CN218380457U - Masonry structure capable of preventing cavitation damage of heat preservation layer - Google Patents
Masonry structure capable of preventing cavitation damage of heat preservation layer Download PDFInfo
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- CN218380457U CN218380457U CN202222465916.7U CN202222465916U CN218380457U CN 218380457 U CN218380457 U CN 218380457U CN 202222465916 U CN202222465916 U CN 202222465916U CN 218380457 U CN218380457 U CN 218380457U
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Abstract
The utility model discloses a can prevent masonry structure of heat preservation cavitation erosion harm, including working layer, heat preservation masonry layer, fire-resistant castable layer and the outer metal casing of stove, wherein, working layer, heat preservation masonry layer and the outer metal casing of stove set gradually by outer to interior, and heat preservation masonry layer adopts a plurality of insulating brick to build by laying bricks or stones and forms, and the fire-resistant castable layer separates from top to bottom through at least one fire-resistant castable layer in the height direction of layer. The utility model provides a can prevent masonry structure of heat preservation cavitation erosion harm, effectual separation the inside gas flow that probably takes place along the interior airflow direction of furnace kiln of heat preservation brickwork, prevented the development of heat preservation cavitation erosion harm, protected the heat preservation brickwork.
Description
Technical Field
The utility model relates to an industrial furnace brickwork structure technical field especially relates to a can prevent masonry structure of heat preservation cavitation erosion harm.
Background
The masonry of industrial furnaces is generally composed of a refractory layer (working layer) and an insulating layer (heat-insulating layer). The refractory layer (working layer) is a layer close to high temperature in the kiln, the masonry at the position is directly contacted with high-temperature furnace gas and product medium, and the material with large volume density, high compressive strength and high use temperature is generally adopted. The heat-insulating layer (heat-insulating layer) is generally provided with a plurality of layers, the heat-insulating layer requires low heat conductivity coefficient and has good heat-insulating effect, and compared with masonry of a fire-resistant layer, the material performance of the masonry of the fire-resistant layer has the characteristics of small volume density, low compressive strength, large porosity and the like.
At present, after some double-chamber shaft kilns are used for a period of time, the heat preservation brickwork appears and is cavitated and hollowed, and most of the working layer brickwork is intact, so that the external temperature of a kiln shell is high, the working layer has the risk of dumping, and the unplanned kiln shutdown maintenance is forced.
The periodic reversing of the double-hearth shaft kiln is carried out for about 15min, and the positive pressure in the kiln is increased to about 30kPa during the working period. The reversing time is about 1min each time, the pressure in the two kiln chambers (the calcining chamber and the preheating chamber) is firstly released to 0kPa from about 30kPa, then all valves are operated to reverse and discharge, the calcining chamber is switched to the preheating chamber, the preheating chamber is switched to the calcining chamber, the airflow directions of the two kiln chambers are changed (the airflow of the calcining chamber is downward, the airflow of the preheating chamber is upward), and then the two kiln chambers are pressurized to about 30kPa from 0kPa until the next reversing.
The working layer masonry of the double-hearth shaft kiln consists of a large number of refractory bricks and refractory mortar with the thickness of 2-3mm, and the defects of individual refractory bricks or mortar joints formed by the refractory mortar are completely eliminated basically when the normal production is carried out through various links such as masonry construction, furnace baking, trial production and the like. The working layer refractory brick and the ash joint with the defects are subjected to cavitation erosion impact of once quick pressure relief and quick pressure rise of high-temperature airflow every time the kiln is reversed, although the working layer refractory brick has the basic characteristics of large volume density, high compressive strength and high use temperature, the kiln is reversed for about 100 times every day, the cavitation erosion impact is little by little, the cavitation erosion impact is accumulated every day, and the whole thickness direction of the working layer masonry at the defects is thoroughly punctured after a period of time. The cavitation erosion enters the heat-insulating layer, and due to the characteristics of small volume density, low compressive strength, large porosity and low use temperature of the heat-insulating layer material, the cavitation impact capacity of high-temperature airflow resistance is weak, the cavitation erosion speed of the heat-insulating layer is high, and the cavitation volume of the heat-insulating layer is enlarged quickly. When the cavitation erosion breakdown of more than 2 working layer brickworks occurs in the airflow direction in the kiln, the heat preservation brickworks between the working layer brickworks are slowly communicated by the cavitation erosion, and the high-temperature airflow filled with stones in the kiln has resistance, the cavitation erosion communicated parts of the heat preservation brickworks form airflow short circuits, the cavitation erosion volume of the heat preservation brickworks in the area can be rapidly expanded until the heat preservation brickworks are completely cavitated to damage the hollowing, and finally the production safety of the whole kiln is influenced.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a masonry structure capable of preventing thermal insulation layer cavitation damage, which aims to protect the thermal insulation layer masonry by preventing the thermal insulation layer cavitation damage.
In order to achieve the above purpose, the utility model provides a masonry structure capable of preventing the cavitation damage of a heat preservation layer, which comprises a working layer, a heat preservation masonry layer, a refractory castable layer and a kiln outer metal shell, wherein,
the working layer, the heat preservation masonry layer and the outer metal shell of the furnace are sequentially arranged from outside to inside, the heat preservation masonry layer is built by adopting a plurality of heat preservation bricks, and the upper and lower refractory castable layers are spaced by at least one refractory castable layer in the height direction of the refractory castable layer.
Preferably, one end of the refractory castable layer is connected with the inner side of the working layer, and the other end of the refractory castable layer is connected with the inner side of the outer metal shell of the furnace kiln.
Preferably, the refractory castable layer forms a complete circle along the direction vertical to the airflow in the kiln to form a closed structure.
Preferably, the thickness of the refractory castable layer is 50mm to 150mm.
Preferably, the refractory castable layers are at least provided with two layers, and the distance between every two adjacent refractory castable layers in the height direction is 1500-2500 mm.
Preferably, the volume density of the refractory material used in the refractory castable layer is more than or equal to 2000kg/m 3 Compressive strength of not less than 50N/mm 2 。
Preferably, at least one heat-resistant steel plate is arranged in the height direction of the refractory castable layer to separate the upper refractory castable layer from the lower refractory castable layer.
Preferably, the thickness of the heat-resistant steel plate is 2-3 mm.
Preferably, one end of the heat-resistant steel plate is connected with the inner side of the working layer, the other end of the heat-resistant steel plate is connected with the inner side of the outer metal shell of the furnace kiln, and the heat-resistant steel plate forms a complete circle along the direction vertical to the airflow in the furnace kiln to form a closed structure.
Preferably, the heat-resistant steel plate is made of stainless steel; the heat-resistant steel plate and the refractory castable layer are arranged in parallel.
The utility model provides a can prevent masonry structure of heat preservation cavitation erosion harm through setting up the fire-resistant pouring bed of material to effectual separation the inside gas flow that probably takes place along the stove kiln internal gas flow direction of heat preservation brickwork has prevented the development of heat preservation cavitation erosion harm, has protected the heat preservation brickwork, and then has reduced the shut down repair time of stove, has prolonged the life of stove.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of a masonry structure capable of preventing a heat-insulating layer from cavitation damage;
FIG. 2 is a schematic view of a part of a masonry structure according to a first embodiment of the present invention capable of preventing a thermal insulation layer from cavitation damage;
FIG. 3 is a schematic structural view of a second embodiment of the masonry structure of the present invention for preventing the thermal insulation layer from cavitation damage;
fig. 4 is a schematic view of a local structure of a second embodiment of the masonry structure capable of preventing the thermal insulation layer from cavitation damage.
In the figure, 1-a working layer, 2-a first heat-preservation masonry layer, 3-a second heat-preservation masonry layer, 4-a third heat-preservation masonry layer, 5-a fourth heat-preservation masonry layer, 6-a kiln outer layer metal shell, 7-a refractory castable layer and 8-a heat-resistant steel plate.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 and 2, the present invention provides a masonry structure with a cavitation damage prevention function. In the embodiment, the masonry structure capable of preventing the thermal insulation layer from cavitation damage comprises a working layer 1 (formed by masonry of masonry), a thermal insulation masonry layer, a refractory castable layer 7 and a kiln outer metal shell 6, wherein,
working layer 1, heat preservation masonry layer and the outer metal casing 6 of stove set gradually by outer to interior, and heat preservation masonry layer adopts a plurality of insulating brick to build by laying bricks or stones and forms, and 7 intervals on 7 direction of height of refractory castable layer will be from top to bottom refractory castable layer 7 through at least one refractory castable layer 7.
In this embodiment, an example in which four thermal insulation masonry courses are disposed in a direction parallel to an airflow direction is specifically described, and the first thermal insulation masonry course 2, the second thermal insulation masonry course 3, the third thermal insulation masonry course 4, and the fourth thermal insulation masonry course 5 are disposed from inside to outside.
Referring to fig. 2, one end of the refractory castable layer 7 is connected with the inner side of the working layer 1, and the other end of the refractory castable layer 7 is connected with the inner side of the outer metal shell 6 of the kiln. The refractory castable layers 7 form a complete circle along the direction vertical to the airflow in the kiln to form a closed structure, namely, each refractory castable layer 7 covers the whole insulating layer along the direction vertical to the airflow in the kiln, so that the effect of gas flowing in the insulating layer masonry is further cut off.
Specifically, the thickness of the refractory castable layer 7 is 50mm to 150mm. The refractory castable layers 7 are at least provided with two layers, and the distance between every two adjacent refractory castable layers 7 in the height direction is 1500-2500 mm. The volume density of the refractory material used in the refractory castable layer 7 is more than or equal to 2000kg/m 3 And the compressive strength is more than or equal to 50N/mm 2 . The use temperature of the refractory castable layer 7 is equivalent to that of the brickwork material of the working layer 1 of the furnace.
When the masonry structure capable of preventing the cavitation erosion damage of the heat preservation layer is manufactured, when the heat preservation masonry layer is built along the airflow direction in a furnace, refractory castable with proper thickness is adopted at certain intervals to build a layer, one side of each layer of refractory castable is close to the outer metal shell of the furnace, and the other side of each layer of refractory castable is close to the masonry of a working layer. One side of each refractory castable layer is close to the outer metal shell of the kiln, and the other side of each refractory castable layer is close to the working layer.
The masonry structure that can prevent heat preservation cavitation erosion harm that this embodiment provided is through setting up fire-resistant castable bed of material 7 to effectual separation the inside gas flow that probably takes place along the stove internal gas flow direction of heat preservation brickwork, prevented the development of heat preservation cavitation erosion harm, protected the heat preservation brickwork, and then reduced the shut down repair time of stove, prolonged the life of stove.
Referring to fig. 3 and 4, the present invention provides a second embodiment of masonry structure that can prevent the thermal insulation layer from cavitation damage. The present embodiment is different from the above embodiments in that at least one heat-resistant steel plate 8 is provided in the height direction of the refractory castable layer 7 to space the upper and lower refractory castable layers 7 apart. Specifically, at least one heat-resistant steel plate 8 is arranged between every two refractory castable layers 7.
In this example, the thickness of the heat-resistant steel sheet 8 is 2mm to 3mm. Referring to fig. 4, one end of the heat-resistant steel plate 8 is connected with the inner side of the working layer 1, the other end of the heat-resistant steel plate 8 is connected with the inner side of the outer metal shell 6 of the kiln, and the heat-resistant steel plate 8 forms a complete circle along the direction vertical to the airflow in the kiln to form a closed structure, so that the effect of isolating the gas flow in the insulation layer masonry is further improved.
Specifically, the heat-resistant steel plate 8 is made of stainless steel, and the stainless steel plate is preferably made of SUS310S, and may be made of SUS309 or SUS321. The heat-resistant steel plate 8 and the refractory castable layer 7 are arranged in parallel.
In the embodiment, the heat-resistant steel plate 8 is arranged, so that gas flow in the heat-insulating layer masonry is further prevented, the heat-insulating layer masonry is effectively and reliably protected, the shutdown maintenance time of the furnace kiln is shortened, and the service life of the furnace kiln is prolonged.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A masonry structure capable of preventing a heat-insulating layer from being damaged by cavitation erosion is characterized by comprising a working layer, a heat-insulating masonry layer, a refractory castable layer and a kiln outer metal shell, wherein,
the working layer, the heat-insulating masonry layer and the furnace kiln outer-layer metal shell are sequentially arranged from outside to inside, the heat-insulating masonry layer is formed by building a plurality of heat-insulating bricks, and the upper and lower refractory castable layers are spaced from each other through at least one refractory castable layer in the height direction of the refractory castable layer.
2. A masonry structure according to claim 1 wherein one end of the refractory castable layer is attached to the inside of the working layer and the other end of the refractory castable layer is attached to the inside of the outer metal shell of the kiln.
3. A masonry structure capable of preventing cavitation damage due to insulation according to claim 2 wherein said refractory castable layer forms a closed structure with a complete revolution in the direction of air flow in the vertical kiln.
4. A masonry structure according to claim 2 wherein said refractory castable layer has a thickness of 50mm to 150mm.
5. A masonry structure according to claim 4, wherein there are at least two refractory castable layers, and the distance between two adjacent refractory castable layers in the height direction is 1500 mm-2500 mm.
6. Masonry structure capable of preventing cavitation damage of insulation according to claim 1, characterised in that the refractory castable layer uses a refractory material with a bulk density of 2000kg/m or more 3 And the compressive strength is more than or equal to 50N/mm 2 。
7. A masonry structure according to any one of claims 1 to 6 wherein there is at least one refractory steel plate spaced apart from the upper and lower refractory castable layers in the height direction of the refractory castable layers.
8. A masonry structure according to claim 7, wherein said heat resistant steel plates have a thickness of 2mm to 3mm.
9. A masonry structure capable of preventing erosion damage to an insulation layer according to claim 7 wherein one end of said heat resistant steel plate is attached to the inside of the working layer and the other end of said heat resistant steel plate is attached to the inside of the outer metal shell of the kiln, said heat resistant steel plate forming a complete circle in a direction perpendicular to the air flow in the kiln to form a closed structure.
10. Masonry structure capable of preventing insulation layer cavitation damage according to claim 7, characterised in that said heat resistant steel plates are made of stainless steel; the heat-resistant steel plate and the refractory castable layer are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222465916.7U CN218380457U (en) | 2022-09-15 | 2022-09-15 | Masonry structure capable of preventing cavitation damage of heat preservation layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222465916.7U CN218380457U (en) | 2022-09-15 | 2022-09-15 | Masonry structure capable of preventing cavitation damage of heat preservation layer |
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| Publication Number | Publication Date |
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| CN218380457U true CN218380457U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222465916.7U Active CN218380457U (en) | 2022-09-15 | 2022-09-15 | Masonry structure capable of preventing cavitation damage of heat preservation layer |
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| CN (1) | CN218380457U (en) |
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- 2022-09-15 CN CN202222465916.7U patent/CN218380457U/en active Active
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