CN105854427A - Demister blade and demister - Google Patents
Demister blade and demister Download PDFInfo
- Publication number
- CN105854427A CN105854427A CN201610371078.3A CN201610371078A CN105854427A CN 105854427 A CN105854427 A CN 105854427A CN 201610371078 A CN201610371078 A CN 201610371078A CN 105854427 A CN105854427 A CN 105854427A
- Authority
- CN
- China
- Prior art keywords
- demister
- blade
- barb
- flue gas
- demister blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
The invention provides a demister blade and a demister. The section of the demister blade is bulge-shaped along the direction of airflow passing through the demister blade; a bulge-shaped convex groove side is provided with a barb; in addition, a bulge-shaped groove side is provided with a barb; an opening side of the barb faces towards the direction into which airflow flows. By virtue of the demister blade and the demister, during low flow speed of flue gas, the additionally arranged barb at the groove side is capable of catching small droplets in the flue gas and improving the removal efficiency. When the flow speed of the flue gas is higher than the critical speed, large droplets in high-speed flue gas impact on a liquid film gathered on the blade and small droplets flash, the additionally arranged barb at the groove side is capable of effectively catching flashing small droplets and small droplets carried in high-speed flue gas, and weakening secondary carrying of the flue gas.
Description
Technical field
The present invention relates to exhaust equipment technical field, especially relate to coal-burning power plant's air draft and set
Standby mechanical part.
Background technology
The flue gas that thermal power plant gives off contains SO2, SO2Be main atmosphere pollution it
One, not only the health of people and plant can be caused serious harm, also can cause acid rain, harm is raw
State system, accelerates the corrosion of the materials such as building, engineering equipment.The environmental regulation of increasingly stringent is wanted
Look for novelty and build thermal power generation unit and must go up desulphurization system.Wet desulfurization of flue gas by limestone-gypsum method
(WFGD) technology is due to low cost, stability height and desulfuration efficiency advantages of higher, is current
Apply to obtain a widest desulfurization technology in the world.Wet desulfurization of flue gas by limestone-gypsum method work
Skill as it is shown in figure 1, but flue gas-flue gas in Limestone-gypsum Wet Flue Gas Desulfurization Process system again
Hot device GGH plant failure is more, due to blocking and serious wear, greatly have impact on desulfurization
The safety of unit and economy.After 2006, at Chinese newly-built unit the most not
Use flue gas-smoke re-heater GGH.The cancellation of flue gas-smoke re-heater GGH brings
Serious gypsum rain problem, have impact on safety and surrounding enviroment that power plant runs.
At the limestone-plaster wet desulfurizing system without GGH, neat stress with through spray
Mouth atomization after gypsum slurries collisional mixing after, carry a large amount of drop, these drops rich in
Ca(OH)2、CaSO3And CaSO4Deng material.The flue gas flow rate carrying a large amount of drop is removing
Skewness on day with fog cross section, causes region flue gas flow rate to exceed critical velocity, causes secondary to take
Band, is substantially reduced demister efficiency.Flue gas at a high speed is entered air by chimney, forms neat stress
Band slurry phenomenon, produces gypsum rain.Therefore, the liquid of neat stress is controlled by weakening secondary droplets
Drip carrying amount, the generation of gypsum rain can be prevented effectively from.
At present, lower drop carrying amount in flue gas to complete generally by demister.Common
Demister template has broken line plate and arcuate zone barb plate.Demister by inertial collision, directly
Intercept and 3 kinds of mechanism capture drops of diffusion.After flue gas enters demister, flow to change.Drop
Impinge upon under centrifugal action on wall head-on.Liquid under sweep of gases effect, on wall
Film collects the thicker cascade tailing edge wall of formation and flows down, thus reaches to remove purpose.
If size droplet diameter is less than 15 microns, then drop can directly pass through demister with flue gas
Blade.During it addition, flue gas flow rate is more than the critical flow velocity of demister, demister generation secondary is taken
Band, big droplet impact blade, sputter multiple droplet, additionally on sweep of gases blade surface
Liquid film, roll and take away droplet.The factor of impact " Gypsum Fibrosum " is mainly demister performance,
And demister performance is played an important role by blade profile.Therefore, the actual moving process of desulphurization system
In, demister except fog effect unsatisfactory, simple use broken line plate and arcuate zone barb plate
Formula demister reduces droplet content in flue gas it cannot be guaranteed that the safety and economic operation of desulphurization system.
Summary of the invention
Because the demister of prior art exists and is susceptible to secondary droplets, pays no attention to except fog effect
The problem thinking, being difficult to ensure that the safety and economic operation of desulphurization system.The present invention proposes one and subtracts
The high efficiency demister blade of little secondary droplets and demister, to realize improving the safety of desulphurization system
Efficiency of economic operations, increase are except the purpose of fog effect.
In order to realize this purpose, the technical scheme that the present invention takes is as follows.
A kind of demister blade, described demister blade is along the airflow direction cross section shape wherein passed through
Shape is convex, and the tongue side of described convex shape is provided with barb, wherein said convex shape recessed
Groove side is also equipped with barb, the direction that the open side of described barb flows into towards air-flow.
In order to improve intensity and corrosion resistance, described demister blade material uses polypropylene material
Material.
The thickness of described demister blade is between 1-4 millimeter.
The radius value of described barb is between 10-15 millimeter.
The central angle number of degrees that described barb is corresponding are between 15-25 degree.
It is spaced apart it addition, the described barb of tongue side and the barb of groove side prolong air-flow inflow direction
20 millimeters.
Wherein, the surface roughness profile arithmetic average deviation of described demister blade is less than
0.64。
Especially, the surface roughness profile arithmetic average deviation of described demister blade is less than
0.32。
A kind of demister, including inlet side, air side, installs between inlet side and air side
There is the demister blade described in a piece of above claim 1.
By using demister blade and the demister of the present invention, it is possible to realize following useful effect
Really:
1, when flue gas flow rate is low, newly-increased groove side barb can catch collect in flue gas little
Drop, improves removal efficiency.
2, when flue gas flow rate is higher than critical velocity, the big droplet impact blade in high velocity smoke
The liquid film of upper gathering, causes droplet to splash, and newly-increased groove side barb can catch effectively
Splash the droplet got up and the droplet that carries of high velocity smoke, weakens the secondary droplets of flue gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of wet desulfurization of flue gas by limestone-gypsum method technique.
Fig. 2 is the schematic shapes of demister blade in the specific embodiment of the invention.
Fig. 3 is the schematic shapes of demister blade in the specific embodiment of the invention.
Fig. 4 is the barb shape schematic diagram of demister blade in the specific embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the present invention is elaborated.
The example embodiment that following discloses are detailed.But, concrete structure disclosed herein and merit
Energy details is merely for the sake of the purpose describing example embodiment.
It should be appreciated, however, that the present invention is not limited to disclosed particular exemplary embodiment, and
It is all modifications, equivalent and the alternative in the range of covering falls into the disclosure.To all
In the description of accompanying drawing, identical reference represents identical element.
It will also be appreciated that term "and/or" includes one or more phase as used in this
Any and all combination listing item closed.It will further be appreciated that when parts or unit are claimed
For " connection " or during " coupled " to another parts or unit, it can be directly connected to or coupling
Receive miscellaneous part or unit, or intermediate member or unit can also be there is.Additionally, use
Describe other words of relation between parts or unit should understand in the same fashion
(such as, " and between " to " directly between ", " adjacent " to " direct neighbor " etc.).
As in figure 2 it is shown, the invention discloses a kind of demister blade, described demister blade edge
The airflow direction cross sectional shape wherein passed through is convex, and the tongue side of described convex shape is provided with
Barb, the groove side of wherein said convex shape is also equipped with barb, the open side court of described barb
The direction flowed into air-flow.
Flue gas flow rate too high generation secondary droplets comes from following 2 reasons: the biggest droplet impact leaf
Sheet, sputters multiple droplet；2. the liquid film on sweep of gases blade surface, rolls and takes away
Droplet.Baffle plate type and arcuate zone fluking type demister are to utilize drop to collide with the surface of solids
And mist is condensed and traps, air-flow velocity skewness in desulfurizing tower, there is the biggest region to remove
Day with fog is in supercritical state environmental work.The shock of big drop and high velocity smoke wash away what volume was inhaled
Cause the secondary droplets of flue gas under comprehensive function, cause the WFGD system stone without GGH
The generation of cream rain.
The present invention uses increase groove side barb to improve removal efficiency, particularly can effectively subtract
The secondary droplets of weak flue gas.When flue gas flow rate is less than critical velocity, groove side barb can be effective
Catch the droplet collected in flue gas, improve removal efficiency.When flue gas flow rate is higher than critical velocity,
On the one hand in high velocity smoke, big droplet impact blade liquid film causes droplet to splash, newly-increased groove side
Barb can catch the droplet of getting up that splashes effectively.On the other hand high velocity smoke is along blade flow
Type flows, and enters newly-increased groove side barb, and the droplet entrained by flue gas can be caught by barb,
It is substantially reduced flue gas band liquid measure.Thus significantly reduce secondary droplets.
Because the working environment of demister blade is relatively severe, in order to improve intensity and anticorrosive
Property, described demister blade material uses polypropylene material.
In a detailed description of the invention, the thickness of described demister blade be 1-4 millimeter it
Between, so ensure that the intensity of demister blade, it also avoid obstruction air channel.
For in the drop capture-process of flue gas, in order to improve capturing efficiency, the half of described barb
Footpath value is between 10-15 millimeter.
The central angle number of degrees that described barb is corresponding are between 15-25 degree.
As it is shown on figure 3, the described barb of tongue side and the barb of groove side prolong air-flow inflow direction
It is spaced apart 20 millimeters.
In order to reduce the windage of demister blade, the surface roughness profile of described demister blade
Arithmetic average deviation Ra is less than 0.64.
Especially, the surface roughness profile arithmetic average deviation Ra of described demister blade is little
In 0.32.
It addition, the invention also discloses a kind of demister, including inlet side, air side, entering
Demister blade described in a piece of above claim 1 is installed between wind side and air side.
By using demister blade and the demister of the present invention, it is possible to realize following useful effect
Really:
1, when flue gas flow rate is low, newly-increased groove side barb can catch collect in flue gas little
Drop, improves removal efficiency.
2, when flue gas flow rate is higher than critical velocity, the big droplet impact leaf in high velocity smoke
The liquid film assembled on sheet, causes droplet to splash, and newly-increased groove side barb can be effectively
Catch the splash droplet got up and the droplet that carries of high velocity smoke, weaken the secondary of flue gas
Carry.
It should be noted that above-mentioned embodiment is only the present invention preferably embodiment, it is impossible to
It is understood as the restriction to distance protection scope of the present invention, without departing from present inventive concept premise
Under, any minor variations being the present invention belongs to the distance protection model of the present invention with modifying
Enclose.
Claims (9)
1. a demister blade, described demister blade is along the airflow direction cross section shape wherein passed through
Shape is convex, and the tongue side of described convex shape is provided with barb, it is characterised in that described convex
The groove side playing shape is also equipped with barb, the side that the open side of described barb flows into towards air-flow
To.
2. according to the demister blade described in claim 1, it is characterised in that described demister
Blade material uses polypropylene material.
3. according to the demister blade described in claim 1, it is characterised in that described demister
The thickness of blade is between 1-4 millimeter.
4. according to the demister blade described in claim 1, it is characterised in that described barb
Radius value is between 30-40 millimeter.
5. according to the demister blade described in claim 1, it is characterised in that described barb pair
The central angle number of degrees answered are between 15-25 degree.
6. according to the demister blade described in claim 1, it is characterised in that described tongue side
The barb of barb and groove side be spaced apart 20 millimeters along air-flow inflow direction.
7. according to the demister blade described in claim 1, it is characterised in that described demister
The surface roughness profile arithmetic average deviation of blade is less than 0.64.
8. according to the demister blade described in claim 7, it is characterised in that described demister
The surface roughness profile arithmetic average deviation of blade is less than 0.32.
9. a demister, including inlet side, air side, installs between inlet side and air side
There is the demister blade described in a piece of above claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371078.3A CN105854427A (en) | 2016-05-30 | 2016-05-30 | Demister blade and demister |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371078.3A CN105854427A (en) | 2016-05-30 | 2016-05-30 | Demister blade and demister |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105854427A true CN105854427A (en) | 2016-08-17 |
Family
ID=56641726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610371078.3A Pending CN105854427A (en) | 2016-05-30 | 2016-05-30 | Demister blade and demister |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105854427A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693571A (en) * | 2016-11-21 | 2017-05-24 | 国佳环境科技湖北连锁有限公司 | Phenolic resin waste gas treatment device and method |
| CN110354586A (en) * | 2019-08-21 | 2019-10-22 | 华北电力大学 | A kind of streamlined demister of fluoroplastics and demisting technique |
| CN111644004A (en) * | 2020-05-26 | 2020-09-11 | 戚永团 | Fusiform multiple spot formula smoke and dust greasy dirt absorption remove device of catching |
| CN113289415A (en) * | 2021-05-21 | 2021-08-24 | 海盐得胜化工设备有限公司 | Gas-liquid separator blade assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4581051A (en) * | 1982-10-12 | 1986-04-08 | Aktiebolaget Carl Munters | Apparatus for the separation of liquid drops or particulate solids from a gas stream |
| CN1919421A (en) * | 2006-08-11 | 2007-02-28 | 江苏德克环保设备有限公司 | Absorption tower demisting apparatus in flue gas desulfurization process |
| CN104548761A (en) * | 2015-01-06 | 2015-04-29 | 西安西热锅炉环保工程有限公司 | Arc panel double-hook channel demister |
| CN104740935A (en) * | 2015-03-25 | 2015-07-01 | 三河发电有限责任公司 | Streamline-type two-passage demister with optimized barb |
| CN204469404U (en) * | 2015-03-03 | 2015-07-15 | 山东天河科技有限公司 | Mining wet dust-collecting system demister |
| CN204699522U (en) * | 2015-05-28 | 2015-10-14 | 北京香源溪环保科技有限公司 | A kind of demister blade |
-
2016
- 2016-05-30 CN CN201610371078.3A patent/CN105854427A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4581051A (en) * | 1982-10-12 | 1986-04-08 | Aktiebolaget Carl Munters | Apparatus for the separation of liquid drops or particulate solids from a gas stream |
| CN1919421A (en) * | 2006-08-11 | 2007-02-28 | 江苏德克环保设备有限公司 | Absorption tower demisting apparatus in flue gas desulfurization process |
| CN104548761A (en) * | 2015-01-06 | 2015-04-29 | 西安西热锅炉环保工程有限公司 | Arc panel double-hook channel demister |
| CN204469404U (en) * | 2015-03-03 | 2015-07-15 | 山东天河科技有限公司 | Mining wet dust-collecting system demister |
| CN104740935A (en) * | 2015-03-25 | 2015-07-01 | 三河发电有限责任公司 | Streamline-type two-passage demister with optimized barb |
| CN204699522U (en) * | 2015-05-28 | 2015-10-14 | 北京香源溪环保科技有限公司 | A kind of demister blade |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693571A (en) * | 2016-11-21 | 2017-05-24 | 国佳环境科技湖北连锁有限公司 | Phenolic resin waste gas treatment device and method |
| CN110354586A (en) * | 2019-08-21 | 2019-10-22 | 华北电力大学 | A kind of streamlined demister of fluoroplastics and demisting technique |
| CN111644004A (en) * | 2020-05-26 | 2020-09-11 | 戚永团 | Fusiform multiple spot formula smoke and dust greasy dirt absorption remove device of catching |
| CN113289415A (en) * | 2021-05-21 | 2021-08-24 | 海盐得胜化工设备有限公司 | Gas-liquid separator blade assembly |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160817 |