CN102120118A - Filter for dedusting of process air in process unit and process unit comprising the same - Google Patents

Abstract

The invention relates to a filter (10) for dedusting of process air in a process unit and a process unit comprising the same. The filter (10) is provided with a carrier body (11), over an external side of which a cloth-like textile filter material (48) is placed. The carrier body (11) is suggested to be designed to be a vertical wave-shaped folded sheet, around which the cloth-like fabric filter material is placed.

Description

Plant air dust removal filter in the process equipment and process equipment with this filter

Technical field

The present invention relates to a kind of filter that plant air in the process equipment especially fluid unit is carried out dedusting, have supporting body, on the lateral surface of this supporting body, lay the filtering material of cloth shape fabric.

The invention still further relates to a kind of process equipment, especially a kind of fluid unit has process chamber and at the filter that is arranged on the process chamber upper end, granular material can move by means of plant air in process chamber.

Background technology

For example be positioned at German Bad WOKU Filtermedien GmbH ﹠amp; Co.KG (the limited limited partnership of WOKU filter medium) can provide this class filter.The Unifil AG Filtertechnik (Unifil filtering technique joint-stock company) that is positioned at Switzerland Niederlenz also provides similar filter.

For example EP 1 732 666 B1 disclose the process equipment that is used to handle granular material, have the filter that uses this class filter.

These known filters all possess the filter medium that is configured to lay cloth shape fabric on supporting body.If supporting body roughly has the shape of hollow cylinder shaped object, then so-called carrying basket (Tragkorb).On the carrying basket, insert the hose-like filter medium of end sealing.

If supporting body has the geometry of rectangular frame, then be called bearing frame, the filter medium of the filter bag type of end sealing is inserted on this bearing frame.

The general character of these filters is that an end opens wide.These filters can be used to filter out granular material from gaseous medium.Gaseous medium can leave at openend then from the outside via corresponding detailed catalogue filter medium inflow filter inner chamber.

Can suitably select the width of mesh of fabric filtration material, make gaseous medium to pass through, stay granular material.This class filtration system particularly is widely used in especially being applied to pharmaceutical field among the fluid unit.

Often to handle the fine-powder of particle diameter between 10～50 μ m at pharmaceutical field, in fluid unit, make these powder form eddy flow, decide on processing requirements then, for example make it be combined into bigger condensation product (granulation), perhaps it is coated to gradually and forms layer (pill) on the existing nuclear.In order to form fluid bed, must make gaseous medium (established technology air) continuously by process chamber, make granular material stir for four times, thereby form fluid bed.Because plant air flows out, and discharges from process chamber, therefore can't avoid taking away tiny material particulate from fluid bed.Therefore in the upper area (plant air flows towards this upper area) of this class process chamber the filter that comprises above-mentioned filter is installed usually.These filters are installed into the filter post of so-called suspension, just the upper open end of filter is embedded among the cover plate, make the filter area have only the flexible pipe that utilizes endcapped or filter bag to hide extend among the process chamber, perhaps be hanging among the process chamber.

Among plant air enters the filter inner chamber from the outside via filtering material in dust removal process, discharge from process equipment via upper open end then.

Especially being filtered fine solid particle that device holds back at pharmaceutical field may be unusual valuable drug, therefore want regular backwash filter, purpose is to allow break away from again attached to the particle on the filtering material lateral surface, it is fallen back among the fluid bed, and include it in processing procedure here.In this flushing process, flushing out air is blown among the filter inner chamber suddenly, makes cloth shape fabric filtration material bulging.The blow out air that from inside to outside sees through also can make the particle that is trapped on the lateral surface break away from.

Therefore the fabric filtration material is centered around around the supporting body loosely, thereby can realize certain vibration campaign in filter process, perhaps realizes corresponding balloon-like bulging motion in flushing process.

For big as far as possible effective filtration area can be provided, available club-shaped material constitutes supporting body.

If adopt the carrying basket, then the bar that will extend along the envelope of hollow cylinder links to each other with the annular or the disc housing of bottom side and top side.Owing to make these supporting bodies with metal material usually, therefore corresponding bar and housing can be welded together.For the rectangular frame shape supporting body of supporter that those conducts of being made up of bar or section bar are used for filter bag equally also is like this.

The problem of these filters is: because textile material is loose, the plant air that sees through from outside to inside under the dedusting pattern can be towards bar or grizzly bar especially towards the bight and the edge extruded fabric filtering material of supporting body.Because the conveying of plant air usually and non-constant, but have certain pressure pulse, therefore can produce above-mentioned vibration campaign, thereby make filtering material fricting movement back and forth on supporting body enduringly.

Therefore after welding, must repair supporting body very bothersomely, especially connecting portion will be repaired smooth.Also once the someone attempts supporting body is replaced to the perforated sheet with certain pass.

The shortcoming of all these structures is: almost can't enter its inboard and clean and especially check cleannes.

If the described application that has corresponding health to stipulate at pharmaceutical industry before considering obviously not only will clean such filter, and must carry out disinfection and must sterilize in case of necessity after using.Cloth shape fabric filtration material be can after use, abandon, but must after suitably cleaning supporting body, new flexible pipe or new filter bag just can be put.If the edge or the sharp keen position that might exist, thereby the risk of losing filtration also can appear damaging when installing to the filter bag cover on the supporting body.

The making that special problem is this supporting body is unreasonable, no matter is to use stainless steel as the grizzly bar Welding Structure, also is to use perforated sheet.These perforated sheets can produce (eingezogene) smooth edges of sharp keen side cut and indentation all the time in punch process.In punch process, all to cut edge in any case with the mechanically smooth sharp keen punching of very big cost.Need with the welded welding position of the smooth very bothersomely grizzly bar of mechanical device.

Summary of the invention

Therefore the objective of the invention is to, provide this class supporting body in the mode that rationally and particularly meets the pharmacy standard.

According to the present invention, realize that the technical scheme of this purpose is, supporting body is designed to the fold plate that forms around vertical fold line, fold erects from both sides, initial thin plate plane, and cloth shape filtering material is laid on around these folds.

This measure has many good qualities.

Can adopt bending/bending method, make such fold plate with a block of material, raw material can be a kind of level and smooth material.This notion of thin plate not only comprises metal material, also comprises plastic material, as long as these materials have corresponding mechanical property and stability, and also meets the pharmacy standard.

If this light sheet material is formed fold around broken line, will produce the plate body that can be referred to as " fold plate ".Fold erects from both sides, initial thin plate plane, and itself can have different geometries these folds, below also will this be described in detail and explain.As common or upper scheme, fold is projection from the initial thin plate plane, comes back to initial thin plate plane through distolateral mild rounded portions then.From the unilateral observation of thin plate, a plurality of sides phases this fold across a certain distance is outwards outstanding.Opposite one side from thin plate just has corresponding fold to erect from this thin plate plane here equally.Become from the opposite one another edge-on fold from an edge-on fold transition.Can suitably design cloth shape filtering material now, thereby it can be laid on around the outline of fold plate, and make its covering or muffle the outer end of fold.Be filtered space between two folds that material muffles and formed filter inner chamber in should the zone.Along the vertical height direction of waveform thin plate, filtering material is close to along on the outer end of the circle of the crest of fold of short transverse extension or fold.Because filtering material covering shell like this makes an end just leave a blank the upper end, so gaseous medium can enter corresponding inner chamber between two folds from the outside via filtering material among, upwards flow to openend then, here it is discharged from filter.By filtering material the fine particle that those need of being taken away by gaseous medium leach is trapped on the lateral surface.All have these situations in both sides, thin plate plane, just therefore two these class inner chambers of erectting between the fold have produced bigger effective filtering surface, just are filtered the zone between the setting fold that material muffles.Because the outer end of these folds is rounded, therefore being close to the filtering material that moves on these rounded portions does not have impaired risk.Can in bending originally or bending process, form these rounded portions, therefore not need the following process that expends.This class fold plate can bear high unit area loading and can not collapse.Because this fold plate has very strong reinforcement effect, even owing to the excessive filtration resistance that causes of air capacity load makes filter bear high pressure load, also can not collapse.

Can realize this purpose fully like this.

In another embodiment of the invention, outer circumferentially profile is determined in the outer end of the setting fold of fold plate, and cloth shape filtering material is close on this outer circumferentially profile.

This means the height of selecting fold with respect to the initial plate datum plane, and form different height, just can form different geometries and size, especially cross section or circumferentially geometry.

For example can suitably make thin plate form fold, make all folds all same high, from direction, will produce the roughly rectangular supporting body of peripheral profile so perpendicular to vertical broken line.

If the outward flange fold all is raised to middle continuously haply and descends again from the side, will produce ellipse even circular peripheral profile.

In the bending process, select the mode of moulding can develop countless different supporting body geometries.Must suitably cut cloth shape filtering material afterwards, can make or weld in case of necessity, thereby form the peripheral profile of supporting body to be covered, can be the cloth bag or the columniform flexible pipe shape of rectangle.

So just can form roughly rectangular, oval by corresponding bending process until the round nose peripheral profile.

In another embodiment of the invention, cloth shape filtering material is laid on around the fold with suitable lax tension force (Spannung), make it see through inwardly motion partly between two adjacent gauffers under the plant air effect of filtering material.

The advantage of this measure is to realize required vibration campaign in filter process.Can be under cleaning mode so that the filter cloth bulging become flexible pipe or other body of balloon-like, thus shake off the solid particle attachment that may exist suddenly.

In another embodiment of the invention, the height of fold reduces from top to bottom along the broken line direction of vertical extension.

The advantage of this measure is can be from bottom to top just to provide increasing inner space to carry air along the short transverse of filter.This means that the plant air that sees through filtering material in the zone that the bottom narrows down can not hinder plant air and enter in the higher zone, because should have bigger filter inner chamber available all the time in the zone.Will produce the optimum filtration effect in the whole short transverse of filter like this.

In another embodiment of the invention, the vertical side of fold plate is formed circle.

The advantage of this measure is that these side end zones have mild rounded portions, and filtering material extends around this rounded portions.Equally can be in these rounded portions of making very easily on the manufacturing technology on the thin plate side.

In another embodiment of the invention, the surface smoothing of fold plate.

The advantage of this measure is, if used be a kind of level and smooth sheet material, will form the fold of respective smoothed so, filtering material can friction back and forth on these folds, and can not cut or damage the risk of filtering material.

In another embodiment of the invention, the upper end of fold plate is furnished with terminal flange.

The advantage of this measure is filter to be installed by terminal flange.Also the corresponding terminal of filter cloth can be settled or is fixed on this terminal flange.So just can very simply filtering material be covered whole periphery, the filter exception of upper end open.

In another embodiment of the invention, the lower end of fold plate has the frame of enclosing.

The advantage of this measure is can enclose frame by this lower end of supporting body is surrounded, just with its sealing.

In another embodiment of the invention, suitably form fold, make the extension that is parallel to each other of the rising sidewall of fold and decline sidewall.

The advantage of this measure is to form the good especially fold plate of mechanical stability.

In another embodiment of the invention, the sidewall that extends that is parallel to each other is close together mutually.

The advantage of this measure is to have bigger inner chamber between two adjacent pleats, and the double wall that produces by two sidewalls that are close together separates this inner chamber.This embodiment is stable especially, can bear towards the mechanical force of initial thin plate plane effect on filter.

In another embodiment of the invention, there is the thin plate zone of extending between the fold along the thin plate in-plane.

The advantage of this measure is the bottom that can form the inner chamber section by these zones between two folds that erect.If these zones have suitable length, thereby it is extended on the path between two folds, will between two folds that erect, form the bottom of complete closed.The advantage of this measure be along the whole width of filter by these bottoms with the filter dimidiation.So just can when cleaning and filtering, need only and purge the filter inner chamber successively half, thereby can obtain special effective cleaning effect with blow gas pressure in full.

In another embodiment of the invention, fold is designed to the crest form.

So the wave body that produces can be called corrugated plating, has mechanical stability, and after extracting filtration flexible pipe or filter bag, just can clean two lateral surfaces easily.Because crest has the rounded portions of corresponding mild design, so cloth can strong wear in the vibration motion process and damage or impaired.Can use conventional bending or deep-draw equipment, make the wave plate easily.Even material thickness is less than 1.0mm, the wave plate also has enough mechanical stabilities, can bear the pressure pulse that occurs in the pneumatic cleaning course.

In another embodiment of the invention, process equipment is furnished with filter of the present invention, is being provided with the device that is used for clean air is blown among the filter inner chamber above the filter.

The advantage of this measure is filter to be blown clean with simple and effective way.

In another embodiment of the invention, adopt a plurality of suspension filters in the adjacent arrangement of periphery, the pipe that is blown into of clean air device for blowing extends above these filters, this is blown into pipe and can respectively clean air be blown among some filters, hides and its most contiguous filter simultaneously.

The advantage of this measure is to realize special effective cleaning effect.Hide the most contiguous filter in some filters both sides by being arranged in the cover plate that is blown into the pipe side, do not enter from the outside among these filters thereby constantly do not have plant air at this.These two filters almost were blocked in the short time, only the intermediate filter between these two filters were purged.Two neighbor filters blockades just can be guaranteed can not drop downwards towards fluid bed from the solid particle that therebetween filter purges, and can or not be inhaled into towards the motion of neighbor filter direction.So just can produce special effective cleaning effect.

In another embodiment of the invention, the radial direction of filter along its long cross section axis along circular process chamber with non-circular perimeter edge profile extends.

The advantage of this measure is can be with many filter arrangement among process chamber by the star arrangement mode, thereby produces bigger filtering surface, can carry out effective dedusting to plant air.

Also can in conjunction with utilization circulation be blown into pipe each filter of cleaning continuously, thereby can immediately the solid particle that is trapped be sent back to again among the process in the process chamber.

Obviously, the above-mentioned and following feature that also will explain in detail is not only can use according to described compound mode, and can or use, and do not depart from the scope of the present invention separately according to other compound mode.

Description of drawings

Below will describe the present invention with reference to the accompanying drawings and explain.

Relevant drawings is as follows:

Fig. 1 is the decomposition diagram of first embodiment of supporting body of the present invention,

Fig. 2 is the expanded view of wave plate shown in Figure 1 before bending,

The profile of Fig. 3 for cutting open along the hatching III-III among Fig. 1,

The profile of Fig. 4 for cutting open along the hatching IV-IV among Fig. 1,

Fig. 5 is the schematic diagram of supporting body shown in Figure 1 under installment state,

Fig. 6 is for installing to bag shape filter medium cover situation on the supporting body shown in Figure 5,

Fig. 7 is the vertical view of the filter after installing,

Fig. 8 is the underneath side elevation view of filter,

The profilograph that Fig. 9 cuts open along its short elliptical side for filter shown in Figure 7,

Figure 10 is the schematic diagram of simplifying greatly of being furnished with the process equipment of filter of the present invention,

Figure 11 is the magnification ratio view that circle surrounds part among Figure 10,

The profile of Figure 12 for cutting open along the hatching XII-XII among Figure 10,

Figure 13 is the schematic diagram of second embodiment, is similar to Fig. 3 upper semisection, has drawn the filter medium of being close among the figure,

Figure 14 is the 3rd embodiment that draws according to Figure 13,

Figure 15 is the 4th embodiment, has drawn a part here, is equivalent to the lower semisection shown in figure _ 3,

Figure 16 is the 5th embodiment that draws according to Figure 15,

Figure 17 is the 6th embodiment that draws according to Fig. 3, inserts among filter with circular periphery profile,

Figure 18 is the 7th embodiment that draws according to Fig. 3, and

Figure 19 is the 7th embodiment that draws according to Fig. 4.

The specific embodiment

Fig. 1～9 are depicted as first embodiment according to filter of the present invention, to scheme mark 10 its integral body of expression.

Filter 10 has the supporting body 11 shown in Fig. 1～5.

Supporting body 11 is made of a wave plate 12 with roughly rectangular profile 14 basically.Supporting body 11 has height 16 and width 18.

By the bending process with a flat sheet 12 ' make wave plate 12, as shown in Figure 2.

Along the thin plate 12 of vertical broken line 20 and 20 ' bending original flat ', make and observe towards rectangular profile shown in Figure 1 14 that following closely after the crest 22 is trough 24 from a side, this trough transition again is a crest 26.

Then just in time opposite from the opposite unilateral observation, trough 24 become crest 26 '.

If observe profile shown in Figure 4, just the lower end of supporting body 11 then can be found out, from being equivalent to the center reference plane 28 of thin plate 12 ' initial plane shown in Figure 2, crest is with height 30 projectioies, and the crest on opposite is also with equal height 32 projectioies.Therefore wave roughly linearly extension between each crest 22 and the most contiguous trough 24 and crest subsequently 26 roughly is equivalent to a sinusoidal line.In other words, crest 22 directly changes trough 24 into from datum plane 28 beginnings, and this trough becomes crest 26 again then.Two vertical sides 34 in the outside and 36 bend to circle towards supporting body 11.The wall thickness of thin plate 12 is between 0.6～1mm, and in the embodiment shown in the figure, thin plate is made with a kind of polishing stainless steel.Therefore be suitable among the filter of for example pharmaceutical field application.

If wish to be used for not having other field of so high hygienic requirements, then also can consider to use plastic material or the thermoplastic that it can be made this wave-like.

From profile shown in Figure 3 as can be seen, in the height 30 of the crest 22 of the upper end of supporting body 11 ' or the degree of depth 32 of the most contiguous trough 24 ' greater than the lower end.

In addition, from side 34, the height of crest 22 increases at first continuously, roughly culminates in the centre of width 18, and the vertical side 36 towards the opposite reduces again then.The crest 26 on opposite and height 32 thereof ' so same.

Will produce the substantially oblong-shaped supporting body 11 of peripheral profile 40 in a word like this in the upper end, especially as shown in Figure 7.

Upper end 58 at supporting body 11 is furnished with terminal flange 42, can adjust it, makes the upper end of its coupling fold plate 12.Therefore the profile of this terminal flange 42 is equivalent to peripheral profile 40.

Shown in Fig. 1 and 5, what the lower end of wave plate 12 was furnished with sealing encloses frame 44, and this encloses the lower end of frame sealing supporting body 11.Enclosing frame 44 by this makes the space between thin plate 12 or corresponding trough and the crest seal towards the bottom surface.

Figure 5 shows that the state after the installation.

Figure 6 shows that and install on the supporting body 11 from the bottom surface with filter bag 46 covers.Filter bag 46 is made of a kind of cloth shape fabric filtration material 48 that is sewn into sack.Filter bag 46 upper ends have flange 50, the peripheral profile 40 of these flange approximate match supporting body 11 upper ends.

Filter bag 46 47 is closed in the lower end, especially as shown in Figure 9.

According to shown in Figure 6, filter bag 46 is moved up, run into the bottom surface of terminal flange 42 until its flange 50, especially as shown in Figure 9.

Under this final installment state, form filter 10.

The upper end 58 of filter 10 is opened wide, especially shown in Fig. 9 profile.Filter 10 is sealed by the bottom 47 of filter bag 46 in the bottom surface.The fabric filtration material 48 that is laid on thin plate 12 outer periphery is loose.

If with filter 10 according to following being installed to like that among the process equipment of also will explaining in detail, so that leach granular material particulate 54 from plant air 52, then plant air 52 will see through fabric filtration material 48 via the outside and enters among the inner chamber 56 of filter 10.Especially as shown in Figure 8, under the pressure effect of the plant air 52 that sees through 48 inflows of fabric filtration material, filtering material can be pressed among two zones between the crest slightly.Because plant air 52 shows a kind of flutter component, therefore can on the filter outside, form the more or less surface of the fabric filtration material 48 of vibration.

The width of mesh of fabric filtration material is through suitably selecting, thereby can trapped particles shape material particulate 54, and plant air 52 then can see through fabric filtration material 48 and flow among the inner chambers 56.Plant air 52 flows out via the upper open end 58 of filter 10, especially as shown in Figure 9.

If after certain hour, granular material particulate 54 attachments that form on fabric filtration material 48 lateral surfaces are purged totally again, then can be blown into clean air by openend 58.At this moment fabric filtration material 48 will be the balloon-like bulging, removes material particulate 54 attached to the outside by the purging air that outwards sees through from the inboard or clean air, and can be with its discharge or utilize again, below also will be elaborated to this.

Space between two crests and the therebetween trough can be passed through for the plant air via outer side inflow.

Because V-shaped upwards enlarge (referring to Fig. 9), it is big that this space constantly becomes, and makes that plant air can be in the even inflow of whole height of filter 10.

Figure 10～12 are depicted as with Reference numeral 60 its whole process equipments of expression.

Process equipment 60 has the cylindrical wall 62 that erects, and thereunder the zone is provided with bottom 64.The bottom 64 has a large amount of through holes 68, and plant air 52 can pass through hole and enter among the process chamber 65 via bottom 64 from flowing into chamber 66.By stir granular material 54 on 64 the end face of bottom of plant air 52, make it form fluid bed 72.Plant air 52 flows out from fluid bed 72, upwards flows to filter 76 then.The filter 10 of filter 76 leaches the material particulate 54 that is pulled away.

Especially as can be seen, filter 76 amounts to and has 16 foregoing filters 10 from profile shown in Figure 12.

These 16 filters 10 are star and are provided with, and extend along radius 67 directions of circular process chamber 65.This 16 filters 10 are through suitably installing, thereby its upper open end 58 is inserted respectively among the correspondingly configured opening 84 in dividing plate 74.

The device 80 that utilizes purging air 88 to purge the inner chamber 56 of filter 10 is centered around dividing plate 74 tops.

Device 80 have around central axis 81 rotation be blown into pipe 82, its mouth of pipe 83 can be respectively overlaps with opening 84 in the dividing plate 74.

As shown in figure 12, be blown into pipe and 82 have side cover plate 86, when being blown into pipe 82 and being positioned at some filters 10 ' top, these cover plates will hide adjacent filter 10 ".

Can by be blown into the pipe 82 via filter 10 ' upper open end 58 be blown into purging air 88, wherein fabric filtration material 48 bulging are got up, thereby make the granular material particulate 54 that adheres to break away from, fall back to again on the fluid bed 72, and include it in processing procedure here.

The advantage of cover plate 86 is, in the process to filter 10 ' purge, and the risk among adjacent filter 10 " is almost closed, will be drawn into adjacent filter 10 from the material particulate of filter 10 ' disengaging thereby do not exist ".

Can produce special effective cleaning effect like this.

Equally also other bending that the present invention relates to or the embodiment of bending thin plate shown in Figure 13～19.

Below all common ground of implementing modification be that the fabric filtration material is centered around by around corresponding crest or the determined peripheral profile of fold.

Figure 13 shows that second embodiment of filter 90, thin plate 92 makes crest form the dome 94 of the side 95,97 with almost parallel through suitably crooked.Thin plate 92 between the dome 94 partly extends in initial baseline plane 96.Thereby form a kind of stable especially supporting body.

It is substantially oblong-shaped to put the peripheral profile 98 that forms behind the fabric filtration material, and its fulcrum is respectively the round tip of dome 94.The side of originally smooth raw material thin plate here also is to form circle.

Figure 14 shows that the 3rd embodiment of filter 100, the thin plate 102 after the moulding has the proper level cross-sectional configuration, makes ripple 104 be equivalent to the tooth of gear.Here also produced a kind of substantially oblong-shaped peripheral profile.

Figure 15 shows that the 4th embodiment of filter 110, thin plate makes formed tooth 112 have the side 114 of almost parallel through suitably crooked.

This embodiment can bear high pressure or pulsating motion suddenly, and in addition, fabric filtration material 116 only is point-like or above short transverse is adjacent to narrow tooth top at tooth 112.

Figure 16 shows that the 5th embodiment of filter 120 of the present invention, thin plate makes dome 122 form fold together with the side of almost parallel through suitable bending, and these folds change the dome on corresponding fold or opposite respectively into along bending area 124.Here also can after laying filtering material 126, form substantially oblong-shaped peripheral profile.

Figure 17 shows that the 6th embodiment, thin plate makes the tooth top of formed crest 132 be positioned on the circular periphery profile 142 through suitably crooked.Corresponding crest 132 is transformed into the most contiguous crest in opposite via linear side 134,136.

Form additional crest 145,147 by outermost side 144,146 extruding, these crests can make peripheral profile 142 " form circular ".

So also can form or be bent into rounded filter 130 matrixes of its peripheral profile 142 with flat sheet.

This just means that in the present embodiment available profiled bar and end ring or end plate supporting body that form, that be used for the suit rounded pocket substitutes crooked thin plate.

Here especially as can be seen, be easy to clean all sides especially side 131,131 '.If carry out moulding with a thin plate with smooth surface, then formed supporting body not only has the smooth surface of easy cleaning, and around filter bag being laid in friction mode seldom.

Figure 18 and 19 is depicted as the 7th embodiment of filter 150, and thin plate 152 is through suitable bending, thus the fold 153 and 154 that formation erects from thin plate plane 155, and the respective side edge 157 and 158 of these folds is close together mutually.Directly mutually transition of the fold of facing mutually 153 and 154, and show right angle projection from the thin plate plane 155 greatly.Zone between two adjacent pleats 153 is by thin plate 152 complete closed, thereby forms the one side closed inner chamber 156 in bottom in 155 left sides, thin plate plane and right side.Before described process equipment be blown into the inner chamber that pipe purges 155 left sides, thin plate plane can be above the upper open end that moves to filter 150 time at first separately, just all purge the left-half that air-flow all is used to purge filter 150.Be rotated further and be blown into after the pipe, just can purge the zone on 155 right sides, thin plate plane.The peripheral profile of filter 150 is ovalize again in the upper end.

In the embodiment shown in Figure 13～16 and Figure 18 and 19, if observe towards side, supporting body is from going up V-shaped expansion down, as shown in Figure 9.

So just can make all known supporting bodies or filter basic configuration according to principle of the present invention.

Even under the situation of lamella thickness less than 1.0mm, above-mentioned corrugated plate or wave plate also can bear high compressive load per unit area.Be laid on the supporting body filtering material on every side and may be stained with a large amount of particles, therefore having very big compressive load per unit area acts on the filtering material of attaching and following supporting body thereof.Blower pressure in the process equipment is 10000Pa, and compressive load per unit area is roughly 1000kg/m ²If the filter area of filter is 0.5m ², then pressure is 250kg.

Claims (17)

1. filter, be used for process equipment (60) the especially plant air of fluid unit (52) is carried out dedusting, has supporting body (11), lay a kind of fabric cloth shape filtering material (48,116,126) at the lateral surface of supporting body, it is characterized in that, supporting body (11) is designed to around vertical broken line (20,20 ') fold plate (12,92,102,152) that is folded to form, wherein, fold (153,154) is from thin plate plane (28,96,155) both sides erect, and lay cloth shape filtering material (48,116,126) around described fold.

2. filter according to claim 1, it is characterized in that, neighboring profile (40,98,142) is determined in the outer end of the fold (153,154) of fold plate (12,92,102,155), and cloth shape filtering material (48,116,126) is close on the profile of described neighboring.

3. filter according to claim 1 and 2 is characterized in that, described peripheral profile can roughly be embodied as rectangle, ellipse (40,98) until circular (142).

4. according to each described filter in the claim 1～3, it is characterized in that, lay cloth shape filtering material (48,116,126) with suitably lax tension force around fold (153,154), make that filtering material can inwardly motion between two adjacent pleats (153,154) partly under plant air (52) effect that sees through filtering material (48,116,126).

5. according to each described filter in the claim 1～4, it is characterized in that the height (30,30 ') of fold (153,154) reduces along the broken line (20) of the vertical extension of supporter (11) from top to bottom.

6. according to each described filter in the claim 1～5, it is characterized in that, make the vertical side (34,36,160,162) of fold plate (11,92,102) form circular.

7. according to each described filter in the claim 1～6, it is characterized in that the surface (37,38 of fold plate (12); 131,131 ') be level and smooth.

8. according to each described filter in the claim 1～7, it is characterized in that, fold plate (12) in the upper end (58) be furnished with terminal flange (42).

9. according to each described filter in the claim 1～8, it is characterized in that, fold plate (12) in the lower end (44) be furnished with the frame of enclosing (44).

10. according to each described filter in the claim 1～9, it is characterized in that following formation fold makes the side (95,97 of rising and decline of fold; 114; 157, the 158) extension that is parallel to each other.

11. filter according to claim 10 is characterized in that, the side (157,158) that extends that is parallel to each other is close together mutually.

12., it is characterized in that having the thin plate zone of in initial thin plate plane (96,155), extending between two adjacent pleats (153,154) according to each described filter in the claim 1～11.

13. according to each described filter in the claim 1～12, it is characterized in that, fold be designed to crest (22,26) form.

14. process equipment, especially fluid unit, have process chamber (65) and be arranged on the filter (76) of process chamber (65) upper end, can utilize plant air (52) to make granular material (70) in process chamber, move, it is characterized in that filter (76) has at least one according to each described filter (10,90,110,12,130,150) in the claim 1～13.

15. process equipment according to claim 14 is characterized in that, has the device (80) among the inner chamber (56) that is used for clean air (88) is blown into filter (10) in filter (10,90,110,120,150) top.

16. process equipment according to claim 15, it is characterized in that, be equipped with a plurality of suspension filters that are the adjacent arrangement of star (10,10 ', 10 "); the pipe (82) that is blown into of device (80) moves above described filter; the described pipe that is blown into is blown into a filter (10 ') with clean air, hides simultaneously and its most contiguous filter (10 ").

17., it is characterized in that filter (10,90,110,120,150) has non-circular peripheral profile according to claim 15 or 16 described filters, its long cross section axis extends along radius (67) direction of circular process chamber (65).

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