KR102196212B1 - A recycling equipment for the Fly Ash - Google Patents

Abstract

The present invention relates to a fly ash recycling device and, more particularly, to a fly ash recycling device capable of being utilized in various fields by vitrifying fly ash produced by incineration of household waste and producing a powder-type result and capable of preventing environmental pollution and increasing the degree of recycling by using only recyclable materials during recycling. The present invention for achieving the above object comprises: a powder supply tank for mixing fly ash generated by incineration of garbage and a mixture containing silicon dioxide (silica, SiO2) in a set ratio and supplying the mixture in a powder form; a vitrification device for vitrifying the fly ash of the mixed powder supplied from the powder supply tank; and a water bath for cooling the recycled powder produced in the vitrification device.

Description

A recycling equipment for the Fly Ash

The present invention relates to a fly ash recycling apparatus, and more particularly, by vitrifying the fly ash generated by incineration of household waste to produce a powder-like result, it can be used in various fields, and the environment It relates to a fly ash recycling device that can prevent pollution and increase the degree of recycling.

As the economy develops and industry develops, various kinds of garbage are generated at home and in society. In this way, garbage generated at homes or industrial sites is separated and collected in a certain place, then some are recycled, and the rest are landfilled or incinerated.

Among them, in the case of incineration, household waste or industrial waste is incinerated in a certain unit at a small or large-scale incinerator depending on the surrounding conditions, some of which are simply incinerated, but in many cases, mixed with incineration aids.

The greatest concern of such incineration treatment is the problem of air pollution caused by incineration, but considerable research is being conducted on the treatment of incineration ash generated after incineration.

In general, various components such as CaO, Cl, and SiO ₂ exist in incineration ash, and attempts to utilize the incineration ash as additives to manufacture construction and civil engineering materials as it are, or to utilize glassy slag discharged after melting as an aggregate are continuing. .

However, in the former case, the quality of the finished product is poor and it is a difficult method to fundamentally solve environmental hazards, and in the latter case, the glassy slag has a brittleness that is easily crushed and has a smooth surface. It is markedly separated and has a disadvantage that it is hardly used for structural purposes, and its quality is not fully guaranteed even for non-structural use, so there is much room for development in terms of recycling of resources.

In addition, depending on the country, floor materials are treated with pretreatment processes such as separating and sorting, whereas fly ash contains large amounts of heavy metals and chlorine components, so it is indispensable to melt treatment at 1300~1500℃ due to its harmfulness. However, research is being conducted to use it as a non-structural aggregate and embankment material, but there is a problem that the economic feasibility is poor due to the low-cost value.

So, in order to solve this problem, the technology described in Korean Patent Laid-Open Patent No. 10-2005-0065963 as shown in Fig. 1 has been proposed, and its technical characteristics are fly ash as the main raw material, and the basicity is in the range of 8 to 15 SiO ₂ was added in an amount of 20 to 50% by weight so that the mixture was mixed for 10 to 30 minutes by adding 0.01 to 1% by weight of color development and clarifying additives to be melted in an oxidation furnace at 1200 to 1400°C for 1 to 2 hours. After that, it is characterized in that it is discharged in the form of crushing and air cooling.

However, the technology described in Korean Patent Application Publication No. 10-2005-0065963 has the advantage of preventing the elution of heavy metals by enclosing the fly ash through vitrification, but a mixture of fly ash, SiO ₂ , color development and clarification additives in the melting furnace Since it has to be melted for 1 to 2 hours in the state of receiving the, it takes a considerable amount of time, and the resulting product is a crystal form having a size larger than a certain size, so it is difficult to use it in various fields.

In addition, since silicon dioxide (silica, SiO ₂ ) is used, there is a problem that a considerable cost is additionally expended for supply and demand of such raw materials.

Korean Patent Publication 10-2005-0065963

The present invention has been conceived to solve the above problems, and an object of the present invention is to mix powder mixed with silicon dioxide (silica, SiO ₂ ) powder as a mixture with fly ash produced by incineration of household waste in a tubular reaction tube. By vitrifying the silica to surround the fly ash while moving the reaction tube by the heat of the torch applied to the reaction tube by injection, not only can the fly ash be vitrified continuously, but also the manufacturing time can be drastically shortened. It is to provide a fly ash recycling device that can be easily used in various fields by being manufactured in a powder form.

In addition, another object of the present invention is to undergo a vitrification process by using fly ash as a mixture of waste glass or powder obtained by pulverizing waste LCD glass, so that the vitrification can be performed only with the material discarded without using silica. To provide a fly ash recycling device capable of maintaining an elution amount of heavy metals below a reference value even if the amount of mixed material to be mixed is reduced by allowing the fly ash to undergo a carbonation process.

The present invention for solving this problem is;

A powder supply tank that mixes a mixture consisting of fly ash and silicon dioxide (silica, SiO ₂ ) generated by incineration of garbage at a set ratio and supplies it in a powder form, and vitrification to vitrify the fly ash of the mixed powder supplied from the powder supply tank It is characterized in that it comprises an apparatus and a water bath for cooling the regenerated powder produced in the vitrification apparatus.

Here, the mixed material is characterized in that the waste glass or waste LCD glass is pulverized into the same particle size or small particle size as the fly ash.

In addition, the vitrification device is characterized in that it comprises a reaction unit for vitrifying the fly ash of the mixed powder, a torch for supplying a flame and mixed powder to the reaction unit, and a quantitative supply unit for supplying the mixed powder to the torch.

Here, the reaction unit is formed in a tube shape, one side is supplied with mixed powder and flame, and the other side is a reaction tube for discharging regenerated powder in which fly ash is vitrified, an insulation material provided on the outside of the reaction tube, and an outer side of the insulation material It characterized in that it consists of a protective cover provided on.

In this case, a heating wire is further provided between the reaction tube and the heat insulating material.

Meanwhile, the torch has a torch body in which a powder conveying pipe, a fuel conveying pipe, and an oxygen conveying pipe are formed inside, an oxygen pipe connected to the rear end of the torch body to supply oxygen, a fuel pipe supplying fuel, and a quantitative supply device It characterized in that it consists of a connection bracket to which is coupled, and a nozzle part connected to the front end of the torch body to spray the mixed powder and flame.

Here, the nozzle part is composed of an inner body formed in a cylindrical shape, and an outer body formed in a cylindrical shape to be spaced apart from the inner body, and the inner body communicates with the powder conveying pipe to transfer the mixed powder. Injecting to the reaction unit, the space between the inner body and the outer body is characterized in that oxygen and fuel supplied through the fuel transfer pipe and the oxygen transfer pipe are mixed to inject a flame to the reaction unit.

In this case, a stepped portion for mixing oxygen and fuel is further formed on an outer peripheral surface of the inner body.

Further, a main tank is further provided between the water bath and the vitrification device, wherein the main tank supplies the regenerated powder supplied from the vitrification device to the water bath through an outlet located below, and the mixed powder not vitrified is It is characterized in that it is recovered to the powder supply tank through a recovery port formed in the upper portion.

Here, the water bath is supplied with cooling water from an external cooling device, and a conveyor is provided inside.

Meanwhile, a drying unit for drying the mixed powder is further provided between the powder supply tank and the vitrification device.

At this time, the fly ash is characterized in that it further undergoes a carbonation process.

According to the present invention of the above-described configuration, a powder obtained by mixing silicon dioxide (silica, SiO ₂ ) powder as a mixture with fly ash generated by incineration of household waste is injected into a tube-shaped reaction tube, and the heat of the torch applied to the reaction tube By vitrifying so that silica surrounds the fly ash while moving the reaction tube by vitrification, not only can the fly ash be vitrified continuously, but also the manufacturing time can be drastically shortened, and the vitrified product can be manufactured in a powder form, making it easy for various fields. It has the effect of making it easy to use.

In addition, the present invention uses fly ash as a mixture of waste glass or waste LCD glass to undergo a vitrification process, so that vitrification can be performed only with materials discarded without using silica, thereby increasing the degree of resource recycling. In addition, even if the amount of mixed material to be mixed is reduced by allowing the fly ash to undergo a carbonation process, there is an effect of maintaining the elution amount of heavy metals below the reference value.

1 is a manufacturing process diagram for recycling conventional waste incineration fly ash.
2 is a conceptual diagram of a fly ash recycling apparatus according to the present invention.
3 is a conceptual diagram of a vitrification apparatus of a fly ash recycling apparatus according to the present invention.
Figure 4 is a conceptual diagram of a separated state of the vitrification device of the fly ash recycling apparatus according to the present invention.
5 is a conceptual diagram of a torch of the fly ash recycling apparatus according to the present invention in a separated state.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same elements in the drawings, and duplicate descriptions for the same elements are omitted. And, it should be understood that the present invention may be implemented in a number of different forms, and is not limited to the described embodiments.

2 is a conceptual diagram of a fly ash recycling apparatus according to the present invention, FIG. 3 is a conceptual diagram of a vitrification apparatus of a fly ash recycling apparatus according to the present invention, and FIG. 4 is a conceptual diagram of a state in which the vitrification apparatus of the fly ash recycling apparatus according to the present invention is separated. And FIG. 5 is a conceptual diagram of a separated state of the torch of the fly ash recycling apparatus according to the present invention.

The present invention relates to a fly ash recycling apparatus for recycling fly ash generated in the process of incineration of household waste. As shown in Figs. 2 to 5, the configuration is as follows: fly ash and silicon dioxide (silica) generated in the process of incineration of garbage. , SiO ₂ ) A powder supply tank 100 for mixing a mixed material made of a set ratio and supplying it in a powder form, a vitrification device 300 for vitrifying the fly ash of the mixed powder supplied from the powder supply tank 100, and the vitrification It consists of a water bath (water bath, 500) for cooling the regenerated powder generated in the apparatus 300.

Here, the mixed powder is formed by mixing the fly ash and the mixed material, and is attached to the outside of the fly ash in the vitrification device 300 so that the molten mixed material is wrapped so that the heavy metal contained in the fly ash does not elute to the outside. It makes it possible to use it stably.

In addition, the fly ash regeneration apparatus of the present invention cools the vitrified regenerated powder in the water bath 500 to maintain the form of silicon dioxide wrapped around the fly ash. In the vitrification apparatus 300, as will be described later, heat is directly applied to the mixed powder. The regenerated powder produced by adding it is also prepared in the form of a powder.

So, since it is supplied in the form of powder and processed into a powder form, it is possible to work continuously, so that a large amount of material can be quickly processed, and because it is manufactured in a powder form, it can be easily applied to a variety of products, thereby increasing recycling efficiency. do.

And, the mixed material used for vitrification of fly ash is made of silicon dioxide (silica, SiO ₂ ), and pure silicon dioxide (silica, SiO ₂ ) may be used, but in the present invention, silicon dioxide (silica, SiO ₂ ) is 90% The waste glass or waste LCD glass contained above is crushed and used as a mixture.

So, in the present invention, by not using pure silicon dioxide (silica, SiO ₂ ), and using powder obtained by pulverizing waste glass or waste LCD glass, it is possible to recycle waste glass and waste LCD glass resources that are discarded as well as fly ash. It is possible to prevent environmental pollution and further increase recycling efficiency.

At this time, when the waste glass or the waste LCD glass is pulverized, it is pulverized into a particle size equal to or smaller than the particle size of the fly ash so that the vitrification proceeds stably.

On the other hand, the vitrification device 300 provides a reaction unit 370 for vitrifying the fly ash of the mixed powder, a torch 320 for supplying flame and mixed powder to the reaction unit 370, and the mixed powder to the torch 320. It consists of a quantitative supply device 310 to supply.

Among them, the reaction unit 370 includes a reaction tube 372 formed in a tubular shape, an insulating material 374 provided on the outside of the reaction tube 372, and a protective cover 376 provided on the outside of the heat insulating material 374 ).

Here, the reaction tube 372 is made of a heat-resistant tube, and not only prevents the heat of the flame of the torch 320 supplied to the inside by the heat insulating material 374 from leaking to the outside, but also the external cold air When vitrification is not stably performed or severe by acting on 372, the temperature difference between the inside and the outside of the reaction tube 372 is severe, preventing the occurrence of cracks.

In this case, the protective cover 376 not only protects the reaction tube 372 from external shocks, but also blocks external cold air to increase the thermal efficiency of the reaction tube 372.

So, the reaction tube 372 is supplied with the mixed powder and flame from the torch 320 from one side, and the vitrification is stably proceeded inside, and the vitrification is performed by coating molten silicon dioxide on the surface of the fly ash as described above. This means that the vitrified regenerated powder is discharged to the other end.

In addition, although not shown in the drawing, a heating wire (not shown) may be further provided between the reaction tube 372 and the heat insulating material 374, and the edge temperature of the reaction tube 372 is adjusted to an appropriate temperature through the heating wire. You can keep it.

That is, since the heat of the flame sprayed by the torch 320 is quite high, there is a significant difference from the external temperature of the reaction tube 372, so the insulation 374 may block external cold air to some extent, but it is impossible to completely block it. Since the temperature at the edge of the reaction tube 372 is lowered, the efficiency of a stable vitrification reaction may be lowered.

Therefore, by further providing a heating wire outside the reaction tube 372, the temperature of the edge of the reaction tube 372 can be maintained at the same temperature as the temperature of the center, thereby stably inducing a vitrification reaction. It is possible to prevent damage to the reaction tube 372 due to a sudden change in temperature by preheating.

In addition, the torch 320 has a torch body 330 formed in a cylindrical shape, a connection bracket 340 connected to the rear end of the torch body 330 and connected to the quantitative supply device 310, and the torch body 330 ) Consists of a nozzle part 360 connected to the front end.

Here, in the center of the torch body 330, a powder transfer pipe 332 through which the mixed powder supplied through the quantitative supply device 310 moves is formed along the longitudinal direction, and the connection bracket 340 is at one side of the edge. A fuel transfer pipe 334 through which the fuel supplied through is moved and an oxygen transfer pipe 336 through which oxygen moves are respectively formed.

At this time, the connection bracket 340 is formed with a through hole 346 in the center to connect the screw 313 of the quantitative supply device 310 to be described later, and at the edge of the oxygen pipe to which oxygen is supplied from the outside is connected. A fuel pipe connection part 342 to which the pipe connection part 344 and a fuel pipe receiving fuel are connected is formed.

Meanwhile, the nozzle part 360 is connected to the front end of the torch body 330 to spray mixed powder and flame, and the nozzle part 360 is formed in a cylindrical shape with an inner body 361 formed in a cylindrical shape. It is formed of an outer body 364 provided to be spaced apart from the outer side of the inner body 361.

Here, the inner body 361 communicates with the powder transfer pipe 332 to inject the mixed powder to the reaction unit 370, and the space between the inner body 361 and the outer body 364 is the fuel The oxygen and fuel are mixed in communication with the transport pipe 334 and the oxygen transport pipe 336 and supplied through the fuel transport pipe 334 and the oxygen transport pipe 336.

At this time, a stepped portion 363 is further formed on the outer circumferential surface of the inner body 361, and in the process of moving oxygen and fuel supplied through the fuel transfer pipe 334 and the oxygen transfer pipe 336, the stepped portion It is mixed more easily by (363).

Accordingly, a mixture gas of fuel and oxygen is ignited through an ignition unit (not shown) separately provided in the entire nozzle unit 360 to inject a high temperature flame to the reaction unit 370, the fuel Various fuels can be used, but hydrogen can be used to prevent the generation of additional foreign matter during the combustion process.

In addition, a sealing member 350 is further provided between the nozzle part 360 and the torch body 330, and a receiving groove 338 is formed at the front end of the torch body 330 to form the sealing member 350. The posterior part is inserted.

Here, in the center of the sealing member 350, an auxiliary powder transfer pipe 352 is formed to be in communication with the powder transfer pipe 332 so as to penetrate back and forth, and all of the auxiliary powder transfer pipe 350 has the inner body ( A first insertion protrusion 362 protruding at the rear portion of the 361) is inserted and installed, and a male screw is formed on the outer circumferential surface of the first insertion protrusion 362 to be screwed into the auxiliary powder transfer pipe 352 of the sealing member 350 It is firmly bonded by bonding.

At this time, a second insertion protrusion 358 is protruded on all of the sealing member 350 and is inserted into the rear portion of the outer body 364 so that the inner body 361 and the outer body 364 are spaced apart a predetermined distance. It is installed, and the sealing member 350 has an auxiliary fuel transfer pipe 354 and an auxiliary oxygen transfer pipe 356 formed to communicate with the fuel transfer pipe 334 and the oxygen transfer pipe 336, respectively, and the inner body 361 Oxygen and fuel are supplied to the space between the and the outer body 364.

Meanwhile, a cylindrical coupling member 366 is provided outside the outer body 364, and a flange 365 is formed on the outer peripheral surface of the rear end of the outer body 364 and supported at the rear end of the coupling member 366 The jaw 367 is formed to press the outer body 364 backward.

Here, a male screw is formed on the rear outer circumferential surface of the coupling member 366 and a female screw is formed on all inner circumferential surfaces of the torch body 330, and the coupling member 366 is screwed to the entire torch body 330. The outer body 364 is firmly fixed.

At this time, the length of the flame and the temperature of the flame can be adjusted by adjusting the flow rate of the fuel and oxygen supplied through the torch 300 and the mixing ratio of the fuel and oxygen, and thus manufactured through vitrification according to the length and temperature of the flame. Since the size of the particles of the recycled powder is changed, the size of the particles of the recycled powder produced by controlling the length and temperature of the flame according to the item to be recycled is controlled.

In addition, the quantitative supply device 310 coupled to the rear of the torch 320 includes a supply body 311 formed in a cylindrical or polygonal shape, and a hollow 312 formed to penetrate back and forth in the center of the supply body 311 ) And a screw 313 provided to be rotatable inside the hollow 312 and a motor 314 installed at the rear of the supply body 311 to control the rotation of the screw 313.

Here, at one side of the supply body 311, an inlet 315 connected through the powder supply tank 100 and the supply line 102 is formed to receive the mixed powder, and the screw 313 is at a constant speed. By rotating the torch 320 located in the front, a certain amount can be continuously supplied at a constant speed.

Of course, it is natural that the amount of mixed powder supplied can be adjusted by controlling the rotational speed of the screw 313 according to the situation.

Meanwhile, a main tank 400 is further provided between the water bath 500 and the vitrification device 300, the main tank 400 being connected to the end of the reaction unit 370 constituting the vitrification device 300 And supplied with vitrified recycled powder.

Here, the size of the main tank 400 may be variously formed depending on the amount of fly ash for regeneration. If the amount is small, it may be formed in a small size to connect only one vitrification device 300, or the amount of regeneration may be In many cases, it may be formed to be large so that a plurality of vitrification devices 300 can be connected.

At this time, the recycled powder supplied from the vitrification device 300 is supplied to the water bath 500 through an outlet 410 located under the main tank 400, and vitrification is not possible in the vitrification device 300. The unmixed powder is recovered to the powder supply tank 100 through a recovery line 104 connected to a recovery port 420 formed on the top of the main tank 400.

That is, when vitrification proceeds through the vitrification device 300, the molten silicon dioxide is coated on the outside of the fly ash, so that the particle size increases and moves to the lower side of the main tank 400, and the fly ash and The mixed material is naturally separated by moving upward due to the high temperature inside the main tank 400 due to its small particle size.

In addition, the water bath 500 provided under the main tank 400 is filled with cooling water, and the cooling water is continuously supplied through a cooling device 510 provided separately.

Here, a conveyor is provided inside the water bath 500 to move the cooled regenerated powder to the drying device 600 located at the side, and quickly dried by hot air supplied from the drying device 600. .

Meanwhile, blowers 103 and 105 are respectively provided in the supply line 102 and the recovery line 104 connected to the powder supply tank 100 to supply or collect the mixed powder.

Here, the fly ash regeneration device of the present invention is provided with a control device 900 to control each component, and a gas supply device 810 for supplying fuel and oxygen to the vitrification device 300 is provided on one side to provide a stable Gas is supplied to the gas supply device 810, and an electrolysis device 830 for generating hydrogen and oxygen by electrolyzing water may be further provided on the side of the gas supply device 810.

At this time, a dust collector 820 is further provided at one side of the recovery line 104 to filter foreign substances contained in the mixed powder to be recovered, and the mixed powder to the vitrification device 300 through the supply line 102 When supplying, a drying unit 200 is further provided in the supply line 102 to completely remove moisture from the mixed powder supplied to the vitrification device 300 so that vitrification can be stably performed.

The degree of dissolution of heavy metals was tested on the regenerated powder vitrified using the fly ash recycling apparatus of the present invention described above through a dissolution test.

Here, the test method is a method used by the US Environmental Protection Agency (US EPA), etc., and a dissolution test was performed through TCLP (Toxicity characteristic leaching procedure), one of the most widely used dissolution test methods, and the TCLP dissolution test method has a particle diameter of 95 mm. The filtrate collected after mixing 100g or more of the following samples so that the ratio of sample: solvent is 1:20, rotating through a stirring device at a rate of 30 times per minute for 18 hours, and filtering using a 0.6~0.8㎛ membrane filter Analyze the pollutant resistance.

At this time, there are two types of solvents used in the TCLP dissolution test method, and the type of solution varies depending on the pH of the waste resource. When the pH of the waste resource is 5 or higher, acetic acid solution (pH 288) is used, and when the pH is 5 or less, acetic acid buffer solution (pH 4.93) is used as the solvent.

First, the fly ash generated in the process of incineration of household waste was collected and analyzed using the TCLP dissolution test method described above, and the results shown in [Table 1] below were derived.

Pb Cu CD Cr ⁺⁶ Hg As CN Cl LOI(%) Ministry of Environment standards 1.0
Within 1.0
Within 0.10
Within 0.10
Within 0.003
Within 0.50
Within 0.20
Within 250
Within 5.0
Below Elution
(mg/L) 112.7 0.32 5.2 0.023 0.086 0.066 N.D 685 6.7 Satisfaction X O X O X O O X X

Then, the fly ash generated in the process of incineration of household waste was collected and applied to the fly ash recycling apparatus of the present invention, and then analyzed using the above-described TCLP dissolution test method, and the results as shown in [Table 2] below were derived. .

Pb Cu CD Cr ⁺⁶ Hg As CN Cl LOI(%) Ministry of Environment standards 1.0
Within 1.0
Within 0.10
Within 0.10
Within 0.003
Within 0.50
Within 0.20
Within 250
Within 5.0
Below SPL1
Elution
(mg/L)
106.0
0.280
4.80
0.018
0.125
ND
ND
68.0
1.3 SPL2
Elution
(mg/L)
101.9
0.300
5.50
0.015
0.095
ND
ND
42.7
0.9 SPL3
Elution
(mg/L)
110.5
0.220
5.30
0.022
0.077
ND
ND
72.8
0.7 Average
Elution
(mg/L)
106.1
0.267
5.20
0.018
0.099
ND
ND
61.2
1.0

On the other hand, when manufacturing the regenerated powder using the fly ash regeneration device of the present invention, in the case of the regenerated powder prepared by primarily 90 parts by weight: 10 parts by weight of the mixing ratio of the fly ash and silicon dioxide, the following [Table 3] and The same result was obtained.

Here, according to the above-described experimental results, in the dissolution test of the result of applying the fly ash not mixed with silicon dioxide to the fly ash regeneration apparatus of the present invention, heavy metals excluding Pb, Cd, and Hg are eluted below the environmental regulations, so they are not separately indicated. In the case of loss on ignition (LOI), the unburned carbide contained in the fly ash is burned and reduced in the vitrification device 300, and thus, it satisfies the regulation value for the reduction in ignition by the Ministry of Environment at all component ratios, so it is not separately indicated.

Pb CD Hg Ministry of Environment standards Within 1.0 Within 0.10 Within 0.003 SPL1 elution amount (mg/L) 25.9 0.74 0.004 SPL2 elution amount (mg/L) 44.4 0.55 0.007 SPL3 elution amount (mg/L) 29.7 0.19 0.010 Average dissolution amount (mg/L) 33.3 0.49 0.007

As described in [Table 3], when looking at the standards of the Ministry of Environment and the derived amount of elution, all of Pb, Cd, and Hg exceeded the standard values.

In the second experiment, in the case of the regenerated powder prepared by using the mixing ratio of fly ash and silicon dioxide as 80 parts by weight: 20 parts by weight, the results as shown in Table 4 below were derived.

Pb CD Hg Ministry of Environment standards Within 1.0 Within 0.10 Within 0.003 SPL1 elution amount (mg/L) 7.3 0.009 0.001 SPL2 elution amount (mg/L) 6.9 0.013 N.D SPL3 elution amount (mg/L) 7.7 0.018 N.D Average dissolution amount (mg/L) 7.3 0.013

Looking at the standards of the Ministry of Environment and the derived amount of elution as described in [Table 4], the standard values were exceeded in Pb, but the standard values were satisfied in Cd and Hg.

In the third experiment, in the case of the regenerated powder prepared with the mixing ratio of fly ash and silicon dioxide in 70 parts by weight: 30 parts by weight, the results as shown in Table 5 below were derived.

Pb CD Hg Ministry of Environment standards Within 1.0 Within 0.10 Within 0.003 SPL1 elution amount (mg/L) 0.48 N.D N.D SPL2 elution amount (mg/L) 0.35 N.D N.D SPL3 elution amount (mg/L) 0.32 N.D N.D Average dissolution amount (mg/L) 0.38

As described in [Table 5], when looking at the standards of the Ministry of Environment and the derived amount of elution, Pb was eluted within the standard value, and Cd and Hg were not detected, so all of the standard values were satisfied.

And, in the fourth experiment, in the case of the regenerated powder prepared with the mixing ratio of fly ash and silicon dioxide as 60 parts by weight: 40 parts by weight, the results as shown in Table 6 below were derived.

Pb CD Hg Ministry of Environment standards Within 1.0 Within 0.10 Within 0.003 SPL1 elution amount (mg/L) 0.089 N.D N.D SPL2 elution amount (mg/L) 0.077 N.D N.D SPL3 elution amount (mg/L) 0.041 N.D N.D Average dissolution amount (mg/L) 0.069

As described in [Table 6], when examining the standards of the Ministry of Environment and the derived amount of elution, Pb was eluted within the standard value, and Cd and Hg were not detected, so all of the standard values were satisfied.

Therefore, when using the fly ash recycling apparatus of the present invention, when the mixing ratio of fly ash and silicon dioxide is 70 parts by weight: 30 parts by weight, it is possible to manufacture recycled powder in which all heavy metals satisfy the standards of the Ministry of Environment.

And, in the 5th experiment, fly ash that has undergone a carbonation process was used. The carbonation process is to induce an accelerated carbonation reaction by injecting carbon dioxide (CO ₂ , purity over 99%) into the fly ash to stabilize harmful heavy metals. L/S) was 1:0.5 and accelerated carbonation was performed for 6 hours.

In the case of the regenerated powder prepared by setting the mixing ratio of the fly ash and silicon dioxide through the carbonation process to 90 parts by weight: 10 parts by weight, the results as shown in Table 7 below were derived.

Pb CD Hg Ministry of Environment standards Within 1.0 Within 0.10 Within 0.003 SPL1 elution amount (mg/L) 0.43 0.44 0.011 SPL2 elution amount (mg/L) 0.59 0.59 0.008 SPL3 elution amount (mg/L) 0.33 0.35 0.009 Average dissolution amount (mg/L) 0.45 0.46 0.009

As described in [Table 7], when examining the standards of the Ministry of Environment and the derived amount of elution, Pb satisfies the standard value, but exceeded the standard value for Cd and Hg.

And, in the sixth experiment, in the case of the recycled powder prepared by using a mixing ratio of 80 parts by weight to 20 parts by weight of the fly ash and silicon dioxide undergoing the carbonation process, the results as shown in Table 8 below were derived.

Pb CD Hg Ministry of Environment standards Within 1.0 Within 0.10 Within 0.003 SPL1 elution amount (mg/L) 0.085 0.025 0.001 SPL2 elution amount (mg/L) 0.090 0.011 N.D SPL3 elution amount (mg/L) 0.054 0.021 0.001 Average dissolution amount (mg/L) 0.076 0.019

As described in [Table 8], when examining the standards of the Ministry of Environment and the derived amount of elution, Pb, Cd, and Hg all satisfied the standard values.

Therefore, after going through the process of carbonation of fly ash, when vitrifying through the fly ash recycling apparatus of the present invention, 20 parts by weight of silicon dioxide can be used, so less silicon dioxide is used, so that when silicon dioxide itself is used as a mixture, It is possible to significantly reduce the cost of silicon dioxide.

Of course, as described above, when waste glass or waste LCD glass containing 90% or more of silicon dioxide is pulverized and used as a mixed material, vitrification can be performed only with materials that are discarded without using silicon dioxide (silica). Can be increased.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the scope substantially equal to the embodiment of the present invention. It is possible to implement various modifications by those of ordinary skill in the art to which the present invention belongs within the scope not departing from.

The present invention relates to a fly ash recycling apparatus, and more particularly, by vitrifying the fly ash generated by incineration of household waste to produce a powder-like result, it can be used in various fields, and the environment It relates to a fly ash recycling device that can prevent pollution and increase the degree of recycling.

100: powder supply tank 200: drying unit
300: vitrification device 310: quantitative supply device
320: torch 330: torch body
340: connection bracket 350: sealing member
360: nozzle unit 370: reaction unit
400: main tank 500: water bath
600: drying device 810: gas supply
820: dust collector 830: electrolysis device
900: control device

Claims (12)

A powder supply tank that mixes a mixture of fly ash and silicon dioxide (silica, SiO ₂ ) generated by incineration of garbage at a set ratio and supplies it in a powder form;
A vitrification device for vitrifying the fly ash of the mixed powder supplied from the powder supply tank,
It consists of a water bath (water bath) for cooling the regenerated powder produced in the vitrification device,
The vitrification device includes a reaction unit for vitrifying the fly ash of the mixed powder, a torch supplying a flame and mixed powder to the reaction unit, and a quantitative supply unit supplying the mixed powder to the torch,
The reaction unit is provided with a reaction tube formed in a cylindrical shape, and is supplied with mixed powder and flame from one side of the reaction tube, and discharges regenerated powder in the form of a powder obtained by vitrifying the mixed powder by flame to the other side,
A main tank is further provided between the water bath and the vitrification device,
In the main tank, the recycled powder supplied from the vitrification device is supplied to a water bath through an outlet located below,
Fly ash recycling apparatus, characterized in that the mixed powder not vitrified is recovered to the powder supply tank through a recovery port formed thereon.
The method of claim 1,
The mixed material is a fly ash recycling apparatus, characterized in that the waste glass or waste LCD glass is pulverized into the same particle size or small particle size as the fly ash.
delete The method of claim 1,
The reaction unit and the reaction tube,
Insulation material provided on the outside of the reaction tube,
Fly ash recycling apparatus, characterized in that consisting of a protective cover provided on the outside of the insulating material.
The method of claim 4,
Fly ash regeneration device, characterized in that the heating wire is further provided between the reaction tube and the heat insulating material.
The method of claim 1,
The torch has a torch body in which a powder conveying pipe, a fuel conveying pipe, and an oxygen conveying pipe are formed inside,
A connection bracket connected to the rear end of the torch body to connect an oxygen pipe to supply oxygen, a fuel pipe to supply fuel, and a quantitative supply device,
Fly ash recycling apparatus comprising a nozzle part connected to the front end of the torch body and spraying the mixed powder and flame.
The method of claim 6,
The nozzle part has an inner body formed in a cylindrical shape,
It consists of an outer body formed in a cylindrical shape and provided to be spaced apart from the outer side of the inner body,
The inner body is in communication with the powder transfer pipe to inject the mixed powder to the reaction unit,
A fly ash regeneration device, characterized in that the space between the inner body and the outer body is mixed with oxygen and fuel supplied through the fuel transfer pipe and the oxygen transfer pipe to inject a flame to the reaction unit.
The method of claim 7,
Fly ash recycling apparatus, characterized in that the stepped portion for mixing oxygen and fuel is further formed on the outer peripheral surface of the inner body.
delete The method of claim 1,
The water bath receives cooling water from an external cooling device,
Fly ash recycling apparatus, characterized in that the inside is provided with a conveyor.
The method of claim 1,
Fly ash recycling apparatus, characterized in that the drying unit for drying the mixed powder is further provided between the powder supply tank and the vitrification device.
The method of claim 1,
The fly ash recycling apparatus, characterized in that the fly ash further undergoes a carbonation process.

Images