CN202692114U - Horizontal type durable air preheater - Google Patents
Horizontal type durable air preheater Download PDFInfo
- Publication number
- CN202692114U CN202692114U CN2012203154421U CN201220315442U CN202692114U CN 202692114 U CN202692114 U CN 202692114U CN 2012203154421 U CN2012203154421 U CN 2012203154421U CN 201220315442 U CN201220315442 U CN 201220315442U CN 202692114 U CN202692114 U CN 202692114U
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- China
- Prior art keywords
- pipe
- tube
- heat exchanger
- upper level
- tube sheet
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- 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.)
- Expired - Lifetime
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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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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Air Supply (AREA)
Abstract
The utility model discloses a horizontal type durable air preheater which comprises a shell body, a smoke inlet arranged at the upper end of the shell body and a smoke outlet arranged at the lower end of the shell body. Two upper first-level pipe plates and two lower fist-level pipe plates are arranged inside the shell body. A plurality of pipe holes are arranged on all the pipe plates. A pipe connector is connected at a position of each pipe hole in a welded mode. An upper portion heat exchanging pipe is welded inside a corresponding group of pipe connectors on the two upper first-level pipe plates, a middle portion heat exchanging pipe is welded inside a corresponding group of pipe connectors on the upper portion of two upper first-level pipe plates, and a lower portion heat exchanging pipe is welded inside a corresponding group of pipe connectors on the lower portion of two upper first-level pipe plates. All welding lines of the pipe connectors and the pipe plates and the heat exchanging pipes and the pipe connectors are placed on the outer sides of the pipe plates thereof. An air outlet is arranged on the outer side of one upper first-level pipe plate, the outer side of a lower first-level pipe plate which is on the same side as the upper first-level pipe plate is provided with an air inlet, and the outer sides of a upper first-level pipe plate and a lower first-level pipe plate which are arranged on the other side are provided with connecting channels. The horizontal type durable air preheater has the advantages that pipe utilization rate is high, a pipe is convenient to replace, pipe plate transformation is small, and service life is long.
Description
Technical field
The utility model relates to a kind of air preheater, especially for the air preheater in the boiler back end ductwork.
Background technology
The box type air preheater that relates in the medium small boiler back-end ductwork at present, most of vertical structure that adopts, comprise housing, be located at housing upper end advance mouth, be located at the housing lower end outlet flue, be located at two horizontal tube sheets in the housing, several heat exchanger tubes directly are welded on two tube sheets; And that the pipe of vertical bobbin carriage is met flue gas face end is at first badly damaged, and the interlude pipe can also use the long period, as long as but whole pipe has place's seepage just can't repair, can only all change by whole pipe, and the utilization rate of pipe is lower; After meeting the damage of flue gas facial canal end equal extent, the pipe of whole bobbin carriage all needs to change, and this has just caused very large waste, has also shortened service life; Heat exchanger tube directly is welded on the tube sheet, because need leakproof, tube welding is firm, and the replacing of pipe is comparatively loaded down with trivial details, and workload is large, and the distortion of tube sheet is also larger, and this also can affect the service life of equipment.
The utility model content
The purpose of this utility model is for the prior art above shortcomings, and a kind of horizontal durable air preheater is provided, and it has advantages of, and the pipe utilization rate is high, pipe is changed conveniently, tube plate deformation is little, long service life.
For achieving the above object, horizontal durable air preheater of the present utility model, comprise housing, be located at the mouth that advances of housing upper end, be located at the outlet flue of housing lower end, it is characterized in that in housing, being provided with the two upper level tube sheets parallel with the flow of flue gas direction and two next stage tube sheets, two upper level tube sheets and two next stage tube sheets lay respectively at the both sides in the housing, all tube sheets are equipped with several pores, all weld and be connected with pipe joint at each pore place, be welded with the top heat exchanger tube in one group of pipe joint of correspondence on the two upper level tube sheets, be welded with the middle part heat exchanger tube in one group of pipe joint corresponding to two upper level tube sheet tops, be welded with the bottom heat exchanger tube, all pipe joints and tube sheet in one group of pipe joint corresponding to two upper level tube sheet bottoms, the weld seam of heat exchanger tube and pipe joint all is positioned at the separately outside of tube sheet; The outside at a upper level tube sheet is provided with air outlet slit, is provided with air intlet in the outside of the next stage tube sheet of this upper level tube sheet homonymy, is provided with interface channel in the outside of opposite side upper level tube sheet and next stage tube sheet.
The utility model passes through the heat exchanger tube horizontally set, and flue gas is transversal flow heat exchanger tube outer wall from up to down, and heated air is parallel baffled heat exchanger tube inwall in pipe, reaches the purpose of heat exchange; Every heat exchanger tube all welds with tube sheet mutually by pipe joint, and any pipe can both be changed individually, needn't integral replacing, retube so simple and convenient, tube plate deformation is little; The each several part of every heat exchanger tube substantially all is in equal condition of work in addition, thereby it is all basic identical to have damaged the pipe damaged condition in length range that need change, and weld seam does not contact with Gas phase Smoke all in the outside of tube sheet, the cycle of changing is longer, and the pipe utilization rate is high;
As further improvement of the utility model, all be installed with wear strip at the cigarette face of meeting of several tops of the top heat exchanger tube; The heat exchanger tube wearing and tearing in this district are the most serious, and wear strip can improve the life-span of this district's heat exchanger tube;
As further improvement of the utility model, all welding is provided with transition cover between pipe joint corresponding to heat exchanger tube two ends, every bottom and pore, and the weld seam of transition cover and tube sheet, pipe joint and transition cover all is positioned at the separately outside of lower perforated plate; Can eliminate swelling stress by transition cover, avoid producing the crack, prevent that flue gas and air from going here and there mutually;
As further improvement of the utility model, the middle part heat exchanger tube is stepped on steel for examining, and the bottom heat exchanger tube is stainless steel; Because of the difference of coal variety sulfur content, condition of work is unstable, and the situation of not too serious sour dewfall might appear in the middle part heat exchanger tube, adopts to examine and steps on steel and then have certain acid corrosion-resistant performance; Because the air at room temperature temperature is minimum, air at first contacts with the bottom heat exchanger tube, again for energy-conservation and reduce heat loss, thereby correspondingly reduced again exhaust gas temperature, so this place must more easily produce serious sour dewfall situation, for life-extending, so the bottom heat exchanger tube adopts more acidproof stainless steel;
In sum, the utlity model has that the pipe utilization rate is high, that pipe is changed is convenient, tube plate deformation is little, the advantage of long service life.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the partial enlarged drawing at I place among Fig. 1.
Fig. 4 is the B-B cutaway view among Fig. 3.
Fig. 5 is the partial enlarged drawing at II place among Fig. 1.
Fig. 6 is the partial enlarged drawing at III place among Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Extremely shown in Figure 6 such as Fig. 1, this horizontal durable air preheater, comprise housing 1, that is located at housing upper end advances mouth 2, be located at the outlet flue 3 of housing lower end, in housing 1, be provided with the two upper level tube sheets 4 parallel with the flow of flue gas direction and two next stage tube sheets 5, two upper level tube sheets 4 and two next stage tube sheets 5 lay respectively at the both sides in the housing 1, all tube sheets are equipped with several pores, all weld and be connected with pipe joint 6 at each pore place on two upper level tube sheets 4 and two next stage tube sheets, 5 tops, be welded with top heat exchanger tube 7 in one group of pipe joint 6 of correspondence on the two upper level tube sheets 4, be welded with middle part heat exchanger tube 8 in one group of pipe joint 6 corresponding to two next stage tube sheets, 5 tops, all weld in each pore of two next stage tube sheets, 5 bottoms and be connected with transition cover 10, each transition cover 10 interior all welding is connected with pipe joint 11, be welded with bottom heat exchanger tube 9 in one group of pipe joint 11 corresponding to two next stage tube sheets, 5 bottoms, all pipe joints 6 and upper level tube sheet 4 or next stage tube sheet 5, transition cover 10 and next stage tube sheet 5, pipe joint 11 and transition cover 10, heat exchanger tube 7,8,9 all are positioned at the outside of upper level tube sheet 4 separately or next stage tube sheet 5 with pipe joint 6 or 11 weld seam, top heat exchanger tube 7 is carbon steel, all is installed with the wear strip 12 of circular arc at the upper side wall of five top heat exchanger tubes 7 of the top; Middle part heat exchanger tube 8 is stepped on steel for examining, and bottom heat exchanger tube 9 is stainless steel; Be provided with air outlet slit 13 in the outside of a upper level tube sheet 4, be provided with air intlet 14 in the outside of the next stage tube sheet 5 of these upper level tube sheet 4 homonymies, be provided with interface channel 15 in the outside of opposite side upper level tube sheet 4 and next stage tube sheet 5.
The utility model passes through heat exchanger tube 7,8,9 horizontally sets, and flue gas is transversal flow heat exchanger tube outer wall from up to down, and heated air is parallel baffled heat exchanger tube inwall in pipe, reaches the purpose of heat exchange; Every heat exchanger tube 7,8,9 all welds with tube sheet separately mutually by pipe joint 6 or 11, transition cover 10, and any pipe can both be changed individually, needn't integral replacing, retube so simple and convenient, tube plate deformation is little; Every heat exchanger tube 7,8,9 each several part substantially all are in equal condition of work in addition, thereby it is all basic identical to have damaged the pipe damaged condition in length range that need change, and weld seam does not contact with Gas phase Smoke all in the outside of tube sheet 4 or 5, the cycle of changing is longer, and the pipe utilization rate is high; Several tops heat exchanger tube 7 wearing and tearing of the top are the most serious, and wear strip 12 can improve the life-span of this district's heat exchanger tube; Transition cover 10 can be eliminated swelling stress, avoids producing the crack, prevents that flue gas and air from going here and there mutually; Middle part heat exchanger tube 8 is stepped on steel for examining, and bottom heat exchanger tube 9 is stainless steel, can satisfy respectively anticorrosion needs separately, further improves service life.
Claims (4)
1. horizontal durable air preheater, comprise housing, be located at the mouth that advances of housing upper end, be located at the outlet flue of housing lower end, it is characterized in that in housing, being provided with the two upper level tube sheets parallel with the flow of flue gas direction and two next stage tube sheets, two upper level tube sheets and two next stage tube sheets lay respectively at the both sides in the housing, all tube sheets are equipped with several pores, all weld and be connected with pipe joint at each pore place, be welded with the top heat exchanger tube in one group of pipe joint of correspondence on the two upper level tube sheets, be welded with the middle part heat exchanger tube in one group of pipe joint corresponding to two upper level tube sheet tops, be welded with the bottom heat exchanger tube, all pipe joints and tube sheet in one group of pipe joint corresponding to two upper level tube sheet bottoms, the weld seam of heat exchanger tube and pipe joint all is positioned at the separately outside of tube sheet; The outside at a upper level tube sheet is provided with air outlet slit, is provided with air intlet in the outside of the next stage tube sheet of this upper level tube sheet homonymy, is provided with interface channel in the outside of opposite side upper level tube sheet and next stage tube sheet.
2. horizontal durable air preheater as claimed in claim 1 is characterized in that all being installed with wear strip at the upper side wall of several tops of the top heat exchanger tube.
3. horizontal durable air preheater as claimed in claim 1 or 2, it is characterized in that between pipe joint corresponding to heat exchanger tube two ends, every bottom and pore all welding is provided with transition cover, the weld seam of transition cover and tube sheet, pipe joint and transition cover all is positioned at the separately outside of lower perforated plate.
4. horizontal durable air preheater as claimed in claim 1 or 2 is characterized in that the middle part heat exchanger tube steps on steel for examining, and the bottom heat exchanger tube is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203154421U CN202692114U (en) | 2012-07-03 | 2012-07-03 | Horizontal type durable air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203154421U CN202692114U (en) | 2012-07-03 | 2012-07-03 | Horizontal type durable air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202692114U true CN202692114U (en) | 2013-01-23 |
Family
ID=47547726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203154421U Expired - Lifetime CN202692114U (en) | 2012-07-03 | 2012-07-03 | Horizontal type durable air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202692114U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534450A (en) * | 2014-08-28 | 2015-04-22 | 国电龙源电力技术工程有限责任公司 | Smoke waste heat comprehensive utilization device for thermal power plant |
| CN104949150A (en) * | 2015-07-03 | 2015-09-30 | 哈尔滨哈锅锅炉工程技术有限公司 | Connecting structure of boiler tubular air preheater channel and connecting box |
-
2012
- 2012-07-03 CN CN2012203154421U patent/CN202692114U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534450A (en) * | 2014-08-28 | 2015-04-22 | 国电龙源电力技术工程有限责任公司 | Smoke waste heat comprehensive utilization device for thermal power plant |
| CN104534450B (en) * | 2014-08-28 | 2016-10-26 | 国电龙源电力技术工程有限责任公司 | A kind of coal steam-electric plant smoke comprehensive waste-heat utilizing device |
| CN104949150A (en) * | 2015-07-03 | 2015-09-30 | 哈尔滨哈锅锅炉工程技术有限公司 | Connecting structure of boiler tubular air preheater channel and connecting box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
|
| CX01 | Expiry of patent term |