CN216472943U - Shaft kiln cooling device with good high-temperature performance - Google Patents
Shaft kiln cooling device with good high-temperature performance Download PDFInfo
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- CN216472943U CN216472943U CN202120466424.2U CN202120466424U CN216472943U CN 216472943 U CN216472943 U CN 216472943U CN 202120466424 U CN202120466424 U CN 202120466424U CN 216472943 U CN216472943 U CN 216472943U
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Abstract
The utility model belongs to the technical field of kilns, and particularly relates to a shaft kiln cooling device with good high-temperature performance, which is characterized by comprising a square frame body and a middle connecting bridge, wherein the square frame body is divided into two bilaterally symmetrical pore passages by the connecting bridge, the square frame body comprises a first prefabricated body and a steel plate arranged on the outer side of the first prefabricated body, and the steel plate and the first prefabricated body are connected into a whole through an anchoring part; the connecting bridge comprises a second prefabricated part and a tile-shaped steel plate arranged at the bottom of the second prefabricated part, and the second prefabricated part and the tile-shaped steel plate are connected into a whole through an anchoring part. Compared with the prior art, the utility model has the following beneficial effects: 1) a combined structure of a heat-resistant steel structure and a refractory material prefabricated part is adopted, and the high-temperature flexibility and rigidity of the structure are considered at the same time; 2) the refractory material prefabricated member has good high-temperature wear resistance and erosion resistance, and the steel structure has higher normal-temperature strength, so that the stability and the safety of the device can be guaranteed; 3) the installation of hoisting ring, convenient transportation and handling have ensured safe construction.
Description
Technical Field
The utility model belongs to the technical field of kilns, and particularly relates to a shaft kiln cooling device with good high-temperature performance.
Background
The shaft kiln has the advantages of simple production process, small equipment investment and the like, and is widely applied to producing light-burned magnesia by enterprises, blocky magnesite is generally adopted as a raw material for producing the light-burned magnesia by the shaft kiln, and the blocky degree of the magnesite entering the kiln is approximately 80-150 mm. The blocky materials are adopted to ensure that flue gas generated in the calcining zone can enter the preheating zone and exchange heat with blocky magnesite in the preheating zone, so that the aim of preheating is fulfilled. However, as the magnesite in the preheating zone has larger lumpiness, the heat exchange efficiency between the hot flue gas and the magnesite is lower, and the temperature in the flue is too high, which causes primary waste of energy. The light-burned magnesia shaft kiln is generally provided with a blower in a cooling zone, and cold air is blown into the cooling zone. Firstly, heat exchange is carried out between the heat exchanger and the hot material, so that the function of cooling the hot material is achieved; secondly, the cold air heated by the cooling zone enters the calcining zone to play the role of combustion air. However, the light burning process of magnesite is usually accompanied by a decrepitation phenomenon, and the activated magnesium oxide after light burning has low strength and a chalking phenomenon, and particularly the chalking phenomenon of high-grade magnesite is more serious. The powdered active magnesium oxide is gradually densified under the action of the gravity of the upper-layer material, the air permeability of the material is greatly reduced, and the blast pressure is obviously increased. Therefore, some light-burned magnesia shaft kilns are not provided with a cooling belt air-blowing device, directly discharge red materials, and adopt air cooling to further cause secondary waste of energy.
The tower-type reheating sintering shaft kiln is a novel shaft kiln, and the fuel of the shaft kiln is supported by hot air generated by forced heat exchange of cold air in a cooling zone through the forced heat exchange with hot materials to form composite heat, so that the energy-saving effect is realized, and therefore, for a cooling system of the cooling zone, a cooling device system of the cooling zone is required to have good thermal stability and mechanical property due to strong temperature difference and scouring action of the materials. The conventional cooling system usually adopts a steel structure, but for high-temperature materials with a cooling zone at about 1000 ℃, the softening deformation of the steel structure threatens the safety of the whole cooling system; if a high-temperature structural ceramic structure is adopted, although the high-temperature structural ceramic structure has good volume stability and wear resistance for high-temperature materials, the high cost, high-temperature brittleness and thermal stability are greatly tested, so that the structural design and the material design of a cooling device of the tower-type reheating sintering shaft kiln become bottleneck problems which restrict the type of the kiln.
Disclosure of Invention
The utility model aims to provide a shaft kiln cooling device with good high-temperature performance, which overcomes the defects of the prior art, adopts a combined structure of a steel structure and a refractory material prefabricated part to meet the requirements of wear resistance and erosion resistance in a high-temperature environment in a kiln, has higher normal-temperature strength in an outer kiln wall steel structure and a bridge bottom steel structure, is favorable for ensuring the stability and safety of the device, and adopts a hoisting ring installation form to ensure the safe construction of the device.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
the shaft kiln cooling device with good high-temperature performance is characterized by comprising a square frame body and a middle connecting bridge, wherein the connecting bridge divides the square frame body into two pore passages which are symmetrical left and right, the square frame body comprises a first prefabricated body and a steel plate arranged on the outer side of the first prefabricated body, and the steel plate and the first prefabricated body are connected into a whole through an anchoring part; the connecting bridge comprises a second prefabricated part and a tile-shaped steel plate arranged at the bottom of the second prefabricated part, and the second prefabricated part and the tile-shaped steel plate are connected into a whole through an anchoring part.
The cross section of the first prefabricated body is rectangular, and the upper surface of the second prefabricated body is of a trapezoidal ridge structure.
The square frame body is symmetrically provided with a plurality of hoisting rings, and the hoisting rings are connected with the steel plates on the square frame plate in a welding mode.
The material of the first prefabricated body and/or the second prefabricated body is any one of corundum-spinel refractory castable or corundum-mullite refractory castable.
The anchoring piece is made of heat-resistant steel, and the height of the anchoring piece is 1/3-1/2 of the thickness of the cross section of the prefabricated piece.
Compared with the prior art, the utility model has the following beneficial effects: 1) the combined structure of a heat-resistant steel structure and a refractory material prefabricated part is adopted, and the high-temperature flexibility and rigidity of the structure are considered; 2) the refractory material prefabricated part has good high-temperature wear resistance and erosion resistance, and the steel structure has higher normal-temperature strength, so that the stability and the safety of the device can be guaranteed; 3) the installation of hoisting ring, convenient transportation and handling have ensured the safe construction of device forcefully.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention
Fig. 2 is a schematic cross-sectional view of fig. 1.
In the figure: 1-square frame body, 2-connecting bridge, 3-hoisting ring, 4-pore channel, 5-prefabricated body I, 6-prefabricated body II, 7-anchoring piece, 8-steel plate and 9-tile-shaped steel plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, which are schematic structural views of an embodiment of a shaft kiln cooling device with good high-temperature performance according to the present invention, the shaft kiln cooling device includes a square frame 1 and a middle connecting bridge 2, the connecting bridge 2 divides the square frame 1 into two bilaterally symmetric pore canals 4, the square frame 1 includes a first preform 5 and a steel plate 8 disposed outside the first preform 5, and the steel plate 8 and the first preform 5 are connected into a whole through an anchoring member 7; the connecting bridge 2 comprises a second prefabricated part 6 and a tile-shaped steel plate 9 arranged at the bottom of the second prefabricated part 6, the second prefabricated part and the tile-shaped steel plate 9 are connected into a whole through an anchoring part 7, and the two ends of the tile-shaped steel plate 9 are welded with steel plates 8 corresponding to the positions to ensure the strength of the integrated structure.
The square frame body 1 is symmetrically provided with a plurality of hoisting rings 3, and the hoisting rings 3 are connected with the steel plates 8 on the square frame plate in a welding mode to ensure the connection strength. The number of the hoisting rings 3 is determined by the width of the square frame body, at least 2 hoisting rings are arranged on each side, and 4-6 hoisting rings are generally arranged according to the calculation of arranging one hoisting ring per meter.
In the embodiment, the cross section of the first preform 5 is rectangular, the upper surface of the second preform 6 is in a trapezoidal ridge structure, and the specific dimension is selected according to actual conditions.
The anchoring piece 7 used in the embodiment is made of heat-resistant steel, and the height of the anchoring piece 7 is 1/3-1/2 of the thickness of the cross section of the prefabricated piece, so that the enough connection strength is guaranteed.
In the above embodiments, the material of the first preform 5 and/or the second preform 6 is any one of corundum-spinel refractory castable and corundum-mullite refractory castable, and the volume density thereof should be ensured>3.0g/cm3Compression strength at room temperature>100MPa, high temperature rupture strength>5MPa, refractoriness under load>1600℃。
The above embodiments are merely specific examples selected for illustrating the purpose, technical solutions and advantages of the present invention in detail, but should not limit the scope of the utility model, and various modifications, equivalent substitutions and improvements made without departing from the spirit and principle of the present invention should fall within the scope of the present invention.
Claims (5)
1. The shaft kiln cooling device with good high-temperature performance is characterized by comprising a square frame body and a middle connecting bridge, wherein the connecting bridge divides the square frame body into two pore passages which are symmetrical left and right, the square frame body comprises a first prefabricated body and a steel plate arranged on the outer side of the first prefabricated body, and the steel plate and the first prefabricated body are connected into a whole through an anchoring part; the connecting bridge comprises a second prefabricated part and a tile-shaped steel plate arranged at the bottom of the second prefabricated part, and the second prefabricated part and the tile-shaped steel plate are connected into a whole through an anchoring part.
2. The shaft kiln cooling device with good high-temperature performance as claimed in claim 1, wherein the first preform has a rectangular cross section, and the upper surface of the second preform has a trapezoidal ridge structure.
3. The shaft kiln cooling device with good high-temperature performance as claimed in claim 1, wherein a plurality of hoisting rings are symmetrically arranged on the square frame body, and the hoisting rings are connected with the steel plates on the square frame plates in a welding manner.
4. The shaft kiln cooling device with good high-temperature performance according to claim 1, wherein the first and/or second prefabricated bodies are made of any one of corundum-spinel refractory castable and corundum-mullite refractory castable.
5. The shaft kiln cooling device with good high-temperature performance as claimed in claim 1, wherein the anchoring piece is made of heat-resistant steel, and the height of the anchoring piece is 1/3-1/2 of the thickness of the cross section of the prefabricated piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120466424.2U CN216472943U (en) | 2021-03-04 | 2021-03-04 | Shaft kiln cooling device with good high-temperature performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120466424.2U CN216472943U (en) | 2021-03-04 | 2021-03-04 | Shaft kiln cooling device with good high-temperature performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216472943U true CN216472943U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120466424.2U Active CN216472943U (en) | 2021-03-04 | 2021-03-04 | Shaft kiln cooling device with good high-temperature performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216472943U (en) |
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2021
- 2021-03-04 CN CN202120466424.2U patent/CN216472943U/en active Active
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