KR101765146B1 - Combustion Device of Exhaust Gas - Google Patents

Abstract

The present invention relates to a combustion apparatus of exhaust gas, removing smell and tar from exhaust gas to discharge the exhaust gas as clean gas, thereby largely improving the environment. According to the present invention, cylindrical refractory heat plates (130) including a coiled metal heaters (H) and cylindrical refractory materials (140) having a discharge hole (141) perforated therein are disposed between a sidewall (110) of an inlet side and a sidewall (120) of an end side, and refractory partitions (150) having through-holes (151) vertically and alternately perforated therein are installed between the refractory heat plates (130) and the cylindrical refractory material (140); thereby extending a residence time of the exhaust gas in each combustion chamber. Moreover, thermocouples (153) are installed in a hole (152) connected to the through-hole (151), thereby controlling the combustion temperature of each combustion chamber. A plurality of installation grooves (131) are radially perforated on the refractory heat plates (130) to receive the coiled metal heaters (H).

Description

[0001] Combustion Device of Exhaust Gas [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas firing apparatus for a firing furnace, and more particularly, to an exhaust gas firing apparatus for a firing furnace, The exhaust gas is completely burned to dissolve the binder and various additive components contained in the exhaust gas, and the odor and tar are eliminated and discharged in a clean gas state, thereby greatly improving the environment.

Generally, when ceramic electronic parts or semiconductors are manufactured, ceramic products are mounted on a setter in order to obtain characteristics required of the ceramic products, and are then transferred to a firing furnace to supply atmospheric or atmospheric gas into the firing furnace, .

The atmospheric gas supplied for the characteristics required of the ceramic electronic product through the debindering process of the unfired ceramic formed body is formed of a furnace body having a furnace in a predetermined space in which the setter loaded with the unfired ceramic formed body is transported, And is supplied to the furnace chamber by an atmospheric or atmospheric gas supply pipe penetratingly connected to the side surface of the furnace.

Therefore, by heating the micro-sized ceramic formed body with heat generated from a heating element mounted on the furnace body, air or an atmospheric gas is supplied through an air or atmosphere gas supply pipe to have characteristics required of the electronic component.

The baking furnace is a pusher type furnace suitable for producing a stable temperature distribution and solidification of high temperature products, and a roller heatsheet furnace for baking the powder containing lithium and various compositions at 1300 to obtain desired properties. (Roller Hearth Kiln), Mesh Belt Type which is easy to maintain temperature maintenance and maintenance, and which is used for firing electronic products as well as various ceramic products in a continuous manner is known .

On the other hand, harmful exhaust gas is released in the calcining process performed before the main firing of the ceramic, and the degreasing process of the electronic component.

The exhaust gas contains a binder, various additives, odor and tar (TAR).

Patent Document: Korean Patent No. 10-1043955 (registered date June 17, 2011)

When the exhaust gas generated from the calcining furnace is directly discharged to the atmosphere, it causes environmental pollution due to various harmful substances as well as odor.

Conventionally, a deodorizing device, a scraper and a wastewater device provided with a platinum catalyst in the exhaust port have been installed in order to solve some of the causes of environmental pollution. However, despite the fact that the harmful gas removal effect can not be expected completely, The maintenance cost is very expensive and the problem is avoided due to economic problems.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the conventional problems, and it is an object of the present invention to provide an exhaust gas firing apparatus of a firing furnace capable of completely burning harmful substances including odor of binder gas and tar, .

Another object of the present invention is to provide an exhaust gas firing apparatus for a furnace in which a post-treatment apparatus is not required, installation and operation costs are low, efficiency is excellent, energy consumption is small, and economic benefits can be obtained.

Another object of the present invention is to provide an exhaust gas firing apparatus of a firing furnace capable of minimizing the installation area by maintaining the combustion residence time and optimizing the installation, and improving the performance and the commerciality due to the excellent processing capacity.

In order to achieve the above object, the present invention is characterized in that conveying rollers are disposed at a central portion of an inner passage connected from an inlet to an outlet so as to be rotated in an outlet direction by a driving means, So that the ceramic product is fired at a stage in which the predetermined internal temperature or atmosphere condition differs for each firing chamber 11 by separators 13 so that the fired products are not transferred to the internal passages at the previous stage and the succeeding stage at the time of conveyance, A firing furnace 10,

And a combustion apparatus 100 connected to each of the firing chambers 11 of the firing furnace 10 through the sub ducts 31 from the firing chamber 11 to the main duct 30 for burning the exhaust gas discharged through the exhaust pipe 104 ,

The combustion apparatus 100 includes a fire-resistant heat plate (not shown) in which coil-type metal heaters H are embedded between an inlet side wall 110 and an end side wall 120 through which an inlet hole 111 is opened, (130) and a cylindrical refractory material (140) having an exhaust hole (141)

A refractory partition plate 150 is provided between the refractory heat plates 130 and the cylindrical refractory material 140 so that the through holes 151 are vertically crossed to extend the residence time in each combustion chamber.

The refractory partition plates 150 are provided with thermocouples 153 through holes 152 connected to the through holes 151 so as to control the combustion temperatures of the respective combustion chambers,

The refractory heat plates 130 are formed in a manner that a plurality of the installation grooves 131 are radially formed in a "? Shape " so that the coiled metal heaters H are received and the heat is uniformly transferred to the inside.
The main duct 30 is provided with an oxygen supply line 20 for supplying oxygen into the combustion chamber so as to control the supply of oxygen to the valve 21.

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According to the present invention, the exhaust gas is burned at a high temperature by the coil-shaped metal heaters formed along the circumference of the cylinder, and the exhaust gas is moved in the jig regime by the refractory diaphragms, .

Therefore, it is not necessary to use various post-treatment devices as well as the platinum catalyst, and it is possible to completely exhaust the harmful substances including the odor of the binder gas and tar, and to be discharged in a clean state.

In addition, since the installation cost and the operating ratio are low, the efficiency is excellent, the energy waste is small, and the economical benefit can be obtained, the installation area can be minimized by the installation optimization, and the processing capacity can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a state in which the present invention is installed in a firing furnace;
2 is a longitudinal section of the apparatus of the present invention;
3 is a cross-sectional view showing the position of the refractory hot plate of the present invention.
4 is a partially enlarged view of Fig.
5 is a perspective view of a refractory diaphragm.
6 is a partially cut-away cross-sectional view in a state in which a refractory partition is installed;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in the drawing, conveying rollers (not shown) are disposed in the center of the inner passage connected from the inlet to the outlet of the firing furnace 10 so as to be rotated in the outlet direction by the driving means.

FIG. 1 shows a mesh belt firing furnace.

The fired product contained in the tray is heated by the heaters 12 to a predetermined temperature for each zone of the firing chamber 11 by the upper part of the mesh belt so that the fired product is not transferred to the inner passage of the pre- The firing chambers 11 are divided into zones by the plurality of firing chambers 13.

A gas pipe (not shown) is connected to each of the firing chambers 11, and an atmospheric gas is introduced through the gas pipe. After the atmosphere gas acts, the exhaust gas containing the burned binder and the smell is discharged to the main duct 30, respectively.

At this time, a combustion device 100 for burning exhaust gas is provided to purify the harmful exhaust gas. The combustion device 100 is introduced through the main duct 30, is burnt, cleaned with clean gas, and discharged through the exhaust pipe 104.

The combustion apparatus 100 includes a refractory heat plate 130 and a cylindrical refractory 140 which are cylindrically formed at a substantially central position where the heat insulating material 101 made of a heat insulating brick or a heat insulating board is stacked, A plurality of refractory partition plates 150 are formed between the refractory heat plates 130 and the cylindrical refractory material 140 so that the through holes 151 are vertically crossed in a state where the end side walls 120 are located on the other side 3) from above.

 The refractory heat plate 130 is made of a refractory material in a cylindrical shape. A plurality of the installation grooves 131 are formed in a radial shape in a substantially "? Shape ", and the coil- When the heat is generated, the heat is transferred along the passageway inside.

Since the refractory heat plate 130 has a heat accumulating function, the exhaust gas is heated in a state in which there is almost no change in temperature due to the heating value of the coil-type metallic heater H.

The inlet side wall 110 allows the exhaust gas to be supplied to the inside in a state where the inlet hole 111 is opened and connected to the main duct 30 and the other side end portion of the refractory partition 150 The exhaust pipe 141 is connected to the exhaust pipe 104 so that the exhaust gas having been burned can be discharged to the outside.

Meanwhile, refractory diaphragms 150 are installed between the refractory heat plates 130 and the cylindrical refractory material 140 such that the through holes 151 are vertically crossed.

As shown in FIG. 5, the refractory partition plate 150 is formed in a plate shape and has a through hole 151 at a position offset from the center. The refractory partition plate 150 is inserted into the through hole 151 at three places, Position is placed alternately up and down.

Accordingly, three combustion chambers can be formed by the three refractory heating plates 130, which are cylindrically formed between the refractory partition plates 150 and the inlet side walls 110, The exhaust gas can not be directly moved by the refractory diaphragms 150 in each combustion chamber after the exhaust gas is introduced through the holes 111 and a predetermined residence time can be maintained.

The internal temperature of each combustion chamber is maintained at 850-900 ° C by heating the coiled metal heater H by setting of the control device and the size of the through hole 151 drilled in the refractory partition plate 150 is adjusted It is preferable to set the time for the exhaust gas to stay in each combustion chamber to about 5-6 seconds.

At this time, the refractory partition plates 150 are provided with thermocouples 153 through holes 152 connected to the through holes 151 to control the combustion temperatures of the respective combustion chambers.

In addition, the thermocouple 153 has an overheating prevention function and also serves as a stabilizer for the combustion furnace.

The main duct 30 is provided with an oxygen supply line 20 for supplying oxygen to the inside of the combustion chamber to control the supply and supply of oxygen to and from the valve 21.

That is, when the calcination is performed in an oxygen-free atmosphere in accordance with the working conditions of the calcining furnace 10, the exhaust gas may not be burned due to the lack of oxygen. In this case, the valve 21 is opened, So that complete combustion can be performed.

It is also preferable that a plurality of blowers 32 are provided in the main duct 30 and the exhaust gas is forcedly supplied from the firing chambers 11 to the combustion apparatus 100.

The combustion apparatus 100 is provided with a separate power source chamber 103 for enclosing the outside of the heat insulating materials 101 with the cover 102 and for supplying power to the coiled metal heater H. [

In the present invention, the air is mixed with the exhaust gas generated in the calcining step of the ceramics and the degreasing step of the electronic parts, and then heated to a high temperature in the multi-stage combustion chamber to decompose the binder and the additive component contained in the exhaust gas The smell and tar are extinguished and released into the atmosphere in clean air of carbon dioxide and water vapor.

In this case, the fire resistance heat plate 130 constituting each combustion chamber is cylindrically shaped and can maintain the temperature distribution inside the combustion chamber uniformly without any deviation by the radiant energy heating method to the inner center portion, thereby maximizing the complete combustion efficiency of the exhaust gas.

In addition, since the passage holes 151 are arranged vertically in the refractory partition plates 150, the exhaust gas is gradually moved while staying in the combustion chamber in a jig manner, thereby maintaining the combustion residence time and optimizing the installation space of the apparatus The energy efficiency is minimized.

In addition, there is no need for a separate exhaust gas aftertreatment device such as a wet scrubber or wastewater system, which can greatly reduce the installation cost and operation cost.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

The present invention is applied to the field of firing furnace. Particularly, the present invention is applied to a technique of completely burning various odors and harmful substances generated in a firing process and a degreasing process, and then discharging it in a clean state.

10 - firing furnace 11 - firing chamber
20 - oxygen supply line 30 - main duct
100 - combustion device 110 - inlet side wall
120 - End side wall 130 - Refractory hot plate
131 - Installation groove 140 - Cylindrical refractory material
150 - Refractory diaphragm H - Coil type metal heater

Claims (3)

Conveying rollers are disposed in the central portion of the inner passage connected from the inlet to the outlet so as to be rotated in the direction of the outlet by the driving means and the contents contained in the tray are heated by the heater 12 to a predetermined internal temperature A baking furnace 10 in which the ceramic products are baked at a different stage of the atmospheric conditions and the respective sections are partitioned by separators 13 so that the baked products are not transferred to the inner and outer passages at the time of transferring,
And a combustion apparatus 100 connected to each of the firing chambers 11 of the firing furnace 10 through the sub ducts 31 from the firing chamber 11 to the main duct 30 for burning the exhaust gas discharged through the exhaust pipe 104 ,
The combustion apparatus 100 includes a fire-resistant heat plate (not shown) in which coil-type metal heaters H are embedded between an inlet side wall 110 and an end side wall 120 through which an inlet hole 111 is opened, (130) and a cylindrical refractory material (140) having an exhaust hole (141)
A refractory partition plate 150 is provided between the refractory heat plates 130 and the cylindrical refractory material 140 so that the through holes 151 are vertically crossed to extend the residence time in each combustion chamber.
The refractory partition plates 150 are provided with thermocouples 153 through holes 152 connected to the through holes 151 so as to control the combustion temperatures of the respective combustion chambers,
Wherein the refractory heat plates (130) have a plurality of installation grooves (131) radially formed in a "? Shape " to accommodate the coil type metal heaters (H).
The apparatus according to claim 1, wherein the main duct (30) is provided with an oxygen supply line (20) for supplying oxygen into the combustion chamber to control the supply of oxygen to the valve (21) .






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