CN201715541U - Air-leakage guiding control system of Junker type air preheater - Google Patents
Air-leakage guiding control system of Junker type air preheater Download PDFInfo
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- CN201715541U CN201715541U CN2010201165653U CN201020116565U CN201715541U CN 201715541 U CN201715541 U CN 201715541U CN 2010201165653 U CN2010201165653 U CN 2010201165653U CN 201020116565 U CN201020116565 U CN 201020116565U CN 201715541 U CN201715541 U CN 201715541U
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- air
- dredging
- fanning strip
- seam
- sealing plate
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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 relates to an air-leakage guiding control system of a Junker type air preheater. The air-leakage guiding control system comprises a mechanical sealing device, an air leakage guiding device and an automatic control device, and is characterized in that hot junction and cold junction sector plates are split with an axial sealing plate, positions of the hot junction and cold junction sector plates can be adjusted, width of the sector plates can completely cover three rotor sector bins with width of 10 degrees or 7.5 degrees, one or more radially arranged guiding slits and auxiliary guide holes are respectively arranged on the inner sides of the hot junction sector plate and the cold junction sector plate, one or more transversely arranged guiding slits and auxiliary guide holes are arranged on the inner side of the axial sealing plate, box type beams capable of hermetically covering the guiding slits and the auxiliary guide holes are respectively arranged on the hot junction sector plate, the cold junction sector plate and the axial sealing plate, and all the guiding slits and the auxiliary holes are arranged at positions on the hot junction sector plate, the cold junction sector plate and the axial sealing plate from a smoke side to an air inlet side in an angle ranging from 2 degrees to 28 degrees. The air-leakage guiding control system is suitable for air-leakage control for air preheaters of large-sized boilers, has perfect structure and fine control effect of leaked air recycling and saves energy resources.
Description
Technical field
The utility model belongs to a kind of auxiliary equipment of boiler, is the sealing new equipment that air leaks that prevents on a kind of air preheater that can be used for big-and-middle-sized boiler of power plant.
Background technology
Air preheater is that air preheater is the afterbody heat transmission equipment that extensively adopts on the big-and-middle-sized boiler of power plant, and its main effect is to reclaim heat, regulates exhaust gas temperature, improves boiler efficiency, thereby reaches fuel-saving purpose.Junker formula air preheater is the air preheater that is widely used at present, but the air leak rate of air curtain height insoluble problem that is Ljungstrom air heater.So in Junker formula air preheater technology, prevent or reduce the Sealing Technology of leaking out and occupy very consequence.At present air preheater adopt mechanical sealing system mostly, from the sealing control technology of motion tracking rotor deformation etc., all can not thoroughly solve the Junker formula air preheater problem of leaking out.At present, widely used Ljungstrom air heater, also have and adopt the leak out mode of control of the formula of dredging to solve the problem that system leaks out, but this mode remains in some shortcomings: 1, at first be to adopt the ease-hole structure to dredge, on the one hand reduce the zone of leaking out and being dredged because of the tiny meeting in aperture, because ease-hole stops up easily, make the negative pressure suction force weaken greatly simultaneously, reduced the effect that negative pressure is dredged; 2, the negative pressure cavity that is arranged in fanning strip is the entire body hollow structure, cause the chamber inner outlet inhomogeneous with negative pressure near, far-end, even weaken to 0 in the regional area negative pressure, not only effect is dredged in influence, and cavity volume is excessive, makes to ensureing that negative pressure value causes dredging the blower fan power consumption and increases; 3, two of the boiler setting air preheaters delivery apparatus that leaks out separately all has and independently dredges blower fan separately, if wherein a typhoon machine breaks down, then this delivery apparatus can't move; 4, the boiler at low load operation minimizing of the time leaking out can't not closed wherein one when not needing two to dredge blower fan and move simultaneously yet; 5, control system is provided with test and control assemblies such as oxygen amount, temperature, pressure, and complex structure is easy to generate fault.Therefore, need improve.
The utility model content
The purpose of this utility model is in order to solve the problems of the technologies described above, to propose a kind of formula of dredging leak control system of Ljungstrom air heater, and this apparatus structure is comparatively perfect, leaks out that it is effective to dredge, control flexibly, good energy-conserving effect.
The purpose of this utility model solves by the following technical programs: the formula of the dredging leak control system of Ljungstrom air heater comprises mechanically-sealing apparatus, the delivery apparatus that leaks out, automaton; The leak control system that is made of described mechanically-sealing apparatus, the delivery apparatus that leaks out, automaton is separately positioned in two air preheaters of every boiler plant; Described mechanically-sealing apparatus comprises: a wind of air preheater, secondary wind side are the hot junction fanning strip that is provided with in the middle of air side and the fume side, cold junction fanning strip, axial sealing plate and fixed or slidingtype static seal, central tube seal, cool and heat ends bypass seal spare and are fixed on apex seal, axial seal sheet on the rotor dividing plate; Hot junction, cold junction fanning strip, axial sealing plate are fixed on air preheater cool and heat ends center truss and the rotor case by adjustable link and sealing plate; The delivery apparatus that leaks out is provided with: dredge seam, pipeline, header, dredge blower fan; It is characterized in that: leave the preset clearance of adjusting according to the hot shaping of rotor between hot junction, cold junction fanning strip and the axial sealing plate, hot junction, cold junction fanning strip and axial sealing plate are split type, and its position is adjustable, and its width can cover three groups of width simultaneously when static state be that the rotor of 10 ° or 7.5 ° is separated fan-shaped storehouse; In the hot junction, cold junction fanning strip inboard be respectively equipped with one or several arranged radially dredge the seam and auxiliary ease-hole, the axial sealing plate inboard is provided with one or several transversely arranged seam and auxiliary ease-hole dredged, and dredges seam and the auxiliary ease-hole position between from fume side to air side 2 °～28 ° that with the air preheater center are benchmark hot junction, cold junction fanning strip and axial sealing plate.
The utility model further improves and the additional project of enforcement is:
In the described mechanically-sealing apparatus, dredging seam and assisting ease-hole to be provided with sealing on hot junction, cold junction fanning strip and the axial sealing plate covers the box-girder that this is dredged seam and assists ease-hole, and this box-girder be divided into one or several independent dredge the chamber, each dredges pipeline, the header of chamber by independently dredging pipe and the gas leakage of air preheater peripheral hardware and dredge, dredge blower fan is connected.
In the described mechanically-sealing apparatus, can also the inlet side promptly contain side of wind, secondary wind and the hot junction fanning strip between the fume side and only cold junction fanning strip and the axial sealing plate between wind and the fume side be provided with box-girder, this box-girder sealing covers described seam and the auxiliary ease-hole dredged, and each box-girder is divided into one or several and independently dredges the chamber, respectively dredges pipeline, the header of chamber by independently dredging pipe and the gas leakage of air preheater peripheral hardware separately and dredge, dredges blower fan and be connected.
The upper and lower horizontal end face of upright side of the wide end of described hot junction, cold junction fanning strip and axial sealing plate also is provided with dredges seam.
The sealing surface of described fanning strip is that the set-up mode of dredging seam of medial surface is: one or several radially is interrupted slit, dredging the seam width is increased progressively to wide extreme direction gradually by the narrow end of fanning strip, the seam of dredging of described axial sealing plate medial surface is the wide slit of interruption, and auxiliary ease-hole is arranged in the one or both sides of dredging seam.
The hot junction fanning strip of the product of a described wind, secondary wind side and fume side and only the sealing surface of the cold junction fanning strip between wind and the fume side be that the set-up mode of dredging seam of medial surface is: one or several radially is interrupted slit, dredging the seam width is increased progressively to wide extreme direction gradually by the narrow end of fanning strip, axial sealing plate is for being interrupted wide slit, and auxiliary ease-hole is arranged in one or both sides.
In described automaton, be provided with and be installed in the pressure transmitter of dredging header and be installed in the pressure transmitter of dredging on the fan outlet tube road.
Described two on two air preheaters cover of being arranged on is dredged the header of dredging of formula leak control system and is interconnected by pipeline, air door.
Dredge the fan outlet tube road and be connected to the outlet of boiler fan, primary air fan, the female pipe of hot secondary wind.
The operation principle of leak control system of the present utility model: when air preheater equipment normally moves, sealed of air with malleation stops, small leak is by formed negative pressure cavity in the box-girder of fanning strip and axial sealing plate, suck pipeline separately by dredging seam and auxiliary ease-hole, under the effect of dredging blower fan, directly be directed to the pressure fan exit, or it is combustion-supporting to be introduced in the interior participation of hot secondary air duct burner hearth; Perhaps enter pressure fan, primary air fan inlet or exit and enter circulation, play the effect that improves initial wind-warm syndrome, effectively reduce the cold end corrosion of air preheater, improve the thermal efficiency of boiler.
Automaton is exactly by to the detection into and out of flue gas pressures, handles through control logic, adjusts the wind-force of dredging blower fan automatically, dredges internal circulating load thereby automatically adjust, and makes it reach resonable degree.
Economic benefit: not only can guarantee the reduction of air-heater leakage rate, thereby reduction heat loss due to exhaust gas, improve boiler efficiency, strengthen boiler safety and economical operation, and be that the hot blast of " being dredged " utilizes, fume side reduces mixing that this strand leak out simultaneously, the corresponding decline of exhaust gas volumn, flue negative pressure is still replenished, thereby the also corresponding reduction with power consumption of the load of air-introduced machine, has improved overall economic efficiency.
Advantage of the present utility model:
1. adopt and dredge crack structure, enlarged in the zone with homalographic and dredged the zone of action, that is evenly dredged leaks out, and is difficult for producing stopping up, and makes the negative pressure of system all can act on to dredge the zone and can not produce the loss of negative pressure energy.
2. adopt dredging the chamber and independently dredging pipe separately of box girder structure, negative pressure is divided into a plurality of vacuum chamber, not only play the effect of consolidating the fanning strip gusset, avoid fanning strip distortion to occur, more can be so that whole negative pressure cavity pressure is even, reasonable, the zone that does not exist negative pressure to weaken, dredge effective, and vacuum chamber's volume reduces, and the negative pressure suction force that blower fan produces can be acted directly on to dredge in the zone, thereby power consumption will greatly reduce.
3. the mode of employing pressure transmitter is carried out FEEDBACK CONTROL, and is simple in structure, reliable, avoids the complexity of system
4. the header of dredging of the cover of two on the boiler being dredged the formula leak control system is interconnected by pipeline, air door, control by valve, go here and there and formula is combined into two and dredges in the blower fan, break down as a typhoon machine wherein, can also driving down by an other typhoon machine, two cover systems work on; Perhaps under the little situation of boiler at low load operation air leak rate of air curtain, only dredge blower fan work, just can realize dredging control promptly having reached effect, reduced power consumption again by one.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described further: embodiment: referring to accompanying drawing, the formula of the dredging leak control system of Ljungstrom air heater comprises mechanically-sealing apparatus, the delivery apparatus that leaks out, automaton; The leak control system that is made of described mechanically-sealing apparatus, the delivery apparatus that leaks out, automaton is separately positioned in two air preheaters of each boiler plant; Described mechanically-sealing apparatus comprises: wind, a secondary wind side are the hot junction fanning strip 1 that is provided with in the middle of air side and the fume side, cold junction fanning strip 2, axial sealing plate 3 and fixed or slidingtype static seal, central tube seal, cool and heat ends bypass seal spare and are fixed on apex seal, axial seal sheet on the rotor dividing plate; Hot junction, cold junction fanning strip and axial sealing plate carry out the preset clearance setting according to the hot shaping of rotor; Hot junction, cold junction fanning strip, axial sealing plate are fixed on air preheater cool and heat ends center truss and the rotor case by adjustable link and sealing plate; The delivery apparatus that leaks out is provided with: dredge seam, pipeline, header, dredge blower fan; Hot junction, cold junction fanning strip and axial sealing plate are split type, and its position is adjustable, and its width can cover the fan-shaped storehouse that three width are 10 ° rotor simultaneously when static state; In the hot junction, cold junction fanning strip inboard be respectively equipped with an arranged radially dredge seam 1.1 and auxiliary ease-hole 1.2, the axial sealing plate inboard is provided with a transversely arranged seam 3.1 and an auxiliary ease-hole 3.2 dredged, and dredges 15 ° the position from fume side to the air inlet side that seam and auxiliary ease-hole are positioned at hot junction, cold junction fanning strip and axial sealing plate.In the described mechanically-sealing apparatus, dredging seam and assisting ease-hole to be provided with sealing on hot junction, cold junction fanning strip and the axial sealing plate covers the box-girder 2.3,3.3 that this is dredged seam and assists ease-hole, and this box-girder is divided into 6 independent chambers 2.2 of dredging, and each dredges pipeline, the header of chamber by independently dredging pipe 2.4 and the gas leakage of air preheater peripheral hardware and dredge, dredge blower fan is connected.The upper and lower horizontal end face of upright side of the wide end of described hot junction, cold junction fanning strip and axial sealing plate also is provided with dredges seam 2.5,3.5.The sealing surface of described fanning strip is that the set-up mode of dredging seam of medial surface is: 1 radially is interrupted slit, dredging the seam width is increased progressively to wide extreme direction gradually by the narrow end of fanning strip, the seam of dredging of described axial sealing plate medial surface is the wide slit of interruption, and auxiliary ease-hole is arranged in a side of dredging seam.In described automaton, be provided with and be installed in the pressure transmitter of dredging header and be installed in the pressure transmitter of dredging on the fan outlet tube road.Described two on two air preheaters cover of being arranged on is dredged the header of dredging of formula leak control system and is interconnected by pipeline, air door.Dredge the outlet that the fan outlet tube road is connected to boiler fan.
The utility model is through on probation, and effect is very good.
Claims (9)
1. the formula of the dredging leak control system of a Ljungstrom air heater comprises mechanically-sealing apparatus, the delivery apparatus that leaks out, automaton; The leak control system that is made of described mechanically-sealing apparatus, the delivery apparatus that leaks out, automaton is separately positioned in two air preheaters of every boiler plant; Described mechanically-sealing apparatus comprises: a wind of air preheater, secondary wind side are the hot junction fanning strip (1) that is provided with in the middle of air side and the fume side, cold junction fanning strip (2), axial sealing plate (3) and fixed or slidingtype static seal, central tube seal, cool and heat ends bypass seal spare and are fixed on apex seal, axial seal sheet on the rotor dividing plate; Hot junction, cold junction fanning strip, axial sealing plate are fixed on air preheater cool and heat ends center truss and the rotor case by adjustable link and sealing plate; The delivery apparatus that leaks out is provided with: dredge seam, pipeline, header, dredge blower fan; It is characterized in that: leave the preset clearance of adjusting according to the hot shaping of rotor between hot junction, cold junction fanning strip and the axial sealing plate, hot junction, cold junction fanning strip and axial sealing plate are that split is adjustable, and its position is adjustable, and its width can cover three groups of width simultaneously when static state be that the rotor of 10 ° or 7.5 ° is separated fan-shaped storehouse; In the hot junction, cold junction fanning strip inboard be respectively equipped with one or several arranged radially dredge seam (1.1) and auxiliary ease-hole (1.2), the axial sealing plate inboard is provided with one or several transversely arranged seam (3.1) and auxiliary ease-hole (3.2) dredged, dredging seam and auxiliary ease-hole, to be positioned at the air preheater center be benchmark, the fan-shaped position between from fume side to air side 2 °～28 ° of hot junction, cold junction fanning strip and axial sealing plate.
2. leak control system according to claim 1, it is characterized in that: in the described mechanically-sealing apparatus, dredging seam and assisting ease-hole to be provided with sealing on hot junction, cold junction fanning strip and the axial sealing plate covers the box-girder (2.3,3.3) that this is dredged seam and assists ease-hole, and this box-girder be divided into one or several independent dredge chamber (2.2), each dredges pipeline, the header of chamber by independently dredging pipe (2.4) and the gas leakage of air preheater peripheral hardware and dredge, dredge blower fan is connected.
3. leak control system according to claim 1, it is characterized in that: in the described mechanically-sealing apparatus, the air preheater air side promptly contain a side of wind, secondary wind and the hot junction fanning strip between the fume side and only cold junction fanning strip and the axial sealing plate between wind and the fume side be provided with box-girder, described seam and the auxiliary ease-hole dredged of this box-girder sealing, and each box-girder is divided into one or several and independently dredges the chamber, respectively dredges pipeline, the header of chamber by independently dredging pipe and the gas leakage of air preheater peripheral hardware separately and dredge, dredges blower fan and be connected.
4. according to claim 1,2, one of 3 described leak control systems, it is characterized in that: the upper and lower horizontal end face of upright side of the wide end of described hot junction, cold junction fanning strip and axial sealing plate also is provided with dredges seam (2.5,3.5).
5. according to claim 1,2, one of 3 described leak control systems, it is characterized in that: the sealing surface of described fanning strip is that the set-up mode of dredging seam of medial surface is: one or several radially is interrupted slit, dredging the seam width is increased progressively to wide extreme direction gradually by the narrow end of fanning strip, the seam of dredging of described axial sealing plate medial surface is the wide slit of interruption, and auxiliary ease-hole is arranged in the one or both sides of dredging seam.
6. leak control system according to claim 5, it is characterized in that: the hot junction fanning strip between a described wind, secondary wind side and the fume side and only the sealing surface of the cold junction fanning strip between wind and the fume side be that the set-up mode of dredging seam of medial surface is: one or several radially is interrupted slit, dredging the seam width is increased progressively to wide extreme direction gradually by the narrow end of fanning strip, axial sealing plate is for being interrupted wide slit, and auxiliary ease-hole is arranged in one or both sides.
7. leak control system according to claim 6 is characterized in that: be provided with in described automaton and be installed in the pressure transmitter of dredging header and be installed in the pressure transmitter of dredging on the fan outlet tube road.
8. leak control system according to claim 6 is characterized in that: described two on two air preheaters cover of being arranged on is dredged the header of dredging of formula leak control system and is interconnected by pipeline, air door.
9. leak control system according to claim 6 is characterized in that: dredge the fan outlet tube road and be connected to the gateway of boiler fan, primary air fan, the female pipe of hot secondary wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201165653U CN201715541U (en) | 2010-02-23 | 2010-02-23 | Air-leakage guiding control system of Junker type air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201165653U CN201715541U (en) | 2010-02-23 | 2010-02-23 | Air-leakage guiding control system of Junker type air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201715541U true CN201715541U (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201165653U Expired - Fee Related CN201715541U (en) | 2010-02-23 | 2010-02-23 | Air-leakage guiding control system of Junker type air preheater |
Country Status (1)
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| CN (1) | CN201715541U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095206A (en) * | 2011-02-14 | 2011-06-15 | 燕守志 | Sealed recovery system for rotary air preheater |
| CN108019771A (en) * | 2017-10-13 | 2018-05-11 | 南京博沃科技发展有限公司 | It is a kind of that the air preheater directly to leak out is reduced using rotor rolling action |
-
2010
- 2010-02-23 CN CN2010201165653U patent/CN201715541U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095206A (en) * | 2011-02-14 | 2011-06-15 | 燕守志 | Sealed recovery system for rotary air preheater |
| CN102095206B (en) * | 2011-02-14 | 2012-02-29 | 燕守志 | Sealed recovery system for rotary air preheater |
| CN108019771A (en) * | 2017-10-13 | 2018-05-11 | 南京博沃科技发展有限公司 | It is a kind of that the air preheater directly to leak out is reduced using rotor rolling action |
| CN108019771B (en) * | 2017-10-13 | 2019-06-07 | 南京博沃科技发展有限公司 | It is a kind of to reduce the air preheater directly to leak out using rotor rolling action |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Hayi Energy-Saving Environmental Protection Technology Development Co., Ltd. Assignor: Sun Haibo Contract record no.: 2012110000003 Denomination of utility model: Air-leakage guiding control system of Junker type air preheater Granted publication date: 20110119 License type: Exclusive License Record date: 20120113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20190223 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |