CN208003685U - A kind of particle agglomeration room with tilting double entrances and turbulent element - Google Patents
A kind of particle agglomeration room with tilting double entrances and turbulent element Download PDFInfo
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- CN208003685U CN208003685U CN201721786097.9U CN201721786097U CN208003685U CN 208003685 U CN208003685 U CN 208003685U CN 201721786097 U CN201721786097 U CN 201721786097U CN 208003685 U CN208003685 U CN 208003685U
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Abstract
The utility model is related to a kind of particle agglomeration rooms with tilting double entrances and turbulent element, the reunion room includes arrival end, rectangular channel, converging transition and exhanst gas outlet, the arrival end is tilting two-speed entrance, two speed entrances are in be arranged symmetrically up and down about the horizontal axis of reunion room, and each speed entrance and the angle of horizontal direction are 30 °~45 °, two speed entrances are in integrally flaring form；The left end of rectangular channel connects arrival end, and right end connects converging transition, multiple turbulent elements are equidistantly disposed with along the horizontal axis of reunion room inside rectangular channel；It is exhanst gas outlet at the minimum diameter of converging transition, exhanst gas outlet end face is vertical with horizontal axis, and is connected with wet electrostatic precipitation equipment.The two-speed entrance for the tilting that the reunion room uses, the particle coalescence that percussion flow can be made to bring and the action time for extending shock and expansion active area；Tapered outlet is used simultaneously, promotes the collision coalescence of particle again.
Description
Technical field
The utility model belongs to the research field removed to fine particle coalescence in coal-fired flue-gas, and in particular to one kind has
The particle agglomeration room of tilting double entrances and turbulent element.
Background technology
Superfine particulate matter (PM2.5, i.e. diameter are less than 2.5 μm of particulate matter) has the residence time long in atmospheric environment,
The features such as long transmission distance, and its specific surface area is larger, is easy other harmful elements such as each heavy metal species of enrichment, to human body and
Environment all has prodigious harm, therefore, extremely urgent for the trapping problem of superfine particulate matter.
Nowadays it is before cleaner by physics or chemical action to the principle of fine particle coalescence removing sulfuldioxide
Fine particle is converted to larger particles, then is removed by traditional deduster.
As the utility model of Patent No. 2004200172264 provides a kind of impinging stream gas-liquid reactor.Using
Coaxial level impining stream is made of three absorption chamber, accelerating tube and pressure atomized fog jet components.Accelerating tube horizontal symmetrical arrangement,
Positioned at absorption chamber both ends, pressure atomized fog jet is arranged in accelerating tube, and hydrojet sprays into absorption chamber.Process gas flow at high speed passes through
Two accelerating tubes, process liquid or liquid consolidate suspended substance and enter accelerating tube, flow at high speed at droplet-like by pressure atomized fog jet spraying
Process gas carry its project accelerating tube, into absorption chamber in carry out lateral impact, form tubulence energy and the reinforcing of high intensity
Mass transfer.But there is also shortcomings for the utility model, and the flow field resistance that direct lateral impact generates is larger, and it is small to collide area.
Utility model content
What the technical issues of deficiency in view of the above technology, the utility model intends to solve was to provide is a kind of with inclination
The particle agglomeration room of formula double entrances and turbulent element.The reunion chamber inlet end is using the two-speed entrance of tilting, a side
Face is the particles collision coalescence that percussion flow is brought, and the action time of shock can be extended, expand acting surface by being on the other hand in tilted layout
Resistance in product and reduction flow field；Interlude is set as rectangular channel, inside equidistant placement along the horizontal axis of reunion room
Multiple turbulent elements are acted on by the flow-disturbing of turbulent element so that turbulent element rear generates velocity gradient, forms whirlpool, promotees
It is collided into fine grained；Using tapered outlet simultaneously so that granule partial enrichment occurs for outlet end, and granule density increases, then
The secondary collision coalescence for promoting particle.The utility model has the characteristics that easy to operate, internal component is less, operating cost is relatively low.
The utility model solve the technical problem the technical solution adopted is that：There is provided it is a kind of have the double entrances of tilting and
The particle agglomeration room of turbulent element, it is characterised in that the reunion room includes arrival end, rectangular channel, converging transition and exhanst gas outlet,
The arrival end is tilting two-speed entrance, and two speed entrances are in be arranged symmetrically up and down about the horizontal axis of reunion room,
And each speed entrance and the angle of horizontal direction are 30 °~45 °, two speed entrances are in integrally flaring form；Rectangular channel
Left end connect arrival end, right end connects converging transition, is equidistantly disposed with along the horizontal axis of reunion room inside rectangular channel more
A turbulent element；It is exhanst gas outlet at the minimum diameter of converging transition, exhanst gas outlet end face is vertical with horizontal axis, and quiet with wet type
Electric dust-removing equipment is connected.
Compared with prior art, the utility model has the beneficial effects that：
1) arrival end of the utility model is sprayed using double entrance convection current of tilting, while being also steam phase transforming area
Domain.Flue gas is sprayed by speed entrance, and under conditions of supersaturated vapor, steam is undergone phase transition using fine grained as the nuclei of condensation, is made
Grain graininess increases, and generates thermophoresis and the effect of diffusiophoresis, and fine grained is promoted to collide coalescence；The percussion flow that convection current injection generates
The direct collision for resulting in particle can extend the time of effect of impact using tilting to spray, increase effect of impact area,
The granule density for reducing the resistance in flow field simultaneously, and hitting generated impingement region is 5~7 times of near its circumference concentration, is increased
The big collision probability of particle.The results show that be substantially reduced in impingement region little particle Particle density, and larger particles Particle density is
It increases.
2) the utility model interlude is set as rectangular channel, is internally provided with a certain number of triangular prism spoilers, flow-disturbing
The setting of element is arranged according to the vortex structure in flow field, avoids and occurs production whirlpool difference and the high disadvantage of resistance in flow field,
And according to the flowfield fluid after shunting come be arranged triangular prism spoiler between upper lower wall surface at a distance from so that little particle is not only being disturbed
Coalescence is collided in the whirlpool of stream part rear, but also also will produce velocity gradient between the fluid and wall surface after shunting, is collided poly-
And the results show that in the whirlpool of triangular prism spoiler rear, the Particle density of larger particles increases again；Stream after shunting simultaneously
Body skims over lower wall surface, the phenomenon that avoiding particle attachment or be deposited on lower wall surface.
3) outlet end of the utility model is set as converging transition, for previous simple outlet, mixed airflow into
When entering converging transition, due to reduced cross-sectional, particle number concentrations is caused to increase, promote the collision of particle, the results show that small at converging transition
Particle is substantially by coalescence at larger particles.The larger particles formed in flow field are discharged into wet electrostatic precipitation equipment by exit.
4) during being removed to fine particle in coal-fired flue-gas after wet desulphurization using the reunion room, using entering
The steam phase transforming that mouth end occurs and the strong percussion flow of the double entrance convection current injection generations of tilting promote fine grain coalescence；And
The shunting of turbulent element and flow-disturbing effect, form larger velocity gradient, are allowed to generate vortex structure in flow field, promote fine grained
Collision coalescence；By the way that tapered outlet is arranged, so that outlet end particle number concentrations is increased, increase collision probability again.Speed enters
Particle at mouthful is mainly distributed on 1 μm hereinafter, after the reunion by the utility model, and outlet grain diameter is mainly distributed on
Between 1.5~3.5 μm, illustrate that the utility model is preferable to fine grain coalescence effect.By arrival end after direct collision shape
At the Particle density in impingement area region show that the Particle density of larger particles obviously rises on the area；As shown in Figure 1, three
The Particle density in the region between prism spoiler 3 and triangular prism spoiler 4, larger particles is promoted compared with impingement area region, is said
Effect after bright triangular prism spoiler rear whirlpool and shunting between fluid and wall surface makes fine grained coalescence grow up；In converging transition
The Particle density of particle is observed, it is found that little particle is substantially removed.
Description of the drawings
Fig. 1 is a kind of the vertical of the embodiment for the particle agglomeration room that the utility model has the double entrances of tilting and turbulent element
Body structural schematic diagram；
Fig. 2 is a kind of group of the embodiment for the particle agglomeration room that the utility model has the double entrances of tilting and turbulent element
Gather front and back particle size distribution figure；
In Fig. 1：1,2- speed entrance, 3,4,5,6- triangular prism spoilers, 7- rectangular channels, 8- converging transitions, 9- flue gases go out
Mouthful.
Specific implementation mode
Explain the novel embodiment in detail with example below in conjunction with the accompanying drawings, but not in this, as to the application right
The restriction of claimed range.
The utility model has the particle agglomeration room (abbreviation reunion room, referring to Fig. 1) of tilting double entrances and turbulent element,
The reunion room includes arrival end, rectangular channel 7, converging transition 8 and exhanst gas outlet 9, and the arrival end is tilting two-speed entrance
(1 and 2), two speed entrances about reunion room horizontal axis in being up and down arranged symmetrically, and each speed entrance and level side
To angle be 30 °~45 °, two speed entrances integrally be in flaring form；The left end of rectangular channel connects arrival end, and right end connects
Converging transition is connect, multiple turbulent elements are equidistantly disposed with along the horizontal axis of reunion room inside rectangular channel；The minimum of converging transition
It is exhanst gas outlet at diameter, exhanst gas outlet end face is vertical with horizontal axis, and is connected with wet electrostatic precipitation equipment.
Incoming flue gas enters reunion room by the speed entrance 1 and 2 that arrival end is arranged, and the primary air after collisional mixing enters square
Turbulent element is passed through in shape channel 7 successively, and the primary air mixed again after shunting reaches converging transition 8, and is flowed by exhanst gas outlet 9
Go out the reunion room, the wet electrostatic precipitation equipment connected into exit.
The utility model is provided with the speed entrance 1 and 2 of tilting in arrival end, and two speed entrances are about reunion room
Horizontal axis in being arranged symmetrically up and down, and each speed entrance and the angle of horizontal direction are 30 °~45 °, as shown in Figure 1, by
On the direction of left-to-right, two symmetrical speed entrances are in gradually expanded form, and incident collision only in this way can just occur.Percussion flow can be fine
Promotion particles collision coalescence, intergranular interpenetrate so that particle mutually touches is led to by the direct collision of two fluids
It hits, tubulence energy height, particle number concentrations height make particles collision probability increase around the impingement area that percussion flow generates.The utility model
Used tilting two-speed entrance can extend the time of effect of impact, while energy for coaxial horizontal access
The area for enough expanding effect of impact, can also reduce the resistance in flow field.
The utility model is further characterized by：The length of rectangular channel 7 is the 13/15~9/ of reunion room total length
10, rectangular channel is internally provided with triangular prism spoiler, and at 3~4, vertical view is isosceles triangle, isosceles three for quantity control
Angular bottom edge length is the 1/4~2/5 of reunion room overall width, and the high length ratio with bottom edge is 5: 6~1: 1, and two neighboring
Distance between triangular prism spoiler is the 2/15~4/15 of reunion room total length.According to vortex structure in flow field come reasonable Arrangement three
Prism spoiler avoids the flow field whirlpools Zhong Chan difference and the high disadvantage of resistance, while according to the fluid and wall surface in flow field after shunting
Between effect come be arranged triangular prism spoiler between wall surface at a distance from, make also to generate speed ladder between the fluid after shunting and wall surface
Degree, promotes fine grain collision.When triangular prism spoiler is set as 6, production whirlpool effect is relatively poor, and the resistance in flow field
Power is also larger.When the quantity of setting is 3~4, the pressure drop in flow field is within the allowable range.The setting side addressed in embodiment
Pressure reduction shown by formula meets reality in 1000pa.
The exhanst gas outlet 9 of the utility model is located at 8 throat location, that is, the position of diameter minimum, and converging transition is arranged
Exiting flue gas flow velocity can not only be increased, granule partial can also be made to assemble, i.e., particle number concentrations increase, conducive to touching for particle
It hits, the horizontal length of converging transition is the 1/15~2/15 of reunion room total length, a diameter of reunion room overall width of exhanst gas outlet
1/4~3/4.
The reunion room total length refers to the length of arrival end, the length of the length of rectangular channel and converging transition 8 among the above
The sum of three is spent, reunion room overall width is the width of rectangular channel.
The utility model promote fine particle collision coalescence specific method be：Reunion room is horizontal positioned, and two speed enter
Mouth is located at left end, and exhanst gas outlet is located at right end, and the coal-fired flue-gas after wet desulphurization enters reunion room by arrival end, first
It is that steam phase transforming occurs, steam is generated phase transformation using particle as the nuclei of condensation, grain graininess is made to increase, and thermophoresis and diffusiophoresis is cooperateed with to make
Strong percussion flow is generated with making particle motion collision, then by tilting convection current injection, promotes particles collision coalescence again；It touches
It hits mixed primary air and enters rectangular channel 7, followed by turbulent element, on the one hand since the flow-disturbing of turbulent element acts on,
Corresponding velocity gradient is generated, forms vortex structure at the rear of triangular prism spoiler, particle collides coalescence at larger in whirlpool
Particle flows out flow field, on the other hand due to the shunting function of turbulent element so that the fluid after shunting and wall surface after being detached from whirlpool
Between generate velocity gradient, promote particles collision, while the two fluids after shunting respectively flows through lower wall surface, and flow velocity increases,
It avoids lower wall surface and the attachment of particle or depositional phenomenon occurs, play the role of one and persistently clean；It is mixed again after shunting
Primary air pass through converging transition 8, due to the diminution in section at converging transition so that granule partial be enriched with, increase particles collision
Probability.It collides into and wet electrostatic precipitation equipment is discharged by exhanst gas outlet 9 after larger particles.
The utility model based on the recognition that：The caused percussion flow of convection current injection, the selection of incidence angles degree, difference
The effect of the particulate matter, turbulent element stream field of aerodynamic size and vortex structure, which inhale the volume of different-grain diameter particle, to be made
With.
Embodiment 1
The present embodiment has the particle agglomeration room of tilting double entrances and turbulent element, includes the tilting of arrival end setting
The triangular prism spoiler and converging transition 8 and exhanst gas outlet 9 of two-speed entrance 1 and 2, rectangular channel 7 and internal setting.Incoming flue gas
Reunion room is entered by the speed entrance 1 and 2 of arrival end setting, and each speed entrance and the angle of horizontal direction are 30 °；Collision
Mixed primary air enters rectangular channel 7, is internally provided with four triangular prism spoilers (3,4,5,6), flue gas is successively by disturbing
Fluid element, the primary air mixed again after shunting reaches converging transition 8, and flows out the device by exhanst gas outlet 9, into exit
The wet electrostatic precipitation equipment of connection.
The reunion room overall size of Fig. 1 is the ㎜ of ㎜ × 100 of 1500 ㎜ × 200, the size in intermediate rectangular channel be 1360 ㎜ ×
Four triangular prism spoiler sizes of the ㎜ of 200 ㎜ × 100, setting are identical, and vertical view is isosceles triangle, a height of 50 ㎜, bottom
The length of side is 60 ㎜, and the distance between two neighboring triangular prism spoiler is 300 ㎜, and outlet end is set as converging transition, converging transition
Horizontal length is 100 ㎜, and the diameter of exhanst gas outlet is set as 100 ㎜.
The incoming flue gas of the present embodiment can be by obtaining in discharged from coal-fired boiler flue, particle size distribution model wherein in flue gas
It is trapped among 0.1~7.39 μm, primary particle size range is distributed in 0.1~1 μm, accounts for the 98% of total grain size.What is used in the present embodiment enters
Mouthful speed is 5m/s, into reunion room after steam phase transforming occurs first, then by a series of collision coalescence, form larger particles stream
Go out flow field, is removed into wet electrostatic precipitation equipment.
From the present embodiment simulate come speed vector figure in as can be seen that setting velocity of flue gas be 5m/s, flue gas by
Speed entrance inject, into reunion room after direct collision occurs, larger velocity gradient is generated with surrounding, in arrival end and trigone
Whirlpool is generated at upper lower wall surface between column spoiler 3；Primary air after collisional mixing enters rectangular channel 7, followed by three
Prism spoiler 3,4,5,6, the shunting and flow-disturbing effect due to spoiler are apparent so that two bursts of air velocities after shunting increase
Add, generate larger velocity gradient, the whirlpool of different scale is respectively formed at the rear for streaming part；Flow through the main gas of rectangular channel
Stream passes through converging transition, reduced cross-sectional area, and speed increases, and the Local enrichment of particle occurs at this, increases the collision of particle
Probability, little particle are collided into larger particles, and flow field is finally flowed out, the cleaner connected into exit, and are removed.
Fig. 2 is the grain size distribution before and after particle agglomeration.Particle size distribution is mainly concentrated before reuniting as seen from the figure
At less than 1 μm, maximum is occupied between 15%~17%, and is distributed in 1% hereinafter, and mesh for the particle more than 1 μm
Before, using wet cottrell, for the particle between 0.1~1 μm, there are a particulate matters to penetrate window, for the section
Little particle arresting efficiency it is very low.Particle size distribution after being reunited using the utility model, it can be seen that grain diameter is main
It is distributed between 1.5 μm~3.5 μm, maximum is occupied between 20%~22%, and the particle almost coalescence less than 1 μm
At larger particles, before proportion is well below reunion.Illustrate that the utility model agglomerating effect is preferable, makes below less than 1 μm
Particle can reunite the larger particle of long great achievement, be convenient for the removing of wet cottrell.
The utility model does not address place and is suitable for the prior art.
Claims (5)
1. a kind of particle agglomeration room with tilting double entrances and turbulent element, it is characterised in that the reunion room includes entrance
End, rectangular channel, converging transition and exhanst gas outlet, the arrival end are tilting two-speed entrance, and two speed entrances are about group
The horizontal axis of poly- room is in be arranged symmetrically up and down, and each speed entrance and the angle of horizontal direction are 30 °~45 °, two speed
It is in flaring form to spend entrance integrally；The left end of rectangular channel connects arrival end, and right end connects converging transition, and edge is rolled into a ball inside rectangular channel
Multiple turbulent elements are equidistantly disposed on the horizontal axis of poly- room；It is exhanst gas outlet, exhanst gas outlet at the minimum diameter of converging transition
End face is vertical with horizontal axis, and is connected with wet electrostatic precipitation equipment.
2. the particle agglomeration room according to claim 1 with tilting double entrances and turbulent element, which is characterized in that square
Turbulent element in shape channel is triangular prism spoiler, and the quantity of turbulent element is 3~4, two neighboring triangular prism spoiler
Between distance be reunion room total length 2/15~4/15.
3. the particle agglomeration room according to claim 2 with tilting double entrances and turbulent element, which is characterized in that institute
The bottom surface for stating triangular prism spoiler is isosceles triangle, and the length on isosceles triangle bottom edge is the 1/4~2/ of reunion room overall width
5, the high length ratio with bottom edge is 5: 6~1: 1.
4. the particle agglomeration room according to claim 1 with tilting double entrances and turbulent element, which is characterized in that cigarette
The 1/4~3/4 of a diameter of reunion room overall width of gas outlet.
5. the particle agglomeration room according to claim 1 with tilting double entrances and turbulent element, which is characterized in that gradually
The horizontal length of contracting section is the 1/15~2/15 of reunion room total length.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721786097.9U CN208003685U (en) | 2017-12-20 | 2017-12-20 | A kind of particle agglomeration room with tilting double entrances and turbulent element |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721786097.9U CN208003685U (en) | 2017-12-20 | 2017-12-20 | A kind of particle agglomeration room with tilting double entrances and turbulent element |
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| CN208003685U true CN208003685U (en) | 2018-10-26 |
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| CN201721786097.9U Expired - Fee Related CN208003685U (en) | 2017-12-20 | 2017-12-20 | A kind of particle agglomeration room with tilting double entrances and turbulent element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108159787A (en) * | 2018-03-22 | 2018-06-15 | 河北工业大学 | Strengthen the device that fine particle collision coalescence is grown up in flue gas |
-
2017
- 2017-12-20 CN CN201721786097.9U patent/CN208003685U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108159787A (en) * | 2018-03-22 | 2018-06-15 | 河北工业大学 | Strengthen the device that fine particle collision coalescence is grown up in flue gas |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181026 Termination date: 20211220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |