CN220829074U - Continuous firing furnace - Google Patents
Continuous firing furnace Download PDFInfo
- Publication number
- CN220829074U CN220829074U CN202322466942.6U CN202322466942U CN220829074U CN 220829074 U CN220829074 U CN 220829074U CN 202322466942 U CN202322466942 U CN 202322466942U CN 220829074 U CN220829074 U CN 220829074U
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- China
- Prior art keywords
- continuous firing
- falling object
- firing furnace
- extending portion
- height direction
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- 238000010304 firing Methods 0.000 title claims abstract description 60
- 238000011084 recovery Methods 0.000 claims abstract description 45
- 238000004891 communication Methods 0.000 claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract 2
- 238000004140 cleaning Methods 0.000 abstract description 6
- 238000011109 contamination Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Tunnel Furnaces (AREA)
Abstract
A continuous firing furnace (1) is provided with: a tunnel-type furnace body; and an exhaust duct (2) provided in an upper portion of the furnace main body and discharging gas in the furnace main body to an outside of the furnace main body, wherein the exhaust duct has a horizontally extending portion (22) extending in a horizontal direction in a middle portion thereof, and the continuous firing furnace comprises: a communication path (4) extending from the side surface of the continuous firing furnace toward the horizontal direction extension portion and communicating with the exhaust passage; and a falling object recovery member (3) which is inserted into the communication path in a freely removable manner, is disposed on the horizontal direction extension portion, and receives foreign matter falling from the exhaust passage. According to the present utility model, since the falling object recovery member for receiving the foreign matter falling from the exhaust passage is provided, the falling object recovery member can be inserted and removed freely via the communication passage, and the foreign matter such as tar solidified in the exhaust passage can be recovered, and the cleaning operation can be simplified.
Description
Technical Field
The present utility model relates to a continuous firing furnace.
Background
In a continuous firing furnace such as a roller kiln, an atmosphere gas is introduced and discharged for adjusting the firing atmosphere. In such a continuous firing furnace, when the gas is discharged from the exhaust passage, foreign matter such as tar contained in the gas solidifies and falls directly into the furnace body due to a temperature difference between the inside and the outside of the furnace, and there is a possibility that contamination of the fired product may occur.
Accordingly, a continuous firing furnace having an exhaust passage 102 as shown in fig. 9 has been developed. The exhaust passage 102 includes: a first height direction extending portion 121 extending upward from a suction port formed in an inner wall (reference numeral 107 denotes a furnace body) of the furnace roof portion; a horizontal direction extending portion 122 communicating with the first height direction extending portion 121 and extending in the horizontal direction; and a second height direction extending portion 123 which communicates with the horizontal direction extending portion 122 and extends upward toward an exhaust port formed in the outer wall of the furnace roof portion. According to the continuous firing furnace provided with such an exhaust duct 102, for example, tar or the like solidified in the second height direction extending portion 123 falls down to the horizontal direction extending portion 122, and thus contamination of the fired product can be prevented.
However, in the continuous firing furnace including such a conventional exhaust duct 102, there is a possibility that the exhaust duct 102 is clogged due to long-term use, and the use condition is changed, so that cleaning work is required periodically. At this time, in order to remove the clogging, the top portion needs to be opened, and the horizontal direction extending portion 122 is heated to a high temperature during the operation of the continuous firing furnace, so that the horizontal direction extending portion 122 needs to be cooled to a normal temperature to perform the operation, and the cleaning operation is troublesome.
Disclosure of utility model
Problems to be solved by the utility model
Accordingly, an object of the present utility model is to provide a continuous firing furnace capable of collecting foreign matters such as tar solidified in an exhaust passage and having a simple cleaning operation.
Means for solving the problems
In order to solve the above problems, a first aspect of the present utility model is a continuous firing furnace (1) including a tunnel-type furnace body and an exhaust duct (2) provided at an upper portion of the furnace body and configured to exhaust gas in the furnace body to an outside of the furnace body,
The exhaust passage has a horizontally extending portion (22) extending in a horizontal direction in its middle,
The continuous firing furnace comprises: a communication path (4) extending from the side surface of the continuous firing furnace toward the horizontal direction extension portion and communicating with the exhaust passage; and a falling object recovery member (3) which is inserted into the communication path in a freely pluggable manner and is arranged on the horizontal direction extension part for receiving the foreign matters falling from the exhaust passage.
In addition, in the second aspect of the present utility model, in the continuous firing furnace according to the first aspect,
The exhaust passage includes: a first height direction extension part (21) extending upward from a suction port formed in the inner wall of the furnace roof part; the horizontal extending part is communicated with the first height direction extending part and extends along the horizontal direction; and a second height direction extending portion (23) which communicates with the horizontal direction extending portion and extends upward toward an exhaust port formed in an outer wall of the furnace roof portion.
In addition, a third aspect of the present utility model is the continuous firing furnace according to the second aspect,
The cross section of the falling object recovery member in the width direction is concave.
In addition, in a fourth aspect of the present utility model, in the continuous firing furnace according to the third aspect,
The falling object recovery member is in a box shape.
In a fifth aspect of the present utility model, in the continuous firing furnace according to the fourth aspect,
The width W1 of the falling object recovery member is 50mm to 120mm, and the height H1 is 30mm to 65 mm.
In addition, a sixth aspect of the present utility model is the continuous firing furnace according to the second aspect,
In the cross section in the axial direction of the exhaust passage, when the diameter of the first height direction extending portion is D1 and the diameter of the second height direction extending portion is D2, a distance L from the central axis A1 of the first height direction extending portion to the central axis A2 of the second height direction extending portion is L (d1+d2)/2 or more.
A seventh aspect of the present utility model is the continuous firing furnace according to the first aspect,
The continuous firing furnace further comprises a communication pipe (5), wherein the communication pipe (5) is inserted into the communication path, and the falling object recovery member is inserted into the communication path.
In addition, according to an eighth aspect of the present utility model, in the continuous firing furnace according to the seventh aspect,
The width W1 of the falling object recovering member is 50mm to 120mm, the height H1 of the falling object recovering member is 30mm to 65mm, the wall thickness t1 of the falling object recovering member is 4mm to 10mm,
In a state in which the falling object recovery member is placed in the center of the communicating pipe in the width direction, a gap CW between the falling object recovery member and one side of the communicating pipe in the width direction is 5mm or more and 40mm or less,
In a state where the falling object recovery member is placed on the communicating pipe, a clearance CH between the falling object recovery member and the communicating pipe in a height direction is 5mm or more and 40mm or less.
In addition, in the ninth aspect of the present utility model, in the continuous firing furnace according to the eighth aspect,
The distance L from the central axis A1 of the first height direction extending portion to the central axis A2 of the second height direction extending portion is 110mm to 150 mm.
Effects of the utility model
According to the present utility model, since the falling object recovery member for receiving the foreign matter falling from the exhaust passage is provided, the falling object recovery member can be inserted and removed freely via the communication passage, and the foreign matter such as tar solidified in the exhaust passage can be recovered, and the cleaning operation can be simplified.
Drawings
Fig. 1 is a schematic cross-sectional view of a continuous firing furnace according to a first embodiment of the present utility model.
Fig. 2 is a cross-sectional view of the continuous firing furnace according to the first embodiment at the X position.
Fig. 3 is a cross-sectional view of the continuous firing furnace according to the first embodiment at the Y position.
Fig. 4 is a cross-sectional view of a falling object recovery member of the continuous firing furnace according to the first embodiment.
Fig. 5 is a schematic cross-sectional view of a continuous firing furnace according to a second embodiment of the present utility model.
Fig. 6 is a cross-sectional view of the continuous firing furnace according to the second embodiment at the X position.
Fig. 7 is a cross-sectional view of the continuous firing furnace according to the second embodiment at the Y position.
Fig. 8 is a cross-sectional view of a falling object recovery member and a communicating pipe of the continuous firing furnace according to the second embodiment.
Fig. 9 is a cross-sectional view of an exhaust passage of a continuous firing furnace according to the related art.
Symbol description
1: Continuous firing furnace
2: Exhaust passage
3: Falling object recovery member
4: Communication path
21: A first height direction extending part
22: Horizontal extension
23: Second height direction extending part
W1: width of falling object recovering member
H1: height of falling object recovery member
T1: wall thickness of falling object recovery member
CW: gap between falling object recovery member and width direction single side of communicating pipe
CH: gap between falling object recovery member and communicating pipe in height direction
D1: diameter of the first height direction extension
D2: diameter of the second height direction extension
A1: central axis of first height direction extension part
A2: central axis of second height direction extension part
L: from the central axis of the first height direction extending portion to the central axis of the second height direction extending portion
Distance L of A2
Detailed Description
The continuous firing furnace 1 according to the first embodiment of the present utility model will be described in detail below with reference to fig. 1 to 4. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. As shown in fig. 1, the continuous firing furnace 1 carries the objects to be processed placed in the sagger 9 by the carrying rollers 12 in the furnace 10, and carries out heating treatment by the heating devices 11 disposed on the upper and lower surfaces of the carrying rollers.
The continuous firing furnace 1 includes a tunnel-type furnace body 7 and an exhaust duct 2 provided at an upper portion of the furnace body 7 and configured to discharge gas in the furnace body to an outside of the furnace body 7. As shown in fig. 2, the exhaust passage 2 has a horizontally extending portion 22 extending in the horizontal direction in the middle thereof. The continuous firing furnace 1 further includes: a communication passage 4 extending from the side surface of the continuous firing furnace toward the horizontal direction extending portion 22 and communicating with the exhaust passage 2; and a falling object collecting member 3 that is inserted into the communication path 4 so as to be capable of being inserted and removed, and is disposed on the horizontal direction extending portion 22 so as to receive the foreign matter falling from the exhaust passage 2.
The exhaust passage 2 includes: a first height direction extending portion 21 extending upward from a suction port formed in an inner wall of the furnace top portion; a horizontal direction extending portion 22 which communicates with the first height direction extending portion 21 and extends in the horizontal direction; and a second height direction extending portion 23 which communicates with the horizontal direction extending portion 22 and extends upward toward an exhaust port formed in the outer wall of the furnace roof portion. That is, the exhaust duct 2 of the continuous firing furnace 1 according to the present embodiment is formed in a horizontal L shape. Since the exhaust duct 2 includes the horizontal direction extending portion 22, foreign matter such as tar contained in the gas can be prevented from directly falling into the furnace body when the gas is exhausted from the exhaust duct. The exhaust passage 2 may have a straight pipe shape extending in the height direction. In the present embodiment, the horizontally extending portion 22 of the exhaust duct 2 is shown as extending in the longitudinal direction of the furnace, but the horizontally extending portion 22 may be extended in the width direction of the furnace. The exhaust passage 2 and the communication path 4 are formed by stacking heat-resistant bricks, for example.
The falling object recovery member 3 is formed of, for example, silicon carbide (SiC) or the like. The drop collecting member 3 is preferably concave in cross section in the width direction. By forming the shape as described above, the collected foreign matter can be prevented from being scattered from the falling object collecting member 3 when the falling object collecting member 3 is pulled out from the side surface of the continuous firing furnace 1. Further, the falling object recovery member 3 is more preferably formed in a box shape. The box shape is a shape having a bottom surface and 4 side walls.
The width W1 of the falling object recovery member 3 is 50mm to 120mm, the height H1 is 30mm to 65mm, and the wall thickness t1 of the falling object recovery member is preferably 4mm to 10mm, from the viewpoints of the recovery efficiency of the falling object and the strength of the falling object recovery member 3.
As shown in fig. 2, in the cross section in the axial direction of the exhaust passage 2, when the diameter of the first height direction extending portion 21 is D1 and the diameter of the second height direction extending portion 23 is D2, the distance L from the central axis A1 of the first height direction extending portion 21 to the central axis A2 of the second height direction extending portion 23 is preferably L (d1+d2)/2. In the case of L < (d1+d2)/2, a portion where the first height direction extending portion 21 and the second height direction extending portion 23 overlap in the height direction is formed, and foreign matter such as solidified tar may directly fall down into the furnace body, possibly causing contamination of the fired product. The distance L from the central axis A1 of the first height direction extending portion 21 to the central axis A2 of the second height direction extending portion 23 is preferably 110mm to 150 mm. The "axial cross section of the exhaust passage" refers to a cross section in the case where the exhaust passage is cut so as to be parallel to and include the central axes of the first height direction extending portion, the horizontal direction extending portion, and the second height direction extending portion. The exhaust passage 2 further includes a third height direction extending portion 24 communicating with the second height direction extending portion 2 above the second height direction extending portion 23. The diameter D3 of the third height direction extending portion 24 is larger than the diameter D2 of the second height direction extending portion 2.
Next, a continuous firing furnace according to a second embodiment of the present utility model will be described in detail with reference to fig. 5 to 8. The continuous firing furnace according to the second embodiment is different from the first embodiment in that the continuous firing furnace further includes a communication pipe 5 that is inserted into the communication path 4 and into which the falling object recovery member 3 is inserted. The communication pipe 5 is formed of, for example, silicon carbide (SiC) or the like. By inserting the communication pipe 5 into the communication path 4, the strength of the communication path 4 into which the falling object recovery member 3 is inserted and removed can be enhanced.
Regarding the relationship between the sizes of the falling object recovery member 3 and the communicating pipe 5, it is preferable that the gap CW between the falling object recovery member 3 and the communicating pipe 5 on one side in the width direction is 5mm or more and 40mm or less in the state where the falling object recovery member 3 is placed in the center in the width direction of the communicating pipe 5, and the gap CH between the falling object recovery member 3 and the communicating pipe 5 in the height direction is 5mm or more and 40mm or less in the state where the falling object recovery member 3 is placed in the communicating pipe 5, in terms of recovery efficiency of the falling object. The preferable numerical ranges of the width W1, the height H1, and the wall thickness t1 of the falling object collecting member 3 are the same as those of the first embodiment.
According to the continuous firing furnace 1 of the first and second embodiments, since the falling object recovery member 3 for receiving the foreign matter falling from the exhaust duct 2 is provided so as to be freely insertable and removable via the communication duct 2, the foreign matter such as tar solidified in the exhaust duct 2 can be recovered even during the operation of the continuous firing furnace 1, and the cleaning operation is simplified.
The present utility model is not limited to the above-described embodiments, and can be appropriately modified within a range not departing from the gist thereof.
Claims (9)
1. A continuous firing furnace (1) comprising a tunnel-type furnace body and an exhaust passage (2) provided in the upper part of the furnace body and discharging gas in the furnace body to the outside of the furnace body, characterized in that,
The exhaust passage has a horizontally extending portion (22) extending in a horizontal direction in its middle,
The continuous firing furnace comprises:
A communication path (4) extending from the side surface of the continuous firing furnace toward the horizontal direction extension portion and communicating with the exhaust passage; and
And a falling object recovery member (3) which is inserted into the communication path in a freely removable manner, is disposed on the horizontal direction extension portion, and receives foreign matter falling from the exhaust passage.
2. The continuous firing furnace according to claim 1, wherein,
The exhaust passage includes:
A first height direction extension part (21) extending upward from a suction port formed in the inner wall of the furnace roof part;
the horizontal extending part is communicated with the first height direction extending part and extends along the horizontal direction; and
And a second height direction extending portion (23) which communicates with the horizontal direction extending portion and extends upward toward an exhaust port formed in the outer wall of the furnace roof.
3. The continuous firing furnace according to claim 2, wherein,
The cross section of the falling object recovery member in the width direction is concave.
4. The continuous firing furnace according to claim 3, wherein,
The falling object recovery member is in a box shape.
5. The continuous firing furnace according to claim 4, wherein,
The width W1 of the falling object recovery member is 50mm to 120mm, and the height H1 is 30mm to 65 mm.
6. The continuous firing furnace according to claim 2, wherein,
In the cross section in the axial direction of the exhaust passage, when the diameter of the first height direction extending portion is D1 and the diameter of the second height direction extending portion is D2, a distance L from a central axis (A1) of the first height direction extending portion to a central axis (A2) of the second height direction extending portion is L (d1+d2)/2.
7. The continuous firing furnace according to claim 6, wherein,
The continuous firing furnace further comprises a communication pipe (5), wherein the communication pipe (5) is inserted into the communication path, and the falling object recovery member is inserted into the communication path.
8. The continuous firing furnace according to claim 7, wherein,
The width W1 of the falling object recovering member is 50mm to 120mm, the height H1 of the falling object recovering member is 30mm to 65mm, the wall thickness t1 of the falling object recovering member is 4mm to 10mm,
In a state in which the falling object recovery member is placed in the center of the communicating pipe in the width direction, a gap CW between the falling object recovery member and one side of the communicating pipe in the width direction is 5mm or more and 40mm or less,
In a state where the falling object recovery member is placed on the communicating pipe, a clearance CH between the falling object recovery member and the communicating pipe in a height direction is 5mm or more and 40mm or less.
9. The continuous firing furnace according to claim 8, wherein,
A distance L from a central axis (A1) of the first height direction extending portion to a central axis (A2) of the second height direction extending portion is 110mm to 150 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322466942.6U CN220829074U (en) | 2023-09-12 | 2023-09-12 | Continuous firing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322466942.6U CN220829074U (en) | 2023-09-12 | 2023-09-12 | Continuous firing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220829074U true CN220829074U (en) | 2024-04-23 |
Family
ID=90722298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322466942.6U Active CN220829074U (en) | 2023-09-12 | 2023-09-12 | Continuous firing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220829074U (en) |
-
2023
- 2023-09-12 CN CN202322466942.6U patent/CN220829074U/en active Active
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