CN102353043B - Adjustable external heat exchanger for circulating fluidized bed boiler - Google Patents
Adjustable external heat exchanger for circulating fluidized bed boiler Download PDFInfo
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- CN102353043B CN102353043B CN 201110242512 CN201110242512A CN102353043B CN 102353043 B CN102353043 B CN 102353043B CN 201110242512 CN201110242512 CN 201110242512 CN 201110242512 A CN201110242512 A CN 201110242512A CN 102353043 B CN102353043 B CN 102353043B
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- returning charge
- chamber
- partition wall
- flashboard
- heat exchanger
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Abstract
The invention relates to an adjustable external heat exchanger for a circulating fluidized bed boiler. The adjustable external heat exchanger comprises a material ash cycling inlet, a burden distribution baffle wall, a feeding chamber, a material cycling air compartment, a heating surface, a material cycling chamber, a feed back chamber, a material cycling baffle wall, a material ash cycling outlet, a material cycling air distribution plate and a distribution baffle wall, wherein the central section of the material cycling baffle wall is provided with a flashboard which is positioned inside an intermediate chamber of the material cycling chamber and is tightly against the material cycling baffle wall; a sealing device is disposed on the flashboard and outside the intermediate chamber of the material cycling chamber; an actuating mechanism for adjusting the flashboard is arranged on the sealing device; and the flashboard is connected with the actuating mechanism through a screw thread connecting rod. The invention is characterized in that the actuating mechanism is used to adjust the height of the regulating valve flashboard up and down so as to realize the purpose of controlling the flow of hot ash; the invention has a simple, compact and reasonable structure; the internal heating surface of the external heat exchanger is uniformly heated so as to avoid overburn and tube explosion; in addition, by adjusting the height of the valve flashboard, the flow of hot ash flowing through the heating surface is controlled so as to realize the purpose of adjusting the caloric receptivity of the heating surface as well as the hearth bed temperature.
Description
Technical field
The present invention relates to a kind of adjustable external heat exchanger, specifically be used for CFBB, its effect is the height by the adjusting flashboard, and the flow of heating surface heat ash is flow through in control, realizes the purpose of adjusting heating surface caloric receptivity and burner hearth bed temperature.
Background technology
At present, domestic most External Heat Exchanger in CFB Boiler do not arrange hot grey flow control valve, can only regulate the ash amount that enters burner hearth by the accident dust leg.Because hot grey temperature up to 900 ℃, not only wastes energy, and can bring potential safety hazard; As heat recovery cooling devices such as device for cooling ash are set, not only can increase initial cost, and can cause the complexity of device systems.Some is introduced external product external heat exchanger and is provided with control valve, and most employing hydraulic systems etc. drive the cone valve structure, and mechanical breakdowns such as not only system complex, and cone valve easy deformation generation jam cause interruption of service to take place frequently.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, thereby provide a kind of recirculating fluidized bed adjustable external heat exchanger, not only its inner heating surface is heated more even, and can be by regulating the height of flashboard, the flow of heating surface heat ash is flow through in control, realizes regulating the purpose of heating surface caloric receptivity and burner hearth bed temperature.
According to technical scheme provided by the invention, the adjustable external heat exchanger of CFBB comprises the import of returning charge ash, cloth partition wall, feed space, returning charge air compartment, heating surface, returning charge chamber, material return chamber, returning charge partition wall, the outlet of returning charge ash, returning charge air distribution plate and distributes partition wall, described cloth partition wall back upper place is provided with the import of returning charge ash, described cloth partition wall front lower place is provided with returning charge ash outlet, by cloth partition wall and returning charge partition wall with its inside from after be divided into feed space, returning charge chamber and material return chamber forward successively; Distribute partition wall that returning charge chamber left and right directions is divided into three chambers, the indoor layout heating surface of both sides, middle chamber is empty chamber; Feature is: the bottom in feed space and returning charge chamber is provided with the returning charge air distribution plate, and its underpart connects the returning charge air compartment; Described returning charge partition wall middle part is provided with flashboard, flashboard is positioned at the medial compartment of returning charge chamber, and near the returning charge partition wall, on flashboard, the outside of returning charge chamber medial compartment is provided with sealing device, be the executing agency that regulates flashboard on sealing device, flashboard links to each other with executing agency by threaded rod; Can realize the purpose of the hot grey flow of control by the height of executing agency's up-down adjustment control valve flashboard;
As a further improvement on the present invention, gap is all left at medial compartment place, returning charge chamber in described cloth partition wall lower end and returning charge partition wall upper end.
As a further improvement on the present invention, returning charge blast cap and accident dust leg are housed above the described returning charge air distribution plate;
As a further improvement on the present invention, described returning charge air compartment is provided with blast pipe and dust leg.
As a further improvement on the present invention, top, three Room communicates about described returning charge chamber, distributes partition wall it not to be separated fully.
Compared with the prior art the present invention has the following advantages:
The present invention is simple in structure, compact, reasonable; The heating surface of external heat exchanger inside is heated evenly, and avoids the burning booster; By the height of control valve flashboard, the flow of heating surface heat ash is flow through in control, realizes regulating the purpose of heating surface caloric receptivity and burner hearth bed temperature.
Description of drawings
Fig. 1 is structural front view of the present invention.
Fig. 2 is the cross-sectional view of the adjustable external heat exchanger of the present invention.
Fig. 3 is that the A-A of Fig. 1 is to view.
Fig. 4 is that the B-B of Fig. 1 is to view.
The specific embodiment
Below in conjunction with accompanying drawing of the present invention its enforcement is further described:
The present invention mainly is made up of the import 1 of returning charge ash, cloth partition wall 2, feed space 3, returning charge blast cap 4, returning charge air compartment 5, heating surface 6, returning charge chamber 7, control valve executing agency 8, flashboard 9, material return chamber 10, returning charge partition wall 11, returning charge ash outlet 12, returning charge air distribution plate 13, distribution partition wall 14, partition wall gap 15, sealing device 16 and threaded rod 17 etc.
It is cuboid that the present invention adopts monnolithic case, and described cloth partition wall 2 back upper places are provided with the import 1 of returning charge ash, and described cloth partition wall 2 front lower places are provided with returning charge ash outlet 12; By cloth partition wall 2 and returning charge partition wall 11, with its inside from after be divided into feed space 3, returning charge chamber 7 and material return chamber 10 forward successively; Distribute partition wall 14 again returning charge chamber 7 left and right directions to be divided into three chambers, top, about 7 three Room, returning charge chamber communicates, and distributes partition wall 14 it not to be separated fully, the indoor layout heating surface 6 of both sides, and middle chamber is empty chamber.Bottom in feed space 3 and returning charge chamber 7 is provided with returning charge air distribution plate 13, and returning charge blast cap 4 and accident dust leg are housed above; Its underpart connects returning charge air compartment 5, and returning charge air compartment 5 is provided with blast pipe and dust leg.
Described returning charge partition wall 11 middle parts are provided with flashboard 9, flashboard 9 is positioned at the medial compartment of returning charge chamber 7, and near returning charge partition wall 11, on flashboard 9, the outside of returning charge chamber 7 medial compartments is provided with sealing device 16, be the executing agency 8 that regulates flashboard 9 on sealing device 16, flashboard 9 links to each other with executing agency 8 by threaded rod 17; Can realize the purpose of the hot grey flow of control by the height of executing agency's 8 up-down adjustment flashboards 9; Executing agency 8 adopts motor among the present invention.Sealing device 16 adopts case.
7 medial compartment places all leave gap 15 in the returning charge chamber for described cloth partition wall 2 lower ends and returning charge partition wall 11 upper ends;
Operation principle of the present invention and the course of work:
The heat ash that separator separates enters feed space 3 from the import 1 of returning charge ash, behind cloth partition wall 2, evenly enters returning charge chamber 7, again through entering material return chamber 10 behind the returning charge partition wall 11, leaves heat exchanger and enters burner hearth finally by crossing returning charge ash outlet 12.In this process, returning charge wind enters returning charge blast cap 4 from returning charge air compartment 5, and is constantly carrying hot ash to flow forward.
When upwards opening flashboard 9 by executing agency 8, because 7 medial compartment places all leave gap 15 in the returning charge chamber for cloth partition wall 2 lower ends and returning charge partition wall 11 upper ends, resistance ratios arranges that the indoor resistance in the both sides of heating surface 6 is little herein, therefore hot grey flow-rate ratio two side rooms are big, thereby reach the purpose that reduces the heating surface caloric receptivity and improve fire box temperature.
On the contrary, when closing to lower flashboard 9, all just can enter material return chamber 10 behind two side rooms of the grey layout heating surface 6 of all need flowing through of the heat of feed space 3; Therefore the heating surface caloric receptivity is big, and the temperature that enters burner hearth is lower.For preventing medial compartment generation slagging scorification or the coking of the chamber of returning charge at this moment 7, with returning charge chamber 7 be arranged to that the top communicates about three Room, namely distribute partition wall 14 it not to be separated fully, so that the hot ash of medial compartment can enter the indoor of the left and right sides smoothly, realize flowing normally.On the heat exchanger manhole and measured hole etc. can be set as required.
Claims (5)
1. the adjustable external heat exchanger of CFBB, comprise the import (1) of returning charge ash, cloth partition wall (2), feed space (3), returning charge air compartment (5), heating surface (6), returning charge chamber (7), material return chamber (10), returning charge partition wall (11), returning charge ash outlet (12), returning charge air distribution plate (13) and distribution partition wall (14), described cloth partition wall (2) back upper place is provided with the import (1) of returning charge ash, described cloth partition wall (2) front lower place is provided with returning charge ash outlet (12), by cloth partition wall (2) and returning charge partition wall (11) with its inside from after be divided into feed space (3) forward successively, returning charge chamber (7) and material return chamber (10); Distribute partition wall (14) that returning charge chamber (7) left and right directions is divided into three chambers, the indoor layout heating surface (6) of both sides, middle chamber is empty chamber; It is characterized in that: the bottom in feed space (3) and returning charge chamber (7) is provided with returning charge air distribution plate (13), and its underpart connects returning charge air compartment (5); Described returning charge partition wall (11) middle part is provided with flashboard (9), flashboard (9) is positioned at the medial compartment of returning charge chamber (7), and near returning charge partition wall (11), on flashboard (9), the outside of returning charge chamber (7) medial compartment is provided with sealing device (16), be the executing agency (8) that regulates flashboard (9) on sealing device (16), flashboard (9) links to each other with executing agency (8) by threaded rod (17); Can pass through the height of executing agency (8) up-down adjustment flashboard (9).
2. the adjustable external heat exchanger of CFBB as claimed in claim 1 all leaves gap (15) at returning charge chamber (7) medial compartment place on described cloth partition wall (2) lower end and the returning charge partition wall (11).
3. the adjustable external heat exchanger of CFBB as claimed in claim 1 is equipped with returning charge blast cap (4) and accident dust leg above the described returning charge air distribution plate (13).
4. the adjustable external heat exchanger of CFBB as claimed in claim 1, described returning charge air compartment (5) is provided with blast pipe and dust leg.
5. the adjustable external heat exchanger of CFBB as claimed in claim 1, the top, three chambers of described returning charge chamber (7) communicates, and distributes partition wall (14) it not to be separated fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110242512 CN102353043B (en) | 2011-08-23 | 2011-08-23 | Adjustable external heat exchanger for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110242512 CN102353043B (en) | 2011-08-23 | 2011-08-23 | Adjustable external heat exchanger for circulating fluidized bed boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102353043A CN102353043A (en) | 2012-02-15 |
| CN102353043B true CN102353043B (en) | 2013-07-03 |
Family
ID=45576666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110242512 Expired - Fee Related CN102353043B (en) | 2011-08-23 | 2011-08-23 | Adjustable external heat exchanger for circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN102353043B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011565B (en) * | 2012-12-27 | 2015-04-22 | 海南中航特玻材料有限公司 | Tin bath flow gate baking furnace |
| KR101942247B1 (en) * | 2016-09-27 | 2019-01-28 | 한국에너지기술연구원 | Apparatus for controlling solid flow in circulating fluidized bed boiler |
| CN108443871B (en) * | 2018-05-17 | 2023-07-25 | 华北电力科学研究院有限责任公司 | Method and device for controlling opening of external bed ash control valve |
| CN111895390B (en) * | 2020-07-17 | 2022-05-31 | 东方电气集团东方锅炉股份有限公司 | Air distribution system of external heat exchanger of circulating fluidized bed boiler |
| CN112377895B (en) * | 2020-11-10 | 2021-11-05 | 浙江大学 | Adjustable double-bed anti-corrosion external high-temperature superheater ash return device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184671A (en) * | 1987-12-21 | 1993-02-09 | Foster Wheeler Energy Corporation | Fluidized bed heat exchanger and method of operating same |
| CN2586122Y (en) * | 2002-11-19 | 2003-11-12 | 北京中科通用能源环保有限责任公司 | Built-in fluid bed heat exchanger |
| CN1932379A (en) * | 2005-09-13 | 2007-03-21 | 中国科学院工程热物理研究所 | Pneumatic controlling ash-in external heat exchanger |
| 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 |
| CN202253607U (en) * | 2011-08-23 | 2012-05-30 | 无锡太湖锅炉有限公司 | Adjustable external heat exchanger of circulating fluidized bed boiler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0275811A (en) * | 1988-09-09 | 1990-03-15 | Mitsubishi Heavy Ind Ltd | Fluidized bed device |
-
2011
- 2011-08-23 CN CN 201110242512 patent/CN102353043B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184671A (en) * | 1987-12-21 | 1993-02-09 | Foster Wheeler Energy Corporation | Fluidized bed heat exchanger and method of operating same |
| CN2586122Y (en) * | 2002-11-19 | 2003-11-12 | 北京中科通用能源环保有限责任公司 | Built-in fluid bed heat exchanger |
| CN1932379A (en) * | 2005-09-13 | 2007-03-21 | 中国科学院工程热物理研究所 | Pneumatic controlling ash-in external heat exchanger |
| 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 |
| CN202253607U (en) * | 2011-08-23 | 2012-05-30 | 无锡太湖锅炉有限公司 | Adjustable external heat exchanger of circulating fluidized bed boiler |
Non-Patent Citations (1)
| Title |
|---|
| JP平2-75811A 1990.03.15 |
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| CN102353043A (en) | 2012-02-15 |
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