CN105289180A - Air-cooled aerofoil profile elliptical pipe bundles demister and demisting method thereof - Google Patents
Air-cooled aerofoil profile elliptical pipe bundles demister and demisting method thereof Download PDFInfo
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- CN105289180A CN105289180A CN201510767475.8A CN201510767475A CN105289180A CN 105289180 A CN105289180 A CN 105289180A CN 201510767475 A CN201510767475 A CN 201510767475A CN 105289180 A CN105289180 A CN 105289180A
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Abstract
The invention discloses an air-cooled aerofoil profile elliptical pipe bundles demister and a demisting method thereof. The air-cooled aerofoil profile elliptical pipe bundles demister comprises an aerofoil profile elliptical pipe bundles demisting system arranged at top of a desulfurization tower, and a cooling air automatic diversion system used for introducing cold air in the aerofoil profile elliptical pipe bundles demisting system. The aerofoil profile elliptical pipe bundles demisting system comprises pipe bundles formed by the bundles with multilayer lattice staggered arrangement and having elliptical cross sections; arc wings are symmetrically arranged at two sides of the elliptical pipe bundles, a grading orientation wash water system is composed of several nozzles with layered and array arrangement capable of injecting water flow downwardly between aerofoil profile elliptical pipe bundles and several nozzles arranged along the tangent direction of arc wings capable of injecting water flow upwardly in an orientation mode; and the cooling air automatic diversion system comprises several wind direction fluid directors respectively arranged at an windward end and a leeward end. The demister combines inertia separating, centrifugation and condensation separating, and has the characteristics of high demisting and dedusting efficiency, less energy consumption, and no blind angle for flushing; and gypsum rain generated due to desulphurization of flue gas can be effectively reduced.
Description
Technical field
The present invention relates to the flue gas demist in wet flue gas desulfurizer, particularly relate to a kind of air-cooled aerofoil profile ellipse tube type demister and defogging method thereof.
Background technology
Primary energy coal is converted in the power production process of secondary energy sources by coal-burning power plant, can produce atmosphere pollution SO
2.SO
2a large amount of discharges bring the harm of serious acid rain and haze weather, also result in and administer pressure greatly.Also there is the pressure of flue gas desulfurization in the industries such as metallurgy, cement, petrochemical industry.Therefore, auxiliary construction desulfurizer, improves the sustainable development of desulfur technology to coal-burning utilities significant.
At present, domestic extensive employing wet desulfurization of flue gas by limestone-gypsum method technology.But the flue gas after desulfurizing tower process has carried certain droplet secretly, particularly when the flow velocity of flue gas is higher, flue gas carries droplet amount will be aggravated, and be formed " mist " that particle diameter is 2 ~ 60 μm." mist " not only containing moisture, is also dissolved with sulfuric acid, sulfate, SO
2and other subparticle.If do not manage removing, these droplet particles just can be deposited on the exhaust pass inner surface of desulfurizing tower, cause the Corrosion blockage of equipment; Or be discharged to chimney with flue gas, enter air.Because many desulfurizers do not adopt GGH, the neat stress temperature after desulfurization is too low, droplet along with flue gas enters air can sedimentation around chimney, produce " gypsum rain ".Therefore desulphurization system takes corresponding measure to administer " gypsum rain " just to become particularly important and urgent in design and running process.
Demister is generally arranged in desulfurization tower top or neat stress exhaust pass, effectively can reduce the discharge of flue gas fine particle.Demister common in engineering has Flat defroster, ridge type demister, tubular demister, screen cloth demister, cyclone demister, electrostatic precipitator etc.Wherein conventional tube demister is remarkable to the large droplet removal effect of particle diameter more than 400 μm, and resistance is little, but poor to the removal effect of little droplet, under slight drag, how to develop the important directions that efficient tubular demister is the development of current demister.
Summary of the invention
The object of the invention is to solve that traditional demister demist efficiency of dust collection is low, the resistance of flow of flue gas is comparatively large and rinse insufficient problem, provides a kind of air-cooled aerofoil profile ellipse tube type demister and defogging method thereof.
The present invention is achieved through the following technical solutions:
A kind of air-cooled aerofoil profile ellipse tube type demister, comprises the aerofoil profile elliptic tubes demister system being arranged on desulfurizing tower top, and for cold wind being introduced the cooling air auto-guiding system in aerofoil profile elliptic tubes demister system;
The a tube row that the ellipsoidal cross section tube bank 1 that described aerofoil profile elliptic tubes demister system is arranged by the stagger arrangement of multilayer dot matrix is formed, is provided with arc assistant 1-1 in the bilateral symmetry of each ellipse tube bank 1; The two ends of each ellipse tube bank 1 are supported on tube sheet 2 respectively.
The major axis B of described ellipse tube bank 1 cross section is 1.5 ~ 2.5 times of minor axis A, and arc assistant 1-1 place radius of a circle C is 0.8 ~ 1.5 times of minor axis A; Flue gas stream enters from the bottom of a tube row, then is discharged by the top of a tube row.
Described cooling air auto-guiding system, comprises the multiple wind direction air deflectors 4 being separately positioned on a tube row windward side 11 and leeward end 12 and forms;
Each wind direction air deflector 4 comprises support bar 10, is arranged on support bar 10 with the deflector 9 of transmission device, the horizontal rotary bull stick 6 being arranged on support bar 10 end, the tapered rod head 5 being arranged on horizontal rotary bull stick 6 end, the empennage 8 being arranged on horizontal rotary bull stick 6 afterbody and the balance plate 7 be arranged on horizontal rotary bull stick 6;
Under the interaction of wind direction air deflector 4 between empennage 8 and cold wind air-flow, horizontal rotary bull stick 6 is made freely to turn to the direction consistent with cold wind wind direction; Cold wind air-flow, under the drainage of deflector 9, is flowed in oval tube bank 1 by the windward side 11 of a tube row, then flows out oval tube bank 1 by the leeward end 12 of a tube row.
Described empennage 8 is made up of symmetrical two pieces of trapezoidal plates, two pieces of trapezoidal plate combinations in " V " font.
Described aerofoil profile elliptic tubes demister system also comprises a directed circulation flushing water system for rinsing a tube row.
Described directed circulation flushing water system comprises layering, arranged in arrays at the nozzle 3 of each ellipse tube bank 1 Jet with downward flow direction current and the arcuately nozzle 3 of orientation upwards injection water arranged of assistant 1-1 internal tangent direction.
A kind of air-cooled aerofoil profile ellipse tube type defogging method is as follows:
Wind direction air deflector 4 utilizes the interaction between empennage 8 and cold wind air-flow, horizontal rotary bull stick 6 is freely turned to and flows to consistent direction with cold wind; Cold wind air-flow, under the drainage of deflector 9, flows in oval tube bank 1 by the windward side 11 of a tube row; Flue gas enters from the bottom of a tube row and streams, flue gas mutually converges at arc assistant 1-1 place and forms eddy current, make the flow trace continuous deviation of flue gas between ellipse tube bank 1, partial particulate entrained in flue gas constantly clashes into the outside wall surface of arc assistant 1-1 and oval tube bank 1 under the effect of inertia force, is separated with flue gas; There is the temperature difference with the oval cold wind flowed in 1 of restraining in flue gas, make entrained saturated vapor produce condensation in the outside wall surface of ellipse tube bank 1, part subparticle, with steam, coalescence occurs, and is separated with flue gas.
The flue gas participated in after heat exchange is discharged from the top of a tube row, and cold wind then flows out oval tube bank 1 by the leeward end 12 of a tube row, is down the wind disposed in air.
The present invention, relative to prior art, has following advantage and effect:
(1) high-effective dust-removing demist: oval tube bank peripheral hardware has arc assistant, and oval tube bank is staggered in arrangement for dot matrix, produces certain effect to the flow-disturbing of flue gas.The flue gas that a part flows in the tortuous passageway of oval pipe interfascicular alternating contractions and expansion and a part of flue gas flowed near arc assistant converge formation eddy current mutually, flue gas rises with the deflection of the form of whirlpool, subparticle constantly clashes into tube wall and assistant surface under the combination of centrifugal force and inertia force, effectively increase impact rate, improve the problem that conventional tubular demister cannot remove subparticle, demist efficiency of dust collection is higher;
(2) high-efficiency condensation heat exchange: introduce sub-cooled air in ellipse tube bank, in unit circulation area, flue gas is larger with oval contact area of restraining, and achieves the efficient coalescence of fine particle in saturated wet flue gas;
(3) save energy consumption: the flexible rotating of wind direction air deflector by horizontal rotary bull stick and the interaction of empennage and air-flow, can adjust water conservancy diversion angle automatically, efficiently sub-cooled air is introduced in oval tube bank.This wind direction air deflector has adaptivity, there is not extra energy input, greatly saves operating cost;
(4) not easily fouling is blocked: oval pipe harness has mild radian, and self-cleaning function is good.This aerofoil profile elliptic tubes demister system is also furnished with the nozzle that multistage orientation is rinsed, and achieves the high-efficiency rinsing mode of classification circulation.In a tube row, multiply flushing water from top to bottom constantly converges and forms circulation flushing water, achieves the comprehensive flushing on arc assistant and oval tube bank surface, effectively solves conventional tubular demister and easily blocks, there is the problem of rinsing dead band.
(5) water-saving result is good: the steam entering air in traditional sulfur removal technology in a large number, by condensation, reclaims, reduces the water consumption of desulphurization system by this demister.
Accompanying drawing explanation
Fig. 1 is aerofoil profile elliptic tubes demister system structure sectional view of the present invention.
Fig. 2 is the ellipse tube bank cross sectional representation of bilateral symmetry of the present invention with arc assistant.
Fig. 3 is the present invention's multiple wind direction flow-guiding device structure schematic diagram.
Fig. 4 is the present invention's air-cooled aerofoil profile ellipse tube type demister plan structure schematic diagram.
Fig. 5 is classification of the present invention directed flushing water system flushing process schematic diagram.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Fig. 1 to 5.The invention discloses a kind of air-cooled aerofoil profile ellipse tube type demister, comprise the aerofoil profile elliptic tubes demister system being arranged on desulfurizing tower top, and for cold wind being introduced the cooling air auto-guiding system in aerofoil profile elliptic tubes demister system;
The a tube row that the ellipsoidal cross section tube bank 1 that described aerofoil profile elliptic tubes demister system is arranged by the stagger arrangement of multilayer dot matrix is formed, is provided with arc assistant 1-1 in the bilateral symmetry of each ellipse tube bank 1; The two ends of each ellipse tube bank 1 are supported on tube sheet 2 respectively.
The major axis B of described ellipse tube bank 1 cross section is 1.5 ~ 2.5 times of minor axis A, and arc assistant 1-1 place radius of a circle C is 0.8 ~ 1.5 times of minor axis A; Flue gas stream enters from the bottom of a tube row, then is discharged by the top of a tube row.
Described cooling air auto-guiding system, comprises the multiple wind direction air deflectors 4 being separately positioned on a tube row windward side 11 and leeward end 12 and forms;
Each wind direction air deflector 4 comprises support bar 10, is arranged on support bar 10 with the deflector 9 of transmission device, the horizontal rotary bull stick 6 being arranged on support bar 10 end, the tapered rod head 5 being arranged on horizontal rotary bull stick 6 end, the empennage 8 being arranged on horizontal rotary bull stick 6 afterbody and the balance plate 7 be arranged on horizontal rotary bull stick 6;
Under the interaction of wind direction air deflector 4 between empennage 8 and cold wind air-flow, horizontal rotary bull stick 6 is made freely to turn to the direction consistent with cold wind wind direction; Cold wind air-flow, under the drainage of deflector 9, is flowed in oval tube bank 1 by the windward side 11 of a tube row, then flows out oval tube bank 1 by the leeward end 12 of a tube row.
Described empennage 8 is made up of symmetrical two pieces of trapezoidal plates, two pieces of trapezoidal plate combinations in " V " font.
Described aerofoil profile elliptic tubes demister system also comprises a directed circulation flushing water system for rinsing a tube row.
Described directed circulation flushing water system comprises layering, arranged in arrays at the nozzle 3 of each ellipse tube bank 1 Jet with downward flow direction current and the arcuately nozzle 3 of orientation upwards injection water arranged of assistant 1-1 internal tangent direction.
Inertial separation, centrifugation, phase transformation separation principle combine by the present invention, outside ellipse tube bank 1, add arc assistant 1-1, introduce the cooling-air of low temperature, to realize efficient demist in ellipse tube bank 1.When flue gas with certain flow rate through a tube row, because parallel being staggered in arrangement of each ellipse tube bank 1 constitutes narrow, tortuous exhaust gases passes, the flow velocity of flue gas and the flow direction are changed, the continuous deviation of flow trace and racing, and form centrifugal vortex bundle and eddy flow at arc assistant 1-1 place.Droplet and subparticle due to density large, poor to the followability of flue gas, under the compound action of centrifugal force with inertia force, clash into arc assistant 1-1 and ovally restrain the outside wall surface of 1 and be separated with flue gas; The flue gas that temperature is higher also exists certain temperature difference with the oval 1 inner cooling-air constantly flowed of restraining, and flue gas carries out condensation heat transfer in the outside wall surface of ellipse tube bank 1, and carrying capacity reduces.Fractional saturation steam release latent heat, continuous condensation is gathered into saturated drop, and restrains 1 outside wall surface generation coalescence with the subparticle that carries in flue gas at ellipse, effectively achieves gas-liquid separation.
The present invention adopts directed circulation flushing water system, and the flushing water impact of spraying vertically downward is to shunting about during oval tube bank 1 and continue along smooth ellipse tube bank 1 surface the upper surface rinsing arc assistant 1-1 downwards; The current that arcuately assistant 1-1 internal tangent direction is upwards sprayed rinse the lower surface of arc assistant 1-1.Current are large due to impulse force, can upwards continue to rinse under the effect of inertia force and along under the wall flow of ellipse tube bank 1, form the flushing circulation around arc assistant 1-1 inner surface.Directed circulation flushing water system is eliminated and is rinsed dead angle, effectively can remove and remain in dust and dirt in arc assistant 1-1 and oval tube bank 1 and slurries, improve the cleannes of aerofoil profile elliptic tubes demister system entirety.
The present invention utilizes the principle of equalising torque, is provided with (wind vane) wind direction air deflector 4.Empennage 8 is made up of two pieces of symmetrical trapezoidal plates in " V " font, due to the existence of angle, reduces wind direction air deflector 4 because of self inertia and rotates the unstable air inducing phenomenon brought.There is moment of torsion between empennage 8 and support bar 10 end, when natural airflow is aweather to air deflector 4, empennage 8 produces rotating torques with the interphase interaction of air-flow, and horizontal rotary bull stick 6 can be driven to automatically rotate to the direction consistent with air flow direction according to the size of torque.Wind direction air deflector 4 has the adaptivity of height and without electric energy and other energy consumption, when wind speed is less or change of the wind is little, can follow wind direction fast all the time, effectively improve the Drug delivery rate of cooling-air.
The defogging method of the present invention's air-cooled aerofoil profile ellipse tube type demister, realizes by following steps:
Wind direction air deflector 4 utilizes the interaction between empennage 8 and cold wind air-flow, horizontal rotary bull stick 6 is freely turned to and flows to consistent direction with cold wind; Cold wind air-flow, under the drainage of deflector 9, flows in oval tube bank 1 by the windward side 11 of a tube row; Flue gas enters from the bottom of a tube row and streams, flue gas mutually converges at arc assistant 1-1 place and forms eddy current, make the flow trace continuous deviation of flue gas between ellipse tube bank 1, partial particulate entrained in flue gas constantly clashes into the outside wall surface of arc assistant 1-1 and oval tube bank 1 under the effect of inertia force, is separated with flue gas; There is the temperature difference with the oval cold wind flowed in 1 of restraining in flue gas, make entrained saturated vapor produce condensation in the outside wall surface of ellipse tube bank 1, part subparticle, with steam, coalescence occurs, and is separated with flue gas.
The flue gas participated in after heat exchange is discharged from the top of a tube row, and cold wind then flows out oval tube bank 1 by the leeward end 12 of a tube row, is down the wind disposed in air.
As mentioned above, just the present invention can be realized preferably.
Embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. an air-cooled aerofoil profile ellipse tube type demister, is characterized in that, comprises the aerofoil profile elliptic tubes demister system being arranged on desulfurizing tower top, and for cold wind being introduced the cooling air auto-guiding system in aerofoil profile elliptic tubes demister system;
The a tube row that ellipsoidal cross section tube bank (1) that described aerofoil profile elliptic tubes demister system is arranged by the stagger arrangement of multilayer dot matrix is formed, is provided with arc assistant (1-1) in the bilateral symmetry of each ellipse tube bank (1); The two ends of each ellipse tube bank (1) are supported on tube sheet (2) respectively.
2. air-cooled aerofoil profile ellipse tube type demister according to claim 1, it is characterized in that, the major axis B of described ellipse tube bank (1) cross section is 1.5 ~ 2.5 times of minor axis A, and arc assistant (1-1) place radius of a circle (C) is 0.8 ~ 1.5 times of minor axis (A); Flue gas stream enters from the bottom of a tube row, then is discharged by the top of a tube row.
3. air-cooled aerofoil profile ellipse tube type demister according to claim 2, it is characterized in that, described cooling air auto-guiding system, comprises the multiple wind direction air deflectors (4) being separately positioned on a tube row windward side (11) and leeward end (12) and forms;
Each wind direction air deflector (4) comprises support bar (10), is arranged on support bar (10) with the deflector (9) of transmission device, the horizontal rotary bull stick (6) being arranged on support bar (10) end, the tapered rod head (5) being arranged on horizontal rotary bull stick (6) end, the empennage (8) being arranged on horizontal rotary bull stick (6) afterbody and the balance plate (7) be arranged on horizontal rotary bull stick (6);
Under the interaction of wind direction air deflector (4) between empennage (8) and cold wind air-flow, horizontal rotary bull stick (6) is made freely to turn to the direction consistent with cold wind wind direction; Cold wind air-flow is under the drainage of deflector (9), flowed in oval tube bank (1) by the windward side (11) of a tube row, then flow out oval tube bank (1) by the leeward end (12) of a tube row.
4. air-cooled aerofoil profile ellipse tube type demister according to claim 3, it is characterized in that, described empennage (8) is made up of symmetrical two pieces of trapezoidal plates, two pieces of trapezoidal plates combinations in " V " font.
5. air-cooled aerofoil profile ellipse tube type demister according to any one of Claims 1-4, is characterized in that, described aerofoil profile elliptic tubes demister system also comprises a directed circulation flushing water system for rinsing a tube row.
6. air-cooled aerofoil profile ellipse tube type demister according to claim 5, it is characterized in that, described directed circulation flushing water system comprises layering, the nozzle (3) of arranged in arrays Jet with downward flow direction current between each ellipse tube bank (1) and the nozzle (3) of the arcuately orientation upwards injection water of assistant (1-1) internal tangent direction layout.
7. an air-cooled aerofoil profile ellipse tube type defogging method, it is characterized in that adopting air-cooled aerofoil profile ellipse tube type demister according to any one of claim 1 to 6 to realize, concrete steps are as follows:
Wind direction air deflector (4) utilizes the interaction between empennage (8) and cold wind air-flow, horizontal rotary bull stick (6) is freely turned to and flows to consistent direction with cold wind; Cold wind air-flow, under the drainage of deflector (9), flows in oval tube bank (1) by the windward side (11) of a tube row; Flue gas enters from the bottom of a tube row and streams, flue gas converges formation eddy current mutually at arc assistant (1-1) place, make the flow trace continuous deviation of flue gas between ellipse tube bank (1), partial particulate entrained in flue gas constantly clashes into the outside wall surface of arc assistant (1-1) and oval tube bank (1) under the effect of inertia force, is separated with flue gas; There is the temperature difference with the oval cold wind flowed in (1) of restraining in flue gas, make entrained saturated vapor produce condensation in the outside wall surface of ellipse tube bank (1), part subparticle, with steam, coalescence occurs, and is separated with flue gas;
The flue gas participated in after heat exchange is discharged from the top of a tube row, and cold wind then flows out oval tube bank (1) by the leeward end (12) of a tube row, is down the wind disposed in air.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510767475.8A CN105289180B (en) | 2015-11-11 | 2015-11-11 | A kind of air-cooled aerofoil profile ellipse tube type demister and its defogging method |
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| CN201510767475.8A CN105289180B (en) | 2015-11-11 | 2015-11-11 | A kind of air-cooled aerofoil profile ellipse tube type demister and its defogging method |
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| CN105289180B CN105289180B (en) | 2017-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508399A (en) * | 2019-09-30 | 2019-11-29 | 南京江宁区上峰国银标准件厂 | A kind of electric precipitation case of array chip |
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| CN102011686A (en) * | 2009-09-04 | 2011-04-13 | 邱金和 | Wind-guiding device for vertical spindled windmill generator |
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| CN104815501A (en) * | 2015-04-08 | 2015-08-05 | 华南理工大学 | Multichannel-type composite demister and demisting method |
| CN205145880U (en) * | 2015-11-11 | 2016-04-13 | 华南理工大学 | Oval tubular defroster of forced air cooling wing section |
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Patent Citations (5)
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| CN101520031A (en) * | 2009-04-03 | 2009-09-02 | 哈尔滨工程大学 | Vertical-axis wind-driven dynamo of variable-pitch resistance and lift mixed type |
| CN102011686A (en) * | 2009-09-04 | 2011-04-13 | 邱金和 | Wind-guiding device for vertical spindled windmill generator |
| CN203725020U (en) * | 2014-02-27 | 2014-07-23 | 殷显伟 | Storage tank type demisting, dust-collection and size-removal device and demister |
| CN104815501A (en) * | 2015-04-08 | 2015-08-05 | 华南理工大学 | Multichannel-type composite demister and demisting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110508399A (en) * | 2019-09-30 | 2019-11-29 | 南京江宁区上峰国银标准件厂 | A kind of electric precipitation case of array chip |
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