CN107676777B - Device for preventing tearing of superheater tube of side wall wrapping at tail part of circulating fluidized bed boiler - Google Patents
Device for preventing tearing of superheater tube of side wall wrapping at tail part of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN107676777B CN107676777B CN201711147469.8A CN201711147469A CN107676777B CN 107676777 B CN107676777 B CN 107676777B CN 201711147469 A CN201711147469 A CN 201711147469A CN 107676777 B CN107676777 B CN 107676777B
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- plates
- comb
- steel
- fixing flat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
The invention relates to a device for preventing a superheater tube of a side-wrapping wall of a circulating fluidized bed boiler from tearing, which aims to solve the problems that in the prior art, the side-wrapping wall of the circulating fluidized bed boiler and an upper header have temperature difference and different expansion amounts, the joint of a tube and the flat steel has stress, the tube has cracks and leaks, the furnace of a power plant is shut down and the safe and economic operation of the power plant is affected.
Description
Technical Field
The invention relates to a device for preventing a superheater tube of a fluidized bed boiler from being torn, in particular to a device for preventing a superheater tube of a side wall of a tail part of a circulating fluidized bed boiler from being torn.
Background
The tail wall-wrapping superheater of the circulating fluidized bed boiler heats the boiler barrel by utilizing heat of high-temperature flue gas to generate saturated steam, so that the inlet flue gas temperature of the high-temperature superheater is reduced, and the inlet steam temperature of the low-temperature superheater is improved. When the boiler operates, the side-wall header is arranged outside the flue gas and only the steam with the same temperature is fed inside the side-wall header due to the fact that the steam is fed inside the side-wall header, the temperature difference exists between the side-wall header and the flue gas, the expansion amount is different, after the operation time is long, the pipe is cracked due to the fact that the joint of the pipe and the flat steel is stressed, leakage occurs, the power plant is stopped, the safety and economical operation of the power plant is affected, and the economic benefit is reduced.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the side wall of the circulating fluidized bed boiler and an upper header have temperature difference and different expansion amounts, the joint of a pipe and flat steel has stress, the pipe has cracks and leakage, the power plant is shut down, and the safe and economic operation of the power plant is affected, and further provides a device for preventing the superheater pipe of the side wall of the tail part of the circulating fluidized bed boiler from tearing.
The invention adopts the technical proposal for solving the problems that:
the two-plate heat exchanger comprises two groups of steel plate fixing flat steels, four groups of second comb plates, four steel plates, a plurality of expansion joints, a plurality of sealing filling blocks, a plurality of groups of first comb plates and a plurality of expansion joint fixing flat steels, wherein two steel plates are fixedly installed on one group of steel plate fixing flat steels in parallel, the other two steel plates are fixedly installed on the other group of steel plate fixing flat steels in parallel, the distance between the two steel plates on one group of steel plate fixing flat steels is greater than the distance between the two parallel steel plates on the other group of steel plate fixing flat steels, two expansion joint fixing flat steels are arranged on each expansion joint, the two expansion joint fixing flat steels are symmetrically and fixedly installed on the expansion joints, the two expansion joint fixing flat steels on each expansion joint are fixedly installed on the outer side walls of two adjacent superheater tubes respectively, the two expansion joint fixing flat steels are installed on two groups of steel plate fixing flat steels respectively in parallel symmetry, the two superheater tubes on two groups of one row of superheater tubes are arranged on the two adjacent end faces of the two adjacent steel plate fixing flat plates, the two parallel end faces of the two adjacent steel plates are arranged on the two adjacent comb tubes, and the two end faces of the two adjacent comb tubes are arranged on the two adjacent comb tubes.
The beneficial effects of the invention are as follows:
1. the expansion joint fixing flat steel 1 is divided into two sections to be welded at the edge of the pipe vertically, and the expansion joint 2 is welded with the expansion joint fixing flat steel 1, so that expansion limitation of the pipe and the flat steel can be effectively solved, leakage caused by stress concentration and crack of the pipe is prevented, and operation safety is ensured.
2. The sealing filling block 3 is arranged on the expansion joint 2 and is arranged outside the smoke to prevent smoke leakage.
3. The steel plate fixed flat steel 4 is vertically arranged and welded with the superheater tube, one on each side of the superheater tube, the steel plate 5 is welded with the steel plate fixed flat steel 4, and the lap joint mode is adopted between the two steel plates 5 on the two groups of steel plate fixed flat steel 4, so that free expansion and good tail sealing are ensured.
4. The first comb-shaped plate 6 is arranged at the upper end and the lower end of the steel plate 5, the second comb-shaped plate 7 is arranged at the upper end and the lower end of the steel plate fixing flat steel 4 and the upper end and the lower end of the steel plate 5, the first comb-shaped plate 6 is divided into a plurality of sections, each section of the first comb-shaped plate 6 is only welded with a superheater tube, and the first comb-shaped plates are not welded with each other or the steel plates 4 and 5. Free expansion and good tail sealing are ensured.
5. The invention ensures the safe operation of the boiler, and the continuous operation hours reach more than 7000 hours; the maintenance cost and the labor cost are reduced; the cost is saved by 5-10%, and the economic loss of the power plant caused by furnace shutdown is reduced.
Drawings
FIG. 1 is a schematic diagram of the invention mounted on a circulating fluidized bed boiler tail side wall superheater tube with an upper header disposed thereon.
Fig. 2 is a view in the A-A direction of fig. 1.
Detailed Description
The first embodiment is as follows: referring to fig. 1-2, a device for preventing tearing of a superheater tube on a side wall of a tail portion of a circulating fluidized bed boiler according to the present embodiment includes two steel plate fixing flat steels 4, four second comb plates 7, four steel plates 5, a plurality of expansion joints 2, a plurality of sealing packing 3, a plurality of first comb plates 6 and a plurality of expansion joint fixing flat steels 1, two steel plates 5 are fixedly mounted on one steel plate fixing flat steels 4 in parallel, the other two steel plates 5 are fixedly mounted on the other steel plate fixing flat steels 4 in parallel, wherein the distance between the two steel plates 5 on the one steel plate fixing flat steels 4 is greater than the distance between the two parallel steel plates 5 on the other steel plate fixing flat steels 4, two expansion joint fixing flat steels 1 are arranged on each expansion joint 2, the two expansion joint fixing flat steels 1 are symmetrically and fixedly mounted on the expansion joint 2, two expansion joint fixing flat steels 1 on each expansion joint 2 are respectively and fixedly arranged on the outer side walls of two adjacent superheater tubes, a sealing filling block 3 is arranged on each expansion joint 2, two groups of steel plate fixing flat steels 4 are respectively and symmetrically arranged on two superheater tubes positioned on two sides of one row of superheater tubes in parallel, two steel plates 5 on one group of steel plate fixing flat steels 4 are arranged on the outer sides of two steel plates 5 on the other group of steel plate fixing flat steels 4 in parallel, two groups of second comb plates 7 are fixedly arranged on each superheater tube positioned on two sides of one row of superheater tubes in parallel, one group of second comb plates 7 are arranged on the upper end faces of the two adjacent steel plates 5, the other group of second comb plates 7 are arranged on the lower end faces of the two adjacent steel plates 5, two groups of first comb plates 6 are fixedly arranged on each superheater tube positioned between two sides of one row of superheater tubes in parallel, one group of first comb-shaped plates 6 is arranged on the upper end faces of two adjacent steel plates 5, and the other group of first comb-shaped plates 6 is arranged on the lower end faces of two adjacent steel plates 5.
The second embodiment is as follows: referring to fig. 1-2, a device for preventing a superheater tube from tearing on a side wall of a tail portion of a circulating fluidized bed boiler according to the present embodiment is described, wherein each group of steel plate fixing flat steels 4 includes two steel plate fixing flat steels 4, and the two steel plate fixing flat steels 4 are relatively vertically and fixedly installed on the outer side wall of each side superheater tube on a row of superheater tubes, which is the same as that of the first embodiment.
And a third specific embodiment: referring to fig. 1-2, a description is given of this embodiment of a device for preventing tearing of a superheater tube on a side wall of a tail portion of a circulating fluidized bed boiler, each group of first comb plates 6 includes two first comb plates 6, each first comb plate 6 is a rectangular plate, an arc hole is machined on one side of each first comb plate 6, the two first comb plates 6 are oppositely arranged on a superheater tube, an arc hole side wall of each first comb plate 6 is fixedly arranged on an outer side wall of the superheater tube, and the two first comb plates 6 of each group of first comb plates 6 are located on two sides of two expansion joint fixing flat steel 1 on the superheater tube. The other is the same as in the first embodiment.
The specific embodiment IV is as follows: referring to fig. 1-2, a description is given of the present embodiment of a device for preventing tearing of a superheater tube on a side wall of a tail portion of a circulating fluidized bed boiler, each set of second comb plates 7 includes two second comb plates 7, each second comb plate 7 is a rectangular plate, one corner of each second comb plate 7 is processed with an arc hole, the two second comb plates 7 are oppositely disposed on the superheater tube on the same side as a steel plate fixing flat steel 4, the side wall of the arc hole of each second comb plate 7 is fixedly disposed on the outer side wall of the superheater tube, and the two second comb plates 7 of each set of second comb plates 7 are disposed on two sides of the superheater tube where an expansion joint is fixed flat steel 1, otherwise the same as the first embodiment.
Claims (1)
1. Device for preventing tearing of circulating fluidized bed boiler afterbody side package wall superheater tube, its characterized in that: the expansion joint comprises two groups of steel plate fixing flat steels (4), four groups of second comb plates (7), four steel plates (5), a plurality of expansion joints (2), a plurality of sealing filling blocks (3), a plurality of groups of first comb plates (6) and a plurality of expansion joint fixing flat steels (1), wherein each group of steel plate fixing flat steels (4) comprises two steel plate fixing flat steels (4), each group of first comb plates (6) comprises two first comb plates (6), each group of second comb plates (7) comprises two second comb plates (7), two steel plates (5) are fixedly installed on one group of steel plate fixing flat steels (4) in parallel, the other two steel plates (5) are fixedly installed on the other group of steel plate fixing flat steels (4) in parallel, the distance between the two steel plates (5) on one group of steel plate fixing flat steels (4) is larger than the distance between the two parallel steel plates (5) on the other group of steel plate fixing flat steels, two expansion joint fixing flat steels (1) are arranged on each expansion joint (2), the two expansion joint fixing flat steels (1) are symmetrically installed on the two expansion joint fixing flat steels (2) respectively, the expansion joint fixing flat steels (3) are installed on the side walls of two expansion joint fixing flat steels (2) respectively, two groups of steel plate fixing flat steels (4) are respectively and symmetrically arranged on two superheater tubes at two sides of one row of superheater tubes in parallel, two steel plates (5) on one group of steel plate fixing flat steels (4) are arranged on the outer sides of two steel plates (5) on the other group of steel plate fixing flat steels (4) in parallel, two groups of second comb plates (7) are fixedly arranged on each superheater tube at two sides of the one row of superheater tubes in parallel, one group of second comb plates (7) are arranged on the upper end surfaces of the adjacent two steel plates (5), the other group of second comb plates (7) are arranged on the lower end surfaces of the adjacent two steel plates (5), two groups of first comb plates (6) are fixedly arranged on each superheater tube between two sides of the one row of superheater tubes in parallel, the other group of first comb plates (6) are arranged on the upper end surfaces of the adjacent two steel plates (5), two groups of first comb plates are arranged on the upper side walls of the adjacent two adjacent steel plates (6) of the one row of superheater tubes in parallel, the two groups of first comb plates are arranged on the opposite side walls of the two opposite side walls of the first comb plates (6) which are arranged on the opposite side walls of the first comb plates (6) of the first comb plates, and two first comb template (6) of every group first comb template (6) are located the both sides of two expansion joint fixed band steel (1) on the superheater tube, and second comb template (7) are rectangular shaped plate, and an angle processing of every second comb template (7) has an arc hole, and two second comb templates (7) set up relatively on the superheater tube of steel sheet fixed band steel (4) same side, and the arc hole lateral wall fixed mounting of every second comb template (7) is on the lateral wall of superheater tube, and the both sides of expansion joint fixed band steel (1) on the superheater tube are located to two second comb templates (7) of every group second comb template (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711147469.8A CN107676777B (en) | 2017-11-17 | 2017-11-17 | Device for preventing tearing of superheater tube of side wall wrapping at tail part of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711147469.8A CN107676777B (en) | 2017-11-17 | 2017-11-17 | Device for preventing tearing of superheater tube of side wall wrapping at tail part of circulating fluidized bed boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107676777A CN107676777A (en) | 2018-02-09 |
| CN107676777B true CN107676777B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711147469.8A Active CN107676777B (en) | 2017-11-17 | 2017-11-17 | Device for preventing tearing of superheater tube of side wall wrapping at tail part of circulating fluidized bed boiler |
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| Country | Link |
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| CN (1) | CN107676777B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5277151A (en) * | 1993-01-19 | 1994-01-11 | Tampella Power Corporation | Integral water-cooled circulating fluidized bed boiler system |
| CN202733880U (en) * | 2012-07-04 | 2013-02-13 | 南通万达锅炉有限公司 | Superheater guide sealing device |
| CN103453511A (en) * | 2013-09-05 | 2013-12-18 | 无锡华光锅炉股份有限公司 | Arrangement structure for wall enclosure header of boiler |
| CN204372155U (en) * | 2014-12-24 | 2015-06-03 | 哈尔滨锅炉厂有限责任公司 | The sealing configuration of boiler back end ductwork |
| CN204554787U (en) * | 2015-03-03 | 2015-08-12 | 云南大唐国际红河发电有限责任公司 | The external bed for circulating fluidized bed boiler secondary medium temperature overheater improved |
-
2017
- 2017-11-17 CN CN201711147469.8A patent/CN107676777B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5277151A (en) * | 1993-01-19 | 1994-01-11 | Tampella Power Corporation | Integral water-cooled circulating fluidized bed boiler system |
| CN202733880U (en) * | 2012-07-04 | 2013-02-13 | 南通万达锅炉有限公司 | Superheater guide sealing device |
| CN103453511A (en) * | 2013-09-05 | 2013-12-18 | 无锡华光锅炉股份有限公司 | Arrangement structure for wall enclosure header of boiler |
| CN204372155U (en) * | 2014-12-24 | 2015-06-03 | 哈尔滨锅炉厂有限责任公司 | The sealing configuration of boiler back end ductwork |
| CN204554787U (en) * | 2015-03-03 | 2015-08-12 | 云南大唐国际红河发电有限责任公司 | The external bed for circulating fluidized bed boiler secondary medium temperature overheater improved |
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| Publication number | Publication date |
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| CN107676777A (en) | 2018-02-09 |
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