CN102069035B - Hybrid dust particulate collector system - Google Patents

Hybrid dust particulate collector system Download PDF

Info

Publication number
CN102069035B
CN102069035B CN201010539247.2A CN201010539247A CN102069035B CN 102069035 B CN102069035 B CN 102069035B CN 201010539247 A CN201010539247 A CN 201010539247A CN 102069035 B CN102069035 B CN 102069035B
Authority
CN
China
Prior art keywords
bypass
electrostatic precipitator
clean
esp
bypass segment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201010539247.2A
Other languages
Chinese (zh)
Other versions
CN102069035A (en
Inventor
A·O·贝克
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz Aktiebor AG
Original Assignee
Alstom Technology AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of CN102069035A publication Critical patent/CN102069035A/en
Application granted granted Critical
Publication of CN102069035B publication Critical patent/CN102069035B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
    • B03C3/155—Filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/019—Post-treatment of gases

Abstract

The present invention relates to a hybrid dust particulate collector system. A method for removing dust particles from a raw gas stream (18), which comprises raw gas dust particles, in a hybrid dust particulate collector system (10) comprising an electrostatic precipitator (12), and a barrier filter (14) located downstream, with respect to a gas flow direction through the system (10), of said electrostatic precipitator (12), comprises cleaning at least a major portion of the raw gas stream (18) in the electrostatic precipitator (12), so as to obtain an ESP cleaned gas stream portion (22), and transferring a bypass fraction of said raw gas dust particles to a bypass fraction return region (70) located in or downstream of an outlet (20) of said electrostatic precipitator (12), and upstream of said barrier filter (14), said bypass fraction having a coarser dust particle composition compared to the composition of dust particles remaining in the ESP cleaned gas stream portion (22).

Description

Hybrid dust particulate collector system
Technical field
The present invention relates to hybrid dust particulate collector system, the barrier filter (barrier filter) that it comprises electrostatic precipitator and is positioned at the downstream of described electrostatic precipitator.The invention still further relates to for remove the method for dirt particle at this hybrid particle collector.
Background technology
In the burner of boiler and other type, usually need to from the flue gas produced, remove particulate matter combustion process, for example flying dust.U.S. Patent No. 5,024,681 disclose a kind of for remove the method for particle from gas, the method comprises the following steps: at first make gas and particle through traditional electrostatic precipitator (ESP), remove whereby the 90-99% of described particle, then will leave the residual particles of described ESP and the barrier filter that described gas is sent to the downstream that is placed in described electrostatic precipitator.
The particle removal system needs periodic maintenance, and consumed energy during operation; Therefore, exist for energy saving and the demand that reduces the maintenance requirement of this system.Also constantly making great efforts to improve the integral particle collection efficiency of hybrid particle collector system.
Summary of the invention
A target of the present invention is to solve or at least alleviate part or all of the problems referred to above.For this reason, provide a kind of for remove the method for dirt particle from original (raw) air-flow at hybrid dust particulate collector system, original air-flow comprises the original gas dirt particle, this hybrid dust particulate collector system comprises electrostatic precipitator (ESP), and the barrier filter that is positioned at the downstream of described electrostatic precipitator with respect to the primary air direction by this system, the method comprises:
At least major part of clean original air-flow in electrostatic precipitator, in order to obtain the clean air-flow part of ESP; And
The bypass segment of described original gas dirt particle is transferred to the bypass segment return area of outlet or the downstream that is arranged in described electrostatic precipitator and the upstream that is positioned at described barrier filter, described bypass segment has the composition of the dirt particle in the air-flow part clean with remaining in ESP and compares more coarse dirt particle composition.
" roughness " of dirt particle composition is by the mass mean diameter D of the dust sample with this dirt particle composition mMDlimit.The mass mean diameter D of the dust sample that comprises n particulate mMDbe calculated as:
D MMD = Σ m i d i Σ m i
Wherein, d iand m irefer to diameter and the quality of each particulate i (i=1 to n) of sample.The mass mean diameter D of dust sample mMDlarger, the dirt particle composition of this sample is just more coarse.More generally, this means total dirt particle mass M of being carried by air-flow larger (this is meaned by larger particulate), the composition of the dirt particle carried by this air-flow is just more coarse.
Also can be by not added up on independent particulate but add up to D on size interval mMDaccurately approach.
Therefore, the relatively coarse original gas dirt particle that is transferred to the bypass return area will be set up relative porous and permeable dust piece on barrier filter.The compactness formed separately with the air-flow clean by ESP, relative impermeable dust piece compares, by means of the porous dust piece of coarse bypass segment dirt particle formation, can allow to clean barrier filter every the longer time interval.The more clean wearing and tearing that reduced barrier filter frequently of barrier filter, and the maintenance shop that has therefore extended barrier filter every.More clean and also can reduce the total particulate emission to surrounding air frequently, because usually and then after clean barrier filter, observing discharge dust peak in cleaned flue gas.In addition, more the dust piece of porous can stride across barrier filter and produce lower gas pressure drop.This has reduced the amount of forced gas required energy by barrier filter.
According to an embodiment, by the not ESP of described original air-flow, clean bypass segment is carried to described bypass segment return area to described bypass segment.By by means of original gas itself, carrying bypass segment, just do not need the conveyer of appointment to carry bypass segment.
As an example, bypass segment that can be by means of bypass duct, that described not ESP is clean is transferred to described bypass segment return area from the bypass inlet zone of the upstream of electrostatic precipitator.Pipeline can easily be sized to, in order to meet the definite bypass needs of existing apparatus, make and be conducive to remodeling of the present invention.
As another alternative, can the clean bypass segment of described not ESP be transferred to described bypass segment return area via the bypass path of the inactive part by described electrostatic precipitator, make the clean bypass segment transmission of described not ESP by electrostatic precipitator, and can be not cleaned by means of electric field.Obviously, this is very cheap and compact embodiment.In addition, only at least a portion by the temporary transient electrostatic precipitator of stopping using is in order to produce described bypass path, can (for example) by turn-offing or the turn-on bus section arbitrarily open and close the bypass by electrostatic precipitator.
According to an embodiment, described bypass segment is included in the part of the dirt particle that in first of electrostatic precipitator, the air-flow clean with ESP partly separates.Typically from original air-flow, remove the most coarse particulate for first of electrostatic precipitator.By return to the part of the coarse particulate part of collecting in first, can on barrier filter, obtain further the more dust piece of porous.
Preferably, the described bypass segment of described original gas dirt particle reaches the 2-30% of the total amount of the dirt particle in original air-flow by mass, and more preferably reaches by mass 3-20%.In this scope, the benefit that the dust in ESP is removed still remains on attractive level, and the dust that simultaneously enters barrier filter has the granulometric composition that allows to form porous dust piece.
Preferably, the method comprises that the amount of the bypass segment that is transmitted to the bypass segment return area is adjusted to the selected amount of bypass segment.By regulating this amount, it is feasible making the amount of bypass segment be suitable for specific process condition.
According to an embodiment, the method comprises that the event in the equipment of downstream based on electrostatic precipitator or upstream controls the amount that is passed to the bypass segment of bypass segment return area to be passed.Therefore, feasible being in response to changes the amount that process condition is regulated bypass segment.
According to an embodiment, control the transmission of described bypass segment based on the clean startup of barrier filter, make barrier filter be assigned to prepare by bypass section.After just cleaned, the barrier filter of some types is especially responsive to filling (blinding).According to this embodiment, before barrier filter has been exposed to a large amount of fine particles in being entrained in the clean air-flow of ESP, can set up rapidly protectiveness porous dust piece.
According to a further aspect in the invention, solve or at least alleviate part or all the problems referred to above by the hybrid dust particulate collector system for remove dirt particle from original air-flow, original air-flow comprises the original gas dirt particle, this system comprises electrostatic precipitator and barrier filter, described barrier filter is connected to the downstream of described electrostatic precipitator, electrostatic precipitator is configured to so that at least major part of clean original air-flow, in order to obtain the clean air-flow part of ESP, this system comprises:
Transmitting device, it is configured in order to the bypass segment of described original gas dirt particle is transferred to the bypass segment return area of outlet or the downstream that is arranged in described electrostatic precipitator and the upstream that is positioned at described barrier filter, and transmitting device is configured in order to transmit the bypass segment that the composition with the dirt particle in the air-flow part clean with remaining in ESP is compared more coarse dirt particle composition.
Again, " roughness " of dirt particle composition is by the mass mean diameter D of the dust sample with this granulometric composition mMDlimit.
The relatively coarse original gas dust that is transferred to the bypass return area by transmitting device will be set up relative porous and permeable dust piece on barrier filter.The compactness formed separately with the air-flow clean by ESP, relative impermeable dust piece compares, the porous dust piece of by means of coarse bypass section, assigning to form can allow to clean barrier filter every the longer time interval.The more clean frequently of barrier filter reduced the wearing and tearing on the barrier filter.More clean and also can reduce the total particulate emission to surrounding air frequently, because usually and then after clean barrier filter, observe discharge dust peak in cleaned flue gas.In addition, more the dust piece of porous can stride across barrier filter and produce lower gas pressure drop.Therefore, reduced the amount of forcing the clean gas of ESP required energy by barrier filter.
According to an embodiment, described transmitting device is configured to so that the described bypass segment that bypass segment that will be clean by the not ESP of described original air-flow carries is transferred to described bypass segment return area.
According to an embodiment, described transmitting device comprises bypass duct, this bypass duct by the bypass inlet joint area of the upstream of electrostatic precipitator to described bypass segment return area.According to a specific embodiment, bypass duct can be provided with control valve, makes the transmission that can arbitrarily start or regulate bypass segment.
According to an embodiment, described transmitting device comprises by the bypass path of the inactive part of described electrostatic precipitator, makes the clean bypass segment of described not ESP to transmit by electrostatic precipitator, and can be not cleaned by means of electric field.
According to a specific embodiment, this transmitting device can further comprise controller, controller is configured to so that in operating period of hybrid dust particulate collector system, the at least described part of the temporary transient electrostatic precipitator of stopping using, make the clean air-flow part of described not ESP can transmit not cleaned by electrostatic precipitator.
According to an embodiment, described transmitting device comprises bypass duct, this bypass duct is connected to the dust collection bucket of first of electrostatic precipitator on described bypass segment return area, and described bypass duct is configured in order to will with the dust of collecting of the clean flow separation of described ESP, be transferred to described bypass return area.
Preferably, described transmitting device is suitable for transmitting the 2-30% by mass of the total amount of the dirt particle in original air-flow, and is more preferably 3-20% by mass.
According to an embodiment, described transmitting device comprises the control system of the transmission for controlling the bypass segment that leads to the bypass segment return area.According to an embodiment, control system is configured to so that the event in the equipment of the downstream based on electrostatic precipitator or upstream is controlled the amount that is passed to the bypass segment of bypass segment return area to be passed.According to a specific embodiment, control system is configured in order to start the transmission of described bypass segment based on the clean startup of barrier filter, makes barrier filter be assigned to prepare by bypass section.
According to an embodiment, described electrostatic precipitator and described barrier filter are included in same housing.This embodiment especially is very suitable for compact device.
According to specification and claims, other purpose of the present invention and feature will be apparent.
The accompanying drawing explanation
With reference to accompanying drawing, by following illustrative and the nonrestrictive detailed description of the preferred embodiments of the present invention, will understand better above-mentioned and other purpose of the present invention, feature and advantage, in the accompanying drawings, identical reference number will be for similar element, wherein
Fig. 1 is the summary side view of the first embodiment of hybrid dust particulate collector system;
Fig. 2 is the curve map that the exemplary variations of dust granulometric composition is shown;
Fig. 3 a is the summary side view of the second embodiment of hybrid dust particulate collector system;
Fig. 3 b is the summary top view of ESP of the hybrid dust particulate collector system of Fig. 3 a;
Fig. 4 illustrates for remove the flow chart of the method for dirt particle from original air-flow;
Fig. 5 illustrates for remove the flow chart of the method for dirt particle from original air-flow;
Fig. 6 is the summary side view of the 3rd embodiment of hybrid dust particulate collector system.
The specific embodiment
Fig. 1 shows the first embodiment of hybrid dust particulate collector system 10 in the mode of side and cross-section.The system 10 of Fig. 1 comprises electrostatic precipitator (ESP) 12, and ESP12 and barrier filter 14 are connected in series.In this example, the barrier filter 14 shown in Fig. 1 is fabric filters of bag house filter type, at US 4,336, it is described in more detail in 035.
ESP 12 has for ESP entrance 16 original, gas 18 that be loaded with dirt particle, and the ESP outlet 20 of clean gas 22 for ESP, from ESP, clean gas 22, has removed most of dirt particles.Original gas 18 for example can be the flue gas from boiler 24, the fuel of burning such as coal in boiler 24.The boiler 24 of the Fig. 1 controlled by boiler control system 25 is connected on ESP12 by original gas pipeline 26.
Electrostatic precipitator 12 has shell 28, in shell 28, provides first, second and the 3rd, and last.Each is provided with some sparking electrodes, has shown wherein two (twp) sparking electrodes 30 in Fig. 1; And some passive electrode plates, shown one of them passive electrode plate 32 (as known as (for example, from US Patent No 4,502,872) in prior art) in Fig. 1.In Fig. 1, for reason clearly, only show the electrode of first of ESP 12.Typically, passive electrode 32 remains on the ground potential place, and sparking electrode 30 is in the operation of the electromotive force place of several kV of plus or minus.
Provide electric current to each in the ESP field from the electrical power supply.In Fig. 1, first reception of ESP12 is from the electrode current of the first electrical power supply 34, and 36 electric current is supplied in second reception from the second electrical power, and 38 electric current is supplied in the 3rd reception from the 3rd electrical power.The output current of each electrical power supply 34,36,38 is controlled by control system 40.Control system 40 is also controlled knocking of passive electrode plate 32 in mode well known to the skilled person.
Each of ESP12 also is provided with bucket 42, struggle against 42 be arranged in this corresponding passive electrode plate 32 below, make when knock passive electrode plate 32, the dirt particle of collecting will fall into and struggle against 42 from the passive electrode plate.Remove from struggling against 42 the dust 44 of collecting, and elsewhere it is processed.
Bag filter 14 is provided with: bag filter entrance 46, and bag filter entrance 46 is connected in ESP outlet 20 by pipeline 36; And bag filter outlet 50, bag filter outlet 50 is connected on chimney 52 by clean air pipeline 48, in order to will clean flue gas, is discharged to surrounding air.Bag filter 14 further is provided with: inlet compartment 54, and inlet compartment 54 is communicated with bag filter entrance 46, in order to receive the gas 22 clean from the ESP of ESP12; And outlet compartment 56, outlet compartment 56 exports 50 by bag filter and is communicated with clean air conduit 48.Clean air pipeline 48 can comprise optional air blast 49, so that gas is pumped by bag filter 14.By wall 58 separately, wall 58 is configured in order to allow gas only by filter fabric, from inlet compartment 54, to be sent to outlet compartment 56 two compartments 54,56.In the particular instance shown in Fig. 1, filter fabric comprises several filter bag 60, for reason clearly, has only shown wherein two.Therefore, the dust remained in the air-flow that ESP filters will be collected on the outside of filter bag 60, and the final dust piece that forms on the surface of filter bag 60.At bag filter 14 after operation a period of times, this dust piece by set up thick to and compact to making it by wadding filter bag 60, and so stride across bags 60 and cause larger pressure drop.Therefore, by the clean air pulse that is conducted through filter bag 60 along contrary direction with respect to flue gas stream, carry out periodically cleaning and filtering bag 60, make the dust piece be forced to discharge from filter bag 60, and drop in bucket 61.For this reason, by forced air tank 63, provide the clean air nozzle 62 of supply to be arranged in each filter bag 60 places.The clean air pulse is controlled by barrier filter control system 64.According to prior art, typically enough carry out continually pulse of air clean, keep reasonably low so that stride across the pressure drop of filter bag 60, but avoided unnecessary cleaning.Clean the meeting consumed energy by pulse of air too continually, and filter bag is exposed to excessive mechanical wear.In addition, the dust piece also can affect the integral filter effect of (contribute to) bag filter 14 significantly; When having removed the dust piece, the cleaning efficiency of bag filter temporarily reduces a little.
The bag filling can be described as substantially wherein dust piece and hinders the gas transmission by the situation of filter bag.When fine particles in depth is penetrated in the fabric of filter bag, the bag filling of particular type can occur; The tiny dust of relatively small amount can be enough to cause the larger filling of bag.The example of hybrid particle collector system based on such of prior art: the particulate of removing in continuous filter at each is The more the better.Therefore, in the hybrid system of prior art, all original gas all transmit by ESP and clean by ESP.But ESP not only removes particulate; And it also can change granulometric composition, because larger particulate has the higher trend of being collected by ESP.Therefore, remain in the fine particles that the granulometric composition of the part in the clean air-flow of ESP has higher relative share, and be more prone to the wadding filter bag than granulometric composition original, the not clean air-flow of ESP.The higher filling effect of the air-flow that ESP is clean tends in depth to be penetrated into this fact in the fabric of filter bag owing to fine particles, and also has fine particles to trend towards forming compacter this fact of dust piece of dust piece formed than coarse particulate.On the other hand, coarse particulate can in depth not be penetrated in the fabric of filter bag, and even can stop fine particles to be penetrated in the fabric of filter bag.The bag wad act (contribution) of submicron particulate (have and be less than the approximately fine particles of the diameter of 1 μ m) is especially serious.
Coarse dirt particle, particularly have and be greater than the approximately particulate of the diameter of 30 μ m, trends towards forming the very dust piece of porous, and this dust piece not only allows high air-flow by wherein, but also can Adsorption Phase to a large amount of more tiny dirt particles.In other words, the downstream of ESP exists very coarse particulate can be particularly useful for the dust collection efficiency of barrier filter; Therefore, the variation that the ESP of the granulometric composition of air-flow causes can reduce the dust collection efficiency of barrier filter.
In order to alleviate those problems, the hybrid particle collector system of Fig. 1 comprises bypass duct 66, and bypass duct 66 is connected between original gas pipeline 26 and the clean gas pipeline 36 of ESP.Bypass duct 66 operations, the bypass segment 68 (described bypass segment 68 carry the bypass segment of dust in original air-flow 18) clean with the not ESP that allows original air-flow 18 walked around ESP12, and the air-flow 22 clean with ESP mixes in the bypass segment return area 70 in the downstream of ESP12.The bypass segment of the dust in original air-flow 18 (bypass segment 68 of original air-flow 18 carries described bypass segment by bypass duct 66) enters bypass duct 66 in the bypass inlet zone 67 that is arranged in original gas pipeline 26, and therefore aspect granularity, have with original gas pipeline 26 in the essentially identical particulate composition of original air-flow 18.
On the other hand, export the 20 clean air-flows 22 of ESP that leave ESP 12 by ESP and mainly carry relatively tiny dirt particle, because according to its basic operating principle, ESP12 removes coarse particulate, and to remove fine particles than it more efficient.Tiny dirt particle part by mixing the clean air-flow 22 of ESP and the relative more coarse bypass segment that the bypass segment 68 by original air-flow 18 carries, the dust that enters bag filter 14 will form the more dust piece of porous of dust piece that the tiny dust of the air-flow 22 more clean than ESP will form separately on filter bag 60.In other words, the filling of filter bag 60 will reduce due to the more coarse dust composition that enters bag filter 14.
Bypass duct 66 can be provided with optional control valve 72, to control the amount of the original gas that will be bypassed, and the amount of dust of therefore also controlling position, the impact that be not subject to ESP12 fully in the downstream that will be bypassed to ESP12.As an example, control valve 72 can be the air door of any type in type well known by persons skilled in the art.Bypass duct also can be provided with optional air blast 73, with the stream of the bypass segment 68 by original air-flow 18, remains on place at a high speed.For the original gas dust composition of some types, use air blast can be of value to the most coarse dirt particle that guarantees bypass segment and do not drop on the bottom surface of bypass duct 66, but remain in the by-pass of bypass segment return area 70.Also can replace valve 72 or use air blast 73 with valve 72 combinations, to control by the bypass flow rate of bypass duct 66.Preferably, the approximately 70-98% of the original air-flow 18 in original gas pipeline 26, and about 80-97% more preferably, transmission is cleaned by ESP12 and by ESP12, and the remaining about 2-30% of the original air-flow 18 in original gas pipeline 26, or 3-20% more preferably, switch to the bypass segment return area 70 in the downstream of ESP12 by bypass duct 66.
The result of the actual measurement of Fig. 2 based on from the coal-burning installation place shows numerical example.Numerical example has been supposed the dust removal efficiency of 97% (the pressing the dust mass M) of ESP12 shown in figure 2, and the bypass segment 68 of original air-flow 18 reaches 7% of original air-flow 18.The bypass segment 68 of supposing original air-flow 18 is carried at the bypass segment that the granularity aspect has the composition identical with original air-flow 18.The curve map of Fig. 2 shows the dust mass M changed with mean particle dia d; More accurately, the logarithm log (d) with respect to diameter has drawn per time unit by the dust quality dM of every logarithm interval between diameters d (log (d)) of the appropriate section of hybrid particle collector 10.Corresponding curve shows the gross mass of the original gas dirt particle 19 carried by the original air-flow 18 from boiler; The quality of the bypass segment 17 carried by the bypass segment 68 of original air-flow 18; Remain in the quality of the tiny dust part 21 in the clean air-flow of ESP 22; And the gross mass of mixing dirt particle part 23, enter the tiny dust part 21 of bag filter 14 in downstream of bypass segment return area 70 and the summation of bypass segment 17.3% tiny dust part 21 air-flow 22 clean by ESP by mass that comprises the original gas dust that enters ESP12 carries and leaves ESP12.In bypass return area 70, tiny dust part 21 is mixed with 7% the bypass segment 17 corresponding to original gas dust 19, in order to form mixing portion 23.As appreciable in Fig. 2, in the tiny dust part 21 of carrying at the air-flow clean by ESP 22, the particle mass over 10% belongs to the large fraction of submicron with the diameter (log (d)<0) that is less than 1 μ m.On the other hand, in the mixing portion 23 in the downstream of bypass return area 70, particle mass belong to the large fraction with the diameter that is less than 1 μ m less than 5%.Have the not only relative amount of the very coarse dirt particle of the large fraction of the diameter d of 30 μ m (log (d)<1.5) for belonging to, the difference between thin 21 and mixing portion 23 is even more surprising; Most of mixing portion 23 is comprised of very coarse dirt particle, and thin 21 comprises considerably less this coarse dirt particle.In other words, the dust carried by flue gas stream will be original air-flow with respect to filter bag filling basic expressions in the downstream of bypass segment return area 70, and comprise simultaneously the dust quality of originally being carried by original air-flow 18 less than 10%.
Again referring to Fig. 1, make the other effect of bypass segment 68 bypasses of original air-flow 18 be, in bypass segment return area 70, the thin of the charged tiny dirt particle of the bypass segment carried by the bypass segment 68 of original gas in will the gas part 22 clean with remaining in ESP mixes.When the mixing of these two parts occurs, after passing through ESP12, the tiny dirt particle of static electrification lotus will be coalescent agglomerating with relative coarse particulate uncharged, bypass, in order to form even more coarse agglomerating particulate.Agglomerating particulate is kept together by electrostatic force, model moral supernatural power and other colloidal force, in order to stop the fine particles be attached on this agglomerating particulate in depth to be penetrated in the fabric of filter bag.This effect even further contributes to strengthen the porous of the dust piece on filter bag 60.For mixing of the bypass segment 68 that improves ESP clean air-flow 22 and original gas, pipeline 36 is provided with optional static mixer 71 in the positive downstream of bypass return area 70.Although many dissimilar static mixers are well-known for those skilled in the art, the static mixer 71 that also may be located in the Fig. 1 in bypass return area 70 is shown in one group of two blender blade of pipeline 36 inside.
Fig. 3 a is the summary side view of the second embodiment of hybrid dust particulate collector system 10.The system 10 of Fig. 3 a comprises electrostatic precipitator (ESP) 12, and ESP12 is to be connected in series with reference to the similar mode of the described mode of Fig. 1 and bag filter 14 with top.ESP12 has for ESP entrance 16 and ESP outlet 20 original, gas 18 that be loaded with dirt particle.
Be similar to the ESP12 of Fig. 1, the electrostatic precipitator 12 of Fig. 3 a is divided into continuous field, can control independently these operation.In Fig. 3 a, ESP12 is divided into two fields: first and second, last.Each is provided with some sparking electrodes 30 and several passive electrode plates 32, and this will further illustrate with reference to Fig. 3 b below.In Fig. 3 a, for reason clearly, schematically show only only a passive electrode 32 and two sparking electrodes 30 in first of ESP12.
As Fig. 3 b (Fig. 3 b is the schematic plan of the electrostatic precipitator 12 of Fig. 3 a) the best illustrates, in this example, each is divided into three parallel, unit (being called bus segment) independently.Bus segment is defined as the independent unit of ESP12, and it has the electric power source of itself, with the electrode to this bus segment (one or more), supplies induced current.In the example of Fig. 3 a-b, first has three parallel bus segment 74a-c, and second also has three parallel bus segment 76a-c.
Each bus segment 74a-c, 76a-c are provided with sparking electrode 30 and passive electrode plate 32.Each in bus segment 74a-c, 76a-c also is provided with independently current source 34a-c, 36a-c, and each current source applies electric current and voltage between the corresponding sparking electrode 30 of this concrete bus segment 74a-c, 76a-c and passive electrode plate 32.By control system 40, (Fig. 3 a) controls each in current source 34a-c, 36a-c individually.
All electrodes 30,32 are arranged in housing 28, and housing 28 comprises inlet horn 27 and outlet loudspeaker mouth 29.
Above being similar to, with reference to the described system of Fig. 1, the deduster 12 of Fig. 3 a-b is configured in order to receive the original air-flow 18 from original gas pipeline 26.ESP12 is divided into bus segment 74a-c, 76a-c parallel, that be subject to control separately, makes selected path 74b, the 76b that may make by ESP12 inoperative.This can (for example) is zero to realize by the electric current of the electrode of subgroup 74b, the 76b that will stride across bus segment 74a-c, 76a-c and voltage-regulation.Therefore, carry from the bypass segment 68 original, the not clean air-flow 18 of ESP of the bypass segment of the dust of original air-flow 18 can along the inactive path 74b of ESP12,76 by and by ESP12, do not cleaned.By the bypass segment 68 of original air-flow 18 along the inactive path 74b of ESP12, bypass dust part that 76b carries aspect granularity, have with original gas pipeline 26 in the essentially identical particulate composition of original air-flow 18.
Bypass segment 68 air-flow 22 clean with ESP in the bypass segment return area 70 in the downstream of the electrode 30,32 of ESP12 mixes; In this example, bypass segment return area 70 is arranged in the outlet 20 of ESP12.The outlet 20 of ESP12 is defined as the position in the positive downstream of the electrode 30,32 of last of ESP.In the example shown in Fig. 3 b, this means that outlet 20 is positioned at the upstream of the outlet loudspeaker mouth 29 of ESP12.
Tiny dirt particle part by mixing the clean air-flow 22 of ESP and the relative more coarse bypass segment of the bypass segment 68 of original air-flow, the dust that enters bag filter 14 will form the more dust piece of porous of dust piece that the tiny dust of the air-flow 22 more clean than ESP will form separately on filter bag 60.In other words, the inactive path 74b of the ESP12 by Fig. 3 a-b, 76b has and the essentially identical function of the bypass duct of Fig. 1 66.
Treat that inactive bus segment is by control system 40 or selected by the operator, the original gas that makes selected amount 68 is by ESP12 and not cleaned.Preferably, the approximately 70-98% of the original gas in original gas pipeline 26,80-97% even more preferably, by ESP12, cleaned, and the remaining about 2-30% of the original gas in original gas pipeline 26, perhaps 3-20% more preferably, switch to bypass segment return area 70 by inactive bus segment 74b, 76b.
One skilled in the art will appreciate that in order to stop using bus segment, is not that the voltage and current that must will be applied on the electrode of that bus segment is reduced to zero; The value that it is reduced to below selected maximum is just enough, at this maximum place, makes this bus segment substantially inoperative aspect dust removal efficiency.
Similarly, it is not necessary by bypass path 74b, 76b, being arranged in the independent bus segment that is provided with independent electric power source 34b, 36b.A kind of alternative will be, by corresponding disable switch, the electrode of bypass path 74b, 76b is connected to power source 34a, 36a.Like this, the time durations when not expecting to have bypass path, the electrode of bypass path 74b, 76b is operable as the slave unit of bus segment 74a, 76a.As long as while expecting to have bypass path, just can be by by means of disable switch, the electrode of subordinate section 74b, 76b and power source 34a, 36a being thrown off to the electrode of be connected to stop using subordinate section 74b, 76b.
If expect to have permanent bypass path, feasiblely be, during the construction of ESP, provide sparking electrode by a part of only saving as ESP12, and preferably also make this path and can operate any part of the ESP12 of clean air to shield, retaining the bypass path by ESP12.For the remodeling for existing apparatus, this alternative may be also attractive.But the ability that arbitrarily opens or closes bypass path in the operating period of filter has also represented other possibility, this will further illustrate below.
As can be seeing in Fig. 3 a-b, also be connected to the clean control system 64 of the filter bag 60 for controlling bag filter 14 for the control system 40 of the operation of the electrode 30,32 of control bus section 74a-c, 76a-c.The bypass segment 68 that replaces the original air-flow 18 of bypass constantly, preferably change the part of the dust of bypass sometimes in the mode that depends on the time.As an example, may be useful be the coarse bypass segment of bypass dust after cleaning and filtering bag 60 and then, make when dust starts again to deposit on clean filter bag 60, at first will deposit the more coarse dust of one deck.By in this mode, preparing filter bag 60, the filling that they will partly carry out the more tiny dust by receiving from ESP is more insensitive.Hybrid dust particulate collector system for application drawing 3a-b is described in order to prepare the method for filter bag 60 with relatively coarse dirt particle now with reference to Fig. 4.
In step 110, bag filter controller 64 is at least a portion by via clean air nozzle 62, compressed-air actuated jet being discharged into to the filter bag 60 that starts bag filter 14 in filter bag to be cleaned (one or more) 60 clean for example.In step 112, this Event triggered is sent to ESP controller 40 (in this example, controller 40 also plays bypass controller) the bag filter clean signal, make and will make ESP controller 40 know that filter bag 60 is clean now, and be exposed to by tiny dust and clog.
Based on the bag filter clean signal, in step 114, ESP controller 40 opens by stop using all bus segment 74a-c, 76a-c (being whole ESP12) bypass path that leads to bypass return area 70 by ESP12.
In step 116, at the bypass time durations, bypass path stays open, and makes the selected bypass segment 68 of the original air-flow 18 of the bypass segment that carries dust to pass through.The dust carried than the clean air-flow 22 of ESP by before the ESP12 that stops using has this bypass segment of more coarse dirt particle composition and will prepare through clean filter bag 60 now.
Allowing bypass segment 68 by bypass path (being ESP12) afterwards, restart again bus segment 74a-c, 76a-c, remove operation in order to recover the normal dust of ESP12.
For the suitable bypass segment 68 by original gas switches to bypass return area 70, the bypass time (being the duration of bypass), in above-mentioned example, the bypass frequency was identical with the bag filter cleaning frequency preferably based on the bypass frequency.Preferably, select the bypass time, in order to make bypass stay open the time between 2% and 30%, and time between 3% and 20% more preferably.
As making whole flue gas stream bypass by a kind of alternative of ESP, also feasible is only some bus segments of the inactive expectation airflow capacity corresponding to bypass path when opening bypass.As an example, when in step 114, opening bypass path, can bypass path be limited to bus segment 74b, 76b by forbidding only power supply 34b, 36b.In addition, also feasible is to open the bypass path existed, and makes the by-pass existed increase, or closes bypass, makes by-pass reduce.In other words, the bypass of having opened even can further be opened, or the degree of opening of the bypass of opening can reduce, and not exclusively turn-offs bypass.
14 there is the hybrid particle system of long distance from ESP12 to the bag filter, useful can be, short period section after opening bypass path starts the clean of bag filter 14, makes bypass segment will just at clean bag (one or more), arrive the inlet compartment 54 of bag filter 14 at 60 o'clock.
As can be seeing in Fig. 3 a-b, for the control system 40 of the operation of the electrode 30,32 of control bus section 74a-c, 76a-c, be also connected to boiler control system 25.Therefore, also can control based on event in boiler 24 (Fig. 1) opening and closing of bypass path.As an example, thus this event can be the event that the composition of the original gas dirt particle that carried by original air-flow 18 of impact promotes the variation of by-pass.A particular instance is to use the starting of oil as the coal-burning boiler of the starting fuel for preboiler.The comparable coal combustion of oil firing produces more tiny dirt particle; Therefore, in most of the cases, do not expect oil firing flue gas is switched to barrier filter.In addition, can comprise the residue of oleosol from the flue gas of oil firing, this residue can block the filter bag material of bag filter 14, and therefore permanently damages filter bag 60.Fig. 5 shows the example for the progress of starting sequence of the hybrid dust particulate collector system 10 of application drawing 3a-b.
In step 210, boiler control system 25 will start caution signal and be delivered to ESP controller 40, so that notice ESP controller 40 boilers 24 (Fig. 1) will experience progress of starting sequence.
Based on this starting caution signal, in step 212, the ESP controller confirms ESP12 in operation and has cut out any bypass.ESP controller 40 is delivered to boiler control system 25 by confirmation signal.
In response to confirmation signal, in step 214, the burning in boiler 24 starts by boiler control system 25 or by the operator.In this step, use the fuel based on oily to start boiler 25.
In step 216, when the mixture of boiler 24 use oil or oil and coal moves, bypass path keeps closing, and all bus segment 74a-c, the 76a-c of ESP12 all keep operation.
In step 218, boiler control system 25 makes boiler 24 be switched to coal combustion.In the stable normal operating (being that boiler 24 has moved the predetermined time section with 0% oil) of confirming to have obtained boiler, afterwards, boiler control system 25 is delivered to the ESP controller by the normal operating confirmation signal.
Normal operating confirmation signal based on from boiler control system 25, in step 220, ESP controller 40 is for example opened the bypass path by ESP by stop using bus segment 74b, 76b.The bypass path formed like this will allow the bypass segment 68 (described bypass segment 68 carries the bypass segment of dust) of original air-flow 18 to walk around ESP12 now, and the air-flow 22 clean with ESP mixes in bypass return area 70.
Use this progress of starting sequence, feasible is avoids transmitting the harmful bypass segment potentially of original gas dust when the pot furnace oil operates.This optimised in order to be useful especially in the hybrid dust particulate collector system of the clean flue gas from coal combustion process.
The top method of describing with reference to Fig. 4-5 is the example of the situation based on so only: wherein, the event that may desirablely be based in the equipment in the upstream that occurs in hybrid particle collector 10 or downstream is controlled bypass.Recognize, for those skilled in the art, many this situations will be apparent; As an example, can desirablely be also boiler 24 blow ash during reduce by-pass.Another kind of situation when hope reduces bypass or even closes bypass is when one or several filter bag 60 being detected when impaired (this damage of one or several filter bag 60 is detected by control system 64 or detects by the predetermined threshold value of dirt particle exceedance of levels detected in chimney 52).
Obviously, the above is not limited to use in conjunction with the hybrid dust particulate collector system of Fig. 3 a-b with reference to the described method in Fig. 4-5; They also can advantageously be combined with the embodiment of Fig. 1.For this reason, the bypass control valve 72 of Fig. 1 can be configured in order to respond from any one the control signal in control system 25,40 or 64.The method also can be combined with the embodiment be described now with reference to Fig. 6.
The hybrid dust particulate collector system 10 of Fig. 6 comprises electrostatic precipitator (ESP) 12, and ESP12 is to be connected in series with the top similar mode of mode and bag filter 14 with reference to Fig. 1 and 3a-b description.ESP12 has for the ESP entrance 16 of original, air-flow 18 that be loaded with dirt particle and the ESP outlet 20 of clean air-flow 22 for ESP.
Be similar to the electrostatic precipitator of Fig. 1 and 3a-b, the electrostatic precipitator 12 of Fig. 6 is divided into continuous field, but control independently their operation, although this is not essential.In Fig. 6, ESP12 is divided into two fields: first and second, last.Each is provided with several sparking electrode 30 and several passive electrode plates 32; Again, for reason clearly, only schematically show the electrode of first 30,32 of ESP12.Supply electric power to first by means of the first power supply 34, and supply electric power to second by means of the second power supply 36.First of ESP12 further is provided with first bucket 41, the bucket 41 be arranged in first passive electrode plate 32 below, make when the passive electrode plate 32 that knocks first, the part of collecting of original gas dirt particle 44 will fall into first bucket 41 from passive electrode plate 32.Second also is provided with bucket 42.
As top, with reference to as illustrated in Fig. 1, according to its basic principle of operation, ESP12 removes coarse particulate, and to remove fine particles than it more efficient.This means that the dirt particle of being collected by 44 to the second of the parts of collecting of first original gas dirt particle of collecting is more coarse, second dirt particle of collecting transferred more coarse than the tiny dirt particle remained in the clean air-flow of ESP 22.The composition of the particulate that the particulate composition of the part 44 of in fact, collecting is typically carried secretly than original air-flow 18 is further more coarse.
The hybrid dust particulate collector system 10 of Fig. 6 is provided with bypass duct 66, and bypass duct 66 is connected between first bucket 41 and bypass segment return area 70.Bypass duct 66 is configured in order to transmit the bypass segment by the part of collecting 44 of first original gas dirt particle of collecting of ESP12.In order to be conducive to transmission, bypass duct is provided with compressed air pressure fan 72, along bypass duct 66, the bypass segment of described original gas particulate is blown into to bypass segment return area 70.A part by the coarse part 44 that makes to collect in first turns back to bypass segment return area 70, can on bag filter 14, obtain can obtainable dust piece than the original gas dust that uses the direct bypass segment by original air-flow 18 68 to carry the further dust piece of porous more.
In before this with reference to the described embodiment in Fig. 1-5, flow rate that can be by changing original gas bypass segment 68 (for example by change, passing through the size of the flow of control valve or the bypass path by ESP) is controlled the amount that is passed to the dust of bypass return area 70 to be passed.In the embodiment of Fig. 6, as an example, can the dust 44 of collecting be supplied to compressed air pressure fan 72 by the speed to select and control the amount that is passed to the dust of bypass return area 70 to be passed.Those skilled in the art will recognize that the many alternatives that have air blower 72.As an example, can use the spiral conveyer, or can on the fluid bed conveyer, by gravity, the dust of collecting be transported to bypass segment return area 70.
In a word, the above discloses a kind of hybrid dust particulate collector system for clean flue gas stream, and it comprises the electrostatic precipitator of connecting with bag filter.This system is provided with bypass mechanism, switches to the position in the downstream of electrostatic precipitator with the coarse part that will be included in the dust in flue gas stream.The diameter that coarse part comprises certain mass percent is lower than the dirt particle of (fall below) 1 μ m, this mass percent be less than remain in the entrained tiny dust part of the gas clean by electrostatic precipitator, lower than the mass percent of the dirt particle of 1 μ m.Preferably, coarse part also comprises the dirt particle of the diameter of certain mass percent over 30 μ m, and this mass percent is higher than remaining in mass percent in the entrained tiny dust part of the gas clean by electrostatic precipitator, that surpass the dirt particle of 30 μ m.Be transferred to the bypass return area in the downstream of electrostatic precipitator by the coarse bypass segment by dirt particle, can stride across bag filter and obtain lower pressure drop.This provides energy saving, because need energy still less that air-flow is pumped and passed through bag filter.In addition feasible be the broom closet that extends bag filter every, this will reduce the wearing and tearing on filter fabric then, and/or reduce total particulate emission.
Above main with reference to various exemplary embodiments, present invention is described.But, as those skilled in the art easily understand, except top disclosed embodiment, in the scope of the present invention that other embodiment may limit in the patent claims by appended equally.
For example, in above-mentioned example, the fabric filter of operation bag filter type, in order to gather dust on the outside of filter bag.Also can operate filter along contrary direction, in order in mode well known to the skilled person, dust is gathered in the inboard of bag.As the substituting or being combined with bag filter of bag filter, also can realize the present invention with fabric filter and the barrier filter of other type substantially.An example of this barrier filter is at (United States Patent (USP)) US4, the ceramic filter of the type described in 862,813.In addition, the present invention can use in conjunction with for example, for example, boiler for the much dissimilar fuel that burns (coal, waste material, peat and biomass fuel, wood chip).In fact, the invention is not restricted to the clean flue gas from boiler; And can clean by means of the present invention the gas that is loaded with dust of other type of emitting the process (comprising metallurgical process) from other type.
Although, in the embodiment described in detail before this, electrostatic precipitator and barrier filter are illustrated as independent member, they also can be arranged in same housing.And, although boiler, ESP and barrier filter controller 25,40,64 are illustrated as independent member, in fact they can realize on same printed circuit board (PCB), in the same software in same computer or on same computer.Thus, controller 25,40,64 also can be divided into more than three independent control modules.
Can be by one or several bypass ducts, by one or several the inactive paths in ESP or the combination by bypass duct and inactive path, bypass segment is transferred to the bypass segment return area of any amount in downstream of the movable part of ESP.

Claims (22)

1. one kind for removing the method for dirt particle from the original air-flow (18) that comprises the original gas dirt particle at hybrid dust particulate collector system (10), described hybrid dust particulate collector system (10) comprises electrostatic precipitator (12), and the barrier filter (14) that is positioned at the downstream of described electrostatic precipitator (12) with respect to the primary air direction by described system (10), described method comprises:
At least major part of clean described original air-flow (18) in described electrostatic precipitator (12), in order to obtain the clean air-flow part (22) of ESP, and be characterised in that,
The bypass segment of described original gas dirt particle is transferred to outlet (20) or the downstream that is arranged in described electrostatic precipitator (12) and the bypass segment return area (70) that is positioned at the upstream of described barrier filter (14), and described bypass segment has the composition of the dirt particle in the air-flow part (22) clean with remaining in described ESP and compares more coarse dirt particle composition.
2. method according to claim 1, is characterized in that, the described bypass segment bypass segment (68) clean by the not ESP of described original air-flow (18) is carried to described bypass segment return area (70).
3. method according to claim 2, it is characterized in that, bypass segment (68) described not ESP is clean by means of bypass duct (66) is transferred to described bypass segment return area (70) from the bypass inlet zone of the upstream of described electrostatic precipitator (12).
4. method according to claim 2, it is characterized in that, via the inactive part (74b by described electrostatic precipitator (12), the bypass segment (68) that described not ESP is clean of bypass path 76b) is transferred to described bypass segment return area (70), make clean bypass segment (68) transmission of described not ESP by described electrostatic precipitator (12), and can be not cleaned by means of electric field.
5. method according to claim 4, is characterized in that, described method further comprises
At least a portion (74b, 76b) of the temporary transient described electrostatic precipitator (12) of stopping using, in order to produce described bypass path.
6. method according to claim 1, is characterized in that, described bypass segment is included in the part of the described dirt particle (44) that air-flow part (22) clean with described ESP in first of described electrostatic precipitator (12) separates.
7. according to the described method of any one claim in claim 1-6, it is characterized in that, the described bypass segment of described original gas dirt particle reaches the 2-30% of the total amount of the dirt particle in described original air-flow (18) by mass.
8. according to the described method of any one claim in claim 1-6, it is characterized in that, described method further comprises that the amount of the bypass segment that is transmitted to described bypass segment return area (70) is adjusted to the selected amount of bypass segment.
9. according to the described method of any one claim in claim 1-6, it is characterized in that, described method further comprises downstream based on described electrostatic precipitator (12) or the equipment (24 of upstream, 25,14,64) event in is controlled the amount that is passed to the bypass segment of described bypass segment return area (70) to be passed.
10. method according to claim 9, it is characterized in that, the transmission of described bypass segment is controlled in clean startup (110) based on described barrier filter (14), makes described barrier filter (14) be assigned to prepare by described bypass section.
A 11. hybrid dust particulate collector system of removing dirt particle for the original air-flow (18) from comprising the original gas dirt particle, described system (10) comprises electrostatic precipitator (12) and barrier filter (14), described barrier filter (14) is connected to the downstream of described electrostatic precipitator (12), described electrostatic precipitator (12) is configured to so that at least major part of clean described original air-flow (18), in order to obtain the clean air-flow part (22) of ESP, described system is characterised in that
Transmitting device, be configured in order to the bypass segment of described original gas dirt particle is transferred to outlet (20) or the downstream that is arranged in described electrostatic precipitator (12) and the bypass segment return area (70) that is positioned at the upstream of described barrier filter (14), described transmitting device is configured in order to transmit the bypass segment that the composition with the dirt particle in the air-flow part (22) clean with remaining in described ESP is compared more coarse dirt particle composition.
12. hybrid dust particulate collector system according to claim 11, it is characterized in that, described transmitting device is configured to so that the described bypass segment that bypass segment (68) that will be clean by the not ESP of described original air-flow (18) carries is transferred to described bypass segment return area (70).
13. hybrid dust particulate collector system according to claim 12, it is characterized in that, described transmitting device comprises bypass duct (66), and described bypass duct (66) arrives the bypass inlet joint area of the upstream of described electrostatic precipitator (12) on described bypass segment return area (70).
14. hybrid dust particulate collector system according to claim 13, is characterized in that, described bypass duct (66) is provided with control valve (72).
15. hybrid dust particulate collector system according to claim 11, it is characterized in that, described transmitting device comprises the inactive part (74b by described electrostatic precipitator, bypass path 76b), making the clean bypass segment (68) of described not ESP to transmit can be not cleaned by means of electric field by described electrostatic precipitator.
16. hybrid dust particulate collector system according to claim 15, it is characterized in that, described transmitting device further comprises controller (40), described controller (40) is configured to so that in temporarily stop using at least a portion of described electrostatic precipitator (12) of operating period of described hybrid dust particulate collector system (10), in order to produce described bypass path, make the clean air-flow part (68) of described not ESP can transmit by described electrostatic precipitator not cleaned.
17. hybrid dust particulate collector system according to claim 11, it is characterized in that, described transmitting device comprises bypass duct (66), described bypass duct (66) is connected to described bypass segment return area (70) above by the dust collection bucket (41) of first of described electrostatic precipitator, and described bypass duct (66) is configured to so that the dust of collecting (44) that clean with described ESP air-flow (22) is separated is transferred to described bypass return area (70).
18. the described hybrid dust particulate collector system of any one claim according to claim 11 in 17, is characterized in that, described transmitting device is suitable for the transmission 2-30% of the total amount of the dirt particle in described original air-flow (18) by mass.
19. according to claim 11 to the described hybrid dust particulate collector system of any one claim in 17, it is characterized in that, described transmitting device further comprises the control system (40) of transmission of leading to the described bypass segment of described bypass segment return area (70) for control.
20. hybrid dust particulate collector system according to claim 19, it is characterized in that, described control system (40) is configured to so that the equipment (24 of the downstream based on described electrostatic precipitator (12) or upstream, 25,14,64) event in is controlled the amount that is passed to the bypass segment of described bypass segment return area (70) to be passed.
21. hybrid dust particulate collector system according to claim 20, it is characterized in that, described control system (40) is configured to so that the described transmission of described bypass segment is controlled in the clean startup (110) based on described barrier filter (14), makes described barrier filter (14) be assigned to prepare by described bypass section.
22. the described hybrid dust particulate collector system of any one claim according to claim 11 in 17 is characterized in that described electrostatic precipitator (12) and described barrier filter (14) are included in same housing.
CN201010539247.2A 2009-10-28 2010-10-28 Hybrid dust particulate collector system Expired - Fee Related CN102069035B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09174340.1A EP2316576B1 (en) 2009-10-28 2009-10-28 Hybrid dust particulate collector system
EP09174340.1 2009-10-28

Publications (2)

Publication Number Publication Date
CN102069035A CN102069035A (en) 2011-05-25
CN102069035B true CN102069035B (en) 2014-01-08

Family

ID=41718663

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010539247.2A Expired - Fee Related CN102069035B (en) 2009-10-28 2010-10-28 Hybrid dust particulate collector system

Country Status (6)

Country Link
EP (1) EP2316576B1 (en)
CN (1) CN102069035B (en)
DK (1) DK2316576T3 (en)
ES (1) ES2421715T3 (en)
PL (1) PL2316576T3 (en)
PT (1) PT2316576E (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2599556B1 (en) * 2011-11-29 2021-06-30 General Electric Technology GmbH A method for cleaning an electrostatic precipitator
SG11201503712TA (en) * 2012-12-03 2015-06-29 Emd Millipore Corp Methods and devices used for redundant sterile filtration
CN105327781B (en) * 2014-08-13 2017-12-29 戴若夫 Except haze VMC actively cleans the control method and system of electrostatic precipitation filter
CN104190537B (en) * 2014-08-19 2017-03-29 阮海生 A kind of DEP purifying treating units
CN104307638B (en) * 2014-08-19 2017-05-24 阮海生 Efficient DEP electrode structure, plate electrode formed therefrom and electrode array
CN104174492B (en) * 2014-08-22 2017-03-29 成都代代吉前瞻科技股份有限公司 A kind of high efficiency electrostatic dielectrophoresises cleaner unit
CN105709931B (en) * 2016-02-02 2020-06-02 青岛海尔智能技术研发有限公司 Electrostatic precipitator air purifier
CN105536422B (en) * 2016-03-18 2017-11-03 温州职业技术学院 Multifunctional domestic removes haze air intake equipment
CN106110797A (en) * 2016-08-29 2016-11-16 南丹县南方有色金属有限责任公司 The blow-on fume environment protection of zinc sulfide concentrates fluidized roaster processes technique
CN110478993A (en) * 2019-08-12 2019-11-22 常州锡联环保科技有限公司 A kind of processing system of domestic sludge incineration flue gas
CN114602654A (en) * 2022-04-07 2022-06-10 张家口宣润冶金环保设备有限公司 Composite smoke dust electric dust remover

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317661A (en) * 1977-03-16 1982-03-02 Matsushita Electric Industrial Co., Ltd. Electronic air cleaner
US4871515A (en) * 1987-07-16 1989-10-03 Man Technologie Gmbh Electrostatic filter
US5024681A (en) * 1989-12-15 1991-06-18 Electric Power Research Institute Compact hybrid particulate collector
DE4208204C1 (en) * 1992-03-14 1993-03-18 Metallgesellschaft Ag, 6000 Frankfurt, De
CN101115565A (en) * 2005-02-10 2008-01-30 阿尔斯托姆科技有限公司 Method and apparatus for the acceleration of an electromagnetic rapper

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733784A (en) * 1971-10-05 1973-05-22 Air Preheater Electro-bag dust collector
JP2008012060A (en) 2006-07-05 2008-01-24 Daikin Ind Ltd Air cleaner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317661A (en) * 1977-03-16 1982-03-02 Matsushita Electric Industrial Co., Ltd. Electronic air cleaner
US4871515A (en) * 1987-07-16 1989-10-03 Man Technologie Gmbh Electrostatic filter
US5024681A (en) * 1989-12-15 1991-06-18 Electric Power Research Institute Compact hybrid particulate collector
DE4208204C1 (en) * 1992-03-14 1993-03-18 Metallgesellschaft Ag, 6000 Frankfurt, De
CN101115565A (en) * 2005-02-10 2008-01-30 阿尔斯托姆科技有限公司 Method and apparatus for the acceleration of an electromagnetic rapper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP特开2008-12060A 2008.01.24

Also Published As

Publication number Publication date
PT2316576E (en) 2013-07-18
EP2316576A1 (en) 2011-05-04
ES2421715T3 (en) 2013-09-05
PL2316576T3 (en) 2013-10-31
DK2316576T3 (en) 2013-07-29
EP2316576B1 (en) 2013-05-29
CN102069035A (en) 2011-05-25

Similar Documents

Publication Publication Date Title
CN102069035B (en) Hybrid dust particulate collector system
CA2789412C (en) Advanced particulate matter control apparatus and methods
US7883558B2 (en) Electrostatic particulate separation for emission treatment systems
CN102811791A (en) Dust removal device and method of high-capacity filter bag house
CN100999670A (en) Smoke preventing and dust removing for tamping coking oven side filling coal and vehicle of smoke preventing and dust removing
CN202516516U (en) Dedusting system of asphalt mixing equipment
JP5544913B2 (en) Fly ash recovery system, metal piece removing apparatus and metal piece removing method
CN101837216B (en) Electrostatic-bag composite dust-collector
KR100344756B1 (en) Dust collecting apparatus
CN101658747B (en) Sound-wave bag-type dust removal device
CN104990087A (en) Ash removal device
CN107743420A (en) Flyash separates and retracting device
CN205346331U (en) Waste incineration fly ash&#39;s infrasound conveying system
Buzduga et al. Solutions to reduce the environmental pollution by the producers of refractories
CN105013596B (en) Difficult ore grinding sorting substances device and sorting process in coal pulverizer circulating load
Gebert et al. A new filter system, combining a fabric filter and electrostatic precipitator for effective pollution control behind cement kilns
JPH10216560A (en) Treatment of ash of electrostatic precipitator
JP3975041B2 (en) Pyrolysis residue treatment apparatus and waste treatment system
JP7077021B2 (en) Dust collector
CN209934291U (en) Pulse cloth bag dust removal device of biomass boiler
US2391860A (en) Steam generator furnace
CN203484016U (en) Bag filter
CN207822725U (en) A kind of dust pelletizing system of centrifugation dryer
JPH06257463A (en) Dust removing system for pressure fluidized-bed boiler compound electric power plant
JP3906175B2 (en) Cleaning system for convection heat transfer section in circulating fluidized bed boiler

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: Baden, Switzerland

Patentee after: GENERAL ELECTRIC TECHNOLOGY GmbH

Address before: Baden, Switzerland

Patentee before: Alstom Technology Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20220523

Address after: Sweden 'Vic Coase

Patentee after: Andritz aktiebor AG

Address before: Baden, Switzerland

Patentee before: GENERAL ELECTRIC TECHNOLOGY GmbH

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140108