JPH0712322A - Discharged gas disposal equipment - Google Patents

Abstract

PURPOSE:To extend a staying time of discharged gas within a heating chamber, perform a sufficient heating of the discharged gas and get a complete combustion by a method wherein a gas supplying pipe for taking discharged gas of a combustion furnace into the heating chamber is formed with a plurality of gas supplying holes, and a staying plate having a plurality of aeration holes therein is arranged within the heating chamber. CONSTITUTION:Discharged gas discharged from ignited substances within an ascending or descending type batch ceramic baking furnace is fed to a gas supplying pipe 11 within a discharged gas disposal equipment 3 through a ceiling pipe 7 as well as a suction fan 6. The discharged gas fed from the gas supplying pipe 11 is injected from the gas supplying holes 14 and further uniformly fed into a chamber 15 of a heating chamber 9. The discharged gas fed into the chamber 15 flows in sequence into each of the chambers 16, 18 through the aeration holes 19 in the staying plate 12. Since positions of the aeration holes 19 in the opposing staying plates 12 are different from each other, the discharged gas is clogged by the staying plates 12, stayed in each of the chambers 15 and 18, and the discharged gas is efficiently and sufficiently heated by heat generated at the gas heater 13 so as to perform a positive and complete combustion there.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treating apparatus for burning and decomposing a gas containing an organic binder discharged from a firing furnace.

[0002]

2. Description of the Related Art The structure and processing procedure of a direct combustion type exhaust gas processing apparatus will be described with reference to FIG.

In FIG. 3, reference numeral 31 is a tunnel type firing furnace, and 32 is a direct combustion type exhaust gas treatment apparatus. The gas discharged from the tunnel-type firing furnace 31 through the exhaust duct 33 is sucked by the blower 35 through the pipe 34, mixed with air, and then sent into the heating chamber 36.
It is completely burned by the flame emitted from the burner 37. Fuel gas is supplied to the burner 37 from a fuel supply device 38. The gas completely combusted in the heating chamber 36 is sent to the cooling chamber 40 through the communication hole 39. The gas cooled here is exhausted into the atmosphere by the exhaust blower 41.

[0004]

In the conventional exhaust gas treating apparatus, since the equipment is large, the initial cost becomes high. In addition, since the cost is high and the occupied area is large, it is not suitable for being mounted and used in a relatively small-sized firing furnace such as a batch type firing furnace. For example, when the exhaust gas from several batch-type firing furnaces is collectively processed, the piping path may become long, and the exhaust gas may become tar and adhere in the middle of the piping. Further, in the case of the gas type exhaust gas treatment device, there is a problem that NO _X and SO _X are generated.

Therefore, it is an object of the present invention to provide an exhaust gas treatment apparatus which is smaller in size, has good combustion efficiency, and is inexpensive.

[0006]

In order to achieve the above object, the present invention has a heating chamber in which a gas supply pipe and a heater are arranged, and a gas discharged from a firing furnace is supplied to the gas supply pipe by the gas supply pipe. In an exhaust gas treatment device that is taken into the inside of a heating chamber, heated by the heater, and decomposed by combustion, a plurality of gas supply holes are formed in the gas supply pipe, and a plurality of gas supply holes that penetrate both main surfaces are formed inside the heating chamber. It is characterized in that a retention plate having ventilation holes is arranged. Further, the present invention is characterized in that a plurality of retaining plates are provided, and the ventilation holes formed in the retaining plates are staggered between the opposing retaining plates.

[0007]

According to the exhaust gas treating apparatus of the present invention, when the gas sucked from the firing furnace is fed into the heating chamber through the gas supply pipe, the gas is ejected from the plurality of gas supply holes formed in the gas supply pipe. The gas is evenly fed into the heating chamber. Further, the gas sent into the heating chamber is restrained from flowing by a retaining plate arranged in the heating chamber, passes through a plurality of vent holes provided in the retaining plate, and slowly flows to the cooling chamber side little by little. To do. That is, the residence time of the gas in the heating chamber becomes long, and during that time, the gas is sufficiently heated by the heater and completely burned.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an exhaust gas treating apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of a case where an exhaust gas treating apparatus of the present invention is installed in a lifting type batch-type ceramic firing furnace, and FIG. 2 is a partial sectional view of the apparatus.

In FIG. 1, reference numeral 1 is an elevating type batch type ceramic firing furnace for firing an object to be fired 2. Reference numeral 3 denotes an exhaust gas treating apparatus of the present invention, which is made of a heat insulating material, and is fixed on the pedestal 4 in the upper portion of the lifting type batch type ceramic firing furnace 1. Reference numeral 5 is a suction pipe, one end of which is connected to the lifting type batch type ceramic firing furnace 1,
The other end is connected to the suction fan 6. Furthermore, the suction fan 6 is connected to one end of the ceiling pipe 7, and the other end of the ceiling pipe 7 is attached to the upper part of the exhaust gas treatment device 3.

As shown in FIG. 2, the interior of the exhaust gas treatment device 3 is partitioned into a heating chamber 9 and a cooling chamber 10 by a partition wall 8 which is arranged perpendicularly to the longitudinal direction. The heating chamber 9 is provided with, for example, five gas supply pipes 11, three retention plates 12, and 16 heaters 13. The gas supply pipes 11 are made of alumina or mullite, and each of the five gas supply pipes 11 is arranged perpendicularly to the longitudinal direction of the heating chamber 9. Therefore, only one of the five gas supply pipes is shown in FIG. Further, one end of each of the gas supply pipes 11 penetrates the ceiling portion of the heating chamber 9 and is connected to the ceiling pipe 7 attached to the upper portion of the exhaust gas treatment device 3. On the other hand, the other end is closed and fixed in contact with the floor of the heating chamber 9. Further, the gas supply pipe 11
A plurality of gas supply holes 14 are provided at equal intervals on the outer periphery of the. The retention plates 12 are made of porous alumina or mullite, and the three retention plates 12 are arranged perpendicular to the longitudinal direction of the heating chamber 9. Therefore, the heating chamber 9 is divided into four chambers 15 to 18 by the retaining plate 12. Further, the retention plate 12 is provided with a plurality of ventilation holes 19 penetrating both main surfaces. Vent hole 19
Are provided in a zigzag manner so that the two facing retention plates do not overlap at the same position. The heater 13 is a cylinder-shaped one-terminal heater made of an acid-resistant material, and is provided in each of 15 to 18 chambers partitioned by the retention plate 12.
The books are arranged horizontally with respect to the main surface of the retention plate 12. Further, one end of each of the heaters 13 has a heater terminal chamber (not shown) mounted on the outer wall of the exhaust gas treatment device 3.
To the inner wall of the heating chamber 9, and the other end is fixed to the inner wall of the heating chamber 9.

A partition wall 8 which divides the interior of the exhaust gas treatment device 3 into a heating chamber 9 and a cooling chamber 10 is provided with a plurality of ventilation holes 20 penetrating both main surfaces thereof, like the retention plate 12. .

Next, an exhaust gas processing operation using the exhaust gas processing device 3 will be described.

The gas discharged from the material 2 to be fired inside the lifting type batch ceramic firing furnace 1 is sucked up by the suction fan 6 through the suction pipe 5. further,
The gas is sent to the gas supply pipe 11 inside the exhaust gas treatment device 3 through the ceiling pipe 7. The gas sent to the gas supply pipe 11 is ejected from the gas supply hole 14 and is evenly sent to the chamber 15 of the heating chamber 9. The gas sent to the room 15 sequentially flows into the rooms 16 to 18 through the ventilation holes 19 of the retaining plate 12. At this time, since the positions of the vent holes 19 are different between the retaining plates 12 facing each other, the gas is blocked by the retaining plates 12 and flows slowly. That is,
The gas stays in each of the chambers 15 to 18 for a long time, and during that time, the gas is efficiently and sufficiently heated by the heat generated by the heater 13 and surely burns completely.

The completely combusted gas flows into the cooling chamber 11 through the through hole 20 provided in the partition wall 8. After being cooled here, the gas passes through the exhaust duct 21 and is exhausted to the atmosphere by the exhaust fan 22.

[0015]

According to the exhaust gas treating apparatus of the present invention, the combustion efficiency is good, and the gas is surely completely burned. Therefore,
The equipment can be downsized, and by occupying a small area, it can be installed in a batch type firing furnace and used.
At this time, since one exhaust gas treatment device can be used for one firing furnace, the gas piping path becomes shorter than that in the case where exhaust gas treatment of a plurality of firing furnaces is performed by one large-scale facility. The tar is rarely attached to the inner wall of the exhaust duct, and the labor for cleaning the inside of the exhaust duct is reduced. Moreover, since the initial cost is reduced and the gas is not incompletely burned due to the small equipment, NO _X and SO _X are not generated. In addition, when the one-terminal heater is used, the maintenance of the heater and the heater terminal chamber only needs to be performed on one side, and the labor of maintenance is reduced.

[Brief description of drawings]

FIG. 1 is an overall view of a case where an exhaust gas treating apparatus of the present invention is installed in a firing furnace.

FIG. 2 is a partial cross-sectional view of an exhaust gas treating apparatus of the present invention.

FIG. 3 is a partial cross-sectional view when a conventional exhaust gas treatment device is installed in a firing furnace.

[Explanation of symbols]

 3 Exhaust gas treatment device 9 Heating chamber 11 Gas supply pipe 12 Retention plate 13 Heater 14 Gas supply hole 19 Vent hole

Claims (2)

[Claims] 1. A heating chamber in which a gas supply pipe and a heater are arranged, the gas discharged from the firing furnace is taken into the heating chamber by the gas supply pipe, heated by the heater, and burned. In the exhaust gas treatment device that decomposes,
An exhaust gas treatment apparatus, wherein a plurality of gas supply holes are formed in the gas supply pipe, and a retention plate having a plurality of ventilation holes penetrating both main surfaces is arranged in the heating chamber. 2. A plurality of retention plates are disposed inside the heating chamber, and ventilation holes formed in the retention plates are formed by staggering the opposing retention plates. The exhaust gas treatment device according to item 1.