increase combustion efficiency. However, the above technique was able to increase the combustion efficiency, the scale is deposited on the inner surface of the combustion furnace due to the impurities, there is a disadvantage that the combustion efficiency is also lowered for long-term use.

In addition, Korean Patent Publication No. 132 is a soot remover consisting of a composition of a mixture of borax, sodium chloride and iron oxide is known, a technique that has the effect of reducing the generation of soot and inhibiting deposits inside the combustion furnace is known. However, in the above patent, chlorine is generated, and there are still metal corrosion and environmental pollution inside, and its combustion efficiency, generation of scale, and generation of clink have not the desired performance.

In addition, Korean Patent Publication No. 2004-22797 discloses a remover that removes substances such as glycerin, amine-based stabilizer, hydrogen peroxide, sodium hydroxide and borax, chute, dust, crink and sludge, but is highly corrosive sodium hydroxide. And the use of amine-based stabilizers, it is still difficult to sufficiently suppress the lifetime of the furnace and the generation of nitrogen oxides generated during combustion, in particular, it is still limited to reduce the generation of scale or clink generated on the inner wall of the furnace There is.

The present invention improves the above-mentioned disadvantages, and is applicable to the combustion of mineral oil or coals, and has the next-generation effect of reducing the scale of the inner surface of the combustion or the accumulation of impurities, reducing the amount of smoke generated, and minimizing the discharge of environmental pollutants. It is to provide a combustion promoting agent.

The present invention provides a combustion accelerator that promotes combustion under any conditions in various types of combustion furnaces using mineral oil such as coal, heavy oil, kerosene or light oil to increase energy efficiency.

It is still another object of the present invention to provide a combustion accelerator which suppresses generation of scale or clink caused by incomplete combustion in a combustion furnace.

Still another object of the present invention is to provide a combustion accelerator which can stabilize the dissolution and dispersion of the composition of the combustion accelerator according to the present invention by using a water-soluble polyvinyl alcohol.

Still another object of the present invention is to provide a combustion accelerator which minimizes generation of SOx, which is a sulfur oxide, and NOx, which is a nitrogen oxide, generated during combustion.

The composition of the present invention for achieving the above object is borax 20 to 45 parts by weight, hydrogen peroxide 10 to 25 parts by weight, triethanolamine 20 to 40 parts by weight, zinc oxide (ZnO) 5 to 15 parts by weight, and manganese dioxide 1 to 8 It is characterized by consisting of 100 to 300 parts by weight of water to 100 parts by weight of the composition containing parts by weight.

In the present invention, hydrogen peroxide and borax (Na ₂ B ₄ O ₇ 10H ₂ O) of the components are decomposed as the combustion temperature is increased to release oxygen to make the combustion is better to help completely burn the incompletely burned organic matter Gives. In addition, as described above, the scale attached to the inner surface of the furnace by generating oxygen at a high temperature is secondly burned, and the scale adhered to the inner surface of the furnace becomes porous like pumice, and the scale generated by being easily broken by slight impact or flame is also natural. Removal is easy. When the combustion temperature rises above 900 ℃, the zinc oxide is dissolved and gradually evaporated to adhere to the inner wall of the combustion furnace, or penetrate into the generated scale to weaken the adhesion to the inner wall of the scale. In addition, it prevents the various scales of newly adhered impurities from adhering to the wall surface, suppresses the generation of scale and clink in the combustion furnace, thereby making the thermal conductivity of the combustion furnace more efficient, and increasing the combustion efficiency. Has In addition, manganese dioxide acts as a catalyst to increase the combustion efficiency, thereby increasing the combustion efficiency, and as a whole, increases the combustion efficiency of the fuel in the boiler or the furnace to generate chute, soot and sludge and clinker in the furnace. Minimize.

In another embodiment of the present invention, 1 to 5 parts by weight of water-soluble polyvinyl alcohol, 20 to 45 parts by weight of borax, 10 to 25 parts by weight of hydrogen peroxide, 20 to 40 parts by weight of triethanolamine, and 5 to 15 parts by weight of zinc oxide (ZnO) And 100 to 300 parts by weight of water to 100 parts by weight of the composition containing 1 to 8 parts by weight of manganese dioxide.

Another embodiment of the present invention is 0.1 to 3 parts by weight of anionic surfactant, 1 to 5 parts by weight of water-soluble polyvinyl alcohol, 20 to 45 parts by weight of borax, 10 to 25 parts by weight of hydrogen peroxide, 20 to 40 parts by weight of triethanolamine, oxidation 5 to 15 parts by weight of zinc (ZnO), and 100 to 300 parts by weight of water are mixed to 100 parts by weight of the composition containing 1 to 8 parts by weight of manganese dioxide.

The water-soluble polyvinyl alcohol in the above components is water-soluble, and any polyvinyl alcohol having a normal molecular weight is not limited in the present invention, but a number average molecular weight of 10,000 or less is used. If more than 10,000 is used, it is difficult to dissolve in water in a short time and the viscosity is not easy to supply the final product smoothly. Water-soluble polyvinyl alcohol is required to increase the solubility of borax as a component of the present invention and to stabilize hydrogen peroxide.

Among the components of the present invention, the surfactant is well dispersed by using a conventional surfactant, and also serves to prevent the phenomena caused by the composition component sinking after preparation. In particular, anionic surfactants are decomposed in the combustion furnace to react with sulfides produced by the combustion of coal or mineral oil to form metal sulfates, thereby preventing the formation of sulfuric acid in the furnace to inhibit corrosion of the surface. It extends the life of the furnace and, in the case of using coal fuel, reacts with ash formed on the surface by burning coal to form metal oxide salts. Thus, the surface of the fuel is always in contact with the heat source to promote combustion and to increase combustion efficiency. The anionic surfactant can be any type as long as it is used in the form of an organometallic salt such as a metal carboxylate salt or a sulfonate metal salt.Also, as the metal ion component, an alkali organometallic salt such as sodium or potassium, an alkali metal such as calcium or magnesium Organometallic salts are mainly used.

In the combustion accelerator composition according to the present invention, it is preferable to use 0.05 wt% to 1 wt% with respect to the total weight of the fuel. If it is less than this, there is a sufficient increase in combustion efficiency and the effect of removing deposits and preventing deposits in the furnace, and if it is more than this, the economy is poor, and the amount of sludge in itself tends to increase.

In addition, the zinc oxide and manganese dioxide used in the present invention have a particle size of 300 mesh or less is good in the dispersing and spraying of the final combustion accelerator, and the precipitate is not rapidly formed in the produced water medium and dispersed for a certain period of time. It can exist in a state.

In addition, the present invention may further include 1 to 5 parts by weight of porous aluminum oxide, at least one powder selected from potassium carbonate, magnesium oxide, silica, calcium carbonate, and the composition, as needed, By holding the soot inside of the porous can be given a flame-retardant effect to minimize the generation of soot, such as soot. In addition, by using such a porous metal oxide, it was possible to further reduce the SOx and NOx. The metal oxide may be a general grade commonly used on the market. Typically, 100 mesh or more is used, and more preferably, metal oxide having particles of 300 mesh or more is preferably used.

In the case of coals, the composition of the present invention is injected and injected at an appropriate pressure using conventional means such as spraying on a conveyor belt in which coal is transported to a combustion furnace in the case of coals.

Typically, in the combustion of solid fuel such as coal, 0.5 to 2 kg of the composition is sprayed per ton of solid fuel. In addition, when the liquid fuel is combusted, a high pressure spray is carried out inside the combustion furnace by means of a spray or the like to inject 1 to 5 kg per ton to have a predetermined effect.

Hereinafter, the production method of the combustion promoter of the present invention was examined in more detail through Examples, and the results were evaluated.

Preparation Example 1

300 kg of hydrogen peroxide is added to a 500L container, indirectly heated while stirring, and the temperature is raised to 60 ° C and stored separately.

Next, 600 kg of borax and 5000 kg of water were mixed and dissolved by heating up to 70 ° C., after the dissolution reaction was completed, the hydrogen peroxide mixed solution was added to the water solution to complete the semi-finished product, and the internal temperature was lowered to 35 ° C.

150 kg of zinc oxide and 90 kg of manganese dioxide were introduced through an injection pipe while injecting air generated from an oxygen generator into the vessel, followed by aging, and slowly adding 500 kg of triethanolamine heated to 60 ° C. into the solution. Completed.

The composition of the present invention is precipitated when left for a long time, it is intermittently bubbled with stirring or air. Preferably bubbling 10 seconds to 1 minute per 30 minutes.

Preparation Example 2

50 kg of calcium carbonate and 300 kg of hydrogen peroxide are added to a 500L container, indirectly heated with stirring, and stored at 60 ° C.

Next, 600 kg of borax and 5000 kg of water dissolved in 60 kg of polyvinyl alcohol having a molecular weight of 1200% saponification degree 92% were mixed and dissolved by heating to 70 ° C. After the dissolution reaction was completed, the mixed solution of calcium carbonate and hydrogen peroxide was added to the water. It was added to the solution to complete the semi-finished product, and the internal temperature was lowered to 35 ℃.

150 kg of zinc oxide and 90 kg of manganese dioxide were introduced through the injection pipe while injecting the air generated from the oxygen generator into the vessel, followed by aging, and slowly adding 500 kg of triethanolamine heated to 60 ° C. into the solution. Completed.

The composition of the present invention is precipitated when left for a long time, it is intermittently bubbled with stirring or air. Preferably bubbling 10 seconds to 1 minute per 30 minutes.

Preparation Example 3

50 kg of calcium carbonate and 300 kg of hydrogen peroxide are added to a 500L container, indirectly heated with stirring, and stored at 60 ° C.

Next, 600 kg of borax and 60 kg of polyvinyl alcohol having a molecular weight of 1200% saponification degree and 5000 kg of water dissolved in 30 kg of sodium stearate are mixed and dissolved by heating to 70 ° C., after the dissolution reaction is completed, the calcium carbonate and hydrogen peroxide The mixed solution was added to the water solution to complete the semifinished product, and the internal temperature was lowered to 35 ° C.

150 kg of zinc oxide and 90 kg of manganese dioxide were introduced through the injection pipe while injecting the air generated from the oxygen generator into the vessel, followed by aging, and slowly adding 500 kg of triethanolamine heated to 60 ° C. into the solution. Completed.

The composition of the present invention is precipitated when left for a long time, it is intermittently bubbled with stirring or air. Preferably bubbling 10 seconds to 1 minute per 30 minutes.

Example 1

In the combustion furnace using coal as fuel, the composition prepared in Preparation Examples 1 to 3 was continuously sprayed through a spray nozzle on a conveyor belt of coal introduced into the combustion furnace in an amount of 2 kg per ton of coal fuel.

As a result, carbon monoxide was reduced by 57%, 31% of sulfur oxides (SOx), and 12% of nitrogen oxides (NOx) at the combustion outlet compared with the case where the composition was not sprayed. . In addition, soot, fly ash and dust generated in the air were reduced by an average of 68%.

After one month of continuous use of the composition, it was confirmed that the amount of scale inside the furnace was reduced by an average of 85% or more than the amount not used. In addition, it was confirmed that the amount of flame discharged from the combustion furnace was also greatly reduced to emit transparent smoke. In terms of combustion efficiency, the average efficiency was 5.5%. In addition, in the case of the combustion accelerator prepared in Preparation Example 3 it can be seen that the combustion efficiency is increased by more than 7%, it was found that the combustion efficiency according to the anionic surfactant is further improved.

Example 2

The compositions of Preparation Examples 1 to 3 were intermittently sprayed into the combustion furnace through spray nozzles in an amount of 1 kg per ton of midstream in the combustion furnace using heavy oil as fuel.

As a result, carbon monoxide at the combusted outlet is reduced by 55% on average, sulfur oxides (SOx) by more than 31% and nitrogen oxides (NOx) by 13% on average compared to the case where the composition is not sprayed. Indicated. In addition, soot, fly ash and dust generated in the air were reduced by an average of 81%.

It was confirmed that the amount of generation of the scale inside the combustion furnace was reduced by 78% in comparison with the case where the composition was not used for one month of continuous use. In addition, it was confirmed that the amount of flame discharged from the combustion furnace was also greatly reduced, and the combustion efficiency was also increased on average by 5%.

As described above, the combustion-promoting composition according to the present invention can increase the combustion efficiency, and thus, in the case of heavy oil and coal, the combustion efficiency is increased, thereby reducing fuel consumption.

In addition, the amount of fly ash, such as carbon monoxide, sulfur oxides, nitrogen oxides and dust, has been greatly reduced, making it possible to use environmentally friendly combustion furnaces.

In addition, the corrosion of the inner surface of the combustion furnace was prevented, and the effect of removing various scales generated in the combustion furnace also showed an excellent effect, and it was confirmed that the amount of flame discharged was also greatly reduced.

Claims (9)

delete Water 100 to 100 parts by weight of a composition containing 20 to 45 parts by weight of borax, 10 to 25 parts by weight of hydrogen peroxide, 20 to 40 parts by weight of triethanolamine, 5 to 15 parts by weight of zinc oxide (ZnO), and 1 to 8 parts by weight of manganese dioxide. Combustion accelerator to prevent clink and scale composed by mixing 300 parts by weight. The method of claim 2, A burn accelerator for preventing cranks and scales that increase the dissolution and dispersing effect of the composition by further using 0.1 to 3 parts by weight of anionic surfactant in the composition. delete The method of claim 2, 1 to 5 parts by weight of a water-soluble polyvinyl alcohol and at least one powder selected from porous aluminum oxide, magnesium oxide, silica, calcium carbonate and potassium carbonate, further comprising 1 to 5 parts by weight of the composition. A combustion promoter for preventing cranks and scales. The method according to any one of claims 2 to 5, Combustion accelerators for preventing cranks and scales, characterized in that used in an amount of 0.05 to 1% by weight based on coal or heavy oil. delete 1) adding hydrogen peroxide to the vessel and indirect heating while stirring to heat up to 60 ℃; 2) mixing borax in water and dissolving by raising the temperature; 3) adding hydrogen peroxide to the vessel in which borax is dissolved to complete the semi-finished product and to cool the internal temperature; 4) introducing zinc oxide and manganese dioxide into the container through an injection pipe, and then aging; 5) A method of producing a combustion accelerator according to claim 2, comprising the step of slowly adding triethanolamine heated to 60 ° C into the container. The method of claim 8, In the step of dissolving borax in water by heating and dissolving, the method of producing a combustion accelerator, characterized in that before the step of dissolving a surfactant and water-soluble polyvinyl alcohol in the water.