CN101219357A - circulating fluidized bed system with multi-stage material return - Google Patents
circulating fluidized bed system with multi-stage material return Download PDFInfo
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- CN101219357A CN101219357A CNA2007100633697A CN200710063369A CN101219357A CN 101219357 A CN101219357 A CN 101219357A CN A2007100633697 A CNA2007100633697 A CN A2007100633697A CN 200710063369 A CN200710063369 A CN 200710063369A CN 101219357 A CN101219357 A CN 101219357A
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- 239000000463 material Substances 0.000 title claims abstract description 102
- 239000007787 solid Substances 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 230000019771 cognition Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
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Abstract
The invention provides a multi-grade feed-returning circulation fluidized bed system which relates to a fluidized bed technology, formed by connecting a main bed, a separator and return feeders in sequence Wherein, two or more than two return feeders are connected along the direction of the height in series, namely, a solid outlet pipe at the bottom of the separator is connected with a descending section of the return feeder at the top part. An outlet pipe of the return feeder is connected with a descending section of the return feeder under the former return feeder, and an outlet pipe of the return feeder at the lowest part is connected with the lower part of the main bed; except for the return feeder at the lowest part, the top part of the ascending sections of each return feeder is provided with a pressure balance pipes that are communicated with the main bed. The invention adopts the multi-grade return feeders connected in series to solve the problems of feed-returning clog of the circulation fluidized bed system, gas flee of the main bed, etc. when the material-sealing resistance provided by the single-grade return feeder is smaller compared with pressure difference at the bottom of the main bed and the separator. The invention can be applied to the occasions such as conveying materials with large pressure difference, circulation systems of low-density materials, and so on.
Description
Technical field
The present invention relates to a kind of circulating fluidized bed technique field, particularly a kind of circulating fluidized bed system with the multi-stage material return device.
Background technology
Usually, circulating fluidized bed system is made up of main bed, separator, material returning device, and material circulates in the closed circuit that this three constitutes.The effect of material returning device is that material is transported to the higher main bed bottom of pressure from the lower separator bottom of pressure.
Descending branch and ascent stage that material returning device commonly used is communicated by the bottom, and the outlet that links to each other with ascent stage top is formed, descending branch and ascent stage bottom feed fluidizing gas, material forms the material envelope in material returning device, make material returning device material can be transported to the higher-pressure region from low-pressure area, the gas anti-channeling that prevents the higher-pressure region simultaneously goes into to be in the separator bottom of low-pressure area.
Yet, in some circulating fluidized bed system, pressure reduction between main bed bottom and the separator bottom may be far above the level of routine, very high such as the material concentration in very high when main bed height or the main bed, also may be because the recycle stock in the system is special, such as material density hour, formed material is blockaded power with respect to pressure reduction between main bed bottom and the separator bottom and Yan Huitai is little in material returning device, and single material returning device will be difficult to play the above-mentioned effect of returning material and preventing gas blowby this moment.
Summary of the invention
The circulating fluidized bed system that the purpose of this invention is to provide a kind of multi-stage material return, it is very big to be used for the pressure reduction of main bed between bottom separator, or the single material returning device material that can the provide less relatively situation of power of blockading.
The circulating fluidized bed system technical scheme of multi-stage material return of the present invention is:
A kind of circulating fluidized bed system of multi-stage material return, be connected in sequence by main bed (1), separator (2), material returning device, its described material returning device is two or more, connect successively along short transverse, be that separator bottom solid outlet pipe links to each other with material returning device (31) descending branch of the top, this material returning device (31) outlet links to each other with the descending branch of material returning device (32) of its below, and the outlet of the material returning device (33) of below links to each other with a bottom of leading bed (1); Except that the material returning device (33) of below, the ascent stage top of each material returning device (31,32) is respectively equipped with the pressure-equalizing pipe (310,320) that communicates with main bed (1).
The circulating fluidized bed system of described multi-stage material return, identical, the equal and opposite in direction of its described each material returning device (31,32,33) structure.
The circulating fluidized bed system of described multi-stage material return, its described pressure-equalizing pipe (310,320) inserts main bed (1) and locates to be the pressure Along ent, solid outlet pipe (201) pressure is poor bottom promptly main bed returning charge mouth (303) pressure and the separator, carries out the pairing point of five equilibrium by the material returning device number of being connected; The pressure-equalizing pipe (310) that is to say separator bottom solid outlet pipe (201) and the material returning device (31) of the top inserts pressure-equalizing pipe (320) that pressure reduction=two neighbouring material returning device pressure-equalizing pipes between the main bed place (301) insert the pressure reduction=below penult material returning device (32) between the main bed place (301,302) and inserts pressure reduction between main bed place (302) and the master's returning charge mouth (303).
Characteristics of the present invention are:
The present invention adopts the series connection of multi-stage material return device, the material that having solved the single-stage material returning device can provide is blockaded power with respect under the less situation of main bed pressure reduction, problems such as not smooth, the main bed gas of circulating fluidized bed system returning charge anti-channeling, the High Pressure Difference that can be used for material is carried, the occasions such as the circulatory system of case of low density loads.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
The specific embodiment
The circulating fluidized bed system of multi-stage material return of the present invention, be in turn connected to form closed circuit by main bed, separator, material returning device, wherein, material returning device is two or more, connect successively along short transverse, be that separator outlet at bottom pipe links to each other with the material returning device descending branch of the top, this material returning device outlet links to each other with the descending branch of material returning device of its below, and the outlet of the material returning device of below links to each other with main bottom; Except that the material returning device of below, the ascent stage top of each material returning device is provided with and a main pressure-equalizing pipe that communicates.
Above-mentioned two or more material returning devices, identical, the equal and opposite in direction of structure.
The above-mentioned main bed of pressure-equalizing pipe access place is the pressure Along ent, and promptly master's bed returning charge mouth pressure and separator bottom solid outlet pipe pressure is poor, carries out the pairing point of five equilibrium by the material returning device number of being connected; The pressure-equalizing pipe that is to say separator bottom solid outlet pipe and the material returning device of the top inserts pressure-equalizing pipe that pressure reduction=two neighbouring material returning device pressure-equalizing pipes between the main bed place insert the pressure reduction=below penult material returning device between the main bed place and inserts pressure reduction between main bed place and the master's returning charge mouth.
Principle of the present invention is:
The present invention adopts multi-stage material return device series connection, the material returning device material power stack of blockading, thus can with main bed pressure reduction coupling, make material can pass through the multi-stage material return device, be transported to the higher-pressure region and prevent that higher-pressure region gas anti-channeling from going into separator from low-pressure area.
During the single-stage returning charge, the fluidized gas of material returning device cognition enters main bed with solid material; And for multi-stage material return, the outlet of upper level material returning device can link to each other with the descending branch of next stage, and the material in the descending branch is the moving bed that gas is difficult to pass, and therefore pressure-equalizing pipe need be set, and the fluidizing gas of material returning device is introduced main bed.
Be simplified design, can adopt identical, the equal-sized material returning device of a plurality of structures; The operting differential pressure of each material returning device also can be designed to identical, promptly adopts the mode of pressure five equilibrium, and each material returning device descending branch inlet is equated with pressure reduction between the outlet.
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, the circulating fluidized bed system of multi-stage material return, be connected in sequence by main bed 1, separator 2, three identical, equal-sized material returning devices 31,32,33 of structure along the short transverse series connection: separator 2 bottom solid outlet pipes 201 link to each other with material returning device 31 descending brancies of the top, these material returning device 31 outlets link to each other with the descending branch of the material returning device 32 of centre, the outlet of middle material returning device 32 links to each other with the descending branch of the material returning device 33 of below again, this outlet of the material returning device 33 of below link to each other with main 1 bottom.
The ascent stage top of the material returning device 31 of the top and middle material returning device 32 is equipped with and main bed 1 pressure-equalizing pipe that communicates 310,320.It is main bed returning charge mouth 303 pressure and the trisection point of the difference of separator 2 bottom solid outlet pipe 201 pressure that this two pressure-equalizing pipes 310,320 insert main bed place 301,302, the pressure-equalizing pipe 320 that the material returning device 31 that the pressure-equalizing pipe 310 that is to say the material returning device 31 of separator 2 bottom solid outlet pipes 201 and the top inserts the pressure reduction=the top between the main bed place 301 and the pressure-equalizing pipe 310,320 of middle material returning device 32 insert the pressure reduction=middle material returning device 32 between the main bed place 301,302 insert main bed locate 302 and master's returning charge mouth 303 between pressure reduction.
Claims (3)
1. the circulating fluidized bed system of multi-stage material return, be connected in sequence by main bed (1), separator (2), material returning device, it is characterized in that: described material returning device is two or more, connect successively along short transverse, be that separator bottom solid outlet pipe links to each other with material returning device (31) descending branch of the top, this material returning device (31) outlet links to each other with the descending branch of material returning device (32) of its below, and the outlet of the material returning device (33) of below links to each other with a bottom of leading bed (1); Except that the material returning device (33) of below, the ascent stage top of each material returning device (31,32) is respectively equipped with the pressure-equalizing pipe (310,320) that communicates with main bed (1).
2. by the circulating fluidized bed system of the described multi-stage material return of claim 1, it is characterized in that identical, the equal and opposite in direction of described each material returning device (31,32,33) structure.
3. press the circulating fluidized bed system of claim 1 or 2 described multi-stage material returns, it is characterized in that, described pressure-equalizing pipe (310,320) inserts main bed (1) and locates to be the pressure Along ent, solid outlet pipe (201) pressure is poor bottom promptly main bed returning charge mouth (303) pressure and the separator, carries out the pairing point of five equilibrium by the material returning device number of being connected; The pressure-equalizing pipe (310) that is to say separator bottom solid outlet pipe (201) and the material returning device (31) of the top inserts pressure-equalizing pipe (320) that pressure reduction=two neighbouring material returning device pressure-equalizing pipes between the main bed place (301) insert the pressure reduction=below penult material returning device (32) between the main bed place (301,302) and inserts pressure reduction between main bed place (302) and the master's returning charge mouth (303).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100633697A CN100528324C (en) | 2007-01-10 | 2007-01-10 | circulating fluidized bed system with multi-stage material return |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100633697A CN100528324C (en) | 2007-01-10 | 2007-01-10 | circulating fluidized bed system with multi-stage material return |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101219357A true CN101219357A (en) | 2008-07-16 |
| CN100528324C CN100528324C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100633697A Expired - Fee Related CN100528324C (en) | 2007-01-10 | 2007-01-10 | circulating fluidized bed system with multi-stage material return |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986030B (en) * | 2009-07-29 | 2012-10-03 | 中国科学院工程热物理研究所 | Material circulating device with sorting function |
| CN103423737A (en) * | 2012-05-25 | 2013-12-04 | 中国科学院工程热物理研究所 | Circulating fluidized bed system having pneumatic control distributing valve, and circulating fluidized bed loop system |
| CN105413594A (en) * | 2014-09-23 | 2016-03-23 | 中国科学院工程热物理研究所 | Multi-stage feedback circulating fluidized bed system with pressure equalizing apparatus |
| CN113877490A (en) * | 2021-11-01 | 2022-01-04 | 中国科学院工程热物理研究所 | Fluidized bed reactor and method for treating materials by using same |
| CN114135893A (en) * | 2021-10-25 | 2022-03-04 | 国家能源集团国源电力有限公司 | Material returning device and boiler |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2563119B1 (en) * | 1984-04-20 | 1989-12-22 | Creusot Loire | PROCESS FOR THE CIRCULATION OF SOLID PARTICLES WITHIN A FLUIDIZATION CHAMBER AND IMPROVED FLUIDIZATION CHAMBER FOR IMPLEMENTING THE METHOD |
| JPH03213903A (en) * | 1990-01-19 | 1991-09-19 | Nkk Corp | Burner for circulating fluidized-bed combustion with particle crusher |
| FI89074C (en) * | 1991-12-03 | 1993-08-10 | Ahlstroem Oy | FOER REFRIGERATION FOER FOERGASNING ELLER FOERBRAENNING AV FAST KOLHALTIGT MATERIAL |
| CN2192806Y (en) * | 1994-04-20 | 1995-03-22 | 开封锅炉厂 | Outer circulation fluidzing bed boiler |
| CN1563791A (en) * | 2004-04-06 | 2005-01-12 | 无锡华光锅炉股份有限公司 | High pressure air clearing method for treating fault of feedback appts. of circulation fluidized bed boiler |
-
2007
- 2007-01-10 CN CNB2007100633697A patent/CN100528324C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986030B (en) * | 2009-07-29 | 2012-10-03 | 中国科学院工程热物理研究所 | Material circulating device with sorting function |
| CN103423737A (en) * | 2012-05-25 | 2013-12-04 | 中国科学院工程热物理研究所 | Circulating fluidized bed system having pneumatic control distributing valve, and circulating fluidized bed loop system |
| CN103423737B (en) * | 2012-05-25 | 2016-09-14 | 中国科学院工程热物理研究所 | Circulating fluidized bed system with pneumatic control distributing valve and the circuit system of recirculating fluidized bed |
| CN105413594A (en) * | 2014-09-23 | 2016-03-23 | 中国科学院工程热物理研究所 | Multi-stage feedback circulating fluidized bed system with pressure equalizing apparatus |
| CN105413594B (en) * | 2014-09-23 | 2017-10-27 | 中国科学院工程热物理研究所 | Multi-stage material return circulating fluidized bed system with pressure equaliser |
| CN114135893A (en) * | 2021-10-25 | 2022-03-04 | 国家能源集团国源电力有限公司 | Material returning device and boiler |
| CN114135893B (en) * | 2021-10-25 | 2024-04-12 | 国家能源集团国源电力有限公司 | Material returning device and boiler |
| CN113877490A (en) * | 2021-11-01 | 2022-01-04 | 中国科学院工程热物理研究所 | Fluidized bed reactor and method for treating materials by using same |
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| Publication number | Publication date |
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| CN100528324C (en) | 2009-08-19 |
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