CN215261134U - Kiln body structure of tunnel kiln - Google Patents
Kiln body structure of tunnel kiln Download PDFInfo
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- CN215261134U CN215261134U CN202121064080.9U CN202121064080U CN215261134U CN 215261134 U CN215261134 U CN 215261134U CN 202121064080 U CN202121064080 U CN 202121064080U CN 215261134 U CN215261134 U CN 215261134U
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Abstract
The utility model relates to a kiln body structure of tunnel cave, including the kiln body, the kiln body is equipped with preheating zone, heating area, high temperature district, cooling area and cooling space from the entry to the export in proper order, and the lateral wall of the kiln body includes insulating layer and iron sheet layer, and the iron sheet layer laminating is in the outside of insulating layer, its characterized in that: the thickness of the heat insulation layer is increased from the preheating zone, the heating zone to the high temperature zone in sequence; the thickness of the heat insulation layer is reduced from the high temperature area, the cooling area to the cooling area; the inner side surfaces of the heat insulation layers corresponding to the preheating zone, the heating zone, the high temperature zone, the cooling zone and the cooling zone are all positioned on the same plane. The kiln body structure of the tunnel kiln can more accurately control the temperature of each temperature area, prevent the green body from cracking during firing and greatly reduce the defective rate of ceramics.
Description
Technical Field
The utility model relates to a tunnel cave technical field especially relates to a kiln body structure of tunnel cave.
Background
The tunnel kiln is a continuous firing thermal equipment widely used for ceramic firing at present, and is a tunnel-like kiln built by refractory materials, heat insulation materials and building materials and internally provided with delivery vehicles such as kiln cars and the like. The kiln body of the tunnel kiln is a long linear tunnel, and the kiln body is divided into a preheating zone, a firing zone and a cooling zone from an inlet to an outlet in sequence: the preheating zone accounts for 30-45% of the total length of the kiln, the temperature ranges from room temperature to 900 ℃, and the vehicle-mounted blank is contacted with flue gas generated by fuel combustion in the burning zone and is sequentially heated to finish the preheating process of the blank; the firing zone accounts for 10-33% of the total length of the kiln, the temperature range is 900 ℃ to the highest firing temperature of the ceramic, the blank body reaches the required highest firing temperature by means of heat released by fuel combustion, and the firing process of the blank body is completed; the cooling area accounts for 38-46% of the total length of the kiln, the temperature range is from the highest temperature of ceramic firing to the kiln discharging temperature of the ceramic, the ceramic fired at high temperature enters the cooling area and exchanges heat with a large amount of cold air blown from the tail of the kiln, and the cooling process of the green body is completed.
However, in the actual ceramic firing process, because the tunnel kiln is a continuous kiln, the heat preservation requirements of all the areas are different, and the strict temperature control requirements are met for all the areas of the tunnel kiln; moreover, since the temperature in the firing zone must reach the lowest temperature at which the ceramic is fired (generally above 1800 ℃), which is a very large temperature difference from the temperature in the preheating zone (generally above 900 ℃), the ceramic may crack after entering the firing zone from the preheating zone due to the excessively high temperature in the firing zone, resulting in an increase in the defective rate of the ceramic leaving the kiln.
Disclosure of Invention
The utility model aims to solve the problem that a kiln body structure of tunnel cave is provided, the temperature of each warm area can be controlled more accurately to the kiln body structure of this kind of tunnel cave, prevents that the body from appearing breaking when firing, reduces ceramic defective percentage by a wide margin. The technical scheme is as follows:
the utility model provides a kiln body structure of tunnel cave, includes the kiln body, the kiln body is equipped with preheating zone, heating zone, high temperature district, cooling zone and cooling space from the entry to the export in proper order, and the lateral wall of the kiln body includes insulating layer and iron sheet layer, and the iron sheet layer laminating is in the outside of insulating layer, its characterized in that: the thickness of the heat insulation layer is increased from the preheating zone, the heating zone to the high temperature zone in sequence; the thickness of the heat insulation layer is reduced from the high temperature area, the cooling area to the cooling area; the inner side surfaces of the heat insulation layers corresponding to the preheating zone, the heating zone, the high temperature zone, the cooling zone and the cooling zone are all positioned on the same plane.
The temperature range of the preheating zone is usually between room temperature and 900 ℃, the temperature range of the heating zone is usually between 900 and 1500 ℃, the temperature of the high-temperature zone is the firing temperature of the ceramic and usually exceeds 1800 ℃, so that a blank can be heated gradually from the preheating zone to the heating zone before entering the high-temperature zone, the temperature difference between the heating zone and the high-temperature zone is not too large, more importantly, the situation that the heat insulation layers of the preheating zone and the heating zone are too thick and the temperature is heated too fast is avoided, the temperature of each temperature zone can be controlled more accurately, the situation that the blank is cracked due to too large temperature difference in the firing process is avoided, and the defective rate of the ceramic is greatly reduced.
The heat insulation layer on the side wall of the kiln body is set to be different in thickness according to the temperature requirements of different temperature zones, and the heat insulation requirement of the high temperature zone is highest, so that the heat insulation layer is thickened from the preheating zone, the heating zone to the high temperature zone and then thinned from the high temperature zone, the cooling zone to the cooling zone, and the heat insulation layers in different zones are different in thickness, so that the temperature of each temperature zone can be controlled more accurately.
As the preferable scheme of the utility model, the thickness of the heat insulation layer of the cooling area is smaller than that of the heating area; the thickness of the heat insulation layer of the cooling zone is smaller than that of the heat insulation layer of the preheating zone. The thickness of the heat insulation layer of the cooling area is smaller than that of the heat insulation layer of the heating area, the thickness of the heat insulation layer of the cooling area is smaller than that of the heat insulation layer of the preheating area, so that the overall temperature of the cooling area is lower than that of the heating area, the overall temperature of the cooling area is also lower than that of the preheating area, and after the ceramic enters the cooling area after being fired in the high-temperature area and then reaches the cooling area with lower temperature, a quenching cooling effect can be obtained, the surface of the ceramic is crystallized to generate gloss, and the firing effect of the ceramic is improved.
As a further preferred scheme of the utility model, the insulating layer includes from interior to the first heat-resisting brick layer that sets gradually outward, first heat-resisting sheet layer, heat-resisting cotton layer, the heat-resisting sheet layer of second and the heat-resisting brick layer of second. The heat-resistant bricks have the functions of high temperature resistance, fire resistance and heat insulation and can ensure that the heat-insulating layer is firmer; the middle two layers of heat-resistant boards realize further heat insulation, and the middle heat-resistant cotton layer can adjust the specific thickness according to the temperature control requirements of different temperature areas.
As a further preferred scheme of the utility model, the thickness of the heat-resistant cotton layer is increased in sequence from the preheating zone, the heating zone to the high-temperature zone; the thickness of the heat-resistant cotton layer is reduced from the high-temperature area, the cooling area to the cooling area in sequence. And adjusting the filling thickness of the heat-resistant cotton between the two heat-resistant plate layers according to the temperature requirements of different areas of the preheating area, the heating area, the high-temperature area, the cooling area and the cooling area so as to achieve the corresponding heat-resistant effect.
Compared with the prior art, the utility model, have following advantage:
the utility model discloses the insulating layer of tunnel kiln's kiln body structure sets different thickness according to the temperature requirement of different warm areas, the thickness of insulating layer is from the preheating zone, it increases in proper order to the high-temperature region to rise the warm area, again from the high-temperature region, it reduces to the cooling space in proper order to fall the warm area, make the body before entering the high-temperature region, can obtain a gradual intensification process from the preheating zone to rise the warm area, it can not be too big to rise the difference in temperature between the high-temperature region to rise the warm area, the thickness of the regional insulating layer of more importantly is different, can avoid the preheating zone, the insulating layer of rise the warm area is too thick and heat up too fast, can more accurate control the temperature in each warm area, thereby avoid the body to fire the too big and appear breaking in-process, ceramic defective percentage is reduced by a wide margin.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
wherein, each is marked as: 1-kiln body, 101-kiln body inlet, 102-kiln body outlet, 2-preheating zone, 3-heating zone, 4-high temperature zone, 5-cooling zone, 6-cooling zone, 7-heat insulation layer, 701 first heat-resistant brick layer, 702-first heat-resistant board layer, 703-heat-resistant cotton layer, 704-second heat-resistant board layer, 705-second heat-resistant brick layer and 8-iron sheet layer.
Detailed Description
The following further describes the preferred embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 and 2, a kiln body structure of a tunnel kiln comprises a kiln body 1, wherein the kiln body 1 is sequentially provided with a preheating zone 2, an elevating temperature zone 3, a high temperature zone 4, a cooling zone 5 and a cooling zone 6 from an inlet 101 to an outlet 102, the side wall of the kiln body 1 comprises a heat insulation layer 7 and an iron sheet layer 8, and the iron sheet layer 8 is attached to the outer side of the heat insulation layer 7; the thickness of the heat insulation layer 7 is sequentially increased from the preheating zone 2, the temperature rising zone 3 to the high temperature zone 4, the thickness of the heat insulation layer 7 is sequentially decreased from the high temperature zone 4, the temperature reducing zone 5 to the cooling zone 6, the thickness of the heat insulation layer of the temperature reducing zone 5 is smaller than that of the heat insulation layer of the temperature rising zone 3, the thickness of the heat insulation layer of the cooling zone 6 is smaller than that of the heat insulation layer of the preheating zone 2, and the inner side surfaces of the heat insulation layers corresponding to the preheating zone 2, the temperature rising zone 3, the high temperature zone 4, the temperature reducing zone 5 and the cooling zone 6 are all located on the same plane.
The utility model discloses the insulating layer 7 of kiln body 1 structure of tunnel cave sets different thickness according to the temperature requirement of different warm areas, the thickness of insulating layer 7 is from preheating zone 2, heating zone 3 increases in proper order to high-temperature region 4, again from high-temperature region 4, cooling zone 5 reduces in proper order to cooling zone 6, can more accurately control the temperature of each warm area, make the body before entering high-temperature region 4, can obtain a gradual intensification process from preheating zone 2 to heating zone 3, the difference in temperature between heating zone 3 and high-temperature region 4 can not be too big, avoid preheating zone 2, the insulating layer of heating zone 3 is too thick and heat up too fast, thereby avoid the body to fire the too big and appear breaking in-process temperature difference, reduce the defective percentage of pottery by a wide margin; on the other hand, the thickness of the heat insulation layer of the cooling area 5 is smaller than that of the heat insulation layer of the heating area 3, the thickness of the heat insulation layer of the cooling area 6 is smaller than that of the heat insulation layer of the preheating area 2, so that the overall temperature of the cooling area 5 is lower than that of the heating area 3, the overall temperature of the cooling area 6 is also lower than that of the preheating area 2, and after the ceramic enters the cooling area 5 after the high-temperature area 4 is fired and then reaches the cooling area 6 with lower temperature, a quenching cooling effect can be obtained, the surface of the ceramic is crystallized to generate luster, and the firing effect of the ceramic is improved.
As shown in fig. 2, the heat insulation layer 7 includes a first heat-resistant brick layer 701, a first heat-resistant board layer 702, a heat-resistant cotton layer 703, a second heat-resistant board layer 704, and a second heat-resistant brick layer 705 that are sequentially arranged from inside to outside, and the thickness of the heat-resistant cotton layer 703 increases sequentially from the preheating zone 2, the temperature rising zone 3 to the high temperature zone 4, and decreases sequentially from the high temperature zone 4, the temperature lowering zone 5 to the cooling zone 6. The innermost layer and the outermost layer adopt heat-resistant bricks, and the heat-resistant bricks have the functions of high temperature resistance, fire resistance and heat insulation and can ensure that the heat insulation layer is firmer; the middle two layers of heat-resistant boards realize further heat insulation, and the heat-resistant cotton layer 703 at the most middle can adjust the filling thickness of the heat-resistant cotton between the two layers of heat- resistant board layers 702 and 704 according to the temperature requirements of different areas of the preheating area 2, the heating area 3, the high-temperature area 4, the cooling area 5 and the cooling area 6, so as to achieve the corresponding heat-resistant effect.
In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The utility model provides a kiln body structure of tunnel cave, includes the kiln body, the kiln body is equipped with preheating zone, heating zone, high temperature district, cooling zone and cooling space from the entry to the export in proper order, and the lateral wall of the kiln body includes insulating layer and iron sheet layer, and the iron sheet layer laminating is in the outside of insulating layer, its characterized in that: the thickness of the heat insulation layer is increased from the preheating zone, the heating zone to the high temperature zone in sequence; the thickness of the heat insulation layer is reduced from the high temperature area, the cooling area to the cooling area; the inner side surfaces of the heat insulation layers corresponding to the preheating zone, the heating zone, the high temperature zone, the cooling zone and the cooling zone are all positioned on the same plane.
2. The kiln body structure of a tunnel kiln as recited in claim 1, wherein: the thickness of the heat insulation layer of the cooling area is smaller than that of the heating area; the thickness of the heat insulation layer of the cooling zone is smaller than that of the heat insulation layer of the preheating zone.
3. The kiln body structure of a tunnel kiln as claimed in claim 1 or 2, wherein: the heat insulation layer comprises a first heat-resistant brick layer, a first heat-resistant board layer, a heat-resistant cotton layer, a second heat-resistant board layer and a second heat-resistant brick layer which are sequentially arranged from inside to outside.
4. The kiln body structure of a tunnel kiln as claimed in claim 3, wherein: the thicknesses of the heat-resistant cotton layers are sequentially increased from the preheating zone, the heating zone to the high-temperature zone; the thickness of the heat-resistant cotton layer is reduced from the high-temperature area, the cooling area to the cooling area in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121064080.9U CN215261134U (en) | 2021-05-18 | 2021-05-18 | Kiln body structure of tunnel kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121064080.9U CN215261134U (en) | 2021-05-18 | 2021-05-18 | Kiln body structure of tunnel kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215261134U true CN215261134U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121064080.9U Active CN215261134U (en) | 2021-05-18 | 2021-05-18 | Kiln body structure of tunnel kiln |
Country Status (1)
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| CN (1) | CN215261134U (en) |
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2021
- 2021-05-18 CN CN202121064080.9U patent/CN215261134U/en active Active
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