CN204201933U - Modified trisector air heater - Google Patents
Modified trisector air heater Download PDFInfo
- Publication number
- CN204201933U CN204201933U CN201420633255.7U CN201420633255U CN204201933U CN 204201933 U CN204201933 U CN 204201933U CN 201420633255 U CN201420633255 U CN 201420633255U CN 204201933 U CN204201933 U CN 204201933U
- Authority
- CN
- China
- Prior art keywords
- fanning strip
- district
- air
- bar hole
- wide
- Prior art date
- 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- Withdrawn - After Issue
Links
Classifications
-
- 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
Landscapes
- Air Supply (AREA)
Abstract
The utility model discloses a kind of modified trisector air heater, comprise the rotor around central axis, rotor comprises the fan-shaped storehouse, some bases that the some radial dividing plate that is fixedly connected with central shaft is separated into.Be provided with bellows above two pieces of upper end fanning strips and wide fanning strip and separate plate; Be provided with bellows below two pieces of lower end fanning strips and the wide fanning strip of bar hole and separate plate.The fan-shaped storehouse runner of rotor is divided into flue gas district, First air district and Secondary Air district; Wide fanning strip and the wide fanning strip of bar hole is provided with between flue gas district and First air district; All fanning strip is provided with between flue gas district and Secondary Air district, between Secondary Air district and First air district.The wide fanning strip of bar hole is provided with bar hole; Bar hole is connected with cold junction secondary air box by cold junction Secondary Air seal channel.Such design makes the utility model be issued to the sealing effectiveness in four points of storehouses in cost and the close condition of trisector air heater.
Description
Technical field
The utility model relates to thermal power generation, a kind of modified trisector air heater of concrete finger.
Background technology
Rotary regenerative air preheater is the important auxiliary equipment in thermal power plant, it is the heat-exchange apparatus utilizing the waste heat of flue gas to carry out heating boiler burning required air, owing to there is dynamic and static gaps in rotary regenerative air preheater, therefore Air Leakage is inevitably had to exist, comprise carry leak out, radial direction is leaked out, axis is leaked out and bypass is leaked out, wherein, radial direction is leaked out is mainly leaking out of air preheater.The Air Leakage of air preheater causes power plant's primary air fan and air-introduced machine cigarette air capacity to increase, and power consumption increases, and power plant efficiency declines.
Traditional air preheater adopts three points of storehouse forms mostly, is divided into flue gas district, First air district and region, three, Secondary Air district, and because primary air pressure is higher, the inleakage of First air side direction fume side is large, and the share of duty air preheater inleakage is the highest.In the past, the air leak rate of air curtain of air preheater reaches as high as more than 20%.Control the radial direction mode of leaking out and can adopt clearance control system, this is the leak control system that 600MW ~ more than 1000MW large sized unit extensively adopts, and follows the tracks of the gap between fanning strip and rotor by sensing element, and the height of adjustment fanning strip is to control to leak out.Because needs sensor and executing agency coordinate, there is the problem that reliability is low.
In the version of apex seal, there are three sealings, four sealings, flexible sealing, brush seal etc., controlled leak out gap thus reduce inleakage by the quantity of various types of diaphragm seal form, increase sealing.Three points of storehouse air preheaters of the large sized unit after improving, leak out and can accomplish at present to be less than 5% in 1 year, be less than the level of 6% after 1 year.Especially in recent years the seal style such as various flexible sealing, brush seal occurs, but changes non-contacting seal into contact seal due to these seals style, initial operating stage effect still can, but the later sealing effectiveness that weares and teares still can decline.
For the radial direction reducing air preheater is leaked out, in the version of air preheater, utility model four points of storehouse air preheater versions in industry, First air district is arranged between 2 Secondary Air districts, to reduce the inleakage of high-head First air district to flue gas district, leak out and can accomplish at present to be less than 4% in 1 year, after 1 year, be less than the level of 5%.But also there is the problems such as complex structure, flue gas resistance is large, pipe arrangement is difficult.
Also has recovery type sealing means, by the negative pressure of pressure fan (primary air fan) entrance, or separately establish air exhauster, form negative pressuren zone in radial seal gap, will leak out to pump out and deliver to secondary air duct or the recovery of pressure fan (primary air fan) inlet conduits.But this mode is apparent air leak rate of air curtain to decline, and in fact radial leaking out also is greater than traditional sealing means, there is the problems such as pipe-line system complexity, power consumption are large, blower fan wearing and tearing, control.
Utility model content
The purpose of this utility model is to provide a kind of air leak rate of air curtain, blower fan power consumption with cost all than four points of modified trisector air heaters that storehouse rotary regenerative air preheater is low, air leak rate of air curtain is lower than conventional type trisector air heater with blower fan power consumption.
The utility model realizes by following technical scheme:
A kind of modified trisector air heater, comprise the rotor around central axis, described rotor comprises the fan-shaped storehouse, some bases that the some radial dividing plate that is fixedly connected with described central shaft is separated into, and in the diametric upper end of described rotor, lower end is furnished with totally four pieces of fanning strips symmetrically; Wide fanning strip is also provided with in the diametric(al) upper end of described rotor; Also have and the wide fanning strip of the symmetrically arranged bar hole of described wide fanning strip in the diametric(al) lower end of described rotor.
Be provided with bellows above fanning strip described in two pieces of upper ends and described wide fanning strip and separate plate; Be provided with bellows below fanning strip described in two pieces of lower ends and the wide fanning strip of described bar hole and separate plate.
The fan-shaped storehouse runner of described rotor is divided into flue gas district, First air district and Secondary Air district; Described wide fanning strip and the wide fanning strip of described bar hole is provided with between described flue gas district and described First air district; All fanning strip is provided with between described flue gas district and described Secondary Air district, between described Secondary Air district and described First air district.
The wide fanning strip of described bar hole is provided with bar hole; Described bar hole is connected with cold junction secondary air box by cold junction Secondary Air seal channel; Described radial separator edge is provided with brush seal installation.
Further, described fanning strip width is greater than fan-shaped storehouse, three bases, and is less than fan-shaped storehouse, four bases; Described wide fanning strip and described bar hole wide fanning strip width are greater than fan-shaped storehouse, six bases, and are less than fan-shaped storehouse, seven bases.
Again further, described bar hole is arranged on the wide fanning strip axis of described bar hole.
Three points of traditional storehouse air preheater radial seals are made up of the sealing between First air district and flue gas district, the sealing between First air district and Secondary Air district and the sealing between Secondary Air district and flue gas district.In figure, Δ P1 is the pressure reduction in First air district and flue gas district, G1 is the inleakage of First air district to flue gas district, Δ P2 is the pressure reduction in Secondary Air district and flue gas district, G2 is the inleakage of Secondary Air district to flue gas district, Δ P12 is the pressure reduction in First air district and Secondary Air district, and G12 is the inleakage of First air district to Secondary Air district.Because primary air pressure is higher, general at about 15 ~ 18kPa, the pressure reduction in sealing two district between First air district and flue gas district is up to more than 20kPa, and therefore First air is to the leading position accounting for and always leak out of leaking out in the flue gas district of negative pressure, is the main cause that air leak rate of air curtain remains high.
And four points of storehouse air preheaters are arranged in First air higher for pressure head in the middle of Secondary Air, First air and flue gas are separated from, adjacent with flue gas district is Secondary Air, and Secondary Air district leaks to the flue gas district of negative pressure, and First air leaks to Secondary Air.Because secondary wind pressure is lower, generally at about 3kPa, therefore four points of storehouse air preheaters can directly leak out about about 20 ~ 25% than three points of storehouse air preheaters minimizings.
The usefulness of the utility model modified three points of storehouse air preheaters is: can form fan-shaped storehouse, a basis close to secondary wind pressure between First air district and flue gas district, from hot end of rotor bleed this basic fan-shaped storehouse heat primary air will part flow to rotor cold junction, mix with the cold First air in this basic fan-shaped storehouse of bleeding from rotor cold junction, mixed First air temperature is larger than cold First air with specific volume, reduce this basic fan-shaped storehouse to bleed from rotor cold junction the primary air flow of fume side, and this basic fan-shaped storehouse is close from the bleed secondary air flow of fume side of hot end of rotor from the bleed primary air flow of fume side and Secondary Air of hot end of rotor, therefore radial seal effect is better than four points of storehouse air preheaters.Further, version and connecting pipe and conventional three points of storehouse air preheaters similar, windage geometric ratio four points of storehouse air preheaters of primary and secondary air are little, and manufacturing cost, blower fan power consumption etc. are also low than four points of storehouse air preheaters.
Accompanying drawing explanation
Fig. 1 is modified trisector air heater schematic top plan view.
Fig. 2 is modified trisector air heater perspective view.
Fig. 3 is modified trisector air heater cross sectional representation.
Fig. 4 is modified trisector air heater longitudinal section and sector plate structure schematic diagram.
In figure: flue gas district 1; First air district 2; Secondary Air district 3; Fanning strip 41; The wide fanning strip 42 of bar hole; Bar hole 421; Wide fanning strip 43; Rotor 5; Radial dividing plate 6; Cold junction Secondary Air seal channel 71; Central shaft 8; Bellows separate plate 9.
Detailed description of the invention
Performance of the present utility model is described in detail below in conjunction with accompanying drawing:
A kind of modified trisector air heater, it comprises the rotor 5 rotated around central shaft 8, rotor comprises the fan-shaped storehouse, some bases that the some radial dividing plate 6 that is fixedly connected with central shaft 8 is separated into, and in the diametric upper end of rotor 5, lower end is furnished with totally four pieces of fanning strips 41 symmetrically; Wide fanning strip 43 is also provided with in the diametric(al) upper end of rotor 5; Also have and the wide fanning strip 42 of the symmetrically arranged bar hole of wide fanning strip 43 in the diametric(al) lower end of rotor 5.
Be provided with bellows above two pieces of upper end fanning strips 41 and wide fanning strip 43 and separate plate 9; Be provided with bellows below two pieces of lower end fanning strips 41 and the wide fanning strip 42 of bar hole and separate plate 9;
The fan-shaped storehouse runner of rotor 5 is divided into flue gas district 1, First air district 2 and Secondary Air district 3; Wide fanning strip 43 and the wide fanning strip 42 of bar hole is provided with between flue gas district 1 and First air district 2; Fanning strip 41 is all provided with between flue gas district 1 and Secondary Air district 3, between Secondary Air district 3 and First air district 2;
The wide fanning strip 42 of bar hole is provided with bar hole 421; Bar hole 421 is connected with cold junction secondary air box by cold junction Secondary Air seal channel 71; Radial dividing plate 6 edge is provided with brush seal installation.
Preferably, fanning strip 41 width is greater than fan-shaped storehouse, three bases, and is less than fan-shaped storehouse, four bases; Wide fanning strip 43 and bar hole wide fanning strip 42 width are greater than fan-shaped storehouse, six bases, and are less than fan-shaped storehouse, seven bases.In the rotation process of rotor 5, wide fanning strip 43 and the wide fanning strip of bar hole 42 always at least can realize the sealing in fan-shaped storehouse, five bases like this, reach comparatively good sealing effectiveness.
Preferably, bar hole 421 is arranged on bar hole wide fanning strip 42 axis.
The comparison of putting leak out effect and budget of multiple air preheater:
Air leak rate of air curtain:
Budget is compared:
Below do not elaborate and be prior art.
Claims (3)
1. a modified trisector air heater, it is characterized in that: it comprises the rotor (5) rotated around central shaft (8), described rotor comprises the fan-shaped storehouse, some bases that the some radial dividing plate (6) that is fixedly connected with described central shaft (8) is separated into, and in the diametric upper end of described rotor (5), lower end is furnished with totally four pieces of fanning strips (41) symmetrically; Wide fanning strip (43) is also provided with in the diametric(al) upper end of described rotor (5); Also have and the wide fanning strip of the symmetrically arranged bar hole of described wide fanning strip (43) (42) in the diametric(al) lower end of described rotor (5);
Fanning strip (41) described in two pieces of upper ends and described wide fanning strip (43) top are provided with bellows and separate plate (9); Fanning strip (41) described in two pieces of lower ends and the wide fanning strip of described bar hole (42) below are provided with bellows and separate plate (9);
The fan-shaped storehouse runner of described rotor (5) is divided into flue gas district (1), First air district (2) and Secondary Air district (3); Described wide fanning strip (43) and the wide fanning strip of described bar hole (42) is provided with between described flue gas district (1) and described First air district (2); Between described flue gas district (1) and described Secondary Air district (3), between described Secondary Air district (3) and described First air district (2), be all provided with fanning strip (41);
The wide fanning strip of described bar hole (42) is provided with bar hole (421); Described bar hole (421) is connected with cold junction secondary air box by cold junction Secondary Air seal channel (71); Described radial dividing plate (6) edge is provided with brush seal installation.
2. modified trisector air heater according to claim 1, is characterized in that:
Described fanning strip (41) width is greater than fan-shaped storehouse, three bases, and is less than fan-shaped storehouse, four bases; Described wide fanning strip (43) and the wide fanning strip of described bar hole (42) width are greater than fan-shaped storehouse, six bases, and are less than fan-shaped storehouse, seven bases.
3. modified trisector air heater according to claim 1, is characterized in that:
Described bar hole (421) is arranged on the wide fanning strip of described bar hole (42) axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420633255.7U CN204201933U (en) | 2014-10-28 | 2014-10-28 | Modified trisector air heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420633255.7U CN204201933U (en) | 2014-10-28 | 2014-10-28 | Modified trisector air heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204201933U true CN204201933U (en) | 2015-03-11 |
Family
ID=52659889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420633255.7U Withdrawn - After Issue CN204201933U (en) | 2014-10-28 | 2014-10-28 | Modified trisector air heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204201933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279577A (en) * | 2014-10-28 | 2015-01-14 | 中国电力工程顾问集团中南电力设计院 | Improved type three-secondary-cabin rotary type air preheater |
-
2014
- 2014-10-28 CN CN201420633255.7U patent/CN204201933U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279577A (en) * | 2014-10-28 | 2015-01-14 | 中国电力工程顾问集团中南电力设计院 | Improved type three-secondary-cabin rotary type air preheater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104279577B (en) | Modified trisector air heater | |
| CN204923058U (en) | Variation type quartering storehouse rotation air preheater | |
| CN101080606B (en) | A rotary heat exchanger and a method of reducing leakage in a rotary heat exchanger | |
| CN105972632A (en) | System and process for protecting air preheater of coal-fired power plant from blockage and corrosion through hot-air counterflow | |
| CN201731508U (en) | Air sealing device for reducing air leakage of rotary type air preheater | |
| CN204201933U (en) | Modified trisector air heater | |
| CN107559876A (en) | The reduction of rotary regenerative air preheater is leaked out anti-blocking ash system and method | |
| CN201425316Y (en) | Contact type sealing structure applied to rotary air pre-heater | |
| CN201909334U (en) | Asymmetric quarter-sector rotary air preheater | |
| CN105180203B (en) | Rotary air preheater radial sealing system based on curtain type self-regulating sector plates | |
| CN202253724U (en) | Wind sealing equipment for rotary type air preheater | |
| CN201387026Y (en) | Low-leakage extraction compensation device | |
| CN107869730A (en) | Rotary regenerative air preheater | |
| CN205299554U (en) | Boiler air heater is from purge system | |
| CN201706524U (en) | Sealing device for preventing air preheater from air leakage | |
| CN201680400U (en) | Simple and practical drainage recycling device | |
| CN204829997U (en) | Multichannel regenerative air preheater | |
| CN204648289U (en) | Separate air pre-heating system | |
| CN203052703U (en) | Sealing device of rotary air preheater | |
| CN208635139U (en) | A kind of pressure compensation regenerative air heater anti-air leakage structure and air preheater | |
| CN202757143U (en) | Air pre-heater air leakage and fuel gas recirculation device | |
| CN103032884A (en) | Sealing device of rotary air pre-heater | |
| CN201992680U (en) | Dredge type air leakage control device with sealing brushes for Junker type air preheater | |
| CN206755230U (en) | A kind of sealing device of rotary regenerative air preheater | |
| CN108019771B (en) | It is a kind of to reduce the air preheater directly to leak out using rotor rolling action |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ASS | Succession or assignment of patent right |
Owner name: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTI Free format text: FORMER OWNER: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING GROUP COR Effective date: 20150209 |
|
| C14 | Grant of patent or utility model | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150209 Address after: 430071 Wuchang District, Hubei, South Central Road No. two, No. 12, No. Patentee after: Co., Ltd of Central Southern China Electric Power Design Institute, China Power Engineering Consulting Group Corporation Address before: 430071 Zhongnan Power Design Institute, 668 Democratic Road, Wuchang District, Hubei, Wuhan Patentee before: Central Southern China Electric Power Design Institute, China Power Engineering Consulting Group Cor |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150311 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |