KR101414355B1 - Recovering apparatus of Methyl MethAcrylate and Alumina from Waste Artificial Marvel and method using the same - Google Patents

Abstract

More particularly, the present invention relates to a device for recovering MMA and alumina from waste marble, and more particularly, to a method for separating raw materials used in artificial marble by pyrolyzing waste marble, And recovering the MMA and alumina from the waste marble. The present invention relates to a pulverizing unit for pulverizing waste marble using a pulverizer to recover MMA and alumina from crude marble containing aluminum hydroxide and MMA (methyl methacrylate); A pyrolysis furnace for pyrolyzing pyrolytic marble which has been pulverized in a pulverizing section; An MMA recovery unit for recovering and recovering MMA from crude marble which is pyrolyzed in a pyrolysis furnace; And an alumina recovery unit for recovering and recovering alumina from the crude marble pyrolyzed in the pyrolysis furnace. The MMA recovery unit includes a fractionation unit for extracting MMA. In the fractionation unit, The method for recovering MMA and alumina according to claim 1,

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering ММА and alumina from a crude marble and a method for recovering ММА and alumina from the marble,

More particularly, the present invention relates to a method of extracting MMA and alumina from waste marble, and more particularly, to a method of extracting MMA and alumina from a waste marble by thermal decomposition of scrap and dust of waste marble, The present invention relates to an apparatus for recovering MMA and alumina from waste artificial marble, which reduces the cost of raw materials and waste by recovering and reusing MMA and alumina, and a recovery method using the same.

Artificial marble, such as kitchen, bathroom, hospital, bank, etc., is being applied variously as indoor and outdoor finishing materials. In overseas, this is applied to the interior as well as the outer wall and is used as an item to add beauty of the building. Most of them are applied as kitchen tops in Korea. Among the artificial marble, the most commonly used material is MMA (Methyl Methacrylate). MMA artificial marble is produced by curing a natural ore powder with a thermoplastic acrylic resin and compressing it into a plate. More particularly, the present invention relates generally to a resin composition such as thermosetting unsaturated polyester and thermoplastic MMA (Methyl Methacrylate), PMMA (Poly Methyl Methacrylate), aluminum hydroxide, barium sulfate, barium carbonate, calcium carbonate, silica, granite, Additive such as stone powder, surface treatment agent, crosslinking agent, curing agent, dispersant, coloring agent is added and cured, and then molded into a compression press to produce artificial marble similar to natural marble. This product is a non-porous material with excellent waterproof, stain resistance and chemical resistance. According to the artificial marble product data released by the National Statistical Office, domestic artificial marble production has shown steady progress since 2007. The artificial marble market, which had a production capacity of 116,905 tons in 2007, grew to 120,000 tons in 2008. Since then, it has increased by 30,000 tons to 154,400 tons in 2009 and increased to 162,994 tons in 2010.

As the production of artificial marble increases sharply every year, the amount of crude marble scrap and dust, which is generated at the time of production, is also increasing rapidly. Scrap and dust, which are by-products, can not be used for other products, and most of them are disposed of by simple landfill or incineration. However, after landfill costs are secured and landfill is unstable, secondary soil contamination is induced, In case of incineration, pollution of the atmospheric environment is caused by the generation of harmful gas and odor and the generation of carbon dioxide.

Meanwhile, methyl methacylate (MMA), a new raw material for acrylic materials, is widely used in various fields such as household goods (adhesives, paints, inks, textile yarns, accessory products, electronic office products, . However, the domestic market is not smooth due to lack of domestic production compared to the demand, and some depend on imports.

In addition, the recent rise in crude oil prices has caused an increase in the cost of energy production and petroleum related products, which has adversely affected the domestic industry as a whole. Acrylic, one of these petroleum related products, is also affected.

Therefore, the problem of extracting MMA and alumina from reclaimed marble and recycling is increasingly needed in terms of energy cost reduction, resource recycling and environmental aspects in Korea where resources are scarce.

A first object of the present invention is to provide a device for recovering MMA and alumina from crude marble which can increase the recoverability of MMA and alumina contained in marble containing waste, Method.

A second object of the present invention is to provide an apparatus for recovering MMA and alumina from a crude marble which is environmentally friendly and harmless to the human body, and a recovery method using the same.

In order to solve the above-mentioned problems, the present invention provides an apparatus for recovering MMA and alumina from crude marble containing aluminum hydroxide and MMA (methyl methacrylate), comprising: a pulverizing unit for pulverizing waste marble using a pulverizer; ; A pyrolysis furnace for pyrolyzing pyrolytic marble which has been pulverized in a pulverizing section; An MMA recovery unit for recovering and recovering MMA from crude marble which is pyrolyzed in a thermal decomposition furnace; An alumina recovery unit for recovering and recovering alumina from crude marble which is pyrolyzed in a pyrolysis furnace; The MMA recovery unit includes a fractionation unit for extracting MMA, and an acidic solution is added to the fractionation unit to remove substances other than MMA.

In addition, the temperature of the pyrolysis furnace is in the range of 200 to 600 ° C, and the inside of the pyrolysis furnace is filled with nitrogen gas or inert gas so that the crude marble as the pulverized waste is not oxidized in the pyrolysis furnace, And the pyrolysis furnace is rotated.

And a first condenser for condensing the mixture containing gaseous MMA transferred from the pyrolysis furnace and for separating the mixture containing MMA condensed using the first condenser into organic materials including MMA and wastewater And an oil-water separator.

And a second condenser for condensing the gaseous MMA generated in the fractionation unit, wherein the MMA storage tank stores the condensed MMA in the second condenser.

The MMA recovery unit may further include an alkali solution addition unit for adding the alkali solution to the MMA stored in the MMA storage tank, and further includes a filtering unit for removing impurities contained in the MMA to which the alkali solution is added.

The MMA recovery unit includes a re-distillation unit for distilling and distilling the remaining residues from the fractionation distillation unit. The MMA recovery unit includes a circulation transfer pipe for circulating organic matter including MMA generated in the re-distillation unit to the fractionation distillation unit, Further comprising a condenser.

A method for recovering MMA and alumina from waste crude marble containing aluminum hydroxide and MMA using the apparatus for recovering MMA and alumina from the waste marble is a pulverization step of pulverizing the crude marble using a pulverizer ; A pyrolysis step of pyrolyzing the pulverized crude marble powdered in the pulverization step; An MMA recovering step of recovering and recovering MMA from crude marble pyrolyzed in a pyrolysis furnace; An alumina recovery step of recovering and recovering alumina from crude marble which is pyrolyzed in a pyrolysis furnace; The MMA recovering step includes a fractional distillation step for extracting MMA, and an acidic solution is added in order to remove substances other than MMA in the fractional distillation step.

On the other hand, in the pyrolysis step, the temperature of the pyrolysis furnace is in the range of 200 to 600 ° C, and the inside of the pyrolysis furnace is filled with nitrogen gas or inert gas so that the crude marble as the pulverized waste is not oxidized in the pyrolysis furnace, A screw is installed inside the furnace, and the pyrolysis furnace rotates.

In addition, the MMA recovery step includes a first condensing step for condensing the mixture containing gaseous MMA transferred in the pyrolysis furnace in the first condenser, and the mixture containing the condensed MMA in the first condenser is mixed with the organic Further comprising an oil-water separating step for separating the material and the waste water.

The MMA recovery step may include a second condensation step for condensing the gaseous MMA generated in the fractional distillation step in the second condenser and the MMA storage step for storing the condensed MMA in the MMA storage tank in the second condensation step And further comprising:

In this case, the method further includes a step of adding an alkaline solution to the MMA stored in the MMA storage tank in the MMA storing step, and further comprising a filtering step of removing impurities contained in the MMA to which the alkaline solution is added .

The MMA recovery step includes a re-distillation step in which distillation at the fractional distillation stage is carried out to re-distill the remaining residues, and a circulation step of circulating organic matter including MMA generated in the re-distillation step to the fractionation distillation section and a third condenser And a third condensing step using the second condensing step.

As described in detail above, the apparatus for recovering MMA and alumina from the painted marble of the present invention and the method using the same are capable of recovering and recycling the waste marble as MMA and alumina by pyrolyzing the waste marble to be discarded, It is effective to prevent environmental pollution caused by marble, and to benefit from resource recycling.

In addition, by recovering MMA and alumina without disposing the marble of waste, it is possible to obtain pure MMA and fired alumina, thereby maximizing the recycling of resources.

1 is a view showing a device for recovering MMA and alumina from a waste marble in accordance with the present invention,
2 is a flow chart of a method for recovering MMA and alumina from a closed marble of the present invention,
3 to 6 are flowcharts showing the stepwise detailed process according to FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an overall schematic diagram showing an apparatus for recovering MMA and alumina from a closed marble of the present invention. Referring to FIG. 1, an apparatus 1 for recovering MMA and alumina from a waste marble according to the present invention comprises extracting MMA and alumina from a crude marble containing a flame-retardant aluminum compound as a main component of acrylic resin Thereby constituting an apparatus for recovery.

The crude marble may be composed of about 30 to 45% by weight of MMA, about 45 to 65% by weight of an inorganic filler, and a very small amount of additives. On the other hand, the aluminum compound, which is an inorganic filler among the constituent components, has good properties for improving the strength and wear resistance of artificial marble and coloring, so aluminum hydroxide is mostly used as an inorganic filler in artificial marble products produced in Korea.

The apparatus 1 for recovering MMA and alumina from the waste marble according to the present invention mainly comprises a pulverizing unit 11, a thermal decomposition furnace 22, an MMA recovering unit 3 and an alumina recovering unit 4, And a washing tower 5 for preventing the washing water.

First, the pulverizing unit 11 is constituted by pulverizing the waste marble using a pulverizer (not shown). The pulverizing unit 11 includes a powder storage tank (not shown) for storing crude marble which is pulverized in the pulverizer, And a powder screen (not shown) for re-passing the pulverized material to select the size thereof, and to transfer the pulverized material to a pulverizer or transfer it to the powder reservoir.

Next, the pulverized marble powder stored in the powder storage tank is supplied to the pyrolysis furnace 22 and pyrolyzed. At this time, the supply of the thermal decomposition furnace 22 from the powder storage tank is performed by the screw feeder. The temperature of the pyrolysis furnace 22 for the pyrolysis is maintained at 200 to 600 ° C. If the temperature of the pyrolysis furnace 22 is lower than 200 ° C., pyrolysis of the crude marble powder is difficult. If the temperature is above 600 ° C., carbonization or pyrolysis gas may be ignited and explosion may occur. .

In addition, the heating method of the pyrolysis furnace 22 is preferably an indirect heating method which can prevent the pyrolysis gas generated in the pyrolysis furnace from ignition. Among the indirect heating methods, electric heating is exemplified.

The inside of the pyrolysis furnace 22 is filled with nitrogen or an inert gas to prevent oxidation. In addition, the pyrolysis furnace 22 has a screw formed therein, and the screw rotates so that the crude marble powder charged into the pyrolysis furnace 22 flows, thereby pyrolyzing the pyrolysis product by high temperature. The volume of the space in which the crude marble as the pulverized waste flows inside the pyrolysis furnace 22 and the rotation speed of the screw are adjusted according to the amount of crude marble powder to be introduced.

The thermal decomposition furnace 22 is classified into a mixture containing alumina in a solid state powder state and an MMA in a gaseous state as it is, depending on the difference in boiling point. At this time, the alumina present in the solid powdered state refers to alumina oxide in which aluminum hydroxide as a filler is pyrolyzed, and the gasified MMA refers to a gas mixture in the pyrolysis furnace 22 including MMA. Since the aluminum oxide is industrially referred to as alumina, the alumina described in the present invention means a material such as alumina oxide.

The aluminum hydroxide is decomposed into aluminum oxide and water by a pyrolysis reaction. Water generated at this time is brought into a gaseous state by the high temperature and is transferred to the gas transfer duct 23 together with the gasified MMA. Also, in the pyrolysis furnace 22, alumina, which is deposited at the bottom in the state of solid powder, is fed to the firing furnace 41 along the feed pipe 24.

Then, the MMA recovery unit 3 recovers the MMA by repeating the condensation and distillation of the mixture containing gaseous MMA classified in the thermal decomposition furnace 22.

The MMA recovery unit 3 includes a first condenser 31 for condensing the mixture including the gaseous MMA transferred through the gas transfer duct 23 of the thermal decomposition furnace 22, A waste water tank 321 in which waste water of the lower layer separated from the oil water separator 32 is transferred and stored, and a waste water separator 323 separated from the oil water separator 32. [ A fractionation section 33 for fractionating MMA by adding an acidic solution to an organic substance including MMA in the upper layer and a redistillation section 331 for distillation of the remaining residue distilled from the fractionation section 33, A third circulation pipe and a third condenser 332 for circulating organic materials including MMA generated in the redistribution unit 331 to the fractionation unit 33; A second condenser 34 for condensing the MMA, a second condenser 34 for condensing the MM An alkali solution adding section 36 for adding an alkali solution to the MMA stored in the MMA storage tank 35; and an alkaline solution adding section 36 for adding an alkali solution in the alkaline solution adding section 36, A filtering unit 37 for removing the impurities contained in the MMA, and a final storage 38 for storing the MMA filtered by the filtering unit 37.

Referring to FIG. 1, the MMA collection unit 3 will be described in more detail as follows.

The first condenser 31 is configured to liquefy the mixture containing gaseous MMA transferred from the gas transfer duct 23. The first condenser 31 heat-exchanges the mixture containing the MMA in the gaseous state with the external cool gas to liquefy the mixture containing the gaseous MMA.

The liquefied MMA-containing mixture is conveyed to an oil-water separator 32, which collects the condensate in a vertical tower to separate the water from the upper and lower layers. The waste water separated in the lower part of the oil water separator 32 is transferred to a waste water storage tank 321 connected to the oil water separator 32 by using an on-off valve installed under the oil water separator 32. In the oil water separator 32 The mixture containing the MMA remaining after completing the discharge of the wastewater is introduced into the fractionation section 33 using the external transfer pump or the potential energy due to the height difference.

At this time, the fractionation unit 33 is configured to separate impurities other than MMA and MMA, and performs fractional distillation using a difference in boiling point.

5 to 20 wt% of an acidic solution (sulfuric acid, nitric acid, hydrochloric acid) is added to remove substances other than the MMA and distill more pure MMA before performing fractional distillation in the fractionation section 33, And distilled at 50 to 120 ° C. Since the boiling point of MMA (Methy methacrylate) is 101 ° C, the fractionation distillation section 33 does not perform fractional distillation of MMA when the temperature is lower than 50 ° C. When the temperature is higher than 120 ° C, It is preferable to perform fractional distillation at 50 to 120 ° C.

Next, the remaining fraction after fractional distillation in the fractionation section (33) is transferred to the redistillation section (331) and re-distilled.

The re-distillation unit 331 is configured to re-distill the MMA contained in the residue remaining after fractional distillation in the fractionation unit 33.

MMA is contained in an amount of 10 to 30% by weight in the fractional distillation residue remaining in the fractionation section 33, and the distillate is re-distilled at 350 to 400 ° C. to extract 10 to 30% by weight of the MMA. The 350-400 ° C temperature range is higher than the boiling point (101 ° C) of MMA, but is heated to a high temperature to distill maximum MMA. The organic material including the MMA re-distilled at a high temperature in the redistillation unit 331 is moved along the circulation line, is liquefied in the third condenser 332, and transferred to the fractionation unit 33.

In the redistillation section 331, a residue that can not be distilled is generated, and the residue is transferred to the incinerator 333 to be removed. The incinerator 333 is communicated with the washing tower 5 so that atmospheric pollutants generated upon incineration of the residue are transferred to the washing tower 5 and the air pollution material is removed from the washing tower 5, .

Next, the gaseous MMA generated by the distillation in the fractionation part (33) is transferred to the second condenser (34). The second condenser 34 uses the same heat exchange principle as the first condenser 31 to liquefy the gaseous MMA distilled in the fractionation section 33. The MMA condensed in the second condenser (34) is transferred to the MMA storage tank (35) and stored.

Meanwhile, the MMA storage tank 35 stores the MMA transferred from the second condenser 34. The MMA stored in the MMA storage tank 35 is mixed with the MMA and the acidic substance due to the acidic solution added before fractional distillation in the fractionation unit 33. Therefore, in order to neutralize and partially remove the acidic substance stored in the MMA storage tank 35, an alkali solution is added in the alkali solution adding unit 36.

The alkali solution adding unit 36 is configured to neutralize the partially acidic substance stored in the MMA storage tank 35 together with the MMA. The alkaline solution to be added in the alkali solution adding part 36 is adjusted in consideration of the kind of the acid solution put in the fractionating part 33 and the pH (hydrogen ion concentration) measured in the MMA stored in the MMA storage tank 35, Select the solution. Examples of the alkali solution include alkaline solutions such as sodium hydroxide solution, magnesium hydroxide solution, iron hydroxide solution and potassium hydroxide solution. The alkali solution is added in consideration of the pH (hydrogen ion concentration) and the type and amount of the acidic solution put in the fractionation section 33.

The alkaline solution added in the alkali solution adding part 36 is neutralized with some acidic solution included in the MMA to form a salt. The resulting salt and impurities are transferred to the filtering part 37 do.

The filtering unit 37 is configured to remove impurities including the salt.

The MMA having the salt and the impurities removed from the filtering unit 37 is finally transferred to the MMA storage tank 38 and stored.

The final storage 38 stores the MMA transferred from the filtering unit 37 until it is shipped.

Next, the alumina recovery part 4 is heated in a calcining furnace to remove the impurities and the additive by heating the filler (alumina) in the solid state powder and the additive, which are pyrolyzed in the pyrolysis furnace 22, And then the calcined filler (alumina) is recovered from the calcining furnace.

The firing furnace 41 is configured to sinter the pulverized alumina which is pyrolyzed and transported in the pyrolysis furnace 22.

The calcination furnace 41 heats the alumina transferred through the powder feed pipe 24 from the pyrolysis furnace 22 at a high temperature of 1600 ° C to remove impurities and additives and dehydrate the calcined alumina do. The extracted alumina is transferred to the alumina storage tank 42 and stored until the product is shipped.

The apparatus 1 for recovering MMA and alumina from the waste marble according to the present invention further comprises a washing tower 5 for removing air pollutants generated during the process. Is exhausted to the atmosphere by removing air pollutants generated in the MMA recovery unit 3 and the firing furnace 41.

The washing tower 5 preferably includes a first condenser 31, a second condenser 34, a third condenser 332, an incinerator 333 and an alumina recovery unit 4 of the MMA recovery unit 3, Air pollutants generated in the firing furnace 41 of the frying pan 41 are connected to the cleaning tower 5 connected to each other to remove air pollutants. The cleaning tower 5 refers to a cleaning type dust collector, and the cleaning tower can be replaced with an air pollution prevention facility such as an electrostatic dust precipitator, a centrifugal dust collector, and a filter dust collector.

A method (FIG. 2) for recovering MMA and alumina from a waste marble using the apparatus 1 for recovering MMA and alumina from the waste marble as described above will be described below.

FIG. 2 is a process flow chart showing a method for recovering MMA and alumina from a waste marble using an apparatus for recovering MMA and alumina from a closed marble according to the present invention. FIGS. Is a process flow chart showing the process.

As shown in the drawing, the method for recovering MMA and alumina from the waste marble according to the present invention is largely accomplished through the following steps.

A method for recovering MMA and alumina from a waste marble according to the present invention comprises a pulverization step (S1) for solidifying pulp marble using a pulverizer, a pulverizing step (S1) for pulverizing pulverized coal in the pulverizing step (M3) recovery step (S3) of recovering the mixture containing gaseous MMA classified in the pyrolysis step (S2) by repeating condensation and distillation to pure MMA, and a pyrolysis step And an alumina recovery step S4 of heating powdered alumina and a small amount of additive classified in step S2 in the calcining furnace 41 to remove impurities and additives and recovering the calcined alumina. (S5) for removing air pollutants generated in the MMA recovery step (S3) and the alumina recovery step (S4) by using a cleaning tower (5), purifying the air pollutants and discharging them to the atmosphere .

First, the pulverizing step (S1) comprises the steps of powdering the waste marble by using a grinder and a powder screen (S11), a step of pulverizing the powdered waste marble And a marble storage step S12.

The pyrolysis step S2 includes a step (S21) of putting the crude marble as a pulverized powder stored in the powder storage tank (not shown) into the pyrolysis furnace 22, and a step of heating the pyrolysis furnace 22 A crude marble pyrolysis step (S22) of pyrolyzing the mixture containing gaseous MMA and alumina in solid powder state according to a difference in boiling point, a gaseous MMA transfer step (S23) of transferring the mixture containing gaseous MMA, And a solid powder state alumina transfer step (S24) for transferring the alumina in the solid powder state.

The pyrolysis step of the closed marble pyrolysis step S22 pyrolyzes the pyroclastic marble powder injected from the pyrolysis pyrolysis step S21 into pyrolysis pyrolysis, And the mixture is pyrolyzed into alumina in a solid state in the form of powder containing MMA according to the difference of boiling point by applying heat.

In the pyrolysis step (S2), the crude marble which is the inside of the pyrolysis furnace (22) is pyrolyzed in an MMA + aluminum hydroxide + additive in a solid powder state before pyrolysis, and a solid powder and a gaseous alumina (aluminum oxide, solid powder) Water (gas state) + MMA (gas state). That is, when aluminum hydroxide is heated, it is decomposed into aluminum oxide and water.

In summary, aluminum hydroxide as a filler generates aluminum oxide and water in the thermal decomposition furnace 22 by thermal decomposition, and the MMA and water are in a gaseous state due to the temperature inside the pyrolysis furnace 22 higher than the boiling point of MMA and water And alumina (aluminum oxide) becomes a residue in a solid powder state. On the other hand, these gaseous MMA-containing mixtures and solid-state alumina contain small amounts of gaseous additives and additives that maintain the powder state.

The mixture containing the gasified MMA is subjected to MMA extraction in the MMA recovery step S3 and alumina in the pyrolyzed solid powder state is subjected to alumina extraction in the alumina recovery step S4 and is introduced into the calcination furnace 41. [

The MMA transfer step S23 is a step of transferring the mixture including the MMA in the gaseous state generated in the pyrolysis step S22 through the gas feed duct 23.

The solid powder alumina transferring step S24 is a step of transferring the alumina remaining in the solid powder state in the pyrolysis step S22 through the powder feed pipe 24.

Next, the MMA recovery step (S3) is a step of repeating condensation and distillation of the mixture containing MMA classified as a gaseous state in the pyrolysis step (S2) to remove impurities and additives and extracting them with pure MMA.

The MMA recovery step (S3) includes a first condensation step (S31) of condensing the mixture containing the vaporized MMA in the pyrolysis step (S2), and a step of condensing the mixture containing the condensed MMA in an oil-water separator A distillation step (S32) of distilling water from the distilled water (S32), a fractionation distillation step (S33) of fractionating distillation by adding an acidic solution to the organic material including MMA from which the wastewater is removed in the distillation water separation step (S32) The distillation step S331 of re-distilling the residual organic material including the MMA during the distillation step S331 and the distillation step S331 of circulating the organic material including the distilled MMA to the distillation step S331, A second condensation step (S34) of condensing the gasified MMA distilled in the fractionation step (S33), a third condensation step (S34) of condensing the condensed MMA in the second condensation step (S34), a third condensation step An MMA storing step S35 for storing the MMA storing step S35, A filtering step S37 for filtering the MMA to which the alkaline solution is added; a final storage step S38 for finally storing the filtered MMA; . Meanwhile, the wastewater separated into the lower layer by the oil water separator 32 in the oil water separating step S32 is collected in the wastewater reservoir 321 and processed separately. The residue left after distillation in the redistillation unit 331 is discharged to the incinerator 333 ) To remove it.

The MMA collection step S3 will be described in more detail as follows.

First, the first condensation step (S31) is a step of condensing the mixture containing gasified MMA in the pyrolysis step (S2).

The oil-water separation step (S32) is a step of separating the mixture containing MMA condensed by the first condenser (31) into a mixture containing waste water and MMA in the first condensation step (S31).

The mixture containing the wastewater and MMA is separated by density difference and the wastewater located at the bottom can be transferred to the wastewater reservoir 321 by opening the valve provided at the bottom of the oil water separator 32. Meanwhile, the mixture containing the MMA remaining after the wastewater is transferred to the wastewater storage tank 321 is supplied to the fractionation distillation section 321 using external pumps or by the potential energy according to the height difference between the oil water separator 32 and the fractionation distillation section 33, (33).

The fractionation step (S33) is a step of adding an acidic solution to the mixture containing MMA transferred from the oil water separator and fractionally distilling the mixture at a temperature in the range of 50 to 120 ° C.

The gaseous MMA distilled in the fractionation section 33 is transferred to the second condenser 34 along the gas feed pipe provided on the fractionation section 33 and the residue not distilled in the fractionation distillation section 33 And is conveyed to the distillation section 331.

The second condensing step (S34) is a step of condensing the organic material including the MMA transferred from the fractionation unit (33) using the external cold gas to the organic material including the hot MMA.

The MMA storing step S35 is a step of storing the MMA condensed in the second condenser in the MMA storage tank 35 in the second condensing step S34.

The alkaline solution adding step (S36) is a step of adding the alkali solution to the MMA stored in the MMA storage tank in the MMA storing step.

The filtering step S37 is a step of removing salts and impurities contained in the MMA transferred in the alkaline solution adding step S36.

The MMA storing step S38 is a step of storing the MMA from which the salt and the impurities have been removed by the filtering unit 37 in the filtering step S37.

The re-distillation step (S331) is a step of re-distilling the residue not distilled in the fractionation step (S33) to a high temperature.

The third condensation step (S332) is a step of condensing the organic material including the MMA distilled and gaseous in the redistillation step (S331).

Next, the alumina recovery step (S4) is a step of heating alumina in a solid state powdered state, which is pyrolyzed in the pyrolysis step (S2) and removed water, in a firing furnace (41) to remove impurities and additives.

The alumina recovery step S4 may include the alumina calcination step S41 for heating the alumina and the impurities at a high temperature in the calcination furnace 41 to remove impurities and calcining the alumina, And an alumina storage step (S42) for storing alumina.

The alumina firing step S41 is a step of heating the alumina and the impurities transferred from the pyrolysis furnace 22 to a high temperature to remove impurities and firing the alumina.

The sintering refers to an operation of sintering the powder.

The alumina storage step S42 is a step of storing alumina in the alumina storage tank 42 from which the impurities have been removed and fired in the alumina firing step S41.

The method of recovering MMA and alumina from the waste marble using the apparatus 1 for recovering MMA and alumina from the waste marble as described above is a method in which waste marble is decomposed and recovered as MMA and alumina to be recycled By doing so, it is possible to prevent environmental pollution caused by waste marble, which is discarded, and to benefit from resource recycling.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

1: Device for recovering MMA and alumina from marble
3: MMA collection unit
4: Alumina recovery part
11:
22: pyrolysis furnace
23: Gas transfer duct
24: Powder conveyor
31: First condenser
32: Oil separator
321: waste water storage tank
33: fractionation distillation unit
331: redistillation unit
332: Third condenser
333: Incinerator
34: Second condenser
35: MMA storage tank
36: Alkali solution addition part
37: Filtering section
38: final storage
5: Washing tower
41: firing furnace
42: alumina storage tank

Claims (12)

An apparatus for recovering MMA and alumina from crude marble containing aluminum hydroxide and MMA (methyl methacrylate)
A pulverizing unit for pulverizing the waste marble using a pulverizer;
A pyrolysis furnace for pyrolyzing the pulverized crude marble in the pulverized portion;
An MMA recovering unit for recovering and recovering MMA from crude marble that is pyrolyzed in the pyrolysis furnace; And
And an alumina recovery unit for recovering and recovering alumina from crude marble which is pyrolyzed in the pyrolysis furnace,
The MMA-
A first condenser for condensing the mixture containing gaseous MMA transferred from the pyrolysis furnace, a mixture containing MMA, which is connected to the first condenser and condensed by using the first condenser, A second condenser for condensing the gaseous MMA generated from the fractionation distillation unit, a second condenser for condensing the gaseous MMA generated in the fractionation unit, and a second condenser for condensing the gaseous MMA generated in the fractionation unit, An MMA storage tank for storing the MMA condensed in the second condenser, a redistillation unit for distillation and re-distillation of the remnant remaining in the fractionation unit, and an organic material including MMA generated in the redistillation unit to circulate to the fractionation unit A third condenser, and an alkali solution adding unit for adding an alkali solution to the MMA stored in the MMA storage tank, It includes; filtering unit for removing impurities contained in the MMA are the alkali solution added
In the fractionation section,
An acidic solution is added to remove substances other than MMA, followed by distillation at a temperature of 50 to 120 DEG C,
Wherein the alkali solution adding unit includes:
Wherein the filter is provided between the MMA reservoir and the filtering unit.
The method according to claim 1,
In the pyrolysis furnace,
The temperature of the pyrolysis furnace is in the range of 200 to 600 ° C. The inside of the pyrolysis furnace is filled with nitrogen gas or inert gas so that the crude marble as the pulverized waste is not oxidized in the pyrolysis furnace, And wherein the screw rotates. The apparatus for recovering MMA and alumina from a closed vessel marble.
delete delete delete delete A method for recovering MMA and alumina from crude marble containing aluminum hydroxide and MMA,
A pulverizing step of pulverizing the waste marble using a pulverizer;
A pyrolysis step of pyrolyzing the waste crude marble powdered in the pulverizing step in a pyrolysis furnace;
An MMA recovery step of extracting and recovering MMA from crude marble which is pyrolyzed in the pyrolysis furnace; And
And recovering alumina from the crude marble which is pyrolyzed in the pyrolysis furnace and recovering the recovered alumina,
Wherein the MMA recovery step comprises:
A first condensation step of condensing the mixture containing the gasified MMA in the pyrolysis step; an oil separation step of separating the mixture containing the condensed MMA from the oil containing water using an oil separator; A second condensation step of condensing the gasified MMA distilled in the fractional distillation step; and a second condensation step of condensing the distillated and vaporized MMA in the fractional distillation step, An alkali solution adding step of adding an alkali solution to the MMA stored in the MMA storing step; a filtering step of filtering the MMA to which the alkaline solution is added; A re-distillation step of re-distilling the residue which has not been distilled in the fractional distillation step; The method for recovering the crude MMA as alumina from the basket case that the marble composed of the third condensation step of condensing the organic material including the MMA characterized by the organic materials, including ryudoen MMA in the process of circulation in the re-distillation step.
8. The method of claim 7,
In the pyrolysis step,
The temperature of the pyrolysis furnace is in the range of 200 to 600 ° C. The inside of the pyrolysis furnace is filled with nitrogen gas or inert gas so that the crude marble as the pulverized waste is not oxidized in the pyrolysis furnace, And wherein the screw rotates. A method of recovering MMA and alumina from a closed vessel marble. delete delete delete delete

Images