CN204987070U - A air duct cross -over connection structure for making up formula air heater - Google Patents
A air duct cross -over connection structure for making up formula air heater Download PDFInfo
- Publication number
- CN204987070U CN204987070U CN201520460261.1U CN201520460261U CN204987070U CN 204987070 U CN204987070 U CN 204987070U CN 201520460261 U CN201520460261 U CN 201520460261U CN 204987070 U CN204987070 U CN 204987070U
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- CN
- China
- Prior art keywords
- fan housing
- temperature section
- high temperature
- air
- preheater
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model belongs to the air heater field, concretely relates to an air duct cross -over connection structure for making up formula air heater is the cover body of compriseing high temperature section fan housing and low temperature section fan housing, and the high temperature section that corresponds the pre -heater and the connection zone of low temperature section set up leak - proof plate at cover body middle part, and leak - proof plate and the internal wall of cover can make the air by the passageway of low temperature section fan housing flow direction high temperature section fan housing around forming, set up arc water conservancy diversion structure in the high temperature section fan housing. Can make air evenly distributed in the high temperature section air inlet of pre -heater through arc water conservancy diversion structure, reduce the air take off the wall flow move with the production of the vortex, reduce the flow resistance loss, guarantee combination formula air heater's high efficiency, steady operation.
Description
Technical field
The utility model relates to a kind of air duct cross-over configurations for Combined air preheater, belongs to air preheater field.
Background technology
Combined air preheater is used for Mist heat recovering burning required air, belongs to waste heat recovery apparatus.Combined air preheater is made up of low-temperature zone and high temperature section; High temperature section belongs to full-welding plate-type heat exchanger, has the features such as heat transfer efficiency is high, compact conformation, and for recovered flue gas major part heat, flue-gas temperature can be down to 160 DEG C; Low-temperature zone belongs to enamel pipe heat exchanger, and heat exchanger tube adopts enamel pipe, and prevent the generation of flue gas low-temperature dew point corrosion, flue-gas temperature can be down to below dew point corrosion temperature.
Low-temperature zone and high temperature section air preheater mounted on top, flue gas flows through high temperature section and low-temperature zone in turn; Air to be heated is contrary with flow direction in high temperature section in low-temperature zone, needs to be connected with expanding ell by 1 90 ° of shrinkage type ell.90 ° of elbow Bottomhole pressure are comparatively complicated, there are two symmetrical vortices.
When air flows in low-temperature zone fan housing after enamel pipe preheating, air flow channel overflow section increases, and violent turbulent closure scheme occurs in flowing.In low-temperature zone fan housing, because air-flow direction rotates clockwise 90 °, thus produce centrifugal force, cause the outer wall pressure increase of fan housing turning section, inner wall pressure to reduce, namely occur that diffusion effect appears in outer wall, and blockage effect appears in inwall.At low-temperature zone fan housing outlet inside wall place, air occurs that blockage effect appears in diffusion effect and outer wall place, namely near fan housing outside wall surface, air velocity is higher than inwall place air velocity, and inwall place air flows out now de-wall flowing.In shrinkage type ell, the eddy current that the pressure loss is formed primarily of inwall causes.When the corner of ell inwall is 90 °, the region that fluid is separated after turning can reach more than 1/2 of ell width.
Air flows into high temperature section fan housing by low-temperature zone fan housing, there is blockage effect at the exit outer wall of expanding ell, diffusion effect appears in internal face, thus cause inflow air preheater high temperature section air velocity inequality and drag losses to increase, cause high temperature section heat exchange efficiency to reduce, in plate, local resistance loss is excessive.
For reduce flow into air preheater air unevenness, reduce drag losses, current common way is that inside and outside for shrinkage type ell wall is done camber, but effect not obvious.
Utility model content
According to above deficiency of the prior art, the technical problems to be solved in the utility model is: provide a kind of and can reduce the unevenness flowing into air preheater high temperature section air, the air duct cross-over configurations for Combined air preheater reducing air drag loss.
Air duct cross-over configurations for Combined air preheater described in the utility model, the cover body be made up of high temperature section fan housing and low-temperature zone fan housing, the corresponding high temperature section of preheater and the join domain of low-temperature zone arrange Antileaking plate in the middle part of cover body, Antileaking plate and cover body inwall can make air flow to the passage of high temperature section fan housing by low-temperature zone fan housing around being formed, and arrange arc flow-guiding structure in high temperature section fan housing.
In the utility model, arc flow-guiding structure is made up of some arc deflectors be bent upwards, and the two ends of arc deflector are fixed on the inwall of high temperature section fan housing arranged on left and right sides plate.Preferably, along high temperature section fan housing away from the top margin of preheater to the diagonal plane on base near preheater, arc deflector is evenly arranged.High temperature section fan housing can be divided into some runners and air is led by some arc deflectors, air is made to be partial to the inwall flowing of high temperature section fan housing thus to make air be uniformly distributed in the high temperature section air intake of preheater, reduce the de-wall flowing of air and the generation of eddy current, reduce fluid resistance loss.
Wherein, arc deflector is formed along short side direction is bending by straight plate, the two ends on the long limit of straight plate are welded on the inwall of high temperature section fan housing arranged on left and right sides plate respectively, and after bending, the radius of the arc that minor face is formed is 200mm ~ 500mm, and the central angle of this arc is 60 ° ~ 90 °; The quantity of arc deflector is 10 ~ 20.
Above-mentioned low-temperature zone fan housing arranges flow guiding inclined plate, and flow guiding inclined plate is by downward-sloping away from preheater one laterally closer preheater side.Low-temperature zone fan housing bottom flows into the air of high temperature section fan housing under the water conservancy diversion of flow guiding inclined plate, upwards flows in the wall area along low-temperature zone fan housing, avoids occurring that air impacts the Biased flow phenomenon that crushing that high temperature section fan housing causes is excessive and produce.Preferably 30 ° ~ 60 °, the angle of inclination of flow guiding inclined plate.
Except above-mentioned points, the utility model also installs reinforcement on cover body outer wall, to strengthen the stability of cover body; For the ease of being connected with preheater by cover body, the flange be connected with preheater is set in the position that cover body outer rim contacts with preheater; In the utility model, high temperature section fan housing and the low-temperature zone fan housing of cover body can adopt one to be connected, and also can adopt Split type structure, preferably, be connected between high temperature section fan housing and low-temperature zone fan housing by adpting flange.
The beneficial effect that the utility model is compared with prior art had is:
In this air duct cross-over configurations, air can be made to be uniformly distributed in the high temperature section air intake of preheater by arc flow-guiding structure, reduce the de-wall flowing of air and the generation of eddy current, reduce fluid resistance loss, ensure efficient, the stable operation of Combined air preheater.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of arc deflector.
In figure: 1, high temperature section fan housing; 2, adpting flange; 3, Antileaking plate; 4, low-temperature zone fan housing; 5, flow guiding inclined plate; 6, arc deflector; 7, the flange be connected with preheater; 8, reinforcement.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1, for the cover body that the air duct cross-over configurations of Combined air preheater is made up of high temperature section fan housing 1 and low-temperature zone fan housing 4, the corresponding high temperature section of preheater and the join domain of low-temperature zone arrange Antileaking plate 3 in the middle part of cover body, Antileaking plate 3 and cover body inwall can make air flow to the passage of high temperature section fan housing 1 by low-temperature zone fan housing 4 around being formed, and arrange arc flow-guiding structure in high temperature section fan housing 1.
In the present embodiment, arc flow-guiding structure is made up of some arc deflectors 6 be bent upwards, the two ends of arc deflector 6 are fixed on the inwall of high temperature section fan housing 1 arranged on left and right sides plate, the distribution of arc deflector 6 is as follows: along high temperature section fan housing 1 away from the top margin of preheater to the diagonal plane on base near preheater, arc deflector 6 is evenly arranged.
Air flows in low-temperature zone fan housing 4 after the preheating of preheater low-temperature zone, turn due to air flowing and produce centrifugal force, air is caused to occur that blockage effect appears in diffusion effect and outer wall place at low-temperature zone fan housing 4 outlet inside wall place, namely near low-temperature zone fan housing 4 outside wall surface, air velocity is higher than inwall place air velocity, and the region that fluid is separated after turning can reach more than 1/2 of width.High temperature section fan housing 1 can be divided into some runners and air is led by the some arc deflectors 6 in arc flow-guiding structure, air is made to be partial to the inwall flowing of high temperature section fan housing 1, thus make air be uniformly distributed in the high temperature section air intake of preheater, reduce the de-wall flowing of air and the generation of eddy current, reduce fluid resistance loss.
Tested by field experiment, in the air duct cross-over configurations of adding arc flow-guiding structure, gas unevenness M
fbe down to 1.2 from 2.6, resistance drop reduces about 200Pa; Under the gas uniform degree meeting heat transfer requirements, by arc flow-guiding structure, the width of air duct cross-over configurations can be made to compare tradition passage reduction transboundary 20%.
In the present embodiment, arc deflector 6 is formed (as shown in Figure 2) along short side direction is bending by straight plate, the two ends on the long limit of straight plate are welded on the inwall of high temperature section fan housing 1 arranged on left and right sides plate respectively, after bending, the radius R of the arc that minor face is formed is 200mm ~ 500mm, and the central angle alpha of this arc is 60 ° ~ 90 °; The quantity of arc deflector 6 is 10 ~ 20.Low-temperature zone fan housing 4 arranges flow guiding inclined plate 5, and flow guiding inclined plate 5 is by downward-sloping away from preheater one laterally closer preheater side.Low-temperature zone fan housing 4 bottom flows into the air of high temperature section fan housing 1 under the water conservancy diversion of flow guiding inclined plate 5, upwards flows in the wall area along low-temperature zone fan housing 4, avoids occurring that air impacts the Biased flow phenomenon that crushing that high temperature section fan housing 1 causes is excessive and produce.Preferably 30 ° ~ 60 °, the angle of inclination of flow guiding inclined plate 5.
Except above-mentioned points, in order to strengthen the stability of cover body, the outer wall of cover body is installed reinforcement 8; For the ease of cover body is connected with preheater, the flange 7 (arrange the flange be connected with preheater high temperature section in high temperature section fan housing 1 outer rim, arrange the flange be connected with preheater low-temperature zone in low-temperature zone fan housing 4 outer rim) be connected with preheater is set in the position that cover body outer rim contacts with preheater; High temperature section fan housing 1 and the low-temperature zone fan housing 4 of cover body can adopt one to be connected, and adopt Split type structure, connected between high temperature section fan housing 1 and low-temperature zone fan housing 4 by adpting flange 2 in the present embodiment.
Claims (10)
1. the air duct cross-over configurations for Combined air preheater, it is characterized in that: the cover body be made up of high temperature section fan housing (1) and low-temperature zone fan housing (4), the corresponding high temperature section of preheater and the join domain of low-temperature zone arrange Antileaking plate (3) in the middle part of cover body, Antileaking plate (3) and cover body inwall can make air flow to the passage of high temperature section fan housing (1) by low-temperature zone fan housing (4) around being formed, and high temperature section fan housing arranges arc flow-guiding structure in (1).
2. the air duct cross-over configurations for Combined air preheater according to claim 1, it is characterized in that: described arc flow-guiding structure is made up of some arc deflectors (6) be bent upwards, and the two ends of arc deflector (6) are fixed on the inwall of high temperature section fan housing (1) arranged on left and right sides plate.
3. the air duct cross-over configurations for Combined air preheater according to claim 2, it is characterized in that: along high temperature section fan housing (1) away from the top margin of preheater to the diagonal plane on base near preheater, arc deflector (6) is evenly arranged.
4. the air duct cross-over configurations for Combined air preheater according to Claims 2 or 3, it is characterized in that: described arc deflector (6) is formed along short side direction is bending by straight plate, after bending, the radius of the arc that minor face is formed is 200mm ~ 500mm, and the central angle of this arc is 60 ° ~ 90 °.
5. the air duct cross-over configurations for Combined air preheater according to Claims 2 or 3, is characterized in that: the quantity of described arc deflector (6) is 10 ~ 20.
6. the air duct cross-over configurations for Combined air preheater according to claim 1,2 or 3, it is characterized in that: described low-temperature zone fan housing (4) arranges flow guiding inclined plate (5), flow guiding inclined plate (5) is by downward-sloping away from preheater one laterally closer preheater side.
7. the air duct cross-over configurations for Combined air preheater according to claim 6, is characterized in that: the angle of inclination of described flow guiding inclined plate (5) is 30 ° ~ 60 °.
8. the air duct cross-over configurations for Combined air preheater according to claim 1,2 or 3, is characterized in that: reinforcement (8) is installed in described cover body outside.
9. the air duct cross-over configurations for Combined air preheater according to claim 1,2 or 3, is characterized in that: the position that described cover body outer rim contacts with preheater arranges the flange (7) be connected with preheater.
10. the air duct cross-over configurations for Combined air preheater according to claim 1,2 or 3, it is characterized in that: in described cover body, connected by adpting flange (2) between high temperature section fan housing (1) and low-temperature zone fan housing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460261.1U CN204987070U (en) | 2015-06-30 | 2015-06-30 | A air duct cross -over connection structure for making up formula air heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460261.1U CN204987070U (en) | 2015-06-30 | 2015-06-30 | A air duct cross -over connection structure for making up formula air heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204987070U true CN204987070U (en) | 2016-01-20 |
Family
ID=55121437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520460261.1U Withdrawn - After Issue CN204987070U (en) | 2015-06-30 | 2015-06-30 | A air duct cross -over connection structure for making up formula air heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204987070U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913332A (en) * | 2015-06-30 | 2015-09-16 | 山东旺泰科技有限公司 | Bridging structure of air channel used for combined air preheater |
-
2015
- 2015-06-30 CN CN201520460261.1U patent/CN204987070U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913332A (en) * | 2015-06-30 | 2015-09-16 | 山东旺泰科技有限公司 | Bridging structure of air channel used for combined air preheater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160120 Effective date of abandoning: 20170926 |