CN104971610A - Flexible and efficient fog/dust removing system and technology thereof - Google Patents
Flexible and efficient fog/dust removing system and technology thereof Download PDFInfo
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- CN104971610A CN104971610A CN201510363025.2A CN201510363025A CN104971610A CN 104971610 A CN104971610 A CN 104971610A CN 201510363025 A CN201510363025 A CN 201510363025A CN 104971610 A CN104971610 A CN 104971610A
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Abstract
The invention discloses a flexible and efficient fog/dust removing system and a technology thereof. The system comprises demister bodies, which are arranged in an absorbing tower and a flue, and a spraying device for washing the demister bodies; each demister body comprises a flexible blade and a fixing rack, and the flexible blade is fixed on the fixing rack. The system adopts a three-level demister body in an absorbing tower and a one-level demister body in a flue, wherein the demister bodies are both provided with a flexible blade; the flexible blade surface are rough and are covered by wear-resistant corrosion-resistant soft fiber fabrics, thus the flexible blade can absorb part of flue gas impact, at the same time, due to the uniform roughness of the blade surface, a uniform water membrane can be formed on the blade surface, the fine particles can be more easily be absorbed by the flexible blade therefore, the provided system and technology can achieve ultraclean discharge, compared with the conventional method that a wet-process deduster is added on a desulfurization system, the construction cost is reduced by 80%, and the operation cost is reduced by 90% or more.
Description
Technical field
The present invention relates to the efficient demist dust removal field of a kind of wet desulfurization flue gas, be specifically related to a kind of flexible high-efficiency demist dust pelletizing system and technique thereof.
Background technology
At present, China's Wet Limestone Desulfurization system demister all adopts flat or ridge type, its gas-liquid separation blade material adopts PPTV or PVC, separating effect is poor, to 20um in flue gas and following liquid, consolidate particle without separating effect, thus dust emission is difficult to reach requirement after causing smoke-gas wet desulfurization, part power plant also can produce a large amount of gypsum rain, causes secondary pollution.2014, coastal and developed regions partial fuel coal power plant initiatively proposes to reach more severe combustion engine discharge standard (SO2≤35mg/Nm3, NO2≤50mg/Nm3, dust≤5mg/Nm3), thermal power plant is caused to have to increase Wet type electric dust-removing device after flue gas desulfur device, not only highlyer add power plant cost of investment, and significantly add operating cost.
Along with dust emission standard is more and more higher, domestic and international demister manufacturing company has carried out some to original demister and has improved, improve demisting efficiency to a certain extent, but be difficult to reach combustion engine discharge standard, and cost of investment significantly rises, operating cost also increases, and also have impact on the promotion and application of these technology to a certain extent thereupon.
Therefore, for overcoming the above problems, need a kind of flexible high-efficiency demist dust pelletizing system and technique thereof, can improve liquid, solid particle separation effect in flue gas, avoid causing secondary pollution, structure is simple simultaneously, convenient for existing apparatus repacking, can significantly reduce cost of investment and operating cost.
Summary of the invention
The technical problem to be solved in the present invention is for providing a kind of flexible high-efficiency demist dust pelletizing system and technique thereof, can improve liquid, solid particle separation effect in flue gas, avoid causing secondary pollution, structure is simple simultaneously, convenient for existing apparatus repacking, can significantly reduce cost of investment and operating cost.
Flexible high-efficiency demist dust pelletizing system of the present invention, comprise and be arranged at the demister body in absorption tower and flue and the spray equipment for rinsing described demister body, described demister body comprises flexible blade and fixed mount, and described flexible blade is fixedly installed on described fixed mount.
Further, described flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric vanes.
Further, described flexible blade is corrugated sheet, and the entrance angle of described corrugated sheet is 48-52 °, and exit angle is 38-43 °, and corrugated sheet middle part is streamlined.
Further, described demister body comprise be arranged at least two-stage above sulphur removal spraying layer tower in demister body and be arranged at flue demister body in clean flue.
Further, in described tower, demister body comprises the first order demister, second level demister and the third level demister that vertically set gradually, described first order demister and second level demister near and shift to install, be provided with diffusion space between described second level demister and third level demister and shift to install.
Further, described spray irrigation device comprises multiple nozzle and for the spray irrigation pipeline for described nozzle supplies water, in the tower of every one-level, the both sides of demister body and flue demister body are provided with multiple nozzle.
Further, described fixed mount is provided with the feeder for collecting flexible blade sizing liquor, the slurry pool that described slurry collecting groove will also flow in slurries in absorption tower certainly.
Further, a kind of technique utilizing flexible high-efficiency demist dust pelletizing system flue gas to be carried out to demist dust removal process, comprises 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 and determine the import and export angle of flexible blade;
B, the flue gas after desulfurization process is successively carried out demist dust removal process by demister body in tower and flue demister body.
Further, in described step b, being 4.3-4.5m/s by the flue gas flow rate of demister body in tower, is 5.1-5.3m/s by the flue gas flow rate of flue demister body; The entrance angle of flexible blade is 48-52 °, and exit angle is 38-43 °.
Further, regularly open spray equipment and rinse demister body; Flushing water pressure is 0.2-0.25MP.
The invention has the beneficial effects as follows: a kind of flexible high-efficiency demist dust pelletizing system disclosed by the invention and technique thereof, this system adopt there is flexible blade absorption tower in demister main body system in three grades of clean flues of the additional one-level of demister body, flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric, Absorbable rod partial fume impulsive force, blade surface has certain uniform roughness simultaneously, blade surface is made to form uniform moisture film, more easily adsorb fine particulates in flue gas, the discharge of exhaust gas dust ultra-clean can be realized, install wet electrical dust precipitator technique after more traditional desulphurization system additional and save construction cost about 80%, reduce operating cost and surpass 90%, with high effective desulphurization device and efficient denitrifying device with the use of, NO in discharge flue gas can be realized
2< 50mg/Nm
3, SO
2< 35mg/Nm
3, dust < 5mg/Nm
3ultra-clean emission request.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is 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.
Detailed description of the invention
Fig. 1 is 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, as shown in the figure, flexible high-efficiency demist dust pelletizing system in the present embodiment and technique thereof, comprise and be arranged at absorption tower 1 and the demister body in flue 2 and the spray equipment for rinsing described demister body, described demister body comprises flexible blade and fixed mount, and described flexible blade is fixedly installed on described fixed mount; In absorption tower 1 with flue 2, newly install demister and the flusher of flexible blade additional, desulfurizer original equipment and function are not made and are changed; Improvement project amount is little, the transformation duration is short; And carrying out demist dedusting by the demister with flexible blade, flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric; Owing to adopting flexible blade, Absorbable rod partial fume impulsive force, blade surface has certain uniform roughness simultaneously, makes blade surface form uniform moisture film, more easily adsorbs fine particulates in flue gas, compared with the ganoid rigidity PP plate of employing, dedusting demist better effects if, realizes ultra-clean emission request, and installs additional compared with wet electrical dust precipitator after traditional desulphurization system, greatly save construction cost, reduce operating cost.
In the present embodiment, described flexible blade is corrugated sheet, and the entrance angle (in figure α) of described flexible blade is 48-52 °, and exit angle (β) is 38-43 °, and corrugated sheet middle part is streamlined, described flexible blade comprises integrated import fragment 3, outlet fragment 4 and described import fragment and outlet fragment between arc segment 5, described entrance angle represents the angle in import fragment and demister body length direction, described exit angle represents the angle in outlet fragment and demister body length direction, flexible blade middle part arc segment 5 is in streamlined, blade angle adopts hydraulics and aerodynamic principle, CFD computer simulation, input smoke entrance dust concentration, droplet concentration, flue gas flow rate, flue-gas temperature, local atmospheric pressure, the relevant parameters such as environment temperature, comprehensive modeling calculates determines best angle, fixed mount adopts PPH or PPTV material, fixed mount comprises to the fixing support 6 in flexible blade two ends with for the passive rib 7 of flexible blade, flexible blade is fixedly connected with rib 7, rib 7 enters with guarantee flexible blade, exit angle is stablized, and rib 7 is fixed as prior art, do not repeat them here.
In the present embodiment, described demister body comprise be arranged at least two-stage above sulphur removal spraying layer 8 tower in demister body 9 and the flue demister body 10 that is arranged in clean flue 2; In the present embodiment, in tower, demister body 6 is three grades, and in smoke outlet flue, arrange flue demister body 10, while meeting compact conformation, convenient installation, can effectively improve demist dust collection capacity by multistage setting, ensure high-cleanness, high discharge.
In the present embodiment, in described tower, demister body comprises first order demist 11 device, second level demister 12 and the third level demister 13 that vertically set gradually, described first order demister 11 and second level demister 12 near and shift to install, be provided with diffusion space 14 between described second level demister 12 and third level demister 13 and shift to install; Dislocation represents that the crest of one-level ridge type demister is just right with another grade of ridge type demister trough, ridge type demister body is adopted to make under equal area and spacing with blades condition, blade number can be increased, and ridge type has flue gas upwards drainage, shift to install and can have perturbation action to the flue gas of flowing, and diffusion space 14 be arranged so that flue gas disturbance evenly, avoid flue gas to spread insufficient, improve the efficiency of the demist dedusting of demister in tower.
In the present embodiment, described spray irrigation device comprises multiple nozzle 15 and the spray irrigation pipeline for supplying water for described nozzle 15, and in the tower of every one-level, the both sides of demister body and flue 2 demister body are provided with multiple nozzle 15; Spray irrigation device adopts existing spray system regularly for the blade on demister rinses, and prevents the fouling of slurries.
In the present embodiment, described fixed mount is provided with the feeder 16 for collecting flexible blade sizing liquor, slurries are concentrated and are certainly flow to the slurry pool in absorption tower 1 by described slurry collecting groove 16; Described fixed mount comprises tubular stent, described rib is fixedly installed on tubular stent, described tubular stent has the bar hole 17 allowing slurries flow into vertically, bar hole 17 is multiple and is axially crisscross arranged along tubular stent, ensure the structural strength of tubular stent, slurries on flexible blade enter tubular stent by bar hole 17 and certainly flow in slurry pool, enter desulfurization layer and impact desulfuration efficiency after avoiding slurries to fall.
In the present embodiment, a kind of technique utilizing flexible high-efficiency demist dust pelletizing system flue gas to be carried out to demist dust removal process, comprises 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 and determine the import and export angle of flexible blade; Adopt hydraulics and aerodynamic principle, CFD computer simulation, the relevant parameters such as input smoke entrance dust concentration, droplet concentration, flue gas flow rate, flue-gas temperature, local atmospheric pressure, environment temperature, Modeling Calculation is determined, optimize the efficiency of demist dedusting, greatly improve the separating effect to 20um in flue gas and following liquid, admittedly particle.
B, the flue gas after desulfurization process is successively carried out demist dust removal process by demister body in tower and flue 2 demister body; Can improve existing desulfurizing tower, change demister body and interpolation flue 2 demister body in tower, avoid utilizing Wet type electric dust-removing device, reduce power plant cost of investment, and significantly decrease operating cost; And the flue 2 demister body of flexible blade is arranged in flue 2, demist can remove into further, avoid increasing machine volume, demist good dedusting effect.
In the present embodiment, in described step b, being 4.3-4.5m/s by the flue gas flow rate of demister body in tower, is 5.1-5.3m/s by the flue gas flow rate of flue 2 demister body; The entrance angle of flexible blade is 48-52 °, and exit angle is 38-43 °; By above-mentioned each optimum configurations, demist dust removing effects is excellent; In tower, the flue gas flow rate of demister body is preferably 4.4m/s, and be 5..2m/s by the flue gas flow rate of flue 2 demister body, the entrance angle of flexible blade is preferably 50 °, and exit angle is 40 °, and it is best that demist removes into effect.
In the present embodiment, regularly open spray equipment and rinse demister body, flushing water pressure is 0.2-0.25MP; Flushing water pressure is preferably 0.23MP, rinses well and saves water cost; Rinsing interval can according to demist dedusting progress accommodation.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. a flexible high-efficiency demist dust pelletizing system, it is characterized in that: comprise and be arranged at the demister body in absorption tower and flue and the spray equipment for rinsing described demister body, described demister body comprises flexible blade and fixed mount, and described flexible blade is fixedly installed on described fixed mount.
2. flexible high-efficiency demist dust pelletizing system according to claim 1, is characterized in that: described flexible blade is shaggy wear resistant corrosion resistant soft fibre fabric vanes.
3. flexible high-efficiency demist dust pelletizing system according to claim 2, it is characterized in that: described flexible blade is corrugated sheet, the entrance angle of described corrugated sheet is 48-52 °, and exit angle is 38-43 °, and corrugated sheet middle part is streamlined.
4. flexible high-efficiency demist dust pelletizing system according to claim 1, is characterized in that: described demister body comprise be arranged at least two-stage above sulphur removal spraying layer tower in demister body and be arranged at flue demister body in clean flue.
5. flexible high-efficiency demist dust pelletizing system according to claim 4, it is characterized in that: in described tower, demister body comprises the first order demister, second level demister and the third level demister that vertically set gradually, described first order demister and second level demister near and shift to install, be provided with diffusion space between described second level demister and third level demister and shift to install.
6. flexible high-efficiency demist dust pelletizing system according to claim 1, it is characterized in that: described spray irrigation device comprises multiple nozzle and for the spray irrigation pipeline for described nozzle supplies water, in the tower of every one-level, the both sides of demister body and flue demister body are provided with multiple nozzle.
7. flexible high-efficiency demist dust pelletizing system according to claim 3, is characterized in that: described fixed mount is provided with the feeder for collecting flexible blade sizing liquor, the slurry pool that described slurry collecting groove will also flow in slurries in absorption tower certainly.
8. utilize the flexible high-efficiency demist dust pelletizing system as described in any one of claim 1-7 flue gas to be carried out to a technique for demist dust removal process, it is characterized in that: 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 and determine the import and export angle of flexible blade;
B, the flue gas after desulfurization process is successively carried out demist dust removal process by demister body in tower and flue demister body.
9. technique of flue gas being carried out to demist dust removal process as claimed in claim 8, it is characterized in that: in described step b, being 4.3-4.5m/s by the flue gas flow rate of demister body in tower, is 5.1-5.3m/s by the flue gas flow rate of flue demister body; The entrance angle of flexible blade is 48-52 °, and exit angle is 38-43 °.
10. technique of flue gas being carried out to demist dust removal process as claimed in claim 9, is characterized in that: regularly open spray equipment and rinse demister body, flushing water pressure is 0.2-0.25MP.
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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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| CN104971610B CN104971610B (en) | 2017-12-05 |
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Cited By (3)
| 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 |
| WO2023005577A1 (en) * | 2021-07-30 | 2023-02-02 | 西安西热锅炉环保工程有限公司 | Flushing water recirculation system and method for mist eliminator |
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| CN102961943A (en) * | 2012-11-27 | 2013-03-13 | 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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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121091A (en) * | 2006-08-10 | 2008-02-13 | 李泽清 | Composite type filter |
| CN102961943A (en) * | 2012-11-27 | 2013-03-13 | 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 |
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Cited By (3)
| 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 |
| WO2023005577A1 (en) * | 2021-07-30 | 2023-02-02 | 西安西热锅炉环保工程有限公司 | Flushing water recirculation system and method for mist eliminator |
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| CN104971610B (en) | 2017-12-05 |
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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. |
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