CN101943395A - Circulating fluidized bed boiler - Google Patents
Circulating fluidized bed boiler Download PDFInfo
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- CN101943395A CN101943395A CN 201010295366 CN201010295366A CN101943395A CN 101943395 A CN101943395 A CN 101943395A CN 201010295366 CN201010295366 CN 201010295366 CN 201010295366 A CN201010295366 A CN 201010295366A CN 101943395 A CN101943395 A CN 101943395A
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- fluidized bed
- circulating fluidized
- superheater
- high temperature
- bed boiler
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Abstract
The invention discloses a circulating fluidized bed boiler which comprises a hearth, a hearth outlet arranged at the upper part of the hearth, a membrane wall arranged in the hearth and a convection flue gas pass connected with the hearth outlet, wherein a high-temperature superheater is arranged in the hearth, the high-temperature superheater is arranged and fixed above the hearth, the high-temperature superheater extends into the hearth, and the extension height is higher than the height of the hearth outlet. The invention can greatly reduce the manufacturing and installation cost of the boiler, and can effectively solve the technical problems that repeated low-temperature burning and desulfuration reaction can not be effectively promoted at the same time, the emission of NOx can not be effectively reduced, etc. At the same time, the invention has the characteristics of small manufacturing cost, high vulcanizing efficiency, long service life and the like.
Description
Technical field
The invention belongs to boiler manufacturing technology field, specifically, relate to a kind of circulating fluidized bed boiler.
Background technology
At present, circulating fluidized bed technique is efficient, the low clean burning technology of polluting of a new generation that develops rapidly in recent ten years, its main feature is that fuel and desulfurizing agent are through repeatedly circulation, carry out low-temperature burning and desulphurization reaction repeatedly, it is strong to breathe heavily the stream motion in the stove, not only can reach low NOx drainage, 90% desulfuration efficiency and the efficiency of combustion close, and have that fuel tolerance is wide, load adjustment ability good, lime-ash is easy to advantages such as comprehensive utilization with coal-powder boiler.
In the prior art, the most of CFBB high temperature superheater heating surfaces on the market are arranged in the back-end ductwork, bring following technological deficiency in boiler manufacturing, installation and in using:
1, adopts traditional arrangement form of the prior art, because CFBB is originally as low-temperature burning, flue gas flow to back-end ductwork temperature lower (about 600 ℃), if want to obtain the superheated steam (〉=400 ℃) of higher temperature this moment, because temperature and pressure are less, the superheater surface of boiler will be very huge so, and this will improve the manufacturing and the installation cost of boiler greatly;
2, adopt traditional arrangement form of the prior art, can not effectively promote, low-temperature burning and desulphurization reaction can not effectively reduce the NOx discharging repeatedly;
Summary of the invention
Technical scheme provided by the invention technical problem to be solved is, adopt traditional arrangement form of the prior art, because CFBB is originally as low-temperature burning, flue gas flow to back-end ductwork temperature lower (about 600 ℃), if want to obtain the superheated steam (〉=400 ℃) of higher temperature this moment, because temperature and pressure are less, the superheater surface of boiler will be very huge so, and this will improve the manufacturing and the installation cost of boiler greatly; Simultaneously can not promote effectively that low-temperature burning and desulphurization reaction can not effectively reduce technical problems such as NOx discharging, and a kind of circulating fluidized bed boiler is provided repeatedly.
For solving the problems of the technologies described above, design concept of the present invention is, with the high temperature superheater that is arranged in the prior art in the back-end ductwork, to have position now is optimized, design high temperature superheater is arranged in technical scheme in the burner hearth, simultaneously, solve owing to changed the layout environment, the high temperature in the burner hearth is to the influence of high temperature superheater.Thereby another object of the present invention is a structure of having optimized high temperature superheater.
Technical scheme provided by the present invention is, a kind of circulating fluidized bed boiler, comprise burner hearth, be arranged on the furnace outlet of upper furnace, be arranged on fin panel casing in the burner hearth and the back-end ductwork that links to each other with described furnace outlet, be provided with high temperature superheater in the described burner hearth.
The top of described burner hearth is arranged, is fixed on to described high temperature superheater, and described high temperature superheater extends in burner hearth, and the height of described extension surpasses the height of described furnace outlet.
Described high temperature superheater transverse pitch is pressed the boiler furnace degree of depth and is evenly arranged some, and every is arranged in parallel.
Described high temperature superheater transverse pitch is pressed the boiler furnace degree of depth and is evenly arranged 21, every parallel connection 3 covers.
The described high temperature superheater described fin panel casing top that is arranged in through walls.
Described high temperature superheater comprises superheater tube, the alloy pipe of the The selection of pipe 12Cr1MoVG/GB5310 of described superheater tube.
Described superheater tube specification adopts φ 42 * 5, and the interior high-temperature steam flow velocity design of described, superheater tube pipe is more than 24 meter per seconds.
Pipe elbow, described superheater tube bottom is provided with the abrasionproof cover.
Described abrasionproof cover is selected the steel plate welding fabrication of t=8mm for use.
Described abrasionproof cover material is selected 1Cr20Ni14Si2 for use.
Adopt technical scheme provided by the present invention, can effectively solve the traditional arrangement form of the prior art that adopts, because CFBB is originally as low-temperature burning, flue gas flow to back-end ductwork temperature lower (about 600 ℃), if want to obtain the superheated steam (〉=400 ℃) of higher temperature this moment, because temperature and pressure are less, the superheater surface of boiler will be very huge so, and this will improve the manufacturing and the installation cost of boiler greatly; Simultaneously can not promote effectively that low-temperature burning and desulphurization reaction can not effectively reduce technical problems such as NOx discharging repeatedly, simultaneously, it is little that the present invention also has manufacturing cost, sulfuration efficient height, characteristics such as long service life.
Description of drawings
In conjunction with the accompanying drawings, the present invention is described further:
Fig. 1 is a structural representation of the present invention;
Wherein, 1 is burner hearth; 2 is furnace outlet; 3 is high temperature superheater.
The specific embodiment
Structure brief introduction of the present invention:
Concentration of solid particles is higher in the burner hearth 1 interior flue gas, but the flow of flue gas direction is stable, gets final product so only need add the abrasionproof cover in pipe elbow, bottom, and the abrasionproof cover is selected the steel plate welding fabrication of t=8mm for use, weld seam need adopt the full penetration structure, prevents that thermal (temperature difference) stress from causing tear failure.The abrasionproof cover material is selected 1Cr20Ni14Si2 for use, and resistance to elevated temperatures is superior.
For solving traditional arrangement form of the prior art, because CFBB is originally as low-temperature burning, flue gas flow to back-end ductwork temperature lower (about 600 ℃), if want to obtain the superheated steam (〉=400 ℃) of higher temperature this moment, because temperature and pressure are less, the superheater surface of boiler will be very huge so, and this will improve the manufacturing and the installation cost of boiler greatly; Can not effectively promote simultaneously, low-temperature burning and desulphurization reaction repeatedly, can not effectively reduce technical problems such as NOx discharging, design concept of the present invention is with the high temperature superheater 3 that is arranged in the prior art in the back-end ductwork, will have position now and be optimized, design high temperature superheater 3 is arranged in technical scheme in the burner hearth 1, simultaneously, solve owing to changed the layout environment, the high temperature in the burner hearth 1 is to the influence of high temperature superheater 3.Thereby another object of the present invention is a structure of having optimized high temperature superheater 3
As shown in Figure 1, concrete technical scheme provided by the present invention is, a kind of circulating fluidized bed boiler, comprise burner hearth 1, be arranged on the furnace outlet 2 on burner hearth 1 top, be arranged on fin panel casing in the burner hearth 1 and the back-end ductwork that links to each other with described furnace outlet 2, be provided with high temperature superheater 3 in the described burner hearth 1.The top of described burner hearth 1 is arranged, is fixed on to described high temperature superheater 3, and described high temperature superheater 3 extends in burner hearth 1, and the height of described extension surpasses the height of described furnace outlet 2.Described high temperature superheater 3 transverse pitches are pressed boiler furnace 1 degree of depth and are evenly arranged some, and every is arranged in parallel.Described high temperature superheater 3 transverse pitches are pressed boiler furnace 1 degree of depth and are evenly arranged 21, every parallel connection 3 covers.The described high temperature superheater 3 described fin panel casing tops that are arranged in through walls.Described high temperature superheater 3 comprises superheater tube, the alloy pipe of the The selection of pipe 12Cr1MoVG/GB5310 of described superheater tube.Described superheater tube specification adopts φ 42 * 5, and the interior high-temperature steam flow velocity design of described, superheater tube pipe is more than 24 meter per seconds.Pipe elbow, described superheater tube bottom is provided with the abrasionproof cover.Described abrasionproof cover is selected the steel plate welding fabrication of t=8mm for use.Described abrasionproof cover material is selected 1Cr20Ni14Si2 for use.
Claims (10)
1. circulating fluidized bed boiler, comprise burner hearth (1), be arranged on the furnace outlet (2) on burner hearth (1) top, be arranged in the burner hearth (1) fin panel casing and with described furnace outlet (2 back-end ductworks that link to each other is characterized in that, described burner hearth (is provided with high temperature superheater (3) in 1.
2. a kind of circulating fluidized bed boiler according to claim 1, it is characterized in that, the top of described burner hearth (1) is arranged, is fixed on to described high temperature superheater (3), and described high temperature superheater (3) extends in burner hearth (1), and the height of described extension surpasses the height of described furnace outlet (2).
3. a kind of circulating fluidized bed boiler according to claim 1 and 2 is characterized in that, described high temperature superheater (3) transverse pitch is evenly arranged some by boiler furnace (1) degree of depth, and every is arranged in parallel.
4. a kind of circulating fluidized bed boiler according to claim 3 is characterized in that, described high temperature superheater (3) transverse pitch is evenly arranged 21 by boiler furnace (1) degree of depth, every parallel connection (3) cover.
5. a kind of circulating fluidized bed boiler according to claim 4 is characterized in that, described high temperature superheater (3) the described fin panel casing top that is arranged in through walls.
6. according to claim 4 or 5 described a kind of circulating fluidized bed boilers, it is characterized in that described high temperature superheater (3) comprises superheater tube, the alloy pipe of the The selection of pipe 12Cr1MoVG/GB5310 of described superheater tube.
7. a kind of circulating fluidized bed boiler according to claim 6 is characterized in that, described superheater tube specification adopts φ 42 * 5, and the interior high-temperature steam flow velocity design of described, superheater tube pipe is more than 24 meter per seconds.
8. a kind of circulating fluidized bed boiler according to claim 7 is characterized in that, pipe elbow, described superheater tube bottom is provided with the abrasionproof cover.
9. a kind of circulating fluidized bed boiler according to claim 8 is characterized in that, described abrasionproof cover is selected the steel plate welding fabrication of t=8mm for use.
10. a kind of circulating fluidized bed boiler according to claim 8 is characterized in that, described abrasionproof cover material is selected 1Cr20Ni14Si2 for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010295366 CN101943395A (en) | 2010-09-26 | 2010-09-26 | Circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010295366 CN101943395A (en) | 2010-09-26 | 2010-09-26 | Circulating fluidized bed boiler |
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| Publication Number | Publication Date |
|---|---|
| CN101943395A true CN101943395A (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010295366 Pending CN101943395A (en) | 2010-09-26 | 2010-09-26 | Circulating fluidized bed boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287683A (en) * | 2016-08-31 | 2017-01-04 | 江苏汇能锅炉有限公司 | Circulating fluid-bed coal-burning boiler coal economizer energy-conserving reconstruction method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668713A (en) * | 1979-11-09 | 1981-06-09 | Kawasaki Heavy Ind Ltd | Fluidized incinerator for mixed combustion of coal and refuse |
| CN2412647Y (en) * | 2000-02-08 | 2001-01-03 | 郑向阳 | Shell type internal circulation fluidized-bed boiler |
| JP2003120901A (en) * | 2001-10-15 | 2003-04-23 | Mitsubishi Heavy Ind Ltd | Through flow exhaust heat boiler |
| CN2711540Y (en) * | 2004-06-12 | 2005-07-20 | 唐山信德锅炉制造有限公司 | Low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler |
| CN2735183Y (en) * | 2004-08-03 | 2005-10-19 | 神华集团有限责任公司 | Vulcanized bed boiler |
| CN2854351Y (en) * | 2005-08-31 | 2007-01-03 | 西安热工研究院有限公司 | Firepot of circulation fluidized bed boiler with anti-wear device |
| CN2888281Y (en) * | 2006-04-30 | 2007-04-11 | 唐山信德锅炉集团有限公司 | Middle temperature separation circulating fluidized bed hot water boiler |
| CN101021318A (en) * | 2006-02-16 | 2007-08-22 | 山东兖矿国际焦化有限公司 | New process for solving coking problem of small and medium-sized circulating fluidized bed boiler |
| CN101672472A (en) * | 2009-08-28 | 2010-03-17 | 无锡海源重工股份有限公司 | Boiler space separating and feeding back device of industrial circulating fluidized bed boiler |
| CN201852077U (en) * | 2010-09-26 | 2011-06-01 | 安徽金鼎锅炉股份有限公司 | Circulating fluidized bed boiler |
-
2010
- 2010-09-26 CN CN 201010295366 patent/CN101943395A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668713A (en) * | 1979-11-09 | 1981-06-09 | Kawasaki Heavy Ind Ltd | Fluidized incinerator for mixed combustion of coal and refuse |
| CN2412647Y (en) * | 2000-02-08 | 2001-01-03 | 郑向阳 | Shell type internal circulation fluidized-bed boiler |
| JP2003120901A (en) * | 2001-10-15 | 2003-04-23 | Mitsubishi Heavy Ind Ltd | Through flow exhaust heat boiler |
| CN2711540Y (en) * | 2004-06-12 | 2005-07-20 | 唐山信德锅炉制造有限公司 | Low circulation multiplying factor low smoke speed intermediate temperature separation circulating fluidized bed boiler |
| CN2735183Y (en) * | 2004-08-03 | 2005-10-19 | 神华集团有限责任公司 | Vulcanized bed boiler |
| CN2854351Y (en) * | 2005-08-31 | 2007-01-03 | 西安热工研究院有限公司 | Firepot of circulation fluidized bed boiler with anti-wear device |
| CN101021318A (en) * | 2006-02-16 | 2007-08-22 | 山东兖矿国际焦化有限公司 | New process for solving coking problem of small and medium-sized circulating fluidized bed boiler |
| CN2888281Y (en) * | 2006-04-30 | 2007-04-11 | 唐山信德锅炉集团有限公司 | Middle temperature separation circulating fluidized bed hot water boiler |
| CN101672472A (en) * | 2009-08-28 | 2010-03-17 | 无锡海源重工股份有限公司 | Boiler space separating and feeding back device of industrial circulating fluidized bed boiler |
| CN201852077U (en) * | 2010-09-26 | 2011-06-01 | 安徽金鼎锅炉股份有限公司 | Circulating fluidized bed boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287683A (en) * | 2016-08-31 | 2017-01-04 | 江苏汇能锅炉有限公司 | Circulating fluid-bed coal-burning boiler coal economizer energy-conserving reconstruction method |
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Application publication date: 20110112 |