CN201992680U - Dredge type air leakage control device with sealing brushes for Junker type air preheater - Google Patents
Dredge type air leakage control device with sealing brushes for Junker type air preheater Download PDFInfo
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- CN201992680U CN201992680U CN2011200428158U CN201120042815U CN201992680U CN 201992680 U CN201992680 U CN 201992680U CN 2011200428158 U CN2011200428158 U CN 2011200428158U CN 201120042815 U CN201120042815 U CN 201120042815U CN 201992680 U CN201992680 U CN 201992680U
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- sealing
- fanning strip
- seam
- dredge
- dredging
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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 discloses a dredge type air leakage control device with sealing brushes for a Junker type air preheater, which comprises a mechanical sealing device, an air leakage dredging device and an automatic control device, wherein the mechanical sealing device comprises a heat end sector plate, a cold head section plate and an axial sealing plate which are arranged between the primary air side and the secondary air side as well as a radial sealing element and an axial sealing element which are fixed on a rotor separation board. The dredge type air leakage device is characterized in that the radial sealing element and the axial sealing element which are fixed on the rotor separation board are the sealing brushes; brush hairs of the sealing brushes are a group of densely-arrayed metal wires made of materials with high elasticity, high temperature resistance and wear resistance; clearances are respectively reserved between the brush handle parts of the sealing brushes and the upper and lower sector plates as well as between the brush handle parts of the sealing brushes and the inner surface of a side plate and are smaller than the length the brush hairs of the sealing brushes in length; and the brush hairs are propped against the upper and lower sector plates and the inner side lateral surface of the side plate. The dredge type air leakage control device is suitable for the air preheaters of boilers for large and medium-sized power plants for preventing the air from leaking and has the advantages of simple structure, accuracy in control, favorable sealing and dredging effect and electricity economization.
Description
Technical field
The utility model belongs to a kind of auxiliary equipment of boiler, is the new type sealing device 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, reduces exhaust gas temperature, improves boiler efficiency, thereby reaches fuel-saving purpose.Rotary regenerative air heater is the air preheater that is widely used at present, but the air leak rate of air curtain height insoluble problem that is rotary regenerative air heater.So in the rotary regenerative air heater 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 rotary regenerative air heater problem of leaking out.At present, widely used Junker formula air preheater, also there is employing to dredge the formula leak control system and solves the problem of leaking out, but this system remains in some shortcomings: along with temperature raises, mushroom deformation produces, and is fixed in radial and axial diaphragm seal and cold and hot end fanning strip and the axially increasing of the slit between the plate, reduced the effect that negative pressure is dredged, causing dredging the blower fan power consumption increases, and 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, a kind of formula of dredging leak control system that has the Ljungstrom air heater of sealing brush is proposed, this system with the brush seal technology be applied to rotor radially, axial sealing, this system has extremely strong seal clearance compensation ability, can effectively compensate because the mushroom deformation of air preheater etc. cause random seal clearance change, reach gap-free sealed, structure is comparatively perfect, leak out dredge good sealing effect, control flexibly, good energy-conserving effect.
The purpose of this utility model solves by the following technical programs: a kind of formula of dredging leak control system that has the Ljungstrom air heater of sealing brush 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 that is provided with in the middle of inlet 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 radial and axial seal 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 angles are the rotor of 10 ° or 7.5 ° fully when static state; 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 that one or several vertically arranges dredges seam and auxiliary ease-hole, dredges seam and the auxiliary ease-hole position between from fume side to the air inlet side 2 °～28 ° of hot junction, cold junction fanning strip and axial sealing plate; It is characterized in that: the described radial and axial seal that is fixed on the rotor dividing plate is sealing brush, and the bristle of sealing brush is the wire with one group of dense arrangement that high resiliency, material high temperature resistant, rub resistance make; Leave the gap between the brush holder part of sealing brush and upper and lower fanning strip and the side plate inner face, this gap is less than the bristle lengths of sealing brush, and bristle withstands upper and lower fanning strip and side plate inner face.
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 on hot junction, cold junction fanning strip and the axial sealing plate fastens the box-girder that this dredges seam and auxiliary 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, the inlet 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, this box-girder fastens 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, the outer 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, dredge the seam width by fanning strip the inner outward direction increase progressively gradually, 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.
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, dredge the seam width by fanning strip the inner outward direction increase progressively gradually, 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 each pressure transmitter of dredging the chamber 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 or inlet, the outlet of secondary wind, the female pipe of secondary wind.
The operation principle of leak control system of the present utility model: when air preheater equipment normally moves, the sealed brush of air with malleation stops, a spot of remaining leakage air 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 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.
Advantage of the present utility model:
1. the sealing brush that adopts the heat-resistant antifriction wire to form substitutes original radial and axial diaphragm seal, makes it to adapt to more the air preheater distortion, reduces to help dredging effect because the machinery that mechanically deform produces leaks out.
2. adopt and dredge crack structure, in zone, enlarged and dredged the zone of action, reclaim leaking out of being dredged equably, be difficult for producing and stop up, make the negative pressure of system all can act on to dredge the zone and can not produce the loss of negative pressure energy with homalographic.
3. 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 so that whole negative pressure cavity negative pressure becomes evenly, 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.
4. the mode of employing pressure transmitter is carried out FEEDBACK CONTROL, and is simple in structure, reliable, avoids the complexity of system
5. 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 underrun situation, only, just can realize dredging control, promptly reach effect, reduce power consumption again by typhoon machine work.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model;
Fig. 2 is the structural representation of sealing brush of the present utility model;
Fig. 3 is the enlarged drawing of local A in the accompanying drawing 1 of the present utility model;
Fig. 4 is fanning strip of the present utility model and axial sealing plate relative position decomposition texture schematic diagram.
The profile of the utility model product is not subjected to the restriction of this figure, and only the profile change also belongs to protection domain 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 that has the Ljungstrom air heater of sealing brush 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 inlet side and the fume side, cold junction fanning strip 2, axial sealing plate 3 and fixed or slidingtype static seal, central tube seal 4, cool and heat ends bypass seal spare and are fixed on radial and axial seal on the rotor dividing plate 5; 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 6 by adjustable link and sealing plate; The delivery apparatus that leaks out is provided with: dredge seam 7, pipeline 8, 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 9 that three angles are 10 ° rotor fully when static state; In the hot junction, cold junction fanning strip inboard be respectively equipped with that one or several vertically arranges dredge seam 7 and auxiliary ease-hole 71, the axial sealing plate inboard is provided with one or several transversely arranged seam 72 and auxiliary ease-hole 73 dredged, and dredges 20 ° 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; The described radial and axial seal that is fixed on the rotor dividing plate is sealing brush 51,52, and the bristle of sealing brush is the wire with one group of dense arrangement that high resiliency, material high temperature resistant, rub resistance make; Leave the gap between the brush holder part of sealing brush and upper and lower fanning strip and the side plate inner face, this gap is less than the bristle lengths of sealing brush, and bristle withstands upper and lower fanning strip and side plate inner face.In the described mechanically-sealing apparatus, dredging seam and assisting ease-hole to be provided with on hot junction, cold junction fanning strip and the axial sealing plate fastens the box- girder 23,33 that this dredges seam and auxiliary ease-hole, and this box-girder be divided into one or several independent dredge chamber 22, each dredges pipeline, the header of chamber by independently dredging pipe 24 and the gas leakage of air preheater peripheral hardware and dredge, dredge blower fan is connected.In the described mechanically-sealing apparatus, the inlet 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, this box-girder fastens 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, the outer end of described hot junction, cold junction fanning strip and axial sealing plate also is provided with dredges seam 44,34.
It below only is 1 specific embodiment of this patent; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of this patent.
Claims (9)
1. the formula of dredging leak control system that has the Ljungstrom air heater of sealing brush 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 inlet side and the fume side, cold junction fanning strip (2), axial sealing plate (3) and fixed or slidingtype static seal, central tube seal (4), cool and heat ends bypass seal spare and are fixed on radial and axial seal on the rotor dividing plate (5); 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 (6) by adjustable link and sealing plate; The delivery apparatus that leaks out is provided with: dredge seam (7), pipeline (8), 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 (9) that three angles are the rotor of 10 ° or 7.5 ° fully when static state; In the hot junction, cold junction fanning strip inboard be respectively equipped with one or several arranged radially dredge seam (7) and auxiliary ease-hole (71), the axial sealing plate inboard is provided with that one or several vertically arranges dredges seam (72) and auxiliary ease-hole (73), dredges seam and reaches and assist the position of ease-hole between from fume side to the air inlet side 2 °～28 ° of hot junction, cold junction fanning strip and axial sealing plate; It is characterized in that: the described radial and axial seal that is fixed on the rotor dividing plate is sealing brush (51,52), and the bristle of sealing brush is the wire with one group of dense arrangement that high resiliency, material high temperature resistant, rub resistance make; Leave the gap between the brush holder part of sealing brush and upper and lower fanning strip and the side plate inner face, this gap is less than the bristle lengths of sealing brush, and bristle withstands upper and lower fanning strip and side plate inner face.
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 on hot junction, cold junction fanning strip and the axial sealing plate fastens the box-girder (23,33) that this dredges seam and auxiliary ease-hole, and this box-girder be divided into one or several independent dredge chamber (22), each dredges pipeline, the header of chamber by independently dredging pipe (24) 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 inlet 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, this box-girder fastens 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.
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, the outer end of described hot junction, cold junction fanning strip and axial sealing plate also is provided with dredges seam (44,34).
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, dredge the seam width by fanning strip the inner outward direction increase progressively gradually, 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, dredge the seam width by fanning strip the inner outward direction increase progressively gradually, 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 each pressure transmitter of dredging the chamber 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 outlet of boiler fan or inlet, the outlet of secondary wind, the female pipe of secondary wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200428158U CN201992680U (en) | 2011-02-21 | 2011-02-21 | Dredge type air leakage control device with sealing brushes for Junker type air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200428158U CN201992680U (en) | 2011-02-21 | 2011-02-21 | Dredge type air leakage control device with sealing brushes for Junker type air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201992680U true CN201992680U (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200428158U Expired - Fee Related CN201992680U (en) | 2011-02-21 | 2011-02-21 | Dredge type air leakage control device with sealing brushes for Junker type air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201992680U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453540A (en) * | 2012-05-29 | 2013-12-18 | 株式会社日立制作所 | Boiler |
| CN104806579A (en) * | 2015-04-03 | 2015-07-29 | 邹中宝 | Control assembly for fan blade rotary shaft of axial flow draught fan |
-
2011
- 2011-02-21 CN CN2011200428158U patent/CN201992680U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453540A (en) * | 2012-05-29 | 2013-12-18 | 株式会社日立制作所 | Boiler |
| CN104806579A (en) * | 2015-04-03 | 2015-07-29 | 邹中宝 | Control assembly for fan blade rotary shaft of axial flow draught fan |
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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: Dredge type air leakage control device with sealing brushes for Junker type air preheater Granted publication date: 20110928 License type: Exclusive License Record date: 20120113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20190221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |