KR20150057418A - Apparatus for disposing ai-pe waste material by low temperature burning process and method thereof - Google Patents

Abstract

The present invention relates to an apparatus for low temperature combustion disposing AI-PE waste and a method therefor. After Al-PE waste, that is, a polyethylene (PE) film where an aluminum (Al) film is bonded is pyrolyzed by a combustion furnace having the temperature of about 200 to 400 degrees Celsius, the waste is condensed, and a liquid PE is extracted. After a PE residual combustion gas discharged from the combustion furnace is heated by the heating furnace at the high temperature of 800 degrees Celsius using the extracted liquid PE as a fuel to remove a dioxine material, the present invention removes harmful gases and dust by a filter where a filter medium such as activated carbon is filled to only discharge the purified green gas. According to the present invention, the AI-PE waste can be effectively and eco-friendly disposed by stepwise processing using the condensed liquid PE itself as the fuel without using the additional fuel.

Description

  FIELD OF THE INVENTION [0001] The present invention relates to an apparatus and a method for treating low-temperature combustion of Al-PE wastes,

In the present invention, Al-PE waste of a polyethylene (PE) film to which an aluminum foil is adhered is heated to about 200 to 400 ° C by a furnace and then thermally decomposed and then condensed to extract the liquid PE, The residual combustion gas of PE discharged from the combustion furnace is heated by a heating furnace to a high temperature of 800 ° C or higher to remove dioxin and then the noxious gas and dust are removed by a filter filled with activated carbon, The present invention relates to an apparatus and a method for treating low-temperature combustion of Al-PE waste that safely treat waste of AL-PE in an environmentally friendly manner.

Generally, since polyethylene film with aluminum foil is used as various packaging materials, a large amount of Al-PE waste is coming out, and most of it is collected and incinerated because it is not corroded or oxidized as it is.

The incinerator for waste of synthetic wastes is well known in the prior art, and examples of the preceding documents are as follows.

The vacuum incineration apparatus for waste disposal and the vacuum incineration apparatus of the incineration apparatus are characterized in that a vacuum apparatus is connected to the incinerator of the waste, and the gas generated during the incineration of the waste is forcedly aspirated A plurality of vacuum tanks can be sequentially operated to maintain the degree of vacuum in the incinerator, thereby effectively preventing the generation of toxic substances.

Patent Document Registration No. 10-1302482 discloses a flammable waste disposal apparatus comprising a rotary incinerator for carbonizing waste having a cooling pipe, a transfer portion for inputting waste, a blocking plate for carbonizing the waste by heating the waste in a rotary incinerator, An exhaust jacket for discharging the carbide of the incinerator, an exhaust gas passage for guiding the exhaust gas, a plurality of dust collectors and a settling tank are combined to continuously incinerate various wastes, To react with chlorine gas to discharge the hydrogenated gas.

The waste incineration incinerator has an air inflow part in which air is spirally swirled in the internal space of the waste incineration system, so that the waste rubber, waste synthetic resin, etc. injected into the incinerator are completely And burned the waste without burning soot and preventing air pollution.

In addition to the above-described prior arts, in general, since incineration treatment of combustible wastes uses a separate fuel, incineration treatment costs of waste are high, resulting in a large economic burden, and therefore, it is difficult to treat wastes efficiently.

An object of the present invention is to provide a method of manufacturing a polyethylene (PE) film in which an aluminum foil is adhered, that is, Al-PE waste is heated by a furnace at a relatively low temperature of about 200 to 400 ° C And then condensed to extract the liquid PE. The PE remaining combustion gas discharged from the combustion furnace using the extracted liquid PE as a fuel is heated to a high temperature of 800 DEG C or higher by a heating furnace to remove dioxin, It is an object of the present invention to provide an apparatus and a method for treating low-temperature combustion of Al-PE waste, which is capable of safely treating AL-PE wastes in an environmentally friendly manner without using any energy by removing harmful gas and dust by a filter filled with a filter material such as carbon .

The present invention relates to a burner for burning AL-PE wastes at a low temperature of about 200 to 400 ° C to thermally decompose PE, and a method for condensing gaseous PE contained in a combustion gas generated in the burning furnace to extract PE A heating furnace for removing the dioxin which is an environmental pollutant by heating the PE residual combustion gas discharged from the furnace to a temperature of 800 ° C or higher using the extracted liquid PE as fuel, And a filter having a filter medium for adsorbing and filtering dust and harmful gas condensed in the cooler.

   In the above combustion furnace, Al-PE waste is injected into the upper part of the furnace, and the lid is loaded on the roast frame to seal the lid and the temperature regulator is provided on the upper part.

 The condenser is provided with a cooling coil for circulating cold water therein. The inlet of the condenser is associated with the discharge port of the combustion furnace. The inclined bottom outlet of the condenser is provided with a train valve, So that it is extracted.

The liquid PE collected in the collecting vessel is used as an energy source of the waste disposal apparatus of the present invention.

The heating furnace has a burner, and the outlet of the condenser and the inlet of the heating furnace are connected through a suction fan. By the operation of the suction fan, unburned combustion gas in the condenser is sucked into the heating furnace and heated to a high temperature to remove dioxin, which is an environmental pollutant.

In the cooler, the outlet of the heating furnace and the inlet of the cooler are associated with each other, so that the heated fume gas is cooled, so that the moisture and the dust of the fine particles aggregate.

The filter is filled with various kinds of filter media such as activated carbon, adsorbent and the like, and the outlet of the cooler and the inlet of the filter are associated with each other.

The fine dust introduced into the filter and the noxious gas decomposed from the harmful substances contained in the PE are adsorbed and only harmless gas is discharged to the outlet of the filter.

Each of the components belongs to a known device, but in the present invention, it is characterized in that it is arranged in a sequence suitable for low-temperature heat treatment of Al-PE waste.

The method for low temperature heat treatment of Al-PE wastes according to the present invention using the above-mentioned configuration is a method for performing the above-mentioned apparatus step by step, comprising a step of burning Al-PE waste, an extraction step of PE, a step of removing dioxin, Of the filtration step.

In the combustion treatment step of the Al-PE waste, a predetermined amount of Al-PE waste is injected into the combustion furnace, and the combustion treatment is performed at a relatively low temperature of 200 to 400 캜 using an air conditioner provided in the combustion furnace. PE among the Al-PE wastes injected into the furnace is softened and burnt because it is a combustible material. Since the discharge port of the combustion furnace is associated with the suction fan provided in the heating furnace, the inside of the furnace is maintained at a negative pressure by the operation of the suction fan.

Therefore, even if the internal temperature of the furnace is about 200 to 400 ° C, the PE is easily thermally decomposed to burn a part of the furnace, and a part of the PE is softened and gaseous and discharged together with the combustion gas.

PE of PE is 50% or more of high density (0.97) PE and low density (0.91) PE in Al-PE waste, but there is no such classification in combustion process. When PE is softened at 100 ~ 130 ℃ and heated to about 200 ~ 400 ℃, ethylene is thermally decomposed in the polymerization state, and some of the ethylene which is decomposed is burned and overflowed. Part of the PE is gaseous, .

The melting point of Al (aliminium) attached to PE is about 660 ° C, so it does not melt at 400 ° C and remains in the combustion furnace together with inorganic materials that are not burned apart from PE. The furnace is a batch type of one-time treatment.

In the PE extraction step, the combustion gas and the gaseous decomposition substances burned in the combustion furnace are discharged from the combustion furnace and flow into the condenser. There are one or more condensers.

The PE in the gaseous state including the combustion gas introduced into the condenser is condensed into the liquid PE by the cooling action of the cold water passing through the cooling coil. The gas that does not shrink and the liquid PE which is condensed are separated, Of PE are extracted into the outlet of the cooler and collected in the collection vessel. Since the collected liquid PE is in a liquid state at room temperature, it is directly supplied to the burner as a heat energy source for waste treatment.

In the step of removing dioxin, the liquid PE condensed by the condenser is extracted, and the uncompacted flue gas is discharged to the outlet of the condenser and flows into the inlet of the furnace by the operation of the suction fan.

The gas introduced into the furnace is heated to a high temperature of 800 ° C or higher by a burner provided in the heating furnace to remove dioxin, which is a pollutant present in the combustion gas.

Dioxin is an aromatic compound in which two benzene rings are connected by two oxygen atoms and chlorine is bonded thereto, and is known to be the most toxic pollutant, and dioxin molecules are decomposed and removed by high temperature.

In the filtration step of the exhaust gas, the combustion gas from which the dioxin is removed from the furnace flows into the inlet of the cooler at the outlet of the furnace and is cooled by the cooling action of the cooler. At this time, as the combustion gas is cooled, fine dust aggregates by condensation of water, and is discharged to the outlet of the cooler, and flows into the inlet of the filter. Since the filter is provided with a filter medium such as activated carbon and an adsorbent, the fine dust introduced into the filter and the harmful gas decomposed in the PE are adsorbed to the filter medium, and the purified green gas is discharged to the atmosphere through the outlet of the filter.

 The present invention has the gist of the invention to treat Al-PE waste in an environmentally friendly manner without using any thermal energy and without discharging dioxin.

Unburned Al remains in the combustion furnace and can be recovered, and recovered Al can be recycled. This is a by-product from the processing of waste of PE and is not an object of the invention.

Since the above-described series of processing steps are performed in association with the combustion operation of the waste in the combustion furnace, after all of the waste of Al-PE put into the combustion furnace is burnt, all the above-mentioned processing steps are completed, The residue is removed and the Al-PE waste to be treated is charged and repeatedly processed as above.

The present invention relates to a flue gas purifying apparatus and a flue gas purifying apparatus, which comprises a combustion furnace for treating an Al-PE waste product at about 200 to 400 ° C, a condenser for cooling the combustion gas to extract liquid PE, a heating furnace for removing dioxin, Since Al-PE wastes can be treated safely and efficiently with Al-PE wastes by sequential treatment steps, it is composed of a combination of dusts of dioxin-free flue gas, a cooler that cools the gas, and a filter with filter media. have.

In addition, since waste is treated by the above-described apparatus by the combustion treatment step of Al-PE waste, the PE extraction step, the dioxin removal step and the exhaust gas filtration step, the inside of the combustion furnace is maintained at a negative pressure, Since PE is easily decomposed by low temperature combustion and PE of liquid phase is extracted by a condenser, it is used as a fuel to remove waste combustion and dioxin. Therefore, it is more economical and eco-friendly Can effectively treat Al-PE wastes.

1 is a view showing an embodiment of a treatment apparatus arranged according to the treatment steps of the Al-PE waste of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A polyethylene (PE) film to which an aluminum (Al) foil as shown in FIG. 1 is adhered, that is, a burning furnace 1 for burning AL-PE waste at a low temperature of about 200 to 400 ° C; A condenser (2) for condensing the combustion gas generated from the combustion furnace to extract liquid phase PE; A heating furnace (3) for removing dioxin, which is an environmental pollutant, by heating the combustion gas discharged from the combustion furnace (1) to a temperature of 800 ° C or more using liquid PE extracted from the condenser (2) as fuel; A cooler (4) for cooling the gas discharged from the heating furnace (3); And a filter 5 for adsorbing and filtering dust and harmful gas condensed in the cooler.

   The combustion furnace 1 is provided with a lid 1c for closing and sealing the Al-PE waste (Al-PE). A lid 1c is provided with a thermometer 1g and an air conditioner 1d, (1u) is connected to the upper side of the condenser (2) on the lower side of the frame (1s) of the condenser (1).

The condenser 2 is a cooling tower provided with a cooling coil 2c through which cold water is circulated so that the outlet 1u of the combustion furnace 1 is connected to the inlet 2n on the upper side of the condenser 2 as a conduit, A train valve 2v is provided in the lower end outlet 2d of the main body 2 so that the liquid PE condensed in the combustion gas is extracted and collected in the collection container 2t.

The heating furnace 3 is provided with a burner 3b and an outlet 2u of the condenser 2 and an inlet 3n of the heating furnace 3 are connected to each other through a suction fan 3f . The heating furnace 3 heats dioxin, which is an environmental pollutant present in the combustion gas discharged without being condensed in the condenser 2, at a high temperature.

Since the suction fan 3f is associated with the discharge port 1u of the combustion furnace 1 through the condenser 2, the inside of the combustion furnace 1 is maintained at a negative pressure by the operation of the suction fan 3f. do.

The cooler 4 is connected to the discharge port 3u of the heating furnace 3 and the inlet port 4n of the cooler 4 so as to cool the heated gas to coagulate the particulate matter .

The filter 5 is filled with various filter media 5m such as activated carbon 5c and an adsorbent and the outlet 4u of the cooler 4 and the inlet 5n of the filter 5 are connected to each other by conduits, And the purified gas filtered by the harmful gas is discharged to the atmosphere.

Although the combustion furnace 1, the condenser 2, the heating furnace 3, the cooler 4 and the filter 5 of the above-mentioned components belong to the usual devices respectively known individually, And is arranged in a sequence suitable for each process of the low-temperature heat treatment method of the PE waste.

With the apparatus of the present invention thus configured, the Al-PE waste is treated in the following steps.

(1) Burning step of Al-PE waste

The lid 1c of the combustion furnace 1 is opened and about 100 kg of Al-PE waste is introduced into the combustion furnace 1 and the air is adjusted by the air conditioner 1d installed in the lid 1c, And the lid 1c is sealed to promote combustion. PE among Al-PE waste is combustible because it is a combustible material. The thermometer 1g, the air conditioner 1d, and the like are typical control mechanisms useful for safely operating the furnace 1 internally.

Since the suction fan 3f provided in the heating furnace is connected to the discharge port 1U of the combustion furnace 1 through the condenser 2, the inside of the combustion furnace 1 is depressurized in accordance with the operation of the suction fan 3f, (Negative pressure). Therefore, PE is softened at 100 ~ 130 ℃ and at relatively low temperature of about 200 ~ 400 ℃, PE is thermally decomposed in the polymerization state, so that some of the ethylene decomposed is burned and some of the gaseous PE is heated (2n) of the condenser (2) through the discharge port (1u) of the condenser (1).

Since the melting point of Al adhered to PE is about 660 ° C, it does not melt at the temperature of the furnace but remains with the other inorganic material which is not burned in the heating furnace 1 while being separated from PE.

Since the combustion furnace 1 is a batch type of one-time processing, after the Al-PE waste of about 100 kg at a time is charged into the combustion furnace 1, all of the Al-PE waste put into the heating furnace 1 is subjected to the combustion treatment There is no new waste input before. The processing time in this embodiment was about 3 to 4 hours per batch.

(2) extraction step of PE

The combustion gas burned in the combustion furnace 1 is discharged from the discharge port 1u of the combustion furnace 1 and flows into the inlet port 2n of the ballast 2.

The combustion gas introduced into the condenser 2 contains gaseous PE and other substances. By the cooling action of the cold water passing through the cooling coil 2c, the gaseous PE is condensed into the liquid phase PE. The liquid phase PE condensed with the gas not condensed is separated by the distillation action in the condenser 2. The condensed liquid PE is extracted through the outlet 2d of the condenser 2 and collected in the collection container 2t. The collected liquid PE is a main component of flammable ethylene and is used as a direct source of heat energy to the burner since it is liquid at normal temperature.

(3) Step of removing dioxin

The combustion gas not condensed in the condenser 2 is discharged to the discharge port 2u and flows into the inlet port 3n of the heating furnace 3 by the operation of the suction fan 3f. The combustion gas combusted in the combustion furnace 1 continues to flow into the heating furnace 3 through the condenser 2 due to the operation of the suction fan 3f, The heating action of the furnace 3 is related to each other.

The gas introduced into the heating furnace 3 by the suction fan 3f provided in the heating furnace 3 is heated to a high temperature of about 800 DEG C by the burner 3b to remove the dioxin which is a pollution substance present in the combustion gas . .

Dioxin is an aromatic compound having two benzene rings connected to two benzene rings and also chlorine bonded. It is known as the most toxic pollutant, and dioxin molecules are decomposed and removed by high temperature of 800 ° C or higher.

In this case, the energy cost for removing dioxin is high. However, in the present invention, since the liquid PE extracted from the waste is used as the fuel, the external fuel is not used and the dioxin can be economically removed as much.

(4) Filtration step of exhaust gas

The combustion gas from which the dioxin is removed in the heating furnace 3 flows into the inlet 4n of the cooler 4 from the discharge port 3u to the heating furnace 3 and is cooled by the cooling action of the cooler 4. At this time, as the water contained in the combustion gas condenses, fine dust aggregates and is discharged to the outlet 4u of the cooler 4 and flows into the inlet 5n of the filter 5.

Since the filter 5 is provided with the filter medium 5m such as the activated carbon 5c and the adsorbent, the fine dust introduced into the filter 5 and the harmful gas decomposed in the PE are mixed with the activated carbon 5c and the filter medium 5m And the purified green gas is discharged through the outlet 5u of the filter 5 to the atmosphere.

  Unburned Al and other inorganic substances remain in the furnace, and Al can be recovered and recycled.

The above-mentioned series of processing steps consists of a batch type, and the PE waste can be effectively processed repeatedly by the same apparatus and processing step each time.

1: combustion furnace 1c: cover 1d: air conditioner
1g: thermometer, 1u: outlet
2: condenser 2c: cooling coil 2d: outlet 2n: inlet
2t: Collecting container 2u: Outlet
3: Heating furnace 3b: Burner 3f: Suction fan 3n: Inlet port 3u: Outlet
4: cooler 4n: inlet 4u: outlet
5: filter 5c: activated carbon 5m: filter medium 5n: inlet 5u: outlet

Claims (6)

In an apparatus for treating AL-PE waste,
A condenser for condensing the combustion gas generated in the combustion furnace to extract the liquid PE, and a condenser for extracting the liquid PE from the condenser, A heating furnace for heating the combustion gas discharged from the combustion furnace to a temperature of 800 DEG C to remove dioxin as an environmental pollutant, a cooler for cooling the gas discharged from the heating furnace, And a filter equipped with a filter medium for adsorbing and filtering dust and harmful gas of the coagulated fine particles are arranged in the order of the treatment step of the waste. The method according to claim 1,
Since the suction fan provided in the heating furnace is connected to the discharge port of the combustion furnace through the condenser, the inside of the combustion furnace is maintained at a negative pressure during the operation of the suction fan, so that the Al- Deg.] C at a relatively low temperature, The method of claim 1, wherein
Wherein the condenser connected to the discharge port of the combustion furnace is provided with a water-cooled coil, and a collecting container for the liquid PE is provided on the outlet side of the condenser, and the gaseous PE decomposed in the furnace is extracted into the liquid phase PE. Device for low temperature combustion of PE waste. Burning the Al-PE waste by burning at a temperature of 200 to 400 ° C by a furnace equipped with a burner and a blower; A PE extraction step of condensing the liquid phase PE by a condenser equipped with a cooling coil to extract the combustion gas discharged from the combustion furnace; Removing the dioxin by heating the heated dioxin contained in the combustion gas to a temperature of 800 DEG C by using the recovered liquid PE as a fuel; And a filter step of cooling the combustion gas from which the dioxin is removed by a cooler to aggregate the dusts and to adsorb and remove dust and noxious gas by a filter equipped with a filter medium. Gt; Al-PE < / RTI > 5. The method of claim 4,
Wherein the dioxin contained in the combustion gas discharged without being condensed in the condenser is heated to a high temperature of 800 占 폚 in a heating furnace to remove it. 5. The method of claim 4,
Wherein the PE in the liquid phase extracted in the PE extraction step is used as the fuel for the combustion furnace and the heating furnace to perform the heat treatment.

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