CN208230125U - A kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit - Google Patents
A kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit Download PDFInfo
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- CN208230125U CN208230125U CN201820909330.6U CN201820909330U CN208230125U CN 208230125 U CN208230125 U CN 208230125U CN 201820909330 U CN201820909330 U CN 201820909330U CN 208230125 U CN208230125 U CN 208230125U
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- filter screen
- metal filter
- anode
- anode plate
- flue gas
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Abstract
The utility model discloses a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction units, including exhaust gases passes and electric dust collecting means, the electric dust collecting means have at least two groups, electric dust collecting means described in every group include at least two rows of anode board groups, several pieces of anode plates for being parallel to the setting of flow of flue gas direction are equipped in same row's anode board group, corona wire is equipped in same row's anode board group between adjacent anode plate, by flow of flue gas direction, the tail end of end row's anode plate is fixed with metal filter screen, and the metal filter screen is vertical with flow of flue gas direction.The utility model has the advantages that: due to use metal filter screen, remaining particulate matter be arranged on metal filter screen electric field last row metal filtration net filtration and trapping, realize 10mg/m3Minimum discharge requirement, and single unit system pressure can descend to 250Pa hereinafter, equipment resistance is low, and the design requirement and operation energy consumption of blower are also reduced.
Description
Technical field
The utility model relates to a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction units.
Background technique
Coal in China consumes 37.8 hundred million tons within 2016, accounts for about the 50% of world's consumption of coal total amount, coal fire discharged particle
Object is the one of the major reasons for causing haze weather.In September, 2014, the National Development and Reform Commission, Environmental Protection Department, country
" coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2019) " of three ministries and commissions of Bureau of Energy joint publication proposes coal-fired electricity
The granular material discharged limit value of factory is less than 10mg/m3Minimum discharge requirement, main provinces and cities also successively formulate coal-burning power plant's minimum discharge
Provincial standard.
Domestic and international traditional main flume particulate matter abatement equipment is electric precipitator, electrostatic fabric filter, bag-type dust at present
Device, conventional electric precipitator exist can not efficient stable realize the minimum discharge requirement of particulate matter, electrostatic fabric filter, sack cleaner
There are problems that resistance height, secondary pollution.Also, ultra-clean electrostatic fabric filter, the coupling electrostatic fabric filter occurred in recent years exists
Resistance is high, at high cost, and existing equipment has been difficult efficiently and stably to meet stringent emission request, therefore, needs exploitation and is suitble to now
There is electric precipitation transformation, once invest that low, operating cost is low, equipment resistance is small and can stably reach the novel of minimum discharge requirement
Cleaner.
The defect of existing electrostatic precipitator are as follows:
1) when electric precipitator rapping, particulate matter is blocking while fall into ash bucket, and part relatively fine particle object is easy by flue gas gas
Stream is taken away again, causes electric precipitator when rapping to export particle concentration apparent increase, is unable to satisfy emission request.
2) the existing old unit of part electric precipitator due to emission request at that time it is low, be unable to satisfy newest granular material discharged mark
Quasi- and policy requirements, and many unit places are limited, can not reach emission request by extending capacity reformation, so as to cause lacking
The electric precipitation renovation and improving technology of economical and efficient.
3) there are resistances greatly (generally in 700Pa or more, as runing time increases for existing bag filter and electrostatic fabric filter
Add and increase) the problem of.
Due to above, existing routine electric precipitator is relatively difficult to achieve or economical and efficient be transformed and realize 10mg/m3With
Lower stable minimum discharge requirement.
Utility model content
The purpose of this utility model is to provide a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit, energy
It is enough effectively to solve the problems, such as that existing electrostatic precipitator is difficult to realize minimum discharge standard.
In order to solve the above-mentioned technical problem, the utility model is achieved through the following technical solutions: a kind of metal filtration
Net composite anode template high efficiency electrostatic dust-extraction unit, including exhaust gases passes and electric dust collecting means, the electric dust collecting means have at least
Two groups, electric dust collecting means described in every group include at least two rows of anode board groups, are equipped with several pieces in same row's anode board group and are parallel to
The anode plate of flow of flue gas direction setting, corona wire is equipped in same row's anode board group, by flue gas stream between adjacent anode plate
The tail end in dynamic direction, end row's anode plate is fixed with metal filter screen, and the metal filter screen is vertical with flow of flue gas direction.
Preferably, the metal filter screen connected on same anode plate has at least two layers, two layers of metal filtration
For net by being arranged in parallel before and after flow of flue gas direction, the metal filtration web area remote from anode plate is greater than the metal mistake close from anode plate
Screen area.
Preferably, metal filter screen mesh front-seat along the same anode plate of flow of flue gas direction is greater than the metal of heel row
Filter screen mesh.
Preferably, the anode plate includes frame and the plate body that is fixed in frame, and the metal filter screen and frame are solid
Fixed connection.
Preferably, the metal filter screen is also connect with anode plate.
Preferably, the exhaust gases passes front end is equipped with air inlet loudspeaker, and the exhaust gases passes rear end is equipped with air horn, by cigarette
Flow of air direction, air inlet loudspeaker cross-sectional area is pre-small post-large, and air horn cross-sectional area is pre-large post-small out.
Preferably, the electric dust collecting means have two groups, and two groups of electric dust collecting means are arranged side by side as before and after flow of flue gas direction.
Preferably, the maximum length of the metal filter screen is less than the half of adjacent two pieces of anode plate spacings, metal filtration
The minimum length of net is twice of anode plate thickness, and the center of metal filter screen is fixed on anode plate.
Compared with prior art, the utility model has the advantages that: due to use metal filter screen, equipment is metal component,
Without secondary pollution, quality is small and the service life is long, since metal filter screen is vertical with flow of flue gas direction, the electric field force of electric field in front end
The lower most of particulate matter of effect, which is adsorbed on anode plate, to be captured, and it is last that remaining particulate matter is arranged on metal filter screen electric field
10mg/m is realized in the metal filtration net filtration of one row and trapping3Minimum discharge requirement, and single unit system pressure can decline
To 250Pa hereinafter, equipment resistance is low, the design requirement and operation energy consumption of blower are also reduced.
The metal filter screen connected on same anode plate has at least two layers, and two layers of metal filter screen presses flue gas
It is arranged in parallel before and after flow direction, the metal filtration web area remote from anode plate is greater than the metal filtration wire side close from anode plate
Product.Metal filter screen increases at component, sufficiently improves the utilization rate of each piece of metal filter screen.
Front-seat metal filter screen mesh is greater than the metal filter screen of heel row along the same anode plate of flow of flue gas direction
Mesh.The filterability for giving full play to each piece of metal filter screen prevents the metal filter screen of front is premature from saving bit by bit a large amount of powder
Dirt and it is ineffective.
The anode plate includes frame and the plate body that is fixed in frame, and the metal filter screen is fixedly connected with frame.
Anode plate uses the structure of frame and plate body, as long as beaing frame when rapping, without directly acting on plate body, protects
Backplate body is indeformable, and frame provides support for the fixation of metal filter screen, when rapping frame, can by the way
The online dust of metal filtration also fall by rapping, is not required to increase individual rapping apparatus and earthing or grounding means, is suitable for transformation project,
Short time limit is transformed, expense is low.
The metal filter screen is also connect with anode plate.Metal filter screen is same positively charged and synchronous with anode plate
Ground connection does not need to provide additional power supply or connection additional ground line to metal filter screen again.
The exhaust gases passes front end is equipped with air inlet loudspeaker, and the exhaust gases passes rear end is equipped with air horn, by flow of flue gas
Direction, air inlet loudspeaker cross-sectional area is pre-small post-large, and air horn cross-sectional area is pre-large post-small out.Air inlet loudspeaker spread conducive to flue gas,
Flow of flue gas speed is reduced, the dust caught in flue gas is flutterred convenient for electrostatic precipitator, and flue gas outflow can be improved in air horn out
Flow velocity, reduce the caliber of subsequent exhaust gases passes.
The electric dust collecting means have two groups, and two groups of electric dust collecting means are arranged side by side as before and after flow of flue gas direction.Further
Exhaust gas dust trapping efficiency is improved, realizes qualified discharge.
The maximum length of the metal filter screen is less than the half of adjacent two pieces of anode plate spacings, the minimum of metal filter screen
Length is twice of anode plate thickness, and the center of metal filter screen is fixed on anode plate.By electric field action, by flue gas
Obtaining dust can be close to anode plate, therefore the Dust Capacity close to two pieces of anode plate centers is seldom, metal filter screen length
It is too long to will cause waste, and the length of metal filter screen is too small is unable to fully flutter the dust grasped and do not adsorbed by anode plate, nothing
The center of method qualified discharge, metal filter screen is fixed on anode plate, is realized being symmetrical arranged for anode plate two sides, can be taken into account
The dust of anode plate two sides, which is flutterred, to be caught.
Detailed description of the invention
Fig. 1 is the section view that a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit of the utility model is overlooked
Figure；
Fig. 2 is that metal filter screen flutters the schematic diagram for catching dust in the utility model.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings.Below by
The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and should not be understood as practical new to this
The limitation of type.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" etc. refer to
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore should not be understood as limiting the present invention.
Refering to fig. 1, Fig. 2 is a kind of 5 composite anode template high efficiency electrostatic dust-extraction unit of metal filter screen of the utility model
Embodiment, the arrow in Fig. 1 are flow of flue gas direction, from corona wire 4 to the curved arrow line of anode plate 3 are electric field side in Fig. 2
It is Particle flow track to, irregular line segment, a kind of 5 composite anode template high efficiency electrostatic dust-extraction unit of metal filter screen,
Including exhaust gases passes 1 and electric dust collecting means 2, the electric dust collecting means 2 have at least two groups, and electric dust collecting means 2 described in every group include
At least two rows of anode board groups are equipped with several pieces of anode plates 3 for being parallel to the setting of flow of flue gas direction in same row's anode board group, together
Corona wire 4 is equipped in one row's anode board group between adjacent anode plate 3, by flow of flue gas direction, the tail end of end row's anode plate 3 is solid
Surely there is metal filter screen 5, the metal filter screen 5 is vertical with flow of flue gas direction.
Due to using metal filter screen 5, equipment is metal component, and without secondary pollution, quality is small and the service life is long, due to metal
Filter screen 5 is vertical with flow of flue gas direction, and most of particulate matter is adsorbed on anode plate 3 under the electric field force effect of front end electric field
It is captured, remaining particulate matter is arranged on the filtering of metal filter screen 5 and trapping of last row of 5 electric field of metal filter screen, real
Existing 10mg/m3Minimum discharge requirement, and single unit system pressure can descend to 250Pa hereinafter, equipment resistance is low, blower
Design requirement and operation energy consumption are also reduced.
Specifically, the metal filter screen 5 connected on same anode plate 3 has 1 to 3 layer, generally it is arranged two layers, two layers
The metal filter screen 5 by being arranged in parallel before and after flow of flue gas direction, metal filter screen 5 area remote from anode plate 3 be greater than from
Close 5 area of metal filter screen of anode plate 3, front-seat 5 mesh of metal filter screen along flow of flue gas direction same anode plate 3
Greater than 5 mesh of metal filter screen of heel row, the maximum length of metal filter screen 5 is less than the half of 3 spacing of adjacent two pieces of anode plates,
The minimum length of metal filter screen 5 is twice of 3 thickness of anode plate, and the center of metal filter screen 5 is fixed on anode plate 3.
For entire electrostatic precipitator, air inlet loudspeaker 6,1 rear end of exhaust gases passes are equipped in the front end of exhaust gases passes 1
Equipped with air horn 7 out, by flow of flue gas direction, 6 cross-sectional area of air inlet loudspeaker is pre-small post-large, big before 7 cross-sectional area of air horn out
Small afterwards, the electric dust collecting means 2 have two groups, and two groups of electric dust collecting means 2 are arranged side by side as before and after flow of flue gas direction, and flue gas is allowed to exist
Flow velocity can be reduced in exhaust gases passes 1, adequately flutterred and caught by anode plate 3 and metal filter screen 5.
And for the ease of transformation, investment is reduced, the anode plate 3 includes frame and the plate body being fixed in frame, described
Metal filter screen 5 is fixedly connected with frame, and metal filter screen 5 is also electrically connected with anode plate 3, is thus no longer needed to as metal filtration
Rapping apparatus is arranged in net 5, is powered and is grounded without metal filter screen 5 is individually for.
As shown in Fig. 2, effect of the ash-laden gas in deflector, uniformly flows into electric field, confession of the electric discharge corona pin in high-voltage electricity
The lower generation negative high voltage electric field of electricity and negative electrical charge, negative electrical charge are adsorbed on dust particles, and charged particle thing is in electric field force (in such as Fig. 2
Curved arrow be electric field force direction line shown in) effect under, towards 3 direction parabolic motion of anode plate.
Superfine particulate matter and particulate matter containing difficult charging characteristic ingredient become low carrying capacity particulate matter, institute due to difficult charged
By smaller (F=E × Q, Q are carrying capacity, and E is electric field strength, and F the is electric field force) dust of electric field force while flowing to anode plate 3,
Not up to anode plate 3 and by anode plate 3 adsorb when be entrained by the flow of air, at this moment, it is attached that low electrically charged particle object has arrived at anode plate 3
Closely (the irregular lines that anode plate is biased in such as Fig. 2 are Particle flow track), by being arranged near the row's anode plate 3 of end
The low electrically charged particle object of escape is trapped, greatly improves efficiency of dust collection by metal filter screen 5.
On the other hand, when anode plate 3 carries out vibration dust-cleaning, the particulate matter on anode plate 3 is attracted in rapping power
The lower major part of effect drops into ash bucket at bulk, but some particulate matter is taken up again under the action of air-flow, due to this
Partial particulate object is near anode plate 3, along air-flow electric field to be escaped near anode plate 3 after being taken up by air-flow, at this point, passing through
Metal filter screen 5 near the row's anode plate 3 of end, the particle collection that rapping is escaped, going out when rapping is greatly reduced are set
Mouth particle concentration, improves efficiency of dust collection.
The frame structure of metal filter screen 5 plays sizing and fixed function, intermediate metal mesh are welded on frame, becomes one
Body formula structure.
5 integral structure integral solder of metal filter screen or nut bolt are fixed on anode plate 3, for grassroot project,
It anode plate 3 and leads in metal filter screen 5 integral structure integral installation to 3 frame of anode plate, for transformation project, metal filtration
5 integral structure of net can directly adopt directly welding or anode plate 3 on aperture with nut bolt be fixedly installed to electric precipitator original
On the anode plate 3 of cause.
Metal filter screen 5 is whole 304 stainless steel materials or 316L stainless steel material, and conventional anodes plate 3 is not whole 304 not
Become rusty Steel material or SPCC material, has good electric conductivity and anti-corrosive properties.
Due to using the electrostatic precipitator of above structure, single unit system pressure drop is in 250Pa hereinafter, equipment resistance
Low, fan design requirement is low with operation energy consumption, and 5 equipment of metal filter screen is metal component, without secondary pollution；Dielectric impedance anode
The block media dosage of plate 3 is small, and the service life is long, and secondary pollution almost can be ignored, and metal filter screen 5 is 1 to 3 layer, flue gas
The metal mesh gap of airintake direction is big, and the metal mesh gap of outgassing direction is small, can be according to different flue gas operating conditions and emission request
The metal mesh number of plies and voidage are set, to the adaptable of processing operating condition, can realize to economical and efficient coal-burning power plant, aluminium oxide,
The industries exhanst gas outlet particle concentration such as cement, steel is lower than 10mg/m3, belong to strainer and is an integral structure, integral solder or logical
Nut bolt is crossed fixed on anode plate 3, is suitable for transformation project, short time limit is transformed, expense is low, same with conventional anodes plate 3
Vibration dust-cleaning and synchronous ground connection are walked, is not required to increase individual rapping apparatus and earthing or grounding means, is suitable for transformation project, work is transformed
Phase is short, and expense is low.
The foregoing is merely specific embodiment of the utility model, but the technical characteristics of the utility model is not limited to
This, in the field of the utility model, made changes or modifications all cover practical new at this any those skilled in the art
Among the scope of the patents of type.
Claims (8)
1. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit, including exhaust gases passes and electric dust collecting means, institute
Stating electric dust collecting means has at least two groups, and electric dust collecting means described in every group include at least two rows of anode board groups, same row's anode board group
In be equipped with several pieces of anode plates for being parallel to the setting of flow of flue gas direction, set between adjacent anode plate in same row's anode board group
There is corona wire, it is characterised in that: press flow of flue gas direction, the tail end of end row's anode plate is fixed with metal filter screen, the metal
Filter screen is vertical with flow of flue gas direction.
2. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit as described in claim 1, it is characterised in that:
The metal filter screen connected on same anode plate has at least two layers, and two layers of metal filter screen presses flow of flue gas direction
Front and back is arranged in parallel, and the metal filtration web area remote from anode plate is greater than the metal filtration web area close from anode plate.
3. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit as claimed in claim 2, it is characterised in that:
Front-seat metal filter screen mesh is greater than the metal filter screen mesh of heel row along the same anode plate of flow of flue gas direction.
4. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit as described in claim 1, it is characterised in that:
The anode plate includes frame and the plate body that is fixed in frame, and the metal filter screen is fixedly connected with frame.
5. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit as described in claim 1, it is characterised in that:
The metal filter screen is also connect with anode plate.
6. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit as described in claim 1, it is characterised in that:
The exhaust gases passes front end is equipped with air inlet loudspeaker, and the exhaust gases passes rear end is equipped with air horn, by flow of flue gas direction, air inlet
Loudspeaker cross-sectional area is pre-small post-large, and air horn cross-sectional area is pre-large post-small out.
7. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit as described in claim 1, it is characterised in that:
The electric dust collecting means have two groups, and two groups of electric dust collecting means are arranged side by side as before and after flow of flue gas direction.
8. a kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit as described in claim 1, it is characterised in that:
The maximum length of the metal filter screen is less than the half of adjacent two pieces of anode plate spacings, and the minimum length of metal filter screen is sun
Twice of electrode thickness, and the center of metal filter screen is fixed on anode plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909330.6U CN208230125U (en) | 2018-06-12 | 2018-06-12 | A kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909330.6U CN208230125U (en) | 2018-06-12 | 2018-06-12 | A kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit |
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| CN208230125U true CN208230125U (en) | 2018-12-14 |
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| CN201820909330.6U Active CN208230125U (en) | 2018-06-12 | 2018-06-12 | A kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108816515A (en) * | 2018-06-12 | 2018-11-16 | 浙江菲达环保科技股份有限公司 | A kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit |
-
2018
- 2018-06-12 CN CN201820909330.6U patent/CN208230125U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108816515A (en) * | 2018-06-12 | 2018-11-16 | 浙江菲达环保科技股份有限公司 | A kind of metal filter screen composite anode template high efficiency electrostatic dust-extraction unit |
| CN108816515B (en) * | 2018-06-12 | 2024-01-26 | 浙江菲达环保科技股份有限公司 | Metal filter screen composite anode plate type efficient electrostatic dust collector |
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