CN1080566A - The cyclone dust collectors of static electrification-fabric filter - Google Patents
The cyclone dust collectors of static electrification-fabric filter Download PDFInfo
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- CN1080566A CN1080566A CN 92104772 CN92104772A CN1080566A CN 1080566 A CN1080566 A CN 1080566A CN 92104772 CN92104772 CN 92104772 CN 92104772 A CN92104772 A CN 92104772A CN 1080566 A CN1080566 A CN 1080566A
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Abstract
A kind of " cyclone dust collectors of static electrification-fabric filter " belong to separation, mixing equipment and technology.In the inner cylinder (4) of cyclone dust collectors, install one and purify pipe (5), be provided with in this pipe the high voltage electric field that makes pre-charged dust and cohesion and can filtration fraction or all in the double purification devices such as fabric filter bag of eddy current dusty gases, can increase substantially the purification efficiency of existing cyclone dust collectors.Its gross decontamination efficient also can be adjusted, and is up to 99%, drag overall＜1500Pa.Be applicable to the clarifying smoke of middle and small burn coal boiler, can reach the strictest discharging standards.Occupation of land and investment are lower than other high-efficiency dust removers.
Description
The present invention is a kind of " cyclone dust collectors of static electrification-fabric filter ".Belong to separation, mixing equipment and technology.
Cyclone dust collectors are a kind of cleaning equipments that utilize centrifugal force that dust is separated from air-flow.Usually only be suitable for the dust of particle diameter in the capture in flue gas＞5 micron, ideal efficiency about 90%.Current, it is still with simple in structure, reduced investment, convenient management and be widely adopted though various high-efficiency dust remover has come out.
In prior art, a kind of " cyclone electrostatic precipitator " introduced by the former Soviet Union " industrial labor safety " magazine (NO.3 in 1975, P.36～37), is applicable to the air cleaning of the high degree of dispersion fine dust that contains the dryness that has or not explosion danger.It is to be provided with many acupunctures and to constitute corona discharge electrode on the outer surface of the metal inner cylinder of common cyclone dust collectors, and the inner cylinder upper end is made with insulating materials and made it and other SI semi-insulations.After corona discharge electrode is connected high-tension electricity, form high voltage electric field between inside and outside cylinder, air produces ionization, makes in the gas the charged and cohesion back of fine dust under electric field force and inertia force act on simultaneously, deposits on the shell body of this " cyclone electrostatic precipitator " and with descending air-flow and brings ash bucket into.This cyclone electrostatic precipitator is to 0.5～15 micron dust purification rate nearly 95%, and the performance of general cyclone dust collectors is significantly increased.But this technology has following defective: 1. equipment does not have deashing device, after the long-time running on acupuncture and the barrel dust stratification will cause that corona current reduces, electric field force weakened so that influence purification efficiency.2. be not suitable for the flue gas ash removal that contains certain humidity.Reason is the inconvenience of insulated part deashing, when dust stratification thicken make moist after during untimely again cleaning, can produce the high pressure leaky, until applying high pressure and lost efficacy to corona discharge electrode.
The common all cyclone dust collectors of the various models of adapted of middle-size and small-size coal-burned industrial boiler that China is a large amount of.In actual motion, bad, mismanagement is installed in, manufacturing improper because of type selecting, and the efficiency of dust collection of cyclone dust collectors is sharply descended.The smoke contamination situation that causes therefrom is quite serious.And use sack cleaner instead or electric cleaner might not be suitable under actual conditions.For solving the problem that existing Industrial Boiler flue gas ash removal technology exists, seek a kind of occupation of land less, reduced investment, be easy to and efficient cleaning equipment that the technological transformation of existing cyclone dust collectors combines, be to improve the air environmental pollution situation to press for.The performance that the present invention is devoted to improve cyclone dust collectors for this purpose is efficiency of dust collection particularly, and notice the development of the deficiency and the modern pre-charged dust technology of above-mentioned in the prior art " cyclone electrostatic precipitator ", be developed into " cyclone dust collectors of static electrification-fabric filter ".It will solve the clarifying smoke of medium small boiler effectively, make it to meet the requirement of the strictest discharging standards, also provide effective means for the environmental management system of carrying out " overall control ".Particularly a large amount of existing boiler smokes is administered, not to solve with the technology path that is replaced with other new and effective dedusters, but still be based on the used cyclone dust collectors, make it bring up to new height and satisfy environmental requirement, have very strong realistic meaning and the effect that gets twice the result with half the effort through technological transformation.
The present invention realizes like this.Its structure as shown in Figure 1.
Invent in the inner cylinder of taking at cyclone dust collectors (4), install one with one heart and purify pipe (5), it be one by body and air outlet (12), M shape filter bag (6), high-tension electricity hachure (7), insulator (8) and (17), insulating sleeve (9), the filter bag framework (10) that the double as positive plate is used, stay pipe (11), the annular blowing device (14) that the filter bag ash removal of double as loam cake is used, remove high-tension electricity hachure (7) and go up the vibrating rod (16) that dust stratification is used, the fixing fixed leg (18) that makes by insulating materials used of high-tension electricity hachure metal bracket, " static-fabric filter " that stage clip critical pieces such as (19) is formed.Purify pipe (5) lower ending opening position near the inside and outside eddy current place of turning back of cyclone dust collectors and be in interior vortex.
Among the present invention, the structure that purifies pipe (5) amplifies referring to accompanying drawing 2.Purify pipe (5) lower ending opening, the upper end is by the sealing of annular blowing device (14) double as loam cake, and its side sets out air port (12).Annular blowing device (a 14) central vertical fixed installation stay pipe that makes by steel pipe (11), it is screwed into insulator (8) and (17) respectively in two ends up and down, the vibrating rod (16) that thin slightly steel pipe of middle suit is made, vibrating rod (16) upper end has pressure transmitting plates to withstand winding-up short tube on the blowing device (14), the lower end contacts with fixed leg (18), relies on the stage clip (19) between fixed leg (18) and insulator (17) to hold out against.The through hole that the high-voltage connection that is with insulating sleeve (9) outward passes in the middle of insulator (8), vibrating rod (16), the fixed leg (18) from the top that purifies pipe (5) connects with the corona wire metal bracket that is contained in fixed leg (18) lower end, and high direct voltage is caused corona wire (7).Corona wire (7) is turned back vertically upward after being radial arrangement and being connected on the corona wire metal bracket again.From the cross section, each root corona wire is evenly arranged in equidistantly on a circle of inside and outside two filter bag frameworks (10), it and the insulation of whirlwind metal cylinder.Filter bag framework (10) is the cylinder made from the metallic plate or the net of porous, is connected and fixed by suspension bracket (19) and purification pipe (5) tube wall.Filter bag framework (10) divides inside and outside two-layer, is made for the support of the ectonexine fabric of M shape filter bag (6) respectively.The positive plate of filter bag framework (10) double as high voltage electric field is used.The dust stratification face of the two-layer filter bag between two positive plates is all towards therebetween corona wire (7).After going up the connection DC high-voltage power supply, promptly form high voltage electric field between corona wire (7) and filter bag framework (10) at corona wire (7).After eddy current entered from purification pipe (5) lower openings in the dust-laden, dust was charged and cohesion, captures and is attached on the filter bag dust stratification face by M shape filter bag (6) again.Purified gas passes M shape filter bag (6) and filter bag framework (10) comes together in air outlet (12) discharge.The annular blowing device (14) that is provided with on M shape filter bag (6) top is pressed predetermined instruction and is started, can be against air-flow to spraying the high-voltage pulse air-flow with the dust stratification on the cleaning filter bag outer layer surface.Meanwhile, high-voltage pulse air stream drives pressure transmitting plates drives vibrating rod (16) bump corona wire (7) and makes it vibration, removes dust stratification.
The present invention is provided with the radiation shield (15) of ash bucket (3) bottom under being positioned in the below that purifies pipe (5) lower openings.Radiation shield (15) which floor umbrella hood is made of, and the effect of outer umbrella hood is in eddy current changes into outside during eddy current, guides it to enter the circular passage respectively and purifies pipe (5); Making isolated dust in the outer eddy current fall into down the control of dust part of ash bucket (3) by the slit between umbrella hood and following ash bucket (3) simultaneously returns on unlikely.The effect of internal layer umbrella hood is to stop the dust that cleans in the purification pipe (5) to return in the interior eddy current, makes its major part be directed into down the control of dust part of ash bucket (3) bottom.
When the present invention was used to purify flue gas, if flue-gas temperature is lower than 200 ℃, M shape filter bag can be selected resistant to elevated temperatures chemical fibre filtrate for use; If be higher than 200 ℃, then should select stainless steel fibre fabric filtrate for use.
The present invention then can constitute a kind of novel " cyclone dust collectors of narrow fabrics filter " as pre-charged parts such as corona wire (7) are not installed.Because dust is without charged in advance, thus attached on the filter bag time denser, resistance increases fast, the deashing frequency improves.
Dusty gas enters at a high speed from deduster air inlet (1), forms outer eddy current from top to bottom for the helical movement along outer cylinder (2).Under centrifugal action, in the air-flow grit get rid of to barrel and be subjected to gravity and outside the drive that moves downward of eddy current, fall into down ash bucket (3) along wall.Outer eddy current arrives cone base and promptly rises to interior eddy current, enters inner cylinder (4) back along the deduster center and discharges.In the present invention because purification pipe (5) is housed in the inner cylinder (4), also form one " circular passage " between the two, an eddy current part enters and purifies pipe (5) in the dust-laden after whirlwind just purifies, purifies the back again by " static-fabric filter " in the pipe and discharges from its air outlet (12); In another part dust-laden eddy current then through above-mentioned circular passage the air outlet (13) from inner cylinder (4) discharge.This two parts air-flow is efflux gas after mixing.
Test shows, when the gas of dust content≤500 milligram/mark cubic meter passes through electric field, when dust obtains being captured by filter bag after fully pre-charged again, even at (about 10 meters/minute) under the higher filtration velocity, also can keep high purification efficiency (＞99%), and the resistance rate of rise of filter bag and drag losses are low during all obviously than no pre-charged device, not only reduced the deashing number of times but also saved the power consumption of dust pelletizing system.
This shows, above-mentioned by purifying the interior eddy current of dust-laden after pipe (5) purifies again, dust-laden not almost after the discharge.Be appreciated that the efflux gas of discharging and mixing from two outlets (12) and (13), its dust content will be with purified the increasing and reduce of percentage that throughput that pipe (5) purifies again accounts for interior eddy current total amount proportionally.That is to say size or the special throttling action that throttling arrangement produced that is provided with of utilizing aforementioned circular passage therebetween, can regulate to enter and purify pipe (5) and be subjected to the interior eddy current amount that purifies again, the percentage of eddy current total amount in this amount accounts for promptly is the percentage that the present invention reduces the dust content of eddy current in the dust-laden that whirlwind just purifies again.It is definite that these characteristics make gross decontamination efficient of the present invention and drag overall regulate as requested then, thereby produce the series of products of different purifying rates.It is different from the series of products that general deduster forms with the different disposal air quantity.
When the higher efficiency of dust collection of needs, can increase the interior eddy current amount that purifies pipe (5) that enters, until all through purifying again.Use this moment and purify pipe (5) replacement inner cylinder (4), or the air outlet (13) of closing inner cylinder (4).Though SR increases like this, total efficiency of dust collection can be up to more than 99%.The present invention has optimized the performance of this common dust arresters of cyclone dust collectors in this way greatly, has enlarged it to applicability that purifies the high degree of dispersion fine dust and the efficient that increases substantially dust purification.
About the control of deashing device, the level pressure difference controller that the present invention adopts common sack cleaner to adopt is carried out.Because in fact the interior eddy current amount by circular passage and purification pipe (5) all is constantly to change, when M shape filter bag (6) dust stratification or just during deashing not, the throttle resistance (higher limit) that the initial resistance that purifies pipe (5) produces during by the design code flow than the circular passage is low, so this moment, the interior eddy current amount by M shape filter bag (6) was greater than the flow when filter bag needs deashing, thicken with the filter bag dust stratification, resistance strengthens, and this flow reduces gradually.Corresponding, the interior eddy current amount that originally flows through the circular passage is lower than design code, diminishes and increases gradually and reach the design code amount with purifying in the pipe (5) flow then, and the resistance that produced this moment reaches higher limit.Level pressure difference controller sends the annular blowing device of instruction control (14) M shape filter bag (6) is carried out the pressure reduction controlling value of deashing, promptly determines by this higher limit.
For reducing drag losses of the present invention, adopt two ways: the inlet velocity (usually about 20m/s) of (one) restriction cyclone dust collectors; (2) when handling equal exhaust gas volumn, select for use the cyclone dust collectors of large-size to make parent.After adding the drag losses that " static-fabric filter " produced in the purification pipe (5) like this, control drag overall loss of the present invention and be lower than 1500Pa.
In sum, the present invention is different from cyclone dust collectors or cyclone electrostatic precipitator and static bag hose in the prior art on dust removal mechanism and apparatus structure.It is a kind of novel compound high-effective dust-removing equipment that utilizes centrifugal force, electrostatic force, adhesion three to combine, and fine powder is also had very high purification efficiency.Be applicable to middle-size and small-size coal-burned industrial boiler flue gas ash removal, also be applicable to the udst separation of the general dusty gas of other industry.The present invention is particularly suitable for transforming the cyclone dust collectors of a large amount of existing coal-burning boiler institutes widespread usage, makes it to increase substantially clarifying smoke efficient, reduces discharge capacity significantly.And do not increase occupation of land, reduced investment, simple and easy, the transformation convenience of installation.
Claims (5)
1, a kind of additional cyclone dust collectors that composite dedusting device and bottom reflection screen (15) are arranged that separate mixing equipment and technology that belong to, it is characterized in that: this " cyclone dust collectors of static electrification-fabric filter " are in the inner cylinder (4) at cyclone dust collectors, install one with one heart and purify pipe (5), this purify pipe (5) be one by purifying pipe body and its air outlet (12), M shape filter bag (6), high-tension electricity hachure (7), insulator (8) and (17), insulating sleeve (9), the filter bag framework of using as positive plate (10), stay pipe (11), annular blowing device (14), vibrating rod (16), fixed leg (18), a kind of " static-fabric filter " that stage clip critical pieces such as (19) is formed; Purify between pipe (5) and the cyclone dust collectors inner cylinder (4) and form one " circular passage ", utilize its size or the special throttling action that throttling arrangement produced that is provided with therebetween, can regulate to enter and purify pipe (5) and be subjected to the interior eddy current amount that purifies again, the percentage of eddy current total amount in this amount accounts for, it promptly is the percentage that the present invention reduces the dust content of eddy current in the dust-laden after whirlwind just purifies again, then make gross decontamination efficient of the present invention and drag overall, can regulate as requested definite, thereby produce the series of products of determining the branch style number with different purifying rates.
2, " cyclone dust collectors of static electrification-fabric filter " as claimed in claim 1, it is characterized in that: its lower ending opening of said purification pipe (5), there is the annular blowing device (14) and the air outlet (12) of double as loam cake the upper end, annular blowing device (a 14) central vertical fixed installation stay pipe that makes by steel pipe (11), its two ends are screwed into insulator (8) and (17) respectively, one of middle suit is the vibrating rod (16) that makes of fine steel tube slightly, vibrating rod (16) upper end has pressure transmitting plates to withstand winding-up short tube on the blowing device (14), the lower end contacts with fixed leg (18), relies on the stage clip (19) between fixed leg (18) and insulator (17) to hold out against; The through hole that the high-voltage connection that is with insulating sleeve (9) outward passes in the middle of insulator (8), vibrating rod (16), the fixed leg (18) from the top that purifies pipe (5) connects with the corona wire metal bracket that is contained in fixed leg (18) lower end, high direct voltage is caused corona wire (7), and corona wire (7) is turned back vertically upward after being radial arrangement and being connected on the corona wire metal bracket again; From the cross section, each root corona wire is evenly arranged in equidistantly in inside and outside two, on the circle of filter bag framework (10), and it and the insulation of whirlwind metal cylinder; Filter bag framework (10) is the cylinder made from expanded metal or net, connect fixing by suspension bracket (20) and purification pipe (5) tube wall, filter bag framework (10) divides inside and outside two-layer, be made for the support of the ectonexine fabric of M shape filter bag (6), the positive plate of filter bag framework (10) double as high voltage electric field is used; The dust stratification face of the two-layer filter bag between two positive plates is all towards therebetween corona wire (7); Dust stratification on the reverse ejection high-voltage pulse air-flow cleaning of annular blowing device (14) the energy filter bag of M shape filter bag (6) top setting drives vibrating rod (16) bump corona wire (7) simultaneously, makes it vibration and the removing dust stratification.
3, " cyclone dust collectors of static electrification-fabric filter " as claimed in claim 1 is characterized in that: the residing position of lower openings that purifies pipe (5) is near the inside and outside eddy current of the cyclone dust collectors place that turns back, and is in interior vortex.
4, " cyclone dust collectors of static electrification-fabric filter " as claimed in claim 1, it is characterized in that:, then use and purify the air outlet (13) that pipe (5) replaces inner cylinder (4) or closes inner cylinder (4) when interior eddy current needs all purify when obtaining the highest purification efficiency again.
5, " cyclone dust collectors of static electrification-fabric filter " as claimed in claim 1, it is characterized in that: when the deduster drag overall can be allowable, all devices of relevant pre-charged dust can omit among the present invention, thereby constitute another kind of " cyclone dust collectors of narrow fabrics filter ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104772 CN1080566A (en) | 1992-06-20 | 1992-06-20 | The cyclone dust collectors of static electrification-fabric filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104772 CN1080566A (en) | 1992-06-20 | 1992-06-20 | The cyclone dust collectors of static electrification-fabric filter |
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| CN1080566A true CN1080566A (en) | 1994-01-12 |
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| CN 92104772 Pending CN1080566A (en) | 1992-06-20 | 1992-06-20 | The cyclone dust collectors of static electrification-fabric filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450579C (en) * | 2006-12-22 | 2009-01-14 | 董俊 | Wet nanometer grade vortex dust-removing device and dust removing method |
| CN102324677A (en) * | 2011-09-28 | 2012-01-18 | 张宏伟 | Live brush replacement and toner collection device for generator |
| CN103018145A (en) * | 2012-10-12 | 2013-04-03 | 桂林电子科技大学 | Novel real-time PM2.5 (particulate matter 2.5) mass concentration monitoring device and monitoring method |
-
1992
- 1992-06-20 CN CN 92104772 patent/CN1080566A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450579C (en) * | 2006-12-22 | 2009-01-14 | 董俊 | Wet nanometer grade vortex dust-removing device and dust removing method |
| CN102324677A (en) * | 2011-09-28 | 2012-01-18 | 张宏伟 | Live brush replacement and toner collection device for generator |
| CN103018145A (en) * | 2012-10-12 | 2013-04-03 | 桂林电子科技大学 | Novel real-time PM2.5 (particulate matter 2.5) mass concentration monitoring device and monitoring method |
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