KR101360945B1 - Combustion furnace - Google Patents

Abstract

A combustion furnace with improved cooling structure of the great and air supply is disclosed. A combustion unit is provided with a space for combustion inside, a fuel supply unit for injecting fuel into one side, and a combustion chamber having an outlet for discharging combustion gas and an inside of the combustion chamber. It includes a grate to which a plurality of nozzles for grate for fastening, the grate is made of a box shape with a space formed therein, circulating the cooling fluid in the interior space to form a water-cooled structure for cooling It is characterized by having. Therefore, it has a structure that can be combined with water cooling as well as air cooling by blowing, which can drastically prolong the life, improve the fuel supply method, greatly improve the processing efficiency of combustion materials, and disassemble and assemble and maintain. It is easy.

Description

Combustion furnace {COMBUSTION FURNACE}

The present invention relates to a combustion furnace, and more particularly, to a combustion furnace that burns waste resources such as waste plastic and household waste and utilizes heat generated by such combustion as energy.

In general, combustion furnaces, such as tires, vinyl, and plastics, which are mainly used in the industrial field and daily life, are only partially recycled after use, and most of them are classified as wastes and are disposed of or disposed of incineration. In this case, problems such as securing of a landfill site during landfilling and contamination of groundwater by waste occur, causing problems of generating toxic gases and fumes harmful to the human body during incineration.

Conventional combustion furnaces are configured to burn waste resources such as waste plastics (RPF), household waste (RDF), and the like, and the Korean Electric Utility Model Utility Publication No. 0407477, "Renewable Energy Combustion Device with a Fuel Outlet in a Burner" Patent Publication No. 0691504 "Renewable energy combustion apparatus for producing fuel for combustion using heat generated during combustion" has been disclosed. In this prior art, the fuel inlet is suggested to be injected from the top through the center of the combustion burner, and a structure in which the combustion nozzle protrudes with a long rod-shaped pipe is disclosed.

However, the conventional combustion furnace has an internal temperature of about 1400°C to 1500°C, and the use conditions vary depending on the content of components such as nickel (Ni), chromium (Cr), and vanadium (V) and the combustion atmosphere. In the case of high temperature corrosion, such as molten salt corrosion, chloride corrosion, emulsion corrosion, etc., where corrosion gradually occurs. As a result, all structures in the furnace are deteriorated in life, durability, corrosion resistance and wear resistance.

In addition, in the conventional combustion furnace, the shape of the grate is made of a stepped shape, and the fuel of RDF as well as RPF has more impurities, so that natural combustion occurs, and as a result of combustion, combustion material accumulates on the top of the grate. There was a problem. In addition, the nozzle (Nozzle) is configured to flow in the direction of the orbiting flame wind. Conventionally, ash in the straight direction of the orbiting flame can be processed, but there is a problem that the ash cannot be processed in the circumferential direction, that is, in the vertical direction of the orbiting flame. there was.

As a result, as ash accumulates on the top of the conventional combustion furnace, there is a problem in that the efficiency of combustion decreases with time. In addition, since RDF has more non-combustible materials such as metal and glass among impurities in the fuel than RPF, when exposed to high temperatures, clinker, a material that does not burn, occurs, and clinker remains on the great surface for combustion. There were problems such as making it impossible.

In addition, the conventional combustion furnace is composed of a free-fall type fuel injection method, and when applied to a small combustion furnace of about 200 Kg/Hr to 300 Kg/Hr, the combustion chamber size and the diameter of the grate are small, about 1 m, and smooth fuel input This is possible, but when applied to a commercial combustion furnace of about 500Kg/Hr to about 2300Kg/Hr, it is impossible to input fuel smoothly because the combustion chamber size and the diameter of the great are about 5.5m. That is, in the case of a commercial combustion furnace, a swirling flame is formed between the center and the inner wall of the combustion furnace, and thus RPF or RDF having a low specific gravity has a fundamental problem that fuel cannot be dropped at a desired location by a free-falling fuel injection method.

In addition, the conventional combustion furnace has a problem in that the air supply unit is made of an air-cooled type in which cooling is performed only by blowing wind, and the air supply unit is a structure that directly receives the highest heat in the combustion furnace, thereby reducing the life of the air supply unit.

(Patent Document 1) KR 20-0407477

(Patent Document 2) KR 10-0691504

In order to solve this conventional problem, an object of the present invention is to provide a combustion furnace with an improved cooling structure of a great air supply unit.

In addition, it is an object of the present invention to provide a combustion furnace with an improved furnace input method into the combustion chamber.

In addition, an object of the present invention is to provide a combustion furnace with improved direction and angle of the tuyere so that reprocessing can be efficiently performed on the original function of the nozzle for burning the fuel.

In addition, an object of the present invention is to provide a combustion furnace made of an improved assembly structure to facilitate installation, disassembly and maintenance.

In addition, an object of the present invention is to provide a combustion furnace further equipped with an auxiliary reprocessing device capable of smoothly treating ashes in a blind spot in which great treatment is difficult.

The combustion furnace according to the present invention is a space portion for combustion is formed inside, a fuel supply portion is installed to inject fuel into one side, and a combustion chamber having a discharge port for discharging combustion gas is installed inside the combustion chamber. It includes a grate to which a plurality of nozzles for grate for injecting blown wind is fastened, the grate has a space formed therein, and a water-cooled structure for cooling by circulating a cooling fluid in the interior space It is characterized by having.

In addition, the combustion furnace according to the present invention is provided with a space for combustion inside, a fuel supply unit for injecting fuel into one side, and a combustion chamber with an outlet for discharging combustion gas and an interior of the combustion chamber As being to include an air supply unit to which a plurality of nozzles for air supply for fastening the blowing wind in the outer circumference, the air supply unit is formed with a space portion therein, and the cooling fluid is circulated in the inner space portion to cool It is characterized by having a water-cooled structure to perform.

In this case, the fuel supply unit is provided with a valve for controlling the strength and weakness of the blower, it is characterized in that the falling position of the fuel can be adjusted.

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In addition, at least a portion of the blower of the great nozzle is characterized in that it is formed to be inclined to blow (Blowing) the ash located on the upper surface of the great.

In addition, the nozzle for the great and the nozzle for the air supply is characterized in that it is made detachable to the great and the air supply, respectively.

In addition, the combustion furnace according to the present invention is installed to be able to enter the interior of the combustion chamber, and at the same time, it is rotatable in the vertical direction, and by spraying compressed air, it is possible to process ashes in the blind spot that the nozzle for the Great cannot handle, and the water cooling system The auxiliary reprocessing device provided is further provided.

Combustion furnace according to the present invention is made of a structure that can be combined with water cooling as well as air cooling by blowing, which can significantly extend the life, improve the fuel supply method, significantly increase the processing efficiency of the combustion material, and decompose It is a very useful invention that is easy to assemble and maintain.

1 is a configuration diagram showing a schematic configuration of a combustion furnace according to an embodiment of the present invention,
Figure 2 is a plan view showing a great combustion furnace according to an embodiment of the present invention,
Figure 3 is a side view showing the combustion furnace according to an embodiment of the present invention,
Figure 4 is a bottom view showing the great of the combustion furnace according to an embodiment of the present invention,
5 is a view showing the inside of the combustion furnace according to an embodiment of the present invention,
Figure 6 is a side view showing the air supply of the combustion furnace according to an embodiment of the present invention,
7 shows a rotating part of the combustion furnace according to an embodiment of the present invention,
8 is an exploded view of a rotating part of a combustion furnace according to an embodiment of the present invention,
9 illustrates a nozzle for a great furnace, according to an embodiment of the present invention,
10 illustrates a nozzle for an air supply unit of a combustion furnace according to an embodiment of the present invention,
11 shows a fuel supply part of a combustion furnace according to an embodiment of the present invention,
12 is a view showing a first great combustion furnace according to an embodiment of the present invention,
13 shows a third great combustion furnace according to an embodiment of the present invention,
14 is a view showing a second great combustion furnace according to an embodiment of the present invention,
15 shows an auxiliary reprocessing apparatus according to an embodiment of the present invention,
16 shows an auxiliary reprocessing nozzle according to an embodiment of the present invention.

Hereinafter, the technical configuration of the combustion furnace according to the accompanying drawings will be described in detail.

1 is a configuration diagram showing a schematic configuration of a combustion furnace according to an embodiment of the present invention.

As shown in FIG. 1, the combustion furnace according to an embodiment of the present invention largely includes a combustion chamber 10, a great 100, and an air supply unit 200, and is approximately 2300Kg large from a small capacity of approximately 200Kg It can be applied to various sizes up to capacity.

The combustion chamber 10 is a space in which waste resource fuels such as waste plastics (RPF) and household waste (RDF) are burned, and a space portion for combustion is formed therein, and is vertical to the ground with a predetermined width and height. Or it may be installed in a horizontal type (Horizontal Type). In this case, the inner wall of the combustion chamber 10 is made of a material and a structure excellent in heat insulation. A fuel supply unit 20 is installed at one side of the combustion chamber 10. The fuel supply unit 20 is for injecting fuel into the combustion chamber 10. In addition, an outlet 190 for discharging combustion gas is formed at an upper portion of the combustion chamber 10. However, the position of the outlet 190 can be appropriately changed design.

In addition, a plurality of combustion air discharge parts 11 are formed at predetermined intervals on the inner wall of the combustion chamber 10. Combustion air blown from the combustion air discharge unit 11 interacts with air blown from the air supply unit 200 to be described later to form a swirling flame inside the combustion chamber 10.

2 is a plan view showing a great furnace in accordance with an embodiment of the present invention, Figure 3 is a side view showing a great furnace in accordance with an embodiment of the present invention, Figure 4 is an embodiment of the present invention It is a bottom view showing the grate of the combustion furnace according to an example, and FIG. 5 shows the grate of the combustion furnace according to an embodiment of the present invention.

2 to 5, the great 100 is installed inside the combustion chamber 10, and a plurality of great nozzles 300 are fastened to the upper part, and the great nozzle 300 is a combustion chamber 10. Blow the blowing air for combustion inside. Great 100 is made of a conical shape inclined downward from the top to the bottom. Therefore, the ash burned at the top of the great 100 is naturally caused to flow downward by gravity. In this case, the great nozzles 300 are closely arranged to be spaced apart a predetermined distance on the top of the great 100.

In particular, the great 100 has a space portion formed therein, and has a water-cooled structure that performs cooling by circulating a cooling fluid in the interior space portion. That is, the body 130 of the Great is cooled in the high-temperature heat by performing a heat exchange by filling the hollow portion with a cooling fluid in a hollow shape. A central hole 140 for inserting an axis is formed in a central portion of the body 130 of the great body. In this case, the cooling fluid uses water, and the great body 130 is preferably made of a material containing nickel (Ni), chromium (Cr), vanadium (V), etc. that can withstand high temperatures. Through this structure, it is possible to greatly improve the cooling efficiency of the combustion furnace.

In addition, FIG. 6 is a side view showing an air supply unit of a combustion furnace according to an embodiment of the present invention. Referring to FIG. 6, the air supply unit 200 is installed inside the combustion chamber 10, and is provided in a number of outer circumferences. The nozzle 400 for the air supply unit is fastened, and the nozzle 400 for the air supply unit injects blowing air for combustion into the combustion chamber 10. In addition, the air supply unit 200 is coupled to the upper portion of the great 100 is rotatably installed on the same axis. In this case, the nozzles 400 for the air supply unit are closely arranged to be spaced apart at predetermined intervals on the outer circumference of the air supply unit 200.

In particular, the air supply unit 200 has a space portion formed therein, and has a water-cooled structure that performs cooling by circulating a cooling fluid in the interior space portion. That is, the main body 230 of the air supply unit is hollow, and the cooling fluid is filled in the hollow unit to perform heat exchange to cool the high temperature heat. In the main body 230 of the air supply unit, an insertion hole 231 for inserting the nozzle 400 for the air supply unit is formed. In this case, the cooling fluid uses water, and the main body 230 of the air supply unit is preferably made of a material containing nickel (Ni), chromium (Cr), vanadium (V), etc. that can withstand high temperatures. Through this structure, it is possible to greatly improve the cooling efficiency of the combustion furnace.

In addition, in the lower portion of the combustion chamber 10, a great blowing pipe 110 for supplying blowing wind to the great 100, and an blowing pipe 210 for supplying air for supplying blowing air to the air supply unit 200, 210 A water supply pipe 150 for supplying cooling fluid is installed. In addition, a plurality of water inlet holes 101 and water outlet holes 102 are formed at the bottom of the great 100, and one or a plurality of water distributors for supplying water to the plurality of water inlet holes 101 ( 170) is installed. In addition, a passage for introducing water and a passage for discharging water are formed in the lower part of the air supply unit 200. As a result, water, which is a cooling fluid, is heat exchanged while continuously circulating the inside of the great 100 and the air supply unit 200 to act as a heat medium and implement an efficient water-cooling structure.

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9 is a view showing a nozzle for a great combustion furnace that facilitates reprocessing according to an injection angle according to an embodiment of the present invention, and FIG. 10 is a nozzle for an air supply unit of a combustion furnace according to an embodiment of the present invention It is shown.

9 and 10, at least a portion of the blower of the great nozzle 300 is formed to be inclined to blow the combustion material located on the upper surface of the great 100.

That is, the great nozzle 300 is composed of a head 310 and an insertion part 320, and a plurality of blowers 301 and 302 for spraying blowing wind to the head 310 are formed. In this case, some of the tuyere 301 is formed to be inclined upward so that the blowing wind is injected in the upper direction, and some of the tuyere 302 is formed to be inclined downward to inject the blowing wind in the lower direction. Eventually, the combustion material loaded on the upper portion of the Great 100 is blown by the blower 302 inclined to the lower side, thereby causing the effect of blowing the ash, so that the ash rises upward and accumulates on the upper surface of the Great 100 Can be prevented. In this case, the inlets inclined to the lower portions are disposed to be spaced apart from each other by a predetermined distance, so that the lower inlet portion 302 blows combustion material in a region adjacent to the great nozzle 300 and the upper inlet portion 302 is used for the great portion. It is configured to minimize blind spots in blowing the combustion material by blowing the combustion material at a relatively distant portion with respect to the nozzle 300.

Eventually, the nozzle proceeds downward, straight and upward in the direction of the flame turning, and in particular, the blowing in the lower direction produces an effect of causing the combustion material on the upper surface of the great 100 to rise upward, and the nozzle not only turns, but also the turning direction By performing the blowing in the vertical direction, that is, in the outer direction of the combustion chamber 10, it is blown not only in the swirling direction but also in the vertical direction, thereby obtaining the effect of blowing the combustion material on the surface of the great 100.

Thus, through the improvement of the structure of the great 100 itself, the flame side achieves an organic harmony of the water cooling structure and the air cooling system under the great 100. In addition, it is possible to minimize the heat loss in the combustion chamber 10 by supplying high temperature air to the combustion chamber 10 while maintaining the temperature of the high temperature combustion chamber 10, and at the same time with the cooling fluid and air at rated load conditions, the great 100 By removing the heat of the surface temperature of the great 100 in the flame direction can be maintained at about 400 ℃ to 600 ℃. In this case, since the materials of the great 100 and the air supply unit 200 are exposed to high temperature corrosion and the cooling fluid is not directly in contact, a special heat resistant steel is grafted as air flows through the jet. It is preferred.

In addition, the nozzle 400 for the air supply unit is composed of a head 420 and an insertion unit 410, and one or a plurality of blowers 421 for spraying blowing wind to the head 420 is formed. In addition, the great nozzle 300 and the air supply nozzle 400 are made detachable to the great 100 and the air supply unit 200, respectively. That is, by forming the fastening projections (303,401) on one side of the insertion portion (320,410), the insertion portion (320,410) is inserted into the Great 100 and the air supply unit (200), respectively, and rotated to fix it, and in the reverse order It is possible to implement a detachable structure by separating with. Therefore, it has the advantage of easy assembly, installation and maintenance of the device. In this case, the great nozzle 300 and the air supply nozzle 400 is preferably configured to be rotatable to facilitate direction adjustment.

11 illustrates a fuel supply unit of a combustion furnace according to an embodiment of the present invention.

Referring to Figure 11, the fuel supply unit 20 is provided with a valve for controlling the strength and weakness of the blowing, it is characterized in that it is possible to adjust the drop position of the fuel. The valve may be implemented in the form of a butterfly valve, or may be implemented in other forms. That is, the fuel supply unit 20 is installed in the structure 21 having a predetermined height installed from the ground, so that fuel is injected into the combustion chamber 10. In the fuel supply unit 20, a fuel outlet 21 communicating with the inside of the combustion chamber 10 is formed at the end side of the main pipe 26, and the fuel supply pipe 22 is branched from the main pipe 26. Accordingly, compressed air is injected through the inlet of the main pipe 26 and fuel is dropped into the fuel supply pipe 22, and fuel is injected into the combustion chamber 10 through the fuel outlet 21.

After all, the fuel supply unit 20 of the combustion furnace according to an embodiment of the present invention is implemented as a forced injection type having a free-falling type, and passing a turning flame formed in the middle of the combustion chamber 10 to inject fuel into a desired position. You can. In addition, by controlling the strength and weakness of the blowing wind using a butterfly valve, it is possible to control the position at which the fuel falls, with a relatively precise control. In addition, by applying a water cooling system to the fuel supply unit 20, corrosion of the input unit due to long-term use of the device can be suppressed as much as possible. In this case, the water cooling system is installed on the outer circumferential surface of the main pipe 26 and may include a cooling water inlet 27 and a cooling water outlet 28.

12 shows a first grate of a combustion furnace according to an embodiment of the present invention, FIG. 13 shows a third grate of a combustion furnace according to an embodiment of the present invention, and FIG. 14 shows the A second grate of the combustion furnace according to an embodiment is illustrated.

Referring to FIGS. 12 to 14, the great 100 may be configured to be detachably coupled to each other prefabricatedly made of a plurality of pieces (Piece). In this embodiment, the great 100 is composed of three pieces, and is composed of the first great 100a, the second great 100b, and the third great 100c. The first, second, and third great (100a, 100b, 100c) is composed of a frame 130, the frame 130, the insertion hole 131 for the insertion portion 320 of the great nozzle 300 is inserted It is formed. One side of the insertion hole 131 is formed with a protrusion insertion hole 132 for fitting the protrusion 303 for fastening of the great nozzle 300. In addition, the great 100 has a structure in which projections are formed on the upper and lower sides, so as to be assembled as a tile and a decorative form, so as not to slide in a downward direction.

15 shows an auxiliary reprocessing device according to an embodiment of the present invention, and FIG. 16 shows an auxiliary reprocessing nozzle according to an embodiment of the present invention.

15 and 16, the combustion furnace according to an embodiment of the present invention further includes an auxiliary reprocessing apparatus 700. The auxiliary reprocessing apparatus 700 is installed to be able to enter the interior of the combustion chamber 10 and is rotatable in the vertical direction at the same time, and sprays compressed air to process ashes in the blind spot that the great nozzle 300 cannot process. It is possible and has a water cooling system. That is, the auxiliary reprocessing device 700 enters the inside of the combustion chamber 10 by using the driving force of the hydraulic cylinder 720, and rotates in the vertical direction using the lower cylinder 730 to boom 740. Is placed in an appropriate position. A plurality of auxiliary reprocessing nozzles 710 are coupled to the boom 740 to remove ashes and crankers between the great nozzles 300 on the great 100 by physical force, and at the same time, auxiliary reprocessing nozzles ( 710) can be completely removed using compressed air injected through. In this case, the lower cylinder 730 is provided with a spring 731 for a shortening action, and extends its life by applying a water cooling system to the boom 740. In addition, a compressed air inlet 7101 and a compressed air outlet 7102 are formed on one side of the auxiliary reprocessing nozzle 710.

The combustion furnace according to an embodiment of the present invention has been described with reference to the embodiment shown in the drawings so far, but this is merely exemplary, and anyone skilled in the art can understand that various modifications and equivalent other embodiments are possible therefrom. will be. Therefore, the true technical protection scope should be determined by the technical spirit of the appended claims.

10: combustion chamber 20: fuel supply
100: Great 200: air supply
300: Great nozzle 400: Air supply nozzle
110: Great blowing pipe 210: Blowing pipe for air supply
150: water supply pipe 101: water inlet
102: water discharge hole 170: water distributor
310,420: head 320,410: insert
301,302,421: vent 21: fuel outlet
22: fuel supply pipe 26: main pipe
100a: First Great 100b: Second Great
100c: Third Great 130: Frame
131: insertion hole 132: projection insertion hole
303: fastening projection 700: auxiliary reprocessing device
710: auxiliary reprocessing nozzle

Claims (7)

A space part for combustion is formed inside, and a fuel supply part 20 for injecting fuel into one side is installed, and the combustion chamber 10 and the combustion chamber 10 are formed with an outlet 190 for discharging combustion gas. In the combustion furnace including a great 100 to be installed therein a plurality of nozzles 300 for fastening for blowing the blowing wind on the top,
The fuel supply unit 20 is provided with a valve for controlling the strength and weakness of the blowing, the combustion furnace characterized in that the position of the fuel can be adjusted. A space part for combustion is formed inside, and a fuel supply part 20 for injecting fuel into one side is installed, and the combustion chamber 10 and the combustion chamber 10 are formed with an outlet 190 for discharging combustion gas. In the combustion furnace including an air supply unit 200 to which the nozzle 400 for a plurality of air supply for fastening the blowing wind to the outer periphery to be installed therein is fastened,
The fuel supply unit 20 is provided with a valve for controlling the strength and weakness of the blowing, the combustion furnace characterized in that the position of the fuel can be adjusted. The method according to claim 1,
It is installed inside the combustion chamber (10), characterized in that it comprises a plurality of air supply unit nozzles 400 for injecting blowing wind to the outer periphery, the air supply unit 200 is fastened. The method according to claim 3,
The great 100 and the air supply unit 200, respectively,
A combustion section characterized by having a water-cooled structure in which a space is formed in the interior, and cooling is performed by circulating a cooling fluid in the interior space. The method according to claim 1,
Combustion furnace characterized in that at least a portion of the blower of the great nozzle 300 is formed to be inclined to blow (Blowing) the ash located on the upper surface of the great (100). The method according to claim 3,
The great nozzle 300 and the nozzle 400 for the air supply unit, respectively, the combustion furnace, characterized in that detachable to the great 100 and the air supply unit 200. The method according to claim 1,
It is installed to be able to enter the inside of the combustion chamber 10 and is rotatable in the vertical direction at the same time, and it is possible to process ashes in a blind spot that the great nozzle 300 cannot process by spraying compressed air and equipped with a water cooling system. A combustion furnace further comprising one auxiliary reprocessing device (700).

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