CN203010587U - Boiler returning device - Google Patents
Boiler returning device Download PDFInfo
- Publication number
- CN203010587U CN203010587U CN 201220622382 CN201220622382U CN203010587U CN 203010587 U CN203010587 U CN 203010587U CN 201220622382 CN201220622382 CN 201220622382 CN 201220622382 U CN201220622382 U CN 201220622382U CN 203010587 U CN203010587 U CN 203010587U
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- tube
- returning
- boiler
- pipe
- vertical water
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- Expired - Fee Related
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Abstract
The utility model relates to an oilfield circulating fluidized bed boiler, and in particular relates to a boiler returning device. A stainless steel metallic bellow expansion joint is arranged between a returning inclined pipe of the device and a vertical water-cooled wall pipe of a hearth; the included angle between the returning inclined pipe and the vertical water-cooled wall pipe of the hearth is 55-60 degrees, and the included angle between the stainless steel metallic bellow expansion joint and the vertical water-cooled wall pipe of the hearth is 55-60 degrees; an air cap is designed in a structure that the included angle between pipes is 90 degrees; an ash discharge pipe is connected to the lower end of an air chamber; a sealing door is arranged on the lower part of the ash discharge pipe; a coke discharge pipe is added on an air outlet plate; the extending part of the coke discharge pipe is fixed on the air outlet plate through a stainless steel plate; and a sealing door is arranged on the lower part of the coke discharge pipe. By adopting the boiler returning device, cracking at the joint of the returning inclined pipe and the water-cooled wall pipe of the hearth is avoided; and fine materials flowing into the returning air chamber and coke on the air outlet plate can be timely discharged out of the boiler, so that materials are circulated smoothly, the circulating efficiency and the burnout rate of the materials are improved, and the continuous and stable operation and the yield of the boiler are ensured.
Description
Technical field:
The utility model relates to a kind of oil field CFBB, particularly a kind of boiler material-returning device.
Background technology:
When the oil field CFBB moves, material circulates in this closed path at burner hearth, cyclone separator, down-comer, material-returning device, because vibration and the thermal expansion degree of water-cooling wall pipe of burner hearth, returning charge inclined tube are different, cause weld cracking between inclined tube and water screen tube, material leaks, and flue gas is altered outward.Between inclined tube and vertical water-wall tube, angle is larger, has some setbacks when causing material to enter burner hearth, and boiler operatiopn is unstable, affects it and exerts oneself.Under material washed away for a long time, the blast cap of returning charge air compartment (straight pipe type) serious wear had the tiny material of part to flow to air compartment, causes the returning charge deficiency in draught.Material is when flowing through material-returning device, and local high temperature can cause coking, and the carbonizing matter on exhausting plate can stop that the high-pressure blast of a large amount of fluidisation materials enters in down-comer, has destroyed the circulation of material, causes the blowing out accident.
The utility model content:
The technical problems to be solved in the utility model is to provide a kind of boiler material-returning device, this device has realized avoiding returning charge inclined tube and water-cooling wall pipe of burner hearth junction cracking, can in time discharge out of the furnace flowing into the tiny material of returning charge air compartment and the carbonizing matter on exhausting plate, make Matter Transfer smooth, improved cycle efficieny and the burnout rate of material, guaranteed the boiler continuous and steady operation and go out power rate.Overcome the deficiency that in cracking between the returning charge inclined tube of existing CFBB and furnace wall cooling, blast cap wearing and tearing, returning charge air compartment, on solid accumulation and exhausting plate, carbonizing matter is difficult to discharge.
Technical solution adopted in the utility model is: a kind of boiler material-returning device comprises burner hearth, cyclone separator, down-comer, air compartment, returning charge inclined tube, burner hearth vertical water-wall tube, exhausting plate and blast cap; Install the stainless steel metal expansion bellow additional between returning charge inclined tube and burner hearth vertical water-wall tube, angle between returning charge inclined tube and stainless steel metal expansion bellow and burner hearth vertical water-wall tube is arranged in 55 ° of-60 ° of scopes, it is the structure of 90 ° that blast cap is designed to angle between tube and tube, at air compartment lower end connection ash releasing tube, the ash releasing tube bottom is provided with hermatic door, install a coke discharging tube additional on exhausting plate, the coke discharging tube extension is fixed on exhausting plate by corrosion resistant plate, and the coke discharging tube bottom is provided with hermatic door.
The beneficial effects of the utility model are: the utility model has been owing to having adopted the mode that installs the stainless steel metal expansion bellow additional, thereby has the effect of avoiding returning charge inclined tube and water-cooling wall pipe of burner hearth junction cracking; Owing to having adopted the mode that connects ash releasing tube and coke discharging tube, thereby have and to flow into the tiny material of returning charge air compartment and the function that the carbonizing matter on exhausting plate in time discharges out of the furnace, make Matter Transfer smooth, improved cycle efficieny and the burnout rate of material, guaranteed the boiler continuous and steady operation and go out power rate.
Description of drawings:
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is structural representation of the present utility model.
The specific embodiment:
As shown in drawings, a kind of boiler material-returning device comprises burner hearth 1, cyclone separator 2, down-comer 3, air compartment 4, returning charge inclined tube 5, burner hearth vertical water-wall tube 6, exhausting plate 8 and blast cap 9; Install stainless steel metal expansion bellow 7 additional between returning charge inclined tube 5 and burner hearth vertical water-wall tube 6, in order to overcome thermal stress and amplitude, avoid the weld cracking of returning charge inclined tube 5 and burner hearth vertical water-wall tube 6.Angle between returning charge inclined tube 5 and stainless steel metal expansion bellow 7 and burner hearth vertical water-wall tube 6 is arranged in 55 ° of-60 ° of scopes, and material enters burner hearth swimmingly under the double action of deadweight and returning charge wind.It is the structure of 90 ° that blast cap 9 is designed to angle between tube and tube, and the wearing-in period that can extend blast cap 9 has also reduced tiny material and entered returning charge air compartment 4.Connect ash releasing tubes 10 in air compartment 4 lower ends, ash releasing tube 10 bottoms are provided with hermatic door 12, to entering the material of air compartment 4, can discharge at any time by ash releasing tube 10, ensure sufficient returning charge air quantity.Install a coke discharging tube 11 on exhausting plate 8 additional, coke discharging tube 11 extensions are fixed on exhausting plate 8 by corrosion resistant plate, and coke discharging tube 11 bottoms are provided with hermatic door 12, can according to on-the-spot practical operation situation, discharge coking material.
Be understandable that, above about specific descriptions of the present utility model, only for the utility model being described and being not to be subject to the described technical scheme of the utility model embodiment, those of ordinary skill in the art is to be understood that, still can modify or be equal to replacement the utility model, to reach identical technique effect; Use needs as long as satisfy, all within protection domain of the present utility model.
Claims (1)
1. a boiler material-returning device, comprise burner hearth (1), cyclone separator (2), down-comer (3), air compartment (4), returning charge inclined tube (5), burner hearth vertical water-wall tube (6), exhausting plate (8) and blast cap (9), it is characterized in that: install stainless steel metal expansion bellow (7) additional between returning charge inclined tube (5) and burner hearth vertical water-wall tube (6), angle between returning charge inclined tube (5) and stainless steel metal expansion bellow (7) and burner hearth vertical water-wall tube (6) is arranged in 55 ° of-60 ° of scopes, it is the structure of 90 ° that blast cap (9) is designed to angle between tube and tube, at air compartment (4) lower end connection ash releasing tube (10), ash releasing tube (10) bottom is provided with hermatic door (12), install a coke discharging tube (11) additional on exhausting plate (8), coke discharging tube (11) extension is fixed on exhausting plate (8) by corrosion resistant plate, coke discharging tube (11) bottom is provided with hermatic door (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220622382 CN203010587U (en) | 2012-11-21 | 2012-11-21 | Boiler returning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220622382 CN203010587U (en) | 2012-11-21 | 2012-11-21 | Boiler returning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203010587U true CN203010587U (en) | 2013-06-19 |
Family
ID=48602176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220622382 Expired - Fee Related CN203010587U (en) | 2012-11-21 | 2012-11-21 | Boiler returning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203010587U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287688A (en) * | 2016-01-31 | 2017-01-04 | 无锡华光锅炉股份有限公司 | A kind of material returning device bellows structure |
| CN109268823A (en) * | 2018-08-24 | 2019-01-25 | 东方电气集团东方锅炉股份有限公司 | A kind of circulating fluidized bed boiler and control method for preventing material returning device from vibrating |
-
2012
- 2012-11-21 CN CN 201220622382 patent/CN203010587U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287688A (en) * | 2016-01-31 | 2017-01-04 | 无锡华光锅炉股份有限公司 | A kind of material returning device bellows structure |
| CN109268823A (en) * | 2018-08-24 | 2019-01-25 | 东方电气集团东方锅炉股份有限公司 | A kind of circulating fluidized bed boiler and control method for preventing material returning device from vibrating |
| CN109268823B (en) * | 2018-08-24 | 2023-08-18 | 东方电气集团东方锅炉股份有限公司 | Circulating fluidized bed boiler capable of preventing material returning device from vibrating and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20131121 |