CN102840576A - Circulating fluidized bed boiler with independent internal and external circulating fluidized bed heat exchangers - Google Patents
Circulating fluidized bed boiler with independent internal and external circulating fluidized bed heat exchangers Download PDFInfo
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- CN102840576A CN102840576A CN2011101699147A CN201110169914A CN102840576A CN 102840576 A CN102840576 A CN 102840576A CN 2011101699147 A CN2011101699147 A CN 2011101699147A CN 201110169914 A CN201110169914 A CN 201110169914A CN 102840576 A CN102840576 A CN 102840576A
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- 239000002245 particle Substances 0.000 claims abstract description 36
- 239000007787 solid Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 12
- 230000002459 sustained effect Effects 0.000 claims description 5
- 239000002893 slag Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract 1
- 239000003546 flue gas Substances 0.000 abstract 1
- 238000005243 fluidization Methods 0.000 description 7
- 239000000839 emulsion Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 125000004122 cyclic group Chemical group 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000003134 recirculating effect Effects 0.000 description 3
- 230000001464 adherent effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000013341 scale-up Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention discloses a circulating fluidized bed boiler with independent internal and external circulating fluidized bed heat exchangers. The invention relates to a large-scale fluidized bed technology. The circulating fluidized bed boiler comprises a wind chamber used for providing fluidizing wind, a hearth, a cyclone separator connected to an upper-part flue gas outlet of the hearth, an external circulating fluidized bed heat exchanger connected to a return-feeder and a dense-phase region at the bottom of the hearth, and an internal circulating fluidized bed heat exchanger closely integrated up and down with the external circulating fluidized bed heat exchanger. With the circulating fluidized bed boiler with the independent internal and external circulating fluidized bed heat exchangers provided by the invention, according to steam parameter requirements of each heat exchange chamber, heat-exchanging powers of the heat exchange chambers can be adjusted and controlled through independent fluidizing wind; with close-wall high-temperature particle flows in the hearth dense-phase region and hearth-bottom slag heat, higher-grade steam parameter requirements of the circulating fluidized bed boiler can be satisfied.
Description
Technical field
The present invention relates to large-size circulating fluidized bed technology, particularly the large circulating fluidized bed boiler technology.
Background technology
Raising along with CFBB capacity and steam parameter; The unbalanced increase of heat release and heat absorption will cause the Layout Problem of heating surface in the stove; Effectively solution is exactly to arrange external heat exchanger at main circulation loop at present, and one side by transferring in the stove outside the stove, efficiently solves heating surface heating surface is placed sealing, expansion and wear problem in the burner hearth; Increased the operation regulating measure of bed temperature and steam temperature on the other hand, made boiler adapt to the varying load condition requirement more easily.Lurgi and Alstom company use external heat exchanger to solve the not enough problem of heating surface; But it is high to regulate the grey control valve requirement on machining accuracy that gets into the external heat exchanger circulating ash quantity; And main dependence on import; Cost an arm and a leg, this brings certain difficulty for the maintenance and the cost of investment of external heat exchanger.Chinese patent CN00238546.5 discloses a kind of outer circulation compact splitting-type returning ash heat exchanger that is applied to large circulating fluidized bed boiler; Regulate high temperature and return ash amount and low temperature and return the ratio of ash between measuring through regulating the fluidisation air quantity; But only adopt single external circulation fluidized bed heat exchanger, make demand receive certain restriction the elevated steam conditions grade.
When the Boiler Steam parameter reaches higher parameter grade; Like supercritical parameter 460MW (27.5MPa/560/580 ℃) or ultra supercritical parameter 800MW (30.9MPa/604/621 ℃); If still adopt conventional single external external circulation fluidized bed heat exchanger can't satisfy the requirement of elevated steam conditions grade, need the novel external fluid-bed heat exchanger of design this moment.In order further to improve the Boiler Steam parameter; International monopoly WO2007/128883 discloses a kind of fluidized bed exchanger and the CFBB with fluidized bed exchanger that is used for CFBB; Two heat-exchanging chambers of in main circulation loop, connecting up and down; Utilize the heat of inside and outside solid circle particle to obtain higher steam parameter; This heat exchanger arrangement is that Scale-up of Circulating Fluidized Bed Boiler provides advantage; But through the cryogenic particles after the heat exchange of first order outer circulation Heat Room with promptly get into second level Heat Room after the high-temperature particle that gets into from burner hearth bottom does not fully mix, this will cause in the Heat Room of the second level diverse location place owing to the heat exchange inequality causes the problem that thermal deviation is big.
Summary of the invention
The purpose of this invention is to provide a kind of CFBB with external circulation fluidized bed heat exchanger in independent; To overcome the deficiency of existing external fluid-bed heat exchanger; Make full use of that the heat of slag satisfies more high-grade steam parameter requirement at the bottom of inside and outside cyclic high-temperature solid particle and the burner hearth, for Scale-up of Circulating Fluidized Bed Boiler and high parameter development provide a kind of close-coupled novel furnace structure.
For achieving the above object, technical solution of the present invention is following:
A kind of CFBB with external circulation fluidized bed heat exchanger in independent; Comprise successively the burner hearth 2 that connects, cyclone separator 3, the back-end ductwork that is connected with cyclone separator 3 exhanst gas outlets; And the material returning device 4 that is connected with cyclone separator 3 solid outlets; Wherein burner hearth 2 bottoms are provided with air compartment 1, and it also comprises at least one external circulation fluidized bed heat exchanger 6 and an ICFB heat exchanger 7
External circulation fluidized bed heat exchanger 6 comprises: premixer 61 and Heat Room 63; 61 bottoms, premixer are provided with air compartment 6 "; Heat Room 63 bottoms be provided with air compartment 6 ', be provided with heat-exchanging tube bundle 64 in it;
ICFB heat exchanger 7 comprises: Heat Room 73 and solid particle returning charge passage 71 '; Heat Room 73 bottoms be provided with air compartment 7 ', be provided with heat-exchanging tube bundle 74 in it; Institute solid particle returning charge passage 71 ' bottom is provided with air compartment 7 ";
The CFBB of external circulation fluidized bed heat exchanger in described band is independent; Its 61 tops, said premixer are communicated with burner hearth 2 through charging aperture 23; Charging aperture 23 is in tilted layout by burner hearth 2 side direction premixers 61 sides from top to bottom, and tilt angle alpha is 15 °～60 °.
The CFBB of external circulation fluidized bed heat exchanger in described band is independent, its said charging aperture 23 is close to inboard wall of burner hearth and is arranged that to the downward-sloping layout of burner hearth center position, downtilt angles β is 10 °～45 ° by burner hearth sidewall in charging aperture 23 upper surfaces.
The CFBB of external circulation fluidized bed heat exchanger in described band is independent; It also comprises solid particle feeding-passage 71; Described solid particle feeding-passage 71 upper surfaces and burner hearth air distribution plate 25 upper end surfaces are in the sustained height level; The bottom is furnished with grain sorting slag-draining device 75, and the bottom is communicated with Heat Room 73 through through hole 72.
The CFBB of external circulation fluidized bed heat exchanger in described band is independent; Its also comprise solid particle returning charge passage 61 '; Solid particle returning charge passage 61 ' bottom is provided with air compartment 6 ", be communicated with Heat Room 63 through bottom through-hole 62, be communicated with burner hearth 2 through top overfall 21.
The CFBB of external circulation fluidized bed heat exchanger in described band is independent; Its said external circulation fluidized bed heat exchanger 6 premixers 61 or Heat Room 63 upper outside are provided with the crosswind pipe 65 of horizontal arrangement; Be furnished with bypass channel 66 on Heat Room 63 and returning charge passage 61 ' top; Through bypass channel 66 Heat Room 63 is communicated with returning charge passage 61 ' top, bypass channel 66 low end entrance centre-heights and crosswind pipe 65 centre-heights remain on the sustained height level.
The CFBB of external circulation fluidized bed heat exchanger in described band is independent, its said external circulation fluidized bed heat exchanger 6 is close to setting up and down with ICFB heat exchanger 7; Put external circulation fluidized bed heat exchanger 6 or ICFB heat exchanger 7 arbitrarily up.
Characteristics of the present invention are:
Compared with present technology; The CFBB of external circulation fluidized bed heat exchanger in band provided by the invention is independent; Through inside and outside recirculating fluidized bed Heat Room independently of one another and that arrange with the burner hearth close-coupled; Can realize the adjusting as required and the control of each Heat Room heat exchange power; Make full use of a large amount of adherent high-temperature particle stream and slag heat at the bottom of the burner hearth of burner hearth emulsion zone, can solve bed temperature and steam temperature stable problem under startup and the running on the lower load, can satisfy the requirement of large circulating fluidized bed boiler elevated steam conditions grade simultaneously.
Description of drawings
Fig. 1 is the section front elevational schematic of the CFBB embodiment 1 of the independent interior external circulation fluidized bed heat exchanger of band of the present invention;
Fig. 2 is the local enlarged diagram of CFBB embodiment 1 polycrystalline substance of the independent interior external circulation fluidized bed heat exchanger of band of the present invention;
Fig. 3 is the local enlarged diagram of CFBB embodiment 1 charging aperture 23 of the independent interior external circulation fluidized bed heat exchanger of band of the present invention;
Fig. 4 is the local enlarged diagram of CFBB embodiment 2 polycrystalline substances of the independent interior external circulation fluidized bed heat exchanger of band of the present invention;
Fig. 5 is the local enlarged diagram of CFBB embodiment 3 polycrystalline substances of the independent interior external circulation fluidized bed heat exchanger of band of the present invention.
The specific embodiment
Pass through embodiment below, and combine accompanying drawing, further bright specifically to technical scheme work of the present invention, in this manual, same or analogous drawing reference numeral is indicated same or analogous parts.
On the basis of the single external external circulation fluidized bed of routine heat exchanger; Utilize the high heat flux of recirculating fluidized bed to appear at the characteristics of burner hearth bottom emulsion zone, increased an independently external ICFB heat exchanger, come fully to reclaim the adherent grain flow heat of high temperature of burner hearth emulsion zone through external ICFB heat exchanger at the burner hearth bottom emulsion zone; The setting of two external fluid-bed heat exchangers; Heat exchange area is significantly increased, because a large amount of heating surface area makes more homogeneous of burner hearth bottom and head temperature by transferring in the stove outside the stove; Thereby improved the efficiency of combustion of burner hearth, reduced the emission level of pollutant.
External circulation fluidized bed heat exchanger and the operation independently of one another of ICFB heat exchanger, adjusting and control; There is the little shortcoming of temperature and pressure in second heat exchanger after having solved conventional two external fluid-bed heat exchanger arranged in series; Each fluidized bed heat exchanger chamber can be according to steam parameter requirement separately; Realize the independent circulating ash quantity allocation proportion that gets in the inside and outside recirculating fluidized bed Heat Room of external of regulating on demand; In wide load regulation range, reach the purpose of regulating bed temperature and steam temperature, the double-fluidized-bed heat exchanger system of whole external does not have any mechanical moving element and valve, has improved the stability and the reliability of system's operation.
Because the solid particle temperature that gets into the ICFB heat exchanger from the burner hearth bottom emulsion zone is more much higher than the outer circulation solid particle temperature that separates from cyclone separator; Thereby the ICFB heat exchanger can obtain high heat transfer rate in the small scale space; The vapor (steam) temperature parameter can obtain raising by a relatively large margin; Thereby promoted the heat-exchange capacity of fluid-bed heat exchanger under the different load, can satisfy more high-grade steam parameter requirement.
A large amount of high-temperature solid particles to burner hearth bottom; Sorting unit through the feeding-passage bottom carries out sorting to the bulky grain in the charging earlier; The large granular materials that sorts out cools off through roller slag cooler again, gets into through the fine grained after the sorting again and carries out heat exchange in the ICFB Heat Room.Make full use of the heat of slag at the bottom of the burner hearth, further improved the heat-exchange capacity of fluid-bed heat exchanger and the heat exchange efficiency of system.
The outer circulation low-temperature solid particle that separates from cyclone separator is introduced into to get into after the premixer is fully mixed with the high-temperature solid particle that gets into from the burner hearth bottom emulsion zone again and carries out heat exchange in the external circulation fluidized bed Heat Room, has solved the thermal deviation problem of introducing after outer circulation low-temperature solid particle and the heat exchange of the unmixed direct entering external circulation fluidized bed Heat Room of interior cyclic high-temperature solid particle.
Starting and between low-load period,, changing the interior cyclic high-temperature solid particle flow ratio that gets in the premixer, reach the purpose of regulating heat exchange power in the external circulation fluidized bed Heat Room through the adjusting of crosswind pipe and premixer's fluidisation air quantity.Under underload; Because outer circulation low-temperature solid grain flux is few; Therefore guarantee the steam parameter requirement in the external circulation fluidized bed Heat Room through cyclic high-temperature solid particle flow ratio in increasing, solved startup and the stable problem of steam temperature in the external circulation fluidized bed Heat Room between low-load period.
Between startup and low-load period; Through stopping or reducing the fluidized wind in the external circulation fluidized bed Heat Room; Increase crosswind pipe fluidized wind simultaneously, make the high-temperature solid particle that separates from cyclone separator not participate in or participate in less the heat exchange in the external circulation fluidized bed Heat Room, under the sidewall horizontal wind action; Directly return burner hearth through bypass channel or overfall by the returning charge passage, thereby guarantee that the burner hearth bed temperature maintains a higher level.In order to guarantee that whole heat exchanger tube is submerged in the high-temperature solid particle fully in running; Improving the heat exchange efficiency of heat exchanger, the bottom surface of the overfall of external circulation fluidized bed heat exchanger and ICFB heat exchanger returning charge passage height all is higher than the upper level of corresponding heat-exchanging tube bundle.
Below in conjunction with accompanying drawing and embodiment the present invention is done further description:
Referring to figs. 1 to Fig. 3; The CFBB of external circulation fluidized bed heat exchanger in band provided by the invention is independent; Comprise air compartment 1, burner hearth 2, the cyclone separator 3 that is connected with the upper furnace exhanst gas outlet, the material returning device 4 that is connected with cyclone separator 3, the external circulation fluidized bed heat exchanger 6 that is connected with material returning device 4 and burner hearth 2 bottom dense; Be close to the ICFB heat exchanger 7 that one is arranged up and down with external circulation fluidized bed heat exchanger 6; Boiler also comprises the back-end ductwork that is connected with cyclone separator 3 solid outlets in addition, does not illustrate in the drawings.
External circulation fluidized bed heat exchanger 6 is independently of one another with ICFB heat exchanger 7; 61 tops, external circulation fluidized bed heat exchanger 6 premixers are communicated with material returning device 5; Be communicated with burner hearth 2 through charging aperture 23 simultaneously, charging aperture 23 upper surface downtilt angles β are 20 °, and the charging aperture 23 feeding-passages angle [alpha] that has a down dip is 45 °; Premixer's 61 upper portion side wall are equipped with crosswind pipe 65; Crosswind pipe 65 is positioned at an outer circulation particle and a circulation material intersection, and 61 bottoms, premixer are communicated with Heat Room 63 through through hole 62, and Heat Room 63 tops are communicated with burner hearth 2 through overfall 21.ICFB heat exchanger 7 charging apertures 71 tops are communicated with burner hearth 2 through through hole 24; The bottom is communicated with Heat Room 73 through through hole 72; Charging aperture 71 upper surfaces and burner hearth air compartment 1 air distribution plate 25 maintain an equal level, and Heat Room 73 tops communicate with burner hearth 2 through overfall 22, are furnished with heat-exchanging tube bundle 64,74 in the Heat Room 63,73; External fluid- bed heat exchanger 6,7 can be arranged symmetrically in burner hearth left and right sides side wall, and it is one-sided or all around also can be arranged in burner hearth as required.
When the boiler oepration at full load; High-temperature particle that separates through cyclone separator 4 and the high-temperature particle that gets into from charging aperture 23 be 61 air compartments 6 in the premixer " fully mix the fluidized wind effect under; carry out heat exchange through bottom through-hole 62 entering Heat Rooms 63 and heat-exchanging tube bundle 64 again, and then under the effect of air compartment 6 ' fluidized wind, return burner hearth 2 through overfall 21; Slag at first carries out sorting through the sorting unit 75 of ICFB heat exchanger 7 feeding-passages 71 bottoms at the bottom of the burner hearth; Fine grained after sorting gets into Heat Room 73 through bottom through-hole 72 and carries out heat exchange with heat-exchanging tube bundle 74, and the particle after the heat exchange returns burner hearth 2 through top overfall 22 again.When boiler startup and underrun, increase crosswind pipe 65 fluidisation air quantity, stop or reducing air compartment 6 ', 6 " the fluidisation air quantity reduces the outer circulation particle that gets into heat exchange in the external circulation fluidized bed heat exchanger 6, to guarantee the stable of burner hearth bed temperature.
With reference to figure 4; The CFBB of external circulation fluidized bed heat exchanger in band provided by the invention is independent; Polycrystalline substance comprises the material returning device 4 that cyclone separator 3 is connected, the external circulation fluidized bed heat exchanger 6 that is connected with material returning device 4 and burner hearth 2 bottoms; Be close to the ICFB heat exchanger 7 that one is arranged up and down with external circulation fluidized bed heat exchanger 6; External circulation fluidized bed heat exchanger 6 returning charge passages 61 ' bottom is communicated with Heat Room 63 through through hole 62, and top is passed through overfall 21 and is communicated with burner hearth 2, and the bottom surface of overfall 21 through holes is positioned at the above position of Heat Room 63 heat-exchanging tube bundles, 64 upper surfaces; Be communicated with through bypass channel 66 with returning charge passage 61 ' top at Heat Room 63; The crosswind pipe 65 that horizontal arrangement is arranged in Heat Room 63 outsides, crosswind pipe 65 remains on the sustained height level with bypass channel 66 low side charging apertures, and the bottom surface of bypass channel 66 high-end outlets is positioned at the above position of end face of overfall 21 through holes.ICFB heat exchanger 7 Heat Rooms 73 tops are communicated with burner hearth 2 through charging aperture 23; The bottom is through through hole 72 and returning charge passage 71 ' be communicated with; Charging aperture 23 upper surface downtilt angles β are 30 °; Returning charge passage 71 ' is communicated with burner hearth 2 through top overfall 22, ICFB heat exchanger 7 air compartments 7 ', 7 " be close to layouts side by side with burner hearth air compartment 1.
During boiler operatiopn; Through regulate crosswind pipe 65 and air compartment 6 ', 6 ", 7 ', 7 " fluidized wind regulates the heat exchange power in external circulation fluidized bed heat exchanger 6 and the ICFB heat exchanger 7; When boiler startup and underrun; Increase crosswind pipe 65 fluidisation air quantity, stop or reducing air compartment 6 ', 6 " the fluidisation air quantity makes the outer circulation granule materials get into returning charge passages 61 ' return burner hearth 2 through bypass channel 66.
With reference to figure 5; The CFBB of external circulation fluidized bed heat exchanger in band provided by the invention is independent; Polycrystalline substance comprises the material returning device 4 that is connected with cyclone separator 3, the external circulation fluidized bed heat exchanger 6 that is connected with material returning device 4 and burner hearth 2 bottoms; Be close to the ICFB heat exchanger 7 that one is arranged up and down with external circulation fluidized bed heat exchanger 6; External circulation fluidized bed heat exchanger 6 returning charge passages 61 ' bottom is communicated with Heat Room 63 through through hole 62, and top is communicated with burner hearth 2 through overfall 21, is communicated with Heat Room 63 tops through overfall 67; The bottom surface of overfall 21 through holes is positioned at the above position of Heat Room 63 heat-exchanging tube bundles, 64 upper surfaces, and the bottom surface of overfall 67 through holes is positioned at the above position of end face of overfall 21 through holes.ICFB heat exchanger 7 Heat Rooms 73 tops are communicated with burner hearth 2 through charging aperture 23; The bottom is through through hole 72 and returning charge passage 71 ' be communicated with; Charging aperture 23 upper surface downtilt angles β are 45 °, returning charge passage 71 ' be communicated with burner hearth 2 through top overfall 22.
During boiler operatiopn; Through regulate air compartment 6 ', 6 ", 7 ', 7 " fluidized wind regulates the heat exchange power in external circulation fluidized bed heat exchanger 6 and the ICFB heat exchanger 7; When boiler startup and underrun; Stop or reducing air compartment 6 ' fluidisation air quantity, make the outer circulation granule materials through overfall 67 get into returning charge passages 61 ', " return burner hearth 2 through overfall 21 under the fluidized wind effect at air compartment 6 again.
Claims (7)
1. CFBB with external circulation fluidized bed heat exchanger in independent; Comprise successively the burner hearth (2) that connects, cyclone separator (3), the back-end ductwork that is connected with cyclone separator (3) exhanst gas outlet; And the material returning device (4) that is connected with cyclone separator (3) solid outlet; Wherein burner hearth (2) bottom is provided with air compartment (1), it is characterized in that:
Also comprise at least one an external circulation fluidized bed heat exchanger (6) and an ICFB heat exchanger (7);
External circulation fluidized bed heat exchanger (6) comprising: premixer (61) and Heat Room (63); Bottom, premixer (61) is provided with air compartment (6 "); Heat Room (63) bottom is provided with air compartment (6 '), is provided with heat-exchanging tube bundle (64) in it;
Heat Room (63) is communicated with premixer (61) through bottom through-hole (62), is communicated with burner hearth (2) through top overfall (21), and the bottom surface of overfall (21) is positioned at the above position of heat-exchanging tube bundle (64) upper surface;
ICFB heat exchanger (7) comprising: Heat Room (73) and solid particle returning charge passage (71 '); Heat Room (73) bottom is provided with air compartment (7 '), is provided with heat-exchanging tube bundle (74) in it; Institute's solid particle returning charge passage (71 ') bottom is provided with air compartment (7 ");
Heat Room (73) is communicated with solid particle returning charge passage (71 ') through bottom through-hole (72), is communicated with burner hearth (2) through top overfall (22), and the bottom surface of overfall (22) is positioned at the above position of heat-exchanging tube bundle (74) upper surface.
2. by the described CFBB of being with independent interior external circulation fluidized bed heat exchanger of claim 1; It is characterized in that; Top, said premixer (61) is communicated with burner hearth (2) through charging aperture (23); Charging aperture (23) is in tilted layout by burner hearth (2) side direction premixer (61) side from top to bottom, and tilt angle alpha is 15 °～60 °.
3. by the CFBB of claim 1 with the independent interior external circulation fluidized bed heat exchanger of 2 described bands; It is characterized in that; Said charging aperture (23) is close to inboard wall of burner hearth and is arranged; To the downward-sloping layout of burner hearth center position, downtilt angles β is 10 °～45 ° by burner hearth sidewall in charging aperture (23) upper surface.
4. by the described CFBB of being with independent interior external circulation fluidized bed heat exchanger of claim 1; It is characterized in that; Also comprise solid particle feeding-passage (71); Described solid particle feeding-passage (71) upper surface and burner hearth air distribution plate (25) upper end surface are in the sustained height level, and the bottom is furnished with grain sorting slag-draining device (75), and the bottom is communicated with Heat Room (73) through through hole (72).
5. by the described CFBB of being with independent interior external circulation fluidized bed heat exchanger of claim 1; It is characterized in that; Also comprise solid particle returning charge passage (61 '); Solid particle returning charge passage (61 ') bottom is provided with air compartment, and (6 ") are communicated with Heat Room (63) through bottom through-hole (62), are communicated with burner hearth (2) through top overfall (21).
6. by the CFBB of claim 1 with the independent interior external circulation fluidized bed heat exchanger of 5 described bands; It is characterized in that; Said external circulation fluidized bed heat exchanger (6) premixer (61) or Heat Room (63) upper outside are provided with the crosswind pipe (65) of horizontal arrangement; Be furnished with bypass channel (66) on Heat Room (63) and returning charge passage (61 ') top; Through bypass channel (66) Heat Room (63) is communicated with returning charge passage (61 ') top, low end entrance centre-height of bypass channel (66) and crosswind pipe (65) centre-height remain on the sustained height level.
7. by the CFBB of the independent interior external circulation fluidized bed heat exchanger of the described band of claim 1, it is characterized in that said external circulation fluidized bed heat exchanger (6) is close to setting up and down with ICFB heat exchanger (7); Put external circulation fluidized bed heat exchanger (6) or ICFB heat exchanger (7) arbitrarily up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110169914.7A CN102840576B (en) | 2011-06-23 | 2011-06-23 | With the CFBB of independent medial-lateral circulating fluidized bed heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110169914.7A CN102840576B (en) | 2011-06-23 | 2011-06-23 | With the CFBB of independent medial-lateral circulating fluidized bed heat exchanger |
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| Publication Number | Publication Date |
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| CN102840576A true CN102840576A (en) | 2012-12-26 |
| CN102840576B CN102840576B (en) | 2016-03-02 |
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| CN201110169914.7A Expired - Fee Related CN102840576B (en) | 2011-06-23 | 2011-06-23 | With the CFBB of independent medial-lateral circulating fluidized bed heat exchanger |
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Cited By (6)
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| CN103423738A (en) * | 2013-07-01 | 2013-12-04 | 中国华能集团清洁能源技术研究院有限公司 | Compact type circulating fluidized bed boiler for burning high sodium coal |
| CN104728834A (en) * | 2015-04-09 | 2015-06-24 | 张振华 | Circulating fluidized bed boiler reducing atmosphere combustion technology |
| CN105650629A (en) * | 2016-02-24 | 2016-06-08 | 东方电气集团东方锅炉股份有限公司 | Method for eliminating heat deviation of working medium of external heat exchanger |
| CN111536496A (en) * | 2020-04-21 | 2020-08-14 | 东南大学 | Pressurized oxygen-enriched combustion circulating fluidized bed boiler and method thereof |
| CN114135865A (en) * | 2021-12-20 | 2022-03-04 | 重庆大学 | High-temperature ash storage device and circulating fluidized bed boiler provided with same |
| CN114688546A (en) * | 2021-12-29 | 2022-07-01 | 浙江大学 | Hot ash returning flow control device and method capable of achieving lateral air distribution and achieving double adjustment of bed temperature and steam temperature |
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| CN103423738A (en) * | 2013-07-01 | 2013-12-04 | 中国华能集团清洁能源技术研究院有限公司 | Compact type circulating fluidized bed boiler for burning high sodium coal |
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| CN104728834B (en) * | 2015-04-09 | 2017-04-12 | 张振华 | Circulating fluidized bed boiler reducing atmosphere combustion technology |
| CN105650629A (en) * | 2016-02-24 | 2016-06-08 | 东方电气集团东方锅炉股份有限公司 | Method for eliminating heat deviation of working medium of external heat exchanger |
| CN111536496A (en) * | 2020-04-21 | 2020-08-14 | 东南大学 | Pressurized oxygen-enriched combustion circulating fluidized bed boiler and method thereof |
| CN114135865A (en) * | 2021-12-20 | 2022-03-04 | 重庆大学 | High-temperature ash storage device and circulating fluidized bed boiler provided with same |
| CN114135865B (en) * | 2021-12-20 | 2024-02-27 | 重庆大学 | High-temperature ash storage device and circulating fluidized bed boiler with same |
| CN114688546A (en) * | 2021-12-29 | 2022-07-01 | 浙江大学 | Hot ash returning flow control device and method capable of achieving lateral air distribution and achieving double adjustment of bed temperature and steam temperature |
| CN114688546B (en) * | 2021-12-29 | 2023-01-10 | 浙江大学 | Hot ash returning flow control device and method capable of achieving lateral air distribution and achieving double adjustment of bed temperature and steam temperature |
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| CN102840576B (en) | 2016-03-02 |
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Inventor after: Song Guoliang Inventor after: Sun Yunkai Inventor after: Wang Xiaofang Inventor after: Wang Haigang Inventor after: Wang Dongyu Inventor after: Lv Qinggang Inventor after: Gao Ming Inventor before: Song Guoliang Inventor before: Sun Yunkai Inventor before: Zhang Man Inventor before: Wang Xiaofang Inventor before: Wang Haigang Inventor before: Wang Dongyu Inventor before: Lv Qinggang Inventor before: Gao Ming |
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