CN2239285Y

CN2239285Y - Pleated bag type air filter

Info

Publication number: CN2239285Y
Application number: CN95215193U
Authority: CN
Inventors: 王炳暄; 王冠峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-30
Filing date: 1995-06-30
Publication date: 1996-11-06
Anticipated expiration: 2005-06-30

Abstract

The utility model relates to a pleated bag type air filter used for purifying, collecting dust in the air and recycling powder material, which adopts a pleated bag type filter core with a plurality of longitudinal wrinkles, and filter cloth is folded into a plurality of wrinkles by the rigid frame of the pleated bag and is tightly bound among a plurality of steel bars. The utility model has higher filter efficiency, smaller volume and larger filter air quantity. The integral dimension of the utility model is reduced, the steel for manufacturing box bodies can be reduced by 20%-40%, and the utility model has the advantages of small volume, material saving, labor saving, easy installation and repair, long service life of the filter cloth, etc. The utility model is suitable for being used in the engineering of large and medium air volume dedusting systems, industrial dust recycling, etc., the cost and the operation expense can be reduced, and the utility model can be used in an air purification and defogging device.

Description

The pleat bag type air cleaner

The utility model is a kind of neotectonics that is used for the industrial waste gas dedusting and reclaims a kind of filter of powder and air cleaning and mist elimination.

Flue dust in the industrial waste gas etc. can cause atmosphere pollution, must discharge after dust removal process.Be entrained with the dust of solid product in the industrial discharge gas of some occasion, must recycle.Two kinds of different purposes all relate to dedusting technology, seem more and more important in the modern industry development.Its process has inertia, centrifugal separation, cloth bag filtration method, washing type process of cleaning and Cottrell process etc.Wherein inertia, centrifugal separation can only be effective to the above thick dirt of tens of microns, claim thick dedusting.Further requiring to remove ten microns methods commonly used of dust up and down is the cloth bag filtration method, and the washing type dedusting needs the supporting engineerings such as water treatment and water supply and sewage that have, electrostatic precipitation has certain requirement to the resistance value of dust, and factor such as cost and operating cost be higher, on using limitation is arranged all.Cloth envelop collector adaptability is better, the application surface broad.The cloth bag form that has cloth envelop collector now has circular bag, oval bag and flat bag three kinds by its section configuration branch, pulsed, back flushing type, mechanical vibrator formula, high frequency waves oscillatory type are arranged and exempt from clearly formula etc. multiple by the purge mode branch, handle air quantity from hundreds of cubes to hundreds thousand of cubes various scales per hour.Along with industrial large-sizedization development, big air quantity treatment system develops in a large number, but cloth envelop collector remains handling shortcomings such as wind speed is low, the equipment overall dimensions is huge, deashing is frequent, the filter bag life cycle is short and seems incompatible.Improve more to the research on the filter material in recent years, except that generally adopting at present the closely knit non-weaving cloth filter material of chemical fibre replace cotton weaves cotton cloth, there is the filter cloth surface to add the compound filter material development of synthetic material coating again, and electrostatic fibre filter cloth, with non-woven filter cloth of activated carbon fiber etc., all obtained application achievements.There is dust layer to help filter to evolve from filtration mechanism and is the trend of surface filtration.More than these develop into to improve strainability and reduce pressure reduction and achieve notable results, yet it is very little that the overall dimensions of filter is reduced its effect.The inventor thinks that the improvement to filter bag structure can help the further raising of cloth envelop collector technology and perfect.

The purpose of this utility model is to provide a kind of pleat bag type air cleaner of novel and high-efficiency rate, can reach bigger processing air quantity under smaller volume, and filter cloth is worked under the optimization state, caters to the development of novel filtering material.

Technical characterictic of the present utility model is the cloth bag that is substituted prior art by the less pleat bag type filter element of size.The casing of pleat bag type filter is separated into the air-purifying chamber on top and dust-settling compartment two parts of bottom by dividing plate, be evenly distributed with circular hole on the dividing plate, pleat bag type filter element inserts dust-settling compartment from the clean room by circular hole, and fix by the ring flange and the dividing plate plane of pleat bag type filter element top edge, lining is gone into a cushion film therebetween.Dusty gas enters dust-settling compartment by the import of dirt gas, and because of the thick dirt in the flow velocity down current falls immediately, thin dirt is brought to pleat bag type filter element by ascending air and is blocked in the surface of filter cloth, and clean gas sees through filter cloth and enters air-purifying chamber, discharges from the pure qi (oxygen) outlet again.The same dust-settling compartment bottom that falls into of the thick dirt of laying dust that falls from the filter cloth set of surfaces in the deashing process and automatic sedimentation is released by ash ejector.Pleat bag type filter element has a special pleat bag rigid mount, cladding has filter cloth around it, effect by pleat bag rigid mount makes filter cloth draw into many equally distributed vertical pleats ravine, its cross section becomes a polygonal star, make the surface area of filter cloth that the increase of several times is arranged like this, its length dimension of comparing with existing cloth bag can be kept to 1/4～1/8.How much being decided by between the star angle apart from guaranteeing the unimpeded of filtered airflow of star angle, and be evenly distributed on each surface of filter cloth, generally selecting for use is 20～40 jiaos.The degree of depth in its pleat ravine can be greater than 3～6 times of star angular separation, and this multiple is the main factor that the decision filter area increases multiple, but the degree of depth in pleat ravine between can having influence at the bottom of the two adjacent star angles spacing and the cross-sectional sizes of central through hole.For avoiding clean gas discharge flow resistance excessive, the pleat ravine degree of depth generally is not more than 1/3 of star point diameter.The length of filter core also is another factor that increases the central through hole load, and the draw ratio of pleat bag type filter element is generally placed restrictions between 3～8 for this reason.The structure of pleat bag rigid mount is; The top has discoidal center to have star hole ring flange, the bottom of polygonal star-shaped aperture that one star base plate is arranged, has that 3～6 vertical rod spacings are fixed between the two, the vertical rod middle part is equally spaced 1～3 with grommet, star the top of the horn that star hole ring flange parallels have an outer steel bar, star angle up and down between corresponding every angle at the bottom of between respectively be installed with an interior steel bar.Star hole ring flange outer toroid partly is and the filter dividing plate usefulness that is connected and fixed, is evenly equipped with screw hole on the circumference.The star angle number of star base plate and star hole ring flange equates and corresponding mutually up and down assembling that promptly the star angle consistency from top to bottom in the star the top of the horn of star base plate and flange discoctaster hole, star hole is by the vertical rod positioning and fixing.All be drilled with a small sircle hole at the bottom of each the star the top of the horn of star hole ring flange and star base plate and the star angle, star the top of the horn small sircle hole is positioned at the outer ring and penetrates outer steel bar earlier and use fixed by nut.When being stitched into after filter cloth cylindraceous is enclosed within outside the pleat bag rigid mount, the filter cloth between the two outer steel bars is folded at the bottom of the star angle, in small sircle hole at the bottom of the star angle, penetrate interior steel bar again, make its retaining side outside filter cloth.One by one filter cloth being rolled over the end penetrates interior steel bar, and uses fixed by nut, so just constitutes filter cloth and passes repeatedly outside the outer steel bar within the interior steel bar, makes filter cloth tight, and the filter cloth around the filter core forms many vertical pleat ravines uniformly, and its section becomes a polygonal star.Filter cloth holds outer steel bar and interior steel bar repeatedly, also makes filter cloth be divided into many strip fritters.Be subjected to the effect of dust-contained airflow blast stressed during filter cloth work in outer steel bar, for preventing that outer steel bar from having crooked possibility, in the section of grommet, can increase band support silk, its little ring is passed by outer steel bar, two tail ends then insert in the slotted eye of grommet, each band support silk supports an outer steel bar, and the band support silk that is circle distribution forms a polygonal star again.When relatively poor or gas permeability is relatively poor when some filter cloth intensity, should avoid the filter cloth can be under the blast effect as the varicose backward of sail shape, drawing into two back sides partly is close to together, reduce effective filtration area, in the case can be at filter cloth back side lining steel wire, adopt the gross porosity steel wire to be bent into pleat ravine shape and overlap earlier outside on the steel bar, put filter cloth again filter cloth is set off.Consider that reducing interference and the pleat bag type filter element of going up ash in the deashing packs into every the convenience of pulling circular hole, pleat bag type filter element also can be designed to the back taper bodily form, and is big up and small down, and its tapering generally can be selected in 4 °～12 ° scopes.For solving the sealing of filter cloth two terminations, on the lower plane of pulling at the bottom of plane and the star on the ring flange of star hole also the design have leg-of-mutton on compress pull and following presser foot, when turn over behind the outerplanar of star angle the filter cloth termination of Xing Jiao both sides, cover presser foot, tighten screw, the cloth end is pressed between two plates, and the filter cloth termination on the Xing Jiao both sides of small-sized filter core can be integrated with linear slit involutory back, keeps seamless between filter cloth and star hole ring flange and star base plate.Star hole ring flange, star base plate, go up presser foot, the general available steel plate drawing of presser foot down, zinc-plated or the chromated aluminum alloy is antirust.Outer steel bar and interior steel bar are made with cold drawn first steel, alloy plating after the surface finish, so that the surface has extremely low adhesive performance to avoid dust stratification, and the also available highstrenghtpiston's compression molding of the star hole ring flange of small-sized pleat bag type filter element and star base plate.The filter cloth kind of pleat bag type filter element can require apolegamy according to difference; During as the industrial waste gas dedusting, select for use compact-type industry to filter non-weaving cloth.Select compound non-woven filter cloth when reclaiming powder for use.When being used for the air cleaning processing, can select the low fine and closely woven non-woven filter cloth of flow resistance for use, then can be as removing a small amount of chemical gas in the purified gas in filter cloth back side lining layer of active carbon fiber cloth.Therefore say that the filter cloth of the various performances of pleat bag type filter element adapted can reach multiple application aims, when being used for dedusting work, need be furnished with deashing device during global design, the same backblowing, electric and magnetic oscillation method and the high frequency waves succusions etc. selected for use with prior art are supporting, when handling, air cleaning and mist elimination do not want deashing device in the equipment, clean but behind the operation some cycles, pleat bag type filter element can be extracted out whole the immersion in the bucket, reinstall use after dehydrating.

The utility model has the following advantages and active factor compared with prior art:

1, pleat bag type filter overall dimensions is less, generally can save steel 20～40%;

2, pleat bag type filter element is compared with the cylindrical shape cloth bag of equal volume, and its filter area is big 4～6 times, the filter efficiency height,

3, filter cloth is fixed on the work under many stick states that is divided in the metal framework, and filter cloth wind-engaging tension force is little, and fluctuation changes little, helps deashing, long service life,

4, it is easy to adorn, tear open work, safeguards that the replacing workload is little.

5, help cleaning reusable reduction operating cost.

6, pleat bag type filter element is more suitable for helping quality control in professional concentration of enterprises production.

Code name of parts shown in the accompanying drawing and title contrast are as follows:

[1] ash ejector [2] dirt gas import

[3] pleat bag type filter element [4] air-purifying chamber

[5] pure qi (oxygen) outlet [6] dividing plate

[7] casing [8] dust-settling compartment

[30] pleat bag rigid mount [31] cushion film

[32] filter cloth

[301] star hole ring flange [302] vertical rod

[303] grommet [304] band support silk

[305] the interior steel bar of outer steel bar [306]

[307] presser foot under the star base plate [308]

[309] go up presser foot

Accompanying drawing one is a pleat bag type air cleaner embodiment schematic diagram, and having represented among the figure has a dividing plate [6] to be divided into top air-purifying chamber [4] and bottom dust-settling compartment [8] two parts in the middle of the casing [7].Pleat bag type filter element [3] purifies the circular hole of air chamber [4] insertion dividing plate [6] from top, and the method dirt dish of pleat bag type filter element [3] is shelved on the plane of dividing plate [6], and its cladding has the body of filter cloth partly all to fall in the dust-settling compartment [8].Pleat bag type filter element shown in the figure [3] is a back taper, and the back taper filter core finds out among the figure that the space that ascending air enters between the pleat formula filter core [3] is the wedge shape except that helping deashing and dismounting, also is more rational to the distribution of air-flow.Casing shown in the figure [7] but the top adopt open type sectional type top cover, help installing and maintenance.

Accompanying drawing two is the outline drawing of the pleat bag type filter element [3] of back taper.

Accompanying drawing three is the cross-sectional view of pleat bag type filter element [3], the position relation of vertical rod shown in the figure [302] and grommet [303], and the position that is distributed in the outer steel bar [305] of the interior steel bar [306] of inner ring and outer ring concerns.Represented clearly among the figure that filter cloth [302] wears the rule of outside the outer steel bar [305] side side within the interior steel bar [306] repeatedly, found out that filter cloth [302] is divided into many striped blocks and tight state work down.Finding out among the figure that interior steel bar [306] is in is subjected to red dog one side outside the filter cloth, should be bright and clean or the coating or the coating of low adhesion strength arranged for ease of steel bar surface in the deashing.

Accompanying drawing four is the axonometric drawing of pleat bag rigid mount [30] embodiment, there is shown the pleat bag rigid mount of 16 jiaos of back tapers, the profile of star-like flange dish [301] and star base plate [307] is shown, and the annexation between the shape of band support silk [304] and grommet [303] and the outer steel bar [805].

Claims

1, a kind of pleat bag type air cleaner with dedusting and purifying air and recovery air-flow powder is made up of ash ejector [l] dirt gas import [2] pleat bag type filter element [3] air-purifying chamber [4] pure qi (oxygen) outlet [5] dividing plate [6] casing [7] dust-settling compartment [8], it is characterized in that:

A, the cylindrical or back taper of pleat bag type filter element [3] have many uniformly vertical pleat ravines on the circumference, form by the filter cloth [32] around pleat bag rigid mount [30] cushion film [3l] and the cladding,

B, pleat bag type filter element [3] insert in the circular hole of dividing plate [6], are connected by plane between the annular flange on the pleat bag type filter element [3] and dividing plate [6], are lined with cushion film [31] therebetween,

2, pleat bag type air cleaner according to claim 1 is characterized in that the section of pleat bag type filter element [3] is polygonal starriness, and its star angle number is in 20～40 scopes.

3, pleat bag type air cleaner according to claim 1, it is characterized in that the napex that pleat bag rigidity adds [30] has star hole ring flange [301] bottom that star base plate [307] is arranged, there is 3～6 vertical rods [302] spacing to fix therebetween, has 1～3 grommet [303] to be fixed on the inboard of vertical rod [302] at the middle part of vertical rod [302].

4, pleat bag type air cleaner according to claim 3, there is polygonal star-shaped aperture star hole ring flange [301] centre that it is characterized in that pleat bag rigid mount [30], be evenly equipped with screw hole on the outer shroud mounting flange, all be drilled with a small sircle hole on the position at the bottom of star the top of the horn and the star angle.

5, pleat bag type air cleaner according to claim 3, it is held at the bottom of the star the top of the horn of levying the star base plate [307] that is pleat bag rigid mount [30] and the star angle and all is drilled with a small sircle hole on the position, and star base plate [307] equates with the star angle number of star hole ring flange [301].

6, pleat bag type air cleaner according to claim 3, the star hole ring flange [301] that it is characterized in that pleat bag rigid mount [30] is corresponding up and down with the star angle of star base plate [307], between the small sircle hole of star the top of the horn, respectively be installed with steel bar outside [305], respectively be installed with steel bar [306] between the small sircle hole at the bottom of the star angle.