CN106345185B - A kind of inverted pyramid formula tube bank demister - Google Patents
A kind of inverted pyramid formula tube bank demister Download PDFInfo
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- CN106345185B CN106345185B CN201610721231.0A CN201610721231A CN106345185B CN 106345185 B CN106345185 B CN 106345185B CN 201610721231 A CN201610721231 A CN 201610721231A CN 106345185 B CN106345185 B CN 106345185B
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- outer cylinder
- demister
- demisting
- inverted pyramid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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Abstract
Inverted pyramid formula of the invention restrains demister, demister is set on the demisting layer of fume treatment tower, be characterized in that: inverted pyramid demister is made of the demisting unit of multiple coaxial arrangements, each demisting unit is made of outer cylinder, axis and impeller, the both ends open of outer cylinder, axis is located on the central axis of outer barrel cavity, and axis is mutually fixed by the inner wall of multiple support rods and outer cylinder, and wheel rotation is set on axis；In two demisting units, the top of lower section outer cylinder is fixed on the outer cylinder of top by multiple connecting rods, and the outer diameter of outer cylinder is gradually reduced in demisting unit from top to bottom, so that the outside of the droplet assembled on the outer tube inner wall of top outer cylinder from below is fallen.Inverted pyramid formula of the invention restrains demister, so that the outside for outer cylinder from below is fallen during the droplet assembled on the outer tube inner wall of top is fallen, " secondary pollution " is formed in the demisting unit without falling on lower section, so that defogging effect is more preferably.
Description
Technical field
The present invention relates to a kind of inverted pyramid formulas to restrain demister, more specifically, more particularly to a kind of by top demisting
The droplet that unit drips will not restrain demister to the inverted pyramid formula that lower section demisting unit impacts.
Background technique
Fume treatment is the necessary condition for reducing coal-burning boiler pollution, and in flue gas treating process, fume treatment exports powder
Dirt source is mainly formed by two: a part is the gypsum particle of the entrained liquid of desulfurized gypsum, and another part is original flue gas
Middle fine soot.
Wet desulphurization is bound to cause flue gas and carries a large amount of slurries since a large amount of desulfurization slurry sprays.In desulfurizing tower entoplasm
The liquid-drop diameter of liquid spray is generally in 2.5mm or so.These drops may also be broken into small droplet, mist because of reasons such as collisions
Foam, these droplets, mist and its dust particles of carrying diameter very little, between 1.0~150 μm；Small part drop also can be because
It evaporating by heat, and condenses mist formation because of cooling of the flue gas in tower internal upper part, can partially agglomerate, the particle of these droplets is smaller,
Diameter is between 0.10~30 μm.Biggish drop will not be carried by flue gas, or very little a possibility that carrying；It is carried by flue gas
Drop and its dust be largely molecule.A large amount of droplets fall back is to slurry pool, probability that slurry droplet is carried
It is very low, only 0.83%.
Since smoke evacuation total amount is big, flue gas actually still carries a large amount of drop and overflows, to form " gypsum rain "." stone
Cream rain " phenomenon refers to desulfurizer at runtime, and it is heavy that a certain amount of gypsum of chimney breast flue gas carrying forms apparent periphery drop
Phenomenon drops.Most of desulfurizer eliminates flue gas heater (GGH) in recent years, and after GGH cancels, neat stress humidity increases, cigarette
Air tightness increases, and flue gas diffusivity reduces, and chimney nearby has different degrees of " rainfall " phenomenon.Other the one of " rain " formation
It is a the reason is that environmental factor influence, it is generally the case that ambient air temperature is low, air pressure is low or will cause in the period of thick weather
The appearance of " rain ".Flue-gas temperature after desulfurization compared with undesulfured former smoke directly ventilating, is being lifted usually at 50 DEG C or so after desulfurization
It is relatively poor in terms of rise and diffusivity, therefore, when flue gas is discharged from chimney after the neat stress of desulfurization, due to smoke temperature with
Environment temperature difference is larger, and flue gas has little time to spread, and the saturated mode water in flue gas becomes hypersaturated state to the cold, in final flue gas
The dust and condensate liquid of carrying are gathered near chimney, fall to the ground to form " gypsum rain ".
In order to avoid droplet, mist carry dust spilling after fume treatment, improves absorption tower and exports demister fog removal performance,
Entrained liquid is reduced, is reduced " gypsum rain ", to reach dust removing effects.Existing frequently-used demister is divided into tubular demister, wave
Card formula demister, ridge type demister, high-efficiency turbulent flow demister, tubular demister are greater than 500 μm of drop to removal partial size
Effect is preferable, but bad to short grained drop removal effect.The flue gas flow rate that corrugated plate dst demister can be handled be 3.5~
5.5m/s be easy to cause secondary droplets when handling the flue gas compared with small particle.For existing high-efficiency turbulent flow demister, by
In being provided with multiple layers of vanes in a caliber from the bottom to top, droplet is thrown on tube wall and is gathered into water droplet by the blade of the top,
On the blade that lower section can be landed when water droplet is fallen, " secondary pollution " is caused, so that its treatment effect is bad.
Summary of the invention
The present invention in order to overcome the shortcomings of the above technical problems, provides a kind of inverted pyramid formula tube bank demister.
Inverted pyramid formula of the invention restrains demister, and demister is set on the demisting layer of fume treatment tower, at flue gas
It is provided with the flue of flue gas after being passed through processing on reason tower, has been provided with the support plate that carrying acts in demisting layer, under support plate
Side is uniformly fixed with several inverted pyramid demisters；Its special feature is that: the inverted pyramid demister is coaxially set by multiple
The demisting unit composition set, each demisting unit are made of outer cylinder, axis and impeller, and the both ends open of outer cylinder, axis is located at
On the central axis of outer barrel cavity, axis is mutually fixed by the inner wall of multiple support rods and outer cylinder, and wheel rotation is set to
On axis；In two demisting units, the top of lower section outer cylinder is fixed on the outer cylinder of top by multiple connecting rods, demisting from top to bottom
The outer diameter of outer cylinder is gradually reduced in unit, so as to the outer clan of the droplet assembled on the outer tube inner wall of top outer cylinder from below
Under.
Inverted pyramid formula of the invention restrains demister, and the outer cylinder is the shape that internal diameter is gradually reduced from the bottom to top；Two
In adjacent demisting unit, the diameter dimension at the top of the outer cylinder of lower section is less than the diameter dimension of top outer cylinder bottom.
Inverted pyramid formula of the invention restrains demister, is uniformly provided on the support plate in the demisting unit of the top
The mounting hole that is fixed of outer cylinder.
Inverted pyramid formula of the invention restrains demister, and the quantity of the demisting unit is 3.
The beneficial effects of the present invention are: inverted pyramid formula of the invention restrains demister, fume treatment tower demisting layer is carried
Several inverted pyramid demisters are uniformly fixed in the lower section of plate, each inverted pyramid demister by multiple coaxial arrangements demisting list
Member composition, and the outer diameter of outer cylinder is gradually reduced in demisting unit from top to bottom, so that assemble on the outer tube inner wall of top
During droplet is fallen, the outside for outer cylinder from below is fallen, and forms " secondary dirt in the demisting unit without falling on lower section
Dye ", so that defogging effect is more preferably.
Further, by the way that outer cylinder is designed as the shape that internal diameter from the bottom to top is gradually reduced, using venturi principle, make
It obtains and is increased by the mist flow rate after impeller, the bigger smog rotating flow of flow velocity can more come into full contact with the inner wall of outer cylinder, can make
The droplet for more carrying dust is assembled on outer tube inner wall, and the droplet after being gathered into water droplet is easier to the inner wall stream along outer cylinder
Under.
Detailed description of the invention
Fig. 1 is the schematic diagram for being equipped with the fume treatment tower of inverted pyramid formula tube bank demister of the invention；
Fig. 2 is the structural schematic diagram of support plate in the present invention；
Fig. 3 is the cross-sectional view for the fume treatment tower that inverted pyramid formula of the invention restrains demister；
Fig. 4 is the top view of single demisting unit in the present invention.
In figure: 1 fume treatment tower, 2 flues, 3 demisting layers, 4 support plates, 5 inverted pyramid demisters, 6 mounting holes, 7 remove
Mist unit, 8 outer cylinders, 9 axis, 10 support rods, 11 impellers, 12 connecting rods, 13 blades, 14 droplets.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
As shown in Figure 1, giving the signal for being equipped with the fume treatment tower of inverted pyramid formula tube bank demister of the invention
Figure, shown in of the invention inverted pyramid formula tube bank demister be fixed on by support plate 4 and uniformly 4 lower section of support plate it is several fall it is golden
Word tower demister 5 forms, and the bottom of shown fume treatment tower 1 is provided with flue 2, to be passed through into fume treatment tower 1
Fume treatment treated flue gas.As shown in Fig. 2, give the structural schematic diagram of support plate in the present invention, shown on support plate 4
It is uniformly provided with the mounting hole 6 for fixing inverted pyramid demister 5, the top of inverted pyramid demister 5 is fixed on mounting hole 6
On, and by being flowed out through treated the flue gas of inverted pyramid demister 5 through mounting hole 6.
As shown in figure 3, giving the cross-sectional view of the fume treatment tower of inverted pyramid formula tube bank demister of the invention, institute
The inverted pyramid demister 5 shown is made of multiple demisting units 7 being from top to bottom coaxially disposed, and each demisting unit 7 is again by outer
Cylinder 8, axis 9 and impeller 11 are constituted, and the both ends open of outer cylinder 8, inside are cavity, and axis 9 is set in 8 internal cavities of outer cylinder
On axis, the lower part of axis 9 is fixed on the inner wall of outer cylinder 8 by multiple support rods 10, and impeller 11 is rotatably arranged in axis 9
On, as shown in figure 4, giving the structural schematic diagram of single demisting unit 7 in the present invention, it is provided with around shown impeller 11
Several blades 13 can drive impeller 11 to be rotated during guaranteeing that flue gas flows from the bottom to top.
In inverted pyramid demister 5, the size of the outer cylinder 8 in demisting unit 7 from top to bottom is gradually reduced, lower section demisting
The lower part of outer cylinder 8 in the demisting unit 7 of top is fixed at the top of outer cylinder 8 by connecting rod 12 in unit 7, to realize adjacent demisting list
The interconnection of member 7.
During flue gas after fume treatment is flowed up by bottom, under the driving effect of flue gas, impeller can be driven
11 rotate movement, and the impeller 11 of rotation makes the flue gas of top at spiral state, spiralling flue gas, so that cigarette
Droplet containing fine solid particle particle in gas is more conducive to being in contact with the inner wall of outer cylinder 8, and dust-laden droplet connects with 8 inner wall of outer cylinder
It touches and constantly assembles, the droplet after aggregation can realize demisting, the dedusting purpose of fume treatment smog under the inside stream of outer cylinder 8.
The outside of the droplet flowed down outer cylinder 8 from below is fallen, and is impacted without the demisting unit 7 to lower section, is avoided and remove in the past
The drawbacks of dirt device.
In order to further enhance demisting, the dust removing effects of inverted pyramid demister 5, the internal diameter of shown outer cylinder 8 is from the bottom to top
It is gradually reduced, the outer diameter of outer cylinder 8 is less than 7 internal diameter of top demisting unit in lower section demisting unit 7, so as to by 8 inner wall of top outer cylinder
On the periphery of the droplet that drips outer cylinder 8 from below drip, " secondary pollution " is caused in the inside without dripping to lower section outer cylinder 8.By
Form is gradually reduced using internal diameter from the bottom to top in outer cylinder 8, due to venturi principle, so that passing through the flue gas flow rate of impeller 11 more
Add, be more advantageous to aggregation of the droplet on 8 inner wall of outer cylinder, and then forms water droplet and flow down.
Claims (4)
1. a kind of inverted pyramid formula restrains demister, demister is set on the demisting layer (3) of fume treatment tower (1), at flue gas
It is provided with the flue (2) of flue gas after being passed through processing on reason tower, the support plate (4) of carrying effect has been provided in demisting layer, has been carried
The lower section of plate is uniformly fixed with several inverted pyramid demisters (5)；It is characterized by: the inverted pyramid demister is by multiple same
Demisting unit (7) composition of axis setting, each demisting unit are made of outer cylinder (8), axis (9) and impeller (11), outer cylinder
Both ends open, axis are located on the central axis of outer barrel cavity, the inner wall phase that axis passes through multiple support rods (10) and outer cylinder
Fixed, wheel rotation is set on axis；In two demisting units, the top of lower section outer cylinder is fixed on by multiple connecting rods (12)
On the outer cylinder of top, the outer diameter of outer cylinder (8) is gradually reduced in demisting unit (7) from top to bottom, so as to top outer tube inner wall
The outside of the droplet of upper aggregation outer cylinder from below is fallen.
2. inverted pyramid formula according to claim 1 restrains demister, it is characterised in that: the outer cylinder (8) be by down toward
The shape that upper internal diameter is gradually reduced；In two adjacent demisting units, the diameter dimension at the top of the outer cylinder of lower section is less than top outer cylinder bottom
Diameter dimension.
3. inverted pyramid formula according to claim 1 restrains demister, it is characterised in that: uniformly opened on the support plate (4)
Equipped with the mounting hole (6) that the outer cylinder (8) on the top demisting unit (7) is fixed.
4. inverted pyramid formula according to claim 1 restrains demister, it is characterised in that: the number of the demisting unit (7)
Amount is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721231.0A CN106345185B (en) | 2016-08-25 | 2016-08-25 | A kind of inverted pyramid formula tube bank demister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610721231.0A CN106345185B (en) | 2016-08-25 | 2016-08-25 | A kind of inverted pyramid formula tube bank demister |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106345185A CN106345185A (en) | 2017-01-25 |
| CN106345185B true CN106345185B (en) | 2019-04-30 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2918765A1 (en) * | 1979-05-10 | 1980-11-13 | Kloeckner Humboldt Deutz Ag | Centrifugal dust separator system with several stages |
| CN204469408U (en) * | 2015-02-03 | 2015-07-15 | 青岛达能环保设备股份有限公司 | High-efficient multi-pipe spiral demist dust arrester |
| CN205073794U (en) * | 2015-10-09 | 2016-03-09 | 殷显伟 | Combination spiral -flow type defogging dust arrester installation |
| CN205235672U (en) * | 2015-12-08 | 2016-05-18 | 田鹏程 | Multistage pair of cyclone dust removal defroster of modified |
| CN206008249U (en) * | 2016-08-25 | 2017-03-15 | 山东应天节能环保科技有限公司 | A kind of inverted pyramid formula restrains demister |
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