CN203240880U - Waste heat recovery device - Google Patents
Waste heat recovery device Download PDFInfo
- Publication number
- CN203240880U CN203240880U CN2012205801411U CN201220580141U CN203240880U CN 203240880 U CN203240880 U CN 203240880U CN 2012205801411 U CN2012205801411 U CN 2012205801411U CN 201220580141 U CN201220580141 U CN 201220580141U CN 203240880 U CN203240880 U CN 203240880U
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- heat
- chamber
- cover body
- heat recovery
- waste
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model relates to an air heating device, in particular to an air heating device utilizing recovery of surface waste heat of a rotary cement kiln. The air heating device comprises a cover body and two independent chambers separated by a sealing spacer. A set of fins are arranged in the two chambers respectively and used for reinforcing air heat convection. The fins in the second chamber are coated with microwave absorbing coatings used for reinforcing radiant heat exchange. An air inlet and an air outlet are formed in the cover body and respectively connected with the first chamber. According to the technical scheme, two sets of the fins are arranged in the cover body, the fins in the second chamber reinforce heat transfer between the air and the sealing spacer by adopting the ways of radiant heat exchange and heat convection, and obtain the heat from the wall face of the rotary cement kiln, and the heat is transferred to the fins in the first chamber through the sealing spacer to heat the air. As the mixing heat exchange way of radiation and convection is adopted, the waste heat recovery device has the remarkable advantage in efficiency compared with that of heat recovery of traditional convection heat exchange.
Description
Technical field:
The utility model relates to a kind of waste-heat recovery device, specifically relates to the waste-heat recovery device of cement rotary kiln.
Background technology:
The surperficial waste heat of most of cement rotary kilns all is dispersed in the atmosphere naturally, is not utilized effectively.Mostly at present common cement rotary kiln surface heat recovery technology is that heat exchange mode is that heat convection and heat exchange area are very little by the mode (most for directly adding hot-air) of arranging heat exchanger.Traditional cement kiln recuperation of heat mode uses the rotary kiln outer surface as heat-transfer surface, and heat exchange area is not enough, and effect is relatively poor.And because the surface of cement rotary kiln is high temperature, through calculating, be 300 ℃ in the cement kiln surface temperature, when air themperature was 90 ℃, the energy that cement rotary kiln distributes had 65% to be to be dispersed in the atmosphere by thermal-radiating mode, failed effectively to reclaim.The heat recovery technology of traditional heat convection principle, can only absorb 35% energy, simultaneously because traditional heat recovery technology makes water or air as medium, to having relatively high expectations of sealing, so that difficulty strengthens on the realization technique, practicality is not high, can not make the waste heat of kiln surface effectively utilize maximization.
In addition, because the heat exchange efficiency of traditional heat recovery technology is low, can't gives the cooling of cement rotary kiln (running temperature of cement rotary kiln has a scope, can not be too high or excessively low in the situation that the cement rotary kiln surface is overheated.And because inner chemical reaction, the cement rotary kiln surface can be overheated constantly at some, needs forced cooling), the serious consequence that can cause cement rotary kiln to burn
Summary of the invention:
The purpose of this utility model is to provide a kind of air heating apparatus that utilizes cement rotary kiln surface waste heat recovery, and this device can effectively utilize the waste heat on cement rotary kiln surface to add hot-air, good absorbing effect, and practicality is high.
For achieving the above object, the utility model discloses a kind of waste-heat recovery device, comprise columniform rotary kiln body 7, it is characterized in that: the outside of described rotary kiln body 7 also is provided with and is cover body 8 cylindraceous, this cover body 8 surrounds kiln body 7, described cover body 8 inner surfaces surround the first chamber 5 with sealing partition 4, and this first chamber and air inlet 9 and gas outlet 10 are connected to form the passage of circulation of air; Be provided with outer fin 3 between cover body 8 inner surfaces and the sealing partition 4, this outer fin 3 is separated into a plurality of loculuses to the first chamber.When the design of inner rib plate can make heat exchange fluid more early enter the turbulent flow stage, effectively promote the coefficient of heat transfer.And greatly increased heat exchange area.The waste heat of cement rotary kiln is transmitted on the sealing partition by convection current at faster speed.
Be provided with the second chamber 2 between described sealing partition 4 and the kiln body 7, in this second chamber 2, be provided with the inner rib plate 6 that is spoke-type.The design of outer fin from increasing heat exchange area and increasing the form enhanced heat exchange of flow disturbance, makes the waste heat of cement rotary kiln be transmitted to by convection current with the fastest speed and is heated working medium.
Described inner rib plate 6 and outer fin 3 are one to one, and corresponding inner rib plate 6 and outer fin 3 are connected in the inside and outside both sides of sealing partition 4.Main like this is the intensity that increases structure, improves manufacturability.
Described inner rib plate 6 is or/and be provided with salient point or concave point on the outer fin 3.Further increase the heat exchange of fin and air side, improve heat exchange efficiency.Described the first chamber 5 is provided with microwave absorbing coating 11 towards the wall of rotary kiln body 7.Described the second chamber 2 is provided with microwave absorbing coating 11 towards the wall of rotary kiln body 7.The design of microwave absorbing coating is transmitted on the sealing partition waste heat of cement rotary kiln at faster speed by radiation.
The outer wall of described cover body 8 is provided with heat-insulation layer 1.Described cover body 8 is fixed, when rotary kiln body 7 rotates, relatively rotates between cover body 8 and the rotary kiln body 7.
As shown from the above technical solution, the utility model is by being provided with inner rib plate, outer fin and microwave absorbing coating in cover body.Air enters outer chamber by air inlet, constantly absorbs the heat of revolving cement kiln through fin and the coating of the second chamber, thereby air is heated.Owing to adopting the design of inner rib plate, outer fin and the second chamber microwave absorbing coating, comparing traditional heat convection formula waste heat recovery.Heat recovery efficiency is higher, takes full advantage of the surperficial waste heat of cement rotary kiln.
Description of drawings:
Fig. 1 is cutaway view of the present utility model
Fig. 2 is the A-A cutaway view of Fig. 1
Fig. 3 is the partial enlarged drawing of Fig. 1
Fig. 4 is the bump design schematic diagram side view on inner rib plate and the outer fin
Fig. 5 is the bump design schematic diagram front view on inner rib plate and the outer fin
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is described further:
The air heating apparatus that utilizes the surface waste heat recovery of cement kiln rotary furnace as shown in Figure 1 and Figure 2 comprises cover body 8, the first chamber 2, the second chamber 5, heat conduction sealing partition 4.The first chamber 2 inside are provided with outer fin 3, and air inlet 9, gas outlet 10 and the first chamber 2 link to each other, and are used for by heated working medium.
Be provided with inner rib plate 6 and microwave absorbing coating 11 in the second chamber 5, be used for absorbing the heat energy that the cement rotary kiln surface gives out.Cover body is provided with air inlet 9 and gas outlet 10 links to each other with outer chamber respectively.Namely, waste-heat recovery device, comprise columniform rotary kiln body 7, it is characterized in that: the outside of described rotary kiln body 7 also is provided with and is cover body 8 cylindraceous, this cover body 8 surrounds kiln body 7, described cover body 8 inner surfaces surround the first chamber 5 with sealing partition 4, and this first chamber and air inlet 9 and gas outlet 10 are connected to form the passage of circulation of air; Be provided with outer fin 3 between cover body 8 inner surfaces and the sealing partition 4, this outer fin 3 is separated into a plurality of loculuses to the first chamber.
The specifically formation of the first chamber 2 is the outer fins 3 that are spoke-type by being provided with in cover body 8, and the outside of outer fin 3 is provided with cover body 8, and the inboard of outer fin 3 is provided with heat conduction sealing partition 4.Outer fin 3, cover body 8 and heat conduction sealing partition 4 have formed a plurality of parallel working medium passages, and each working medium passage links to each other with gas outlet 10 with air inlet 9 respectively.That is, be provided with the second chamber 2 between sealing partition 4 and the kiln body 7, in this second chamber 2, be provided with the outer fin 3 that is spoke-type.
Working medium evenly enters the first chamber 2, the first chambers, 2 interior mobile working medium and the 3 abundant heat exchange of outer fin by air inlet 9, becomes at last high temperature refrigerant and is discharged by gas outlet 10, causes in the heat-needing facilities such as boiler, fan coil.As preferred version of the present utility model, select to adopt outer fin 3, can strengthen the surface area of the first chamber 2, working medium can be contacted with the first chamber 2 fully, strengthen the heat transfer of the first chamber 2 and working medium.
Preferred version of the present utility model, the second chamber 5 adopts inner rib plate 6 designs, in order to improve structural strength, improves manufacturability, described inner rib plate 6 and outer fin 3 are one to one, and corresponding inner rib plate 6 and outer fin 3 are connected in the inside and outside both sides of sealing partition 4.Enlarge simultaneously the heat exchange area of inner cavity chamber, the heat convection between the air of reinforced cementitious rotary kiln surface and the heat conduction sealing partition 4 can be reclaimed the heat on cement rotary kiln surface timely.For improving the heat absorption efficiency of the first chamber 5 and the second chamber 2, the first chamber 5 is provided with microwave absorbing coating 11 towards the wall of rotary kiln body 7, also can be provided with microwave absorbing coating 11 towards the wall of rotary kiln body 7 at the second chamber 2.
Preferred version of the present utility model, inner rib plate, outer fin all adopt bump design, have effectively enlarged heat exchange area, and can increase heat convection efficient by the mode that increases flow disturbance.Because the heat exchange between air and the waste-heat recovery device is the point of thermal resistance maximum, so, improve its heat exchange efficiency and can significantly increase whole heat exchange efficiency.
Preferred version of the present utility model, cover body 8 is cylindric, and rotary kiln surface is all surrounded, and has so higher heat recovery rate.
Preferred version of the present utility model is provided with heat-insulation layer 1 at the cover body outer wall, and heat-insulation layer can prevent that waste heat runs off.
Above-described embodiment only is through line description to preferred embodiment of the present utility model; be not that scope of the present utility model is limited through row; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (8)
1. waste-heat recovery device, comprise columniform rotary kiln body (7), it is characterized in that: the outside of described rotary kiln body (7) also is provided with and is cover body cylindraceous (8), this cover body (8) surrounds kiln body (7), described cover body (8) inner surface surrounds the first chamber (5) with sealing partition (4), and this first chamber and air inlet (9) and gas outlet (10) are connected to form the passage of circulation of air; Be provided with outer fin (3) between cover body (8) inner surface and the sealing partition (4), this outer fin (3) is separated into a plurality of loculuses to the first chamber.
2. waste-heat recovery device according to claim 1, it is characterized in that: be provided with the second chamber (2) between described sealing partition (4) and the kiln body (7), in this second chamber (2), be provided with the inner rib plate (6) that is spoke-type.
3. waste-heat recovery device according to claim 2, it is characterized in that: described inner rib plate (6) and outer fin (3) are one to one, and corresponding inner rib plate (6) and outer fin (3) are connected in the inside and outside both sides of sealing partition (4).
4. waste-heat recovery device according to claim 2, it is characterized in that: described inner rib plate (6) is or/and be provided with salient point or concave point on the outer fin (3).
5. waste-heat recovery device according to claim 1, it is characterized in that: described the first chamber (5) is provided with microwave absorbing coating (11) towards the wall of rotary kiln body (7).
6. waste-heat recovery device according to claim 2, it is characterized in that: described the second chamber (2) is provided with microwave absorbing coating (11) towards the wall of rotary kiln body (7).
7. each described waste-heat recovery device in 6 according to claim 1, it is characterized in that: the outer wall of described cover body (8) is provided with heat-insulation layer (1).
8. waste-heat recovery device according to claim 6 is characterized in that: described cover body (8), relatively rotates between cover body (8) and the rotary kiln body (7) when rotary kiln body (7) rotates for fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205801411U CN203240880U (en) | 2012-10-29 | 2012-10-29 | Waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205801411U CN203240880U (en) | 2012-10-29 | 2012-10-29 | Waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203240880U true CN203240880U (en) | 2013-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205801411U Expired - Fee Related CN203240880U (en) | 2012-10-29 | 2012-10-29 | Waste heat recovery device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203240880U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737596A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Heat recycling device for surface of rotary cement kiln |
| CN105737592A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Surface heat recycling device of rotary kiln |
| CN105737595A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Surface heat recycling device of rotary cement kiln |
| CN105737627A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Surface heat recovery device of cement production rotary kiln |
| CN106247813A (en) * | 2016-08-30 | 2016-12-21 | 博广热能股份有限公司 | A kind of slewing surface waste-heat recovery device and recovery method |
-
2012
- 2012-10-29 CN CN2012205801411U patent/CN203240880U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737596A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Heat recycling device for surface of rotary cement kiln |
| CN105737592A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Surface heat recycling device of rotary kiln |
| CN105737595A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Surface heat recycling device of rotary cement kiln |
| CN105737627A (en) * | 2016-03-30 | 2016-07-06 | 南宁砼材科技有限责任公司 | Surface heat recovery device of cement production rotary kiln |
| CN106247813A (en) * | 2016-08-30 | 2016-12-21 | 博广热能股份有限公司 | A kind of slewing surface waste-heat recovery device and recovery method |
| CN106247813B (en) * | 2016-08-30 | 2018-05-08 | 博广环保技术股份有限公司 | A kind of slewing surface waste-heat recovery device and recovery method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20151029 |
|
| EXPY | Termination of patent right or utility model |