CN204554866U - The sealing device of rotary regenerative air preheater - Google Patents
The sealing device of rotary regenerative air preheater Download PDFInfo
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- CN204554866U CN204554866U CN201520172544.6U CN201520172544U CN204554866U CN 204554866 U CN204554866 U CN 204554866U CN 201520172544 U CN201520172544 U CN 201520172544U CN 204554866 U CN204554866 U CN 204554866U
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- diaphragm seal
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- flexible sealing
- hard diaphragm
- 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 discloses a kind of sealing device of rotary regenerative air preheater, comprise rotary regenerative air preheater is arranged sealing block, rotor plurality of partitions, horizontal stud is equipped with in one end of every block dividing plate and sealing block vicinity, on every root stud, all cover has hard diaphragm seal, the gripper shoe of bending, flexible sealing fin, dividing plate is close in the outside of hard diaphragm seal, and the stud inside hard diaphragm seal is provided with clamp nut; The thickness of flexible sealing fin is less than hard diaphragm seal, one end of flexible sealing fin and sealing block vicinity bends, the stud of flexible sealing fin both sides is provided with clip plate and outer plate, gripper shoe is close to the clip plate of contiguous flexible sealing fin, the end of gripper shoe bending contacts with hard diaphragm seal, and the stud of gripper shoe and outer plate both sides is equipped with clamp nut.The utility model has the advantage that air leak rate of air curtain is low, structure reliable, highly versatile, reliability are high.
Description
Technical field
The utility model relates to a kind of sealing device for boiler tail rotary regenerative air preheater.
Background technology
Its operation principle of rotary regenerative air preheater that boiler tail uses is: the metal heat accumulating element being processed into special ripple is closely situated in the lattice of rotor fan-shaped storehouse, rotor rotates with certain rotating speed, its left and right two halves part is respectively flue gas and air duct, air side again or be divided into First air passage and secondary air channel, when flue gas flows through rotor, flue gas is by thermal release to heat accumulating element, and flue-gas temperature reduces; When heat accumulating element rotates to air side, again by thermal release to air, air themperature raise.So go round and begin again circulation, realizes the heat exchange of flue gas and air.Rotary regenerative air preheater is generally placed in denitration outlet or economizer exit, pre-heater inlet flue gas is generally more than 350 DEG C, exit gas temperature is generally below 150 DEG C, and cold air generally will be heated to more than 300 DEG C from 20 DEG C, this equipment reduces exhaust gas temperature, improves boiler efficiency.
Rotary regenerative air preheater is rotary machine, because rotor mushroom deformation can occur when hot, certain gap is always there is between the rotor rotated and static casing, because the side air side in preheater is malleation, and opposite side fume side is negative pressure, there is pressure reduction between both sides, cause portion of air to be drained in flue gas by the gap of air side and fume side boundary and go.Rotary air preheater air leak forms: directly leak out and carry and leak out, and due to the version that rotary regenerative air preheater is special, carries and leaks out unavoidably.Therefore, reduce the air leak rate of air curtain of preheater, reducing directly leaks out is crucial.
Reduce air-heater leakage, the power consumption of pressure fan (comprising primary air fan), air-introduced machine can be reduced, and minimizing hot blast leaks the part heat loss due to exhaust gas brought.Too high rotary air preheater air leak rate can cause the undercapacity of pressure fan, air-introduced machine, even causes unit on-load ability to decline.
In order to reduce the air leak rate of air curtain of heat exchanger, adopt radial seal, axial seal and bypass seal.Radial seal or axial seal, include the sealing block that air heat exchanger sets firmly, the diaphragm seal be located at epitrochanterian plurality of partitions and be located on dividing plate, as Chinese patent CN 203098863U proposes a kind of contact flexible sealing assembly, sealing assembly has three diaphragm seals to contact with sealing block, the electric current of driving motor can be increased, exacerbate the wearing and tearing of diaphragm seal and sealing block, this assembly mounting and adjusting is also more loaded down with trivial details simultaneously.Chinese patent CN 102705859A has invented a kind of flexible seal device, and the sealing of this device is simple, but is difficult to meet lower air leak rate of air curtain requirement; Other are as the shortcoming of spring block type hermetically-sealed construction and wire brush flexible sealing structure all existence and stability and reliability deficiency.
Summary of the invention
For reducing rotary air preheater air leak, the utility model provides a kind of sealing device of rotary regenerative air preheater, the advantage that it has, and air leak rate of air curtain is low, structure reliable, highly versatile, reliability are high.
In order to achieve the above object, the sealing device of rotary regenerative air preheater of the present utility model, comprise rotary regenerative air preheater is arranged sealing block, rotor plurality of partitions, it is characterized in that: be equipped with horizontal stud in one end of every block dividing plate and sealing block vicinity, on every root stud, all cover has hard diaphragm seal, the gripper shoe of bending, flexible sealing fin, dividing plate is close in the outside of hard diaphragm seal, and the stud inside hard diaphragm seal is provided with clamp nut; The thickness of flexible sealing fin is less than hard diaphragm seal, one end of flexible sealing fin and sealing block vicinity bends, the stud of flexible sealing fin both sides is provided with clip plate and outer plate, gripper shoe is close to the clip plate of contiguous flexible sealing, the end of gripper shoe bending contacts with hard diaphragm seal, and the stud of gripper shoe and outer plate both sides is equipped with clamp nut;
The utility model can be used for radial seal or the axial seal of rotary regenerative air preheater; Flexible sealing fin and hard diaphragm seal are steel plateelement, rotary regenerative air preheater is when hot work, epitrochanterian dividing plate rotates, flexible sealing fin on each dividing plate and hard diaphragm seal are constantly near sealing block, and hard diaphragm seal reduces the circumference that leaks out after sealing block on the one hand, and flexible sealing fin is close to sealing block on the other hand, form tighter sealing circumference, also allow fluid flow the pressure span classification of flexible sealing fin and hard diaphragm seal simultaneously, reduce the pressure reduction at place of leaking out, reduce air leak rate of air curtain; The flexible sealing fin of bending has good elasticity and toughness, and the current fluctuation of preheater drive motors also can be avoided when contacting with sealing block excessive; Hard diaphragm seal and flexible sealing fin are fixed by the clamp nut of gripper shoe, clip plate and outer plate and correspondence, are supported respectively, not easily lose efficacy, and have the advantage that structure is reliable, highly versatile, reliability are high;
Preferred as one, between hard diaphragm seal and the clamp nut of inner side, be also provided with the inner deflector bent to the inside, between outer plate and the clamp nut in outside, be also provided with the outer deflector bent laterally; Can define one brattice before respective diaphragm seal, this brattice can stop and leaks out, and controls air leak rate of air curtain further;
Preferred as one, the end of clip plate and outer plate all bends in the same way with flexible sealing fin, the end of outer plate is higher than the end of outer deflector, the end of end higher than outer plate of flexible sealing fin and the end of clip plate, the Drain Resistance effect of support effect and brattice, higher than the end of inner deflector, can be improved in the end of hard diaphragm seal;
In sum, the utility model has the advantage that air leak rate of air curtain is low, structure reliable, highly versatile, reliability are high.
Accompanying drawing explanation
Fig. 1 is the front view of the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the sealing device of this rotary regenerative air preheater, comprise the sealing block 1 that air preheater is arranged, plurality of partitions 2 on rotor (not shown), one end contiguous with sealing block 1 at every block dividing plate 2 is equipped with horizontal stud 3, stud 3 is through corresponding dividing plate 2, on every root stud 3, all cover has hard diaphragm seal 4, the gripper shoe 5 of bending, flexible sealing fin 6, dividing plate 2 is close in the outside of hard diaphragm seal 4, the inner deflector 7 bent to the inside is provided with in the inner side of hard diaphragm seal 4, stud 3 inside deflector 7 is provided with clamp nut 8, the end of hard diaphragm seal 4 is higher than the end of inner deflector 7, the thickness of flexible sealing fin 6 is less than hard diaphragm seal 4, flexible sealing fin 6 bends with one end of sealing block 1 vicinity, the stud 3 of flexible sealing fin 6 both sides is provided with clip plate 9 and outer plate 10, the end of clip plate 9 and outer plate 10 all bends in the same way with flexible sealing fin 6, gripper shoe 5 is close to the clip plate 9 of contiguous flexible sealing fin 6, the end that gripper shoe 5 bends contacts with hard diaphragm seal 4, the outer deflector 11 bent laterally is also provided with in the outside of outer plate 10, the end of outer plate 10 is higher than the end of outer deflector 11, the end of end higher than outer plate 10 of flexible sealing fin 6 and the end of clip plate 9, the stud 3 of gripper shoe 5 and outer deflector 11 both sides is equipped with clamp nut 12,13,
The utility model can be used for radial seal or the axial seal of rotary regenerative air preheater; Flexible sealing fin 6 and hard diaphragm seal 4 are steel plateelement, and rotary regenerative air preheater is when hot work, and rotor rotates and produces mushroom deformation, in the process that hard diaphragm seal 4 is mutually close with sealing block 1, reduces the circumference that leaks out; Flexible sealing fin 6 is close with sealing block 1, and finally realizes contact, reduces to leak out circumference further, also allows fluid flow the pressure span classification of flexible sealing fin 6 and hard diaphragm seal 4 simultaneously, reduces the pressure reduction at place of leaking out, reduces air leak rate of air curtain; The flexible sealing fin 6 of bending has good elasticity, ensure flexible sealing fin 6 with between sealing block 1 near after effectively to contact, hard diaphragm seal 4 and flexible sealing fin 6 respectively fixing by the clamp nut 8,12,13 of gripper shoe 5, clip plate 9 and outer plate 10 and correspondence, support, not easily lost efficacy, there is the advantage that structure is reliable, highly versatile, reliability are high; Outer deflector 11 and the inner deflector 7 of bending can make fluid turn to, and have guide functions, control air leak rate of air curtain further.
Claims (3)
1. the sealing device of a rotary regenerative air preheater, comprise air preheater is arranged sealing block, rotor plurality of partitions, it is characterized in that: be equipped with horizontal stud in one end of every block dividing plate and sealing block vicinity, on every root stud, all cover has hard diaphragm seal, the gripper shoe of bending, flexible sealing fin, dividing plate is close in the outside of hard diaphragm seal, and the stud inside hard diaphragm seal is provided with clamp nut; The thickness of flexible sealing fin is less than hard diaphragm seal, one end of flexible sealing fin and sealing block vicinity bends, the stud of flexible sealing fin both sides is provided with clip plate and outer plate, gripper shoe is close to the clip plate of contiguous hard diaphragm seal, the end of gripper shoe bending contacts with hard diaphragm seal, and the stud of gripper shoe and outer plate both sides is equipped with clamp nut.
2. the sealing device of rotary regenerative air preheater according to claim 1, it is characterized in that: between hard diaphragm seal and the clamp nut of inner side, be provided with the inner deflector bent to the inside, between outer plate and the clamp nut in outside, be provided with the outer deflector bent laterally.
3. the sealing device of rotary regenerative air preheater according to claim 2, it is characterized in that: the end of clip plate and outer plate all bends in the same way with flexible sealing fin, the end of outer plate is higher than the end of outer deflector, the end of end higher than outer plate of flexible sealing fin and the end of clip plate, the end of hard diaphragm seal is higher than the end of inner deflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172544.6U CN204554866U (en) | 2015-03-26 | 2015-03-26 | The sealing device of rotary regenerative air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172544.6U CN204554866U (en) | 2015-03-26 | 2015-03-26 | The sealing device of rotary regenerative air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204554866U true CN204554866U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520172544.6U Active CN204554866U (en) | 2015-03-26 | 2015-03-26 | The sealing device of rotary regenerative air preheater |
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| Country | Link |
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| CN (1) | CN204554866U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020738A (en) * | 2015-08-20 | 2015-11-04 | 周一方 | Air preheater for thermal power plant |
| CN106051813A (en) * | 2016-07-01 | 2016-10-26 | 四川东方能源科技股份有限公司 | Assembly used for mounting radial sealing pad of air preheater |
-
2015
- 2015-03-26 CN CN201520172544.6U patent/CN204554866U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020738A (en) * | 2015-08-20 | 2015-11-04 | 周一方 | Air preheater for thermal power plant |
| CN106051813A (en) * | 2016-07-01 | 2016-10-26 | 四川东方能源科技股份有限公司 | Assembly used for mounting radial sealing pad of air preheater |
| CN106051813B (en) * | 2016-07-01 | 2017-03-22 | 四川东方能源科技股份有限公司 | Assembly used for mounting radial sealing pad of air preheater |
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