CN219757019U - Kiln head waste heat recovery device - Google Patents
Kiln head waste heat recovery device Download PDFInfo
- Publication number
- CN219757019U CN219757019U CN202321195337.3U CN202321195337U CN219757019U CN 219757019 U CN219757019 U CN 219757019U CN 202321195337 U CN202321195337 U CN 202321195337U CN 219757019 U CN219757019 U CN 219757019U
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- Prior art keywords
- kiln head
- kiln
- air
- recovery device
- waste heat
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- 239000002918 waste heat Substances 0.000 title claims abstract description 24
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 7
- 230000007704 transition Effects 0.000 description 6
- 238000001354 calcination Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model discloses a kiln head waste heat recovery device, and belongs to the technical field of rotary kilns; the method is characterized in that: the outer wall of the rotary kiln is fixedly connected with the inner side of the friction ring; the kiln head cover is fixedly connected with one end of the spring piece; the other end of the spring piece is lapped on the outer surface of the friction ring; the kiln head end of the kiln head cover and the heat collecting cover are fixedly connected; the heat collection cover, the rotary kiln, the spring piece and the friction ring form an annular closed space for heat exchange; one port of the air pipe is connected with an air inlet of the combustion fan, and the other port of the air pipe penetrates through the shell of the heat collection cover and then is communicated with the annular closed space; the air outlet of the cooling fan is communicated with the annular closed space through an air guide groove, and the air outlet of the combustion-supporting fan is connected with the burner through a pipeline. According to the utility model, the cooling fan is arranged to blow air into the heat exchange structure, so that the waste heat of the kiln head of the rotary kiln is utilized to obtain the needed combustion-supporting air, thereby saving energy and having good energy-saving, environment-friendly and economic benefits.
Description
Technical Field
The utility model belongs to the technical field of rotary kilns, and particularly relates to a kiln head waste heat recovery device.
Background
The rotary kiln is widely applied to calcination of cement, metallurgy and chemical materials, and the application history of the rotary kiln is over 100 years. The sealing of the two ends of the rotary kiln is closely related to the rotary kiln cylinder, and the rotary kiln cylinder and the kiln head cover are usually sealed by spring-sheet type (commonly called as fish scale type sealing).
The spring piece type sealing mode is to fix one end of a spring piece serving as a sealing piece on a kiln head cover fixing peripheral ring corresponding to the tail end of a rotary kiln cylinder, and the other end of the spring piece is a movable end. The end section cylinder of the rotary kiln cylinder is provided with a coaxial cylinder, namely a friction ring, sleeved outside the end section cylinder, the friction ring is fixed on the cylinder, the friction ring is fixedly connected with a section of transition cylinder, the transition cylinder is connected with a heat-resistant steel guard plate of the rotary kiln end in a natural hooking manner to form an approximately blind cold air sleeve formed by the rotary kiln end section cylinder, the heat-resistant steel guard plate, the transition section cylinder and the friction ring, and the blower blows air to the cold air sleeve for cooling. The movable end is elastically tensioned on the friction ring, so that the transition section cylinder, the friction ring, the fixed peripheral ring provided with the spring piece and the spring piece form a sealing structure, and the spring piece is still tightly attached to the friction ring when the rotary kiln rotates and axially moves, thereby realizing the sealing purpose.
However, the cooling air blown to the cold air sleeve by the blower carries heat energy to be released into the air, which is a waste of energy; the heat-resistant steel guard plate and the transition section cylinder or the friction ring are inconsistent in thermal expansion, and a certain interval expansion gap is reserved between the heat-resistant steel guard plate and the transition section cylinder or the friction ring, so that hot air in the rotary kiln body overflows. Therefore, it is necessary to recover this hot air, i.e., waste heat, to save energy.
Disclosure of Invention
The utility model aims to meet the actual demand, and provides a kiln head waste heat recovery device which improves the utilization efficiency of resources by recovering waste heat of cooling air at the kiln head part of a rotary kiln and hot air overflowed from the kiln head part.
The device specifically comprises: the kiln comprises a combustion-supporting fan, an air pipe, a burner, a kiln head cover, a spring piece, a friction ring, a rotary kiln, an air guide groove, a cooling fan, a heat collecting cover and a supporting base.
The connection mode is as follows: the outer wall of the rotary kiln is fixedly connected with the inner side of the friction ring; the kiln head cover is fixedly connected with one end of the spring piece; the other end of the spring piece is lapped on the outer surface of the friction ring; the kiln head ends of the kiln head cover and the heat collecting cover are fixedly connected; the heat collection cover, the rotary kiln, the spring piece and the friction ring form an annular closed space for heat exchange; one port of the air pipe is connected with an air inlet of the combustion fan, and the other port of the air pipe penetrates through the shell of the heat collection cover and then is communicated with the annular closed space; the air outlet of the cooling fan is communicated with the annular closed space through an air guide groove, and the air outlet of the combustion-supporting fan is connected with the burner through a pipeline.
In the scheme of the kiln head waste heat recovery device, the heat collection cover comprises a shell with a cylindrical cavity structure; a left round hole is formed in the left side face of the shell, and a right round hole is formed in the right side face of the shell; the inner diameter of the left round hole is larger than that of the right round hole; the minimum clearance between the inner diameter of the right round hole and the outer wall of the rotary kiln is 4mm; the left side face of the heat collection cover is a kiln head end.
In the scheme of the kiln head waste heat recovery device, the connecting line of the center points of the left round hole and the right round hole is overlapped with the rotation center shaft of the rotary kiln (7).
In the scheme of the kiln head waste heat recovery device, the number of the cooling fans is 2.
In the scheme of the kiln head waste heat recovery device, the air pipe is provided with the regulating valve.
In the scheme of the kiln head waste heat recovery device, the regulating valve is an electric valve.
In the scheme of the kiln head waste heat recovery device, the thickness of the spring piece is 1mm-4mm.
The utility model has the advantages and positive effects that:
based on the technical scheme, an annular closed space is arranged outside the rotary kiln, and the annular closed space is formed by a heat collecting cover, the rotary kiln, a spring piece and a friction ring; the annular airtight space is communicated with the combustion-supporting fan, so that the waste heat of cooling air at the kiln head part of the rotary kiln and the overflowed hot air at the kiln head part are recovered, and the gas is blown into the burner, so that the energy is saved, the calcining efficiency is improved, and the energy-saving, environment-friendly and economic benefits are good.
Drawings
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model.
FIG. 1 shows a schematic diagram of an embodiment of the present utility model;
FIG. 2 illustrates a partial view of an embodiment of the present utility model showing the relationship of the air chute, cooling fan and annular enclosure.
In the figure: 1. a combustion fan; 2. an air duct; 3. a burner; 4. a kiln head cover; 5. a spring piece; 6. a friction ring; 7. a rotary kiln; 8. an air guide groove; 9. a cooling fan; 10. a heat collecting cover; 11. and a support base.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
In the description of the utility model, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the utility model.
In the description of the utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present utility model can be understood by those of ordinary skill in the art in a specific case.
Examples
As shown in fig. 1, the kiln head waste heat recovery device provided by the utility model comprises: the device comprises a combustion-supporting fan 1, an air pipe 2, a combustor 3, a kiln hood 4, a spring piece 5, a friction ring 6, a rotary kiln 7, an air guide groove 8, a cooling fan 9, a heat collecting hood 10 and a supporting base 11.
The connection mode is as follows: the outer wall of the rotary kiln 7 is fixedly connected with the inner side of the friction ring 6; the kiln head cover 4 is fixedly connected with one end of the spring piece 5; the other end of the spring piece 5 is lapped on the outer surface of the friction ring 6; the kiln head ends of the kiln head cover 4 and the heat collecting cover 10 are fixedly connected; the heat collection cover 10, the rotary kiln 7, the spring piece 5 and the friction ring 6 form an annular airtight space for heat exchange; one port of the air pipe 2 is connected with an air inlet of the combustion fan 1, and the other port of the air pipe penetrates through the shell of the heat collection cover 10 and then is communicated with the annular closed space; the air outlet of the combustion-supporting fan 1 is connected with the burner 3 through a pipeline; as shown in fig. 2, the air outlet of the cooling fan 9 is communicated with the annular closed space through an air guide groove 8.
Wherein the heat collecting cover 10 is supported by the support base 11; the heat collecting cover 10 comprises a shell with a cylindrical cavity structure, wherein a left round hole is formed in the left side surface of the shell, and a right round hole is formed in the right side surface of the shell; the left side surface of the heat collecting cover 10 is the kiln head end.
In this embodiment, the inner diameter of the left circular hole of the heat collecting cover 10 is larger than the inner diameter of the right circular hole, and the connecting line of the center points of the left circular hole and the right circular hole coincides with the rotation center shaft of the rotary kiln 7, and the minimum gap between the inner diameter of the right circular hole and the outer wall of the rotary kiln 7 is 4mm.
The annular closed space formed by the heat collecting cover 10, the rotary kiln 7, the spring piece 5 and the friction ring 6 is called a heat exchange structure, and the rotary sealing between the rotary kiln cylinder and the kiln head cover is realized by tightly attaching the spring piece 5 and the friction ring 6 so as to reduce convection of gas inside and outside the kiln and influence the stability of the thermal system of the rotary kiln.
The cooling fan 9 is used for introducing natural air to radiate heat for the kiln body, so that the heat in the kiln is prevented from radiating outwards through the wall of the kiln, and the body of an operator is prevented from being damaged.
The combustion fan 1 serves to feed combustion air to the burner 3, which burner 3 heats up the material to the desired temperature by radiating it through the flame.
The working principle of the preferred embodiment is as follows:
the burner 3 is utilized to provide a heat source for the calcination product in the rotary kiln 7, and in the calcination process, the rotary kiln 7 is heated and dissipates heat through the outer wall of the rotary kiln 7; the air outlet of cooling fan 9 blows normal atmospheric temperature air into annular airtight space through wind guiding groove 8, and normal atmospheric temperature air carries out the heat exchange with rotary kiln 7 in annular airtight space, and normal atmospheric temperature air is preheated and forms preheated air, and the hot gas after heating is in the effect of combustion-supporting fan 1, through tuber pipe 2, gets into combustor 3, mixes with fuel after the blowout of combustor 3, can improve the temperature of flame, and then improves the quality of calcining the product in the rotary kiln 7.
Preferably, in order to satisfy the temperature range of the burner-ejected air, a regulating valve, such as an electric valve, may be provided on the air duct 2. The amount of the preheated air is controlled by adjusting the electric valve, the air speed of the cooling fan 9 is adjusted to control the amount of the normal-temperature air, and the amount of the preheated air and the air speed of the cooling fan 9 reach the required proportion, so that the combustion air with different flow rates is obtained. If the wind speed of the cooling fan 9 is not adjustable, the same electric valve can be arranged on the wind guide groove 8 for control.
Preferably, the number of the cooling fans 9 is 2, and the thickness of the spring piece 5 is 1mm-4mm; the combustion-supporting fan 1 is a Roots fan, and the type of the electric valve is 710E-361RSD-150JIS 10K.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (8)
1. Kiln head waste heat recovery device, its characterized in that includes combustion-supporting fan (1), tuber pipe (2), combustor (3), kiln head hood (4), spring leaf (5), friction ring (6), rotary kiln (7), wind-guiding groove (8), cooling fan (9), heat collecting cover (10), wherein:
the outer wall of the rotary kiln (7) is fixedly connected with the inner side of the friction ring (6);
the kiln head cover (4) is fixedly connected with one end of the spring piece (5);
the other end of the spring piece (5) is lapped on the outer surface of the friction ring (6);
the kiln head end of the kiln head cover (4) and the heat collecting cover (10) are fixedly connected;
the heat collection cover (10), the rotary kiln (7), the spring piece (5) and the friction ring (6) form an annular airtight space for heat exchange;
one port of the air pipe (2) is connected with an air inlet of the combustion fan (1), and the other port of the air pipe penetrates through the shell of the heat collection cover (10) and then is communicated with the annular closed space;
the air outlet of the cooling fan (9) is communicated with the annular closed space through an air guide groove (8), and the air outlet of the combustion-supporting fan (1) is connected with the burner (3) through a pipeline.
2. Kiln head waste heat recovery device according to claim 1, characterized in that the heat collection hood (10) comprises a shell of cylindrical cavity structure; a left round hole is formed in the left side face of the shell, and a right round hole is formed in the right side face of the shell; the inner diameter of the left round hole is larger than that of the right round hole; the minimum clearance between the inner diameter of the right round hole and the outer wall of the rotary kiln (7) is 4mm; the left side face of the heat collection cover (10) is a kiln head end.
3. The kiln head waste heat recovery device according to claim 2, wherein the connecting line of the center points of the left round hole and the right round hole coincides with the rotation center shaft of the rotary kiln (7).
4. Kiln head waste heat recovery device according to claim 1, characterized in that the number of cooling fans (9) is 2.
5. Kiln head waste heat recovery device according to claim 1, characterized in that the air duct (2) is provided with a regulating valve.
6. The kiln head waste heat recovery device of claim 5, wherein the regulating valve is an electrically operated valve.
7. The kiln head waste heat recovery device according to claim 6, wherein the electric valve is 710E-361RSD-150jis 10k.
8. Kiln head waste heat recovery device according to claim 1, characterized in that the thickness of the leaf spring (5) is 1-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321195337.3U CN219757019U (en) | 2023-05-17 | 2023-05-17 | Kiln head waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321195337.3U CN219757019U (en) | 2023-05-17 | 2023-05-17 | Kiln head waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219757019U true CN219757019U (en) | 2023-09-26 |
Family
ID=88092576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321195337.3U Active CN219757019U (en) | 2023-05-17 | 2023-05-17 | Kiln head waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219757019U (en) |
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2023
- 2023-05-17 CN CN202321195337.3U patent/CN219757019U/en active Active
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