CN104971610B - Flexible high-efficiency demisting dust pelletizing system and its technique - Google Patents
Flexible high-efficiency demisting dust pelletizing system and its technique Download PDFInfo
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- CN104971610B CN104971610B CN201510363025.2A CN201510363025A CN104971610B CN 104971610 B CN104971610 B CN 104971610B CN 201510363025 A CN201510363025 A CN 201510363025A CN 104971610 B CN104971610 B CN 104971610B
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Abstract
The invention discloses a kind of flexible high-efficiency demisting dust pelletizing system and its technique, the system includes being arranged at absorption tower and the demister body in flue and the spray equipment for rinsing the demister body, the demister body includes flexible blade and fixed mount, and the flexible blade is fixedly installed on the fixed mount；The system is using demister main body system in the net flue of the additional one-level of three-level demister body in the absorption tower with flexible blade, flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric, absorbable partial fume impulsive force, blade surface has certain uniform roughness simultaneously, blade surface is set to form uniform moisture film, easily adsorb fine particulates in flue gas, the discharge of exhaust gas dust ultra-clean can be achieved, install wet electrical dust precipitator technique after more traditional desulphurization system additional and save construction cost about 80%, reduce operating cost and surpass 90%.
Description
Technical field
The present invention relates to a kind of efficient demisting dust removal field of wet desulfurization flue gas, and in particular to a kind of flexible high-efficiency demisting is removed
Dirt system and its technique.
Background technology
At present, China's Wet Limestone Desulfurization system demister uses flat or ridge type, its gas-liquid separation blade
Material uses PPTV or PVC, and separating effect is poor, to 20um in flue gas and following liquid, solid particle without separating effect, so as to lead
Dust emission is difficult to reach requirement after causing smoke-gas wet desulfurization, and part power plant can also produce a large amount of gypsum rains, cause secondary pollution.
2014, coastal and developed regions partial fuel coal power plant actively propose to reach more severe combustion engine discharge standard (SO2≤
35mg/Nm3, NO2≤50mg/Nm3, dust≤5mg/Nm3), cause thermal power plant to have to increase after flue gas desulfurization device
Humidification-type electric dust collector, it is not only higher to add power plant cost of investment, and it is added significantly to operating cost.
With dust emission standard more and more higher, domestic and international demister manufacturing company has carried out some to original demister and changed
Enter, improve demisting efficiency to a certain extent, but be extremely difficult to combustion engine discharge standard, and cost of investment is substantially increased, run
Cost is consequently increased, and also have impact on the promotion and application of these technologies to a certain extent.
Therefore, be solve problem above, it is necessary to a kind of flexible high-efficiency demisting dust pelletizing system and its technique, it is possible to increase to cigarette
Liquid, solid particle separating effect, avoid causing secondary pollution in gas, while simple in construction, and it is convenient to be reequiped for existing apparatus, can be big
Width reduces cost of investment and operating cost.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of flexible high-efficiency demisting dust pelletizing system and its technique, Neng Gouti
It is high that liquid, solid particle separating effect in flue gas are avoided causing secondary pollution while simple in construction, for existing apparatus repacking side
Just, cost of investment and operating cost can be greatly reduced.
The flexible high-efficiency demisting dust pelletizing system of the present invention, including it is arranged at absorption tower and the demister body and use in flue
In the spray equipment for rinsing the demister body, the demister body includes flexible blade and fixed mount, the flexible leaflet
Piece is fixedly installed on the fixed mount.
Further, the flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric vanes.
Further, the flexible blade is corrugated sheet, and the entrance angle of the corrugated sheet is 48-52 °, and exit angle is
38-43 °, corrugated sheet middle part is streamlined.
Further, the demister body is including being arranged above sulphur removal spraying layer demister body at least in the tower of two-stage
With the flue demister body being arranged in net flue.
Further, demister body includes first order demister, the second level vertically set gradually in the tower
Demister and third level demister, the first order demister and second level demister are abutted and shifted to install, the second level
Diffusion space is provided between demister and third level demister and is shifted to install.
Further, the spray irrigation device includes multiple nozzles and for the spray irrigation pipe for the nozzle supplies water
Road, often the both sides of demister body and flue demister body are provided with multiple nozzles in the tower of one-level.
Further, the collecting tank for collecting flexible blade sizing liquor is provided with the fixed mount, the slurries are collected
The slurry pool that groove will be simultaneously flow in absorption tower certainly in slurries.
Further, a kind of technique for carrying out demisting dust removal process to flue gas using flexible high-efficiency demisting dust pelletizing system, including
Following steps：
A, according to gas approach dust concentration, droplet concentration, flue gas flow rate, flue-gas temperature, local atmospheric pressure, environment temperature
Parameter, calculate the import and export angle for determining flexible blade；
B, the flue gas after desulfurization process is successively removed by demister body in tower and flue demister body
Mist dust removal process.
Further, in the step b, it is 4.3-4.5m/s by the flue gas flow rate of demister body in tower, passes through flue
The flue gas flow rate of demister body is 5.1-5.3m/s；The entrance angle of flexible blade be 48-52 °, exit angle be 38-
43°。
Further, periodically turn on spray equipment and rinse demister body；Flushing water pressure is 0.2-0.25MP.
The beneficial effects of the invention are as follows：A kind of flexible high-efficiency demisting dust pelletizing system and its technique disclosed by the invention, this is
System is flexible using demister main body system in the net flue of the additional one-level of three-level demister body in the absorption tower with flexible blade
Blade is shaggy wear resistant corrosion resistant soft fibre fabric, can absorb partial fume impulsive force, while blade surface has one
Fixed uniform roughness, makes blade surface form uniform moisture film, it is easier to adsorbs fine particulates in flue gas, flue gas can be achieved
Dust ultra-clean is discharged, and is installed wet electrical dust precipitator technique after more traditional desulphurization system additional and is saved construction cost about 80%, reduces fortune
Row cost surpasses 90%；It is used cooperatively with high effective desulphurization device and efficient denitrifying device, NO in discharge flue gas can be achieved2＜ 50mg/
Nm3、SO2＜ 35mg/Nm3, dust ＜ 5mg/Nm3Ultra-clean emission request.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of demister body in tower；
Fig. 3 is the structural representation of flexible blade；
Fig. 4 is the structural representation of support；
Fig. 5 is another structural representation of support.
Embodiment
Fig. 1 is the structural representation of the present invention, and Fig. 2 is the structural representation of demister body in tower, and Fig. 3 is flexible blade
Structural representation, Fig. 4 be support structural representation, Fig. 5 be support another structural representation, as illustrated, this implementation
Flexible high-efficiency demisting dust pelletizing system and its technique in example, including it is arranged at absorption tower 1 and the demister body and use in flue 2
In the spray equipment for rinsing the demister body, the demister body includes flexible blade and fixed mount, the flexible leaflet
Piece is fixedly installed on the fixed mount；The new demister and flusher for installing flexible blade additional, takes off in absorption tower 1 and flue 2
Sulphur device original equipment and function are without modification；Improvement project amount is small, transformation short time limit；And pass through the demister with flexible blade
Demisting dedusting is carried out, flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric；, can due to using flexible blade
Partial fume impulsive force is absorbed, while blade surface has certain uniform roughness, blade surface is formed uniform moisture film, more
Easily fine particulates in absorption flue gas, compared with the rigid PP plate smooth using surface, dedusting defogging effect is more preferable, realizes super
Clean emission requirement, compared with installing wet electrical dust precipitator additional after traditional desulphurization system, greatlys save construction cost, reduce operation into
This.
In the present embodiment, the flexible blade is corrugated sheet, the entrance angle (α in figure) of the flexible blade for 48-
52 °, exit angle (β) is 38-43 °, and corrugated sheet middle part is streamlined；The flexible blade include it is integrally formed enter
Mouth fragment 3, outlet fragment 4 and the arc segment 5 between the import fragment and outlet fragment, the entrance angle table
Show the angle of import fragment and demister body length direction, the exit angle represents outlet fragment and demister body length
The angle in direction, flexible blade middle part arc segment 5 is streamlined, and blade angle is former using hydraulics and aerodynamics
Reason, CFD computer simulations, input smoke entrance dust concentration, droplet concentration, flue gas flow rate, flue-gas temperature, local air
The relevant parameters such as pressure, environment temperature, comprehensive modeling, which calculates, determines best angle, and fixed mount uses PPH or PPTV materials, fixed mount
Including the support 6 fixed to flexible blade both ends and the rib 7 for being played a supportive role to flexible blade, flexible blade and rib
7 are fixedly connected, rib 7 and the import and export angle stabilization for ensureing flexible blade, and rib 7 is fixed as prior art, herein no longer
Repeat.
In the present embodiment, the demister body is including being arranged above sulphur removal spraying layer 8 demisting at least in the tower of two-stage
Device body 9 and the flue demister body 10 being arranged in net flue 2；Demister body 6 is three-level in tower in the present embodiment, and
Flue demister body 10 is set in flue going out, while meeting compact-sized, convenient installation, can be had by multistage setting
Effect improves demisting dust collection capacity, ensures high-cleanness, high discharge,.
In the present embodiment, in the tower demister body include vertically set gradually the device of first order demisting 11,
Second level demister 12 and third level demister 13, the first order demister 11 and second level demister 12, which are abutted and misplaced, to be set
Put, be provided with diffusion space 14 between the second level demister 12 and third level demister 13 and shift to install；Dislocation represents
The crest of one-level ridge type demister and another grade of ridge type demister trough face, are caused using ridge type demister body
Under the conditions of equal area and spacing with blades, blade number can be increased, and ridge type has to the upward drainage of flue gas, dislocation
Setting can have perturbation action to the flue gas of flowing, and the setting of diffusion space 14 causes flue gas disturbance evenly, avoids flue gas from expanding
Dissipate insufficient, the efficiency of the demisting dedusting of demister in raising tower.
In the present embodiment, the spray irrigation device includes multiple nozzles 15 and the spray for being supplied water for the nozzle 15
Flushing pipe, often the both sides of demister body and the demister body of flue 2 are provided with multiple nozzles 15 in the tower of one-level；Spray
Flusher uses existing spray system timing to be rinsed for the blade on demister, prevents the fouling of slurries.
In the present embodiment, the collecting tank 16 for collecting flexible blade sizing liquor, the slurry are provided with the fixed mount
The slurry pool that slurries are concentrated and flow to certainly in absorption tower 1 by liquid collecting tank 16；The fixed mount includes tubular stent, the rib
Tubular stent is fixedly installed on, the tubular stent is provided with the bar hole 17 for allowing slurries to flow into vertically, and bar hole 17 is multiple
And along the axially staggered setting of tubular stent, ensureing the structural strength of tubular stent, the slurries on flexible blade pass through bar hole 17
It is flow to certainly in slurry pool into tubular stent, avoids slurries from being impacted after falling into desulfurization layer to desulfuration efficiency.
In the present embodiment, a kind of technique for carrying out demisting dust removal process to flue gas using flexible high-efficiency demisting dust pelletizing system,
Comprise the following steps：
A, according to gas approach dust concentration, droplet concentration, flue gas flow rate, flue-gas temperature, local atmospheric pressure, environment temperature
Parameter, calculate the import and export angle for determining flexible blade；Using hydraulics and aerodynamic principle, CFD computer simulations,
Input the related ginseng such as smoke entrance dust concentration, droplet concentration, flue gas flow rate, flue-gas temperature, local atmospheric pressure, environment temperature
Number, Modeling Calculation determine, optimize the efficiency of demisting dedusting, greatly improve to 20um in flue gas and following liquid, point of solid particle
From effect.
B, the flue gas after desulfurization process is successively removed by demister body in tower and the demister body of flue 2
Mist dust removal process；Existing desulfurizing tower can be improved, change demister body and the addition demister body of flue 2 in tower,
Avoid utilizing Wet type electric dust-removing device, reduce power plant cost of investment, and operating cost is greatly reduced；And by flexible blade
The demister body of flue 2 is arranged in flue 2, can further demisting remove into, avoid increase machine volume, demisting dust removing effects
It is good.
In the present embodiment, in the step b, it is 4.3-4.5m/s by the flue gas flow rate of demister body in tower, passes through
The flue gas flow rate of the demister body of flue 2 is 5.1-5.3m/s；The entrance angle of flexible blade is 48-52 °, and exit angle is
38—43°；It is excellent by above-mentioned each parameter setting, demisting dust removing effects；The flue gas flow rate of demister body is preferably in tower
4.4m/s, the flue gas flow rate by the demister body of flue 2 are 5..2m/s, and the entrance angle of flexible blade is preferably 50 °, is gone out
Bicker degree is 40 °, and demisting is removed best into effect.
In the present embodiment, periodically turn on spray equipment and rinse demister body, flushing water pressure is 0.2-0.25MP；Rinse
Water pressure is preferably 0.23MP, rinses well and saves water cost；Rinsing interval can be according to demisting dedusting progress accommodation.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (8)
- A kind of 1. flexible high-efficiency demisting dust pelletizing system, it is characterised in that：Including being arranged at absorption tower and the demister sheet in flue Body and the spray equipment for rinsing the demister body, the demister body includes flexible blade and fixed mount, described Flexible blade is fixedly installed on the fixed mount；The flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric leaf Piece；The flexible blade is corrugated sheet, and the entrance angle of the corrugated sheet is 48-52 °, and exit angle is 38-43 °, waveform Piece middle part is streamlined.
- 2. flexible high-efficiency demisting dust pelletizing system according to claim 1, it is characterised in that：The demister body includes setting Demister body and the flue demister body being arranged in net flue at least in the tower of two-stage are placed in above sulphur removal spraying layer.
- 3. flexible high-efficiency demisting dust pelletizing system according to claim 2, it is characterised in that：Demister body bag in the tower Include the first order demister vertically set gradually, second level demister and third level demister, the first order demisting Device and second level demister are abutted and shifted to install, and it is empty that diffusion is provided between the second level demister and third level demister Between and shift to install.
- 4. flexible high-efficiency demisting dust pelletizing system according to claim 1, it is characterised in that：The spray irrigation device includes Multiple nozzles and for the spray irrigation pipeline for the nozzle supplies water, demister body and flue demister in the tower per one-level The both sides of body are provided with multiple nozzles.
- 5. flexible high-efficiency demisting dust pelletizing system according to claim 1, it is characterised in that：Use is provided with the fixed mount In the slurry pool that the collecting tank for collecting flexible blade sizing liquor, the slurry collecting groove will be simultaneously flow in absorption tower certainly in slurries.
- 6. a kind of flexible high-efficiency demisting dust pelletizing system using as described in claim any one of 1-5 carries out demisting dedusting to flue gas The technique of processing, it is characterised in that：Comprise the following steps：A, joined according to gas approach dust concentration, droplet concentration, flue gas flow rate, flue-gas temperature, local atmospheric pressure, environment temperature Number, calculate the import and export angle for determining flexible blade；B, the flue gas after desulfurization process successively is carried out into demisting by demister body in tower and flue demister body to remove Dirt processing.
- 7. the technique that demisting dust removal process is carried out to flue gas as claimed in claim 6, it is characterised in that：In the step b, lead to The flue gas flow rate for crossing demister body in tower is 4.3-4.5m/s, and the flue gas flow rate by flue demister body is 5.1- 5.3m/s；The entrance angle of flexible blade is 48-52 °, and exit angle is 38-43 °.
- 8. the technique that demisting dust removal process is carried out to flue gas as claimed in claim 7, it is characterised in that：Periodically turn on spray dress Put and rinse demister body, flushing water pressure is 0.2-0.25MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510363025.2A CN104971610B (en) | 2015-06-26 | 2015-06-26 | Flexible high-efficiency demisting dust pelletizing system and its technique |
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| CN201510363025.2A CN104971610B (en) | 2015-06-26 | 2015-06-26 | Flexible high-efficiency demisting dust pelletizing system and its technique |
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| CN104971610A CN104971610A (en) | 2015-10-14 |
| CN104971610B true CN104971610B (en) | 2017-12-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105536391A (en) * | 2015-12-31 | 2016-05-04 | 河北唯沃环境工程科技有限公司 | High-pressure self-rotation centrifugal air washer |
| CN113209769A (en) * | 2021-05-31 | 2021-08-06 | 攀钢集团研究院有限公司 | Deep dedusting and demisting process for desulfurized flue gas in low-temperature flue gas ultralow emission treatment system |
| CN113413735A (en) * | 2021-07-30 | 2021-09-21 | 西安西热锅炉环保工程有限公司 | Demister washing water recycling system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101121091B (en) * | 2006-08-10 | 2011-08-31 | 嘉园环保股份有限公司 | Composite type filter |
| CN102961943B (en) * | 2012-11-27 | 2015-03-11 | 上海龙净环保科技工程有限公司 | Method and device for synergistically removing fine particles via wet-process flue gas desulfurization |
| CN103933813A (en) * | 2014-04-01 | 2014-07-23 | 国电环境保护研究院 | Combined dust removing and defogging device for smoke |
| CN204746086U (en) * | 2015-06-26 | 2015-11-11 | 中电投远达环保工程有限公司 | High -efficient flexible defogging dust collector |
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Address after: 401122 Chongqing City, the new North District, Yu Jin Road, No. 96 Applicant after: National electric investment group Yuanda Environmental Protection Engineering Co Ltd Address before: 401122 Chongqing City, the new North District, Yu Jin Road, No. 96 Applicant before: CPI Yuanda Environmental-Protection Engineering Co., Ltd. |
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Effective date of registration: 20200417 Address after: 401122, 96 Jin Yu Road, new North District, Chongqing, Yubei District Co-patentee after: INNER MONGOLIA HMHJ ALUMINUM ELECTRICITY Co.,Ltd. Patentee after: National electric investment group Yuanda Environmental Protection Engineering Co.,Ltd. Address before: 401122 96 Jin Yu Road, North New District, Chongqing Patentee before: National electric investment group Yuanda Environmental Protection Engineering Co.,Ltd. |