Dust charge electric-type bag filter
Technical field
The present invention relates to a kind of cleaners, more particularly to a kind of dust charge electric-type bag filter.
Background technique
Currently, the deduster that scene uses is divided into bag filter and electric precipitator.Bag filter is by filter bag pair
Dusty gas is filtered and dust collection and filter bag regenerative process, and the discharge process of net gas, realization bag filter pair
The purification of dusty gas and the separation of dust and collection.
Electric precipitator is the foundation using DC electric field, realize to the dust charged of dusty gas and using identical charges repel each other and
The Charged feature that there is a natural attraction between the sexes by adsorbing powder dust at the two poles of the earth, and passes through the deashing and dust receipts to dust collector pole and corona discharge electrode
Collection process reaches the separation to dust and gas and the purification of dusty gas.
Currently, the electric charge field design of domestic pre electrified sack cleaner is in air inlet, Charged will also be
It turns back in channel by air-flow and separates and gather dust process with the dust and gas that after air flow method process, just can enter filter bag, and air-flow exists
Turn back in distributed process, due to the ground connection of body of deduster, thus in the contact process of air-flow and passage wall surface and powder
Under collision effect between dirt, most of charged dust power loss can be made and become neutral, and this part adsorbing powder dust exists
After filter bag surface forms filter cake, there is no the effect that identical charges repel each other between dust particles, thus the voidage of its dust filtering cake can't
How much is increase.
And domestic electrostatic fabric filter substantially belongs to two-stage dedusting, prime is electric precipitation, and rear class is bag-type dust, and two-stage is removed
Dirt can make the dust of rear class dedusting thinner, since the deduster equally exists Charged air-flow turning back and be distributed in the channel
Process, thus partial state of charge dust has the generation of power loss problem, this will make to be easier to be embedded in the filter layer of filter bag of dust collector
Thinner dust can further result in filter bag regeneration effect difference and the relatively low problem of life-span of the filter bag.
Summary of the invention
For many deficiencies of the prior art, the present invention provide it is a kind of utilize established high-voltage dc to dust into
Row is charged, then carries out dust and gas separation using the effect of system fluid negative pressure and by filter bag, Charged is made to be adsorbed on filter bag
On surface, then regeneration and the deashing process of filter bag are realized in timing (or level pressure) by way of offline or online blowback, to make
Dust charge electric-type bag filter can be realized the purification process to dusty gas.
Realize that above-mentioned purpose uses following technical scheme:
A kind of dust charge electric-type bag filter, the single chamber of the deduster are rectangular three-dimensional chamfered edge pyramidal structure, deduster
Ontology includes air-purifying chamber, dust and gas room, ash bucket, and air-purifying chamber is located at the top of dirt room, filter is fixed between air-purifying chamber and dust and gas room
Bag is realized the connection of air-flow by filter bag, is equipped in air-purifying chamber and regenerates reverse gas cleaning for filter bag between air-purifying chamber and dust and gas room
Air jet pipe, filter bag purified gas guides to gas outlet by off-line ash-clearing valve;Have in dust and gas room filtering gas cloth bag and
Bag cage assembly, dust and gas room lower sides are equipped with dust fall plate washer, and dust fall plate washer is located at insulation board pulse dust cleaning pipe top, insulation board arteries and veins
It rushes deashing pipe to connect with insulation board heating apparatus, is mainly used for the soot blowing of insulation board and the heating function of anti-condensation, insulation board is fixed
In body interior in inlet, outlet side;Inlet, outlet is located at the side of dust and gas room, and it is one that the other side of dust and gas room, which is equipped with it,
The corona incubator of body;The indoor lower end of dust and gas is corona zone, and the corona zone is made of anode network and cathode corona bracket, fixed
In the fixing end that the corona discharge electrode side connection on insulation board is cathode corona bracket;The lower section of corona zone is ash bucket, and corona zone utilizes height
It presses DC electric field to carry out dust charged, then carries out dust and gas point using the effect of fluid negative-pressure and by the filtering function of filter bag
From making net gas be adsorbed on filter bag outer surface by Charged.
Preferably, insulation board is connected and fixed with corona discharge electrode side.
Preferably, the insulation board heating apparatus of anti-condensation and the insulation board pulse dust cleaning pipe for soot blowing are fixed in ontology
The top of side insulation board, to prevent climbing for insulation board electric and short-circuit.
It is hung preferably, corona incubator is provided with porcelain vase pulse dust cleaning pipe, corona discharge electrode heater, support porcelain vase and porcelain vase
Bar assembly supports porcelain vase and porcelain vase sunpender assembly to be vertically arranged, and porcelain vase sunpender assembly is fixed on support porcelain vase, and porcelain vase pulse is clear
Ash pipe and corona discharge electrode heater are fixed on incubator side wall, and porcelain vase sunpender assembly is connect with cathode corona bracket.
Preferably, anode network is fixed on body of deduster inner wall, cathode corona bracket is by solid on porcelain vase sunpender and insulation board
Fixed corona discharge electrode side connection is attached and fixes, and has insulation characterisitic between anode network and cathode corona bracket, and form high pressure
Corona zone.
Preferably, the Charged layer that cloth bag outer surface is formed, under the action of dust charged effect, the sky of dust filtering cake
Gap rate increases range in (20~90) × 100%.
By adopting the above technical scheme, compared with prior art, since the present invention utilizes high pressure (72KV) DC electric field to powder
Dirt progress is charged, then carries out dust and gas separation using the effect of system fluid negative pressure and by filter bag, is adsorbed on Charged
On the outer surface of filter bag, have the advantage that
1. first to dust charged, it is charged after the transient process lost without charged quantity of dust, directly removed using cloth bag
Dirt device principle is gathered dust;
2. the dust layer that filter bag is formed is small to the resistance of air-flow due to the effect of dust charged effect, it is easy to deashing, than normal
Advise the low about 500Pa or so of bag filter running resistance, or even more than, the charge (carrying capacity and chargeability) of this and dust has
It closes, and charge and granularity of dust, specific resistance etc. are related, therefore system overall resistance reduces, air-introduced machine runs power and reduces, section
Energy effect is obvious.
3. the dust layer due to being formed outside filter bag improves the gap of dust filtering cake under the action of dust charged effect
Rate, thus its cleaning cycle time can extend is approximately conventional bag filter (2~10) times, it is same this with dust concentration and
Charge is related, to substantially reduce the operation ratio of ash removing equipment, reduces energy consumption.
4. since system resistance reduces the reduction with filter bag reverse gas cleaning number, to make filter bag working tension reduce, instead
It blows over journey and is damaged number reduction, thus extend the service life of filter bag and blowing valve, improve the operation ratio of integral device, drop
The low operation and maintenance cost of equipment.
5. due to the dust layer good permeability of formation, voidage is high, thus after filter bag deformation its filter cake spalling it is good, because
And the pressure and blowing amount of reverse gas cleaning air-flow can be reduced, that is, reduce pressure and the blowing time of blowback compressed gas.
6. corona is direct current 72KV, according to the difference of dust air quantity, select electric current in (5~50) mA range,
Corona discharge power is small.
Detailed description of the invention
Fig. 1 is main view of the invention (section view) structural schematic diagram.
Fig. 2 is the side view of Fig. 1.
Marked in the figure: air-purifying chamber 1, cloth bag and bag cage assembly 2, dust and gas room 3, air inlet 4, gas outlet 5, corona discharge electrode incubator
6, dust fall plate washer 7, insulation board pulse dust cleaning pipe 8, insulate board heating apparatus 9, insulation board support 10, corona discharge electrode side connection 11, ash bucket
12, anode network 13, cathode corona bracket 14, porcelain vase pulse dust cleaning pipe 15, corona discharge electrode heater 16, support porcelain vase 17, porcelain vase sunpender
Assembly 18, impulse electromagnetic valve 19, compressed gas air accumulator 20, injection tube 21, off-line ash-clearing valve assembly 22.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
The following examples are intended to illustrate the invention, but cannot be used to limit the scope of the invention.Item in embodiment
Part can be adjusted according to actual conditions are further.
The structure of the bag filter dust cleaning form online or offline using biserial or single-row action of low-voltage pulse, can also use
The dust cleaning form of biserial or single-row air-box type, the present embodiment is by taking single-row action of low-voltage pulse off-line ash-clearing bag filter as an example, in detail
Illustrate the specific design scheme of its dust charge electric-type bag filter.
The structure of dust charge electric-type bag filter is shown in Fig. 1, Fig. 2.The deduster single chamber is inverted pyramids structure, inverted pyramid
It is divided into 12 three parts of air-purifying chamber 1, dust and gas room 3 and ash bucket from top to bottom in vivo, is equipped in air-purifying chamber 1 and connects with compressed gas air accumulator 20
Logical air jet pipe 21, compressed gas air accumulator 20 is located at outside the shell of deduster, between compressed gas air accumulator 20 and air jet pipe 21
Fluid channel is provided with the impulse electromagnetic valve 19 of adjusting gas flow.Between air-purifying chamber 1 and dust and gas room 3, it is separated by by card, card
Bag cage assembly is made to be located at by hole and filter bag by air-purifying chamber side using the tensioner connection type of elastic ring structure loaded on inside filter bag
It props up the filter bag outer surface of dust and gas room side.The effect of air-purifying chamber 1: first is that can realize the offline or online ash removal to filter bag, second is that
Purified gas is guided into gas outlet (case) by off-line ash-clearing valve.
Dust and gas room 3 is located at the lower section of air-purifying chamber 1, and air-purifying chamber is located at the top of three-dimensional cone, between air-purifying chamber and dust and gas room
Card is fixed filter bag with elastic ring structure.Filter bag is set to become the onty fiuidic channel between air-purifying chamber and dust and gas room, and net
The filter bag internal orifice top of gas chamber side is equipped with the injection tube of filter bag regeneration reverse gas cleaning, and air-purifying chamber is also by filter bag purified gas
Gas outlet (case) is guided to by off-line ash-clearing valve.The outer surface of cloth bag is exposed in dust and gas room 3.The card on 3 top of dust and gas room fills
There are cloth bag and bag cage assembly 2, main function is filtering grit, separates dust and gas.Cloth bag and bag cage assembly 2 are in vertical and horizontal
It arranges at matrix, arrangement quantity handles air quantity integrated configuration by single chamber.The side of dust and gas room 3 is equipped with inlet, outlet 4,5, separately
Side is equipped with the corona incubator 6 being integrated with.It is equipped with and is obliquely installed in the side plate lower part that is separated by with air inlet/outlet (case)
Dust fall plate washer 7, the lower part of dust fall plate washer 7 is equipped with insulation board pulse dust cleaning pipe 8 and insulation board heating apparatus 9 and insulation board support 10.
Lower end in dust and gas room 3 is provided with corona zone.The effect of dust and gas room 3: first is that completing dust charged process;Second is that existing as channel
Dust and gas is sent into filter bag under the guidance of system negative pressure, while the dust filtering cake of filter bag outer surface can be directly blown into ash during blowback
Bucket;Third is that corona discharge electrode except with anode network constitute corona zone realize dust charged in addition to, the metal at downward tip position and ash bucket
Bottom and side constitute a relatively weak inhibition electric field, and electric field is inhibited to fall to the dust in air-flow, including after reverse gas cleaning
The dust for falling on ash bucket, it is different according to the energy of dust kinetic energy track, inhibit electric field have to dust slow down and pre electrified and
The effect gathered dust in advance.
Corona zone is made of anode network 13 and cathode corona bracket 14, and anode network 13 and cathode corona bracket 14 constitute the two of insulation
Corona discharge electrode is connect cathode by a pole, and anode network connects anode and by grounding, and the voltage of corona is direct current 72KV, and electric current is pressed
The difference for the treatment of quantity carries out calculating selection in (5~50) mA range.
The effect of corona zone is to establish high-voltage dc and and be evenly distributed with air-flow and inhibit to fall the reentrainment of dust effect after ash.
14 one end of cathode corona bracket connect 11 fixed, the other end and the porcelain vase sunpender assemblies being located in corona incubator 6 with corona discharge electrode side
It is connected and fixed.Corona incubator 6 is provided with porcelain vase pulse dust cleaning pipe 15, corona discharge electrode heater 16, support porcelain vase 17, porcelain vase sunpender
Assembly 18.Support porcelain vase 17 is vertically arranged, and is supported and is set with porcelain vase sunpender assembly 18 on porcelain vase 17.Porcelain vase pulse dust cleaning pipe 15, electricity
Dizzy pole heater 16 is fixed on the side wall of incubator and corresponding with support 17 lower part of porcelain vase.Expose 18 upper end of porcelain vase sunpender assembly
Support porcelain vase 17 is outer and the incoming end as power supply, lower end are connect with cathode corona bracket 14.The lower section of corona zone is ash bucket 12, electricity
Dizzy area be using the high-voltage dc between anode and cathode to dust carry out it is charged, then act through filter using fluid negative-pressure
Bag carry out dust and gas separation, so that Charged is adsorbed on filter bag outer surface, by the blowback process to filter bag make filter bag regenerate and incite somebody to action
Dust releasing is in ash bucket.Corona incubator 6, which is mainly realized, insulate corona discharge electrode, and the inlet wire case as high voltage power supply, prevents porcelain
The moisture condensation of bottle and the excess accumulation of dust, in order to avoid cause to climb electricity and short-circuit generation.
Preferably, the dust layer that cloth bag and bag cage assembly 2 are formed is under the action of dust charged effect, dust filtering cake
Voidage increase, the voidage of dust filtering cake increases range in (20~90) × 100%.The cleaning cycle time extends, and is approximately conventional
3 times of bag filter cleaning cycle, usually between (2-10) times.The Charged layer that cloth bag outer surface is formed, belongs to negative
Polarity Charged, though this is because dust charged process has a small amount of positively charged dust, it is also compound in collision process
At neutrality and negative polarity Charged is diffused into, under the action of same sex Charged repels each other effect, the porosity base of filter bag
This does not change, but the voidage of its outer surface dust filtering cake is changed, according to the defined notion formula of volume ratio, cloth bag appearance
The dust layer air strike rate that face is formed:
P=(V0-V)/V0× 100%=(1-ρ0/ ρ) × 100%
Wherein: P--- voidage;V0--- particle volume;V--- nature volume;
ρ0--- bulk density;ρ --- natural volume density;
It can be seen that V is constant and V0Increase, P can be made to change, so that dust filtering cake is provided with the characteristic of filtering sponge, due to the shape
The size of dust filtering cake voidage is related with dust size component and carrying capacity etc. under state, and voidage increases range in (20~90)
×100%。
The increase of dust filtering cake voidage, reduces system resistance, but gradually increasing with dust filtering cake thickness, resistance meeting
It is gradually increased, this is because its dust filtering cake resistance and filtration velocity, fluid dynamic viscosity factor, dust filtering cake voidage, filter
Dirt cake thickness, the resistance coefficient etc. of dust filtering cake are related, therefore the dust filtering cake that Charged is formed, by fraction and carrying capacity
It is different, it is possible to increase its voidage range reduces the overall operation resistance of system in (20~90) × 100%, and it is anti-to increase filter bag regeneration
It blows the period, reduces regeneration deashing compressed air pressure and flow, extend the service life of pulse valve and off-line ash-clearing valve cylinder,
Extend life-span of the filter bag, the limiting pressure for slowing down ontology pressure-bearing and time etc..
Due to the dust layer good permeability of formation, the spalling of its filter cake is good after voidage height, thus filter bag deform, can be straight
It connects and drops into ash bucket.
Dust charge electric-type bag filter be using the high-voltage dc established to dust carry out it is charged, after charged
Dust is directly sucked in the outer surface of cloth bag under the action of fluid negative-pressure, it is charged after air-flow without exhumation process, and the lotus of dust
Electric process is carried out after airflow uniform distribution.Then dirt is carried out using the effect of fluid negative-pressure and by cloth bag and bag cage assembly 2
Gas separation, makes Charged be adsorbed on cloth bag outer surface, and realized by way of offline or online blowback the regeneration of cloth bag with
Deashing process, to realize the purification process of dusty gas.
The course of work of the invention
Dusty gas is through air inlet 4 and enters after the partition between dust and gas room is turned back ash bucket 12, larger in dust and gas
Grain falls into ash bucket 12 due to inertia;Dust and gas first passes around the electricity being made of anode network 13 and cathode corona bracket 14 in uphill process
Dizzy area can make most of grit corona negative electrical charge within (0.1~0.01) time second, and fraction grit corona is positive charge,
Since there is resistance in corona zone to fluid, thus corona zone has the characteristics that uniformly distributed air-flow;Charged air-flow after corona exists
Under the action of fluid negative-pressure, it is dispersed into the cloth bag exterior space of matrix arrangement in dust and gas room, and after sock filtration, dust is stayed
Dirt cake is formed outside filter bag, purified gas enters air-purifying chamber 1 through cloth bag and bag cage assembly 2, the purified gas in air-purifying chamber 1
Body is excluded through off-line ash-clearing valve 22 and house outlet 5 again.With the increase of dedusting process, charged grit is by cloth bag and bag cage
Assembly 2 obstruct and be adsorbed on cloth bag outer surface dirt cake it is more and more thicker, system resistance also opposite increases of walking unhurriedly is set when reaching
Resistance when should control off-line ash-clearing valve assembly 22 and block current path, and delayed firing impulse electromagnetic valve 19 stores up compressed gas
Drying compressed gas in gas tank 20 is sent into each filter bag of the case row within (0.1~0.2) S time by injection tube 21,
Make filter bag expand outward in moment and form back draught to blow off dust filtering cake in ash bucket.After the case whole filter bag regenerates blowback,
Delayed start-up off-line ash-clearing valve 22 makes the case filter bag again can be from new investment filter process.
In dust filtering cheese in the process, there is charge due to being adsorbed on the grit outside filter bag, and be identical negative polarity
Charge, therefore under the charge interaction that identical charges repel each other, the dust filtering cake that dust is formed is than the dust filtering that nonpolarity dust is formed
The voidage of cake is much larger and bulk density is much lower, improves the permeability of dust filtering cake, thus filter bag can be made to regenerate blowback
Number reduce, while reduce filter bag working tension, extend the service life of filter bag and blowing valve, improve whole set
Standby operation ratio reduces the operation and maintenance cost of equipment.
The present invention is higher than conventional bag filter (600~800 centimetres), takes up an area occasion to harshness, can keep the temperature porcelain vase and tie
Structure is changed to panel structure, thus identical with the length and width of conventional cloth bag deduster.But this form is not advocated.
Corona zone can set maintenance door, and maintenance door should install the detection switch of security alarm and the protection of high pressure power down function.
Also settable clean uses air compressor, and compressor outlet gas uses after should being dried.
Above-described embodiment only expresses one embodiment of the present invention, and but it cannot be understood as to model of the present invention
The limitation enclosed.It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the premise, also
Several modifications and improvements can be made, these are all within the scope of protection of the present invention.