CN104740935A - Streamline-type two-passage demister with optimized barb - Google Patents
Streamline-type two-passage demister with optimized barb Download PDFInfo
- Publication number
- CN104740935A CN104740935A CN201510133151.9A CN201510133151A CN104740935A CN 104740935 A CN104740935 A CN 104740935A CN 201510133151 A CN201510133151 A CN 201510133151A CN 104740935 A CN104740935 A CN 104740935A
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- China
- Prior art keywords
- demister
- barb
- blade
- passage
- fluid passage
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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 discloses a streamline-type two-passage demister with an optimized barb, belonging to a demisting device of a wet flue gas desulfurization system. The demister is composed of a plurality of demister blade components; each demister blade component is further composed of two adjacent demister blades which are fixedly connected by virtue of a fixture; a flow passage is formed by every two demister blades; a demister barb is arranged at the inlet of the demister; the demister barb is composed of a linear section and an arc section; and the arc section and the linear section are tangent at 1/4 arc. The demister disclosed by the invention is simple in structure, easy to implement, convenient in on-site installation, and capable of minimizing pressure drop while guaranteeing the demisting efficiency.
Description
Technical field
The invention belongs to the demister scope of wet method fume desulfurizing system, particularly barb demister optimized by the streamlined two passage bands of one.
Background technology
In wet desulfurizing process, the flue gas through absorption tower process has carried a large amount of slurry drops secretly, and flue gas flow rate is higher, and the drop amount that it carries is more.If do not remove these drops, it not only can form gypsum dirt and the corrosion of acceleration equipment because being deposited on absorption tower upstream device surface, also can affect the heat exchange efficiency of flue gas heater.If adopt flue gas wet emission method, then can cause and pollute power plant's surrounding environment because of chimney " rainfall " (discharge liquid, solid or slurry).Demister is coal-fired or key equipment in smoke of oil-fuel boiler desulphurization system, and can its performance directly has influence on wet method fume desulfurizing system (WFGD) reliability service continuously.The operation principle of WFGD is: when the gas containing mist flows through demister with certain speed, due to effect of inertia, and mist and demister blade collide and be attached on demister blade surface; Near demister blade surface, the diffusion of mist and gravitational settling make mist form larger drop and move up to demister blade turning with air-flow, owing to turning to centrifugal force and making drop increasing with the friction of demister blade and the surface tension of suction-operated and liquid, until the drop gathered arrive greatly buoyancy that the gravity that himself produces exceedes flue gas and surface tension of liquid with joint efforts time, drop is just separated from demister blade surface to get off.The structure that is folded to of demister blade adds the chance that mist is captured more, and the mist be not removed is captured through identical effect at next turning, such repeated action, thus drop entrained in removing flue gas.
Two important indicators weighing demister performance are that demister imports and exports pressure drop and demisting efficiency.Demister is imported and exported pressure drop and is shown that more greatly the power that system needs supplement is larger, and energy consumption is higher, and the pressure drop of general two-stage demister should control within 120-200Pa.Demisting efficiency lower flue gas water content is higher, and the amount of droplet deposition on upstream device surface, absorption tower then can be larger, and the hidden danger brought to equipment safety operation also can be larger.Therefore, dry state lower smoke outlet end water content should control at 75mg/Nm
3within.
Traditional streamlined two passage buckle blade critical flow velocities are higher, easy cleaning, be widely used at present, but mostly there is the problem that demisting efficiency is low or pressure drop is larger in large desulfurization equipment.
Summary of the invention
The object of this invention is to provide a kind of streamlined two passage bands and optimize barb demister, it is characterized in that, barb demister is made up of multiple demister blade assembly, demister blade assembly is made up of the adjacent demister blade be fixedly connected with by jig between two again, every two demister blades form fluid passage, the barb of demister is placed in fluid passage, and the streamline in the fluid passage of blade formation complied with by barb, thus controls the pressure drop that system produces.
Describedly be placed in demister barb in fluid passage and demister import vertical height is 69.5mm place, the angle of barb and vertical direction is 36 °; Demister barb is made up of straightway and arc, its straight line segment length 6.5mm, and arc is that radius is 6.5mm and 1/4 circular arc tangent with straightway.
Described barb is placed in the fluid passage that demister blade is formed, and fluid passage is narrowed, and adds the probability that drop and demister blade collide, thus increases the probability that drop is captured, and serves the effect of raising demisting efficiency.
The invention has the beneficial effects as follows that structure is simple, be easy to realize, in-site installation is convenient, while guarantee demisting efficiency pressure drop minimum; In order to overcome the problem that current wet desulfurization demister demisting efficiency is low, pressure drop is high, reaching the normal operation both ensureing wet method fume desulfurizing system, saving again the dual purpose of the energy.
Accompanying drawing explanation
Fig. 1 is FLAT MEV25/40 type defogger system overall schematic in wet desulfuration tower.
Fig. 2 is demister vane group schematic diagram after barb optimization.
In Fig. 1,1. demister blade assembly; 2. demister blade support structure; 3. demister brace summer; 4. flushing line; 5. flushing line support system; In Fig. 2,6. demister blade; 7. demister barb.
Detailed description of the invention
The invention provides a kind of streamlined two passage bands and optimize barb demister, below in conjunction with accompanying drawing, the present invention is described further.
In FIG, defogger system is made up of demister blade assembly 1, demister blade support structure 2, demister brace summer 3, flushing line 4 and flushing line support system 5, its basic structure is consistent with FLAT MEV25/40 type demister, demister blade assembly 1 is spliced between two by jig by multiple demister blade 6, and every two demister blades form fluid passage.Described demister blade 6 is made up of streamline vane and demister barb 7, and it is 69.5mm place that demister barb is placed in demister import vertical height, and the angle of barb and vertical direction is 36 °.Demister barb 7 is made up of straightway and arc, its straight line segment length 6.5mm, and arc is that radius is 6.5mm and 1/4 circular arc (as shown in Figure 2) tangent with straightway.
Can be verified by numerical experiments, the demister blade after improving and optimizating has drop and well traps effect.When the air-flow with drop is through demister fluid passage, because the streamline in blade fluid passage complied with by barb, thus control the pressure drop that system produces.Barb is placed in the fluid passage that demister blade is formed, and fluid passage is narrowed, and adds the probability that drop and demister blade collide, thus increases the probability that drop is captured, and serves the effect of raising demisting efficiency.
Claims (3)
1. barb demister optimized by streamlined two passage bands, it is characterized in that, barb demister is made up of multiple demister blade assembly, demister blade assembly is made up of the adjacent demister blade be fixedly connected with by jig between two again, every two demister blades form fluid passage, the barb of demister is placed in fluid passage, and the streamline in the fluid passage of blade formation complied with by barb, thus controls the pressure drop that system produces.
2. barb demisters optimized by a kind of streamlined two passage bands according to claim 1, it is characterized in that, described in be placed in demister barb in fluid passage and demister import vertical height is 69.5mm place, the angle of barb and vertical direction is 36 °; Demister barb is made up of straightway and arc, its straight line segment length 6.5mm, and arc is that radius is 6.5mm and 1/4 circular arc tangent with straightway.
3. barb demister optimized by a kind of streamlined two passage bands according to claim 1, it is characterized in that, described barb is placed in demister blade and forms fluid passage, fluid passage is narrowed, add the probability that drop and demister blade collide, thus increase the probability that drop is captured, serve the effect improving demisting efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133151.9A CN104740935A (en) | 2015-03-25 | 2015-03-25 | Streamline-type two-passage demister with optimized barb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133151.9A CN104740935A (en) | 2015-03-25 | 2015-03-25 | Streamline-type two-passage demister with optimized barb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104740935A true CN104740935A (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510133151.9A Pending CN104740935A (en) | 2015-03-25 | 2015-03-25 | Streamline-type two-passage demister with optimized barb |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854427A (en) * | 2016-05-30 | 2016-08-17 | 华北电力大学 | Demister blade and demister |
| CN110354586A (en) * | 2019-08-21 | 2019-10-22 | 华北电力大学 | A kind of streamlined demister of fluoroplastics and demisting technique |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995033546A1 (en) * | 1994-06-06 | 1995-12-14 | Koch Engineering Company, Inc. | Chevron-type mist eliminator and system |
| CN2608115Y (en) * | 2003-04-18 | 2004-03-31 | 北京市劳动保护科学研究所 | Wave form folding plate type dewatering and demistering apparatus |
| CN201862325U (en) * | 2010-11-10 | 2011-06-15 | 天津市恒脉机电科技有限公司 | Vertical baffling blind type demister |
| CN202237684U (en) * | 2011-09-23 | 2012-05-30 | 武汉工程大学 | Novel streamline two-channel demister with barb |
| CN204563780U (en) * | 2015-03-25 | 2015-08-19 | 三河发电有限责任公司 | Barb demister optimized by a kind of streamlined two passage bands |
-
2015
- 2015-03-25 CN CN201510133151.9A patent/CN104740935A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995033546A1 (en) * | 1994-06-06 | 1995-12-14 | Koch Engineering Company, Inc. | Chevron-type mist eliminator and system |
| CN2608115Y (en) * | 2003-04-18 | 2004-03-31 | 北京市劳动保护科学研究所 | Wave form folding plate type dewatering and demistering apparatus |
| CN201862325U (en) * | 2010-11-10 | 2011-06-15 | 天津市恒脉机电科技有限公司 | Vertical baffling blind type demister |
| CN202237684U (en) * | 2011-09-23 | 2012-05-30 | 武汉工程大学 | Novel streamline two-channel demister with barb |
| CN204563780U (en) * | 2015-03-25 | 2015-08-19 | 三河发电有限责任公司 | Barb demister optimized by a kind of streamlined two passage bands |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854427A (en) * | 2016-05-30 | 2016-08-17 | 华北电力大学 | Demister blade and demister |
| CN110354586A (en) * | 2019-08-21 | 2019-10-22 | 华北电力大学 | A kind of streamlined demister of fluoroplastics and demisting technique |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150701 |
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| RJ01 | Rejection of invention patent application after publication |