CN104888983A - Rotary parallel dust collection device with double-layer cyclone separators - Google Patents
Rotary parallel dust collection device with double-layer cyclone separators Download PDFInfo
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- CN104888983A CN104888983A CN201510356260.7A CN201510356260A CN104888983A CN 104888983 A CN104888983 A CN 104888983A CN 201510356260 A CN201510356260 A CN 201510356260A CN 104888983 A CN104888983 A CN 104888983A
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Abstract
The invention discloses a rotary parallel dust collection device with double-layer cyclone separators. The rotary parallel dust collection device mainly comprises a center barrel, a middle barrel and an outer barrel which are arranged coaxially. Cavities are arranged among the center barrel, the middle barrel and the outer barrel, the center barrel, the middle barrel and the outer barrel are hermetically isolated from one another, and a tangential inlet is formed in the upper end of the cavity between the middle barrel and the outer barrel; a plurality of small cyclone separators are distributed in the cavity of the middle barrel in parallel to form two layers, the small cyclone separators on the outer layer are uniformly fixed onto the inner wall of the middle barrel around the centers of the three barrels, and the small cyclone separators on the inner layer are uniformly distributed between the cyclone separators on the outer layer and the center barrel. The rotary parallel dust collection device has the advantage that problems of low dust collection efficiency and uneven air distribution of multiple cyclone separators in an existing boiler can be solved by the aid of the rotary parallel dust collection device.
Description
Technical field
The present invention relates to a kind of double-deck cyclone separator and rotate dust arrester in parallel, particularly relate to the double-deck cyclone separator that one can trap fine particle (PM2.5) and rotate dust arrester in parallel.
Background technology
Atmosphere pollution is one of key factor affecting China's environment, and wherein dust pollution is the pith of atmosphere pollution.Research shows, the fine particle (PM2.5) in dust is easy to heavy metal in enriched air, acidic oxide, organic pollution, bacterium and virus etc., its to the harm of health far above coarseparticulate.Therefore, control dust pollution, the discharge especially controlling ultra-fine grain is significant.(magnifying year, the research of Inhalable Particulates in Urban Ambient Air, [J] Shanghai environmental science, 1999,18(4): 154-157).
Cyclone separator has the advantages such as structure is simple, small investment, operating cost are low because of it, and industrial dedusting is widely used.But single cyclone separator efficiency of dust collection is low, cannot meet the dust removal requirement of large-sized boiler.Numerous scholar's research, in CFBB, adopts the mode of multiple cyclone separator parallel connection to carry out desulfurization and dedusting.Law of the country army of the Chinese Academy of Sciences, Liao Lei etc. ([1] law of the country army. the many cyclone separators of recirculating fluidized bed are arranged in parallel cold state experimental [D]. Postgraduate School, Chinese Academy of Sciences (Engineering Thermophysics research institute), 2014; [2] Liao Lei. six cyclone separators are arranged in parallel experimental study and the numerical simulation [D] of recirculating fluidized bed. Postgraduate School, Chinese Academy of Sciences (Engineering Thermophysics research institute), 2011) have studied six cyclone separators with the situation of the symmetrical H type distribution of furnace chamber central shaft.As shown in Figure 3.Experimental result shows, there is gas-solid and distribute uneven phenomenon between six cyclone separators; Under the same conditions, the cyclone separator pressure drop of diverse location and air quantity all have some differences.At burner hearth homonymy, the pressure drop being positioned at middle cyclone separator is lower than the pressure drop of cyclone separator being positioned at two ends; Side cyclone separator pressure drop near the female pipeline of afterbody is greater than the pressure drop away from the female pipeline side of afterbody, and middle position pressure drop size is between the two.When burner hearth wind speed 5m/s, the pressure drop deviation of six cyclone separators is about 5.6%.Visible, six cyclone separators adopt central shaft to be arranged symmetrically with pattern, and two middle cyclone separator cloth cannot reach gas-solid equilibrium all the time and particle phase volume fraction is even.
Studies have found that in addition, in high density multiphase flow, Gas-particle Flows is in separator during impartial distribution, and separator pressure loss is maximum; In low-density multiphase flow, when especially density is very low, impartial distribution can make separator pressure loss reduction, and is unequally assigned the larger pressure loss.
Liao Lei and law of the country army analyze the reason of gas-particle two-phase uneven distribution between multiple cyclone separator, mainly contain two parts: a part is because the pulsating nature of aggregative fluidization and the multi-solution of symmetrical structure cause, and another part is because the non complete symmetry of structure causes.As can be seen here, the gas-particle two-phase realizing multiple cyclone separator is uniformly distributed raising efficiency of dust collection, to reduce energy loss significant.
Summary of the invention
The invention provides a kind of double-deck cyclone separator and rotate dust arrester in parallel, multiple cyclone separator efficiency of dust collection in existing boiler is low to solve, the problem of tolerance skewness.
For this reason, following technical scheme is adopted:
A kind of double-deck cyclone separator rotates dust arrester in parallel, primarily of the coaxial central cylinder, middle cylinder, the outer cylinder body composition that arrange, there is cavity, each other seal isolation each other, the bottom of this three cylindrical shell is cone structure and the cone distal end of middle cylinder and outer cylinder body is inside and outside underflow opening, and this inside and outside underflow opening is connected with ash exhauster by flange; Cavity upper end between described middle cylinder and outer cylinder body is provided with tangential entry; Several small cyclones separators are distributed in the cavity of middle cylinder in double-deck, several small cyclones separators outer field are with the center of three cylindrical shells for axle is evenly fixed on the inwall of middle cylinder, and several small cyclones separators of internal layer are evenly distributed between outer small cyclones separator and central cylinder; The junction of middle cylinder and its underpart cone is connected with base plate, leaves air inlet annular distance between the outer rim of this base plate and the inwall of middle cylinder; The bottom discharge mouth of several small cyclones separators described to be fixed on base plate and and the cone of middle cylinder bottom through; The upper end of several small cyclones separators described has air inlet, and the inner chamber of this air inlet and middle cylinder is through; The outlet of these several small cyclones separator upper ends by bend pipe and central cylinder through; Described bend pipe is placed in the top seal at outer cylinder body top, and this top cover has outlet.
The cross section of described winding pipe exit and the angle of horizontal plane are 90
oto 180
o.
The present invention has considered that the efficiency of dust collection of multiple cyclone separator is low, the reason of tolerance and pressure drop distribution inequality, by multiple small cyclones separator parallel configuration in a large cavity, be specially small cyclones separator coaxially to arrange, rotate arrangement one week around central axis, then boiler furnace chamber is included dirt gas and directly send into large cavity internal cyclone separators with pipeline and carry out dedusting.
The contrast of the present invention and multiple cyclone separator H type in parallel layout as shown in Figures 2 and 3.Several small cyclones separators of the present invention to rotate a circle layout around central shaft, and the parallel connection of multiple cyclone separator H type take furnace chamber as symmetry axis, and six cyclone separators divide equally layout in furnace chamber both sides.In laboratory, test the dust removing effects of the present invention and multiple cyclone separator H type in parallel layout, air quantity and pressure drop distribution uniformity, test air quantity is 10000m
3/ h.Test result as Figure 4-Figure 6.Fig. 4 is the change in pressure drop that two kinds of cyclone separator layouts cause.As can be seen from the figure, in the present invention, the pressure drop size of each cyclone separator is substantially identical, and the parallel connection of multiple cyclone separator H type causes the pressure drop difference of each cyclone separator larger.Fig. 5 is the air quantity change that two kinds of cyclone separator layouts cause, can find out, multiple cyclone separator H type layouts cause the gas-solid skewness of each cyclone separator, and air quantity is variant, and the air quantity difference of each cyclone separator of the present invention is little, achieve being uniformly distributed of air quantity.Fig. 6 is the separation efficiency comparative of two kinds of cyclone separator layouts, and the Effiency of whirlwind Separator of H type layout is variant, and B separative efficiency is minimum, and be that 60%, A is up to 80%, total separative efficiency is 79%; And the efficiency of dust collection of each cyclone separator is about 96% in the present invention, total efficiency of separation is 96%.Therefore, separative efficiency of the present invention, much larger than H type layout, efficiently can remove the particle in dusty gas.
In sum, compared with traditional multiple cyclone separator H type parallel configuration, the present invention can solve air quantity and the shortcoming such as pressure drop distribution is uneven, separative efficiency is low, each small cyclones separator air quantity of coaxial layout is even, pressure drop is equal, separative efficiency is even, can collect dust in dusty gas efficiently.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the schematic diagram of cyclone separator H type parallel configuration in prior art;
Fig. 4 is the pressure drop comparison diagram of cyclone separator H type parallel configuration in the present invention and prior art;
Fig. 5 is the air quantity comparison diagram of cyclone separator H type parallel configuration in the present invention and prior art;
Fig. 6 is the separation efficiency comparative figure of cyclone separator H type parallel configuration in the present invention and prior art.
A to F in Fig. 4,5,6 represents cyclone separator of the prior art, and X
1to X
6, Y
1to Y
12for each cyclone separator in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment 1, with reference to Fig. 1,2, a kind of double-deck cyclone separator rotates dust arrester in parallel, form primarily of coaxial setting, the central cylinder 14 each other with cavity, each other seal isolation, middle cylinder 27, outer cylinder body 23, the bottom of this three cylindrical shell is cone structure and the cone distal end of middle cylinder 27 and outer cylinder body 23 is inside and outside underflow opening 10,24, and this inside and outside underflow opening 10,24 is connected with ash exhauster 6 by flange; Cavity upper end between described middle cylinder 27 and outer cylinder body 23 is provided with tangential entry 22; Several small cyclones separators 28 are distributed in the cavity of middle cylinder 27 in double-deck, outer field some cyclone separators are with the center of three cylindrical shells for axle is evenly fixed on the inwall of middle cylinder 27, and several cyclone separators of internal layer are evenly distributed between outer cyclone separator and central cylinder 14; The junction of middle cylinder 27 and its underpart cone is connected with base plate 11, leaves air inlet annular distance 26 between the outer rim of this base plate 11 and the inwall of middle cylinder 27; The bottom discharge mouth 9 of several cyclone separators 28 described to be fixed on base plate 11 and and the cone of middle cylinder 27 bottom through; The upper end of several small cyclones separators 28 described has air inlet 29, and the inner chamber of this air inlet 29 and middle cylinder 27 is through; The outlet of these several small cyclones separator 28 upper ends by bend pipe 12 and central cylinder 14 through; The top cover 13 that described bend pipe 12 is placed in outer cylinder body top seals, and this top cover 13 has outlet 15.
The angle of the cross section that described bend pipe 12 exports and horizontal plane is 90
oto 180
o, pressure drop is uniformly distributed.
Described ash exhauster 6 is made up of bed material groove 17, connection valve 19, U-shaped pipe 20; Described bed material groove 17 one end is connected by flange 16 with described inside and outside underflow opening 10,24, and the other end is connected with U-shaped pipe 20 by connection valve 19, and the other end of this U-shaped pipe 20 is sewage draining exit 21; The bottom of bed material groove 17 is provided with blowoff valve 18.
Embodiment 2, with reference to Fig. 1, the bed material groove 17 of described ash exhauster is communicated with central cylinder 14 by blow-off pipe 30, solves the laying dust problem in central cylinder 14.Remaining with embodiment 1.
The course of work of the present invention: dust-contained airflow tangentially enters the upper end of cavity between outer cylinder body 23 and middle cylinder 27 by tangential entry 22, produces rotating flow, under centrifugal action, carries out first order separation.Isolated coarse granule or drop will fall the cone inwall of outer cylinder body 23 lower end, discharge through outer underflow opening 24.The air-flow be separated through the first order to enter the bottom of middle cylinder 27 through air inlet annular distance 26, then rotate into each cyclone separator 28 respectively from the air inlet 29 of small cyclones separator 28 upper end of some parallel connections simultaneously, in cyclone separator, produce rotating flow, carry out second level separation.Air-flow after the second level is separated is discharged to central tube 14 through bend pipe 12, and air-flow carries out colliding, reuniting in central tube 14, and the fine particle that part is not trapped is grown up again, realizes the third level and is separated.Be provided with blow-off pipe 30 in central tube 14 bottom, the drop generated after the third level is separated is discharged to bed material groove 17 by blow-off pipe 30.Finally, under the suction function that outside applies, the air-flow in central tube 14 can enter discharge duct below by outlet 15.
Claims (4)
1. a double-deck cyclone separator rotates dust arrester in parallel, it is characterized in that: primarily of the coaxial outer cylinder body (23), middle cylinder (27), central cylinder (14) composition that arrange, there is cavity, each other seal isolation each other, the bottom of this three cylindrical shell is cone structure, and the cone distal end of middle cylinder (27) and outer cylinder body (23) is inside and outside underflow opening (10,24), this inside and outside underflow opening (10,24) is connected with ash exhauster by flange; Cavity upper end between described middle cylinder (27) and outer cylinder body (23) is provided with tangential entry (22); Several small cyclones separators (28) are distributed in bilayer in the cavity of middle cylinder (27), several small cyclones separators outer field are with the center of three cylindrical shells for axle is evenly fixed on the inwall of middle cylinder (27), and several small cyclones separators of internal layer are evenly distributed between outer small cyclones separator and central cylinder (14); The junction of middle cylinder (27) and its underpart cone is connected with base plate (11), leaves air inlet annular distance (26) between the outer rim of this base plate (11) and the inwall of middle cylinder (27); The bottom discharge mouth (9) of several small cyclones separators (28) described be fixed on base plate (11) upper and and the cone of middle cylinder (27) bottom through; The upper end of several small cyclones separators (28) described has air inlet (29), and the inner chamber of this air inlet (29) and middle cylinder (27) is through; The outlet of these several small cyclones separator (28) upper ends by bend pipe (12) and central cylinder (14) through, wherein peripheral bend pipe stretches to cylindrical shell axle center; Described bend pipe (12) is placed in top cover (13) sealing at outer cylinder body top, this top cover (13) has outlet (15).
2. the double-deck cyclone separator of one according to claim 1 rotates dust arrester in parallel, it is characterized in that: the angle of the cross section that described bend pipe (12) exports and horizontal plane is 90
oto 180
o.
3. the double-deck cyclone separator of one according to claim 1 rotates dust arrester in parallel, it is characterized in that: described ash exhauster is made up of bed material groove (17), connection valve (19), U-shaped pipe (20); Described bed material groove (17) one end is connected by flange (16) with described inside and outside underflow opening (10,24), and the other end is connected with U-shaped pipe (20) by connection valve (19), and the other end of this U-shaped pipe (20) is sewage draining exit (21); The bottom of bed material groove (17) is provided with blowoff valve (18).
4. the double-deck cyclone separator of one according to claim 3 rotates dust arrester in parallel, it is characterized in that: the bed material groove (17) of described ash exhauster is communicated with central cylinder (14) by blow-off pipe (30).
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| CN201510356260.7A CN104888983B (en) | 2015-06-25 | 2015-06-25 | Double-deck cyclone separator rotation dust arrester in parallel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231358A (en) * | 2018-11-26 | 2019-01-18 | 张芮滔 | Solid matter aperture swirl nozzle separator |
| CN110980740A (en) * | 2019-11-01 | 2020-04-10 | 新疆东方希望新能源有限公司 | Trichlorosilane production process and production system |
| CN112516949A (en) * | 2020-11-16 | 2021-03-19 | 南阳师范学院 | Reaction equipment with product separation function |
| CN114225606A (en) * | 2020-09-09 | 2022-03-25 | 财团法人工业技术研究院 | Particulate trapping system |
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| CN2038029U (en) * | 1988-11-24 | 1989-05-24 | 陈文君 | Dust separator |
| EP0595132A2 (en) * | 1992-10-28 | 1994-05-04 | Emtrol Corporation | Multi-stage cyclone separator system with intermediate manifold |
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| CN1422187A (en) * | 2000-03-31 | 2003-06-04 | 戴森有限公司 | Apparatus for separating particles from a fluid flow |
| CN204746643U (en) * | 2015-06-25 | 2015-11-11 | 王博 | Rotatory parallelly connected dust collector of double -deck cyclone |
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2015
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Patent Citations (6)
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| US3822529A (en) * | 1970-09-29 | 1974-07-09 | R Kilian | Particle separation system |
| CN2038029U (en) * | 1988-11-24 | 1989-05-24 | 陈文君 | Dust separator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231358A (en) * | 2018-11-26 | 2019-01-18 | 张芮滔 | Solid matter aperture swirl nozzle separator |
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| CN110980740A (en) * | 2019-11-01 | 2020-04-10 | 新疆东方希望新能源有限公司 | Trichlorosilane production process and production system |
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| CN112516949A (en) * | 2020-11-16 | 2021-03-19 | 南阳师范学院 | Reaction equipment with product separation function |
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| CN104888983B (en) | 2017-10-03 |
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Effective date of registration: 20200131 Address after: 215600 room 319-320, building a, Zhangjiagang Economic Development Zone (city high tech entrepreneurship Service Center), Suzhou City, Jiangsu Province Patentee after: Suzhou cloud Environment Technology Co., Ltd Address before: 730000 room 15, building 2502, two branch, Lanzhou University, Gansu, Lanzhou Patentee before: Wang Bo |