CN203380000U - Dust-collecting pole plate of wet type water film electrostatic precipitator - Google Patents
Dust-collecting pole plate of wet type water film electrostatic precipitator Download PDFInfo
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- CN203380000U CN203380000U CN201320377874.XU CN201320377874U CN203380000U CN 203380000 U CN203380000 U CN 203380000U CN 201320377874 U CN201320377874 U CN 201320377874U CN 203380000 U CN203380000 U CN 203380000U
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- electrostatic precipitator
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Abstract
The utility model discloses a dust-collecting pole plate of a wet type water film electrostatic precipitator, aiming at solving the problem that a complete and uniform covering water film is hard to form on the surface of an existing pole plate. The dust-collecting pole plate of the wet type water film electrostatic precipitator comprises an inner material layer used for absorbing moisture and enabling moisture to flow from top to bottom, wherein outer material layers capable of enabling the moisture to be permeated are composited on two sides of the inner material layer, the porosity of each outer material layer is less than that of the part, at the corresponding height, of the inner material layer, so that the moisture can gently leak to the outer surface from the inner surface of the outer material layer and the complete water film is formed on the outer surface of the outer material layer. The dust-collecting pole plate of the wet type water film electrostatic precipitator has a simple structure, low water consumption and high dust removal rate, an existing dust-collecting pole plate is replaced and a water inlet pipeline is connected under a condition that the design of a conventional electrostatic precipitator is not majorly transformed, a mechanical vibrating deashing device is not required to be arranged specially, the design upgrading and the transformation of the existing electrostatic precipitator are convenient, and therefore, the dust-collecting pole plate has the advantage of large-scale application.
Description
Technical field
The utility model relates to wet type moisture film electrostatic precipitator, refers to particularly a kind of dust collecting pole plate of wet type moisture film electrostatic precipitator.
Background technology
At present, in China's atmosphere, the content of exhaust gas dust is high, the PM of fine particulates
2.5the high several times of concentration ratio developed country, caused very large threat to health and socio-economic development, and the emission control of fine particulates has been extremely urgent.Under stricter fine particulates discharge standard, adopt any single technology that removes all can't satisfy the demands, therefore develop different control modes cooperation-removal technology day by day urgent.
The electrostatic precipitator that the electrostatic field of usining is removal mechanism, as current fume dust remover commonly used, has obtained very general application at electric power enterprise and cement industry.Utilizing electrostatic field to remove particle is mainly that electrostatic force is applied directly on particle in industrial application, makes charging particle, and moves on different in nature electrode, thereby realize removing.In practical operation, mainly with high voltage direct current, at two interpolars, produce corona discharges, dust-contained airflow is by between two electrodes during electric field, and particle is forced to charged, charged particle under the effect of electrostatic force to opposite polarity pole plate motion and trapped by pole plate.
Although electrostatic precipitator has good removal effect for the large-size particles thing, for the small particles of pollution thing, particularly for particle diameter, to be less than or equal to the removal efficiency of fine particulates of 2.5 microns not high.In order to remove better fine particulates, those skilled in the art often arrange multistage electric field in electrostatic precipitator, by the classification Trapping ways, improve as much as possible the removal efficiency to fine particulates.Yet in practical engineering application, find that this mode is also not obvious to the raising of efficiency of dust collection, a major reason that causes this phenomenon is exactly that the interior fine particulates of this particle size range is easy to flow of flue gas, a little less than horizontal proliferation, and reentrainment of dust may occur.
Aspect the Improvement of electrostatic precipitator, the horizontal effect that how to strengthen electrostatic field remains the important development direction that improves the fine particulates arresting efficiency.Wherein, the wet cottrell that adopts pole plate to apply the moisture film technology has good dust removing effects, thereby is widely applied in industrial production.But also there is following defect in this wet cottrell: because moisture film can be subject to the impact of polar board surface tension force, while perhaps running into barrier, water (flow) direction changes, can not form complete uniform moisture film at polar board surface like this, cause these regional dust to be difficult to remove clean.For addressing the above problem, main employing at present sprays the measure of large water gaging at polar board surface, but this can cause again the deficiency that the water consumption significantly increases, water treatment is more difficult.
In sum, how providing a kind of and can effectively guarantee that the pole plate liquid film covers complete wet cottrell, to realize efficient, few water, remove the target of fine particulates, is current those skilled in the art difficult problems urgently to be resolved hurrily.
Summary of the invention
The purpose of this utility model is exactly the dust collecting pole plate that a kind of wet type moisture film electrostatic precipitator will be provided, and it can form complete moisture film at polar board surface, and water consumption is low, efficiency of dust collection is high.
For achieving the above object, the dust collecting pole plate of the wet type moisture film electrostatic precipitator that the utility model is designed, comprise the inner layers of material that absorbs moisture content and allow it to flow through from top to bottom, its special character is: the both sides of described inner layers of material are compounded with the outer layer material that can allow moisture content to infiltrate, the porosity of described outer layer material is less than the porosity of corresponding At The Height inner layers of material, thereby guarantee moisture content by the inner surface of outer layer material to the mild seepage of outer surface, and then form complete moisture film on this outer surface.
The mechanism of action of the utility model dust collecting pole plate is such: because the porosity of inner layers of material is larger, the porosity of outer layer material, be conducive to water and flow from the top down in inner layers of material, can arrive smoothly the pole plate bottom.And water can infiltrate into equably gently polar board surface by outer layer material gradually in the process of flowing downward, at polar board surface, form moisture film.By such mode, can under the prerequisite that forms less water film thickness, realize the integrality of polar board surface moisture film.
As preferred version, 0.3 ~ 0.9 times of the porosity that the porosity of described outer layer material 2 is corresponding At The Height inner layers of material 1.Like this, form suitable porosity between the two differential, inner layers of material principal security water flows downward, and outer layer material principal security water permeates to polar board surface.
Further, the porosity of described inner layers of material is preferably 0.2 ~ 0.8.The setting of this porosity, can either guarantee that water is from the outside surface seep of the inner surface of outer layer material, can guarantee again to form complete stable moisture film at outer surface.
Further, the porosity distribution of described outer layer material and inner layers of material is for being uniformly distributed from top to bottom, reducing gradually from top to bottom to distribute or a kind of in reducing to distribute of segmentation from top to bottom.Wherein, two kinds of back distributed architecture more adapts to water mobile state from the top down, thereby makes formed water film thickness more uniform and stable.
Again further, the one-sided thickness of described outer layer material is 0.5 ~ 2mm, and the thickness of described inner layers of material is 1 ~ 10mm, and the one-sided thickness of outer layer material is 1 with the ratio of the thickness of inner layers of material: (2 ~ 5).In general, the thickness of inner layers of material is greater than the thickness of outer layer material.Like this, can guarantee that most of water flows downward in inner layers of material, also can guarantee that small part water permeates to outside material surface simultaneously.
Again further, described outer layer material and inner layers of material are concrete dynamic modulus flaggy or knit layer.Like this, can guarantee that both form stable porosity differential, to guarantee that water is from the outside surface seep of the inner surface of outer layer material.
Again further, described outer layer material is the hydrophilic material layer.The moisture film strong adhesion, the covering integrality that on hydrophilic material layer surface, form are good, and can make water film thickness further reduce, and the uniformity of pole plate moisture film is guaranteed simultaneously.
Further, described outer layer material and inner layers of material are all flame retardancy or flame-retardant materials layer.Like this, can effectively avoid under extreme case, due to uneven some the position generating electrodes punch-through caused of study of water film distribution, guarantee that the dust collecting pole plate of wet type moisture film electrostatic precipitator is safe and reliable to operation.
Further, described outer layer material and inner layers of material are a kind of or its combination in metal, metal alloy, pottery, macromolecular compound, carbon fiber, glass fibre, resin fibre and linen-cotton material.The modes such as outer layer material and inner layers of material can be bonding by routine, welding, pressure forming are combined as a whole.Its wide material sources, with low cost, processing is convenient, is easy to promote.
The utility model compared with prior art, have the following advantages and outstanding effect: due to the dust collecting pole plate that has adopted the composite structure based on penetration theory, water can flow out and form the stable and uniform moisture film at the pole plate outer surface from pole plate is inner, thereby adsorb and remove fine particulates, and without the external nozzles that is provided for specially cleaning the polar board surface particle, compare with conventional wet cottrell, can significantly reduce the system water consumption.Simultaneously, the dust collecting pole plate of composite structure surface moisture film covers complete, can guarantee higher dust-collecting efficiency.Like this, to the routine intravenous Design of Electrostatic Precipitator, do not carrying out under the prerequisite of larger change, by changing existing dust collecting pole plate and connecting inlet channel, can implement, without special configuration mechanical rapping cleaning dust device, can conveniently for the design upgrading of existing electrostatic dust collection equipment, with transformation, regenerate, there is the advantage of the application of maximizing.
The accompanying drawing explanation
The sectional structure schematic diagram of the dust collecting pole plate that Fig. 1 is the first wet cottrell.
The sectional structure schematic diagram of the dust collecting pole plate that Fig. 2 is the second wet cottrell.
The sectional structure schematic diagram of the dust collecting pole plate that Fig. 3 is the third wet cottrell.
Shown in figure, arrow means water (flow) direction.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The dust collecting pole plate of the first wet type moisture film electrostatic precipitator, mainly consist of inner layers of material 1 and the outer layer material 2 that is fitted in its both sides as shown in Figure 1.The concrete dynamic modulus flaggy that inner layers of material 1 is made for glass fiber material, its thickness is 5 ~ 7mm.The knit layer that outer layer material 2 is made for hydrophily linen-cotton material, its one-sided thickness is 1.5 ~ 2mm.In the present embodiment, the porosity distribution of outer layer material 2 and inner layers of material 1 all adopts equally distributed structure from top to bottom.Particularly, inner layers of material 1 is 0.7 in the porosity of each At The Height, and outer layer material 2 is 0.7 * 0.6=0.42 in the porosity of each At The Height.During making, by inner layers of material 1 and outer layer material 2 by the periphery bonding, push as a whole getting final product.
In existing electrostatic precipitator, adopt the dust collecting pole plate of embodiment 1 to replace original dry dust collection pole plate, cancel original rapping apparatus, and at the dust collecting pole plate top, nozzle or flow structure are set, can complete transformation.
The dust collecting pole plate of above-mentioned wet type moisture film electrostatic precipitator is when work, the flow level of carrying fine particulates flows through dust collecting pole plate, nozzle or flow structure be 1 water supply from the dust collecting pole plate top to inner layers of material, water flows downward under Action of Gravity Field, and pass through outer layer material 2 seepage flow to the pole plate surface, form the uniform water film flowed downward at polar board surface, the dust moved to pole plate under the trapping electrostatic field, and flow in the collector of electrostatic precipitator bottom, realize removing of fine particulates.Detection shows, the dust collecting pole plate of embodiment 1 can reach more than 40% at the removal efficiency that particle diameter is less than to 2.5 microns fine particulates along the depth of flow direction of 1 meter in electric field.
The dust collecting pole plate of the second wet type moisture film electrostatic precipitator, comprise inner layers of material 1 and the outer layer material 2 that is fitted in its both sides as shown in Figure 2.The knit layer that inner layers of material 1 is made for glass fibre, its thickness is 2 ~ 4mm.The knit layer that outer layer material 2 is made for the hydrophily carbon fibre material, its one-sided thickness is 0.8 ~ 1.0mm.In the present embodiment, the porosity distribution of outer layer material 2 and inner layers of material 1 all adopts and reduces gradually the structure distributed from top to bottom.Particularly, the top-down porosity of inner layers of material 1 is decremented to 0.4 gradually by 0.8, and the top-down porosity of outer layer material 2 is decremented to 0.4 * 0.5=0.20 gradually by 0.8 * 0.5=0.40.During making, inner layers of material 1 and outer layer material 2 are passed through periphery bonding, extruding or assembled as a whole getting final product.
In existing electrostatic precipitator, adopt the dust collecting pole plate of embodiment 2 to replace original dry dust collection pole plate, cancel original rapping apparatus, and at the dust collecting pole plate top, nozzle or flow structure are set, can complete transformation.
The dust collecting pole plate of above-mentioned wet type moisture film electrostatic precipitator is when work, the flow level of carrying fine particulates flows through dust collecting pole plate, nozzle or flow structure be 1 water supply from the dust collecting pole plate top to inner layers of material, water flows downward under Action of Gravity Field, and pass through outer layer material 2 seepage flow to the pole plate surface, form the uniform water film flowed downward at polar board surface, the dust moved to pole plate under the trapping electrostatic field, and flow in the collector of electrostatic precipitator bottom, realize removing of fine particulates.Detection shows, the dust collecting pole plate of embodiment 2 is less than 2.5 microns fine particulates removal efficiency to particle diameter can reach more than 45% along the depth of flow direction of 1 meter in electric field.
Embodiment 3
The dust collecting pole plate of the third wet type moisture film electrostatic precipitator, also comprise inner layers of material 1 and the outer layer material 2 that is fitted in its both sides as shown in Figure 3.The concrete dynamic modulus flaggy that inner layers of material 1 is made for the anti-flammability ceramic material, its thickness is 4 ~ 9mm.The knit layer that outer layer material 2 is made for resin fibre, its one-sided thickness is 1.8 ~ 2mm.In the present embodiment, the porosity distribution of outer layer material 2 and inner layers of material 1 all adopts segmentation from top to bottom to reduce the structure distributed.Particularly, inner layers of material 1 is combined by inner layers of material epimere 1a, inner layers of material stage casing 1b, inner layers of material hypomere 1c, wherein: the porosity of inner layers of material epimere 1a is 0.7, and the porosity of inner layers of material stage casing 1b is 0.5, and the porosity of inner layers of material hypomere 1c is 0.3.Accordingly, outer layer material 2 is combined by outer layer material epimere 2a, outer layer material stage casing 2b, outer layer material hypomere 2c, wherein: the porosity of outer layer material epimere 2a is 0.7 * 0.4=0.28, the porosity of outer layer material stage casing 2b is 0.5 * 0.4=0.2, and the porosity of outer layer material hypomere 2c is 0.3 * 0.4=0.12.During making, inner layers of material 1 and outer layer material 2 are got final product by periphery, boning or be welded as a whole.
In existing electrostatic precipitator, adopt the dust collecting pole plate of embodiment 3 to replace original dry dust collection pole plate, cancel original rapping apparatus, and at the dust collecting pole plate top, nozzle or flow structure are set, can complete transformation.
The dust collecting pole plate of above-mentioned wet type moisture film electrostatic precipitator is when work, the flow level of carrying fine particulates flows through dust collecting pole plate, nozzle or flow structure be 1 water supply from the dust collecting pole plate top to inner layers of material, water flows downward under Action of Gravity Field, and pass through outer layer material 2 seepage flow to the pole plate surface, form the uniform water film flowed downward at polar board surface, the dust moved to pole plate under the trapping electrostatic field, and flow in the collector of electrostatic precipitator bottom, realize removing of fine particulates.Detection shows, the dust collecting pole plate of embodiment 3 is less than 2.5 microns fine particulates removal efficiency to particle diameter can reach more than 40% along the depth of flow direction of 1 meter in electric field.
Finally should be noted that, the above specific embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to preferred embodiment, the utility model is had been described in detail, but those of ordinary skills are to be understood that, inner layers of material of the present utility model and outer layer material are carried out simple modification or be equal to replacement, for example, at metal, metal alloy, offer the water seepage hole of even or non-uniform Distribution on the materials such as macromolecular compound, or the material that adopts the utility model not enumerate realizes that internal layer water flows downward, outer water is to the effect of surface infiltration, these all can not break away from the spirit and scope of technical solutions of the utility model, and all should be encompassed among the protection domain of the utility model claim.
Claims (10)
1. the dust collecting pole plate of a wet type moisture film electrostatic precipitator, comprise the inner layers of material (1) that absorbs moisture content and allow it to flow through from top to bottom, it is characterized in that: the both sides of described inner layers of material (1) are compounded with the outer layer material (2) that can allow moisture content to infiltrate, the porosity of described outer layer material (2) is less than the porosity of corresponding At The Height inner layers of material (1), thereby guarantee moisture content by the inner surface of outer layer material (2) to the mild seepage of outer surface, and then form complete moisture film on this outer surface.
2. the dust collecting pole plate of wet type moisture film electrostatic precipitator according to claim 1, is characterized in that: 0.3 ~ 0.9 times of the porosity that the porosity of described outer layer material (2) is corresponding At The Height inner layers of material (1).
3. according to the dust collecting pole plate of the described wet type moisture film of claim 1 or 2 electrostatic precipitator, it is characterized in that: the porosity of described inner layers of material (2) is 0.2 ~ 0.8.
4. according to the dust collecting pole plate of the described wet type moisture film of claim 1 or 2 electrostatic precipitator, it is characterized in that: the porosity distribution of described outer layer material (2) and inner layers of material (1) is for being uniformly distributed from top to bottom, reducing gradually from top to bottom to distribute or a kind of in reducing to distribute of segmentation from top to bottom.
5. the dust collecting pole plate of wet type moisture film electrostatic precipitator according to claim 3 is characterized in that: the porosity distribution of described outer layer material (2) and inner layers of material (1) is for being uniformly distributed from top to bottom, reducing gradually from top to bottom to distribute or a kind of in reducing to distribute of segmentation from top to bottom.
6. according to the dust collecting pole plate of the described wet type moisture film of claim 1 or 2 electrostatic precipitator, it is characterized in that: the one-sided thickness of described outer layer material (2) is 0.5 ~ 2mm, the thickness of described inner layers of material (1) is 1 ~ 10mm, and the ratio of the thickness of the one-sided thickness of outer layer material (2) and inner layers of material (1) is 1: (2 ~ 5).
7. according to the dust collecting pole plate of the described wet type moisture film of claim 1 or 2 electrostatic precipitator, it is characterized in that: described outer layer material (2) and inner layers of material (1) are concrete dynamic modulus flaggy or knit layer.
8. according to the dust collecting pole plate of the described wet type moisture film of claim 1 or 2 electrostatic precipitator, it is characterized in that: described outer layer material (2) is the hydrophilic material layer.
9. according to the dust collecting pole plate of the described wet type moisture film of claim 1 or 2 electrostatic precipitator, it is characterized in that: described outer layer material (2) and inner layers of material (1) are all flame retardancy or flame-retardant materials layer.
10. according to the dust collecting pole plate of the described wet type moisture film of claim 1 or 2 electrostatic precipitator, it is characterized in that: described outer layer material (2) and inner layers of material (1) are a kind of or its combination in metal, metal alloy, pottery, macromolecular compound, carbon fiber, glass fibre, resin fibre and linen-cotton material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320377874.XU CN203380000U (en) | 2013-06-28 | 2013-06-28 | Dust-collecting pole plate of wet type water film electrostatic precipitator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320377874.XU CN203380000U (en) | 2013-06-28 | 2013-06-28 | Dust-collecting pole plate of wet type water film electrostatic precipitator |
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| CN203380000U true CN203380000U (en) | 2014-01-08 |
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| CN201320377874.XU Withdrawn - After Issue CN203380000U (en) | 2013-06-28 | 2013-06-28 | Dust-collecting pole plate of wet type water film electrostatic precipitator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341409A (en) * | 2013-06-28 | 2013-10-09 | 中节环立为（武汉）能源技术有限公司 | Dust-collecting pole plate of wet water-film electrostatic precipitator |
-
2013
- 2013-06-28 CN CN201320377874.XU patent/CN203380000U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341409A (en) * | 2013-06-28 | 2013-10-09 | 中节环立为（武汉）能源技术有限公司 | Dust-collecting pole plate of wet water-film electrostatic precipitator |
| CN103341409B (en) * | 2013-06-28 | 2016-08-10 | 中节环立为（武汉）能源技术有限公司 | The dust collecting pole plate of wet type moisture film electrostatic precipitator |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140108 Effective date of abandoning: 20160810 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |