CN205079257U - Modified air preheater is from kissing box -shaped resilient means - Google Patents
Modified air preheater is from kissing box -shaped resilient means Download PDFInfo
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- CN205079257U CN205079257U CN201520842505.2U CN201520842505U CN205079257U CN 205079257 U CN205079257 U CN 205079257U CN 201520842505 U CN201520842505 U CN 201520842505U CN 205079257 U CN205079257 U CN 205079257U
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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 a modified air preheater is from kissing box -shaped resilient means, comprises a box bod, the box body is the cavity cavity, and the top of box body is equipped with the open slot, and a lateral wall of box body is equipped with the connecting hole, is equipped with in the box body to support seal assembly, support seal assembly and include support slider and set up in the sealed slider of support slider upside, and follow at the top of sealed slider the open slot stretches out, be equipped with elastic component between the bottom plate of box body and the support slider. The utility model discloses a superior effect lies in: fix with the air preheater sealing member in connecting hole, partition panel and the connecting bolt of box body one side through setting up to and the partition panel passes through connecting bolt and is connected with the air preheater connecting piece, and then forms two pass seal structure, and simple structure, sealed effectual, long service life move stably, safe and reliable.
Description
Technical field
The utility model relates to technical field of heat exchange, is specifically related to a kind of Self-engaged box-type elastic device for air preheater of improvement.
Background technology
Rotary regenerative air preheater is a kind of heat-exchange apparatus for large-sized boiler, the air that it utilizes the heat of boiler smoke to come needed for heating flame, improves the efficiency of boiler with this.Rotary regenerative air preheater is primarily of compositions such as central shaft, rotor, the heat exchange element be contained in rotor lattice storehouse, rotor case, transition cigarette air channel, top structure, polycrystalline substance, top fanning strip, bottom fanning strip, arc, spring bearing, guide bearing, drive units.Most important parts are rotors, and rotor is divided into several lattice storehouses by a lot of radial dividing plates and hoop dividing plate by rotor, places heat exchange element in lattice storehouse.
Rotor realizes the heat exchange between flue gas and air by heat exchange element and radial and axial diaphragm seal is installed by rotor radial dividing plate when rotating.Bottom apex seal and bottom fanning strip, top apex seal and top fanning strip, axial seal sheet and arc contact or keep very little distance in hot operation, form the sealing between flue gas and air.The sealing property of air preheater, is one of most important performance indications, directly affects boiler efficiency.
Due to air preheater operationally air side be malleation, fume side is negative pressure, and air can be leaked to fume side by the gap between diaphragm seal and fanning strip, arc, and this will reduce pressure fan, the exerting oneself of air-introduced machine, thus affects whole boiler efficiency.The air leak rate of air curtain of air preheater is the important indicator affecting boiler efficiency, and air leak rate of air preheater is lower, and boiler efficiency is higher.Improving boiler efficiency by transformation air preheater, is very economical, effective method.Under hot running status, each parts of air preheater all can expand because being heated, and rotor can become mushroom, and the gap between rotor and fanning strip, arc can change, and most of gap all can diminish.Under hot running status, if excesssive gap, air leak rate of air preheater will be caused very large, if too small, air preheater may be caused stuck.The air leak rate of air curtain of air preheater is the key factor affecting boiler operating efficiency, so the sealing between air and flue gas, seems particularly important, the Sealing Technology of air preheater, one of core technology of Ye Shige air preheater producer.
The Sealing Technology transformation project of air preheater is after country lists energy-saving and emission-reduction project in, and each thermal power plant is how accomplishing to reduce preheater air leak rate of air curtain, and technical security is reliable as mainly dealing with problems.The leaking out of a lot of power plant preheater reaches more than 15% even higher, and a lot of power plant air preheater also has stifled ash in addition, causes the problems such as maintenance cost is high.The ten Duo Jia technological transformation producers such as the air preheater reforming enterprise of current China mainly contains Britain Howden, Huaneng Group, Beijing reaches, wherein the VN Sealing Technology of Britain Howden occupies most of market share, and the flexible contact type sealing that Huaneng Group, Beijing reaches company is very fast in China market development in the recent period.But this project reconstruction cost is higher, and technical requirement is higher.Rotary regenerative air preheater sealing device mainly adopts following several form: one is adjustable sealing.Fanning strip and arc can be adjusted by automatic or manual, and wherein fanning strip can adjust mostly automatically; Two is fixed sealings: Howden company of Britain has this technology, according to rotary regenerative air preheater operational factor, precompute the expansion clearance between hot lower sealing piece and fanning strip, arc, reserve out when mounted, after expanding during to ensure hot operation, reach best sealing state.Because epitrochanterian diaphragm seal is that between rotor and fanning strip, air preheater top and bottom structure " thermal expansion difference ", calculate and method of adjustment complexity, construction requirement is strict with fanning strip, cold conditions gap between arc.This technology is only grasped by Howden company, and as core technology, usually client's cold conditions setting data and establishing method is not supplied to, sealing sheet only has 1 ~ 3mm thickness, run several years just because ash cutting and corrosion needs are changed, because the core technology of gap setting is monopolized, can only specialized company be asked at high price again to carry out gap setting, costly.Simultaneously because the calculating in cold conditions gap and adjustment still exist error, between fanning strip and diaphragm seal, still there is certain leakage-gap.And owing to being the gap width calculated by specified running status, in abnormal (as the cigarette temperature abnormality) situation of boiler operatiopn, easily cause the situation that rotor is stuck; Three is the sealings of self-lubricating flexible contact type; Diaphragm seal is that the self-lubricating alloy material utilizing spring hinge structure to form makes, still to fit well during to ensure space change static seal surface, ensure sealing, existing market prospect is better, but this project reconstruction cost is higher, technical requirement is higher, owing to needing to use special core material, the said firm is disclosed, after can not ensureing repowering, oneself's maintenance is debugged, maintenance cost after quality guarantee period is higher, and the cost price of transformation is very high, causes a lot of required transformation producer to wait for because of cost issues and looks around.
Utility model content
In order to overcome defect of the prior art, the purpose of this utility model is the Self-engaged box-type elastic device for air preheater proposing a kind of improvement.
The utility model is achieved through the following technical solutions:
A Self-engaged box-type elastic device for air preheater for improvement, comprises box body, and described box body is hollow cavity, and the top of box body is provided with open slot, and a sidewall of box body is provided with connecting hole, is provided with support black box in box body; Described support black box comprises support slipper and is arranged at the sealing slide block on the upside of support slipper, and the top of sealing slide block is stretched out from described open slot; Elastic parts is provided with between the base plate of box body and support slipper.
Described technical scheme is preferably, and described box body is rectangular box.
Described technical scheme is preferably, and described support slipper and sealing slide block are bolted.
Described technical scheme is preferably, and the bottom of support slipper is provided with some shrinkage pools, and the base plate of box body is provided with the projection corresponding with shrinkage pool, and described elastic parts is arranged between shrinkage pool and projection.
Described technical scheme is preferably, and the center of described projection is provided with ash discharging hole.
Described technical scheme is preferably, and described elastic parts is spring.
Described technical scheme is preferably, and described box body is fixed on air preheater connector by partition panel.
Compared with prior art, superior effect described in the utility model is:
(1) good sealing effect, control air preheater air leakage rate was not more than 6% in 1 year, repaiies in the phase and be not more than 8% in one;
(2) long service life, adopt and support black box, and described support black box and air preheater seal form double-channel sealing structure, the preset clearance operationally produced during different load compensates, guarantee the economical operation security of equipment, can not as thin diaphragm seal easy formation ash cutting, can need not change support black box for a long time;
(3) stable, safe and reliable, because the utility model elastic device is made from multiple components, reserved expansion clearance between each parts, namely in the situation of air preheater generation overtemperature, the abnormal expansion such as to catch fire, also can not cause air preheater stuck;
(4) mounting process is simple, described elastic device does not need to calculate hot gap, also without the need to being limited by material technology design or production Technology monopolization, adapt to use the oneself of producer to overhaul installation, all need not carry out seal clearance calculating again, considerably reduce installation and maintenance workload;
(5) cheap, structure is simple, parts are easily produced.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Self-engaged box-type elastic device for air preheater of described a kind of improvement;
Fig. 2 is for the A of elastic device shown in Fig. 1 is to enlarged diagram;
The B direction view that Fig. 3 is elastic device shown in Fig. 2;
Fig. 4 is the using state figure of described elastic device.
Description of reference numerals is as follows:
1-box body, 11-connecting hole, 12-support black box, 121-support slipper, 122-seal slide block, 123-shrinkage pool, 124-projection, 125-ash discharging hole, 13-elastic parts, 2-partition panel, 3-air preheater connector, 4-air preheater seal.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail.
As shown in accompanying drawing 1-4, the Self-engaged box-type elastic device for air preheater of a kind of improvement described in the utility model, comprises box body 1, described box body 1 is hollow cavity, the top of box body 1 is provided with open slot, and a sidewall of box body 1 is provided with connecting hole 11, is provided with and supports black box 12 in box body 1; Described support black box 12 comprises support slipper 121 and is arranged at the sealing slide block 122 on the upside of support slipper 121, and the top of sealing slide block 122 is stretched out from described open slot; Elastic parts 13 is provided with between the base plate of box body 1 and support slipper 121.Described support slipper 121 is set to two, is arranged at the two ends of the open slot in box body 1 respectively.
In the present embodiment, described box body 1 is rectangular box.Described support slipper 121 is connected by bolt (not shown) with sealing slide block 122.For the ease of arranging elastic parts 13, the bottom of described support slipper 121 is provided with some shrinkage pools 123, and the base plate of box body 1 is provided with the projection 124 corresponding with shrinkage pool 123, and described elastic parts 13 is arranged between shrinkage pool 123 and projection 124.For the ease of ash discharge, be provided with ash discharging hole 125 at the center of described projection 124.Described elastic parts 13 is spring.Described box body 1 is fixed on air preheater connector 3 by partition panel 2.
In the specific implementation, as shown in Figure 4, the Self-engaged box-type elastic device for air preheater of improvement described in the utility model, by being arranged at the connecting hole 11 of box body 1 side, partition panel 2 and connecting bolt and air preheater seal 4 is fixed, described partition panel 2 is connected with air preheater connector 3 by connecting bolt, and then formation double-channel sealing structure, the preset clearance operationally produced during different load compensates, and guarantees the economical operation security of equipment.
The utility model is not limited to above-mentioned embodiment, and when not deviating from flesh and blood of the present utility model, any distortion that it may occur to persons skilled in the art that, improvement, replacement all fall into scope of the present utility model.
Claims (7)
1. the Self-engaged box-type elastic device for air preheater improved, comprise box body, it is characterized in that, described box body is hollow cavity, and the top of box body is provided with open slot, and a sidewall of box body is provided with connecting hole, is provided with support black box in box body; Described support black box comprises support slipper and is arranged at the sealing slide block on the upside of support slipper, and the top of sealing slide block is stretched out from described open slot; Elastic parts is provided with between the base plate of box body and support slipper.
2. the Self-engaged box-type elastic device for air preheater of a kind of improvement according to claim 1, is characterized in that, described box body is rectangular box.
3. the Self-engaged box-type elastic device for air preheater of a kind of improvement according to claim 1, is characterized in that, described support slipper and sealing slide block are bolted.
4. the Self-engaged box-type elastic device for air preheater of a kind of improvement according to claim 1, is characterized in that, the bottom of support slipper is provided with some shrinkage pools, and the base plate of box body is provided with the projection corresponding with shrinkage pool, and elastic parts is arranged between shrinkage pool and projection.
5. the Self-engaged box-type elastic device for air preheater of a kind of improvement according to claim 4, is characterized in that, the center of described projection is provided with ash discharging hole.
6. the Self-engaged box-type elastic device for air preheater of a kind of improvement according to claim 1, is characterized in that, described elastic parts is spring.
7. the Self-engaged box-type elastic device for air preheater of a kind of improvement according to claim 1 and 2, is characterized in that, described box body is fixed on air preheater connector by partition panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520842505.2U CN205079257U (en) | 2015-10-28 | 2015-10-28 | Modified air preheater is from kissing box -shaped resilient means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520842505.2U CN205079257U (en) | 2015-10-28 | 2015-10-28 | Modified air preheater is from kissing box -shaped resilient means |
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| CN205079257U true CN205079257U (en) | 2016-03-09 |
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| CN201520842505.2U Active CN205079257U (en) | 2015-10-28 | 2015-10-28 | Modified air preheater is from kissing box -shaped resilient means |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937862A (en) * | 2016-06-21 | 2016-09-14 | 陕西益杰机电科技有限公司 | HDT thermal compensation follow sealing system for rotary heat exchanger |
| CN112610978A (en) * | 2020-12-22 | 2021-04-06 | 南京市利澜电力节能科技有限公司 | Novel supporting structure of air preheater gasket |
| CN112610977A (en) * | 2020-12-22 | 2021-04-06 | 南京市利澜电力节能科技有限公司 | A installation mechanism for installing air preheater gasket |
-
2015
- 2015-10-28 CN CN201520842505.2U patent/CN205079257U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937862A (en) * | 2016-06-21 | 2016-09-14 | 陕西益杰机电科技有限公司 | HDT thermal compensation follow sealing system for rotary heat exchanger |
| CN105937862B (en) * | 2016-06-21 | 2018-04-10 | 陕西益杰机电科技有限公司 | A kind of HDT thermal compensation Follow-up seal systems of heat wheel |
| CN112610978A (en) * | 2020-12-22 | 2021-04-06 | 南京市利澜电力节能科技有限公司 | Novel supporting structure of air preheater gasket |
| CN112610977A (en) * | 2020-12-22 | 2021-04-06 | 南京市利澜电力节能科技有限公司 | A installation mechanism for installing air preheater gasket |
| CN112610978B (en) * | 2020-12-22 | 2023-03-24 | 南京市利澜电力节能科技有限公司 | Novel supporting structure of air preheater gasket |
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