CN101986030B - Material circulating device with sorting function - Google Patents
Material circulating device with sorting function Download PDFInfo
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- CN101986030B CN101986030B CN200910090131A CN200910090131A CN101986030B CN 101986030 B CN101986030 B CN 101986030B CN 200910090131 A CN200910090131 A CN 200910090131A CN 200910090131 A CN200910090131 A CN 200910090131A CN 101986030 B CN101986030 B CN 101986030B
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Abstract
The invention discloses a material circulating device with sorting function and relates to material circulating technology. The material circulating device comprises a non-mechanical valve and a sorter, wherein large particles with the grain size greater than that designed by the material circulating device are sorted by the sorter and are discharged through a dreg discharging pipe, and other particles enter the non-mechanical valve. The material circulating device with the sorting function is mainly used for sorting and discharging large-particle materials when large-particle materials with super-standard grain size are present in a circulating loop. Therefore, the smoothness of the material circulating is guaranteed.
Description
Technical field
The present invention relates to the material circulating technology, particularly a kind of material circulation device that is used for the recirculating fluidized bed closed circuit.
Background technology
Material circulation device is the critical component that constitutes the recirculating fluidized bed closed circuit.In the cyclic process of solid particle, the effect of material circulation device is that recycle stock is sent back in the riser continuously and stably, and prevent gas by the higher-pressure region anti-channeling to low-pressure area.The reliability of material circulation device work directly affects the normal and stable operation of recirculating fluidized bed.
Generally speaking, the material circulation device of recirculating fluidized bed can be divided into two kinds on mechanical valve and on-mechanical valve.Because mechanical valve is jam, wearing and tearing easily at high temperature, what therefore be widely used at present is non-mechanical valve.Comparatively common on-mechanical valve has L valve, V valve, closed conveying valve (Seal Pot), U valve (Loop Seal), H valve etc.Its operation principle all is the material that utilizes in the fluidized wind fluidisation valve body, makes it in valve body, to flow.
But, in practical application, have the bulky grain that surpasses the design particle diameter sometimes and get into valve body, such as: be not equipped with in the CFBB of suitable fuel crushing system, go into and sneaked into bigger particle in the stove fuel; Perhaps in closed circuit, added bulky grain for some specific use.If these bulky grains get into on-mechanical valves, because its particle diameter exceeds the design particle diameter, be difficult to be fluidized distinguished and admirableization, thereby be easy to be deposited on the bottom of valve body, form the fluidisation dead band, influence its normal operation, when serious even can cause the on-mechanical valve entirely ineffective.
Summary of the invention
The purpose of this invention is to provide a kind of material circulation device, can the large granular materials greater than on-mechanical valve design particle diameter be sorted out and discharge, avoid it to be deposited in the on-mechanical valve, to guarantee material circulation device operation steady in a long-term with sorting function.
For achieving the above object, technical solution of the present invention is following:
A kind of material circulation device with sorting function comprises on-mechanical valve 1, and it also comprises sorter 2; Sorter 2 comprises cylindricality branch constituency 21, conical branch constituency 22, air-distribution device 23, scum pipe 24 and discharging opening 25; Air-distribution device 23 is positioned at 22 bottoms, conical branch constituency with scum pipe 24, and cylindricality branch constituency 21 is positioned at 22 tops, conical branch constituency; Conical branch constituency 22 is a back taper, up big and down small, and its top diameter and cylindricality divide the constituency 21 equal diameters, and cylindricality branch constituency 21, conical branch constituency 22, scum pipe 24 interlink; 21 tops, cylindricality branch constituency are provided with material inlet 20, and the sidewall middle part is provided with discharging opening 25, and discharging opening 25 links to each other with on-mechanical valve feed pipe 11.
Described material circulation device with sorting function, the top of its said sorter 2 is to the height H of the charging aperture lower edge of on-mechanical valve 1
1Greater than the design particle diameter particle of on-mechanical valve 1 at superficial velocity U
0The time 3 times of maximum splash height.
Described material circulation device with sorting function, the height H of its said on-mechanical valve feed pipe 11 from its bottom to sorter discharging opening 25 lower edges
2Greater than 2 times of on-mechanical valve feed pipe 11 diameters.
Described material circulation device with sorting function, its said conical cone angle≤60 of dividing constituency 22 °.
Described material circulation device with sorting function, it feeds fluidized wind through air-distribution device 23 in sorter 2, and cylindricality is divided the apparent fluidizing velocity U of fluidized wind in the constituency 21
0Should satisfy U
Mf＜U
0＜5U
Mf, U
MfCritical fludization velocity for design particle diameter particle.
Described material circulation device with sorting function, it also comprises dust arrester 3, the inlet tube of dust arrester 3 is connected with 21 tops, cylindricality branch constituency of sorter 2.
Described material circulation device with sorting function, its said air-distribution device 23 is the air distribution plate of band air compartment.
Described material circulation device with sorting function, its said air-distribution device 23 is a wind-distributing pipe.
Described material circulation device with sorting function, its said on-mechanical valve 1 is U valve, L valve, V valve, closed conveying valve or H valve.
The material circulation device that the present invention proposes with sorting function, simple in structure, easy and simple to handle, can prevent effectively that the bulky grain that surpasses on-mechanical valve design particle diameter is deposited in the on-mechanical valve, has guaranteed the long-term stability operation of material circulation device.
Description of drawings
Fig. 1 is the sketch map of the embodiment of the invention 1;
Fig. 2 is the sketch map of the embodiment of the invention 2.
The specific embodiment
Like Fig. 1, shown in 2, a kind of material circulation device with sorting function comprises on-mechanical valve 1, and it also comprises sorter 2; Sorter 2 comprises cylindricality branch constituency 21, up big and down small taper shape branch constituency 22, air-distribution device 23, scum pipe 24 and discharging opening 25; Air-distribution device 23 is positioned at up big and down small 22 bottoms, taper shape branch constituency with scum pipe 24, and cylindricality branch constituency 21 is positioned at 22 tops, conical branch constituency; Up big and down small taper shape branch constituency 22 top diameters and cylindricality divide the constituency 21 equal diameters; 21 tops, cylindricality branch constituency are provided with material inlet 20, and the sidewall middle part is provided with discharging opening 25, and discharging opening 25 links to each other with on-mechanical valve feed pipe 11.
The top of said sorter 2 is to the height H of the charging aperture lower edge of on-mechanical valve 1
1Design the particle diameter particle at superficial velocity U greater than on-mechanical valve 1
0The time 3 times of maximum splash height.
The height H of said on-mechanical valve feed pipe 11 from its bottom to sorter discharging opening 2 lower edges
2Greater than 2 times of on-mechanical valve feed pipe 11 diameters.
Said up big and down small taper shape divides cone angle≤60 ° in constituency 22.
In sorter 2, feed fluidized wind through air-distribution device 23, cylindricality is divided the apparent fluidizing velocity U of fluidized wind in the constituency 21
0Should satisfy U
Mfs＜U
0＜5U
Mf, U
MfCritical fludization velocity for design particle diameter particle.
Said material circulation device with sorting function also comprises dust arrester 3, and the inlet tube of dust arrester 3 is connected with 21 tops, cylindricality branch constituency of sorter 2.
Said air-distribution device 23 is the air distribution plate of band air compartment, or wind-distributing pipe.
Said on-mechanical valve 1 is U valve, L valve, V valve, closed conveying valve or H valve.
Material circulation device with sorting function of the present invention, its principle is:
Along with the increase of fluidising air velocity, fixed bed will be gradually to bubbling bed, turbulent bed and the development of fast bed state, corresponding to critical fludization velocity, initial rate of transformation and terminal velocity.Particle grain size is different, and its critical fludization velocity, initial rate of transformation and terminal velocity are also different.Therefore at identical fluidising air velocity, the particle of different-grain diameter is in different fluidized states, utilizes the difference of this state can realize the sorting of different-grain diameter particle.Because up big and down small taper shape branch constituency 22 divides the cross-sectional area in constituency 21 different with cylindricality, the superficial velocity of fluidized wind in above-mentioned two zones is also just different.
Material circulation device with sorting function of the present invention; Be arranged at the cyclone dip-leg below; Recycle stock is after cyclone separator separates; 2 cylindricality divides the material inlet 20 at 21 tops, constituency to get into sorters 2 along dipleg from sorter, feeds fluidized winds from sorter 2 bottoms through air-distribution device 23, with fluidising air velocity be controlled at make the design size particles in up big and down small taper shape branch constituency 22 for turbulent bed to the fluidized state of bubbling bed, be in bubbling bed state in cylindricality branch constituency 21.Like this, surpass the design particle diameter bulky grain will all the other particles by turbulent bed in the transforming process of bubbling bed, along with the reduction of fluidized wind superficial velocity, and be deposited on the bottom in up big and down small taper shape branch constituency 22; All the other particles then divide the material discharging opening 25 of constituency 21 sidewalls to get into the entrance of on-mechanical valve 1 with the mode of overflow or splash from cylindricality.The bulky grain that accumulates in up big and down small 22 bottoms, taper shape branch constituency can regularly or continuously be discharged through scum pipe 24.Like this, the particle that gets into on-mechanical valve 1 be through sorting be no more than the design size particles, bulky grain can not take place be deposited on the situation in the on-mechanical valve 1, thereby can realize the long-term stability operation of whole material circulation device.
Up big and down small taper shape divides cone angle≤60 ° in constituency 22, otherwise divides on 22 cross sections of constituency the fluidized wind VELOCITY DISTRIBUTION uneven at up big and down small taper shape, channel occurs easily and can't realize sorting.
Work as U
0>=5U
MfThe time (U
MfCritical fludization velocity for design particle diameter particle), the design size particles is in the vigorous fluidisation state in cylindricality branch constituency 21, has a large amount of design size particles and gets into dust arrester 3, can't get back to the circulatory system through on-mechanical valve 1.
Material circulation device with sorting function of the present invention; Except but sorting is also discharged the bulky grain that exceeds the designed grain footpath; Can also be used to realize realization sorting of narrow-size distribution particle and circulation to different densities; The big density particulate species that exceeds design density is similar to the bulky grain that surpasses the design particle diameter, along with the fluidized wind superficial velocity in up big and down small taper shape branch constituency 22 short transverses reduces gradually, is deposited on the bottom in up big and down small taper shape branch constituency 22; All the other particles then divide the discharging opening 25 of constituency 21 sidewalls to get into the entrance of on-mechanical valve 1 with the mode of overflow or splash from cylindricality.The particle that accumulates in the up big and down small big density in 22 bottoms, taper shape branch constituency can regularly or continuously be discharged through scum pipe 24.
Embodiment 1
Referring to accompanying drawing 1, a kind of material circulation device with sorting function comprises on-mechanical valve 1 and sorter 2.Sorter 2 comprises cylindricality branch constituency 21, up big and down small taper shape branch constituency 22, air-distribution device 23 and scum pipe 24; Air-distribution device 23 is positioned at up big and down small 22 bottoms, taper shape branch constituency with scum pipe 24; Cylindricality branch constituency 21 is positioned at up big and down small 22 tops, taper shape branch constituency, and up big and down small taper shape branch constituency 22 top diameters and cylindricality divide the constituency 21 equal diameters; 21 tops, cylindricality branch constituency are provided with material inlet 20, and the sidewall middle part is provided with material discharging opening 25, and discharging opening 25 links to each other with the charging aperture of on-mechanical valve 1.The cone angle in conical branch constituency 22 is 20 °, and the top of sorter 2 is to the height H of the charging aperture lower edge of on-mechanical valve 1
1Be 1000mm.
Wherein, on-mechanical valve 1 is the closed conveying valve, and air-distribution device 23 is the air distribution plate of band air compartment, and scum pipe 24 interlinks with conical branchs constituency 22, its Open Side Down from the air distribution plate extension, and the bottom passes air compartment.
The design particle of on-mechanical valve 1 is the particle of particle diameter between 0～2mm, and bulk density is 753kg/m
3, apparent density 1143kg/m
3, average critical fludization velocity U
MfBe 0.12m/s.In sorter 2, feed fluidized wind through air-distribution device 23, make the apparent fluidizing velocity U in cylindricality branch constituency 21
0Be 2U
Mf, i.e. 0.3m/s, the average splash that design particle this moment highly is about 150mm.
Embodiment 2
Referring to accompanying drawing 2, a kind of material circulation device with sorting function comprises on-mechanical valve 1, sorter 2 and dust arrester 3.Sorter 2 comprises cylindricality branch constituency 21, up big and down small taper shape branch constituency 22, air-distribution device 23 and scum pipe 24; Air-distribution device 23 is positioned at up big and down small 22 bottoms, taper shape branch constituency with scum pipe 24, and cylindricality branch constituency 21 is positioned at up big and down small 22 tops, taper shape branch constituency; 21 tops, cylindricality branch constituency are provided with material inlet 20, and the sidewall middle part is provided with material discharging opening 25, links to each other with the charging aperture of on-mechanical valve 1.The cone angle in conical branch constituency 22 is 45 °, and the top of sorter 2 is to the height H of the charging aperture lower edge of on-mechanical valve 1
1Be 1200mm.
Wherein, on-mechanical valve 1 is the U-shaped valve, and air-distribution device 23 is a wind-distributing pipe, and bulky grain is from directly falling into scum pipe 24 between wind-distributing pipe.
The inlet tube of dust arrester 3 is connected with 21 tops, cylindricality branch constituency of sorter 2, and the gas in the sorter 2 is drawn after dust arrester 3 is removed fine particle.Dust arrester 3 can be a cyclone separator, also can be sack cleaner.
On-mechanical valve design particle is the particle of particle diameter between 0～0.7mm, and bulk density is 1496kg/m
3, apparent density 2526kg/m
3, average critical fludization velocity U
MfBe 0.09m/s.In sorter 2, feed fluidized wind through air-distribution device 23, make the apparent fluidizing velocity U in cylindricality branch constituency
0Be 3U
Mf, i.e. 0.27m/s, the average splash that design particle this moment highly is about 200mm.
Claims (8)
1. the material circulation device with sorting function comprises on-mechanical valve (1), it is characterized in that, also comprises sorter (2); Sorter (2) comprises cylindricality branch constituency (21), conical branch constituency (22), air-distribution device (23), scum pipe (24) and discharging opening (25); Air-distribution device (23) and scum pipe (24) are positioned at bottom, conical branch constituency (22), and cylindricality branch constituency (21) is positioned at top, conical branch constituency (22); It is conical that to divide constituency (22) be back taper, up big and down small, its cone angle≤60 °, and its top diameter and cylindricality are divided constituency (21) equal diameters, and cylindricality branch constituency (21), taper shape branch constituency (22), scum pipe (24) interlink; Top, cylindricality branch constituency (21) is provided with material inlet (20), and the sidewall middle part is provided with discharging opening (25), and discharging opening (25) links to each other with on-mechanical valve feed pipe (11).
2. by the described material circulation device of claim 1, it is characterized in that the top of said sorter (2) is to the height H of the charging aperture lower edge of on-mechanical valve (1) with sorting function
1Greater than the design particle diameter particle of on-mechanical valve (1) at apparent fluidizing velocity U
0The time 3 times of maximum splash height.
3. by the described material circulation device of claim 1, it is characterized in that the height H of said on-mechanical valve feed pipe (11) from its bottom to sorter discharging opening (25) lower edge with sorting function
2Greater than 2 times of on-mechanical valve feed pipe (11) diameter.
4. by the described material circulation device with sorting function of claim 1, it is characterized in that, in sorter (2), feed fluidized wind through air-distribution device (23), cylindricality is divided the apparent fluidizing velocity U of fluidized wind in the constituency (21)
0Should satisfy U
Mf＜U
0＜5U
Mf, U
MfCritical fludization velocity for design particle diameter particle.
5. by the described material circulation device with sorting function of claim 1, it is characterized in that, also comprise dust arrester (3), the inlet tube of dust arrester (3) is connected with the top, cylindricality branch constituency (21) of sorter (2).
6. by the described material circulation device of claim 1, it is characterized in that said air-distribution device (23) is the air distribution plate of band air compartment with sorting function.
7. by the described material circulation device of claim 1, it is characterized in that said air-distribution device (23) is a wind-distributing pipe with sorting function.
8. by the described material circulation device of claim 1, it is characterized in that said on-mechanical valve (1) is U valve, L valve, V valve, closed conveying valve or H valve with sorting function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910090131A CN101986030B (en) | 2009-07-29 | 2009-07-29 | Material circulating device with sorting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910090131A CN101986030B (en) | 2009-07-29 | 2009-07-29 | Material circulating device with sorting function |
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| Publication Number | Publication Date |
|---|---|
| CN101986030A CN101986030A (en) | 2011-03-16 |
| CN101986030B true CN101986030B (en) | 2012-10-03 |
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|---|---|---|---|
| CN200910090131A Active CN101986030B (en) | 2009-07-29 | 2009-07-29 | Material circulating device with sorting function |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109595541A (en) * | 2017-12-14 | 2019-04-09 | 湘潭锅炉有限责任公司 | A kind of lignite circulating fluidized bed boiler |
| CN110006035B (en) * | 2019-04-16 | 2020-05-22 | 杭州富丽达热电有限公司 | Boiler combustion material returning device and boiler combustion system thereof |
| CN111701853B (en) * | 2020-06-23 | 2022-07-01 | 新奥科技发展有限公司 | Fine powder separation device and chemical chain coal gasification system and method |
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| CN1270292A (en) * | 2000-05-12 | 2000-10-18 | 清华大学 | Method and equipment for separating ash from slags by fluidized bed |
| CN2747467Y (en) * | 2004-11-11 | 2005-12-21 | 华中科技大学 | Fluidised sealed material return device |
| CN200972112Y (en) * | 2006-11-13 | 2007-11-07 | 济南锅炉集团有限公司 | Wind distribution device of return apparatus |
| CN101219357A (en) * | 2007-01-10 | 2008-07-16 | 中国科学院工程热物理研究所 | circulating fluidized bed system with multi-stage material return |
| CN201145270Y (en) * | 2007-08-28 | 2008-11-05 | 北京热华能源科技有限公司 | Multilevel material separation and loopback apparatus for horizontal type circulating bed |
-
2009
- 2009-07-29 CN CN200910090131A patent/CN101986030B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104626A (en) * | 1985-06-13 | 1987-05-27 | 阿尔堡·维尔夫特公司 | Fluidized-bed reactor and method of operating thereof |
| CN1270292A (en) * | 2000-05-12 | 2000-10-18 | 清华大学 | Method and equipment for separating ash from slags by fluidized bed |
| CN2747467Y (en) * | 2004-11-11 | 2005-12-21 | 华中科技大学 | Fluidised sealed material return device |
| CN200972112Y (en) * | 2006-11-13 | 2007-11-07 | 济南锅炉集团有限公司 | Wind distribution device of return apparatus |
| CN101219357A (en) * | 2007-01-10 | 2008-07-16 | 中国科学院工程热物理研究所 | circulating fluidized bed system with multi-stage material return |
| CN201145270Y (en) * | 2007-08-28 | 2008-11-05 | 北京热华能源科技有限公司 | Multilevel material separation and loopback apparatus for horizontal type circulating bed |
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| CN101986030A (en) | 2011-03-16 |
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