Cooler center hood

Abstract

The utility model discloses a central air cap of a cooler, which belongs to the technical field of vertical coolers of rotary kilns and comprises a cylindrical air cap vertical pipe and an air cap brim fixed at the upper end of the air cap vertical pipe through a plurality of vertical plates. A circumferential supporting structure is arranged in an inner cavity of the air cap vertical pipe and comprises a plurality of supporting plates located in a vertical plane. Wherein the width of each supporting plate is equal to the radius of the inner cavity of the vertical pipe of the wind cap; the outer side wall of each supporting plate is fixedly connected with the inner surface of the air cap vertical pipe; the inner side walls of the plurality of supporting plates are fixedly connected with one another; the height of the supporting plate is greater than or equal to 1 / 2 of the height of the vertical pipe of the air cap; the wall thickness of the air cap vertical pipe is 5mm to 7mm; the supporting structure is arranged in the wind cap vertical pipe, so that the technical problem that the central wind cap collapses due to the fact that the wind cap vertical pipe is easy to deform and crack when bearing larger lateral pressure in the prior art is solved, and the integral rigidity and the deformation resistance of the wind cap can be enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vertical coolers of rotary kilns, in particular to a central hood of a cooler. Background Art

[0002] Vertical cooler is a kind of equipment specially used for cooling high temperature materials. It is usually used in conjunction with a rotary kiln and is widely used in industries such as active lime, cement, and metallurgy. The equipment uses a vertically arranged cooling structure to fully utilize gravity and air flow to achieve efficient and uniform cooling effects.

[0003] In the active lime rotary kiln production line, the main function of the cooler is to quickly cool the finished lime after calcination to achieve the highest activity of the lime. At the same time, the cooler is also responsible for heating the secondary air so that the temperature of the secondary air entering the rotary kiln reaches 500-700℃, thereby reducing the heat consumption of the system. The key component to achieve these functions is the central hood installed inside the cooler; the main body of the central hood is a hollow cylindrical structure, with natural air passing through the inside and lime to be cooled on the outside. The air is blown out by the hood, so that the airflow and the lime exchange heat in reverse, which not only achieves the cooling of the lime but also completes the preheating of the air. Therefore, the central hood plays an important role in the process of cooling the lime and preheating the air.

[0004] However, the existing central hood has some problems during use:

[0005] First, affected by the heat radiation and conduction of high-temperature lime, the hood also needs to withstand the impact of lime, which is prone to deformation, weld cracking and other damage;

[0006] Second, when the cooler is blocked or the material is displaced, the hood will be subjected to greater lateral pressure, which may easily lead to collapse.

[0007] The prior art discloses a rotary kiln vertical cooler hood, publication number CN203758231U: the prior art changes the original pointed hood top into a flat type to form a protective layer for the hood; subsequent lime falls directly onto the lime layer remaining on the plane without directly washing the hood body, and its high temperature cannot directly affect the hood, effectively protecting the hood, thereby greatly extending the service life of the hood; four reinforcing rib plates are added to the central hood, and the flat top and bottom of the hood are all provided with stable supports in four directions, so that the hood as a whole has strong impact resistance and will not produce impact deformation; the hood is made of heat-resistant stainless steel 1Cr18Ni9Ti, which has good heat resistance compared to ordinary carbon steel and a long service life in high temperature environment.

[0008] However, the above-mentioned prior art does not take protective measures for the hood riser of the hood. The hood riser is prone to deformation and cracking when subjected to a large lateral pressure, resulting in the collapse of the central hood.

[0009] In this regard, the utility model provides a cooler central hood in which a supporting device is arranged in a hood riser. Utility Model Content

[0010] The utility model aims to provide a central hood of a cooler to solve the technical problem in the background art that the hood riser is prone to deformation and cracking when subjected to greater lateral pressure, resulting in collapse of the central hood.

[0011] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0012] A central hood of a cooler, comprising a cylindrical hood riser, and a hood brim fixed to the upper end of the hood riser through a plurality of vertical plates; a circumferential support structure is arranged in the inner cavity of the hood riser, and the support structure comprises a plurality of support plates located in a vertical plane; wherein:

[0013] The width of each support plate is equal to the radius of the inner cavity of the hood riser; the outer side wall of each support plate is fixedly connected to the inner surface of the hood riser; the inner side walls of several support plates are fixedly connected to each other;

[0014] The height of the support plate is greater than or equal to 1 / 2 of the height of the hood riser;

[0015] The wall thickness of the hood riser is 5 mm to 7 mm.

[0016] Preferably, the support plate is provided with a plurality of openings, which can save materials and reduce manufacturing costs while ensuring sufficient strength.

[0017] Preferably, the support structure includes three support plates, and the angle between two adjacent support plates is 120 degrees; a stable support frame can be formed inside the hood riser, further improving the hood's ability to resist deformation.

[0018] Preferably, the support structure includes four support plates, and the angle between two adjacent support plates is 90 degrees; a stable support frame can be formed in the hood riser, further improving the hood's anti-deformation ability.

[0019] Preferably, the support structure includes six support plates, and the angle between two adjacent support plates is 60 degrees, which can form a stable support frame inside the hood riser, further improving the hood's anti-deformation ability.

[0020] Preferably, the support plate is made of 1Cr13 stainless steel, which has good high-temperature strength and oxidation resistance, can adapt to the high-temperature environment of the hood, and prolongs its service life.

[0021] Preferably, the height of the support plate is equal to 2 / 3 of the height of the hood riser, which can provide sufficient support for the hood riser.

[0022] Preferably, the wall thickness of the hood riser is 6 mm, and after the support plate improves the stability of the support riser, the thickness of the material required for the support riser is reduced.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model solves the technical problem in the prior art that the hood riser is easily deformed and cracked when subjected to large lateral pressure, resulting in the collapse of the central hood, by arranging a support structure inside the hood riser, and can enhance the overall rigidity and deformation resistance of the hood; a circumferential support structure is arranged in the inner cavity of the hood riser, and the support structure includes a plurality of support plates located in a vertical plane; the width of each support plate is equal to the radius of the inner cavity of the hood riser; the outer wall of each support plate is fixedly connected to the inner surface of the hood riser; the inner walls of the plurality of support plates are fixedly connected to each other; a stable support frame is formed in the hood riser, and the deformation resistance of the hood is improved. The stability of the hood is strengthened from the structural point of view; the material of the support plate is 1Cr13 stainless steel, which has good high-temperature strength and oxidation resistance, can adapt to the high-temperature environment of the hood and extend the service life; the height of the support plate is greater than or equal to 1 / 2 of the height of the hood riser, and can provide sufficient support for the hood riser; the wall thickness of the hood riser is 6mm, and after the support plate improves the stability of the support riser, the material thickness required for the support riser is reduced, which can save material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front cross-sectional view of a preferred embodiment of the utility model;

[0026] Figure 2 It is a top view of the hood riser in the first preferred embodiment of the utility model;

[0027] Figure 3 It is a top view of the hood riser in the second preferred embodiment of the utility model;

[0028] Figure 4 It is a top view of the hood riser in the third preferred embodiment of the utility model.

[0029] In the figure: 1. hood brim; 2. hood riser; 3. support plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the utility model shall fall within the scope of protection of the utility model.

[0031] like Figure 1-Figure 3 As shown:

[0032] First preferred embodiment:

[0033] Please refer to Figure 1 and Figure 2 A central hood of a cooler comprises a cylindrical hood riser 2 and a hood brim 1 fixed to the upper end of the hood riser 2 by a plurality of vertical plates; a circumferential support structure is arranged in the inner cavity of the hood riser 2, and the support structure comprises a plurality of support plates 3 located in a vertical plane; the support plate 3 is provided with a plurality of openings, which can save materials and reduce manufacturing costs while ensuring sufficient strength; wherein:

[0034] The width of each support plate 3 is equal to the radius of the inner cavity of the hood riser 2; the outer wall of each support plate 3 is fixedly connected to the inner surface of the hood riser 2; the inner walls of several support plates 3 are fixedly connected to each other.

[0035] The height of the support plate 3 is greater than or equal to 1 / 2 of the height of the hood riser 2 . In this embodiment, the height of the support plate 3 is preferably 2 / 3 of the height of the hood riser 2 , which can provide sufficient support for the hood riser 2 .

[0036] The wall thickness of the hood riser 2 is 5 mm to 7 mm. In this embodiment, the wall thickness of the hood riser 2 is preferably 6 mm. After the support plate 3 improves the stability of the support riser, the material thickness required for the support riser is reduced.

[0037] The support structure includes three support plates 3, and the angle between two adjacent support plates 3 is 120 degrees; a stable support frame can be formed inside the hood riser 2, further improving the hood's anti-deformation capability.

[0038] The support plate 3 is made of 1Cr13 stainless steel, which has good high-temperature strength and oxidation resistance, can adapt to the high-temperature environment of the hood, and prolongs its service life.

[0039] Second preferred embodiment:

[0040] Please refer to Figure 1 and Figure 3 On the basis of the above-mentioned first embodiment, the support structure includes four support plates 3, and the angle between two adjacent support plates 3 is 90 degrees; a stable support frame can be formed in the hood riser 2, further improving the deformation resistance of the hood.

[0041] Third preferred embodiment:

[0042] Please refer to Figure 1 and Figure 4 On the basis of the first embodiment described above, the support structure includes six support plates 3, and the angle between two adjacent support plates 3 is 60 degrees, which can form a stable support frame inside the hood riser 2, further improving the hood's anti-deformation ability.

[0043] The utility model provides a central hood of a cooler, comprising a cylindrical hood riser 2 and a hood brim 1 fixed to the upper end of the hood riser 2 by a plurality of vertical plates; a circumferential support structure is arranged in the inner cavity of the hood riser 2, and the support structure comprises a plurality of support plates 3 located in a vertical plane; the support plates 3 are provided with a plurality of openings, which can save materials and reduce manufacturing costs under the premise of ensuring sufficient strength; the width of each support plate 3 is equal to the radius of the inner cavity of the hood riser 2; the outer wall of each support plate 3 is fixedly connected to the inner surface of the hood riser 2; the inner walls of a plurality of support plates 3 are fixedly connected to each other. Preferably, the height of the support plate 3 is equal to 2 / 3 of the height of the hood riser 2, which can provide sufficient support for the hood riser 2; the wall thickness of the hood riser 2 is 6 mm, and after the support plate 3 improves the stability of the support riser, the material thickness required for the support riser is reduced.

[0044] Working principle:

[0045] The calcined high-temperature lime enters the cooler from the rotary kiln, and the temperature of the high-temperature lime needs to be lowered through the cooling process; the cylindrical hood riser 2 makes the movement of the lime in the cooler smoother, reducing the risk of material jamming; the high-temperature lime surrounded by the outside of the hood will produce heat radiation and heat conduction to the hood, and the impact and lateral pressure of the lime will also act on the hood. The several support plates inside the hood riser 2 can effectively support and reinforce the hood riser 2, making it less likely to deform and break, thereby extending the service life of the hood; the support plate is provided with a number of openings, which can save materials and reduce manufacturing costs while ensuring sufficient strength.

[0046] During operation, low-temperature air enters the hood riser 2 from the bottom of the hood riser 2, blows out from the air outlet under the hood brim 1, and contacts the high-temperature lime surrounded by the outside of the hood; when the low-temperature air is blown out, it will conduct reverse heat exchange with the external high-temperature lime, and the low-temperature air flow will absorb the heat energy of the lime, causing the lime to gradually cool down; through contact with the high-temperature lime, the air flow is heated, and the air temperature rises significantly to 500°C ~ 700°C, and these high-temperature air flows re-enter the rotary kiln as secondary air.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A central hood of a cooler, comprising a cylindrical hood riser (2), and a hood brim (1) fixed to the upper end of the hood riser (2) by a plurality of vertical plates; characterized in that: A circumferential support structure is arranged in the inner cavity of the hood riser (2), and the support structure comprises a plurality of support plates (3) located in a vertical plane; wherein: The width of each support plate (3) is equal to the radius of the inner cavity of the hood riser (2); the outer wall of each support plate (3) is fixedly connected to the inner surface of the hood riser (2); and the inner walls of a plurality of support plates (3) are fixedly connected to each other; The height of the support plate (3) is greater than or equal to 1 / 2 of the height of the hood riser (2); The wall thickness of the hood riser (2) is 5 mm to 7 mm.

2. The cooler center hood according to claim 1, characterized in that: The support plate (3) is provided with a plurality of openings.

3. The cooler center hood according to claim 1, characterized in that: The support structure comprises three support plates (3), and the angle between two adjacent support plates (3) is 120 degrees.

4. The cooler center hood according to claim 1, characterized in that: The support structure comprises four support plates (3), and the angle between two adjacent support plates (3) is 90 degrees.

5. The cooler center hood according to claim 1, characterized in that: The support structure comprises six support plates (3), and the angle between two adjacent support plates (3) is 60 degrees.

6. The cooler center hood according to claim 1, characterized in that: The height of the support plate (3) is equal to 2 / 3 of the height of the hood riser (2).

7. The center hood of the cooler according to any one of claims 1 to 6, characterized in that: The support plate (3) is made of 1Cr13 stainless steel.

8. The cooler center hood according to claim 1, characterized in that: The wall thickness of the hood riser (2) is 6 mm.

Images