KR102018120B1 - Dust and fly ash treatment method and solid fuel made by using the method - Google Patents

Abstract

A method for treating dust and fly ash and a solid fuel manufactured by the method are disclosed. The present invention relates to a method for treating dust and fly ash for treating dust and fly ash so as to prevent environmental pollution due to dust and fly ash. The method comprises a solidification step (S10) of mixing the dust and fly ash and a dust and fly ash treatment solution, wherein a hydration reaction occurs when mixed with water or waste oil. The dust and fly ash treatment solution is any one of water and waste oil, or a combination thereof. Through the solidification step (S10), the blowing of dust and fly ash is prevented to prevent environmental pollution due to dust and fly ash.

Description

Dust and fly ash treatment method and solid fuel made by this method {Dust and fly ash treatment method and solid fuel made by using the method}

The present invention relates to a method for treating dust and fly ash and to solid fuels produced by the method, and more specifically, to a dust and fly ash collected in an incinerator, a thermal power plant, etc., by mixing dust and fly ash, such as water and waste oil, and a fly ash treatment solution. After forming a solid fuel by mixing the heating materials such as sewage sludge, petrochemical sludge, and finely divided fine powder, solid waste fuel with high calorific value while treating waste sludge together with dust and fly ash which are environmental pollution factors It relates to a method for treating dust and fly ash to be produced and solid fuels produced by the method.

    In general, dust and fly ash collected in dust collectors of various industrial sites such as incinerators, thermal power plants, and mills are classified as designated wastes and landfilled. The amount of landfill increases year by year, not only is it expensive to handle, but also illegal ocean dumping causes serious environmental pollution problems.

    In particular, soil pollution due to heavy metals is also serious because there is a shortage of landfills compared to the amount of dust and fly ash to be treated.

On the other hand, in general, a large number of industrial fields, such as food manufacturing, agriculture, and livestock, as well as wastewater treatment of purified water and sewage, and waste treatment inevitably

Sludge is generated.

In general, sludge is finally disposed of by stabilizing by anaerobic treatment and then landfilling through dehydration, or by dehydrating the sludge mechanically and drying if necessary, followed by incineration.

However, in order to evaporate the water of the sludge by introducing a drying process for efficient incineration of the sludge, due to the water distribution of the dehydrated sludge cake and the physical characteristics, most of the drying process removes only the water from the sludge surface. Is not removed at all and often causes a bad odor. Subsequent incineration requires auxiliary fuel and consumes much more energy.

Therefore, there is an urgent need for the development of effective methods to treat dust and fly ash and sludge that do not landfill, which are sources of pollution in industrial sites.

Korean Patent Publication No. 10-1999-0007509

The present invention has been proposed to solve the above problems, and an object of the present invention is to treat the collected industrial dust and fly ash without flying.

The present invention also aims to effectively treat industrial sludge.

In addition, an object of the present invention is to produce a solid fuel having a high calorific value during the treatment of dust and fly ash and sludge.

 The present invention provides a dust and fly ash treatment method for treating dust and fly ashes to prevent environmental pollution due to dust and fly ash,

It includes; solidification step of mixing the dust or hydration reaction does not occur when mixing with water or waste oil and the dust and fly ash treatment solution;

The dust and fly ash treatment solution is a mixture of any one or two of water, waste oil,

The solidification step is to prevent the dust and fly ash flying is characterized in that to prevent environmental pollution due to dust and fly ash.

In another aspect, the present invention is a solid by mixing a heating material comprising any one or more of sewage sludge, paper sludge, food sludge, petrochemical sludge, concentrated sludge, wood powder, fine rice flour, carbonaceous fine powder to the solid formed through the solidification step Fueling step of forming a fuel; characterized in that it further comprises.

In another aspect, the present invention is characterized in that to prevent the whitening phenomenon during combustion by mixing the cleansing agent and the coagulant together with the heating material in the fuelization step to prevent scale generation in the pipe during combustion and increase the thermal efficiency.

In addition, the present invention is to mix the water and oil through the emulsification treatment in the solidification step,

The solid fuel formed through the fuelization step is characterized in that to exhibit a uniform thermal efficiency.

In another aspect, the present invention is characterized in that it further comprises a molding step of forming a fuel pellet by compression molding the solid fuel formed through the fueling step with a molding machine.

In addition, the present invention further comprises an oil coating step of coating the surface of the fuel pellets with paraffin or animal oil;

Through the oil coating step, it is possible to prevent oil evaporation of the surface of the solid fuel, to prevent the generation of soot or soot during combustion, and to block the air exposure of dust and fly ash.

In another aspect, the present invention is characterized in that it further comprises a compression packing step of wrapping the solid fuel formed through the fueling step with heat-shrinkable vinyl and then hot-shrinkable vinyl by the hot air compression molding the solid fuel.

The present invention also provides a solid fuel produced by the dust and fly ash treatment method of any one of the above methods.

The dust and fly ash treatment method according to the present invention has an effect of treating the dust and fly ash not to fly.

In addition, the present invention is effective in treating sludge at the same time dust and fly ash treatment.

In addition, the present invention has the effect of obtaining a solid fuel with a high calorific value during the treatment of dust and fly ash and sludge.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a flow chart for the dust and fly ash processing method according to the present invention.

Hereinafter, various embodiments of the present disclosure will be described with reference to the accompanying drawings. However, this is not intended to limit the techniques described in this document to specific embodiments, but should be understood to cover various modifications, equivalents, and / or alternatives to the embodiments of this document. In connection with the description of the drawings, similar reference numerals may be used for similar components.

In addition, the expressions "first," "second," and the like used in this document may modify various components in any order and / or importance, and may distinguish one component from another. Used only and do not limit the components. For example, the 'first part' and the 'second part' may indicate different parts regardless of the order or importance. For example, without departing from the scope of rights described in this document, the first component may be called a second component, and similarly, the second component may be renamed to the first component.

Also, the terminology used herein is for the purpose of describing particular embodiments only and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. The terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. Among the terms used in this document, terms defined in the general dictionary may be interpreted as having the same or similar meaning as the meaning in the context of the related art, and ideally or excessively formal meanings are not clearly defined in this document. Not interpreted as In some cases, even if terms are defined in the specification, they may not be interpreted to exclude embodiments of the present disclosure.

1 is a flow chart for the dust and fly ash processing method according to the present invention.

It demonstrates with reference to FIG.

Prior to describing the dust and fly ash treatment method according to the present invention will be defined for the hydration reaction.

The hydration reaction refers to the phenomenon that cement is cured to solid state with exothermic reaction as it is mixed with solution. That is, the hydration reaction is a kind of solidification phenomenon.

In the present invention, the dust and fly ash are classified into dust and fly ash (hereinafter referred to as "hydratable dust and fly ash") in which the hydration reaction occurs, and dust and fly ash (hereinafter referred to as "non-hydratable dust and fly ash") in which the hydration reaction does not occur. Explain.

This is because the characteristics of the solid fuel produced by the hydrated dust and fly ash and the solid fuel produced by the non-hydratable dust and fly ash are distinguished, and the use of the combustion products of the solid fuel is different. This will be described later in detail.

Hydrating dust and fly ash are dust and fly ash containing a large amount of lime, the main component of cement, and are mainly dust and fly ash collected through the combustion process of industrial sites such as incinerators, thermal power plants, and steel mills.

Hydrated dust and fly ash are burned to the maximum extent and no further combustion occurs. Therefore, no pyrolysis occurs during combustion.

On the other hand, non-hydratable dust and fly ash are mainly dust and fly ash that are collected without a combustion process in a mill and a textile mill, and pyrolysis occurs during combustion.

In the present invention, in order to prevent dust and fly ash from being blown away, the water-soluble dust and fly ash, which are hydrated when mixed with water or waste oil, or the non-hydratable dust and fly ash, which are not hydrated, are mixed with the dust and fly ash treatment solution. Step S10 is performed.

The dust and fly ash treatment solution is a mixture of any one or two of water, waste oil.

Waste oil here refers to oil waste that is disposed of.

Hydrating dust and fly ash are cured while solidifying through the solidification step (S10).

On the other hand, the non-hydratable dust and fly ash becomes a thick dough form through the solidification step (S10).

As such, the dust and fly ash are not blown through the solidification step (S10).

In the present invention, the treatment of dust and fly ash and sludge, which is another source of environmental pollution, were treated and solidified.

This is a reconstruction of the contaminants from the conventional landfill method for treating contaminants and recycling them into resources.

In the present invention, the solidification step (S10), followed by the fuelization step (S20).

The fuelization step (S20) is a step of forming a solid fuel by mixing the heating material with the solid formed through the solidification step (S10).

The heat generating material includes any one or more of sewage sludge, paper sludge, food sludge, petrochemical sludge, concentrated sludge, wood flour, fine rice flour, and carbonaceous powder.

In the fuelization step (S20) it may be mixed with the heating agent and the scouring agent with the heating material.

Adding a cleansing agent, which is a kind of rust preventive agent, prevents whitening that occurs during combustion and induces complete combustion to prevent generation of scale in the pipe during combustion.

In addition, by adding a flame retardant, it is possible to improve the thermal efficiency by helping to ignite.

The solid fuel thus produced is a mixture of water and oil inside. Water and oil do not mix well. Therefore, the calorific value varies depending on the position of the solid fuel, and thus uniform product characteristics are not secured.

Thus, in the present invention, the calorific value of the solid fuel is made uniform through the emulsification treatment.

The emulsification treatment may be performed in the solidification step S10.

The emulsification treatment is to mix the water and oil well so that the solid fuel formed through the fuelization step (S20) to exhibit a uniform thermal efficiency.

When emulsifying, water and oil are mixed well by adding sodium alginate, carboxymethyl cellulose (CMC), and adhesive at high speed.

Water or waste oil mixed in the manufacture of solid fuels, cleansing agents and auxiliaries, dust and fly ash, sludge, and fine powder have a weight ratio of 1 to 5: 0.001 to 0.01: 1 to 5: 1 to 5: 1 to 5 It is preferable.

In the above, the solidification step (S10) and the fuelization step (S20) is divided in order, but the solidification step (S10) and the fuelization step (S20) can be performed simultaneously. That is, water or waste oil, dust and fly ash, such as sewage sludge may be mixed with a heating material.

Solid fuel formed through the fuelization step (S20) is formed by compression molding with a molding machine to make a pellet for fuel (S30).

Following the molding step S30, the oil coating step S40 may be further performed.

Oil coating step (S40) is a step of coating the surface of the pellet for fuel with paraffin or animal oil.

Through the oil coating step (S40) to prevent the oil evaporation of the surface of the solid fuel, to prevent the generation of soot or soot during combustion, it has the effect of blocking the air exposure of dust and fly ash.

When there is a lot of moisture included in the solid fuel, the compression packing step S40 may be performed after the fuelization step S20.

The compression packing step (S40) is a step of wrapping the solid fuel formed through the fuelization step (S20) with heat-shrinkable vinyl, followed by hot-shrinkable plastic compression molding of the solid fuel with hot air.

Solid fuel produced in this way has a calorific value of more than 4,000kcal, it can be used as fuel for thermal power plants.

Combustion products of solid fuels remove heavy metals and harmful components by magnets or through a strainer.

After inspecting the combustion product for hydration reaction, the hydrated combustion product is used as cement raw material, refractory brick, artificial reef, artificial aquatic plant, garden stone, building material, water purifier, and the like. Used as a compost for purification.

Sludge is typically acidic, and dust and fugitives are alkaline, resulting in neutral or weak alkalinity when these components are mixed. As a result, they can be used for composting and soil purification.

After the dust and fly ash treatment method according to the present invention and the solid fuel produced by this method to form a solid by mixing the dust and fly ash treatment solution, such as water, waste oil, in the dust and fly ash collected in incinerators, thermal power plants, etc. By producing a solid fuel by mixing heat generating materials such as sludge, petrochemical sludge, and fine milling powder, waste sludge is effectively treated with dust and fly ash, which are environmental pollution factors, and a solid fuel having high calorific value is produced.

While the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Solidification Step S10
Fuelization step S20
Molding Step S30
Compression Packing Stage S40
Oil coating step S50

Claims (16)

In the dust and fly ash processing method to prevent dust and fly ash to prevent environmental pollution caused by dust and fly ash,
It includes; solidifying step (S10) of mixing the dust and fly ash and the dust and fly ash treatment solution that hydration reaction occurs when mixed with water or waste oil;
The dust and fly ash treatment solution is a mixture of any one or two of water, waste oil,
Through the solidification step (S10) to prevent the dust and fly ashes flying to prevent environmental pollution due to dust and fly ash,
Solid fuel is mixed with a heating material comprising any one or more of sewage sludge, paper sludge, food sludge, petrochemical sludge, concentrated sludge, wood flour, fine rice flour, carbonaceous powder and the solid formed through the solidification step (S10). Further comprising; Fueling step (S20) to form a;
In the fuelization step (S20) by mixing the cleansing agent and the coagulant together with the heating material to prevent the whitening phenomenon during combustion to prevent the generation of scale in the pipe during combustion, and improve the thermal efficiency,
By the emulsification treatment in the solidifying step (S10) to mix water and oil,
While the solid fuel formed through the fuelization step (S20) to exhibit a uniform thermal efficiency,
The emulsification treatment mixes water and oil well by adding sodium alginate, CMC (carboxymethyl cellulose), adhesive and rotating at high speed when mixing water and oil,
Forming step (S30) of making a pellet for fuel by compression molding the solid fuel formed through the fuelization step (S20) with a molding machine;
Further comprising a; oil coating step (S40) for coating the surface of the fuel pellets with paraffin or animal oil,
Through the oil coating step (S40) to prevent the oil evaporation of the surface of the solid fuel, to prevent the generation of soot or soot during combustion, to block the air exposure of dust and fly ash,
After the solidification of the solid fuel formed through the fueling step (S20) wrapped with heat-shrink vinyl, the heat-shrinkable vinyl compression compression step (S40) to further compress the solid fuel; characterized in that it further comprises, dust and fly ash processing Way
delete delete delete delete delete delete Solid fuel produced by the dust and fly ash treatment method of claim 1
In the dust and fly ash processing method to prevent dust and fly ash to prevent environmental pollution caused by dust and fly ash,
And solidifying step (S10) of mixing the dust and fly ash with the dust and fly ash treatment solution that does not occur when the water and waste oil is mixed with the waste oil
The dust and fly ash treatment solution is a mixture of any one or two of water, waste oil,
Through the solidification step (S10) to prevent the dust and fly ashes flying to prevent environmental pollution due to dust and fly ash,
Solid fuel is mixed with a heating material comprising any one or more of sewage sludge, paper sludge, food sludge, petrochemical sludge, concentrated sludge, wood flour, fine rice flour, carbonaceous powder and the solid formed through the solidification step (S10). Further comprising; Fueling step (S20) to form a;
In the fuelization step (S20) by mixing the cleansing agent and the coagulant together with the heating material to prevent the whitening phenomenon during combustion to prevent the generation of scale in the pipe during combustion and to increase the thermal efficiency,
By the emulsification treatment in the solidifying step (S10) to mix water and oil,
While the solid fuel formed through the fuelization step (S20) to exhibit a uniform thermal efficiency,
The emulsification treatment mixes water and oil well by adding sodium alginate, CMC (carboxymethyl cellulose), adhesive and rotating at high speed when mixing water and oil,
Forming step (S30) of making a pellet for fuel by compression molding the solid fuel formed through the fuelization step (S20) with a molding machine;
Further comprising a; oil coating step (S40) for coating the surface of the fuel pellets with paraffin or animal oil,
Through the oil coating step (S40) to prevent the oil evaporation of the surface of the solid fuel, to prevent the generation of soot or soot during combustion, to block the air exposure of dust and fly ash,
After the solidification of the solid fuel formed through the fueling step (S20) wrapped with heat-shrink vinyl, the heat-shrinkable vinyl compression compression step (S40) to further compress the solid fuel; characterized in that it further comprises, dust and fly ash processing Way
delete delete delete delete delete delete Solid fuel produced by the dust and fly ash treatment method of claim 9

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