CN106310793A - Swirling flow type demister for wet desulfurization - Google Patents
Swirling flow type demister for wet desulfurization Download PDFInfo
- Publication number
- CN106310793A CN106310793A CN201610690100.0A CN201610690100A CN106310793A CN 106310793 A CN106310793 A CN 106310793A CN 201610690100 A CN201610690100 A CN 201610690100A CN 106310793 A CN106310793 A CN 106310793A
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- Prior art keywords
- flow type
- spiral
- blade
- outer ring
- demister
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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
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- 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
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention relates to a swirling flow type demister for wet desulfurization. The demister comprises a supporting outer ring 1, a supporting inner ring 2 positioned in the middle of the supporting outer ring 1, and blades 3, wherein the blades 3 are fan-shaped; the height of the supporting outer ring 1 is equal to that of the supporting inner ring 2; the ends a of the blades 3 are inclined in an arc shape along the supporting inner ring 2 and are uniformly fixed through inside fasteners 4; the ends b of the blades 3 extend to the supporting outer ring 1 to be fastened by outside fasteners 5 due to deflection and torsion; the swirling flow type demister is mounted at the bottom of a desulfurization tower chimney, single assemblies are sequentially mounted, or the demister is completely installed outside the chimney and then lifted into the bottom of the chimney. According to the demister disclosed by the invention, liquid drops entrained in flue gas can be effectively captured, corrosion of acid droplets to the flue, fan and chimney is reduced, formation of stack rain is avoided, and the swirling flow type demister has the advantages of low investment, low operating cost, good demisting effect and capacity of effectively reducing emission of 'stack rain'.
Description
Technical field
The invention belongs to flue gas desulfurization environmental technology field, be specifically related to a kind of wet desulphurization spiral-flow type demister, should
Demister removes water smoke in flue gas in wet method fume desulfurizing system or similar field.
Background technology
Along with national environmental protection, energy-saving and emission-reduction require increasingly stricter, the enforcement of every environmental regulation policy, iron and steel smelting
The control of atmosphere pollution is had higher requirement by gold, electric power, all trades and professions such as coloured.Domestic electrical industry proposes combustion
The new environmental protection concept of coal power generation unit " ultra-clean discharge ", i.e. power plant's Air Pollutant Emission concentration is down to: nitrogen oxides 50mg/m3
Below, sulfur dioxide 35mg/m3Below, flue dust 5mg/m3Below.
Flue gas desulfurization technique is to control SO at present2Discharge most effective and most widely used technology, wherein wet process of FGD
Technology is the most ripe technique, and China's operation unit more than 80% is all assembled with wet desulfurizing process, and demister is that wet method takes off
The visual plant of sulfur system, is typically mounted on above desulfurizing tower or on the horizontal flue at desulfurizing tower rear, can trap cigarette after desulfurization
The drop carried secretly in gas, wet desulfurization system demister efficiency reduction in running is to cause to carry a large amount of droplet in smoke evacuation
Immediate cause.
Water smoke that after desulfurization, wet flue gas is formed, acid mist, aerosol, the easy shape of subparticle such as gypsum particle, especially PM2.5
Become secondary pollution, if through smoke stack emission to air, the equipment of surrounding, facility and building can be caused certain infringement, formed
" chimney rain " phenomenon；Chimney, pipeline, blower fan are all deposited Corrosion Potential by drop, acid fume mist simultaneously.For this degree of depth to wet flue gas
Purifying urgently to be resolved hurrily, for preventing and treating the formation of haze weather, the discharge controlling the subparticle in flue gas has become important step.
The demister of wet process of FGD wet method fume desulfurizing system is typically by demister body and rinse-system two parts
Composition, blade is the important component part of demister body, and its material mainly includes that macromolecular material is (such as polypropylene PP, FRP
Deng) and the big class of rustless steel (such as 316L, 317L etc.) two.By the geometry of demister blade, demister can be divided into baffling
Plate and two kinds of shapes of corrugated plating.
According to the arrangement form of demister, demister is often divided into tubular type, flat layout and three kinds of forms of ridge type.Except mist
Device is typically located at desulfurizing tower top, also has minority design that demister is arranged in desulfurization and exports in clean flue.
Number of patent application is " combination spiral-flow type is except the mist dust arrester installation " of CN 201520777918.7, and patent application
Number it is " spiral-flow type removes mist dust-precipitator " of CN 201320847305.7.Involved spiral-flow type, except mist dust-precipitator, is mounted on taking off
Inside sulfur tower epimere, being provided with the spray equipment that gathers dust, two grades of demisting and water saving devices, blade shape is curved, there is energy consumption height, duty
Between, and consume the defect of water resource.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, the present invention proposes a kind of wet
Method desulfurization spiral-flow type demister, including: support outer ring, be positioned at the support inner ring in the middle part of support outer ring and blade, described blade
For sector, described support outer ring is equal with the height of described support inner ring；The a end of described sector inclines along supporting inner ring arc
Tiltedly and by inner side securing member uniformly fix；It is tight that the b end of described sector extends to support outside, outer ring through skew torsion
Firmware is firm；Described support outer ring is welded by one piece of rectangular steel plates；Support inner ring by one piece of rectangular steel plates and two pieces of circles
Steel plate is closed and is welded；Described inner side securing member, outside securing member are made up of arc-shaped angle steel and bolt；Described spiral-flow type removes mist
Device is arranged on the bottom of desulfurizing tower chimney, and single component is installed successively, or falls into chimney bottom after chimney is the most self-contained.
Further, described a end blade upper point vertically point in bottom, the point of a end blade bottom, with a end blade top
The central angle that point is formed is 20-25 °.
Further, described b end blade upper point vertically point in bottom, the point of b end blade bottom, with b end blade top
The central angle that point is formed is 15-20 °.
Preferably, material used by the rectangular steel plates of described support outer ring is 2205 or 1.4529 rustless steels, and thickness is at least
10mm。
Preferably, material used by one piece of rectangular steel plates of described support inner ring and two blocks of circular steel plates is 2205 or 1.4529
Rustless steel, thickness at least 10mm.
Preferably, the sheet number of described blade is even slice, and sum is not more than 20,2205 or 1.4529 corrosion resistant plates cut
Cutting or setting-out forms, thickness is at least 10mm；Described leaf blade size, setting angle, angle of inclination are consistent；Described blade requires big
Little uniformly, surfaces externally and internally smooth.
Arc-shaped angle steel used by described inner side securing member, outside securing member is 2205 or 1.4529 rustless steels, spiral shell used
Bolt is 316L.
Described blade is fastened with chimney inner support beam glass fiber, it is ensured that do not rotate in tower.
During use, this spiral-flow type demister is placed in chimney bottom, in chimney bottom, except before mist, flue gas flows from bottom to top
Dynamic.Containing particulate matter, drop in flue gas, during flue gas with spiral-flow type demister blade contact, through sector unit
Bottom, up flows in eddy flow kenel, and droplet collided and adhesion and aggregation with blade in this stage, and partial drop can be carried out instead
Bullet, bounce-back drop can condense during the course further, grows into the landing of big drop, and the flue gas that density is less then continues to rise, and reaches
To synchronizing the little granule of removal and the purpose of drop.
Described revolution spiral-flow type demister can double as maintenance support platform, at least can bear 300kg/m2Lotus alive
Carry.
The invention has the beneficial effects as follows: vortex-flow and defrosting device is installed on chimney bottom, can effectively extend droplet trapping section, real
Testing, by FLUENT software, chimney interior three-dimensional two phase flow is carried out numerical simulation, gas phase uses RNG k-ε turbulence model, discrete
Use the Gypsum Fibrosum droplet in inert particle incidence simulated flue gas mutually, analyze the velocity field in tower, pressure field and inert particle and catch
The factors such as collection efficiency.Experiment shows in the case of entrance velocity is identical, and the inert particle of equal in quality flow is with identical speed
After degree is by vortex-flow and defrosting device, under the influence of centrifugal force, inert particle, with flue gas, revolves with centrifugal action under High Speed Flow Field
Turning gets rid of to wall, and particle collides with chimney wall, by wall adsorption, thus reaches the purpose that inert particle separates, for
The particle of 50 μm particle diameters can realize 100% trapping.
The rotary demister of the present invention all has great with the existing version of demister, installation site, manufacture material
Improving, it is installed on chimney bottom, can effectively catch the drop of entrained with in flue gas, reduce acid drop to flue, blower fan and
The corrosion of chimney, prevents the generation of chimney rain.Compared with the prior art, have small investment, operating cost low, except fog effect is good,
Effectively reduce the advantage that " chimney rain " discharges.
Accompanying drawing explanation
Fig. 1 is the installation site figure of a kind of wet desulphurization spiral-flow type demister.
Fig. 2 is the structural representation of a kind of wet desulphurization spiral-flow type demister.
Fig. 3 is the blade shape expanded view of a kind of wet desulphurization spiral-flow type demister.
Fig. 4 is inner side fastener constructions schematic diagram.
Fig. 5 is outside fastener constructions schematic diagram.
In figure: 1-supports outer ring；2-supports inner ring；3-blade；Securing member inside 4-；Securing member outside 5-；6-bolt.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " on ", D score, "front", "rear", " left ",
Orientation or the position relationship of the instruction such as " right ", " vertically ", " level ", " top ", " end " " interior ", " outward " are based on side shown in the drawings
Position or position relationship, be for only for ease of and describe the present invention and simplify description rather than instruction or the device of hint indication or unit
Part must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For this area
For those of ordinary skill, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
Such as Fig. 1-5, a kind of wet desulphurization spiral-flow type demister, including: support outer ring 1, be positioned in the middle part of support outer ring 1
Supporting inner ring 2 and blade 3, described blade 3 is fan-shaped, and described support outer ring 1 is equal with the height of described support inner ring 2；Described
The a end of sector 3 is along supporting inner ring 2 arc-shaped recliner and uniformly being fixed by inner side securing member 4；The b end of described sector 3
Extend to support outer ring 1 through skew torsion firm with outside securing member 5；Described support outer ring 1 is by one piece of rectangular steel plates welding
Become；Support inner ring 2 to be closed be welded by one piece of rectangular steel plates and two blocks of circular steel plates；Described inner side securing member 4, outside fastening
Part 5 is made up of arc-shaped angle steel and bolt 6；Described spiral-flow type demister is arranged on the bottom of desulfurizing tower chimney, and single component is successively
Install, or fall into chimney bottom after chimney is the most self-contained；Described blade 3 and chimney inner support beam glass fiber are wound around solid
Fixed.
Described a end blade 3 upper point vertically point in bottom, the point of a end blade 3 bottom, with a end blade 3 upper point institute
The central angle formed is 20-25 °；Described b end blade 3 upper point vertically point in bottom, the point of b end blade 3 bottom, with b end
The central angle that blade 3 upper point is formed is 15-20 °；Material used by the rectangular steel plates of described support outer ring 1 be 2205 or
1.4529 rustless steels, thickness at least 10mm；Material used by one piece of rectangular steel plates of described support inner ring 2 and two blocks of circular steel plates is
2205 or 1.4529 rustless steels, thickness at least 10mm；The sheet number of described blade 3 is even slice, and sum is not more than 20, by 2205
1.4529 corrosion resistant plate cutting or setting-out form, thickness is at least 10mm；Described blade 3 size, setting angle, angle of inclination
Unanimously；Arc-shaped angle steel used by described inner side securing member 4, outside securing member 5 is 2205 or 1.4529 rustless steels, bolt used
For 316L.
Technical solution of the present invention has been succeeded application in the 2x300t/h desulfurizing fume of coalpowder boiler project of Cangzhou,
After testing, before flue gas enters spiral-flow type demister, i.e. during flue gas transition, exhaust gas volumn is 36.5 ten thousand Nm3/H, drop diameter is 100
~ 1000 μm, minority is more than 2000 μm.Additionally, the large water droplet that flue gas is carried secretly can bump against on flue and chimney wall, wall condenses
Liquid combines, and is again brought into flue gas, and these liquid-drop diameters being again carried over are generally in 1000～5000 μm.
Through spiral-flow type demister proposed by the invention, go out at chimney breast, drop in flue gas carried out detection and has analyzed,
Test shows, demister reaches 100% to drop clearance more than particle diameter 100 μm.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
These embodiments can be carried out multiple change in the case of departing from the principle of the present invention and objective, revise, replace and modification, this
The scope of invention is limited by claim and equivalent thereof.
Claims (8)
1. a wet desulphurization spiral-flow type demister, including: support outer ring (1), be positioned at the support supported in the middle part of outer ring (1)
Circle (2) and blade (3), it is characterised in that described blade (3) is fan-shaped, described support outer ring (1) and described support inner ring (2)
The most equal；The a end of described sector (3) is along supporting inner ring (2) arc-shaped recliner and passing through inner side securing member (4) uniformly admittedly
Fixed；It is firm with outside securing member (5) that the b end of described sector (3) extends to support outer ring (1) through skew torsion；Described
Support outer ring (1) is welded by one piece of rectangular steel plates；Support inner ring (2) and closed weldering by one piece of rectangular steel plates and two blocks of circular steel plates
Connect and form；Described inner side securing member (4), outside securing member (5) are made up of arc-shaped angle steel and bolt (6)；Described spiral-flow type removes mist
Device is arranged on the bottom of desulfurizing tower chimney, and single component is installed successively, or falls into chimney bottom after chimney is the most self-contained.
A kind of wet desulphurization spiral-flow type demister the most according to claim 1, it is characterised in that described a end blade (3)
Upper point vertically point in bottom, the point of a end blade (3) bottom, the central angle formed with a end blade (3) upper point is 20-
25°。
A kind of wet desulphurization spiral-flow type demister the most according to claim 1, it is characterised in that described b end blade (3)
Upper point vertically point in bottom, the point of b end blade (3) bottom, the central angle formed with b end blade (3) upper point is 15-
20°。
A kind of wet desulphurization spiral-flow type demister the most according to claim 1, it is characterised in that described support outer ring
(1) material used by rectangular steel plates is 2205 or 1.4529 rustless steels, thickness at least 10mm.
A kind of wet desulphurization spiral-flow type demister the most according to claim 1, it is characterised in that described support inner ring (2)
One piece of rectangular steel plates and two blocks of circular steel plates used by material be 2205 or 1.4529 rustless steels, thickness at least 10mm.
A kind of wet desulphurization spiral-flow type demister the most according to claim 1, it is characterised in that the sheet of described blade (3)
Number is even slice, and sum is not more than 20,2205 or 1.4529 corrosion resistant plate cuttings or setting-out form, and thickness is at least
10mm；Described blade (3) size, setting angle, angle of inclination are consistent.
A kind of wet desulphurization spiral-flow type demister the most according to claim 1, it is characterised in that described inner side securing member
(4) arc-shaped angle steel, used by outside securing member (5) is 2205 or 1.4529 rustless steels, and bolt used is 316L.
A kind of wet desulphurization spiral-flow type demister the most according to claim 1, it is characterised in that in blade (3) and chimney
Support beam glass fiber is fastened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610690100.0A CN106310793A (en) | 2016-08-19 | 2016-08-19 | Swirling flow type demister for wet desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610690100.0A CN106310793A (en) | 2016-08-19 | 2016-08-19 | Swirling flow type demister for wet desulfurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106310793A true CN106310793A (en) | 2017-01-11 |
Family
ID=57744490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610690100.0A Pending CN106310793A (en) | 2016-08-19 | 2016-08-19 | Swirling flow type demister for wet desulfurization |
Country Status (1)
| Country | Link |
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| CN (1) | CN106310793A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534377A (en) * | 2022-02-14 | 2022-05-27 | 山东莱钢永锋钢铁有限公司 | Device for reducing carrying of water drops of wet desulphurization direct-exhaust chimney and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201042655Y (en) * | 2007-05-30 | 2008-04-02 | 胡俊华 | Rotational flow plate defroster |
| CN202555093U (en) * | 2012-05-28 | 2012-11-28 | 山东国舜建设集团有限公司 | Special wet flue gas dehydrator for desulfurization engineering |
| CN105107277A (en) * | 2015-09-16 | 2015-12-02 | 佛山赛因迪环保科技有限公司 | Demister for desulfurization tower |
| CN205995156U (en) * | 2016-08-19 | 2017-03-08 | 中钢集团天澄环保科技股份有限公司 | A kind of wet desulphurization spiral-flow type demister |
-
2016
- 2016-08-19 CN CN201610690100.0A patent/CN106310793A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201042655Y (en) * | 2007-05-30 | 2008-04-02 | 胡俊华 | Rotational flow plate defroster |
| CN202555093U (en) * | 2012-05-28 | 2012-11-28 | 山东国舜建设集团有限公司 | Special wet flue gas dehydrator for desulfurization engineering |
| CN105107277A (en) * | 2015-09-16 | 2015-12-02 | 佛山赛因迪环保科技有限公司 | Demister for desulfurization tower |
| CN205995156U (en) * | 2016-08-19 | 2017-03-08 | 中钢集团天澄环保科技股份有限公司 | A kind of wet desulphurization spiral-flow type demister |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534377A (en) * | 2022-02-14 | 2022-05-27 | 山东莱钢永锋钢铁有限公司 | Device for reducing carrying of water drops of wet desulphurization direct-exhaust chimney and construction method |
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Application publication date: 20170111 |
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