CN202692030U - Circulating fluidized bed steam boiler with natural circulation - Google Patents
Circulating fluidized bed steam boiler with natural circulation Download PDFInfo
- Publication number
- CN202692030U CN202692030U CN 201220333591 CN201220333591U CN202692030U CN 202692030 U CN202692030 U CN 202692030U CN 201220333591 CN201220333591 CN 201220333591 CN 201220333591 U CN201220333591 U CN 201220333591U CN 202692030 U CN202692030 U CN 202692030U
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- CN
- China
- Prior art keywords
- fluidized bed
- steam boiler
- convection bank
- bed steam
- cyclone separator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a circulating fluidized bed steam boiler with natural circulation. The circulating fluidized bed steam boiler comprises a furnace water cooled wall, a combustion device arranged on the lower part of the furnace water cooled wall, a high-temperature cyclone separator arranged at the outlet on the upper part of the furnace water cooled wall; a feed recycle device arranged at the lower part of the high-temperature cyclone separator; a water cooled diversion smoke chamber consisting of a membrane-type wall and a water cooled ceiling is arranged on the upper part of the high-temperature cyclone separator; a convection bank is arranged on the rear part of the water cooled diversion smoke chamber; the upper and lower ends of the convection bank are respectively connected with two boiler drums; and an economizer and a soft water heater are arranged on the tail part of the convection bank in sequence. The circulating fluidized bed steam boiler provided by the utility model is simple in structure and easy to implement, and can not only ensure reasonable heat transfer efficiency but also solve the problem of ash deposition and abrasion of pipe bundles, thereby prolonging the service life.
Description
Technical field
The utility model relates to a kind of steam boiler, relates in particular to a kind of recirculating fluidized bed steam boiler of Natural Circulation.
Background technology
General nature cyclic steam boiler adopts Natural Circulation furnace water cooling heating surface, the snakelike tube bank of brace type more, because structure and heat-transfer character cause the inner loop water flow velocity low, safety coefficient is low.And general CFBB flow process is complicated, and the water collateral resistance is bigger than normal.Transversal flow is adopted in the snakelike tube bank of afterbody, and serious wear, structure adopt and support complex structure, maintenance difficult.
The utility model content
The purpose of this utility model provides a kind of recirculating fluidized bed steam boiler that adopts Natural Circulation furnace wall cooling and brand-new up and down drum to restrain hanging structure.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of recirculating fluidized bed steam boiler of Natural Circulation, comprise furnace wall cooling, the furnace wall cooling bottom is provided with burner, exit, furnace wall cooling top is provided with high temperature cyclone separator, the high temperature cyclone separator bottom is provided with material-returning device, be provided with the water-cooled that is formed by membrane wall water-cooled ceiling on high temperature cyclone separator top and turn to smoke-box, water-cooled turns to the smoke-box rear portion to be provided with convection bank, convection bank is connected with two drums respectively up and down, and the convection bank afterbody is disposed with economizer and soft water heater.
Described furnace wall cooling adopts the tube structure to form by the fin panel casing outside.
Described convection bank adopts many backhauls forward to wash away, and adopts the light-duty tube structure of membrane wall around the convection bank.
Described high temperature cyclone separator is connected with membrane wall water-cooled ceiling welded seal and hangs fixing.
Described economizer and soft water heater adopt the split type width cast iron gilled tube economizer of standalone module and soft water heater two-stage structure.
The utility model has the advantage of: 1, be connected by convection bank between the lower drum in the employing, many backhauls parallel baffled is adopted in convection bank, namely guaranteed rational heat transfer efficiency, solved again dust stratification and the wear problem of tube bank, also made the simple and easy to implement of structure change; 2, membrane wall water-cooled ceiling and turn to the smoke-box structure to be different from former adiabatic ceiling and turn to the smoke-box structure by what membrane wall water-cooled ceiling formed, its thermal inertia is little and make structure more simple and reliable; 3, the split type width cast iron gilled tube economizer of standalone module and soft water heater two-stage structure can be realized low temperature or ultralow temperature discharging, have cancelled the extremely complicated air channel of air preheater and have connected, and make and arrange simply.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
As shown in Figure 1, a kind of recirculating fluidized bed steam boiler of Natural Circulation comprises furnace wall cooling 1, furnace wall cooling 1 adopts the tube structure to form by the fin panel casing outside, furnace wall cooling forms burner hearth and adopts overhung construction, arranges buckstay all around, and enough bearing capacitys are arranged; Furnace wall cooling 1 bottom is provided with burner 10, and exit, furnace wall cooling 1 top is provided with high temperature cyclone separator 2, and the flexible non-metallic expansion joint is adopted in furnace water cooling wall outlet and high temperature cyclone separator porch, guarantees sealing property herein; High temperature cyclone separator 2 bottoms are provided with material-returning device 3, be provided with the water-cooled that is formed by membrane wall water-cooled ceiling 4 on high temperature cyclone separator 2 tops and turn to smoke-box 5, water-cooled turns to smoke-box 5 rear portions to be provided with convection bank 6, convection bank 6 is connected with two drums 11 respectively up and down, and convection bank 6 afterbodys are disposed with economizer 8 and soft water heater 9.Described.Described convection bank 6 adopts many backhauls forward to wash away, adopt the light-duty tube structure 7 of membrane wall around the convection bank 6, and arrange buckstay all around, enough bearing capacitys are arranged, upper drum is supported on the steelframe drum beam and (does not show among the prior art figure), hangs lower drum by convection bank 6.Described high temperature cyclone separator 2 is connected with membrane wall water-cooled ceiling 4 welded seals and hangs fixing.Described economizer 8 and soft water heater 9 adopt the split type width cast iron gilled tube economizer of standalone module and soft water heater two-stage structure.
In the utility model, burner 10 parts are to adopt the brace type fluid bed, be provided with the expansion stretching structure with the upper furnace junction, fuel carries out fluidized bed combustion in lower furnace portion emulsion zone combustion chamber, the hot flue gas of burning enters high temperature cyclone separator 2 by burner hearth smokestack mouth, the material that separates is sent into the ciculation fluidized burning in burner hearth emulsion zone combustion chamber again by material-returning device 3, flue gas after the separation enters water-cooled and turns to smoke-box 5, then pass through successively the split type width cast iron gilled tube economizer 8 of convection bank 6 and standalone module and soft water heater 9, enter chimney finally by air-introduced machine.
Enter upper drum after 8 preheatings of feedwater process economizer, after part water enters the furnace wall cooling lower header through the down-comer that connects drum, being heated into steam water interface at furnace wall cooling rises, enter upper drum by wireway, do Natural Circulation in the convection bank 6 of another part water lower drum on connecting, supply with the user after the water separator of last steam water interface in drum separates.
Claims (5)
1. the recirculating fluidized bed steam boiler of a Natural Circulation, comprise furnace wall cooling, the furnace wall cooling bottom is provided with burner, it is characterized in that, exit, furnace wall cooling top is provided with high temperature cyclone separator, the high temperature cyclone separator bottom is provided with material-returning device, be provided with the water-cooled that is formed by membrane wall water-cooled ceiling on high temperature cyclone separator top and turn to smoke-box, water-cooled turns to the smoke-box rear portion to be provided with convection bank, convection bank is connected with two drums respectively up and down, and the convection bank afterbody is disposed with economizer and soft water heater.
2. the recirculating fluidized bed steam boiler of Natural Circulation as claimed in claim 1 is characterized in that, described furnace wall cooling adopts the tube structure to form by the fin panel casing outside.
3. the recirculating fluidized bed steam boiler of Natural Circulation as claimed in claim 1 or 2 is characterized in that, described convection bank adopts many backhauls forward to wash away, and adopts the light-duty tube structure of membrane wall around the convection bank.
4. the recirculating fluidized bed steam boiler of Natural Circulation as claimed in claim 3 is characterized in that, described high temperature cyclone separator is connected with membrane wall water-cooled ceiling welded seal and hangs fixing.
5. the recirculating fluidized bed steam boiler of Natural Circulation as claimed in claim 4 is characterized in that, described economizer and soft water heater adopt the split type width cast iron gilled tube economizer of standalone module and soft water heater two-stage structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333591 CN202692030U (en) | 2012-07-11 | 2012-07-11 | Circulating fluidized bed steam boiler with natural circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333591 CN202692030U (en) | 2012-07-11 | 2012-07-11 | Circulating fluidized bed steam boiler with natural circulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202692030U true CN202692030U (en) | 2013-01-23 |
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ID=47547642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220333591 Expired - Fee Related CN202692030U (en) | 2012-07-11 | 2012-07-11 | Circulating fluidized bed steam boiler with natural circulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202692030U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791752A (en) * | 2015-04-15 | 2015-07-22 | 哈尔滨工业大学 | Dual-direct-current circulating fluidized bed steam-injection boiler with vertical evaporating pipes inside |
-
2012
- 2012-07-11 CN CN 201220333591 patent/CN202692030U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791752A (en) * | 2015-04-15 | 2015-07-22 | 哈尔滨工业大学 | Dual-direct-current circulating fluidized bed steam-injection boiler with vertical evaporating pipes inside |
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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: 20130123 Termination date: 20150711 |
|
| EXPY | Termination of patent right or utility model |