CN205372614U - Air preheater - Google Patents
Air preheater Download PDFInfo
- Publication number
- CN205372614U CN205372614U CN201521076230.2U CN201521076230U CN205372614U CN 205372614 U CN205372614 U CN 205372614U CN 201521076230 U CN201521076230 U CN 201521076230U CN 205372614 U CN205372614 U CN 205372614U
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- CN
- China
- Prior art keywords
- air preheater
- tube
- tube sheet
- pipe
- demountable
- 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.)
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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 an air preheater, including heat exchange tube group, install on the relative tube sheet that sets up at heat exchange tube group's both ends, and heat exchange tube group is used for can dismantling the nest of tubes with the fixed stay pipe of both ends tube sheet with many by many, and the both ends of stay pipe rigid coupling respectively can be dismantled the both ends of pipe and stretch out the outer terminal surface of tube sheet respectively and fix with the fastener on the tube sheet, are equipped with sealing device between fastener and the tube sheet, can dismantle the quantity of managing in the stay in large quantity of pipe. When air preheater need to some can dismantle the pipe only need when changing simple change this part can dismantle the pipe can, reduced work load and the spending of changing air preheater on the one hand, again the very big time that has shortened the maintenance, lengthened air preheater operation bulk life time, for the enterprise has lightened the cost of air preheater operation maintenance, also for air preheater satisfies that the requirement that further reduces the fume emission temperature and the more abominable operating condition of adaptation provides maybe.
Description
Technical field
This utility model relates to a kind of air preheater.
Background technology
Air preheater is the visual plant of boiler low-temperature section flue gas waste heat recovery, day by day harsh recently as what overall boiler efficiency of energy utilization was examined, how to reduce one of exhaust gas temperature important topic becoming boiler research further.Air preheater conventional at present mostly is tubular preheater, and the main heat transfer parts of tubular preheater are thin-wall steel tubes.Tubular air preheater is many, and in cube, steel pipe is vertically staggered each other, and two ends are welded on the tube sheet being oppositely arranged up and down, and flue gas is along steel pipe down through preheater, and air, then laterally across preheater, completes heat conduction.
Final stage heat transmission equipment before discharging as boiler smoke for air preheater most of boilers at present is to determining that exhaust gas temperature is significant, and the variation day by day along with boiler oil, the operating condition of air preheater is also more and more severe, and what cause the heat exchanger tube extent of corrosion in air preheater aggravates the shortening with service life.Owing to every examination parameter of boiler operatiopn can be had a strong impact on when heat exchanger tube corrosion and damage causes and leaks out, blowing out replacing must be carried out when leaking out serious, but in general the damage situations of diverse location heat exchanger tube is different, unnecessary waste is not only existed if carried out integral replacing, the substantial amounts of time can be wasted again on the other hand, bring great loss.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of air preheater being conveniently replaceable impaired heat exchanger tube.
For solving above-mentioned technical problem, this utility model includes set of heat exchange tubes, the two ends of described set of heat exchange tubes are arranged on the tube sheet being oppositely arranged, it is structurally characterized in that described set of heat exchange tubes and is formed for the stay bolt pipe that two ends tube sheet is fixing and many demountable tubes by many, the two ends of described stay bolt pipe are respectively and fixedly connected on tube sheet, the outer face of the both ends of described demountable tube protruded tube plate respectively is also fixed with securing member, is provided with sealing device between described securing member and tube sheet；The quantity of described demountable tube is more than the quantity of stay bolt pipe.
The end of described many stay bolt pipes is welded on tube sheet.
Described many stay bolt pipes are distributed on tube sheet, are interval with many demountable tubes between adjacent two stay bolt pipes.
Described stay bolt pipe is identical with the caliber of demountable tube.
The outer surface at the both ends of described demountable tube is respectively equipped with external screw thread, and described securing member is nut.
Described tube sheet outer face is provided with deep gouge around demountable tube, is provided with sealing device in described deep gouge.
Described sealing device is sealing gasket.
nullAfter adopting said structure，Detachable being arranged on tube sheet of demountable tube in this utility model，And adopt sealing device to seal，Overcoming original heat exchanger tube all adopts welded seal mode to cause the not easily changeable problem of single heat exchanger tube，And the convertibility of the single heat exchanger tube of tube case of air preheater is effectively raised by this kind of sealing means，Under the premise ensureing the every serviceability of tube case of air preheater，Have only to when air preheater needs and some demountable tube is replaced simply change this part demountable tube，Decrease the workload changing air preheater and spending on the one hand，Shorten again the time of maintenance greatly，Extend air preheater and run bulk life time，The cost of air preheater operation maintenance is alleviated for enterprise，Also meet, for air preheater, the requirement reducing smog discharge temperature further and the more severe operating condition of adaptation provides possibility.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, this utility model is described in further detail:
Fig. 1 is structural representation of the present utility model；
Fig. 2 is Fig. 1 structural representation overlooked；
Fig. 3 is the part-structure schematic diagram of this utility model section view.
Detailed description of the invention
As shown in Figure 1 to Figure 3, air preheater includes set of heat exchange tubes, in this utility model, set of heat exchange tubes is formed for the stay bolt pipe 2 that two ends tube sheet is fixing and Duo Gen demountable tube 3 by many, wherein stay bolt pipe 2 is identical with the caliber of demountable tube 3, and the quantity of demountable tube 3 is far more than the quantity of stay bolt pipe 2.Many stay bolt pipes 2 are distributed on tube sheet 1, it is interval with many demountable tubes 3 between adjacent two stay bolt pipes 2, the two ends of stay bolt pipe 2 are respectively welded on tube sheet 1, two tube sheets 1 being oppositely arranged mainly are fixed by its effect, so the quantity of stay bolt pipe 2 is advisable to fix tube sheet 1, specifically can select according to the size of tube sheet 1.The outer face of the both ends of demountable tube 3 protruded tube plate 1 respectively is also fixed with securing member, in the present embodiment, demountable tube 3 is provided with external screw thread at the outer surface of the section of stretching out, nut selected by securing member 4, being provided with sealing device 5 between securing member 4 and tube sheet 1, in the present embodiment, the sealing gasket of simple in construction selected by sealing device.For improving sealing effectiveness, being provided with deep gouge in tube sheet 1 outer face around demountable tube 3, sealing gasket is arranged in deep gouge.
Majority demountable tube 3 and tube sheet 1 are used thread seal by this utility model, are evenly arranged an appropriate number of stay bolt pipe 2 on tube case of air preheater, and stay bolt pipe 2 and tube sheet 1 welded seal play the effect of fixed tube sheet 1；The two ends cutted thread of demountable tube 3, uses nut to fasten, and tube sheet 1 boring is carried out reaming and places sealing gasket, rotates nut compression sealing gasket by two ends and makes it be radially expanded, thus reaching good sealing effectiveness.When indivedual demountable tube 3 seriously corrodeds need to change, it is only necessary to the sealing nut at two ends is outwarded winding, extracts this demountable tube 3 out and be replaced, the sealing gasket simultaneously more renewed, then nut is screwed again, complete the maintenance of air preheater.nullWhat in this utility model, demountable tube 3 was detachable is arranged on tube sheet 1，And adopt sealing gasket to seal，Overcoming original heat exchanger tube all adopts welded seal mode to cause the not easily changeable problem of single heat exchanger tube，And the convertibility of the single heat exchanger tube of tube case of air preheater is effectively raised by this kind of sealing means，Under the premise ensureing the every serviceability of tube case of air preheater，Have only to when air preheater needs and some demountable tube 3 is replaced simply change this part demountable tube 3，Decrease the workload changing air preheater and spending on the one hand，Shorten again the time of maintenance greatly，Extend air preheater and run bulk life time，The cost of air preheater operation maintenance is alleviated for enterprise，Also meet, for air preheater, the requirement reducing smog discharge temperature further and the more severe operating condition of adaptation provides possibility.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model.This utility model has been described in detail by previous embodiment, and for a person skilled in the art, the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature carries out equivalent replacement.In every case within inventive concept scope of the present utility model, any amendment of making, equivalent replacement, improvement etc., it is all contained within protection domain of the present utility model.
Claims (7)
1. an air preheater, including set of heat exchange tubes, the two ends of described set of heat exchange tubes are arranged on the tube sheet (1) being oppositely arranged, it is characterized in that described set of heat exchange tubes is formed for the stay bolt pipe (2) that two ends tube sheet (1) is fixing and many demountable tubes (3) by many, the two ends of described stay bolt pipe (2) are respectively and fixedly connected on tube sheet (1), the both ends of described demountable tube (3) are distinguished the outer face of protruded tube plate (1) and fix with securing member (4), are provided with sealing device between described securing member and tube sheet (1)；The quantity of described demountable tube (3) is more than the quantity of stay bolt pipe (2).
2. air preheater according to claim 1, is characterized in that the end of described many stay bolt pipes (2) is welded on tube sheet (1).
3. air preheater according to claim 1, is characterized in that described many stay bolt pipes (2) are distributed on tube sheet (1), is interval with many demountable tubes (3) between adjacent two stay bolt pipes (2).
4. air preheater according to claim 1, is characterized in that described stay bolt pipe (2) is identical with the caliber of demountable tube (3).
5. air preheater according to any one of claim 1 to 4, is characterized in that the outer surface at the both ends of described demountable tube (3) is respectively equipped with external screw thread, and described securing member is nut.
6. air preheater according to claim 5, is characterized in that described tube sheet (1) outer face is provided with deep gouge around demountable tube (3), is provided with sealing device (5) in described deep gouge.
7. air preheater according to claim 6, is characterized in that described sealing device is sealing gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521076230.2U CN205372614U (en) | 2015-12-22 | 2015-12-22 | Air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521076230.2U CN205372614U (en) | 2015-12-22 | 2015-12-22 | Air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205372614U true CN205372614U (en) | 2016-07-06 |
Family
ID=56259732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521076230.2U Active CN205372614U (en) | 2015-12-22 | 2015-12-22 | Air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205372614U (en) |
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2015
- 2015-12-22 CN CN201521076230.2U patent/CN205372614U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |