Rotary kiln cylinder surface radiant heat recovery device

Abstract

The utility model relates to the field of waste heat recovery, and discloses a rotary kiln barrel surface radiant heat recovery device which is arranged between two wheel belts of a barrel and comprises a heat collection cover and a heat absorption pipe arranged in the heat collection cover. The heat collecting cover is a semicircular cover and covers the upper part of the cylinder body; the heat absorption pipe is composed of a plurality of arc-shaped heat absorption pipe sets which are distributed in the axial direction of the barrel at equal intervals, and the arc-shaped heat absorption pipe sets are connected in series end to end. Each arc-shaped heat absorption pipe set comprises a fixed section fixedly installed in the heat collection cover and movable sections which are movably connected with the two ends of the fixed section in a telescopic and sealed mode. The heat absorption pipe is designed to be of the arc-shaped telescopic structure, the movable section of the heat absorption pipe extends out after installation, heat energy of the lower half portion of the barrel can be absorbed, the heat absorption area of the heat absorption pipe is increased, the heat energy utilization rate of radiant heat of the barrel is improved, and meanwhile normal heat dissipation of the barrel is not affected too much.

Description

Technical Field

[0001] The utility model relates to the field of waste heat recovery, in particular to a rotary kiln cylinder surface radiation heat recovery device. Background Art

[0002] In the field of ore smelting, the rotary kiln is an important roasting equipment. During the roasting process of the material, the cylinder of the rotary kiln will emit a large amount of heat to the outside. Currently, this part of the heat is mainly recycled by the heat collecting hood.

[0003] There are two main types of heat collecting covers at present: one is a semicircular heat collecting cover, which is installed above the cylinder; the other is a fully enclosed heat collecting cover, which completely wraps the cylinder. The former has a limited absorption area due to the semicircular shape of the heat collecting cover, and the heat energy around the cylinder below cannot be utilized; the latter can fully utilize the heat, but it will lead to poor heat dissipation of the cylinder, which will have an adverse effect on the burning zone.

[0004] Based on this, the present application provides a rotary kiln cylinder surface radiation heat recovery device. Utility Model Content

[0005] The utility model aims to solve the technical problems existing in the prior art. To this end, the utility model provides a rotary kiln cylinder surface radiation heat recovery device.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] Provided is a rotary kiln cylinder surface radiation heat recovery device, which is arranged between two wheel belts of the cylinder and comprises a heat collecting cover and a heat absorbing pipe arranged in the heat collecting cover; the heat collecting cover is a semicircular cover, which is arranged above the cylinder; the heat absorbing pipe is composed of a plurality of arc-shaped heat absorbing pipe groups distributed at equal intervals along the axial direction of the cylinder, and each arc-shaped heat absorbing pipe group is connected in series end to end; each arc-shaped heat absorbing pipe group comprises a fixed section fixedly installed in the heat collecting cover and a movable section respectively connected to the two ends of the fixed section in a telescopic and movable sealing manner.

[0008] Preferably, the water inlet is arranged at the end of the movable section at the front end of the heat absorption tube, and the water outlet is arranged at the end of the movable section at the rear end of the heat absorption tube.

[0009] Preferably, the fixing section is semicircular, passes through a mounting block welded in the heat collecting cover and is fixed in the heat collecting cover, and the fixing section is connected to the mounting block by welding.

[0010] Preferably, multiple sets of sealing rings are provided on the outer walls at both ends of the fixed section.

[0011] Preferably, both sides of the heat collecting cover are provided with inwardly folded flanges, one end of the movable section connected with the fixed section is provided with a flange plate, and the movable section passes through the flange and is limited on the flange by the flange plate.

[0012] Preferably, semicircular ribs are provided at both ends of the heat collecting cover.

[0013] Preferably, the inner wall of the heat collecting cover is also lined with a heat reflecting plate.

[0014] Preferably, the heat absorbing tube is a round tube, a square tube or a flat tube, and its surface is treated with high temperature resistant black paint for corrosion protection.

[0015] Preferably, arc-shaped second heat reflecting plates are provided on both sides of the cylinder, and the second heat reflecting plates are fixed on the movable bracket.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model designs the heat absorption tube as an arc-shaped telescopic structure. After installation, the movable section of the heat absorption tube is extended to absorb the heat energy of the lower half of the cylinder, thereby increasing the heat absorption area of ​​the heat absorption tube and improving the thermal energy utilization rate of the radiant heat of the cylinder, while also not affecting the normal heat dissipation of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 It is a structural cross-sectional view of the rotary kiln cylinder surface radiation heat recovery device provided by the utility model before installation;

[0020] Figure 2 It is a structural cross-sectional view of the rotary kiln cylinder surface radiation heat recovery device provided by the utility model after installation;

[0021] Figure 3 yes Figure 2 Left view provided;

[0022] Figure 4 yes Figure 2 Right view provided;

[0023] Figure 5 This is a structural diagram of the connection between the fixed section and the movable section of the arc-shaped heat absorbing tube group provided by the utility model;

[0024] Figure 6It is a schematic diagram of the installation of the second heat reflecting plate provided by the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] Heat collecting cover 1, mounting block 1.1, flange 1.2, rib plate 1.3, heat absorbing tube 2, arc-shaped heat absorbing tube group 2.1, fixed section 2.1.1, movable section 2.1.2, short section 2.2, sealing ring 3, flange plate 4, heat reflecting plate 5, second heat reflecting plate 6, movable bracket 7. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific position, be constructed and operate in a specific position, and therefore should not be understood as limiting the present invention;

[0030] In addition, the descriptions involving the terms "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Embodiment 1

[0033] This embodiment provides a rotary kiln shell surface radiation heat recovery device, as shown in the attached Figure 1 To Attachment Figure 4 As shown, it is arranged between the two wheel belts of the cylinder, including a heat collecting cover 1 and a heat absorbing tube 2 arranged in the heat collecting cover; the heat collecting cover 1 is a semicircular cover, which is arranged above the cylinder; the heat absorbing tube 2 is composed of a plurality of groups of arc-shaped heat absorbing tube groups 2.1 distributed at equal intervals along the axial direction of the cylinder, and each group of arc-shaped heat absorbing tube groups 2.1 is connected in series end to end, and the arc-shaped heat absorbing tube groups are specifically connected end to end through a short section 2.2.

[0034] Preferably, each group of the arc-shaped heat absorbing tube group 2.1 comprises a fixed section 2.1.1 fixedly installed in the heat collecting cover 1 and a movable section 2.1.2 respectively connected to the two ends of the fixed section 2.1.1 in a telescopic and movable sealing manner. The outer walls of the two ends of the fixed section 2.1.1 are provided with multiple groups of sealing rings 3, as shown in the attached Figure 5 As shown, the fixed section 2.1.1 is inserted into the movable section 2.1.2 and radially sealed by the sealing ring 3; the water inlet is set at the end of the movable section 2.1.2 at the front end of the heat absorption tube 2, and the water outlet is set at the end of the movable section 2.1.2 at the rear end of the heat absorption tube 2. This design allows the movable section to be retracted into the heat collection cover, as shown in the attached Figure 1 As shown, it is convenient for the installation of the device; after the device is installed, the movable end can be extended, and the extended movable section can absorb the heat energy of the lower half of the cylinder, increasing the heat absorption area of ​​the heat absorption tube and improving the thermal energy utilization rate of the radiant heat of the cylinder. At the same time, this design will not affect the normal heat dissipation of the cylinder.

[0035] Preferably, the fixing section 2.1.1 is semicircular, and penetrates through the mounting block 1.1 welded in the heat collecting cover 1 and is fixed in the heat collecting cover 1. The fixing section 2.1.1 is welded to the mounting block 1.1 to ensure the position stability of the fixing section.

[0036] Preferably, the heat collecting cover 1 is provided with inwardly folded flanges 1.2 on both sides, the movable section 2.1.2 is provided with a flange plate 4 at one end plugged with the fixed section 2.1.1, and the movable section 2.1.2 passes through the flange 1.2 and is limited on the flange 1.2 by the flange plate 4. This design can use the flange of the heat collecting cover to limit the limit position of the movable section, and can effectively prevent the movable section from falling out.

[0037] Preferably, semicircular ribs 1.3 are provided at both ends of the heat collecting cover 1 to increase the structural strength of the heat collecting cover.

[0038] Preferably, the inner wall of the heat collecting cover 1 is also lined with a heat reflecting plate 5 for reflecting radiant heat energy. The heat reflecting plate can be used to reflect the heat energy on the back of the heat absorbing tube to increase the heat absorbing capacity of the heat absorbing tube.

[0039] Preferably, the heat absorbing tube 2 is a round tube, a square tube or a flat tube, and its surface is treated with high temperature resistant black paint for corrosion protection, increasing the blackness of the heat absorbing tube to reduce its reflectivity.

[0040] Embodiment 2

[0041] Based on the first embodiment, as shown in the attached Figure 6 As shown, arc-shaped second heat reflecting plates 6 are provided on both sides of the cylinder, and the second heat reflecting plates 6 are fixed on the movable bracket 7. The second heat reflecting plates of this embodiment can reflect the heat energy of the lower part of the cylinder to the back of the movable section of the heat absorbing pipe, thereby increasing the heat absorption capacity of the heat absorbing pipe. The second heat reflecting plates are installed on the movable bracket, which is convenient for rapid transfer during the equipment maintenance stage.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A rotary kiln cylinder surface radiation heat recovery device, arranged between two belts of the cylinder, comprising a heat collecting cover and a heat absorbing pipe arranged in the heat collecting cover; characterized in that: The heat collecting cover is a semicircular cover, which is arranged above the cylinder; The heat absorbing tubes are composed of a plurality of arc-shaped heat absorbing tube groups distributed at equal intervals along the axial direction of the cylinder, and each arc-shaped heat absorbing tube group is connected in series head to tail; Each group of the arc-shaped heat absorbing tube groups comprises a fixed section fixedly installed in the heat collecting cover and a movable section respectively connected to two ends of the fixed section in a telescopic and movable sealing manner.

2. The rotary kiln shell surface radiation heat recovery device according to claim 1 is characterized in that: The water inlet is arranged at the end of the movable section at the front end of the heat absorbing tube, and the water outlet is arranged at the end of the movable section at the rear end of the heat absorbing tube.

3. The rotary kiln shell surface radiation heat recovery device according to claim 1, characterized in that: The fixing section is semicircular in shape, penetrates through a mounting block welded in the heat collecting cover and is fixed in the heat collecting cover, and the fixing section is connected to the mounting block by welding.

4. The rotary kiln shell surface radiation heat recovery device according to claim 3 is characterized in that: The outer walls at both ends of the fixed section are provided with multiple sets of sealing rings.

5. The rotary kiln shell surface radiation heat recovery device according to claim 3 is characterized in that: Both sides of the heat collecting cover are provided with inwardly folded flanges, one end of the movable section plugged with the fixed section is provided with a flange plate, and the movable section passes through the flange and is limited on the flange by the flange plate.

6. The rotary kiln shell surface radiation heat recovery device according to claim 5, characterized in that: Semicircular rib plates are also provided at both ends of the heat collecting cover.

7. The rotary kiln shell surface radiation heat recovery device according to claim 1, characterized in that: The inner wall of the heat collecting cover is also lined with a heat reflecting plate.

8. The rotary kiln shell surface radiation heat recovery device according to claim 7, characterized in that: The heat absorbing tube is a round tube, a square tube or a flat tube, and its surface is treated with high temperature resistant black paint for corrosion protection.

9. The rotary kiln shell surface radiation heat recovery device according to any one of claims 1 to 8, characterized in that: Arc-shaped second heat reflecting plates are also arranged on both sides of the cylinder, and the second heat reflecting plates are fixed on the movable bracket.

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