CN201503012U - Water-cooling material return device of circulating fluidized bed boiler - Google Patents
Water-cooling material return device of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN201503012U CN201503012U CN2009200480997U CN200920048099U CN201503012U CN 201503012 U CN201503012 U CN 201503012U CN 2009200480997 U CN2009200480997 U CN 2009200480997U CN 200920048099 U CN200920048099 U CN 200920048099U CN 201503012 U CN201503012 U CN 201503012U
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- water
- material return
- return device
- returning device
- material returning
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Abstract
The utility model relates to a material return device, in particular to a water-cooling material return device of a circulating fluidized bed boiler, belonging to the technical field of the circulating fluidized bed boiler. The technical scheme is as follows: the water-cooling material return device of the circulating fluidized bed boiler comprises a U-shaped valve material return device, a material return vertical pipe, a hearth and a material return pipe, wherein a water-cooling heat exchange pipe is arranged between the U-shaped valve material return device and the material return vertical pipe; and the two ends of the water-cooling heat exchange pipe are respectively connected with a water inlet collecting box and a water outlet collecting box. The water-cooling material return device has simple structure, is economical and environment-friendly, and improves the stability of the boiler.
Description
Technical field
The utility model relates to a kind of material returning device, and especially a kind of water cooling material returning device of CFBB belongs to the technical field of CFBB.
Background technology
The material returning device of CFBB revert system commonly used is an on-mechanical U type valve material returning device.When high brown coal of boiler combustion fugitive constituent and high-quality bituminous coal, the material returning device returning charge is normal, and when the fuel that the low difficulties such as anthracite of boiler combustion fugitive constituent burn, the boiler afterburning can occur, cause the serious overtemperature slagging scorification of on-mechanical U type valve material returning device coking phenomenon, returning charge is smooth even stop up can't returning charge, fluidized bed temperature is difficult to regulate and control, lose the function of CFBB fluidisation, circulation, burning, caused the boiler to stop using, influenced production efficiency.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of water cooling material returning device of CFBB is provided, and it is simple in structure, and economic environmental protection has improved the stability of boiler.
According to the technical scheme that the utility model provides, a kind of water cooling material returning device of CFBB comprises U type valve material returning device, returning charge standpipe, burner hearth and feed back pipe; Be provided with the water-cooled heat exchanger tube between described U type valve material returning device and returning charge standpipe, the two ends of described water-cooled heat exchanger tube are connected with water inlet collection case and water outlet collection case respectively.
The bottom of described U type valve material returning device is provided with bellows.Described returning charge standpipe is connected with the lower end of high-temperature heat insulation cyclone separator.The port of export of described returning charge standpipe is connected with the entrance point of feed back pipe, and the other end of described feed back pipe links to each other with burner hearth, and described feed back pipe is provided with expansion joint with the vertical section that the returning charge standpipe is connected.
Advantage of the present utility model: simple in structure, improved the stability of boiler operatiopn, make fluidized bed temperature regulate and control conveniently, saved the energy, improved the thermal efficiency of boiler.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
As shown in Figure 1: the utility model comprises that burner hearth 1, feed back pipe 2, expansion joint 3, bellows 4, U type valve material returning device 5, water-cooled heat exchanger tube 6, water inlet collection case 7, water outlet collection case 8, returning charge standpipe 9 and high-temperature heat insulation cyclone separator 10 constitute.
Be provided with water-cooled heat exchanger tube 6 at described U type valve material returning device 5 and 9 of returning charge standpipes, the two ends of described water-cooled heat exchanger tube 6 are connected with water inlet collection case 7 and water outlet collection case 8 respectively, water inlet collection case 7 is communicated with the boiler feed water pipeline, and water outlet collection case 8 is connected with the mixing header of supply line.Described returning charge standpipe 9 is connected with the lower end of high-temperature heat insulation cyclone separator 10, and returning charge standpipe 9 constitutes the blanking sealed circuit with high-temperature heat insulation cyclone separator 10.
The lower end of described U type valve material returning device 5 is provided with bellows 4.The two ends of feed back pipe 2 are connected with returning charge standpipe 9 and burner hearth 1 respectively, and the vertical section that is connected with returning charge standpipe 9 on the described feed back pipe 2 is provided with expansion joint 3, when preventing the variations in temperature of burner hearth 1, cause the fracture of feed back pipe 2.
During use, high-temperature flue gas dust-laden particle enters in the returning charge standpipe 9 from high-temperature heat insulation cyclone separator 10, the two ends of water-cooled heat exchanger tube 6 are connected with water inlet collection case 7 and water outlet collection case 8, by carry out heat exchange in water-cooled heat exchanger tube 6, make the high-temperature material cooling at returning charge standpipe 9.Send into the loosening wind of fluidisation from bellows 4, the ascent stage of utilizing U type valve material returning device 5 and the foldback power of the material level difference of descending branch as recycle stock, with recycle stock steady ordered ground foldback in burner hearth 1, the realization circulating combustion.Utilize the heat exchange of water-cooled heat exchanger tube 6, make the high-temperature material cooling extent that separates from high-temperature heat insulation cyclone separator 10 reach 150～200 ℃, not slagging scorification noncoking when making 5 operations of U type valve material returning device, hot water after water cooling heat exchanger 6 exchanges is sent into the mixing header of supply line by water outlet collection case 8, improved the temperature of water in the mixing header, improve the thermal efficiency of boiler, saved the energy.
Claims (4)
1. the water cooling material returning device of a CFBB, comprise U type valve material returning device (5), returning charge standpipe (9), burner hearth (1) and feed back pipe (2), it is characterized in that: be provided with water-cooled heat exchanger tube (6) between described U type valve material returning device (5) and returning charge standpipe (9), the two ends of described water-cooled heat exchanger tube (6) are connected with water inlet collection case (7) and water outlet collection case (8) respectively.
2. according to the water cooling material returning device of the described a kind of CFBB of claim 1, it is characterized in that: the bottom of described U type valve material returning device (5) is provided with bellows (4).
3. according to the water cooling material returning device of the described a kind of CFBB of claim 1, it is characterized in that: described returning charge standpipe (9) is connected with the lower end of high-temperature heat insulation cyclone separator (10).
4. according to the water cooling material returning device of the described a kind of CFBB of claim 1, it is characterized in that: the port of export of described returning charge standpipe (9) is connected with feed back pipe (2), the other end of described feed back pipe (2) links to each other with burner hearth (1), and the vertical section that described feed back pipe (2) is connected with returning charge standpipe (9) is provided with expansion joint (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200480997U CN201503012U (en) | 2009-08-28 | 2009-08-28 | Water-cooling material return device of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200480997U CN201503012U (en) | 2009-08-28 | 2009-08-28 | Water-cooling material return device of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201503012U true CN201503012U (en) | 2010-06-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200480997U Expired - Fee Related CN201503012U (en) | 2009-08-28 | 2009-08-28 | Water-cooling material return device of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201503012U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322559A (en) * | 2013-06-09 | 2013-09-25 | 无锡华光锅炉股份有限公司 | Assembled separator structure |
| CN113864770A (en) * | 2021-10-14 | 2021-12-31 | 华电国际电力股份有限公司天津开发区分公司 | Return air system of circulating fluidized bed boiler |
-
2009
- 2009-08-28 CN CN2009200480997U patent/CN201503012U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322559A (en) * | 2013-06-09 | 2013-09-25 | 无锡华光锅炉股份有限公司 | Assembled separator structure |
| CN113864770A (en) * | 2021-10-14 | 2021-12-31 | 华电国际电力股份有限公司天津开发区分公司 | Return air system of circulating fluidized bed boiler |
| CN113864770B (en) * | 2021-10-14 | 2023-08-22 | 华电国际电力股份有限公司天津开发区分公司 | Material returning air system of circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20150828 |
|
| EXPY | Termination of patent right or utility model |