KR20240047501A - Recycling resource system using organic waste - Google Patents

Abstract

The method of producing building materials using landfill waste according to the present invention uses ash, inorganic mixtures, and sewage sludge from incinerated landfill waste as materials used in the production of building materials, and reuses landfill waste and wastewater, which are recent environmental problems, to eliminate them. This has the effect of preventing air pollution and significantly increasing thermal energy efficiency by reusing waste heat generated during the production process rather than discharging it to the outside.

Description

Construction material production method using landfill waste { Recycling resource system using organic waste }

The present invention relates to a method for producing construction materials using landfill waste. More specifically, the ash, inorganic mixture, and sewage sludge obtained by incinerating landfill waste during the production of construction materials so that landfill waste and wastewater, which are environmental problems, can be reused and eliminated. This relates to a method of producing building materials using landfill waste that uses landfill waste as a material and circulates and reuses the initial waste heat generated during the process internally rather than discharging it to the outside to prevent air pollution generated during the production process and increase thermal energy efficiency. .

In general, some of the various general waste and landfill waste generated at industrial sites are incinerated, and most of the rest is buried in the ground.

However, landfilling of waste has not been a fundamental solution, and the landfills that can bury the ever-increasing amount of waste have almost reached saturation, and landfilling of waste does not rot or decompose and remains as a permanent pollutant. It is causing destruction of the natural environment.

In addition, until now, waste generated and brought in from homes and industrial sites was not classified into household waste, construction waste, organic waste, and domestic waste, but was incinerated and buried, thereby reducing the odor, leachate, and dust contained in the waste. Pollutants such as pollutants also cause contamination of the environment around landfill sites.

Accordingly, a device for incinerating waste was developed to minimize landfill waste, and Domestic Patent No. 10-1175296 was disclosed as a prior technical document for this.

In this conventional waste incineration device, waste is injected into the combustion chamber, then goes through a process of drying, combustion, and re-combustion on the grate that forms the bottom of the combustion chamber, and is discharged as ash through the outlet. Only the ash remaining after combustion is buried in a landfill to fill the existing landfill amount. was drastically reduced.

However, conventional waste incineration devices also have the problem of landfilling waste, that is, ash, so they cannot completely prevent contamination, and the buried ash alone contaminates the soil of the landfill.

In addition, the waste heat generated from the conventional waste incineration device, that is, the remaining heat after use, is transferred to the boiler and reused only to the extent of heating water, and is then discharged to the outside and discarded, compared to the fuel that heats the inside of the incinerator to a high temperature. There was a problem of wasting energy by discarding the waste heat rather than using it efficiently.

The present invention was created to solve the problems of the prior art as described above. The purpose of the present invention is to use ash, inorganic mixture, and sewage sludge from incinerated landfill waste as materials used in the production of building materials, which has recently been environmentally friendly. A construction material production method using landfill waste that can eliminate problems by reusing landfill waste and wastewater, prevent air pollution by reusing waste heat generated during the production process without discharging it to the outside, and significantly increase thermal energy efficiency. In providing.

The method of producing construction materials using landfill waste according to the present invention to achieve the above purpose is a production method of producing construction materials such as heat insulators and lightweight aggregates using landfilled waste, and the waste is placed on a conveyor transported in one direction. A waste importing step; A metal sorting step of sorting metals present inside the waste transported after the waste loading step using a magnetic separator; A compression cutting step of moving the waste from which metals have been removed after the metal selection step to a compression cutting device and cutting it to a predetermined size; A kiln drying step of moving the cut waste into the inside of a kiln dryer and drying it at a set temperature to remove moisture from the cut waste after the compression cutting step; An incineration step of moving the dried waste after the kiln drying step to a multi-layer incinerator and incinerating it into ash; A first building material mixing step of supplying the ash and the inorganic mixture to a mixer at a predetermined ratio after the incineration step and mixing them into a building mixed material; A second building material mixing step of supplying the building mixture and sewage sludge dried to a moisture content of 25% to 35% to a mixer and mixing them into a clay-based building mixture after the first building material mixing step; A press molding step of molding the clay-based building material mixture into a predetermined shape through a press device after the second building material mixing step; It is characterized in that it consists of a firing step in which the molded clay building mixture material after the press molding step is moved to a firing kiln and fired at a set temperature to produce building materials.

The waste heat generated during the incineration step is moved to the inside of the mixer through the waste heat transfer pipe to reuse the waste heat, and the waste heat used in the mixer is moved to the inside of the firing kiln to reuse the waste heat. It is characterized by further including a waste heat reuse step in which the generated waste heat is reused by moving it back to the multi-layer incinerator.

The magnetic separator includes a sorting base installed at a predetermined height above the conveyor, a magnet attached to the lower surface of the sorting base with a size equal to the width of the conveyor, and a magnet wrapped around the outer peripheral surface of the sorting base and attached to the magnet. It is characterized by consisting of a rotating belt that moves the metal in one direction, and a collection hopper that collects the metal that falls when the magnetic force is released at the bottom of the conveyor.

The multi-layer incinerator includes an upper incinerator where the waste is supplied upward and then incinerated at a predetermined temperature to produce ash, and the waste is supplied in one direction to the lower part of the upper incinerator and then incinerated at a predetermined temperature to generate ash. It is characterized by consisting of a lower incineration section.

The upper incineration unit includes an upper body with a space formed inside, an upper hopper through which the waste is supplied to the upper part of the upper main body, an upper burner that generates heat in the lower part of the upper main body, and the waste inside the upper main body. It consists of an upper grate that drops to the bottom when incinerated to a predetermined size after it is seated, and an upper discharge passage through which ash generated after incineration on one side of the upper body is discharged to the outside; The upper center of the upper grate is characterized in that a decomposition protrusion protruding upward is formed so that the supplied waste flows down and is dispersed on both sides.

The lower incinerator includes a lower body with a space formed inside, a lower hopper through which the waste is supplied to one side of the lower body, a lower burner that generates heat in the lower part of the lower body, and the lower body inside the lower body. It consists of a lower grate that causes the waste to fall to the bottom when it is settled and incinerated to a predetermined size, and a lower discharge passage through which the ash generated after incineration is discharged to the outside on one side of the lower body; The lower grate is characterized by a decomposition slope inclined from one side to the other side so that the supplied waste flows down and disperses in the opposite direction to which it is supplied.

The inorganic mixture is mixed with 67 to 83 parts by weight of clay, 100 to 133 parts by weight of zeolite, and 33 to 50 parts by weight of stone for 100 parts by weight of the ash; The stone is characterized in that it is formed of any one of mica, porcelain, or red clay.

As such, the method of producing building materials using landfill waste according to the present invention has the following effects.

First, the materials used in the production of building materials are produced using ash, inorganic mixtures, and sewage sludge from incinerated landfill waste, thereby reducing production costs by using landfill waste and wastewater, which are recent social problems, as production materials for building materials. In addition to saving, environmental pollution can be prevented,

Second, by producing materials used in the production of building materials using ash from incinerated landfill waste, inorganic mixtures, and sewage sludge, the water used in mixing materials for producing building materials is replaced with sewage sludge. Reduces raw materials for water consumption,

Third, by connecting waste heat transfer pipes to each process where heat is used, the efficiency of thermal energy is greatly increased by reusing the waste heat initially generated where heat is used, and harmful gases generated when waste is incinerated are discharged to the outside along with the waste heat. Air pollution can be prevented by blocking emissions in advance.

Fourth, by forming a decomposition protrusion protruding upward on the upper part of the upper grate and forming a decomposition slope inclined in one direction on the upper part of the lower grate, agglomeration of waste is achieved by spraying the waste (W) supplied in an agglomerated state. This has the effect of preventing a decrease in incineration efficiency.

1 is a process diagram showing the method for producing building materials according to the present invention;
Figure 2 is a process concept diagram showing the construction material production method according to the present invention;
Figure 3 is a process diagram showing the waste heat reuse step according to the present invention,
Figure 4 is a side view showing the magnetic separator according to the present invention;
Figure 5 is an internal cross-sectional view showing a multi-layer incinerator according to the present invention;
Figure 6 is an internal cross-sectional view showing the upper incineration unit according to the present invention,
Figure 7 is an internal cross-sectional view showing the lower incineration unit according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings.

The construction material production method using landfill waste according to the present invention is a production method of producing construction materials (D) such as heat insulators and lightweight aggregates using landfill waste (W), as shown in Figures 1 and 2. A waste loading step (S10) of loading the waste (W) into a conveyor (C) that is transported in one direction; A metal selection step (S20) in which metals present inside the waste (W) transferred after the waste loading step (S10) are selected through a magnetic separator (10); A compression cutting step (S30) of moving the waste (W) from which the metal has been removed after the metal selection step (S20) to the compression cutting device (20) and cutting it into a predetermined size; A kiln drying step (S40) of moving the cut waste (W) into the inside of a kiln dryer (30) and drying it at a set temperature in order to remove moisture from the waste (W) after the compression cutting step (S30); An incineration step (S50) in which the dried waste (W) after the kiln drying step (S40) is moved to a multi-layer incinerator (40) and incinerated into ash; After the incineration step (S50), the ash and the inorganic mixture (B) are supplied to the mixer (50) at a predetermined ratio and mixed into the building mixture material (B1) (S60); After the first building material mixing step (S60), the building mixture material (B1) and the sewage sludge (H) dried to a moisture content of 25% to 35% are supplied to the mixer 50 to produce a clayey building mixture (B2). A second building material mixing step (S70) of mixing with; After the second building material mixing step (S70), a press forming step (S80) of molding the clay-based building mixed material (B2) into a predetermined shape through a press device (60); After the press forming step (S80), the molded clay-based building mixture (B2) is moved to a firing kiln (70) and fired at a set temperature to produce a building material (D) (S90).

On the other hand, the compression cutter 20 is a device equipped with two general cutting blades. The waste (W) flows in between the two cylindrical cutting blades and includes a pair of cylindrical cutting blades arranged in parallel in one direction so that the waste (W) is cut to a predetermined size. It is preferable that a blade (not shown), a driving device that rotates the blade, and a collection bin (not shown) that collects the cut waste (W) are provided at the bottom.

In addition, the kiln dryer 30 is a cylindrical rotating continuous firing kiln consisting of a general rotary kiln type. When the waste (W) is supplied to one side of a horizontally laid cylinder, the cylinder rotates and moves in one direction, and the temperature inside is maintained. By raising, transport and drying can be performed at the same time.

Here, the kiln dryer 30 is manufactured to maintain an internal temperature of 70 to 80 degrees and have a length of 20 to 30 M, and is preferably provided with a cylindrical net (hole size 10 mm to 15 mm) inside which vibration is generated by a vibrator. .

In addition, the mixer 50 is a general rotary mixer consisting of a cylindrical body and a mixing blade rotating inside it to mix a plurality of incoming materials, and the press device 60 has molds for building materials of various shapes. It is installed and the clay-based building mixture (B2) is press-molded into a predetermined shape.

In addition, the firing kiln 70 produces building materials by firing the press-molded building mixture material (B2) at a temperature of 1150°C to 1180°C for 3 hours and 30 minutes to 4 periods, and adjusting the temperature to 1150°C to 1200°C. By firing, ceramic building materials can also be produced.

Meanwhile, it is desirable to move to each stage through a conveyor device.

In addition, the waste heat generated during the incineration step (S50) is moved to the inside of the mixer 50 through the waste heat transfer pipe 80 as shown in FIG. 3 to reuse the waste heat, and the waste heat used in the mixer 50 is The waste heat is reused by moving it to the inside of the firing kiln (70), and the waste heat used in the firing kiln (70) is moved back to the multi-layer incinerator (40) to reuse the generated waste heat (S51). More included.

Meanwhile, it is preferable that the waste heat transfer pipe 80 is connected to various stages and devices in which heat can be used other than the connected stages to reuse the waste heat.

And, as shown in FIG. 4, the magnetic separator 10 includes a sorting base body 11 installed at a predetermined height on the upper part of the conveyor C, and a conveyor C on the lower surface of the sorting base body 11. ), a magnetic 12 attached to a size equal to the width of ), a rotating belt 13 that is wound around the outer peripheral surface of the sorting base body 11 and moves the metal attached to the magnetic 12 in one direction, and the conveyor ( It consists of a collection hopper 14 that collects metal that falls when the magnetic force is released at the bottom of C).

In addition, as shown in FIG. 5, the multi-layer incinerator 40 includes an upper incinerator 41 in which the waste W is supplied upward and then incinerated at a predetermined temperature to generate ash, and the upper The waste (W) is supplied to the lower part of the incinerator 41 in one direction and is then incinerated at a set temperature to produce ash. It consists of a lower incinerator 42.

Meanwhile, the upper incineration section 41 is seated and closely attached to the upper surface of the lower incineration section 42 and is formed so that heat from the upper incineration section 41 and the lower incineration section 42 can be transferred and shared. desirable.

Here, the upper incineration unit 41 includes an upper body 411 with a space formed inside as shown in FIG. 6, and an upper hopper 412 through which the waste (W) is supplied to the upper part of the upper body 411. ) and an upper burner 413 that generates heat in the lower part of the upper main body 411, and the waste W is seated inside the upper main body 411 and then falls to the lower part when incinerated to a predetermined size. It consists of an upper grate 414 and an upper discharge path 415 through which ash generated after incineration on one side of the upper body 411 is discharged to the outside.

At this time, a decomposition protrusion 414a is formed at the upper center of the upper grate 414 so that the supplied waste W flows down and is dispersed on both sides.

In addition, the lower incineration unit 42 includes a lower body 421 with a space formed therein as shown in FIG. 7, and a lower hopper ( 422), a lower burner 423 that generates heat in the lower part of the lower body 421, and the waste W is seated inside the lower body 421 and when incinerated to a predetermined size, it falls to the bottom. It consists of a lower grate 424 and a lower discharge passage 425 through which ash generated after incineration on one side of the lower body 421 is discharged to the outside.

At this time, the lower grate 424 is formed with a decomposition slope 424a inclined from one side to the other so that the supplied waste W flows down and disperses in the opposite direction to which it was supplied.

And, the inorganic mixture (B) is mixed with 67 to 83 parts by weight of clay, 100 to 133 parts by weight of zeolite, and 33 to 50 parts by weight of stone with 100 parts by weight of ash; The stone is formed of any one of mica, porcelain, or red clay.

The operation of the construction material production method using landfill waste according to the present invention, which has the above configuration, is as follows.

In the method of producing construction materials using landfill waste according to the present invention, as shown in FIGS. 1 and 2, the waste (W) is brought in to a conveyor (C) that is transported in one direction, and the waste (W) present in the brought in waste (W) is By proceeding to the metal selection step (S20) in which metals are magnetically filtered out, metal components are prevented from being included inside building materials. When producing building materials, metals are included and the mixing ratio is lowered, or metal components are included during firing and incineration. This problem can be prevented in advance.

Thereafter, the waste (W) from which the metal has been removed is moved to the compression cutting device (20) and a compression cutting step (S30) is performed in which it is cut into a predetermined size, thereby cutting the indiscriminately large landfill waste into a size suitable for the process and processing it later. In addition to making it easier to transport, when incinerated at high temperatures, the heat transfer rate is improved, which also increases incineration efficiency.

Then, by proceeding with the kiln drying step (S40) of removing moisture from the waste (W) cut to a predetermined size, the horizontally laid cylindrical kiln dryer (30) is installed at an inclination of 25 to 35 degrees and then rotated to allow the inflow. The waste (W) is rotated and moved in one direction.

At this time, by introducing hot air of 70 to 80 degrees into the kiln dryer 30, the waste W can be moved and dried through the hot air.

Next, the dried waste (W) is moved to the multi-layer incinerator (40) to proceed with the incineration step (S50), so that the dried waste (W) is incinerated into ash to be used in the next process.

And, the first building material mixing step (S60) in which incinerated ash and inorganic mixture (B) are mixed at a set ratio, and the second building material mixing step (S60) in which the building mixture (B1) and sewage sludge (H) are mixed. By proceeding with the material mixing step (S70), clay-based building mixture (B2), that is, building mixture (B2) with soft properties, is created, which can be easily molded into the desired shape during subsequent press molding. .

At this time, it is additionally used to use the discarded sewage sludge (H) by including sewage sludge (H) dried to a moisture content of 25% to 35% to facilitate mixing in the second building material mixing step (S70). Since separate water is not required, the production cost is lowered and environmental pollution can be prevented by recycling sewage sludge.

In addition, the desired building material (D) can be produced through a press forming step (S80) in which the mixed clay-based building mixture (B2) is pressed into a predetermined shape and a firing step (S90) in which the mixed clay building mixture material (B2) is pressed into a predetermined shape.

At this time, the waste heat generated during the incineration step (S50) is moved to the inside of the mixer 50 through the waste heat transfer pipe 80 as shown in FIG. 3 to reuse the waste heat, and the waste heat used in the mixer 50 is The waste heat is reused by moving it to the inside of the firing kiln (70), and the waste heat used in the firing kiln (70) is moved back to the multi-layer incinerator (40) to reuse the generated waste heat (S51). By further including it, the waste heat generated in the first incineration step (S50) is supplied to the subsequent heat use step, thereby increasing thermal efficiency and reducing air pollution by reusing the generated waste heat in subsequent processes rather than disposing it to the outside atmosphere. It can be prevented.

Meanwhile, as shown in FIG. 4, the magnetic separator 10 pulls only metal through the magnetic 12 when the waste W moving on the conveyor C enters the position of the sorting base body 11. Sorting is performed by pulling, and then the rotating belt 13 is rotated in one direction, allowing metals that have escaped the position of the magnetic 12 to fall into the collection hopper 14 and be collected.

In addition, as shown in FIG. 5, the multi-layer incinerator 40 includes an upper incinerator 41 in which the waste W is supplied upward and then incinerated at a predetermined temperature to generate ash, and the upper The waste (W) is supplied to the lower part of the incineration unit 41 in one direction and is then incinerated at a set temperature to create ash, which consists of a lower incineration unit 42, thereby forming two incineration units to improve incineration efficiency. can be significantly improved.

Here, a disassembly protrusion 414a protruding upward is formed at the upper center of the upper grate 414, so that the waste W falling from the upper hopper 412 collides with the disassembly protrusion 414a. By dispersing to both sides, it is possible to prevent incineration efficiency from being reduced due to agglomeration of waste (W).

In addition, a decomposition slope (424a) is formed on the lower grate (424) inclined from one side to the other, so that when the supplied waste (W) is seated on the decomposition slope (424a), it flows down in one direction due to the inclination and forms a lump. By dispersing the parts, it is possible to prevent incineration efficiency from being reduced due to agglomeration of waste (W).

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the invention as claimed in the claims. Of course, such changes are within the scope of the claims.

<Explanation of symbols for main parts of the drawing>
ash : ash W : waste
D: Construction material C: Conveyor
H: Sewage sludge B: Inorganic mixture
B1: Construction mixture B2: Clay construction mixture 10: Magnetic separator 11: Sorting base body
12: Magnetic 13: Rotating belt
14: Collection hopper 20: Compression cutting device
30: Cologne dryer 40: Multi-layer incinerator
41: upper incineration unit 411: upper body
412: upper hopper 413: upper burner
414: Upper grate 414a: Protrusion for disassembly
415: upper discharge path 42: lower incineration section
421: Lower body 422: Lower hopper
423: lower burner 424: lower grate
424a: Slope for disassembly 425: Lower discharge path
50: mixer 60: press device
70: Firing kiln 80: Waste heat transfer tube
S10: Waste input step S20: Metal selection step S30: Compression cutting step S40: Kiln drying step
S50: Incineration step S51: Waste heat reuse step
S60: First building material mixing step S70: Second building material mixing step
S80: Press forming step S90: Firing step

Claims (7)

In the production method of producing construction materials (D) such as heat insulators and lightweight aggregates using landfilled waste (W),
A waste loading step (S10) of loading the waste (W) into a conveyor (C) that is transported in one direction;
A metal selection step (S20) in which metals present inside the waste (W) transferred after the waste loading step (S10) are selected through a magnetic separator (10);
A compression cutting step (S30) of moving the waste (W) from which the metal has been removed after the metal selection step (S20) to the compression cutting device (20) and cutting it into a predetermined size;
A kiln drying step (S40) of moving the cut waste (W) into the inside of a kiln dryer (30) and drying it at a set temperature in order to remove moisture from the waste (W) after the compression cutting step (S30);
An incineration step (S50) in which the dried waste (W) after the kiln drying step (S40) is moved to a multi-layer incinerator (40) and incinerated into ash;
After the incineration step (S50), the ash and the inorganic mixture (B) are supplied to the mixer (50) at a predetermined ratio and mixed into the building mixture material (B1) (S60);
After the first building material mixing step (S60), the building mixture material (B1) and the sewage sludge (H) dried to a moisture content of 25% to 35% are supplied to the mixer 50 to produce a clayey building mixture (B2). A second building material mixing step (S70) of mixing with;
After the second building material mixing step (S70), a press forming step (S80) of molding the clay-based building mixed material (B2) into a predetermined shape through a press device (60);
After the press forming step (S80), the molded clay building mixture (B2) is moved to a firing kiln (70) and fired at a set temperature to produce a building material (D) (S90). A method of producing building materials using landfill waste. According to claim 1,
The waste heat generated during the incineration step (S50) is moved to the inside of the mixer 50 through the waste heat transfer pipe 80 to reuse the waste heat, and the waste heat used in the mixer 50 is transferred to the inside of the firing kiln 70. Landfill waste, characterized in that it further includes a waste heat reuse step (S51) in which the waste heat is reused by moving to the firing kiln (70), and the waste heat used in the firing kiln (70) is moved back to the multi-layer incinerator (40) to reuse the generated waste heat. Construction material production method using . According to claim 1,
The magnetic separator 10 has a sorting base body 11 installed at a predetermined height on the upper part of the conveyor C, and is attached to the lower surface of the sorting base body 11 with a size equal to the width of the conveyor C. Magnet 12, a rotating belt 13 that is wound around the outer peripheral surface of the sorting base body 11 and moves the metal attached to the magnet 12 in one direction, and the magnetic force is released at the lower part of the conveyor C. A method of producing construction materials using landfill waste, characterized in that it consists of a collection hopper (14) for collecting falling metal. According to claim 1,
The multi-layer incinerator 40 includes an upper incinerator 41 in which the waste W is supplied upward and then incinerated at a predetermined temperature to generate ash, and a lower part of the upper incinerator 41. A method of producing construction materials using landfill waste, characterized in that it consists of a lower incineration unit (42) where waste (W) is supplied in one direction and then incinerated at a set temperature to generate ash. According to claim 4,
The upper incinerator 41 includes an upper body 411 with a space formed therein, an upper hopper 412 through which the waste (W) is supplied to the upper part of the upper body 411, and the upper body 411. An upper burner 413 that generates heat in the lower part of the upper body 411, an upper grate 414 that causes the waste (W) to fall to the lower part when it is seated and incinerated to a predetermined size, and the upper body 411. One side of the main body 411 is composed of an upper discharge passage 415 through which ash generated after incineration is discharged to the outside;
A method of producing construction materials using landfill waste, characterized in that a disassembly protrusion (414a) is formed at the upper center of the upper grate (414) so that the supplied waste (W) flows down and is dispersed on both sides. According to claim 4,
The lower incineration unit 42 includes a lower body 421 with a space formed therein, a lower hopper 422 through which the waste (W) is supplied to one side of the lower body 421, and the lower body 421. ), a lower burner 423 that generates heat in the lower part of the lower body 421, a lower grate 424 that causes the waste W to fall to the lower part when it is seated and incinerated to a predetermined size, and One side of the lower body 421 is composed of a lower discharge passage 425 through which ash generated after incineration is discharged to the outside;
A method of producing construction materials using landfill waste, characterized in that the lower grate (424) is formed with a decomposition slope (424a) inclined from one side to the other so that the supplied waste (W) flows down and disperses in the opposite direction to which it was supplied. According to claim 1,
The inorganic mixture (B) is mixed with 67 to 83 parts by weight of clay, 100 to 133 parts by weight of zeolite, and 33 to 50 parts by weight of stone with 100 parts by weight of ash;
A method of producing building materials using landfill waste, characterized in that the stone is formed of any one of mica, porcelain, or red clay.

Images