CN103672875A - External heat exchanger - Google Patents
External heat exchanger Download PDFInfo
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- CN103672875A CN103672875A CN201310693395.3A CN201310693395A CN103672875A CN 103672875 A CN103672875 A CN 103672875A CN 201310693395 A CN201310693395 A CN 201310693395A CN 103672875 A CN103672875 A CN 103672875A
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- transfer surface
- surface tube
- tube bank
- heat exchanger
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Abstract
The invention discloses an external heat exchanger which comprises a casing, a heat exchange surface tube bundle arranged in a casing penetrating manner, as well as a first wind chamber and a second wind chamber which are arranged at the bottom of the casing, and hoods are arranged on the casing corresponding to the two wind chambers. The external heat exchanger is characterized in that the heat exchange surface tube bundle is fixed in an inner cavity of the casing in a bending and suspending manner, and the total flow direction of solid particles is parallel to the axis of the heat exchange surface tube bundle, so that the heat exchange surface tube bundle is prevented from being perpendicularly impacted by the solid flow particles, abrasion of the heat exchange surface tube bundle is reduced, abrasion and tube bursting of a heating surface are prevented, and reliability of the whole external heat exchanger is guaranteed.
Description
Technical field
The present invention relates to a kind of heat exchanger, be specifically related to a kind of external heat exchanger for CFBB.
Background technology
Recirculating fluidized bed (CFB) combustion technology is a kind of novel clean coal combustion technology, and its main feature is that fuel is the burning of fluidisation state in burner hearth.CFBB is to large scale development, and boiler needs more heat exchange area, but the size of boiler is not to increase and linear increasing with boiler capacity, arranges that heating surface seems very difficult in main circulation loop.Therefore, strange (Lurgi) company in Shandong proposes the concept of external heat exchanger the earliest.Yet, external heat exchanger is because inner space is narrow and small, and heat-transfer surface tube bank is vertical with the flow direction of solid flow particle, and this structure makes the impact wear of solid flow particle heat exchanging facial canal bundle very large, very easily cause heating surface wear booster, affect the reliability of whole external heat exchanger.
In addition, external heat exchanger relies on fluidized wind fluidisation material, in boiler startup/stoppage in transit process, during input/stoppage in transit external heat exchanger, if misoperation, particularly to fluidized wind switch, it is improper that air force is controlled, easily cause that the ash refluence in external heat exchanger enters air compartment, affects external heat exchanger operation.
Summary of the invention
For above-mentioned deficiency, the invention provides a kind of heat-transfer surface tube bank wearing and tearing little, and the ash in heat exchanger can not flow backwards and enters the external heat exchanger of air compartment.
The present invention realizes by such technical scheme: a kind of external heat exchanger, comprise shell, through the heat-transfer surface tube bank of shell setting, be arranged at the first air compartment and second air compartment of outer casing bottom, on shell corresponding to these two air compartments, be provided with blast cap, the crooked suspention of described heat-transfer surface tube bank is fixed in the inner chamber of shell, and the overall flow direction of solid particle is parallel with the axis of heat-transfer surface tube bank, thereby greatly reduce the wearing and tearing of heat-transfer surface tube bank.
The inside of described shell arranges a partition wall, play the fixedly guide effect of flow particles, this partition wall is separated into the first space and second space by the inner chamber of shell, described heat-transfer surface tube bank suspention is fixed in second space, has further guaranteed that the axis that fixedly the overall flow direction of flow particles is restrained with heat-transfer surface is parallel.
A part for described heat-transfer surface tube bank is fixed in second space by two hanging pipes, the bottom of these two hanging pipes is two sling points, wherein, any one point of suspension is fixedly time, another is sliding point, so that when heat exchanger is worked, control or calculate the distortion trend of heat-transfer surface tube bank, easily deformable metering, for maintenance adjustment is provided convenience.
This fixing part of described heat-transfer surface tube bank suspention, is provided with warp architecture, and the distortion that this warp architecture can absorption heat-exchange facial canal bundle one side, comprises the expansion of self, makes heat-transfer surface tube bank better in the ductility of length direction.
The level height of described partition wall is more than or equal to the level height of this fixing a part of heat-transfer surface tube bank of suspention, the one, be convenient to fixing flow particles to play better guide effect, the 2nd, can further make fixedly flow particles keep certain mobile height, further guarantee that overall flow direction is parallel with the axis of heat-transfer surface tube bank.
Further, the upper end of described heat-transfer surface tube bank is stretched out shell and is communicated with media outlet header, and lower end is stretched out shell and communicated with medium inlet header, is convenient to the inflow of medium.
The side of described shell is provided with maintenance step, makes to retain enough space for maintenances between shell and heat-transfer surface tube bank; Or, between shell and heat-transfer surface tube bank, maintenance step is not set, only need to make to leave enough space for maintenances between partition wall and heat-transfer surface tube bank, operating personnel also can be from heat exchanging facial canal Shu Jinhang inspection and maintenance between the maintenance between partition wall and heat-transfer surface tube bank like this.
Further, the percent opening of described blast cap is 10%～30%, compares present technology, has improved percent opening, makes the better fluidisation of fixedly flow particles in this region, guarantees that the medium temperature of heat-transfer surface tube bank heating surface is even.
The particle outlet place grey-way width of described the first space and second space is more than or equal to the width of heat-transfer surface tube bank both sides, further to guarantee that heat-transfer surface tube bank heating surface obtains conducting heat more uniformly.
For the ease of heat-transfer surface is restrained through shell, this heat-transfer surface tube bank adopts Y-piece.
Owing to having adopted said structure, beneficial effect of the present invention is as follows:
(1) part suspention of heat-transfer surface tube bank is fixing in the enclosure, and make this part of axis parallel with the overall flow direction of fixing flow particles, prevent the fixedly vertical impact of flow particles heat exchanging facial canal bundle, thereby reduce the wearing and tearing of heat-transfer surface tube bank, prevent heating surface wear booster, guarantee the reliability of whole external heat exchanger.
(2) in the inside of shell, one partition wall is set, play to fixing flow grain flow to guide effect, further guaranteed that fixedly the overall flow direction of flow particles is with the axis of heat-transfer surface tube bank parallel, reduce the wearing and tearing that heat-transfer surface is restrained.
(3) adopt two point of suspension that the heat-transfer surface parallel with fixing flow particles overall flow direction restrained to this partial fixing in the second space being separated by partition wall, this one fixes the structure of an activity, can effectively control the distortion trend of heat-transfer surface tube bank, easily deformable metering, facilitates the maintenance in later stage.
(4) in heat-transfer surface tube bank, warp architecture is set, the effectively distortion of absorption heat-exchange facial canal bundle one side and self expansion, makes heat-transfer surface tube bank better in the ductility of length direction.
(5) adopt the more blast cap of large opening rate, make the better fluidisation of fixedly flow particles in this region, guarantee that the medium temperature of heat-transfer surface tube bank heating surface is even.
(6) part for heat-transfer surface tube bank is fixed in second space by two hanging pipes, thereby can hang the caliber of pipe and the flow of heat-transfer surface tube bank by adjustment, reduces the wall temperature of hanging pipe, improves the bearing capacity of hanging pipe.
Accompanying drawing explanation
Fig. 1 is the structural representation of this case external heat exchanger.
Fig. 2 is that the A-A of Fig. 1 is to cutaway view.
Fig. 3 is the schematic diagram of Y type heat-transfer surface tube bank.
The specific embodiment
In order to be more expressly understood object of the present invention, technical scheme and beneficial effect, below in conjunction with accompanying drawing, the present invention is described further, but protection scope of the present invention is not limited in following examples.
As shown in Figure 1 to Figure 3, a kind of external heat exchanger, the heat-transfer surface tube bank 2 that comprise shell 1, arranges through shell 1, the first air compartment 3 and the second air compartment 4 that is arranged at shell 1 bottom, on shell 1 corresponding to these two air compartments, be provided with blast cap 5, the crooked suspention of described heat-transfer surface tube bank 2 is fixed in the inner chamber of shell 1, and the overall flow direction of solid particle is parallel with the axis of heat-transfer surface tube bank 2, as shown in the arrow in Fig. 1; The inside of shell 1 arranges a partition wall 6, and this partition wall 6 is separated into the first space 7 and second space 8 by the inner chamber of shell 1, and described heat-transfer surface tube bank 2 suspentions are fixed in second space 8; A part for described heat-transfer surface tube bank 2 is fixed in second space 8 by two hanging pipes 9, and the bottoms of these two hanging pipes 9 are two sling points 10,11, and wherein, any one point of suspension is fixedly time, and another is sliding point, and vice versa; This fixing part of described heat-transfer surface tube bank 2 suspention, is provided with warp architecture 12; The level height of described partition wall 6 is more than or equal to the level height of this fixing a part of heat-transfer surface tube bank 2 of suspention; The upper end of heat-transfer surface tube bank 2 is stretched out shell 1 and is communicated with media outlet header 13, and lower end is stretched out shell 1 and communicated with medium inlet header 14; The side of described shell 1 is provided with maintenance step 15, make to retain enough space for maintenances between shell 1 and heat-transfer surface tube bank 2, this space for maintenance is about 500mm, and repair and maintenance is carried out to it in surrounding and bottom that operating personnel can enter into heat-transfer surface tube bank 2 from this space for maintenance; The percent opening of blast cap 5 is 10%～30%; The particle outlet place grey-way width of the first space 7 and second space 8 is more than or equal to the width that heat-transfer surface is restrained 2 both sides; Heat-transfer surface tube bank 2 adopts Y-piece.
When external heat exchanger puts into operation, steam medium or other media are introduced from medium inlet header 14, and the heat-transfer surface tube bank 2 of flowing through, flow to media outlet header 13, first open the fluidized wind of the second air compartment 4, then open the fluidized wind of the first air compartment 3; When external heat exchanger is out of service, first close the fluidized wind of the first air compartment 3, close again the fluidized wind of the second air compartment 4, so not only can prevent that the ash in external heat exchanger from blowing back into air compartment, partition wall 6 has also played good guide effect, it is 2 parallel that the overall flow direction that has further guaranteed fixing flow particles and heat-transfer surface are restrained, and prevents that heat-transfer surface tube bank 2 wearing and tearing are larger, enters the reliability of high whole heat exchanger.
Claims (10)
1. an external heat exchanger, comprise shell, through the heat-transfer surface tube bank of shell setting, be arranged at the first air compartment and second air compartment of outer casing bottom, on shell corresponding to these two air compartments, be provided with blast cap, it is characterized in that: the crooked suspention of described heat-transfer surface tube bank is fixed in the inner chamber of shell, and the overall flow direction of solid particle is parallel with the axis of heat-transfer surface tube bank.
2. external heat exchanger as claimed in claim 1, is characterized in that: the inside of described shell arranges a partition wall, and this partition wall is separated into the first space and second space by the inner chamber of shell, and described heat-transfer surface tube bank suspention is fixed in second space.
3. external heat exchanger as claimed in claim 2, it is characterized in that: a part for described heat-transfer surface tube bank is fixed in second space by two hanging pipes, and the bottom of these two hanging pipes is two sling points, wherein, any one point of suspension is fixedly time, and another is sliding point.
4. external heat exchanger as claimed in claim 2 or claim 3, is characterized in that: this fixing part of described heat-transfer surface tube bank suspention, is provided with warp architecture.
5. external heat exchanger as claimed in claim 2 or claim 3, is characterized in that: the level height of described partition wall is more than or equal to the level height of this fixing a part of heat-transfer surface tube bank of suspention.
6. external heat exchanger as claimed in claim 4, is characterized in that: the upper end of described heat-transfer surface tube bank is stretched out shell and communicated with media outlet header, and lower end is stretched out shell and communicated with medium inlet header.
7. external heat exchanger as claimed in claim 4, is characterized in that: the side of described shell is provided with maintenance step, makes to retain enough space for maintenances between shell and heat-transfer surface tube bank.
8. external heat exchanger as claimed in claim 4, is characterized in that: the percent opening of described blast cap is 10%～30%.
9. the external heat exchanger as described in claim 1,2 or 3, is characterized in that: the particle outlet place grey-way width of described the first space and second space is more than or equal to the width of heat-transfer surface tube bank both sides.
10. external heat exchanger as claimed in claim 9, is characterized in that: described heat-transfer surface tube bank is Y-piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310693395.3A CN103672875A (en) | 2013-12-17 | 2013-12-17 | External heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310693395.3A CN103672875A (en) | 2013-12-17 | 2013-12-17 | External heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN103672875A true CN103672875A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310693395.3A Pending CN103672875A (en) | 2013-12-17 | 2013-12-17 | External heat exchanger |
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| CN (1) | CN103672875A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526583A (en) * | 2016-01-29 | 2016-04-27 | 东方电气集团东方锅炉股份有限公司 | Even air distributing system for external heat exchanger of supercritical circulating fluidized bed boiler |
| CN105674253A (en) * | 2014-11-18 | 2016-06-15 | 国家电网公司 | Cyclone fluidizing system for fluidized bed boiler external bed |
| CN111426218A (en) * | 2020-04-13 | 2020-07-17 | 东方电气集团东方锅炉股份有限公司 | Supercritical carbon dioxide and solid particle heat exchanger |
| CN112709984A (en) * | 2020-12-30 | 2021-04-27 | 哈尔滨锅炉厂有限责任公司 | Novel external heat exchanger for CFB boiler |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274969A (en) * | 1999-03-23 | 2000-10-06 | Kubota Corp | Exterior heat exchanger for circulation fluid layer furnace |
| CN101629717A (en) * | 2009-05-26 | 2010-01-20 | 西安热工研究院有限公司 | Current-equalizing pneumatic heat exchanging bed |
| CN101696798A (en) * | 2009-05-18 | 2010-04-21 | 西安热工研究院有限公司 | Compact circulating fluidized bed boiler with special division wall |
| CN201521951U (en) * | 2009-09-29 | 2010-07-07 | 哈尔滨锅炉厂有限责任公司 | External mixed flowing heat exchange device for circulating fluidized bed boiler |
| CN102840577A (en) * | 2011-06-23 | 2012-12-26 | 中国科学院工程热物理研究所 | Circulation fluidized bed boiler having compact type external dual fluidized bed heat exchanger |
| CN103438441A (en) * | 2013-08-13 | 2013-12-11 | 东方电气集团东方锅炉股份有限公司 | Air distributing system for effectively controlling material backflow of external heat exchanger |
| CN203656914U (en) * | 2013-12-17 | 2014-06-18 | 东方电气集团东方锅炉股份有限公司 | External heat exchanger |
-
2013
- 2013-12-17 CN CN201310693395.3A patent/CN103672875A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274969A (en) * | 1999-03-23 | 2000-10-06 | Kubota Corp | Exterior heat exchanger for circulation fluid layer furnace |
| CN101696798A (en) * | 2009-05-18 | 2010-04-21 | 西安热工研究院有限公司 | Compact circulating fluidized bed boiler with special division wall |
| CN101629717A (en) * | 2009-05-26 | 2010-01-20 | 西安热工研究院有限公司 | Current-equalizing pneumatic heat exchanging bed |
| CN201521951U (en) * | 2009-09-29 | 2010-07-07 | 哈尔滨锅炉厂有限责任公司 | External mixed flowing heat exchange device for circulating fluidized bed boiler |
| CN102840577A (en) * | 2011-06-23 | 2012-12-26 | 中国科学院工程热物理研究所 | Circulation fluidized bed boiler having compact type external dual fluidized bed heat exchanger |
| CN103438441A (en) * | 2013-08-13 | 2013-12-11 | 东方电气集团东方锅炉股份有限公司 | Air distributing system for effectively controlling material backflow of external heat exchanger |
| CN203656914U (en) * | 2013-12-17 | 2014-06-18 | 东方电气集团东方锅炉股份有限公司 | External heat exchanger |
Non-Patent Citations (1)
| Title |
|---|
| 杨建球等: "《大型循环流化床锅炉运行优化及改进》", 31 January 2010, 中国电力出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674253A (en) * | 2014-11-18 | 2016-06-15 | 国家电网公司 | Cyclone fluidizing system for fluidized bed boiler external bed |
| CN105526583A (en) * | 2016-01-29 | 2016-04-27 | 东方电气集团东方锅炉股份有限公司 | Even air distributing system for external heat exchanger of supercritical circulating fluidized bed boiler |
| CN105526583B (en) * | 2016-01-29 | 2018-02-06 | 东方电气集团东方锅炉股份有限公司 | A kind of even distributing wind system of supercritical circulating fluidized bed boiler external heat exchanger |
| CN111426218A (en) * | 2020-04-13 | 2020-07-17 | 东方电气集团东方锅炉股份有限公司 | Supercritical carbon dioxide and solid particle heat exchanger |
| CN112709984A (en) * | 2020-12-30 | 2021-04-27 | 哈尔滨锅炉厂有限责任公司 | Novel external heat exchanger for CFB boiler |
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Application publication date: 20140326 |